#include <netinet/sctp_os.h>
#include <sys/proc.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_header.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_indata.h>
#include <netinet/sctp_bsd_addr.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_crc32.h>
#include <netinet/sctp_kdtrace.h>
#if defined(INET) || defined(INET6)
#include <netinet/udp.h>
#endif
#include <netinet/udp_var.h>
#include <machine/in_cksum.h>
#define SCTP_MAX_GAPS_INARRAY 4
struct sack_track {
uint8_t right_edge;
uint8_t left_edge;
uint8_t num_entries;
uint8_t spare;
struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
};
const struct sack_track sack_array[256] = {
{0, 0, 0, 0,
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{2, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{2, 2},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{3, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{2, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{2, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{4, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{4, 4},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{3, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{2, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{2, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{5, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{3, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 3, 0,
{{1, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{4, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{4, 5},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{3, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{3, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{3, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{3, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{2, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{2, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{6, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{3, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{3, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0,
{{1, 1},
{3, 3},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 1},
{3, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{4, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0,
{{1, 1},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 1},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0,
{{2, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 4, 0,
{{0, 0},
{2, 2},
{4, 4},
{6, 6}
}
},
{0, 0, 3, 0,
{{1, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{3, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{3, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0,
{{1, 1},
{3, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 1},
{3, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{5, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{3, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{3, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 3, 0,
{{1, 1},
{3, 3},
{5, 6},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 1},
{3, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{4, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{2, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0,
{{0, 0},
{2, 2},
{4, 6},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{3, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{3, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0,
{{1, 1},
{3, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 1},
{3, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{2, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0,
{{0, 0},
{2, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0,
{{1, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0,
{{0, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{7, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 1},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 1},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 2},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 3},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{4, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{2, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{2, 2},
{4, 4},
{7, 7}
}
},
{0, 1, 3, 0,
{{1, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{5, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{2, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{2, 2},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0,
{{1, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{3, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{3, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 4, 0,
{{1, 1},
{3, 3},
{5, 5},
{7, 7}
}
},
{1, 1, 4, 0,
{{0, 1},
{3, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0,
{{2, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{2, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0,
{{1, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{4, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{2, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{2, 2},
{4, 5},
{7, 7}
}
},
{0, 1, 3, 0,
{{1, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{6, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 1},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 1},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 2},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 3},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{4, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{2, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 4, 0,
{{0, 0},
{2, 2},
{4, 4},
{6, 7}
}
},
{0, 1, 3, 0,
{{1, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{5, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 1},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 1},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 2},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{3, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{3, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 3, 0,
{{1, 1},
{3, 3},
{5, 7},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 1},
{3, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{4, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 1},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 1},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{2, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0,
{{0, 0},
{2, 2},
{4, 7},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{3, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{3, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0,
{{1, 1},
{3, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 1},
{3, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{2, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0,
{{0, 0},
{2, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0,
{{1, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 1, 0,
{{0, 7},
{0, 0},
{0, 0},
{0, 0}
}
}
};
int
sctp_is_address_in_scope(struct sctp_ifa *ifa,
struct sctp_scoping *scope,
int do_update)
{
if ((scope->loopback_scope == 0) &&
(ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
return (0);
}
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
if (scope->ipv4_addr_legal) {
struct sockaddr_in *sin;
sin = &ifa->address.sin;
if (sin->sin_addr.s_addr == 0) {
return (0);
}
if ((scope->ipv4_local_scope == 0) &&
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
return (0);
}
} else {
return (0);
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (scope->ipv6_addr_legal) {
struct sockaddr_in6 *sin6;
if (do_update) {
sctp_gather_internal_ifa_flags(ifa);
}
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
return (0);
}
sin6 = &ifa->address.sin6;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
return (0);
}
if (
(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
return (0);
}
if ((scope->site_scope == 0) &&
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
return (0);
}
} else {
return (0);
}
break;
#endif
default:
return (0);
}
return (1);
}
static struct mbuf *
sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
{
#if defined(INET) || defined(INET6)
struct sctp_paramhdr *paramh;
struct mbuf *mret;
uint16_t plen;
#endif
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
break;
#endif
#ifdef INET6
case AF_INET6:
plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
break;
#endif
default:
return (m);
}
#if defined(INET) || defined(INET6)
if (M_TRAILINGSPACE(m) >= plen) {
paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
mret = m;
} else {
mret = m;
while (SCTP_BUF_NEXT(mret) != NULL) {
mret = SCTP_BUF_NEXT(mret);
}
SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
if (SCTP_BUF_NEXT(mret) == NULL) {
return (m);
}
mret = SCTP_BUF_NEXT(mret);
paramh = mtod(mret, struct sctp_paramhdr *);
}
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
{
struct sctp_ipv4addr_param *ipv4p;
struct sockaddr_in *sin;
sin = &ifa->address.sin;
ipv4p = (struct sctp_ipv4addr_param *)paramh;
paramh->param_type = htons(SCTP_IPV4_ADDRESS);
paramh->param_length = htons(plen);
ipv4p->addr = sin->sin_addr.s_addr;
SCTP_BUF_LEN(mret) += plen;
break;
}
#endif
#ifdef INET6
case AF_INET6:
{
struct sctp_ipv6addr_param *ipv6p;
struct sockaddr_in6 *sin6;
sin6 = &ifa->address.sin6;
ipv6p = (struct sctp_ipv6addr_param *)paramh;
paramh->param_type = htons(SCTP_IPV6_ADDRESS);
paramh->param_length = htons(plen);
memcpy(ipv6p->addr, &sin6->sin6_addr,
sizeof(ipv6p->addr));
in6_clearscope((struct in6_addr *)ipv6p->addr);
SCTP_BUF_LEN(mret) += plen;
break;
}
#endif
default:
return (m);
}
if (len != NULL) {
*len += plen;
}
return (mret);
#endif
}
struct mbuf *
sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_scoping *scope,
struct mbuf *m_at, int cnt_inits_to,
uint16_t *padding_len, uint16_t *chunk_len)
{
struct sctp_vrf *vrf = NULL;
int cnt, limit_out = 0, total_count;
uint32_t vrf_id;
vrf_id = inp->def_vrf_id;
SCTP_IPI_ADDR_RLOCK();
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL) {
SCTP_IPI_ADDR_RUNLOCK();
return (m_at);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
struct sctp_ifa *sctp_ifap;
struct sctp_ifn *sctp_ifnp;
cnt = cnt_inits_to;
if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
limit_out = 1;
cnt = SCTP_ADDRESS_LIMIT;
goto skip_count;
}
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
if ((scope->loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
continue;
}
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
continue;
}
if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
continue;
}
cnt++;
if (cnt > SCTP_ADDRESS_LIMIT) {
break;
}
}
if (cnt > SCTP_ADDRESS_LIMIT) {
break;
}
}
skip_count:
if (cnt > 1) {
total_count = 0;
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
cnt = 0;
if ((scope->loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
continue;
}
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
continue;
}
if (sctp_is_address_in_scope(sctp_ifap,
scope, 0) == 0) {
continue;
}
if ((chunk_len != NULL) &&
(padding_len != NULL) &&
(*padding_len > 0)) {
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
SCTP_BUF_LEN(m_at) += *padding_len;
*chunk_len += *padding_len;
*padding_len = 0;
}
m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
if (limit_out) {
cnt++;
total_count++;
if (cnt >= 2) {
break;
}
if (total_count > SCTP_ADDRESS_LIMIT) {
break;
}
}
}
}
}
} else {
struct sctp_laddr *laddr;
cnt = cnt_inits_to;
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
continue;
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
continue;
}
if (sctp_is_address_in_scope(laddr->ifa,
scope, 1) == 0) {
continue;
}
cnt++;
}
if (cnt > 1) {
cnt = cnt_inits_to;
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
continue;
}
if (sctp_is_address_in_scope(laddr->ifa,
scope, 0) == 0) {
continue;
}
if ((chunk_len != NULL) &&
(padding_len != NULL) &&
(*padding_len > 0)) {
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
SCTP_BUF_LEN(m_at) += *padding_len;
*chunk_len += *padding_len;
*padding_len = 0;
}
m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
cnt++;
if (cnt >= SCTP_ADDRESS_LIMIT) {
break;
}
}
}
}
SCTP_IPI_ADDR_RUNLOCK();
return (m_at);
}
static struct sctp_ifa *
sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
uint8_t dest_is_global = 0;
if (ifa->address.sa.sa_family != fam) {
return (NULL);
}
if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
dest_is_global = 1;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
#ifdef INET6
if (fam == AF_INET6) {
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
return (NULL);
}
if (ifa->src_is_priv && !ifa->src_is_loop) {
if (dest_is_loop) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
return (NULL);
}
}
if (ifa->src_is_glob) {
if (dest_is_loop) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
return (NULL);
}
}
}
#endif
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
dest_is_loop, dest_is_priv, dest_is_global);
if ((ifa->src_is_loop) && (dest_is_priv)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
return (NULL);
}
if ((ifa->src_is_glob) && (dest_is_priv)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
return (NULL);
}
if ((ifa->src_is_loop) && (dest_is_global)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
return (NULL);
}
if ((ifa->src_is_priv) && (dest_is_global)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
return (ifa);
}
static struct sctp_ifa *
sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
uint8_t dest_is_global = 0;
if (ifa->address.sa.sa_family != fam) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
ifa->address.sa.sa_family, fam);
return (NULL);
}
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
dest_is_loop, dest_is_priv);
if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
dest_is_global = 1;
}
#ifdef INET6
if (fam == AF_INET6) {
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
return (NULL);
}
if (ifa->src_is_priv) {
if (dest_is_loop)
return (NULL);
}
}
#endif
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
ifa->src_is_loop,
dest_is_priv);
if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
ifa->src_is_loop,
dest_is_global);
if ((ifa->src_is_loop == 1) && (dest_is_global)) {
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
return (ifa);
}
int
sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
{
struct sctp_laddr *laddr;
if (stcb == NULL) {
return (0);
}
LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
__func__);
continue;
}
if (laddr->ifa == ifa) {
return (1);
}
}
return (0);
}
int
sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
{
struct sctp_laddr *laddr;
if (ifa == NULL)
return (0);
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
__func__);
continue;
}
if ((laddr->ifa == ifa) && laddr->action == 0)
return (1);
}
return (0);
}
static struct sctp_ifa *
sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
sctp_route_t *ro,
uint32_t vrf_id,
int non_asoc_addr_ok,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
sa_family_t fam)
{
struct sctp_laddr *laddr, *starting_point;
void *ifn;
int resettotop = 0;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
struct sctp_vrf *vrf;
uint32_t ifn_index;
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
if (sctp_ifn) {
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (sctp_is_addr_in_ep(inp, sifa)) {
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
}
starting_point = inp->next_addr_touse;
once_again:
if (inp->next_addr_touse == NULL) {
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
resettotop = 1;
}
for (laddr = inp->next_addr_touse; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
continue;
}
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (resettotop == 0) {
inp->next_addr_touse = NULL;
goto once_again;
}
inp->next_addr_touse = starting_point;
resettotop = 0;
once_again_too:
if (inp->next_addr_touse == NULL) {
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
resettotop = 1;
}
for (laddr = inp->next_addr_touse; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
continue;
}
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (resettotop == 0) {
inp->next_addr_touse = NULL;
goto once_again_too;
}
return (NULL);
}
static struct sctp_ifa *
sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
sctp_route_t *ro,
uint32_t vrf_id,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
int non_asoc_addr_ok,
sa_family_t fam)
{
struct sctp_laddr *laddr, *starting_point;
void *ifn;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
uint8_t start_at_beginning = 0;
struct sctp_vrf *vrf;
uint32_t ifn_index;
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
if (sctp_ifn) {
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
continue;
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
continue;
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
}
starting_point = stcb->asoc.last_used_address;
sctp_from_the_top:
if (stcb->asoc.last_used_address == NULL) {
start_at_beginning = 1;
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
}
for (laddr = stcb->asoc.last_used_address; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
continue;
}
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
stcb->asoc.last_used_address = laddr;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (start_at_beginning == 0) {
stcb->asoc.last_used_address = NULL;
goto sctp_from_the_top;
}
stcb->asoc.last_used_address = starting_point;
start_at_beginning = 0;
sctp_from_the_top2:
if (stcb->asoc.last_used_address == NULL) {
start_at_beginning = 1;
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
}
for (laddr = stcb->asoc.last_used_address; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
continue;
}
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
stcb->asoc.last_used_address = laddr;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (start_at_beginning == 0) {
stcb->asoc.last_used_address = NULL;
goto sctp_from_the_top2;
}
return (NULL);
}
static struct sctp_ifa *
sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int non_asoc_addr_ok,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
int addr_wanted,
sa_family_t fam,
sctp_route_t *ro)
{
struct sctp_ifa *ifa, *sifa;
int num_eligible_addr = 0;
#ifdef INET6
struct sockaddr_in6 sin6, lsa6;
if (fam == AF_INET6) {
memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
(void)sa6_recoverscope(&sin6);
}
#endif
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
#ifdef INET
if ((ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
#ifdef INET6
if (fam == AF_INET6 &&
dest_is_loop &&
sifa->src_is_loop && sifa->src_is_priv) {
continue;
}
if (fam == AF_INET6 &&
IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
(void)sa6_recoverscope(&lsa6);
if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
continue;
}
}
#endif
#ifdef INET6
if (stcb && fam == AF_INET6 &&
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) == 0) {
continue;
}
}
#endif
#ifdef INET
if (stcb && fam == AF_INET &&
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
continue;
}
}
#endif
if (stcb) {
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
}
if (num_eligible_addr >= addr_wanted) {
return (sifa);
}
num_eligible_addr++;
}
return (NULL);
}
static int
sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int non_asoc_addr_ok,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
struct sctp_ifa *ifa, *sifa;
int num_eligible_addr = 0;
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
#ifdef INET
if ((ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((ifa->address.sa.sa_family == AF_INET6) &&
(stcb != NULL) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0)) {
continue;
}
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL) {
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
continue;
}
}
num_eligible_addr++;
}
return (num_eligible_addr);
}
static struct sctp_ifa *
sctp_choose_boundall(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_nets *net,
sctp_route_t *ro,
uint32_t vrf_id,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
int non_asoc_addr_ok,
sa_family_t fam)
{
int cur_addr_num = 0, num_preferred = 0;
void *ifn;
struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
uint32_t ifn_index;
struct sctp_vrf *vrf;
#ifdef INET
int retried = 0;
#endif
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
if (sctp_ifn == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
goto bound_all_plan_b;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
ifn_index, sctp_ifn->ifn_name);
if (net) {
cur_addr_num = net->indx_of_eligible_next_to_use;
}
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
inp, stcb,
non_asoc_addr_ok,
dest_is_loop,
dest_is_priv, fam);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
num_preferred, sctp_ifn->ifn_name);
if (num_preferred == 0) {
goto bound_all_plan_b;
}
if (cur_addr_num >= num_preferred) {
cur_addr_num = 0;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
dest_is_priv, cur_addr_num, fam, ro);
if (sctp_ifa) {
atomic_add_int(&sctp_ifa->refcount, 1);
if (net) {
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
}
return (sctp_ifa);
}
bound_all_plan_b:
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
sctp_ifn->ifn_name);
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
continue;
}
if ((sctp_ifn == looked_at) && looked_at) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
continue;
}
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
dest_is_loop, dest_is_priv, fam);
SCTPDBG(SCTP_DEBUG_OUTPUT2,
"Found ifn:%p %d preferred source addresses\n",
ifn, num_preferred);
if (num_preferred == 0) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
continue;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2,
"num preferred:%d on interface:%p cur_addr_num:%d\n",
num_preferred, (void *)sctp_ifn, cur_addr_num);
if (cur_addr_num >= num_preferred) {
cur_addr_num = 0;
}
sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
dest_is_priv, cur_addr_num, fam, ro);
if (sifa == NULL)
continue;
if (net) {
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
cur_addr_num);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
#ifdef INET
again_with_private_addresses_allowed:
#endif
sifa = NULL;
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
if (emit_ifn == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
goto plan_d;
}
LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
continue;
}
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
sifa = NULL;
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
sifa = NULL;
continue;
}
}
atomic_add_int(&sifa->refcount, 1);
goto out;
}
plan_d:
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (stcb) {
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
sifa = NULL;
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
sifa = NULL;
continue;
}
}
goto out;
}
}
#ifdef INET
if (stcb) {
if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
stcb->asoc.scope.ipv4_local_scope = 1;
retried = 1;
goto again_with_private_addresses_allowed;
} else if (retried == 1) {
stcb->asoc.scope.ipv4_local_scope = 0;
}
}
#endif
out:
#ifdef INET
if (sifa) {
if (retried == 1) {
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
struct sctp_ifa *tmp_sifa;
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (tmp_sifa == NULL) {
continue;
}
if (tmp_sifa == sifa) {
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(tmp_sifa,
&stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, tmp_sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, tmp_sifa)) &&
(!sctp_is_addr_pending(stcb, tmp_sifa)))) {
continue;
}
}
if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
(IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
sctp_add_local_addr_restricted(stcb, tmp_sifa);
}
}
}
}
atomic_add_int(&sifa->refcount, 1);
}
#endif
return (sifa);
}
struct sctp_ifa *
sctp_source_address_selection(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
sctp_route_t *ro,
struct sctp_nets *net,
int non_asoc_addr_ok, uint32_t vrf_id)
{
struct sctp_ifa *answer;
uint8_t dest_is_priv, dest_is_loop;
sa_family_t fam;
#ifdef INET
struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
#endif
#ifdef INET6
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
#endif
if (ro->ro_nh == NULL) {
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
if (ro->ro_nh == NULL) {
return (NULL);
}
fam = ro->ro_dst.sa_family;
dest_is_priv = dest_is_loop = 0;
switch (fam) {
#ifdef INET
case AF_INET:
if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
dest_is_loop = 1;
if (net != NULL) {
net->addr_is_local = 1;
}
} else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
dest_is_priv = 1;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
SCTP_ROUTE_IS_REAL_LOOP(ro)) {
dest_is_loop = 1;
if (net != NULL) {
net->addr_is_local = 1;
}
} else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
dest_is_priv = 1;
}
break;
#endif
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
SCTP_IPI_ADDR_RLOCK();
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
dest_is_priv, dest_is_loop,
non_asoc_addr_ok, fam);
SCTP_IPI_ADDR_RUNLOCK();
return (answer);
}
if (stcb) {
answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
vrf_id, dest_is_priv,
dest_is_loop,
non_asoc_addr_ok, fam);
} else {
answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
non_asoc_addr_ok,
dest_is_priv,
dest_is_loop, fam);
}
SCTP_IPI_ADDR_RUNLOCK();
return (answer);
}
static bool
sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
{
struct cmsghdr cmh;
struct sctp_sndinfo sndinfo;
struct sctp_prinfo prinfo;
struct sctp_authinfo authinfo;
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
bool found;
found = false;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
return (found);
}
m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
return (found);
}
if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
return (found);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
if ((cmh.cmsg_level == IPPROTO_SCTP) &&
((c_type == cmh.cmsg_type) ||
((c_type == SCTP_SNDRCV) &&
((cmh.cmsg_type == SCTP_SNDINFO) ||
(cmh.cmsg_type == SCTP_PRINFO) ||
(cmh.cmsg_type == SCTP_AUTHINFO))))) {
if (c_type == cmh.cmsg_type) {
if (cpsize > INT_MAX) {
return (found);
}
if (cmsg_data_len < (int)cpsize) {
return (found);
}
m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
return (1);
} else {
struct sctp_sndrcvinfo *sndrcvinfo;
sndrcvinfo = (struct sctp_sndrcvinfo *)data;
if (!found) {
if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
return (found);
}
memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
}
switch (cmh.cmsg_type) {
case SCTP_SNDINFO:
if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
sndrcvinfo->sinfo_context = sndinfo.snd_context;
sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
break;
case SCTP_PRINFO:
if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
} else {
sndrcvinfo->sinfo_timetolive = 0;
}
sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
break;
case SCTP_AUTHINFO:
if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
return (found);
}
m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
sndrcvinfo->sinfo_keynumber_valid = 1;
sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
break;
default:
return (found);
}
found = true;
}
}
}
return (found);
}
static int
sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
{
struct cmsghdr cmh;
struct sctp_initmsg initmsg;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
*error = EINVAL;
return (1);
}
m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
*error = EINVAL;
return (1);
}
if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
*error = EINVAL;
return (1);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
case SCTP_INIT:
if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
*error = EINVAL;
return (1);
}
m_copydata(control, cmsg_data_off, sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
if (initmsg.sinit_max_attempts)
stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
if (initmsg.sinit_num_ostreams)
stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
if (initmsg.sinit_max_instreams)
stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
if (initmsg.sinit_max_init_timeo)
stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
struct sctp_stream_out *tmp_str;
unsigned int i;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
SCTP_TCB_UNLOCK(stcb);
SCTP_MALLOC(tmp_str,
struct sctp_stream_out *,
(stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
SCTP_M_STRMO);
SCTP_TCB_LOCK(stcb);
if (tmp_str != NULL) {
SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
stcb->asoc.strmout = tmp_str;
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
} else {
stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
}
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
stcb->asoc.strmout[i].chunks_on_queues = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
}
#else
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
#endif
stcb->asoc.strmout[i].next_mid_ordered = 0;
stcb->asoc.strmout[i].next_mid_unordered = 0;
stcb->asoc.strmout[i].sid = i;
stcb->asoc.strmout[i].last_msg_incomplete = 0;
stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
}
}
break;
#ifdef INET
case SCTP_DSTADDRV4:
if (cmsg_data_len < (int)sizeof(struct in_addr)) {
*error = EINVAL;
return (1);
}
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_port = stcb->rport;
m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
if (in_broadcast(sin.sin_addr) ||
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
*error = EINVAL;
return (1);
}
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
break;
#endif
#ifdef INET6
case SCTP_DSTADDRV6:
if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
*error = EINVAL;
return (1);
}
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_port = stcb->rport;
m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
*error = EINVAL;
return (1);
}
#ifdef INET
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
in6_sin6_2_sin(&sin, &sin6);
if (in_broadcast(sin.sin_addr) ||
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
*error = EINVAL;
return (1);
}
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
} else
#endif
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
break;
#endif
default:
break;
}
}
}
return (0);
}
#if defined(INET) || defined(INET6)
static struct sctp_tcb *
sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
uint16_t port,
struct mbuf *control,
struct sctp_nets **net_p,
int *error)
{
struct cmsghdr cmh;
struct sctp_tcb *stcb;
struct sockaddr *addr;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
tot_len = SCTP_BUF_LEN(control);
for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
rem_len = tot_len - off;
if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
*error = EINVAL;
return (NULL);
}
m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
*error = EINVAL;
return (NULL);
}
if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
*error = EINVAL;
return (NULL);
}
cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
#ifdef INET
case SCTP_DSTADDRV4:
if (cmsg_data_len < (int)sizeof(struct in_addr)) {
*error = EINVAL;
return (NULL);
}
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_port = port;
m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
addr = (struct sockaddr *)&sin;
break;
#endif
#ifdef INET6
case SCTP_DSTADDRV6:
if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
*error = EINVAL;
return (NULL);
}
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_port = port;
m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
#ifdef INET
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
in6_sin6_2_sin(&sin, &sin6);
addr = (struct sockaddr *)&sin;
} else
#endif
addr = (struct sockaddr *)&sin6;
break;
#endif
default:
addr = NULL;
break;
}
if (addr) {
stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
if (stcb != NULL) {
return (stcb);
}
}
}
}
return (NULL);
}
#endif
static struct mbuf *
sctp_add_cookie(struct mbuf *init, int init_offset,
struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
{
struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
struct sctp_state_cookie *stc;
struct sctp_paramhdr *ph;
uint16_t cookie_sz;
mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
sizeof(struct sctp_paramhdr)), 0,
M_NOWAIT, 1, MT_DATA);
if (mret == NULL) {
return (NULL);
}
copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
if (copy_init == NULL) {
sctp_m_freem(mret);
return (NULL);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
}
#endif
copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
M_NOWAIT);
if (copy_initack == NULL) {
sctp_m_freem(mret);
sctp_m_freem(copy_init);
return (NULL);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
}
#endif
ph = mtod(mret, struct sctp_paramhdr *);
SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
sizeof(struct sctp_paramhdr);
stc = (struct sctp_state_cookie *)((caddr_t)ph +
sizeof(struct sctp_paramhdr));
ph->param_type = htons(SCTP_STATE_COOKIE);
ph->param_length = 0;
memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
cookie_sz = 0;
for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
SCTP_BUF_NEXT(m_at) = copy_init;
break;
}
}
for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
SCTP_BUF_NEXT(m_at) = copy_initack;
break;
}
}
for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
break;
}
}
sig = sctp_get_mbuf_for_msg(SCTP_SIGNATURE_SIZE, 0, M_NOWAIT, 1, MT_DATA);
if (sig == NULL) {
sctp_m_freem(mret);
return (NULL);
}
SCTP_BUF_NEXT(m_at) = sig;
SCTP_BUF_LEN(sig) = SCTP_SIGNATURE_SIZE;
cookie_sz += SCTP_SIGNATURE_SIZE;
ph->param_length = htons(cookie_sz);
*signature = (uint8_t *)mtod(sig, caddr_t);
memset(*signature, 0, SCTP_SIGNATURE_SIZE);
return (mret);
}
static uint8_t
sctp_get_ect(struct sctp_tcb *stcb)
{
if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
return (SCTP_ECT0_BIT);
} else {
return (0);
}
}
#if defined(INET) || defined(INET6)
static void
sctp_handle_no_route(struct sctp_tcb *stcb,
struct sctp_nets *net,
int so_locked)
{
SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
if (net) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
if (net->dest_state & SCTP_ADDR_CONFIRMED) {
if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
stcb, 0,
(void *)net,
so_locked);
net->dest_state &= ~SCTP_ADDR_REACHABLE;
net->dest_state &= ~SCTP_ADDR_PF;
}
}
if (stcb) {
if (net == stcb->asoc.primary_destination) {
struct sctp_nets *alt;
alt = sctp_find_alternate_net(stcb, net, 0);
if (alt != net) {
if (stcb->asoc.alternate) {
sctp_free_remote_addr(stcb->asoc.alternate);
}
stcb->asoc.alternate = alt;
atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
if (net->ro._s_addr) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
}
}
}
}
#endif
static int
sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_nets *net,
struct sockaddr *to,
struct mbuf *m,
uint32_t auth_offset,
struct sctp_auth_chunk *auth,
uint16_t auth_keyid,
int nofragment_flag,
int ecn_ok,
int out_of_asoc_ok,
uint16_t src_port,
uint16_t dest_port,
uint32_t v_tag,
uint16_t port,
union sctp_sockstore *over_addr,
uint8_t mflowtype, uint32_t mflowid,
bool use_zero_crc,
int so_locked)
{
struct mbuf *newm;
struct sctphdr *sctphdr;
int packet_length;
int ret;
#if defined(INET) || defined(INET6)
uint32_t vrf_id;
#endif
#if defined(INET) || defined(INET6)
struct mbuf *o_pak;
sctp_route_t *ro = NULL;
struct udphdr *udp = NULL;
#endif
uint8_t tos_value;
if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
sctp_m_freem(m);
return (EFAULT);
}
#if defined(INET) || defined(INET6)
if (stcb) {
vrf_id = stcb->asoc.vrf_id;
} else {
vrf_id = inp->def_vrf_id;
}
#endif
if ((auth != NULL) && (stcb != NULL)) {
sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
}
if (net) {
tos_value = net->dscp;
} else if (stcb) {
tos_value = stcb->asoc.default_dscp;
} else {
tos_value = inp->sctp_ep.default_dscp;
}
switch (to->sa_family) {
#ifdef INET
case AF_INET:
{
struct ip *ip = NULL;
sctp_route_t iproute;
int len;
len = SCTP_MIN_V4_OVERHEAD;
if (port) {
len += sizeof(struct udphdr);
}
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
if (newm == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ALIGN_TO_END(newm, len);
SCTP_BUF_LEN(newm) = len;
SCTP_BUF_NEXT(newm) = m;
m = newm;
if (net != NULL) {
m->m_pkthdr.flowid = net->flowid;
M_HASHTYPE_SET(m, net->flowtype);
} else {
m->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(m, mflowtype);
}
packet_length = sctp_calculate_len(m);
ip = mtod(m, struct ip *);
ip->ip_v = IPVERSION;
ip->ip_hl = (sizeof(struct ip) >> 2);
if (tos_value == 0) {
tos_value = inp->ip_inp.inp.inp_ip_tos;
}
tos_value &= 0xfc;
if (ecn_ok) {
tos_value |= sctp_get_ect(stcb);
}
if ((nofragment_flag) && (port == 0)) {
ip->ip_off = htons(IP_DF);
} else {
ip->ip_off = htons(0);
}
ip_fillid(ip, V_ip_random_id);
ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
ip->ip_len = htons(packet_length);
ip->ip_tos = tos_value;
if (port) {
ip->ip_p = IPPROTO_UDP;
} else {
ip->ip_p = IPPROTO_SCTP;
}
ip->ip_sum = 0;
if (net == NULL) {
ro = &iproute;
memset(&iproute, 0, sizeof(iproute));
memcpy(&ro->ro_dst, to, to->sa_len);
} else {
ro = (sctp_route_t *)&net->ro;
}
ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
if (net && out_of_asoc_ok == 0) {
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
net->src_addr_selected = 0;
RO_NHFREE(ro);
}
if (net->src_addr_selected == 0) {
net->ro._s_addr = sctp_source_address_selection(inp, stcb,
ro, net, 0,
vrf_id);
net->src_addr_selected = 1;
}
if (net->ro._s_addr == NULL) {
net->src_addr_selected = 0;
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
} else {
if (over_addr == NULL) {
struct sctp_ifa *_lsrc;
_lsrc = sctp_source_address_selection(inp, stcb, ro,
net,
out_of_asoc_ok,
vrf_id);
if (_lsrc == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
ip->ip_src = _lsrc->address.sin.sin_addr;
sctp_free_ifa(_lsrc);
} else {
ip->ip_src = over_addr->sin.sin_addr;
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
}
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
} else {
sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
}
sctphdr->src_port = src_port;
sctphdr->dest_port = dest_port;
sctphdr->v_tag = v_tag;
sctphdr->checksum = 0;
if (ro->ro_nh == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
if (ro != &iproute) {
memcpy(&iproute, ro, sizeof(*ro));
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
(uint32_t)(ntohl(ip->ip_src.s_addr)));
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
(uint32_t)(ntohl(ip->ip_dst.s_addr)));
SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
(void *)ro->ro_nh);
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
sctp_m_freem(m);
return (ENOMEM);
}
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
if (port) {
if (use_zero_crc) {
SCTP_STAT_INCR(sctps_sendzerocrc);
} else {
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
}
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
if (use_zero_crc) {
SCTP_STAT_INCR(sctps_sendzerocrc);
} else {
m->m_pkthdr.csum_flags = CSUM_SCTP;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
sctp_packet_log(o_pak);
#endif
SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
SCTP_IP_OUTPUT(ret, o_pak, ro, inp, vrf_id);
if (port) {
UDPSTAT_INC(udps_opackets);
}
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
if (ret)
SCTP_STAT_INCR(sctps_senderrors);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
if (net == NULL) {
RO_NHFREE(ro);
} else {
if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
if (mtu > 0) {
if (net->port) {
mtu -= sizeof(struct udphdr);
}
if (mtu < net->mtu) {
net->mtu = mtu;
if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
sctp_pathmtu_adjustment(stcb, mtu, true);
}
}
}
} else if (ro->ro_nh == NULL) {
if (net->ro._s_addr &&
net->src_addr_selected) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
}
return (ret);
}
#endif
#ifdef INET6
case AF_INET6:
{
uint32_t flowlabel, flowinfo;
struct ip6_hdr *ip6h;
struct route_in6 ip6route;
struct ifnet *ifp;
struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
int prev_scope = 0;
struct sockaddr_in6 lsa6_storage;
int error;
u_short prev_port = 0;
int len;
if (net) {
flowlabel = net->flowlabel;
} else if (stcb) {
flowlabel = stcb->asoc.default_flowlabel;
} else {
flowlabel = inp->sctp_ep.default_flowlabel;
}
if (flowlabel == 0) {
flowlabel = ntohl(((struct inpcb *)inp)->inp_flow);
}
flowlabel &= 0x000fffff;
len = SCTP_MIN_OVERHEAD;
if (port) {
len += sizeof(struct udphdr);
}
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
if (newm == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ALIGN_TO_END(newm, len);
SCTP_BUF_LEN(newm) = len;
SCTP_BUF_NEXT(newm) = m;
m = newm;
if (net != NULL) {
m->m_pkthdr.flowid = net->flowid;
M_HASHTYPE_SET(m, net->flowtype);
} else {
m->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(m, mflowtype);
}
packet_length = sctp_calculate_len(m);
ip6h = mtod(m, struct ip6_hdr *);
sin6 = (struct sockaddr_in6 *)to;
tmp = *sin6;
sin6 = &tmp;
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
sctp_m_freem(m);
return (EINVAL);
}
if (net == NULL) {
memset(&ip6route, 0, sizeof(ip6route));
ro = (sctp_route_t *)&ip6route;
memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
} else {
ro = (sctp_route_t *)&net->ro;
}
if (tos_value == 0) {
tos_value = (ntohl(((struct inpcb *)inp)->inp_flow) >> 20) & 0xff;
}
tos_value &= 0xfc;
if (ecn_ok) {
tos_value |= sctp_get_ect(stcb);
}
flowinfo = 0x06;
flowinfo <<= 8;
flowinfo |= tos_value;
flowinfo <<= 20;
flowinfo |= flowlabel;
ip6h->ip6_flow = htonl(flowinfo);
if (port) {
ip6h->ip6_nxt = IPPROTO_UDP;
} else {
ip6h->ip6_nxt = IPPROTO_SCTP;
}
ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
ip6h->ip6_dst = sin6->sin6_addr;
memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
lsa6_tmp.sin6_family = AF_INET6;
lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
lsa6 = &lsa6_tmp;
if (net && out_of_asoc_ok == 0) {
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
net->src_addr_selected = 0;
RO_NHFREE(ro);
}
if (net->src_addr_selected == 0) {
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
sctp_m_freem(m);
return (EINVAL);
}
net->ro._s_addr = sctp_source_address_selection(inp,
stcb,
ro,
net,
0,
vrf_id);
(void)sa6_recoverscope(sin6);
net->src_addr_selected = 1;
}
if (net->ro._s_addr == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
net->src_addr_selected = 0;
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
} else {
sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
sctp_m_freem(m);
return (EINVAL);
}
if (over_addr == NULL) {
struct sctp_ifa *_lsrc;
_lsrc = sctp_source_address_selection(inp, stcb, ro,
net,
out_of_asoc_ok,
vrf_id);
if (_lsrc == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
sctp_free_ifa(_lsrc);
} else {
lsa6->sin6_addr = over_addr->sin6.sin6_addr;
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
(void)sa6_recoverscope(sin6);
}
lsa6->sin6_port = inp->sctp_lport;
if (ro->ro_nh == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
memset(&lsa6_storage, 0, sizeof(lsa6_storage));
lsa6_storage.sin6_family = AF_INET6;
lsa6_storage.sin6_len = sizeof(lsa6_storage);
lsa6_storage.sin6_addr = lsa6->sin6_addr;
if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
sctp_m_freem(m);
return (error);
}
lsa6_storage.sin6_addr = lsa6->sin6_addr;
lsa6_storage.sin6_port = inp->sctp_lport;
lsa6 = &lsa6_storage;
ip6h->ip6_src = lsa6->sin6_addr;
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
udp->uh_sum = 0;
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
} else {
sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
}
sctphdr->src_port = src_port;
sctphdr->dest_port = dest_port;
sctphdr->v_tag = v_tag;
sctphdr->checksum = 0;
ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
#ifdef SCTP_DEBUG
sin6->sin6_addr = ip6h->ip6_dst;
lsa6->sin6_addr = ip6h->ip6_src;
#endif
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
if (net) {
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
prev_scope = sin6->sin6_scope_id;
prev_port = sin6->sin6_port;
}
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
if (port) {
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
udp->uh_sum = 0xffff;
}
} else {
m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
sctp_packet_log(o_pak);
#endif
SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, inp, vrf_id);
if (net) {
sin6->sin6_scope_id = prev_scope;
sin6->sin6_port = prev_port;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
if (port) {
UDPSTAT_INC(udps_opackets);
}
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
if (ret) {
SCTP_STAT_INCR(sctps_senderrors);
}
if (net == NULL) {
RO_NHFREE(ro);
} else {
if (ro->ro_nh == NULL) {
if (net->ro._s_addr &&
net->src_addr_selected) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
if (mtu > 0) {
if (net->port) {
mtu -= sizeof(struct udphdr);
}
if (mtu < net->mtu) {
net->mtu = mtu;
if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
sctp_pathmtu_adjustment(stcb, mtu, false);
}
}
}
} else if (ifp != NULL) {
if ((ifp->if_inet6->nd_linkmtu > 0) &&
(stcb->asoc.smallest_mtu > ifp->if_inet6->nd_linkmtu)) {
sctp_pathmtu_adjustment(stcb, ifp->if_inet6->nd_linkmtu, false);
}
}
}
return (ret);
}
#endif
default:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
((struct sockaddr *)to)->sa_family);
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return (EFAULT);
}
}
void
sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked)
{
struct mbuf *m, *m_last;
struct sctp_nets *net;
struct sctp_init_chunk *init;
struct sctp_supported_addr_param *sup_addr;
struct sctp_adaptation_layer_indication *ali;
struct sctp_zero_checksum_acceptable *zero_chksum;
struct sctp_supported_chunk_types_param *pr_supported;
struct sctp_paramhdr *ph;
int cnt_inits_to = 0;
int error;
uint16_t num_ext, chunk_len, padding_len, parameter_len;
net = stcb->asoc.primary_destination;
if (net == NULL) {
net = TAILQ_FIRST(&stcb->asoc.nets);
if (net == NULL) {
return;
}
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
(void)sctp_set_primary_addr(stcb, NULL, net);
} else {
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
}
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
#ifdef INET6
if (net->ro._l_addr.sa.sa_family == AF_INET6) {
if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
cnt_inits_to = 1;
}
#endif
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
return;
}
sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
if (m == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
return;
}
chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
padding_len = 0;
init = mtod(m, struct sctp_init_chunk *);
init->ch.chunk_type = SCTP_INITIATION;
init->ch.chunk_flags = 0;
init->ch.chunk_length = 0;
init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
SCTP_MINIMAL_RWND));
init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
ali->ph.param_length = htons(parameter_len);
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
chunk_len += parameter_len;
}
if (stcb->asoc.ecn_supported == 1) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_ECN_CAPABLE);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
if (stcb->asoc.prsctp_supported == 1) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
if (stcb->asoc.rcv_edmid != SCTP_EDMID_NONE) {
parameter_len = (uint16_t)sizeof(struct sctp_zero_checksum_acceptable);
zero_chksum = (struct sctp_zero_checksum_acceptable *)(mtod(m, caddr_t)+chunk_len);
zero_chksum->ph.param_type = htons(SCTP_ZERO_CHECKSUM_ACCEPTABLE);
zero_chksum->ph.param_length = htons(parameter_len);
zero_chksum->edmid = htonl(stcb->asoc.rcv_edmid);
chunk_len += parameter_len;
}
if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
num_ext = 0;
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
if (stcb->asoc.prsctp_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
if (stcb->asoc.idata_supported) {
pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
}
}
if (stcb->asoc.auth_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
}
if (stcb->asoc.asconf_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
}
if (stcb->asoc.reconfig_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
}
if (stcb->asoc.idata_supported) {
pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
}
if (stcb->asoc.nrsack_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
}
if (stcb->asoc.pktdrop_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
if (num_ext > 0) {
parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
pr_supported->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
if (stcb->asoc.auth_supported) {
if (stcb->asoc.authinfo.random != NULL) {
struct sctp_auth_random *randp;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
if (stcb->asoc.local_hmacs != NULL) {
struct sctp_auth_hmac_algo *hmacs;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
hmacs->ph.param_length = htons(parameter_len);
sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
if (stcb->asoc.local_auth_chunks != NULL) {
struct sctp_auth_chunk_list *chunks;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
chunks->ph.param_length = htons(parameter_len);
sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
}
if (stcb->asoc.cookie_preserve_req > 0) {
struct sctp_cookie_perserve_param *cookie_preserve;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
cookie_preserve->ph.param_length = htons(parameter_len);
cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
stcb->asoc.cookie_preserve_req = 0;
chunk_len += parameter_len;
}
if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
uint8_t i;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
if (stcb->asoc.scope.ipv4_addr_legal) {
parameter_len += (uint16_t)sizeof(uint16_t);
}
if (stcb->asoc.scope.ipv6_addr_legal) {
parameter_len += (uint16_t)sizeof(uint16_t);
}
sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
sup_addr->ph.param_length = htons(parameter_len);
i = 0;
if (stcb->asoc.scope.ipv4_addr_legal) {
sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
}
if (stcb->asoc.scope.ipv6_addr_legal) {
sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
}
padding_len = 4 - 2 * i;
chunk_len += parameter_len;
}
SCTP_BUF_LEN(m) = chunk_len;
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
m, cnt_inits_to,
&padding_len, &chunk_len);
init->ch.chunk_length = htons(chunk_len);
if (padding_len > 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(m);
return;
}
}
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m, 0, NULL, 0, 0, 0, 0,
inp->sctp_lport, stcb->rport, htonl(0),
net->port, NULL,
0, 0,
false, so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
}
struct mbuf *
sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
int param_offset, int *abort_processing,
struct sctp_chunkhdr *cp,
int *nat_friendly,
int *cookie_found,
uint32_t *edmid)
{
struct sctp_zero_checksum_acceptable zero_chksum, *zero_chksum_p;
struct sctp_paramhdr *phdr, params;
struct mbuf *mat, *m_tmp, *op_err, *op_err_last;
int at, limit, pad_needed;
uint16_t ptype, plen, padded_size;
*abort_processing = 0;
if (cookie_found != NULL) {
*cookie_found = 0;
}
if (edmid != NULL) {
*edmid = SCTP_EDMID_NONE;
}
mat = in_initpkt;
limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
at = param_offset;
op_err = NULL;
op_err_last = NULL;
pad_needed = 0;
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
goto invalid_size;
}
limit -= SCTP_SIZE32(plen);
padded_size = SCTP_SIZE32(plen);
switch (ptype) {
case SCTP_HEARTBEAT_INFO:
case SCTP_UNRECOG_PARAM:
case SCTP_ERROR_CAUSE_IND:
at += padded_size;
break;
case SCTP_STATE_COOKIE:
if (cookie_found != NULL) {
*cookie_found = 1;
}
at += padded_size;
break;
case SCTP_CHUNK_LIST:
case SCTP_SUPPORTED_CHUNK_EXT:
if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SUPPORTED_ADDRTYPE:
if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_ZERO_CHECKSUM_ACCEPTABLE:
if (padded_size != sizeof(struct sctp_zero_checksum_acceptable)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error checksum acceptable %d\n", plen);
goto invalid_size;
}
if (edmid != NULL) {
phdr = sctp_get_next_param(mat, at,
(struct sctp_paramhdr *)&zero_chksum,
sizeof(struct sctp_zero_checksum_acceptable));
if (phdr != NULL) {
zero_chksum_p = (struct sctp_zero_checksum_acceptable *)phdr;
*edmid = ntohl(zero_chksum_p->edmid);
}
}
at += padded_size;
break;
case SCTP_RANDOM:
if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SET_PRIM_ADDR:
case SCTP_DEL_IP_ADDRESS:
case SCTP_ADD_IP_ADDRESS:
if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
(padded_size != sizeof(struct sctp_asconf_addr_param))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_IPV4_ADDRESS:
if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_IPV6_ADDRESS:
if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_COOKIE_PRESERVE:
if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_HAS_NAT_SUPPORT:
if (padded_size != sizeof(struct sctp_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error nat support %d\n", plen);
goto invalid_size;
}
*nat_friendly = 1;
at += padded_size;
break;
case SCTP_PRSCTP_SUPPORTED:
if (padded_size != sizeof(struct sctp_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_ECN_CAPABLE:
if (padded_size != sizeof(struct sctp_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_ULP_ADAPTATION:
if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SUCCESS_REPORT:
if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_HOSTNAME_ADDRESS:
{
struct sctp_gen_error_cause *cause;
int l_len;
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
*abort_processing = 1;
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += sizeof(struct sctp_gen_error_cause);
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err != NULL) {
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
cause = mtod(op_err, struct sctp_gen_error_cause *);
cause->code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
cause->length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
if (SCTP_BUF_NEXT(op_err) == NULL) {
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
}
}
return (op_err);
}
default:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
if ((ptype & 0x4000) == 0x4000) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
if (op_err == NULL) {
int l_len;
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += sizeof(struct sctp_paramhdr);
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err) {
SCTP_BUF_LEN(op_err) = 0;
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
op_err_last = op_err;
}
}
if (op_err != NULL) {
struct sctp_paramhdr *param;
if (pad_needed > 0) {
op_err_last = sctp_add_pad_tombuf(op_err_last, pad_needed);
}
if (op_err_last == NULL) {
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
goto more_processing;
}
if (M_TRAILINGSPACE(op_err_last) < (int)sizeof(struct sctp_paramhdr)) {
m_tmp = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
if (m_tmp == NULL) {
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
goto more_processing;
}
SCTP_BUF_LEN(m_tmp) = 0;
SCTP_BUF_NEXT(m_tmp) = NULL;
SCTP_BUF_NEXT(op_err_last) = m_tmp;
op_err_last = m_tmp;
}
param = (struct sctp_paramhdr *)(mtod(op_err_last, caddr_t)+SCTP_BUF_LEN(op_err_last));
param->param_type = htons(SCTP_UNRECOG_PARAM);
param->param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
SCTP_BUF_LEN(op_err_last) += sizeof(struct sctp_paramhdr);
SCTP_BUF_NEXT(op_err_last) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
if (SCTP_BUF_NEXT(op_err_last) == NULL) {
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
goto more_processing;
} else {
while (SCTP_BUF_NEXT(op_err_last) != NULL) {
op_err_last = SCTP_BUF_NEXT(op_err_last);
}
}
if (plen % 4 != 0) {
pad_needed = 4 - (plen % 4);
} else {
pad_needed = 0;
}
}
}
more_processing:
if ((ptype & 0x8000) == 0x0000) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
return (op_err);
} else {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
at += SCTP_SIZE32(plen);
}
break;
}
phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
}
return (op_err);
invalid_size:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
*abort_processing = 1;
sctp_m_freem(op_err);
op_err = NULL;
op_err_last = NULL;
if (phdr != NULL) {
struct sctp_paramhdr *param;
int l_len;
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += (2 * sizeof(struct sctp_paramhdr));
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err) {
SCTP_BUF_LEN(op_err) = 0;
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
SCTP_BUF_LEN(op_err) = 2 * sizeof(struct sctp_paramhdr);
param = mtod(op_err, struct sctp_paramhdr *);
param->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
param->param_length = htons(2 * sizeof(struct sctp_paramhdr));
param++;
param->param_type = htons(ptype);
param->param_length = htons(plen);
}
}
return (op_err);
}
static bool
sctp_are_there_new_addresses(struct sctp_association *asoc,
struct mbuf *in_initpkt, int offset, int limit, struct sockaddr *src,
struct mbuf **op_err)
{
struct sockaddr *sa_touse;
struct sockaddr *sa;
struct sctp_paramhdr *phdr, params;
struct sctp_nets *net;
#ifdef INET
struct sockaddr_in sin4, *sa4;
#endif
#ifdef INET6
struct sockaddr_in6 sin6, *sa6;
#endif
uint16_t ptype, plen;
bool fnd, check_src;
*op_err = NULL;
#ifdef INET
memset(&sin4, 0, sizeof(sin4));
sin4.sin_family = AF_INET;
sin4.sin_len = sizeof(sin4);
#endif
#ifdef INET6
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(sin6);
#endif
check_src = false;
switch (src->sa_family) {
#ifdef INET
case AF_INET:
if (asoc->scope.ipv4_addr_legal) {
check_src = true;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (asoc->scope.ipv6_addr_legal) {
check_src = true;
}
break;
#endif
default:
break;
}
if (check_src) {
fnd = false;
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
sa = (struct sockaddr *)&net->ro._l_addr;
if (sa->sa_family == src->sa_family) {
#ifdef INET
if (sa->sa_family == AF_INET) {
struct sockaddr_in *src4;
sa4 = (struct sockaddr_in *)sa;
src4 = (struct sockaddr_in *)src;
if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
fnd = true;
break;
}
}
#endif
#ifdef INET6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *src6;
sa6 = (struct sockaddr_in6 *)sa;
src6 = (struct sockaddr_in6 *)src;
if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
fnd = true;
break;
}
}
#endif
}
}
if (!fnd) {
*op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), "Address added");
return (true);
}
}
offset += sizeof(struct sctp_init_chunk);
phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
while (phdr) {
sa_touse = NULL;
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
if (offset + plen > limit) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Partial parameter");
return (true);
}
if (plen < sizeof(struct sctp_paramhdr)) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length too small");
return (true);
}
switch (ptype) {
#ifdef INET
case SCTP_IPV4_ADDRESS:
{
struct sctp_ipv4addr_param *p4, p4_buf;
if (plen != sizeof(struct sctp_ipv4addr_param)) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length illegal");
return (true);
}
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
if (phdr == NULL) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "");
return (true);
}
if (asoc->scope.ipv4_addr_legal) {
p4 = (struct sctp_ipv4addr_param *)phdr;
sin4.sin_addr.s_addr = p4->addr;
sa_touse = (struct sockaddr *)&sin4;
}
break;
}
#endif
#ifdef INET6
case SCTP_IPV6_ADDRESS:
{
struct sctp_ipv6addr_param *p6, p6_buf;
if (plen != sizeof(struct sctp_ipv6addr_param)) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length illegal");
return (true);
}
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
if (phdr == NULL) {
*op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "");
return (true);
}
if (asoc->scope.ipv6_addr_legal) {
p6 = (struct sctp_ipv6addr_param *)phdr;
memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
sizeof(p6->addr));
sa_touse = (struct sockaddr *)&sin6;
}
break;
}
#endif
default:
sa_touse = NULL;
break;
}
if (sa_touse) {
fnd = false;
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
sa = (struct sockaddr *)&net->ro._l_addr;
if (sa->sa_family != sa_touse->sa_family) {
continue;
}
#ifdef INET
if (sa->sa_family == AF_INET) {
sa4 = (struct sockaddr_in *)sa;
if (sa4->sin_addr.s_addr ==
sin4.sin_addr.s_addr) {
fnd = true;
break;
}
}
#endif
#ifdef INET6
if (sa->sa_family == AF_INET6) {
sa6 = (struct sockaddr_in6 *)sa;
if (SCTP6_ARE_ADDR_EQUAL(
sa6, &sin6)) {
fnd = true;
break;
}
}
#endif
}
if (!fnd) {
*op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), "Address added");
return (true);
}
}
offset += SCTP_SIZE32(plen);
if (offset >= limit) {
break;
}
phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
}
return (false);
}
void
sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *src_net, struct mbuf *init_pkt,
int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_init_chunk *init_chk,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_association *asoc;
struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
struct sctp_init_ack_chunk *initack;
struct sctp_adaptation_layer_indication *ali;
struct sctp_zero_checksum_acceptable *zero_chksum;
struct sctp_supported_chunk_types_param *pr_supported;
struct sctp_paramhdr *ph;
union sctp_sockstore *over_addr;
struct sctp_scoping scp;
struct timeval now;
#ifdef INET
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
struct sockaddr_in *src4 = (struct sockaddr_in *)src;
struct sockaddr_in *sin;
#endif
#ifdef INET6
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
struct sockaddr_in6 *sin6;
#endif
struct sockaddr *to;
struct sctp_state_cookie stc;
struct sctp_nets *net = NULL;
uint8_t *signature = NULL;
int cnt_inits_to = 0;
uint16_t his_limit, i_want;
int abort_flag;
int nat_friendly = 0;
int error;
struct socket *so;
uint32_t edmid;
uint16_t num_ext, chunk_len, padding_len, parameter_len;
bool use_zero_crc;
if (stcb) {
asoc = &stcb->asoc;
} else {
asoc = NULL;
}
if ((asoc != NULL) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
if (sctp_are_there_new_addresses(asoc, init_pkt, offset, offset + ntohs(init_chk->ch.chunk_length), src, &op_err)) {
sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return;
}
if (src_net != NULL && (src_net->port != port)) {
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Remote encapsulation port changed");
sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return;
}
}
abort_flag = 0;
op_err = sctp_arethere_unrecognized_parameters(init_pkt,
(offset + sizeof(struct sctp_init_chunk)),
&abort_flag,
(struct sctp_chunkhdr *)init_chk,
&nat_friendly, NULL, &edmid);
if (abort_flag) {
do_a_abort:
if (op_err == NULL) {
char msg[SCTP_DIAG_INFO_LEN];
SCTP_SNPRINTF(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
}
sctp_send_abort(init_pkt, iphlen, src, dst, sh,
init_chk->init.initiate_tag, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return;
}
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (m == NULL) {
sctp_m_freem(op_err);
return;
}
chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
padding_len = 0;
memset(&stc, 0, sizeof(struct sctp_state_cookie));
(void)SCTP_GETTIME_TIMEVAL(&now);
stc.time_entered.tv_sec = now.tv_sec;
stc.time_entered.tv_usec = now.tv_usec;
if (asoc != NULL) {
stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
stc.cookie_life = asoc->cookie_life;
net = asoc->primary_destination;
} else {
stc.tie_tag_my_vtag = 0;
stc.tie_tag_peer_vtag = 0;
stc.cookie_life = inp->sctp_ep.def_cookie_life;
}
stc.myport = sh->dest_port;
stc.peerport = sh->src_port;
stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
stc.ipv6_addr_legal = 1;
if (SCTP_IPV6_V6ONLY(inp)) {
stc.ipv4_addr_legal = 0;
} else {
stc.ipv4_addr_legal = 1;
}
} else {
stc.ipv6_addr_legal = 0;
stc.ipv4_addr_legal = 1;
}
stc.ipv4_scope = 0;
if (net == NULL) {
to = src;
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
{
stc.address[0] = src4->sin_addr.s_addr;
stc.address[1] = 0;
stc.address[2] = 0;
stc.address[3] = 0;
stc.addr_type = SCTP_IPV4_ADDRESS;
stc.laddress[0] = dst4->sin_addr.s_addr;
stc.laddress[1] = 0;
stc.laddress[2] = 0;
stc.laddress[3] = 0;
stc.laddr_type = SCTP_IPV4_ADDRESS;
stc.scope_id = 0;
if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
(IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
stc.ipv4_scope = 1;
}
if (sctp_is_address_on_local_host(src, vrf_id)) {
stc.loopback_scope = 1;
stc.ipv4_scope = 1;
stc.site_scope = 1;
stc.local_scope = 0;
}
break;
}
#endif
#ifdef INET6
case AF_INET6:
{
stc.addr_type = SCTP_IPV6_ADDRESS;
memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
if (sctp_is_address_on_local_host(src, vrf_id)) {
stc.loopback_scope = 1;
stc.local_scope = 0;
stc.site_scope = 1;
stc.ipv4_scope = 1;
} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
stc.local_scope = 0;
stc.site_scope = 1;
stc.ipv4_scope = 1;
cnt_inits_to = 1;
} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
stc.site_scope = 1;
}
memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
stc.laddr_type = SCTP_IPV6_ADDRESS;
break;
}
#endif
default:
goto do_a_abort;
break;
}
} else {
#ifdef INET6
struct sctp_nets *lnet;
#endif
stc.loopback_scope = asoc->scope.loopback_scope;
stc.ipv4_scope = asoc->scope.ipv4_local_scope;
stc.site_scope = asoc->scope.site_scope;
stc.local_scope = asoc->scope.local_scope;
#ifdef INET6
TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
cnt_inits_to = 1;
}
}
}
#endif
to = (struct sockaddr *)&net->ro._l_addr;
switch (to->sa_family) {
#ifdef INET
case AF_INET:
sin = (struct sockaddr_in *)to;
stc.address[0] = sin->sin_addr.s_addr;
stc.address[1] = 0;
stc.address[2] = 0;
stc.address[3] = 0;
stc.addr_type = SCTP_IPV4_ADDRESS;
if (net->src_addr_selected == 0) {
net->ro._s_addr = sctp_source_address_selection(inp,
stcb, (sctp_route_t *)&net->ro,
net, 0, vrf_id);
if (net->ro._s_addr == NULL) {
sctp_m_freem(op_err);
sctp_m_freem(m);
return;
}
net->src_addr_selected = 1;
}
stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
stc.laddress[1] = 0;
stc.laddress[2] = 0;
stc.laddress[3] = 0;
stc.laddr_type = SCTP_IPV4_ADDRESS;
stc.scope_id = 0;
break;
#endif
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)to;
memcpy(&stc.address, &sin6->sin6_addr,
sizeof(struct in6_addr));
stc.addr_type = SCTP_IPV6_ADDRESS;
stc.scope_id = sin6->sin6_scope_id;
if (net->src_addr_selected == 0) {
net->ro._s_addr = sctp_source_address_selection(inp,
stcb, (sctp_route_t *)&net->ro,
net, 0, vrf_id);
if (net->ro._s_addr == NULL) {
sctp_m_freem(op_err);
sctp_m_freem(m);
return;
}
net->src_addr_selected = 1;
}
memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
sizeof(struct in6_addr));
stc.laddr_type = SCTP_IPV6_ADDRESS;
break;
#endif
}
}
if (asoc != NULL) {
stc.rcv_edmid = asoc->rcv_edmid;
} else {
stc.rcv_edmid = inp->rcv_edmid;
}
initack = mtod(m, struct sctp_init_ack_chunk *);
stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
memcpy(stc.identification, SCTP_VERSION_STRING,
min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
initack->ch.chunk_type = SCTP_INITIATION_ACK;
initack->ch.chunk_flags = 0;
initack->ch.chunk_length = 0;
if ((asoc != NULL) &&
((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
initack->init.initiate_tag = htonl(asoc->my_vtag);
initack->init.initial_tsn = htonl(asoc->init_seq_number);
} else {
uint32_t vtag, itsn;
if (asoc) {
atomic_add_int(&asoc->refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
new_tag:
SCTP_INP_INFO_RLOCK();
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
SCTP_INP_INFO_RUNLOCK();
if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
goto new_tag;
}
initack->init.initiate_tag = htonl(vtag);
itsn = sctp_select_initial_TSN(&inp->sctp_ep);
initack->init.initial_tsn = htonl(itsn);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&asoc->refcnt, 1);
} else {
SCTP_INP_INCR_REF(inp);
SCTP_INP_RUNLOCK(inp);
SCTP_INP_INFO_RLOCK();
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
SCTP_INP_INFO_RUNLOCK();
initack->init.initiate_tag = htonl(vtag);
initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
SCTP_INP_RLOCK(inp);
SCTP_INP_DECR_REF(inp);
}
}
stc.my_vtag = initack->init.initiate_tag;
so = inp->sctp_socket;
if (so == NULL) {
sctp_m_freem(op_err);
sctp_m_freem(m);
return;
} else {
initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
}
his_limit = ntohs(init_chk->init.num_inbound_streams);
if (asoc != NULL) {
if (asoc->streamoutcnt > asoc->pre_open_streams) {
i_want = asoc->streamoutcnt;
} else {
i_want = asoc->pre_open_streams;
}
} else {
i_want = inp->sctp_ep.pre_open_stream_count;
}
if (his_limit < i_want) {
initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
} else {
initack->init.num_outbound_streams = htons(i_want);
}
initack->init.num_inbound_streams =
htons(inp->sctp_ep.max_open_streams_intome);
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
ali->ph.param_length = htons(parameter_len);
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
chunk_len += parameter_len;
}
if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
((asoc == NULL) && (inp->ecn_supported == 1))) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_ECN_CAPABLE);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
((asoc == NULL) && (inp->prsctp_supported == 1))) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
if (((asoc != NULL) && (asoc->rcv_edmid != SCTP_EDMID_NONE)) ||
((asoc == NULL) && (inp->rcv_edmid != SCTP_EDMID_NONE))) {
parameter_len = (uint16_t)sizeof(struct sctp_zero_checksum_acceptable);
zero_chksum = (struct sctp_zero_checksum_acceptable *)(mtod(m, caddr_t)+chunk_len);
zero_chksum->ph.param_type = htons(SCTP_ZERO_CHECKSUM_ACCEPTABLE);
zero_chksum->ph.param_length = htons(parameter_len);
if (asoc != NULL) {
zero_chksum->edmid = htonl(asoc->rcv_edmid);
} else {
zero_chksum->edmid = htonl(inp->rcv_edmid);
}
chunk_len += parameter_len;
}
if (nat_friendly) {
parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
num_ext = 0;
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
((asoc == NULL) && (inp->prsctp_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
((asoc == NULL) && (inp->idata_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
}
}
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
((asoc == NULL) && (inp->auth_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
}
if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
((asoc == NULL) && (inp->asconf_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
}
if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
((asoc == NULL) && (inp->reconfig_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
}
if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
((asoc == NULL) && (inp->idata_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
}
if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
((asoc == NULL) && (inp->nrsack_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
}
if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
((asoc == NULL) && (inp->pktdrop_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
if (num_ext > 0) {
parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
pr_supported->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
((asoc == NULL) && (inp->auth_supported == 1))) {
struct sctp_auth_random *randp;
struct sctp_auth_hmac_algo *hmacs;
struct sctp_auth_chunk_list *chunks;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
SCTP_AUTH_RANDOM_SIZE_DEFAULT;
randp->ph.param_type = htons(SCTP_RANDOM);
randp->ph.param_length = htons(parameter_len);
SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
(uint8_t *)hmacs->hmac_ids);
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
hmacs->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
chunks->chunk_types);
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
chunks->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
SCTP_BUF_LEN(m) = chunk_len;
m_last = m;
scp.ipv4_addr_legal = stc.ipv4_addr_legal;
scp.ipv6_addr_legal = stc.ipv6_addr_legal;
scp.loopback_scope = stc.loopback_scope;
scp.ipv4_local_scope = stc.ipv4_scope;
scp.local_scope = stc.local_scope;
scp.site_scope = stc.site_scope;
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
cnt_inits_to,
&padding_len, &chunk_len);
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
SCTP_BUF_LEN(m) += padding_len;
padding_len = 0;
}
if (op_err) {
parameter_len = 0;
for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
parameter_len += SCTP_BUF_LEN(m_tmp);
}
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
SCTP_BUF_NEXT(m_last) = op_err;
while (SCTP_BUF_NEXT(m_last) != NULL) {
m_last = SCTP_BUF_NEXT(m_last);
}
chunk_len += parameter_len;
}
if (padding_len > 0) {
m_last = sctp_add_pad_tombuf(m_last, padding_len);
if (m_last == NULL) {
sctp_m_freem(m);
return;
}
chunk_len += padding_len;
padding_len = 0;
}
m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
if (m_cookie == NULL) {
sctp_m_freem(m);
return;
}
SCTP_BUF_NEXT(m_last) = m_cookie;
parameter_len = 0;
for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
parameter_len += SCTP_BUF_LEN(m_tmp);
if (SCTP_BUF_NEXT(m_tmp) == NULL) {
m_last = m_tmp;
}
}
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
initack->ch.chunk_length = htons(chunk_len);
(void)sctp_hmac_m(SCTP_HMAC,
(uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
(uint8_t *)signature, SCTP_SIGNATURE_SIZE);
if (padding_len > 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(m);
return;
}
}
if (stc.loopback_scope) {
over_addr = (union sctp_sockstore *)dst;
} else {
over_addr = NULL;
}
if (asoc != NULL) {
use_zero_crc = (asoc->rcv_edmid != SCTP_EDMID_NONE) && (asoc->rcv_edmid == edmid);
} else {
use_zero_crc = (inp->rcv_edmid != SCTP_EDMID_NONE) && (inp->rcv_edmid == edmid);
}
if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
0, 0,
inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
port, over_addr,
mflowtype, mflowid,
use_zero_crc,
SCTP_SO_NOT_LOCKED))) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
if (error == ENOBUFS) {
if (asoc != NULL) {
asoc->ifp_had_enobuf = 1;
}
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
if (asoc != NULL) {
asoc->ifp_had_enobuf = 0;
}
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
static void
sctp_prune_prsctp(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_nonpad_sndrcvinfo *srcv,
int dataout)
{
int freed_spc = 0;
struct sctp_tmit_chunk *chk, *nchk;
SCTP_TCB_LOCK_ASSERT(stcb);
if ((asoc->prsctp_supported) &&
(asoc->sent_queue_cnt_removeable > 0)) {
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
if (chk->data) {
int ret_spc;
uint8_t sent;
if (chk->sent > SCTP_DATAGRAM_UNSENT)
sent = 1;
else
sent = 0;
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
sent,
SCTP_SO_LOCKED);
freed_spc += ret_spc;
if (freed_spc >= dataout) {
return;
}
}
}
}
}
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
if (chk->data) {
int ret_spc;
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
0, SCTP_SO_LOCKED);
freed_spc += ret_spc;
if (freed_spc >= dataout) {
return;
}
}
}
}
}
}
}
uint32_t
sctp_get_frag_point(struct sctp_tcb *stcb)
{
struct sctp_association *asoc;
uint32_t frag_point, overhead;
asoc = &stcb->asoc;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
overhead = SCTP_MIN_OVERHEAD;
} else {
overhead = SCTP_MIN_V4_OVERHEAD;
}
if (asoc->idata_supported) {
overhead += sizeof(struct sctp_idata_chunk);
if (sctp_auth_is_required_chunk(SCTP_IDATA, asoc->peer_auth_chunks)) {
overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id);
}
} else {
overhead += sizeof(struct sctp_data_chunk);
if (sctp_auth_is_required_chunk(SCTP_DATA, asoc->peer_auth_chunks)) {
overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id);
}
}
KASSERT(overhead % 4 == 0,
("overhead (%u) not a multiple of 4", overhead));
if (asoc->smallest_mtu % 4 > 0) {
overhead += (asoc->smallest_mtu % 4);
}
KASSERT(asoc->smallest_mtu > overhead,
("Association MTU (%u) too small for overhead (%u)",
asoc->smallest_mtu, overhead));
frag_point = asoc->smallest_mtu - overhead;
KASSERT(frag_point % 4 == 0,
("frag_point (%u) not a multiple of 4", frag_point));
if ((asoc->sctp_frag_point > 0) &&
(asoc->sctp_frag_point < frag_point)) {
frag_point = asoc->sctp_frag_point;
}
return (frag_point);
}
static void
sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
{
if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
} else if (sp->timetolive > 0) {
sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
} else {
return;
}
switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
case CHUNK_FLAGS_PR_SCTP_BUF:
sp->ts.tv_sec = sp->timetolive;
sp->ts.tv_usec = 0;
break;
case CHUNK_FLAGS_PR_SCTP_TTL:
{
struct timeval tv;
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
tv.tv_sec = sp->timetolive / 1000;
tv.tv_usec = (sp->timetolive * 1000) % 1000000;
timevaladd(&sp->ts, &tv);
}
break;
case CHUNK_FLAGS_PR_SCTP_RTX:
sp->ts.tv_sec = sp->timetolive;
sp->ts.tv_usec = 0;
break;
default:
SCTPDBG(SCTP_DEBUG_USRREQ1,
"Unknown PR_SCTP policy %u.\n",
PR_SCTP_POLICY(sp->sinfo_flags));
break;
}
}
static int
sctp_msg_append(struct sctp_tcb *stcb,
struct sctp_nets *net,
struct mbuf *m,
struct sctp_nonpad_sndrcvinfo *srcv)
{
int error = 0;
struct mbuf *at;
struct sctp_stream_queue_pending *sp = NULL;
struct sctp_stream_out *strm;
SCTP_TCB_LOCK_ASSERT(stcb);
if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_now;
}
if ((stcb->asoc.stream_locked) &&
(stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_now;
}
if ((stcb->asoc.strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
(stcb->asoc.strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
if (stcb->asoc.strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
error = EAGAIN;
} else {
error = EINVAL;
}
goto out_now;
}
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EPIPE);
error = EPIPE;
goto out_now;
}
sctp_alloc_a_strmoq(stcb, sp);
if (sp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
error = ENOMEM;
goto out_now;
}
sp->sinfo_flags = srcv->sinfo_flags;
sp->timetolive = srcv->sinfo_timetolive;
sp->ppid = srcv->sinfo_ppid;
sp->context = srcv->sinfo_context;
sp->fsn = 0;
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
sp->net = net;
atomic_add_int(&sp->net->ref_count, 1);
} else {
sp->net = NULL;
}
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
sp->sid = srcv->sinfo_stream;
sp->msg_is_complete = 1;
sp->sender_all_done = 1;
sp->some_taken = 0;
sp->data = m;
sp->tail_mbuf = NULL;
sctp_set_prsctp_policy(sp);
sp->length = 0;
for (at = m; at; at = SCTP_BUF_NEXT(at)) {
if (SCTP_BUF_NEXT(at) == NULL)
sp->tail_mbuf = at;
sp->length += SCTP_BUF_LEN(at);
}
if (srcv->sinfo_keynumber_valid) {
sp->auth_keyid = srcv->sinfo_keynumber;
} else {
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
}
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
sctp_auth_key_acquire(stcb, sp->auth_keyid);
sp->holds_key_ref = 1;
}
strm = &stcb->asoc.strmout[srcv->sinfo_stream];
sctp_snd_sb_alloc(stcb, sp->length);
atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp);
m = NULL;
out_now:
if (m) {
sctp_m_freem(m);
}
return (error);
}
static struct mbuf *
sctp_copy_mbufchain(struct mbuf *clonechain,
struct mbuf *outchain,
struct mbuf **endofchain,
int can_take_mbuf,
int sizeofcpy,
uint8_t copy_by_ref)
{
struct mbuf *m;
struct mbuf *appendchain;
caddr_t cp;
int len;
if (endofchain == NULL) {
error_out:
if (outchain)
sctp_m_freem(outchain);
return (NULL);
}
if (can_take_mbuf) {
appendchain = clonechain;
} else {
if (!copy_by_ref &&
(sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))) {
if (*endofchain == NULL) {
if (outchain == NULL) {
new_mbuf:
outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
if (outchain == NULL) {
goto error_out;
}
SCTP_BUF_LEN(outchain) = 0;
*endofchain = outchain;
SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
} else {
m = outchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
if (*endofchain == NULL) {
sctp_m_freem(outchain);
goto new_mbuf;
}
}
len = (int)M_TRAILINGSPACE(*endofchain);
} else {
len = (int)M_TRAILINGSPACE(*endofchain);
}
cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
if (len >= sizeofcpy) {
m_copydata(clonechain, 0, sizeofcpy, cp);
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
} else {
if (len > 0) {
m_copydata(clonechain, 0, len, cp);
SCTP_BUF_LEN((*endofchain)) += len;
sizeofcpy -= len;
}
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
if (m == NULL) {
goto error_out;
}
SCTP_BUF_NEXT((*endofchain)) = m;
*endofchain = m;
cp = mtod((*endofchain), caddr_t);
m_copydata(clonechain, len, sizeofcpy, cp);
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
}
return (outchain);
} else {
appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
}
#endif
}
}
if (appendchain == NULL) {
if (outchain)
sctp_m_freem(outchain);
return (NULL);
}
if (outchain) {
if (*endofchain != NULL) {
SCTP_BUF_NEXT(((*endofchain))) = appendchain;
} else {
m = outchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
SCTP_BUF_NEXT(m) = appendchain;
break;
}
m = SCTP_BUF_NEXT(m);
}
}
m = appendchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
return (outchain);
} else {
m = appendchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
return (appendchain);
}
}
static int
sctp_med_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *num_out,
int *reason_code,
int control_only, int from_where,
struct timeval *now, int *now_filled,
uint32_t frag_point, int so_locked);
static void
sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
uint32_t val SCTP_UNUSED)
{
struct sctp_copy_all *ca;
struct mbuf *m;
int ret = 0;
int added_control = 0;
int un_sent, do_chunk_output = 1;
struct sctp_association *asoc;
struct sctp_nets *net;
ca = (struct sctp_copy_all *)ptr;
if (ca->m == NULL) {
return;
}
if (ca->inp != inp) {
return;
}
if (ca->sndlen > 0) {
m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
if (m == NULL) {
ca->cnt_failed++;
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m, SCTP_MBUF_ICOPY);
}
#endif
} else {
m = NULL;
}
SCTP_TCB_LOCK_ASSERT(stcb);
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
if (m != NULL) {
SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
} else {
m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
0, M_NOWAIT, 1, MT_DATA);
if (m != NULL) {
SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
}
}
if (m != NULL) {
struct sctp_paramhdr *ph;
ph = mtod(m, struct sctp_paramhdr *);
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
}
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(inp, stcb, m, false, SCTP_SO_NOT_LOCKED);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
goto no_chunk_output;
} else {
if (m != NULL) {
ret = sctp_msg_append(stcb, net, m, &ca->sndrcv);
}
asoc = &stcb->asoc;
if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
goto abort_anyway;
}
if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
sctp_stop_timers_for_shutdown(stcb);
sctp_send_shutdown(stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
NULL);
added_control = 1;
do_chunk_output = 0;
}
} else {
if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
}
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
abort_anyway:
SCTP_SNPRINTF(msg, sizeof(msg),
"%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(stcb->sctp_ep, stcb,
op_err, false, SCTP_SO_NOT_LOCKED);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
goto no_chunk_output;
}
}
}
}
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
do_chunk_output = 0;
}
if (do_chunk_output)
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
else if (added_control) {
struct timeval now;
int num_out, reason, now_filled = 0;
(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
&reason, 1, 1, &now, &now_filled,
sctp_get_frag_point(stcb),
SCTP_SO_NOT_LOCKED);
}
no_chunk_output:
if (ret) {
ca->cnt_failed++;
} else {
ca->cnt_sent++;
}
}
static void
sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
{
struct sctp_copy_all *ca;
ca = (struct sctp_copy_all *)ptr;
if (ca->inp) {
SCTP_INP_WLOCK(ca->inp);
ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
SCTP_INP_WUNLOCK(ca->inp);
}
sctp_m_freem(ca->m);
SCTP_FREE(ca, SCTP_M_COPYAL);
}
static struct mbuf *
sctp_copy_out_all(struct uio *uio, ssize_t len)
{
struct mbuf *ret, *at;
ssize_t left, willcpy, cancpy, error;
ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
if (ret == NULL) {
return (NULL);
}
left = len;
SCTP_BUF_LEN(ret) = 0;
cancpy = (int)M_TRAILINGSPACE(ret);
willcpy = min(cancpy, left);
at = ret;
while (left > 0) {
error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
if (error) {
err_out_now:
sctp_m_freem(at);
return (NULL);
}
SCTP_BUF_LEN(at) = (int)willcpy;
SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
left -= willcpy;
if (left > 0) {
SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
if (SCTP_BUF_NEXT(at) == NULL) {
goto err_out_now;
}
at = SCTP_BUF_NEXT(at);
SCTP_BUF_LEN(at) = 0;
cancpy = (int)M_TRAILINGSPACE(at);
willcpy = min(cancpy, left);
}
}
return (ret);
}
static int
sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
struct sctp_nonpad_sndrcvinfo *srcv)
{
struct sctp_copy_all *ca;
struct mbuf *mat;
ssize_t sndlen;
int ret;
if (uio != NULL) {
sndlen = uio->uio_resid;
} else {
sndlen = 0;
for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
sndlen += SCTP_BUF_LEN(mat);
}
}
if (sndlen > (ssize_t)SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
return (EMSGSIZE);
}
SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
SCTP_M_COPYAL);
if (ca == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
memset(ca, 0, sizeof(struct sctp_copy_all));
ca->inp = inp;
if (srcv != NULL) {
memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
}
SCTP_INP_WLOCK(inp);
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) != 0) {
SCTP_INP_WUNLOCK(inp);
sctp_m_freem(m);
SCTP_FREE(ca, SCTP_M_COPYAL);
return (EBUSY);
}
inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
SCTP_INP_WUNLOCK(inp);
ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
ca->sndlen = sndlen;
if (uio != NULL) {
ca->m = sctp_copy_out_all(uio, ca->sndlen);
if (ca->m == NULL) {
SCTP_FREE(ca, SCTP_M_COPYAL);
sctp_m_freem(m);
SCTP_INP_WLOCK(inp);
inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
SCTP_INP_WUNLOCK(inp);
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
} else {
ca->m = m;
}
ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
SCTP_ASOC_ANY_STATE,
(void *)ca, 0,
sctp_sendall_completes, inp, 1);
if (ret != 0) {
SCTP_INP_WLOCK(inp);
inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
SCTP_INP_WUNLOCK(inp);
SCTP_FREE(ca, SCTP_M_COPYAL);
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return (EFAULT);
}
return (0);
}
void
sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk, *nchk;
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
}
}
}
void
sctp_toss_old_asconf(struct sctp_tcb *stcb)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk, *nchk;
struct sctp_asconf_chunk *acp;
asoc = &stcb->asoc;
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
if (chk->rec.chunk_id.id == SCTP_ASCONF) {
if (chk->data) {
acp = mtod(chk->data, struct sctp_asconf_chunk *);
if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
break;
}
}
TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
}
}
}
static void
sctp_clean_up_datalist(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_tmit_chunk **data_list,
int bundle_at,
struct sctp_nets *net)
{
int i;
struct sctp_tmit_chunk *tp1;
for (i = 0; i < bundle_at; i++) {
TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
asoc->send_queue_cnt--;
if (i > 0) {
data_list[i]->do_rtt = 0;
}
data_list[i]->sent_rcv_time = net->last_sent_time;
data_list[i]->rec.data.cwnd_at_send = net->cwnd;
data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
if (data_list[i]->whoTo == NULL) {
data_list[i]->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
struct sctp_tmit_chunk *tpp;
back_up_more:
tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
if (tpp == NULL) {
TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
goto all_done;
}
tp1 = tpp;
if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
goto back_up_more;
}
TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
} else {
TAILQ_INSERT_TAIL(&asoc->sent_queue,
data_list[i],
sctp_next);
}
all_done:
asoc->sent_queue_cnt++;
if ((asoc->peers_rwnd <= 0) &&
(asoc->total_flight == 0) &&
(bundle_at == 1)) {
SCTP_STAT_INCR(sctps_windowprobed);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC2, 3);
#endif
data_list[i]->sent = SCTP_DATAGRAM_SENT;
data_list[i]->snd_count = 1;
data_list[i]->rec.data.chunk_was_revoked = 0;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
data_list[i]->whoTo->flight_size,
data_list[i]->book_size,
(uint32_t)(uintptr_t)data_list[i]->whoTo,
data_list[i]->rec.data.tsn);
}
sctp_flight_size_increase(data_list[i]);
sctp_total_flight_increase(stcb, data_list[i]);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
}
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
(uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
asoc->peers_rwnd = 0;
}
}
if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
(*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
}
}
static void
sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked)
{
struct sctp_tmit_chunk *chk, *nchk;
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
clean_up_anyway:
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt--;
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
asoc->fwd_tsn_cnt--;
}
sctp_free_a_chunk(stcb, chk, so_locked);
} else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
if (chk != asoc->str_reset) {
goto clean_up_anyway;
}
}
}
}
static uint32_t
sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
uint32_t space_left, uint32_t frag_point, int eeor_on)
{
if (eeor_on) {
if (space_left >= length) {
if (stcb->asoc.total_flight == 0) {
return (length);
}
return (0);
} else {
return (space_left);
}
}
if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
return (length);
}
if ((length <= space_left) ||
((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
return (0);
}
if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
return (min(space_left, frag_point));
}
return (0);
}
static uint32_t
sctp_move_to_outqueue(struct sctp_tcb *stcb,
struct sctp_nets *net,
struct sctp_stream_out *strq,
uint32_t space_left,
uint32_t frag_point,
int *giveup,
int eeor_mode,
int *bail,
int so_locked)
{
struct sctp_association *asoc;
struct sctp_stream_queue_pending *sp;
struct sctp_tmit_chunk *chk;
struct sctp_data_chunk *dchkh = NULL;
struct sctp_idata_chunk *ndchkh = NULL;
uint32_t to_move, length;
int leading;
uint8_t rcv_flags = 0;
uint8_t some_taken;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
one_more_time:
sp = TAILQ_FIRST(&strq->outqueue);
if (sp == NULL) {
sp = TAILQ_FIRST(&strq->outqueue);
if (sp) {
goto one_more_time;
}
if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
(stcb->asoc.idata_supported == 0) &&
(strq->last_msg_incomplete)) {
SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
strq->sid,
strq->last_msg_incomplete);
strq->last_msg_incomplete = 0;
}
to_move = 0;
goto out_of;
}
if ((sp->msg_is_complete) && (sp->length == 0)) {
if (sp->sender_all_done) {
if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
sp->sender_all_done,
sp->length,
sp->msg_is_complete,
sp->put_last_out);
}
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
TAILQ_REMOVE(&strq->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
(strq->chunks_on_queues == 0) &&
TAILQ_EMPTY(&strq->outqueue)) {
stcb->asoc.trigger_reset = 1;
}
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
sctp_free_a_strmoq(stcb, sp, so_locked);
goto one_more_time;
} else {
*giveup = 1;
to_move = 0;
goto out_of;
}
} else {
if (sp->length == 0) {
*giveup = 1;
to_move = 0;
goto out_of;
} else if (sp->discard_rest) {
atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
if ((stcb->sctp_socket != NULL) &&
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
SCTP_SB_DECR(&stcb->sctp_socket->so_snd, sp->length);
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
}
sp->length = 0;
sp->some_taken = 1;
*giveup = 1;
to_move = 0;
goto out_of;
}
}
some_taken = sp->some_taken;
length = sp->length;
if (sp->msg_is_complete) {
to_move = min(length, frag_point);
if (to_move == length) {
if (sp->some_taken) {
rcv_flags |= SCTP_DATA_LAST_FRAG;
} else {
rcv_flags |= SCTP_DATA_NOT_FRAG;
}
sp->put_last_out = 1;
if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
}
} else {
if (sp->some_taken == 0) {
rcv_flags |= SCTP_DATA_FIRST_FRAG;
}
sp->some_taken = 1;
}
} else {
to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
if (to_move > 0) {
if (to_move >= length) {
to_move = length;
}
if (sp->some_taken == 0) {
rcv_flags |= SCTP_DATA_FIRST_FRAG;
sp->some_taken = 1;
}
} else {
*giveup = 1;
to_move = 0;
goto out_of;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
*giveup = 1;
to_move = 0;
goto out_of;
}
if (sp->sinfo_flags & SCTP_UNORDERED) {
rcv_flags |= SCTP_DATA_UNORDERED;
}
if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
(sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
}
memset(chk, 0, sizeof(*chk));
chk->rec.data.rcv_flags = rcv_flags;
if (to_move >= length) {
if (to_move < sp->length) {
goto dont_do_it;
}
chk->data = sp->data;
chk->last_mbuf = sp->tail_mbuf;
sp->data = sp->tail_mbuf = NULL;
} else {
struct mbuf *m;
dont_do_it:
chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
chk->last_mbuf = NULL;
if (chk->data == NULL) {
sp->some_taken = some_taken;
sctp_free_a_chunk(stcb, chk, so_locked);
*bail = 1;
to_move = 0;
goto out_of;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
}
#endif
m_adj(sp->data, to_move);
m = sp->data;
while (m && (SCTP_BUF_LEN(m) == 0)) {
sp->data = SCTP_BUF_NEXT(m);
SCTP_BUF_NEXT(m) = NULL;
if (sp->tail_mbuf == m) {
#ifdef INVARIANTS
panic("Huh, freeing tail? - TSNH");
#else
SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
sp->tail_mbuf = sp->data = NULL;
sp->length = 0;
#endif
}
sctp_m_free(m);
m = sp->data;
}
}
if (SCTP_BUF_IS_EXTENDED(chk->data)) {
chk->copy_by_ref = 1;
} else {
chk->copy_by_ref = 0;
}
if (chk->last_mbuf == NULL) {
chk->last_mbuf = chk->data;
while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
}
}
if (to_move > length) {
#ifdef INVARIANTS
panic("Huh, how can to_move be larger?");
#else
SCTP_PRINTF("Huh, how can to_move be larger?\n");
sp->length = 0;
#endif
} else {
atomic_subtract_int(&sp->length, to_move);
}
leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
if (M_LEADINGSPACE(chk->data) < leading) {
struct mbuf *m;
m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
if (m == NULL) {
if (sp->data == NULL) {
sp->data = chk->data;
sp->tail_mbuf = chk->last_mbuf;
} else {
struct mbuf *m_tmp;
m_tmp = sp->data;
sp->data = chk->data;
SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
}
sp->some_taken = some_taken;
atomic_add_int(&sp->length, to_move);
chk->data = NULL;
*bail = 1;
sctp_free_a_chunk(stcb, chk, so_locked);
to_move = 0;
goto out_of;
} else {
SCTP_BUF_LEN(m) = 0;
SCTP_BUF_NEXT(m) = chk->data;
chk->data = m;
M_ALIGN(chk->data, 4);
}
}
SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
if (chk->data == NULL) {
#ifdef INVARIANTS
panic("prepend fails HELP?");
#else
SCTP_PRINTF("prepend fails HELP?\n");
sctp_free_a_chunk(stcb, chk, so_locked);
#endif
*bail = 1;
to_move = 0;
goto out_of;
}
sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
chk->book_size_scale = 0;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->pad_inplace = 0;
chk->no_fr_allowed = 0;
if (stcb->asoc.idata_supported == 0) {
if (rcv_flags & SCTP_DATA_UNORDERED) {
chk->rec.data.mid = 0;
} else {
chk->rec.data.mid = strq->next_mid_ordered;
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
strq->next_mid_ordered++;
}
}
} else {
if (rcv_flags & SCTP_DATA_UNORDERED) {
chk->rec.data.mid = strq->next_mid_unordered;
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
strq->next_mid_unordered++;
}
} else {
chk->rec.data.mid = strq->next_mid_ordered;
if (rcv_flags & SCTP_DATA_LAST_FRAG) {
strq->next_mid_ordered++;
}
}
}
chk->rec.data.sid = sp->sid;
chk->rec.data.ppid = sp->ppid;
chk->rec.data.context = sp->context;
chk->rec.data.doing_fast_retransmit = 0;
chk->rec.data.timetodrop = sp->ts;
chk->flags = sp->act_flags;
if (sp->net) {
chk->whoTo = sp->net;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else
chk->whoTo = NULL;
if (sp->holds_key_ref) {
chk->auth_keyid = sp->auth_keyid;
sctp_auth_key_acquire(stcb, chk->auth_keyid);
chk->holds_key_ref = 1;
}
stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, to_move);
chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
(uint32_t)(uintptr_t)stcb, sp->length,
(uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
chk->rec.data.tsn);
}
if (stcb->asoc.idata_supported == 0) {
dchkh = mtod(chk->data, struct sctp_data_chunk *);
} else {
ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
}
SCTP_TCB_LOCK_ASSERT(stcb);
#ifdef SCTP_ASOCLOG_OF_TSNS
if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
asoc->tsn_out_at = 0;
asoc->tsn_out_wrapped = 1;
}
asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
asoc->tsn_out_at++;
#endif
if (stcb->asoc.idata_supported == 0) {
dchkh->ch.chunk_type = SCTP_DATA;
dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
dchkh->dp.tsn = htonl(chk->rec.data.tsn);
dchkh->dp.sid = htons(strq->sid);
dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
dchkh->dp.ppid = chk->rec.data.ppid;
dchkh->ch.chunk_length = htons(chk->send_size);
} else {
ndchkh->ch.chunk_type = SCTP_IDATA;
ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
ndchkh->dp.sid = htons(strq->sid);
ndchkh->dp.reserved = htons(0);
ndchkh->dp.mid = htonl(chk->rec.data.mid);
if (sp->fsn == 0)
ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
else
ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
sp->fsn++;
ndchkh->ch.chunk_length = htons(chk->send_size);
}
if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
struct mbuf *lm;
int pads;
pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
if (lm != NULL) {
chk->last_mbuf = lm;
chk->pad_inplace = 1;
}
chk->send_size += pads;
}
if (PR_SCTP_ENABLED(chk->flags)) {
asoc->pr_sctp_cnt++;
}
if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
if (sp->put_last_out == 0) {
SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
sp->sender_all_done,
sp->length,
sp->msg_is_complete,
sp->put_last_out);
}
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
TAILQ_REMOVE(&strq->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
(strq->chunks_on_queues == 0) &&
TAILQ_EMPTY(&strq->outqueue)) {
stcb->asoc.trigger_reset = 1;
}
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
sctp_free_a_strmoq(stcb, sp, so_locked);
}
asoc->chunks_on_out_queue++;
strq->chunks_on_queues++;
TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
asoc->send_queue_cnt++;
out_of:
return (to_move);
}
static void
sctp_fill_outqueue(struct sctp_tcb *stcb, struct sctp_nets *net,
uint32_t frag_point, int eeor_mode, int *quit_now,
int so_locked)
{
struct sctp_association *asoc;
struct sctp_stream_out *strq;
uint32_t space_left, moved, total_moved;
int bail, giveup;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
total_moved = 0;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
space_left = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
space_left = net->mtu;
break;
}
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
space_left &= 0xfffffffc;
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
giveup = 0;
bail = 0;
while ((space_left > 0) && (strq != NULL)) {
moved = sctp_move_to_outqueue(stcb, net, strq, space_left,
frag_point, &giveup, eeor_mode,
&bail, so_locked);
if ((giveup != 0) || (bail != 0)) {
break;
}
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
total_moved += moved;
if (space_left >= moved) {
space_left -= moved;
} else {
space_left = 0;
}
if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
} else {
space_left = 0;
}
space_left &= 0xfffffffc;
}
if (bail != 0)
*quit_now = 1;
stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
if (total_moved == 0) {
if ((stcb->asoc.sctp_cmt_on_off == 0) &&
(net == stcb->asoc.primary_destination)) {
SCTP_STAT_INCR(sctps_primary_randry);
} else if (stcb->asoc.sctp_cmt_on_off > 0) {
SCTP_STAT_INCR(sctps_cmt_randry);
}
}
}
void
sctp_fix_ecn_echo(struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk;
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
chk->sent = SCTP_DATAGRAM_UNSENT;
}
}
}
void
sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_stream_queue_pending *sp;
unsigned int i;
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
if (sp->net == net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
}
}
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->whoTo == net) {
sctp_free_remote_addr(chk->whoTo);
chk->whoTo = NULL;
}
}
}
int
sctp_med_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *num_out,
int *reason_code,
int control_only, int from_where,
struct timeval *now, int *now_filled,
uint32_t frag_point, int so_locked)
{
struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
struct mbuf *outchain, *endoutchain;
struct sctp_tmit_chunk *chk, *nchk;
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
int no_fragmentflg, error;
unsigned int max_rwnd_per_dest, max_send_per_dest;
int one_chunk, hbflag, skip_data_for_this_net;
int asconf, cookie, no_out_cnt;
int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
int tsns_sent = 0;
uint32_t auth_offset;
struct sctp_auth_chunk *auth;
uint16_t auth_keyid;
int override_ok = 1;
int skip_fill_up = 0;
int data_auth_reqd = 0;
int quit_now = 0;
bool use_zero_crc;
*num_out = 0;
*reason_code = 0;
auth_keyid = stcb->asoc.authinfo.active_keyid;
if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
eeor_mode = 1;
} else {
eeor_mode = 0;
}
ctl_cnt = no_out_cnt = asconf = cookie = 0;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC2, 2);
#endif
SCTP_TCB_LOCK_ASSERT(stcb);
hbflag = 0;
if (control_only)
no_data_chunks = 1;
else
no_data_chunks = 0;
if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue) &&
sctp_is_there_unsent_data(stcb, so_locked) == 0) {
nothing_to_send:
*reason_code = 9;
return (0);
}
if (asoc->peers_rwnd == 0) {
*reason_code = 1;
if (asoc->total_flight > 0) {
no_data_chunks = 1;
}
}
if (stcb->asoc.ecn_echo_cnt_onq) {
if (no_data_chunks &&
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
goto nothing_to_send;
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
sack_goes_to = chk->whoTo;
break;
}
}
}
max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
if (stcb->sctp_socket)
max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
else
max_send_per_dest = 0;
if (no_data_chunks == 0) {
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->whoTo == NULL) {
skip_fill_up = 1;
break;
}
}
}
if ((no_data_chunks == 0) &&
(skip_fill_up == 0) &&
(!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
net->window_probe = 0;
if ((net != stcb->asoc.alternate) &&
((net->dest_state & SCTP_ADDR_PF) ||
((net->dest_state & SCTP_ADDR_REACHABLE) == 0) ||
(net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 1,
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
continue;
}
if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
(net->flight_size == 0)) {
(*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
}
if (net->flight_size >= net->cwnd) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 3,
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
continue;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
if (quit_now) {
no_data_chunks = 1;
break;
}
}
}
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue)) {
*reason_code = 8;
return (0);
}
if (asoc->sctp_cmt_on_off > 0) {
start_at = asoc->last_net_cmt_send_started;
if (start_at == NULL) {
start_at = TAILQ_FIRST(&asoc->nets);
} else {
start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
if (start_at == NULL) {
start_at = TAILQ_FIRST(&asoc->nets);
}
}
asoc->last_net_cmt_send_started = start_at;
} else {
start_at = TAILQ_FIRST(&asoc->nets);
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->whoTo == NULL) {
if (asoc->alternate) {
chk->whoTo = asoc->alternate;
} else {
chk->whoTo = asoc->primary_destination;
}
atomic_add_int(&chk->whoTo->ref_count, 1);
}
}
old_start_at = NULL;
again_one_more_time:
for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
if (old_start_at && (old_start_at == net)) {
break;
}
tsns_sent = 0xa;
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
(net->flight_size >= net->cwnd)) {
continue;
}
bundle_at = 0;
endoutchain = outchain = NULL;
auth = NULL;
auth_offset = 0;
no_fragmentflg = 1;
one_chunk = 0;
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
skip_data_for_this_net = 1;
} else {
skip_data_for_this_net = 0;
}
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
mtu = net->mtu;
break;
}
mx_mtu = mtu;
to_out = 0;
if (mtu > asoc->peers_rwnd) {
if (asoc->total_flight > 0) {
r_mtu = asoc->peers_rwnd;
} else {
one_chunk = 1;
r_mtu = mtu;
}
} else {
r_mtu = mtu;
}
error = 0;
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
if (chk->rec.chunk_id.id != SCTP_ASCONF) {
continue;
}
if (chk->whoTo == NULL) {
if (asoc->alternate == NULL) {
if (asoc->primary_destination != net) {
break;
}
} else {
if (asoc->alternate != net) {
break;
}
}
} else {
if (chk->whoTo != net) {
break;
}
}
if (chk->data == NULL) {
break;
}
if (chk->sent != SCTP_DATAGRAM_UNSENT &&
chk->sent != SCTP_DATAGRAM_RESEND) {
break;
}
if ((auth == NULL) &&
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks)) {
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
omtu = 0;
if ((chk->send_size < (int)(mtu - omtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
(int)chk->rec.chunk_id.can_take_data,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
*reason_code = 8;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
if (mtu > (chk->send_size + omtu))
mtu -= (chk->send_size + omtu);
else
mtu = 0;
to_out += (chk->send_size + omtu);
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (chk->rec.chunk_id.can_take_data)
chk->data = NULL;
hbflag = 1;
asconf = 1;
no_data_chunks = 1;
chk->sent = SCTP_DATAGRAM_SENT;
if (chk->whoTo == NULL) {
chk->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
chk->snd_count++;
if (mtu == 0) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
hbflag = 0;
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
outchain, auth_offset, auth,
stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
false, so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
if (error == EHOSTUNREACH) {
sctp_move_chunks_from_net(stcb, net);
}
asconf = 0;
*reason_code = 7;
break;
} else {
asoc->ifp_had_enobuf = 0;
}
outchain = endoutchain = NULL;
auth = NULL;
auth_offset = 0;
asconf = 0;
if (!no_out_cnt)
*num_out += ctl_cnt;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
mtu = net->mtu;
break;
}
to_out = 0;
no_fragmentflg = 1;
}
}
}
if (error != 0) {
continue;
}
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if ((sack_goes_to) &&
(chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
(chk->whoTo != sack_goes_to)) {
if (chk->whoTo == net) {
continue;
} else if (sack_goes_to == net) {
goto skip_net_check;
}
}
if (chk->whoTo == NULL) {
if (asoc->alternate == NULL) {
if (asoc->primary_destination != net) {
continue;
}
} else {
if (asoc->alternate != net) {
continue;
}
}
} else {
if (chk->whoTo != net) {
continue;
}
}
skip_net_check:
if (chk->data == NULL) {
continue;
}
if (chk->sent != SCTP_DATAGRAM_UNSENT) {
continue;
}
if ((auth == NULL) &&
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks)) {
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
omtu = 0;
if ((chk->send_size <= (int)(mtu - omtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
(int)chk->rec.chunk_id.can_take_data,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
*reason_code = 8;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
if (mtu > (chk->send_size + omtu))
mtu -= (chk->send_size + omtu);
else
mtu = 0;
to_out += (chk->send_size + omtu);
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (chk->rec.chunk_id.can_take_data)
chk->data = NULL;
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
hbflag = 1;
}
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
inp, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
}
}
ctl_cnt++;
} else {
ctl_cnt++;
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
cookie = 1;
no_out_cnt = 1;
} else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
SCTP_STAT_INCR(sctps_sendecne);
}
chk->sent = SCTP_DATAGRAM_SENT;
if (chk->whoTo == NULL) {
chk->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
chk->snd_count++;
}
if (mtu == 0) {
switch (asoc->snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
if (asconf) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
use_zero_crc = false;
}
if (cookie) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
use_zero_crc = false;
cookie = 0;
}
if (hbflag) {
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
hbflag = 0;
}
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
outchain,
auth_offset, auth,
stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
use_zero_crc, so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
if (error == EHOSTUNREACH) {
sctp_move_chunks_from_net(stcb, net);
}
asconf = 0;
*reason_code = 7;
break;
} else {
asoc->ifp_had_enobuf = 0;
}
outchain = endoutchain = NULL;
auth = NULL;
auth_offset = 0;
asconf = 0;
if (!no_out_cnt)
*num_out += ctl_cnt;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
mtu = net->mtu;
break;
}
to_out = 0;
no_fragmentflg = 1;
}
}
}
if (error != 0) {
continue;
}
if ((asoc->sctp_cmt_on_off > 0) &&
(net != stcb->asoc.alternate) &&
(net->dest_state & SCTP_ADDR_PF)) {
goto no_data_fill;
}
if (net->flight_size >= net->cwnd) {
goto no_data_fill;
}
if ((asoc->sctp_cmt_on_off > 0) &&
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
(net->flight_size > max_rwnd_per_dest)) {
goto no_data_fill;
}
if ((asoc->sctp_cmt_on_off > 0) &&
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
(max_send_per_dest > 0) &&
(net->flight_size > max_send_per_dest)) {
goto no_data_fill;
}
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
stcb->asoc.peer_auth_chunks);
if (data_auth_reqd && (auth == NULL)) {
mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
}
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
#ifdef INET
case AF_INET:
if (net->mtu > SCTP_MIN_V4_OVERHEAD)
omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
else
omtu = 0;
break;
#endif
#ifdef INET6
case AF_INET6:
if (net->mtu > SCTP_MIN_OVERHEAD)
omtu = net->mtu - SCTP_MIN_OVERHEAD;
else
omtu = 0;
break;
#endif
default:
omtu = 0;
break;
}
if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
(skip_data_for_this_net == 0)) ||
(cookie)) {
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
if (no_data_chunks) {
*reason_code = 1;
break;
}
if (net->flight_size >= net->cwnd) {
*reason_code = 2;
break;
}
if ((chk->whoTo != NULL) &&
(chk->whoTo != net)) {
continue;
}
if (asoc->sctp_cmt_on_off == 0) {
if ((asoc->alternate) &&
(asoc->alternate != net) &&
(chk->whoTo == NULL)) {
continue;
} else if ((net != asoc->primary_destination) &&
(asoc->alternate == NULL) &&
(chk->whoTo == NULL)) {
continue;
}
}
if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
chk->send_size, mtu);
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
struct sctp_data_chunk *dchkh;
dchkh = mtod(chk->data, struct sctp_data_chunk *);
dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
}
if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
if (data_auth_reqd) {
if (auth == NULL) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = chk->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
auth_keyid = chk->auth_keyid;
override_ok = 0;
} else if (auth_keyid != chk->auth_keyid) {
break;
}
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
*reason_code = 3;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (mtu > chk->send_size)
mtu -= chk->send_size;
else
mtu = 0;
if (r_mtu > chk->send_size)
r_mtu -= chk->send_size;
else
r_mtu = 0;
to_out += chk->send_size;
if ((to_out > mx_mtu) && no_fragmentflg) {
#ifdef INVARIANTS
panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
#else
SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
mx_mtu, to_out);
#endif
}
chk->window_probe = 0;
data_list[bundle_at++] = chk;
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
break;
}
if (chk->sent == SCTP_DATAGRAM_UNSENT) {
if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
} else {
SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
}
if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
}
if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
data_list[0]->window_probe = 1;
net->window_probe = 1;
}
break;
}
} else {
break;
}
}
}
no_data_fill:
if (outchain) {
switch (asoc->snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
if (asconf) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
stcb, net);
use_zero_crc = false;
}
if (cookie) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
use_zero_crc = false;
cookie = 0;
}
if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
if (bundle_at || hbflag) {
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
}
if ((error = sctp_lowlevel_chunk_output(inp,
stcb,
net,
(struct sockaddr *)&net->ro._l_addr,
outchain,
auth_offset,
auth,
auth_keyid,
no_fragmentflg,
bundle_at,
asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
use_zero_crc,
so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
if (error == EHOSTUNREACH) {
sctp_move_chunks_from_net(stcb, net);
}
asconf = 0;
*reason_code = 6;
ctl_cnt = 0;
continue;
} else {
asoc->ifp_had_enobuf = 0;
}
endoutchain = NULL;
auth = NULL;
auth_offset = 0;
asconf = 0;
if (!no_out_cnt) {
*num_out += (ctl_cnt + bundle_at);
}
if (bundle_at) {
tsns_sent = data_list[0]->rec.data.tsn;
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
*now_filled = 1;
*now = asoc->time_last_sent;
} else {
asoc->time_last_sent = *now;
}
if (net->rto_needed) {
data_list[0]->do_rtt = 1;
net->rto_needed = 0;
}
SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
}
if (one_chunk) {
break;
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
}
}
if (old_start_at == NULL) {
old_start_at = start_at;
start_at = TAILQ_FIRST(&asoc->nets);
if (old_start_at)
goto again_one_more_time;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
}
if ((*num_out == 0) && (*reason_code == 0)) {
*reason_code = 4;
} else {
*reason_code = 5;
}
sctp_clean_up_ctl(stcb, asoc, so_locked);
return (0);
}
void
sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
{
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
struct mbuf *mat, *last_mbuf;
uint32_t chunk_length;
uint16_t padding_length;
SCTP_TCB_LOCK_ASSERT(stcb);
SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
if (op_err == NULL) {
return;
}
last_mbuf = NULL;
chunk_length = 0;
for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
chunk_length += SCTP_BUF_LEN(mat);
if (SCTP_BUF_NEXT(mat) == NULL) {
last_mbuf = mat;
}
}
if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
sctp_m_freem(op_err);
return;
}
padding_length = chunk_length % 4;
if (padding_length != 0) {
padding_length = 4 - padding_length;
}
if (padding_length != 0) {
if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
sctp_m_freem(op_err);
return;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(op_err);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->send_size = (uint16_t)chunk_length;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = op_err;
chk->whoTo = NULL;
hdr = mtod(op_err, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_OPERATION_ERROR;
hdr->chunk_flags = 0;
hdr->chunk_length = htons(chk->send_size);
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
int
sctp_send_cookie_echo(struct mbuf *m,
int offset, int limit,
struct sctp_tcb *stcb,
struct sctp_nets *net)
{
int at;
struct mbuf *cookie;
struct sctp_paramhdr param, *phdr;
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
uint16_t ptype, plen;
SCTP_TCB_LOCK_ASSERT(stcb);
cookie = NULL;
at = offset + sizeof(struct sctp_init_chunk);
for (;;) {
phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
if (phdr == NULL) {
return (-3);
}
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
if (plen < sizeof(struct sctp_paramhdr)) {
return (-6);
}
if (ptype == SCTP_STATE_COOKIE) {
int pad;
if (at + plen > limit) {
return (-7);
}
cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
if (cookie == NULL) {
return (-2);
}
if ((pad = (plen % 4)) > 0) {
pad = 4 - pad;
}
if (pad > 0) {
if (sctp_pad_lastmbuf(cookie, pad, NULL) == NULL) {
return (-8);
}
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
}
#endif
break;
}
at += SCTP_SIZE32(plen);
}
hdr = mtod(cookie, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_COOKIE_ECHO;
hdr->chunk_flags = 0;
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(cookie);
return (-5);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->send_size = SCTP_SIZE32(plen);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = cookie;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return (0);
}
void
sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
struct mbuf *m,
int offset,
int chk_length,
struct sctp_nets *net)
{
struct mbuf *outchain;
struct sctp_chunkhdr *chdr;
struct sctp_tmit_chunk *chk;
if (net == NULL)
return;
outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
if (outchain == NULL) {
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
}
#endif
chdr = mtod(outchain, struct sctp_chunkhdr *);
chdr->chunk_type = SCTP_HEARTBEAT_ACK;
chdr->chunk_flags = 0;
if (chk_length % 4 != 0) {
sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(outchain);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = chk_length;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = outchain;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
void
sctp_send_cookie_ack(struct sctp_tcb *stcb)
{
struct mbuf *cookie_ack;
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
SCTP_TCB_LOCK_ASSERT(stcb);
cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
if (cookie_ack == NULL) {
return;
}
SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(cookie_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_chunkhdr);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = cookie_ack;
if (chk->asoc->last_control_chunk_from != NULL) {
chk->whoTo = chk->asoc->last_control_chunk_from;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else {
chk->whoTo = NULL;
}
hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_COOKIE_ACK;
hdr->chunk_flags = 0;
hdr->chunk_length = htons(chk->send_size);
SCTP_BUF_LEN(cookie_ack) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
{
struct mbuf *m_shutdown_ack;
struct sctp_shutdown_ack_chunk *ack_cp;
struct sctp_tmit_chunk *chk;
m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown_ack == NULL) {
return;
}
SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(m_shutdown_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_chunkhdr);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = m_shutdown_ack;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
ack_cp->ch.chunk_flags = 0;
ack_cp->ch.chunk_length = htons(chk->send_size);
SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
{
struct mbuf *m_shutdown;
struct sctp_shutdown_chunk *shutdown_cp;
struct sctp_tmit_chunk *chk;
TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
if (chk->whoTo) {
sctp_free_remote_addr(chk->whoTo);
chk->whoTo = NULL;
}
break;
}
}
if (chk == NULL) {
m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown == NULL) {
return;
}
SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(m_shutdown);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_SHUTDOWN;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_shutdown_chunk);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = m_shutdown;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
shutdown_cp->ch.chunk_flags = 0;
shutdown_cp->ch.chunk_length = htons(chk->send_size);
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
SCTP_BUF_LEN(m_shutdown) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
} else {
TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
}
return;
}
void
sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
{
struct sctp_tmit_chunk *chk;
struct mbuf *m_asconf;
int len;
SCTP_TCB_LOCK_ASSERT(stcb);
if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
(!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
return;
}
m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
if (m_asconf == NULL) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
sctp_m_freem(m_asconf);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ASCONF;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->data = m_asconf;
chk->send_size = len;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_asconf_ack(struct sctp_tcb *stcb)
{
struct sctp_tmit_chunk *chk;
struct sctp_asconf_ack *ack, *latest_ack;
struct mbuf *m_ack;
struct sctp_nets *net = NULL;
SCTP_TCB_LOCK_ASSERT(stcb);
latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
if (latest_ack == NULL) {
return;
}
if (latest_ack->last_sent_to != NULL &&
latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
if (net == NULL) {
if (stcb->asoc.last_control_chunk_from == NULL) {
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
} else {
net = stcb->asoc.last_control_chunk_from;
}
}
} else {
if (stcb->asoc.last_control_chunk_from == NULL) {
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
} else {
net = stcb->asoc.last_control_chunk_from;
}
}
latest_ack->last_sent_to = net;
TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
if (ack->data == NULL) {
continue;
}
m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
if (m_ack == NULL) {
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
}
#endif
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
if (m_ack)
sctp_m_freem(m_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
chk->data = m_ack;
chk->send_size = ack->len;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
return;
}
static int
sctp_chunk_retransmission(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked)
{
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
struct sctp_tmit_chunk *chk, *fwd;
struct mbuf *m, *endofchain;
struct sctp_nets *net = NULL;
uint32_t tsns_sent = 0;
int no_fragmentflg, bundle_at;
unsigned int mtu;
int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
struct sctp_auth_chunk *auth = NULL;
uint32_t auth_offset = 0;
uint16_t auth_keyid;
int override_ok = 1;
int data_auth_reqd = 0;
uint32_t dmtu = 0;
bool use_zero_crc;
SCTP_TCB_LOCK_ASSERT(stcb);
tmr_started = ctl_cnt = 0;
no_fragmentflg = 1;
fwd_tsn = 0;
*cnt_out = 0;
fwd = NULL;
endofchain = m = NULL;
auth_keyid = stcb->asoc.authinfo.active_keyid;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC3, 1);
#endif
if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
(TAILQ_EMPTY(&asoc->control_send_queue))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
asoc->sent_queue_retran_cnt);
asoc->sent_queue_cnt = 0;
asoc->sent_queue_cnt_removeable = 0;
*cnt_out = 0;
return (0);
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
(chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
if (chk->sent != SCTP_DATAGRAM_RESEND) {
continue;
}
if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
if (chk != asoc->str_reset) {
continue;
}
}
ctl_cnt++;
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
fwd_tsn = 1;
}
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
m = sctp_add_auth_chunk(m, &endofchain,
&auth, &auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
break;
}
}
one_chunk = 0;
if (m != NULL) {
switch (asoc->snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
use_zero_crc = false;
} else if (chk->rec.chunk_id.id == SCTP_ASCONF) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
use_zero_crc = false;
}
chk->snd_count++;
if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
(struct sockaddr *)&chk->whoTo->ro._l_addr, m,
auth_offset, auth, stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, 0,
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
chk->whoTo->port, NULL,
0, 0,
use_zero_crc,
so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
return (error);
} else {
asoc->ifp_had_enobuf = 0;
}
endofchain = NULL;
auth = NULL;
auth_offset = 0;
*cnt_out += 1;
chk->sent = SCTP_DATAGRAM_SENT;
sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
if (fwd_tsn == 0) {
return (0);
} else {
sctp_clean_up_ctl(stcb, asoc, so_locked);
return (0);
}
}
if (TAILQ_EMPTY(&asoc->sent_queue)) {
return (SCTP_RETRAN_DONE);
}
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
return (1);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(20, inp, stcb, NULL);
#endif
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
if (chk->sent != SCTP_DATAGRAM_RESEND) {
continue;
}
if (chk->data == NULL) {
SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
chk->rec.data.tsn, chk->snd_count, chk->sent);
continue;
}
if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
(chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
SCTP_SNPRINTF(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
chk->rec.data.tsn, chk->snd_count);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
false, so_locked);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (SCTP_RETRAN_EXIT);
}
net = chk->whoTo;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
mtu = net->mtu;
break;
}
if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
uint32_t tsn;
tsn = asoc->last_acked_seq + 1;
if (tsn == chk->rec.data.tsn) {
goto one_chunk_around;
}
return (1);
}
one_chunk_around:
if (asoc->peers_rwnd < mtu) {
one_chunk = 1;
if ((asoc->peers_rwnd == 0) &&
(asoc->total_flight == 0)) {
chk->window_probe = 1;
chk->whoTo->window_probe = 1;
}
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC3, 2);
#endif
bundle_at = 0;
m = NULL;
net->fast_retran_ip = 0;
if (chk->rec.data.doing_fast_retransmit == 0) {
if (net->flight_size >= net->cwnd) {
continue;
}
} else {
*fr_done = 1;
net->fast_retran_ip = 1;
}
if (data_auth_reqd && (auth == NULL)) {
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
dmtu = 0;
if ((chk->send_size <= (mtu - dmtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
if (data_auth_reqd) {
if (auth == NULL) {
m = sctp_add_auth_chunk(m,
&endofchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = chk->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
auth_keyid = chk->auth_keyid;
override_ok = 0;
} else if (chk->auth_keyid != auth_keyid) {
break;
}
}
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
if (m == NULL) {
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (mtu > (chk->send_size + dmtu))
mtu -= (chk->send_size + dmtu);
else
mtu = 0;
data_list[bundle_at++] = chk;
if (one_chunk && (asoc->total_flight <= 0)) {
SCTP_STAT_INCR(sctps_windowprobed);
}
}
if (one_chunk == 0) {
for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
if (fwd->sent != SCTP_DATAGRAM_RESEND) {
continue;
}
if (fwd->whoTo != net) {
continue;
}
if (data_auth_reqd && (auth == NULL)) {
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
dmtu = 0;
if (fwd->send_size <= (mtu - dmtu)) {
if (data_auth_reqd) {
if (auth == NULL) {
m = sctp_add_auth_chunk(m,
&endofchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = fwd->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
auth_keyid = fwd->auth_keyid;
override_ok = 0;
} else if (fwd->auth_keyid != auth_keyid) {
break;
}
}
m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
if (m == NULL) {
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (mtu > (fwd->send_size + dmtu))
mtu -= (fwd->send_size + dmtu);
else
mtu = 0;
data_list[bundle_at++] = fwd;
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
break;
}
} else {
break;
}
}
}
if (m) {
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
tmr_started = 1;
}
switch (asoc->snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr, m,
auth_offset, auth, auth_keyid,
no_fragmentflg, 0, 0,
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
use_zero_crc,
so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
return (error);
} else {
asoc->ifp_had_enobuf = 0;
}
endofchain = NULL;
auth = NULL;
auth_offset = 0;
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
*now = asoc->time_last_sent;
*now_filled = 1;
} else {
asoc->time_last_sent = *now;
}
*cnt_out += bundle_at;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC4, bundle_at);
#endif
if (bundle_at) {
tsns_sent = data_list[0]->rec.data.tsn;
}
for (i = 0; i < bundle_at; i++) {
SCTP_STAT_INCR(sctps_sendretransdata);
data_list[i]->sent = SCTP_DATAGRAM_SENT;
if (data_list[i]->rec.data.chunk_was_revoked) {
data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
data_list[i]->rec.data.chunk_was_revoked = 0;
}
data_list[i]->snd_count++;
sctp_ucount_decr(asoc->sent_queue_retran_cnt);
data_list[i]->sent_rcv_time = asoc->time_last_sent;
if (data_list[i]->book_size_scale) {
data_list[i]->book_size_scale = 0;
atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
data_list[i]->book_size *= 2;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
}
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
(uint32_t)(data_list[i]->send_size +
SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
data_list[i]->whoTo->flight_size,
data_list[i]->book_size,
(uint32_t)(uintptr_t)data_list[i]->whoTo,
data_list[i]->rec.data.tsn);
}
sctp_flight_size_increase(data_list[i]);
sctp_total_flight_increase(stcb, data_list[i]);
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
asoc->peers_rwnd = 0;
}
if ((i == 0) &&
(data_list[i]->rec.data.doing_fast_retransmit)) {
SCTP_STAT_INCR(sctps_sendfastretrans);
if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
(tmr_started == 0)) {
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(21, inp, stcb, NULL);
#endif
} else {
return (1);
}
if (asoc->sent_queue_retran_cnt <= 0) {
asoc->sent_queue_retran_cnt = 0;
break;
}
if (one_chunk) {
return (1);
}
break;
}
return (0);
}
static void
sctp_timer_validation(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc)
{
struct sctp_nets *net;
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
return;
}
}
SCTP_TCB_LOCK_ASSERT(stcb);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
if (asoc->alternate) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
} else {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
}
return;
}
void
sctp_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int from_where,
int so_locked)
{
struct sctp_association *asoc;
struct sctp_nets *net;
int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
unsigned int burst_cnt = 0;
struct timeval now;
int now_filled = 0;
int nagle_on;
uint32_t frag_point = sctp_get_frag_point(stcb);
int un_sent = 0;
int fr_done;
unsigned int tot_frs = 0;
asoc = &stcb->asoc;
do_it_again:
if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
nagle_on = 0;
} else {
nagle_on = 1;
}
} else {
nagle_on = 0;
}
SCTP_TCB_LOCK_ASSERT(stcb);
un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
if ((un_sent <= 0) &&
(TAILQ_EMPTY(&asoc->control_send_queue)) &&
(TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
(asoc->sent_queue_retran_cnt == 0) &&
(asoc->trigger_reset == 0)) {
return;
}
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
sctp_send_sack(stcb, so_locked);
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
}
while (asoc->sent_queue_retran_cnt) {
if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
from_where,
&now, &now_filled, frag_point, so_locked);
return;
} else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
fr_done = 0;
ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
if (fr_done) {
tot_frs++;
}
} else {
ret = 1;
}
if (ret > 0) {
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
from_where,
&now, &now_filled, frag_point, so_locked);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(8, inp, stcb, NULL);
#endif
sctp_timer_validation(inp, stcb, asoc);
return;
}
if (ret < 0) {
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(9, inp, stcb, NULL);
#endif
if (ret == SCTP_RETRAN_EXIT) {
return;
}
break;
}
if (from_where == SCTP_OUTPUT_FROM_T3) {
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(10, inp, stcb, NULL);
#endif
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
&now, &now_filled, frag_point, so_locked);
return;
}
if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
return;
}
if ((num_out == 0) && (ret == 0)) {
break;
}
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(12, inp, stcb, NULL);
#endif
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
if ((net->dest_state & SCTP_ADDR_REACHABLE) == 0) {
if (net->ref_count > 1)
sctp_move_chunks_from_net(stcb, net);
} else {
if (asoc->max_burst > 0) {
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
}
SCTP_STAT_INCR(sctps_maxburstqueued);
}
net->fast_retran_ip = 0;
} else {
if (net->flight_size == 0) {
;
}
}
}
}
}
burst_cnt = 0;
do {
error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
&reason_code, 0, from_where,
&now, &now_filled, frag_point, so_locked);
if (error) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
}
break;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
tot_out += num_out;
burst_cnt++;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
if (num_out == 0) {
sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
}
}
if (nagle_on) {
un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
(stcb->asoc.total_flight > 0)) {
break;
}
}
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue) &&
sctp_is_there_unsent_data(stcb, so_locked) == 0) {
break;
}
if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
break;
}
} while (num_out &&
((asoc->max_burst == 0) ||
SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
(burst_cnt < asoc->max_burst)));
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
SCTP_STAT_INCR(sctps_maxburstqueued);
asoc->burst_limit_applied = 1;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
}
} else {
asoc->burst_limit_applied = 0;
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
}
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
tot_out);
if (stcb->asoc.ecn_echo_cnt_onq)
sctp_fix_ecn_echo(asoc);
if (stcb->asoc.trigger_reset) {
if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
goto do_it_again;
}
}
return;
}
int
sctp_output(
struct sctp_inpcb *inp,
struct mbuf *m,
struct sockaddr *addr,
struct mbuf *control,
struct thread *p,
int flags)
{
if (inp == NULL) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (inp->sctp_socket == NULL) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
return (sctp_sosend(inp->sctp_socket,
addr,
(struct uio *)NULL,
m,
control,
flags, p
));
}
void
send_forward_tsn(struct sctp_tcb *stcb,
struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk, *at, *tp1, *last;
struct sctp_forward_tsn_chunk *fwdtsn;
struct sctp_strseq *strseq;
struct sctp_strseq_mid *strseq_m;
uint32_t advance_peer_ack_point;
unsigned int cnt_of_space, i, ovh;
unsigned int space_needed;
unsigned int cnt_of_skipped = 0;
SCTP_TCB_LOCK_ASSERT(stcb);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (chk->whoTo) {
sctp_free_remote_addr(chk->whoTo);
chk->whoTo = NULL;
}
goto sctp_fill_in_rest;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
asoc->fwd_tsn_cnt++;
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = asoc;
chk->whoTo = NULL;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
sctp_fill_in_rest:
SCTP_BUF_LEN(chk->data) = 0;
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
(at->sent != SCTP_DATAGRAM_NR_ACKED)) {
break;
}
if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
continue;
}
cnt_of_skipped++;
}
if (asoc->idata_supported) {
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
(cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
} else {
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
(cnt_of_skipped * sizeof(struct sctp_strseq)));
}
cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ovh = SCTP_MIN_OVERHEAD;
} else {
ovh = SCTP_MIN_V4_OVERHEAD;
}
if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
cnt_of_space = asoc->smallest_mtu - ovh;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, 0, cnt_of_skipped,
asoc->advanced_peer_ack_point);
}
advance_peer_ack_point = asoc->advanced_peer_ack_point;
if (cnt_of_space < space_needed) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, 0xff, cnt_of_space,
space_needed);
}
cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
if (asoc->idata_supported) {
cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
} else {
cnt_of_skipped /= sizeof(struct sctp_strseq);
}
at = TAILQ_FIRST(&asoc->sent_queue);
if (at != NULL) {
for (i = 0; i < cnt_of_skipped; i++) {
tp1 = TAILQ_NEXT(at, sctp_next);
if (tp1 == NULL) {
break;
}
at = tp1;
}
}
if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, cnt_of_skipped, at->rec.data.tsn,
asoc->advanced_peer_ack_point);
}
last = at;
if (last) {
advance_peer_ack_point = last->rec.data.tsn;
}
if (asoc->idata_supported) {
space_needed = sizeof(struct sctp_forward_tsn_chunk) +
cnt_of_skipped * sizeof(struct sctp_strseq_mid);
} else {
space_needed = sizeof(struct sctp_forward_tsn_chunk) +
cnt_of_skipped * sizeof(struct sctp_strseq);
}
}
chk->send_size = space_needed;
fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
fwdtsn->ch.chunk_length = htons(chk->send_size);
fwdtsn->ch.chunk_flags = 0;
if (asoc->idata_supported) {
fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
} else {
fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
}
fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
SCTP_BUF_LEN(chk->data) = chk->send_size;
fwdtsn++;
if (asoc->idata_supported) {
strseq_m = (struct sctp_strseq_mid *)fwdtsn;
strseq = NULL;
} else {
strseq = (struct sctp_strseq *)fwdtsn;
strseq_m = NULL;
}
i = 0;
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
if (i >= cnt_of_skipped) {
break;
}
if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
continue;
}
if (at->rec.data.tsn == advance_peer_ack_point) {
at->rec.data.fwd_tsn_cnt = 0;
}
if (asoc->idata_supported) {
strseq_m->sid = htons(at->rec.data.sid);
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
} else {
strseq_m->flags = 0;
}
strseq_m->mid = htonl(at->rec.data.mid);
strseq_m++;
} else {
strseq->sid = htons(at->rec.data.sid);
strseq->ssn = htons((uint16_t)at->rec.data.mid);
strseq++;
}
i++;
}
return;
}
void
sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk, *a_chk;
struct sctp_sack_chunk *sack;
struct sctp_nr_sack_chunk *nr_sack;
struct sctp_gap_ack_block *gap_descriptor;
const struct sack_track *selector;
int mergeable = 0;
int offset;
caddr_t limit;
uint32_t *dup;
int limit_reached = 0;
unsigned int i, siz, j;
unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
int num_dups = 0;
int space_req;
uint32_t highest_tsn;
uint8_t flags;
uint8_t type;
uint8_t tsn_map;
if (stcb->asoc.nrsack_supported == 1) {
type = SCTP_NR_SELECTIVE_ACK;
} else {
type = SCTP_SELECTIVE_ACK;
}
a_chk = NULL;
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->last_data_chunk_from == NULL) {
return;
}
sctp_slide_mapping_arrays(stcb);
sctp_set_rwnd(stcb, asoc);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == type) {
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt--;
a_chk = chk;
if (a_chk->data) {
sctp_m_freem(a_chk->data);
a_chk->data = NULL;
}
if (a_chk->whoTo) {
sctp_free_remote_addr(a_chk->whoTo);
a_chk->whoTo = NULL;
}
break;
}
}
if (a_chk == NULL) {
sctp_alloc_a_chunk(stcb, a_chk);
if (a_chk == NULL) {
if (stcb->asoc.delayed_ack) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL);
} else {
stcb->asoc.send_sack = 1;
}
return;
}
a_chk->copy_by_ref = 0;
a_chk->rec.chunk_id.id = type;
a_chk->rec.chunk_id.can_take_data = 1;
}
asoc->data_pkts_seen = 0;
a_chk->flags = 0;
a_chk->asoc = asoc;
a_chk->snd_count = 0;
a_chk->send_size = 0;
a_chk->sent = SCTP_DATAGRAM_UNSENT;
a_chk->whoTo = NULL;
if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) == 0) {
a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
if (a_chk->whoTo == NULL) {
a_chk->whoTo = asoc->last_data_chunk_from;
}
} else {
a_chk->whoTo = asoc->last_data_chunk_from;
}
if (a_chk->whoTo) {
atomic_add_int(&a_chk->whoTo->ref_count, 1);
}
if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
highest_tsn = asoc->highest_tsn_inside_map;
} else {
highest_tsn = asoc->highest_tsn_inside_nr_map;
}
if (highest_tsn == asoc->cumulative_tsn) {
if (type == SCTP_SELECTIVE_ACK) {
space_req = sizeof(struct sctp_sack_chunk);
} else {
space_req = sizeof(struct sctp_nr_sack_chunk);
}
} else {
space_req = MCLBYTES;
}
a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
if ((a_chk->data == NULL) ||
(a_chk->whoTo == NULL)) {
if (a_chk->data) {
sctp_m_freem(a_chk->data);
a_chk->data = NULL;
}
sctp_free_a_chunk(stcb, a_chk, so_locked);
if (stcb->asoc.delayed_ack) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL);
} else {
stcb->asoc.send_sack = 1;
}
return;
}
SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
}
limit = mtod(a_chk->data, caddr_t);
limit += space;
flags = 0;
if ((asoc->sctp_cmt_on_off > 0) &&
SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
flags |= (asoc->cmt_dac_pkts_rcvd << 6);
asoc->cmt_dac_pkts_rcvd = 0;
}
#ifdef SCTP_ASOCLOG_OF_TSNS
stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
stcb->asoc.cumack_log_atsnt++;
if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
stcb->asoc.cumack_log_atsnt = 0;
}
#endif
stcb->freed_by_sorcv_sincelast = 0;
if (type == SCTP_SELECTIVE_ACK) {
sack = mtod(a_chk->data, struct sctp_sack_chunk *);
nr_sack = NULL;
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
if (highest_tsn > asoc->mapping_array_base_tsn) {
siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
}
} else {
sack = NULL;
nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
}
}
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
offset = 1;
} else {
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
}
if (((type == SCTP_SELECTIVE_ACK) &&
SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
((type == SCTP_NR_SELECTIVE_ACK) &&
SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
for (i = 0; i < siz; i++) {
tsn_map = asoc->mapping_array[i];
if (type == SCTP_SELECTIVE_ACK) {
tsn_map |= asoc->nr_mapping_array[i];
}
if (i == 0) {
tsn_map &= (~0U << (1 - offset));
}
selector = &sack_array[tsn_map];
if (mergeable && selector->right_edge) {
num_gap_blocks--;
gap_descriptor--;
}
if (selector->num_entries == 0)
mergeable = 0;
else {
for (j = 0; j < selector->num_entries; j++) {
if (mergeable && selector->right_edge) {
mergeable = 0;
} else {
mergeable = 0;
gap_descriptor->start = htons((selector->gaps[j].start + offset));
}
gap_descriptor->end = htons((selector->gaps[j].end + offset));
num_gap_blocks++;
gap_descriptor++;
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
limit_reached = 1;
break;
}
}
if (selector->left_edge) {
mergeable = 1;
}
}
if (limit_reached) {
break;
}
offset += 8;
}
}
if ((type == SCTP_NR_SELECTIVE_ACK) &&
(limit_reached == 0)) {
mergeable = 0;
if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
}
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
offset = 1;
} else {
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
}
if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
for (i = 0; i < siz; i++) {
tsn_map = asoc->nr_mapping_array[i];
if (i == 0) {
tsn_map &= (~0U << (1 - offset));
}
selector = &sack_array[tsn_map];
if (mergeable && selector->right_edge) {
num_nr_gap_blocks--;
gap_descriptor--;
}
if (selector->num_entries == 0)
mergeable = 0;
else {
for (j = 0; j < selector->num_entries; j++) {
if (mergeable && selector->right_edge) {
mergeable = 0;
} else {
mergeable = 0;
gap_descriptor->start = htons((selector->gaps[j].start + offset));
}
gap_descriptor->end = htons((selector->gaps[j].end + offset));
num_nr_gap_blocks++;
gap_descriptor++;
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
limit_reached = 1;
break;
}
}
if (selector->left_edge) {
mergeable = 1;
}
}
if (limit_reached) {
break;
}
offset += 8;
}
}
}
if ((limit_reached == 0) && (asoc->numduptsns)) {
dup = (uint32_t *)gap_descriptor;
for (i = 0; i < asoc->numduptsns; i++) {
*dup = htonl(asoc->dup_tsns[i]);
dup++;
num_dups++;
if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
break;
}
}
asoc->numduptsns = 0;
}
if (type == SCTP_SELECTIVE_ACK) {
a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
num_dups * sizeof(int32_t));
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
sack->sack.a_rwnd = htonl(asoc->my_rwnd);
sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
sack->sack.num_dup_tsns = htons(num_dups);
sack->ch.chunk_type = type;
sack->ch.chunk_flags = flags;
sack->ch.chunk_length = htons(a_chk->send_size);
} else {
a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
num_dups * sizeof(int32_t));
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
nr_sack->nr_sack.reserved = 0;
nr_sack->ch.chunk_type = type;
nr_sack->ch.chunk_flags = flags;
nr_sack->ch.chunk_length = htons(a_chk->send_size);
}
TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
asoc->my_last_reported_rwnd = asoc->my_rwnd;
asoc->ctrl_queue_cnt++;
asoc->send_sack = 0;
SCTP_STAT_INCR(sctps_sendsacks);
return;
}
void
sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked)
{
struct mbuf *m_abort, *m, *m_last;
struct mbuf *m_out, *m_end = NULL;
struct sctp_abort_chunk *abort;
struct sctp_auth_chunk *auth = NULL;
struct sctp_nets *net;
uint32_t vtag;
uint32_t auth_offset = 0;
int error;
uint16_t cause_len, chunk_len, padding_len;
bool use_zero_crc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
stcb->asoc.peer_auth_chunks)) {
m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
stcb, SCTP_ABORT_ASSOCIATION);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else {
m_out = NULL;
}
switch (stcb->asoc.snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_abort == NULL) {
if (m_out) {
sctp_m_freem(m_out);
}
if (operr) {
sctp_m_freem(operr);
}
return;
}
SCTP_BUF_NEXT(m_abort) = operr;
cause_len = 0;
m_last = NULL;
for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
cause_len += (uint16_t)SCTP_BUF_LEN(m);
if (SCTP_BUF_NEXT(m) == NULL) {
m_last = m;
}
}
SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
if (m_out == NULL) {
SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
m_out = m_abort;
} else {
SCTP_BUF_NEXT(m_end) = m_abort;
}
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
abort = mtod(m_abort, struct sctp_abort_chunk *);
abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
if (stcb->asoc.peer_vtag == 0) {
vtag = stcb->asoc.my_vtag;
abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
} else {
vtag = stcb->asoc.peer_vtag;
abort->ch.chunk_flags = 0;
}
abort->ch.chunk_length = htons(chunk_len);
if (padding_len > 0) {
if ((m_last == NULL) ||
(sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
sctp_m_freem(m_out);
return;
}
}
if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
stcb->asoc.primary_destination->port, NULL,
0, 0,
use_zero_crc,
so_locked))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
void
sctp_send_shutdown_complete(struct sctp_tcb *stcb,
struct sctp_nets *net,
int reflect_vtag)
{
struct mbuf *m_shutdown_comp;
struct sctp_shutdown_complete_chunk *shutdown_complete;
uint32_t vtag;
int error;
uint8_t flags;
bool use_zero_crc;
m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown_comp == NULL) {
return;
}
if (reflect_vtag) {
flags = SCTP_HAD_NO_TCB;
vtag = stcb->asoc.my_vtag;
} else {
flags = 0;
vtag = stcb->asoc.peer_vtag;
}
switch (stcb->asoc.snd_edmid) {
case SCTP_EDMID_LOWER_LAYER_DTLS:
use_zero_crc = true;
break;
default:
use_zero_crc = false;
break;
}
shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
shutdown_complete->ch.chunk_flags = flags;
shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
stcb->sctp_ep->sctp_lport, stcb->rport,
htonl(vtag),
net->port, NULL,
0, 0,
use_zero_crc,
SCTP_SO_NOT_LOCKED))) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (error == ENOBUFS) {
stcb->asoc.ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
} else {
stcb->asoc.ifp_had_enobuf = 0;
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
return;
}
static void
sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag,
uint8_t type, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
struct mbuf *o_pak;
struct mbuf *mout;
struct sctphdr *shout;
struct sctp_chunkhdr *ch;
#if defined(INET) || defined(INET6)
struct udphdr *udp;
#endif
int ret, len, cause_len, padding_len;
#ifdef INET
struct sockaddr_in *src_sin, *dst_sin;
struct ip *ip;
#endif
#ifdef INET6
struct sockaddr_in6 *src_sin6, *dst_sin6;
struct ip6_hdr *ip6;
#endif
cause_len = 0;
if (cause != NULL) {
struct mbuf *m_at, *m_last = NULL;
for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
if (SCTP_BUF_NEXT(m_at) == NULL)
m_last = m_at;
cause_len += SCTP_BUF_LEN(m_at);
}
padding_len = cause_len % 4;
if (padding_len != 0) {
padding_len = 4 - padding_len;
}
if (padding_len != 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(cause);
return;
}
}
} else {
padding_len = 0;
}
len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
len += sizeof(struct ip);
break;
#endif
#ifdef INET6
case AF_INET6:
len += sizeof(struct ip6_hdr);
break;
#endif
default:
break;
}
#if defined(INET) || defined(INET6)
if (port) {
len += sizeof(struct udphdr);
}
#endif
mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
if (mout == NULL) {
if (cause) {
sctp_m_freem(cause);
}
return;
}
SCTP_BUF_RESV_UF(mout, max_linkhdr);
SCTP_BUF_LEN(mout) = len;
SCTP_BUF_NEXT(mout) = cause;
M_SETFIB(mout, fibnum);
mout->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(mout, mflowtype);
#ifdef INET
ip = NULL;
#endif
#ifdef INET6
ip6 = NULL;
#endif
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
src_sin = (struct sockaddr_in *)src;
dst_sin = (struct sockaddr_in *)dst;
ip = mtod(mout, struct ip *);
ip->ip_v = IPVERSION;
ip->ip_hl = (sizeof(struct ip) >> 2);
ip->ip_tos = 0;
ip->ip_off = htons(IP_DF);
ip_fillid(ip, V_ip_random_id);
ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
if (port) {
ip->ip_p = IPPROTO_UDP;
} else {
ip->ip_p = IPPROTO_SCTP;
}
ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
ip->ip_sum = 0;
len = sizeof(struct ip);
shout = (struct sctphdr *)((caddr_t)ip + len);
break;
#endif
#ifdef INET6
case AF_INET6:
src_sin6 = (struct sockaddr_in6 *)src;
dst_sin6 = (struct sockaddr_in6 *)dst;
ip6 = mtod(mout, struct ip6_hdr *);
ip6->ip6_flow = htonl(0x60000000);
if (V_ip6_auto_flowlabel) {
ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
}
ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
if (port) {
ip6->ip6_nxt = IPPROTO_UDP;
} else {
ip6->ip6_nxt = IPPROTO_SCTP;
}
ip6->ip6_src = dst_sin6->sin6_addr;
ip6->ip6_dst = src_sin6->sin6_addr;
len = sizeof(struct ip6_hdr);
shout = (struct sctphdr *)((caddr_t)ip6 + len);
break;
#endif
default:
len = 0;
shout = mtod(mout, struct sctphdr *);
break;
}
#if defined(INET) || defined(INET6)
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_m_freem(mout);
return;
}
udp = (struct udphdr *)shout;
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_sum = 0;
udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
sizeof(struct sctphdr) +
sizeof(struct sctp_chunkhdr) +
cause_len + padding_len));
len += sizeof(struct udphdr);
shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
} else {
udp = NULL;
}
#endif
shout->src_port = sh->dest_port;
shout->dest_port = sh->src_port;
shout->checksum = 0;
if (vtag) {
shout->v_tag = htonl(vtag);
} else {
shout->v_tag = sh->v_tag;
}
len += sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
ch->chunk_type = type;
if (vtag) {
ch->chunk_flags = 0;
} else {
ch->chunk_flags = SCTP_HAD_NO_TCB;
}
ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
len += sizeof(struct sctp_chunkhdr);
len += cause_len + padding_len;
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
sctp_m_freem(mout);
return;
}
SCTP_ATTACH_CHAIN(o_pak, mout, len);
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
if (port) {
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
}
ip->ip_len = htons(len);
if (port) {
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
mout->m_pkthdr.csum_flags = CSUM_SCTP;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
break;
#endif
#ifdef INET6
case AF_INET6:
ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
if (port) {
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
udp->uh_sum = 0xffff;
}
} else {
mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
break;
#endif
default:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
dst->sa_family);
sctp_m_freem(mout);
SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
if (port) {
UDPSTAT_INC(udps_opackets);
}
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
if (ret) {
SCTP_STAT_INCR(sctps_senderrors);
}
return;
}
void
sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
mflowtype, mflowid, fibnum,
vrf_id, port);
}
void
sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
{
struct sctp_tmit_chunk *chk;
struct sctp_heartbeat_chunk *hb;
struct timeval now;
SCTP_TCB_LOCK_ASSERT(stcb);
if (net == NULL) {
return;
}
(void)SCTP_GETTIME_TIMEVAL(&now);
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->send_size = sizeof(struct sctp_heartbeat_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, so_locked);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
hb->ch.chunk_flags = 0;
hb->ch.chunk_length = htons(chk->send_size);
hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
} else {
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
}
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
memcpy(hb->heartbeat.hb_info.address,
&net->ro._l_addr.sin.sin_addr,
sizeof(net->ro._l_addr.sin.sin_addr));
break;
#endif
#ifdef INET6
case AF_INET6:
memcpy(hb->heartbeat.hb_info.address,
&net->ro._l_addr.sin6.sin6_addr,
sizeof(net->ro._l_addr.sin6.sin6_addr));
break;
#endif
default:
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
sctp_free_a_chunk(stcb, chk, so_locked);
return;
break;
}
net->hb_responded = 0;
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
stcb->asoc.ctrl_queue_cnt++;
SCTP_STAT_INCR(sctps_sendheartbeat);
return;
}
void
sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
uint32_t high_tsn)
{
struct sctp_association *asoc;
struct sctp_ecne_chunk *ecne;
struct sctp_tmit_chunk *chk;
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
uint32_t cnt, ctsn;
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
ctsn = ntohl(ecne->tsn);
if (SCTP_TSN_GT(high_tsn, ctsn)) {
ecne->tsn = htonl(high_tsn);
SCTP_STAT_INCR(sctps_queue_upd_ecne);
}
cnt = ntohl(ecne->num_pkts_since_cwr);
cnt++;
ecne->num_pkts_since_cwr = htonl(cnt);
return;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
SCTP_STAT_INCR(sctps_queue_upd_ecne);
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ECN_ECHO;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->send_size = sizeof(struct sctp_ecne_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
stcb->asoc.ecn_echo_cnt_onq++;
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
ecne->ch.chunk_type = SCTP_ECN_ECHO;
ecne->ch.chunk_flags = 0;
ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
ecne->tsn = htonl(high_tsn);
ecne->num_pkts_since_cwr = htonl(1);
TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
struct mbuf *m, int len, int iphlen, int bad_crc)
{
struct sctp_association *asoc;
struct sctp_pktdrop_chunk *drp;
struct sctp_tmit_chunk *chk;
uint8_t *datap;
int was_trunc = 0;
int fullsz = 0;
long spc;
int offset;
struct sctp_chunkhdr *ch, chunk_buf;
unsigned int chk_length;
if (!stcb) {
return;
}
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->pktdrop_supported == 0) {
return;
}
if (stcb->sctp_socket == NULL) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
len -= iphlen;
chk->send_size = len;
offset = iphlen + sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *)&chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
break;
}
switch (ch->chunk_type) {
case SCTP_PACKET_DROPPED:
case SCTP_ABORT_ASSOCIATION:
case SCTP_INITIATION_ACK:
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
default:
break;
}
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *)&chunk_buf);
}
if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
min(stcb->asoc.smallest_mtu, MCLBYTES)) {
fullsz = len;
len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
was_trunc = 1;
}
chk->asoc = &stcb->asoc;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
jump_out:
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
if (drp == NULL) {
sctp_m_freem(chk->data);
chk->data = NULL;
goto jump_out;
}
chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
chk->book_size_scale = 0;
if (was_trunc) {
drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
drp->trunc_len = htons(fullsz);
chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
len = chk->send_size;
} else {
drp->ch.chunk_flags = 0;
drp->trunc_len = htons(0);
}
if (bad_crc) {
drp->ch.chunk_flags |= SCTP_BADCRC;
}
chk->send_size += sizeof(struct sctp_pktdrop_chunk);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (net) {
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else {
chk->whoTo = NULL;
}
drp->ch.chunk_type = SCTP_PACKET_DROPPED;
drp->ch.chunk_length = htons(chk->send_size);
spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
if (spc < 0) {
spc = 0;
}
drp->bottle_bw = htonl(spc);
if (asoc->my_rwnd) {
drp->current_onq = htonl(asoc->size_on_reasm_queue +
asoc->size_on_all_streams +
asoc->my_rwnd_control_len +
SCTP_SBAVAIL(&stcb->sctp_socket->so_rcv));
} else {
drp->current_onq = htonl(spc);
}
drp->reserved = 0;
datap = drp->data;
m_copydata(m, iphlen, len, (caddr_t)datap);
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
{
struct sctp_association *asoc;
struct sctp_cwr_chunk *cwr;
struct sctp_tmit_chunk *chk;
SCTP_TCB_LOCK_ASSERT(stcb);
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
uint32_t ctsn;
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
ctsn = ntohl(cwr->tsn);
if (SCTP_TSN_GT(high_tsn, ctsn)) {
cwr->tsn = htonl(high_tsn);
}
if (override & SCTP_CWR_REDUCE_OVERRIDE) {
cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
}
return;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ECN_CWR;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->asoc = asoc;
chk->send_size = sizeof(struct sctp_cwr_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
cwr->ch.chunk_type = SCTP_ECN_CWR;
cwr->ch.chunk_flags = override;
cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
cwr->tsn = htonl(high_tsn);
TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
static int
sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
{
uint16_t len, old_len, i;
struct sctp_stream_reset_out_request *req_out;
struct sctp_chunkhdr *ch;
int at;
int number_entries = 0;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
number_entries++;
}
}
if (number_entries == 0) {
return (0);
}
if (number_entries == stcb->asoc.streamoutcnt) {
number_entries = 0;
}
if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
}
len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
req_out->ph.param_length = htons(len);
req_out->request_seq = htonl(seq);
req_out->response_seq = htonl(resp_seq);
req_out->send_reset_at_tsn = htonl(last_sent);
at = 0;
if (number_entries) {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
req_out->list_of_streams[at] = htons(i);
at++;
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
if (at >= number_entries) {
break;
}
}
}
} else {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
}
}
if (SCTP_SIZE32(len) > len) {
req_out->list_of_streams[number_entries] = 0;
}
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return (1);
}
static void
sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
int number_entries, uint16_t *list,
uint32_t seq)
{
uint16_t len, old_len, i;
struct sctp_stream_reset_in_request *req_in;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
req_in->ph.param_length = htons(len);
req_in->request_seq = htonl(seq);
if (number_entries) {
for (i = 0; i < number_entries; i++) {
req_in->list_of_streams[i] = htons(list[i]);
}
}
if (SCTP_SIZE32(len) > len) {
req_in->list_of_streams[number_entries] = 0;
}
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
static void
sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
uint32_t seq)
{
uint16_t len, old_len;
struct sctp_stream_reset_tsn_request *req_tsn;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
len = sizeof(struct sctp_stream_reset_tsn_request);
req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
req_tsn->ph.param_length = htons(len);
req_tsn->request_seq = htonl(seq);
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
void
sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
uint32_t resp_seq, uint32_t result)
{
uint16_t len, old_len;
struct sctp_stream_reset_response *resp;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
len = sizeof(struct sctp_stream_reset_response);
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
resp->ph.param_length = htons(len);
resp->response_seq = htonl(resp_seq);
resp->result = ntohl(result);
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
void
sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
struct sctp_stream_reset_list *ent,
int response)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
asoc = &stcb->asoc;
asoc->last_reset_action[0] = response;
if (asoc->stream_reset_outstanding) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
atomic_add_int(&chk->whoTo->ref_count, 1);
SCTP_BUF_LEN(chk->data) = chk->send_size;
sctp_add_stream_reset_result(chk, ent->seq, response);
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
uint32_t resp_seq, uint32_t result,
uint32_t send_una, uint32_t recv_next)
{
uint16_t len, old_len;
struct sctp_stream_reset_response_tsn *resp;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
len = sizeof(struct sctp_stream_reset_response_tsn);
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
resp->ph.param_length = htons(len);
resp->response_seq = htonl(resp_seq);
resp->result = htonl(result);
resp->senders_next_tsn = htonl(send_una);
resp->receivers_next_tsn = htonl(recv_next);
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
static void
sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
uint32_t seq,
uint16_t adding)
{
uint16_t len, old_len;
struct sctp_chunkhdr *ch;
struct sctp_stream_reset_add_strm *addstr;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
len = sizeof(struct sctp_stream_reset_add_strm);
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
addstr->ph.param_length = htons(len);
addstr->request_seq = htonl(seq);
addstr->number_of_streams = htons(adding);
addstr->reserved = 0;
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
static void
sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
uint32_t seq,
uint16_t adding)
{
uint16_t len, old_len;
struct sctp_chunkhdr *ch;
struct sctp_stream_reset_add_strm *addstr;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
len = sizeof(struct sctp_stream_reset_add_strm);
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
addstr->ph.param_length = htons(len);
addstr->request_seq = htonl(seq);
addstr->number_of_streams = htons(adding);
addstr->reserved = 0;
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
int
sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
uint32_t seq;
asoc = &stcb->asoc;
asoc->trigger_reset = 0;
if (asoc->stream_reset_outstanding) {
return (EALREADY);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, so_locked);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
atomic_add_int(&chk->whoTo->ref_count, 1);
SCTP_BUF_LEN(chk->data) = chk->send_size;
seq = stcb->asoc.str_reset_seq_out;
if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
seq++;
asoc->stream_reset_outstanding++;
} else {
m_freem(chk->data);
chk->data = NULL;
sctp_free_a_chunk(stcb, chk, so_locked);
return (ENOENT);
}
asoc->str_reset = chk;
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
if (stcb->asoc.send_sack) {
sctp_send_sack(stcb, so_locked);
}
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
return (0);
}
int
sctp_send_str_reset_req(struct sctp_tcb *stcb,
uint16_t number_entries, uint16_t *list,
uint8_t send_in_req,
uint8_t send_tsn_req,
uint8_t add_stream,
uint16_t adding_o,
uint16_t adding_i, uint8_t peer_asked)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
int can_send_out_req = 0;
uint32_t seq;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
if (asoc->stream_reset_outstanding) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
return (EBUSY);
}
if ((send_in_req == 0) && (send_tsn_req == 0) &&
(add_stream == 0)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (send_tsn_req && send_in_req) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
} else if (send_in_req) {
can_send_out_req = 1;
}
if (number_entries > (MCLBYTES -
SCTP_MIN_OVERHEAD -
sizeof(struct sctp_chunkhdr) -
sizeof(struct sctp_stream_reset_out_request)) /
sizeof(uint16_t)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
atomic_add_int(&chk->whoTo->ref_count, 1);
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
seq = stcb->asoc.str_reset_seq_out;
if (can_send_out_req) {
int ret;
ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
if (ret) {
seq++;
asoc->stream_reset_outstanding++;
}
}
if ((add_stream & 1) &&
((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
struct sctp_stream_out *oldstream;
struct sctp_stream_queue_pending *sp, *nsp;
int i;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
oldstream = stcb->asoc.strmout;
SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
(stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
SCTP_M_STRMO);
if (stcb->asoc.strmout == NULL) {
uint8_t x;
stcb->asoc.strmout = oldstream;
x = add_stream & 0xfe;
add_stream = x;
goto skip_stuff;
}
stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, false);
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
stcb->asoc.strmout[i].abandoned_sent[j] = oldstream[i].abandoned_sent[j];
stcb->asoc.strmout[i].abandoned_unsent[j] = oldstream[i].abandoned_unsent[j];
}
#else
stcb->asoc.strmout[i].abandoned_sent[0] = oldstream[i].abandoned_sent[0];
stcb->asoc.strmout[i].abandoned_unsent[0] = oldstream[i].abandoned_unsent[0];
#endif
stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
stcb->asoc.strmout[i].sid = i;
stcb->asoc.strmout[i].state = oldstream[i].state;
TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
}
}
stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc);
for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.strmout[i].chunks_on_queues = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
}
#else
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
#endif
stcb->asoc.strmout[i].next_mid_ordered = 0;
stcb->asoc.strmout[i].next_mid_unordered = 0;
stcb->asoc.strmout[i].sid = i;
stcb->asoc.strmout[i].last_msg_incomplete = 0;
stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
}
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
SCTP_FREE(oldstream, SCTP_M_STRMO);
}
skip_stuff:
if ((add_stream & 1) && (adding_o > 0)) {
asoc->strm_pending_add_size = adding_o;
asoc->peer_req_out = peer_asked;
sctp_add_an_out_stream(chk, seq, adding_o);
seq++;
asoc->stream_reset_outstanding++;
}
if ((add_stream & 2) && (adding_i > 0)) {
sctp_add_an_in_stream(chk, seq, adding_i);
seq++;
asoc->stream_reset_outstanding++;
}
if (send_in_req) {
sctp_add_stream_reset_in(chk, number_entries, list, seq);
seq++;
asoc->stream_reset_outstanding++;
}
if (send_tsn_req) {
sctp_add_stream_reset_tsn(chk, seq);
asoc->stream_reset_outstanding++;
}
asoc->str_reset = chk;
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
if (stcb->asoc.send_sack) {
sctp_send_sack(stcb, SCTP_SO_LOCKED);
}
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
return (0);
}
void
sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
if (cause)
sctp_m_freem(cause);
return;
}
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
mflowtype, mflowid, fibnum,
vrf_id, port);
return;
}
void
sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
mflowtype, mflowid, fibnum,
vrf_id, port);
return;
}
static struct mbuf *
sctp_copy_resume(struct uio *uio,
int max_send_len,
int user_marks_eor,
int *error,
uint32_t *sndout,
struct mbuf **new_tail)
{
struct mbuf *m;
m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
(M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
if (m == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
*error = EFAULT;
} else {
*sndout = m_length(m, NULL);
*new_tail = m_last(m);
}
return (m);
}
static int
sctp_copy_one(struct sctp_stream_queue_pending *sp,
struct uio *uio,
int resv_upfront)
{
sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, resv_upfront, 0);
if (sp->data == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return (EFAULT);
}
sp->tail_mbuf = m_last(sp->data);
return (0);
}
static struct sctp_stream_queue_pending *
sctp_copy_it_in(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_nonpad_sndrcvinfo *srcv,
struct uio *uio,
struct sctp_nets *net,
ssize_t max_send_len,
int user_marks_eor,
int *error)
{
struct sctp_stream_queue_pending *sp;
int resv_in_first;
*error = 0;
sctp_alloc_a_strmoq(stcb, sp);
if (sp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
*error = ENOMEM;
goto out_now;
}
sp->act_flags = 0;
sp->sender_all_done = 0;
sp->sinfo_flags = srcv->sinfo_flags;
sp->timetolive = srcv->sinfo_timetolive;
sp->ppid = srcv->sinfo_ppid;
sp->context = srcv->sinfo_context;
sp->fsn = 0;
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
sp->sid = srcv->sinfo_stream;
sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
if ((sp->length == (uint32_t)uio->uio_resid) &&
((user_marks_eor == 0) ||
(srcv->sinfo_flags & SCTP_EOF) ||
(user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
sp->msg_is_complete = 1;
} else {
sp->msg_is_complete = 0;
}
sp->sender_all_done = 0;
sp->some_taken = 0;
sp->put_last_out = 0;
resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
sp->data = sp->tail_mbuf = NULL;
if (sp->length == 0) {
goto skip_copy;
}
if (srcv->sinfo_keynumber_valid) {
sp->auth_keyid = srcv->sinfo_keynumber;
} else {
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
}
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
sctp_auth_key_acquire(stcb, sp->auth_keyid);
sp->holds_key_ref = 1;
}
*error = sctp_copy_one(sp, uio, resv_in_first);
skip_copy:
if (*error) {
sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
sp = NULL;
} else {
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
sp->net = net;
atomic_add_int(&sp->net->ref_count, 1);
} else {
sp->net = NULL;
}
sctp_set_prsctp_policy(sp);
}
out_now:
return (sp);
}
int
sctp_sosend(struct socket *so,
struct sockaddr *addr,
struct uio *uio,
struct mbuf *top,
struct mbuf *control,
int flags,
struct thread *p)
{
struct sctp_sndrcvinfo sndrcvninfo;
#if defined(INET) && defined(INET6)
struct sockaddr_in sin;
#endif
struct sockaddr *addr_to_use;
int error;
bool use_sndinfo;
if (control != NULL) {
use_sndinfo = sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, sizeof(sndrcvninfo));
} else {
use_sndinfo = false;
}
#if defined(INET) && defined(INET6)
if ((addr != NULL) && (addr->sa_family == AF_INET6)) {
struct sockaddr_in6 *sin6;
if (addr->sa_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
sin6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
in6_sin6_2_sin(&sin, sin6);
addr_to_use = (struct sockaddr *)&sin;
} else {
addr_to_use = addr;
}
} else {
addr_to_use = addr;
}
#else
addr_to_use = addr;
#endif
error = sctp_lower_sosend(so, addr_to_use, uio, top, control, flags,
use_sndinfo ? &sndrcvninfo : NULL, p);
return (error);
}
int
sctp_lower_sosend(struct socket *so,
struct sockaddr *addr,
struct uio *uio,
struct mbuf *top,
struct mbuf *control,
int flags,
struct sctp_sndrcvinfo *srcv,
struct thread *p)
{
struct sctp_nonpad_sndrcvinfo sndrcvninfo_buf;
struct epoch_tracker et;
struct timeval now;
struct sctp_block_entry be;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb = NULL;
struct sctp_nets *net;
struct sctp_association *asoc;
struct sctp_inpcb *t_inp;
struct sctp_nonpad_sndrcvinfo *sndrcvninfo;
ssize_t sndlen = 0, max_len, local_add_more;
ssize_t local_soresv = 0;
sctp_assoc_t sinfo_assoc_id;
int user_marks_eor;
int nagle_applies = 0;
int error;
int queue_only = 0, queue_only_for_init = 0;
int un_sent;
int now_filled = 0;
unsigned int inqueue_bytes = 0;
uint16_t port;
uint16_t sinfo_flags;
uint16_t sinfo_stream;
bool create_lock_applied = false;
bool free_cnt_applied = false;
bool some_on_control;
bool got_all_of_the_send = false;
bool non_blocking = false;
error = 0;
net = NULL;
stcb = NULL;
if ((uio == NULL) && (top == NULL)) {
error = EINVAL;
goto out_unlocked;
}
if (addr != NULL) {
union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
switch (raddr->sa.sa_family) {
#ifdef INET
case AF_INET:
if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
error = EINVAL;
goto out_unlocked;
}
port = raddr->sin.sin_port;
break;
#endif
#ifdef INET6
case AF_INET6:
if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
error = EINVAL;
goto out_unlocked;
}
port = raddr->sin6.sin6_port;
break;
#endif
default:
error = EAFNOSUPPORT;
goto out_unlocked;
}
} else {
port = 0;
}
if (uio != NULL) {
if (uio->uio_resid < 0) {
error = EINVAL;
goto out_unlocked;
}
sndlen = uio->uio_resid;
} else {
sndlen = SCTP_HEADER_LEN(top);
}
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zd\n",
(void *)addr, sndlen);
t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
error = EINVAL;
goto out_unlocked;
}
user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
if ((uio == NULL) && (user_marks_eor != 0)) {
error = EINVAL;
goto out_unlocked;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
SCTP_IS_LISTENING(inp)) {
error = EINVAL;
goto out_unlocked;
}
atomic_add_int(&inp->total_sends, 1);
if (srcv != NULL) {
sndrcvninfo = (struct sctp_nonpad_sndrcvinfo *)srcv;
sinfo_assoc_id = sndrcvninfo->sinfo_assoc_id;
sinfo_flags = sndrcvninfo->sinfo_flags;
if (INVALID_SINFO_FLAG(sinfo_flags) ||
PR_SCTP_INVALID_POLICY(sinfo_flags)) {
error = EINVAL;
goto out_unlocked;
}
if (sinfo_flags != 0) {
SCTP_STAT_INCR(sctps_sends_with_flags);
}
} else {
sndrcvninfo = NULL;
sinfo_flags = inp->def_send.sinfo_flags;
sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
}
if (flags & MSG_EOR) {
sinfo_flags |= SCTP_EOR;
}
if (flags & MSG_EOF) {
sinfo_flags |= SCTP_EOF;
}
if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
error = EINVAL;
goto out_unlocked;
}
SCTP_INP_RLOCK(inp);
if ((sinfo_flags & SCTP_SENDALL) &&
(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
SCTP_INP_RUNLOCK(inp);
error = sctp_sendall(inp, uio, top, sndrcvninfo);
top = NULL;
goto out_unlocked;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb != NULL) {
SCTP_TCB_LOCK(stcb);
}
SCTP_INP_RUNLOCK(inp);
} else if (sinfo_assoc_id > SCTP_ALL_ASSOC) {
stcb = sctp_findasoc_ep_asocid_locked(inp, sinfo_assoc_id, 1);
SCTP_INP_RUNLOCK(inp);
if (stcb != NULL) {
SCTP_TCB_LOCK_ASSERT(stcb);
}
} else if (addr != NULL) {
SCTP_INP_INCR_REF(inp);
SCTP_INP_RUNLOCK(inp);
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
if (stcb == NULL) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
} else {
SCTP_TCB_LOCK_ASSERT(stcb);
}
} else {
SCTP_INP_RUNLOCK(inp);
}
#ifdef INVARIANTS
if (stcb != NULL) {
SCTP_TCB_LOCK_ASSERT(stcb);
}
#endif
if ((stcb == NULL) && (addr != NULL)) {
SCTP_ASOC_CREATE_LOCK(inp);
create_lock_applied = true;
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
error = EINVAL;
goto out_unlocked;
}
if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
(addr->sa_family == AF_INET6)) {
error = EINVAL;
goto out_unlocked;
}
SCTP_INP_WLOCK(inp);
SCTP_INP_INCR_REF(inp);
SCTP_INP_WUNLOCK(inp);
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
#if defined(INET) || defined(INET6)
if ((stcb == NULL) && (control != NULL) && (port > 0)) {
stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
}
#endif
if (stcb == NULL) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
} else {
SCTP_TCB_LOCK_ASSERT(stcb);
SCTP_ASOC_CREATE_UNLOCK(inp);
create_lock_applied = false;
}
if (error != 0) {
goto out_unlocked;
}
if (t_inp != inp) {
error = ENOTCONN;
goto out_unlocked;
}
}
if (stcb == NULL) {
if (addr == NULL) {
error = ENOENT;
goto out_unlocked;
} else {
uint32_t vrf_id;
if ((sinfo_flags & SCTP_ABORT) ||
((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
error = ENOENT;
goto out_unlocked;
}
vrf_id = inp->def_vrf_id;
KASSERT(create_lock_applied, ("create_lock_applied is false"));
stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id,
inp->sctp_ep.pre_open_stream_count,
inp->sctp_ep.port,
p,
SCTP_INITIALIZE_AUTH_PARAMS);
if (stcb == NULL) {
KASSERT(error != 0, ("error is 0 although stcb is NULL"));
goto out_unlocked;
}
SCTP_TCB_LOCK_ASSERT(stcb);
SCTP_ASOC_CREATE_UNLOCK(inp);
create_lock_applied = false;
queue_only = 1;
SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
if (control != NULL) {
if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
stcb = NULL;
KASSERT(error != 0,
("error is 0 although sctp_process_cmsgs_for_init() indicated an error"));
goto out_unlocked;
}
}
queue_only_for_init = 1;
}
}
KASSERT(!create_lock_applied, ("create_lock_applied is true"));
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out_unlocked;
}
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
queue_only = 1;
}
atomic_add_int(&asoc->refcnt, 1);
free_cnt_applied = true;
if (sndrcvninfo == NULL) {
sndrcvninfo_buf = asoc->def_send;
sndrcvninfo = &sndrcvninfo_buf;
sinfo_flags = sndrcvninfo->sinfo_flags;
if (flags & MSG_EOR) {
sinfo_flags |= SCTP_EOR;
}
if (flags & MSG_EOF) {
sinfo_flags |= SCTP_EOF;
}
}
if (sinfo_flags & SCTP_ABORT) {
struct mbuf *mm;
struct sctp_paramhdr *ph;
ssize_t tot_demand, tot_out = 0, max_out;
SCTP_STAT_INCR(sctps_sends_with_abort);
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
error = EINVAL;
goto out_unlocked;
}
if (top != NULL) {
struct mbuf *cntm;
if (sndlen != 0) {
for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
tot_out += SCTP_BUF_LEN(cntm);
}
}
mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
} else {
tot_out = sndlen;
tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
error = EMSGSIZE;
goto out_unlocked;
}
mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_NOWAIT, 1, MT_DATA);
}
if (mm == NULL) {
error = ENOMEM;
goto out_unlocked;
}
max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
max_out -= sizeof(struct sctp_abort_msg);
if (tot_out > max_out) {
tot_out = max_out;
}
ph = mtod(mm, struct sctp_paramhdr *);
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
ph++;
SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
if (top == NULL) {
SCTP_TCB_UNLOCK(stcb);
error = uiomove((caddr_t)ph, (int)tot_out, uio);
SCTP_TCB_LOCK(stcb);
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
sctp_m_freem(mm);
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out_unlocked;
}
if (error != 0) {
sctp_m_freem(mm);
mm = NULL;
error = 0;
}
} else {
if (sndlen != 0) {
SCTP_BUF_NEXT(mm) = top;
}
}
atomic_subtract_int(&asoc->refcnt, 1);
free_cnt_applied = false;
NET_EPOCH_ENTER(et);
sctp_abort_an_association(stcb->sctp_ep, stcb, mm, false, SCTP_SO_LOCKED);
NET_EPOCH_EXIT(et);
stcb = NULL;
if (sndlen != 0) {
top = NULL;
}
goto out_unlocked;
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if (sinfo_flags & SCTP_ADDR_OVER) {
if (addr != NULL) {
net = sctp_findnet(stcb, addr);
} else {
net = NULL;
}
if ((net == NULL) ||
((port != 0) && (port != stcb->rport))) {
error = EINVAL;
goto out_unlocked;
}
} else {
if (asoc->alternate != NULL) {
net = asoc->alternate;
} else {
net = asoc->primary_destination;
}
}
if (sndlen == 0) {
if (sinfo_flags & SCTP_EOF) {
got_all_of_the_send = true;
goto dataless_eof;
} else {
error = EINVAL;
goto out_unlocked;
}
}
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
if (sndlen > (ssize_t)asoc->smallest_mtu) {
error = EMSGSIZE;
goto out_unlocked;
}
}
sinfo_stream = sndrcvninfo->sinfo_stream;
if (sinfo_stream >= asoc->streamoutcnt) {
error = EINVAL;
goto out_unlocked;
}
if ((asoc->strmout[sinfo_stream].state != SCTP_STREAM_OPEN) &&
(asoc->strmout[sinfo_stream].state != SCTP_STREAM_OPENING)) {
if (asoc->strmout[sinfo_stream].state > SCTP_STREAM_OPEN) {
error = EAGAIN;
} else {
error = EINVAL;
}
goto out_unlocked;
}
atomic_add_int(&stcb->total_sends, 1);
if (SCTP_SO_IS_NBIO(so) || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0) {
non_blocking = true;
}
if (non_blocking) {
ssize_t amount;
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (user_marks_eor == 0) {
amount = sndlen;
} else {
amount = 1;
}
if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + asoc->sb_send_resv)) ||
(asoc->chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
if ((sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so)) &&
(user_marks_eor == 0)) {
error = EMSGSIZE;
} else {
error = EWOULDBLOCK;
}
goto out_unlocked;
}
}
atomic_add_int(&asoc->sb_send_resv, (int)sndlen);
local_soresv = sndlen;
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if (p != NULL) {
p->td_ru.ru_msgsnd++;
}
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
} else {
max_len = 0;
}
if ((user_marks_eor == 0) &&
(sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
error = EMSGSIZE;
goto out_unlocked;
}
if (user_marks_eor != 0) {
local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
} else {
local_add_more = sndlen;
}
if (non_blocking) {
goto skip_preblock;
}
if (((max_len <= local_add_more) && ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
(max_len == 0) ||
((asoc->chunks_on_out_queue + asoc->stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
SOCKBUF_LOCK(&so->so_snd);
while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
((asoc->stream_queue_cnt + asoc->chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
(unsigned int)SCTP_SB_LIMIT_SND(so),
inqueue_bytes,
local_add_more,
asoc->stream_queue_cnt,
asoc->chunks_on_out_queue,
SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
}
be.error = 0;
stcb->block_entry = &be;
SCTP_TCB_UNLOCK(stcb);
error = sbwait(so, SO_SND);
if (error == 0) {
if (so->so_error != 0) {
error = so->so_error;
}
if (be.error != 0) {
error = be.error;
}
}
SOCKBUF_UNLOCK(&so->so_snd);
SCTP_TCB_LOCK(stcb);
stcb->block_entry = NULL;
if (error != 0) {
goto out_unlocked;
}
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out_unlocked;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
asoc, asoc->total_output_queue_size);
}
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
SOCKBUF_LOCK(&so->so_snd);
}
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
} else {
max_len = 0;
}
SOCKBUF_UNLOCK(&so->so_snd);
}
skip_preblock:
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if (top == NULL) {
struct sctp_stream_queue_pending *sp;
struct sctp_stream_out *strm;
uint32_t sndout;
if ((asoc->stream_locked) &&
(asoc->stream_locked_on != sinfo_stream)) {
error = EINVAL;
goto out;
}
strm = &asoc->strmout[sinfo_stream];
if (strm->last_msg_incomplete == 0) {
do_a_copy_in:
SCTP_TCB_UNLOCK(stcb);
sp = sctp_copy_it_in(stcb, asoc, sndrcvninfo, uio, net, max_len, user_marks_eor, &error);
SCTP_TCB_LOCK(stcb);
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out;
}
if (error != 0) {
goto out;
}
if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
if (sp->data != 0) {
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
sp->length = 0;
}
if (sp->net != NULL) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
error = EPIPE;
goto out_unlocked;
}
strm = &asoc->strmout[sinfo_stream];
if (sp->msg_is_complete) {
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
} else {
strm->last_msg_incomplete = 1;
if (asoc->idata_supported == 0) {
asoc->stream_locked = 1;
asoc->stream_locked_on = sinfo_stream;
}
sp->sender_all_done = 0;
}
sctp_snd_sb_alloc(stcb, sp->length);
atomic_add_int(&asoc->stream_queue_cnt, 1);
if (sinfo_flags & SCTP_UNORDERED) {
SCTP_STAT_INCR(sctps_sends_with_unord);
}
sp->processing = 1;
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
asoc->ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp);
} else {
sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
if (sp == NULL) {
#ifdef INVARIANTS
panic("Warning: Last msg marked incomplete, yet nothing left?");
#else
SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
strm->last_msg_incomplete = 0;
#endif
goto do_a_copy_in;
}
if (sp->processing != 0) {
error = EINVAL;
goto out;
} else {
sp->processing = 1;
}
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
while (uio->uio_resid > 0) {
struct mbuf *new_tail, *mm;
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
} else {
max_len = 0;
}
if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
((max_len > 0) && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
(uio->uio_resid <= max_len)) {
SCTP_TCB_UNLOCK(stcb);
sndout = 0;
new_tail = NULL;
mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
SCTP_TCB_LOCK(stcb);
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
sctp_m_freem(mm);
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out;
}
if ((mm == NULL) || (error != 0)) {
if (mm != NULL) {
sctp_m_freem(mm);
}
if (sp != NULL) {
sp->processing = 0;
}
goto out;
}
if (sp->tail_mbuf != NULL) {
SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
} else {
sp->data = mm;
}
sp->tail_mbuf = new_tail;
sctp_snd_sb_alloc(stcb, sndout);
atomic_add_int(&sp->length, sndout);
if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
}
if ((uio->uio_resid == 0) &&
((user_marks_eor == 0) ||
(sinfo_flags & SCTP_EOF) ||
(user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
sp->msg_is_complete = 1;
} else {
sp->msg_is_complete = 0;
}
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if (uio->uio_resid == 0) {
continue;
}
if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
sctp_prune_prsctp(stcb, asoc, sndrcvninfo, (int)sndlen);
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
else
max_len = 0;
if (max_len > 0) {
continue;
}
}
if (non_blocking) {
if (sp != NULL) {
sp->processing = 0;
}
goto skip_out_eof;
}
if (queue_only_for_init) {
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
queue_only = 0;
} else {
NET_EPOCH_ENTER(et);
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
NET_EPOCH_EXIT(et);
SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
queue_only = 1;
}
}
if ((net->flight_size > net->cwnd) &&
(asoc->sctp_cmt_on_off == 0)) {
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
queue_only = 1;
} else if (asoc->ifp_had_enobuf) {
SCTP_STAT_INCR(sctps_ifnomemqueued);
if (net->flight_size > (2 * net->mtu)) {
queue_only = 1;
}
asoc->ifp_had_enobuf = 0;
}
un_sent = asoc->total_output_queue_size - asoc->total_flight;
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(asoc->total_flight > 0) &&
(asoc->stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
(un_sent < (int)(asoc->smallest_mtu - SCTP_MIN_OVERHEAD))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
}
SCTP_STAT_INCR(sctps_naglequeued);
nagle_applies = 1;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
}
SCTP_STAT_INCR(sctps_naglesent);
nagle_applies = 0;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
nagle_applies, un_sent);
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, asoc->total_output_queue_size,
asoc->total_flight,
asoc->chunks_on_out_queue, asoc->total_flight_count);
}
if (queue_only_for_init) {
queue_only_for_init = 0;
}
if ((queue_only == 0) && (nagle_applies == 0)) {
NET_EPOCH_ENTER(et);
sctp_chunk_output(inp, stcb,
SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
NET_EPOCH_EXIT(et);
}
inqueue_bytes = asoc->total_output_queue_size - (asoc->chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
SOCKBUF_LOCK(&so->so_snd);
if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
asoc, uio->uio_resid);
}
be.error = 0;
stcb->block_entry = &be;
SCTP_TCB_UNLOCK(stcb);
error = sbwait(so, SO_SND);
if (error == 0) {
if (so->so_error != 0)
error = so->so_error;
if (be.error != 0) {
error = be.error;
}
}
SOCKBUF_UNLOCK(&so->so_snd);
SCTP_TCB_LOCK(stcb);
stcb->block_entry = NULL;
if ((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
(asoc->state & SCTP_STATE_WAS_ABORTED)) {
if (asoc->state & SCTP_STATE_WAS_ABORTED) {
error = ECONNRESET;
} else {
error = ENOTCONN;
}
goto out_unlocked;
}
if (error != 0) {
if (sp != NULL) {
sp->processing = 0;
}
goto out_unlocked;
}
} else {
SOCKBUF_UNLOCK(&so->so_snd);
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
asoc, asoc->total_output_queue_size);
}
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
strm = &asoc->strmout[sinfo_stream];
if (sp != NULL) {
if (sp->msg_is_complete == 0) {
strm->last_msg_incomplete = 1;
if (asoc->idata_supported == 0) {
asoc->stream_locked = 1;
asoc->stream_locked_on = sinfo_stream;
}
} else {
sp->sender_all_done = 1;
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
}
sp->processing = 0;
} else {
SCTP_PRINTF("Huh no sp TSNH?\n");
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
}
if (uio->uio_resid == 0) {
got_all_of_the_send = true;
}
} else {
error = sctp_msg_append(stcb, net, top, sndrcvninfo);
top = NULL;
if ((sinfo_flags & SCTP_EOF) != 0) {
got_all_of_the_send = true;
}
}
if (error != 0) {
goto out;
}
dataless_eof:
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if ((sinfo_flags & SCTP_EOF) && got_all_of_the_send) {
SCTP_STAT_INCR(sctps_sends_with_eof);
error = 0;
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
goto abort_anyway;
}
if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
struct sctp_nets *netp;
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
sctp_stop_timers_for_shutdown(stcb);
if (asoc->alternate != NULL) {
netp = asoc->alternate;
} else {
netp = asoc->primary_destination;
}
sctp_send_shutdown(stcb, netp);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
netp);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
NULL);
}
} else {
if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
}
SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
abort_anyway:
if (free_cnt_applied) {
atomic_subtract_int(&asoc->refcnt, 1);
free_cnt_applied = false;
}
SCTP_SNPRINTF(msg, sizeof(msg),
"%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
NET_EPOCH_ENTER(et);
sctp_abort_an_association(stcb->sctp_ep, stcb,
op_err, false, SCTP_SO_LOCKED);
NET_EPOCH_EXIT(et);
stcb = NULL;
error = ECONNABORTED;
goto out;
}
sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
}
}
}
skip_out_eof:
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
some_on_control = !TAILQ_EMPTY(&asoc->control_send_queue);
if (queue_only_for_init) {
if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
queue_only = 0;
} else {
NET_EPOCH_ENTER(et);
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
NET_EPOCH_EXIT(et);
SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
queue_only = 1;
}
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
if ((net->flight_size > net->cwnd) &&
(asoc->sctp_cmt_on_off == 0)) {
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
queue_only = 1;
} else if (asoc->ifp_had_enobuf) {
SCTP_STAT_INCR(sctps_ifnomemqueued);
if (net->flight_size > (2 * net->mtu)) {
queue_only = 1;
}
asoc->ifp_had_enobuf = 0;
}
un_sent = asoc->total_output_queue_size - asoc->total_flight;
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(asoc->total_flight > 0) &&
(asoc->stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
(un_sent < (int)(asoc->smallest_mtu - SCTP_MIN_OVERHEAD))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
}
SCTP_STAT_INCR(sctps_naglequeued);
nagle_applies = 1;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
}
SCTP_STAT_INCR(sctps_naglesent);
nagle_applies = 0;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
nagle_applies, un_sent);
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, asoc->total_output_queue_size,
asoc->total_flight,
asoc->chunks_on_out_queue, asoc->total_flight_count);
}
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
NET_EPOCH_ENTER(et);
if ((queue_only == 0) && (nagle_applies == 0) && (asoc->peers_rwnd && un_sent)) {
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
} else if ((queue_only == 0) &&
(asoc->peers_rwnd == 0) &&
(asoc->total_flight == 0)) {
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
} else if (some_on_control) {
int num_out, reason;
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out,
&reason, 1, 1, &now, &now_filled,
sctp_get_frag_point(stcb),
SCTP_SO_LOCKED);
}
NET_EPOCH_EXIT(et);
SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
queue_only, asoc->peers_rwnd, un_sent,
asoc->total_flight, asoc->chunks_on_out_queue,
asoc->total_output_queue_size, error);
KASSERT(stcb != NULL, ("stcb is NULL"));
SCTP_TCB_LOCK_ASSERT(stcb);
KASSERT((asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0,
("Association about to be freed"));
KASSERT((asoc->state & SCTP_STATE_WAS_ABORTED) == 0,
("Association was aborted"));
out:
out_unlocked:
if (create_lock_applied) {
SCTP_ASOC_CREATE_UNLOCK(inp);
}
if (stcb != NULL) {
if (local_soresv) {
atomic_subtract_int(&asoc->sb_send_resv, (int)sndlen);
}
if (free_cnt_applied) {
atomic_subtract_int(&asoc->refcnt, 1);
}
SCTP_TCB_UNLOCK(stcb);
}
if (top != NULL) {
sctp_m_freem(top);
}
if (control != NULL) {
sctp_m_freem(control);
}
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
return (error);
}
struct mbuf *
sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
struct sctp_auth_chunk **auth_ret, uint32_t *offset,
struct sctp_tcb *stcb, uint8_t chunk)
{
struct mbuf *m_auth;
struct sctp_auth_chunk *auth;
int chunk_len;
struct mbuf *cn;
if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
(stcb == NULL))
return (m);
if (stcb->asoc.auth_supported == 0) {
return (m);
}
if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
return (m);
}
m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
if (m_auth == NULL) {
return (m);
}
if (m == NULL)
SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
auth = mtod(m_auth, struct sctp_auth_chunk *);
memset(auth, 0, sizeof(*auth));
auth->ch.chunk_type = SCTP_AUTHENTICATION;
auth->ch.chunk_flags = 0;
chunk_len = sizeof(*auth) +
sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
auth->ch.chunk_length = htons(chunk_len);
auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
*offset = 0;
for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
*offset += SCTP_BUF_LEN(cn);
}
SCTP_BUF_LEN(m_auth) = chunk_len;
m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
if (auth_ret != NULL)
*auth_ret = auth;
return (m);
}
#ifdef INET6
int
sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
{
struct nd_prefix *pfx = NULL;
struct nd_pfxrouter *pfxrtr = NULL;
struct sockaddr_in6 gw6;
if (ro == NULL || ro->ro_nh == NULL || src6->sin6_family != AF_INET6)
return (0);
ND6_RLOCK();
LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
if (pfx->ndpr_stateflags & NDPRF_DETACHED)
continue;
if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
&src6->sin6_addr, &pfx->ndpr_mask))
break;
}
if (pfx == NULL) {
ND6_RUNLOCK();
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
return (0);
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
memset(&gw6, 0, sizeof(struct sockaddr_in6));
gw6.sin6_family = AF_INET6;
gw6.sin6_len = sizeof(struct sockaddr_in6);
memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
sizeof(struct in6_addr));
SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
if (sctp_cmpaddr((struct sockaddr *)&gw6, &ro->ro_nh->gw_sa)) {
ND6_RUNLOCK();
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
return (1);
}
}
ND6_RUNLOCK();
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
return (0);
}
#endif
int
sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
{
#ifdef INET
struct sockaddr_in *sin, *mask;
struct ifaddr *ifa;
struct in_addr srcnetaddr, gwnetaddr;
if (ro == NULL || ro->ro_nh == NULL ||
sifa->address.sa.sa_family != AF_INET) {
return (0);
}
ifa = (struct ifaddr *)sifa->ifa;
mask = (struct sockaddr_in *)(ifa->ifa_netmask);
sin = &sifa->address.sin;
srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "match_nexthop4: src address is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "network address is %x\n", srcnetaddr.s_addr);
sin = &ro->ro_nh->gw4_sa;
gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "match_nexthop4: nexthop is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "network address is %x\n", gwnetaddr.s_addr);
if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
return (1);
}
#endif
return (0);
}
