#include "opt_inet.h"
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/socketops.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/domain.h>
#include <sys/thread2.h>
#include <sys/msgport2.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/netisr2.h>
#include <net/netmsg2.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/mld6_var.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/nd6.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/ip6protosw.h>
#include <net/net_osdep.h>
#ifdef HAVE_NRL_INPCB
#define in6pcb inpcb
#define in6p_laddr inp_laddr6
#define in6p_faddr inp_faddr6
#define in6p_icmp6filt inp_icmp6filt
#define in6p_route inp_route
#define in6p_socket inp_socket
#define in6p_flags inp_flags
#define in6p_moptions inp_moptions6
#define in6p_outputopts inp_outputopts6
#define in6p_ip6 inp_ipv6
#define in6p_flowinfo inp_flowinfo
#define in6p_next inp_next
#define in6p_prev inp_prev
#define in6_pcbdetach in_pcbdetach
#define in6_rtchange in_rtchange
#define in6p_ip6_nxt inp_ipv6.ip6_nxt
#endif
#define ICMP6_FASTTIMO (hz / PR_FASTHZ)
#define HAVE_PPSRATECHECK
extern struct domain inet6domain;
extern struct protosw inet6sw[];
extern u_char ip6_protox[];
struct icmp6stat icmp6stat;
extern struct inpcbinfo ripcbinfo;
extern int icmp6errppslim;
static int icmp6errpps_count = 0;
static struct timeval icmp6errppslim_last;
extern int icmp6_nodeinfo;
static void icmp6_errcount (struct icmp6errstat *, int, int);
static int icmp6_rip6_input (struct mbuf **, int);
static int icmp6_ratelimit (const struct in6_addr *, const int, const int);
static const char *icmp6_redirect_diag (struct in6_addr *,
struct in6_addr *, struct in6_addr *);
#ifndef HAVE_PPSRATECHECK
static int ppsratecheck (struct timeval *, int *, int);
#endif
static struct mbuf *ni6_input (struct mbuf *, int);
static struct mbuf *ni6_nametodns (const char *, int, int);
static int ni6_dnsmatch (const char *, int, const char *, int);
static int ni6_addrs (struct icmp6_nodeinfo *, struct mbuf *,
struct ifnet **, char *);
static int ni6_store_addrs (struct icmp6_nodeinfo *, struct icmp6_nodeinfo *,
struct ifnet *, int);
static int icmp6_notify_error (struct mbuf *, int, int, int);
static void icmp6_fasttimo(void *);
static void icmp6_fasttimo_dispatch(netmsg_t);
#ifdef COMPAT_RFC1885
static struct route_in6 icmp6_reflect_rt;
#endif
static struct callout icmp6_fasttimo_ch;
static struct netmsg_base icmp6_fasttimo_nmsg;
void
icmp6_init(void)
{
mld6_init();
callout_init_mp(&icmp6_fasttimo_ch);
netmsg_init(&icmp6_fasttimo_nmsg, NULL, &netisr_adone_rport,
MSGF_PRIORITY, icmp6_fasttimo_dispatch);
callout_reset_bycpu(&icmp6_fasttimo_ch, ICMP6_FASTTIMO,
icmp6_fasttimo, NULL, 0);
}
static void
icmp6_errcount(struct icmp6errstat *stat, int type, int code)
{
switch (type) {
case ICMP6_DST_UNREACH:
switch (code) {
case ICMP6_DST_UNREACH_NOROUTE:
stat->icp6errs_dst_unreach_noroute++;
return;
case ICMP6_DST_UNREACH_ADMIN:
stat->icp6errs_dst_unreach_admin++;
return;
case ICMP6_DST_UNREACH_BEYONDSCOPE:
stat->icp6errs_dst_unreach_beyondscope++;
return;
case ICMP6_DST_UNREACH_ADDR:
stat->icp6errs_dst_unreach_addr++;
return;
case ICMP6_DST_UNREACH_NOPORT:
stat->icp6errs_dst_unreach_noport++;
return;
}
break;
case ICMP6_PACKET_TOO_BIG:
stat->icp6errs_packet_too_big++;
return;
case ICMP6_TIME_EXCEEDED:
switch (code) {
case ICMP6_TIME_EXCEED_TRANSIT:
stat->icp6errs_time_exceed_transit++;
return;
case ICMP6_TIME_EXCEED_REASSEMBLY:
stat->icp6errs_time_exceed_reassembly++;
return;
}
break;
case ICMP6_PARAM_PROB:
switch (code) {
case ICMP6_PARAMPROB_HEADER:
stat->icp6errs_paramprob_header++;
return;
case ICMP6_PARAMPROB_NEXTHEADER:
stat->icp6errs_paramprob_nextheader++;
return;
case ICMP6_PARAMPROB_OPTION:
stat->icp6errs_paramprob_option++;
return;
}
break;
case ND_REDIRECT:
stat->icp6errs_redirect++;
return;
}
stat->icp6errs_unknown++;
}
void
icmp6_error(struct mbuf *m, int type, int code, int param)
{
struct ip6_hdr *oip6, *nip6;
struct icmp6_hdr *icmp6;
u_int preplen;
int off;
int nxt;
icmp6stat.icp6s_error++;
icmp6_errcount(&icmp6stat.icp6s_outerrhist, type, code);
#ifdef M_DECRYPTED
if (m->m_flags & M_DECRYPTED) {
icmp6stat.icp6s_canterror++;
goto freeit;
}
#endif
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), );
#else
if (m->m_len < sizeof(struct ip6_hdr)) {
m = m_pullup(m, sizeof(struct ip6_hdr));
if (m == NULL)
return;
}
#endif
oip6 = mtod(m, struct ip6_hdr *);
if ((oip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
kprintf("%s to %s not IPv6 (%d != %d)\n",
__func__, ip6_sprintf(&oip6->ip6_src),
oip6->ip6_vfc & IPV6_VERSION_MASK, IPV6_VERSION);
goto freeit;
}
if ((m->m_flags & (M_BCAST|M_MCAST) ||
IN6_IS_ADDR_MULTICAST(&oip6->ip6_dst)) &&
(type != ICMP6_PACKET_TOO_BIG &&
(type != ICMP6_PARAM_PROB ||
code != ICMP6_PARAMPROB_OPTION)))
goto freeit;
if (IN6_IS_ADDR_UNSPECIFIED(&oip6->ip6_src) ||
IN6_IS_ADDR_MULTICAST(&oip6->ip6_src))
goto freeit;
nxt = -1;
off = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nxt);
if (off >= 0 && nxt == IPPROTO_ICMPV6) {
struct icmp6_hdr *icp;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0, off + sizeof(struct icmp6_hdr), );
icp = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(icp, struct icmp6_hdr *, m, off,
sizeof(*icp));
if (icp == NULL) {
icmp6stat.icp6s_tooshort++;
return;
}
#endif
if (icp->icmp6_type < ICMP6_ECHO_REQUEST ||
icp->icmp6_type == ND_REDIRECT) {
icmp6stat.icp6s_canterror++;
goto freeit;
} else {
}
} else {
}
oip6 = mtod(m, struct ip6_hdr *);
if (icmp6_ratelimit(&oip6->ip6_src, type, code)) {
icmp6stat.icp6s_toofreq++;
goto freeit;
}
if (m->m_pkthdr.len >= ICMPV6_PLD_MAXLEN)
m_adj(m, ICMPV6_PLD_MAXLEN - m->m_pkthdr.len);
preplen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
M_PREPEND(m, preplen, M_NOWAIT);
if (m && m->m_len < preplen)
m = m_pullup(m, preplen);
if (m == NULL) {
nd6log((LOG_DEBUG, "ENOBUFS in icmp6_error %d\n", __LINE__));
return;
}
nip6 = mtod(m, struct ip6_hdr *);
nip6->ip6_src = oip6->ip6_src;
nip6->ip6_dst = oip6->ip6_dst;
in6_clearscope(&oip6->ip6_src);
in6_clearscope(&oip6->ip6_dst);
icmp6 = (struct icmp6_hdr *)(nip6 + 1);
icmp6->icmp6_type = type;
icmp6->icmp6_code = code;
icmp6->icmp6_pptr = htonl((u_int32_t)param);
m->m_pkthdr.rcvif = NULL;
icmp6stat.icp6s_outhist[type]++;
icmp6_reflect(m, sizeof(struct ip6_hdr));
return;
freeit:
m_freem(m);
}
int
icmp6_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m = *mp, *n;
struct ip6_hdr *ip6, *nip6;
struct icmp6_hdr *icmp6, *nicmp6;
int off = *offp;
int icmp6len = m->m_pkthdr.len - *offp;
int code, sum, noff;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_hdr), IPPROTO_DONE);
#endif
ip6 = mtod(m, struct ip6_hdr *);
if (icmp6len < sizeof(struct icmp6_hdr)) {
icmp6stat.icp6s_tooshort++;
goto freeit;
}
#ifndef PULLDOWN_TEST
icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
if (icmp6 == NULL) {
icmp6stat.icp6s_tooshort++;
return IPPROTO_DONE;
}
#endif
code = icmp6->icmp6_code;
if ((sum = in6_cksum(m, IPPROTO_ICMPV6, off, icmp6len)) != 0) {
nd6log((LOG_ERR,
"ICMP6 checksum error(%d|%x) %s\n",
icmp6->icmp6_type, sum, ip6_sprintf(&ip6->ip6_src)));
icmp6stat.icp6s_checksum++;
goto freeit;
}
icmp6stat.icp6s_inhist[icmp6->icmp6_type]++;
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_msg);
if (icmp6->icmp6_type < ICMP6_INFOMSG_MASK)
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_error);
switch (icmp6->icmp6_type) {
case ICMP6_DST_UNREACH:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_dstunreach);
switch (code) {
case ICMP6_DST_UNREACH_NOROUTE:
code = PRC_UNREACH_NET;
break;
case ICMP6_DST_UNREACH_ADMIN:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_adminprohib);
code = PRC_UNREACH_PROTOCOL;
break;
case ICMP6_DST_UNREACH_ADDR:
code = PRC_HOSTDEAD;
break;
#ifdef COMPAT_RFC1885
case ICMP6_DST_UNREACH_NOTNEIGHBOR:
code = PRC_UNREACH_SRCFAIL;
break;
#else
case ICMP6_DST_UNREACH_BEYONDSCOPE:
code = PRC_PARAMPROB;
break;
#endif
case ICMP6_DST_UNREACH_NOPORT:
code = PRC_UNREACH_PORT;
break;
default:
goto badcode;
}
goto deliver;
break;
case ICMP6_PACKET_TOO_BIG:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_pkttoobig);
if (code != 0)
goto badcode;
code = PRC_MSGSIZE;
goto deliver;
break;
case ICMP6_TIME_EXCEEDED:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_timeexceed);
switch (code) {
case ICMP6_TIME_EXCEED_TRANSIT:
case ICMP6_TIME_EXCEED_REASSEMBLY:
code += PRC_TIMXCEED_INTRANS;
break;
default:
goto badcode;
}
goto deliver;
break;
case ICMP6_PARAM_PROB:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_paramprob);
switch (code) {
case ICMP6_PARAMPROB_NEXTHEADER:
code = PRC_UNREACH_PROTOCOL;
break;
case ICMP6_PARAMPROB_HEADER:
case ICMP6_PARAMPROB_OPTION:
code = PRC_PARAMPROB;
break;
default:
goto badcode;
}
goto deliver;
break;
case ICMP6_ECHO_REQUEST:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echo);
if (code != 0)
goto badcode;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
break;
}
if ((n->m_flags & M_EXT) ||
n->m_len < off + sizeof(struct icmp6_hdr)) {
struct mbuf *n0 = n;
const int maxlen = sizeof(*nip6) + sizeof(*nicmp6);
int n0len;
if (maxlen >= MCLBYTES) {
m_freem(n0);
break;
}
n = m_getb(maxlen, M_NOWAIT, n0->m_type, M_PKTHDR);
if (n == NULL) {
m_freem(n0);
break;
}
n0len = n0->m_pkthdr.len;
M_MOVE_PKTHDR(n, n0);
nip6 = mtod(n, struct ip6_hdr *);
bcopy(ip6, nip6, sizeof(struct ip6_hdr));
nicmp6 = (struct icmp6_hdr *)(nip6 + 1);
bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr));
noff = sizeof(struct ip6_hdr);
n->m_len = noff + sizeof(struct icmp6_hdr);
m_adj(n0, off + sizeof(struct icmp6_hdr));
n->m_pkthdr.len = n0len + (noff - off);
n->m_next = n0;
} else {
nip6 = mtod(n, struct ip6_hdr *);
nicmp6 = (struct icmp6_hdr *)((caddr_t)nip6 + off);
noff = off;
}
nicmp6->icmp6_type = ICMP6_ECHO_REPLY;
nicmp6->icmp6_code = 0;
if (n) {
icmp6stat.icp6s_reflect++;
icmp6stat.icp6s_outhist[ICMP6_ECHO_REPLY]++;
icmp6_reflect(n, noff);
}
break;
case ICMP6_ECHO_REPLY:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echoreply);
if (code != 0)
goto badcode;
break;
case MLD_LISTENER_QUERY:
case MLD_LISTENER_REPORT:
if (icmp6len < sizeof(struct mld_hdr))
goto badlen;
if (icmp6->icmp6_type == MLD_LISTENER_QUERY)
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldquery);
else
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldreport);
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
mld6_input(m, off);
m = NULL;
goto freeit;
}
mld6_input(n, off);
break;
case MLD_LISTENER_DONE:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mlddone);
if (icmp6len < sizeof(struct mld_hdr))
goto badlen;
break;
case MLD_MTRACE_RESP:
case MLD_MTRACE:
break;
case ICMP6_WRUREQUEST:
{
enum { WRU, FQDN } mode;
if (!icmp6_nodeinfo)
break;
if (icmp6len == sizeof(struct icmp6_hdr) + 4)
mode = WRU;
else if (icmp6len >= sizeof(struct icmp6_nodeinfo))
mode = FQDN;
else
goto badlen;
#define hostnamelen strlen(hostname)
if (mode == FQDN) {
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_nodeinfo),
IPPROTO_DONE);
#endif
n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
if (n != NULL)
n = ni6_input(n, off);
noff = sizeof(struct ip6_hdr);
} else {
u_char *p;
int maxlen, maxhlen;
if ((icmp6_nodeinfo & 5) != 5)
break;
if (code != 0)
goto badcode;
maxlen = sizeof(*nip6) + sizeof(*nicmp6) + 4;
if (maxlen >= MCLBYTES) {
break;
}
n = m_getb(maxlen, M_NOWAIT, m->m_type, M_PKTHDR);
if (n == NULL) {
break;
}
if (!m_dup_pkthdr(n, m, M_NOWAIT)) {
m_free(n);
break;
}
n->m_len = 0;
maxhlen = M_TRAILINGSPACE(n) - maxlen;
if (maxhlen > hostnamelen)
maxhlen = hostnamelen;
nip6 = mtod(n, struct ip6_hdr *);
bcopy(ip6, nip6, sizeof(struct ip6_hdr));
nicmp6 = (struct icmp6_hdr *)(nip6 + 1);
bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr));
p = (u_char *)(nicmp6 + 1);
bzero(p, 4);
bcopy(hostname, p + 4, maxhlen);
noff = sizeof(struct ip6_hdr);
n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) +
sizeof(struct icmp6_hdr) + 4 + maxhlen;
nicmp6->icmp6_type = ICMP6_WRUREPLY;
nicmp6->icmp6_code = 0;
}
#undef hostnamelen
if (n) {
icmp6stat.icp6s_reflect++;
icmp6stat.icp6s_outhist[ICMP6_WRUREPLY]++;
icmp6_reflect(n, noff);
}
break;
}
case ICMP6_WRUREPLY:
if (code != 0)
goto badcode;
break;
case ND_ROUTER_SOLICIT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_routersolicit);
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_router_solicit))
goto badlen;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
nd6_rs_input(m, off, icmp6len);
m = NULL;
goto freeit;
}
nd6_rs_input(n, off, icmp6len);
break;
case ND_ROUTER_ADVERT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_routeradvert);
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_router_advert))
goto badlen;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
nd6_ra_input(m, off, icmp6len);
m = NULL;
goto freeit;
}
nd6_ra_input(n, off, icmp6len);
break;
case ND_NEIGHBOR_SOLICIT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighborsolicit);
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_neighbor_solicit))
goto badlen;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
nd6_ns_input(m, off, icmp6len);
m = NULL;
goto freeit;
}
nd6_ns_input(n, off, icmp6len);
break;
case ND_NEIGHBOR_ADVERT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighboradvert);
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_neighbor_advert))
goto badlen;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
nd6_na_input(m, off, icmp6len);
m = NULL;
goto freeit;
}
nd6_na_input(n, off, icmp6len);
break;
case ND_REDIRECT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_redirect);
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_redirect))
goto badlen;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) {
icmp6_redirect_input(m, off);
m = NULL;
goto freeit;
}
icmp6_redirect_input(n, off);
break;
case ICMP6_ROUTER_RENUMBERING:
if (code != ICMP6_ROUTER_RENUMBERING_COMMAND &&
code != ICMP6_ROUTER_RENUMBERING_RESULT)
goto badcode;
if (icmp6len < sizeof(struct icmp6_router_renum))
goto badlen;
break;
default:
nd6log((LOG_DEBUG,
"icmp6_input: unknown type %d(src=%s, dst=%s, ifid=%d)\n",
icmp6->icmp6_type, ip6_sprintf(&ip6->ip6_src),
ip6_sprintf(&ip6->ip6_dst),
m->m_pkthdr.rcvif ? m->m_pkthdr.rcvif->if_index : 0));
if (icmp6->icmp6_type < ICMP6_ECHO_REQUEST) {
code = PRC_NCMDS;
} else {
break;
}
deliver:
if (icmp6_notify_error(m, off, icmp6len, code)) {
return (IPPROTO_DONE);
}
break;
badcode:
icmp6stat.icp6s_badcode++;
break;
badlen:
icmp6stat.icp6s_badlen++;
break;
}
icmp6_rip6_input(&m, *offp);
return IPPROTO_DONE;
freeit:
m_freem(m);
return IPPROTO_DONE;
}
static int
icmp6_notify_error(struct mbuf *m, int off, int icmp6len, int code)
{
struct icmp6_hdr *icmp6;
struct ip6_hdr *eip6;
u_int32_t notifymtu;
struct sockaddr_in6 icmp6src, icmp6dst;
if (icmp6len < sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr)) {
icmp6stat.icp6s_tooshort++;
goto freeit;
}
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off,
sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr),
-1);
icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
sizeof(*icmp6) + sizeof(struct ip6_hdr));
if (icmp6 == NULL) {
icmp6stat.icp6s_tooshort++;
return (-1);
}
#endif
eip6 = (struct ip6_hdr *)(icmp6 + 1);
{
u_int8_t nxt = eip6->ip6_nxt;
int eoff = off + sizeof(struct icmp6_hdr) +
sizeof(struct ip6_hdr);
struct ip6ctlparam ip6cp;
struct in6_addr *finaldst = NULL;
int icmp6type = icmp6->icmp6_type;
struct ip6_frag *fh;
struct ip6_rthdr *rth;
int rthlen;
while (1) {
struct ip6_ext *eh;
switch (nxt) {
case IPPROTO_HOPOPTS:
case IPPROTO_DSTOPTS:
case IPPROTO_AH:
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0,
eoff + sizeof(struct ip6_ext), -1);
eh = (struct ip6_ext *)
(mtod(m, caddr_t) + eoff);
#else
IP6_EXTHDR_GET(eh, struct ip6_ext *, m,
eoff, sizeof(*eh));
if (eh == NULL) {
icmp6stat.icp6s_tooshort++;
return (-1);
}
#endif
if (nxt == IPPROTO_AH)
eoff += (eh->ip6e_len + 2) << 2;
else
eoff += (eh->ip6e_len + 1) << 3;
nxt = eh->ip6e_nxt;
break;
case IPPROTO_ROUTING:
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0, eoff + sizeof(*rth),
-1);
rth = (struct ip6_rthdr *)(mtod(m, caddr_t)
+ eoff);
#else
IP6_EXTHDR_GET(rth, struct ip6_rthdr *, m,
eoff, sizeof(*rth));
if (rth == NULL) {
icmp6stat.icp6s_tooshort++;
return (-1);
}
#endif
rthlen = (rth->ip6r_len + 1) << 3;
eoff += rthlen;
nxt = rth->ip6r_nxt;
break;
case IPPROTO_FRAGMENT:
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0, eoff +
sizeof(struct ip6_frag),
-1);
fh = (struct ip6_frag *)(mtod(m, caddr_t)
+ eoff);
#else
IP6_EXTHDR_GET(fh, struct ip6_frag *, m,
eoff, sizeof(*fh));
if (fh == NULL) {
icmp6stat.icp6s_tooshort++;
return (-1);
}
#endif
if (fh->ip6f_offlg & IP6F_OFF_MASK)
goto notify;
eoff += sizeof(struct ip6_frag);
nxt = fh->ip6f_nxt;
break;
default:
goto notify;
}
}
notify:
#ifndef PULLDOWN_TEST
icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
sizeof(*icmp6) + sizeof(struct ip6_hdr));
if (icmp6 == NULL) {
icmp6stat.icp6s_tooshort++;
return (-1);
}
#endif
eip6 = (struct ip6_hdr *)(icmp6 + 1);
bzero(&icmp6dst, sizeof(icmp6dst));
icmp6dst.sin6_len = sizeof(struct sockaddr_in6);
icmp6dst.sin6_family = AF_INET6;
if (finaldst == NULL)
icmp6dst.sin6_addr = eip6->ip6_dst;
else
icmp6dst.sin6_addr = *finaldst;
if (in6_addr2zoneid(m->m_pkthdr.rcvif, &icmp6dst.sin6_addr,
&icmp6dst.sin6_scope_id))
goto freeit;
if (in6_embedscope(&icmp6dst.sin6_addr, &icmp6dst,
NULL, NULL)) {
nd6log((LOG_DEBUG,
"icmp6_notify_error: in6_embedscope failed\n"));
goto freeit;
}
bzero(&icmp6src, sizeof(icmp6src));
icmp6src.sin6_len = sizeof(struct sockaddr_in6);
icmp6src.sin6_family = AF_INET6;
icmp6src.sin6_addr = eip6->ip6_src;
if (in6_addr2zoneid(m->m_pkthdr.rcvif, &icmp6src.sin6_addr,
&icmp6src.sin6_scope_id))
goto freeit;
if (in6_embedscope(&icmp6src.sin6_addr, &icmp6src,
NULL, NULL)) {
nd6log((LOG_DEBUG,
"icmp6_notify_error: in6_embedscope failed\n"));
goto freeit;
}
icmp6src.sin6_flowinfo =
(eip6->ip6_flow & IPV6_FLOWLABEL_MASK);
if (finaldst == NULL)
finaldst = &eip6->ip6_dst;
ip6cp.ip6c_m = m;
ip6cp.ip6c_icmp6 = icmp6;
ip6cp.ip6c_ip6 = (struct ip6_hdr *)(icmp6 + 1);
ip6cp.ip6c_off = eoff;
ip6cp.ip6c_finaldst = finaldst;
ip6cp.ip6c_src = &icmp6src;
ip6cp.ip6c_nxt = nxt;
if (icmp6type == ICMP6_PACKET_TOO_BIG) {
notifymtu = ntohl(icmp6->icmp6_mtu);
ip6cp.ip6c_cmdarg = (void *)¬ifymtu;
icmp6_mtudisc_update(&ip6cp, 1);
}
so_pr_ctlinput(
&inet6sw[ip6_protox[nxt]],
code, (struct sockaddr *)&icmp6dst, &ip6cp);
}
return (0);
freeit:
m_freem(m);
return (-1);
}
void
icmp6_mtudisc_update(struct ip6ctlparam *ip6cp, int validated)
{
struct in6_addr *dst = ip6cp->ip6c_finaldst;
struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6;
struct mbuf *m = ip6cp->ip6c_m;
u_int mtu = ntohl(icmp6->icmp6_mtu);
struct rtentry *rt = NULL;
struct sockaddr_in6 sin6;
if (!validated)
return;
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = PF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr = *dst;
if (IN6_IS_ADDR_LINKLOCAL(dst)) {
sin6.sin6_addr.s6_addr16[1] =
htons(m->m_pkthdr.rcvif->if_index);
}
rt = rtpurelookup((struct sockaddr *)&sin6);
if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
!(rt->rt_rmx.rmx_locks & RTV_MTU)) {
if (mtu < IPV6_MMTU) {
rt->rt_rmx.rmx_locks |= RTV_MTU;
} else if (mtu < rt->rt_ifp->if_mtu &&
rt->rt_rmx.rmx_mtu > mtu) {
icmp6stat.icp6s_pmtuchg++;
rt->rt_rmx.rmx_mtu = mtu;
}
}
if (rt)
--rt->rt_refcnt;
}
#define hostnamelen strlen(hostname)
static struct mbuf *
ni6_input(struct mbuf *m, int off)
{
struct icmp6_nodeinfo *ni6, *nni6;
struct mbuf *n = NULL;
u_int16_t qtype;
int subjlen;
int replylen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo);
struct ni_reply_fqdn *fqdn;
int addrs;
struct ifnet *ifp = NULL;
struct sockaddr_in6 sin6;
struct sockaddr_in6 sin6_d;
struct ip6_hdr *ip6;
int oldfqdn = 0;
char *subj = NULL;
struct in6_ifaddr *ia6 = NULL;
ip6 = mtod(m, struct ip6_hdr *);
#ifndef PULLDOWN_TEST
ni6 = (struct icmp6_nodeinfo *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(ni6, struct icmp6_nodeinfo *, m, off, sizeof(*ni6));
if (ni6 == NULL) {
return NULL;
}
#endif
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&ip6->ip6_dst, &sin6.sin6_addr, sizeof(sin6.sin6_addr));
if ((ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)&sin6)) != NULL) {
if ((ia6->ia6_flags & IN6_IFF_TEMPORARY) &&
(icmp6_nodeinfo & 4) == 0) {
nd6log((LOG_DEBUG, "ni6_input: ignore node info to "
"a temporary address in %s:%d",
__FILE__, __LINE__));
goto bad;
}
} else if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr))
;
else
goto bad;
qtype = ntohs(ni6->ni_qtype);
subjlen = m->m_pkthdr.len - off - sizeof(struct icmp6_nodeinfo);
switch (qtype) {
case NI_QTYPE_NOOP:
case NI_QTYPE_SUPTYPES:
if (ni6->ni_code == ICMP6_NI_SUBJ_FQDN && subjlen == 0)
break;
case NI_QTYPE_FQDN:
case NI_QTYPE_NODEADDR:
switch (ni6->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
#if ICMP6_NI_SUBJ_IPV6 != 0
case 0:
#endif
if (qtype == NI_QTYPE_FQDN && ni6->ni_code == 0 &&
subjlen == 0) {
oldfqdn++;
break;
}
#if ICMP6_NI_SUBJ_IPV6 != 0
if (ni6->ni_code != ICMP6_NI_SUBJ_IPV6)
goto bad;
#endif
if (subjlen != sizeof(sin6.sin6_addr))
goto bad;
m_copydata(m, off + sizeof(struct icmp6_nodeinfo),
subjlen, &sin6.sin6_addr);
if (in6_addr2zoneid(m->m_pkthdr.rcvif,
&sin6.sin6_addr, &sin6.sin6_scope_id))
goto bad;
in6_embedscope(&sin6.sin6_addr, &sin6, NULL, NULL);
bzero(&sin6_d, sizeof(sin6_d));
sin6_d.sin6_family = AF_INET6;
sin6_d.sin6_len = sizeof(sin6_d);
sin6_d.sin6_addr = ip6->ip6_dst;
if (in6_addr2zoneid(m->m_pkthdr.rcvif,
&ip6->ip6_dst, &sin6_d.sin6_scope_id))
goto bad;
in6_embedscope(&sin6_d.sin6_addr, &sin6_d, NULL, NULL);
subj = (char *)&sin6;
if (SA6_ARE_ADDR_EQUAL(&sin6, &sin6_d))
break;
goto bad;
case ICMP6_NI_SUBJ_FQDN:
n = ni6_nametodns(hostname, hostnamelen, 0);
if (!n || n->m_next || n->m_len == 0)
goto bad;
IP6_EXTHDR_GET(subj, char *, m,
off + sizeof(struct icmp6_nodeinfo), subjlen);
if (subj == NULL)
goto bad;
if (!ni6_dnsmatch(subj, subjlen, mtod(n, const char *),
n->m_len)) {
goto bad;
}
m_freem(n);
n = NULL;
break;
case ICMP6_NI_SUBJ_IPV4:
default:
goto bad;
}
break;
}
switch (qtype) {
case NI_QTYPE_FQDN:
if ((icmp6_nodeinfo & 1) == 0)
goto bad;
break;
case NI_QTYPE_NODEADDR:
if ((icmp6_nodeinfo & 2) == 0)
goto bad;
break;
}
switch (qtype) {
case NI_QTYPE_NOOP:
break;
case NI_QTYPE_SUPTYPES:
replylen += sizeof(u_int32_t);
break;
case NI_QTYPE_FQDN:
replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen);
break;
case NI_QTYPE_NODEADDR:
addrs = ni6_addrs(ni6, m, &ifp, subj);
if ((replylen += addrs * (sizeof(struct in6_addr) +
sizeof(u_int32_t))) > MCLBYTES)
replylen = MCLBYTES;
break;
default:
qtype = NI_QTYPE_FQDN;
replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen);
oldfqdn++;
break;
}
if (replylen > MCLBYTES) {
goto bad;
}
n = m_getb(replylen, M_NOWAIT, m->m_type, M_PKTHDR);
if (n == NULL) {
m_freem(m);
return (NULL);
}
M_MOVE_PKTHDR(n, m);
n->m_pkthdr.len = n->m_len = replylen;
bcopy(mtod(m, caddr_t), mtod(n, caddr_t), sizeof(struct ip6_hdr));
nni6 = (struct icmp6_nodeinfo *)(mtod(n, struct ip6_hdr *) + 1);
bcopy((caddr_t)ni6, (caddr_t)nni6, sizeof(struct icmp6_nodeinfo));
switch (qtype) {
case NI_QTYPE_NOOP:
nni6->ni_code = ICMP6_NI_SUCCESS;
nni6->ni_flags = 0;
break;
case NI_QTYPE_SUPTYPES:
{
u_int32_t v;
nni6->ni_code = ICMP6_NI_SUCCESS;
nni6->ni_flags = htons(0x0000);
v = (u_int32_t)htonl(0x0000000f);
bcopy(&v, nni6 + 1, sizeof(u_int32_t));
break;
}
case NI_QTYPE_FQDN:
nni6->ni_code = ICMP6_NI_SUCCESS;
fqdn = (struct ni_reply_fqdn *)(mtod(n, caddr_t) +
sizeof(struct ip6_hdr) +
sizeof(struct icmp6_nodeinfo));
nni6->ni_flags = 0;
fqdn->ni_fqdn_ttl = 0;
n->m_next = ni6_nametodns(hostname, hostnamelen, oldfqdn);
if (n->m_next == NULL)
goto bad;
if (n->m_next->m_next != NULL)
goto bad;
n->m_pkthdr.len += n->m_next->m_len;
break;
case NI_QTYPE_NODEADDR:
{
int lenlim, copied;
nni6->ni_code = ICMP6_NI_SUCCESS;
n->m_pkthdr.len = n->m_len =
sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo);
lenlim = M_TRAILINGSPACE(n);
copied = ni6_store_addrs(ni6, nni6, ifp, lenlim);
n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) +
sizeof(struct icmp6_nodeinfo) + copied;
break;
}
default:
break;
}
nni6->ni_type = ICMP6_NI_REPLY;
m_freem(m);
return (n);
bad:
m_freem(m);
if (n)
m_freem(n);
return (NULL);
}
#undef hostnamelen
static struct mbuf *
ni6_nametodns(const char *name, int namelen,
int old)
{
struct mbuf *m;
char *cp, *ep;
const char *p, *q;
int i, len, nterm;
if (old)
len = namelen + 1;
else
len = MCLBYTES;
m = m_getb(len, M_NOWAIT, MT_DATA, 0);
if (!m)
goto fail;
if (old) {
m->m_len = len;
*mtod(m, char *) = namelen;
bcopy(name, mtod(m, char *) + 1, namelen);
return m;
} else {
m->m_len = 0;
cp = mtod(m, char *);
ep = mtod(m, char *) + M_TRAILINGSPACE(m);
if (namelen == 0)
return m;
i = 0;
for (p = name; p < name + namelen; p++) {
if (*p && *p == '.')
i++;
}
if (i < 2)
nterm = 2;
else
nterm = 1;
p = name;
while (cp < ep && p < name + namelen) {
i = 0;
for (q = p; q < name + namelen && *q && *q != '.'; q++)
i++;
if (cp + i + 1 >= ep)
goto fail;
if (i <= 0 || i >= 64)
goto fail;
*cp++ = i;
bcopy(p, cp, i);
cp += i;
p = q;
if (p < name + namelen && *p == '.')
p++;
}
if (cp + nterm >= ep)
goto fail;
while (nterm-- > 0)
*cp++ = '\0';
m->m_len = cp - mtod(m, char *);
return m;
}
panic("should not reach here");
fail:
if (m)
m_freem(m);
return NULL;
}
static int
ni6_dnsmatch(const char *a, int alen, const char *b, int blen)
{
const char *a0, *b0;
int l;
if (alen == blen && bcmp(a, b, alen) == 0)
return 1;
a0 = a;
b0 = b;
if (alen < 2 || blen < 2)
return 0;
if (a0[alen - 1] != '\0' || b0[blen - 1] != '\0')
return 0;
alen--;
blen--;
while (a - a0 < alen && b - b0 < blen) {
if (a - a0 + 1 > alen || b - b0 + 1 > blen)
return 0;
if ((signed char)a[0] < 0 || (signed char)b[0] < 0)
return 0;
if (a[0] >= 64 || b[0] >= 64)
return 0;
if (a[0] == 0 && a - a0 == alen - 1)
return 1;
if (b[0] == 0 && b - b0 == blen - 1)
return 1;
if (a[0] == 0 || b[0] == 0)
return 0;
if (a[0] != b[0])
return 0;
l = a[0];
if (a - a0 + 1 + l > alen || b - b0 + 1 + l > blen)
return 0;
if (bcmp(a + 1, b + 1, l) != 0)
return 0;
a += 1 + l;
b += 1 + l;
}
if (a - a0 == alen && b - b0 == blen)
return 1;
else
return 0;
}
static int
ni6_addrs(struct icmp6_nodeinfo *ni6, struct mbuf *m, struct ifnet **ifpp,
char *subj)
{
const struct ifnet_array *arr;
struct in6_ifaddr *ifa6;
struct sockaddr_in6 *subj_ip6 = NULL;
int addrs = 0, addrsofif, iffound = 0;
int niflags = ni6->ni_flags;
int i;
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0) {
switch (ni6->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
if (subj == NULL)
return (0);
subj_ip6 = (struct sockaddr_in6 *)subj;
break;
default:
return (0);
}
}
arr = ifnet_array_get();
for (i = 0; i < arr->ifnet_count; ++i) {
struct ifnet *ifp = arr->ifnet_arr[i];
struct ifaddr_container *ifac;
addrsofif = 0;
TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link)
{
struct ifaddr *ifa = ifac->ifa;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifa6 = (struct in6_ifaddr *)ifa;
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0 &&
IN6_ARE_ADDR_EQUAL(&subj_ip6->sin6_addr,
&ifa6->ia_addr.sin6_addr))
iffound = 1;
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
case IPV6_ADDR_SCOPE_LINKLOCAL:
if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
continue;
break;
case IPV6_ADDR_SCOPE_SITELOCAL:
if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
continue;
break;
case IPV6_ADDR_SCOPE_GLOBAL:
if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
continue;
break;
default:
continue;
}
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) &&
!(niflags & NI_NODEADDR_FLAG_ANYCAST))
continue;
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) &&
(icmp6_nodeinfo & 4) == 0) {
continue;
}
addrsofif++;
}
if (iffound) {
*ifpp = ifp;
return (addrsofif);
}
addrs += addrsofif;
}
return (addrs);
}
static int
ni6_store_addrs(struct icmp6_nodeinfo *ni6, struct icmp6_nodeinfo *nni6,
struct ifnet *ifp0, int resid)
{
const struct ifnet_array *arr;
struct in6_ifaddr *ifa6;
int copied = 0, allow_deprecated = 0;
u_char *cp = (u_char *)(nni6 + 1);
int niflags = ni6->ni_flags;
u_int32_t ltime;
int idx, idx_dep = -1;
if (ifp0 == NULL && !(niflags & NI_NODEADDR_FLAG_ALL))
return (0);
arr = ifnet_array_get();
if (ifp0 == NULL) {
idx = 0;
} else {
for (idx = 0; idx < arr->ifnet_count; ++idx) {
if (arr->ifnet_arr[idx] == ifp0)
break;
}
}
again:
for (; idx < arr->ifnet_count; ++idx) {
struct ifnet *ifp = arr->ifnet_arr[idx];
struct ifaddr_container *ifac;
TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
struct ifaddr *ifa = ifac->ifa;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifa6 = (struct in6_ifaddr *)ifa;
if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) &&
allow_deprecated == 0) {
if (idx_dep < 0)
idx_dep = idx;
continue;
}
else if (!(ifa6->ia6_flags & IN6_IFF_DEPRECATED) &&
allow_deprecated != 0)
continue;
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
case IPV6_ADDR_SCOPE_LINKLOCAL:
if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
continue;
break;
case IPV6_ADDR_SCOPE_SITELOCAL:
if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
continue;
break;
case IPV6_ADDR_SCOPE_GLOBAL:
if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
continue;
break;
default:
continue;
}
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) &&
!(niflags & NI_NODEADDR_FLAG_ANYCAST))
continue;
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) &&
(icmp6_nodeinfo & 4) == 0) {
continue;
}
if (resid < sizeof(struct in6_addr) +
sizeof(u_int32_t)) {
nni6->ni_flags |=
NI_NODEADDR_FLAG_TRUNCATE;
return (copied);
}
if (ifa6->ia6_lifetime.ia6t_expire == 0)
ltime = ND6_INFINITE_LIFETIME;
else {
if (ifa6->ia6_lifetime.ia6t_expire >
time_uptime)
ltime = htonl(ifa6->ia6_lifetime.ia6t_expire - time_uptime);
else
ltime = 0;
}
bcopy(<ime, cp, sizeof(u_int32_t));
cp += sizeof(u_int32_t);
bcopy(&ifa6->ia_addr.sin6_addr, cp,
sizeof(struct in6_addr));
in6_clearscope((struct in6_addr *)cp);
cp += sizeof(struct in6_addr);
resid -= (sizeof(struct in6_addr) + sizeof(u_int32_t));
copied += (sizeof(struct in6_addr) +
sizeof(u_int32_t));
}
if (ifp0)
break;
}
if (allow_deprecated == 0 && idx_dep >= 0) {
idx = idx_dep;
allow_deprecated = 1;
goto again;
}
return (copied);
}
static int
icmp6_rip6_input(struct mbuf **mp, int off)
{
struct mbuf *m = *mp;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
struct in6pcb *in6p;
struct in6pcb *last = NULL;
struct sockaddr_in6 fromsa;
struct icmp6_hdr *icmp6;
struct mbuf *opts = NULL;
#ifndef PULLDOWN_TEST
icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
if (icmp6 == NULL) {
return IPPROTO_DONE;
}
#endif
bzero(&fromsa, sizeof(fromsa));
fromsa.sin6_len = sizeof(struct sockaddr_in6);
fromsa.sin6_family = AF_INET6;
in6_recoverscope(&fromsa, &ip6->ip6_src, m->m_pkthdr.rcvif);
LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list)
{
if (in6p->inp_flags & INP_PLACEMARKER)
continue;
if (!INP_ISIPV6(in6p))
continue;
if (in6p->in6p_ip6_nxt != IPPROTO_ICMPV6)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
continue;
if (in6p->in6p_icmp6filt
&& ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type,
in6p->in6p_icmp6filt))
continue;
if (last) {
struct socket *so;
struct mbuf *n;
if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
if (last->in6p_flags & IN6P_CONTROLOPTS)
ip6_savecontrol(last, &opts, ip6, n);
m_adj(n, off);
so = last->in6p_socket;
lwkt_gettoken(&so->so_rcv.ssb_token);
if (ssb_appendaddr(&so->so_rcv,
(struct sockaddr *)&fromsa, n, opts) == 0) {
m_freem(n);
if (opts)
m_freem(opts);
soroverflow(so);
} else {
sorwakeup(so);
}
lwkt_reltoken(&so->so_rcv.ssb_token);
opts = NULL;
}
}
last = in6p;
}
if (last) {
struct socket *so;
if (last->in6p_flags & IN6P_CONTROLOPTS)
ip6_savecontrol(last, &opts, ip6, m);
m_adj(m, off);
so = last->in6p_socket;
lwkt_gettoken(&so->so_rcv.ssb_token);
if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&fromsa,
m, opts) == 0) {
m_freem(m);
if (opts)
m_freem(opts);
soroverflow(so);
} else {
sorwakeup(so);
}
lwkt_reltoken(&so->so_rcv.ssb_token);
} else {
m_freem(m);
ip6stat.ip6s_delivered--;
}
return IPPROTO_DONE;
}
void
icmp6_reflect(struct mbuf *m, size_t off)
{
struct ip6_hdr *ip6;
struct icmp6_hdr *icmp6;
struct in6_ifaddr *ia;
struct in6_addr t, *src = NULL;
int plen;
int type, code;
struct ifnet *outif = NULL;
struct sockaddr_in6 sa6_src, sa6_dst;
#ifdef COMPAT_RFC1885
int mtu = IPV6_MMTU;
struct sockaddr_in6 *sin6 = &icmp6_reflect_rt.ro_dst;
#endif
if (off < sizeof(struct ip6_hdr)) {
nd6log((LOG_DEBUG,
"sanity fail: off=%lx, sizeof(ip6)=%lx in %s:%d\n",
(u_long)off, (u_long)sizeof(struct ip6_hdr),
__FILE__, __LINE__));
goto bad;
}
#ifdef DIAGNOSTIC
if (sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) > MHLEN)
panic("assumption failed in icmp6_reflect");
#endif
if (off > sizeof(struct ip6_hdr)) {
size_t l;
struct ip6_hdr nip6;
l = off - sizeof(struct ip6_hdr);
m_copydata(m, 0, sizeof(nip6), &nip6);
m_adj(m, l);
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
if (m->m_len < l) {
if ((m = m_pullup(m, l)) == NULL)
return;
}
bcopy((caddr_t)&nip6, mtod(m, caddr_t), sizeof(nip6));
} else {
size_t l;
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
if (m->m_len < l) {
if ((m = m_pullup(m, l)) == NULL)
return;
}
}
plen = m->m_pkthdr.len - sizeof(struct ip6_hdr);
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_nxt = IPPROTO_ICMPV6;
icmp6 = (struct icmp6_hdr *)(ip6 + 1);
type = icmp6->icmp6_type;
code = icmp6->icmp6_code;
t = ip6->ip6_dst;
ip6->ip6_dst = ip6->ip6_src;
bzero(&sa6_src, sizeof(sa6_src));
sa6_src.sin6_family = AF_INET6;
sa6_src.sin6_len = sizeof(sa6_src);
sa6_src.sin6_addr = ip6->ip6_dst;
in6_recoverscope(&sa6_src, &ip6->ip6_dst, m->m_pkthdr.rcvif);
in6_embedscope(&ip6->ip6_dst, &sa6_src, NULL, NULL);
bzero(&sa6_dst, sizeof(sa6_dst));
sa6_dst.sin6_family = AF_INET6;
sa6_dst.sin6_len = sizeof(sa6_dst);
sa6_dst.sin6_addr = t;
in6_recoverscope(&sa6_dst, &t, m->m_pkthdr.rcvif);
in6_embedscope(&t, &sa6_dst, NULL, NULL);
#ifdef COMPAT_RFC1885
if (icmp6_reflect_rt.ro_rt == 0 ||
! (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &ip6->ip6_dst))) {
if (icmp6_reflect_rt.ro_rt) {
RTFREE(icmp6_reflect_rt.ro_rt);
icmp6_reflect_rt.ro_rt = 0;
}
bzero(sin6, sizeof(*sin6));
sin6->sin6_family = PF_INET6;
sin6->sin6_len = sizeof(struct sockaddr_in6);
sin6->sin6_addr = ip6->ip6_dst;
rtalloc_ign((struct route *)&icmp6_reflect_rt.ro_rt,
RTF_PRCLONING);
}
if (icmp6_reflect_rt.ro_rt == 0)
goto bad;
if ((icmp6_reflect_rt.ro_rt->rt_flags & RTF_HOST)
&& mtu < icmp6_reflect_rt.ro_rt->rt_ifp->if_mtu)
mtu = icmp6_reflect_rt.ro_rt->rt_rmx.rmx_mtu;
if (mtu < m->m_pkthdr.len) {
plen -= (m->m_pkthdr.len - mtu);
m_adj(m, mtu - m->m_pkthdr.len);
}
#endif
for (ia = in6_ifaddr; ia; ia = ia->ia_next)
if (IN6_ARE_ADDR_EQUAL(&t, &ia->ia_addr.sin6_addr) &&
(ia->ia6_flags & (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY)) == 0) {
src = &t;
break;
}
if (ia == NULL && IN6_IS_ADDR_LINKLOCAL(&t) && (m->m_flags & M_LOOP)) {
src = &t;
}
if (src == NULL) {
int e;
struct route_in6 ro;
bzero(&ro, sizeof(ro));
src = in6_selectsrc(&sa6_src, NULL, NULL, &ro, NULL, &e, NULL);
if (ro.ro_rt)
RTFREE(ro.ro_rt);
if (src == NULL) {
nd6log((LOG_DEBUG,
"icmp6_reflect: source can't be determined: "
"dst=%s, error=%d\n",
ip6_sprintf(&sa6_src.sin6_addr), e));
goto bad;
}
}
ip6->ip6_src = *src;
ip6->ip6_flow = 0;
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
ip6->ip6_nxt = IPPROTO_ICMPV6;
if (m->m_pkthdr.rcvif) {
ip6->ip6_hlim = ND_IFINFO(m->m_pkthdr.rcvif)->chlim;
if (ip6->ip6_hlim < ip6_minhlim)
ip6->ip6_hlim = ip6_minhlim;
} else {
ip6->ip6_hlim = ip6_defhlim;
}
icmp6->icmp6_cksum = 0;
icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6,
sizeof(struct ip6_hdr), plen);
m->m_flags &= ~(M_BCAST|M_MCAST);
#ifdef COMPAT_RFC1885
ip6_output(m, NULL, &icmp6_reflect_rt, 0, NULL, &outif, NULL);
#else
ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL);
#endif
if (outif)
icmp6_ifoutstat_inc(outif, type, code);
return;
bad:
m_freem(m);
return;
}
static void
icmp6_fasttimo_dispatch(netmsg_t nmsg)
{
ASSERT_NETISR0;
crit_enter();
netisr_replymsg(&nmsg->base, 0);
crit_exit();
mld6_fasttimeo();
callout_reset(&icmp6_fasttimo_ch, ICMP6_FASTTIMO, icmp6_fasttimo, NULL);
}
static void
icmp6_fasttimo(void *dummy __unused)
{
struct netmsg_base *nmsg = &icmp6_fasttimo_nmsg;
KKASSERT(mycpuid == 0);
crit_enter();
if (nmsg->lmsg.ms_flags & MSGF_DONE)
netisr_sendmsg_oncpu(nmsg);
crit_exit();
}
static const char *
icmp6_redirect_diag(struct in6_addr *src6, struct in6_addr *dst6,
struct in6_addr *tgt6)
{
static char buf[1024];
ksnprintf(buf, sizeof(buf), "(src=%s dst=%s tgt=%s)",
ip6_sprintf(src6), ip6_sprintf(dst6), ip6_sprintf(tgt6));
return buf;
}
void
icmp6_redirect_input(struct mbuf *m, int off)
{
struct ifnet *ifp = m->m_pkthdr.rcvif;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
struct nd_redirect *nd_rd;
int icmp6len = ntohs(ip6->ip6_plen);
char *lladdr = NULL;
int lladdrlen = 0;
#if 0
u_char *redirhdr = NULL;
int redirhdrlen = 0;
#endif
struct rtentry *rt = NULL;
int is_router;
int is_onlink;
struct in6_addr src6 = ip6->ip6_src;
struct in6_addr redtgt6;
struct in6_addr reddst6;
union nd_opts ndopts;
if (!m || !ifp)
return;
if (ip6_forwarding)
goto freeit;
if (!icmp6_rediraccept)
goto freeit;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, icmp6len,);
nd_rd = (struct nd_redirect *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(nd_rd, struct nd_redirect *, m, off, icmp6len);
if (nd_rd == NULL) {
icmp6stat.icp6s_tooshort++;
return;
}
#endif
redtgt6 = nd_rd->nd_rd_target;
reddst6 = nd_rd->nd_rd_dst;
if (IN6_IS_ADDR_LINKLOCAL(&redtgt6))
redtgt6.s6_addr16[1] = htons(ifp->if_index);
if (IN6_IS_ADDR_LINKLOCAL(&reddst6))
reddst6.s6_addr16[1] = htons(ifp->if_index);
if (!IN6_IS_ADDR_LINKLOCAL(&src6)) {
nd6log((LOG_ERR,
"ICMP6 redirect sent from %s rejected; "
"must be from linklocal\n", ip6_sprintf(&src6)));
goto bad;
}
if (ip6->ip6_hlim != 255) {
nd6log((LOG_ERR,
"ICMP6 redirect sent from %s rejected; "
"hlim=%d (must be 255)\n",
ip6_sprintf(&src6), ip6->ip6_hlim));
goto bad;
}
{
struct sockaddr_in6 sin6;
struct in6_addr *gw6;
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&reddst6, &sin6.sin6_addr, sizeof reddst6);
rt = rtpurelookup((struct sockaddr *)&sin6);
if (rt != NULL) {
if (rt->rt_gateway == NULL ||
rt->rt_gateway->sa_family != AF_INET6) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; no route "
"with inet6 gateway found for redirect dst: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
--rt->rt_refcnt;
goto bad;
}
gw6 = &(((struct sockaddr_in6 *)rt->rt_gateway)->sin6_addr);
if (bcmp(&src6, gw6, sizeof(struct in6_addr)) != 0) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; "
"not equal to gw-for-src=%s (must be same): "
"%s\n",
ip6_sprintf(gw6),
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
--rt->rt_refcnt;
goto bad;
}
} else {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; "
"no route found for redirect dst: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto bad;
}
--rt->rt_refcnt;
rt = NULL;
}
if (IN6_IS_ADDR_MULTICAST(&reddst6)) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; "
"redirect dst must be unicast: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto bad;
}
is_router = is_onlink = 0;
if (IN6_IS_ADDR_LINKLOCAL(&redtgt6))
is_router = 1;
if (bcmp(&redtgt6, &reddst6, sizeof(redtgt6)) == 0)
is_onlink = 1;
if (!is_router && !is_onlink) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; "
"neither router case nor onlink case: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto bad;
}
icmp6len -= sizeof(*nd_rd);
nd6_option_init(nd_rd + 1, icmp6len, &ndopts);
if (nd6_options(&ndopts) < 0) {
nd6log((LOG_INFO, "icmp6_redirect_input: "
"invalid ND option, rejected: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto freeit;
}
if (ndopts.nd_opts_tgt_lladdr) {
lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1);
lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3;
}
#if 0
if (ndopts.nd_opts_rh) {
redirhdrlen = ndopts.nd_opts_rh->nd_opt_rh_len;
redirhdr = (u_char *)(ndopts.nd_opts_rh + 1);
}
#endif
if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
nd6log((LOG_INFO,
"icmp6_redirect_input: lladdrlen mismatch for %s "
"(if %d, icmp6 packet %d): %s\n",
ip6_sprintf(&redtgt6), ifp->if_addrlen, lladdrlen - 2,
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto bad;
}
nd6_cache_lladdr(ifp, &redtgt6, lladdr, lladdrlen, ND_REDIRECT,
is_onlink ? ND_REDIRECT_ONLINK : ND_REDIRECT_ROUTER);
if (!is_onlink) {
struct sockaddr_in6 sdst;
struct sockaddr_in6 sgw;
struct sockaddr_in6 ssrc;
bzero(&sdst, sizeof(sdst));
bzero(&sgw, sizeof(sgw));
bzero(&ssrc, sizeof(ssrc));
sdst.sin6_family = sgw.sin6_family = ssrc.sin6_family = AF_INET6;
sdst.sin6_len = sgw.sin6_len = ssrc.sin6_len =
sizeof(struct sockaddr_in6);
bcopy(&redtgt6, &sgw.sin6_addr, sizeof(struct in6_addr));
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
bcopy(&src6, &ssrc.sin6_addr, sizeof(struct in6_addr));
rtredirect((struct sockaddr *)&sdst, (struct sockaddr *)&sgw,
NULL, RTF_GATEWAY | RTF_HOST,
(struct sockaddr *)&ssrc);
}
{
struct sockaddr_in6 sdst;
bzero(&sdst, sizeof(sdst));
sdst.sin6_family = AF_INET6;
sdst.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
kpfctlinput(PRC_REDIRECT_HOST, (struct sockaddr *)&sdst);
}
freeit:
m_freem(m);
return;
bad:
icmp6stat.icp6s_badredirect++;
m_freem(m);
}
void
icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt)
{
struct ifnet *ifp;
struct in6_addr *ifp_ll6;
struct in6_addr *router_ll6;
struct ip6_hdr *sip6;
struct mbuf *m = NULL;
struct ip6_hdr *ip6;
struct nd_redirect *nd_rd;
size_t maxlen;
u_char *p;
struct ifnet *outif = NULL;
struct sockaddr_in6 src_sa;
icmp6_errcount(&icmp6stat.icp6s_outerrhist, ND_REDIRECT, 0);
if (!ip6_forwarding)
goto fail;
if (!m0 || !rt || !(rt->rt_flags & RTF_UP) || !(ifp = rt->rt_ifp))
goto fail;
sip6 = mtod(m0, struct ip6_hdr *);
bzero(&src_sa, sizeof(src_sa));
src_sa.sin6_family = AF_INET6;
src_sa.sin6_len = sizeof(src_sa);
src_sa.sin6_addr = sip6->ip6_src;
if (in6_addr2zoneid(ifp, &sip6->ip6_src, &src_sa.sin6_scope_id))
goto fail;
if (nd6_is_addr_neighbor(&src_sa, ifp) == 0)
goto fail;
if (IN6_IS_ADDR_MULTICAST(&sip6->ip6_dst))
goto fail;
if (icmp6_ratelimit(&sip6->ip6_src, ND_REDIRECT, 0))
goto fail;
#if IPV6_MMTU >= MCLBYTES
# error assumption failed about IPV6_MMTU and MCLBYTES
#endif
m = m_getb(IPV6_MMTU, M_NOWAIT, MT_HEADER, M_PKTHDR);
if (!m)
goto fail;
m->m_len = 0;
maxlen = M_TRAILINGSPACE(m);
maxlen = min(IPV6_MMTU, maxlen);
if (maxlen < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) +
((sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7)) {
goto fail;
}
{
struct in6_ifaddr *ia;
if ((ia = in6ifa_ifpforlinklocal(ifp,
IN6_IFF_NOTREADY|
IN6_IFF_ANYCAST)) == NULL)
goto fail;
ifp_ll6 = &ia->ia_addr.sin6_addr;
}
if (rt->rt_gateway && (rt->rt_flags & RTF_GATEWAY)) {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)rt->rt_gateway;
router_ll6 = &sin6->sin6_addr;
if (!IN6_IS_ADDR_LINKLOCAL(router_ll6))
router_ll6 = NULL;
} else
router_ll6 = NULL;
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_flow = 0;
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
ip6->ip6_nxt = IPPROTO_ICMPV6;
ip6->ip6_hlim = 255;
bcopy(ifp_ll6, &ip6->ip6_src, sizeof(struct in6_addr));
bcopy(&sip6->ip6_src, &ip6->ip6_dst, sizeof(struct in6_addr));
nd_rd = (struct nd_redirect *)(ip6 + 1);
nd_rd->nd_rd_type = ND_REDIRECT;
nd_rd->nd_rd_code = 0;
nd_rd->nd_rd_reserved = 0;
if (rt->rt_flags & RTF_GATEWAY) {
if (!router_ll6)
goto fail;
bcopy(router_ll6, &nd_rd->nd_rd_target,
sizeof(nd_rd->nd_rd_target));
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst,
sizeof(nd_rd->nd_rd_dst));
} else {
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_target,
sizeof(nd_rd->nd_rd_target));
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst,
sizeof(nd_rd->nd_rd_dst));
}
p = (u_char *)(nd_rd + 1);
if (!router_ll6)
goto nolladdropt;
{
struct rtentry *rt_router = NULL;
int len;
struct sockaddr_dl *sdl;
struct nd_opt_hdr *nd_opt;
char *lladdr;
rt_router = nd6_lookup(router_ll6, 0, ifp);
if (!rt_router)
goto nolladdropt;
len = sizeof(*nd_opt) + ifp->if_addrlen;
len = (len + 7) & ~7;
if (len + (p - (u_char *)ip6) > maxlen)
goto nolladdropt;
if (!(rt_router->rt_flags & RTF_GATEWAY) &&
(rt_router->rt_flags & RTF_LLINFO) &&
(rt_router->rt_gateway->sa_family == AF_LINK) &&
(sdl = (struct sockaddr_dl *)rt_router->rt_gateway) &&
sdl->sdl_alen) {
nd_opt = (struct nd_opt_hdr *)p;
nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
nd_opt->nd_opt_len = len >> 3;
lladdr = (char *)(nd_opt + 1);
bcopy(LLADDR(sdl), lladdr, ifp->if_addrlen);
p += len;
}
}
nolladdropt:;
m->m_pkthdr.len = m->m_len = p - (u_char *)ip6;
#ifdef M_DECRYPTED
if (m0->m_flags & M_DECRYPTED)
goto noredhdropt;
#endif
if (p - (u_char *)ip6 > maxlen)
goto noredhdropt;
{
int len;
struct nd_opt_rd_hdr *nd_opt_rh;
len = maxlen - (p - (u_char *)ip6);
len &= ~7;
if (m0->m_pkthdr.len != m0->m_len) {
if (m0->m_next) {
m_freem(m0->m_next);
m0->m_next = NULL;
}
m0->m_pkthdr.len = m0->m_len;
}
if (m0->m_next || m0->m_pkthdr.len != m0->m_len)
panic("assumption failed in %s:%d", __FILE__, __LINE__);
if (len - sizeof(*nd_opt_rh) < m0->m_pkthdr.len) {
m0->m_pkthdr.len = m0->m_len = len - sizeof(*nd_opt_rh);
} else {
size_t extra;
extra = m0->m_pkthdr.len % 8;
if (extra) {
if (8 - extra <= M_TRAILINGSPACE(m0)) {
m0->m_len += (8 - extra);
m0->m_pkthdr.len += (8 - extra);
} else {
m0->m_pkthdr.len -= extra;
m0->m_len -= extra;
}
}
len = m0->m_pkthdr.len + sizeof(*nd_opt_rh);
m0->m_pkthdr.len = m0->m_len = len - sizeof(*nd_opt_rh);
}
nd_opt_rh = (struct nd_opt_rd_hdr *)p;
bzero(nd_opt_rh, sizeof(*nd_opt_rh));
nd_opt_rh->nd_opt_rh_type = ND_OPT_REDIRECTED_HEADER;
nd_opt_rh->nd_opt_rh_len = len >> 3;
p += sizeof(*nd_opt_rh);
m->m_pkthdr.len = m->m_len = p - (u_char *)ip6;
m->m_next = m0;
m->m_pkthdr.len = m->m_len + m0->m_len;
m0 = NULL;
}
noredhdropt:;
if (m0 != NULL) {
m_freem(m0);
m0 = NULL;
}
in6_clearscope(&sip6->ip6_src);
in6_clearscope(&sip6->ip6_dst);
in6_clearscope(&nd_rd->nd_rd_target);
in6_clearscope(&nd_rd->nd_rd_dst);
ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr));
nd_rd->nd_rd_cksum = 0;
nd_rd->nd_rd_cksum
= in6_cksum(m, IPPROTO_ICMPV6, sizeof(*ip6), ntohs(ip6->ip6_plen));
ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL);
if (outif) {
icmp6_ifstat_inc(outif, ifs6_out_msg);
icmp6_ifstat_inc(outif, ifs6_out_redirect);
}
icmp6stat.icp6s_outhist[ND_REDIRECT]++;
return;
fail:
if (m)
m_freem(m);
if (m0)
m_freem(m0);
}
#ifdef HAVE_NRL_INPCB
#define in6pcb inpcb
#define in6p_icmp6filt inp_icmp6filt
#endif
void
icmp6_ctloutput(netmsg_t msg)
{
struct socket *so = msg->ctloutput.base.nm_so;
struct sockopt *sopt = msg->ctloutput.nm_sopt;
int error = 0;
int optlen;
struct inpcb *inp = so->so_pcb;
int level, op, optname;
if (sopt) {
level = sopt->sopt_level;
op = sopt->sopt_dir;
optname = sopt->sopt_name;
optlen = sopt->sopt_valsize;
} else
level = op = optname = optlen = 0;
if (level != IPPROTO_ICMPV6) {
error = EINVAL;
goto out;
}
switch (op) {
case PRCO_SETOPT:
switch (optname) {
case ICMP6_FILTER:
{
if (optlen != sizeof(struct icmp6_filter)) {
error = EMSGSIZE;
break;
}
if (inp->in6p_icmp6filt == NULL) {
error = EINVAL;
break;
}
error = soopt_to_kbuf(sopt, inp->in6p_icmp6filt, optlen,
optlen);
break;
}
default:
error = ENOPROTOOPT;
break;
}
break;
case PRCO_GETOPT:
switch (optname) {
case ICMP6_FILTER:
{
if (inp->in6p_icmp6filt == NULL) {
error = EINVAL;
break;
}
soopt_from_kbuf(sopt, inp->in6p_icmp6filt,
sizeof(struct icmp6_filter));
break;
}
default:
error = ENOPROTOOPT;
break;
}
break;
}
out:
lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
}
#ifdef HAVE_NRL_INPCB
#undef in6pcb
#undef in6p_icmp6filt
#endif
#ifndef HAVE_PPSRATECHECK
#ifndef timersub
#define timersub(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
if ((vvp)->tv_usec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_usec += 1000000; \
} \
} while (0)
#endif
static int
ppsratecheck(struct timeval *lasttime, int *curpps,
int maxpps)
{
struct timeval tv, delta;
int rv;
microtime(&tv);
timersub(&tv, lasttime, &delta);
if ((lasttime->tv_sec == 0 && lasttime->tv_usec == 0) ||
delta.tv_sec >= 1) {
*lasttime = tv;
*curpps = 0;
rv = 1;
} else if (maxpps < 0)
rv = 1;
else if (*curpps < maxpps)
rv = 1;
else
rv = 0;
#if 1
if (*curpps + 1 > *curpps)
*curpps = *curpps + 1;
#else
*curpps = *curpps + 1;
#endif
return (rv);
}
#endif
static int
icmp6_ratelimit(const struct in6_addr *dst,
const int type,
const int code)
{
int ret;
ret = 0;
if (!ppsratecheck(&icmp6errppslim_last, &icmp6errpps_count,
icmp6errppslim)) {
ret++;
}
return ret;
}
