/* * Copyright 2004 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* * Copyright (c) 1982, 1986 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. */ #ifndef _TCP_INET_H #define _TCP_INET_H #pragma ident "%Z%%M% %I% %E% SMI" #ifdef __cplusplus extern "C" { #endif #include "tcp_sack.h" /* TCP states */ #define TCPS_ALL_ACKED -7 /* Internal state for retransmissions */ #define TCPS_CLOSED -6 #define TCPS_IDLE -5 /* idle (opened, but not bound) */ #define TCPS_BOUND -4 /* bound, ready to connect or accept */ #define TCPS_LISTEN -3 /* listening for connection */ #define TCPS_SYN_SENT -2 /* active, have sent syn */ #define TCPS_SYN_RCVD -1 /* have received syn (and sent ours) */ /* states < TCPS_ESTABLISHED are those where connections not established */ #define TCPS_ESTABLISHED 0 /* established */ #define TCPS_CLOSE_WAIT 1 /* rcvd fin, waiting for close */ /* states > TCPS_CLOSE_WAIT are those where user has closed */ #define TCPS_FIN_WAIT_1 2 /* have closed and sent fin */ #define TCPS_CLOSING 3 /* closed, xchd FIN, await FIN ACK */ #define TCPS_LAST_ACK 4 /* had fin and close; await FIN ACK */ /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ #define TCPS_FIN_WAIT_2 5 /* have closed, fin is acked */ #define TCPS_TIME_WAIT 6 /* in 2*msl quiet wait after close */ /* * Internal flags used in conjunction with the packet header flags. * Used in tcp_rput_data to keep track of what needs to be done. */ #define TH_LIMIT_XMIT 0x0400 /* Limited xmit is needed */ #define TH_XMIT_NEEDED 0x0800 /* Window opened - send queued data */ #define TH_REXMIT_NEEDED 0x1000 /* Time expired for unacked data */ #define TH_ACK_NEEDED 0x2000 /* Send an ack now. */ #define TH_NEED_SACK_REXMIT 0x4000 /* Use SACK info to retransmission */ #define TH_TIMER_NEEDED 0x8000 /* Start the delayed ack/push bit timer */ /* * Special Magic number used by TCP to issue a callback to recvfrom() in the * form of a dummy inetgram. */ #define TCP_CALLB_MAGIC_ID 0xFFFF /* * TCP sequence numbers are 32 bit integers operated * on with modular arithmetic. These macros can be * used to compare such integers. */ #define SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) #define SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) #define SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) #define SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) /* TCP Protocol header */ typedef struct tcphdr_s { uint8_t th_lport[2]; /* Source port */ uint8_t th_fport[2]; /* Destination port */ uint8_t th_seq[4]; /* Sequence number */ uint8_t th_ack[4]; /* Acknowledgement number */ uint8_t th_offset_and_rsrvd[1]; /* Offset to the packet data */ uint8_t th_flags[1]; uint8_t th_win[2]; /* Allocation number */ uint8_t th_sum[2]; /* TCP checksum */ uint8_t th_urp[2]; /* Urgent pointer */ } tcph_t; #define TCP_HDR_LENGTH(tcph) (((tcph)->th_offset_and_rsrvd[0] >>2) &(0xF << 2)) #define TCP_MAX_COMBINED_HEADER_LENGTH (60 + 60) /* Maxed out ip + tcp */ #define TCP_MAX_IP_OPTIONS_LENGTH (60 - IP_SIMPLE_HDR_LENGTH) #define TCP_MAX_HDR_LENGTH 60 #define TCP_MAX_TCP_OPTIONS_LENGTH (60 - sizeof (tcph_t)) #define TCP_MIN_HEADER_LENGTH 20 #define TCP_MAXWIN 65535 #define TCP_PORT_LEN sizeof (in_port_t) #define TCP_MAX_WINSHIFT 14 #define TCP_MAX_LARGEWIN (TCP_MAXWIN << TCP_MAX_WINSHIFT) #define TCPIP_HDR_LENGTH(mp, n) \ (n) = IPH_HDR_LENGTH((mp)->b_rptr), \ (n) += TCP_HDR_LENGTH((tcph_t *)&(mp)->b_rptr[(n)]) /* TCP Protocol header (used if the header is known to be 32-bit aligned) */ typedef struct tcphdra_s { in_port_t tha_lport; /* Source port */ in_port_t tha_fport; /* Destination port */ uint32_t tha_seq; /* Sequence number */ uint32_t tha_ack; /* Acknowledgement number */ uint8_t tha_offset_and_reserved; /* Offset to the packet data */ uint8_t tha_flags; uint16_t tha_win; /* Allocation number */ uint16_t tha_sum; /* TCP checksum */ uint16_t tha_urp; /* Urgent pointer */ } tcpha_t; typedef struct tcp_s { struct tcp_s *tcp_time_wait_next; /* Next TCP in TIME_WAIT list */ struct tcp_s *tcp_time_wait_prev; /* Prev TCP in TIME_WAIT list */ uint32_t tcp_max_swnd; /* Maximum swnd we have seen */ uint32_t tcp_suna; /* Sender unacknowledged */ uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */ uint32_t tcp_snxt; /* Senders next seq num */ uint32_t tcp_swnd; /* Senders window (relative to suna) */ uint32_t tcp_mss; /* Max segment size */ uint32_t tcp_iss; /* Initial send seq num */ uint32_t tcp_rnxt; /* Seq we expect to recv next */ uint32_t tcp_rwnd; /* Current receive window */ uint32_t tcp_rwnd_max; /* Max receive window */ uint32_t tcp_irs; /* Initial recv seq num */ uint32_t tcp_fss; /* Final/fin send seq num */ uint32_t tcp_swl1; /* These help us avoid using stale */ uint32_t tcp_swl2; /* packets to update state */ uint32_t tcp_cwnd; /* Congestion window */ int32_t tcp_cwnd_cnt; /* cwnd cnt in congestion avoidance */ uint32_t tcp_cwnd_ssthresh; /* Congestion window */ uint32_t tcp_cwnd_max; int32_t tcp_snd_burst; /* Send burst factor */ int32_t tcp_state; int32_t tcp_rcv_ws; /* My window scale power */ int32_t tcp_snd_ws; /* Sender's window scale power */ uint32_t tcp_ts_recent; /* Timestamp of earliest unacked */ /* data segment */ uint32_t tcp_if_mtu; /* Outgoing interface MTU. */ uint32_t tcp_rtt_sa; /* Round trip smoothed average */ uint32_t tcp_rtt_sd; /* Round trip smoothed deviation */ uint32_t tcp_rtt_update; /* Round trip update(s) */ uint32_t tcp_ms_we_have_waited; /* Total retrans time */ uint32_t tcp_rto; /* Round trip timeout */ uint32_t tcp_rto_timeout; /* RTT timeout time */ uint32_t tcp_time_wait_expire; /* time in hz when t/w expires */ uint32_t tcp_last_rcv_lbolt; /* lbolt on last packet, used for PAWS */ int tcp_lingertime; /* Close linger time (in seconds) */ uint32_t tcp_first_timer_threshold; /* When to prod IP */ uint32_t tcp_second_timer_threshold; /* When to give up completely */ uint32_t tcp_first_ctimer_threshold; /* 1st threshold when connecting */ uint32_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */ uint32_t tcp_rexmit_nxt; /* Next rexmit seq num */ uint32_t tcp_rexmit_max; /* Max retran seq num */ uint32_t tcp_naglim; /* Tunable nagle limit */ uint32_t tcp_valid_bits; #define TCP_ISS_VALID 0x1 /* Is the tcp_iss seq num active? */ #define TCP_FSS_VALID 0x2 /* Is the tcp_fss seq num active? */ #define TCP_URG_VALID 0x4 /* Is the tcp_urg seq num active? */ #define TCP_OFO_FIN_VALID 0x8 /* Has TCP received an out of order FIN? */ int32_t tcp_xmit_hiwater; /* Send buffer high water mark. */ int32_t tcp_xmit_lowater; /* Send buffer low water mark. */ uchar_t tcp_timer_backoff; /* Backoff shift count. */ uint32_t tcp_last_recv_time; /* Last time we receive a segment. */ /* Fields arranged in approximate access order along main paths */ mblk_t *tcp_xmit_head; /* Head of rexmit list */ mblk_t *tcp_xmit_last; /* last valid data seen by tcp_wput */ uint32_t tcp_unsent; /* # of bytes in hand that are unsent */ mblk_t *tcp_xmit_tail; /* Last rexmit data sent */ uint32_t tcp_xmit_tail_unsent; /* # of unsent bytes in xmit_tail */ mblk_t *tcp_rcv_list; /* Queued until push or exceed */ mblk_t *tcp_rcv_last_tail; /* tcp_rcv_push_wait. */ uint32_t tcp_rcv_cnt; /* tcp_rcv_list is b_next chain. */ uint32_t tcp_rack; /* Seq # we have acked */ uint32_t tcp_rack_cnt; /* # of bytes we have deferred ack */ mblk_t *tcp_reass_head; /* Out of order reassembly list head */ mblk_t *tcp_reass_tail; /* Out of order reassembly list tail */ tcp_sack_info_t *tcp_sack_info; #define tcp_pipe tcp_sack_info->tcp_pipe #define tcp_fack tcp_sack_info->tcp_fack #define tcp_sack_snxt tcp_sack_info->tcp_sack_snxt #define tcp_max_sack_blk tcp_sack_info->tcp_max_sack_blk #define tcp_num_sack_blk tcp_sack_info->tcp_num_sack_blk #define tcp_sack_list tcp_sack_info->tcp_sack_list #define tcp_num_notsack_blk tcp_sack_info->tcp_num_notsack_blk #define tcp_cnt_notsack_list tcp_sack_info->tcp_cnt_notsack_list #define tcp_notsack_list tcp_sack_info->tcp_notsack_list int tcp_conn_req_cnt_q0; /* # of conn reqs in SYN_RCVD */ int tcp_conn_req_cnt_q; /* # of conn reqs in ESTABLISHED */ int tcp_conn_req_max; /* # of ESTABLISHED conn reqs allowed */ int tcp_iphc_len; /* actual allocated buffer size */ int32_t tcp_hdr_len; /* Byte len of combined TCP/IP hdr */ struct ip *tcp_ipha; /* IPv4 header in the buffer */ int tcp_ip_hdr_len; /* Byte len of our current IPvx hdr */ tcph_t *tcp_tcph; /* tcp header within combined hdr */ int32_t tcp_tcp_hdr_len; /* tcp header len within combined */ uint16_t tcp_last_sent_len; /* Record length for nagle */ uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */ /* * Address family that app wishes returned addrsses to be in. * Currently taken from address family used in T_BIND_REQ, but * should really come from family used in original socket() call. * Value can be AF_INET or AF_INET6. */ uint_t tcp_family; uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */ uint32_t tcp_cwr_snd_max; uint32_t tcp_fin_acked : 1, /* Has our FIN been acked? */ tcp_fin_rcvd : 1, /* Have we seen a FIN? */ tcp_fin_sent : 1, /* Have we sent our FIN yet? */ tcp_useloopback : 1, /* SO_USELOOPBACK "socket" option. */ tcp_conn_def_q0: 1, /* move from q0 to q deferred */ tcp_zero_win_probe: 1, /* Zero win probing is in progress */ tcp_set_timer : 1, tcp_active_open: 1, /* This is a active open */ tcp_timer_running: 1, /* Retransmission timer running */ tcp_rexmit : 1, /* TCP is retransmitting */ tcp_snd_sack_ok : 1, /* Can use SACK for this connection */ tcp_ecn_ok : 1, /* Can use ECN for this connection */ tcp_ecn_echo_on : 1, /* Need to do ECN echo */ tcp_ecn_cwr_sent : 1, /* ECN_CWR has been sent */ tcp_cwr : 1, /* Cwnd has reduced recently */ tcp_snd_ts_ok : 1, tcp_snd_ws_ok : 1, tcp_linger : 1, tcp_dontdrop : 1, tcp_junk_fill_thru_bit_31 : 13; char *tcp_iphc; /* Buffer holding tcp/ip hdr template */ in_addr_t tcp_remote; /* true remote address - needed for */ /* source routing. */ in_addr_t tcp_bound_source; /* IP address in bind_req */ /* * These fields contain the same information as tcp_tcph->th_*port. * However, the lookup functions can not use the header fields * since during IP option manipulation the tcp_tcph pointer * changes. */ union { struct { in_port_t tcpu_fport; /* Remote port */ in_port_t tcpu_lport; /* Local port */ } tcpu_ports1; uint32_t tcpu_ports2; /* Rem port, */ /* local port */ /* Used for TCP_MATCH performance */ } tcp_tcpu; #define tcp_fport tcp_tcpu.tcpu_ports1.tcpu_fport #define tcp_lport tcp_tcpu.tcpu_ports1.tcpu_lport #define tcp_ports tcp_tcpu.tcpu_ports2 /* * IP format that packets transmitted from this struct should use. * Value can be IPV4_VERSION or IPV6_VERSION. Determines whether * IP+TCP header template above stores an IPv4 or IPv6 header. */ ushort_t tcp_ipversion; int tcp_client_errno; struct tcp_s *tcp_eager_next_q; /* next eager in ESTABLISHED state */ struct tcp_s *tcp_eager_last_q; /* last eager in ESTABLISHED state */ struct tcp_s *tcp_eager_next_q0; /* next eager in SYN_RCVD state */ struct tcp_s *tcp_eager_prev_q0; /* prev eager in SYN_RCVD state */ struct tcp_s *tcp_listener; /* Our listener */ } tcp_t; /* External TCP functions. */ extern void tcp_socket_init(struct inetboot_socket *); extern int tcp_connect(int); extern int tcp_listen(int, int); extern int tcp_bind(int); extern int tcp_send(int, tcp_t *, const void *, int); extern int tcp_opt_set(tcp_t *, int, int, const void *, socklen_t); extern int tcp_accept(int, struct sockaddr *, socklen_t *); extern int tcp_shutdown(int); /* Exported for recvfrom */ extern void tcp_rcv_drain_sock(int); /* Exported for stand/lib/sock/sock_test.c */ extern void tcp_time_wait_report(void); #ifdef __cplusplus } #endif #endif /* _TCP_INET_H */
