tcp.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1990 Mentat Inc. */
#ifndef _INET_TCP_H
#define _INET_TCP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/inttypes.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <inet/tcp_sack.h>
#include <sys/socket.h>
#include <sys/multidata.h>
/*
* Private (and possibly temporary) ioctl used by configuration code
* to lock in the "default" stream for detached closes.
*/
#define TCP_IOC_DEFAULT_Q (('T' << 8) + 51)
/* TCP states */
#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_ACK_TIMER_NEEDED 0x8000 /* Start the delayed ACK timer */
#define TH_ORDREL_NEEDED 0x10000 /* Generate an ordrel indication */
#define TH_MARKNEXT_NEEDED 0x20000 /* Data should have MSGMARKNEXT */
#define TH_SEND_URP_MARK 0x40000 /* Send up tcp_urp_mark_mp */
/*
* 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;
struct conn_s;
/*
* Control structure for each open TCP stream,
* defined only within the kernel or for a kmem user.
* NOTE: tcp_reinit_values MUST have a line for each field in this structure!
*/
#if (defined(_KERNEL) || defined(_KMEMUSER))
typedef struct tcp_s {
/* Pointer to previous bind hash next. */
struct tcp_s *tcp_time_wait_next;
/* Pointer to next T/W block */
struct tcp_s *tcp_time_wait_prev;
/* Pointer to previous T/W next */
clock_t tcp_time_wait_expire;
struct conn_s *tcp_connp;
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 */
clock_t tcp_rto; /* Round trip timeout */
clock_t tcp_last_rcv_lbolt;
/* lbolt on last packet, used for PAWS */
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;
queue_t *tcp_rq; /* Our upstream neighbor (client) */
queue_t *tcp_wq; /* Our downstream neighbor */
/* 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 */
mblk_t *tcp_xmit_tail; /* Last rexmit data sent */
uint32_t tcp_unsent; /* # of bytes in hand that are unsent */
uint32_t tcp_xmit_tail_unsent; /* # of unsent bytes in xmit_tail */
uint32_t tcp_suna; /* Sender unacknowledged */
uint32_t tcp_rexmit_nxt; /* Next rexmit seq num */
uint32_t tcp_rexmit_max; /* Max retran seq num */
int32_t tcp_snd_burst; /* Send burst factor */
uint32_t tcp_cwnd; /* Congestion window */
int32_t tcp_cwnd_cnt; /* cwnd cnt in congestion avoidance */
uint32_t tcp_ibsegs; /* Inbound segments on this stream */
uint32_t tcp_obsegs; /* Outbound segments on this stream */
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. */
timeout_id_t tcp_timer_tid; /* Control block for timer service */
uchar_t tcp_timer_backoff; /* Backoff shift count. */
int64_t tcp_last_recv_time; /* Last time we receive a segment. */
uint32_t tcp_init_cwnd; /* Initial cwnd (start/restart) */
/*
* Following socket options are set by sockfs outside the squeue
* and we want to separate these bit fields from the other bit fields
* set by TCP to avoid grabbing locks. sockfs ensures that only one
* thread in sockfs can set a socket option at a time on a conn_t.
* However TCP may read these options concurrently. The linger option
* needs atomicity since tcp_lingertime also needs to be in sync.
* However TCP uses it only during close, and by then no socket option
* can come down. So we don't need any locks, instead just separating
* the sockfs settable bit fields from the other bit fields is
* sufficient.
*/
uint32_t
tcp_debug : 1, /* SO_DEBUG "socket" option. */
tcp_dontroute : 1, /* SO_DONTROUTE "socket" option. */
tcp_broadcast : 1, /* SO_BROADCAST "socket" option. */
tcp_useloopback : 1, /* SO_USELOOPBACK "socket" option. */
tcp_oobinline : 1, /* SO_OOBINLINE "socket" option. */
tcp_dgram_errind : 1, /* SO_DGRAM_ERRIND option */
tcp_linger : 1, /* SO_LINGER turned on */
tcp_reuseaddr : 1, /* SO_REUSEADDR "socket" option. */
tcp_junk_to_bit_31 : 24;
/* Following manipulated by TCP under squeue protection */
uint32_t
tcp_urp_last_valid : 1, /* Is tcp_urp_last valid? */
tcp_hard_binding : 1, /* If we've started a full bind */
tcp_hard_bound : 1, /* If we've done a full bind with IP */
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_ordrel_done : 1, /* Have we sent the ord_rel upstream? */
tcp_flow_stopped : 1, /* Have we flow controlled xmitter? */
tcp_detached : 1, /* If we're detached from a stream */
tcp_bind_pending : 1, /* Client is waiting for bind ack */
tcp_unbind_pending : 1, /* Client sent T_UNBIND_REQ */
tcp_deferred_clean_death : 1,
/* defer tcp endpoint cleanup etc. */
tcp_conn_def_q0: 1, /* move from q0 to q deferred */
tcp_ka_enabled: 1, /* Connection KeepAlive Timer needed */
tcp_zero_win_probe: 1, /* Zero win probing is in progress */
tcp_loopback: 1, /* src and dst are the same machine */
tcp_localnet: 1, /* src and dst are on the same subnet */
tcp_syn_defense: 1, /* For defense against SYN attack */
#define tcp_dontdrop tcp_syn_defense
tcp_set_timer : 1,
tcp_active_open: 1, /* This is a active open */
tcp_timeout : 1, /* qbufcall failed, qtimeout pending */
tcp_rexmit : 1, /* TCP is retransmitting */
tcp_snd_sack_ok : 1, /* Can use SACK for this connection */
tcp_empty_flag : 1, /* Empty flag for future use */
tcp_recvdstaddr : 1, /* return T_EXTCONN_IND with dst addr */
tcp_hwcksum : 1, /* The NIC is capable of hwcksum */
tcp_ip_forward_progress : 1,
tcp_anon_priv_bind : 1,
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 */
/* Following manipulated by TCP under squeue protection */
uint32_t
tcp_mdt : 1, /* Lower layer is capable of MDT */
tcp_snd_ts_ok : 1,
tcp_snd_ws_ok : 1,
tcp_exclbind : 1, /* ``exclusive'' binding */
tcp_reserved_port : 1,
tcp_hdr_grown : 1,
tcp_in_free_list : 1,
tcp_snd_zcopy_on : 1, /* xmit zero-copy enabled */
tcp_snd_zcopy_aware : 1, /* client is zero-copy aware */
tcp_xmit_zc_clean : 1, /* the xmit list is free of zc-mblk */
tcp_wait_for_eagers : 1, /* Wait for eagers to disappear */
tcp_accept_error : 1, /* Error during TLI accept */
tcp_send_discon_ind : 1, /* TLI accept err, send discon ind */
tcp_fused : 1, /* loopback tcp in fusion mode */
tcp_unfusable : 1, /* fusion not allowed on endpoint */
tcp_fused_sigurg : 1, /* send SIGURG upon draining */
tcp_cork : 1, /* tcp_cork option */
tcp_pad_to_bit_31 : 15;
uint32_t tcp_if_mtu; /* Outgoing interface MTU. */
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
mblk_t *tcp_rcv_list; /* Queued until push, urgent data, */
mblk_t *tcp_rcv_last_head; /* optdata, or the count exceeds */
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_cwnd_ssthresh; /* Congestion window */
uint32_t tcp_cwnd_max;
uint32_t tcp_csuna; /* Clear (no rexmits in window) suna */
clock_t tcp_rtt_sa; /* Round trip smoothed average */
clock_t tcp_rtt_sd; /* Round trip smoothed deviation */
clock_t tcp_rtt_update; /* Round trip update(s) */
clock_t tcp_ms_we_have_waited; /* Total retrans time */
uint32_t tcp_swl1; /* These help us avoid using stale */
uint32_t tcp_swl2; /* packets to update state */
uint32_t tcp_rack; /* Seq # we have acked */
uint32_t tcp_rack_cnt; /* # of segs we have deferred ack */
uint32_t tcp_rack_cur_max; /* # of segs we may defer ack for now */
uint32_t tcp_rack_abs_max; /* # of segs we may defer ack ever */
timeout_id_t tcp_ack_tid; /* Delayed ACK timer ID */
timeout_id_t tcp_push_tid; /* Push timer ID */
uint32_t tcp_max_swnd; /* Maximum swnd we have seen */
struct tcp_s *tcp_listener; /* Our listener */
int32_t tcp_xmit_lowater; /* Send buffer low water mark. */
uint32_t tcp_irs; /* Initial recv seq num */
uint32_t tcp_fss; /* Final/fin send seq num */
uint32_t tcp_urg; /* Urgent data seq num */
clock_t tcp_first_timer_threshold; /* When to prod IP */
clock_t tcp_second_timer_threshold; /* When to give up completely */
clock_t tcp_first_ctimer_threshold; /* 1st threshold while connecting */
clock_t tcp_second_ctimer_threshold; /* 2nd ... while connecting */
int tcp_lingertime; /* Close linger time (in seconds) */
uint32_t tcp_urp_last; /* Last urp for which signal sent */
mblk_t *tcp_urp_mp; /* T_EXDATA_IND for urgent byte */
mblk_t *tcp_urp_mark_mp; /* zero-length marked/unmarked msg */
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 */
t_scalar_t tcp_conn_req_seqnum; /* Incrementing pending conn req ID */
#define tcp_ip_addr_cache tcp_reass_tail
/* Cache ip addresses that */
/* complete the 3-way handshake */
kmutex_t tcp_eager_lock;
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 */
/* all eagers form a circular list */
union {
mblk_t *tcp_eager_conn_ind; /* T_CONN_IND waiting for 3rd ack. */
mblk_t *tcp_opts_conn_req; /* T_CONN_REQ w/ options processed */
} tcp_conn;
uint32_t tcp_syn_rcvd_timeout; /* How many SYN_RCVD timeout in q0 */
/* TCP Keepalive Timer members */
int32_t tcp_ka_last_intrvl; /* Last probe interval */
timeout_id_t tcp_ka_tid; /* Keepalive timer ID */
uint32_t tcp_ka_interval; /* Keepalive interval */
uint32_t tcp_ka_abort_thres; /* Keepalive abort threshold */
int32_t tcp_client_errno; /* How the client screwed up */
char *tcp_iphc; /* Buffer holding tcp/ip hdr template */
int tcp_iphc_len; /* actual allocated buffer size */
int32_t tcp_hdr_len; /* Byte len of combined TCP/IP hdr */
ipha_t *tcp_ipha; /* IPv4 header in the buffer */
ip6_t *tcp_ip6h; /* IPv6 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 */
uint32_t tcp_sum; /* checksum to compensate for source */
/* routed packets. Host byte order */
uint16_t tcp_last_sent_len; /* Record length for nagle */
uint16_t tcp_dupack_cnt; /* # of consequtive duplicate acks */
kmutex_t *tcp_acceptor_lockp; /* Ptr to tf_lock */
timeout_id_t tcp_ordrelid; /* qbufcall/qtimeout id */
t_uscalar_t tcp_acceptor_id; /* ACCEPTOR_id */
int tcp_ipsec_overhead;
/*
* 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;
/*
* used for a quick test to determine if any ancillary bits are
* set
*/
uint_t tcp_ipv6_recvancillary; /* Flags */
#define TCP_IPV6_RECVPKTINFO 0x01 /* IPV6_RECVPKTINFO option */
#define TCP_IPV6_RECVHOPLIMIT 0x02 /* IPV6_RECVHOPLIMIT option */
#define TCP_IPV6_RECVHOPOPTS 0x04 /* IPV6_RECVHOPOPTS option */
#define TCP_IPV6_RECVDSTOPTS 0x08 /* IPV6_RECVDSTOPTS option */
#define TCP_IPV6_RECVRTHDR 0x10 /* IPV6_RECVRTHDR option */
#define TCP_IPV6_RECVRTDSTOPTS 0x20 /* IPV6_RECVRTHDRDSTOPTS option */
#define TCP_IPV6_RECVTCLASS 0x40 /* IPV6_RECVTCLASS option */
#define TCP_OLD_IPV6_RECVDSTOPTS 0x80 /* old IPV6_RECVDSTOPTS option */
uint_t tcp_recvifindex; /* Last received IPV6_RCVPKTINFO */
uint_t tcp_recvhops; /* Last received IPV6_RECVHOPLIMIT */
uint_t tcp_recvtclass; /* Last received IPV6_RECVTCLASS */
ip6_hbh_t *tcp_hopopts; /* Last received IPV6_RECVHOPOPTS */
ip6_dest_t *tcp_dstopts; /* Last received IPV6_RECVDSTOPTS */
ip6_dest_t *tcp_rtdstopts; /* Last recvd IPV6_RECVRTHDRDSTOPTS */
ip6_rthdr_t *tcp_rthdr; /* Last received IPV6_RECVRTHDR */
uint_t tcp_hopoptslen;
uint_t tcp_dstoptslen;
uint_t tcp_rtdstoptslen;
uint_t tcp_rthdrlen;
mblk_t *tcp_timercache;
cred_t *tcp_cred; /* Credentials when this was opened */
pid_t tcp_cpid; /* Process id when this was opened */
union {
struct {
uchar_t v4_ttl;
/* Dup of tcp_ipha.iph_type_of_service */
uchar_t v4_tos; /* Dup of tcp_ipha.iph_ttl */
} v4_hdr_info;
struct {
uint_t v6_vcf; /* Dup of tcp_ip6h.ip6h_vcf */
uchar_t v6_hops; /* Dup of tcp_ip6h.ip6h_hops */
} v6_hdr_info;
} tcp_hdr_info;
#define tcp_ttl tcp_hdr_info.v4_hdr_info.v4_ttl
#define tcp_tos tcp_hdr_info.v4_hdr_info.v4_tos
#define tcp_ip6_vcf tcp_hdr_info.v6_hdr_info.v6_vcf
#define tcp_ip6_hops tcp_hdr_info.v6_hdr_info.v6_hops
ushort_t tcp_ipversion;
uint_t tcp_bound_if; /* IPV6_BOUND_IF */
#define tcp_lport tcp_connp->conn_lport
#define tcp_fport tcp_connp->conn_fport
#define tcp_ports tcp_connp->conn_ports
#define tcp_remote tcp_connp->conn_rem
#define tcp_ip_src tcp_connp->conn_src
#define tcp_remote_v6 tcp_connp->conn_remv6
#define tcp_ip_src_v6 tcp_connp->conn_srcv6
#define tcp_bound_source_v6 tcp_connp->conn_bound_source_v6
#define tcp_bound_source tcp_connp->conn_bound_source
kmutex_t tcp_closelock;
kcondvar_t tcp_closecv;
uint8_t tcp_closed;
uint8_t tcp_closeflags;
uint8_t tcp_cleandeathtag;
mblk_t tcp_closemp;
timeout_id_t tcp_linger_tid; /* Linger timer ID */
void *tcp_tracebuf;
struct tcp_s *tcp_acceptor_hash; /* Acceptor hash chain */
struct tcp_s **tcp_ptpahn; /* Pointer to previous accept hash next. */
struct tcp_s *tcp_bind_hash; /* Bind hash chain */
struct tcp_s **tcp_ptpbhn;
boolean_t tcp_ire_ill_check_done;
uint_t tcp_maxpsz;
/*
* used for Multidata Transmit
*/
uint_t tcp_mdt_hdr_head; /* leading header fragment extra space */
uint_t tcp_mdt_hdr_tail; /* trailing header fragment extra space */
int tcp_mdt_max_pld; /* maximum payload buffers per Multidata */
uint32_t tcp_ofo_fin_seq; /* Recv out of order FIN seq num */
uint32_t tcp_cwr_snd_max;
uint_t tcp_drop_opt_ack_cnt; /* # tcp generated optmgmt */
ip6_pkt_t tcp_sticky_ipp; /* Sticky options */
#define tcp_ipp_fields tcp_sticky_ipp.ipp_fields /* valid fields */
#define tcp_ipp_ifindex tcp_sticky_ipp.ipp_ifindex /* pktinfo ifindex */
#define tcp_ipp_addr tcp_sticky_ipp.ipp_addr /* pktinfo src/dst addr */
#define tcp_ipp_hoplimit tcp_sticky_ipp.ipp_hoplimit
#define tcp_ipp_hopoptslen tcp_sticky_ipp.ipp_hopoptslen
#define tcp_ipp_rtdstoptslen tcp_sticky_ipp.ipp_rtdstoptslen
#define tcp_ipp_rthdrlen tcp_sticky_ipp.ipp_rthdrlen
#define tcp_ipp_dstoptslen tcp_sticky_ipp.ipp_dstoptslen
#define tcp_ipp_hopopts tcp_sticky_ipp.ipp_hopopts
#define tcp_ipp_rtdstopts tcp_sticky_ipp.ipp_rtdstopts
#define tcp_ipp_rthdr tcp_sticky_ipp.ipp_rthdr
#define tcp_ipp_dstopts tcp_sticky_ipp.ipp_dstopts
#define tcp_ipp_nexthop tcp_sticky_ipp.ipp_nexthop
#define tcp_ipp_use_min_mtu tcp_sticky_ipp.ipp_use_min_mtu
struct tcp_s *tcp_saved_listener; /* saved value of listener */
struct tcp_s *tcp_loopback_peer; /* peer tcp for loopback */
mblk_t *tcp_fused_sigurg_mp; /* M_PCSIG mblk for SIGURG */
uint32_t tcp_in_ack_unsent; /* ACK for unsent data cnt. */
/*
* This variable is accessed without any lock protection
* and therefore must not be declared as a bit field along
* with the rest which require such condition.
*/
boolean_t tcp_issocket; /* this is a socket tcp */
} tcp_t;
extern void tcp_free(tcp_t *tcp);
extern void tcp_ddi_init(void);
extern void tcp_ddi_destroy(void);
extern void tcp_xmit_listeners_reset(mblk_t *mp, uint_t ip_hdr_len);
extern void tcp_conn_request(void *arg, mblk_t *mp, void *arg2);
extern void tcp_conn_request_unbound(void *arg, mblk_t *mp, void *arg2);
extern void tcp_input(void *arg, mblk_t *mp, void *arg2);
extern void tcp_rput_data(void *arg, mblk_t *mp, void *arg2);
extern void *tcp_get_conn(void *arg);
extern void tcp_time_wait_collector(void *arg);
/*
* The TCP Fanout structure.
* The hash tables and their linkage (tcp_*_hash_next, tcp_ptp*hn) are
* protected by the per-bucket tf_lock. Each tcp_t
* inserted in the list points back at this lock using tcp_*_lockp.
*
* The listener and acceptor hash queues are lists of tcp_t.
*/
/* listener hash and acceptor hash queue head */
typedef struct tf_s {
tcp_t *tf_tcp;
kmutex_t tf_lock;
} tf_t;
extern mib2_tcp_t tcp_mib;
#endif /* (defined(_KERNEL) || defined(_KMEMUSER)) */
/* Contract private interface between TCP and Clustering. */
#define CL_TCPI_V1 1 /* cl_tcpi_version number */
typedef struct cl_tcp_info_s {
ushort_t cl_tcpi_version; /* cl_tcp_info_t's version no */
ushort_t cl_tcpi_ipversion; /* IP version */
int32_t cl_tcpi_state; /* TCP state */
in_port_t cl_tcpi_lport; /* Local port */
in_port_t cl_tcpi_fport; /* Remote port */
in6_addr_t cl_tcpi_laddr_v6; /* Local IP address */
in6_addr_t cl_tcpi_faddr_v6; /* Remote IP address */
#ifdef _KERNEL
/* Note: V4_PART_OF_V6 is meant to be used only for _KERNEL defined stuff */
#define cl_tcpi_laddr V4_PART_OF_V6(cl_tcpi_laddr_v6)
#define cl_tcpi_faddr V4_PART_OF_V6(cl_tcpi_faddr_v6)
#endif /* _KERNEL */
} cl_tcp_info_t;
/*
* Hook functions to enable cluster networking
* On non-clustered systems these vectors must always be NULL.
*/
extern void (*cl_inet_listen)(uint8_t, sa_family_t, uint8_t *, in_port_t);
extern void (*cl_inet_unlisten)(uint8_t, sa_family_t, uint8_t *,
in_port_t);
/*
* Contracted Consolidation Private ioctl for aborting TCP connections.
* In order to keep the offsets and size of the structure the same between
* a 32-bit application and a 64-bit amd64 kernel, we use a #pragma
* pack(4).
*/
#define TCP_IOC_ABORT_CONN (('T' << 8) + 91)
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack(4)
#endif
typedef struct tcp_ioc_abort_conn_s {
struct sockaddr_storage ac_local; /* local addr and port */
struct sockaddr_storage ac_remote; /* remote addr and port */
int32_t ac_start; /* start state */
int32_t ac_end; /* end state */
int32_t ac_zoneid; /* zoneid */
} tcp_ioc_abort_conn_t;
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack()
#endif
/* Named Dispatch Parameter Management Structure */
typedef struct tcpparam_s {
uint32_t tcp_param_min;
uint32_t tcp_param_max;
uint32_t tcp_param_val;
char *tcp_param_name;
} tcpparam_t;
extern tcpparam_t tcp_param_arr[];
extern boolean_t do_tcp_fusion;
#if (defined(_KERNEL) || defined(_KMEMUSER))
extern void tcp_rput_other(tcp_t *tcp, mblk_t *mp);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _INET_TCP_H */