10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*1676Sjpk * Common Development and Distribution License (the "License"). 6*1676Sjpk * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate /* 22*1676Sjpk * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 230Sstevel@tonic-gate * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 260Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 270Sstevel@tonic-gate 280Sstevel@tonic-gate #include <sys/types.h> 290Sstevel@tonic-gate #include <sys/systm.h> 300Sstevel@tonic-gate #include <sys/stream.h> 310Sstevel@tonic-gate #include <sys/cmn_err.h> 320Sstevel@tonic-gate #include <sys/kmem.h> 330Sstevel@tonic-gate #define _SUN_TPI_VERSION 2 340Sstevel@tonic-gate #include <sys/tihdr.h> 350Sstevel@tonic-gate #include <sys/socket.h> 360Sstevel@tonic-gate #include <sys/strsun.h> 370Sstevel@tonic-gate #include <sys/strsubr.h> 380Sstevel@tonic-gate 390Sstevel@tonic-gate #include <netinet/in.h> 400Sstevel@tonic-gate #include <netinet/ip6.h> 410Sstevel@tonic-gate #include <netinet/tcp_seq.h> 420Sstevel@tonic-gate #include <netinet/sctp.h> 430Sstevel@tonic-gate 440Sstevel@tonic-gate #include <inet/common.h> 450Sstevel@tonic-gate #include <inet/ip.h> 460Sstevel@tonic-gate #include <inet/ip6.h> 470Sstevel@tonic-gate #include <inet/mib2.h> 480Sstevel@tonic-gate #include <inet/ipclassifier.h> 490Sstevel@tonic-gate #include <inet/ipp_common.h> 500Sstevel@tonic-gate #include <inet/ipsec_impl.h> 510Sstevel@tonic-gate #include <inet/sctp_ip.h> 520Sstevel@tonic-gate 530Sstevel@tonic-gate #include "sctp_impl.h" 540Sstevel@tonic-gate #include "sctp_asconf.h" 550Sstevel@tonic-gate #include "sctp_addr.h" 560Sstevel@tonic-gate 570Sstevel@tonic-gate static struct kmem_cache *sctp_kmem_set_cache; 580Sstevel@tonic-gate 590Sstevel@tonic-gate /* 600Sstevel@tonic-gate * PR-SCTP comments. 610Sstevel@tonic-gate * 620Sstevel@tonic-gate * When we get a valid Forward TSN chunk, we check the fragment list for this 630Sstevel@tonic-gate * SSN and preceeding SSNs free all them. Further, if this Forward TSN causes 640Sstevel@tonic-gate * the next expected SSN to be present in the stream queue, we deliver any 650Sstevel@tonic-gate * such stranded messages upstream. We also update the SACK info. appropriately. 660Sstevel@tonic-gate * When checking for advancing the cumulative ack (in sctp_cumack()) we must 670Sstevel@tonic-gate * check for abandoned chunks and messages. While traversing the tramsmit 680Sstevel@tonic-gate * list if we come across an abandoned chunk, we can skip the message (i.e. 690Sstevel@tonic-gate * take it out of the (re)transmit list) since this message, and hence this 700Sstevel@tonic-gate * chunk, has been marked abandoned by sctp_rexmit(). If we come across an 710Sstevel@tonic-gate * unsent chunk for a message this now abandoned we need to check if a 720Sstevel@tonic-gate * Forward TSN needs to be sent, this could be a case where we deferred sending 730Sstevel@tonic-gate * a Forward TSN in sctp_get_msg_to_send(). Further, after processing a 740Sstevel@tonic-gate * SACK we check if the Advanced peer ack point can be moved ahead, i.e. 750Sstevel@tonic-gate * if we can send a Forward TSN via sctp_check_abandoned_data(). 760Sstevel@tonic-gate */ 770Sstevel@tonic-gate void 780Sstevel@tonic-gate sctp_free_set(sctp_set_t *s) 790Sstevel@tonic-gate { 800Sstevel@tonic-gate sctp_set_t *p; 810Sstevel@tonic-gate 820Sstevel@tonic-gate while (s) { 830Sstevel@tonic-gate p = s->next; 840Sstevel@tonic-gate kmem_cache_free(sctp_kmem_set_cache, s); 850Sstevel@tonic-gate s = p; 860Sstevel@tonic-gate } 870Sstevel@tonic-gate } 880Sstevel@tonic-gate 890Sstevel@tonic-gate static void 900Sstevel@tonic-gate sctp_ack_add(sctp_set_t **head, uint32_t tsn, int *num) 910Sstevel@tonic-gate { 920Sstevel@tonic-gate sctp_set_t *p, *t; 930Sstevel@tonic-gate 940Sstevel@tonic-gate if (head == NULL || num == NULL) 950Sstevel@tonic-gate return; 960Sstevel@tonic-gate 970Sstevel@tonic-gate ASSERT(*num >= 0); 980Sstevel@tonic-gate ASSERT((*num == 0 && *head == NULL) || (*num > 0 && *head != NULL)); 990Sstevel@tonic-gate 1000Sstevel@tonic-gate if (*head == NULL) { 1010Sstevel@tonic-gate *head = kmem_cache_alloc(sctp_kmem_set_cache, KM_NOSLEEP); 1020Sstevel@tonic-gate if (*head == NULL) 1030Sstevel@tonic-gate return; 1040Sstevel@tonic-gate (*head)->prev = (*head)->next = NULL; 1050Sstevel@tonic-gate (*head)->begin = tsn; 1060Sstevel@tonic-gate (*head)->end = tsn; 1070Sstevel@tonic-gate *num = 1; 1080Sstevel@tonic-gate return; 1090Sstevel@tonic-gate } 1100Sstevel@tonic-gate 1110Sstevel@tonic-gate ASSERT((*head)->prev == NULL); 1120Sstevel@tonic-gate 1130Sstevel@tonic-gate /* 1140Sstevel@tonic-gate * Handle this special case here so we don't have to check 1150Sstevel@tonic-gate * for it each time in the loop. 1160Sstevel@tonic-gate */ 1170Sstevel@tonic-gate if (SEQ_LT(tsn + 1, (*head)->begin)) { 1180Sstevel@tonic-gate /* add a new set, and move the head pointer */ 1190Sstevel@tonic-gate t = kmem_cache_alloc(sctp_kmem_set_cache, KM_NOSLEEP); 1200Sstevel@tonic-gate if (t == NULL) 1210Sstevel@tonic-gate return; 1220Sstevel@tonic-gate t->next = *head; 1230Sstevel@tonic-gate t->prev = NULL; 1240Sstevel@tonic-gate (*head)->prev = t; 1250Sstevel@tonic-gate t->begin = tsn; 1260Sstevel@tonic-gate t->end = tsn; 1270Sstevel@tonic-gate (*num)++; 1280Sstevel@tonic-gate *head = t; 1290Sstevel@tonic-gate return; 1300Sstevel@tonic-gate } 1310Sstevel@tonic-gate 1320Sstevel@tonic-gate /* 1330Sstevel@tonic-gate * We need to handle the following cases, where p points to 1340Sstevel@tonic-gate * the current set (as we walk through the loop): 1350Sstevel@tonic-gate * 1360Sstevel@tonic-gate * 1. tsn is entirely less than p; create a new set before p. 1370Sstevel@tonic-gate * 2. tsn borders p from less; coalesce p with tsn. 1380Sstevel@tonic-gate * 3. tsn is withing p; do nothing. 1390Sstevel@tonic-gate * 4. tsn borders p from greater; coalesce p with tsn. 1400Sstevel@tonic-gate * 4a. p may now border p->next from less; if so, coalesce those 1410Sstevel@tonic-gate * two sets. 1420Sstevel@tonic-gate * 5. tsn is entirely greater then all sets; add a new set at 1430Sstevel@tonic-gate * the end. 1440Sstevel@tonic-gate */ 1450Sstevel@tonic-gate for (p = *head; ; p = p->next) { 1460Sstevel@tonic-gate if (SEQ_LT(tsn + 1, p->begin)) { 1470Sstevel@tonic-gate /* 1: add a new set before p. */ 1480Sstevel@tonic-gate t = kmem_cache_alloc(sctp_kmem_set_cache, KM_NOSLEEP); 1490Sstevel@tonic-gate if (t == NULL) 1500Sstevel@tonic-gate return; 1510Sstevel@tonic-gate t->next = p; 1520Sstevel@tonic-gate t->prev = NULL; 1530Sstevel@tonic-gate t->begin = tsn; 1540Sstevel@tonic-gate t->end = tsn; 1550Sstevel@tonic-gate if (p->prev) { 1560Sstevel@tonic-gate t->prev = p->prev; 1570Sstevel@tonic-gate p->prev->next = t; 1580Sstevel@tonic-gate } 1590Sstevel@tonic-gate p->prev = t; 1600Sstevel@tonic-gate (*num)++; 1610Sstevel@tonic-gate return; 1620Sstevel@tonic-gate } 1630Sstevel@tonic-gate 1640Sstevel@tonic-gate if ((tsn + 1) == p->begin) { 1650Sstevel@tonic-gate /* 2: adjust p->begin */ 1660Sstevel@tonic-gate p->begin = tsn; 1670Sstevel@tonic-gate return; 1680Sstevel@tonic-gate } 1690Sstevel@tonic-gate 1700Sstevel@tonic-gate if (SEQ_GEQ(tsn, p->begin) && SEQ_LEQ(tsn, p->end)) { 1710Sstevel@tonic-gate /* 3; do nothing */ 1720Sstevel@tonic-gate return; 1730Sstevel@tonic-gate } 1740Sstevel@tonic-gate 1750Sstevel@tonic-gate if ((p->end + 1) == tsn) { 1760Sstevel@tonic-gate /* 4; adjust p->end */ 1770Sstevel@tonic-gate p->end = tsn; 1780Sstevel@tonic-gate 1790Sstevel@tonic-gate if (p->next != NULL && (tsn + 1) == p->next->begin) { 1800Sstevel@tonic-gate /* 4a: coalesce p and p->next */ 1810Sstevel@tonic-gate t = p->next; 1820Sstevel@tonic-gate p->end = t->end; 1830Sstevel@tonic-gate p->next = t->next; 1840Sstevel@tonic-gate if (t->next != NULL) 1850Sstevel@tonic-gate t->next->prev = p; 1860Sstevel@tonic-gate kmem_cache_free(sctp_kmem_set_cache, t); 1870Sstevel@tonic-gate (*num)--; 1880Sstevel@tonic-gate } 1890Sstevel@tonic-gate return; 1900Sstevel@tonic-gate } 1910Sstevel@tonic-gate 1920Sstevel@tonic-gate if (p->next == NULL) { 1930Sstevel@tonic-gate /* 5: add new set at the end */ 1940Sstevel@tonic-gate t = kmem_cache_alloc(sctp_kmem_set_cache, KM_NOSLEEP); 1950Sstevel@tonic-gate if (t == NULL) 1960Sstevel@tonic-gate return; 1970Sstevel@tonic-gate t->next = NULL; 1980Sstevel@tonic-gate t->prev = p; 1990Sstevel@tonic-gate t->begin = tsn; 2000Sstevel@tonic-gate t->end = tsn; 2010Sstevel@tonic-gate p->next = t; 2020Sstevel@tonic-gate (*num)++; 2030Sstevel@tonic-gate return; 2040Sstevel@tonic-gate } 2050Sstevel@tonic-gate 2060Sstevel@tonic-gate if (SEQ_GT(tsn, p->end + 1)) 2070Sstevel@tonic-gate continue; 2080Sstevel@tonic-gate } 2090Sstevel@tonic-gate } 2100Sstevel@tonic-gate 2110Sstevel@tonic-gate static void 2120Sstevel@tonic-gate sctp_ack_rem(sctp_set_t **head, uint32_t end, int *num) 2130Sstevel@tonic-gate { 2140Sstevel@tonic-gate sctp_set_t *p, *t; 2150Sstevel@tonic-gate 2160Sstevel@tonic-gate if (head == NULL || *head == NULL || num == NULL) 2170Sstevel@tonic-gate return; 2180Sstevel@tonic-gate 2190Sstevel@tonic-gate /* Nothing to remove */ 2200Sstevel@tonic-gate if (SEQ_LT(end, (*head)->begin)) 2210Sstevel@tonic-gate return; 2220Sstevel@tonic-gate 2230Sstevel@tonic-gate /* Find out where to start removing sets */ 2240Sstevel@tonic-gate for (p = *head; p->next; p = p->next) { 2250Sstevel@tonic-gate if (SEQ_LEQ(end, p->end)) 2260Sstevel@tonic-gate break; 2270Sstevel@tonic-gate } 2280Sstevel@tonic-gate 2290Sstevel@tonic-gate if (SEQ_LT(end, p->end) && SEQ_GEQ(end, p->begin)) { 2300Sstevel@tonic-gate /* adjust p */ 2310Sstevel@tonic-gate p->begin = end + 1; 2320Sstevel@tonic-gate /* all done */ 2330Sstevel@tonic-gate if (p == *head) 2340Sstevel@tonic-gate return; 2350Sstevel@tonic-gate } else if (SEQ_GEQ(end, p->end)) { 2360Sstevel@tonic-gate /* remove this set too */ 2370Sstevel@tonic-gate p = p->next; 2380Sstevel@tonic-gate } 2390Sstevel@tonic-gate 2400Sstevel@tonic-gate /* unlink everything before this set */ 2410Sstevel@tonic-gate t = *head; 2420Sstevel@tonic-gate *head = p; 2430Sstevel@tonic-gate if (p != NULL && p->prev != NULL) { 2440Sstevel@tonic-gate p->prev->next = NULL; 2450Sstevel@tonic-gate p->prev = NULL; 2460Sstevel@tonic-gate } 2470Sstevel@tonic-gate 2480Sstevel@tonic-gate sctp_free_set(t); 2490Sstevel@tonic-gate 2500Sstevel@tonic-gate /* recount the number of sets */ 2510Sstevel@tonic-gate *num = 0; 2520Sstevel@tonic-gate 2530Sstevel@tonic-gate for (p = *head; p != NULL; p = p->next) 2540Sstevel@tonic-gate (*num)++; 2550Sstevel@tonic-gate } 2560Sstevel@tonic-gate 2570Sstevel@tonic-gate void 2580Sstevel@tonic-gate sctp_sets_init() 2590Sstevel@tonic-gate { 2600Sstevel@tonic-gate sctp_kmem_set_cache = kmem_cache_create("sctp_set_cache", 2610Sstevel@tonic-gate sizeof (sctp_set_t), 0, NULL, NULL, NULL, NULL, 2620Sstevel@tonic-gate NULL, 0); 2630Sstevel@tonic-gate } 2640Sstevel@tonic-gate 2650Sstevel@tonic-gate void 2660Sstevel@tonic-gate sctp_sets_fini() 2670Sstevel@tonic-gate { 2680Sstevel@tonic-gate kmem_cache_destroy(sctp_kmem_set_cache); 2690Sstevel@tonic-gate } 2700Sstevel@tonic-gate 2710Sstevel@tonic-gate sctp_chunk_hdr_t * 2720Sstevel@tonic-gate sctp_first_chunk(uchar_t *rptr, ssize_t remaining) 2730Sstevel@tonic-gate { 2740Sstevel@tonic-gate sctp_chunk_hdr_t *ch; 2750Sstevel@tonic-gate uint16_t ch_len; 2760Sstevel@tonic-gate 2770Sstevel@tonic-gate if (remaining < sizeof (*ch)) { 2780Sstevel@tonic-gate return (NULL); 2790Sstevel@tonic-gate } 2800Sstevel@tonic-gate 2810Sstevel@tonic-gate ch = (sctp_chunk_hdr_t *)rptr; 2820Sstevel@tonic-gate ch_len = ntohs(ch->sch_len); 2830Sstevel@tonic-gate 2840Sstevel@tonic-gate if (ch_len < sizeof (*ch) || remaining < ch_len) { 2850Sstevel@tonic-gate return (NULL); 2860Sstevel@tonic-gate } 2870Sstevel@tonic-gate 2880Sstevel@tonic-gate return (ch); 2890Sstevel@tonic-gate } 2900Sstevel@tonic-gate 2910Sstevel@tonic-gate sctp_chunk_hdr_t * 2920Sstevel@tonic-gate sctp_next_chunk(sctp_chunk_hdr_t *ch, ssize_t *remaining) 2930Sstevel@tonic-gate { 2940Sstevel@tonic-gate int pad; 2950Sstevel@tonic-gate uint16_t ch_len; 2960Sstevel@tonic-gate 2970Sstevel@tonic-gate if (!ch) { 2980Sstevel@tonic-gate return (NULL); 2990Sstevel@tonic-gate } 3000Sstevel@tonic-gate 3010Sstevel@tonic-gate ch_len = ntohs(ch->sch_len); 3020Sstevel@tonic-gate 3030Sstevel@tonic-gate if ((pad = ch_len & (SCTP_ALIGN - 1)) != 0) { 3040Sstevel@tonic-gate pad = SCTP_ALIGN - pad; 3050Sstevel@tonic-gate } 3060Sstevel@tonic-gate 3070Sstevel@tonic-gate *remaining -= (ch_len + pad); 3080Sstevel@tonic-gate ch = (sctp_chunk_hdr_t *)((char *)ch + ch_len + pad); 3090Sstevel@tonic-gate 3100Sstevel@tonic-gate return (sctp_first_chunk((uchar_t *)ch, *remaining)); 3110Sstevel@tonic-gate } 3120Sstevel@tonic-gate 3130Sstevel@tonic-gate /* 3140Sstevel@tonic-gate * Attach ancillary data to a received SCTP segments. 3150Sstevel@tonic-gate * If the source address (fp) is not the primary, send up a 3160Sstevel@tonic-gate * unitdata_ind so recvfrom() can populate the msg_name field. 3170Sstevel@tonic-gate * If ancillary data is also requested, we append it to the 3180Sstevel@tonic-gate * unitdata_req. Otherwise, we just send up an optdata_ind. 3190Sstevel@tonic-gate */ 3200Sstevel@tonic-gate static int 3210Sstevel@tonic-gate sctp_input_add_ancillary(sctp_t *sctp, mblk_t **mp, sctp_data_hdr_t *dcp, 3220Sstevel@tonic-gate sctp_faddr_t *fp, ip6_pkt_t *ipp) 3230Sstevel@tonic-gate { 3240Sstevel@tonic-gate struct T_unitdata_ind *tudi; 3250Sstevel@tonic-gate int optlen; 3260Sstevel@tonic-gate int hdrlen; 3270Sstevel@tonic-gate uchar_t *optptr; 3280Sstevel@tonic-gate struct cmsghdr *cmsg; 3290Sstevel@tonic-gate mblk_t *mp1; 3300Sstevel@tonic-gate struct sockaddr_in6 sin_buf[1]; 3310Sstevel@tonic-gate struct sockaddr_in6 *sin6; 3320Sstevel@tonic-gate struct sockaddr_in *sin4; 3330Sstevel@tonic-gate uint_t addflag = 0; 3340Sstevel@tonic-gate 3350Sstevel@tonic-gate sin4 = NULL; 3360Sstevel@tonic-gate sin6 = NULL; 3370Sstevel@tonic-gate 3380Sstevel@tonic-gate optlen = hdrlen = 0; 3390Sstevel@tonic-gate 3400Sstevel@tonic-gate /* Figure out address size */ 3410Sstevel@tonic-gate if (sctp->sctp_ipversion == IPV4_VERSION) { 3420Sstevel@tonic-gate sin4 = (struct sockaddr_in *)sin_buf; 3430Sstevel@tonic-gate sin4->sin_family = AF_INET; 3440Sstevel@tonic-gate sin4->sin_port = sctp->sctp_fport; 3450Sstevel@tonic-gate IN6_V4MAPPED_TO_IPADDR(&fp->faddr, sin4->sin_addr.s_addr); 3460Sstevel@tonic-gate hdrlen = sizeof (*tudi) + sizeof (*sin4); 3470Sstevel@tonic-gate } else { 3480Sstevel@tonic-gate sin6 = sin_buf; 3490Sstevel@tonic-gate sin6->sin6_family = AF_INET6; 3500Sstevel@tonic-gate sin6->sin6_port = sctp->sctp_fport; 3510Sstevel@tonic-gate sin6->sin6_addr = fp->faddr; 3520Sstevel@tonic-gate hdrlen = sizeof (*tudi) + sizeof (*sin6); 3530Sstevel@tonic-gate } 3540Sstevel@tonic-gate 3550Sstevel@tonic-gate /* If app asked to receive send / recv info */ 3560Sstevel@tonic-gate if (sctp->sctp_recvsndrcvinfo) { 3570Sstevel@tonic-gate optlen += sizeof (*cmsg) + sizeof (struct sctp_sndrcvinfo); 3580Sstevel@tonic-gate if (hdrlen == 0) 3590Sstevel@tonic-gate hdrlen = sizeof (struct T_optdata_ind); 3600Sstevel@tonic-gate } 3610Sstevel@tonic-gate 3620Sstevel@tonic-gate if (sctp->sctp_ipv6_recvancillary == 0) 3630Sstevel@tonic-gate goto noancillary; 3640Sstevel@tonic-gate 3650Sstevel@tonic-gate if ((ipp->ipp_fields & IPPF_IFINDEX) && 3660Sstevel@tonic-gate ipp->ipp_ifindex != sctp->sctp_recvifindex && 3670Sstevel@tonic-gate (sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVPKTINFO)) { 3680Sstevel@tonic-gate optlen += sizeof (*cmsg) + sizeof (struct in6_pktinfo); 3690Sstevel@tonic-gate if (hdrlen == 0) 3700Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 3710Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVPKTINFO; 3720Sstevel@tonic-gate } 3730Sstevel@tonic-gate /* If app asked for hoplimit and it has changed ... */ 3740Sstevel@tonic-gate if ((ipp->ipp_fields & IPPF_HOPLIMIT) && 3750Sstevel@tonic-gate ipp->ipp_hoplimit != sctp->sctp_recvhops && 3760Sstevel@tonic-gate (sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVHOPLIMIT)) { 3770Sstevel@tonic-gate optlen += sizeof (*cmsg) + sizeof (uint_t); 3780Sstevel@tonic-gate if (hdrlen == 0) 3790Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 3800Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVHOPLIMIT; 3810Sstevel@tonic-gate } 3820Sstevel@tonic-gate /* If app asked for hopbyhop headers and it has changed ... */ 3830Sstevel@tonic-gate if ((sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVHOPOPTS) && 384*1676Sjpk ip_cmpbuf(sctp->sctp_hopopts, sctp->sctp_hopoptslen, 3850Sstevel@tonic-gate (ipp->ipp_fields & IPPF_HOPOPTS), 3860Sstevel@tonic-gate ipp->ipp_hopopts, ipp->ipp_hopoptslen)) { 387*1676Sjpk optlen += sizeof (*cmsg) + ipp->ipp_hopoptslen - 388*1676Sjpk sctp->sctp_v6label_len; 3890Sstevel@tonic-gate if (hdrlen == 0) 3900Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 3910Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVHOPOPTS; 392*1676Sjpk if (!ip_allocbuf((void **)&sctp->sctp_hopopts, 3930Sstevel@tonic-gate &sctp->sctp_hopoptslen, 3940Sstevel@tonic-gate (ipp->ipp_fields & IPPF_HOPOPTS), 3950Sstevel@tonic-gate ipp->ipp_hopopts, ipp->ipp_hopoptslen)) 3960Sstevel@tonic-gate return (-1); 3970Sstevel@tonic-gate } 3980Sstevel@tonic-gate /* If app asked for dst headers before routing headers ... */ 3990Sstevel@tonic-gate if ((sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVRTDSTOPTS) && 400*1676Sjpk ip_cmpbuf(sctp->sctp_rtdstopts, sctp->sctp_rtdstoptslen, 4010Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTDSTOPTS), 4020Sstevel@tonic-gate ipp->ipp_rtdstopts, ipp->ipp_rtdstoptslen)) { 4030Sstevel@tonic-gate optlen += sizeof (*cmsg) + ipp->ipp_rtdstoptslen; 4040Sstevel@tonic-gate if (hdrlen == 0) 4050Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 4060Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVRTDSTOPTS; 407*1676Sjpk if (!ip_allocbuf((void **)&sctp->sctp_rtdstopts, 4080Sstevel@tonic-gate &sctp->sctp_rtdstoptslen, 4090Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTDSTOPTS), 4100Sstevel@tonic-gate ipp->ipp_rtdstopts, ipp->ipp_rtdstoptslen)) 4110Sstevel@tonic-gate return (-1); 4120Sstevel@tonic-gate } 4130Sstevel@tonic-gate /* If app asked for routing headers and it has changed ... */ 4140Sstevel@tonic-gate if (sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVRTHDR) { 415*1676Sjpk if (ip_cmpbuf(sctp->sctp_rthdr, sctp->sctp_rthdrlen, 4160Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTHDR), 4170Sstevel@tonic-gate ipp->ipp_rthdr, ipp->ipp_rthdrlen)) { 4180Sstevel@tonic-gate optlen += sizeof (*cmsg) + ipp->ipp_rthdrlen; 4190Sstevel@tonic-gate if (hdrlen == 0) 4200Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 4210Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVRTHDR; 422*1676Sjpk if (!ip_allocbuf((void **)&sctp->sctp_rthdr, 4230Sstevel@tonic-gate &sctp->sctp_rthdrlen, 4240Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTHDR), 4250Sstevel@tonic-gate ipp->ipp_rthdr, ipp->ipp_rthdrlen)) 4260Sstevel@tonic-gate return (-1); 4270Sstevel@tonic-gate } 4280Sstevel@tonic-gate } 4290Sstevel@tonic-gate /* If app asked for dest headers and it has changed ... */ 4300Sstevel@tonic-gate if ((sctp->sctp_ipv6_recvancillary & SCTP_IPV6_RECVDSTOPTS) && 431*1676Sjpk ip_cmpbuf(sctp->sctp_dstopts, sctp->sctp_dstoptslen, 4320Sstevel@tonic-gate (ipp->ipp_fields & IPPF_DSTOPTS), 4330Sstevel@tonic-gate ipp->ipp_dstopts, ipp->ipp_dstoptslen)) { 4340Sstevel@tonic-gate optlen += sizeof (*cmsg) + ipp->ipp_dstoptslen; 4350Sstevel@tonic-gate if (hdrlen == 0) 4360Sstevel@tonic-gate hdrlen = sizeof (struct T_unitdata_ind); 4370Sstevel@tonic-gate addflag |= SCTP_IPV6_RECVDSTOPTS; 438*1676Sjpk if (!ip_allocbuf((void **)&sctp->sctp_dstopts, 4390Sstevel@tonic-gate &sctp->sctp_dstoptslen, 4400Sstevel@tonic-gate (ipp->ipp_fields & IPPF_DSTOPTS), 4410Sstevel@tonic-gate ipp->ipp_dstopts, ipp->ipp_dstoptslen)) 4420Sstevel@tonic-gate return (-1); 4430Sstevel@tonic-gate } 4440Sstevel@tonic-gate noancillary: 4450Sstevel@tonic-gate /* Nothing to add */ 4460Sstevel@tonic-gate if (hdrlen == 0) 4470Sstevel@tonic-gate return (-1); 4480Sstevel@tonic-gate 4490Sstevel@tonic-gate mp1 = allocb(hdrlen + optlen + sizeof (void *), BPRI_MED); 4500Sstevel@tonic-gate if (mp1 == NULL) 4510Sstevel@tonic-gate return (-1); 4520Sstevel@tonic-gate mp1->b_cont = *mp; 4530Sstevel@tonic-gate *mp = mp1; 4540Sstevel@tonic-gate mp1->b_rptr += sizeof (void *); /* pointer worth of padding */ 4550Sstevel@tonic-gate mp1->b_wptr = mp1->b_rptr + hdrlen + optlen; 4560Sstevel@tonic-gate DB_TYPE(mp1) = M_PROTO; 4570Sstevel@tonic-gate tudi = (struct T_unitdata_ind *)mp1->b_rptr; 4580Sstevel@tonic-gate tudi->PRIM_type = T_UNITDATA_IND; 4590Sstevel@tonic-gate tudi->SRC_length = sin4 ? sizeof (*sin4) : sizeof (*sin6); 4600Sstevel@tonic-gate tudi->SRC_offset = sizeof (*tudi); 4610Sstevel@tonic-gate tudi->OPT_offset = sizeof (*tudi) + tudi->SRC_length; 4620Sstevel@tonic-gate tudi->OPT_length = optlen; 4630Sstevel@tonic-gate if (sin4) { 4640Sstevel@tonic-gate bcopy(sin4, tudi + 1, sizeof (*sin4)); 4650Sstevel@tonic-gate } else { 4660Sstevel@tonic-gate bcopy(sin6, tudi + 1, sizeof (*sin6)); 4670Sstevel@tonic-gate } 4680Sstevel@tonic-gate optptr = (uchar_t *)tudi + tudi->OPT_offset; 4690Sstevel@tonic-gate 4700Sstevel@tonic-gate if (sctp->sctp_recvsndrcvinfo) { 4710Sstevel@tonic-gate /* XXX need backout method if memory allocation fails. */ 4720Sstevel@tonic-gate struct sctp_sndrcvinfo *sri; 4730Sstevel@tonic-gate 4740Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 4750Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_SCTP; 4760Sstevel@tonic-gate cmsg->cmsg_type = SCTP_SNDRCV; 4770Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + sizeof (*sri); 4780Sstevel@tonic-gate optptr += sizeof (*cmsg); 4790Sstevel@tonic-gate 4800Sstevel@tonic-gate sri = (struct sctp_sndrcvinfo *)(cmsg + 1); 4810Sstevel@tonic-gate ASSERT(OK_32PTR(sri)); 4820Sstevel@tonic-gate sri->sinfo_stream = ntohs(dcp->sdh_sid); 4830Sstevel@tonic-gate sri->sinfo_ssn = ntohs(dcp->sdh_ssn); 4840Sstevel@tonic-gate if (SCTP_DATA_GET_UBIT(dcp)) { 4850Sstevel@tonic-gate sri->sinfo_flags = MSG_UNORDERED; 4860Sstevel@tonic-gate } else { 4870Sstevel@tonic-gate sri->sinfo_flags = 0; 4880Sstevel@tonic-gate } 4890Sstevel@tonic-gate sri->sinfo_ppid = dcp->sdh_payload_id; 4900Sstevel@tonic-gate sri->sinfo_context = 0; 4910Sstevel@tonic-gate sri->sinfo_timetolive = 0; 4920Sstevel@tonic-gate sri->sinfo_tsn = ntohl(dcp->sdh_tsn); 4930Sstevel@tonic-gate sri->sinfo_cumtsn = sctp->sctp_ftsn; 4940Sstevel@tonic-gate sri->sinfo_assoc_id = 0; 4950Sstevel@tonic-gate 4960Sstevel@tonic-gate optptr += sizeof (*sri); 4970Sstevel@tonic-gate } 4980Sstevel@tonic-gate 4990Sstevel@tonic-gate /* 5000Sstevel@tonic-gate * If app asked for pktinfo and the index has changed ... 5010Sstevel@tonic-gate * Note that the local address never changes for the connection. 5020Sstevel@tonic-gate */ 5030Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVPKTINFO) { 5040Sstevel@tonic-gate struct in6_pktinfo *pkti; 5050Sstevel@tonic-gate 5060Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5070Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5080Sstevel@tonic-gate cmsg->cmsg_type = IPV6_PKTINFO; 5090Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + sizeof (*pkti); 5100Sstevel@tonic-gate optptr += sizeof (*cmsg); 5110Sstevel@tonic-gate 5120Sstevel@tonic-gate pkti = (struct in6_pktinfo *)optptr; 5130Sstevel@tonic-gate if (sctp->sctp_ipversion == IPV6_VERSION) 5140Sstevel@tonic-gate pkti->ipi6_addr = sctp->sctp_ip6h->ip6_src; 5150Sstevel@tonic-gate else 5160Sstevel@tonic-gate IN6_IPADDR_TO_V4MAPPED(sctp->sctp_ipha->ipha_src, 5170Sstevel@tonic-gate &pkti->ipi6_addr); 5180Sstevel@tonic-gate pkti->ipi6_ifindex = ipp->ipp_ifindex; 5190Sstevel@tonic-gate optptr += sizeof (*pkti); 5200Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5210Sstevel@tonic-gate /* Save as "last" value */ 5220Sstevel@tonic-gate sctp->sctp_recvifindex = ipp->ipp_ifindex; 5230Sstevel@tonic-gate } 5240Sstevel@tonic-gate /* If app asked for hoplimit and it has changed ... */ 5250Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVHOPLIMIT) { 5260Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5270Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5280Sstevel@tonic-gate cmsg->cmsg_type = IPV6_HOPLIMIT; 5290Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + sizeof (uint_t); 5300Sstevel@tonic-gate optptr += sizeof (*cmsg); 5310Sstevel@tonic-gate 5320Sstevel@tonic-gate *(uint_t *)optptr = ipp->ipp_hoplimit; 5330Sstevel@tonic-gate optptr += sizeof (uint_t); 5340Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5350Sstevel@tonic-gate /* Save as "last" value */ 5360Sstevel@tonic-gate sctp->sctp_recvhops = ipp->ipp_hoplimit; 5370Sstevel@tonic-gate } 5380Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVHOPOPTS) { 5390Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5400Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5410Sstevel@tonic-gate cmsg->cmsg_type = IPV6_HOPOPTS; 5420Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + ipp->ipp_hopoptslen; 5430Sstevel@tonic-gate optptr += sizeof (*cmsg); 5440Sstevel@tonic-gate 5450Sstevel@tonic-gate bcopy(ipp->ipp_hopopts, optptr, ipp->ipp_hopoptslen); 5460Sstevel@tonic-gate optptr += ipp->ipp_hopoptslen; 5470Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5480Sstevel@tonic-gate /* Save as last value */ 549*1676Sjpk ip_savebuf((void **)&sctp->sctp_hopopts, 5500Sstevel@tonic-gate &sctp->sctp_hopoptslen, 5510Sstevel@tonic-gate (ipp->ipp_fields & IPPF_HOPOPTS), 5520Sstevel@tonic-gate ipp->ipp_hopopts, ipp->ipp_hopoptslen); 5530Sstevel@tonic-gate } 5540Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVRTDSTOPTS) { 5550Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5560Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5570Sstevel@tonic-gate cmsg->cmsg_type = IPV6_RTHDRDSTOPTS; 5580Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + ipp->ipp_rtdstoptslen; 5590Sstevel@tonic-gate optptr += sizeof (*cmsg); 5600Sstevel@tonic-gate 5610Sstevel@tonic-gate bcopy(ipp->ipp_rtdstopts, optptr, ipp->ipp_rtdstoptslen); 5620Sstevel@tonic-gate optptr += ipp->ipp_rtdstoptslen; 5630Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5640Sstevel@tonic-gate /* Save as last value */ 565*1676Sjpk ip_savebuf((void **)&sctp->sctp_rtdstopts, 5660Sstevel@tonic-gate &sctp->sctp_rtdstoptslen, 5670Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTDSTOPTS), 5680Sstevel@tonic-gate ipp->ipp_rtdstopts, ipp->ipp_rtdstoptslen); 5690Sstevel@tonic-gate } 5700Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVRTHDR) { 5710Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5720Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5730Sstevel@tonic-gate cmsg->cmsg_type = IPV6_RTHDR; 5740Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + ipp->ipp_rthdrlen; 5750Sstevel@tonic-gate optptr += sizeof (*cmsg); 5760Sstevel@tonic-gate 5770Sstevel@tonic-gate bcopy(ipp->ipp_rthdr, optptr, ipp->ipp_rthdrlen); 5780Sstevel@tonic-gate optptr += ipp->ipp_rthdrlen; 5790Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5800Sstevel@tonic-gate /* Save as last value */ 581*1676Sjpk ip_savebuf((void **)&sctp->sctp_rthdr, 5820Sstevel@tonic-gate &sctp->sctp_rthdrlen, 5830Sstevel@tonic-gate (ipp->ipp_fields & IPPF_RTHDR), 5840Sstevel@tonic-gate ipp->ipp_rthdr, ipp->ipp_rthdrlen); 5850Sstevel@tonic-gate } 5860Sstevel@tonic-gate if (addflag & SCTP_IPV6_RECVDSTOPTS) { 5870Sstevel@tonic-gate cmsg = (struct cmsghdr *)optptr; 5880Sstevel@tonic-gate cmsg->cmsg_level = IPPROTO_IPV6; 5890Sstevel@tonic-gate cmsg->cmsg_type = IPV6_DSTOPTS; 5900Sstevel@tonic-gate cmsg->cmsg_len = sizeof (*cmsg) + ipp->ipp_dstoptslen; 5910Sstevel@tonic-gate optptr += sizeof (*cmsg); 5920Sstevel@tonic-gate 5930Sstevel@tonic-gate bcopy(ipp->ipp_dstopts, optptr, ipp->ipp_dstoptslen); 5940Sstevel@tonic-gate optptr += ipp->ipp_dstoptslen; 5950Sstevel@tonic-gate ASSERT(OK_32PTR(optptr)); 5960Sstevel@tonic-gate /* Save as last value */ 597*1676Sjpk ip_savebuf((void **)&sctp->sctp_dstopts, 5980Sstevel@tonic-gate &sctp->sctp_dstoptslen, 5990Sstevel@tonic-gate (ipp->ipp_fields & IPPF_DSTOPTS), 6000Sstevel@tonic-gate ipp->ipp_dstopts, ipp->ipp_dstoptslen); 6010Sstevel@tonic-gate } 6020Sstevel@tonic-gate 6030Sstevel@tonic-gate ASSERT(optptr == mp1->b_wptr); 6040Sstevel@tonic-gate 6050Sstevel@tonic-gate return (0); 6060Sstevel@tonic-gate } 6070Sstevel@tonic-gate 6080Sstevel@tonic-gate void 6090Sstevel@tonic-gate sctp_free_reass(sctp_instr_t *sip) 6100Sstevel@tonic-gate { 6110Sstevel@tonic-gate mblk_t *mp, *mpnext, *mctl; 6120Sstevel@tonic-gate 6130Sstevel@tonic-gate for (mp = sip->istr_reass; mp != NULL; mp = mpnext) { 6140Sstevel@tonic-gate mpnext = mp->b_next; 6150Sstevel@tonic-gate mp->b_next = NULL; 6160Sstevel@tonic-gate mp->b_prev = NULL; 6170Sstevel@tonic-gate if (DB_TYPE(mp) == M_CTL) { 6180Sstevel@tonic-gate mctl = mp; 6190Sstevel@tonic-gate ASSERT(mp->b_cont != NULL); 6200Sstevel@tonic-gate mp = mp->b_cont; 6210Sstevel@tonic-gate mctl->b_cont = NULL; 6220Sstevel@tonic-gate freeb(mctl); 6230Sstevel@tonic-gate } 6240Sstevel@tonic-gate freemsg(mp); 6250Sstevel@tonic-gate } 6260Sstevel@tonic-gate } 6270Sstevel@tonic-gate 6280Sstevel@tonic-gate /* 6290Sstevel@tonic-gate * If the series of data fragments of which dmp is a part is successfully 6300Sstevel@tonic-gate * reassembled, the first mblk in the series is returned. dc is adjusted 6310Sstevel@tonic-gate * to point at the data chunk in the lead mblk, and b_rptr also points to 6320Sstevel@tonic-gate * the data chunk; the following mblk's b_rptr's point at the actual payload. 6330Sstevel@tonic-gate * 6340Sstevel@tonic-gate * If the series is not yet reassembled, NULL is returned. dc is not changed. 6350Sstevel@tonic-gate * XXX should probably move this up into the state machine. 6360Sstevel@tonic-gate */ 6370Sstevel@tonic-gate 6380Sstevel@tonic-gate /* Fragment list for un-ordered messages. Partial delivery is not supported */ 6390Sstevel@tonic-gate static mblk_t * 6400Sstevel@tonic-gate sctp_uodata_frag(sctp_t *sctp, mblk_t *dmp, sctp_data_hdr_t **dc) 6410Sstevel@tonic-gate { 6420Sstevel@tonic-gate mblk_t *hmp; 6430Sstevel@tonic-gate mblk_t *begin = NULL; 6440Sstevel@tonic-gate mblk_t *end = NULL; 6450Sstevel@tonic-gate sctp_data_hdr_t *qdc; 6460Sstevel@tonic-gate uint32_t ntsn; 6470Sstevel@tonic-gate uint32_t tsn = ntohl((*dc)->sdh_tsn); 6480Sstevel@tonic-gate #ifdef DEBUG 6490Sstevel@tonic-gate mblk_t *mp1; 6500Sstevel@tonic-gate #endif 6510Sstevel@tonic-gate 6520Sstevel@tonic-gate /* First frag. */ 6530Sstevel@tonic-gate if (sctp->sctp_uo_frags == NULL) { 6540Sstevel@tonic-gate sctp->sctp_uo_frags = dmp; 6550Sstevel@tonic-gate return (NULL); 6560Sstevel@tonic-gate } 6570Sstevel@tonic-gate hmp = sctp->sctp_uo_frags; 6580Sstevel@tonic-gate /* 6590Sstevel@tonic-gate * Insert the segment according to the TSN, fragmented unordered 6600Sstevel@tonic-gate * chunks are sequenced by TSN. 6610Sstevel@tonic-gate */ 6620Sstevel@tonic-gate while (hmp != NULL) { 6630Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)hmp->b_rptr; 6640Sstevel@tonic-gate ntsn = ntohl(qdc->sdh_tsn); 6650Sstevel@tonic-gate if (SEQ_GT(ntsn, tsn)) { 6660Sstevel@tonic-gate if (hmp->b_prev == NULL) { 6670Sstevel@tonic-gate dmp->b_next = hmp; 6680Sstevel@tonic-gate hmp->b_prev = dmp; 6690Sstevel@tonic-gate sctp->sctp_uo_frags = dmp; 6700Sstevel@tonic-gate } else { 6710Sstevel@tonic-gate dmp->b_next = hmp; 6720Sstevel@tonic-gate dmp->b_prev = hmp->b_prev; 6730Sstevel@tonic-gate hmp->b_prev->b_next = dmp; 6740Sstevel@tonic-gate hmp->b_prev = dmp; 6750Sstevel@tonic-gate } 6760Sstevel@tonic-gate break; 6770Sstevel@tonic-gate } 6780Sstevel@tonic-gate if (hmp->b_next == NULL) { 6790Sstevel@tonic-gate hmp->b_next = dmp; 6800Sstevel@tonic-gate dmp->b_prev = hmp; 6810Sstevel@tonic-gate break; 6820Sstevel@tonic-gate } 6830Sstevel@tonic-gate hmp = hmp->b_next; 6840Sstevel@tonic-gate } 6850Sstevel@tonic-gate /* check if we completed a msg */ 6860Sstevel@tonic-gate if (SCTP_DATA_GET_BBIT(*dc)) { 6870Sstevel@tonic-gate begin = dmp; 6880Sstevel@tonic-gate } else if (SCTP_DATA_GET_EBIT(*dc)) { 6890Sstevel@tonic-gate end = dmp; 6900Sstevel@tonic-gate } 6910Sstevel@tonic-gate /* 6920Sstevel@tonic-gate * We walk consecutive TSNs backwards till we get a seg. with 6930Sstevel@tonic-gate * the B bit 6940Sstevel@tonic-gate */ 6950Sstevel@tonic-gate if (begin == NULL) { 6960Sstevel@tonic-gate for (hmp = dmp->b_prev; hmp != NULL; hmp = hmp->b_prev) { 6970Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)hmp->b_rptr; 6980Sstevel@tonic-gate ntsn = ntohl(qdc->sdh_tsn); 6990Sstevel@tonic-gate if ((int32_t)(tsn - ntsn) > 1) { 7000Sstevel@tonic-gate return (NULL); 7010Sstevel@tonic-gate } 7020Sstevel@tonic-gate if (SCTP_DATA_GET_BBIT(qdc)) { 7030Sstevel@tonic-gate begin = hmp; 7040Sstevel@tonic-gate break; 7050Sstevel@tonic-gate } 7060Sstevel@tonic-gate tsn = ntsn; 7070Sstevel@tonic-gate } 7080Sstevel@tonic-gate } 7090Sstevel@tonic-gate tsn = ntohl((*dc)->sdh_tsn); 7100Sstevel@tonic-gate /* 7110Sstevel@tonic-gate * We walk consecutive TSNs till we get a seg. with the E bit 7120Sstevel@tonic-gate */ 7130Sstevel@tonic-gate if (end == NULL) { 7140Sstevel@tonic-gate for (hmp = dmp->b_next; hmp != NULL; hmp = hmp->b_next) { 7150Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)hmp->b_rptr; 7160Sstevel@tonic-gate ntsn = ntohl(qdc->sdh_tsn); 7170Sstevel@tonic-gate if ((int32_t)(ntsn - tsn) > 1) { 7180Sstevel@tonic-gate return (NULL); 7190Sstevel@tonic-gate } 7200Sstevel@tonic-gate if (SCTP_DATA_GET_EBIT(qdc)) { 7210Sstevel@tonic-gate end = hmp; 7220Sstevel@tonic-gate break; 7230Sstevel@tonic-gate } 7240Sstevel@tonic-gate tsn = ntsn; 7250Sstevel@tonic-gate } 7260Sstevel@tonic-gate } 7270Sstevel@tonic-gate if (begin == NULL || end == NULL) { 7280Sstevel@tonic-gate return (NULL); 7290Sstevel@tonic-gate } 7300Sstevel@tonic-gate /* Got one!, Remove the msg from the list */ 7310Sstevel@tonic-gate if (sctp->sctp_uo_frags == begin) { 7320Sstevel@tonic-gate ASSERT(begin->b_prev == NULL); 7330Sstevel@tonic-gate sctp->sctp_uo_frags = end->b_next; 7340Sstevel@tonic-gate if (end->b_next != NULL) 7350Sstevel@tonic-gate end->b_next->b_prev = NULL; 7360Sstevel@tonic-gate } else { 7370Sstevel@tonic-gate begin->b_prev->b_next = end->b_next; 7380Sstevel@tonic-gate if (end->b_next != NULL) 7390Sstevel@tonic-gate end->b_next->b_prev = begin->b_prev; 7400Sstevel@tonic-gate } 7410Sstevel@tonic-gate begin->b_prev = NULL; 7420Sstevel@tonic-gate end->b_next = NULL; 7430Sstevel@tonic-gate 7440Sstevel@tonic-gate /* 7450Sstevel@tonic-gate * Null out b_next and b_prev and chain using b_cont. 7460Sstevel@tonic-gate */ 7470Sstevel@tonic-gate dmp = end = begin; 7480Sstevel@tonic-gate hmp = begin->b_next; 7490Sstevel@tonic-gate *dc = (sctp_data_hdr_t *)begin->b_rptr; 7500Sstevel@tonic-gate begin->b_next = NULL; 7510Sstevel@tonic-gate while (hmp != NULL) { 7520Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)hmp->b_rptr; 7530Sstevel@tonic-gate hmp->b_rptr = (uchar_t *)(qdc + 1); 7540Sstevel@tonic-gate end = hmp->b_next; 7550Sstevel@tonic-gate dmp->b_cont = hmp; 7560Sstevel@tonic-gate dmp = hmp; 7570Sstevel@tonic-gate 7580Sstevel@tonic-gate if (end != NULL) 7590Sstevel@tonic-gate hmp->b_next = NULL; 7600Sstevel@tonic-gate hmp->b_prev = NULL; 7610Sstevel@tonic-gate hmp = end; 7620Sstevel@tonic-gate } 7630Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_reassmsgs); 7640Sstevel@tonic-gate #ifdef DEBUG 7650Sstevel@tonic-gate mp1 = begin; 7660Sstevel@tonic-gate while (mp1 != NULL) { 7670Sstevel@tonic-gate ASSERT(mp1->b_next == NULL); 7680Sstevel@tonic-gate ASSERT(mp1->b_prev == NULL); 7690Sstevel@tonic-gate mp1 = mp1->b_cont; 7700Sstevel@tonic-gate } 7710Sstevel@tonic-gate #endif 7720Sstevel@tonic-gate return (begin); 7730Sstevel@tonic-gate } 7740Sstevel@tonic-gate /* 7750Sstevel@tonic-gate * Fragment list for ordered messages. 7760Sstevel@tonic-gate * If no error occures, error is set to 0. If we run out of memory, error 7770Sstevel@tonic-gate * is set to 1. If the peer commits a fatal error (like using different 7780Sstevel@tonic-gate * sequence numbers for the same data fragment series), the association is 7790Sstevel@tonic-gate * aborted and error is set to 2. 7800Sstevel@tonic-gate */ 7810Sstevel@tonic-gate static mblk_t * 7820Sstevel@tonic-gate sctp_data_frag(sctp_t *sctp, mblk_t *dmp, sctp_data_hdr_t **dc, int *error, 7830Sstevel@tonic-gate sctp_instr_t *sip, int trypartial, int *tpfinished) 7840Sstevel@tonic-gate { 7850Sstevel@tonic-gate mblk_t *hmp; 7860Sstevel@tonic-gate mblk_t *pmp; 7870Sstevel@tonic-gate mblk_t *qmp; 7880Sstevel@tonic-gate mblk_t *mp; 7890Sstevel@tonic-gate mblk_t *prev; 7900Sstevel@tonic-gate mblk_t *prevprev; 7910Sstevel@tonic-gate mblk_t *first_mp; 7920Sstevel@tonic-gate sctp_reass_t *srp; 7930Sstevel@tonic-gate sctp_data_hdr_t *qdc; 7940Sstevel@tonic-gate sctp_data_hdr_t *bdc; 7950Sstevel@tonic-gate sctp_data_hdr_t *edc; 7960Sstevel@tonic-gate uint32_t tsn; 7970Sstevel@tonic-gate 7980Sstevel@tonic-gate /* 7990Sstevel@tonic-gate * We can overwrite the Link Layer + IP header here, I suppose. 8000Sstevel@tonic-gate * The M_CTL does not leave this function. We need to check 8010Sstevel@tonic-gate * DB_REF(dmp) before using DB_BASE(dmp), since there could be 8020Sstevel@tonic-gate * two fragments for different ssns in the same mblk. 8030Sstevel@tonic-gate */ 8040Sstevel@tonic-gate #define SCTP_NEW_REASS(nmp, dmp, srp, seterror) \ 8050Sstevel@tonic-gate if ((DB_REF(dmp) == 2) && (MBLKHEAD(dmp) >= \ 8060Sstevel@tonic-gate (sizeof (*(srp)) + sizeof (sctp_hdr_t)))) { \ 8070Sstevel@tonic-gate (nmp) = (dmp); \ 8080Sstevel@tonic-gate } else { \ 8090Sstevel@tonic-gate (nmp) = allocb(sizeof (*(srp)), BPRI_MED); \ 8100Sstevel@tonic-gate if ((nmp) == NULL) { \ 8110Sstevel@tonic-gate switch (seterror) { \ 8120Sstevel@tonic-gate case B_TRUE: \ 8130Sstevel@tonic-gate *error = 1; \ 8140Sstevel@tonic-gate break; \ 8150Sstevel@tonic-gate } \ 8160Sstevel@tonic-gate return (NULL); \ 8170Sstevel@tonic-gate } \ 8180Sstevel@tonic-gate DB_TYPE(nmp) = M_CTL; \ 8190Sstevel@tonic-gate (nmp)->b_cont = dmp; \ 8200Sstevel@tonic-gate } \ 8210Sstevel@tonic-gate (srp) = (sctp_reass_t *)DB_BASE(nmp); 8220Sstevel@tonic-gate 8230Sstevel@tonic-gate *error = 0; 8240Sstevel@tonic-gate 8250Sstevel@tonic-gate /* find the reassembly queue for this data chunk */ 8260Sstevel@tonic-gate hmp = qmp = sip->istr_reass; 8270Sstevel@tonic-gate for (; hmp != NULL; hmp = hmp->b_next) { 8280Sstevel@tonic-gate srp = (sctp_reass_t *)DB_BASE(hmp); 8290Sstevel@tonic-gate if (ntohs((*dc)->sdh_ssn) == srp->ssn) 8300Sstevel@tonic-gate goto foundit; 8310Sstevel@tonic-gate else if (SSN_GT(srp->ssn, ntohs((*dc)->sdh_ssn))) 8320Sstevel@tonic-gate break; 8330Sstevel@tonic-gate qmp = hmp; 8340Sstevel@tonic-gate } 8350Sstevel@tonic-gate 8360Sstevel@tonic-gate SCTP_NEW_REASS(pmp, dmp, srp, B_TRUE); 8370Sstevel@tonic-gate srp->ssn = ntohs((*dc)->sdh_ssn); 8380Sstevel@tonic-gate srp->needed = 0; 8390Sstevel@tonic-gate srp->got = 1; 8400Sstevel@tonic-gate srp->tail = dmp; 8410Sstevel@tonic-gate srp->partial_delivered = B_FALSE; 8420Sstevel@tonic-gate 8430Sstevel@tonic-gate if (hmp != NULL) { 8440Sstevel@tonic-gate if (sip->istr_reass == hmp) { 8450Sstevel@tonic-gate sip->istr_reass = pmp; 8460Sstevel@tonic-gate pmp->b_next = hmp; 8470Sstevel@tonic-gate pmp->b_prev = NULL; 8480Sstevel@tonic-gate hmp->b_prev = pmp; 8490Sstevel@tonic-gate } else { 8500Sstevel@tonic-gate qmp->b_next = pmp; 8510Sstevel@tonic-gate pmp->b_prev = qmp; 8520Sstevel@tonic-gate pmp->b_next = hmp; 8530Sstevel@tonic-gate hmp->b_prev = pmp; 8540Sstevel@tonic-gate } 8550Sstevel@tonic-gate } else { 8560Sstevel@tonic-gate /* make a new reass head and stick it on the end */ 8570Sstevel@tonic-gate if (sip->istr_reass == NULL) { 8580Sstevel@tonic-gate sip->istr_reass = pmp; 8590Sstevel@tonic-gate pmp->b_prev = NULL; 8600Sstevel@tonic-gate } else { 8610Sstevel@tonic-gate qmp->b_next = pmp; 8620Sstevel@tonic-gate pmp->b_prev = qmp; 8630Sstevel@tonic-gate } 8640Sstevel@tonic-gate pmp->b_next = NULL; 8650Sstevel@tonic-gate } 8660Sstevel@tonic-gate return (NULL); 8670Sstevel@tonic-gate foundit: 8680Sstevel@tonic-gate /* 8690Sstevel@tonic-gate * else already have a reassembly queue. Insert the new data chunk 8700Sstevel@tonic-gate * in the reassemble queue. Try the tail first, on the assumption 8710Sstevel@tonic-gate * that the fragments are coming in in order. 8720Sstevel@tonic-gate */ 8730Sstevel@tonic-gate 8740Sstevel@tonic-gate qmp = srp->tail; 8750Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)qmp->b_rptr; 8760Sstevel@tonic-gate ASSERT(qmp->b_cont == NULL); 8770Sstevel@tonic-gate 8780Sstevel@tonic-gate /* XXXIs it fine to do this just here? */ 8790Sstevel@tonic-gate if ((*dc)->sdh_sid != qdc->sdh_sid) { 8800Sstevel@tonic-gate /* our peer is fatally confused; XXX abort the assc */ 8810Sstevel@tonic-gate *error = 2; 8820Sstevel@tonic-gate return (NULL); 8830Sstevel@tonic-gate } 8840Sstevel@tonic-gate if (SEQ_GT(ntohl((*dc)->sdh_tsn), ntohl(qdc->sdh_tsn))) { 8850Sstevel@tonic-gate qmp->b_cont = dmp; 8860Sstevel@tonic-gate srp->tail = dmp; 8870Sstevel@tonic-gate dmp->b_cont = NULL; 8880Sstevel@tonic-gate goto inserted; 8890Sstevel@tonic-gate } 8900Sstevel@tonic-gate 8910Sstevel@tonic-gate /* Next check for insertion at the beginning */ 8920Sstevel@tonic-gate qmp = (DB_TYPE(hmp) == M_DATA) ? hmp : hmp->b_cont; 8930Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)qmp->b_rptr; 8940Sstevel@tonic-gate if (SEQ_LT(ntohl((*dc)->sdh_tsn), ntohl(qdc->sdh_tsn))) { 8950Sstevel@tonic-gate if (DB_TYPE(hmp) == M_DATA) { 8960Sstevel@tonic-gate sctp_reass_t *srp1 = srp; 8970Sstevel@tonic-gate 8980Sstevel@tonic-gate SCTP_NEW_REASS(pmp, dmp, srp, B_TRUE); 8990Sstevel@tonic-gate ASSERT(pmp->b_prev == NULL && pmp->b_next == NULL); 9000Sstevel@tonic-gate if (sip->istr_reass == hmp) { 9010Sstevel@tonic-gate sip->istr_reass = pmp; 9020Sstevel@tonic-gate if (hmp->b_next != NULL) { 9030Sstevel@tonic-gate hmp->b_next->b_prev = pmp; 9040Sstevel@tonic-gate pmp->b_next = hmp->b_next; 9050Sstevel@tonic-gate } 9060Sstevel@tonic-gate } else { 9070Sstevel@tonic-gate hmp->b_prev->b_next = pmp; 9080Sstevel@tonic-gate pmp->b_prev = hmp->b_prev; 9090Sstevel@tonic-gate if (hmp->b_next != NULL) { 9100Sstevel@tonic-gate hmp->b_next->b_prev = pmp; 9110Sstevel@tonic-gate pmp->b_next = hmp->b_next; 9120Sstevel@tonic-gate } 9130Sstevel@tonic-gate } 9140Sstevel@tonic-gate srp->ssn = srp1->ssn; 9150Sstevel@tonic-gate srp->needed = srp1->needed; 9160Sstevel@tonic-gate srp->got = srp1->got; 9170Sstevel@tonic-gate srp->tail = srp1->tail; 9180Sstevel@tonic-gate srp->partial_delivered = srp1->partial_delivered; 9190Sstevel@tonic-gate hmp->b_next = hmp->b_prev = NULL; 9200Sstevel@tonic-gate dmp->b_cont = hmp; 9210Sstevel@tonic-gate hmp = pmp; 9220Sstevel@tonic-gate } else { 9230Sstevel@tonic-gate ASSERT(DB_TYPE(hmp) == M_CTL); 9240Sstevel@tonic-gate dmp->b_cont = qmp; 9250Sstevel@tonic-gate hmp->b_cont = dmp; 9260Sstevel@tonic-gate } 9270Sstevel@tonic-gate goto inserted; 9280Sstevel@tonic-gate } 9290Sstevel@tonic-gate 9300Sstevel@tonic-gate /* Insert somewhere in the middle */ 9310Sstevel@tonic-gate for (;;) { 9320Sstevel@tonic-gate /* Tail check above should have caught this */ 9330Sstevel@tonic-gate ASSERT(qmp->b_cont != NULL); 9340Sstevel@tonic-gate 9350Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)qmp->b_cont->b_rptr; 9360Sstevel@tonic-gate if (SEQ_LT(ntohl((*dc)->sdh_tsn), ntohl(qdc->sdh_tsn))) { 9370Sstevel@tonic-gate /* insert here */ 9380Sstevel@tonic-gate dmp->b_cont = qmp->b_cont; 9390Sstevel@tonic-gate qmp->b_cont = dmp; 9400Sstevel@tonic-gate break; 9410Sstevel@tonic-gate } 9420Sstevel@tonic-gate qmp = qmp->b_cont; 9430Sstevel@tonic-gate } 9440Sstevel@tonic-gate 9450Sstevel@tonic-gate inserted: 9460Sstevel@tonic-gate (srp->got)++; 9470Sstevel@tonic-gate first_mp = (DB_TYPE(hmp) == M_DATA) ? hmp : hmp->b_cont; 9480Sstevel@tonic-gate if (srp->needed == 0) { 9490Sstevel@tonic-gate /* check if we have the first and last fragments */ 9500Sstevel@tonic-gate bdc = (sctp_data_hdr_t *)first_mp->b_rptr; 9510Sstevel@tonic-gate edc = (sctp_data_hdr_t *)srp->tail->b_rptr; 9520Sstevel@tonic-gate 9530Sstevel@tonic-gate /* calculate how many fragments are needed, if possible */ 9540Sstevel@tonic-gate if (SCTP_DATA_GET_BBIT(bdc) && SCTP_DATA_GET_EBIT(edc)) 9550Sstevel@tonic-gate srp->needed = ntohl(edc->sdh_tsn) - 9560Sstevel@tonic-gate ntohl(bdc->sdh_tsn) + 1; 9570Sstevel@tonic-gate } 9580Sstevel@tonic-gate 9590Sstevel@tonic-gate if (srp->needed != srp->got) { 9600Sstevel@tonic-gate if (!trypartial) 9610Sstevel@tonic-gate return (NULL); 9620Sstevel@tonic-gate /* 9630Sstevel@tonic-gate * Try partial delivery. We need a consecutive run of 9640Sstevel@tonic-gate * at least two chunks, starting from the first chunk 9650Sstevel@tonic-gate * (which may have been the last + 1 chunk from a 9660Sstevel@tonic-gate * previous partial delivery). 9670Sstevel@tonic-gate */ 9680Sstevel@tonic-gate dprint(4, ("trypartial: got=%d, needed=%d\n", 9690Sstevel@tonic-gate (int)(srp->got), (int)(srp->needed))); 9700Sstevel@tonic-gate mp = first_mp; 9710Sstevel@tonic-gate if (mp->b_cont == NULL) { 9720Sstevel@tonic-gate /* need at least two chunks */ 9730Sstevel@tonic-gate dprint(4, ("trypartial: only 1 chunk\n")); 9740Sstevel@tonic-gate return (NULL); 9750Sstevel@tonic-gate } 9760Sstevel@tonic-gate 9770Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)mp->b_rptr; 9780Sstevel@tonic-gate if (!SCTP_DATA_GET_BBIT(qdc)) { 9790Sstevel@tonic-gate /* don't have first chunk; can't do it. */ 9800Sstevel@tonic-gate dprint(4, ("trypartial: no beginning\n")); 9810Sstevel@tonic-gate return (NULL); 9820Sstevel@tonic-gate } 9830Sstevel@tonic-gate 9840Sstevel@tonic-gate tsn = ntohl(qdc->sdh_tsn) + 1; 9850Sstevel@tonic-gate 9860Sstevel@tonic-gate /* 9870Sstevel@tonic-gate * This loop has two exit conditions: the 9880Sstevel@tonic-gate * end of received chunks has been reached, or 9890Sstevel@tonic-gate * there is a break in the sequence. We want 9900Sstevel@tonic-gate * to chop the reassembly list as follows (the 9910Sstevel@tonic-gate * numbers are TSNs): 9920Sstevel@tonic-gate * 10 -> 11 -> | 12 (end of chunks) 9930Sstevel@tonic-gate * 10 -> 11 -> | 12 -> 14 (break in sequence) 9940Sstevel@tonic-gate */ 9950Sstevel@tonic-gate prevprev = prev = mp; 9960Sstevel@tonic-gate mp = mp->b_cont; 9970Sstevel@tonic-gate while (mp != NULL) { 9980Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)mp->b_rptr; 9990Sstevel@tonic-gate if (ntohl(qdc->sdh_tsn) != tsn) { 10000Sstevel@tonic-gate /* 10010Sstevel@tonic-gate * break in sequence. 10020Sstevel@tonic-gate * 1st and 2nd chunks are not sequntial. 10030Sstevel@tonic-gate */ 10040Sstevel@tonic-gate if (mp == first_mp->b_cont) 10050Sstevel@tonic-gate return (NULL); 10060Sstevel@tonic-gate /* Back up mp and prev */ 10070Sstevel@tonic-gate mp = prev; 10080Sstevel@tonic-gate prev = prevprev; 10090Sstevel@tonic-gate break; 10100Sstevel@tonic-gate } 10110Sstevel@tonic-gate 10120Sstevel@tonic-gate /* end of sequence */ 10130Sstevel@tonic-gate if (mp->b_cont == NULL) 10140Sstevel@tonic-gate break; 10150Sstevel@tonic-gate 10160Sstevel@tonic-gate prevprev = prev; 10170Sstevel@tonic-gate prev = mp; 10180Sstevel@tonic-gate mp = mp->b_cont; 10190Sstevel@tonic-gate tsn++; 10200Sstevel@tonic-gate } 10210Sstevel@tonic-gate if (DB_TYPE(hmp) == M_DATA) { 10220Sstevel@tonic-gate sctp_reass_t *srp1 = srp; 10230Sstevel@tonic-gate 10240Sstevel@tonic-gate SCTP_NEW_REASS(pmp, mp, srp, B_FALSE); 10250Sstevel@tonic-gate ASSERT(pmp->b_prev == NULL && pmp->b_next == NULL); 10260Sstevel@tonic-gate if (sip->istr_reass == hmp) { 10270Sstevel@tonic-gate sip->istr_reass = pmp; 10280Sstevel@tonic-gate if (hmp->b_next != NULL) { 10290Sstevel@tonic-gate hmp->b_next->b_prev = pmp; 10300Sstevel@tonic-gate pmp->b_next = hmp->b_next; 10310Sstevel@tonic-gate } 10320Sstevel@tonic-gate } else { 10330Sstevel@tonic-gate hmp->b_prev->b_next = pmp; 10340Sstevel@tonic-gate pmp->b_prev = hmp->b_prev; 10350Sstevel@tonic-gate if (hmp->b_next != NULL) { 10360Sstevel@tonic-gate hmp->b_next->b_prev = pmp; 10370Sstevel@tonic-gate pmp->b_next = hmp->b_next; 10380Sstevel@tonic-gate } 10390Sstevel@tonic-gate } 10400Sstevel@tonic-gate srp->ssn = srp1->ssn; 10410Sstevel@tonic-gate srp->needed = srp1->needed; 10420Sstevel@tonic-gate srp->got = srp1->got; 10430Sstevel@tonic-gate srp->tail = srp1->tail; 10440Sstevel@tonic-gate hmp->b_next = hmp->b_prev = NULL; 10450Sstevel@tonic-gate dmp = hmp; 10460Sstevel@tonic-gate hmp = pmp; 10470Sstevel@tonic-gate } else { 10480Sstevel@tonic-gate ASSERT(DB_TYPE(hmp) == M_CTL); 10490Sstevel@tonic-gate dmp = hmp->b_cont; 10500Sstevel@tonic-gate hmp->b_cont = mp; 10510Sstevel@tonic-gate } 10520Sstevel@tonic-gate /* 10530Sstevel@tonic-gate * mp now points at the last chunk in the sequence, 10540Sstevel@tonic-gate * and prev points to mp's previous in the list. 10550Sstevel@tonic-gate * We chop the list at prev, and convert mp into the 10560Sstevel@tonic-gate * new list head by setting the B bit. Subsequence 10570Sstevel@tonic-gate * fragment deliveries will follow the normal reassembly 10580Sstevel@tonic-gate * path. 10590Sstevel@tonic-gate */ 10600Sstevel@tonic-gate prev->b_cont = NULL; 10610Sstevel@tonic-gate bdc = (sctp_data_hdr_t *)mp->b_rptr; 10620Sstevel@tonic-gate SCTP_DATA_SET_BBIT(bdc); 10630Sstevel@tonic-gate *tpfinished = 0; 10640Sstevel@tonic-gate srp->partial_delivered = B_TRUE; 10650Sstevel@tonic-gate 10660Sstevel@tonic-gate dprint(4, ("trypartial: got some, got=%d, needed=%d\n", 10670Sstevel@tonic-gate (int)(srp->got), (int)(srp->needed))); 10680Sstevel@tonic-gate goto fixup; 10690Sstevel@tonic-gate } 10700Sstevel@tonic-gate 10710Sstevel@tonic-gate /* 10720Sstevel@tonic-gate * else reassembly done; prepare the data for delivery. 10730Sstevel@tonic-gate * First unlink hmp from the ssn list. 10740Sstevel@tonic-gate */ 10750Sstevel@tonic-gate if (sip->istr_reass == hmp) { 10760Sstevel@tonic-gate sip->istr_reass = hmp->b_next; 10770Sstevel@tonic-gate if (hmp->b_next) { 10780Sstevel@tonic-gate hmp->b_next->b_prev = NULL; 10790Sstevel@tonic-gate } 10800Sstevel@tonic-gate } else { 10810Sstevel@tonic-gate ASSERT(hmp->b_prev != NULL); 10820Sstevel@tonic-gate hmp->b_prev->b_next = hmp->b_next; 10830Sstevel@tonic-gate if (hmp->b_next) { 10840Sstevel@tonic-gate hmp->b_next->b_prev = hmp->b_prev; 10850Sstevel@tonic-gate } 10860Sstevel@tonic-gate } 10870Sstevel@tonic-gate 10880Sstevel@tonic-gate /* 10890Sstevel@tonic-gate * Using b_prev and b_next was a little sinful, but OK since 10900Sstevel@tonic-gate * this mblk is never put*'d. However, freeb() will still 10910Sstevel@tonic-gate * ASSERT that they are unused, so we need to NULL them out now. 10920Sstevel@tonic-gate */ 10930Sstevel@tonic-gate hmp->b_next = NULL; 10940Sstevel@tonic-gate hmp->b_prev = NULL; 10950Sstevel@tonic-gate dmp = hmp; 10960Sstevel@tonic-gate if (DB_TYPE(hmp) == M_CTL) { 10970Sstevel@tonic-gate dmp = dmp->b_cont; 10980Sstevel@tonic-gate hmp->b_cont = NULL; 10990Sstevel@tonic-gate freeb(hmp); 11000Sstevel@tonic-gate } 11010Sstevel@tonic-gate *tpfinished = 1; 11020Sstevel@tonic-gate 11030Sstevel@tonic-gate fixup: 11040Sstevel@tonic-gate /* 11050Sstevel@tonic-gate * Adjust all mblk's except the lead so their rptr's point to the 11060Sstevel@tonic-gate * payload. sctp_data_chunk() will need to process the lead's 11070Sstevel@tonic-gate * data chunk section, so leave it's rptr pointing at the data chunk. 11080Sstevel@tonic-gate */ 11090Sstevel@tonic-gate *dc = (sctp_data_hdr_t *)dmp->b_rptr; 11100Sstevel@tonic-gate if (trypartial && !(*tpfinished)) { 11110Sstevel@tonic-gate (srp->got)--; 11120Sstevel@tonic-gate ASSERT(srp->got != 0); 11130Sstevel@tonic-gate if (srp->needed != 0) { 11140Sstevel@tonic-gate (srp->needed)--; 11150Sstevel@tonic-gate ASSERT(srp->needed != 0); 11160Sstevel@tonic-gate } 11170Sstevel@tonic-gate } 11180Sstevel@tonic-gate for (qmp = dmp->b_cont; qmp; qmp = qmp->b_cont) { 11190Sstevel@tonic-gate qdc = (sctp_data_hdr_t *)qmp->b_rptr; 11200Sstevel@tonic-gate qmp->b_rptr = (uchar_t *)(qdc + 1); 11210Sstevel@tonic-gate 11220Sstevel@tonic-gate /* 11230Sstevel@tonic-gate * If in partial delivery, deduct the balance from got 11240Sstevel@tonic-gate * and needed here, now that we know we are actually 11250Sstevel@tonic-gate * delivering these data. 11260Sstevel@tonic-gate */ 11270Sstevel@tonic-gate if (trypartial && !(*tpfinished)) { 11280Sstevel@tonic-gate (srp->got)--; 11290Sstevel@tonic-gate ASSERT(srp->got != 0); 11300Sstevel@tonic-gate if (srp->needed != 0) { 11310Sstevel@tonic-gate (srp->needed)--; 11320Sstevel@tonic-gate ASSERT(srp->needed != 0); 11330Sstevel@tonic-gate } 11340Sstevel@tonic-gate } 11350Sstevel@tonic-gate } 11360Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_reassmsgs); 11370Sstevel@tonic-gate 11380Sstevel@tonic-gate return (dmp); 11390Sstevel@tonic-gate } 11400Sstevel@tonic-gate 11410Sstevel@tonic-gate static void 11420Sstevel@tonic-gate sctp_add_dup(uint32_t tsn, mblk_t **dups) 11430Sstevel@tonic-gate { 11440Sstevel@tonic-gate mblk_t *mp; 11450Sstevel@tonic-gate size_t bsize = SCTP_DUP_MBLK_SZ * sizeof (tsn); 11460Sstevel@tonic-gate 11470Sstevel@tonic-gate if (dups == NULL) { 11480Sstevel@tonic-gate return; 11490Sstevel@tonic-gate } 11500Sstevel@tonic-gate 11510Sstevel@tonic-gate /* first time? */ 11520Sstevel@tonic-gate if (*dups == NULL) { 11530Sstevel@tonic-gate *dups = allocb(bsize, BPRI_MED); 11540Sstevel@tonic-gate if (*dups == NULL) { 11550Sstevel@tonic-gate return; 11560Sstevel@tonic-gate } 11570Sstevel@tonic-gate } 11580Sstevel@tonic-gate 11590Sstevel@tonic-gate mp = *dups; 11600Sstevel@tonic-gate if ((mp->b_wptr - mp->b_rptr) >= bsize) { 11610Sstevel@tonic-gate /* maximum reached */ 11620Sstevel@tonic-gate return; 11630Sstevel@tonic-gate } 11640Sstevel@tonic-gate 11650Sstevel@tonic-gate /* add the duplicate tsn */ 11660Sstevel@tonic-gate bcopy(&tsn, mp->b_wptr, sizeof (tsn)); 11670Sstevel@tonic-gate mp->b_wptr += sizeof (tsn); 11680Sstevel@tonic-gate ASSERT((mp->b_wptr - mp->b_rptr) <= bsize); 11690Sstevel@tonic-gate } 11700Sstevel@tonic-gate 11710Sstevel@tonic-gate static void 11720Sstevel@tonic-gate sctp_data_chunk(sctp_t *sctp, sctp_chunk_hdr_t *ch, mblk_t *mp, mblk_t **dups, 11730Sstevel@tonic-gate sctp_faddr_t *fp, ip6_pkt_t *ipp) 11740Sstevel@tonic-gate { 11750Sstevel@tonic-gate sctp_data_hdr_t *dc; 11760Sstevel@tonic-gate mblk_t *dmp, *pmp; 11770Sstevel@tonic-gate mblk_t *errmp; 11780Sstevel@tonic-gate sctp_instr_t *instr; 11790Sstevel@tonic-gate int ubit; 11800Sstevel@tonic-gate int isfrag; 11810Sstevel@tonic-gate uint16_t ssn; 11820Sstevel@tonic-gate uint32_t oftsn; 11830Sstevel@tonic-gate boolean_t can_deliver = B_TRUE; 11840Sstevel@tonic-gate uint32_t tsn; 11850Sstevel@tonic-gate int dlen; 11860Sstevel@tonic-gate int trypartial = 0; 11870Sstevel@tonic-gate int tpfinished = 1; 11880Sstevel@tonic-gate int32_t new_rwnd; 11890Sstevel@tonic-gate 11900Sstevel@tonic-gate /* The following are used multiple times, so we inline them */ 11910Sstevel@tonic-gate #define SCTP_ACK_IT(sctp, tsn) \ 11920Sstevel@tonic-gate if (tsn == sctp->sctp_ftsn) { \ 11930Sstevel@tonic-gate dprint(2, ("data_chunk: acking next %x\n", tsn)); \ 11940Sstevel@tonic-gate (sctp->sctp_ftsn)++; \ 11950Sstevel@tonic-gate } else if (SEQ_GT(tsn, sctp->sctp_ftsn)) { \ 11960Sstevel@tonic-gate /* Got a gap; record it */ \ 11970Sstevel@tonic-gate dprint(2, ("data_chunk: acking gap %x\n", tsn)); \ 11980Sstevel@tonic-gate sctp_ack_add(&sctp->sctp_sack_info, \ 11990Sstevel@tonic-gate tsn, \ 12000Sstevel@tonic-gate &sctp->sctp_sack_gaps); \ 12010Sstevel@tonic-gate sctp->sctp_force_sack = 1; \ 12020Sstevel@tonic-gate } 12030Sstevel@tonic-gate 12040Sstevel@tonic-gate errmp = NULL; 12050Sstevel@tonic-gate dmp = NULL; 12060Sstevel@tonic-gate 12070Sstevel@tonic-gate dc = (sctp_data_hdr_t *)ch; 12080Sstevel@tonic-gate tsn = ntohl(dc->sdh_tsn); 12090Sstevel@tonic-gate 1210*1676Sjpk dprint(3, ("sctp_data_chunk: mp=%p tsn=%x\n", (void *)mp, tsn)); 12110Sstevel@tonic-gate 12120Sstevel@tonic-gate /* Check for duplicates */ 12130Sstevel@tonic-gate if (SEQ_LT(tsn, sctp->sctp_ftsn)) { 12140Sstevel@tonic-gate dprint(4, ("sctp_data_chunk: dropping duplicate\n")); 12150Sstevel@tonic-gate sctp->sctp_force_sack = 1; 12160Sstevel@tonic-gate sctp_add_dup(dc->sdh_tsn, dups); 12170Sstevel@tonic-gate return; 12180Sstevel@tonic-gate } 12190Sstevel@tonic-gate 12200Sstevel@tonic-gate if (sctp->sctp_sack_info != NULL) { 12210Sstevel@tonic-gate sctp_set_t *sp; 12220Sstevel@tonic-gate 12230Sstevel@tonic-gate for (sp = sctp->sctp_sack_info; sp; sp = sp->next) { 12240Sstevel@tonic-gate if (SEQ_GEQ(tsn, sp->begin) && SEQ_LEQ(tsn, sp->end)) { 12250Sstevel@tonic-gate dprint(4, 12260Sstevel@tonic-gate ("sctp_data_chunk: dropping dup > cumtsn\n")); 12270Sstevel@tonic-gate sctp->sctp_force_sack = 1; 12280Sstevel@tonic-gate sctp_add_dup(dc->sdh_tsn, dups); 12290Sstevel@tonic-gate return; 12300Sstevel@tonic-gate } 12310Sstevel@tonic-gate } 12320Sstevel@tonic-gate } 12330Sstevel@tonic-gate 12340Sstevel@tonic-gate /* We cannot deliver anything up now but we still need to handle it. */ 12350Sstevel@tonic-gate if (SCTP_IS_DETACHED(sctp)) { 12360Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInClosed); 12370Sstevel@tonic-gate can_deliver = B_FALSE; 12380Sstevel@tonic-gate } 12390Sstevel@tonic-gate 12400Sstevel@tonic-gate dlen = ntohs(dc->sdh_len) - sizeof (*dc); 12410Sstevel@tonic-gate 12420Sstevel@tonic-gate /* Check for buffer space */ 12430Sstevel@tonic-gate if (sctp->sctp_rwnd - sctp->sctp_rxqueued < dlen) { 12440Sstevel@tonic-gate /* Drop and SACK, but don't advance the cumulative TSN. */ 12450Sstevel@tonic-gate sctp->sctp_force_sack = 1; 12460Sstevel@tonic-gate dprint(0, ("sctp_data_chunk: exceed rwnd %d rxqueued %d " 12470Sstevel@tonic-gate "ssn %d tsn %x\n", sctp->sctp_rwnd, 12480Sstevel@tonic-gate sctp->sctp_rxqueued, dc->sdh_ssn, ntohl(dc->sdh_tsn))); 12490Sstevel@tonic-gate return; 12500Sstevel@tonic-gate } 12510Sstevel@tonic-gate 12520Sstevel@tonic-gate if (ntohs(dc->sdh_sid) >= sctp->sctp_num_istr) { 12530Sstevel@tonic-gate uint16_t inval_parm[2]; 12540Sstevel@tonic-gate 12550Sstevel@tonic-gate inval_parm[0] = dc->sdh_sid; 12560Sstevel@tonic-gate /* RESERVED to be ignored at the receiving end */ 12570Sstevel@tonic-gate inval_parm[1] = 0; 12580Sstevel@tonic-gate /* ack and drop it */ 12590Sstevel@tonic-gate errmp = sctp_make_err(sctp, SCTP_ERR_BAD_SID, 12600Sstevel@tonic-gate (char *)inval_parm, sizeof (inval_parm)); 12610Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 12620Sstevel@tonic-gate if (errmp != NULL) 12630Sstevel@tonic-gate sctp_send_err(sctp, errmp, NULL); 12640Sstevel@tonic-gate return; 12650Sstevel@tonic-gate } 12660Sstevel@tonic-gate 12670Sstevel@tonic-gate ubit = SCTP_DATA_GET_UBIT(dc); 12680Sstevel@tonic-gate ASSERT(sctp->sctp_instr != NULL); 12690Sstevel@tonic-gate instr = &sctp->sctp_instr[ntohs(dc->sdh_sid)]; 12700Sstevel@tonic-gate /* Initialize the stream, if not yet used */ 12710Sstevel@tonic-gate if (instr->sctp == NULL) 12720Sstevel@tonic-gate instr->sctp = sctp; 12730Sstevel@tonic-gate /* 12740Sstevel@tonic-gate * If we are getting low on buffers set trypartial to try 12750Sstevel@tonic-gate * a partial delivery if we are reassembling a fragmented 12760Sstevel@tonic-gate * message. Only do this if we can immediately deliver the 12770Sstevel@tonic-gate * partially assembled message, and only partially deliver 12780Sstevel@tonic-gate * one message at a time (i.e. messages cannot be intermixed 12790Sstevel@tonic-gate * arriving at the upper layer). A simple way to enforce 12800Sstevel@tonic-gate * this is to only try partial delivery if this TSN is 12810Sstevel@tonic-gate * the next expected TSN. Partial Delivery not supported 12820Sstevel@tonic-gate * for un-ordered message. 12830Sstevel@tonic-gate */ 12840Sstevel@tonic-gate isfrag = !(SCTP_DATA_GET_BBIT(dc) && SCTP_DATA_GET_EBIT(dc)); 12850Sstevel@tonic-gate ssn = ntohs(dc->sdh_ssn); 12860Sstevel@tonic-gate if ((sctp->sctp_rwnd - sctp->sctp_rxqueued < SCTP_RECV_LOWATER) && 12870Sstevel@tonic-gate !ubit && isfrag && (tsn == sctp->sctp_ftsn)) { 12880Sstevel@tonic-gate trypartial = 1; 12890Sstevel@tonic-gate } 12900Sstevel@tonic-gate 12910Sstevel@tonic-gate dmp = dupb(mp); 12920Sstevel@tonic-gate if (dmp == NULL) { 12930Sstevel@tonic-gate /* drop it and don't ack it, causing the peer to retransmit */ 12940Sstevel@tonic-gate return; 12950Sstevel@tonic-gate } 12960Sstevel@tonic-gate dmp->b_wptr = (uchar_t *)ch + ntohs(ch->sch_len); 12970Sstevel@tonic-gate 12980Sstevel@tonic-gate sctp->sctp_rxqueued += dlen; 12990Sstevel@tonic-gate 13000Sstevel@tonic-gate oftsn = sctp->sctp_ftsn; 13010Sstevel@tonic-gate 13020Sstevel@tonic-gate if (isfrag) { 13030Sstevel@tonic-gate int error = 0; 13040Sstevel@tonic-gate 13050Sstevel@tonic-gate /* fragmented data chunk */ 13060Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)dc; 13070Sstevel@tonic-gate if (ubit) { 13080Sstevel@tonic-gate dmp = sctp_uodata_frag(sctp, dmp, &dc); 13090Sstevel@tonic-gate #if DEBUG 13100Sstevel@tonic-gate if (dmp != NULL) { 13110Sstevel@tonic-gate ASSERT(instr == 13120Sstevel@tonic-gate &sctp->sctp_instr[ntohs(dc->sdh_sid)]); 13130Sstevel@tonic-gate } 13140Sstevel@tonic-gate #endif 13150Sstevel@tonic-gate } else { 13160Sstevel@tonic-gate dmp = sctp_data_frag(sctp, dmp, &dc, &error, instr, 13170Sstevel@tonic-gate trypartial, &tpfinished); 13180Sstevel@tonic-gate } 13190Sstevel@tonic-gate if (error != 0) { 13200Sstevel@tonic-gate sctp->sctp_rxqueued -= dlen; 13210Sstevel@tonic-gate if (error == 1) { 13220Sstevel@tonic-gate /* 13230Sstevel@tonic-gate * out of memory; don't ack it so 13240Sstevel@tonic-gate * the peer retransmits 13250Sstevel@tonic-gate */ 13260Sstevel@tonic-gate return; 13270Sstevel@tonic-gate } else if (error == 2) { 13280Sstevel@tonic-gate /* 13290Sstevel@tonic-gate * fatal error (i.e. peer used different 13300Sstevel@tonic-gate * ssn's for same fragmented data) -- 13310Sstevel@tonic-gate * the association has been aborted. 13320Sstevel@tonic-gate * XXX need to return errval so state 13330Sstevel@tonic-gate * machine can also abort processing. 13340Sstevel@tonic-gate */ 13350Sstevel@tonic-gate dprint(0, ("error 2: must not happen!\n")); 13360Sstevel@tonic-gate return; 13370Sstevel@tonic-gate } 13380Sstevel@tonic-gate } 13390Sstevel@tonic-gate 13400Sstevel@tonic-gate if (dmp == NULL) { 13410Sstevel@tonic-gate /* 13420Sstevel@tonic-gate * Can't process this data now, but the cumulative 13430Sstevel@tonic-gate * TSN may be advanced, so do the checks at done. 13440Sstevel@tonic-gate */ 13450Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 13460Sstevel@tonic-gate goto done; 13470Sstevel@tonic-gate } 13480Sstevel@tonic-gate } 13490Sstevel@tonic-gate 13500Sstevel@tonic-gate if (!ubit && !trypartial && ssn != instr->nextseq) { 13510Sstevel@tonic-gate /* Adjust rptr to point at the data chunk for compares */ 13520Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)dc; 13530Sstevel@tonic-gate 13540Sstevel@tonic-gate dprint(2, 13550Sstevel@tonic-gate ("data_chunk: inserted %x in pq (ssn %d expected %d)\n", 13560Sstevel@tonic-gate ntohl(dc->sdh_tsn), (int)(ssn), (int)(instr->nextseq))); 13570Sstevel@tonic-gate 13580Sstevel@tonic-gate if (instr->istr_msgs == NULL) { 13590Sstevel@tonic-gate instr->istr_msgs = dmp; 13600Sstevel@tonic-gate ASSERT(dmp->b_prev == NULL && dmp->b_next == NULL); 13610Sstevel@tonic-gate } else { 13620Sstevel@tonic-gate mblk_t *imblk = instr->istr_msgs; 13630Sstevel@tonic-gate sctp_data_hdr_t *idc; 13640Sstevel@tonic-gate 13650Sstevel@tonic-gate /* 13660Sstevel@tonic-gate * XXXNeed to take sequence wraps into account, 13670Sstevel@tonic-gate * ... and a more efficient insertion algo. 13680Sstevel@tonic-gate */ 13690Sstevel@tonic-gate for (;;) { 13700Sstevel@tonic-gate idc = (sctp_data_hdr_t *)imblk->b_rptr; 13710Sstevel@tonic-gate if (SSN_GT(ntohs(idc->sdh_ssn), 13720Sstevel@tonic-gate ntohs(dc->sdh_ssn))) { 13730Sstevel@tonic-gate if (instr->istr_msgs == imblk) { 13740Sstevel@tonic-gate instr->istr_msgs = dmp; 13750Sstevel@tonic-gate dmp->b_next = imblk; 13760Sstevel@tonic-gate imblk->b_prev = dmp; 13770Sstevel@tonic-gate } else { 13780Sstevel@tonic-gate ASSERT(imblk->b_prev != NULL); 13790Sstevel@tonic-gate imblk->b_prev->b_next = dmp; 13800Sstevel@tonic-gate dmp->b_prev = imblk->b_prev; 13810Sstevel@tonic-gate imblk->b_prev = dmp; 13820Sstevel@tonic-gate dmp->b_next = imblk; 13830Sstevel@tonic-gate } 13840Sstevel@tonic-gate break; 13850Sstevel@tonic-gate } 13860Sstevel@tonic-gate if (imblk->b_next == NULL) { 13870Sstevel@tonic-gate imblk->b_next = dmp; 13880Sstevel@tonic-gate dmp->b_prev = imblk; 13890Sstevel@tonic-gate break; 13900Sstevel@tonic-gate } 13910Sstevel@tonic-gate imblk = imblk->b_next; 13920Sstevel@tonic-gate } 13930Sstevel@tonic-gate } 13940Sstevel@tonic-gate (instr->istr_nmsgs)++; 13950Sstevel@tonic-gate (sctp->sctp_istr_nmsgs)++; 13960Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 13970Sstevel@tonic-gate return; 13980Sstevel@tonic-gate } 13990Sstevel@tonic-gate 14000Sstevel@tonic-gate /* 14010Sstevel@tonic-gate * Else we can deliver the data directly. Recalculate 14020Sstevel@tonic-gate * dlen now since we may have reassembled data. 14030Sstevel@tonic-gate */ 14040Sstevel@tonic-gate dlen = dmp->b_wptr - (uchar_t *)dc - sizeof (*dc); 14050Sstevel@tonic-gate for (pmp = dmp->b_cont; pmp != NULL; pmp = pmp->b_cont) 14060Sstevel@tonic-gate dlen += pmp->b_wptr - pmp->b_rptr; 14070Sstevel@tonic-gate ASSERT(sctp->sctp_rxqueued >= dlen); 14080Sstevel@tonic-gate ASSERT(sctp->sctp_rwnd >= dlen); 14090Sstevel@tonic-gate 14100Sstevel@tonic-gate /* Deliver the message. */ 14110Sstevel@tonic-gate sctp->sctp_rxqueued -= dlen; 14120Sstevel@tonic-gate 14130Sstevel@tonic-gate if (can_deliver) { 14140Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)(dc + 1); 14150Sstevel@tonic-gate if (sctp_input_add_ancillary(sctp, &dmp, dc, fp, ipp) == 0) { 14160Sstevel@tonic-gate dprint(1, ("sctp_data_chunk: delivering %lu bytes\n", 14170Sstevel@tonic-gate msgdsize(dmp))); 14180Sstevel@tonic-gate sctp->sctp_rwnd -= dlen; 14190Sstevel@tonic-gate new_rwnd = sctp->sctp_ulp_recv(sctp->sctp_ulpd, dmp, 14200Sstevel@tonic-gate tpfinished ? 0 : SCTP_PARTIAL_DATA); 14210Sstevel@tonic-gate if (new_rwnd > sctp->sctp_rwnd) { 14220Sstevel@tonic-gate sctp->sctp_rwnd = new_rwnd; 14230Sstevel@tonic-gate } 14240Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 14250Sstevel@tonic-gate } else { 14260Sstevel@tonic-gate /* Just free the message if we don't have memory. */ 14270Sstevel@tonic-gate freemsg(dmp); 14280Sstevel@tonic-gate return; 14290Sstevel@tonic-gate } 14300Sstevel@tonic-gate } else { 14310Sstevel@tonic-gate /* About to free the data */ 14320Sstevel@tonic-gate freemsg(dmp); 14330Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 14340Sstevel@tonic-gate } 14350Sstevel@tonic-gate 14360Sstevel@tonic-gate /* 14370Sstevel@tonic-gate * data, now enqueued, may already have been processed and free'd 14380Sstevel@tonic-gate * by the ULP (or we may have just freed it above, if we could not 14390Sstevel@tonic-gate * deliver it), so we must not reference it (this is why we kept 14400Sstevel@tonic-gate * the ssn and ubit above). 14410Sstevel@tonic-gate */ 14420Sstevel@tonic-gate if (ubit != 0) { 14430Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_iudchunks); 14440Sstevel@tonic-gate goto done; 14450Sstevel@tonic-gate } 14460Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_idchunks); 14470Sstevel@tonic-gate 14480Sstevel@tonic-gate /* 14490Sstevel@tonic-gate * If there was a partial delivery and it has not finished, 14500Sstevel@tonic-gate * don't pull anything from the pqueues. 14510Sstevel@tonic-gate */ 14520Sstevel@tonic-gate if (!tpfinished) { 14530Sstevel@tonic-gate goto done; 14540Sstevel@tonic-gate } 14550Sstevel@tonic-gate 14560Sstevel@tonic-gate instr->nextseq = ssn + 1; 14570Sstevel@tonic-gate /* Deliver any successive data chunks in the instr queue */ 14580Sstevel@tonic-gate while (instr->istr_nmsgs > 0) { 14590Sstevel@tonic-gate dmp = (mblk_t *)instr->istr_msgs; 14600Sstevel@tonic-gate dc = (sctp_data_hdr_t *)dmp->b_rptr; 14610Sstevel@tonic-gate ssn = ntohs(dc->sdh_ssn); 14620Sstevel@tonic-gate /* Gap in the sequence */ 14630Sstevel@tonic-gate if (ssn != instr->nextseq) 14640Sstevel@tonic-gate break; 14650Sstevel@tonic-gate 14660Sstevel@tonic-gate /* Else deliver the data */ 14670Sstevel@tonic-gate (instr->istr_nmsgs)--; 14680Sstevel@tonic-gate (instr->nextseq)++; 14690Sstevel@tonic-gate (sctp->sctp_istr_nmsgs)--; 14700Sstevel@tonic-gate 14710Sstevel@tonic-gate instr->istr_msgs = instr->istr_msgs->b_next; 14720Sstevel@tonic-gate if (instr->istr_msgs != NULL) 14730Sstevel@tonic-gate instr->istr_msgs->b_prev = NULL; 14740Sstevel@tonic-gate dmp->b_next = dmp->b_prev = NULL; 14750Sstevel@tonic-gate 14760Sstevel@tonic-gate dprint(2, ("data_chunk: pulling %x from pq (ssn %d)\n", 14770Sstevel@tonic-gate ntohl(dc->sdh_tsn), (int)ssn)); 14780Sstevel@tonic-gate 14790Sstevel@tonic-gate /* 14800Sstevel@tonic-gate * If this chunk was reassembled, each b_cont represents 14810Sstevel@tonic-gate * another TSN; advance ftsn now. 14820Sstevel@tonic-gate */ 14830Sstevel@tonic-gate dlen = dmp->b_wptr - dmp->b_rptr - sizeof (*dc); 14840Sstevel@tonic-gate for (pmp = dmp->b_cont; pmp; pmp = pmp->b_cont) 14850Sstevel@tonic-gate dlen += pmp->b_wptr - pmp->b_rptr; 14860Sstevel@tonic-gate 14870Sstevel@tonic-gate ASSERT(sctp->sctp_rxqueued >= dlen); 14880Sstevel@tonic-gate ASSERT(sctp->sctp_rwnd >= dlen); 14890Sstevel@tonic-gate 14900Sstevel@tonic-gate sctp->sctp_rxqueued -= dlen; 14910Sstevel@tonic-gate if (can_deliver) { 14920Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)(dc + 1); 14930Sstevel@tonic-gate if (sctp_input_add_ancillary(sctp, &dmp, dc, fp, 14940Sstevel@tonic-gate ipp) == 0) { 14950Sstevel@tonic-gate dprint(1, ("sctp_data_chunk: delivering %lu " 14960Sstevel@tonic-gate "bytes\n", msgdsize(dmp))); 14970Sstevel@tonic-gate sctp->sctp_rwnd -= dlen; 14980Sstevel@tonic-gate new_rwnd = sctp->sctp_ulp_recv(sctp->sctp_ulpd, 14990Sstevel@tonic-gate dmp, tpfinished ? 0 : SCTP_PARTIAL_DATA); 15000Sstevel@tonic-gate if (new_rwnd > sctp->sctp_rwnd) { 15010Sstevel@tonic-gate sctp->sctp_rwnd = new_rwnd; 15020Sstevel@tonic-gate } 15030Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 15040Sstevel@tonic-gate } else { 15050Sstevel@tonic-gate freemsg(dmp); 15060Sstevel@tonic-gate return; 15070Sstevel@tonic-gate } 15080Sstevel@tonic-gate } else { 15090Sstevel@tonic-gate /* About to free the data */ 15100Sstevel@tonic-gate freemsg(dmp); 15110Sstevel@tonic-gate SCTP_ACK_IT(sctp, tsn); 15120Sstevel@tonic-gate } 15130Sstevel@tonic-gate } 15140Sstevel@tonic-gate 15150Sstevel@tonic-gate done: 15160Sstevel@tonic-gate 15170Sstevel@tonic-gate /* 15180Sstevel@tonic-gate * If there are gap reports pending, check if advancing 15190Sstevel@tonic-gate * the ftsn here closes a gap. If so, we can advance 15200Sstevel@tonic-gate * ftsn to the end of the set. 15210Sstevel@tonic-gate */ 15220Sstevel@tonic-gate if (sctp->sctp_sack_info != NULL && 15230Sstevel@tonic-gate sctp->sctp_ftsn == sctp->sctp_sack_info->begin) { 15240Sstevel@tonic-gate sctp->sctp_ftsn = sctp->sctp_sack_info->end + 1; 15250Sstevel@tonic-gate } 15260Sstevel@tonic-gate /* 15270Sstevel@tonic-gate * If ftsn has moved forward, maybe we can remove gap reports. 15280Sstevel@tonic-gate * NB: dmp may now be NULL, so don't dereference it here. 15290Sstevel@tonic-gate */ 15300Sstevel@tonic-gate if (oftsn != sctp->sctp_ftsn && sctp->sctp_sack_info != NULL) { 15310Sstevel@tonic-gate sctp_ack_rem(&sctp->sctp_sack_info, sctp->sctp_ftsn - 1, 15320Sstevel@tonic-gate &sctp->sctp_sack_gaps); 15330Sstevel@tonic-gate dprint(2, ("data_chunk: removed acks before %x (num=%d)\n", 15340Sstevel@tonic-gate sctp->sctp_ftsn - 1, sctp->sctp_sack_gaps)); 15350Sstevel@tonic-gate } 15360Sstevel@tonic-gate 15370Sstevel@tonic-gate #ifdef DEBUG 15380Sstevel@tonic-gate if (sctp->sctp_sack_info != NULL) { 15390Sstevel@tonic-gate ASSERT(sctp->sctp_ftsn != sctp->sctp_sack_info->begin); 15400Sstevel@tonic-gate } 15410Sstevel@tonic-gate #endif 15420Sstevel@tonic-gate 15430Sstevel@tonic-gate #undef SCTP_ACK_IT 15440Sstevel@tonic-gate } 15450Sstevel@tonic-gate 15460Sstevel@tonic-gate void 15470Sstevel@tonic-gate sctp_fill_sack(sctp_t *sctp, unsigned char *dst, int sacklen) 15480Sstevel@tonic-gate { 15490Sstevel@tonic-gate sctp_chunk_hdr_t *sch; 15500Sstevel@tonic-gate sctp_sack_chunk_t *sc; 15510Sstevel@tonic-gate sctp_sack_frag_t *sf; 15520Sstevel@tonic-gate uint16_t num_gaps = sctp->sctp_sack_gaps; 15530Sstevel@tonic-gate sctp_set_t *sp; 15540Sstevel@tonic-gate 15550Sstevel@tonic-gate /* Chunk hdr */ 15560Sstevel@tonic-gate sch = (sctp_chunk_hdr_t *)dst; 15570Sstevel@tonic-gate sch->sch_id = CHUNK_SACK; 15580Sstevel@tonic-gate sch->sch_flags = 0; 15590Sstevel@tonic-gate sch->sch_len = htons(sacklen); 15600Sstevel@tonic-gate 15610Sstevel@tonic-gate /* SACK chunk */ 15620Sstevel@tonic-gate sctp->sctp_lastacked = sctp->sctp_ftsn - 1; 15630Sstevel@tonic-gate 15640Sstevel@tonic-gate sc = (sctp_sack_chunk_t *)(sch + 1); 15650Sstevel@tonic-gate sc->ssc_cumtsn = htonl(sctp->sctp_lastacked); 15660Sstevel@tonic-gate if (sctp->sctp_rxqueued < sctp->sctp_rwnd) { 15670Sstevel@tonic-gate sc->ssc_a_rwnd = htonl(sctp->sctp_rwnd - sctp->sctp_rxqueued); 15680Sstevel@tonic-gate } else { 15690Sstevel@tonic-gate sc->ssc_a_rwnd = 0; 15700Sstevel@tonic-gate } 15710Sstevel@tonic-gate sc->ssc_numfrags = htons(num_gaps); 15720Sstevel@tonic-gate sc->ssc_numdups = 0; 15730Sstevel@tonic-gate 15740Sstevel@tonic-gate /* lay in gap reports */ 15750Sstevel@tonic-gate sf = (sctp_sack_frag_t *)(sc + 1); 15760Sstevel@tonic-gate for (sp = sctp->sctp_sack_info; sp; sp = sp->next) { 15770Sstevel@tonic-gate uint16_t offset; 15780Sstevel@tonic-gate 15790Sstevel@tonic-gate /* start */ 15800Sstevel@tonic-gate if (sp->begin > sctp->sctp_lastacked) { 15810Sstevel@tonic-gate offset = (uint16_t)(sp->begin - sctp->sctp_lastacked); 15820Sstevel@tonic-gate } else { 15830Sstevel@tonic-gate /* sequence number wrap */ 15840Sstevel@tonic-gate offset = (uint16_t)(UINT32_MAX - sctp->sctp_lastacked + 15850Sstevel@tonic-gate sp->begin); 15860Sstevel@tonic-gate } 15870Sstevel@tonic-gate sf->ssf_start = htons(offset); 15880Sstevel@tonic-gate 15890Sstevel@tonic-gate /* end */ 15900Sstevel@tonic-gate if (sp->end >= sp->begin) { 15910Sstevel@tonic-gate offset += (uint16_t)(sp->end - sp->begin); 15920Sstevel@tonic-gate } else { 15930Sstevel@tonic-gate /* sequence number wrap */ 15940Sstevel@tonic-gate offset += (uint16_t)(UINT32_MAX - sp->begin + sp->end); 15950Sstevel@tonic-gate } 15960Sstevel@tonic-gate sf->ssf_end = htons(offset); 15970Sstevel@tonic-gate 15980Sstevel@tonic-gate sf++; 15990Sstevel@tonic-gate /* This is just for debugging (a la the following assertion) */ 16000Sstevel@tonic-gate num_gaps--; 16010Sstevel@tonic-gate } 16020Sstevel@tonic-gate 16030Sstevel@tonic-gate ASSERT(num_gaps == 0); 16040Sstevel@tonic-gate 16050Sstevel@tonic-gate /* If the SACK timer is running, stop it */ 16060Sstevel@tonic-gate if (sctp->sctp_ack_timer_running) { 16070Sstevel@tonic-gate sctp_timer_stop(sctp->sctp_ack_mp); 16080Sstevel@tonic-gate sctp->sctp_ack_timer_running = B_FALSE; 16090Sstevel@tonic-gate } 16100Sstevel@tonic-gate 16110Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_obchunks); 16120Sstevel@tonic-gate } 16130Sstevel@tonic-gate 16140Sstevel@tonic-gate mblk_t * 16150Sstevel@tonic-gate sctp_make_sack(sctp_t *sctp, sctp_faddr_t *sendto, mblk_t *dups) 16160Sstevel@tonic-gate { 16170Sstevel@tonic-gate mblk_t *smp; 16180Sstevel@tonic-gate size_t slen; 16190Sstevel@tonic-gate sctp_chunk_hdr_t *sch; 16200Sstevel@tonic-gate sctp_sack_chunk_t *sc; 16210Sstevel@tonic-gate 16220Sstevel@tonic-gate if (sctp->sctp_force_sack) { 16230Sstevel@tonic-gate sctp->sctp_force_sack = 0; 16240Sstevel@tonic-gate goto checks_done; 16250Sstevel@tonic-gate } 16260Sstevel@tonic-gate 16270Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_ESTABLISHED) { 16280Sstevel@tonic-gate if (sctp->sctp_sack_toggle < 2) { 16290Sstevel@tonic-gate /* no need to SACK right now */ 16300Sstevel@tonic-gate dprint(2, ("sctp_make_sack: %p no sack (toggle)\n", 1631*1676Sjpk (void *)sctp)); 16320Sstevel@tonic-gate return (NULL); 16330Sstevel@tonic-gate } else if (sctp->sctp_sack_toggle >= 2) { 16340Sstevel@tonic-gate sctp->sctp_sack_toggle = 0; 16350Sstevel@tonic-gate } 16360Sstevel@tonic-gate } 16370Sstevel@tonic-gate 16380Sstevel@tonic-gate if (sctp->sctp_ftsn == sctp->sctp_lastacked + 1) { 1639*1676Sjpk dprint(2, ("sctp_make_sack: %p no sack (already)\n", 1640*1676Sjpk (void *)sctp)); 16410Sstevel@tonic-gate return (NULL); 16420Sstevel@tonic-gate } 16430Sstevel@tonic-gate 16440Sstevel@tonic-gate checks_done: 16450Sstevel@tonic-gate dprint(2, ("sctp_make_sack: acking %x\n", sctp->sctp_ftsn - 1)); 16460Sstevel@tonic-gate 16470Sstevel@tonic-gate slen = sizeof (*sch) + sizeof (*sc) + 16480Sstevel@tonic-gate (sizeof (sctp_sack_frag_t) * sctp->sctp_sack_gaps); 16490Sstevel@tonic-gate smp = sctp_make_mp(sctp, sendto, slen); 16500Sstevel@tonic-gate if (smp == NULL) { 16510Sstevel@tonic-gate return (NULL); 16520Sstevel@tonic-gate } 16530Sstevel@tonic-gate sch = (sctp_chunk_hdr_t *)smp->b_wptr; 16540Sstevel@tonic-gate 16550Sstevel@tonic-gate sctp_fill_sack(sctp, smp->b_wptr, slen); 16560Sstevel@tonic-gate smp->b_wptr += slen; 16570Sstevel@tonic-gate if (dups) { 16580Sstevel@tonic-gate sc = (sctp_sack_chunk_t *)(sch + 1); 16590Sstevel@tonic-gate sc->ssc_numdups = htons((dups->b_wptr - dups->b_rptr) 16600Sstevel@tonic-gate / sizeof (uint32_t)); 16610Sstevel@tonic-gate sch->sch_len = htons(slen + (dups->b_wptr - dups->b_rptr)); 16620Sstevel@tonic-gate smp->b_cont = dups; 16630Sstevel@tonic-gate } 16640Sstevel@tonic-gate 16650Sstevel@tonic-gate return (smp); 16660Sstevel@tonic-gate } 16670Sstevel@tonic-gate 16680Sstevel@tonic-gate void 16690Sstevel@tonic-gate sctp_sack(sctp_t *sctp, mblk_t *dups) 16700Sstevel@tonic-gate { 16710Sstevel@tonic-gate mblk_t *smp; 16720Sstevel@tonic-gate 16730Sstevel@tonic-gate /* If we are shutting down, let send_shutdown() bundle the SACK */ 16740Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_SENT) { 16750Sstevel@tonic-gate sctp_send_shutdown(sctp, 0); 16760Sstevel@tonic-gate } 16770Sstevel@tonic-gate 16780Sstevel@tonic-gate ASSERT(sctp->sctp_lastdata != NULL); 16790Sstevel@tonic-gate 16800Sstevel@tonic-gate if ((smp = sctp_make_sack(sctp, sctp->sctp_lastdata, dups)) == NULL) { 16810Sstevel@tonic-gate /* The caller of sctp_sack() will not free the dups mblk. */ 16820Sstevel@tonic-gate if (dups != NULL) 16830Sstevel@tonic-gate freeb(dups); 16840Sstevel@tonic-gate return; 16850Sstevel@tonic-gate } 16860Sstevel@tonic-gate 16870Sstevel@tonic-gate sctp_set_iplen(sctp, smp); 16880Sstevel@tonic-gate 16890Sstevel@tonic-gate dprint(2, ("sctp_sack: sending to %p %x:%x:%x:%x\n", 1690*1676Sjpk (void *)sctp->sctp_lastdata, 1691*1676Sjpk SCTP_PRINTADDR(sctp->sctp_lastdata->faddr))); 16920Sstevel@tonic-gate 16930Sstevel@tonic-gate sctp->sctp_active = lbolt64; 16940Sstevel@tonic-gate 16950Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpOutAck); 16960Sstevel@tonic-gate sctp_add_sendq(sctp, smp); 16970Sstevel@tonic-gate } 16980Sstevel@tonic-gate 16990Sstevel@tonic-gate /* 17000Sstevel@tonic-gate * This is called if we have a message that was partially sent and is 17010Sstevel@tonic-gate * abandoned. The cum TSN will be the last chunk sent for this message, 17020Sstevel@tonic-gate * subsequent chunks will be marked ABANDONED. We send a Forward TSN 17030Sstevel@tonic-gate * chunk in this case with the TSN of the last sent chunk so that the 17040Sstevel@tonic-gate * peer can clean up its fragment list for this message. This message 17050Sstevel@tonic-gate * will be removed from the transmit list when the peer sends a SACK 17060Sstevel@tonic-gate * back. 17070Sstevel@tonic-gate */ 17080Sstevel@tonic-gate int 17090Sstevel@tonic-gate sctp_check_abandoned_msg(sctp_t *sctp, mblk_t *meta) 17100Sstevel@tonic-gate { 17110Sstevel@tonic-gate sctp_data_hdr_t *dh; 17120Sstevel@tonic-gate mblk_t *nmp; 17130Sstevel@tonic-gate mblk_t *head; 17140Sstevel@tonic-gate int32_t unsent = 0; 17150Sstevel@tonic-gate mblk_t *mp1 = meta->b_cont; 17160Sstevel@tonic-gate uint32_t adv_pap = sctp->sctp_adv_pap; 17170Sstevel@tonic-gate sctp_faddr_t *fp = sctp->sctp_current; 17180Sstevel@tonic-gate 17190Sstevel@tonic-gate dh = (sctp_data_hdr_t *)mp1->b_rptr; 17200Sstevel@tonic-gate if (SEQ_GEQ(sctp->sctp_lastack_rxd, ntohl(dh->sdh_tsn))) { 17210Sstevel@tonic-gate sctp_ftsn_set_t *sets = NULL; 17220Sstevel@tonic-gate uint_t nsets = 0; 17230Sstevel@tonic-gate uint32_t seglen = sizeof (uint32_t); 17240Sstevel@tonic-gate boolean_t ubit = SCTP_DATA_GET_UBIT(dh); 17250Sstevel@tonic-gate 17260Sstevel@tonic-gate while (mp1->b_next != NULL && SCTP_CHUNK_ISSENT(mp1->b_next)) 17270Sstevel@tonic-gate mp1 = mp1->b_next; 17280Sstevel@tonic-gate dh = (sctp_data_hdr_t *)mp1->b_rptr; 17290Sstevel@tonic-gate sctp->sctp_adv_pap = ntohl(dh->sdh_tsn); 17300Sstevel@tonic-gate if (!ubit && 17310Sstevel@tonic-gate !sctp_add_ftsn_set(&sets, fp, meta, &nsets, &seglen)) { 17320Sstevel@tonic-gate sctp->sctp_adv_pap = adv_pap; 17330Sstevel@tonic-gate return (ENOMEM); 17340Sstevel@tonic-gate } 17350Sstevel@tonic-gate nmp = sctp_make_ftsn_chunk(sctp, fp, sets, nsets, seglen); 17360Sstevel@tonic-gate sctp_free_ftsn_set(sets); 17370Sstevel@tonic-gate if (nmp == NULL) { 17380Sstevel@tonic-gate sctp->sctp_adv_pap = adv_pap; 17390Sstevel@tonic-gate return (ENOMEM); 17400Sstevel@tonic-gate } 1741252Svi117747 head = sctp_add_proto_hdr(sctp, fp, nmp, 0, NULL); 17420Sstevel@tonic-gate if (head == NULL) { 17430Sstevel@tonic-gate sctp->sctp_adv_pap = adv_pap; 17440Sstevel@tonic-gate freemsg(nmp); 17450Sstevel@tonic-gate return (ENOMEM); 17460Sstevel@tonic-gate } 17470Sstevel@tonic-gate SCTP_MSG_SET_ABANDONED(meta); 17480Sstevel@tonic-gate sctp_set_iplen(sctp, head); 17490Sstevel@tonic-gate sctp_add_sendq(sctp, head); 17500Sstevel@tonic-gate if (!fp->timer_running) 17510Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, fp->rto); 17520Sstevel@tonic-gate mp1 = mp1->b_next; 17530Sstevel@tonic-gate while (mp1 != NULL) { 17540Sstevel@tonic-gate ASSERT(!SCTP_CHUNK_ISSENT(mp1)); 17550Sstevel@tonic-gate ASSERT(!SCTP_CHUNK_ABANDONED(mp1)); 17560Sstevel@tonic-gate SCTP_ABANDON_CHUNK(mp1); 17570Sstevel@tonic-gate dh = (sctp_data_hdr_t *)mp1->b_rptr; 17580Sstevel@tonic-gate unsent += ntohs(dh->sdh_len) - sizeof (*dh); 17590Sstevel@tonic-gate mp1 = mp1->b_next; 17600Sstevel@tonic-gate } 17610Sstevel@tonic-gate ASSERT(sctp->sctp_unsent >= unsent); 17620Sstevel@tonic-gate sctp->sctp_unsent -= unsent; 17630Sstevel@tonic-gate /* 17640Sstevel@tonic-gate * Update ULP the amount of queued data, which is 17650Sstevel@tonic-gate * sent-unack'ed + unsent. 17660Sstevel@tonic-gate */ 17670Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) { 17680Sstevel@tonic-gate sctp->sctp_ulp_xmitted(sctp->sctp_ulpd, 17690Sstevel@tonic-gate sctp->sctp_unacked + sctp->sctp_unsent); 17700Sstevel@tonic-gate } 17710Sstevel@tonic-gate return (0); 17720Sstevel@tonic-gate } 17730Sstevel@tonic-gate return (-1); 17740Sstevel@tonic-gate } 17750Sstevel@tonic-gate 17760Sstevel@tonic-gate uint32_t 17770Sstevel@tonic-gate sctp_cumack(sctp_t *sctp, uint32_t tsn, mblk_t **first_unacked) 17780Sstevel@tonic-gate { 17790Sstevel@tonic-gate mblk_t *ump, *nump, *mp = NULL; 17800Sstevel@tonic-gate uint16_t chunklen; 17810Sstevel@tonic-gate uint32_t xtsn; 17820Sstevel@tonic-gate sctp_faddr_t *fp; 17830Sstevel@tonic-gate sctp_data_hdr_t *sdc; 17840Sstevel@tonic-gate uint32_t cumack_forward = 0; 17850Sstevel@tonic-gate sctp_msg_hdr_t *mhdr; 17860Sstevel@tonic-gate 17870Sstevel@tonic-gate ump = sctp->sctp_xmit_head; 17880Sstevel@tonic-gate 17890Sstevel@tonic-gate /* 17900Sstevel@tonic-gate * Free messages only when they're completely acked. 17910Sstevel@tonic-gate */ 17920Sstevel@tonic-gate while (ump != NULL) { 17930Sstevel@tonic-gate mhdr = (sctp_msg_hdr_t *)ump->b_rptr; 17940Sstevel@tonic-gate for (mp = ump->b_cont; mp != NULL; mp = mp->b_next) { 17950Sstevel@tonic-gate if (SCTP_CHUNK_ABANDONED(mp)) { 17960Sstevel@tonic-gate ASSERT(SCTP_IS_MSG_ABANDONED(ump)); 17970Sstevel@tonic-gate mp = NULL; 17980Sstevel@tonic-gate break; 17990Sstevel@tonic-gate } 18000Sstevel@tonic-gate /* 18010Sstevel@tonic-gate * We check for abandoned message if we are PR-SCTP 18020Sstevel@tonic-gate * aware, if this is not the first chunk in the 18030Sstevel@tonic-gate * message (b_cont) and if the message is marked 18040Sstevel@tonic-gate * abandoned. 18050Sstevel@tonic-gate */ 18060Sstevel@tonic-gate if (!SCTP_CHUNK_ISSENT(mp)) { 18070Sstevel@tonic-gate if (sctp->sctp_prsctp_aware && 18080Sstevel@tonic-gate mp != ump->b_cont && 18090Sstevel@tonic-gate (SCTP_IS_MSG_ABANDONED(ump) || 18100Sstevel@tonic-gate SCTP_MSG_TO_BE_ABANDONED(ump, mhdr, 18110Sstevel@tonic-gate sctp))) { 18120Sstevel@tonic-gate (void) sctp_check_abandoned_msg(sctp, 18130Sstevel@tonic-gate ump); 18140Sstevel@tonic-gate } 18150Sstevel@tonic-gate goto cum_ack_done; 18160Sstevel@tonic-gate } 18170Sstevel@tonic-gate sdc = (sctp_data_hdr_t *)mp->b_rptr; 18180Sstevel@tonic-gate xtsn = ntohl(sdc->sdh_tsn); 18190Sstevel@tonic-gate if (SEQ_GEQ(sctp->sctp_lastack_rxd, xtsn)) 18200Sstevel@tonic-gate continue; 18210Sstevel@tonic-gate if (SEQ_GEQ(tsn, xtsn)) { 18220Sstevel@tonic-gate fp = SCTP_CHUNK_DEST(mp); 18230Sstevel@tonic-gate chunklen = ntohs(sdc->sdh_len); 18240Sstevel@tonic-gate 18250Sstevel@tonic-gate if (sctp->sctp_out_time != 0 && 18260Sstevel@tonic-gate xtsn == sctp->sctp_rtt_tsn) { 18270Sstevel@tonic-gate /* Got a new RTT measurement */ 18280Sstevel@tonic-gate sctp_update_rtt(sctp, fp, 18290Sstevel@tonic-gate lbolt64 - sctp->sctp_out_time); 18300Sstevel@tonic-gate sctp->sctp_out_time = 0; 18310Sstevel@tonic-gate } 18320Sstevel@tonic-gate if (SCTP_CHUNK_ISACKED(mp)) 18330Sstevel@tonic-gate continue; 18340Sstevel@tonic-gate SCTP_CHUNK_ACKED(mp); 18350Sstevel@tonic-gate ASSERT(fp->suna >= chunklen); 18360Sstevel@tonic-gate fp->suna -= chunklen; 18370Sstevel@tonic-gate fp->acked += chunklen; 18380Sstevel@tonic-gate cumack_forward += chunklen; 18390Sstevel@tonic-gate ASSERT(sctp->sctp_unacked >= 18400Sstevel@tonic-gate (chunklen - sizeof (*sdc))); 18410Sstevel@tonic-gate sctp->sctp_unacked -= 18420Sstevel@tonic-gate (chunklen - sizeof (*sdc)); 18430Sstevel@tonic-gate if (fp->suna == 0) { 18440Sstevel@tonic-gate /* all outstanding data acked */ 18450Sstevel@tonic-gate fp->pba = 0; 18460Sstevel@tonic-gate SCTP_FADDR_TIMER_STOP(fp); 18470Sstevel@tonic-gate } else { 18480Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, 18490Sstevel@tonic-gate fp->rto); 18500Sstevel@tonic-gate } 18510Sstevel@tonic-gate } else { 18520Sstevel@tonic-gate goto cum_ack_done; 18530Sstevel@tonic-gate } 18540Sstevel@tonic-gate } 18550Sstevel@tonic-gate nump = ump->b_next; 18560Sstevel@tonic-gate if (nump != NULL) 18570Sstevel@tonic-gate nump->b_prev = NULL; 18580Sstevel@tonic-gate if (ump == sctp->sctp_xmit_tail) 18590Sstevel@tonic-gate sctp->sctp_xmit_tail = nump; 18600Sstevel@tonic-gate if (SCTP_IS_MSG_ABANDONED(ump)) { 18610Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_prsctpdrop); 18620Sstevel@tonic-gate ump->b_next = NULL; 18630Sstevel@tonic-gate sctp_sendfail_event(sctp, ump, 0, B_TRUE); 18640Sstevel@tonic-gate } else { 18650Sstevel@tonic-gate sctp_free_msg(ump); 18660Sstevel@tonic-gate } 18670Sstevel@tonic-gate sctp->sctp_xmit_head = ump = nump; 18680Sstevel@tonic-gate } 18690Sstevel@tonic-gate cum_ack_done: 18700Sstevel@tonic-gate *first_unacked = mp; 18710Sstevel@tonic-gate if (cumack_forward > 0) { 18720Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInAck); 18730Sstevel@tonic-gate if (SEQ_GT(sctp->sctp_lastack_rxd, sctp->sctp_recovery_tsn)) { 18740Sstevel@tonic-gate sctp->sctp_recovery_tsn = sctp->sctp_lastack_rxd; 18750Sstevel@tonic-gate } 18760Sstevel@tonic-gate 18770Sstevel@tonic-gate /* 18780Sstevel@tonic-gate * Update ULP the amount of queued data, which is 18790Sstevel@tonic-gate * sent-unack'ed + unsent. 18800Sstevel@tonic-gate */ 18810Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) { 18820Sstevel@tonic-gate sctp->sctp_ulp_xmitted(sctp->sctp_ulpd, 18830Sstevel@tonic-gate sctp->sctp_unacked + sctp->sctp_unsent); 18840Sstevel@tonic-gate } 18850Sstevel@tonic-gate 18860Sstevel@tonic-gate /* Time to send a shutdown? */ 18870Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_PENDING) { 18880Sstevel@tonic-gate sctp_send_shutdown(sctp, 0); 18890Sstevel@tonic-gate } 18900Sstevel@tonic-gate sctp->sctp_xmit_unacked = mp; 18910Sstevel@tonic-gate } else { 18920Sstevel@tonic-gate /* dup ack */ 18930Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInDupAck); 18940Sstevel@tonic-gate } 18950Sstevel@tonic-gate sctp->sctp_lastack_rxd = tsn; 18960Sstevel@tonic-gate if (SEQ_LT(sctp->sctp_adv_pap, sctp->sctp_lastack_rxd)) 18970Sstevel@tonic-gate sctp->sctp_adv_pap = sctp->sctp_lastack_rxd; 18980Sstevel@tonic-gate ASSERT(sctp->sctp_xmit_head || sctp->sctp_unacked == 0); 18990Sstevel@tonic-gate 19000Sstevel@tonic-gate return (cumack_forward); 19010Sstevel@tonic-gate } 19020Sstevel@tonic-gate 19030Sstevel@tonic-gate static int 19040Sstevel@tonic-gate sctp_set_frwnd(sctp_t *sctp, uint32_t frwnd) 19050Sstevel@tonic-gate { 19060Sstevel@tonic-gate uint32_t orwnd; 19070Sstevel@tonic-gate 19080Sstevel@tonic-gate if (sctp->sctp_unacked > frwnd) { 19090Sstevel@tonic-gate sctp->sctp_frwnd = 0; 19100Sstevel@tonic-gate return (0); 19110Sstevel@tonic-gate } 19120Sstevel@tonic-gate orwnd = sctp->sctp_frwnd; 19130Sstevel@tonic-gate sctp->sctp_frwnd = frwnd - sctp->sctp_unacked; 19140Sstevel@tonic-gate if (orwnd < sctp->sctp_frwnd) { 19150Sstevel@tonic-gate return (1); 19160Sstevel@tonic-gate } else { 19170Sstevel@tonic-gate return (0); 19180Sstevel@tonic-gate } 19190Sstevel@tonic-gate } 19200Sstevel@tonic-gate 19210Sstevel@tonic-gate /* 19220Sstevel@tonic-gate * For un-ordered messages. 19230Sstevel@tonic-gate * Walk the sctp->sctp_uo_frag list and remove any fragments with TSN 19240Sstevel@tonic-gate * less than/equal to ftsn. Fragments for un-ordered messages are 19250Sstevel@tonic-gate * strictly in sequence (w.r.t TSN). 19260Sstevel@tonic-gate */ 19270Sstevel@tonic-gate static int 19280Sstevel@tonic-gate sctp_ftsn_check_uo_frag(sctp_t *sctp, uint32_t ftsn) 19290Sstevel@tonic-gate { 19300Sstevel@tonic-gate mblk_t *hmp; 19310Sstevel@tonic-gate mblk_t *hmp_next; 19320Sstevel@tonic-gate sctp_data_hdr_t *dc; 19330Sstevel@tonic-gate int dlen = 0; 19340Sstevel@tonic-gate 19350Sstevel@tonic-gate hmp = sctp->sctp_uo_frags; 19360Sstevel@tonic-gate while (hmp != NULL) { 19370Sstevel@tonic-gate hmp_next = hmp->b_next; 19380Sstevel@tonic-gate dc = (sctp_data_hdr_t *)hmp->b_rptr; 19390Sstevel@tonic-gate if (SEQ_GT(ntohl(dc->sdh_tsn), ftsn)) 19400Sstevel@tonic-gate return (dlen); 19410Sstevel@tonic-gate sctp->sctp_uo_frags = hmp_next; 19420Sstevel@tonic-gate if (hmp_next != NULL) 19430Sstevel@tonic-gate hmp_next->b_prev = NULL; 19440Sstevel@tonic-gate hmp->b_next = NULL; 19450Sstevel@tonic-gate dlen += ntohs(dc->sdh_len) - sizeof (*dc); 19460Sstevel@tonic-gate freeb(hmp); 19470Sstevel@tonic-gate hmp = hmp_next; 19480Sstevel@tonic-gate } 19490Sstevel@tonic-gate return (dlen); 19500Sstevel@tonic-gate } 19510Sstevel@tonic-gate 19520Sstevel@tonic-gate /* 19530Sstevel@tonic-gate * For ordered messages. 19540Sstevel@tonic-gate * Check for existing fragments for an sid-ssn pair reported as abandoned, 19550Sstevel@tonic-gate * hence will not receive, in the Forward TSN. If there are fragments, then 19560Sstevel@tonic-gate * we just nuke them. If and when Partial Delivery API is supported, we 19570Sstevel@tonic-gate * would need to send a notification to the upper layer about this. 19580Sstevel@tonic-gate */ 19590Sstevel@tonic-gate static int 19600Sstevel@tonic-gate sctp_ftsn_check_frag(sctp_t *sctp, uint16_t ssn, sctp_instr_t *sip) 19610Sstevel@tonic-gate { 19620Sstevel@tonic-gate sctp_reass_t *srp; 19630Sstevel@tonic-gate mblk_t *hmp; 19640Sstevel@tonic-gate mblk_t *dmp; 19650Sstevel@tonic-gate mblk_t *hmp_next; 19660Sstevel@tonic-gate sctp_data_hdr_t *dc; 19670Sstevel@tonic-gate int dlen = 0; 19680Sstevel@tonic-gate 19690Sstevel@tonic-gate hmp = sip->istr_reass; 19700Sstevel@tonic-gate while (hmp != NULL) { 19710Sstevel@tonic-gate hmp_next = hmp->b_next; 19720Sstevel@tonic-gate srp = (sctp_reass_t *)DB_BASE(hmp); 19730Sstevel@tonic-gate if (SSN_GT(srp->ssn, ssn)) 19740Sstevel@tonic-gate return (dlen); 19750Sstevel@tonic-gate /* 19760Sstevel@tonic-gate * If we had sent part of this message up, send a partial 19770Sstevel@tonic-gate * delivery event. Since this is ordered delivery, we should 19780Sstevel@tonic-gate * have sent partial message only for the next in sequence, 19790Sstevel@tonic-gate * hence the ASSERT. See comments in sctp_data_chunk() for 19800Sstevel@tonic-gate * trypartial. 19810Sstevel@tonic-gate */ 19820Sstevel@tonic-gate if (srp->partial_delivered) { 19830Sstevel@tonic-gate ASSERT(sip->nextseq == srp->ssn); 19840Sstevel@tonic-gate sctp_partial_delivery_event(sctp); 19850Sstevel@tonic-gate } 19860Sstevel@tonic-gate /* Take it out of the reass queue */ 19870Sstevel@tonic-gate sip->istr_reass = hmp_next; 19880Sstevel@tonic-gate if (hmp_next != NULL) 19890Sstevel@tonic-gate hmp_next->b_prev = NULL; 19900Sstevel@tonic-gate hmp->b_next = NULL; 19910Sstevel@tonic-gate ASSERT(hmp->b_prev == NULL); 19920Sstevel@tonic-gate dmp = hmp; 19930Sstevel@tonic-gate if (DB_TYPE(hmp) == M_CTL) { 19940Sstevel@tonic-gate dmp = hmp->b_cont; 19950Sstevel@tonic-gate hmp->b_cont = NULL; 19960Sstevel@tonic-gate freeb(hmp); 19970Sstevel@tonic-gate hmp = dmp; 19980Sstevel@tonic-gate } 19990Sstevel@tonic-gate while (dmp != NULL) { 20000Sstevel@tonic-gate dc = (sctp_data_hdr_t *)dmp->b_rptr; 20010Sstevel@tonic-gate dlen += ntohs(dc->sdh_len) - sizeof (*dc); 20020Sstevel@tonic-gate dmp = dmp->b_cont; 20030Sstevel@tonic-gate } 20040Sstevel@tonic-gate freemsg(hmp); 20050Sstevel@tonic-gate hmp = hmp_next; 20060Sstevel@tonic-gate } 20070Sstevel@tonic-gate return (dlen); 20080Sstevel@tonic-gate } 20090Sstevel@tonic-gate 20100Sstevel@tonic-gate /* 20110Sstevel@tonic-gate * Update sctp_ftsn to the cumulative TSN from the Forward TSN chunk. Remove 20120Sstevel@tonic-gate * any SACK gaps less than the newly updated sctp_ftsn. Walk through the 20130Sstevel@tonic-gate * sid-ssn pair in the Forward TSN and for each, clean the fragment list 20140Sstevel@tonic-gate * for this pair, if needed, and check if we can deliver subsequent 20150Sstevel@tonic-gate * messages, if any, from the instream queue (that were waiting for this 20160Sstevel@tonic-gate * sid-ssn message to show up). Once we are done try to update the SACK 20170Sstevel@tonic-gate * info. We could get a duplicate Forward TSN, in which case just send 20180Sstevel@tonic-gate * a SACK. If any of the sid values in the the Forward TSN is invalid, 20190Sstevel@tonic-gate * send back an "Invalid Stream Identifier" error and continue processing 20200Sstevel@tonic-gate * the rest. 20210Sstevel@tonic-gate */ 20220Sstevel@tonic-gate static void 20230Sstevel@tonic-gate sctp_process_forward_tsn(sctp_t *sctp, sctp_chunk_hdr_t *ch, sctp_faddr_t *fp, 20240Sstevel@tonic-gate ip6_pkt_t *ipp) 20250Sstevel@tonic-gate { 20260Sstevel@tonic-gate uint32_t *ftsn = (uint32_t *)(ch + 1); 20270Sstevel@tonic-gate ftsn_entry_t *ftsn_entry; 20280Sstevel@tonic-gate sctp_instr_t *instr; 20290Sstevel@tonic-gate boolean_t can_deliver = B_TRUE; 20300Sstevel@tonic-gate size_t dlen; 20310Sstevel@tonic-gate int flen; 20320Sstevel@tonic-gate mblk_t *dmp; 20330Sstevel@tonic-gate mblk_t *pmp; 20340Sstevel@tonic-gate sctp_data_hdr_t *dc; 20350Sstevel@tonic-gate ssize_t remaining; 20360Sstevel@tonic-gate 20370Sstevel@tonic-gate *ftsn = ntohl(*ftsn); 20380Sstevel@tonic-gate remaining = ntohs(ch->sch_len) - sizeof (*ch) - sizeof (*ftsn); 20390Sstevel@tonic-gate 20400Sstevel@tonic-gate if (SCTP_IS_DETACHED(sctp)) { 20410Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInClosed); 20420Sstevel@tonic-gate can_deliver = B_FALSE; 20430Sstevel@tonic-gate } 20440Sstevel@tonic-gate /* 20450Sstevel@tonic-gate * un-ordered messages don't have SID-SSN pair entries, we check 20460Sstevel@tonic-gate * for any fragments (for un-ordered message) to be discarded using 20470Sstevel@tonic-gate * the cumulative FTSN. 20480Sstevel@tonic-gate */ 20490Sstevel@tonic-gate flen = sctp_ftsn_check_uo_frag(sctp, *ftsn); 20500Sstevel@tonic-gate if (flen > 0) { 20510Sstevel@tonic-gate ASSERT(sctp->sctp_rxqueued >= flen); 20520Sstevel@tonic-gate sctp->sctp_rxqueued -= flen; 20530Sstevel@tonic-gate } 20540Sstevel@tonic-gate ftsn_entry = (ftsn_entry_t *)(ftsn + 1); 20550Sstevel@tonic-gate while (remaining >= sizeof (*ftsn_entry)) { 20560Sstevel@tonic-gate ftsn_entry->ftsn_sid = ntohs(ftsn_entry->ftsn_sid); 20570Sstevel@tonic-gate ftsn_entry->ftsn_ssn = ntohs(ftsn_entry->ftsn_ssn); 20580Sstevel@tonic-gate if (ftsn_entry->ftsn_sid >= sctp->sctp_num_istr) { 20590Sstevel@tonic-gate uint16_t inval_parm[2]; 20600Sstevel@tonic-gate mblk_t *errmp; 20610Sstevel@tonic-gate 20620Sstevel@tonic-gate inval_parm[0] = htons(ftsn_entry->ftsn_sid); 20630Sstevel@tonic-gate /* RESERVED to be ignored at the receiving end */ 20640Sstevel@tonic-gate inval_parm[1] = 0; 20650Sstevel@tonic-gate errmp = sctp_make_err(sctp, SCTP_ERR_BAD_SID, 20660Sstevel@tonic-gate (char *)inval_parm, sizeof (inval_parm)); 20670Sstevel@tonic-gate if (errmp != NULL) 20680Sstevel@tonic-gate sctp_send_err(sctp, errmp, NULL); 20690Sstevel@tonic-gate ftsn_entry++; 20700Sstevel@tonic-gate remaining -= sizeof (*ftsn_entry); 20710Sstevel@tonic-gate continue; 20720Sstevel@tonic-gate } 20730Sstevel@tonic-gate instr = &sctp->sctp_instr[ftsn_entry->ftsn_sid]; 20740Sstevel@tonic-gate flen = sctp_ftsn_check_frag(sctp, ftsn_entry->ftsn_ssn, instr); 20750Sstevel@tonic-gate /* Indicates frags were nuked, update rxqueued */ 20760Sstevel@tonic-gate if (flen > 0) { 20770Sstevel@tonic-gate ASSERT(sctp->sctp_rxqueued >= flen); 20780Sstevel@tonic-gate sctp->sctp_rxqueued -= flen; 20790Sstevel@tonic-gate } 20800Sstevel@tonic-gate /* 20810Sstevel@tonic-gate * It is possible to receive an FTSN chunk with SSN smaller 20820Sstevel@tonic-gate * than then nextseq if this chunk is a retransmission because 20830Sstevel@tonic-gate * of incomplete processing when it was first processed. 20840Sstevel@tonic-gate */ 20850Sstevel@tonic-gate if (SSN_GE(ftsn_entry->ftsn_ssn, instr->nextseq)) 20860Sstevel@tonic-gate instr->nextseq = ftsn_entry->ftsn_ssn + 1; 20870Sstevel@tonic-gate while (instr->istr_nmsgs > 0) { 20880Sstevel@tonic-gate mblk_t *next; 20890Sstevel@tonic-gate 20900Sstevel@tonic-gate dmp = (mblk_t *)instr->istr_msgs; 20910Sstevel@tonic-gate dc = (sctp_data_hdr_t *)dmp->b_rptr; 20920Sstevel@tonic-gate if (ntohs(dc->sdh_ssn) != instr->nextseq) 20930Sstevel@tonic-gate break; 20940Sstevel@tonic-gate 20950Sstevel@tonic-gate next = dmp->b_next; 20960Sstevel@tonic-gate dlen = dmp->b_wptr - dmp->b_rptr - sizeof (*dc); 20970Sstevel@tonic-gate for (pmp = dmp->b_cont; pmp != NULL; 20980Sstevel@tonic-gate pmp = pmp->b_cont) { 20990Sstevel@tonic-gate dlen += pmp->b_wptr - pmp->b_rptr; 21000Sstevel@tonic-gate } 21010Sstevel@tonic-gate if (can_deliver) { 21020Sstevel@tonic-gate int32_t nrwnd; 21030Sstevel@tonic-gate 21040Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)(dc + 1); 21050Sstevel@tonic-gate dmp->b_next = NULL; 21060Sstevel@tonic-gate ASSERT(dmp->b_prev == NULL); 21070Sstevel@tonic-gate if (sctp_input_add_ancillary(sctp, 21080Sstevel@tonic-gate &dmp, dc, fp, ipp) == 0) { 21090Sstevel@tonic-gate sctp->sctp_rxqueued -= dlen; 21100Sstevel@tonic-gate sctp->sctp_rwnd -= dlen; 21110Sstevel@tonic-gate nrwnd = sctp->sctp_ulp_recv( 21120Sstevel@tonic-gate sctp->sctp_ulpd, dmp, 0); 21130Sstevel@tonic-gate if (nrwnd > sctp->sctp_rwnd) 21140Sstevel@tonic-gate sctp->sctp_rwnd = nrwnd; 21150Sstevel@tonic-gate } else { 21160Sstevel@tonic-gate /* 21170Sstevel@tonic-gate * We will resume processing when 21180Sstevel@tonic-gate * the FTSN chunk is re-xmitted. 21190Sstevel@tonic-gate */ 21200Sstevel@tonic-gate dmp->b_rptr = (uchar_t *)dc; 21210Sstevel@tonic-gate dmp->b_next = next; 21220Sstevel@tonic-gate dprint(0, 21230Sstevel@tonic-gate ("FTSN dequeuing %u failed\n", 21240Sstevel@tonic-gate ntohs(dc->sdh_ssn))); 21250Sstevel@tonic-gate return; 21260Sstevel@tonic-gate } 21270Sstevel@tonic-gate } else { 21280Sstevel@tonic-gate sctp->sctp_rxqueued -= dlen; 21290Sstevel@tonic-gate ASSERT(dmp->b_prev == NULL); 21300Sstevel@tonic-gate dmp->b_next = NULL; 21310Sstevel@tonic-gate freemsg(dmp); 21320Sstevel@tonic-gate } 21330Sstevel@tonic-gate instr->istr_nmsgs--; 21340Sstevel@tonic-gate instr->nextseq++; 21350Sstevel@tonic-gate sctp->sctp_istr_nmsgs--; 21360Sstevel@tonic-gate if (next != NULL) 21370Sstevel@tonic-gate next->b_prev = NULL; 21380Sstevel@tonic-gate instr->istr_msgs = next; 21390Sstevel@tonic-gate } 21400Sstevel@tonic-gate ftsn_entry++; 21410Sstevel@tonic-gate remaining -= sizeof (*ftsn_entry); 21420Sstevel@tonic-gate } 21430Sstevel@tonic-gate /* Duplicate FTSN */ 21440Sstevel@tonic-gate if (*ftsn <= (sctp->sctp_ftsn - 1)) { 21450Sstevel@tonic-gate sctp->sctp_force_sack = 1; 21460Sstevel@tonic-gate return; 21470Sstevel@tonic-gate } 21480Sstevel@tonic-gate /* Advance cum TSN to that reported in the Forward TSN chunk */ 21490Sstevel@tonic-gate sctp->sctp_ftsn = *ftsn + 1; 21500Sstevel@tonic-gate 21510Sstevel@tonic-gate /* Remove all the SACK gaps before the new cum TSN */ 21520Sstevel@tonic-gate if (sctp->sctp_sack_info != NULL) { 21530Sstevel@tonic-gate sctp_ack_rem(&sctp->sctp_sack_info, sctp->sctp_ftsn - 1, 21540Sstevel@tonic-gate &sctp->sctp_sack_gaps); 21550Sstevel@tonic-gate } 21560Sstevel@tonic-gate /* 21570Sstevel@tonic-gate * If there are gap reports pending, check if advancing 21580Sstevel@tonic-gate * the ftsn here closes a gap. If so, we can advance 21590Sstevel@tonic-gate * ftsn to the end of the set. 21600Sstevel@tonic-gate * If ftsn has moved forward, maybe we can remove gap reports. 21610Sstevel@tonic-gate */ 21620Sstevel@tonic-gate if (sctp->sctp_sack_info != NULL && 21630Sstevel@tonic-gate sctp->sctp_ftsn == sctp->sctp_sack_info->begin) { 21640Sstevel@tonic-gate sctp->sctp_ftsn = sctp->sctp_sack_info->end + 1; 21650Sstevel@tonic-gate sctp_ack_rem(&sctp->sctp_sack_info, sctp->sctp_ftsn - 1, 21660Sstevel@tonic-gate &sctp->sctp_sack_gaps); 21670Sstevel@tonic-gate } 21680Sstevel@tonic-gate } 21690Sstevel@tonic-gate 21700Sstevel@tonic-gate /* 21710Sstevel@tonic-gate * When we have processed a SACK we check to see if we can advance the 21720Sstevel@tonic-gate * cumulative TSN if there are abandoned chunks immediately following 21730Sstevel@tonic-gate * the updated cumulative TSN. If there are, we attempt to send a 21740Sstevel@tonic-gate * Forward TSN chunk. 21750Sstevel@tonic-gate */ 21760Sstevel@tonic-gate static void 21770Sstevel@tonic-gate sctp_check_abandoned_data(sctp_t *sctp, sctp_faddr_t *fp) 21780Sstevel@tonic-gate { 21790Sstevel@tonic-gate mblk_t *meta = sctp->sctp_xmit_head; 21800Sstevel@tonic-gate mblk_t *mp; 21810Sstevel@tonic-gate mblk_t *nmp; 21820Sstevel@tonic-gate uint32_t seglen; 21830Sstevel@tonic-gate uint32_t adv_pap = sctp->sctp_adv_pap; 21840Sstevel@tonic-gate 21850Sstevel@tonic-gate /* 21860Sstevel@tonic-gate * We only check in the first meta since otherwise we can't 21870Sstevel@tonic-gate * advance the cumulative ack point. We just look for chunks 21880Sstevel@tonic-gate * marked for retransmission, else we might prematurely 21890Sstevel@tonic-gate * send an FTSN for a sent, but unacked, chunk. 21900Sstevel@tonic-gate */ 21910Sstevel@tonic-gate for (mp = meta->b_cont; mp != NULL; mp = mp->b_next) { 21920Sstevel@tonic-gate if (!SCTP_CHUNK_ISSENT(mp)) 21930Sstevel@tonic-gate return; 21940Sstevel@tonic-gate if (SCTP_CHUNK_WANT_REXMIT(mp)) 21950Sstevel@tonic-gate break; 21960Sstevel@tonic-gate } 21970Sstevel@tonic-gate if (mp == NULL) 21980Sstevel@tonic-gate return; 21990Sstevel@tonic-gate sctp_check_adv_ack_pt(sctp, meta, mp); 22000Sstevel@tonic-gate if (SEQ_GT(sctp->sctp_adv_pap, adv_pap)) { 22010Sstevel@tonic-gate sctp_make_ftsns(sctp, meta, mp, &nmp, fp, &seglen); 22020Sstevel@tonic-gate if (nmp == NULL) { 22030Sstevel@tonic-gate sctp->sctp_adv_pap = adv_pap; 22040Sstevel@tonic-gate if (!fp->timer_running) 22050Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, fp->rto); 22060Sstevel@tonic-gate return; 22070Sstevel@tonic-gate } 22080Sstevel@tonic-gate sctp_set_iplen(sctp, nmp); 22090Sstevel@tonic-gate sctp_add_sendq(sctp, nmp); 22100Sstevel@tonic-gate if (!fp->timer_running) 22110Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, fp->rto); 22120Sstevel@tonic-gate } 22130Sstevel@tonic-gate } 22140Sstevel@tonic-gate 2215852Svi117747 /* 2216852Svi117747 * The processing here follows the same logic in sctp_got_sack(), the reason 2217852Svi117747 * we do this separately is because, usually, gap blocks are ordered and 2218852Svi117747 * we can process it in sctp_got_sack(). However if they aren't we would 2219852Svi117747 * need to do some additional non-optimal stuff when we start processing the 2220852Svi117747 * unordered gaps. To that effect sctp_got_sack() does the processing in the 2221852Svi117747 * simple case and this does the same in the more involved case. 2222852Svi117747 */ 2223852Svi117747 static uint32_t 2224852Svi117747 sctp_process_uo_gaps(sctp_t *sctp, uint32_t ctsn, sctp_sack_frag_t *ssf, 2225852Svi117747 int num_gaps, mblk_t *umphead, mblk_t *mphead, int *trysend, 2226852Svi117747 boolean_t *fast_recovery, uint32_t fr_xtsn) 2227852Svi117747 { 2228852Svi117747 uint32_t xtsn; 2229852Svi117747 uint32_t gapstart = 0; 2230852Svi117747 uint32_t gapend = 0; 2231852Svi117747 int gapcnt; 2232852Svi117747 uint16_t chunklen; 2233852Svi117747 sctp_data_hdr_t *sdc; 2234852Svi117747 int gstart; 2235852Svi117747 mblk_t *ump = umphead; 2236852Svi117747 mblk_t *mp = mphead; 2237852Svi117747 sctp_faddr_t *fp; 2238852Svi117747 uint32_t acked = 0; 2239852Svi117747 2240852Svi117747 /* 2241852Svi117747 * gstart tracks the last (in the order of TSN) gapstart that 2242852Svi117747 * we process in this SACK gaps walk. 2243852Svi117747 */ 2244852Svi117747 gstart = ctsn; 2245852Svi117747 2246852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2247852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2248852Svi117747 for (gapcnt = 0; gapcnt < num_gaps; gapcnt++, ssf++) { 2249852Svi117747 if (gapstart != 0) { 2250852Svi117747 /* 2251852Svi117747 * If we have reached the end of the transmit list or 2252852Svi117747 * hit an unsent chunk or encountered an unordered gap 2253852Svi117747 * block start from the ctsn again. 2254852Svi117747 */ 2255852Svi117747 if (ump == NULL || !SCTP_CHUNK_ISSENT(mp) || 2256852Svi117747 SEQ_LT(ctsn + ntohs(ssf->ssf_start), xtsn)) { 2257852Svi117747 ump = umphead; 2258852Svi117747 mp = mphead; 2259852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2260852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2261852Svi117747 } 2262852Svi117747 } 2263852Svi117747 2264852Svi117747 gapstart = ctsn + ntohs(ssf->ssf_start); 2265852Svi117747 gapend = ctsn + ntohs(ssf->ssf_end); 2266852Svi117747 2267852Svi117747 /* SACK for TSN we have not sent - ABORT */ 2268852Svi117747 if (SEQ_GT(gapstart, sctp->sctp_ltsn - 1) || 2269852Svi117747 SEQ_GT(gapend, sctp->sctp_ltsn - 1)) { 2270852Svi117747 BUMP_MIB(&sctp_mib, sctpInAckUnsent); 2271852Svi117747 *trysend = -1; 2272852Svi117747 return (acked); 2273852Svi117747 } else if (SEQ_LT(gapend, gapstart)) { 2274852Svi117747 break; 2275852Svi117747 } 2276852Svi117747 /* 2277852Svi117747 * The xtsn can be the TSN processed for the last gap 2278852Svi117747 * (gapend) or it could be the cumulative TSN. We continue 2279852Svi117747 * with the last xtsn as long as the gaps are ordered, when 2280852Svi117747 * we hit an unordered gap, we re-start from the cumulative 2281852Svi117747 * TSN. For the first gap it is always the cumulative TSN. 2282852Svi117747 */ 2283852Svi117747 while (xtsn != gapstart) { 2284852Svi117747 /* 2285852Svi117747 * We can't reliably check for reneged chunks 2286852Svi117747 * when walking the unordered list, so we don't. 2287852Svi117747 * In case the peer reneges then we will end up 2288852Svi117747 * sending the reneged chunk via timeout. 2289852Svi117747 */ 2290852Svi117747 mp = mp->b_next; 2291852Svi117747 if (mp == NULL) { 2292852Svi117747 ump = ump->b_next; 2293852Svi117747 /* 2294852Svi117747 * ump can't be NULL because of the sanity 2295852Svi117747 * check above. 2296852Svi117747 */ 2297852Svi117747 ASSERT(ump != NULL); 2298852Svi117747 mp = ump->b_cont; 2299852Svi117747 } 2300852Svi117747 /* 2301852Svi117747 * mp can't be unsent because of the sanity check 2302852Svi117747 * above. 2303852Svi117747 */ 2304852Svi117747 ASSERT(SCTP_CHUNK_ISSENT(mp)); 2305852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2306852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2307852Svi117747 } 2308852Svi117747 /* 2309852Svi117747 * Now that we have found the chunk with TSN == 'gapstart', 2310852Svi117747 * let's walk till we hit the chunk with TSN == 'gapend'. 2311852Svi117747 * All intermediate chunks will be marked ACKED, if they 2312852Svi117747 * haven't already been. 2313852Svi117747 */ 2314852Svi117747 while (SEQ_LEQ(xtsn, gapend)) { 2315852Svi117747 /* 2316852Svi117747 * SACKed 2317852Svi117747 */ 2318852Svi117747 SCTP_CHUNK_SET_SACKCNT(mp, 0); 2319852Svi117747 if (!SCTP_CHUNK_ISACKED(mp)) { 2320852Svi117747 SCTP_CHUNK_ACKED(mp); 2321852Svi117747 2322852Svi117747 fp = SCTP_CHUNK_DEST(mp); 2323852Svi117747 chunklen = ntohs(sdc->sdh_len); 2324852Svi117747 ASSERT(fp->suna >= chunklen); 2325852Svi117747 fp->suna -= chunklen; 2326852Svi117747 if (fp->suna == 0) { 2327852Svi117747 /* All outstanding data acked. */ 2328852Svi117747 fp->pba = 0; 2329852Svi117747 SCTP_FADDR_TIMER_STOP(fp); 2330852Svi117747 } 2331852Svi117747 fp->acked += chunklen; 2332852Svi117747 acked += chunklen; 2333852Svi117747 sctp->sctp_unacked -= chunklen - sizeof (*sdc); 2334852Svi117747 ASSERT(sctp->sctp_unacked >= 0); 2335852Svi117747 } 2336852Svi117747 /* 2337852Svi117747 * Move to the next message in the transmit list 2338852Svi117747 * if we are done with all the chunks from the current 2339852Svi117747 * message. Note, it is possible to hit the end of the 2340852Svi117747 * transmit list here, i.e. if we have already completed 2341852Svi117747 * processing the gap block. 2342852Svi117747 */ 2343852Svi117747 mp = mp->b_next; 2344852Svi117747 if (mp == NULL) { 2345852Svi117747 ump = ump->b_next; 2346852Svi117747 if (ump == NULL) { 2347852Svi117747 ASSERT(xtsn == gapend); 2348852Svi117747 break; 2349852Svi117747 } 2350852Svi117747 mp = ump->b_cont; 2351852Svi117747 } 2352852Svi117747 /* 2353852Svi117747 * Likewise, we can hit an unsent chunk once we have 2354852Svi117747 * completed processing the gap block. 2355852Svi117747 */ 2356852Svi117747 if (!SCTP_CHUNK_ISSENT(mp)) { 2357852Svi117747 ASSERT(xtsn == gapend); 2358852Svi117747 break; 2359852Svi117747 } 2360852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2361852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2362852Svi117747 } 2363852Svi117747 /* 2364852Svi117747 * We keep track of the last gap we successfully processed 2365852Svi117747 * so that we can terminate the walk below for incrementing 2366852Svi117747 * the SACK count. 2367852Svi117747 */ 2368852Svi117747 if (SEQ_LT(gstart, gapstart)) 2369852Svi117747 gstart = gapstart; 2370852Svi117747 } 2371852Svi117747 /* 2372852Svi117747 * Check if have incremented the SACK count for all unacked TSNs in 2373852Svi117747 * sctp_got_sack(), if so we are done. 2374852Svi117747 */ 2375852Svi117747 if (SEQ_LEQ(gstart, fr_xtsn)) 2376852Svi117747 return (acked); 2377852Svi117747 2378852Svi117747 ump = umphead; 2379852Svi117747 mp = mphead; 2380852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2381852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2382852Svi117747 while (SEQ_LT(xtsn, gstart)) { 2383852Svi117747 /* 2384852Svi117747 * We have incremented SACK count for TSNs less than fr_tsn 2385852Svi117747 * in sctp_got_sack(), so don't increment them again here. 2386852Svi117747 */ 2387852Svi117747 if (SEQ_GT(xtsn, fr_xtsn) && !SCTP_CHUNK_ISACKED(mp)) { 2388852Svi117747 SCTP_CHUNK_SET_SACKCNT(mp, SCTP_CHUNK_SACKCNT(mp) + 1); 2389852Svi117747 if (SCTP_CHUNK_SACKCNT(mp) == sctp_fast_rxt_thresh) { 2390852Svi117747 SCTP_CHUNK_REXMIT(mp); 2391852Svi117747 sctp->sctp_chk_fast_rexmit = B_TRUE; 2392852Svi117747 *trysend = 1; 2393852Svi117747 if (!*fast_recovery) { 2394852Svi117747 /* 2395852Svi117747 * Entering fast recovery. 2396852Svi117747 */ 2397852Svi117747 fp = SCTP_CHUNK_DEST(mp); 2398852Svi117747 fp->ssthresh = fp->cwnd / 2; 2399852Svi117747 if (fp->ssthresh < 2 * fp->sfa_pmss) { 2400852Svi117747 fp->ssthresh = 2401852Svi117747 2 * fp->sfa_pmss; 2402852Svi117747 } 2403852Svi117747 fp->cwnd = fp->ssthresh; 2404852Svi117747 fp->pba = 0; 2405852Svi117747 sctp->sctp_recovery_tsn = 2406852Svi117747 sctp->sctp_ltsn - 1; 2407852Svi117747 *fast_recovery = B_TRUE; 2408852Svi117747 } 2409852Svi117747 } 2410852Svi117747 } 2411852Svi117747 mp = mp->b_next; 2412852Svi117747 if (mp == NULL) { 2413852Svi117747 ump = ump->b_next; 2414852Svi117747 /* We can't get to the end of the transmit list here */ 2415852Svi117747 ASSERT(ump != NULL); 2416852Svi117747 mp = ump->b_cont; 2417852Svi117747 } 2418852Svi117747 /* We can't hit an unsent chunk here */ 2419852Svi117747 ASSERT(SCTP_CHUNK_ISSENT(mp)); 2420852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2421852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2422852Svi117747 } 2423852Svi117747 return (acked); 2424852Svi117747 } 2425852Svi117747 24260Sstevel@tonic-gate static int 24270Sstevel@tonic-gate sctp_got_sack(sctp_t *sctp, sctp_chunk_hdr_t *sch) 24280Sstevel@tonic-gate { 24290Sstevel@tonic-gate sctp_sack_chunk_t *sc; 24300Sstevel@tonic-gate sctp_data_hdr_t *sdc; 24310Sstevel@tonic-gate sctp_sack_frag_t *ssf; 24320Sstevel@tonic-gate mblk_t *ump; 24330Sstevel@tonic-gate mblk_t *mp; 2434852Svi117747 mblk_t *mp1; 2435852Svi117747 uint32_t cumtsn; 24360Sstevel@tonic-gate uint32_t xtsn; 2437852Svi117747 uint32_t gapstart = 0; 2438852Svi117747 uint32_t gapend = 0; 24390Sstevel@tonic-gate uint32_t acked = 0; 24400Sstevel@tonic-gate uint16_t chunklen; 24410Sstevel@tonic-gate sctp_faddr_t *fp; 24420Sstevel@tonic-gate int num_gaps; 24430Sstevel@tonic-gate int trysend = 0; 24440Sstevel@tonic-gate int i; 24450Sstevel@tonic-gate boolean_t fast_recovery = B_FALSE; 24460Sstevel@tonic-gate boolean_t cumack_forward = B_FALSE; 24470Sstevel@tonic-gate boolean_t fwd_tsn = B_FALSE; 24480Sstevel@tonic-gate 24490Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 24500Sstevel@tonic-gate chunklen = ntohs(sch->sch_len); 24510Sstevel@tonic-gate if (chunklen < (sizeof (*sch) + sizeof (*sc))) 24520Sstevel@tonic-gate return (0); 24530Sstevel@tonic-gate 24540Sstevel@tonic-gate sc = (sctp_sack_chunk_t *)(sch + 1); 2455852Svi117747 cumtsn = ntohl(sc->ssc_cumtsn); 2456852Svi117747 2457852Svi117747 dprint(2, ("got sack cumtsn %x -> %x\n", sctp->sctp_lastack_rxd, 2458852Svi117747 cumtsn)); 24590Sstevel@tonic-gate 24600Sstevel@tonic-gate /* out of order */ 2461852Svi117747 if (SEQ_LT(cumtsn, sctp->sctp_lastack_rxd)) 24620Sstevel@tonic-gate return (0); 24630Sstevel@tonic-gate 2464852Svi117747 if (SEQ_GT(cumtsn, sctp->sctp_ltsn - 1)) { 24650Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInAckUnsent); 2466852Svi117747 /* Send an ABORT */ 2467852Svi117747 return (-1); 24680Sstevel@tonic-gate } 24690Sstevel@tonic-gate 24700Sstevel@tonic-gate /* 24710Sstevel@tonic-gate * Cwnd only done when not in fast recovery mode. 24720Sstevel@tonic-gate */ 24730Sstevel@tonic-gate if (SEQ_LT(sctp->sctp_lastack_rxd, sctp->sctp_recovery_tsn)) 24740Sstevel@tonic-gate fast_recovery = B_TRUE; 24750Sstevel@tonic-gate 24760Sstevel@tonic-gate /* 24770Sstevel@tonic-gate * .. and if the cum TSN is not moving ahead on account Forward TSN 24780Sstevel@tonic-gate */ 24790Sstevel@tonic-gate if (SEQ_LT(sctp->sctp_lastack_rxd, sctp->sctp_adv_pap)) 24800Sstevel@tonic-gate fwd_tsn = B_TRUE; 24810Sstevel@tonic-gate 2482852Svi117747 if (cumtsn == sctp->sctp_lastack_rxd && 24830Sstevel@tonic-gate (sctp->sctp_xmit_unacked == NULL || 24840Sstevel@tonic-gate !SCTP_CHUNK_ABANDONED(sctp->sctp_xmit_unacked))) { 24850Sstevel@tonic-gate if (sctp->sctp_xmit_unacked != NULL) 24860Sstevel@tonic-gate mp = sctp->sctp_xmit_unacked; 24870Sstevel@tonic-gate else if (sctp->sctp_xmit_head != NULL) 24880Sstevel@tonic-gate mp = sctp->sctp_xmit_head->b_cont; 24890Sstevel@tonic-gate else 24900Sstevel@tonic-gate mp = NULL; 24910Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInDupAck); 24920Sstevel@tonic-gate } else { 2493852Svi117747 acked = sctp_cumack(sctp, cumtsn, &mp); 24940Sstevel@tonic-gate sctp->sctp_xmit_unacked = mp; 24950Sstevel@tonic-gate if (acked > 0) { 24960Sstevel@tonic-gate trysend = 1; 24970Sstevel@tonic-gate cumack_forward = B_TRUE; 24980Sstevel@tonic-gate if (fwd_tsn && SEQ_GEQ(sctp->sctp_lastack_rxd, 24990Sstevel@tonic-gate sctp->sctp_adv_pap)) { 25000Sstevel@tonic-gate cumack_forward = B_FALSE; 25010Sstevel@tonic-gate } 25020Sstevel@tonic-gate } 25030Sstevel@tonic-gate } 25040Sstevel@tonic-gate num_gaps = ntohs(sc->ssc_numfrags); 25050Sstevel@tonic-gate if (num_gaps == 0 || mp == NULL || !SCTP_CHUNK_ISSENT(mp) || 25060Sstevel@tonic-gate chunklen < (sizeof (*sch) + sizeof (*sc) + 25070Sstevel@tonic-gate num_gaps * sizeof (*ssf))) { 25080Sstevel@tonic-gate goto ret; 25090Sstevel@tonic-gate } 2510852Svi117747 #ifdef DEBUG 2511852Svi117747 /* 2512852Svi117747 * Since we delete any message that has been acked completely, 2513852Svi117747 * the unacked chunk must belong to sctp_xmit_head (as 2514852Svi117747 * we don't have a back pointer from the mp to the meta data 2515852Svi117747 * we do this). 2516852Svi117747 */ 2517852Svi117747 { 2518852Svi117747 mblk_t *mp2 = sctp->sctp_xmit_head->b_cont; 2519852Svi117747 2520852Svi117747 while (mp2 != NULL) { 2521852Svi117747 if (mp2 == mp) 2522852Svi117747 break; 2523852Svi117747 mp2 = mp2->b_next; 2524852Svi117747 } 2525852Svi117747 ASSERT(mp2 != NULL); 2526852Svi117747 } 2527852Svi117747 #endif 25280Sstevel@tonic-gate ump = sctp->sctp_xmit_head; 25290Sstevel@tonic-gate 25300Sstevel@tonic-gate /* 2531852Svi117747 * Just remember where we started from, in case we need to call 2532852Svi117747 * sctp_process_uo_gaps() if the gap blocks are unordered. 2533852Svi117747 */ 2534852Svi117747 mp1 = mp; 2535852Svi117747 2536852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2537852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2538852Svi117747 ASSERT(xtsn == cumtsn + 1); 2539852Svi117747 2540852Svi117747 /* 25410Sstevel@tonic-gate * Go through SACK gaps. They are ordered based on start TSN. 25420Sstevel@tonic-gate */ 25430Sstevel@tonic-gate ssf = (sctp_sack_frag_t *)(sc + 1); 2544852Svi117747 for (i = 0; i < num_gaps; i++, ssf++) { 2545852Svi117747 if (gapstart != 0) { 2546852Svi117747 /* check for unordered gap */ 2547852Svi117747 if (SEQ_LEQ(cumtsn + ntohs(ssf->ssf_start), gapstart)) { 2548852Svi117747 acked += sctp_process_uo_gaps(sctp, 2549852Svi117747 cumtsn, ssf, num_gaps - i, 2550852Svi117747 sctp->sctp_xmit_head, mp1, 2551852Svi117747 &trysend, &fast_recovery, gapstart); 2552852Svi117747 if (trysend < 0) { 2553852Svi117747 BUMP_MIB(&sctp_mib, sctpInAckUnsent); 2554852Svi117747 return (-1); 2555852Svi117747 } 2556852Svi117747 break; 2557852Svi117747 } 2558852Svi117747 } 2559852Svi117747 gapstart = cumtsn + ntohs(ssf->ssf_start); 2560852Svi117747 gapend = cumtsn + ntohs(ssf->ssf_end); 2561852Svi117747 2562852Svi117747 /* SACK for TSN we have not sent - ABORT */ 2563852Svi117747 if (SEQ_GT(gapstart, sctp->sctp_ltsn - 1) || 2564852Svi117747 SEQ_GT(gapend, sctp->sctp_ltsn - 1)) { 2565852Svi117747 BUMP_MIB(&sctp_mib, sctpInAckUnsent); 2566852Svi117747 return (-1); 2567852Svi117747 } else if (SEQ_LT(gapend, gapstart)) { 2568852Svi117747 break; 2569852Svi117747 } 2570852Svi117747 /* 2571852Svi117747 * Let's start at the current TSN (for the 1st gap we start 2572852Svi117747 * from the cumulative TSN, for subsequent ones we start from 2573852Svi117747 * where the previous gapend was found - second while loop 2574852Svi117747 * below) and walk the transmit list till we find the TSN 2575852Svi117747 * corresponding to gapstart. All the unacked chunks till we 2576852Svi117747 * get to the chunk with TSN == gapstart will have their 2577852Svi117747 * SACKCNT incremented by 1. Note since the gap blocks are 2578852Svi117747 * ordered, we won't be incrementing the SACKCNT for an 2579852Svi117747 * unacked chunk by more than one while processing the gap 2580852Svi117747 * blocks. If the SACKCNT for any unacked chunk exceeds 2581852Svi117747 * the fast retransmit threshold, we will fast retransmit 2582852Svi117747 * after processing all the gap blocks. 2583852Svi117747 */ 2584852Svi117747 ASSERT(SEQ_LT(xtsn, gapstart)); 25850Sstevel@tonic-gate while (xtsn != gapstart) { 25860Sstevel@tonic-gate SCTP_CHUNK_SET_SACKCNT(mp, SCTP_CHUNK_SACKCNT(mp) + 1); 25870Sstevel@tonic-gate if (SCTP_CHUNK_SACKCNT(mp) == sctp_fast_rxt_thresh) { 25880Sstevel@tonic-gate SCTP_CHUNK_REXMIT(mp); 25890Sstevel@tonic-gate sctp->sctp_chk_fast_rexmit = B_TRUE; 25900Sstevel@tonic-gate trysend = 1; 25910Sstevel@tonic-gate if (!fast_recovery) { 25920Sstevel@tonic-gate /* 25930Sstevel@tonic-gate * Entering fast recovery. 25940Sstevel@tonic-gate */ 25950Sstevel@tonic-gate fp = SCTP_CHUNK_DEST(mp); 25960Sstevel@tonic-gate fp->ssthresh = fp->cwnd / 2; 25970Sstevel@tonic-gate if (fp->ssthresh < 2 * fp->sfa_pmss) { 25980Sstevel@tonic-gate fp->ssthresh = 25990Sstevel@tonic-gate 2 * fp->sfa_pmss; 26000Sstevel@tonic-gate } 26010Sstevel@tonic-gate fp->cwnd = fp->ssthresh; 26020Sstevel@tonic-gate fp->pba = 0; 26030Sstevel@tonic-gate sctp->sctp_recovery_tsn = 26040Sstevel@tonic-gate sctp->sctp_ltsn - 1; 26050Sstevel@tonic-gate fast_recovery = B_TRUE; 26060Sstevel@tonic-gate } 26070Sstevel@tonic-gate } 26080Sstevel@tonic-gate 26090Sstevel@tonic-gate /* 26100Sstevel@tonic-gate * Peer may have reneged on this chunk, so un-sack 26110Sstevel@tonic-gate * it now. If the peer did renege, we need to 26120Sstevel@tonic-gate * readjust unacked. 26130Sstevel@tonic-gate */ 26140Sstevel@tonic-gate if (SCTP_CHUNK_ISACKED(mp)) { 26150Sstevel@tonic-gate chunklen = ntohs(sdc->sdh_len); 26160Sstevel@tonic-gate fp = SCTP_CHUNK_DEST(mp); 26170Sstevel@tonic-gate fp->suna += chunklen; 26180Sstevel@tonic-gate sctp->sctp_unacked += chunklen - sizeof (*sdc); 26190Sstevel@tonic-gate SCTP_CHUNK_CLEAR_ACKED(mp); 26200Sstevel@tonic-gate if (!fp->timer_running) { 26210Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, 26220Sstevel@tonic-gate fp->rto); 26230Sstevel@tonic-gate } 26240Sstevel@tonic-gate } 26250Sstevel@tonic-gate 26260Sstevel@tonic-gate mp = mp->b_next; 26270Sstevel@tonic-gate if (mp == NULL) { 26280Sstevel@tonic-gate ump = ump->b_next; 2629852Svi117747 /* 2630852Svi117747 * ump can't be NULL given the sanity check 2631852Svi117747 * above. 2632852Svi117747 */ 2633852Svi117747 ASSERT(ump != NULL); 26340Sstevel@tonic-gate mp = ump->b_cont; 26350Sstevel@tonic-gate } 2636852Svi117747 /* 2637852Svi117747 * mp can't be unsent given the sanity check above. 2638852Svi117747 */ 2639852Svi117747 ASSERT(SCTP_CHUNK_ISSENT(mp)); 26400Sstevel@tonic-gate sdc = (sctp_data_hdr_t *)mp->b_rptr; 26410Sstevel@tonic-gate xtsn = ntohl(sdc->sdh_tsn); 26420Sstevel@tonic-gate } 2643852Svi117747 /* 2644852Svi117747 * Now that we have found the chunk with TSN == 'gapstart', 2645852Svi117747 * let's walk till we hit the chunk with TSN == 'gapend'. 2646852Svi117747 * All intermediate chunks will be marked ACKED, if they 2647852Svi117747 * haven't already been. 2648852Svi117747 */ 26490Sstevel@tonic-gate while (SEQ_LEQ(xtsn, gapend)) { 26500Sstevel@tonic-gate /* 26510Sstevel@tonic-gate * SACKed 26520Sstevel@tonic-gate */ 26530Sstevel@tonic-gate SCTP_CHUNK_SET_SACKCNT(mp, 0); 26540Sstevel@tonic-gate if (!SCTP_CHUNK_ISACKED(mp)) { 26550Sstevel@tonic-gate SCTP_CHUNK_ACKED(mp); 26560Sstevel@tonic-gate 26570Sstevel@tonic-gate fp = SCTP_CHUNK_DEST(mp); 26580Sstevel@tonic-gate chunklen = ntohs(sdc->sdh_len); 26590Sstevel@tonic-gate ASSERT(fp->suna >= chunklen); 26600Sstevel@tonic-gate fp->suna -= chunklen; 26610Sstevel@tonic-gate if (fp->suna == 0) { 26620Sstevel@tonic-gate /* All outstanding data acked. */ 26630Sstevel@tonic-gate fp->pba = 0; 26640Sstevel@tonic-gate SCTP_FADDR_TIMER_STOP(fp); 26650Sstevel@tonic-gate } 26660Sstevel@tonic-gate fp->acked += chunklen; 26670Sstevel@tonic-gate acked += chunklen; 26680Sstevel@tonic-gate sctp->sctp_unacked -= chunklen - sizeof (*sdc); 26690Sstevel@tonic-gate ASSERT(sctp->sctp_unacked >= 0); 26700Sstevel@tonic-gate } 2671852Svi117747 /* Go to the next chunk of the current message */ 26720Sstevel@tonic-gate mp = mp->b_next; 2673852Svi117747 /* 2674852Svi117747 * Move to the next message in the transmit list 2675852Svi117747 * if we are done with all the chunks from the current 2676852Svi117747 * message. Note, it is possible to hit the end of the 2677852Svi117747 * transmit list here, i.e. if we have already completed 2678852Svi117747 * processing the gap block. 2679852Svi117747 * Also, note that we break here, which means we 2680852Svi117747 * continue processing gap blocks, if any. In case of 2681852Svi117747 * ordered gap blocks there can't be any following 2682852Svi117747 * this (if there is it will fail the sanity check 2683852Svi117747 * above). In case of un-ordered gap blocks we will 2684852Svi117747 * switch to sctp_process_uo_gaps(). In either case 2685852Svi117747 * it should be fine to continue with NULL ump/mp, 2686852Svi117747 * but we just reset it to xmit_head. 2687852Svi117747 */ 26880Sstevel@tonic-gate if (mp == NULL) { 26890Sstevel@tonic-gate ump = ump->b_next; 26900Sstevel@tonic-gate if (ump == NULL) { 2691852Svi117747 ASSERT(xtsn == gapend); 2692852Svi117747 ump = sctp->sctp_xmit_head; 2693852Svi117747 mp = mp1; 2694852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2695852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2696852Svi117747 break; 26970Sstevel@tonic-gate } 26980Sstevel@tonic-gate mp = ump->b_cont; 26990Sstevel@tonic-gate } 2700852Svi117747 /* 2701852Svi117747 * Likewise, we could hit an unsent chunk once we have 2702852Svi117747 * completed processing the gap block. Again, it is 2703852Svi117747 * fine to continue processing gap blocks with mp 2704852Svi117747 * pointing to the unsent chunk, because if there 2705852Svi117747 * are more ordered gap blocks, they will fail the 2706852Svi117747 * sanity check, and if there are un-ordered gap blocks, 2707852Svi117747 * we will continue processing in sctp_process_uo_gaps() 2708852Svi117747 * We just reset the mp to the one we started with. 2709852Svi117747 */ 27100Sstevel@tonic-gate if (!SCTP_CHUNK_ISSENT(mp)) { 2711852Svi117747 ASSERT(xtsn == gapend); 2712852Svi117747 ump = sctp->sctp_xmit_head; 2713852Svi117747 mp = mp1; 2714852Svi117747 sdc = (sctp_data_hdr_t *)mp->b_rptr; 2715852Svi117747 xtsn = ntohl(sdc->sdh_tsn); 2716852Svi117747 break; 27170Sstevel@tonic-gate } 27180Sstevel@tonic-gate sdc = (sctp_data_hdr_t *)mp->b_rptr; 27190Sstevel@tonic-gate xtsn = ntohl(sdc->sdh_tsn); 27200Sstevel@tonic-gate } 27210Sstevel@tonic-gate } 27220Sstevel@tonic-gate if (sctp->sctp_prsctp_aware) 27230Sstevel@tonic-gate sctp_check_abandoned_data(sctp, sctp->sctp_current); 27240Sstevel@tonic-gate if (sctp->sctp_chk_fast_rexmit) 27250Sstevel@tonic-gate sctp_fast_rexmit(sctp); 27260Sstevel@tonic-gate ret: 27270Sstevel@tonic-gate trysend += sctp_set_frwnd(sctp, ntohl(sc->ssc_a_rwnd)); 27280Sstevel@tonic-gate 27290Sstevel@tonic-gate /* 27300Sstevel@tonic-gate * If receive window is closed while there is unsent data, 27310Sstevel@tonic-gate * set a timer for doing zero window probes. 27320Sstevel@tonic-gate */ 27330Sstevel@tonic-gate if (sctp->sctp_frwnd == 0 && sctp->sctp_unacked == 0 && 27340Sstevel@tonic-gate sctp->sctp_unsent != 0) { 27350Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, sctp->sctp_current, 27360Sstevel@tonic-gate sctp->sctp_current->rto); 27370Sstevel@tonic-gate } 27380Sstevel@tonic-gate 27390Sstevel@tonic-gate /* 27400Sstevel@tonic-gate * Set cwnd for all destinations. 27410Sstevel@tonic-gate * Congestion window gets increased only when cumulative 27420Sstevel@tonic-gate * TSN moves forward, we're not in fast recovery, and 27430Sstevel@tonic-gate * cwnd has been fully utilized (almost fully, need to allow 27440Sstevel@tonic-gate * some leeway due to non-MSS sized messages). 27450Sstevel@tonic-gate */ 27460Sstevel@tonic-gate if (sctp->sctp_current->acked == acked) { 27470Sstevel@tonic-gate /* 27480Sstevel@tonic-gate * Fast-path, only data sent to sctp_current got acked. 27490Sstevel@tonic-gate */ 27500Sstevel@tonic-gate fp = sctp->sctp_current; 27510Sstevel@tonic-gate if (cumack_forward && !fast_recovery && 27520Sstevel@tonic-gate (fp->acked + fp->suna > fp->cwnd - fp->sfa_pmss)) { 27530Sstevel@tonic-gate if (fp->cwnd < fp->ssthresh) { 27540Sstevel@tonic-gate /* 27550Sstevel@tonic-gate * Slow start 27560Sstevel@tonic-gate */ 27570Sstevel@tonic-gate if (fp->acked > fp->sfa_pmss) { 27580Sstevel@tonic-gate fp->cwnd += fp->sfa_pmss; 27590Sstevel@tonic-gate } else { 27600Sstevel@tonic-gate fp->cwnd += fp->acked; 27610Sstevel@tonic-gate } 27620Sstevel@tonic-gate fp->cwnd = MIN(fp->cwnd, sctp->sctp_cwnd_max); 27630Sstevel@tonic-gate } else { 27640Sstevel@tonic-gate /* 27650Sstevel@tonic-gate * Congestion avoidance 27660Sstevel@tonic-gate */ 27670Sstevel@tonic-gate fp->pba += fp->acked; 27680Sstevel@tonic-gate if (fp->pba >= fp->cwnd) { 27690Sstevel@tonic-gate fp->pba -= fp->cwnd; 27700Sstevel@tonic-gate fp->cwnd += fp->sfa_pmss; 27710Sstevel@tonic-gate fp->cwnd = MIN(fp->cwnd, 27720Sstevel@tonic-gate sctp->sctp_cwnd_max); 27730Sstevel@tonic-gate } 27740Sstevel@tonic-gate } 27750Sstevel@tonic-gate } 27760Sstevel@tonic-gate /* 27770Sstevel@tonic-gate * Limit the burst of transmitted data segments. 27780Sstevel@tonic-gate */ 27790Sstevel@tonic-gate if (fp->suna + sctp_maxburst * fp->sfa_pmss < fp->cwnd) { 27800Sstevel@tonic-gate fp->cwnd = fp->suna + sctp_maxburst * fp->sfa_pmss; 27810Sstevel@tonic-gate } 27820Sstevel@tonic-gate fp->acked = 0; 27830Sstevel@tonic-gate return (trysend); 27840Sstevel@tonic-gate } 27850Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp; fp = fp->next) { 27860Sstevel@tonic-gate if (cumack_forward && fp->acked && !fast_recovery && 27870Sstevel@tonic-gate (fp->acked + fp->suna > fp->cwnd - fp->sfa_pmss)) { 27880Sstevel@tonic-gate if (fp->cwnd < fp->ssthresh) { 27890Sstevel@tonic-gate if (fp->acked > fp->sfa_pmss) { 27900Sstevel@tonic-gate fp->cwnd += fp->sfa_pmss; 27910Sstevel@tonic-gate } else { 27920Sstevel@tonic-gate fp->cwnd += fp->acked; 27930Sstevel@tonic-gate } 27940Sstevel@tonic-gate fp->cwnd = MIN(fp->cwnd, sctp->sctp_cwnd_max); 27950Sstevel@tonic-gate } else { 27960Sstevel@tonic-gate fp->pba += fp->acked; 27970Sstevel@tonic-gate if (fp->pba >= fp->cwnd) { 27980Sstevel@tonic-gate fp->pba -= fp->cwnd; 27990Sstevel@tonic-gate fp->cwnd += fp->sfa_pmss; 28000Sstevel@tonic-gate fp->cwnd = MIN(fp->cwnd, 28010Sstevel@tonic-gate sctp->sctp_cwnd_max); 28020Sstevel@tonic-gate } 28030Sstevel@tonic-gate } 28040Sstevel@tonic-gate } 28050Sstevel@tonic-gate if (fp->suna + sctp_maxburst * fp->sfa_pmss < fp->cwnd) { 28060Sstevel@tonic-gate fp->cwnd = fp->suna + sctp_maxburst * fp->sfa_pmss; 28070Sstevel@tonic-gate } 28080Sstevel@tonic-gate fp->acked = 0; 28090Sstevel@tonic-gate } 28100Sstevel@tonic-gate return (trysend); 28110Sstevel@tonic-gate } 28120Sstevel@tonic-gate 28130Sstevel@tonic-gate /* 28140Sstevel@tonic-gate * Returns 0 if the caller should stop processing any more chunks, 28150Sstevel@tonic-gate * 1 if the caller should skip this chunk and continue processing. 28160Sstevel@tonic-gate */ 28170Sstevel@tonic-gate static int 28180Sstevel@tonic-gate sctp_strange_chunk(sctp_t *sctp, sctp_chunk_hdr_t *ch, sctp_faddr_t *fp) 28190Sstevel@tonic-gate { 28200Sstevel@tonic-gate mblk_t *errmp; 28210Sstevel@tonic-gate size_t len; 28220Sstevel@tonic-gate 28230Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 28240Sstevel@tonic-gate /* check top two bits for action required */ 28250Sstevel@tonic-gate if (ch->sch_id & 0x40) { /* also matches 0xc0 */ 28260Sstevel@tonic-gate len = ntohs(ch->sch_len); 28270Sstevel@tonic-gate errmp = sctp_make_err(sctp, SCTP_ERR_UNREC_CHUNK, ch, len); 28280Sstevel@tonic-gate if (errmp != NULL) 28290Sstevel@tonic-gate sctp_send_err(sctp, errmp, fp); 28300Sstevel@tonic-gate if ((ch->sch_id & 0xc0) == 0xc0) { 28310Sstevel@tonic-gate /* skip and continue */ 28320Sstevel@tonic-gate return (1); 28330Sstevel@tonic-gate } else { 28340Sstevel@tonic-gate /* stop processing */ 28350Sstevel@tonic-gate return (0); 28360Sstevel@tonic-gate } 28370Sstevel@tonic-gate } 28380Sstevel@tonic-gate if (ch->sch_id & 0x80) { 28390Sstevel@tonic-gate /* skip and continue, no error */ 28400Sstevel@tonic-gate return (1); 28410Sstevel@tonic-gate } 28420Sstevel@tonic-gate /* top two bits are clear; stop processing and no error */ 28430Sstevel@tonic-gate return (0); 28440Sstevel@tonic-gate } 28450Sstevel@tonic-gate 28460Sstevel@tonic-gate /* 28470Sstevel@tonic-gate * Basic sanity checks on all input chunks and parameters: they must 28480Sstevel@tonic-gate * be of legitimate size for their purported type, and must follow 28490Sstevel@tonic-gate * ordering conventions as defined in rfc2960. 28500Sstevel@tonic-gate * 28510Sstevel@tonic-gate * Returns 1 if the chunk and all encloded params are legitimate, 28520Sstevel@tonic-gate * 0 otherwise. 28530Sstevel@tonic-gate */ 28540Sstevel@tonic-gate /*ARGSUSED*/ 28550Sstevel@tonic-gate static int 28560Sstevel@tonic-gate sctp_check_input(sctp_t *sctp, sctp_chunk_hdr_t *ch, ssize_t len, int first) 28570Sstevel@tonic-gate { 28580Sstevel@tonic-gate sctp_parm_hdr_t *ph; 28590Sstevel@tonic-gate void *p = NULL; 28600Sstevel@tonic-gate ssize_t clen; 28610Sstevel@tonic-gate uint16_t ch_len; 28620Sstevel@tonic-gate 28630Sstevel@tonic-gate ch_len = ntohs(ch->sch_len); 28640Sstevel@tonic-gate if (ch_len > len) { 28650Sstevel@tonic-gate return (0); 28660Sstevel@tonic-gate } 28670Sstevel@tonic-gate 28680Sstevel@tonic-gate switch (ch->sch_id) { 28690Sstevel@tonic-gate case CHUNK_DATA: 28700Sstevel@tonic-gate if (ch_len < sizeof (sctp_data_hdr_t)) { 28710Sstevel@tonic-gate return (0); 28720Sstevel@tonic-gate } 28730Sstevel@tonic-gate return (1); 28740Sstevel@tonic-gate case CHUNK_INIT: 28750Sstevel@tonic-gate case CHUNK_INIT_ACK: 28760Sstevel@tonic-gate { 28770Sstevel@tonic-gate ssize_t remlen = len; 28780Sstevel@tonic-gate 28790Sstevel@tonic-gate /* 28800Sstevel@tonic-gate * INIT and INIT-ACK chunks must not be bundled with 28810Sstevel@tonic-gate * any other. 28820Sstevel@tonic-gate */ 28830Sstevel@tonic-gate if (!first || sctp_next_chunk(ch, &remlen) != NULL || 28840Sstevel@tonic-gate (ch_len < (sizeof (*ch) + 28850Sstevel@tonic-gate sizeof (sctp_init_chunk_t)))) { 28860Sstevel@tonic-gate return (0); 28870Sstevel@tonic-gate } 28880Sstevel@tonic-gate /* may have params that need checking */ 28890Sstevel@tonic-gate p = (char *)(ch + 1) + sizeof (sctp_init_chunk_t); 28900Sstevel@tonic-gate clen = ch_len - (sizeof (*ch) + 28910Sstevel@tonic-gate sizeof (sctp_init_chunk_t)); 28920Sstevel@tonic-gate } 28930Sstevel@tonic-gate break; 28940Sstevel@tonic-gate case CHUNK_SACK: 28950Sstevel@tonic-gate if (ch_len < (sizeof (*ch) + sizeof (sctp_sack_chunk_t))) { 28960Sstevel@tonic-gate return (0); 28970Sstevel@tonic-gate } 28980Sstevel@tonic-gate /* dup and gap reports checked by got_sack() */ 28990Sstevel@tonic-gate return (1); 29000Sstevel@tonic-gate case CHUNK_SHUTDOWN: 29010Sstevel@tonic-gate if (ch_len < (sizeof (*ch) + sizeof (uint32_t))) { 29020Sstevel@tonic-gate return (0); 29030Sstevel@tonic-gate } 29040Sstevel@tonic-gate return (1); 29050Sstevel@tonic-gate case CHUNK_ABORT: 29060Sstevel@tonic-gate case CHUNK_ERROR: 29070Sstevel@tonic-gate if (ch_len < sizeof (*ch)) { 29080Sstevel@tonic-gate return (0); 29090Sstevel@tonic-gate } 29100Sstevel@tonic-gate /* may have params that need checking */ 29110Sstevel@tonic-gate p = ch + 1; 29120Sstevel@tonic-gate clen = ch_len - sizeof (*ch); 29130Sstevel@tonic-gate break; 29140Sstevel@tonic-gate case CHUNK_ECNE: 29150Sstevel@tonic-gate case CHUNK_CWR: 29160Sstevel@tonic-gate case CHUNK_HEARTBEAT: 29170Sstevel@tonic-gate case CHUNK_HEARTBEAT_ACK: 29180Sstevel@tonic-gate /* Full ASCONF chunk and parameter checks are in asconf.c */ 29190Sstevel@tonic-gate case CHUNK_ASCONF: 29200Sstevel@tonic-gate case CHUNK_ASCONF_ACK: 29210Sstevel@tonic-gate if (ch_len < sizeof (*ch)) { 29220Sstevel@tonic-gate return (0); 29230Sstevel@tonic-gate } 29240Sstevel@tonic-gate /* heartbeat data checked by process_heartbeat() */ 29250Sstevel@tonic-gate return (1); 29260Sstevel@tonic-gate case CHUNK_SHUTDOWN_COMPLETE: 29270Sstevel@tonic-gate { 29280Sstevel@tonic-gate ssize_t remlen = len; 29290Sstevel@tonic-gate 29300Sstevel@tonic-gate /* 29310Sstevel@tonic-gate * SHUTDOWN-COMPLETE chunk must not be bundled with any 29320Sstevel@tonic-gate * other 29330Sstevel@tonic-gate */ 29340Sstevel@tonic-gate if (!first || sctp_next_chunk(ch, &remlen) != NULL || 29350Sstevel@tonic-gate ch_len < sizeof (*ch)) { 29360Sstevel@tonic-gate return (0); 29370Sstevel@tonic-gate } 29380Sstevel@tonic-gate } 29390Sstevel@tonic-gate return (1); 29400Sstevel@tonic-gate case CHUNK_COOKIE: 29410Sstevel@tonic-gate case CHUNK_COOKIE_ACK: 29420Sstevel@tonic-gate case CHUNK_SHUTDOWN_ACK: 29430Sstevel@tonic-gate if (ch_len < sizeof (*ch) || !first) { 29440Sstevel@tonic-gate return (0); 29450Sstevel@tonic-gate } 29460Sstevel@tonic-gate return (1); 29470Sstevel@tonic-gate case CHUNK_FORWARD_TSN: 29480Sstevel@tonic-gate if (ch_len < (sizeof (*ch) + sizeof (uint32_t))) 29490Sstevel@tonic-gate return (0); 29500Sstevel@tonic-gate return (1); 29510Sstevel@tonic-gate default: 29520Sstevel@tonic-gate return (1); /* handled by strange_chunk() */ 29530Sstevel@tonic-gate } 29540Sstevel@tonic-gate 29550Sstevel@tonic-gate /* check and byteorder parameters */ 29560Sstevel@tonic-gate if (clen <= 0) { 29570Sstevel@tonic-gate return (1); 29580Sstevel@tonic-gate } 29590Sstevel@tonic-gate ASSERT(p != NULL); 29600Sstevel@tonic-gate 29610Sstevel@tonic-gate ph = p; 29620Sstevel@tonic-gate while (ph != NULL && clen > 0) { 29630Sstevel@tonic-gate ch_len = ntohs(ph->sph_len); 29640Sstevel@tonic-gate if (ch_len > len || ch_len < sizeof (*ph)) { 29650Sstevel@tonic-gate return (0); 29660Sstevel@tonic-gate } 29670Sstevel@tonic-gate ph = sctp_next_parm(ph, &clen); 29680Sstevel@tonic-gate } 29690Sstevel@tonic-gate 29700Sstevel@tonic-gate /* All OK */ 29710Sstevel@tonic-gate return (1); 29720Sstevel@tonic-gate } 29730Sstevel@tonic-gate 29740Sstevel@tonic-gate /* ARGSUSED */ 29750Sstevel@tonic-gate static sctp_hdr_t * 29760Sstevel@tonic-gate find_sctp_hdrs(mblk_t *mp, in6_addr_t *src, in6_addr_t *dst, 29770Sstevel@tonic-gate uint_t *ifindex, uint_t *ip_hdr_len, ip6_pkt_t *ipp, in_pktinfo_t *pinfo) 29780Sstevel@tonic-gate { 29790Sstevel@tonic-gate uchar_t *rptr; 29800Sstevel@tonic-gate ipha_t *ip4h; 29810Sstevel@tonic-gate ip6_t *ip6h; 29820Sstevel@tonic-gate mblk_t *mp1; 29830Sstevel@tonic-gate 29840Sstevel@tonic-gate rptr = mp->b_rptr; 29850Sstevel@tonic-gate if (IPH_HDR_VERSION(rptr) == IPV4_VERSION) { 29860Sstevel@tonic-gate *ip_hdr_len = IPH_HDR_LENGTH(rptr); 29870Sstevel@tonic-gate ip4h = (ipha_t *)rptr; 29880Sstevel@tonic-gate IN6_IPADDR_TO_V4MAPPED(ip4h->ipha_src, src); 29890Sstevel@tonic-gate IN6_IPADDR_TO_V4MAPPED(ip4h->ipha_dst, dst); 29900Sstevel@tonic-gate 29910Sstevel@tonic-gate ipp->ipp_fields |= IPPF_HOPLIMIT; 29920Sstevel@tonic-gate ipp->ipp_hoplimit = ((ipha_t *)rptr)->ipha_ttl; 29930Sstevel@tonic-gate if (pinfo != NULL && (pinfo->in_pkt_flags & IPF_RECVIF)) { 29940Sstevel@tonic-gate ipp->ipp_fields |= IPPF_IFINDEX; 29950Sstevel@tonic-gate ipp->ipp_ifindex = pinfo->in_pkt_ifindex; 29960Sstevel@tonic-gate } 29970Sstevel@tonic-gate } else { 29980Sstevel@tonic-gate ASSERT(IPH_HDR_VERSION(rptr) == IPV6_VERSION); 29990Sstevel@tonic-gate ip6h = (ip6_t *)rptr; 30000Sstevel@tonic-gate ipp->ipp_fields = IPPF_HOPLIMIT; 30010Sstevel@tonic-gate ipp->ipp_hoplimit = ip6h->ip6_hops; 30020Sstevel@tonic-gate 30030Sstevel@tonic-gate if (ip6h->ip6_nxt != IPPROTO_SCTP) { 30040Sstevel@tonic-gate /* Look for ifindex information */ 30050Sstevel@tonic-gate if (ip6h->ip6_nxt == IPPROTO_RAW) { 30060Sstevel@tonic-gate ip6i_t *ip6i = (ip6i_t *)ip6h; 30070Sstevel@tonic-gate 30080Sstevel@tonic-gate if (ip6i->ip6i_flags & IP6I_IFINDEX) { 30090Sstevel@tonic-gate ASSERT(ip6i->ip6i_ifindex != 0); 30100Sstevel@tonic-gate ipp->ipp_fields |= IPPF_IFINDEX; 30110Sstevel@tonic-gate ipp->ipp_ifindex = ip6i->ip6i_ifindex; 30120Sstevel@tonic-gate } 30130Sstevel@tonic-gate rptr = (uchar_t *)&ip6i[1]; 30140Sstevel@tonic-gate mp->b_rptr = rptr; 30150Sstevel@tonic-gate if (rptr == mp->b_wptr) { 30160Sstevel@tonic-gate mp1 = mp->b_cont; 30170Sstevel@tonic-gate freeb(mp); 30180Sstevel@tonic-gate mp = mp1; 30190Sstevel@tonic-gate rptr = mp->b_rptr; 30200Sstevel@tonic-gate } 30210Sstevel@tonic-gate ASSERT(mp->b_wptr - rptr >= 30220Sstevel@tonic-gate IPV6_HDR_LEN + sizeof (sctp_hdr_t)); 30230Sstevel@tonic-gate ip6h = (ip6_t *)rptr; 30240Sstevel@tonic-gate } 30250Sstevel@tonic-gate /* 30260Sstevel@tonic-gate * Find any potentially interesting extension headers 30270Sstevel@tonic-gate * as well as the length of the IPv6 + extension 30280Sstevel@tonic-gate * headers. 30290Sstevel@tonic-gate */ 30300Sstevel@tonic-gate *ip_hdr_len = ip_find_hdr_v6(mp, ip6h, ipp, NULL); 30310Sstevel@tonic-gate } else { 30320Sstevel@tonic-gate *ip_hdr_len = IPV6_HDR_LEN; 30330Sstevel@tonic-gate } 30340Sstevel@tonic-gate *src = ip6h->ip6_src; 30350Sstevel@tonic-gate *dst = ip6h->ip6_dst; 30360Sstevel@tonic-gate } 30370Sstevel@tonic-gate ASSERT((uintptr_t)(mp->b_wptr - rptr) <= (uintptr_t)INT_MAX); 30380Sstevel@tonic-gate return ((sctp_hdr_t *)&rptr[*ip_hdr_len]); 30390Sstevel@tonic-gate #undef IPVER 30400Sstevel@tonic-gate } 30410Sstevel@tonic-gate 30420Sstevel@tonic-gate static mblk_t * 30430Sstevel@tonic-gate sctp_check_in_policy(mblk_t *mp, mblk_t *ipsec_mp) 30440Sstevel@tonic-gate { 30450Sstevel@tonic-gate ipsec_in_t *ii; 30460Sstevel@tonic-gate boolean_t check = B_TRUE; 30470Sstevel@tonic-gate boolean_t policy_present; 30480Sstevel@tonic-gate ipha_t *ipha; 30490Sstevel@tonic-gate ip6_t *ip6h; 30500Sstevel@tonic-gate 30510Sstevel@tonic-gate ii = (ipsec_in_t *)ipsec_mp->b_rptr; 30520Sstevel@tonic-gate ASSERT(ii->ipsec_in_type == IPSEC_IN); 30530Sstevel@tonic-gate if (ii->ipsec_in_dont_check) { 30540Sstevel@tonic-gate check = B_FALSE; 30550Sstevel@tonic-gate if (!ii->ipsec_in_secure) { 30560Sstevel@tonic-gate freeb(ipsec_mp); 30570Sstevel@tonic-gate ipsec_mp = NULL; 30580Sstevel@tonic-gate } 30590Sstevel@tonic-gate } 30600Sstevel@tonic-gate if (IPH_HDR_VERSION(mp->b_rptr) == IPV4_VERSION) { 30610Sstevel@tonic-gate policy_present = ipsec_inbound_v4_policy_present; 30620Sstevel@tonic-gate ipha = (ipha_t *)mp->b_rptr; 30630Sstevel@tonic-gate ip6h = NULL; 30640Sstevel@tonic-gate } else { 30650Sstevel@tonic-gate policy_present = ipsec_inbound_v6_policy_present; 30660Sstevel@tonic-gate ipha = NULL; 30670Sstevel@tonic-gate ip6h = (ip6_t *)mp->b_rptr; 30680Sstevel@tonic-gate } 30690Sstevel@tonic-gate 30700Sstevel@tonic-gate if (check && policy_present) { 30710Sstevel@tonic-gate /* 30720Sstevel@tonic-gate * The conn_t parameter is NULL because we already know 30730Sstevel@tonic-gate * nobody's home. 30740Sstevel@tonic-gate */ 30750Sstevel@tonic-gate ipsec_mp = ipsec_check_global_policy(ipsec_mp, (conn_t *)NULL, 30760Sstevel@tonic-gate ipha, ip6h, B_TRUE); 30770Sstevel@tonic-gate if (ipsec_mp == NULL) 30780Sstevel@tonic-gate return (NULL); 30790Sstevel@tonic-gate } 30800Sstevel@tonic-gate if (ipsec_mp != NULL) 30810Sstevel@tonic-gate freeb(ipsec_mp); 30820Sstevel@tonic-gate return (mp); 30830Sstevel@tonic-gate } 30840Sstevel@tonic-gate 30850Sstevel@tonic-gate /* Handle out-of-the-blue packets */ 30860Sstevel@tonic-gate void 30870Sstevel@tonic-gate sctp_ootb_input(mblk_t *mp, ill_t *recv_ill, uint_t ipif_seqid, 30880Sstevel@tonic-gate zoneid_t zoneid, boolean_t mctl_present) 30890Sstevel@tonic-gate { 30900Sstevel@tonic-gate sctp_t *sctp; 30910Sstevel@tonic-gate sctp_chunk_hdr_t *ch; 30920Sstevel@tonic-gate sctp_hdr_t *sctph; 30930Sstevel@tonic-gate in6_addr_t src, dst; 30940Sstevel@tonic-gate uint_t ip_hdr_len; 30950Sstevel@tonic-gate uint_t ifindex; 30960Sstevel@tonic-gate ip6_pkt_t ipp; 30970Sstevel@tonic-gate ssize_t mlen; 30980Sstevel@tonic-gate in_pktinfo_t *pinfo = NULL; 30990Sstevel@tonic-gate mblk_t *first_mp; 31000Sstevel@tonic-gate 31010Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpOutOfBlue); 31020Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpInSCTPPkts); 31030Sstevel@tonic-gate 31040Sstevel@tonic-gate first_mp = mp; 31050Sstevel@tonic-gate if (mctl_present) 31060Sstevel@tonic-gate mp = mp->b_cont; 31070Sstevel@tonic-gate 31080Sstevel@tonic-gate /* Initiate IPPf processing, if needed. */ 31090Sstevel@tonic-gate if (IPP_ENABLED(IPP_LOCAL_IN)) { 31100Sstevel@tonic-gate ip_process(IPP_LOCAL_IN, &mp, 31110Sstevel@tonic-gate recv_ill->ill_phyint->phyint_ifindex); 31120Sstevel@tonic-gate if (mp == NULL) { 31130Sstevel@tonic-gate if (mctl_present) 31140Sstevel@tonic-gate freeb(first_mp); 31150Sstevel@tonic-gate return; 31160Sstevel@tonic-gate } 31170Sstevel@tonic-gate } 31180Sstevel@tonic-gate 31190Sstevel@tonic-gate if (mp->b_cont != NULL) { 31200Sstevel@tonic-gate /* 31210Sstevel@tonic-gate * All subsequent code is vastly simplified if it can 31220Sstevel@tonic-gate * assume a single contiguous chunk of data. 31230Sstevel@tonic-gate */ 31240Sstevel@tonic-gate if (pullupmsg(mp, -1) == 0) { 31250Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 31260Sstevel@tonic-gate freemsg(first_mp); 31270Sstevel@tonic-gate return; 31280Sstevel@tonic-gate } 31290Sstevel@tonic-gate } 31300Sstevel@tonic-gate 31310Sstevel@tonic-gate /* 31320Sstevel@tonic-gate * We don't really need to call this function... Need to 31330Sstevel@tonic-gate * optimize later. 31340Sstevel@tonic-gate */ 31350Sstevel@tonic-gate sctph = find_sctp_hdrs(mp, &src, &dst, &ifindex, &ip_hdr_len, 31360Sstevel@tonic-gate &ipp, pinfo); 31370Sstevel@tonic-gate mlen = mp->b_wptr - (uchar_t *)(sctph + 1); 31380Sstevel@tonic-gate if ((ch = sctp_first_chunk((uchar_t *)(sctph + 1), mlen)) == NULL) { 31390Sstevel@tonic-gate dprint(3, ("sctp_ootb_input: invalid packet\n")); 31400Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 31410Sstevel@tonic-gate freemsg(first_mp); 31420Sstevel@tonic-gate return; 31430Sstevel@tonic-gate } 31440Sstevel@tonic-gate 31450Sstevel@tonic-gate switch (ch->sch_id) { 31460Sstevel@tonic-gate case CHUNK_INIT: 31470Sstevel@tonic-gate /* no listener; send abort */ 31480Sstevel@tonic-gate if (mctl_present && sctp_check_in_policy(mp, first_mp) == NULL) 31490Sstevel@tonic-gate return; 31500Sstevel@tonic-gate sctp_send_abort(gsctp, sctp_init2vtag(ch), 0, 31510Sstevel@tonic-gate NULL, 0, mp, 0, B_TRUE); 31520Sstevel@tonic-gate break; 31530Sstevel@tonic-gate case CHUNK_INIT_ACK: 31540Sstevel@tonic-gate /* check for changed src addr */ 31550Sstevel@tonic-gate sctp = sctp_addrlist2sctp(mp, sctph, ch, ipif_seqid, zoneid); 31560Sstevel@tonic-gate if (sctp != NULL) { 31570Sstevel@tonic-gate /* success; proceed to normal path */ 31580Sstevel@tonic-gate mutex_enter(&sctp->sctp_lock); 31590Sstevel@tonic-gate if (sctp->sctp_running) { 31600Sstevel@tonic-gate if (!sctp_add_recvq(sctp, mp, B_FALSE)) { 31610Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 31620Sstevel@tonic-gate freemsg(mp); 31630Sstevel@tonic-gate } 31640Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 31650Sstevel@tonic-gate } else { 31660Sstevel@tonic-gate /* 31670Sstevel@tonic-gate * If the source address is changed, we 31680Sstevel@tonic-gate * don't need to worry too much about 31690Sstevel@tonic-gate * out of order processing. So we don't 31700Sstevel@tonic-gate * check if the recvq is empty or not here. 31710Sstevel@tonic-gate */ 31720Sstevel@tonic-gate sctp->sctp_running = B_TRUE; 31730Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 31740Sstevel@tonic-gate sctp_input_data(sctp, mp, NULL); 31750Sstevel@tonic-gate WAKE_SCTP(sctp); 31760Sstevel@tonic-gate sctp_process_sendq(sctp); 31770Sstevel@tonic-gate } 31780Sstevel@tonic-gate SCTP_REFRELE(sctp); 31790Sstevel@tonic-gate return; 31800Sstevel@tonic-gate } 31810Sstevel@tonic-gate if (mctl_present) 31820Sstevel@tonic-gate freeb(first_mp); 31830Sstevel@tonic-gate /* else bogus init ack; drop it */ 31840Sstevel@tonic-gate break; 31850Sstevel@tonic-gate case CHUNK_SHUTDOWN_ACK: 31860Sstevel@tonic-gate if (mctl_present && sctp_check_in_policy(mp, first_mp) == NULL) 31870Sstevel@tonic-gate return; 31880Sstevel@tonic-gate sctp_ootb_shutdown_ack(gsctp, mp, ip_hdr_len); 31890Sstevel@tonic-gate sctp_process_sendq(gsctp); 31900Sstevel@tonic-gate return; 31910Sstevel@tonic-gate case CHUNK_ERROR: 31920Sstevel@tonic-gate case CHUNK_ABORT: 31930Sstevel@tonic-gate case CHUNK_COOKIE_ACK: 31940Sstevel@tonic-gate case CHUNK_SHUTDOWN_COMPLETE: 31950Sstevel@tonic-gate if (mctl_present) 31960Sstevel@tonic-gate freeb(first_mp); 31970Sstevel@tonic-gate break; 31980Sstevel@tonic-gate default: 31990Sstevel@tonic-gate if (mctl_present && sctp_check_in_policy(mp, first_mp) == NULL) 32000Sstevel@tonic-gate return; 32010Sstevel@tonic-gate sctp_send_abort(gsctp, sctph->sh_verf, 0, NULL, 0, mp, 0, 32020Sstevel@tonic-gate B_TRUE); 32030Sstevel@tonic-gate break; 32040Sstevel@tonic-gate } 32050Sstevel@tonic-gate sctp_process_sendq(gsctp); 32060Sstevel@tonic-gate freemsg(mp); 32070Sstevel@tonic-gate } 32080Sstevel@tonic-gate 32090Sstevel@tonic-gate void 32100Sstevel@tonic-gate sctp_input(conn_t *connp, ipha_t *ipha, mblk_t *mp, mblk_t *first_mp, 32110Sstevel@tonic-gate ill_t *recv_ill, boolean_t isv4, boolean_t mctl_present) 32120Sstevel@tonic-gate { 32130Sstevel@tonic-gate sctp_t *sctp = CONN2SCTP(connp); 32140Sstevel@tonic-gate 32150Sstevel@tonic-gate /* 32160Sstevel@tonic-gate * We check some fields in conn_t without holding a lock. 32170Sstevel@tonic-gate * This should be fine. 32180Sstevel@tonic-gate */ 32190Sstevel@tonic-gate if (CONN_INBOUND_POLICY_PRESENT(connp) || mctl_present) { 32200Sstevel@tonic-gate first_mp = ipsec_check_inbound_policy(first_mp, connp, 32210Sstevel@tonic-gate ipha, NULL, mctl_present); 32220Sstevel@tonic-gate if (first_mp == NULL) { 32230Sstevel@tonic-gate SCTP_REFRELE(sctp); 32240Sstevel@tonic-gate return; 32250Sstevel@tonic-gate } 32260Sstevel@tonic-gate } 32270Sstevel@tonic-gate 32280Sstevel@tonic-gate /* Initiate IPPF processing for fastpath */ 32290Sstevel@tonic-gate if (IPP_ENABLED(IPP_LOCAL_IN)) { 32300Sstevel@tonic-gate ip_process(IPP_LOCAL_IN, &mp, 32310Sstevel@tonic-gate recv_ill->ill_phyint->phyint_ifindex); 32320Sstevel@tonic-gate if (mp == NULL) { 32330Sstevel@tonic-gate SCTP_REFRELE(sctp); 32340Sstevel@tonic-gate if (mctl_present) 32350Sstevel@tonic-gate freeb(first_mp); 32360Sstevel@tonic-gate return; 32370Sstevel@tonic-gate } else if (mctl_present) { 32380Sstevel@tonic-gate /* 32390Sstevel@tonic-gate * ip_process might return a new mp. 32400Sstevel@tonic-gate */ 32410Sstevel@tonic-gate ASSERT(first_mp != mp); 32420Sstevel@tonic-gate first_mp->b_cont = mp; 32430Sstevel@tonic-gate } else { 32440Sstevel@tonic-gate first_mp = mp; 32450Sstevel@tonic-gate } 32460Sstevel@tonic-gate } 32470Sstevel@tonic-gate 32480Sstevel@tonic-gate if (connp->conn_recvif || connp->conn_recvslla || 32490Sstevel@tonic-gate connp->conn_ipv6_recvpktinfo) { 32500Sstevel@tonic-gate int in_flags = 0; 32510Sstevel@tonic-gate 32520Sstevel@tonic-gate if (connp->conn_recvif || connp->conn_ipv6_recvpktinfo) { 32530Sstevel@tonic-gate in_flags = IPF_RECVIF; 32540Sstevel@tonic-gate } 32550Sstevel@tonic-gate if (connp->conn_recvslla) { 32560Sstevel@tonic-gate in_flags |= IPF_RECVSLLA; 32570Sstevel@tonic-gate } 32580Sstevel@tonic-gate if (isv4) { 32590Sstevel@tonic-gate mp = ip_add_info(mp, recv_ill, in_flags); 32600Sstevel@tonic-gate } else { 32610Sstevel@tonic-gate mp = ip_add_info_v6(mp, recv_ill, 32620Sstevel@tonic-gate &(((ip6_t *)ipha)->ip6_dst)); 32630Sstevel@tonic-gate } 32640Sstevel@tonic-gate if (mp == NULL) { 32650Sstevel@tonic-gate SCTP_REFRELE(sctp); 32660Sstevel@tonic-gate if (mctl_present) 32670Sstevel@tonic-gate freeb(first_mp); 32680Sstevel@tonic-gate return; 32690Sstevel@tonic-gate } else if (mctl_present) { 32700Sstevel@tonic-gate /* 32710Sstevel@tonic-gate * ip_add_info might return a new mp. 32720Sstevel@tonic-gate */ 32730Sstevel@tonic-gate ASSERT(first_mp != mp); 32740Sstevel@tonic-gate first_mp->b_cont = mp; 32750Sstevel@tonic-gate } else { 32760Sstevel@tonic-gate first_mp = mp; 32770Sstevel@tonic-gate } 32780Sstevel@tonic-gate } 32790Sstevel@tonic-gate 32800Sstevel@tonic-gate mutex_enter(&sctp->sctp_lock); 32810Sstevel@tonic-gate if (sctp->sctp_running) { 32820Sstevel@tonic-gate if (mctl_present) 32830Sstevel@tonic-gate mp->b_prev = first_mp; 32840Sstevel@tonic-gate if (!sctp_add_recvq(sctp, mp, B_FALSE)) { 32850Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 32860Sstevel@tonic-gate freemsg(first_mp); 32870Sstevel@tonic-gate } 32880Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 32890Sstevel@tonic-gate SCTP_REFRELE(sctp); 32900Sstevel@tonic-gate return; 32910Sstevel@tonic-gate } else { 32920Sstevel@tonic-gate sctp->sctp_running = B_TRUE; 32930Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 32940Sstevel@tonic-gate 32950Sstevel@tonic-gate mutex_enter(&sctp->sctp_recvq_lock); 32960Sstevel@tonic-gate if (sctp->sctp_recvq != NULL) { 32970Sstevel@tonic-gate if (mctl_present) 32980Sstevel@tonic-gate mp->b_prev = first_mp; 32990Sstevel@tonic-gate if (!sctp_add_recvq(sctp, mp, B_TRUE)) { 33000Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 33010Sstevel@tonic-gate freemsg(first_mp); 33020Sstevel@tonic-gate } 33030Sstevel@tonic-gate mutex_exit(&sctp->sctp_recvq_lock); 33040Sstevel@tonic-gate WAKE_SCTP(sctp); 33050Sstevel@tonic-gate SCTP_REFRELE(sctp); 33060Sstevel@tonic-gate return; 33070Sstevel@tonic-gate } 33080Sstevel@tonic-gate } 33090Sstevel@tonic-gate mutex_exit(&sctp->sctp_recvq_lock); 33100Sstevel@tonic-gate sctp_input_data(sctp, mp, (mctl_present ? first_mp : NULL)); 33110Sstevel@tonic-gate WAKE_SCTP(sctp); 33120Sstevel@tonic-gate sctp_process_sendq(sctp); 33130Sstevel@tonic-gate SCTP_REFRELE(sctp); 33140Sstevel@tonic-gate } 33150Sstevel@tonic-gate 33160Sstevel@tonic-gate static void 33170Sstevel@tonic-gate sctp_process_abort(sctp_t *sctp, sctp_chunk_hdr_t *ch, int err) 33180Sstevel@tonic-gate { 33190Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpAborted); 33200Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 33210Sstevel@tonic-gate 33220Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_LOST, 33230Sstevel@tonic-gate ntohs(((sctp_parm_hdr_t *)(ch + 1))->sph_type), ch); 33240Sstevel@tonic-gate sctp_clean_death(sctp, err); 33250Sstevel@tonic-gate } 33260Sstevel@tonic-gate 33270Sstevel@tonic-gate void 33280Sstevel@tonic-gate sctp_input_data(sctp_t *sctp, mblk_t *mp, mblk_t *ipsec_mp) 33290Sstevel@tonic-gate { 33300Sstevel@tonic-gate sctp_chunk_hdr_t *ch; 33310Sstevel@tonic-gate ssize_t mlen; 33320Sstevel@tonic-gate int gotdata; 33330Sstevel@tonic-gate int trysend; 33340Sstevel@tonic-gate sctp_faddr_t *fp; 33350Sstevel@tonic-gate sctp_init_chunk_t *iack; 33360Sstevel@tonic-gate uint32_t tsn; 33370Sstevel@tonic-gate sctp_data_hdr_t *sdc; 33380Sstevel@tonic-gate ip6_pkt_t ipp; 33390Sstevel@tonic-gate in6_addr_t src; 33400Sstevel@tonic-gate in6_addr_t dst; 33410Sstevel@tonic-gate uint_t ifindex; 33420Sstevel@tonic-gate sctp_hdr_t *sctph; 33430Sstevel@tonic-gate uint_t ip_hdr_len; 33440Sstevel@tonic-gate mblk_t *dups = NULL; 33450Sstevel@tonic-gate int recv_adaption; 33460Sstevel@tonic-gate boolean_t wake_eager = B_FALSE; 33470Sstevel@tonic-gate mblk_t *pinfo_mp; 33480Sstevel@tonic-gate in_pktinfo_t *pinfo = NULL; 33490Sstevel@tonic-gate in6_addr_t peer_src; 33500Sstevel@tonic-gate int64_t now; 33510Sstevel@tonic-gate 33520Sstevel@tonic-gate if (DB_TYPE(mp) != M_DATA) { 33530Sstevel@tonic-gate ASSERT(DB_TYPE(mp) == M_CTL); 33540Sstevel@tonic-gate if (MBLKL(mp) == sizeof (in_pktinfo_t) && 33550Sstevel@tonic-gate ((in_pktinfo_t *)mp->b_rptr)->in_pkt_ulp_type == 33560Sstevel@tonic-gate IN_PKTINFO) { 33570Sstevel@tonic-gate pinfo = (in_pktinfo_t *)mp->b_rptr; 33580Sstevel@tonic-gate pinfo_mp = mp; 33590Sstevel@tonic-gate mp = mp->b_cont; 33600Sstevel@tonic-gate } else { 33610Sstevel@tonic-gate if (ipsec_mp != NULL) 33620Sstevel@tonic-gate freeb(ipsec_mp); 33630Sstevel@tonic-gate sctp_icmp_error(sctp, mp); 33640Sstevel@tonic-gate return; 33650Sstevel@tonic-gate } 33660Sstevel@tonic-gate } 33670Sstevel@tonic-gate ASSERT(DB_TYPE(mp) == M_DATA); 33680Sstevel@tonic-gate 33690Sstevel@tonic-gate if (mp->b_cont != NULL) { 33700Sstevel@tonic-gate /* 33710Sstevel@tonic-gate * All subsequent code is vastly simplified if it can 33720Sstevel@tonic-gate * assume a single contiguous chunk of data. 33730Sstevel@tonic-gate */ 33740Sstevel@tonic-gate if (pullupmsg(mp, -1) == 0) { 33750Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 33760Sstevel@tonic-gate if (ipsec_mp != NULL) 33770Sstevel@tonic-gate freeb(ipsec_mp); 33780Sstevel@tonic-gate if (pinfo != NULL) 33790Sstevel@tonic-gate freeb(pinfo_mp); 33800Sstevel@tonic-gate freemsg(mp); 33810Sstevel@tonic-gate return; 33820Sstevel@tonic-gate } 33830Sstevel@tonic-gate } 33840Sstevel@tonic-gate 33850Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ipkts); 33860Sstevel@tonic-gate sctph = find_sctp_hdrs(mp, &src, &dst, &ifindex, &ip_hdr_len, 33870Sstevel@tonic-gate &ipp, pinfo); 33880Sstevel@tonic-gate if (pinfo != NULL) 33890Sstevel@tonic-gate freeb(pinfo_mp); 33900Sstevel@tonic-gate mlen = mp->b_wptr - (uchar_t *)(sctph + 1); 33910Sstevel@tonic-gate ch = sctp_first_chunk((uchar_t *)(sctph + 1), mlen); 33920Sstevel@tonic-gate if (ch == NULL) { 33930Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 33940Sstevel@tonic-gate if (ipsec_mp != NULL) 33950Sstevel@tonic-gate freeb(ipsec_mp); 33960Sstevel@tonic-gate freemsg(mp); 33970Sstevel@tonic-gate return; 33980Sstevel@tonic-gate } 33990Sstevel@tonic-gate 34000Sstevel@tonic-gate if (!sctp_check_input(sctp, ch, mlen, 1)) { 34010Sstevel@tonic-gate BUMP_MIB(&ip_mib, ipInDiscards); 34020Sstevel@tonic-gate goto done; 34030Sstevel@tonic-gate } 34040Sstevel@tonic-gate /* 34050Sstevel@tonic-gate * Check verfication tag (special handling for INIT, 34060Sstevel@tonic-gate * COOKIE, SHUTDOWN_COMPLETE and SHUTDOWN_ACK chunks). 34070Sstevel@tonic-gate * ABORTs are handled in the chunk processing loop, since 34080Sstevel@tonic-gate * may not appear first. All other checked chunks must 34090Sstevel@tonic-gate * appear first, or will have been dropped by check_input(). 34100Sstevel@tonic-gate */ 34110Sstevel@tonic-gate switch (ch->sch_id) { 34120Sstevel@tonic-gate case CHUNK_INIT: 34130Sstevel@tonic-gate if (sctph->sh_verf != 0) { 34140Sstevel@tonic-gate /* drop it */ 34150Sstevel@tonic-gate goto done; 34160Sstevel@tonic-gate } 34170Sstevel@tonic-gate break; 34180Sstevel@tonic-gate case CHUNK_SHUTDOWN_COMPLETE: 34190Sstevel@tonic-gate if (sctph->sh_verf == sctp->sctp_lvtag) 34200Sstevel@tonic-gate break; 34210Sstevel@tonic-gate if (sctph->sh_verf == sctp->sctp_fvtag && 34220Sstevel@tonic-gate SCTP_GET_TBIT(ch)) { 34230Sstevel@tonic-gate break; 34240Sstevel@tonic-gate } 34250Sstevel@tonic-gate /* else drop it */ 34260Sstevel@tonic-gate goto done; 34270Sstevel@tonic-gate case CHUNK_ABORT: 34280Sstevel@tonic-gate case CHUNK_COOKIE: 34290Sstevel@tonic-gate /* handled below */ 34300Sstevel@tonic-gate break; 34310Sstevel@tonic-gate case CHUNK_SHUTDOWN_ACK: 34320Sstevel@tonic-gate if (sctp->sctp_state > SCTPS_BOUND && 34330Sstevel@tonic-gate sctp->sctp_state < SCTPS_ESTABLISHED) { 34340Sstevel@tonic-gate /* treat as OOTB */ 34350Sstevel@tonic-gate sctp_ootb_shutdown_ack(sctp, mp, ip_hdr_len); 34360Sstevel@tonic-gate if (ipsec_mp != NULL) 34370Sstevel@tonic-gate freeb(ipsec_mp); 34380Sstevel@tonic-gate return; 34390Sstevel@tonic-gate } 34400Sstevel@tonic-gate /* else fallthru */ 34410Sstevel@tonic-gate default: 34420Sstevel@tonic-gate /* 34430Sstevel@tonic-gate * All other packets must have a valid 34440Sstevel@tonic-gate * verification tag, however if this is a 34450Sstevel@tonic-gate * listener, we use a refined version of 34460Sstevel@tonic-gate * out-of-the-blue logic. 34470Sstevel@tonic-gate */ 34480Sstevel@tonic-gate if (sctph->sh_verf != sctp->sctp_lvtag && 34490Sstevel@tonic-gate sctp->sctp_state != SCTPS_LISTEN) { 34500Sstevel@tonic-gate /* drop it */ 34510Sstevel@tonic-gate goto done; 34520Sstevel@tonic-gate } 34530Sstevel@tonic-gate break; 34540Sstevel@tonic-gate } 34550Sstevel@tonic-gate 34560Sstevel@tonic-gate /* Have a valid sctp for this packet */ 34570Sstevel@tonic-gate fp = sctp_lookup_faddr(sctp, &src); 3458*1676Sjpk dprint(2, ("sctp_dispatch_rput: mp=%p fp=%p sctp=%p\n", (void *)mp, 3459*1676Sjpk (void *)fp, (void *)sctp)); 34600Sstevel@tonic-gate 34610Sstevel@tonic-gate gotdata = 0; 34620Sstevel@tonic-gate trysend = 0; 34630Sstevel@tonic-gate 34640Sstevel@tonic-gate now = lbolt64; 34650Sstevel@tonic-gate /* Process the chunks */ 34660Sstevel@tonic-gate do { 34670Sstevel@tonic-gate dprint(3, ("sctp_dispatch_rput: state=%d, chunk id=%d\n", 34680Sstevel@tonic-gate sctp->sctp_state, (int)(ch->sch_id))); 34690Sstevel@tonic-gate 34700Sstevel@tonic-gate if (ch->sch_id == CHUNK_ABORT) { 34710Sstevel@tonic-gate if (sctph->sh_verf != sctp->sctp_lvtag && 34720Sstevel@tonic-gate sctph->sh_verf != sctp->sctp_fvtag) { 34730Sstevel@tonic-gate /* drop it */ 34740Sstevel@tonic-gate goto done; 34750Sstevel@tonic-gate } 34760Sstevel@tonic-gate } 34770Sstevel@tonic-gate 34780Sstevel@tonic-gate switch (sctp->sctp_state) { 34790Sstevel@tonic-gate 34800Sstevel@tonic-gate case SCTPS_ESTABLISHED: 34810Sstevel@tonic-gate case SCTPS_SHUTDOWN_PENDING: 34820Sstevel@tonic-gate case SCTPS_SHUTDOWN_SENT: 34830Sstevel@tonic-gate switch (ch->sch_id) { 34840Sstevel@tonic-gate case CHUNK_DATA: 34850Sstevel@tonic-gate /* 0-length data chunks are not allowed */ 34860Sstevel@tonic-gate if (ntohs(ch->sch_len) == sizeof (*sdc)) { 34870Sstevel@tonic-gate sdc = (sctp_data_hdr_t *)ch; 34880Sstevel@tonic-gate tsn = sdc->sdh_tsn; 34890Sstevel@tonic-gate sctp_send_abort(sctp, sctp->sctp_fvtag, 34900Sstevel@tonic-gate SCTP_ERR_NO_USR_DATA, (char *)&tsn, 34910Sstevel@tonic-gate sizeof (tsn), mp, 0, B_FALSE); 34920Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_LOST, 34930Sstevel@tonic-gate 0, NULL); 34940Sstevel@tonic-gate sctp_clean_death(sctp, ECONNABORTED); 34950Sstevel@tonic-gate goto done; 34960Sstevel@tonic-gate } 34970Sstevel@tonic-gate 34980Sstevel@tonic-gate ASSERT(fp != NULL); 34990Sstevel@tonic-gate sctp->sctp_lastdata = fp; 35000Sstevel@tonic-gate sctp_data_chunk(sctp, ch, mp, &dups, fp, &ipp); 35010Sstevel@tonic-gate gotdata = 1; 35020Sstevel@tonic-gate /* Restart shutdown timer if shutting down */ 35030Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_SENT) { 35040Sstevel@tonic-gate /* 35050Sstevel@tonic-gate * If we have exceeded our max 35060Sstevel@tonic-gate * wait bound for waiting for a 35070Sstevel@tonic-gate * shutdown ack from the peer, 35080Sstevel@tonic-gate * abort the association. 35090Sstevel@tonic-gate */ 35100Sstevel@tonic-gate if (sctp_shutack_wait_bound != 0 && 35110Sstevel@tonic-gate TICK_TO_MSEC(now - 35120Sstevel@tonic-gate sctp->sctp_out_time) > 35130Sstevel@tonic-gate sctp_shutack_wait_bound) { 35140Sstevel@tonic-gate sctp_send_abort(sctp, 35150Sstevel@tonic-gate sctp->sctp_fvtag, 0, NULL, 35160Sstevel@tonic-gate 0, mp, 0, B_FALSE); 35170Sstevel@tonic-gate sctp_assoc_event(sctp, 35180Sstevel@tonic-gate SCTP_COMM_LOST, 0, NULL); 35190Sstevel@tonic-gate sctp_clean_death(sctp, 35200Sstevel@tonic-gate ECONNABORTED); 35210Sstevel@tonic-gate goto done; 35220Sstevel@tonic-gate } 35230Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, 35240Sstevel@tonic-gate fp->rto); 35250Sstevel@tonic-gate } 35260Sstevel@tonic-gate break; 35270Sstevel@tonic-gate case CHUNK_SACK: 35280Sstevel@tonic-gate ASSERT(fp != NULL); 35290Sstevel@tonic-gate /* 35300Sstevel@tonic-gate * Peer is real and alive if it can ack our 35310Sstevel@tonic-gate * data. 35320Sstevel@tonic-gate */ 35330Sstevel@tonic-gate sctp_faddr_alive(sctp, fp); 35340Sstevel@tonic-gate trysend = sctp_got_sack(sctp, ch); 3535852Svi117747 if (trysend < 0) { 3536852Svi117747 sctp_send_abort(sctp, sctph->sh_verf, 3537852Svi117747 0, NULL, 0, mp, 0, B_FALSE); 3538852Svi117747 sctp_assoc_event(sctp, 3539852Svi117747 SCTP_COMM_LOST, 0, NULL); 3540852Svi117747 sctp_clean_death(sctp, 3541852Svi117747 ECONNABORTED); 3542852Svi117747 goto done; 3543852Svi117747 } 35440Sstevel@tonic-gate break; 35450Sstevel@tonic-gate case CHUNK_HEARTBEAT: 35460Sstevel@tonic-gate sctp_return_heartbeat(sctp, ch, mp); 35470Sstevel@tonic-gate break; 35480Sstevel@tonic-gate case CHUNK_HEARTBEAT_ACK: 35490Sstevel@tonic-gate sctp_process_heartbeat(sctp, ch); 35500Sstevel@tonic-gate break; 35510Sstevel@tonic-gate case CHUNK_SHUTDOWN: 35520Sstevel@tonic-gate sctp_shutdown_event(sctp); 35530Sstevel@tonic-gate trysend = sctp_shutdown_received(sctp, ch, 35540Sstevel@tonic-gate 0, 0); 35550Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 35560Sstevel@tonic-gate break; 35570Sstevel@tonic-gate case CHUNK_SHUTDOWN_ACK: 35580Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 35590Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_SENT) { 35600Sstevel@tonic-gate sctp_shutdown_complete(sctp); 35610Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpShutdowns); 35620Sstevel@tonic-gate sctp_assoc_event(sctp, 35630Sstevel@tonic-gate SCTP_SHUTDOWN_COMP, 0, NULL); 35640Sstevel@tonic-gate sctp_clean_death(sctp, 0); 35650Sstevel@tonic-gate goto done; 35660Sstevel@tonic-gate } 35670Sstevel@tonic-gate break; 35680Sstevel@tonic-gate case CHUNK_ABORT: { 35690Sstevel@tonic-gate sctp_saddr_ipif_t *sp; 35700Sstevel@tonic-gate 35710Sstevel@tonic-gate /* Ignore if delete pending */ 3572852Svi117747 sp = sctp_saddr_lookup(sctp, &dst, 0); 35730Sstevel@tonic-gate ASSERT(sp != NULL); 35740Sstevel@tonic-gate if (sp->saddr_ipif_delete_pending) { 35750Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 35760Sstevel@tonic-gate break; 35770Sstevel@tonic-gate } 35780Sstevel@tonic-gate 35790Sstevel@tonic-gate sctp_process_abort(sctp, ch, ECONNRESET); 35800Sstevel@tonic-gate goto done; 35810Sstevel@tonic-gate } 35820Sstevel@tonic-gate case CHUNK_INIT: 35830Sstevel@tonic-gate sctp_send_initack(sctp, ch, mp); 35840Sstevel@tonic-gate break; 35850Sstevel@tonic-gate case CHUNK_COOKIE: 35860Sstevel@tonic-gate if (sctp_process_cookie(sctp, ch, mp, &iack, 35870Sstevel@tonic-gate sctph, &recv_adaption, NULL) != -1) { 35880Sstevel@tonic-gate sctp_send_cookie_ack(sctp); 35890Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_RESTART, 35900Sstevel@tonic-gate 0, NULL); 35910Sstevel@tonic-gate if (recv_adaption) { 35920Sstevel@tonic-gate sctp->sctp_recv_adaption = 1; 35930Sstevel@tonic-gate sctp_adaption_event(sctp); 35940Sstevel@tonic-gate } 35950Sstevel@tonic-gate } else { 35960Sstevel@tonic-gate BUMP_MIB(&sctp_mib, 35970Sstevel@tonic-gate sctpInInvalidCookie); 35980Sstevel@tonic-gate } 35990Sstevel@tonic-gate break; 36000Sstevel@tonic-gate case CHUNK_ERROR: { 36010Sstevel@tonic-gate int error; 36020Sstevel@tonic-gate 36030Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 36040Sstevel@tonic-gate error = sctp_handle_error(sctp, sctph, ch, mp); 36050Sstevel@tonic-gate if (error != 0) { 36060Sstevel@tonic-gate sctp_clean_death(sctp, error); 36070Sstevel@tonic-gate goto done; 36080Sstevel@tonic-gate } 36090Sstevel@tonic-gate break; 36100Sstevel@tonic-gate } 36110Sstevel@tonic-gate case CHUNK_ASCONF: 36120Sstevel@tonic-gate ASSERT(fp != NULL); 36130Sstevel@tonic-gate sctp_input_asconf(sctp, ch, fp); 36140Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 36150Sstevel@tonic-gate break; 36160Sstevel@tonic-gate case CHUNK_ASCONF_ACK: 36170Sstevel@tonic-gate ASSERT(fp != NULL); 36180Sstevel@tonic-gate sctp_faddr_alive(sctp, fp); 36190Sstevel@tonic-gate sctp_input_asconf_ack(sctp, ch, fp); 36200Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 36210Sstevel@tonic-gate break; 36220Sstevel@tonic-gate case CHUNK_FORWARD_TSN: 36230Sstevel@tonic-gate ASSERT(fp != NULL); 36240Sstevel@tonic-gate sctp->sctp_lastdata = fp; 36250Sstevel@tonic-gate sctp_process_forward_tsn(sctp, ch, fp, &ipp); 36260Sstevel@tonic-gate gotdata = 1; 36270Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 36280Sstevel@tonic-gate break; 36290Sstevel@tonic-gate default: 36300Sstevel@tonic-gate if (sctp_strange_chunk(sctp, ch, fp) == 0) { 36310Sstevel@tonic-gate goto nomorechunks; 36320Sstevel@tonic-gate } /* else skip and continue processing */ 36330Sstevel@tonic-gate break; 36340Sstevel@tonic-gate } 36350Sstevel@tonic-gate break; 36360Sstevel@tonic-gate 36370Sstevel@tonic-gate case SCTPS_LISTEN: 36380Sstevel@tonic-gate switch (ch->sch_id) { 36390Sstevel@tonic-gate case CHUNK_INIT: 36400Sstevel@tonic-gate sctp_send_initack(sctp, ch, mp); 36410Sstevel@tonic-gate break; 36420Sstevel@tonic-gate case CHUNK_COOKIE: { 36430Sstevel@tonic-gate sctp_t *eager; 36440Sstevel@tonic-gate 36450Sstevel@tonic-gate if (sctp_process_cookie(sctp, ch, mp, &iack, 36460Sstevel@tonic-gate sctph, &recv_adaption, &peer_src) == -1) { 36470Sstevel@tonic-gate BUMP_MIB(&sctp_mib, 36480Sstevel@tonic-gate sctpInInvalidCookie); 36490Sstevel@tonic-gate goto done; 36500Sstevel@tonic-gate } 36510Sstevel@tonic-gate 36520Sstevel@tonic-gate /* 36530Sstevel@tonic-gate * The cookie is good; ensure that 36540Sstevel@tonic-gate * the peer used the verification 36550Sstevel@tonic-gate * tag from the init ack in the header. 36560Sstevel@tonic-gate */ 36570Sstevel@tonic-gate if (iack->sic_inittag != sctph->sh_verf) 36580Sstevel@tonic-gate goto done; 36590Sstevel@tonic-gate 36600Sstevel@tonic-gate eager = sctp_conn_request(sctp, mp, ifindex, 36610Sstevel@tonic-gate ip_hdr_len, iack, ipsec_mp); 36620Sstevel@tonic-gate if (eager == NULL) { 36630Sstevel@tonic-gate sctp_send_abort(sctp, sctph->sh_verf, 36640Sstevel@tonic-gate SCTP_ERR_NO_RESOURCES, NULL, 0, mp, 36650Sstevel@tonic-gate 0, B_FALSE); 36660Sstevel@tonic-gate goto done; 36670Sstevel@tonic-gate } 36680Sstevel@tonic-gate 36690Sstevel@tonic-gate /* 36700Sstevel@tonic-gate * If there were extra chunks 36710Sstevel@tonic-gate * bundled with the cookie, 36720Sstevel@tonic-gate * they must be processed 36730Sstevel@tonic-gate * on the eager's queue. We 36740Sstevel@tonic-gate * accomplish this by refeeding 36750Sstevel@tonic-gate * the whole packet into the 36760Sstevel@tonic-gate * state machine on the right 36770Sstevel@tonic-gate * q. The packet (mp) gets 36780Sstevel@tonic-gate * there via the eager's 36790Sstevel@tonic-gate * cookie_mp field (overloaded 36800Sstevel@tonic-gate * with the active open role). 36810Sstevel@tonic-gate * This is picked up when 36820Sstevel@tonic-gate * processing the null bind 36830Sstevel@tonic-gate * request put on the eager's 36840Sstevel@tonic-gate * q by sctp_accept(). We must 36850Sstevel@tonic-gate * first revert the cookie 36860Sstevel@tonic-gate * chunk's length field to network 36870Sstevel@tonic-gate * byteorder so it can be 36880Sstevel@tonic-gate * properly reprocessed on the 36890Sstevel@tonic-gate * eager's queue. 36900Sstevel@tonic-gate */ 36910Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpPassiveEstab); 36920Sstevel@tonic-gate if (mlen > ntohs(ch->sch_len)) { 36930Sstevel@tonic-gate eager->sctp_cookie_mp = dupb(mp); 3694*1676Sjpk mblk_setcred(eager->sctp_cookie_mp, 3695*1676Sjpk CONN_CRED(eager->sctp_connp)); 36960Sstevel@tonic-gate /* 36970Sstevel@tonic-gate * If no mem, just let 36980Sstevel@tonic-gate * the peer retransmit. 36990Sstevel@tonic-gate */ 37000Sstevel@tonic-gate } 37010Sstevel@tonic-gate sctp_assoc_event(eager, SCTP_COMM_UP, 0, NULL); 37020Sstevel@tonic-gate if (recv_adaption) { 37030Sstevel@tonic-gate eager->sctp_recv_adaption = 1; 37040Sstevel@tonic-gate eager->sctp_rx_adaption_code = 37050Sstevel@tonic-gate sctp->sctp_rx_adaption_code; 37060Sstevel@tonic-gate sctp_adaption_event(eager); 37070Sstevel@tonic-gate } 37080Sstevel@tonic-gate 37090Sstevel@tonic-gate eager->sctp_active = now; 37100Sstevel@tonic-gate sctp_send_cookie_ack(eager); 37110Sstevel@tonic-gate 37120Sstevel@tonic-gate wake_eager = B_TRUE; 37130Sstevel@tonic-gate 37140Sstevel@tonic-gate /* 37150Sstevel@tonic-gate * Process rest of the chunks with eager. 37160Sstevel@tonic-gate */ 37170Sstevel@tonic-gate sctp = eager; 37180Sstevel@tonic-gate fp = sctp_lookup_faddr(sctp, &peer_src); 37190Sstevel@tonic-gate /* 37200Sstevel@tonic-gate * Confirm peer's original source. fp can 37210Sstevel@tonic-gate * only be NULL if peer does not use the 37220Sstevel@tonic-gate * original source as one of its addresses... 37230Sstevel@tonic-gate */ 37240Sstevel@tonic-gate if (fp == NULL) 37250Sstevel@tonic-gate fp = sctp_lookup_faddr(sctp, &src); 37260Sstevel@tonic-gate else 37270Sstevel@tonic-gate sctp_faddr_alive(sctp, fp); 37280Sstevel@tonic-gate 37290Sstevel@tonic-gate /* 37300Sstevel@tonic-gate * Validate the peer addresses. It also starts 37310Sstevel@tonic-gate * the heartbeat timer. 37320Sstevel@tonic-gate */ 37330Sstevel@tonic-gate sctp_validate_peer(sctp); 37340Sstevel@tonic-gate break; 37350Sstevel@tonic-gate } 37360Sstevel@tonic-gate /* Anything else is considered out-of-the-blue */ 37370Sstevel@tonic-gate case CHUNK_ERROR: 37380Sstevel@tonic-gate case CHUNK_ABORT: 37390Sstevel@tonic-gate case CHUNK_COOKIE_ACK: 37400Sstevel@tonic-gate case CHUNK_SHUTDOWN_COMPLETE: 37410Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 37420Sstevel@tonic-gate goto done; 37430Sstevel@tonic-gate default: 37440Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 37450Sstevel@tonic-gate sctp_send_abort(sctp, sctph->sh_verf, 0, NULL, 37460Sstevel@tonic-gate 0, mp, 0, B_TRUE); 37470Sstevel@tonic-gate goto done; 37480Sstevel@tonic-gate } 37490Sstevel@tonic-gate break; 37500Sstevel@tonic-gate 37510Sstevel@tonic-gate case SCTPS_COOKIE_WAIT: 37520Sstevel@tonic-gate switch (ch->sch_id) { 37530Sstevel@tonic-gate case CHUNK_INIT_ACK: 37540Sstevel@tonic-gate sctp_stop_faddr_timers(sctp); 37550Sstevel@tonic-gate sctp_faddr_alive(sctp, sctp->sctp_current); 37560Sstevel@tonic-gate sctp_send_cookie_echo(sctp, ch, mp); 37570Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 37580Sstevel@tonic-gate break; 37590Sstevel@tonic-gate case CHUNK_ABORT: 37600Sstevel@tonic-gate sctp_process_abort(sctp, ch, ECONNREFUSED); 37610Sstevel@tonic-gate goto done; 37620Sstevel@tonic-gate case CHUNK_INIT: 37630Sstevel@tonic-gate sctp_send_initack(sctp, ch, mp); 37640Sstevel@tonic-gate break; 37650Sstevel@tonic-gate case CHUNK_COOKIE: 37660Sstevel@tonic-gate if (sctp_process_cookie(sctp, ch, mp, &iack, 37670Sstevel@tonic-gate sctph, &recv_adaption, NULL) == -1) { 37680Sstevel@tonic-gate BUMP_MIB(&sctp_mib, 37690Sstevel@tonic-gate sctpInInvalidCookie); 37700Sstevel@tonic-gate break; 37710Sstevel@tonic-gate } 37720Sstevel@tonic-gate sctp_send_cookie_ack(sctp); 37730Sstevel@tonic-gate sctp_stop_faddr_timers(sctp); 37740Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) { 37750Sstevel@tonic-gate sctp->sctp_ulp_connected(sctp->sctp_ulpd); 37760Sstevel@tonic-gate sctp_set_ulp_prop(sctp); 37770Sstevel@tonic-gate } 37780Sstevel@tonic-gate sctp->sctp_state = SCTPS_ESTABLISHED; 37790Sstevel@tonic-gate sctp->sctp_assoc_start_time = (uint32_t)lbolt; 37800Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpActiveEstab); 37810Sstevel@tonic-gate if (sctp->sctp_cookie_mp) { 37820Sstevel@tonic-gate freemsg(sctp->sctp_cookie_mp); 37830Sstevel@tonic-gate sctp->sctp_cookie_mp = NULL; 37840Sstevel@tonic-gate } 37850Sstevel@tonic-gate 37860Sstevel@tonic-gate /* Validate the peer addresses. */ 37870Sstevel@tonic-gate sctp->sctp_active = now; 37880Sstevel@tonic-gate sctp_validate_peer(sctp); 37890Sstevel@tonic-gate 37900Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_UP, 0, NULL); 37910Sstevel@tonic-gate if (recv_adaption) { 37920Sstevel@tonic-gate sctp->sctp_recv_adaption = 1; 37930Sstevel@tonic-gate sctp_adaption_event(sctp); 37940Sstevel@tonic-gate } 37950Sstevel@tonic-gate /* Try sending queued data, or ASCONFs */ 37960Sstevel@tonic-gate trysend = 1; 37970Sstevel@tonic-gate break; 37980Sstevel@tonic-gate default: 37990Sstevel@tonic-gate if (sctp_strange_chunk(sctp, ch, fp) == 0) { 38000Sstevel@tonic-gate goto nomorechunks; 38010Sstevel@tonic-gate } /* else skip and continue processing */ 38020Sstevel@tonic-gate break; 38030Sstevel@tonic-gate } 38040Sstevel@tonic-gate break; 38050Sstevel@tonic-gate 38060Sstevel@tonic-gate case SCTPS_COOKIE_ECHOED: 38070Sstevel@tonic-gate switch (ch->sch_id) { 38080Sstevel@tonic-gate case CHUNK_COOKIE_ACK: 38090Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) { 38100Sstevel@tonic-gate sctp->sctp_ulp_connected(sctp->sctp_ulpd); 38110Sstevel@tonic-gate sctp_set_ulp_prop(sctp); 38120Sstevel@tonic-gate } 38130Sstevel@tonic-gate if (sctp->sctp_unacked == 0) 38140Sstevel@tonic-gate sctp_stop_faddr_timers(sctp); 38150Sstevel@tonic-gate sctp->sctp_state = SCTPS_ESTABLISHED; 38160Sstevel@tonic-gate sctp->sctp_assoc_start_time = (uint32_t)lbolt; 38170Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpActiveEstab); 38180Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 38190Sstevel@tonic-gate if (sctp->sctp_cookie_mp) { 38200Sstevel@tonic-gate freemsg(sctp->sctp_cookie_mp); 38210Sstevel@tonic-gate sctp->sctp_cookie_mp = NULL; 38220Sstevel@tonic-gate } 38230Sstevel@tonic-gate sctp_faddr_alive(sctp, fp); 38240Sstevel@tonic-gate /* Validate the peer addresses. */ 38250Sstevel@tonic-gate sctp->sctp_active = now; 38260Sstevel@tonic-gate sctp_validate_peer(sctp); 38270Sstevel@tonic-gate 38280Sstevel@tonic-gate /* Try sending queued data, or ASCONFs */ 38290Sstevel@tonic-gate trysend = 1; 38300Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_UP, 0, NULL); 38310Sstevel@tonic-gate sctp_adaption_event(sctp); 38320Sstevel@tonic-gate break; 38330Sstevel@tonic-gate case CHUNK_ABORT: 38340Sstevel@tonic-gate sctp_process_abort(sctp, ch, ECONNREFUSED); 38350Sstevel@tonic-gate goto done; 38360Sstevel@tonic-gate case CHUNK_COOKIE: 38370Sstevel@tonic-gate if (sctp_process_cookie(sctp, ch, mp, &iack, 38380Sstevel@tonic-gate sctph, &recv_adaption, NULL) == -1) { 38390Sstevel@tonic-gate BUMP_MIB(&sctp_mib, 38400Sstevel@tonic-gate sctpInInvalidCookie); 38410Sstevel@tonic-gate break; 38420Sstevel@tonic-gate } 38430Sstevel@tonic-gate sctp_send_cookie_ack(sctp); 38440Sstevel@tonic-gate 38450Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) { 38460Sstevel@tonic-gate sctp->sctp_ulp_connected(sctp->sctp_ulpd); 38470Sstevel@tonic-gate sctp_set_ulp_prop(sctp); 38480Sstevel@tonic-gate } 38490Sstevel@tonic-gate if (sctp->sctp_unacked == 0) 38500Sstevel@tonic-gate sctp_stop_faddr_timers(sctp); 38510Sstevel@tonic-gate sctp->sctp_state = SCTPS_ESTABLISHED; 38520Sstevel@tonic-gate sctp->sctp_assoc_start_time = (uint32_t)lbolt; 38530Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpActiveEstab); 38540Sstevel@tonic-gate if (sctp->sctp_cookie_mp) { 38550Sstevel@tonic-gate freemsg(sctp->sctp_cookie_mp); 38560Sstevel@tonic-gate sctp->sctp_cookie_mp = NULL; 38570Sstevel@tonic-gate } 38580Sstevel@tonic-gate /* Validate the peer addresses. */ 38590Sstevel@tonic-gate sctp->sctp_active = now; 38600Sstevel@tonic-gate sctp_validate_peer(sctp); 38610Sstevel@tonic-gate 38620Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_UP, 0, NULL); 38630Sstevel@tonic-gate if (recv_adaption) { 38640Sstevel@tonic-gate sctp->sctp_recv_adaption = 1; 38650Sstevel@tonic-gate sctp_adaption_event(sctp); 38660Sstevel@tonic-gate } 38670Sstevel@tonic-gate /* Try sending queued data, or ASCONFs */ 38680Sstevel@tonic-gate trysend = 1; 38690Sstevel@tonic-gate break; 38700Sstevel@tonic-gate case CHUNK_INIT: 38710Sstevel@tonic-gate sctp_send_initack(sctp, ch, mp); 38720Sstevel@tonic-gate break; 38730Sstevel@tonic-gate case CHUNK_ERROR: { 38740Sstevel@tonic-gate sctp_parm_hdr_t *p; 38750Sstevel@tonic-gate 38760Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 38770Sstevel@tonic-gate /* check for a stale cookie */ 38780Sstevel@tonic-gate if (ntohs(ch->sch_len) >= 38790Sstevel@tonic-gate (sizeof (*p) + sizeof (*ch)) + 38800Sstevel@tonic-gate sizeof (uint32_t)) { 38810Sstevel@tonic-gate 38820Sstevel@tonic-gate p = (sctp_parm_hdr_t *)(ch + 1); 38830Sstevel@tonic-gate if (p->sph_type == 38840Sstevel@tonic-gate htons(SCTP_ERR_STALE_COOKIE)) { 38850Sstevel@tonic-gate BUMP_MIB(&sctp_mib, 38860Sstevel@tonic-gate sctpAborted); 38870Sstevel@tonic-gate sctp_error_event(sctp, ch); 38880Sstevel@tonic-gate sctp_clean_death(sctp, 38890Sstevel@tonic-gate ECONNREFUSED); 38900Sstevel@tonic-gate goto done; 38910Sstevel@tonic-gate } 38920Sstevel@tonic-gate } 38930Sstevel@tonic-gate break; 38940Sstevel@tonic-gate } 38950Sstevel@tonic-gate case CHUNK_HEARTBEAT: 38960Sstevel@tonic-gate sctp_return_heartbeat(sctp, ch, mp); 38970Sstevel@tonic-gate break; 38980Sstevel@tonic-gate default: 38990Sstevel@tonic-gate if (sctp_strange_chunk(sctp, ch, fp) == 0) { 39000Sstevel@tonic-gate goto nomorechunks; 39010Sstevel@tonic-gate } /* else skip and continue processing */ 39020Sstevel@tonic-gate } /* switch (ch->sch_id) */ 39030Sstevel@tonic-gate break; 39040Sstevel@tonic-gate 39050Sstevel@tonic-gate case SCTPS_SHUTDOWN_ACK_SENT: 39060Sstevel@tonic-gate switch (ch->sch_id) { 39070Sstevel@tonic-gate case CHUNK_ABORT: 39080Sstevel@tonic-gate /* Pass gathered wisdom to IP for keeping */ 39090Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp != NULL; 39100Sstevel@tonic-gate fp = fp->next) { 39110Sstevel@tonic-gate sctp_faddr2ire(sctp, fp); 39120Sstevel@tonic-gate } 39130Sstevel@tonic-gate sctp_process_abort(sctp, ch, 0); 39140Sstevel@tonic-gate goto done; 39150Sstevel@tonic-gate case CHUNK_SHUTDOWN_COMPLETE: 39160Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 39170Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpShutdowns); 39180Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_SHUTDOWN_COMP, 0, 39190Sstevel@tonic-gate NULL); 39200Sstevel@tonic-gate 39210Sstevel@tonic-gate /* Pass gathered wisdom to IP for keeping */ 39220Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp != NULL; 39230Sstevel@tonic-gate fp = fp->next) { 39240Sstevel@tonic-gate sctp_faddr2ire(sctp, fp); 39250Sstevel@tonic-gate } 39260Sstevel@tonic-gate sctp_clean_death(sctp, 0); 39270Sstevel@tonic-gate goto done; 39280Sstevel@tonic-gate case CHUNK_SHUTDOWN_ACK: 39290Sstevel@tonic-gate sctp_shutdown_complete(sctp); 39300Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 39310Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpShutdowns); 39320Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_SHUTDOWN_COMP, 0, 39330Sstevel@tonic-gate NULL); 39340Sstevel@tonic-gate sctp_clean_death(sctp, 0); 39350Sstevel@tonic-gate goto done; 39360Sstevel@tonic-gate case CHUNK_COOKIE: 39370Sstevel@tonic-gate (void) sctp_shutdown_received(sctp, NULL, 39380Sstevel@tonic-gate 1, 0); 39390Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 39400Sstevel@tonic-gate break; 39410Sstevel@tonic-gate case CHUNK_HEARTBEAT: 39420Sstevel@tonic-gate sctp_return_heartbeat(sctp, ch, mp); 39430Sstevel@tonic-gate break; 39440Sstevel@tonic-gate default: 39450Sstevel@tonic-gate if (sctp_strange_chunk(sctp, ch, fp) == 0) { 39460Sstevel@tonic-gate goto nomorechunks; 39470Sstevel@tonic-gate } /* else skip and continue processing */ 39480Sstevel@tonic-gate break; 39490Sstevel@tonic-gate } 39500Sstevel@tonic-gate break; 39510Sstevel@tonic-gate 39520Sstevel@tonic-gate case SCTPS_SHUTDOWN_RECEIVED: 39530Sstevel@tonic-gate switch (ch->sch_id) { 39540Sstevel@tonic-gate case CHUNK_SHUTDOWN: 39550Sstevel@tonic-gate trysend = sctp_shutdown_received(sctp, ch, 39560Sstevel@tonic-gate 0, 0); 39570Sstevel@tonic-gate break; 39580Sstevel@tonic-gate case CHUNK_SACK: 39590Sstevel@tonic-gate trysend = sctp_got_sack(sctp, ch); 3960852Svi117747 if (trysend < 0) { 3961852Svi117747 sctp_send_abort(sctp, sctph->sh_verf, 3962852Svi117747 0, NULL, 0, mp, 0, B_FALSE); 3963852Svi117747 sctp_assoc_event(sctp, 3964852Svi117747 SCTP_COMM_LOST, 0, NULL); 3965852Svi117747 sctp_clean_death(sctp, 3966852Svi117747 ECONNABORTED); 3967852Svi117747 goto done; 3968852Svi117747 } 39690Sstevel@tonic-gate break; 39700Sstevel@tonic-gate case CHUNK_ABORT: 39710Sstevel@tonic-gate sctp_process_abort(sctp, ch, ECONNRESET); 39720Sstevel@tonic-gate goto done; 39730Sstevel@tonic-gate case CHUNK_HEARTBEAT: 39740Sstevel@tonic-gate sctp_return_heartbeat(sctp, ch, mp); 39750Sstevel@tonic-gate break; 39760Sstevel@tonic-gate default: 39770Sstevel@tonic-gate if (sctp_strange_chunk(sctp, ch, fp) == 0) { 39780Sstevel@tonic-gate goto nomorechunks; 39790Sstevel@tonic-gate } /* else skip and continue processing */ 39800Sstevel@tonic-gate break; 39810Sstevel@tonic-gate } 39820Sstevel@tonic-gate break; 39830Sstevel@tonic-gate 39840Sstevel@tonic-gate default: 39850Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_ibchunks); 39860Sstevel@tonic-gate cmn_err(CE_WARN, "XXXdefault in dispatch state %d", 39870Sstevel@tonic-gate sctp->sctp_state); 39880Sstevel@tonic-gate break; 39890Sstevel@tonic-gate } /* switch (sctp->sctp_state) */ 39900Sstevel@tonic-gate 39910Sstevel@tonic-gate ch = sctp_next_chunk(ch, &mlen); 39920Sstevel@tonic-gate if (ch != NULL && !sctp_check_input(sctp, ch, mlen, 0)) 39930Sstevel@tonic-gate goto done; 39940Sstevel@tonic-gate } while (ch != NULL); 39950Sstevel@tonic-gate 39960Sstevel@tonic-gate /* Finished processing all chunks in packet */ 39970Sstevel@tonic-gate 39980Sstevel@tonic-gate nomorechunks: 39990Sstevel@tonic-gate /* SACK if necessary */ 40000Sstevel@tonic-gate if (gotdata) { 40010Sstevel@tonic-gate (sctp->sctp_sack_toggle)++; 40020Sstevel@tonic-gate sctp_sack(sctp, dups); 40030Sstevel@tonic-gate dups = NULL; 40040Sstevel@tonic-gate 40050Sstevel@tonic-gate if (!sctp->sctp_ack_timer_running) { 40060Sstevel@tonic-gate sctp->sctp_ack_timer_running = B_TRUE; 40070Sstevel@tonic-gate sctp_timer(sctp, sctp->sctp_ack_mp, 40080Sstevel@tonic-gate MSEC_TO_TICK(sctp_deferred_ack_interval)); 40090Sstevel@tonic-gate } 40100Sstevel@tonic-gate } 40110Sstevel@tonic-gate 40120Sstevel@tonic-gate if (trysend) { 40130Sstevel@tonic-gate sctp_output(sctp); 40140Sstevel@tonic-gate if (sctp->sctp_cxmit_list != NULL) 40150Sstevel@tonic-gate sctp_wput_asconf(sctp, NULL); 40160Sstevel@tonic-gate } 40170Sstevel@tonic-gate /* If there is unsent data, make sure a timer is running */ 40180Sstevel@tonic-gate if (sctp->sctp_unsent > 0 && !sctp->sctp_current->timer_running) { 40190Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, sctp->sctp_current, 40200Sstevel@tonic-gate sctp->sctp_current->rto); 40210Sstevel@tonic-gate } 40220Sstevel@tonic-gate 40230Sstevel@tonic-gate done: 40240Sstevel@tonic-gate if (dups != NULL) 40250Sstevel@tonic-gate freeb(dups); 40260Sstevel@tonic-gate if (ipsec_mp != NULL) 40270Sstevel@tonic-gate freeb(ipsec_mp); 40280Sstevel@tonic-gate freemsg(mp); 40290Sstevel@tonic-gate 40300Sstevel@tonic-gate if (wake_eager) { 40310Sstevel@tonic-gate /* 40320Sstevel@tonic-gate * sctp points to newly created control block, need to 40330Sstevel@tonic-gate * release it before exiting. Before releasing it and 40340Sstevel@tonic-gate * processing the sendq, need to grab a hold on it. 40350Sstevel@tonic-gate * Otherwise, another thread can close it while processing 40360Sstevel@tonic-gate * the sendq. 40370Sstevel@tonic-gate */ 40380Sstevel@tonic-gate SCTP_REFHOLD(sctp); 40390Sstevel@tonic-gate WAKE_SCTP(sctp); 40400Sstevel@tonic-gate sctp_process_sendq(sctp); 40410Sstevel@tonic-gate SCTP_REFRELE(sctp); 40420Sstevel@tonic-gate } 40430Sstevel@tonic-gate } 40440Sstevel@tonic-gate 40450Sstevel@tonic-gate /* 40460Sstevel@tonic-gate * Some amount of data got removed from rx q. 40470Sstevel@tonic-gate * Check if we should send a window update. 40480Sstevel@tonic-gate * 40490Sstevel@tonic-gate * Due to way sctp_rwnd updates are made, ULP can give reports out-of-order. 40500Sstevel@tonic-gate * To keep from dropping incoming data due to this, we only update 40510Sstevel@tonic-gate * sctp_rwnd when if it's larger than what we've reported to peer earlier. 40520Sstevel@tonic-gate */ 40530Sstevel@tonic-gate void 40540Sstevel@tonic-gate sctp_recvd(sctp_t *sctp, int len) 40550Sstevel@tonic-gate { 40560Sstevel@tonic-gate int32_t old, new; 40570Sstevel@tonic-gate 40580Sstevel@tonic-gate ASSERT(sctp != NULL); 40590Sstevel@tonic-gate RUN_SCTP(sctp); 40600Sstevel@tonic-gate 40610Sstevel@tonic-gate if (len < sctp->sctp_rwnd) { 40620Sstevel@tonic-gate WAKE_SCTP(sctp); 40630Sstevel@tonic-gate return; 40640Sstevel@tonic-gate } 40650Sstevel@tonic-gate ASSERT(sctp->sctp_rwnd >= sctp->sctp_rxqueued); 40660Sstevel@tonic-gate old = sctp->sctp_rwnd - sctp->sctp_rxqueued; 40670Sstevel@tonic-gate new = len - sctp->sctp_rxqueued; 40680Sstevel@tonic-gate sctp->sctp_rwnd = len; 40690Sstevel@tonic-gate 40700Sstevel@tonic-gate if (sctp->sctp_state >= SCTPS_ESTABLISHED && 40710Sstevel@tonic-gate ((old <= new >> 1) || (old < sctp->sctp_mss))) { 40720Sstevel@tonic-gate sctp->sctp_force_sack = 1; 40730Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpOutWinUpdate); 40740Sstevel@tonic-gate sctp_sack(sctp, NULL); 40750Sstevel@tonic-gate old = 1; 40760Sstevel@tonic-gate } else { 40770Sstevel@tonic-gate old = 0; 40780Sstevel@tonic-gate } 40790Sstevel@tonic-gate WAKE_SCTP(sctp); 40800Sstevel@tonic-gate if (old > 0) { 40810Sstevel@tonic-gate sctp_process_sendq(sctp); 40820Sstevel@tonic-gate } 40830Sstevel@tonic-gate } 4084