17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*77c67f2fSkcpoon * Common Development and Distribution License (the "License"). 6*77c67f2fSkcpoon * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21*77c67f2fSkcpoon 227c478bd9Sstevel@tonic-gate /* 23*77c67f2fSkcpoon * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 307c478bd9Sstevel@tonic-gate #include <sys/systm.h> 317c478bd9Sstevel@tonic-gate #include <sys/stream.h> 327c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 337c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 347c478bd9Sstevel@tonic-gate #include <sys/strsubr.h> 357c478bd9Sstevel@tonic-gate #include <sys/strsun.h> 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate #include <netinet/in.h> 387c478bd9Sstevel@tonic-gate #include <netinet/ip6.h> 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate #include <inet/common.h> 417c478bd9Sstevel@tonic-gate #include <inet/ip.h> 427c478bd9Sstevel@tonic-gate #include <inet/ip6.h> 437c478bd9Sstevel@tonic-gate #include <inet/mib2.h> 447c478bd9Sstevel@tonic-gate #include <inet/nd.h> 457c478bd9Sstevel@tonic-gate #include <inet/optcom.h> 467c478bd9Sstevel@tonic-gate #include <inet/sctp_ip.h> 477c478bd9Sstevel@tonic-gate #include "sctp_impl.h" 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate void 507c478bd9Sstevel@tonic-gate sctp_send_shutdown(sctp_t *sctp, int rexmit) 517c478bd9Sstevel@tonic-gate { 527c478bd9Sstevel@tonic-gate mblk_t *smp; 537c478bd9Sstevel@tonic-gate mblk_t *sendmp; 547c478bd9Sstevel@tonic-gate sctp_chunk_hdr_t *sch; 557c478bd9Sstevel@tonic-gate uint32_t *ctsn; 567c478bd9Sstevel@tonic-gate sctp_faddr_t *fp; 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate if (sctp->sctp_state != SCTPS_ESTABLISHED && 597c478bd9Sstevel@tonic-gate sctp->sctp_state != SCTPS_SHUTDOWN_PENDING && 607c478bd9Sstevel@tonic-gate sctp->sctp_state != SCTPS_SHUTDOWN_SENT) { 617c478bd9Sstevel@tonic-gate return; 627c478bd9Sstevel@tonic-gate } 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_ESTABLISHED) { 657c478bd9Sstevel@tonic-gate sctp->sctp_state = SCTPS_SHUTDOWN_PENDING; 667c478bd9Sstevel@tonic-gate /* 677c478bd9Sstevel@tonic-gate * We set an upper bound on how long we will 687c478bd9Sstevel@tonic-gate * wait for a shutdown-ack from the peer. This 697c478bd9Sstevel@tonic-gate * is to prevent the receiver from attempting 707c478bd9Sstevel@tonic-gate * to create a half-closed state indefinately. 717c478bd9Sstevel@tonic-gate * See archive from IETF TSVWG mailing list 727c478bd9Sstevel@tonic-gate * for June 2001 for more information. 737c478bd9Sstevel@tonic-gate * Since we will not be calculating RTTs after 747c478bd9Sstevel@tonic-gate * sending the shutdown, we can overload out_time 757c478bd9Sstevel@tonic-gate * to track how long we have waited. 767c478bd9Sstevel@tonic-gate */ 777c478bd9Sstevel@tonic-gate sctp->sctp_out_time = lbolt64; 787c478bd9Sstevel@tonic-gate } 797c478bd9Sstevel@tonic-gate 807c478bd9Sstevel@tonic-gate /* 817c478bd9Sstevel@tonic-gate * If there is unsent (or unacked) data, wait for it to get ack'd 827c478bd9Sstevel@tonic-gate */ 837c478bd9Sstevel@tonic-gate if (sctp->sctp_xmit_head != NULL || sctp->sctp_xmit_unsent != NULL) { 847c478bd9Sstevel@tonic-gate return; 857c478bd9Sstevel@tonic-gate } 867c478bd9Sstevel@tonic-gate 877c478bd9Sstevel@tonic-gate /* rotate faddrs if we are retransmitting */ 887c478bd9Sstevel@tonic-gate if (!rexmit) { 897c478bd9Sstevel@tonic-gate fp = sctp->sctp_current; 907c478bd9Sstevel@tonic-gate } else { 917c478bd9Sstevel@tonic-gate fp = sctp_rotate_faddr(sctp, sctp->sctp_shutdown_faddr); 927c478bd9Sstevel@tonic-gate } 937c478bd9Sstevel@tonic-gate 947c478bd9Sstevel@tonic-gate sctp->sctp_shutdown_faddr = fp; 957c478bd9Sstevel@tonic-gate 967c478bd9Sstevel@tonic-gate /* Link in a SACK if resending the shutdown */ 977c478bd9Sstevel@tonic-gate if (sctp->sctp_state > SCTPS_SHUTDOWN_PENDING && 987c478bd9Sstevel@tonic-gate (sendmp = sctp_make_sack(sctp, fp, NULL)) != NULL) { 997c478bd9Sstevel@tonic-gate 1007c478bd9Sstevel@tonic-gate smp = allocb(sizeof (*sch) + sizeof (*ctsn), BPRI_MED); 1017c478bd9Sstevel@tonic-gate if (smp == NULL) { 1027c478bd9Sstevel@tonic-gate freemsg(sendmp); 1037c478bd9Sstevel@tonic-gate goto done; 1047c478bd9Sstevel@tonic-gate } 1057c478bd9Sstevel@tonic-gate linkb(sendmp, smp); 1067c478bd9Sstevel@tonic-gate 1077c478bd9Sstevel@tonic-gate sch = (sctp_chunk_hdr_t *)smp->b_rptr; 1087c478bd9Sstevel@tonic-gate smp->b_wptr = smp->b_rptr + sizeof (*sch) + sizeof (*ctsn); 1097c478bd9Sstevel@tonic-gate } else { 1107c478bd9Sstevel@tonic-gate sendmp = sctp_make_mp(sctp, fp, 1117c478bd9Sstevel@tonic-gate sizeof (*sch) + sizeof (*ctsn)); 1127c478bd9Sstevel@tonic-gate if (sendmp == NULL) { 113*77c67f2fSkcpoon SCTP_KSTAT(sctp_send_shutdown_failed); 1147c478bd9Sstevel@tonic-gate goto done; 1157c478bd9Sstevel@tonic-gate } 1167c478bd9Sstevel@tonic-gate sch = (sctp_chunk_hdr_t *)sendmp->b_wptr; 1177c478bd9Sstevel@tonic-gate sendmp->b_wptr += sizeof (*sch) + sizeof (*ctsn); 1187c478bd9Sstevel@tonic-gate 1197c478bd9Sstevel@tonic-gate /* shutdown w/o sack, update lastacked */ 1207c478bd9Sstevel@tonic-gate sctp->sctp_lastacked = sctp->sctp_ftsn - 1; 1217c478bd9Sstevel@tonic-gate } 1227c478bd9Sstevel@tonic-gate 1237c478bd9Sstevel@tonic-gate sch->sch_id = CHUNK_SHUTDOWN; 1247c478bd9Sstevel@tonic-gate sch->sch_flags = 0; 1257c478bd9Sstevel@tonic-gate sch->sch_len = htons(sizeof (*sch) + sizeof (*ctsn)); 1267c478bd9Sstevel@tonic-gate 1277c478bd9Sstevel@tonic-gate ctsn = (uint32_t *)(sch + 1); 1287c478bd9Sstevel@tonic-gate *ctsn = htonl(sctp->sctp_lastacked); 1297c478bd9Sstevel@tonic-gate 1307c478bd9Sstevel@tonic-gate /* Link the shutdown chunk in after the IP/SCTP header */ 1317c478bd9Sstevel@tonic-gate 1327c478bd9Sstevel@tonic-gate sctp_set_iplen(sctp, sendmp); 1337c478bd9Sstevel@tonic-gate 1347c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_obchunks); 1357c478bd9Sstevel@tonic-gate 1367c478bd9Sstevel@tonic-gate /* Send the shutdown and restart the timer */ 1377c478bd9Sstevel@tonic-gate sctp_add_sendq(sctp, sendmp); 1387c478bd9Sstevel@tonic-gate 1397c478bd9Sstevel@tonic-gate done: 1407c478bd9Sstevel@tonic-gate sctp->sctp_state = SCTPS_SHUTDOWN_SENT; 1417c478bd9Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, sctp->sctp_current, 1427c478bd9Sstevel@tonic-gate sctp->sctp_current->rto); 1437c478bd9Sstevel@tonic-gate } 1447c478bd9Sstevel@tonic-gate 1457c478bd9Sstevel@tonic-gate int 146*77c67f2fSkcpoon sctp_shutdown_received(sctp_t *sctp, sctp_chunk_hdr_t *sch, boolean_t crwsd, 147*77c67f2fSkcpoon boolean_t rexmit, sctp_faddr_t *fp) 1487c478bd9Sstevel@tonic-gate { 1497c478bd9Sstevel@tonic-gate mblk_t *samp; 1507c478bd9Sstevel@tonic-gate sctp_chunk_hdr_t *sach; 1517c478bd9Sstevel@tonic-gate uint32_t *tsn; 1527c478bd9Sstevel@tonic-gate int trysend = 0; 1537c478bd9Sstevel@tonic-gate 1547c478bd9Sstevel@tonic-gate if (sctp->sctp_state != SCTPS_SHUTDOWN_ACK_SENT) 1557c478bd9Sstevel@tonic-gate sctp->sctp_state = SCTPS_SHUTDOWN_RECEIVED; 1567c478bd9Sstevel@tonic-gate 1577c478bd9Sstevel@tonic-gate /* Extract and process the TSN in the shutdown chunk */ 1587c478bd9Sstevel@tonic-gate if (sch != NULL) { 1597c478bd9Sstevel@tonic-gate tsn = (uint32_t *)(sch + 1); 1607c478bd9Sstevel@tonic-gate trysend = sctp_cumack(sctp, ntohl(*tsn), &samp); 1617c478bd9Sstevel@tonic-gate } 1627c478bd9Sstevel@tonic-gate 1637c478bd9Sstevel@tonic-gate /* Don't allow sending new data */ 1647c478bd9Sstevel@tonic-gate if (!SCTP_IS_DETACHED(sctp)) 1657c478bd9Sstevel@tonic-gate sctp->sctp_ulp_disconnecting(sctp->sctp_ulpd); 1667c478bd9Sstevel@tonic-gate 1677c478bd9Sstevel@tonic-gate /* 1687c478bd9Sstevel@tonic-gate * If there is unsent or unacked data, try sending them out now. 1697c478bd9Sstevel@tonic-gate * The other side should acknowledge them. After we have flushed 1707c478bd9Sstevel@tonic-gate * the transmit queue, we can complete the shutdown sequence. 1717c478bd9Sstevel@tonic-gate */ 1727c478bd9Sstevel@tonic-gate if (sctp->sctp_xmit_head != NULL || sctp->sctp_xmit_unsent != NULL) 1737c478bd9Sstevel@tonic-gate return (1); 1747c478bd9Sstevel@tonic-gate 175*77c67f2fSkcpoon if (fp == NULL) { 1767c478bd9Sstevel@tonic-gate /* rotate faddrs if we are retransmitting */ 1777c478bd9Sstevel@tonic-gate if (!rexmit) 1787c478bd9Sstevel@tonic-gate fp = sctp->sctp_current; 1797c478bd9Sstevel@tonic-gate else 1807c478bd9Sstevel@tonic-gate fp = sctp_rotate_faddr(sctp, sctp->sctp_shutdown_faddr); 181*77c67f2fSkcpoon } 182*77c67f2fSkcpoon sctp->sctp_shutdown_faddr = fp; 1837c478bd9Sstevel@tonic-gate 1847c478bd9Sstevel@tonic-gate samp = sctp_make_mp(sctp, fp, sizeof (*sach)); 185*77c67f2fSkcpoon if (samp == NULL) { 186*77c67f2fSkcpoon SCTP_KSTAT(sctp_send_shutdown_ack_failed); 1877c478bd9Sstevel@tonic-gate goto dotimer; 188*77c67f2fSkcpoon } 1897c478bd9Sstevel@tonic-gate 1907c478bd9Sstevel@tonic-gate sach = (sctp_chunk_hdr_t *)samp->b_wptr; 1917c478bd9Sstevel@tonic-gate sach->sch_id = CHUNK_SHUTDOWN_ACK; 1927c478bd9Sstevel@tonic-gate sach->sch_flags = 0; 1937c478bd9Sstevel@tonic-gate sach->sch_len = htons(sizeof (*sach)); 1947c478bd9Sstevel@tonic-gate 1957c478bd9Sstevel@tonic-gate samp->b_wptr += sizeof (*sach); 1967c478bd9Sstevel@tonic-gate 1977c478bd9Sstevel@tonic-gate /* 1987c478bd9Sstevel@tonic-gate * bundle a "cookie received while shutting down" error if 1997c478bd9Sstevel@tonic-gate * the caller asks for it. 2007c478bd9Sstevel@tonic-gate */ 2017c478bd9Sstevel@tonic-gate if (crwsd) { 2027c478bd9Sstevel@tonic-gate mblk_t *errmp; 2037c478bd9Sstevel@tonic-gate 2047c478bd9Sstevel@tonic-gate errmp = sctp_make_err(sctp, SCTP_ERR_COOKIE_SHUT, NULL, 0); 2057c478bd9Sstevel@tonic-gate if (errmp != NULL) { 2067c478bd9Sstevel@tonic-gate linkb(samp, errmp); 2077c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_obchunks); 2087c478bd9Sstevel@tonic-gate } 2097c478bd9Sstevel@tonic-gate } 2107c478bd9Sstevel@tonic-gate 2117c478bd9Sstevel@tonic-gate sctp_set_iplen(sctp, samp); 2127c478bd9Sstevel@tonic-gate 2137c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_obchunks); 2147c478bd9Sstevel@tonic-gate 2157c478bd9Sstevel@tonic-gate sctp_add_sendq(sctp, samp); 2167c478bd9Sstevel@tonic-gate 2177c478bd9Sstevel@tonic-gate dotimer: 2187c478bd9Sstevel@tonic-gate sctp->sctp_state = SCTPS_SHUTDOWN_ACK_SENT; 2197c478bd9Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, sctp->sctp_current, 2207c478bd9Sstevel@tonic-gate sctp->sctp_current->rto); 2217c478bd9Sstevel@tonic-gate 2227c478bd9Sstevel@tonic-gate return (trysend); 2237c478bd9Sstevel@tonic-gate } 2247c478bd9Sstevel@tonic-gate 2257c478bd9Sstevel@tonic-gate void 2267c478bd9Sstevel@tonic-gate sctp_shutdown_complete(sctp_t *sctp) 2277c478bd9Sstevel@tonic-gate { 2287c478bd9Sstevel@tonic-gate mblk_t *scmp; 2297c478bd9Sstevel@tonic-gate sctp_chunk_hdr_t *scch; 2307c478bd9Sstevel@tonic-gate 2317c478bd9Sstevel@tonic-gate scmp = sctp_make_mp(sctp, NULL, sizeof (*scch)); 2327c478bd9Sstevel@tonic-gate if (scmp == NULL) { 2337c478bd9Sstevel@tonic-gate /* XXX use timer approach */ 234*77c67f2fSkcpoon SCTP_KSTAT(sctp_send_shutdown_comp_failed); 2357c478bd9Sstevel@tonic-gate return; 2367c478bd9Sstevel@tonic-gate } 2377c478bd9Sstevel@tonic-gate 2387c478bd9Sstevel@tonic-gate scch = (sctp_chunk_hdr_t *)scmp->b_wptr; 2397c478bd9Sstevel@tonic-gate scch->sch_id = CHUNK_SHUTDOWN_COMPLETE; 2407c478bd9Sstevel@tonic-gate scch->sch_flags = 0; 2417c478bd9Sstevel@tonic-gate scch->sch_len = htons(sizeof (*scch)); 2427c478bd9Sstevel@tonic-gate 2437c478bd9Sstevel@tonic-gate scmp->b_wptr += sizeof (*scch); 2447c478bd9Sstevel@tonic-gate 2457c478bd9Sstevel@tonic-gate sctp_set_iplen(sctp, scmp); 2467c478bd9Sstevel@tonic-gate 2477c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_obchunks); 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate sctp_add_sendq(sctp, scmp); 2507c478bd9Sstevel@tonic-gate } 2517c478bd9Sstevel@tonic-gate 2527c478bd9Sstevel@tonic-gate /* 2537c478bd9Sstevel@tonic-gate * Similar to sctp_shutdown_complete(), except that since this 2547c478bd9Sstevel@tonic-gate * is out-of-the-blue, we can't use an sctp's association information, 2557c478bd9Sstevel@tonic-gate * and instead must draw all necessary info from the incoming packet. 2567c478bd9Sstevel@tonic-gate */ 2577c478bd9Sstevel@tonic-gate void 2587c478bd9Sstevel@tonic-gate sctp_ootb_shutdown_ack(sctp_t *gsctp, mblk_t *inmp, uint_t ip_hdr_len) 2597c478bd9Sstevel@tonic-gate { 2607c478bd9Sstevel@tonic-gate boolean_t isv4; 2617c478bd9Sstevel@tonic-gate ipha_t *inip4h; 2627c478bd9Sstevel@tonic-gate ip6_t *inip6h; 2637c478bd9Sstevel@tonic-gate sctp_hdr_t *insctph; 2647c478bd9Sstevel@tonic-gate sctp_chunk_hdr_t *scch; 2657c478bd9Sstevel@tonic-gate int i; 2667c478bd9Sstevel@tonic-gate uint16_t port; 2677c478bd9Sstevel@tonic-gate mblk_t *mp1; 2687c478bd9Sstevel@tonic-gate 2697c478bd9Sstevel@tonic-gate isv4 = (IPH_HDR_VERSION(inmp->b_rptr) == IPV4_VERSION); 2707c478bd9Sstevel@tonic-gate 2717c478bd9Sstevel@tonic-gate /* 2727c478bd9Sstevel@tonic-gate * The gsctp should contain the minimal IP header. So the 2737c478bd9Sstevel@tonic-gate * incoming mblk should be able to hold the new SCTP packet. 2747c478bd9Sstevel@tonic-gate */ 2757c478bd9Sstevel@tonic-gate ASSERT(MBLKL(inmp) >= sizeof (*insctph) + sizeof (*scch) + 2767c478bd9Sstevel@tonic-gate (isv4 ? gsctp->sctp_ip_hdr_len : gsctp->sctp_ip_hdr6_len)); 2777c478bd9Sstevel@tonic-gate 2787c478bd9Sstevel@tonic-gate /* 2797c478bd9Sstevel@tonic-gate * Check to see if we can reuse the incoming mblk. There should 280*77c67f2fSkcpoon * not be other reference and the db_base of the mblk should be 281*77c67f2fSkcpoon * properly aligned. Since this packet comes from below, 2827c478bd9Sstevel@tonic-gate * there should be enough header space to fill in what the lower 2837c478bd9Sstevel@tonic-gate * layers want to add. And we will not stash anything there. 2847c478bd9Sstevel@tonic-gate */ 285*77c67f2fSkcpoon if (!IS_P2ALIGNED(DB_BASE(inmp), sizeof (ire_t *)) || 286*77c67f2fSkcpoon DB_REF(inmp) != 1) { 2877c478bd9Sstevel@tonic-gate mp1 = allocb(MBLKL(inmp) + sctp_wroff_xtra, BPRI_MED); 2887c478bd9Sstevel@tonic-gate if (mp1 == NULL) { 2897c478bd9Sstevel@tonic-gate freeb(inmp); 2907c478bd9Sstevel@tonic-gate return; 2917c478bd9Sstevel@tonic-gate } 2927c478bd9Sstevel@tonic-gate mp1->b_rptr += sctp_wroff_xtra; 2937c478bd9Sstevel@tonic-gate mp1->b_wptr = mp1->b_rptr + MBLKL(inmp); 2947c478bd9Sstevel@tonic-gate bcopy(inmp->b_rptr, mp1->b_rptr, MBLKL(inmp)); 2957c478bd9Sstevel@tonic-gate freeb(inmp); 2967c478bd9Sstevel@tonic-gate inmp = mp1; 2977c478bd9Sstevel@tonic-gate } 2987c478bd9Sstevel@tonic-gate 2997c478bd9Sstevel@tonic-gate /* 3007c478bd9Sstevel@tonic-gate * We follow the logic in tcp_xmit_early_reset() in that we skip 3017c478bd9Sstevel@tonic-gate * reversing source route (i.e. relpace all IP options with EOL). 3027c478bd9Sstevel@tonic-gate */ 3037c478bd9Sstevel@tonic-gate if (isv4) { 3047c478bd9Sstevel@tonic-gate ipaddr_t v4addr; 3057c478bd9Sstevel@tonic-gate 3067c478bd9Sstevel@tonic-gate inip4h = (ipha_t *)inmp->b_rptr; 3077c478bd9Sstevel@tonic-gate for (i = IP_SIMPLE_HDR_LENGTH; i < (int)ip_hdr_len; i++) 3087c478bd9Sstevel@tonic-gate inmp->b_rptr[i] = IPOPT_EOL; 3097c478bd9Sstevel@tonic-gate /* Swap addresses */ 3107c478bd9Sstevel@tonic-gate inip4h->ipha_length = htons(ip_hdr_len + sizeof (*insctph) + 3117c478bd9Sstevel@tonic-gate sizeof (*scch)); 3127c478bd9Sstevel@tonic-gate v4addr = inip4h->ipha_src; 3137c478bd9Sstevel@tonic-gate inip4h->ipha_src = inip4h->ipha_dst; 3147c478bd9Sstevel@tonic-gate inip4h->ipha_dst = v4addr; 3157c478bd9Sstevel@tonic-gate inip4h->ipha_ident = 0; 3167c478bd9Sstevel@tonic-gate inip4h->ipha_ttl = (uchar_t)sctp_ipv4_ttl; 3177c478bd9Sstevel@tonic-gate } else { 3187c478bd9Sstevel@tonic-gate in6_addr_t v6addr; 3197c478bd9Sstevel@tonic-gate 3207c478bd9Sstevel@tonic-gate inip6h = (ip6_t *)inmp->b_rptr; 3217c478bd9Sstevel@tonic-gate /* Remove any extension headers assuming partial overlay */ 3227c478bd9Sstevel@tonic-gate if (ip_hdr_len > IPV6_HDR_LEN) { 3237c478bd9Sstevel@tonic-gate uint8_t *to; 3247c478bd9Sstevel@tonic-gate 3257c478bd9Sstevel@tonic-gate to = inmp->b_rptr + ip_hdr_len - IPV6_HDR_LEN; 3267c478bd9Sstevel@tonic-gate ovbcopy(inip6h, to, IPV6_HDR_LEN); 3277c478bd9Sstevel@tonic-gate inmp->b_rptr += ip_hdr_len - IPV6_HDR_LEN; 3287c478bd9Sstevel@tonic-gate ip_hdr_len = IPV6_HDR_LEN; 3297c478bd9Sstevel@tonic-gate inip6h = (ip6_t *)inmp->b_rptr; 3307c478bd9Sstevel@tonic-gate inip6h->ip6_nxt = IPPROTO_SCTP; 3317c478bd9Sstevel@tonic-gate } 3327c478bd9Sstevel@tonic-gate inip6h->ip6_plen = htons(ip_hdr_len + sizeof (*insctph) + 3337c478bd9Sstevel@tonic-gate sizeof (*scch) - IPV6_HDR_LEN); 3347c478bd9Sstevel@tonic-gate v6addr = inip6h->ip6_src; 3357c478bd9Sstevel@tonic-gate inip6h->ip6_src = inip6h->ip6_dst; 3367c478bd9Sstevel@tonic-gate inip6h->ip6_dst = v6addr; 3377c478bd9Sstevel@tonic-gate inip6h->ip6_hops = (uchar_t)sctp_ipv6_hoplimit; 3387c478bd9Sstevel@tonic-gate } 3397c478bd9Sstevel@tonic-gate insctph = (sctp_hdr_t *)(inmp->b_rptr + ip_hdr_len); 3407c478bd9Sstevel@tonic-gate 3417c478bd9Sstevel@tonic-gate /* Swap ports. Verification tag is reused. */ 3427c478bd9Sstevel@tonic-gate port = insctph->sh_sport; 3437c478bd9Sstevel@tonic-gate insctph->sh_sport = insctph->sh_dport; 3447c478bd9Sstevel@tonic-gate insctph->sh_dport = port; 3457c478bd9Sstevel@tonic-gate 3467c478bd9Sstevel@tonic-gate /* Lay in the shutdown complete chunk */ 3477c478bd9Sstevel@tonic-gate scch = (sctp_chunk_hdr_t *)(insctph + 1); 3487c478bd9Sstevel@tonic-gate scch->sch_id = CHUNK_SHUTDOWN_COMPLETE; 3497c478bd9Sstevel@tonic-gate scch->sch_len = htons(sizeof (*scch)); 3507c478bd9Sstevel@tonic-gate scch->sch_flags = 0; 3517c478bd9Sstevel@tonic-gate 3527c478bd9Sstevel@tonic-gate /* Set the T-bit */ 3537c478bd9Sstevel@tonic-gate SCTP_SET_TBIT(scch); 3547c478bd9Sstevel@tonic-gate 3557c478bd9Sstevel@tonic-gate BUMP_LOCAL(gsctp->sctp_obchunks); 3567c478bd9Sstevel@tonic-gate /* Nothing to stash... */ 3577c478bd9Sstevel@tonic-gate SCTP_STASH_IPINFO(inmp, (ire_t *)NULL); 3587c478bd9Sstevel@tonic-gate 3597c478bd9Sstevel@tonic-gate sctp_add_sendq(gsctp, inmp); 3607c478bd9Sstevel@tonic-gate } 361