sctp6_usrreq.c revision 319403
1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3235828Stuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4235828Stuexen * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5163953Srrs * 6163953Srrs * Redistribution and use in source and binary forms, with or without 7163953Srrs * modification, are permitted provided that the following conditions are met: 8163953Srrs * 9163953Srrs * a) Redistributions of source code must retain the above copyright notice, 10228653Stuexen * this list of conditions and the following disclaimer. 11163953Srrs * 12163953Srrs * b) Redistributions in binary form must reproduce the above copyright 13163953Srrs * notice, this list of conditions and the following disclaimer in 14228653Stuexen * the documentation and/or other materials provided with the distribution. 15163953Srrs * 16163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 17163953Srrs * contributors may be used to endorse or promote products derived 18163953Srrs * from this software without specific prior written permission. 19163953Srrs * 20163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 31163953Srrs */ 32174510Sobrien 33163954Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: stable/11/sys/netinet6/sctp6_usrreq.c 319403 2017-06-01 08:58:39Z tuexen $"); 35163953Srrs 36166086Srrs#include <netinet/sctp_os.h> 37238501Stuexen#ifdef INET6 38163953Srrs#include <sys/proc.h> 39163953Srrs#include <netinet/sctp_pcb.h> 40163953Srrs#include <netinet/sctp_header.h> 41163953Srrs#include <netinet/sctp_var.h> 42168709Srrs#include <netinet6/sctp6_var.h> 43167598Srrs#include <netinet/sctp_sysctl.h> 44163953Srrs#include <netinet/sctp_output.h> 45166086Srrs#include <netinet/sctp_uio.h> 46163953Srrs#include <netinet/sctp_asconf.h> 47166086Srrs#include <netinet/sctputil.h> 48166086Srrs#include <netinet/sctp_indata.h> 49166086Srrs#include <netinet/sctp_timer.h> 50166086Srrs#include <netinet/sctp_auth.h> 51168709Srrs#include <netinet/sctp_input.h> 52168709Srrs#include <netinet/sctp_output.h> 53170091Srrs#include <netinet/sctp_bsd_addr.h> 54188067Srrs#include <netinet/sctp_crc32.h> 55285877Stuexen#include <netinet/icmp6.h> 56179783Srrs#include <netinet/udp.h> 57163953Srrs 58163953Srrsextern struct protosw inetsw[]; 59163953Srrs 60163953Srrsint 61243186Stuexensctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 62163953Srrs{ 63165647Srrs struct mbuf *m; 64237569Stuexen int iphlen; 65238003Stuexen uint32_t vrf_id; 66237569Stuexen uint8_t ecn_bits; 67237715Stuexen struct sockaddr_in6 src, dst; 68163953Srrs struct ip6_hdr *ip6; 69163953Srrs struct sctphdr *sh; 70163953Srrs struct sctp_chunkhdr *ch; 71237569Stuexen int length, offset; 72211969Stuexen#if !defined(SCTP_WITH_NO_CSUM) 73238003Stuexen uint8_t compute_crc; 74211969Stuexen#endif 75238003Stuexen uint32_t mflowid; 76275483Stuexen uint8_t mflowtype; 77284515Stuexen uint16_t fibnum; 78163953Srrs 79237569Stuexen iphlen = *offp; 80169352Srrs if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 81169352Srrs SCTP_RELEASE_PKT(*i_pak); 82237569Stuexen return (IPPROTO_DONE); 83169352Srrs } 84168709Srrs m = SCTP_HEADER_TO_CHAIN(*i_pak); 85237569Stuexen#ifdef SCTP_MBUF_LOGGING 86237569Stuexen /* Log in any input mbufs */ 87237569Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 88276914Stuexen sctp_log_mbc(m, SCTP_MBUF_INPUT); 89237569Stuexen } 90237569Stuexen#endif 91237540Stuexen#ifdef SCTP_PACKET_LOGGING 92237540Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 93237540Stuexen sctp_packet_log(m); 94237540Stuexen } 95170091Srrs#endif 96238003Stuexen SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 97254854Stuexen "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 98238003Stuexen m->m_pkthdr.len, 99238003Stuexen if_name(m->m_pkthdr.rcvif), 100254854Stuexen (int)m->m_pkthdr.csum_flags, CSUM_BITS); 101275483Stuexen mflowid = m->m_pkthdr.flowid; 102275483Stuexen mflowtype = M_HASHTYPE_GET(m); 103284515Stuexen fibnum = M_GETFIB(m); 104237569Stuexen SCTP_STAT_INCR(sctps_recvpackets); 105237569Stuexen SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 106237569Stuexen /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 107238003Stuexen offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 108163953Srrs ip6 = mtod(m, struct ip6_hdr *); 109237569Stuexen IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 110237569Stuexen (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 111163953Srrs if (sh == NULL) { 112163953Srrs SCTP_STAT_INCR(sctps_hdrops); 113228907Stuexen return (IPPROTO_DONE); 114163953Srrs } 115163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 116237569Stuexen offset -= sizeof(struct sctp_chunkhdr); 117237715Stuexen memset(&src, 0, sizeof(struct sockaddr_in6)); 118237715Stuexen src.sin6_family = AF_INET6; 119237715Stuexen src.sin6_len = sizeof(struct sockaddr_in6); 120237715Stuexen src.sin6_port = sh->src_port; 121237715Stuexen src.sin6_addr = ip6->ip6_src; 122237715Stuexen if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 123238003Stuexen goto out; 124237715Stuexen } 125237715Stuexen memset(&dst, 0, sizeof(struct sockaddr_in6)); 126237715Stuexen dst.sin6_family = AF_INET6; 127237715Stuexen dst.sin6_len = sizeof(struct sockaddr_in6); 128237715Stuexen dst.sin6_port = sh->dest_port; 129237715Stuexen dst.sin6_addr = ip6->ip6_dst; 130237715Stuexen if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 131238003Stuexen goto out; 132237715Stuexen } 133237569Stuexen length = ntohs(ip6->ip6_plen) + iphlen; 134237569Stuexen /* Validate mbuf chain length with IP payload length. */ 135238003Stuexen if (SCTP_HEADER_LEN(m) != length) { 136237569Stuexen SCTPDBG(SCTP_DEBUG_INPUT1, 137238003Stuexen "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 138237569Stuexen SCTP_STAT_INCR(sctps_hdrops); 139238003Stuexen goto out; 140237569Stuexen } 141163953Srrs if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 142238003Stuexen goto out; 143163953Srrs } 144238003Stuexen ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 145211969Stuexen#if defined(SCTP_WITH_NO_CSUM) 146211969Stuexen SCTP_STAT_INCR(sctps_recvnocrc); 147211969Stuexen#else 148188067Srrs if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 149188067Srrs SCTP_STAT_INCR(sctps_recvhwcrc); 150238003Stuexen compute_crc = 0; 151238003Stuexen } else { 152238003Stuexen SCTP_STAT_INCR(sctps_recvswcrc); 153238003Stuexen compute_crc = 1; 154188067Srrs } 155218400Stuexen#endif 156238003Stuexen sctp_common_input_processing(&m, iphlen, offset, length, 157237715Stuexen (struct sockaddr *)&src, 158237715Stuexen (struct sockaddr *)&dst, 159238003Stuexen sh, ch, 160238003Stuexen#if !defined(SCTP_WITH_NO_CSUM) 161238003Stuexen compute_crc, 162218400Stuexen#endif 163238003Stuexen ecn_bits, 164284515Stuexen mflowtype, mflowid, fibnum, 165237049Stuexen vrf_id, port); 166238003Stuexenout: 167237569Stuexen if (m) { 168169352Srrs sctp_m_freem(m); 169237569Stuexen } 170228907Stuexen return (IPPROTO_DONE); 171163953Srrs} 172163953Srrs 173163953Srrs 174243186Stuexenint 175243186Stuexensctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 176243186Stuexen{ 177243186Stuexen return (sctp6_input_with_port(i_pak, offp, 0)); 178243186Stuexen} 179243186Stuexen 180172156Srrsvoid 181172091Srrssctp6_notify(struct sctp_inpcb *inp, 182172091Srrs struct sctp_tcb *stcb, 183298132Stuexen struct sctp_nets *net, 184298132Stuexen uint8_t icmp6_type, 185298132Stuexen uint8_t icmp6_code, 186319402Stuexen uint32_t next_mtu) 187172091Srrs{ 188237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 189172091Srrs struct socket *so; 190172091Srrs#endif 191298132Stuexen int timer_stopped; 192235360Stuexen 193298132Stuexen switch (icmp6_type) { 194298132Stuexen case ICMP6_DST_UNREACH: 195298132Stuexen if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 196298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 197298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 198298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 199298132Stuexen /* Mark the net unreachable. */ 200298132Stuexen if (net->dest_state & SCTP_ADDR_REACHABLE) { 201298132Stuexen /* Ok that destination is not reachable */ 202298132Stuexen net->dest_state &= ~SCTP_ADDR_REACHABLE; 203298132Stuexen net->dest_state &= ~SCTP_ADDR_PF; 204298132Stuexen sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 205298132Stuexen stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 206298132Stuexen } 207172091Srrs } 208172091Srrs SCTP_TCB_UNLOCK(stcb); 209298132Stuexen break; 210298132Stuexen case ICMP6_PARAM_PROB: 211298132Stuexen /* Treat it like an ABORT. */ 212298132Stuexen if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 213298132Stuexen sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 214237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 215298132Stuexen so = SCTP_INP_SO(inp); 216298132Stuexen atomic_add_int(&stcb->asoc.refcnt, 1); 217298132Stuexen SCTP_TCB_UNLOCK(stcb); 218298132Stuexen SCTP_SOCKET_LOCK(so, 1); 219298132Stuexen SCTP_TCB_LOCK(stcb); 220298132Stuexen atomic_subtract_int(&stcb->asoc.refcnt, 1); 221172091Srrs#endif 222298132Stuexen (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 223298132Stuexen SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 224237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 225298132Stuexen SCTP_SOCKET_UNLOCK(so, 1); 226172091Srrs#endif 227298132Stuexen } else { 228298132Stuexen SCTP_TCB_UNLOCK(stcb); 229298132Stuexen } 230298132Stuexen break; 231298132Stuexen case ICMP6_PACKET_TOO_BIG: 232298132Stuexen if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 233298132Stuexen timer_stopped = 1; 234298132Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 235298132Stuexen SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 236298132Stuexen } else { 237298132Stuexen timer_stopped = 0; 238298132Stuexen } 239298132Stuexen /* Update the path MTU. */ 240319403Stuexen if (net->port) { 241319403Stuexen next_mtu -= sizeof(struct udphdr); 242319403Stuexen } 243298132Stuexen if (net->mtu > next_mtu) { 244298132Stuexen net->mtu = next_mtu; 245298132Stuexen } 246298132Stuexen /* Update the association MTU */ 247298132Stuexen if (stcb->asoc.smallest_mtu > next_mtu) { 248298132Stuexen sctp_pathmtu_adjustment(stcb, next_mtu); 249298132Stuexen } 250298132Stuexen /* Finally, start the PMTU timer if it was running before. */ 251298132Stuexen if (timer_stopped) { 252298132Stuexen sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 253298132Stuexen } 254172091Srrs SCTP_TCB_UNLOCK(stcb); 255298132Stuexen break; 256298132Stuexen default: 257298132Stuexen SCTP_TCB_UNLOCK(stcb); 258298132Stuexen break; 259172091Srrs } 260172091Srrs} 261172091Srrs 262163953Srrsvoid 263171259Sdelphijsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 264163953Srrs{ 265298132Stuexen struct ip6ctlparam *ip6cp; 266298132Stuexen struct sctp_inpcb *inp; 267298132Stuexen struct sctp_tcb *stcb; 268298132Stuexen struct sctp_nets *net; 269163953Srrs struct sctphdr sh; 270298132Stuexen struct sockaddr_in6 src, dst; 271163953Srrs 272163953Srrs if (pktdst->sa_family != AF_INET6 || 273298132Stuexen pktdst->sa_len != sizeof(struct sockaddr_in6)) { 274163953Srrs return; 275298132Stuexen } 276298132Stuexen if ((unsigned)cmd >= PRC_NCMDS) { 277163953Srrs return; 278298132Stuexen } 279163953Srrs if (PRC_IS_REDIRECT(cmd)) { 280163953Srrs d = NULL; 281163953Srrs } else if (inet6ctlerrmap[cmd] == 0) { 282163953Srrs return; 283163953Srrs } 284298132Stuexen /* If the parameter is from icmp6, decode it. */ 285163953Srrs if (d != NULL) { 286163953Srrs ip6cp = (struct ip6ctlparam *)d; 287163953Srrs } else { 288163953Srrs ip6cp = (struct ip6ctlparam *)NULL; 289163953Srrs } 290163953Srrs 291298132Stuexen if (ip6cp != NULL) { 292163953Srrs /* 293163953Srrs * XXX: We assume that when IPV6 is non NULL, M and OFF are 294163953Srrs * valid. 295163953Srrs */ 296298132Stuexen if (ip6cp->ip6c_m == NULL) { 297163953Srrs return; 298298132Stuexen } 299298132Stuexen /* 300298132Stuexen * Check if we can safely examine the ports and the 301298132Stuexen * verification tag of the SCTP common header. 302298132Stuexen */ 303298132Stuexen if (ip6cp->ip6c_m->m_pkthdr.len < 304310773Stuexen (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 305293906Sglebius return; 306298132Stuexen } 307298132Stuexen /* Copy out the port numbers and the verification tag. */ 308163953Srrs bzero(&sh, sizeof(sh)); 309298132Stuexen m_copydata(ip6cp->ip6c_m, 310298132Stuexen ip6cp->ip6c_off, 311298132Stuexen sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 312298132Stuexen (caddr_t)&sh); 313298132Stuexen memset(&src, 0, sizeof(struct sockaddr_in6)); 314298132Stuexen src.sin6_family = AF_INET6; 315298132Stuexen src.sin6_len = sizeof(struct sockaddr_in6); 316298132Stuexen src.sin6_port = sh.src_port; 317298132Stuexen src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 318298132Stuexen if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 319298132Stuexen return; 320298132Stuexen } 321298132Stuexen memset(&dst, 0, sizeof(struct sockaddr_in6)); 322298132Stuexen dst.sin6_family = AF_INET6; 323298132Stuexen dst.sin6_len = sizeof(struct sockaddr_in6); 324298132Stuexen dst.sin6_port = sh.dest_port; 325298132Stuexen dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 326298132Stuexen if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 327298132Stuexen return; 328298132Stuexen } 329163953Srrs inp = NULL; 330163953Srrs net = NULL; 331298132Stuexen stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 332298132Stuexen (struct sockaddr *)&src, 333298132Stuexen &inp, &net, 1, SCTP_DEFAULT_VRFID); 334298132Stuexen if ((stcb != NULL) && 335298132Stuexen (net != NULL) && 336302138Stuexen (inp != NULL)) { 337298132Stuexen /* Check the verification tag */ 338298132Stuexen if (ntohl(sh.v_tag) != 0) { 339298132Stuexen /* 340298132Stuexen * This must be the verification tag used 341298132Stuexen * for sending out packets. We don't 342298132Stuexen * consider packets reflecting the 343298132Stuexen * verification tag. 344298132Stuexen */ 345298132Stuexen if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 346298132Stuexen SCTP_TCB_UNLOCK(stcb); 347298132Stuexen return; 348298132Stuexen } 349163953Srrs } else { 350298132Stuexen if (ip6cp->ip6c_m->m_pkthdr.len >= 351298132Stuexen ip6cp->ip6c_off + sizeof(struct sctphdr) + 352298132Stuexen sizeof(struct sctp_chunkhdr) + 353298132Stuexen offsetof(struct sctp_init, a_rwnd)) { 354298132Stuexen /* 355298132Stuexen * In this case we can check if we 356298132Stuexen * got an INIT chunk and if the 357298132Stuexen * initiate tag matches. 358298132Stuexen */ 359298132Stuexen uint32_t initiate_tag; 360298132Stuexen uint8_t chunk_type; 361298132Stuexen 362298132Stuexen m_copydata(ip6cp->ip6c_m, 363298132Stuexen ip6cp->ip6c_off + 364298132Stuexen sizeof(struct sctphdr), 365298132Stuexen sizeof(uint8_t), 366298132Stuexen (caddr_t)&chunk_type); 367298132Stuexen m_copydata(ip6cp->ip6c_m, 368298132Stuexen ip6cp->ip6c_off + 369298132Stuexen sizeof(struct sctphdr) + 370298132Stuexen sizeof(struct sctp_chunkhdr), 371298132Stuexen sizeof(uint32_t), 372298132Stuexen (caddr_t)&initiate_tag); 373298132Stuexen if ((chunk_type != SCTP_INITIATION) || 374298132Stuexen (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 375298132Stuexen SCTP_TCB_UNLOCK(stcb); 376298132Stuexen return; 377298132Stuexen } 378298132Stuexen } else { 379298132Stuexen SCTP_TCB_UNLOCK(stcb); 380298132Stuexen return; 381298132Stuexen } 382163953Srrs } 383298132Stuexen sctp6_notify(inp, stcb, net, 384298132Stuexen ip6cp->ip6c_icmp6->icmp6_type, 385298132Stuexen ip6cp->ip6c_icmp6->icmp6_code, 386319402Stuexen ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 387163953Srrs } else { 388298132Stuexen if ((stcb == NULL) && (inp != NULL)) { 389163953Srrs /* reduce inp's ref-count */ 390163953Srrs SCTP_INP_WLOCK(inp); 391163953Srrs SCTP_INP_DECR_REF(inp); 392163953Srrs SCTP_INP_WUNLOCK(inp); 393163953Srrs } 394298132Stuexen if (stcb) { 395163953Srrs SCTP_TCB_UNLOCK(stcb); 396298132Stuexen } 397163953Srrs } 398163953Srrs } 399163953Srrs} 400163953Srrs 401163953Srrs/* 402163953Srrs * this routine can probably be collasped into the one in sctp_userreq.c 403163953Srrs * since they do the same thing and now we lookup with a sockaddr 404163953Srrs */ 405163953Srrsstatic int 406163953Srrssctp6_getcred(SYSCTL_HANDLER_ARGS) 407163953Srrs{ 408164085Srrs struct xucred xuc; 409163953Srrs struct sockaddr_in6 addrs[2]; 410163953Srrs struct sctp_inpcb *inp; 411163953Srrs struct sctp_nets *net; 412163953Srrs struct sctp_tcb *stcb; 413164085Srrs int error; 414167598Srrs uint32_t vrf_id; 415163953Srrs 416167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 417167598Srrs 418170587Srwatson error = priv_check(req->td, PRIV_NETINET_GETCRED); 419163953Srrs if (error) 420163953Srrs return (error); 421163953Srrs 422171943Srrs if (req->newlen != sizeof(addrs)) { 423171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 424163953Srrs return (EINVAL); 425171943Srrs } 426171943Srrs if (req->oldlen != sizeof(struct ucred)) { 427171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 428163953Srrs return (EINVAL); 429171943Srrs } 430163953Srrs error = SYSCTL_IN(req, addrs, sizeof(addrs)); 431163953Srrs if (error) 432163953Srrs return (error); 433163953Srrs 434237715Stuexen stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 435237715Stuexen sin6tosa(&addrs[0]), 436167598Srrs &inp, &net, 1, vrf_id); 437163953Srrs if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 438164085Srrs if ((inp != NULL) && (stcb == NULL)) { 439164085Srrs /* reduce ref-count */ 440163953Srrs SCTP_INP_WLOCK(inp); 441163953Srrs SCTP_INP_DECR_REF(inp); 442164085Srrs goto cred_can_cont; 443163953Srrs } 444171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 445164085Srrs error = ENOENT; 446163953Srrs goto out; 447163953Srrs } 448163953Srrs SCTP_TCB_UNLOCK(stcb); 449164085Srrs /* 450164085Srrs * We use the write lock here, only since in the error leg we need 451164085Srrs * it. If we used RLOCK, then we would have to 452164085Srrs * wlock/decr/unlock/rlock. Which in theory could create a hole. 453164085Srrs * Better to use higher wlock. 454164085Srrs */ 455164085Srrs SCTP_INP_WLOCK(inp); 456164085Srrscred_can_cont: 457164085Srrs error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 458164085Srrs if (error) { 459164085Srrs SCTP_INP_WUNLOCK(inp); 460164085Srrs goto out; 461164085Srrs } 462164085Srrs cru2x(inp->sctp_socket->so_cred, &xuc); 463164085Srrs SCTP_INP_WUNLOCK(inp); 464164085Srrs error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 465163953Srrsout: 466163953Srrs return (error); 467163953Srrs} 468163953Srrs 469163953SrrsSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 470163953Srrs 0, 0, 471163953Srrs sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 472163953Srrs 473163953Srrs 474163953Srrs/* This is the same as the sctp_abort() could be made common */ 475163953Srrsstatic void 476163953Srrssctp6_abort(struct socket *so) 477163953Srrs{ 478163953Srrs struct sctp_inpcb *inp; 479163953Srrs uint32_t flags; 480163953Srrs 481163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 482233005Stuexen if (inp == NULL) { 483172091Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 484163953Srrs return; 485172091Srrs } 486163953Srrssctp_must_try_again: 487163953Srrs flags = inp->sctp_flags; 488163953Srrs#ifdef SCTP_LOG_CLOSING 489163953Srrs sctp_log_closing(inp, NULL, 17); 490163953Srrs#endif 491163953Srrs if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 492163953Srrs (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 493163953Srrs#ifdef SCTP_LOG_CLOSING 494163953Srrs sctp_log_closing(inp, NULL, 16); 495163953Srrs#endif 496169380Srrs sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 497169380Srrs SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 498163953Srrs SOCK_LOCK(so); 499167695Srrs SCTP_SB_CLEAR(so->so_snd); 500163953Srrs /* 501163953Srrs * same for the rcv ones, they are only here for the 502163953Srrs * accounting/select. 503163953Srrs */ 504167695Srrs SCTP_SB_CLEAR(so->so_rcv); 505167695Srrs /* Now null out the reference, we are completely detached. */ 506163953Srrs so->so_pcb = NULL; 507163953Srrs SOCK_UNLOCK(so); 508163953Srrs } else { 509163953Srrs flags = inp->sctp_flags; 510163953Srrs if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 511163953Srrs goto sctp_must_try_again; 512163953Srrs } 513163953Srrs } 514163953Srrs return; 515163953Srrs} 516163953Srrs 517163953Srrsstatic int 518228653Stuexensctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 519163953Srrs{ 520163953Srrs struct in6pcb *inp6; 521166086Srrs int error; 522163953Srrs struct sctp_inpcb *inp; 523170205Srrs uint32_t vrf_id = SCTP_DEFAULT_VRFID; 524163953Srrs 525163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 526171943Srrs if (inp != NULL) { 527171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 528228907Stuexen return (EINVAL); 529171943Srrs } 530163953Srrs if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 531179783Srrs error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 532163953Srrs if (error) 533228907Stuexen return (error); 534163953Srrs } 535170205Srrs error = sctp_inpcb_alloc(so, vrf_id); 536163953Srrs if (error) 537228907Stuexen return (error); 538163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 539170205Srrs SCTP_INP_WLOCK(inp); 540163953Srrs inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 541163953Srrs inp6 = (struct in6pcb *)inp; 542163953Srrs 543163953Srrs inp6->inp_vflag |= INP_IPV6; 544163953Srrs inp6->in6p_hops = -1; /* use kernel default */ 545163953Srrs inp6->in6p_cksum = -1; /* just to be sure */ 546163953Srrs#ifdef INET 547163953Srrs /* 548163953Srrs * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 549163953Srrs * socket as well, because the socket may be bound to an IPv6 550163953Srrs * wildcard address, which may match an IPv4-mapped IPv6 address. 551163953Srrs */ 552197288Srrs inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 553163953Srrs#endif 554170205Srrs SCTP_INP_WUNLOCK(inp); 555228907Stuexen return (0); 556163953Srrs} 557163953Srrs 558163953Srrsstatic int 559163953Srrssctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 560163953Srrs{ 561163953Srrs struct sctp_inpcb *inp; 562163953Srrs struct in6pcb *inp6; 563166086Srrs int error; 564163953Srrs 565163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 566233005Stuexen if (inp == NULL) { 567171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 568228907Stuexen return (EINVAL); 569171943Srrs } 570170056Srrs if (addr) { 571221249Stuexen switch (addr->sa_family) { 572221249Stuexen#ifdef INET 573221249Stuexen case AF_INET: 574221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 575221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 576228907Stuexen return (EINVAL); 577221249Stuexen } 578221249Stuexen break; 579221249Stuexen#endif 580221249Stuexen#ifdef INET6 581221249Stuexen case AF_INET6: 582221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 583221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 584228907Stuexen return (EINVAL); 585221249Stuexen } 586221249Stuexen break; 587221249Stuexen#endif 588221249Stuexen default: 589171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 590228907Stuexen return (EINVAL); 591170056Srrs } 592170056Srrs } 593163953Srrs inp6 = (struct in6pcb *)inp; 594163953Srrs inp6->inp_vflag &= ~INP_IPV4; 595163953Srrs inp6->inp_vflag |= INP_IPV6; 596166023Srrs if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 597221249Stuexen switch (addr->sa_family) { 598221249Stuexen#ifdef INET 599221249Stuexen case AF_INET: 600163953Srrs /* binding v4 addr to v6 socket, so reset flags */ 601163953Srrs inp6->inp_vflag |= INP_IPV4; 602163953Srrs inp6->inp_vflag &= ~INP_IPV6; 603221249Stuexen break; 604221249Stuexen#endif 605221249Stuexen#ifdef INET6 606221249Stuexen case AF_INET6: 607221249Stuexen { 608221249Stuexen struct sockaddr_in6 *sin6_p; 609163953Srrs 610221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 611163953Srrs 612221249Stuexen if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 613221249Stuexen inp6->inp_vflag |= INP_IPV4; 614221249Stuexen } 615221249Stuexen#ifdef INET 616221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 617221249Stuexen struct sockaddr_in sin; 618163953Srrs 619221249Stuexen in6_sin6_2_sin(&sin, sin6_p); 620221249Stuexen inp6->inp_vflag |= INP_IPV4; 621221249Stuexen inp6->inp_vflag &= ~INP_IPV6; 622221249Stuexen error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 623228907Stuexen return (error); 624221249Stuexen } 625221249Stuexen#endif 626221249Stuexen break; 627163953Srrs } 628221249Stuexen#endif 629221249Stuexen default: 630221249Stuexen break; 631163953Srrs } 632163953Srrs } else if (addr != NULL) { 633221249Stuexen struct sockaddr_in6 *sin6_p; 634221249Stuexen 635163953Srrs /* IPV6_V6ONLY socket */ 636221249Stuexen#ifdef INET 637163953Srrs if (addr->sa_family == AF_INET) { 638163953Srrs /* can't bind v4 addr to v6 only socket! */ 639171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 640228907Stuexen return (EINVAL); 641221249Stuexen } 642221249Stuexen#endif 643221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 644163953Srrs 645221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 646221249Stuexen /* can't bind v4-mapped addrs either! */ 647221249Stuexen /* NOTE: we don't support SIIT */ 648221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 649228907Stuexen return (EINVAL); 650163953Srrs } 651163953Srrs } 652171572Srrs error = sctp_inpcb_bind(so, addr, NULL, p); 653228907Stuexen return (error); 654163953Srrs} 655163953Srrs 656163953Srrs 657163953Srrsstatic void 658163953Srrssctp6_close(struct socket *so) 659163953Srrs{ 660171990Srrs sctp_close(so); 661163953Srrs} 662163953Srrs 663167598Srrs/* This could be made common with sctp_detach() since they are identical */ 664163953Srrs 665168709Srrsstatic 666168709Srrsint 667163953Srrssctp6_disconnect(struct socket *so) 668163953Srrs{ 669171990Srrs return (sctp_disconnect(so)); 670163953Srrs} 671163953Srrs 672168709Srrs 673163953Srrsint 674163953Srrssctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 675163953Srrs struct mbuf *control, struct thread *p); 676163953Srrs 677163953Srrs 678163953Srrsstatic int 679163953Srrssctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 680163953Srrs struct mbuf *control, struct thread *p) 681163953Srrs{ 682163953Srrs struct sctp_inpcb *inp; 683163953Srrs struct in6pcb *inp6; 684163953Srrs 685163953Srrs#ifdef INET 686163953Srrs struct sockaddr_in6 *sin6; 687163953Srrs#endif /* INET */ 688163953Srrs /* No SPL needed since sctp_output does this */ 689163953Srrs 690163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 691163953Srrs if (inp == NULL) { 692163953Srrs if (control) { 693169352Srrs SCTP_RELEASE_PKT(control); 694163953Srrs control = NULL; 695163953Srrs } 696169352Srrs SCTP_RELEASE_PKT(m); 697171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 698228907Stuexen return (EINVAL); 699163953Srrs } 700163953Srrs inp6 = (struct in6pcb *)inp; 701163953Srrs /* 702163953Srrs * For the TCP model we may get a NULL addr, if we are a connected 703163953Srrs * socket thats ok. 704163953Srrs */ 705163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 706163953Srrs (addr == NULL)) { 707163953Srrs goto connected_type; 708163953Srrs } 709163953Srrs if (addr == NULL) { 710169352Srrs SCTP_RELEASE_PKT(m); 711163953Srrs if (control) { 712169352Srrs SCTP_RELEASE_PKT(control); 713163953Srrs control = NULL; 714163953Srrs } 715171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 716163953Srrs return (EDESTADDRREQ); 717163953Srrs } 718163953Srrs#ifdef INET 719163953Srrs sin6 = (struct sockaddr_in6 *)addr; 720166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 721163953Srrs /* 722163953Srrs * if IPV6_V6ONLY flag, we discard datagrams destined to a 723163953Srrs * v4 addr or v4-mapped addr 724163953Srrs */ 725163953Srrs if (addr->sa_family == AF_INET) { 726171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 727228907Stuexen return (EINVAL); 728163953Srrs } 729163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 730171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 731228907Stuexen return (EINVAL); 732163953Srrs } 733163953Srrs } 734163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 735250466Stuexen struct sockaddr_in sin; 736163953Srrs 737250466Stuexen /* convert v4-mapped into v4 addr and send */ 738250466Stuexen in6_sin6_2_sin(&sin, sin6); 739250466Stuexen return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 740163953Srrs } 741163953Srrs#endif /* INET */ 742163953Srrsconnected_type: 743163953Srrs /* now what about control */ 744163953Srrs if (control) { 745163953Srrs if (inp->control) { 746169420Srrs SCTP_PRINTF("huh? control set?\n"); 747169352Srrs SCTP_RELEASE_PKT(inp->control); 748163953Srrs inp->control = NULL; 749163953Srrs } 750163953Srrs inp->control = control; 751163953Srrs } 752163953Srrs /* Place the data */ 753163953Srrs if (inp->pkt) { 754165647Srrs SCTP_BUF_NEXT(inp->pkt_last) = m; 755163953Srrs inp->pkt_last = m; 756163953Srrs } else { 757163953Srrs inp->pkt_last = inp->pkt = m; 758163953Srrs } 759163953Srrs if ( 760163953Srrs /* FreeBSD and MacOSX uses a flag passed */ 761163953Srrs ((flags & PRUS_MORETOCOME) == 0) 762163953Srrs ) { 763163953Srrs /* 764163953Srrs * note with the current version this code will only be used 765163953Srrs * by OpenBSD, NetBSD and FreeBSD have methods for 766163953Srrs * re-defining sosend() to use sctp_sosend(). One can 767163953Srrs * optionaly switch back to this code (by changing back the 768163953Srrs * defininitions but this is not advisable. 769163953Srrs */ 770163953Srrs int ret; 771163953Srrs 772163953Srrs ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 773163953Srrs inp->pkt = NULL; 774163953Srrs inp->control = NULL; 775163953Srrs return (ret); 776163953Srrs } else { 777163953Srrs return (0); 778163953Srrs } 779163953Srrs} 780163953Srrs 781163953Srrsstatic int 782163953Srrssctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 783163953Srrs{ 784167598Srrs uint32_t vrf_id; 785163953Srrs int error = 0; 786163953Srrs struct sctp_inpcb *inp; 787163953Srrs struct sctp_tcb *stcb; 788163953Srrs#ifdef INET 789257555Stuexen struct in6pcb *inp6; 790163953Srrs struct sockaddr_in6 *sin6; 791271221Stuexen union sctp_sockstore store; 792221249Stuexen#endif 793163953Srrs 794257555Stuexen#ifdef INET 795163953Srrs inp6 = (struct in6pcb *)so->so_pcb; 796257555Stuexen#endif 797163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 798233005Stuexen if (inp == NULL) { 799171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 800163953Srrs return (ECONNRESET); /* I made the same as TCP since we are 801163953Srrs * not setup? */ 802163953Srrs } 803170056Srrs if (addr == NULL) { 804171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 805170056Srrs return (EINVAL); 806170056Srrs } 807221249Stuexen switch (addr->sa_family) { 808221249Stuexen#ifdef INET 809221249Stuexen case AF_INET: 810221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 811221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 812221249Stuexen return (EINVAL); 813221249Stuexen } 814221249Stuexen break; 815221249Stuexen#endif 816221249Stuexen#ifdef INET6 817221249Stuexen case AF_INET6: 818221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 819221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 820221249Stuexen return (EINVAL); 821221249Stuexen } 822221249Stuexen break; 823221249Stuexen#endif 824221249Stuexen default: 825171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 826170056Srrs return (EINVAL); 827170056Srrs } 828221249Stuexen 829168299Srrs vrf_id = inp->def_vrf_id; 830163953Srrs SCTP_ASOC_CREATE_LOCK(inp); 831163953Srrs SCTP_INP_RLOCK(inp); 832163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 833163953Srrs SCTP_PCB_FLAGS_UNBOUND) { 834163953Srrs /* Bind a ephemeral port */ 835163953Srrs SCTP_INP_RUNLOCK(inp); 836163953Srrs error = sctp6_bind(so, NULL, p); 837163953Srrs if (error) { 838163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 839163953Srrs 840163953Srrs return (error); 841163953Srrs } 842163953Srrs SCTP_INP_RLOCK(inp); 843163953Srrs } 844163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 845163953Srrs (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 846163953Srrs /* We are already connected AND the TCP model */ 847163953Srrs SCTP_INP_RUNLOCK(inp); 848163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 849171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 850163953Srrs return (EADDRINUSE); 851163953Srrs } 852163953Srrs#ifdef INET 853163953Srrs sin6 = (struct sockaddr_in6 *)addr; 854166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 855163953Srrs /* 856163953Srrs * if IPV6_V6ONLY flag, ignore connections destined to a v4 857163953Srrs * addr or v4-mapped addr 858163953Srrs */ 859163953Srrs if (addr->sa_family == AF_INET) { 860163953Srrs SCTP_INP_RUNLOCK(inp); 861163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 862171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 863228907Stuexen return (EINVAL); 864163953Srrs } 865163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 866163953Srrs SCTP_INP_RUNLOCK(inp); 867163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 868171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 869228907Stuexen return (EINVAL); 870163953Srrs } 871163953Srrs } 872163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 873250466Stuexen /* convert v4-mapped into v4 addr */ 874271221Stuexen in6_sin6_2_sin(&store.sin, sin6); 875271221Stuexen addr = &store.sa; 876221411Stuexen } 877163953Srrs#endif /* INET */ 878163953Srrs /* Now do we connect? */ 879163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 880163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 881169420Srrs if (stcb) { 882163953Srrs SCTP_TCB_UNLOCK(stcb); 883169420Srrs } 884163953Srrs SCTP_INP_RUNLOCK(inp); 885163953Srrs } else { 886163953Srrs SCTP_INP_RUNLOCK(inp); 887163953Srrs SCTP_INP_WLOCK(inp); 888163953Srrs SCTP_INP_INCR_REF(inp); 889163953Srrs SCTP_INP_WUNLOCK(inp); 890163953Srrs stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 891163953Srrs if (stcb == NULL) { 892163953Srrs SCTP_INP_WLOCK(inp); 893163953Srrs SCTP_INP_DECR_REF(inp); 894163953Srrs SCTP_INP_WUNLOCK(inp); 895163953Srrs } 896163953Srrs } 897163953Srrs 898163953Srrs if (stcb != NULL) { 899163953Srrs /* Already have or am bring up an association */ 900163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 901163953Srrs SCTP_TCB_UNLOCK(stcb); 902171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 903163953Srrs return (EALREADY); 904163953Srrs } 905163953Srrs /* We are GOOD to go */ 906298902Stuexen stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 907298902Stuexen inp->sctp_ep.pre_open_stream_count, 908298902Stuexen inp->sctp_ep.port, p); 909163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 910163953Srrs if (stcb == NULL) { 911163953Srrs /* Gak! no memory */ 912163953Srrs return (error); 913163953Srrs } 914163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 915163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 916163953Srrs /* Set the connected flag so we can queue data */ 917163953Srrs soisconnecting(so); 918163953Srrs } 919163953Srrs stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 920169420Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 921163953Srrs 922163953Srrs /* initialize authentication parameters for the assoc */ 923163953Srrs sctp_initialize_auth_params(inp, stcb); 924163953Srrs 925172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 926163953Srrs SCTP_TCB_UNLOCK(stcb); 927228907Stuexen return (error); 928163953Srrs} 929163953Srrs 930163953Srrsstatic int 931163953Srrssctp6_getaddr(struct socket *so, struct sockaddr **addr) 932163953Srrs{ 933163953Srrs struct sockaddr_in6 *sin6; 934163953Srrs struct sctp_inpcb *inp; 935167598Srrs uint32_t vrf_id; 936167598Srrs struct sctp_ifa *sctp_ifa; 937163953Srrs 938163953Srrs int error; 939163953Srrs 940163953Srrs /* 941163953Srrs * Do the malloc first in case it blocks. 942163953Srrs */ 943221249Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 944211944Stuexen if (sin6 == NULL) 945228907Stuexen return (ENOMEM); 946163953Srrs sin6->sin6_family = AF_INET6; 947163953Srrs sin6->sin6_len = sizeof(*sin6); 948163953Srrs 949163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 950163953Srrs if (inp == NULL) { 951163953Srrs SCTP_FREE_SONAME(sin6); 952171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 953228907Stuexen return (ECONNRESET); 954163953Srrs } 955163953Srrs SCTP_INP_RLOCK(inp); 956163953Srrs sin6->sin6_port = inp->sctp_lport; 957163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 958163953Srrs /* For the bound all case you get back 0 */ 959163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 960163953Srrs struct sctp_tcb *stcb; 961163953Srrs struct sockaddr_in6 *sin_a6; 962163953Srrs struct sctp_nets *net; 963163953Srrs int fnd; 964163953Srrs 965163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 966163953Srrs if (stcb == NULL) { 967295771Stuexen SCTP_INP_RUNLOCK(inp); 968295929Stuexen SCTP_FREE_SONAME(sin6); 969295771Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 970295771Stuexen return (ENOENT); 971163953Srrs } 972163953Srrs fnd = 0; 973163953Srrs sin_a6 = NULL; 974163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 975163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 976164085Srrs if (sin_a6 == NULL) 977164085Srrs /* this will make coverity happy */ 978164085Srrs continue; 979164085Srrs 980163953Srrs if (sin_a6->sin6_family == AF_INET6) { 981163953Srrs fnd = 1; 982163953Srrs break; 983163953Srrs } 984163953Srrs } 985163953Srrs if ((!fnd) || (sin_a6 == NULL)) { 986163953Srrs /* punt */ 987295771Stuexen SCTP_INP_RUNLOCK(inp); 988295929Stuexen SCTP_FREE_SONAME(sin6); 989295771Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 990295771Stuexen return (ENOENT); 991163953Srrs } 992168299Srrs vrf_id = inp->def_vrf_id; 993310773Stuexen sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 994167598Srrs if (sctp_ifa) { 995167598Srrs sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 996167598Srrs } 997163953Srrs } else { 998163953Srrs /* For the bound all case you get back 0 */ 999163953Srrs memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1000163953Srrs } 1001163953Srrs } else { 1002163953Srrs /* Take the first IPv6 address in the list */ 1003163953Srrs struct sctp_laddr *laddr; 1004163953Srrs int fnd = 0; 1005163953Srrs 1006163953Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1007167598Srrs if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1008163953Srrs struct sockaddr_in6 *sin_a; 1009163953Srrs 1010271221Stuexen sin_a = &laddr->ifa->address.sin6; 1011163953Srrs sin6->sin6_addr = sin_a->sin6_addr; 1012163953Srrs fnd = 1; 1013163953Srrs break; 1014163953Srrs } 1015163953Srrs } 1016163953Srrs if (!fnd) { 1017163953Srrs SCTP_FREE_SONAME(sin6); 1018163953Srrs SCTP_INP_RUNLOCK(inp); 1019171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1020228907Stuexen return (ENOENT); 1021163953Srrs } 1022163953Srrs } 1023163953Srrs SCTP_INP_RUNLOCK(inp); 1024163953Srrs /* Scoping things for v6 */ 1025164085Srrs if ((error = sa6_recoverscope(sin6)) != 0) { 1026164085Srrs SCTP_FREE_SONAME(sin6); 1027163953Srrs return (error); 1028164085Srrs } 1029163953Srrs (*addr) = (struct sockaddr *)sin6; 1030163953Srrs return (0); 1031163953Srrs} 1032163953Srrs 1033163953Srrsstatic int 1034163953Srrssctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1035163953Srrs{ 1036231895Stuexen struct sockaddr_in6 *sin6; 1037163953Srrs int fnd; 1038163953Srrs struct sockaddr_in6 *sin_a6; 1039163953Srrs struct sctp_inpcb *inp; 1040163953Srrs struct sctp_tcb *stcb; 1041163953Srrs struct sctp_nets *net; 1042163953Srrs int error; 1043163953Srrs 1044228907Stuexen /* Do the malloc first in case it blocks. */ 1045163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1046211944Stuexen if (sin6 == NULL) 1047211944Stuexen return (ENOMEM); 1048163953Srrs sin6->sin6_family = AF_INET6; 1049163953Srrs sin6->sin6_len = sizeof(*sin6); 1050163953Srrs 1051163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1052228907Stuexen if ((inp == NULL) || 1053228907Stuexen ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1054228907Stuexen /* UDP type and listeners will drop out here */ 1055163953Srrs SCTP_FREE_SONAME(sin6); 1056228907Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1057228907Stuexen return (ENOTCONN); 1058163953Srrs } 1059163953Srrs SCTP_INP_RLOCK(inp); 1060163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1061169420Srrs if (stcb) { 1062163953Srrs SCTP_TCB_LOCK(stcb); 1063169420Srrs } 1064163953Srrs SCTP_INP_RUNLOCK(inp); 1065163953Srrs if (stcb == NULL) { 1066163953Srrs SCTP_FREE_SONAME(sin6); 1067171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1068228907Stuexen return (ECONNRESET); 1069163953Srrs } 1070163953Srrs fnd = 0; 1071163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1072163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1073163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1074163953Srrs fnd = 1; 1075163953Srrs sin6->sin6_port = stcb->rport; 1076163953Srrs sin6->sin6_addr = sin_a6->sin6_addr; 1077163953Srrs break; 1078163953Srrs } 1079163953Srrs } 1080163953Srrs SCTP_TCB_UNLOCK(stcb); 1081163953Srrs if (!fnd) { 1082163953Srrs /* No IPv4 address */ 1083163953Srrs SCTP_FREE_SONAME(sin6); 1084171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1085228907Stuexen return (ENOENT); 1086163953Srrs } 1087275868Stuexen if ((error = sa6_recoverscope(sin6)) != 0) { 1088275868Stuexen SCTP_FREE_SONAME(sin6); 1089275868Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1090163953Srrs return (error); 1091275868Stuexen } 1092163953Srrs *addr = (struct sockaddr *)sin6; 1093163953Srrs return (0); 1094163953Srrs} 1095163953Srrs 1096163953Srrsstatic int 1097163953Srrssctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1098163953Srrs{ 1099163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1100166086Srrs int error; 1101163953Srrs 1102171943Srrs if (inp6 == NULL) { 1103171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1104228907Stuexen return (EINVAL); 1105171943Srrs } 1106163953Srrs /* allow v6 addresses precedence */ 1107163953Srrs error = sctp6_getaddr(so, nam); 1108221249Stuexen#ifdef INET 1109163953Srrs if (error) { 1110295771Stuexen struct sockaddr_in6 *sin6; 1111295771Stuexen 1112163953Srrs /* try v4 next if v6 failed */ 1113163953Srrs error = sctp_ingetaddr(so, nam); 1114163953Srrs if (error) { 1115163953Srrs return (error); 1116163953Srrs } 1117295771Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1118295771Stuexen if (sin6 == NULL) { 1119295771Stuexen SCTP_FREE_SONAME(*nam); 1120295771Stuexen return (ENOMEM); 1121163953Srrs } 1122295771Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1123295771Stuexen SCTP_FREE_SONAME(*nam); 1124295771Stuexen *nam = (struct sockaddr *)sin6; 1125163953Srrs } 1126221249Stuexen#endif 1127163953Srrs return (error); 1128163953Srrs} 1129163953Srrs 1130163953Srrs 1131163953Srrsstatic int 1132163953Srrssctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1133163953Srrs{ 1134163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1135166086Srrs int error; 1136163953Srrs 1137171943Srrs if (inp6 == NULL) { 1138171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1139228907Stuexen return (EINVAL); 1140171943Srrs } 1141163953Srrs /* allow v6 addresses precedence */ 1142163953Srrs error = sctp6_peeraddr(so, nam); 1143221249Stuexen#ifdef INET 1144163953Srrs if (error) { 1145295771Stuexen struct sockaddr_in6 *sin6; 1146295771Stuexen 1147163953Srrs /* try v4 next if v6 failed */ 1148163953Srrs error = sctp_peeraddr(so, nam); 1149163953Srrs if (error) { 1150163953Srrs return (error); 1151163953Srrs } 1152295771Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1153295771Stuexen if (sin6 == NULL) { 1154295771Stuexen SCTP_FREE_SONAME(*nam); 1155295771Stuexen return (ENOMEM); 1156163953Srrs } 1157295771Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1158295771Stuexen SCTP_FREE_SONAME(*nam); 1159295771Stuexen *nam = (struct sockaddr *)sin6; 1160163953Srrs } 1161221249Stuexen#endif 1162228907Stuexen return (error); 1163163953Srrs} 1164163953Srrs 1165163953Srrsstruct pr_usrreqs sctp6_usrreqs = { 1166163953Srrs .pru_abort = sctp6_abort, 1167163953Srrs .pru_accept = sctp_accept, 1168163953Srrs .pru_attach = sctp6_attach, 1169163953Srrs .pru_bind = sctp6_bind, 1170163953Srrs .pru_connect = sctp6_connect, 1171163953Srrs .pru_control = in6_control, 1172163953Srrs .pru_close = sctp6_close, 1173163953Srrs .pru_detach = sctp6_close, 1174163953Srrs .pru_sopoll = sopoll_generic, 1175178201Srrs .pru_flush = sctp_flush, 1176163953Srrs .pru_disconnect = sctp6_disconnect, 1177163953Srrs .pru_listen = sctp_listen, 1178163953Srrs .pru_peeraddr = sctp6_getpeeraddr, 1179163953Srrs .pru_send = sctp6_send, 1180163953Srrs .pru_shutdown = sctp_shutdown, 1181163953Srrs .pru_sockaddr = sctp6_in6getaddr, 1182163953Srrs .pru_sosend = sctp_sosend, 1183163953Srrs .pru_soreceive = sctp_soreceive 1184163953Srrs}; 1185238501Stuexen 1186238501Stuexen#endif 1187