sctp6_usrreq.c revision 332636
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 332636 2018-04-16 21:20:34Z 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; 72238003Stuexen uint8_t compute_crc; 73238003Stuexen uint32_t mflowid; 74275483Stuexen uint8_t mflowtype; 75284515Stuexen uint16_t fibnum; 76163953Srrs 77237569Stuexen iphlen = *offp; 78169352Srrs if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 79169352Srrs SCTP_RELEASE_PKT(*i_pak); 80237569Stuexen return (IPPROTO_DONE); 81169352Srrs } 82168709Srrs m = SCTP_HEADER_TO_CHAIN(*i_pak); 83237569Stuexen#ifdef SCTP_MBUF_LOGGING 84237569Stuexen /* Log in any input mbufs */ 85237569Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 86276914Stuexen sctp_log_mbc(m, SCTP_MBUF_INPUT); 87237569Stuexen } 88237569Stuexen#endif 89237540Stuexen#ifdef SCTP_PACKET_LOGGING 90237540Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 91237540Stuexen sctp_packet_log(m); 92237540Stuexen } 93170091Srrs#endif 94238003Stuexen SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 95254854Stuexen "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 96238003Stuexen m->m_pkthdr.len, 97238003Stuexen if_name(m->m_pkthdr.rcvif), 98254854Stuexen (int)m->m_pkthdr.csum_flags, CSUM_BITS); 99275483Stuexen mflowid = m->m_pkthdr.flowid; 100275483Stuexen mflowtype = M_HASHTYPE_GET(m); 101284515Stuexen fibnum = M_GETFIB(m); 102237569Stuexen SCTP_STAT_INCR(sctps_recvpackets); 103237569Stuexen SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 104237569Stuexen /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 105238003Stuexen offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 106163953Srrs ip6 = mtod(m, struct ip6_hdr *); 107237569Stuexen IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 108237569Stuexen (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 109163953Srrs if (sh == NULL) { 110163953Srrs SCTP_STAT_INCR(sctps_hdrops); 111228907Stuexen return (IPPROTO_DONE); 112163953Srrs } 113163953Srrs ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 114237569Stuexen offset -= sizeof(struct sctp_chunkhdr); 115237715Stuexen memset(&src, 0, sizeof(struct sockaddr_in6)); 116237715Stuexen src.sin6_family = AF_INET6; 117237715Stuexen src.sin6_len = sizeof(struct sockaddr_in6); 118237715Stuexen src.sin6_port = sh->src_port; 119237715Stuexen src.sin6_addr = ip6->ip6_src; 120237715Stuexen if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 121238003Stuexen goto out; 122237715Stuexen } 123237715Stuexen memset(&dst, 0, sizeof(struct sockaddr_in6)); 124237715Stuexen dst.sin6_family = AF_INET6; 125237715Stuexen dst.sin6_len = sizeof(struct sockaddr_in6); 126237715Stuexen dst.sin6_port = sh->dest_port; 127237715Stuexen dst.sin6_addr = ip6->ip6_dst; 128237715Stuexen if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 129238003Stuexen goto out; 130237715Stuexen } 131237569Stuexen length = ntohs(ip6->ip6_plen) + iphlen; 132237569Stuexen /* Validate mbuf chain length with IP payload length. */ 133238003Stuexen if (SCTP_HEADER_LEN(m) != length) { 134237569Stuexen SCTPDBG(SCTP_DEBUG_INPUT1, 135238003Stuexen "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 136237569Stuexen SCTP_STAT_INCR(sctps_hdrops); 137238003Stuexen goto out; 138237569Stuexen } 139163953Srrs if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 140238003Stuexen goto out; 141163953Srrs } 142238003Stuexen ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 143188067Srrs if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 144188067Srrs SCTP_STAT_INCR(sctps_recvhwcrc); 145238003Stuexen compute_crc = 0; 146238003Stuexen } else { 147238003Stuexen SCTP_STAT_INCR(sctps_recvswcrc); 148238003Stuexen compute_crc = 1; 149188067Srrs } 150238003Stuexen sctp_common_input_processing(&m, iphlen, offset, length, 151237715Stuexen (struct sockaddr *)&src, 152237715Stuexen (struct sockaddr *)&dst, 153238003Stuexen sh, ch, 154238003Stuexen compute_crc, 155238003Stuexen ecn_bits, 156284515Stuexen mflowtype, mflowid, fibnum, 157237049Stuexen vrf_id, port); 158238003Stuexenout: 159237569Stuexen if (m) { 160169352Srrs sctp_m_freem(m); 161237569Stuexen } 162228907Stuexen return (IPPROTO_DONE); 163163953Srrs} 164163953Srrs 165163953Srrs 166243186Stuexenint 167243186Stuexensctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 168243186Stuexen{ 169243186Stuexen return (sctp6_input_with_port(i_pak, offp, 0)); 170243186Stuexen} 171243186Stuexen 172172156Srrsvoid 173172091Srrssctp6_notify(struct sctp_inpcb *inp, 174172091Srrs struct sctp_tcb *stcb, 175298132Stuexen struct sctp_nets *net, 176298132Stuexen uint8_t icmp6_type, 177298132Stuexen uint8_t icmp6_code, 178319402Stuexen uint32_t next_mtu) 179172091Srrs{ 180237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 181172091Srrs struct socket *so; 182172091Srrs#endif 183298132Stuexen int timer_stopped; 184235360Stuexen 185298132Stuexen switch (icmp6_type) { 186298132Stuexen case ICMP6_DST_UNREACH: 187298132Stuexen if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 188298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 189298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 190298132Stuexen (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 191298132Stuexen /* Mark the net unreachable. */ 192298132Stuexen if (net->dest_state & SCTP_ADDR_REACHABLE) { 193298132Stuexen /* Ok that destination is not reachable */ 194298132Stuexen net->dest_state &= ~SCTP_ADDR_REACHABLE; 195298132Stuexen net->dest_state &= ~SCTP_ADDR_PF; 196298132Stuexen sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 197298132Stuexen stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 198298132Stuexen } 199172091Srrs } 200172091Srrs SCTP_TCB_UNLOCK(stcb); 201298132Stuexen break; 202298132Stuexen case ICMP6_PARAM_PROB: 203298132Stuexen /* Treat it like an ABORT. */ 204298132Stuexen if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 205298132Stuexen sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 206237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 207298132Stuexen so = SCTP_INP_SO(inp); 208298132Stuexen atomic_add_int(&stcb->asoc.refcnt, 1); 209298132Stuexen SCTP_TCB_UNLOCK(stcb); 210298132Stuexen SCTP_SOCKET_LOCK(so, 1); 211298132Stuexen SCTP_TCB_LOCK(stcb); 212298132Stuexen atomic_subtract_int(&stcb->asoc.refcnt, 1); 213172091Srrs#endif 214298132Stuexen (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 215298132Stuexen SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 216237565Stuexen#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 217298132Stuexen SCTP_SOCKET_UNLOCK(so, 1); 218172091Srrs#endif 219298132Stuexen } else { 220298132Stuexen SCTP_TCB_UNLOCK(stcb); 221298132Stuexen } 222298132Stuexen break; 223298132Stuexen case ICMP6_PACKET_TOO_BIG: 224332636Stuexen if (net->dest_state & SCTP_ADDR_NO_PMTUD) { 225332222Stuexen SCTP_TCB_UNLOCK(stcb); 226332222Stuexen break; 227332222Stuexen } 228298132Stuexen if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 229298132Stuexen timer_stopped = 1; 230298132Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 231298132Stuexen SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 232298132Stuexen } else { 233298132Stuexen timer_stopped = 0; 234298132Stuexen } 235298132Stuexen /* Update the path MTU. */ 236319403Stuexen if (net->port) { 237319403Stuexen next_mtu -= sizeof(struct udphdr); 238319403Stuexen } 239298132Stuexen if (net->mtu > next_mtu) { 240298132Stuexen net->mtu = next_mtu; 241298132Stuexen } 242298132Stuexen /* Update the association MTU */ 243298132Stuexen if (stcb->asoc.smallest_mtu > next_mtu) { 244298132Stuexen sctp_pathmtu_adjustment(stcb, next_mtu); 245298132Stuexen } 246298132Stuexen /* Finally, start the PMTU timer if it was running before. */ 247298132Stuexen if (timer_stopped) { 248298132Stuexen sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 249298132Stuexen } 250172091Srrs SCTP_TCB_UNLOCK(stcb); 251298132Stuexen break; 252298132Stuexen default: 253298132Stuexen SCTP_TCB_UNLOCK(stcb); 254298132Stuexen break; 255172091Srrs } 256172091Srrs} 257172091Srrs 258163953Srrsvoid 259171259Sdelphijsctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 260163953Srrs{ 261298132Stuexen struct ip6ctlparam *ip6cp; 262298132Stuexen struct sctp_inpcb *inp; 263298132Stuexen struct sctp_tcb *stcb; 264298132Stuexen struct sctp_nets *net; 265163953Srrs struct sctphdr sh; 266298132Stuexen struct sockaddr_in6 src, dst; 267163953Srrs 268163953Srrs if (pktdst->sa_family != AF_INET6 || 269298132Stuexen pktdst->sa_len != sizeof(struct sockaddr_in6)) { 270163953Srrs return; 271298132Stuexen } 272298132Stuexen if ((unsigned)cmd >= PRC_NCMDS) { 273163953Srrs return; 274298132Stuexen } 275163953Srrs if (PRC_IS_REDIRECT(cmd)) { 276163953Srrs d = NULL; 277163953Srrs } else if (inet6ctlerrmap[cmd] == 0) { 278163953Srrs return; 279163953Srrs } 280298132Stuexen /* If the parameter is from icmp6, decode it. */ 281163953Srrs if (d != NULL) { 282163953Srrs ip6cp = (struct ip6ctlparam *)d; 283163953Srrs } else { 284163953Srrs ip6cp = (struct ip6ctlparam *)NULL; 285163953Srrs } 286163953Srrs 287298132Stuexen if (ip6cp != NULL) { 288163953Srrs /* 289163953Srrs * XXX: We assume that when IPV6 is non NULL, M and OFF are 290163953Srrs * valid. 291163953Srrs */ 292298132Stuexen if (ip6cp->ip6c_m == NULL) { 293163953Srrs return; 294298132Stuexen } 295298132Stuexen /* 296298132Stuexen * Check if we can safely examine the ports and the 297298132Stuexen * verification tag of the SCTP common header. 298298132Stuexen */ 299298132Stuexen if (ip6cp->ip6c_m->m_pkthdr.len < 300310773Stuexen (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 301293906Sglebius return; 302298132Stuexen } 303298132Stuexen /* Copy out the port numbers and the verification tag. */ 304332172Stuexen memset(&sh, 0, sizeof(sh)); 305298132Stuexen m_copydata(ip6cp->ip6c_m, 306298132Stuexen ip6cp->ip6c_off, 307298132Stuexen sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 308298132Stuexen (caddr_t)&sh); 309298132Stuexen memset(&src, 0, sizeof(struct sockaddr_in6)); 310298132Stuexen src.sin6_family = AF_INET6; 311298132Stuexen src.sin6_len = sizeof(struct sockaddr_in6); 312298132Stuexen src.sin6_port = sh.src_port; 313298132Stuexen src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 314298132Stuexen if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 315298132Stuexen return; 316298132Stuexen } 317298132Stuexen memset(&dst, 0, sizeof(struct sockaddr_in6)); 318298132Stuexen dst.sin6_family = AF_INET6; 319298132Stuexen dst.sin6_len = sizeof(struct sockaddr_in6); 320298132Stuexen dst.sin6_port = sh.dest_port; 321298132Stuexen dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 322298132Stuexen if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 323298132Stuexen return; 324298132Stuexen } 325163953Srrs inp = NULL; 326163953Srrs net = NULL; 327298132Stuexen stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 328298132Stuexen (struct sockaddr *)&src, 329298132Stuexen &inp, &net, 1, SCTP_DEFAULT_VRFID); 330298132Stuexen if ((stcb != NULL) && 331298132Stuexen (net != NULL) && 332302138Stuexen (inp != NULL)) { 333298132Stuexen /* Check the verification tag */ 334298132Stuexen if (ntohl(sh.v_tag) != 0) { 335298132Stuexen /* 336298132Stuexen * This must be the verification tag used 337298132Stuexen * for sending out packets. We don't 338298132Stuexen * consider packets reflecting the 339298132Stuexen * verification tag. 340298132Stuexen */ 341298132Stuexen if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 342298132Stuexen SCTP_TCB_UNLOCK(stcb); 343298132Stuexen return; 344298132Stuexen } 345163953Srrs } else { 346298132Stuexen if (ip6cp->ip6c_m->m_pkthdr.len >= 347298132Stuexen ip6cp->ip6c_off + sizeof(struct sctphdr) + 348298132Stuexen sizeof(struct sctp_chunkhdr) + 349298132Stuexen offsetof(struct sctp_init, a_rwnd)) { 350298132Stuexen /* 351298132Stuexen * In this case we can check if we 352298132Stuexen * got an INIT chunk and if the 353298132Stuexen * initiate tag matches. 354298132Stuexen */ 355298132Stuexen uint32_t initiate_tag; 356298132Stuexen uint8_t chunk_type; 357298132Stuexen 358298132Stuexen m_copydata(ip6cp->ip6c_m, 359298132Stuexen ip6cp->ip6c_off + 360298132Stuexen sizeof(struct sctphdr), 361298132Stuexen sizeof(uint8_t), 362298132Stuexen (caddr_t)&chunk_type); 363298132Stuexen m_copydata(ip6cp->ip6c_m, 364298132Stuexen ip6cp->ip6c_off + 365298132Stuexen sizeof(struct sctphdr) + 366298132Stuexen sizeof(struct sctp_chunkhdr), 367298132Stuexen sizeof(uint32_t), 368298132Stuexen (caddr_t)&initiate_tag); 369298132Stuexen if ((chunk_type != SCTP_INITIATION) || 370298132Stuexen (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 371298132Stuexen SCTP_TCB_UNLOCK(stcb); 372298132Stuexen return; 373298132Stuexen } 374298132Stuexen } else { 375298132Stuexen SCTP_TCB_UNLOCK(stcb); 376298132Stuexen return; 377298132Stuexen } 378163953Srrs } 379298132Stuexen sctp6_notify(inp, stcb, net, 380298132Stuexen ip6cp->ip6c_icmp6->icmp6_type, 381298132Stuexen ip6cp->ip6c_icmp6->icmp6_code, 382319402Stuexen ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 383163953Srrs } else { 384298132Stuexen if ((stcb == NULL) && (inp != NULL)) { 385163953Srrs /* reduce inp's ref-count */ 386163953Srrs SCTP_INP_WLOCK(inp); 387163953Srrs SCTP_INP_DECR_REF(inp); 388163953Srrs SCTP_INP_WUNLOCK(inp); 389163953Srrs } 390298132Stuexen if (stcb) { 391163953Srrs SCTP_TCB_UNLOCK(stcb); 392298132Stuexen } 393163953Srrs } 394163953Srrs } 395163953Srrs} 396163953Srrs 397163953Srrs/* 398163953Srrs * this routine can probably be collasped into the one in sctp_userreq.c 399163953Srrs * since they do the same thing and now we lookup with a sockaddr 400163953Srrs */ 401163953Srrsstatic int 402163953Srrssctp6_getcred(SYSCTL_HANDLER_ARGS) 403163953Srrs{ 404164085Srrs struct xucred xuc; 405163953Srrs struct sockaddr_in6 addrs[2]; 406163953Srrs struct sctp_inpcb *inp; 407163953Srrs struct sctp_nets *net; 408163953Srrs struct sctp_tcb *stcb; 409164085Srrs int error; 410167598Srrs uint32_t vrf_id; 411163953Srrs 412167598Srrs vrf_id = SCTP_DEFAULT_VRFID; 413167598Srrs 414170587Srwatson error = priv_check(req->td, PRIV_NETINET_GETCRED); 415163953Srrs if (error) 416163953Srrs return (error); 417163953Srrs 418171943Srrs if (req->newlen != sizeof(addrs)) { 419171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 420163953Srrs return (EINVAL); 421171943Srrs } 422171943Srrs if (req->oldlen != sizeof(struct ucred)) { 423171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 424163953Srrs return (EINVAL); 425171943Srrs } 426163953Srrs error = SYSCTL_IN(req, addrs, sizeof(addrs)); 427163953Srrs if (error) 428163953Srrs return (error); 429163953Srrs 430237715Stuexen stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 431237715Stuexen sin6tosa(&addrs[0]), 432167598Srrs &inp, &net, 1, vrf_id); 433163953Srrs if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 434164085Srrs if ((inp != NULL) && (stcb == NULL)) { 435164085Srrs /* reduce ref-count */ 436163953Srrs SCTP_INP_WLOCK(inp); 437163953Srrs SCTP_INP_DECR_REF(inp); 438164085Srrs goto cred_can_cont; 439163953Srrs } 440171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 441164085Srrs error = ENOENT; 442163953Srrs goto out; 443163953Srrs } 444163953Srrs SCTP_TCB_UNLOCK(stcb); 445164085Srrs /* 446164085Srrs * We use the write lock here, only since in the error leg we need 447164085Srrs * it. If we used RLOCK, then we would have to 448164085Srrs * wlock/decr/unlock/rlock. Which in theory could create a hole. 449164085Srrs * Better to use higher wlock. 450164085Srrs */ 451164085Srrs SCTP_INP_WLOCK(inp); 452164085Srrscred_can_cont: 453164085Srrs error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 454164085Srrs if (error) { 455164085Srrs SCTP_INP_WUNLOCK(inp); 456164085Srrs goto out; 457164085Srrs } 458164085Srrs cru2x(inp->sctp_socket->so_cred, &xuc); 459164085Srrs SCTP_INP_WUNLOCK(inp); 460164085Srrs error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 461163953Srrsout: 462163953Srrs return (error); 463163953Srrs} 464163953Srrs 465163953SrrsSYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 466163953Srrs 0, 0, 467163953Srrs sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 468163953Srrs 469163953Srrs 470163953Srrs/* This is the same as the sctp_abort() could be made common */ 471163953Srrsstatic void 472163953Srrssctp6_abort(struct socket *so) 473163953Srrs{ 474163953Srrs struct sctp_inpcb *inp; 475163953Srrs uint32_t flags; 476163953Srrs 477163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 478233005Stuexen if (inp == NULL) { 479172091Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 480163953Srrs return; 481172091Srrs } 482163953Srrssctp_must_try_again: 483163953Srrs flags = inp->sctp_flags; 484163953Srrs#ifdef SCTP_LOG_CLOSING 485163953Srrs sctp_log_closing(inp, NULL, 17); 486163953Srrs#endif 487163953Srrs if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 488163953Srrs (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 489163953Srrs#ifdef SCTP_LOG_CLOSING 490163953Srrs sctp_log_closing(inp, NULL, 16); 491163953Srrs#endif 492169380Srrs sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 493169380Srrs SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 494163953Srrs SOCK_LOCK(so); 495167695Srrs SCTP_SB_CLEAR(so->so_snd); 496163953Srrs /* 497163953Srrs * same for the rcv ones, they are only here for the 498163953Srrs * accounting/select. 499163953Srrs */ 500167695Srrs SCTP_SB_CLEAR(so->so_rcv); 501167695Srrs /* Now null out the reference, we are completely detached. */ 502163953Srrs so->so_pcb = NULL; 503163953Srrs SOCK_UNLOCK(so); 504163953Srrs } else { 505163953Srrs flags = inp->sctp_flags; 506163953Srrs if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 507163953Srrs goto sctp_must_try_again; 508163953Srrs } 509163953Srrs } 510163953Srrs return; 511163953Srrs} 512163953Srrs 513163953Srrsstatic int 514228653Stuexensctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 515163953Srrs{ 516163953Srrs struct in6pcb *inp6; 517166086Srrs int error; 518163953Srrs struct sctp_inpcb *inp; 519170205Srrs uint32_t vrf_id = SCTP_DEFAULT_VRFID; 520163953Srrs 521163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 522171943Srrs if (inp != NULL) { 523171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 524228907Stuexen return (EINVAL); 525171943Srrs } 526163953Srrs if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 527179783Srrs error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 528163953Srrs if (error) 529228907Stuexen return (error); 530163953Srrs } 531170205Srrs error = sctp_inpcb_alloc(so, vrf_id); 532163953Srrs if (error) 533228907Stuexen return (error); 534163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 535170205Srrs SCTP_INP_WLOCK(inp); 536163953Srrs inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 537163953Srrs inp6 = (struct in6pcb *)inp; 538163953Srrs 539163953Srrs inp6->inp_vflag |= INP_IPV6; 540163953Srrs inp6->in6p_hops = -1; /* use kernel default */ 541163953Srrs inp6->in6p_cksum = -1; /* just to be sure */ 542163953Srrs#ifdef INET 543163953Srrs /* 544163953Srrs * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 545163953Srrs * socket as well, because the socket may be bound to an IPv6 546163953Srrs * wildcard address, which may match an IPv4-mapped IPv6 address. 547163953Srrs */ 548197288Srrs inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 549163953Srrs#endif 550170205Srrs SCTP_INP_WUNLOCK(inp); 551228907Stuexen return (0); 552163953Srrs} 553163953Srrs 554163953Srrsstatic int 555163953Srrssctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 556163953Srrs{ 557163953Srrs struct sctp_inpcb *inp; 558163953Srrs struct in6pcb *inp6; 559166086Srrs int error; 560163953Srrs 561163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 562233005Stuexen if (inp == NULL) { 563171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 564228907Stuexen return (EINVAL); 565171943Srrs } 566170056Srrs if (addr) { 567221249Stuexen switch (addr->sa_family) { 568221249Stuexen#ifdef INET 569221249Stuexen case AF_INET: 570221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 571221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 572228907Stuexen return (EINVAL); 573221249Stuexen } 574221249Stuexen break; 575221249Stuexen#endif 576221249Stuexen#ifdef INET6 577221249Stuexen case AF_INET6: 578221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 579221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 580228907Stuexen return (EINVAL); 581221249Stuexen } 582221249Stuexen break; 583221249Stuexen#endif 584221249Stuexen default: 585171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 586228907Stuexen return (EINVAL); 587170056Srrs } 588170056Srrs } 589163953Srrs inp6 = (struct in6pcb *)inp; 590163953Srrs inp6->inp_vflag &= ~INP_IPV4; 591163953Srrs inp6->inp_vflag |= INP_IPV6; 592166023Srrs if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 593221249Stuexen switch (addr->sa_family) { 594221249Stuexen#ifdef INET 595221249Stuexen case AF_INET: 596163953Srrs /* binding v4 addr to v6 socket, so reset flags */ 597163953Srrs inp6->inp_vflag |= INP_IPV4; 598163953Srrs inp6->inp_vflag &= ~INP_IPV6; 599221249Stuexen break; 600221249Stuexen#endif 601221249Stuexen#ifdef INET6 602221249Stuexen case AF_INET6: 603221249Stuexen { 604221249Stuexen struct sockaddr_in6 *sin6_p; 605163953Srrs 606221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 607163953Srrs 608221249Stuexen if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 609221249Stuexen inp6->inp_vflag |= INP_IPV4; 610221249Stuexen } 611221249Stuexen#ifdef INET 612221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 613221249Stuexen struct sockaddr_in sin; 614163953Srrs 615221249Stuexen in6_sin6_2_sin(&sin, sin6_p); 616221249Stuexen inp6->inp_vflag |= INP_IPV4; 617221249Stuexen inp6->inp_vflag &= ~INP_IPV6; 618221249Stuexen error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 619228907Stuexen return (error); 620221249Stuexen } 621221249Stuexen#endif 622221249Stuexen break; 623163953Srrs } 624221249Stuexen#endif 625221249Stuexen default: 626221249Stuexen break; 627163953Srrs } 628163953Srrs } else if (addr != NULL) { 629221249Stuexen struct sockaddr_in6 *sin6_p; 630221249Stuexen 631163953Srrs /* IPV6_V6ONLY socket */ 632221249Stuexen#ifdef INET 633163953Srrs if (addr->sa_family == AF_INET) { 634163953Srrs /* can't bind v4 addr to v6 only socket! */ 635171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 636228907Stuexen return (EINVAL); 637221249Stuexen } 638221249Stuexen#endif 639221249Stuexen sin6_p = (struct sockaddr_in6 *)addr; 640163953Srrs 641221249Stuexen if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 642221249Stuexen /* can't bind v4-mapped addrs either! */ 643221249Stuexen /* NOTE: we don't support SIIT */ 644221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 645228907Stuexen return (EINVAL); 646163953Srrs } 647163953Srrs } 648171572Srrs error = sctp_inpcb_bind(so, addr, NULL, p); 649228907Stuexen return (error); 650163953Srrs} 651163953Srrs 652163953Srrs 653163953Srrsstatic void 654163953Srrssctp6_close(struct socket *so) 655163953Srrs{ 656171990Srrs sctp_close(so); 657163953Srrs} 658163953Srrs 659167598Srrs/* This could be made common with sctp_detach() since they are identical */ 660163953Srrs 661168709Srrsstatic 662168709Srrsint 663163953Srrssctp6_disconnect(struct socket *so) 664163953Srrs{ 665171990Srrs return (sctp_disconnect(so)); 666163953Srrs} 667163953Srrs 668168709Srrs 669163953Srrsint 670163953Srrssctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 671163953Srrs struct mbuf *control, struct thread *p); 672163953Srrs 673163953Srrs 674163953Srrsstatic int 675163953Srrssctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 676163953Srrs struct mbuf *control, struct thread *p) 677163953Srrs{ 678163953Srrs struct sctp_inpcb *inp; 679163953Srrs struct in6pcb *inp6; 680163953Srrs 681163953Srrs#ifdef INET 682163953Srrs struct sockaddr_in6 *sin6; 683163953Srrs#endif /* INET */ 684163953Srrs /* No SPL needed since sctp_output does this */ 685163953Srrs 686163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 687163953Srrs if (inp == NULL) { 688163953Srrs if (control) { 689169352Srrs SCTP_RELEASE_PKT(control); 690163953Srrs control = NULL; 691163953Srrs } 692169352Srrs SCTP_RELEASE_PKT(m); 693171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 694228907Stuexen return (EINVAL); 695163953Srrs } 696163953Srrs inp6 = (struct in6pcb *)inp; 697163953Srrs /* 698163953Srrs * For the TCP model we may get a NULL addr, if we are a connected 699163953Srrs * socket thats ok. 700163953Srrs */ 701163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 702163953Srrs (addr == NULL)) { 703163953Srrs goto connected_type; 704163953Srrs } 705163953Srrs if (addr == NULL) { 706169352Srrs SCTP_RELEASE_PKT(m); 707163953Srrs if (control) { 708169352Srrs SCTP_RELEASE_PKT(control); 709163953Srrs control = NULL; 710163953Srrs } 711171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 712163953Srrs return (EDESTADDRREQ); 713163953Srrs } 714163953Srrs#ifdef INET 715163953Srrs sin6 = (struct sockaddr_in6 *)addr; 716166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 717163953Srrs /* 718163953Srrs * if IPV6_V6ONLY flag, we discard datagrams destined to a 719163953Srrs * v4 addr or v4-mapped addr 720163953Srrs */ 721163953Srrs if (addr->sa_family == AF_INET) { 722171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 723228907Stuexen return (EINVAL); 724163953Srrs } 725163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 726171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 727228907Stuexen return (EINVAL); 728163953Srrs } 729163953Srrs } 730163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 731250466Stuexen struct sockaddr_in sin; 732163953Srrs 733250466Stuexen /* convert v4-mapped into v4 addr and send */ 734250466Stuexen in6_sin6_2_sin(&sin, sin6); 735250466Stuexen return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 736163953Srrs } 737163953Srrs#endif /* INET */ 738163953Srrsconnected_type: 739163953Srrs /* now what about control */ 740163953Srrs if (control) { 741163953Srrs if (inp->control) { 742169420Srrs SCTP_PRINTF("huh? control set?\n"); 743169352Srrs SCTP_RELEASE_PKT(inp->control); 744163953Srrs inp->control = NULL; 745163953Srrs } 746163953Srrs inp->control = control; 747163953Srrs } 748163953Srrs /* Place the data */ 749163953Srrs if (inp->pkt) { 750165647Srrs SCTP_BUF_NEXT(inp->pkt_last) = m; 751163953Srrs inp->pkt_last = m; 752163953Srrs } else { 753163953Srrs inp->pkt_last = inp->pkt = m; 754163953Srrs } 755163953Srrs if ( 756163953Srrs /* FreeBSD and MacOSX uses a flag passed */ 757163953Srrs ((flags & PRUS_MORETOCOME) == 0) 758163953Srrs ) { 759163953Srrs /* 760163953Srrs * note with the current version this code will only be used 761163953Srrs * by OpenBSD, NetBSD and FreeBSD have methods for 762163953Srrs * re-defining sosend() to use sctp_sosend(). One can 763163953Srrs * optionaly switch back to this code (by changing back the 764163953Srrs * defininitions but this is not advisable. 765163953Srrs */ 766163953Srrs int ret; 767163953Srrs 768163953Srrs ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 769163953Srrs inp->pkt = NULL; 770163953Srrs inp->control = NULL; 771163953Srrs return (ret); 772163953Srrs } else { 773163953Srrs return (0); 774163953Srrs } 775163953Srrs} 776163953Srrs 777163953Srrsstatic int 778163953Srrssctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 779163953Srrs{ 780167598Srrs uint32_t vrf_id; 781163953Srrs int error = 0; 782163953Srrs struct sctp_inpcb *inp; 783163953Srrs struct sctp_tcb *stcb; 784163953Srrs#ifdef INET 785257555Stuexen struct in6pcb *inp6; 786163953Srrs struct sockaddr_in6 *sin6; 787271221Stuexen union sctp_sockstore store; 788221249Stuexen#endif 789163953Srrs 790257555Stuexen#ifdef INET 791163953Srrs inp6 = (struct in6pcb *)so->so_pcb; 792257555Stuexen#endif 793163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 794233005Stuexen if (inp == NULL) { 795171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 796163953Srrs return (ECONNRESET); /* I made the same as TCP since we are 797163953Srrs * not setup? */ 798163953Srrs } 799170056Srrs if (addr == NULL) { 800171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 801170056Srrs return (EINVAL); 802170056Srrs } 803221249Stuexen switch (addr->sa_family) { 804221249Stuexen#ifdef INET 805221249Stuexen case AF_INET: 806221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in)) { 807221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 808221249Stuexen return (EINVAL); 809221249Stuexen } 810221249Stuexen break; 811221249Stuexen#endif 812221249Stuexen#ifdef INET6 813221249Stuexen case AF_INET6: 814221249Stuexen if (addr->sa_len != sizeof(struct sockaddr_in6)) { 815221249Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 816221249Stuexen return (EINVAL); 817221249Stuexen } 818221249Stuexen break; 819221249Stuexen#endif 820221249Stuexen default: 821171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 822170056Srrs return (EINVAL); 823170056Srrs } 824221249Stuexen 825168299Srrs vrf_id = inp->def_vrf_id; 826163953Srrs SCTP_ASOC_CREATE_LOCK(inp); 827163953Srrs SCTP_INP_RLOCK(inp); 828163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 829163953Srrs SCTP_PCB_FLAGS_UNBOUND) { 830163953Srrs /* Bind a ephemeral port */ 831163953Srrs SCTP_INP_RUNLOCK(inp); 832163953Srrs error = sctp6_bind(so, NULL, p); 833163953Srrs if (error) { 834163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 835163953Srrs 836163953Srrs return (error); 837163953Srrs } 838163953Srrs SCTP_INP_RLOCK(inp); 839163953Srrs } 840163953Srrs if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 841163953Srrs (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 842163953Srrs /* We are already connected AND the TCP model */ 843163953Srrs SCTP_INP_RUNLOCK(inp); 844163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 845171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 846163953Srrs return (EADDRINUSE); 847163953Srrs } 848163953Srrs#ifdef INET 849163953Srrs sin6 = (struct sockaddr_in6 *)addr; 850166023Srrs if (SCTP_IPV6_V6ONLY(inp6)) { 851163953Srrs /* 852163953Srrs * if IPV6_V6ONLY flag, ignore connections destined to a v4 853163953Srrs * addr or v4-mapped addr 854163953Srrs */ 855163953Srrs if (addr->sa_family == AF_INET) { 856163953Srrs SCTP_INP_RUNLOCK(inp); 857163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 858171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 859228907Stuexen return (EINVAL); 860163953Srrs } 861163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 862163953Srrs SCTP_INP_RUNLOCK(inp); 863163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 864171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 865228907Stuexen return (EINVAL); 866163953Srrs } 867163953Srrs } 868163953Srrs if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 869250466Stuexen /* convert v4-mapped into v4 addr */ 870271221Stuexen in6_sin6_2_sin(&store.sin, sin6); 871271221Stuexen addr = &store.sa; 872221411Stuexen } 873163953Srrs#endif /* INET */ 874163953Srrs /* Now do we connect? */ 875163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 876163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 877169420Srrs if (stcb) { 878332186Stuexen SCTP_TCB_LOCK(stcb); 879169420Srrs } 880163953Srrs SCTP_INP_RUNLOCK(inp); 881163953Srrs } else { 882163953Srrs SCTP_INP_RUNLOCK(inp); 883163953Srrs SCTP_INP_WLOCK(inp); 884163953Srrs SCTP_INP_INCR_REF(inp); 885163953Srrs SCTP_INP_WUNLOCK(inp); 886163953Srrs stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 887163953Srrs if (stcb == NULL) { 888163953Srrs SCTP_INP_WLOCK(inp); 889163953Srrs SCTP_INP_DECR_REF(inp); 890163953Srrs SCTP_INP_WUNLOCK(inp); 891163953Srrs } 892163953Srrs } 893163953Srrs 894163953Srrs if (stcb != NULL) { 895163953Srrs /* Already have or am bring up an association */ 896163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 897163953Srrs SCTP_TCB_UNLOCK(stcb); 898171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 899163953Srrs return (EALREADY); 900163953Srrs } 901163953Srrs /* We are GOOD to go */ 902298902Stuexen stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 903298902Stuexen inp->sctp_ep.pre_open_stream_count, 904298902Stuexen inp->sctp_ep.port, p); 905163953Srrs SCTP_ASOC_CREATE_UNLOCK(inp); 906163953Srrs if (stcb == NULL) { 907163953Srrs /* Gak! no memory */ 908163953Srrs return (error); 909163953Srrs } 910163953Srrs if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 911163953Srrs stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 912163953Srrs /* Set the connected flag so we can queue data */ 913163953Srrs soisconnecting(so); 914163953Srrs } 915163953Srrs stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 916169420Srrs (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 917163953Srrs 918163953Srrs /* initialize authentication parameters for the assoc */ 919163953Srrs sctp_initialize_auth_params(inp, stcb); 920163953Srrs 921172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 922163953Srrs SCTP_TCB_UNLOCK(stcb); 923228907Stuexen return (error); 924163953Srrs} 925163953Srrs 926163953Srrsstatic int 927163953Srrssctp6_getaddr(struct socket *so, struct sockaddr **addr) 928163953Srrs{ 929163953Srrs struct sockaddr_in6 *sin6; 930163953Srrs struct sctp_inpcb *inp; 931167598Srrs uint32_t vrf_id; 932167598Srrs struct sctp_ifa *sctp_ifa; 933163953Srrs 934163953Srrs int error; 935163953Srrs 936163953Srrs /* 937163953Srrs * Do the malloc first in case it blocks. 938163953Srrs */ 939221249Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 940211944Stuexen if (sin6 == NULL) 941228907Stuexen return (ENOMEM); 942163953Srrs sin6->sin6_family = AF_INET6; 943163953Srrs sin6->sin6_len = sizeof(*sin6); 944163953Srrs 945163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 946163953Srrs if (inp == NULL) { 947163953Srrs SCTP_FREE_SONAME(sin6); 948171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 949228907Stuexen return (ECONNRESET); 950163953Srrs } 951163953Srrs SCTP_INP_RLOCK(inp); 952163953Srrs sin6->sin6_port = inp->sctp_lport; 953163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 954163953Srrs /* For the bound all case you get back 0 */ 955163953Srrs if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 956163953Srrs struct sctp_tcb *stcb; 957163953Srrs struct sockaddr_in6 *sin_a6; 958163953Srrs struct sctp_nets *net; 959163953Srrs int fnd; 960163953Srrs 961163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 962163953Srrs if (stcb == NULL) { 963295771Stuexen SCTP_INP_RUNLOCK(inp); 964295929Stuexen SCTP_FREE_SONAME(sin6); 965295771Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 966295771Stuexen return (ENOENT); 967163953Srrs } 968163953Srrs fnd = 0; 969163953Srrs sin_a6 = NULL; 970163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 971163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 972164085Srrs if (sin_a6 == NULL) 973164085Srrs /* this will make coverity happy */ 974164085Srrs continue; 975164085Srrs 976163953Srrs if (sin_a6->sin6_family == AF_INET6) { 977163953Srrs fnd = 1; 978163953Srrs break; 979163953Srrs } 980163953Srrs } 981163953Srrs if ((!fnd) || (sin_a6 == NULL)) { 982163953Srrs /* punt */ 983295771Stuexen SCTP_INP_RUNLOCK(inp); 984295929Stuexen SCTP_FREE_SONAME(sin6); 985295771Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 986295771Stuexen return (ENOENT); 987163953Srrs } 988168299Srrs vrf_id = inp->def_vrf_id; 989310773Stuexen sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 990167598Srrs if (sctp_ifa) { 991167598Srrs sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 992167598Srrs } 993163953Srrs } else { 994163953Srrs /* For the bound all case you get back 0 */ 995163953Srrs memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 996163953Srrs } 997163953Srrs } else { 998163953Srrs /* Take the first IPv6 address in the list */ 999163953Srrs struct sctp_laddr *laddr; 1000163953Srrs int fnd = 0; 1001163953Srrs 1002163953Srrs LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1003167598Srrs if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1004163953Srrs struct sockaddr_in6 *sin_a; 1005163953Srrs 1006271221Stuexen sin_a = &laddr->ifa->address.sin6; 1007163953Srrs sin6->sin6_addr = sin_a->sin6_addr; 1008163953Srrs fnd = 1; 1009163953Srrs break; 1010163953Srrs } 1011163953Srrs } 1012163953Srrs if (!fnd) { 1013163953Srrs SCTP_FREE_SONAME(sin6); 1014163953Srrs SCTP_INP_RUNLOCK(inp); 1015171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1016228907Stuexen return (ENOENT); 1017163953Srrs } 1018163953Srrs } 1019163953Srrs SCTP_INP_RUNLOCK(inp); 1020163953Srrs /* Scoping things for v6 */ 1021164085Srrs if ((error = sa6_recoverscope(sin6)) != 0) { 1022164085Srrs SCTP_FREE_SONAME(sin6); 1023163953Srrs return (error); 1024164085Srrs } 1025163953Srrs (*addr) = (struct sockaddr *)sin6; 1026163953Srrs return (0); 1027163953Srrs} 1028163953Srrs 1029163953Srrsstatic int 1030163953Srrssctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1031163953Srrs{ 1032231895Stuexen struct sockaddr_in6 *sin6; 1033163953Srrs int fnd; 1034163953Srrs struct sockaddr_in6 *sin_a6; 1035163953Srrs struct sctp_inpcb *inp; 1036163953Srrs struct sctp_tcb *stcb; 1037163953Srrs struct sctp_nets *net; 1038163953Srrs int error; 1039163953Srrs 1040228907Stuexen /* Do the malloc first in case it blocks. */ 1041163953Srrs SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1042211944Stuexen if (sin6 == NULL) 1043211944Stuexen return (ENOMEM); 1044163953Srrs sin6->sin6_family = AF_INET6; 1045163953Srrs sin6->sin6_len = sizeof(*sin6); 1046163953Srrs 1047163953Srrs inp = (struct sctp_inpcb *)so->so_pcb; 1048228907Stuexen if ((inp == NULL) || 1049228907Stuexen ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1050228907Stuexen /* UDP type and listeners will drop out here */ 1051163953Srrs SCTP_FREE_SONAME(sin6); 1052228907Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1053228907Stuexen return (ENOTCONN); 1054163953Srrs } 1055163953Srrs SCTP_INP_RLOCK(inp); 1056163953Srrs stcb = LIST_FIRST(&inp->sctp_asoc_list); 1057169420Srrs if (stcb) { 1058163953Srrs SCTP_TCB_LOCK(stcb); 1059169420Srrs } 1060163953Srrs SCTP_INP_RUNLOCK(inp); 1061163953Srrs if (stcb == NULL) { 1062163953Srrs SCTP_FREE_SONAME(sin6); 1063171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1064228907Stuexen return (ECONNRESET); 1065163953Srrs } 1066163953Srrs fnd = 0; 1067163953Srrs TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1068163953Srrs sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1069163953Srrs if (sin_a6->sin6_family == AF_INET6) { 1070163953Srrs fnd = 1; 1071163953Srrs sin6->sin6_port = stcb->rport; 1072163953Srrs sin6->sin6_addr = sin_a6->sin6_addr; 1073163953Srrs break; 1074163953Srrs } 1075163953Srrs } 1076163953Srrs SCTP_TCB_UNLOCK(stcb); 1077163953Srrs if (!fnd) { 1078163953Srrs /* No IPv4 address */ 1079163953Srrs SCTP_FREE_SONAME(sin6); 1080171943Srrs SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1081228907Stuexen return (ENOENT); 1082163953Srrs } 1083275868Stuexen if ((error = sa6_recoverscope(sin6)) != 0) { 1084275868Stuexen SCTP_FREE_SONAME(sin6); 1085275868Stuexen SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1086163953Srrs return (error); 1087275868Stuexen } 1088163953Srrs *addr = (struct sockaddr *)sin6; 1089163953Srrs return (0); 1090163953Srrs} 1091163953Srrs 1092163953Srrsstatic int 1093163953Srrssctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1094163953Srrs{ 1095163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1096166086Srrs int error; 1097163953Srrs 1098171943Srrs if (inp6 == NULL) { 1099171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1100228907Stuexen return (EINVAL); 1101171943Srrs } 1102163953Srrs /* allow v6 addresses precedence */ 1103163953Srrs error = sctp6_getaddr(so, nam); 1104221249Stuexen#ifdef INET 1105163953Srrs if (error) { 1106295771Stuexen struct sockaddr_in6 *sin6; 1107295771Stuexen 1108163953Srrs /* try v4 next if v6 failed */ 1109163953Srrs error = sctp_ingetaddr(so, nam); 1110163953Srrs if (error) { 1111163953Srrs return (error); 1112163953Srrs } 1113295771Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1114295771Stuexen if (sin6 == NULL) { 1115295771Stuexen SCTP_FREE_SONAME(*nam); 1116295771Stuexen return (ENOMEM); 1117163953Srrs } 1118295771Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1119295771Stuexen SCTP_FREE_SONAME(*nam); 1120295771Stuexen *nam = (struct sockaddr *)sin6; 1121163953Srrs } 1122221249Stuexen#endif 1123163953Srrs return (error); 1124163953Srrs} 1125163953Srrs 1126163953Srrs 1127163953Srrsstatic int 1128163953Srrssctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1129163953Srrs{ 1130163953Srrs struct in6pcb *inp6 = sotoin6pcb(so); 1131166086Srrs int error; 1132163953Srrs 1133171943Srrs if (inp6 == NULL) { 1134171943Srrs SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1135228907Stuexen return (EINVAL); 1136171943Srrs } 1137163953Srrs /* allow v6 addresses precedence */ 1138163953Srrs error = sctp6_peeraddr(so, nam); 1139221249Stuexen#ifdef INET 1140163953Srrs if (error) { 1141295771Stuexen struct sockaddr_in6 *sin6; 1142295771Stuexen 1143163953Srrs /* try v4 next if v6 failed */ 1144163953Srrs error = sctp_peeraddr(so, nam); 1145163953Srrs if (error) { 1146163953Srrs return (error); 1147163953Srrs } 1148295771Stuexen SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1149295771Stuexen if (sin6 == NULL) { 1150295771Stuexen SCTP_FREE_SONAME(*nam); 1151295771Stuexen return (ENOMEM); 1152163953Srrs } 1153295771Stuexen in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1154295771Stuexen SCTP_FREE_SONAME(*nam); 1155295771Stuexen *nam = (struct sockaddr *)sin6; 1156163953Srrs } 1157221249Stuexen#endif 1158228907Stuexen return (error); 1159163953Srrs} 1160163953Srrs 1161163953Srrsstruct pr_usrreqs sctp6_usrreqs = { 1162163953Srrs .pru_abort = sctp6_abort, 1163163953Srrs .pru_accept = sctp_accept, 1164163953Srrs .pru_attach = sctp6_attach, 1165163953Srrs .pru_bind = sctp6_bind, 1166163953Srrs .pru_connect = sctp6_connect, 1167163953Srrs .pru_control = in6_control, 1168163953Srrs .pru_close = sctp6_close, 1169163953Srrs .pru_detach = sctp6_close, 1170163953Srrs .pru_sopoll = sopoll_generic, 1171178201Srrs .pru_flush = sctp_flush, 1172163953Srrs .pru_disconnect = sctp6_disconnect, 1173163953Srrs .pru_listen = sctp_listen, 1174163953Srrs .pru_peeraddr = sctp6_getpeeraddr, 1175163953Srrs .pru_send = sctp6_send, 1176163953Srrs .pru_shutdown = sctp_shutdown, 1177163953Srrs .pru_sockaddr = sctp6_in6getaddr, 1178163953Srrs .pru_sosend = sctp_sosend, 1179163953Srrs .pru_soreceive = sctp_soreceive 1180163953Srrs}; 1181238501Stuexen 1182238501Stuexen#endif 1183