raw_ip6.c revision 148250
1/*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/netinet6/raw_ip6.c 148250 2005-07-21 16:39:23Z ume $ 30 */ 31 32/*- 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 61 */ 62 63#include "opt_ipsec.h" 64#include "opt_inet6.h" 65 66#include <sys/param.h> 67#include <sys/errno.h> 68#include <sys/lock.h> 69#include <sys/malloc.h> 70#include <sys/mbuf.h> 71#include <sys/proc.h> 72#include <sys/protosw.h> 73#include <sys/signalvar.h> 74#include <sys/socket.h> 75#include <sys/socketvar.h> 76#include <sys/sx.h> 77#include <sys/systm.h> 78 79#include <net/if.h> 80#include <net/if_types.h> 81#include <net/route.h> 82 83#include <netinet/in.h> 84#include <netinet/in_var.h> 85#include <netinet/in_systm.h> 86#include <netinet/icmp6.h> 87#include <netinet/in_pcb.h> 88#include <netinet/ip6.h> 89#include <netinet6/ip6protosw.h> 90#include <netinet6/ip6_mroute.h> 91#include <netinet6/in6_pcb.h> 92#include <netinet6/ip6_var.h> 93#include <netinet6/nd6.h> 94#include <netinet6/raw_ip6.h> 95#ifdef ENABLE_DEFAULT_SCOPE 96#include <netinet6/scope6_var.h> 97#endif 98 99#ifdef IPSEC 100#include <netinet6/ipsec.h> 101#include <netinet6/ipsec6.h> 102#endif /*IPSEC*/ 103 104#ifdef FAST_IPSEC 105#include <netipsec/ipsec.h> 106#include <netipsec/ipsec6.h> 107#endif /* FAST_IPSEC */ 108 109#include <machine/stdarg.h> 110 111#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 112#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 113 114/* 115 * Raw interface to IP6 protocol. 116 */ 117 118extern struct inpcbhead ripcb; 119extern struct inpcbinfo ripcbinfo; 120extern u_long rip_sendspace; 121extern u_long rip_recvspace; 122 123struct rip6stat rip6stat; 124 125/* 126 * Setup generic address and protocol structures 127 * for raw_input routine, then pass them along with 128 * mbuf chain. 129 */ 130int 131rip6_input(mp, offp, proto) 132 struct mbuf **mp; 133 int *offp, proto; 134{ 135 struct mbuf *m = *mp; 136 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 137 register struct inpcb *in6p; 138 struct inpcb *last = 0; 139 struct mbuf *opts = NULL; 140 struct sockaddr_in6 fromsa; 141 142 rip6stat.rip6s_ipackets++; 143 144 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 145 /* XXX send icmp6 host/port unreach? */ 146 m_freem(m); 147 return IPPROTO_DONE; 148 } 149 150 init_sin6(&fromsa, m); /* general init */ 151 152 INP_INFO_RLOCK(&ripcbinfo); 153 LIST_FOREACH(in6p, &ripcb, inp_list) { 154 INP_LOCK(in6p); 155 if ((in6p->in6p_vflag & INP_IPV6) == 0) { 156docontinue: 157 INP_UNLOCK(in6p); 158 continue; 159 } 160 if (in6p->in6p_ip6_nxt && 161 in6p->in6p_ip6_nxt != proto) 162 goto docontinue; 163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 165 goto docontinue; 166 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 167 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 168 goto docontinue; 169 if (in6p->in6p_cksum != -1) { 170 rip6stat.rip6s_isum++; 171 if (in6_cksum(m, ip6->ip6_nxt, *offp, 172 m->m_pkthdr.len - *offp)) { 173 rip6stat.rip6s_badsum++; 174 goto docontinue; 175 } 176 } 177 if (last) { 178 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 179 180#if defined(IPSEC) || defined(FAST_IPSEC) 181 /* 182 * Check AH/ESP integrity. 183 */ 184 if (n && ipsec6_in_reject(n, last)) { 185 m_freem(n); 186#ifdef IPSEC 187 ipsec6stat.in_polvio++; 188#endif /*IPSEC*/ 189 /* do not inject data into pcb */ 190 } else 191#endif /*IPSEC || FAST_IPSEC*/ 192 if (n) { 193 if (last->in6p_flags & IN6P_CONTROLOPTS || 194 last->in6p_socket->so_options & SO_TIMESTAMP) 195 ip6_savecontrol(last, n, &opts); 196 /* strip intermediate headers */ 197 m_adj(n, *offp); 198 if (sbappendaddr(&last->in6p_socket->so_rcv, 199 (struct sockaddr *)&fromsa, 200 n, opts) == 0) { 201 m_freem(n); 202 if (opts) 203 m_freem(opts); 204 rip6stat.rip6s_fullsock++; 205 } else 206 sorwakeup(last->in6p_socket); 207 opts = NULL; 208 } 209 INP_UNLOCK(last); 210 } 211 last = in6p; 212 } 213#if defined(IPSEC) || defined(FAST_IPSEC) 214 /* 215 * Check AH/ESP integrity. 216 */ 217 if (last && ipsec6_in_reject(m, last)) { 218 m_freem(m); 219#ifdef IPSEC 220 ipsec6stat.in_polvio++; 221#endif /*IPSEC*/ 222 ip6stat.ip6s_delivered--; 223 /* do not inject data into pcb */ 224 } else 225#endif /*IPSEC || FAST_IPSEC*/ 226 if (last) { 227 if (last->in6p_flags & IN6P_CONTROLOPTS || 228 last->in6p_socket->so_options & SO_TIMESTAMP) 229 ip6_savecontrol(last, m, &opts); 230 /* strip intermediate headers */ 231 m_adj(m, *offp); 232 if (sbappendaddr(&last->in6p_socket->so_rcv, 233 (struct sockaddr *)&fromsa, m, opts) == 0) { 234 m_freem(m); 235 if (opts) 236 m_freem(opts); 237 rip6stat.rip6s_fullsock++; 238 } else 239 sorwakeup(last->in6p_socket); 240 INP_UNLOCK(last); 241 } else { 242 rip6stat.rip6s_nosock++; 243 if (m->m_flags & M_MCAST) 244 rip6stat.rip6s_nosockmcast++; 245 if (proto == IPPROTO_NONE) 246 m_freem(m); 247 else { 248 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 249 icmp6_error(m, ICMP6_PARAM_PROB, 250 ICMP6_PARAMPROB_NEXTHEADER, 251 prvnxtp - mtod(m, char *)); 252 } 253 ip6stat.ip6s_delivered--; 254 } 255 INP_INFO_RUNLOCK(&ripcbinfo); 256 return IPPROTO_DONE; 257} 258 259void 260rip6_ctlinput(cmd, sa, d) 261 int cmd; 262 struct sockaddr *sa; 263 void *d; 264{ 265 struct ip6_hdr *ip6; 266 struct mbuf *m; 267 int off = 0; 268 struct ip6ctlparam *ip6cp = NULL; 269 const struct sockaddr_in6 *sa6_src = NULL; 270 void *cmdarg; 271 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 272 273 if (sa->sa_family != AF_INET6 || 274 sa->sa_len != sizeof(struct sockaddr_in6)) 275 return; 276 277 if ((unsigned)cmd >= PRC_NCMDS) 278 return; 279 if (PRC_IS_REDIRECT(cmd)) 280 notify = in6_rtchange, d = NULL; 281 else if (cmd == PRC_HOSTDEAD) 282 d = NULL; 283 else if (inet6ctlerrmap[cmd] == 0) 284 return; 285 286 /* if the parameter is from icmp6, decode it. */ 287 if (d != NULL) { 288 ip6cp = (struct ip6ctlparam *)d; 289 m = ip6cp->ip6c_m; 290 ip6 = ip6cp->ip6c_ip6; 291 off = ip6cp->ip6c_off; 292 cmdarg = ip6cp->ip6c_cmdarg; 293 sa6_src = ip6cp->ip6c_src; 294 } else { 295 m = NULL; 296 ip6 = NULL; 297 cmdarg = NULL; 298 sa6_src = &sa6_any; 299 } 300 301 (void) in6_pcbnotify(&ripcbinfo, sa, 0, 302 (const struct sockaddr *)sa6_src, 303 0, cmd, cmdarg, notify); 304} 305 306/* 307 * Generate IPv6 header and pass packet to ip6_output. 308 * Tack on options user may have setup with control call. 309 */ 310int 311#if __STDC__ 312rip6_output(struct mbuf *m, ...) 313#else 314rip6_output(m, va_alist) 315 struct mbuf *m; 316 va_dcl 317#endif 318{ 319 struct mbuf *control; 320 struct socket *so; 321 struct sockaddr_in6 *dstsock; 322 struct in6_addr *dst; 323 struct ip6_hdr *ip6; 324 struct inpcb *in6p; 325 u_int plen = m->m_pkthdr.len; 326 int error = 0; 327 struct ip6_pktopts opt, *optp; 328 struct ifnet *oifp = NULL; 329 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 330 int priv = 0; 331 struct in6_addr *in6a; 332 va_list ap; 333 334 va_start(ap, m); 335 so = va_arg(ap, struct socket *); 336 dstsock = va_arg(ap, struct sockaddr_in6 *); 337 control = va_arg(ap, struct mbuf *); 338 va_end(ap); 339 340 in6p = sotoin6pcb(so); 341 INP_LOCK(in6p); 342 343 priv = 0; 344 if (so->so_cred->cr_uid == 0) 345 priv = 1; 346 dst = &dstsock->sin6_addr; 347 if (control) { 348 if ((error = ip6_setpktopts(control, &opt, 349 in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 350 != 0) { 351 goto bad; 352 } 353 optp = &opt; 354 } else 355 optp = in6p->in6p_outputopts; 356 357 /* 358 * For an ICMPv6 packet, we should know its type and code 359 * to update statistics. 360 */ 361 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 362 struct icmp6_hdr *icmp6; 363 if (m->m_len < sizeof(struct icmp6_hdr) && 364 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 365 error = ENOBUFS; 366 goto bad; 367 } 368 icmp6 = mtod(m, struct icmp6_hdr *); 369 type = icmp6->icmp6_type; 370 code = icmp6->icmp6_code; 371 } 372 373 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 374 if (m == NULL) { 375 error = ENOBUFS; 376 goto bad; 377 } 378 ip6 = mtod(m, struct ip6_hdr *); 379 380 /* 381 * Next header might not be ICMP6 but use its pseudo header anyway. 382 */ 383 ip6->ip6_dst = *dst; 384 385 /* 386 * If the scope of the destination is link-local, embed the interface 387 * index in the address. 388 * 389 * XXX advanced-api value overrides sin6_scope_id 390 */ 391 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 392 struct in6_pktinfo *pi; 393 394 /* 395 * XXX Boundary check is assumed to be already done in 396 * ip6_setpktopts(). 397 */ 398 if (optp && 399 (pi = optp->ip6po_pktinfo) && 400 pi->ipi6_ifindex) { 401 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 402 oifp = ifnet_byindex(pi->ipi6_ifindex); 403 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 404 in6p->in6p_moptions && 405 in6p->in6p_moptions->im6o_multicast_ifp) { 406 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 407 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 408 } else if (dstsock->sin6_scope_id) { 409 /* boundary check */ 410 if (dstsock->sin6_scope_id < 0 || 411 if_index < dstsock->sin6_scope_id) { 412 error = ENXIO; /* XXX EINVAL? */ 413 goto bad; 414 } 415 ip6->ip6_dst.s6_addr16[1] = 416 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */ 417 } 418 } 419 420 /* 421 * Source address selection. 422 */ 423 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 424 &in6p->in6p_laddr, &error)) == 0) { 425 if (error == 0) 426 error = EADDRNOTAVAIL; 427 goto bad; 428 } 429 ip6->ip6_src = *in6a; 430 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 431 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 432 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 433 (IPV6_VERSION & IPV6_VERSION_MASK); 434 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 435 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 436 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 437 438 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 439 in6p->in6p_cksum != -1) { 440 struct mbuf *n; 441 int off; 442 u_int16_t *p; 443 444 /* compute checksum */ 445 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 446 off = offsetof(struct icmp6_hdr, icmp6_cksum); 447 else 448 off = in6p->in6p_cksum; 449 if (plen < off + 1) { 450 error = EINVAL; 451 goto bad; 452 } 453 off += sizeof(struct ip6_hdr); 454 455 n = m; 456 while (n && n->m_len <= off) { 457 off -= n->m_len; 458 n = n->m_next; 459 } 460 if (!n) 461 goto bad; 462 p = (u_int16_t *)(mtod(n, caddr_t) + off); 463 *p = 0; 464 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 465 } 466 467 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 468 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 469 if (oifp) 470 icmp6_ifoutstat_inc(oifp, type, code); 471 icmp6stat.icp6s_outhist[type]++; 472 } else 473 rip6stat.rip6s_opackets++; 474 475 goto freectl; 476 477 bad: 478 if (m) 479 m_freem(m); 480 481 freectl: 482 if (control) { 483 ip6_clearpktopts(&opt, -1); 484 m_freem(control); 485 } 486 INP_UNLOCK(in6p); 487 return (error); 488} 489 490/* 491 * Raw IPv6 socket option processing. 492 */ 493int 494rip6_ctloutput(so, sopt) 495 struct socket *so; 496 struct sockopt *sopt; 497{ 498 int error; 499 500 if (sopt->sopt_level == IPPROTO_ICMPV6) 501 /* 502 * XXX: is it better to call icmp6_ctloutput() directly 503 * from protosw? 504 */ 505 return (icmp6_ctloutput(so, sopt)); 506 else if (sopt->sopt_level != IPPROTO_IPV6) 507 return (EINVAL); 508 509 error = 0; 510 511 switch (sopt->sopt_dir) { 512 case SOPT_GET: 513 switch (sopt->sopt_name) { 514 case MRT6_INIT: 515 case MRT6_DONE: 516 case MRT6_ADD_MIF: 517 case MRT6_DEL_MIF: 518 case MRT6_ADD_MFC: 519 case MRT6_DEL_MFC: 520 case MRT6_PIM: 521 error = ip6_mrouter_get(so, sopt); 522 break; 523 case IPV6_CHECKSUM: 524 error = ip6_raw_ctloutput(so, sopt); 525 break; 526 default: 527 error = ip6_ctloutput(so, sopt); 528 break; 529 } 530 break; 531 532 case SOPT_SET: 533 switch (sopt->sopt_name) { 534 case MRT6_INIT: 535 case MRT6_DONE: 536 case MRT6_ADD_MIF: 537 case MRT6_DEL_MIF: 538 case MRT6_ADD_MFC: 539 case MRT6_DEL_MFC: 540 case MRT6_PIM: 541 error = ip6_mrouter_set(so, sopt); 542 break; 543 case IPV6_CHECKSUM: 544 error = ip6_raw_ctloutput(so, sopt); 545 break; 546 default: 547 error = ip6_ctloutput(so, sopt); 548 break; 549 } 550 break; 551 } 552 553 return (error); 554} 555 556static int 557rip6_attach(struct socket *so, int proto, struct thread *td) 558{ 559 struct inpcb *inp; 560 struct icmp6_filter *filter; 561 int error, s; 562 563 INP_INFO_WLOCK(&ripcbinfo); 564 inp = sotoinpcb(so); 565 if (inp) { 566 INP_INFO_WUNLOCK(&ripcbinfo); 567 panic("rip6_attach"); 568 } 569 if (td && (error = suser(td)) != 0) { 570 INP_INFO_WUNLOCK(&ripcbinfo); 571 return error; 572 } 573 error = soreserve(so, rip_sendspace, rip_recvspace); 574 if (error) { 575 INP_INFO_WUNLOCK(&ripcbinfo); 576 return error; 577 } 578 MALLOC(filter, struct icmp6_filter *, 579 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 580 if (filter == NULL) 581 return ENOMEM; 582 s = splnet(); 583 error = in_pcballoc(so, &ripcbinfo, "raw6inp"); 584 splx(s); 585 if (error) { 586 INP_INFO_WUNLOCK(&ripcbinfo); 587 FREE(filter, M_PCB); 588 return error; 589 } 590 inp = (struct inpcb *)so->so_pcb; 591 INP_LOCK(inp); 592 INP_INFO_WUNLOCK(&ripcbinfo); 593 inp->inp_vflag |= INP_IPV6; 594 inp->in6p_ip6_nxt = (long)proto; 595 inp->in6p_hops = -1; /* use kernel default */ 596 inp->in6p_cksum = -1; 597 inp->in6p_icmp6filt = filter; 598 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 599 INP_UNLOCK(inp); 600 return 0; 601} 602 603static int 604rip6_detach(struct socket *so) 605{ 606 struct inpcb *inp; 607 608 INP_INFO_WLOCK(&ripcbinfo); 609 inp = sotoinpcb(so); 610 if (inp == 0) { 611 INP_INFO_WUNLOCK(&ripcbinfo); 612 panic("rip6_detach"); 613 } 614 /* xxx: RSVP */ 615 if (so == ip6_mrouter) 616 ip6_mrouter_done(); 617 if (inp->in6p_icmp6filt) { 618 FREE(inp->in6p_icmp6filt, M_PCB); 619 inp->in6p_icmp6filt = NULL; 620 } 621 INP_LOCK(inp); 622 in6_pcbdetach(inp); 623 INP_INFO_WUNLOCK(&ripcbinfo); 624 return 0; 625} 626 627static int 628rip6_abort(struct socket *so) 629{ 630 soisdisconnected(so); 631 return rip6_detach(so); 632} 633 634static int 635rip6_disconnect(struct socket *so) 636{ 637 struct inpcb *inp = sotoinpcb(so); 638 639 if ((so->so_state & SS_ISCONNECTED) == 0) 640 return ENOTCONN; 641 inp->in6p_faddr = in6addr_any; 642 return rip6_abort(so); 643} 644 645static int 646rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 647{ 648 struct inpcb *inp = sotoinpcb(so); 649 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 650 struct ifaddr *ia = NULL; 651 652 if (nam->sa_len != sizeof(*addr)) 653 return EINVAL; 654 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 655 return EADDRNOTAVAIL; 656#ifdef ENABLE_DEFAULT_SCOPE 657 if (addr->sin6_scope_id == 0) { /* not change if specified */ 658 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 659 } 660#endif 661 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 662 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 663 return EADDRNOTAVAIL; 664 if (ia && 665 ((struct in6_ifaddr *)ia)->ia6_flags & 666 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 667 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 668 return (EADDRNOTAVAIL); 669 } 670 INP_INFO_WLOCK(&ripcbinfo); 671 INP_LOCK(inp); 672 inp->in6p_laddr = addr->sin6_addr; 673 INP_UNLOCK(inp); 674 INP_INFO_WUNLOCK(&ripcbinfo); 675 return 0; 676} 677 678static int 679rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 680{ 681 struct inpcb *inp = sotoinpcb(so); 682 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 683 struct in6_addr *in6a = NULL; 684 int error = 0; 685#ifdef ENABLE_DEFAULT_SCOPE 686 struct sockaddr_in6 tmp; 687#endif 688 689 if (nam->sa_len != sizeof(*addr)) 690 return EINVAL; 691 if (TAILQ_EMPTY(&ifnet)) 692 return EADDRNOTAVAIL; 693 if (addr->sin6_family != AF_INET6) 694 return EAFNOSUPPORT; 695#ifdef ENABLE_DEFAULT_SCOPE 696 if (addr->sin6_scope_id == 0) { /* not change if specified */ 697 /* avoid overwrites */ 698 tmp = *addr; 699 addr = &tmp; 700 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 701 } 702#endif 703 INP_INFO_WLOCK(&ripcbinfo); 704 INP_LOCK(inp); 705 /* Source address selection. XXX: need pcblookup? */ 706 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 707 inp->in6p_moptions, NULL, 708 &inp->in6p_laddr, &error); 709 if (in6a == NULL) { 710 INP_UNLOCK(inp); 711 INP_INFO_WUNLOCK(&ripcbinfo); 712 return (error ? error : EADDRNOTAVAIL); 713 } 714 inp->in6p_laddr = *in6a; 715 inp->in6p_faddr = addr->sin6_addr; 716 soisconnected(so); 717 INP_UNLOCK(inp); 718 INP_INFO_WUNLOCK(&ripcbinfo); 719 return 0; 720} 721 722static int 723rip6_shutdown(struct socket *so) 724{ 725 struct inpcb *inp; 726 727 INP_INFO_RLOCK(&ripcbinfo); 728 inp = sotoinpcb(so); 729 INP_LOCK(inp); 730 INP_INFO_RUNLOCK(&ripcbinfo); 731 socantsendmore(so); 732 INP_UNLOCK(inp); 733 return 0; 734} 735 736static int 737rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 738 struct mbuf *control, struct thread *td) 739{ 740 struct inpcb *inp = sotoinpcb(so); 741 struct sockaddr_in6 tmp; 742 struct sockaddr_in6 *dst; 743 int ret; 744 745 INP_INFO_WLOCK(&ripcbinfo); 746 /* always copy sockaddr to avoid overwrites */ 747 /* Unlocked read. */ 748 if (so->so_state & SS_ISCONNECTED) { 749 if (nam) { 750 INP_INFO_WUNLOCK(&ripcbinfo); 751 m_freem(m); 752 return EISCONN; 753 } 754 /* XXX */ 755 bzero(&tmp, sizeof(tmp)); 756 tmp.sin6_family = AF_INET6; 757 tmp.sin6_len = sizeof(struct sockaddr_in6); 758 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 759 sizeof(struct in6_addr)); 760 dst = &tmp; 761 } else { 762 if (nam == NULL) { 763 INP_INFO_WUNLOCK(&ripcbinfo); 764 m_freem(m); 765 return ENOTCONN; 766 } 767 tmp = *(struct sockaddr_in6 *)nam; 768 dst = &tmp; 769 } 770#ifdef ENABLE_DEFAULT_SCOPE 771 if (dst->sin6_scope_id == 0) { /* not change if specified */ 772 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 773 } 774#endif 775 ret = rip6_output(m, so, dst, control); 776 INP_INFO_WUNLOCK(&ripcbinfo); 777 return (ret); 778} 779 780struct pr_usrreqs rip6_usrreqs = { 781 .pru_abort = rip6_abort, 782 .pru_attach = rip6_attach, 783 .pru_bind = rip6_bind, 784 .pru_connect = rip6_connect, 785 .pru_control = in6_control, 786 .pru_detach = rip6_detach, 787 .pru_disconnect = rip6_disconnect, 788 .pru_peeraddr = in6_setpeeraddr, 789 .pru_send = rip6_send, 790 .pru_shutdown = rip6_shutdown, 791 .pru_sockaddr = in6_setsockaddr, 792}; 793