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 * $FreeBSD$ 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 */ 117 118 extern struct inpcbhead ripcb; 119 extern struct inpcbinfo ripcbinfo; 120 extern u_long rip_sendspace; 121 extern u_long rip_recvspace; 122 123 struct 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 */ 130 int 131 rip6_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) { 156 docontinue: 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 } 258 259 void 260 rip6_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 */ 310 int 311 #if __STDC__ 312 rip6_output(struct mbuf *m, ...) 313 #else 314 rip6_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, *stickyopt = NULL; 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 stickyopt = in6p->in6p_outputopts; 343 344 priv = 0; 345 if (so->so_cred->cr_uid == 0) 346 priv = 1; 347 dst = &dstsock->sin6_addr; 348 if (control) { 349 if ((error = ip6_setpktoptions(control, &opt, 350 stickyopt, priv, 0, 351 so->so_proto->pr_protocol)) 352 != 0) { 353 goto bad; 354 } 355 in6p->in6p_outputopts = &opt; 356 } 357 358 /* 359 * For an ICMPv6 packet, we should know its type and code 360 * to update statistics. 361 */ 362 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 363 struct icmp6_hdr *icmp6; 364 if (m->m_len < sizeof(struct icmp6_hdr) && 365 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 366 error = ENOBUFS; 367 goto bad; 368 } 369 icmp6 = mtod(m, struct icmp6_hdr *); 370 type = icmp6->icmp6_type; 371 code = icmp6->icmp6_code; 372 } 373 374 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 375 if (m == NULL) { 376 error = ENOBUFS; 377 goto bad; 378 } 379 ip6 = mtod(m, struct ip6_hdr *); 380 381 /* 382 * Next header might not be ICMP6 but use its pseudo header anyway. 383 */ 384 ip6->ip6_dst = *dst; 385 386 /* 387 * If the scope of the destination is link-local, embed the interface 388 * index in the address. 389 * 390 * XXX advanced-api value overrides sin6_scope_id 391 */ 392 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 393 struct in6_pktinfo *pi; 394 395 /* 396 * XXX Boundary check is assumed to be already done in 397 * ip6_setpktoptions(). 398 */ 399 if (in6p->in6p_outputopts && 400 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 401 pi->ipi6_ifindex) { 402 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 403 oifp = ifnet_byindex(pi->ipi6_ifindex); 404 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 405 in6p->in6p_moptions && 406 in6p->in6p_moptions->im6o_multicast_ifp) { 407 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 408 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 409 } else if (dstsock->sin6_scope_id) { 410 /* boundary check */ 411 if (dstsock->sin6_scope_id < 0 || 412 if_index < dstsock->sin6_scope_id) { 413 error = ENXIO; /* XXX EINVAL? */ 414 goto bad; 415 } 416 ip6->ip6_dst.s6_addr16[1] = 417 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */ 418 } 419 } 420 421 /* 422 * Source address selection. 423 */ 424 if ((in6a = in6_selectsrc(dstsock, in6p->in6p_outputopts, 425 in6p->in6p_moptions, NULL, &in6p->in6p_laddr, &error)) == 0) { 426 if (error == 0) 427 error = EADDRNOTAVAIL; 428 goto bad; 429 } 430 ip6->ip6_src = *in6a; 431 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 432 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 433 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 434 (IPV6_VERSION & IPV6_VERSION_MASK); 435 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 436 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 437 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 438 439 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 440 in6p->in6p_cksum != -1) { 441 struct mbuf *n; 442 int off; 443 u_int16_t *p; 444 445 /* compute checksum */ 446 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 447 off = offsetof(struct icmp6_hdr, icmp6_cksum); 448 else 449 off = in6p->in6p_cksum; 450 if (plen < off + 1) { 451 error = EINVAL; 452 goto bad; 453 } 454 off += sizeof(struct ip6_hdr); 455 456 n = m; 457 while (n && n->m_len <= off) { 458 off -= n->m_len; 459 n = n->m_next; 460 } 461 if (!n) 462 goto bad; 463 p = (u_int16_t *)(mtod(n, caddr_t) + off); 464 *p = 0; 465 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 466 } 467 468 error = ip6_output(m, in6p->in6p_outputopts, NULL, 0, 469 in6p->in6p_moptions, &oifp, in6p); 470 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 471 if (oifp) 472 icmp6_ifoutstat_inc(oifp, type, code); 473 icmp6stat.icp6s_outhist[type]++; 474 } else 475 rip6stat.rip6s_opackets++; 476 477 goto freectl; 478 479 bad: 480 if (m) 481 m_freem(m); 482 483 freectl: 484 if (control) { 485 ip6_clearpktopts(in6p->in6p_outputopts, -1); 486 in6p->in6p_outputopts = stickyopt; 487 m_freem(control); 488 } 489 INP_UNLOCK(in6p); 490 return (error); 491 } 492 493 /* 494 * Raw IPv6 socket option processing. 495 */ 496 int 497 rip6_ctloutput(so, sopt) 498 struct socket *so; 499 struct sockopt *sopt; 500 { 501 int error; 502 503 if (sopt->sopt_level == IPPROTO_ICMPV6) 504 /* 505 * XXX: is it better to call icmp6_ctloutput() directly 506 * from protosw? 507 */ 508 return (icmp6_ctloutput(so, sopt)); 509 else if (sopt->sopt_level != IPPROTO_IPV6) 510 return (EINVAL); 511 512 error = 0; 513 514 switch (sopt->sopt_dir) { 515 case SOPT_GET: 516 switch (sopt->sopt_name) { 517 case MRT6_INIT: 518 case MRT6_DONE: 519 case MRT6_ADD_MIF: 520 case MRT6_DEL_MIF: 521 case MRT6_ADD_MFC: 522 case MRT6_DEL_MFC: 523 case MRT6_PIM: 524 error = ip6_mrouter_get(so, sopt); 525 break; 526 case IPV6_CHECKSUM: 527 error = ip6_raw_ctloutput(so, sopt); 528 break; 529 default: 530 error = ip6_ctloutput(so, sopt); 531 break; 532 } 533 break; 534 535 case SOPT_SET: 536 switch (sopt->sopt_name) { 537 case MRT6_INIT: 538 case MRT6_DONE: 539 case MRT6_ADD_MIF: 540 case MRT6_DEL_MIF: 541 case MRT6_ADD_MFC: 542 case MRT6_DEL_MFC: 543 case MRT6_PIM: 544 error = ip6_mrouter_set(so, sopt); 545 break; 546 case IPV6_CHECKSUM: 547 error = ip6_raw_ctloutput(so, sopt); 548 break; 549 default: 550 error = ip6_ctloutput(so, sopt); 551 break; 552 } 553 break; 554 } 555 556 return (error); 557 } 558 559 static int 560 rip6_attach(struct socket *so, int proto, struct thread *td) 561 { 562 struct inpcb *inp; 563 int error, s; 564 565 INP_INFO_WLOCK(&ripcbinfo); 566 inp = sotoinpcb(so); 567 if (inp) { 568 INP_INFO_WUNLOCK(&ripcbinfo); 569 panic("rip6_attach"); 570 } 571 if (td && (error = suser(td)) != 0) { 572 INP_INFO_WUNLOCK(&ripcbinfo); 573 return error; 574 } 575 error = soreserve(so, rip_sendspace, rip_recvspace); 576 if (error) { 577 INP_INFO_WUNLOCK(&ripcbinfo); 578 return error; 579 } 580 s = splnet(); 581 error = in_pcballoc(so, &ripcbinfo, "raw6inp"); 582 splx(s); 583 if (error) { 584 INP_INFO_WUNLOCK(&ripcbinfo); 585 return error; 586 } 587 inp = (struct inpcb *)so->so_pcb; 588 INP_LOCK(inp); 589 INP_INFO_WUNLOCK(&ripcbinfo); 590 inp->inp_vflag |= INP_IPV6; 591 inp->in6p_ip6_nxt = (long)proto; 592 inp->in6p_hops = -1; /* use kernel default */ 593 inp->in6p_cksum = -1; 594 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 595 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 596 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 597 INP_UNLOCK(inp); 598 return 0; 599 } 600 601 static int 602 rip6_detach(struct socket *so) 603 { 604 struct inpcb *inp; 605 606 INP_INFO_WLOCK(&ripcbinfo); 607 inp = sotoinpcb(so); 608 if (inp == 0) { 609 INP_INFO_WUNLOCK(&ripcbinfo); 610 panic("rip6_detach"); 611 } 612 /* xxx: RSVP */ 613 if (so == ip6_mrouter) 614 ip6_mrouter_done(); 615 if (inp->in6p_icmp6filt) { 616 FREE(inp->in6p_icmp6filt, M_PCB); 617 inp->in6p_icmp6filt = NULL; 618 } 619 INP_LOCK(inp); 620 in6_pcbdetach(inp); 621 INP_INFO_WUNLOCK(&ripcbinfo); 622 return 0; 623 } 624 625 static int 626 rip6_abort(struct socket *so) 627 { 628 soisdisconnected(so); 629 return rip6_detach(so); 630 } 631 632 static int 633 rip6_disconnect(struct socket *so) 634 { 635 struct inpcb *inp = sotoinpcb(so); 636 637 if ((so->so_state & SS_ISCONNECTED) == 0) 638 return ENOTCONN; 639 inp->in6p_faddr = in6addr_any; 640 return rip6_abort(so); 641 } 642 643 static int 644 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 645 { 646 struct inpcb *inp = sotoinpcb(so); 647 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 648 struct ifaddr *ia = NULL; 649 650 if (nam->sa_len != sizeof(*addr)) 651 return EINVAL; 652 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 653 return EADDRNOTAVAIL; 654 #ifdef ENABLE_DEFAULT_SCOPE 655 if (addr->sin6_scope_id == 0) { /* not change if specified */ 656 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 657 } 658 #endif 659 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 660 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 661 return EADDRNOTAVAIL; 662 if (ia && 663 ((struct in6_ifaddr *)ia)->ia6_flags & 664 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 665 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 666 return (EADDRNOTAVAIL); 667 } 668 INP_INFO_WLOCK(&ripcbinfo); 669 INP_LOCK(inp); 670 inp->in6p_laddr = addr->sin6_addr; 671 INP_UNLOCK(inp); 672 INP_INFO_WUNLOCK(&ripcbinfo); 673 return 0; 674 } 675 676 static int 677 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 678 { 679 struct inpcb *inp = sotoinpcb(so); 680 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 681 struct in6_addr *in6a = NULL; 682 int error = 0; 683 #ifdef ENABLE_DEFAULT_SCOPE 684 struct sockaddr_in6 tmp; 685 #endif 686 687 if (nam->sa_len != sizeof(*addr)) 688 return EINVAL; 689 if (TAILQ_EMPTY(&ifnet)) 690 return EADDRNOTAVAIL; 691 if (addr->sin6_family != AF_INET6) 692 return EAFNOSUPPORT; 693 #ifdef ENABLE_DEFAULT_SCOPE 694 if (addr->sin6_scope_id == 0) { /* not change if specified */ 695 /* avoid overwrites */ 696 tmp = *addr; 697 addr = &tmp; 698 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 699 } 700 #endif 701 INP_INFO_WLOCK(&ripcbinfo); 702 INP_LOCK(inp); 703 /* Source address selection. XXX: need pcblookup? */ 704 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 705 inp->in6p_moptions, NULL, 706 &inp->in6p_laddr, &error); 707 if (in6a == NULL) { 708 INP_UNLOCK(inp); 709 INP_INFO_WUNLOCK(&ripcbinfo); 710 return (error ? error : EADDRNOTAVAIL); 711 } 712 inp->in6p_laddr = *in6a; 713 inp->in6p_faddr = addr->sin6_addr; 714 soisconnected(so); 715 INP_UNLOCK(inp); 716 INP_INFO_WUNLOCK(&ripcbinfo); 717 return 0; 718 } 719 720 static int 721 rip6_shutdown(struct socket *so) 722 { 723 struct inpcb *inp; 724 725 INP_INFO_RLOCK(&ripcbinfo); 726 inp = sotoinpcb(so); 727 INP_LOCK(inp); 728 INP_INFO_RUNLOCK(&ripcbinfo); 729 socantsendmore(so); 730 INP_UNLOCK(inp); 731 return 0; 732 } 733 734 static int 735 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 736 struct mbuf *control, struct thread *td) 737 { 738 struct inpcb *inp = sotoinpcb(so); 739 struct sockaddr_in6 tmp; 740 struct sockaddr_in6 *dst; 741 int ret; 742 743 INP_INFO_WLOCK(&ripcbinfo); 744 /* always copy sockaddr to avoid overwrites */ 745 /* Unlocked read. */ 746 if (so->so_state & SS_ISCONNECTED) { 747 if (nam) { 748 INP_INFO_WUNLOCK(&ripcbinfo); 749 m_freem(m); 750 return EISCONN; 751 } 752 /* XXX */ 753 bzero(&tmp, sizeof(tmp)); 754 tmp.sin6_family = AF_INET6; 755 tmp.sin6_len = sizeof(struct sockaddr_in6); 756 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 757 sizeof(struct in6_addr)); 758 dst = &tmp; 759 } else { 760 if (nam == NULL) { 761 INP_INFO_WUNLOCK(&ripcbinfo); 762 m_freem(m); 763 return ENOTCONN; 764 } 765 tmp = *(struct sockaddr_in6 *)nam; 766 dst = &tmp; 767 } 768 #ifdef ENABLE_DEFAULT_SCOPE 769 if (dst->sin6_scope_id == 0) { /* not change if specified */ 770 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 771 } 772 #endif 773 ret = rip6_output(m, so, dst, control); 774 INP_INFO_WUNLOCK(&ripcbinfo); 775 return (ret); 776 } 777 778 struct pr_usrreqs rip6_usrreqs = { 779 .pru_abort = rip6_abort, 780 .pru_attach = rip6_attach, 781 .pru_bind = rip6_bind, 782 .pru_connect = rip6_connect, 783 .pru_control = in6_control, 784 .pru_detach = rip6_detach, 785 .pru_disconnect = rip6_disconnect, 786 .pru_peeraddr = in6_setpeeraddr, 787 .pru_send = rip6_send, 788 .pru_shutdown = rip6_shutdown, 789 .pru_sockaddr = in6_setsockaddr, 790 }; 791