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_RLOCK(&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(&ripcb, sa, 0, (const struct sockaddr *)sa6_src, 302 0, cmd, cmdarg, notify); 303 } 304 305 /* 306 * Generate IPv6 header and pass packet to ip6_output. 307 * Tack on options user may have setup with control call. 308 */ 309 int 310 #if __STDC__ 311 rip6_output(struct mbuf *m, ...) 312 #else 313 rip6_output(m, va_alist) 314 struct mbuf *m; 315 va_dcl 316 #endif 317 { 318 struct mbuf *control; 319 struct socket *so; 320 struct sockaddr_in6 *dstsock; 321 struct in6_addr *dst; 322 struct ip6_hdr *ip6; 323 struct inpcb *in6p; 324 u_int plen = m->m_pkthdr.len; 325 int error = 0; 326 struct ip6_pktopts opt, *stickyopt = NULL; 327 struct ifnet *oifp = NULL; 328 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 329 int priv = 0; 330 struct in6_addr *in6a; 331 va_list ap; 332 333 va_start(ap, m); 334 so = va_arg(ap, struct socket *); 335 dstsock = va_arg(ap, struct sockaddr_in6 *); 336 control = va_arg(ap, struct mbuf *); 337 va_end(ap); 338 339 in6p = sotoin6pcb(so); 340 /* 341 * XXXRW: In IPv6, we don't start referencing the contents of the 342 * inpcb until after all M_TRYWAIT allocations have finished. We may 343 * want to reorder this function to provide similar guarantees here, 344 * so as to avoid holding a mutex over M_TRYWAIT. 345 */ 346 INP_LOCK(in6p); 347 stickyopt = in6p->in6p_outputopts; 348 349 priv = 0; 350 if (so->so_cred->cr_uid == 0) 351 priv = 1; 352 dst = &dstsock->sin6_addr; 353 if (control) { 354 if ((error = ip6_setpktoptions(control, &opt, 355 stickyopt, priv, 0, 356 so->so_proto->pr_protocol)) 357 != 0) { 358 goto bad; 359 } 360 in6p->in6p_outputopts = &opt; 361 } 362 363 /* 364 * For an ICMPv6 packet, we should know its type and code 365 * to update statistics. 366 */ 367 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 368 struct icmp6_hdr *icmp6; 369 if (m->m_len < sizeof(struct icmp6_hdr) && 370 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 371 error = ENOBUFS; 372 goto bad; 373 } 374 icmp6 = mtod(m, struct icmp6_hdr *); 375 type = icmp6->icmp6_type; 376 code = icmp6->icmp6_code; 377 } 378 379 M_PREPEND(m, sizeof(*ip6), M_TRYWAIT); 380 ip6 = mtod(m, struct ip6_hdr *); 381 382 /* 383 * Next header might not be ICMP6 but use its pseudo header anyway. 384 */ 385 ip6->ip6_dst = *dst; 386 387 /* 388 * If the scope of the destination is link-local, embed the interface 389 * index in the address. 390 * 391 * XXX advanced-api value overrides sin6_scope_id 392 */ 393 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 394 struct in6_pktinfo *pi; 395 396 /* 397 * XXX Boundary check is assumed to be already done in 398 * ip6_setpktoptions(). 399 */ 400 if (in6p->in6p_outputopts && 401 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 402 pi->ipi6_ifindex) { 403 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 404 oifp = ifnet_byindex(pi->ipi6_ifindex); 405 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 406 in6p->in6p_moptions && 407 in6p->in6p_moptions->im6o_multicast_ifp) { 408 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 409 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 410 } else if (dstsock->sin6_scope_id) { 411 /* boundary check */ 412 if (dstsock->sin6_scope_id < 0 || 413 if_index < dstsock->sin6_scope_id) { 414 error = ENXIO; /* XXX EINVAL? */ 415 goto bad; 416 } 417 ip6->ip6_dst.s6_addr16[1] = 418 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */ 419 } 420 } 421 422 /* 423 * Source address selection. 424 */ 425 if ((in6a = in6_selectsrc(dstsock, in6p->in6p_outputopts, 426 in6p->in6p_moptions, NULL, &in6p->in6p_laddr, &error)) == 0) { 427 if (error == 0) 428 error = EADDRNOTAVAIL; 429 goto bad; 430 } 431 ip6->ip6_src = *in6a; 432 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 433 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 434 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 435 (IPV6_VERSION & IPV6_VERSION_MASK); 436 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 437 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 438 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 439 440 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 441 in6p->in6p_cksum != -1) { 442 struct mbuf *n; 443 int off; 444 u_int16_t *p; 445 446 /* compute checksum */ 447 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 448 off = offsetof(struct icmp6_hdr, icmp6_cksum); 449 else 450 off = in6p->in6p_cksum; 451 if (plen < off + 1) { 452 error = EINVAL; 453 goto bad; 454 } 455 off += sizeof(struct ip6_hdr); 456 457 n = m; 458 while (n && n->m_len <= off) { 459 off -= n->m_len; 460 n = n->m_next; 461 } 462 if (!n) 463 goto bad; 464 p = (u_int16_t *)(mtod(n, caddr_t) + off); 465 *p = 0; 466 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 467 } 468 469 error = ip6_output(m, in6p->in6p_outputopts, NULL, 0, 470 in6p->in6p_moptions, &oifp, in6p); 471 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 472 if (oifp) 473 icmp6_ifoutstat_inc(oifp, type, code); 474 icmp6stat.icp6s_outhist[type]++; 475 } else 476 rip6stat.rip6s_opackets++; 477 478 goto freectl; 479 480 bad: 481 if (m) 482 m_freem(m); 483 484 freectl: 485 if (control) { 486 ip6_clearpktopts(in6p->in6p_outputopts, -1); 487 in6p->in6p_outputopts = stickyopt; 488 m_freem(control); 489 } 490 INP_UNLOCK(in6p); 491 return (error); 492 } 493 494 /* 495 * Raw IPv6 socket option processing. 496 */ 497 int 498 rip6_ctloutput(so, sopt) 499 struct socket *so; 500 struct sockopt *sopt; 501 { 502 int error; 503 504 if (sopt->sopt_level == IPPROTO_ICMPV6) 505 /* 506 * XXX: is it better to call icmp6_ctloutput() directly 507 * from protosw? 508 */ 509 return (icmp6_ctloutput(so, sopt)); 510 else if (sopt->sopt_level != IPPROTO_IPV6) 511 return (EINVAL); 512 513 error = 0; 514 515 switch (sopt->sopt_dir) { 516 case SOPT_GET: 517 switch (sopt->sopt_name) { 518 case MRT6_INIT: 519 case MRT6_DONE: 520 case MRT6_ADD_MIF: 521 case MRT6_DEL_MIF: 522 case MRT6_ADD_MFC: 523 case MRT6_DEL_MFC: 524 case MRT6_PIM: 525 error = ip6_mrouter_get(so, sopt); 526 break; 527 case IPV6_CHECKSUM: 528 error = ip6_raw_ctloutput(so, sopt); 529 break; 530 default: 531 error = ip6_ctloutput(so, sopt); 532 break; 533 } 534 break; 535 536 case SOPT_SET: 537 switch (sopt->sopt_name) { 538 case MRT6_INIT: 539 case MRT6_DONE: 540 case MRT6_ADD_MIF: 541 case MRT6_DEL_MIF: 542 case MRT6_ADD_MFC: 543 case MRT6_DEL_MFC: 544 case MRT6_PIM: 545 error = ip6_mrouter_set(so, sopt); 546 break; 547 case IPV6_CHECKSUM: 548 error = ip6_raw_ctloutput(so, sopt); 549 break; 550 default: 551 error = ip6_ctloutput(so, sopt); 552 break; 553 } 554 break; 555 } 556 557 return (error); 558 } 559 560 static int 561 rip6_attach(struct socket *so, int proto, struct thread *td) 562 { 563 struct inpcb *inp; 564 int error, s; 565 566 INP_INFO_WLOCK(&ripcbinfo); 567 inp = sotoinpcb(so); 568 if (inp) { 569 INP_INFO_WUNLOCK(&ripcbinfo); 570 panic("rip6_attach"); 571 } 572 if (td && (error = suser(td)) != 0) { 573 INP_INFO_WUNLOCK(&ripcbinfo); 574 return error; 575 } 576 error = soreserve(so, rip_sendspace, rip_recvspace); 577 if (error) { 578 INP_INFO_WUNLOCK(&ripcbinfo); 579 return error; 580 } 581 s = splnet(); 582 error = in_pcballoc(so, &ripcbinfo, "raw6inp"); 583 splx(s); 584 if (error) { 585 INP_INFO_WUNLOCK(&ripcbinfo); 586 return error; 587 } 588 inp = (struct inpcb *)so->so_pcb; 589 INP_LOCK(inp); 590 INP_INFO_WUNLOCK(&ripcbinfo); 591 inp->inp_vflag |= INP_IPV6; 592 inp->in6p_ip6_nxt = (long)proto; 593 inp->in6p_hops = -1; /* use kernel default */ 594 inp->in6p_cksum = -1; 595 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 596 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 597 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 598 INP_UNLOCK(inp); 599 return 0; 600 } 601 602 static int 603 rip6_detach(struct socket *so) 604 { 605 struct inpcb *inp; 606 607 INP_INFO_WLOCK(&ripcbinfo); 608 inp = sotoinpcb(so); 609 if (inp == 0) { 610 INP_INFO_WUNLOCK(&ripcbinfo); 611 panic("rip6_detach"); 612 } 613 /* xxx: RSVP */ 614 if (so == ip6_mrouter) 615 ip6_mrouter_done(); 616 if (inp->in6p_icmp6filt) { 617 FREE(inp->in6p_icmp6filt, M_PCB); 618 inp->in6p_icmp6filt = NULL; 619 } 620 INP_LOCK(inp); 621 in6_pcbdetach(inp); 622 INP_INFO_WUNLOCK(&ripcbinfo); 623 return 0; 624 } 625 626 static int 627 rip6_abort(struct socket *so) 628 { 629 soisdisconnected(so); 630 return rip6_detach(so); 631 } 632 633 static int 634 rip6_disconnect(struct socket *so) 635 { 636 struct inpcb *inp = sotoinpcb(so); 637 638 if ((so->so_state & SS_ISCONNECTED) == 0) 639 return ENOTCONN; 640 inp->in6p_faddr = in6addr_any; 641 return rip6_abort(so); 642 } 643 644 static int 645 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 646 { 647 struct inpcb *inp = sotoinpcb(so); 648 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 649 struct ifaddr *ia = NULL; 650 651 if (nam->sa_len != sizeof(*addr)) 652 return EINVAL; 653 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 654 return EADDRNOTAVAIL; 655 #ifdef ENABLE_DEFAULT_SCOPE 656 if (addr->sin6_scope_id == 0) { /* not change if specified */ 657 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 658 } 659 #endif 660 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 661 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 662 return EADDRNOTAVAIL; 663 if (ia && 664 ((struct in6_ifaddr *)ia)->ia6_flags & 665 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 666 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 667 return (EADDRNOTAVAIL); 668 } 669 INP_INFO_WLOCK(&ripcbinfo); 670 INP_LOCK(inp); 671 inp->in6p_laddr = addr->sin6_addr; 672 INP_UNLOCK(inp); 673 INP_INFO_WUNLOCK(&ripcbinfo); 674 return 0; 675 } 676 677 static int 678 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 679 { 680 struct inpcb *inp = sotoinpcb(so); 681 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 682 struct in6_addr *in6a = NULL; 683 int error = 0; 684 #ifdef ENABLE_DEFAULT_SCOPE 685 struct sockaddr_in6 tmp; 686 #endif 687 688 if (nam->sa_len != sizeof(*addr)) 689 return EINVAL; 690 if (TAILQ_EMPTY(&ifnet)) 691 return EADDRNOTAVAIL; 692 if (addr->sin6_family != AF_INET6) 693 return EAFNOSUPPORT; 694 #ifdef ENABLE_DEFAULT_SCOPE 695 if (addr->sin6_scope_id == 0) { /* not change if specified */ 696 /* avoid overwrites */ 697 tmp = *addr; 698 addr = &tmp; 699 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 700 } 701 #endif 702 INP_INFO_WLOCK(&ripcbinfo); 703 INP_LOCK(inp); 704 /* Source address selection. XXX: need pcblookup? */ 705 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 706 inp->in6p_moptions, NULL, 707 &inp->in6p_laddr, &error); 708 if (in6a == NULL) { 709 INP_UNLOCK(inp); 710 INP_INFO_WUNLOCK(&ripcbinfo); 711 return (error ? error : EADDRNOTAVAIL); 712 } 713 inp->in6p_laddr = *in6a; 714 inp->in6p_faddr = addr->sin6_addr; 715 soisconnected(so); 716 INP_UNLOCK(inp); 717 INP_INFO_WUNLOCK(&ripcbinfo); 718 return 0; 719 } 720 721 static int 722 rip6_shutdown(struct socket *so) 723 { 724 struct inpcb *inp; 725 726 INP_INFO_RLOCK(&ripcbinfo); 727 inp = sotoinpcb(so); 728 INP_LOCK(inp); 729 INP_INFO_RUNLOCK(&ripcbinfo); 730 socantsendmore(so); 731 INP_UNLOCK(inp); 732 return 0; 733 } 734 735 static int 736 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 737 struct mbuf *control, struct thread *td) 738 { 739 struct inpcb *inp = sotoinpcb(so); 740 struct sockaddr_in6 tmp; 741 struct sockaddr_in6 *dst; 742 int ret; 743 744 INP_INFO_WLOCK(&ripcbinfo); 745 /* always copy sockaddr to avoid overwrites */ 746 /* Unlocked read. */ 747 if (so->so_state & SS_ISCONNECTED) { 748 if (nam) { 749 INP_INFO_WUNLOCK(&ripcbinfo); 750 m_freem(m); 751 return EISCONN; 752 } 753 /* XXX */ 754 bzero(&tmp, sizeof(tmp)); 755 tmp.sin6_family = AF_INET6; 756 tmp.sin6_len = sizeof(struct sockaddr_in6); 757 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 758 sizeof(struct in6_addr)); 759 dst = &tmp; 760 } else { 761 if (nam == NULL) { 762 INP_INFO_WUNLOCK(&ripcbinfo); 763 m_freem(m); 764 return ENOTCONN; 765 } 766 tmp = *(struct sockaddr_in6 *)nam; 767 dst = &tmp; 768 } 769 #ifdef ENABLE_DEFAULT_SCOPE 770 if (dst->sin6_scope_id == 0) { /* not change if specified */ 771 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 772 } 773 #endif 774 ret = rip6_output(m, so, dst, control); 775 INP_INFO_WUNLOCK(&ripcbinfo); 776 return (ret); 777 } 778 779 struct pr_usrreqs rip6_usrreqs = { 780 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 781 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 782 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 783 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 784 in6_setsockaddr, sosend, soreceive, sopoll, pru_sosetlabel_null 785 }; 786