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: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $ 30 * $DragonFly: src/sys/netinet6/raw_ip6.c,v 1.27 2008/09/04 09:08:22 hasso Exp $ 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1988, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include "opt_ipsec.h" 69 #include "opt_inet6.h" 70 71 #include <sys/param.h> 72 #include <sys/malloc.h> 73 #include <sys/proc.h> 74 #include <sys/priv.h> 75 #include <sys/mbuf.h> 76 #include <sys/socket.h> 77 #include <sys/jail.h> 78 #include <sys/protosw.h> 79 #include <sys/socketvar.h> 80 #include <sys/errno.h> 81 #include <sys/systm.h> 82 83 #include <sys/thread2.h> 84 #include <sys/socketvar2.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 #include <net/if_types.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_var.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/ip6.h> 94 #include <netinet6/ip6_var.h> 95 #include <netinet6/ip6_mroute.h> 96 #include <netinet/icmp6.h> 97 #include <netinet/in_pcb.h> 98 #include <netinet6/in6_pcb.h> 99 #include <netinet6/nd6.h> 100 #include <netinet6/ip6protosw.h> 101 #ifdef ENABLE_DEFAULT_SCOPE 102 #include <netinet6/scope6_var.h> 103 #endif 104 #include <netinet6/raw_ip6.h> 105 106 #ifdef IPSEC 107 #include <netinet6/ipsec.h> 108 #include <netinet6/ipsec6.h> 109 #endif /*IPSEC*/ 110 111 #ifdef FAST_IPSEC 112 #include <netproto/ipsec/ipsec.h> 113 #include <netproto/ipsec/ipsec6.h> 114 #endif /* FAST_IPSEC */ 115 116 #include <machine/stdarg.h> 117 118 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 119 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 120 121 /* 122 * Raw interface to IP6 protocol. 123 */ 124 125 extern struct inpcbinfo ripcbinfo; 126 extern u_long rip_sendspace; 127 extern u_long rip_recvspace; 128 129 struct rip6stat rip6stat; 130 131 /* 132 * Setup generic address and protocol structures 133 * for raw_input routine, then pass them along with 134 * mbuf chain. 135 */ 136 int 137 rip6_input(struct mbuf **mp, int *offp, int proto) 138 { 139 struct mbuf *m = *mp; 140 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141 struct inpcb *in6p; 142 struct inpcb *last = 0; 143 struct mbuf *opts = NULL; 144 struct sockaddr_in6 rip6src; 145 146 rip6stat.rip6s_ipackets++; 147 148 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 149 /* XXX send icmp6 host/port unreach? */ 150 m_freem(m); 151 return IPPROTO_DONE; 152 } 153 154 init_sin6(&rip6src, m); /* general init */ 155 156 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 157 if (in6p->in6p_flags & INP_PLACEMARKER) 158 continue; 159 if (!(in6p->in6p_vflag & INP_IPV6)) 160 continue; 161 if (in6p->in6p_ip6_nxt && 162 in6p->in6p_ip6_nxt != proto) 163 continue; 164 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 165 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 166 continue; 167 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 168 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 169 continue; 170 if (in6p->in6p_cksum != -1) { 171 rip6stat.rip6s_isum++; 172 if (in6_cksum(m, ip6->ip6_nxt, *offp, 173 m->m_pkthdr.len - *offp)) { 174 rip6stat.rip6s_badsum++; 175 continue; 176 } 177 } 178 if (last) { 179 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 180 181 #ifdef IPSEC 182 /* 183 * Check AH/ESP integrity. 184 */ 185 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 186 m_freem(n); 187 ipsec6stat.in_polvio++; 188 /* do not inject data into pcb */ 189 } else 190 #endif /*IPSEC*/ 191 #ifdef FAST_IPSEC 192 /* 193 * Check AH/ESP integrity. 194 */ 195 if (n && ipsec6_in_reject(n, last)) { 196 m_freem(n); 197 /* do not inject data into pcb */ 198 } else 199 #endif /*FAST_IPSEC*/ 200 if (n) { 201 if (last->in6p_flags & IN6P_CONTROLOPTS || 202 last->in6p_socket->so_options & SO_TIMESTAMP) 203 ip6_savecontrol(last, &opts, ip6, n); 204 /* strip intermediate headers */ 205 m_adj(n, *offp); 206 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 207 (struct sockaddr *)&rip6src, 208 n, opts) == 0) { 209 m_freem(n); 210 if (opts) 211 m_freem(opts); 212 rip6stat.rip6s_fullsock++; 213 } else 214 sorwakeup(last->in6p_socket); 215 opts = NULL; 216 } 217 } 218 last = in6p; 219 } 220 #ifdef IPSEC 221 /* 222 * Check AH/ESP integrity. 223 */ 224 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 225 m_freem(m); 226 ipsec6stat.in_polvio++; 227 ip6stat.ip6s_delivered--; 228 /* do not inject data into pcb */ 229 } else 230 #endif /*IPSEC*/ 231 #ifdef FAST_IPSEC 232 /* 233 * Check AH/ESP integrity. 234 */ 235 if (last && ipsec6_in_reject(m, last)) { 236 m_freem(m); 237 ip6stat.ip6s_delivered--; 238 /* do not inject data into pcb */ 239 } else 240 #endif /*FAST_IPSEC*/ 241 if (last) { 242 if (last->in6p_flags & IN6P_CONTROLOPTS || 243 last->in6p_socket->so_options & SO_TIMESTAMP) 244 ip6_savecontrol(last, &opts, ip6, m); 245 /* strip intermediate headers */ 246 m_adj(m, *offp); 247 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 248 (struct sockaddr *)&rip6src, m, opts) == 0) { 249 m_freem(m); 250 if (opts) 251 m_freem(opts); 252 rip6stat.rip6s_fullsock++; 253 } else 254 sorwakeup(last->in6p_socket); 255 } else { 256 rip6stat.rip6s_nosock++; 257 if (m->m_flags & M_MCAST) 258 rip6stat.rip6s_nosockmcast++; 259 if (proto == IPPROTO_NONE) 260 m_freem(m); 261 else { 262 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 263 icmp6_error(m, ICMP6_PARAM_PROB, 264 ICMP6_PARAMPROB_NEXTHEADER, 265 prvnxtp - mtod(m, char *)); 266 } 267 ip6stat.ip6s_delivered--; 268 } 269 return IPPROTO_DONE; 270 } 271 272 void 273 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 274 { 275 struct ip6_hdr *ip6; 276 struct mbuf *m; 277 int off = 0; 278 struct ip6ctlparam *ip6cp = NULL; 279 const struct sockaddr_in6 *sa6_src = NULL; 280 void (*notify) (struct inpcb *, int) = in6_rtchange; 281 282 if (sa->sa_family != AF_INET6 || 283 sa->sa_len != sizeof(struct sockaddr_in6)) 284 return; 285 286 if ((unsigned)cmd >= PRC_NCMDS) 287 return; 288 if (PRC_IS_REDIRECT(cmd)) 289 notify = in6_rtchange, d = NULL; 290 else if (cmd == PRC_HOSTDEAD) 291 d = NULL; 292 else if (inet6ctlerrmap[cmd] == 0) 293 return; 294 295 /* if the parameter is from icmp6, decode it. */ 296 if (d != NULL) { 297 ip6cp = (struct ip6ctlparam *)d; 298 m = ip6cp->ip6c_m; 299 ip6 = ip6cp->ip6c_ip6; 300 off = ip6cp->ip6c_off; 301 sa6_src = ip6cp->ip6c_src; 302 } else { 303 m = NULL; 304 ip6 = NULL; 305 sa6_src = &sa6_any; 306 } 307 308 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 309 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 310 } 311 312 /* 313 * Generate IPv6 header and pass packet to ip6_output. 314 * Tack on options user may have setup with control call. 315 */ 316 int 317 rip6_output(struct mbuf *m, struct socket *so, ...) 318 { 319 struct sockaddr_in6 *dstsock; 320 struct mbuf *control; 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, *optp = 0; 327 struct ifnet *oifp = NULL; 328 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 329 int priv = 0; 330 __va_list ap; 331 332 __va_start(ap, so); 333 dstsock = __va_arg(ap, struct sockaddr_in6 *); 334 control = __va_arg(ap, struct mbuf *); 335 __va_end(ap); 336 337 in6p = so->so_pcb; 338 339 priv = 0; 340 if (so->so_cred->cr_uid == 0) 341 priv = 1; 342 dst = &dstsock->sin6_addr; 343 if (control) { 344 if ((error = ip6_setpktoptions(control, &opt, 345 in6p->in6p_outputopts, 346 so->so_proto->pr_protocol, priv)) != 0) 347 goto bad; 348 optp = &opt; 349 } else 350 optp = in6p->in6p_outputopts; 351 352 /* 353 * For an ICMPv6 packet, we should know its type and code 354 * to update statistics. 355 */ 356 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 357 struct icmp6_hdr *icmp6; 358 if (m->m_len < sizeof(struct icmp6_hdr) && 359 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 360 error = ENOBUFS; 361 goto bad; 362 } 363 icmp6 = mtod(m, struct icmp6_hdr *); 364 type = icmp6->icmp6_type; 365 code = icmp6->icmp6_code; 366 } 367 368 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 369 ip6 = mtod(m, struct ip6_hdr *); 370 371 /* 372 * Next header might not be ICMP6 but use its pseudo header anyway. 373 */ 374 ip6->ip6_dst = *dst; 375 376 /* 377 * If the scope of the destination is link-local, embed the interface 378 * index in the address. 379 * 380 * XXX advanced-api value overrides sin6_scope_id 381 */ 382 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 383 struct in6_pktinfo *pi; 384 385 /* 386 * XXX Boundary check is assumed to be already done in 387 * ip6_setpktoptions(). 388 */ 389 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 390 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 391 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 392 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 393 in6p->in6p_moptions && 394 in6p->in6p_moptions->im6o_multicast_ifp) { 395 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 396 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 397 } else if (dstsock->sin6_scope_id) { 398 /* boundary check */ 399 if (dstsock->sin6_scope_id < 0 400 || if_index < dstsock->sin6_scope_id) { 401 error = ENXIO; /* XXX EINVAL? */ 402 goto bad; 403 } 404 ip6->ip6_dst.s6_addr16[1] 405 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 406 } 407 } 408 409 /* 410 * Source address selection. 411 */ 412 { 413 struct in6_addr *in6a; 414 415 if ((in6a = in6_selectsrc(dstsock, optp, 416 in6p->in6p_moptions, 417 &in6p->in6p_route, 418 &in6p->in6p_laddr, 419 &error, NULL)) == NULL) { 420 if (error == 0) 421 error = EADDRNOTAVAIL; 422 goto bad; 423 } 424 ip6->ip6_src = *in6a; 425 if (in6p->in6p_route.ro_rt) 426 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 427 } 428 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 429 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 430 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 431 (IPV6_VERSION & IPV6_VERSION_MASK); 432 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 433 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 434 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 435 436 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 437 in6p->in6p_cksum != -1) { 438 struct mbuf *n; 439 int off; 440 u_int16_t *p; 441 442 /* compute checksum */ 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 444 off = offsetof(struct icmp6_hdr, icmp6_cksum); 445 else 446 off = in6p->in6p_cksum; 447 if (plen < off + 1) { 448 error = EINVAL; 449 goto bad; 450 } 451 off += sizeof(struct ip6_hdr); 452 453 n = m; 454 while (n && n->m_len <= off) { 455 off -= n->m_len; 456 n = n->m_next; 457 } 458 if (!n) 459 goto bad; 460 p = (u_int16_t *)(mtod(n, caddr_t) + off); 461 *p = 0; 462 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 463 } 464 465 error = ip6_output(m, optp, &in6p->in6p_route, 0, 466 in6p->in6p_moptions, &oifp, in6p); 467 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 468 if (oifp) 469 icmp6_ifoutstat_inc(oifp, type, code); 470 icmp6stat.icp6s_outhist[type]++; 471 } else 472 rip6stat.rip6s_opackets++; 473 474 goto freectl; 475 476 bad: 477 if (m) 478 m_freem(m); 479 480 freectl: 481 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 482 RTFREE(optp->ip6po_route.ro_rt); 483 if (control) { 484 if (optp == &opt) 485 ip6_clearpktopts(optp, -1); 486 m_freem(control); 487 } 488 return (error); 489 } 490 491 /* 492 * Raw IPv6 socket option processing. 493 */ 494 int 495 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 496 { 497 int error; 498 499 if (sopt->sopt_level == IPPROTO_ICMPV6) 500 /* 501 * XXX: is it better to call icmp6_ctloutput() directly 502 * from protosw? 503 */ 504 return (icmp6_ctloutput(so, sopt)); 505 else if (sopt->sopt_level != IPPROTO_IPV6) 506 return (EINVAL); 507 508 error = 0; 509 510 switch (sopt->sopt_dir) { 511 case SOPT_GET: 512 switch (sopt->sopt_name) { 513 case MRT6_INIT: 514 case MRT6_DONE: 515 case MRT6_ADD_MIF: 516 case MRT6_DEL_MIF: 517 case MRT6_ADD_MFC: 518 case MRT6_DEL_MFC: 519 case MRT6_PIM: 520 error = ip6_mrouter_get(so, sopt); 521 break; 522 case IPV6_CHECKSUM: 523 error = ip6_raw_ctloutput(so, sopt); 524 break; 525 default: 526 error = ip6_ctloutput(so, sopt); 527 break; 528 } 529 break; 530 531 case SOPT_SET: 532 switch (sopt->sopt_name) { 533 case MRT6_INIT: 534 case MRT6_DONE: 535 case MRT6_ADD_MIF: 536 case MRT6_DEL_MIF: 537 case MRT6_ADD_MFC: 538 case MRT6_DEL_MFC: 539 case MRT6_PIM: 540 error = ip6_mrouter_set(so, sopt); 541 break; 542 case IPV6_CHECKSUM: 543 error = ip6_raw_ctloutput(so, sopt); 544 break; 545 default: 546 error = ip6_ctloutput(so, sopt); 547 break; 548 } 549 break; 550 } 551 552 return (error); 553 } 554 555 static int 556 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 557 { 558 struct inpcb *inp; 559 int error; 560 561 inp = so->so_pcb; 562 if (inp) 563 panic("rip6_attach"); 564 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY); 565 if (error) 566 return error; 567 568 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 569 if (error) 570 return error; 571 crit_enter(); 572 error = in_pcballoc(so, &ripcbinfo); 573 crit_exit(); 574 if (error) 575 return error; 576 inp = (struct inpcb *)so->so_pcb; 577 inp->inp_vflag |= INP_IPV6; 578 inp->in6p_ip6_nxt = (long)proto; 579 inp->in6p_hops = -1; /* use kernel default */ 580 inp->in6p_cksum = -1; 581 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 582 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 583 if (inp->in6p_icmp6filt != NULL) 584 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 585 return 0; 586 } 587 588 static int 589 rip6_detach(struct socket *so) 590 { 591 struct inpcb *inp; 592 593 inp = so->so_pcb; 594 if (inp == NULL) 595 panic("rip6_detach"); 596 /* xxx: RSVP */ 597 if (so == ip6_mrouter) 598 ip6_mrouter_done(); 599 if (inp->in6p_icmp6filt) { 600 FREE(inp->in6p_icmp6filt, M_PCB); 601 inp->in6p_icmp6filt = NULL; 602 } 603 in6_pcbdetach(inp); 604 return 0; 605 } 606 607 /* 608 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 609 * will sofree() it when we return. 610 */ 611 static int 612 rip6_abort(struct socket *so) 613 { 614 int error; 615 616 soisdisconnected(so); 617 error = rip6_detach(so); 618 619 return error; 620 } 621 622 static int 623 rip6_disconnect(struct socket *so) 624 { 625 struct inpcb *inp = so->so_pcb; 626 int error; 627 628 if (!(so->so_state & SS_ISCONNECTED)) 629 return ENOTCONN; 630 inp->in6p_faddr = kin6addr_any; 631 soreference(so); 632 error = rip6_abort(so); 633 sofree(so); 634 635 return error; 636 } 637 638 static int 639 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 640 { 641 struct inpcb *inp = so->so_pcb; 642 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 643 struct ifaddr *ia = NULL; 644 645 if (nam->sa_len != sizeof(*addr)) 646 return EINVAL; 647 648 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 649 return EADDRNOTAVAIL; 650 #ifdef ENABLE_DEFAULT_SCOPE 651 if (addr->sin6_scope_id == 0) { /* not change if specified */ 652 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 653 } 654 #endif 655 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 656 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 657 return EADDRNOTAVAIL; 658 if (ia && 659 ((struct in6_ifaddr *)ia)->ia6_flags & 660 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 661 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 662 return (EADDRNOTAVAIL); 663 } 664 inp->in6p_laddr = addr->sin6_addr; 665 return 0; 666 } 667 668 static int 669 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 670 { 671 struct inpcb *inp = so->so_pcb; 672 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 673 struct in6_addr *in6a = NULL; 674 int error = 0; 675 #ifdef ENABLE_DEFAULT_SCOPE 676 struct sockaddr_in6 tmp; 677 #endif 678 679 if (nam->sa_len != sizeof(*addr)) 680 return EINVAL; 681 if (TAILQ_EMPTY(&ifnet)) 682 return EADDRNOTAVAIL; 683 if (addr->sin6_family != AF_INET6) 684 return EAFNOSUPPORT; 685 #ifdef ENABLE_DEFAULT_SCOPE 686 if (addr->sin6_scope_id == 0) { /* not change if specified */ 687 /* avoid overwrites */ 688 tmp = *addr; 689 addr = &tmp; 690 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 691 } 692 #endif 693 /* Source address selection. XXX: need pcblookup? */ 694 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 695 inp->in6p_moptions, &inp->in6p_route, 696 &inp->in6p_laddr, &error, NULL); 697 if (in6a == NULL) 698 return (error ? error : EADDRNOTAVAIL); 699 inp->in6p_laddr = *in6a; 700 inp->in6p_faddr = addr->sin6_addr; 701 soisconnected(so); 702 return 0; 703 } 704 705 static int 706 rip6_shutdown(struct socket *so) 707 { 708 socantsendmore(so); 709 return 0; 710 } 711 712 static int 713 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 714 struct mbuf *control, struct thread *td) 715 { 716 struct inpcb *inp = so->so_pcb; 717 struct sockaddr_in6 tmp; 718 struct sockaddr_in6 *dst; 719 720 /* always copy sockaddr to avoid overwrites */ 721 if (so->so_state & SS_ISCONNECTED) { 722 if (nam) { 723 m_freem(m); 724 return EISCONN; 725 } 726 /* XXX */ 727 bzero(&tmp, sizeof(tmp)); 728 tmp.sin6_family = AF_INET6; 729 tmp.sin6_len = sizeof(struct sockaddr_in6); 730 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 731 sizeof(struct in6_addr)); 732 dst = &tmp; 733 } else { 734 if (nam == NULL) { 735 m_freem(m); 736 return ENOTCONN; 737 } 738 tmp = *(struct sockaddr_in6 *)nam; 739 dst = &tmp; 740 } 741 #ifdef ENABLE_DEFAULT_SCOPE 742 if (dst->sin6_scope_id == 0) { /* not change if specified */ 743 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 744 } 745 #endif 746 return rip6_output(m, so, dst, control); 747 } 748 749 struct pr_usrreqs rip6_usrreqs = { 750 .pru_abort = rip6_abort, 751 .pru_accept = pru_accept_notsupp, 752 .pru_attach = rip6_attach, 753 .pru_bind = rip6_bind, 754 .pru_connect = rip6_connect, 755 .pru_connect2 = pru_connect2_notsupp, 756 .pru_control = in6_control, 757 .pru_detach = rip6_detach, 758 .pru_disconnect = rip6_disconnect, 759 .pru_listen = pru_listen_notsupp, 760 .pru_peeraddr = in6_setpeeraddr, 761 .pru_rcvd = pru_rcvd_notsupp, 762 .pru_rcvoob = pru_rcvoob_notsupp, 763 .pru_send = rip6_send, 764 .pru_sense = pru_sense_null, 765 .pru_shutdown = rip6_shutdown, 766 .pru_sockaddr = in6_setsockaddr, 767 .pru_sosend = sosend, 768 .pru_soreceive = soreceive 769 }; 770