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 1.25 2007/04/22 01:13:14 dillon 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/mbuf.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/socketvar.h> 78 #include <sys/errno.h> 79 #include <sys/systm.h> 80 #include <sys/thread2.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/if_types.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 #ifdef ENABLE_DEFAULT_SCOPE 98 #include <netinet6/scope6_var.h> 99 #endif 100 #include <netinet6/raw_ip6.h> 101 102 #ifdef IPSEC 103 #include <netinet6/ipsec.h> 104 #include <netinet6/ipsec6.h> 105 #endif /*IPSEC*/ 106 107 #ifdef FAST_IPSEC 108 #include <netproto/ipsec/ipsec.h> 109 #include <netproto/ipsec/ipsec6.h> 110 #endif /* FAST_IPSEC */ 111 112 #include <machine/stdarg.h> 113 114 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 115 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 116 117 /* 118 * Raw interface to IP6 protocol. 119 */ 120 121 extern struct inpcbinfo ripcbinfo; 122 extern u_long rip_sendspace; 123 extern u_long rip_recvspace; 124 125 struct rip6stat rip6stat; 126 127 /* 128 * Setup generic address and protocol structures 129 * for raw_input routine, then pass them along with 130 * mbuf chain. 131 */ 132 int 133 rip6_input(struct mbuf **mp, int *offp, int proto) 134 { 135 struct mbuf *m = *mp; 136 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 137 struct inpcb *in6p; 138 struct inpcb *last = 0; 139 struct mbuf *opts = NULL; 140 struct sockaddr_in6 rip6src; 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(&rip6src, m); /* general init */ 151 152 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 153 if (in6p->in6p_flags & INP_PLACEMARKER) 154 continue; 155 if (!(in6p->in6p_vflag & INP_IPV6)) 156 continue; 157 if (in6p->in6p_ip6_nxt && 158 in6p->in6p_ip6_nxt != proto) 159 continue; 160 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 161 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 162 continue; 163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 165 continue; 166 if (in6p->in6p_cksum != -1) { 167 rip6stat.rip6s_isum++; 168 if (in6_cksum(m, ip6->ip6_nxt, *offp, 169 m->m_pkthdr.len - *offp)) { 170 rip6stat.rip6s_badsum++; 171 continue; 172 } 173 } 174 if (last) { 175 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 176 177 #ifdef IPSEC 178 /* 179 * Check AH/ESP integrity. 180 */ 181 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 182 m_freem(n); 183 ipsec6stat.in_polvio++; 184 /* do not inject data into pcb */ 185 } else 186 #endif /*IPSEC*/ 187 #ifdef FAST_IPSEC 188 /* 189 * Check AH/ESP integrity. 190 */ 191 if (n && ipsec6_in_reject(n, last)) { 192 m_freem(n); 193 /* do not inject data into pcb */ 194 } else 195 #endif /*FAST_IPSEC*/ 196 if (n) { 197 if (last->in6p_flags & IN6P_CONTROLOPTS || 198 last->in6p_socket->so_options & SO_TIMESTAMP) 199 ip6_savecontrol(last, &opts, ip6, n); 200 /* strip intermediate headers */ 201 m_adj(n, *offp); 202 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 203 (struct sockaddr *)&rip6src, 204 n, opts) == 0) { 205 m_freem(n); 206 if (opts) 207 m_freem(opts); 208 rip6stat.rip6s_fullsock++; 209 } else 210 sorwakeup(last->in6p_socket); 211 opts = NULL; 212 } 213 } 214 last = in6p; 215 } 216 #ifdef IPSEC 217 /* 218 * Check AH/ESP integrity. 219 */ 220 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 221 m_freem(m); 222 ipsec6stat.in_polvio++; 223 ip6stat.ip6s_delivered--; 224 /* do not inject data into pcb */ 225 } else 226 #endif /*IPSEC*/ 227 #ifdef FAST_IPSEC 228 /* 229 * Check AH/ESP integrity. 230 */ 231 if (last && ipsec6_in_reject(m, last)) { 232 m_freem(m); 233 ip6stat.ip6s_delivered--; 234 /* do not inject data into pcb */ 235 } else 236 #endif /*FAST_IPSEC*/ 237 if (last) { 238 if (last->in6p_flags & IN6P_CONTROLOPTS || 239 last->in6p_socket->so_options & SO_TIMESTAMP) 240 ip6_savecontrol(last, &opts, ip6, m); 241 /* strip intermediate headers */ 242 m_adj(m, *offp); 243 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 244 (struct sockaddr *)&rip6src, m, opts) == 0) { 245 m_freem(m); 246 if (opts) 247 m_freem(opts); 248 rip6stat.rip6s_fullsock++; 249 } else 250 sorwakeup(last->in6p_socket); 251 } else { 252 rip6stat.rip6s_nosock++; 253 if (m->m_flags & M_MCAST) 254 rip6stat.rip6s_nosockmcast++; 255 if (proto == IPPROTO_NONE) 256 m_freem(m); 257 else { 258 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 259 icmp6_error(m, ICMP6_PARAM_PROB, 260 ICMP6_PARAMPROB_NEXTHEADER, 261 prvnxtp - mtod(m, char *)); 262 } 263 ip6stat.ip6s_delivered--; 264 } 265 return IPPROTO_DONE; 266 } 267 268 void 269 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 270 { 271 struct ip6_hdr *ip6; 272 struct mbuf *m; 273 int off = 0; 274 struct ip6ctlparam *ip6cp = NULL; 275 const struct sockaddr_in6 *sa6_src = NULL; 276 void (*notify) (struct inpcb *, int) = in6_rtchange; 277 278 if (sa->sa_family != AF_INET6 || 279 sa->sa_len != sizeof(struct sockaddr_in6)) 280 return; 281 282 if ((unsigned)cmd >= PRC_NCMDS) 283 return; 284 if (PRC_IS_REDIRECT(cmd)) 285 notify = in6_rtchange, d = NULL; 286 else if (cmd == PRC_HOSTDEAD) 287 d = NULL; 288 else if (inet6ctlerrmap[cmd] == 0) 289 return; 290 291 /* if the parameter is from icmp6, decode it. */ 292 if (d != NULL) { 293 ip6cp = (struct ip6ctlparam *)d; 294 m = ip6cp->ip6c_m; 295 ip6 = ip6cp->ip6c_ip6; 296 off = ip6cp->ip6c_off; 297 sa6_src = ip6cp->ip6c_src; 298 } else { 299 m = NULL; 300 ip6 = NULL; 301 sa6_src = &sa6_any; 302 } 303 304 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 305 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 306 } 307 308 /* 309 * Generate IPv6 header and pass packet to ip6_output. 310 * Tack on options user may have setup with control call. 311 */ 312 int 313 rip6_output(struct mbuf *m, struct socket *so, ...) 314 { 315 struct sockaddr_in6 *dstsock; 316 struct mbuf *control; 317 struct in6_addr *dst; 318 struct ip6_hdr *ip6; 319 struct inpcb *in6p; 320 u_int plen = m->m_pkthdr.len; 321 int error = 0; 322 struct ip6_pktopts opt, *optp = 0; 323 struct ifnet *oifp = NULL; 324 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 325 int priv = 0; 326 __va_list ap; 327 328 __va_start(ap, so); 329 dstsock = __va_arg(ap, struct sockaddr_in6 *); 330 control = __va_arg(ap, struct mbuf *); 331 __va_end(ap); 332 333 in6p = so->so_pcb; 334 335 priv = 0; 336 if (so->so_cred->cr_uid == 0) 337 priv = 1; 338 dst = &dstsock->sin6_addr; 339 if (control) { 340 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 341 goto bad; 342 optp = &opt; 343 } else 344 optp = in6p->in6p_outputopts; 345 346 /* 347 * For an ICMPv6 packet, we should know its type and code 348 * to update statistics. 349 */ 350 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 351 struct icmp6_hdr *icmp6; 352 if (m->m_len < sizeof(struct icmp6_hdr) && 353 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 354 error = ENOBUFS; 355 goto bad; 356 } 357 icmp6 = mtod(m, struct icmp6_hdr *); 358 type = icmp6->icmp6_type; 359 code = icmp6->icmp6_code; 360 } 361 362 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 363 ip6 = mtod(m, struct ip6_hdr *); 364 365 /* 366 * Next header might not be ICMP6 but use its pseudo header anyway. 367 */ 368 ip6->ip6_dst = *dst; 369 370 /* 371 * If the scope of the destination is link-local, embed the interface 372 * index in the address. 373 * 374 * XXX advanced-api value overrides sin6_scope_id 375 */ 376 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 377 struct in6_pktinfo *pi; 378 379 /* 380 * XXX Boundary check is assumed to be already done in 381 * ip6_setpktoptions(). 382 */ 383 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 384 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 385 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 386 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 387 in6p->in6p_moptions && 388 in6p->in6p_moptions->im6o_multicast_ifp) { 389 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 390 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 391 } else if (dstsock->sin6_scope_id) { 392 /* boundary check */ 393 if (dstsock->sin6_scope_id < 0 394 || if_index < dstsock->sin6_scope_id) { 395 error = ENXIO; /* XXX EINVAL? */ 396 goto bad; 397 } 398 ip6->ip6_dst.s6_addr16[1] 399 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 400 } 401 } 402 403 /* 404 * Source address selection. 405 */ 406 { 407 struct in6_addr *in6a; 408 409 if ((in6a = in6_selectsrc(dstsock, optp, 410 in6p->in6p_moptions, 411 &in6p->in6p_route, 412 &in6p->in6p_laddr, 413 &error, NULL)) == NULL) { 414 if (error == 0) 415 error = EADDRNOTAVAIL; 416 goto bad; 417 } 418 ip6->ip6_src = *in6a; 419 if (in6p->in6p_route.ro_rt) 420 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 421 } 422 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 423 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 424 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 425 (IPV6_VERSION & IPV6_VERSION_MASK); 426 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 427 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 428 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 429 430 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 431 in6p->in6p_cksum != -1) { 432 struct mbuf *n; 433 int off; 434 u_int16_t *p; 435 436 /* compute checksum */ 437 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 438 off = offsetof(struct icmp6_hdr, icmp6_cksum); 439 else 440 off = in6p->in6p_cksum; 441 if (plen < off + 1) { 442 error = EINVAL; 443 goto bad; 444 } 445 off += sizeof(struct ip6_hdr); 446 447 n = m; 448 while (n && n->m_len <= off) { 449 off -= n->m_len; 450 n = n->m_next; 451 } 452 if (!n) 453 goto bad; 454 p = (u_int16_t *)(mtod(n, caddr_t) + off); 455 *p = 0; 456 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 457 } 458 459 error = ip6_output(m, optp, &in6p->in6p_route, 0, 460 in6p->in6p_moptions, &oifp, in6p); 461 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 462 if (oifp) 463 icmp6_ifoutstat_inc(oifp, type, code); 464 icmp6stat.icp6s_outhist[type]++; 465 } else 466 rip6stat.rip6s_opackets++; 467 468 goto freectl; 469 470 bad: 471 if (m) 472 m_freem(m); 473 474 freectl: 475 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 476 RTFREE(optp->ip6po_route.ro_rt); 477 if (control) { 478 if (optp == &opt) 479 ip6_clearpktopts(optp, 0, -1); 480 m_freem(control); 481 } 482 return (error); 483 } 484 485 /* 486 * Raw IPv6 socket option processing. 487 */ 488 int 489 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 490 { 491 int error; 492 493 if (sopt->sopt_level == IPPROTO_ICMPV6) 494 /* 495 * XXX: is it better to call icmp6_ctloutput() directly 496 * from protosw? 497 */ 498 return (icmp6_ctloutput(so, sopt)); 499 else if (sopt->sopt_level != IPPROTO_IPV6) 500 return (EINVAL); 501 502 error = 0; 503 504 switch (sopt->sopt_dir) { 505 case SOPT_GET: 506 switch (sopt->sopt_name) { 507 case MRT6_INIT: 508 case MRT6_DONE: 509 case MRT6_ADD_MIF: 510 case MRT6_DEL_MIF: 511 case MRT6_ADD_MFC: 512 case MRT6_DEL_MFC: 513 case MRT6_PIM: 514 error = ip6_mrouter_get(so, sopt); 515 break; 516 default: 517 error = ip6_ctloutput(so, sopt); 518 break; 519 } 520 break; 521 522 case SOPT_SET: 523 switch (sopt->sopt_name) { 524 case MRT6_INIT: 525 case MRT6_DONE: 526 case MRT6_ADD_MIF: 527 case MRT6_DEL_MIF: 528 case MRT6_ADD_MFC: 529 case MRT6_DEL_MFC: 530 case MRT6_PIM: 531 error = ip6_mrouter_set(so, sopt); 532 break; 533 default: 534 error = ip6_ctloutput(so, sopt); 535 break; 536 } 537 break; 538 } 539 540 return (error); 541 } 542 543 static int 544 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 545 { 546 struct inpcb *inp; 547 int error; 548 549 inp = so->so_pcb; 550 if (inp) 551 panic("rip6_attach"); 552 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 553 return error; 554 555 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 556 if (error) 557 return error; 558 crit_enter(); 559 error = in_pcballoc(so, &ripcbinfo); 560 crit_exit(); 561 if (error) 562 return error; 563 inp = (struct inpcb *)so->so_pcb; 564 inp->inp_vflag |= INP_IPV6; 565 inp->in6p_ip6_nxt = (long)proto; 566 inp->in6p_hops = -1; /* use kernel default */ 567 inp->in6p_cksum = -1; 568 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 569 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 570 if (inp->in6p_icmp6filt != NULL) 571 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 572 return 0; 573 } 574 575 static int 576 rip6_detach(struct socket *so) 577 { 578 struct inpcb *inp; 579 580 inp = so->so_pcb; 581 if (inp == NULL) 582 panic("rip6_detach"); 583 /* xxx: RSVP */ 584 if (so == ip6_mrouter) 585 ip6_mrouter_done(); 586 if (inp->in6p_icmp6filt) { 587 FREE(inp->in6p_icmp6filt, M_PCB); 588 inp->in6p_icmp6filt = NULL; 589 } 590 in6_pcbdetach(inp); 591 return 0; 592 } 593 594 static int 595 rip6_abort(struct socket *so) 596 { 597 soisdisconnected(so); 598 return rip6_detach(so); 599 } 600 601 static int 602 rip6_disconnect(struct socket *so) 603 { 604 struct inpcb *inp = so->so_pcb; 605 606 if (!(so->so_state & SS_ISCONNECTED)) 607 return ENOTCONN; 608 inp->in6p_faddr = kin6addr_any; 609 return rip6_abort(so); 610 } 611 612 static int 613 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 614 { 615 struct inpcb *inp = so->so_pcb; 616 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 617 struct ifaddr *ia = NULL; 618 619 if (nam->sa_len != sizeof(*addr)) 620 return EINVAL; 621 622 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 623 return EADDRNOTAVAIL; 624 #ifdef ENABLE_DEFAULT_SCOPE 625 if (addr->sin6_scope_id == 0) { /* not change if specified */ 626 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 627 } 628 #endif 629 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 630 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 631 return EADDRNOTAVAIL; 632 if (ia && 633 ((struct in6_ifaddr *)ia)->ia6_flags & 634 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 635 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 636 return (EADDRNOTAVAIL); 637 } 638 inp->in6p_laddr = addr->sin6_addr; 639 return 0; 640 } 641 642 static int 643 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 644 { 645 struct inpcb *inp = so->so_pcb; 646 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 647 struct in6_addr *in6a = NULL; 648 int error = 0; 649 #ifdef ENABLE_DEFAULT_SCOPE 650 struct sockaddr_in6 tmp; 651 #endif 652 653 if (nam->sa_len != sizeof(*addr)) 654 return EINVAL; 655 if (TAILQ_EMPTY(&ifnet)) 656 return EADDRNOTAVAIL; 657 if (addr->sin6_family != AF_INET6) 658 return EAFNOSUPPORT; 659 #ifdef ENABLE_DEFAULT_SCOPE 660 if (addr->sin6_scope_id == 0) { /* not change if specified */ 661 /* avoid overwrites */ 662 tmp = *addr; 663 addr = &tmp; 664 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 665 } 666 #endif 667 /* Source address selection. XXX: need pcblookup? */ 668 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 669 inp->in6p_moptions, &inp->in6p_route, 670 &inp->in6p_laddr, &error, NULL); 671 if (in6a == NULL) 672 return (error ? error : EADDRNOTAVAIL); 673 inp->in6p_laddr = *in6a; 674 inp->in6p_faddr = addr->sin6_addr; 675 soisconnected(so); 676 return 0; 677 } 678 679 static int 680 rip6_shutdown(struct socket *so) 681 { 682 socantsendmore(so); 683 return 0; 684 } 685 686 static int 687 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 688 struct mbuf *control, struct thread *td) 689 { 690 struct inpcb *inp = so->so_pcb; 691 struct sockaddr_in6 tmp; 692 struct sockaddr_in6 *dst; 693 694 /* always copy sockaddr to avoid overwrites */ 695 if (so->so_state & SS_ISCONNECTED) { 696 if (nam) { 697 m_freem(m); 698 return EISCONN; 699 } 700 /* XXX */ 701 bzero(&tmp, sizeof(tmp)); 702 tmp.sin6_family = AF_INET6; 703 tmp.sin6_len = sizeof(struct sockaddr_in6); 704 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 705 sizeof(struct in6_addr)); 706 dst = &tmp; 707 } else { 708 if (nam == NULL) { 709 m_freem(m); 710 return ENOTCONN; 711 } 712 tmp = *(struct sockaddr_in6 *)nam; 713 dst = &tmp; 714 } 715 #ifdef ENABLE_DEFAULT_SCOPE 716 if (dst->sin6_scope_id == 0) { /* not change if specified */ 717 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 718 } 719 #endif 720 return rip6_output(m, so, dst, control); 721 } 722 723 struct pr_usrreqs rip6_usrreqs = { 724 .pru_abort = rip6_abort, 725 .pru_accept = pru_accept_notsupp, 726 .pru_attach = rip6_attach, 727 .pru_bind = rip6_bind, 728 .pru_connect = rip6_connect, 729 .pru_connect2 = pru_connect2_notsupp, 730 .pru_control = in6_control, 731 .pru_detach = rip6_detach, 732 .pru_disconnect = rip6_disconnect, 733 .pru_listen = pru_listen_notsupp, 734 .pru_peeraddr = in6_setpeeraddr, 735 .pru_rcvd = pru_rcvd_notsupp, 736 .pru_rcvoob = pru_rcvoob_notsupp, 737 .pru_send = rip6_send, 738 .pru_sense = pru_sense_null, 739 .pru_shutdown = rip6_shutdown, 740 .pru_sockaddr = in6_setsockaddr, 741 .pru_sosend = sosend, 742 .pru_soreceive = soreceive, 743 .pru_sopoll = sopoll 744 }; 745