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 #include <sys/thread2.h> 83 84 #include <net/if.h> 85 #include <net/route.h> 86 #include <net/if_types.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/in_systm.h> 91 #include <netinet/ip6.h> 92 #include <netinet6/ip6_var.h> 93 #include <netinet6/ip6_mroute.h> 94 #include <netinet/icmp6.h> 95 #include <netinet/in_pcb.h> 96 #include <netinet6/in6_pcb.h> 97 #include <netinet6/nd6.h> 98 #include <netinet6/ip6protosw.h> 99 #ifdef ENABLE_DEFAULT_SCOPE 100 #include <netinet6/scope6_var.h> 101 #endif 102 #include <netinet6/raw_ip6.h> 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #include <netinet6/ipsec6.h> 107 #endif /*IPSEC*/ 108 109 #ifdef FAST_IPSEC 110 #include <netproto/ipsec/ipsec.h> 111 #include <netproto/ipsec/ipsec6.h> 112 #endif /* FAST_IPSEC */ 113 114 #include <machine/stdarg.h> 115 116 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 117 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 118 119 /* 120 * Raw interface to IP6 protocol. 121 */ 122 123 extern struct inpcbinfo ripcbinfo; 124 extern u_long rip_sendspace; 125 extern u_long rip_recvspace; 126 127 struct rip6stat rip6stat; 128 129 /* 130 * Setup generic address and protocol structures 131 * for raw_input routine, then pass them along with 132 * mbuf chain. 133 */ 134 int 135 rip6_input(struct mbuf **mp, int *offp, int proto) 136 { 137 struct mbuf *m = *mp; 138 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 139 struct inpcb *in6p; 140 struct inpcb *last = 0; 141 struct mbuf *opts = NULL; 142 struct sockaddr_in6 rip6src; 143 144 rip6stat.rip6s_ipackets++; 145 146 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 147 /* XXX send icmp6 host/port unreach? */ 148 m_freem(m); 149 return IPPROTO_DONE; 150 } 151 152 init_sin6(&rip6src, m); /* general init */ 153 154 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 155 if (in6p->in6p_flags & INP_PLACEMARKER) 156 continue; 157 if (!(in6p->in6p_vflag & INP_IPV6)) 158 continue; 159 if (in6p->in6p_ip6_nxt && 160 in6p->in6p_ip6_nxt != proto) 161 continue; 162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 164 continue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 167 continue; 168 if (in6p->in6p_cksum != -1) { 169 rip6stat.rip6s_isum++; 170 if (in6_cksum(m, ip6->ip6_nxt, *offp, 171 m->m_pkthdr.len - *offp)) { 172 rip6stat.rip6s_badsum++; 173 continue; 174 } 175 } 176 if (last) { 177 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 178 179 #ifdef IPSEC 180 /* 181 * Check AH/ESP integrity. 182 */ 183 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 184 m_freem(n); 185 ipsec6stat.in_polvio++; 186 /* do not inject data into pcb */ 187 } else 188 #endif /*IPSEC*/ 189 #ifdef FAST_IPSEC 190 /* 191 * Check AH/ESP integrity. 192 */ 193 if (n && ipsec6_in_reject(n, last)) { 194 m_freem(n); 195 /* do not inject data into pcb */ 196 } else 197 #endif /*FAST_IPSEC*/ 198 if (n) { 199 if (last->in6p_flags & IN6P_CONTROLOPTS || 200 last->in6p_socket->so_options & SO_TIMESTAMP) 201 ip6_savecontrol(last, &opts, ip6, n); 202 /* strip intermediate headers */ 203 m_adj(n, *offp); 204 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 205 (struct sockaddr *)&rip6src, 206 n, opts) == 0) { 207 m_freem(n); 208 if (opts) 209 m_freem(opts); 210 rip6stat.rip6s_fullsock++; 211 } else 212 sorwakeup(last->in6p_socket); 213 opts = NULL; 214 } 215 } 216 last = in6p; 217 } 218 #ifdef IPSEC 219 /* 220 * Check AH/ESP integrity. 221 */ 222 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 223 m_freem(m); 224 ipsec6stat.in_polvio++; 225 ip6stat.ip6s_delivered--; 226 /* do not inject data into pcb */ 227 } else 228 #endif /*IPSEC*/ 229 #ifdef FAST_IPSEC 230 /* 231 * Check AH/ESP integrity. 232 */ 233 if (last && ipsec6_in_reject(m, last)) { 234 m_freem(m); 235 ip6stat.ip6s_delivered--; 236 /* do not inject data into pcb */ 237 } else 238 #endif /*FAST_IPSEC*/ 239 if (last) { 240 if (last->in6p_flags & IN6P_CONTROLOPTS || 241 last->in6p_socket->so_options & SO_TIMESTAMP) 242 ip6_savecontrol(last, &opts, ip6, m); 243 /* strip intermediate headers */ 244 m_adj(m, *offp); 245 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 246 (struct sockaddr *)&rip6src, m, opts) == 0) { 247 m_freem(m); 248 if (opts) 249 m_freem(opts); 250 rip6stat.rip6s_fullsock++; 251 } else 252 sorwakeup(last->in6p_socket); 253 } else { 254 rip6stat.rip6s_nosock++; 255 if (m->m_flags & M_MCAST) 256 rip6stat.rip6s_nosockmcast++; 257 if (proto == IPPROTO_NONE) 258 m_freem(m); 259 else { 260 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 261 icmp6_error(m, ICMP6_PARAM_PROB, 262 ICMP6_PARAMPROB_NEXTHEADER, 263 prvnxtp - mtod(m, char *)); 264 } 265 ip6stat.ip6s_delivered--; 266 } 267 return IPPROTO_DONE; 268 } 269 270 void 271 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 272 { 273 struct ip6_hdr *ip6; 274 struct mbuf *m; 275 int off = 0; 276 struct ip6ctlparam *ip6cp = NULL; 277 const struct sockaddr_in6 *sa6_src = NULL; 278 void (*notify) (struct inpcb *, int) = in6_rtchange; 279 280 if (sa->sa_family != AF_INET6 || 281 sa->sa_len != sizeof(struct sockaddr_in6)) 282 return; 283 284 if ((unsigned)cmd >= PRC_NCMDS) 285 return; 286 if (PRC_IS_REDIRECT(cmd)) 287 notify = in6_rtchange, d = NULL; 288 else if (cmd == PRC_HOSTDEAD) 289 d = NULL; 290 else if (inet6ctlerrmap[cmd] == 0) 291 return; 292 293 /* if the parameter is from icmp6, decode it. */ 294 if (d != NULL) { 295 ip6cp = (struct ip6ctlparam *)d; 296 m = ip6cp->ip6c_m; 297 ip6 = ip6cp->ip6c_ip6; 298 off = ip6cp->ip6c_off; 299 sa6_src = ip6cp->ip6c_src; 300 } else { 301 m = NULL; 302 ip6 = NULL; 303 sa6_src = &sa6_any; 304 } 305 306 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 307 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 308 } 309 310 /* 311 * Generate IPv6 header and pass packet to ip6_output. 312 * Tack on options user may have setup with control call. 313 */ 314 int 315 rip6_output(struct mbuf *m, struct socket *so, ...) 316 { 317 struct sockaddr_in6 *dstsock; 318 struct mbuf *control; 319 struct in6_addr *dst; 320 struct ip6_hdr *ip6; 321 struct inpcb *in6p; 322 u_int plen = m->m_pkthdr.len; 323 int error = 0; 324 struct ip6_pktopts opt, *optp = 0; 325 struct ifnet *oifp = NULL; 326 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 327 int priv = 0; 328 __va_list ap; 329 330 __va_start(ap, so); 331 dstsock = __va_arg(ap, struct sockaddr_in6 *); 332 control = __va_arg(ap, struct mbuf *); 333 __va_end(ap); 334 335 in6p = so->so_pcb; 336 337 priv = 0; 338 if (so->so_cred->cr_uid == 0) 339 priv = 1; 340 dst = &dstsock->sin6_addr; 341 if (control) { 342 if ((error = ip6_setpktoptions(control, &opt, 343 in6p->in6p_outputopts, 344 so->so_proto->pr_protocol, priv)) != 0) 345 goto bad; 346 optp = &opt; 347 } else 348 optp = in6p->in6p_outputopts; 349 350 /* 351 * For an ICMPv6 packet, we should know its type and code 352 * to update statistics. 353 */ 354 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 355 struct icmp6_hdr *icmp6; 356 if (m->m_len < sizeof(struct icmp6_hdr) && 357 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 358 error = ENOBUFS; 359 goto bad; 360 } 361 icmp6 = mtod(m, struct icmp6_hdr *); 362 type = icmp6->icmp6_type; 363 code = icmp6->icmp6_code; 364 } 365 366 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 367 ip6 = mtod(m, struct ip6_hdr *); 368 369 /* 370 * Next header might not be ICMP6 but use its pseudo header anyway. 371 */ 372 ip6->ip6_dst = *dst; 373 374 /* 375 * If the scope of the destination is link-local, embed the interface 376 * index in the address. 377 * 378 * XXX advanced-api value overrides sin6_scope_id 379 */ 380 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 381 struct in6_pktinfo *pi; 382 383 /* 384 * XXX Boundary check is assumed to be already done in 385 * ip6_setpktoptions(). 386 */ 387 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 388 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 389 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 390 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 391 in6p->in6p_moptions && 392 in6p->in6p_moptions->im6o_multicast_ifp) { 393 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 394 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 395 } else if (dstsock->sin6_scope_id) { 396 /* boundary check */ 397 if (dstsock->sin6_scope_id < 0 398 || if_index < dstsock->sin6_scope_id) { 399 error = ENXIO; /* XXX EINVAL? */ 400 goto bad; 401 } 402 ip6->ip6_dst.s6_addr16[1] 403 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 404 } 405 } 406 407 /* 408 * Source address selection. 409 */ 410 { 411 struct in6_addr *in6a; 412 413 if ((in6a = in6_selectsrc(dstsock, optp, 414 in6p->in6p_moptions, 415 &in6p->in6p_route, 416 &in6p->in6p_laddr, 417 &error, NULL)) == NULL) { 418 if (error == 0) 419 error = EADDRNOTAVAIL; 420 goto bad; 421 } 422 ip6->ip6_src = *in6a; 423 if (in6p->in6p_route.ro_rt) 424 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 425 } 426 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 427 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 428 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 429 (IPV6_VERSION & IPV6_VERSION_MASK); 430 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 431 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 432 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 433 434 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 435 in6p->in6p_cksum != -1) { 436 struct mbuf *n; 437 int off; 438 u_int16_t *p; 439 440 /* compute checksum */ 441 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 442 off = offsetof(struct icmp6_hdr, icmp6_cksum); 443 else 444 off = in6p->in6p_cksum; 445 if (plen < off + 1) { 446 error = EINVAL; 447 goto bad; 448 } 449 off += sizeof(struct ip6_hdr); 450 451 n = m; 452 while (n && n->m_len <= off) { 453 off -= n->m_len; 454 n = n->m_next; 455 } 456 if (!n) 457 goto bad; 458 p = (u_int16_t *)(mtod(n, caddr_t) + off); 459 *p = 0; 460 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 461 } 462 463 error = ip6_output(m, optp, &in6p->in6p_route, 0, 464 in6p->in6p_moptions, &oifp, in6p); 465 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 466 if (oifp) 467 icmp6_ifoutstat_inc(oifp, type, code); 468 icmp6stat.icp6s_outhist[type]++; 469 } else 470 rip6stat.rip6s_opackets++; 471 472 goto freectl; 473 474 bad: 475 if (m) 476 m_freem(m); 477 478 freectl: 479 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 480 RTFREE(optp->ip6po_route.ro_rt); 481 if (control) { 482 if (optp == &opt) 483 ip6_clearpktopts(optp, -1); 484 m_freem(control); 485 } 486 return (error); 487 } 488 489 /* 490 * Raw IPv6 socket option processing. 491 */ 492 int 493 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 494 { 495 int error; 496 497 if (sopt->sopt_level == IPPROTO_ICMPV6) 498 /* 499 * XXX: is it better to call icmp6_ctloutput() directly 500 * from protosw? 501 */ 502 return (icmp6_ctloutput(so, sopt)); 503 else if (sopt->sopt_level != IPPROTO_IPV6) 504 return (EINVAL); 505 506 error = 0; 507 508 switch (sopt->sopt_dir) { 509 case SOPT_GET: 510 switch (sopt->sopt_name) { 511 case MRT6_INIT: 512 case MRT6_DONE: 513 case MRT6_ADD_MIF: 514 case MRT6_DEL_MIF: 515 case MRT6_ADD_MFC: 516 case MRT6_DEL_MFC: 517 case MRT6_PIM: 518 error = ip6_mrouter_get(so, sopt); 519 break; 520 case IPV6_CHECKSUM: 521 error = ip6_raw_ctloutput(so, sopt); 522 break; 523 default: 524 error = ip6_ctloutput(so, sopt); 525 break; 526 } 527 break; 528 529 case SOPT_SET: 530 switch (sopt->sopt_name) { 531 case MRT6_INIT: 532 case MRT6_DONE: 533 case MRT6_ADD_MIF: 534 case MRT6_DEL_MIF: 535 case MRT6_ADD_MFC: 536 case MRT6_DEL_MFC: 537 case MRT6_PIM: 538 error = ip6_mrouter_set(so, sopt); 539 break; 540 case IPV6_CHECKSUM: 541 error = ip6_raw_ctloutput(so, sopt); 542 break; 543 default: 544 error = ip6_ctloutput(so, sopt); 545 break; 546 } 547 break; 548 } 549 550 return (error); 551 } 552 553 static int 554 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 555 { 556 struct inpcb *inp; 557 int error; 558 559 inp = so->so_pcb; 560 if (inp) 561 panic("rip6_attach"); 562 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY); 563 if (error) 564 return error; 565 566 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 567 if (error) 568 return error; 569 crit_enter(); 570 error = in_pcballoc(so, &ripcbinfo); 571 crit_exit(); 572 if (error) 573 return error; 574 inp = (struct inpcb *)so->so_pcb; 575 inp->inp_vflag |= INP_IPV6; 576 inp->in6p_ip6_nxt = (long)proto; 577 inp->in6p_hops = -1; /* use kernel default */ 578 inp->in6p_cksum = -1; 579 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 580 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 581 if (inp->in6p_icmp6filt != NULL) 582 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 583 return 0; 584 } 585 586 static int 587 rip6_detach(struct socket *so) 588 { 589 struct inpcb *inp; 590 591 inp = so->so_pcb; 592 if (inp == NULL) 593 panic("rip6_detach"); 594 /* xxx: RSVP */ 595 if (so == ip6_mrouter) 596 ip6_mrouter_done(); 597 if (inp->in6p_icmp6filt) { 598 FREE(inp->in6p_icmp6filt, M_PCB); 599 inp->in6p_icmp6filt = NULL; 600 } 601 in6_pcbdetach(inp); 602 return 0; 603 } 604 605 static int 606 rip6_abort(struct socket *so) 607 { 608 soisdisconnected(so); 609 return rip6_detach(so); 610 } 611 612 static int 613 rip6_disconnect(struct socket *so) 614 { 615 struct inpcb *inp = so->so_pcb; 616 617 if (!(so->so_state & SS_ISCONNECTED)) 618 return ENOTCONN; 619 inp->in6p_faddr = kin6addr_any; 620 return rip6_abort(so); 621 } 622 623 static int 624 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 625 { 626 struct inpcb *inp = so->so_pcb; 627 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 628 struct ifaddr *ia = NULL; 629 630 if (nam->sa_len != sizeof(*addr)) 631 return EINVAL; 632 633 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 634 return EADDRNOTAVAIL; 635 #ifdef ENABLE_DEFAULT_SCOPE 636 if (addr->sin6_scope_id == 0) { /* not change if specified */ 637 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 638 } 639 #endif 640 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 641 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 642 return EADDRNOTAVAIL; 643 if (ia && 644 ((struct in6_ifaddr *)ia)->ia6_flags & 645 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 646 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 647 return (EADDRNOTAVAIL); 648 } 649 inp->in6p_laddr = addr->sin6_addr; 650 return 0; 651 } 652 653 static int 654 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 655 { 656 struct inpcb *inp = so->so_pcb; 657 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 658 struct in6_addr *in6a = NULL; 659 int error = 0; 660 #ifdef ENABLE_DEFAULT_SCOPE 661 struct sockaddr_in6 tmp; 662 #endif 663 664 if (nam->sa_len != sizeof(*addr)) 665 return EINVAL; 666 if (TAILQ_EMPTY(&ifnet)) 667 return EADDRNOTAVAIL; 668 if (addr->sin6_family != AF_INET6) 669 return EAFNOSUPPORT; 670 #ifdef ENABLE_DEFAULT_SCOPE 671 if (addr->sin6_scope_id == 0) { /* not change if specified */ 672 /* avoid overwrites */ 673 tmp = *addr; 674 addr = &tmp; 675 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 676 } 677 #endif 678 /* Source address selection. XXX: need pcblookup? */ 679 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 680 inp->in6p_moptions, &inp->in6p_route, 681 &inp->in6p_laddr, &error, NULL); 682 if (in6a == NULL) 683 return (error ? error : EADDRNOTAVAIL); 684 inp->in6p_laddr = *in6a; 685 inp->in6p_faddr = addr->sin6_addr; 686 soisconnected(so); 687 return 0; 688 } 689 690 static int 691 rip6_shutdown(struct socket *so) 692 { 693 socantsendmore(so); 694 return 0; 695 } 696 697 static int 698 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 699 struct mbuf *control, struct thread *td) 700 { 701 struct inpcb *inp = so->so_pcb; 702 struct sockaddr_in6 tmp; 703 struct sockaddr_in6 *dst; 704 705 /* always copy sockaddr to avoid overwrites */ 706 if (so->so_state & SS_ISCONNECTED) { 707 if (nam) { 708 m_freem(m); 709 return EISCONN; 710 } 711 /* XXX */ 712 bzero(&tmp, sizeof(tmp)); 713 tmp.sin6_family = AF_INET6; 714 tmp.sin6_len = sizeof(struct sockaddr_in6); 715 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 716 sizeof(struct in6_addr)); 717 dst = &tmp; 718 } else { 719 if (nam == NULL) { 720 m_freem(m); 721 return ENOTCONN; 722 } 723 tmp = *(struct sockaddr_in6 *)nam; 724 dst = &tmp; 725 } 726 #ifdef ENABLE_DEFAULT_SCOPE 727 if (dst->sin6_scope_id == 0) { /* not change if specified */ 728 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 729 } 730 #endif 731 return rip6_output(m, so, dst, control); 732 } 733 734 struct pr_usrreqs rip6_usrreqs = { 735 .pru_abort = rip6_abort, 736 .pru_accept = pru_accept_notsupp, 737 .pru_attach = rip6_attach, 738 .pru_bind = rip6_bind, 739 .pru_connect = rip6_connect, 740 .pru_connect2 = pru_connect2_notsupp, 741 .pru_control = in6_control, 742 .pru_detach = rip6_detach, 743 .pru_disconnect = rip6_disconnect, 744 .pru_listen = pru_listen_notsupp, 745 .pru_peeraddr = in6_setpeeraddr, 746 .pru_rcvd = pru_rcvd_notsupp, 747 .pru_rcvoob = pru_rcvoob_notsupp, 748 .pru_send = rip6_send, 749 .pru_sense = pru_sense_null, 750 .pru_shutdown = rip6_shutdown, 751 .pru_sockaddr = in6_setsockaddr, 752 .pru_sosend = sosend, 753 .pru_soreceive = soreceive, 754 .pru_sopoll = sopoll 755 }; 756