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 1.8 2003/08/23 11:02:46 rob 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 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/if_types.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/ip6_mroute.h> 91 #include <netinet/icmp6.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/nd6.h> 95 #include <netinet6/ip6protosw.h> 96 #ifdef ENABLE_DEFAULT_SCOPE 97 #include <netinet6/scope6_var.h> 98 #endif 99 #include <netinet6/raw_ip6.h> 100 101 #ifdef IPSEC 102 #include <netinet6/ipsec.h> 103 #include <netinet6/ipsec6.h> 104 #endif /*IPSEC*/ 105 106 #ifdef FAST_IPSEC 107 #include "ipsec.h" 108 #include "ipsec6.h" 109 #endif /* FAST_IPSEC */ 110 111 #include <machine/stdarg.h> 112 113 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 114 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 115 116 /* 117 * Raw interface to IP6 protocol. 118 */ 119 120 extern struct inpcbhead ripcb; 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(mp, offp, proto) 134 struct mbuf **mp; 135 int *offp, 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, &ripcb, inp_list) { 155 if ((in6p->in6p_vflag & INP_IPV6) == 0) 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 (sbappendaddr(&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 (sbappendaddr(&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(cmd, sa, d) 270 int cmd; 271 struct sockaddr *sa; 272 void *d; 273 { 274 struct ip6_hdr *ip6; 275 struct mbuf *m; 276 int off = 0; 277 struct ip6ctlparam *ip6cp = NULL; 278 const struct sockaddr_in6 *sa6_src = NULL; 279 void (*notify) (struct inpcb *, int) = in6_rtchange; 280 281 if (sa->sa_family != AF_INET6 || 282 sa->sa_len != sizeof(struct sockaddr_in6)) 283 return; 284 285 if ((unsigned)cmd >= PRC_NCMDS) 286 return; 287 if (PRC_IS_REDIRECT(cmd)) 288 notify = in6_rtchange, d = NULL; 289 else if (cmd == PRC_HOSTDEAD) 290 d = NULL; 291 else if (inet6ctlerrmap[cmd] == 0) 292 return; 293 294 /* if the parameter is from icmp6, decode it. */ 295 if (d != NULL) { 296 ip6cp = (struct ip6ctlparam *)d; 297 m = ip6cp->ip6c_m; 298 ip6 = ip6cp->ip6c_ip6; 299 off = ip6cp->ip6c_off; 300 sa6_src = ip6cp->ip6c_src; 301 } else { 302 m = NULL; 303 ip6 = NULL; 304 sa6_src = &sa6_any; 305 } 306 307 (void) in6_pcbnotify(&ripcb, sa, 0, (const struct sockaddr *)sa6_src, 308 0, cmd, notify); 309 } 310 311 /* 312 * Generate IPv6 header and pass packet to ip6_output. 313 * Tack on options user may have setup with control call. 314 */ 315 int 316 #if __STDC__ 317 rip6_output(struct mbuf *m, ...) 318 #else 319 rip6_output(m, va_alist) 320 struct mbuf *m; 321 va_dcl 322 #endif 323 { 324 struct socket *so; 325 struct sockaddr_in6 *dstsock; 326 struct mbuf *control; 327 struct in6_addr *dst; 328 struct ip6_hdr *ip6; 329 struct inpcb *in6p; 330 u_int plen = m->m_pkthdr.len; 331 int error = 0; 332 struct ip6_pktopts opt, *optp = 0; 333 struct ifnet *oifp = NULL; 334 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 335 int priv = 0; 336 va_list ap; 337 338 va_start(ap, m); 339 so = va_arg(ap, struct socket *); 340 dstsock = va_arg(ap, struct sockaddr_in6 *); 341 control = va_arg(ap, struct mbuf *); 342 va_end(ap); 343 344 in6p = sotoin6pcb(so); 345 346 priv = 0; 347 if (so->so_cred->cr_uid == 0) 348 priv = 1; 349 dst = &dstsock->sin6_addr; 350 if (control) { 351 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 352 goto bad; 353 optp = &opt; 354 } else 355 optp = in6p->in6p_outputopts; 356 357 /* 358 * For an ICMPv6 packet, we should know its type and code 359 * to update statistics. 360 */ 361 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 362 struct icmp6_hdr *icmp6; 363 if (m->m_len < sizeof(struct icmp6_hdr) && 364 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 365 error = ENOBUFS; 366 goto bad; 367 } 368 icmp6 = mtod(m, struct icmp6_hdr *); 369 type = icmp6->icmp6_type; 370 code = icmp6->icmp6_code; 371 } 372 373 M_PREPEND(m, sizeof(*ip6), M_WAIT); 374 ip6 = mtod(m, struct ip6_hdr *); 375 376 /* 377 * Next header might not be ICMP6 but use its pseudo header anyway. 378 */ 379 ip6->ip6_dst = *dst; 380 381 /* 382 * If the scope of the destination is link-local, embed the interface 383 * index in the address. 384 * 385 * XXX advanced-api value overrides sin6_scope_id 386 */ 387 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 388 struct in6_pktinfo *pi; 389 390 /* 391 * XXX Boundary check is assumed to be already done in 392 * ip6_setpktoptions(). 393 */ 394 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 395 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 396 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 397 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 398 in6p->in6p_moptions && 399 in6p->in6p_moptions->im6o_multicast_ifp) { 400 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 401 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 402 } else if (dstsock->sin6_scope_id) { 403 /* boundary check */ 404 if (dstsock->sin6_scope_id < 0 405 || if_index < dstsock->sin6_scope_id) { 406 error = ENXIO; /* XXX EINVAL? */ 407 goto bad; 408 } 409 ip6->ip6_dst.s6_addr16[1] 410 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 411 } 412 } 413 414 /* 415 * Source address selection. 416 */ 417 { 418 struct in6_addr *in6a; 419 420 if ((in6a = in6_selectsrc(dstsock, optp, 421 in6p->in6p_moptions, 422 &in6p->in6p_route, 423 &in6p->in6p_laddr, 424 &error)) == 0) { 425 if (error == 0) 426 error = EADDRNOTAVAIL; 427 goto bad; 428 } 429 ip6->ip6_src = *in6a; 430 if (in6p->in6p_route.ro_rt) 431 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 432 } 433 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 434 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 435 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 436 (IPV6_VERSION & IPV6_VERSION_MASK); 437 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 438 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 439 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 440 441 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 442 in6p->in6p_cksum != -1) { 443 struct mbuf *n; 444 int off; 445 u_int16_t *p; 446 447 /* compute checksum */ 448 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 449 off = offsetof(struct icmp6_hdr, icmp6_cksum); 450 else 451 off = in6p->in6p_cksum; 452 if (plen < off + 1) { 453 error = EINVAL; 454 goto bad; 455 } 456 off += sizeof(struct ip6_hdr); 457 458 n = m; 459 while (n && n->m_len <= off) { 460 off -= n->m_len; 461 n = n->m_next; 462 } 463 if (!n) 464 goto bad; 465 p = (u_int16_t *)(mtod(n, caddr_t) + off); 466 *p = 0; 467 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 468 } 469 470 error = ip6_output(m, optp, &in6p->in6p_route, 0, 471 in6p->in6p_moptions, &oifp, in6p); 472 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 473 if (oifp) 474 icmp6_ifoutstat_inc(oifp, type, code); 475 icmp6stat.icp6s_outhist[type]++; 476 } else 477 rip6stat.rip6s_opackets++; 478 479 goto freectl; 480 481 bad: 482 if (m) 483 m_freem(m); 484 485 freectl: 486 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 487 RTFREE(optp->ip6po_route.ro_rt); 488 if (control) { 489 if (optp == &opt) 490 ip6_clearpktopts(optp, 0, -1); 491 m_freem(control); 492 } 493 return(error); 494 } 495 496 /* 497 * Raw IPv6 socket option processing. 498 */ 499 int 500 rip6_ctloutput(so, sopt) 501 struct socket *so; 502 struct sockopt *sopt; 503 { 504 int error; 505 506 if (sopt->sopt_level == IPPROTO_ICMPV6) 507 /* 508 * XXX: is it better to call icmp6_ctloutput() directly 509 * from protosw? 510 */ 511 return(icmp6_ctloutput(so, sopt)); 512 else if (sopt->sopt_level != IPPROTO_IPV6) 513 return (EINVAL); 514 515 error = 0; 516 517 switch (sopt->sopt_dir) { 518 case SOPT_GET: 519 switch (sopt->sopt_name) { 520 case MRT6_INIT: 521 case MRT6_DONE: 522 case MRT6_ADD_MIF: 523 case MRT6_DEL_MIF: 524 case MRT6_ADD_MFC: 525 case MRT6_DEL_MFC: 526 case MRT6_PIM: 527 error = ip6_mrouter_get(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 default: 547 error = ip6_ctloutput(so, sopt); 548 break; 549 } 550 break; 551 } 552 553 return (error); 554 } 555 556 static int 557 rip6_attach(struct socket *so, int proto, struct thread *td) 558 { 559 struct inpcb *inp; 560 int error, s; 561 562 inp = sotoinpcb(so); 563 if (inp) 564 panic("rip6_attach"); 565 if ((error = suser(td)) != 0) 566 return error; 567 568 error = soreserve(so, rip_sendspace, rip_recvspace); 569 if (error) 570 return error; 571 s = splnet(); 572 error = in_pcballoc(so, &ripcbinfo, td); 573 splx(s); 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 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 584 return 0; 585 } 586 587 static int 588 rip6_detach(struct socket *so) 589 { 590 struct inpcb *inp; 591 592 inp = sotoinpcb(so); 593 if (inp == 0) 594 panic("rip6_detach"); 595 /* xxx: RSVP */ 596 if (so == ip6_mrouter) 597 ip6_mrouter_done(); 598 if (inp->in6p_icmp6filt) { 599 FREE(inp->in6p_icmp6filt, M_PCB); 600 inp->in6p_icmp6filt = NULL; 601 } 602 in6_pcbdetach(inp); 603 return 0; 604 } 605 606 static int 607 rip6_abort(struct socket *so) 608 { 609 soisdisconnected(so); 610 return rip6_detach(so); 611 } 612 613 static int 614 rip6_disconnect(struct socket *so) 615 { 616 struct inpcb *inp = sotoinpcb(so); 617 618 if ((so->so_state & SS_ISCONNECTED) == 0) 619 return ENOTCONN; 620 inp->in6p_faddr = in6addr_any; 621 return rip6_abort(so); 622 } 623 624 static int 625 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 626 { 627 struct inpcb *inp = sotoinpcb(so); 628 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 629 struct ifaddr *ia = NULL; 630 631 if (nam->sa_len != sizeof(*addr)) 632 return EINVAL; 633 634 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 635 return EADDRNOTAVAIL; 636 #ifdef ENABLE_DEFAULT_SCOPE 637 if (addr->sin6_scope_id == 0) { /* not change if specified */ 638 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 639 } 640 #endif 641 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 642 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 643 return EADDRNOTAVAIL; 644 if (ia && 645 ((struct in6_ifaddr *)ia)->ia6_flags & 646 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 647 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 648 return(EADDRNOTAVAIL); 649 } 650 inp->in6p_laddr = addr->sin6_addr; 651 return 0; 652 } 653 654 static int 655 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 656 { 657 struct inpcb *inp = sotoinpcb(so); 658 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 659 struct in6_addr *in6a = NULL; 660 int error = 0; 661 #ifdef ENABLE_DEFAULT_SCOPE 662 struct sockaddr_in6 tmp; 663 #endif 664 665 if (nam->sa_len != sizeof(*addr)) 666 return EINVAL; 667 if (TAILQ_EMPTY(&ifnet)) 668 return EADDRNOTAVAIL; 669 if (addr->sin6_family != AF_INET6) 670 return EAFNOSUPPORT; 671 #ifdef ENABLE_DEFAULT_SCOPE 672 if (addr->sin6_scope_id == 0) { /* not change if specified */ 673 /* avoid overwrites */ 674 tmp = *addr; 675 addr = &tmp; 676 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 677 } 678 #endif 679 /* Source address selection. XXX: need pcblookup? */ 680 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 681 inp->in6p_moptions, &inp->in6p_route, 682 &inp->in6p_laddr, &error); 683 if (in6a == NULL) 684 return (error ? error : EADDRNOTAVAIL); 685 inp->in6p_laddr = *in6a; 686 inp->in6p_faddr = addr->sin6_addr; 687 soisconnected(so); 688 return 0; 689 } 690 691 static int 692 rip6_shutdown(struct socket *so) 693 { 694 socantsendmore(so); 695 return 0; 696 } 697 698 static int 699 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 700 struct mbuf *control, struct thread *td) 701 { 702 struct inpcb *inp = sotoinpcb(so); 703 struct sockaddr_in6 tmp; 704 struct sockaddr_in6 *dst; 705 706 /* always copy sockaddr to avoid overwrites */ 707 if (so->so_state & SS_ISCONNECTED) { 708 if (nam) { 709 m_freem(m); 710 return EISCONN; 711 } 712 /* XXX */ 713 bzero(&tmp, sizeof(tmp)); 714 tmp.sin6_family = AF_INET6; 715 tmp.sin6_len = sizeof(struct sockaddr_in6); 716 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 717 sizeof(struct in6_addr)); 718 dst = &tmp; 719 } else { 720 if (nam == NULL) { 721 m_freem(m); 722 return ENOTCONN; 723 } 724 tmp = *(struct sockaddr_in6 *)nam; 725 dst = &tmp; 726 } 727 #ifdef ENABLE_DEFAULT_SCOPE 728 if (dst->sin6_scope_id == 0) { /* not change if specified */ 729 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 730 } 731 #endif 732 return rip6_output(m, so, dst, control); 733 } 734 735 struct pr_usrreqs rip6_usrreqs = { 736 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 737 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 738 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 739 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 740 in6_setsockaddr, sosend, soreceive, sopoll 741 }; 742