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 1.18 2005/03/06 05:09:25 hsu 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 <netproto/ipsec/ipsec.h> 108 #include <netproto/ipsec/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 inpcbinfo ripcbinfo; 121 extern u_long rip_sendspace; 122 extern u_long rip_recvspace; 123 124 struct rip6stat rip6stat; 125 126 /* 127 * Setup generic address and protocol structures 128 * for raw_input routine, then pass them along with 129 * mbuf chain. 130 */ 131 int 132 rip6_input(struct mbuf **mp, int *offp, int proto) 133 { 134 struct mbuf *m = *mp; 135 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 136 struct inpcb *in6p; 137 struct inpcb *last = 0; 138 struct mbuf *opts = NULL; 139 struct sockaddr_in6 rip6src; 140 141 rip6stat.rip6s_ipackets++; 142 143 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 144 /* XXX send icmp6 host/port unreach? */ 145 m_freem(m); 146 return IPPROTO_DONE; 147 } 148 149 init_sin6(&rip6src, m); /* general init */ 150 151 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 152 if (in6p->in6p_flags & INP_PLACEMARKER) 153 continue; 154 if ((in6p->in6p_vflag & INP_IPV6) == 0) 155 continue; 156 if (in6p->in6p_ip6_nxt && 157 in6p->in6p_ip6_nxt != proto) 158 continue; 159 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 160 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 161 continue; 162 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 163 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 164 continue; 165 if (in6p->in6p_cksum != -1) { 166 rip6stat.rip6s_isum++; 167 if (in6_cksum(m, ip6->ip6_nxt, *offp, 168 m->m_pkthdr.len - *offp)) { 169 rip6stat.rip6s_badsum++; 170 continue; 171 } 172 } 173 if (last) { 174 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 175 176 #ifdef IPSEC 177 /* 178 * Check AH/ESP integrity. 179 */ 180 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 181 m_freem(n); 182 ipsec6stat.in_polvio++; 183 /* do not inject data into pcb */ 184 } else 185 #endif /*IPSEC*/ 186 #ifdef FAST_IPSEC 187 /* 188 * Check AH/ESP integrity. 189 */ 190 if (n && ipsec6_in_reject(n, last)) { 191 m_freem(n); 192 /* do not inject data into pcb */ 193 } else 194 #endif /*FAST_IPSEC*/ 195 if (n) { 196 if (last->in6p_flags & IN6P_CONTROLOPTS || 197 last->in6p_socket->so_options & SO_TIMESTAMP) 198 ip6_savecontrol(last, &opts, ip6, n); 199 /* strip intermediate headers */ 200 m_adj(n, *offp); 201 if (sbappendaddr(&last->in6p_socket->so_rcv, 202 (struct sockaddr *)&rip6src, 203 n, opts) == 0) { 204 m_freem(n); 205 if (opts) 206 m_freem(opts); 207 rip6stat.rip6s_fullsock++; 208 } else 209 sorwakeup(last->in6p_socket); 210 opts = NULL; 211 } 212 } 213 last = in6p; 214 } 215 #ifdef IPSEC 216 /* 217 * Check AH/ESP integrity. 218 */ 219 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 220 m_freem(m); 221 ipsec6stat.in_polvio++; 222 ip6stat.ip6s_delivered--; 223 /* do not inject data into pcb */ 224 } else 225 #endif /*IPSEC*/ 226 #ifdef FAST_IPSEC 227 /* 228 * Check AH/ESP integrity. 229 */ 230 if (last && ipsec6_in_reject(m, last)) { 231 m_freem(m); 232 ip6stat.ip6s_delivered--; 233 /* do not inject data into pcb */ 234 } else 235 #endif /*FAST_IPSEC*/ 236 if (last) { 237 if (last->in6p_flags & IN6P_CONTROLOPTS || 238 last->in6p_socket->so_options & SO_TIMESTAMP) 239 ip6_savecontrol(last, &opts, ip6, m); 240 /* strip intermediate headers */ 241 m_adj(m, *offp); 242 if (sbappendaddr(&last->in6p_socket->so_rcv, 243 (struct sockaddr *)&rip6src, m, opts) == 0) { 244 m_freem(m); 245 if (opts) 246 m_freem(opts); 247 rip6stat.rip6s_fullsock++; 248 } else 249 sorwakeup(last->in6p_socket); 250 } else { 251 rip6stat.rip6s_nosock++; 252 if (m->m_flags & M_MCAST) 253 rip6stat.rip6s_nosockmcast++; 254 if (proto == IPPROTO_NONE) 255 m_freem(m); 256 else { 257 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 258 icmp6_error(m, ICMP6_PARAM_PROB, 259 ICMP6_PARAMPROB_NEXTHEADER, 260 prvnxtp - mtod(m, char *)); 261 } 262 ip6stat.ip6s_delivered--; 263 } 264 return IPPROTO_DONE; 265 } 266 267 void 268 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 269 { 270 struct ip6_hdr *ip6; 271 struct mbuf *m; 272 int off = 0; 273 struct ip6ctlparam *ip6cp = NULL; 274 const struct sockaddr_in6 *sa6_src = NULL; 275 void (*notify) (struct inpcb *, int) = in6_rtchange; 276 277 if (sa->sa_family != AF_INET6 || 278 sa->sa_len != sizeof(struct sockaddr_in6)) 279 return; 280 281 if ((unsigned)cmd >= PRC_NCMDS) 282 return; 283 if (PRC_IS_REDIRECT(cmd)) 284 notify = in6_rtchange, d = NULL; 285 else if (cmd == PRC_HOSTDEAD) 286 d = NULL; 287 else if (inet6ctlerrmap[cmd] == 0) 288 return; 289 290 /* if the parameter is from icmp6, decode it. */ 291 if (d != NULL) { 292 ip6cp = (struct ip6ctlparam *)d; 293 m = ip6cp->ip6c_m; 294 ip6 = ip6cp->ip6c_ip6; 295 off = ip6cp->ip6c_off; 296 sa6_src = ip6cp->ip6c_src; 297 } else { 298 m = NULL; 299 ip6 = NULL; 300 sa6_src = &sa6_any; 301 } 302 303 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 304 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 305 } 306 307 /* 308 * Generate IPv6 header and pass packet to ip6_output. 309 * Tack on options user may have setup with control call. 310 */ 311 int 312 rip6_output(struct mbuf *m, struct socket *so, ...) 313 { 314 struct sockaddr_in6 *dstsock; 315 struct mbuf *control; 316 struct in6_addr *dst; 317 struct ip6_hdr *ip6; 318 struct inpcb *in6p; 319 u_int plen = m->m_pkthdr.len; 320 int error = 0; 321 struct ip6_pktopts opt, *optp = 0; 322 struct ifnet *oifp = NULL; 323 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 324 int priv = 0; 325 __va_list ap; 326 327 __va_start(ap, so); 328 dstsock = __va_arg(ap, struct sockaddr_in6 *); 329 control = __va_arg(ap, struct mbuf *); 330 __va_end(ap); 331 332 in6p = so->so_pcb; 333 334 priv = 0; 335 if (so->so_cred->cr_uid == 0) 336 priv = 1; 337 dst = &dstsock->sin6_addr; 338 if (control) { 339 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 340 goto bad; 341 optp = &opt; 342 } else 343 optp = in6p->in6p_outputopts; 344 345 /* 346 * For an ICMPv6 packet, we should know its type and code 347 * to update statistics. 348 */ 349 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 350 struct icmp6_hdr *icmp6; 351 if (m->m_len < sizeof(struct icmp6_hdr) && 352 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 353 error = ENOBUFS; 354 goto bad; 355 } 356 icmp6 = mtod(m, struct icmp6_hdr *); 357 type = icmp6->icmp6_type; 358 code = icmp6->icmp6_code; 359 } 360 361 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 362 ip6 = mtod(m, struct ip6_hdr *); 363 364 /* 365 * Next header might not be ICMP6 but use its pseudo header anyway. 366 */ 367 ip6->ip6_dst = *dst; 368 369 /* 370 * If the scope of the destination is link-local, embed the interface 371 * index in the address. 372 * 373 * XXX advanced-api value overrides sin6_scope_id 374 */ 375 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 376 struct in6_pktinfo *pi; 377 378 /* 379 * XXX Boundary check is assumed to be already done in 380 * ip6_setpktoptions(). 381 */ 382 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 383 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 384 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 385 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 386 in6p->in6p_moptions && 387 in6p->in6p_moptions->im6o_multicast_ifp) { 388 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 389 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 390 } else if (dstsock->sin6_scope_id) { 391 /* boundary check */ 392 if (dstsock->sin6_scope_id < 0 393 || if_index < dstsock->sin6_scope_id) { 394 error = ENXIO; /* XXX EINVAL? */ 395 goto bad; 396 } 397 ip6->ip6_dst.s6_addr16[1] 398 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 399 } 400 } 401 402 /* 403 * Source address selection. 404 */ 405 { 406 struct in6_addr *in6a; 407 408 if ((in6a = in6_selectsrc(dstsock, optp, 409 in6p->in6p_moptions, 410 &in6p->in6p_route, 411 &in6p->in6p_laddr, 412 &error)) == 0) { 413 if (error == 0) 414 error = EADDRNOTAVAIL; 415 goto bad; 416 } 417 ip6->ip6_src = *in6a; 418 if (in6p->in6p_route.ro_rt) 419 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 420 } 421 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 422 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 423 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 424 (IPV6_VERSION & IPV6_VERSION_MASK); 425 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 426 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 427 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 428 429 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 430 in6p->in6p_cksum != -1) { 431 struct mbuf *n; 432 int off; 433 u_int16_t *p; 434 435 /* compute checksum */ 436 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 437 off = offsetof(struct icmp6_hdr, icmp6_cksum); 438 else 439 off = in6p->in6p_cksum; 440 if (plen < off + 1) { 441 error = EINVAL; 442 goto bad; 443 } 444 off += sizeof(struct ip6_hdr); 445 446 n = m; 447 while (n && n->m_len <= off) { 448 off -= n->m_len; 449 n = n->m_next; 450 } 451 if (!n) 452 goto bad; 453 p = (u_int16_t *)(mtod(n, caddr_t) + off); 454 *p = 0; 455 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 456 } 457 458 error = ip6_output(m, optp, &in6p->in6p_route, 0, 459 in6p->in6p_moptions, &oifp, in6p); 460 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 461 if (oifp) 462 icmp6_ifoutstat_inc(oifp, type, code); 463 icmp6stat.icp6s_outhist[type]++; 464 } else 465 rip6stat.rip6s_opackets++; 466 467 goto freectl; 468 469 bad: 470 if (m) 471 m_freem(m); 472 473 freectl: 474 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 475 RTFREE(optp->ip6po_route.ro_rt); 476 if (control) { 477 if (optp == &opt) 478 ip6_clearpktopts(optp, 0, -1); 479 m_freem(control); 480 } 481 return(error); 482 } 483 484 /* 485 * Raw IPv6 socket option processing. 486 */ 487 int 488 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 489 { 490 int error; 491 492 if (sopt->sopt_level == IPPROTO_ICMPV6) 493 /* 494 * XXX: is it better to call icmp6_ctloutput() directly 495 * from protosw? 496 */ 497 return(icmp6_ctloutput(so, sopt)); 498 else if (sopt->sopt_level != IPPROTO_IPV6) 499 return (EINVAL); 500 501 error = 0; 502 503 switch (sopt->sopt_dir) { 504 case SOPT_GET: 505 switch (sopt->sopt_name) { 506 case MRT6_INIT: 507 case MRT6_DONE: 508 case MRT6_ADD_MIF: 509 case MRT6_DEL_MIF: 510 case MRT6_ADD_MFC: 511 case MRT6_DEL_MFC: 512 case MRT6_PIM: 513 error = ip6_mrouter_get(so, sopt); 514 break; 515 default: 516 error = ip6_ctloutput(so, sopt); 517 break; 518 } 519 break; 520 521 case SOPT_SET: 522 switch (sopt->sopt_name) { 523 case MRT6_INIT: 524 case MRT6_DONE: 525 case MRT6_ADD_MIF: 526 case MRT6_DEL_MIF: 527 case MRT6_ADD_MFC: 528 case MRT6_DEL_MFC: 529 case MRT6_PIM: 530 error = ip6_mrouter_set(so, sopt); 531 break; 532 default: 533 error = ip6_ctloutput(so, sopt); 534 break; 535 } 536 break; 537 } 538 539 return (error); 540 } 541 542 static int 543 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 544 { 545 struct inpcb *inp; 546 int error, s; 547 548 inp = so->so_pcb; 549 if (inp) 550 panic("rip6_attach"); 551 if ((error = suser_cred(ai->p_ucred, NULL_CRED_OKAY)) != 0) 552 return error; 553 554 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 555 if (error) 556 return error; 557 s = splnet(); 558 error = in_pcballoc(so, &ripcbinfo); 559 splx(s); 560 if (error) 561 return error; 562 inp = (struct inpcb *)so->so_pcb; 563 inp->inp_vflag |= INP_IPV6; 564 inp->in6p_ip6_nxt = (long)proto; 565 inp->in6p_hops = -1; /* use kernel default */ 566 inp->in6p_cksum = -1; 567 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 568 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 569 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 570 return 0; 571 } 572 573 static int 574 rip6_detach(struct socket *so) 575 { 576 struct inpcb *inp; 577 578 inp = so->so_pcb; 579 if (inp == 0) 580 panic("rip6_detach"); 581 /* xxx: RSVP */ 582 if (so == ip6_mrouter) 583 ip6_mrouter_done(); 584 if (inp->in6p_icmp6filt) { 585 FREE(inp->in6p_icmp6filt, M_PCB); 586 inp->in6p_icmp6filt = NULL; 587 } 588 in6_pcbdetach(inp); 589 return 0; 590 } 591 592 static int 593 rip6_abort(struct socket *so) 594 { 595 soisdisconnected(so); 596 return rip6_detach(so); 597 } 598 599 static int 600 rip6_disconnect(struct socket *so) 601 { 602 struct inpcb *inp = so->so_pcb; 603 604 if ((so->so_state & SS_ISCONNECTED) == 0) 605 return ENOTCONN; 606 inp->in6p_faddr = in6addr_any; 607 return rip6_abort(so); 608 } 609 610 static int 611 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 612 { 613 struct inpcb *inp = so->so_pcb; 614 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 615 struct ifaddr *ia = NULL; 616 617 if (nam->sa_len != sizeof(*addr)) 618 return EINVAL; 619 620 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 621 return EADDRNOTAVAIL; 622 #ifdef ENABLE_DEFAULT_SCOPE 623 if (addr->sin6_scope_id == 0) { /* not change if specified */ 624 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 625 } 626 #endif 627 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 628 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 629 return EADDRNOTAVAIL; 630 if (ia && 631 ((struct in6_ifaddr *)ia)->ia6_flags & 632 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 633 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 634 return(EADDRNOTAVAIL); 635 } 636 inp->in6p_laddr = addr->sin6_addr; 637 return 0; 638 } 639 640 static int 641 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 642 { 643 struct inpcb *inp = so->so_pcb; 644 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 645 struct in6_addr *in6a = NULL; 646 int error = 0; 647 #ifdef ENABLE_DEFAULT_SCOPE 648 struct sockaddr_in6 tmp; 649 #endif 650 651 if (nam->sa_len != sizeof(*addr)) 652 return EINVAL; 653 if (TAILQ_EMPTY(&ifnet)) 654 return EADDRNOTAVAIL; 655 if (addr->sin6_family != AF_INET6) 656 return EAFNOSUPPORT; 657 #ifdef ENABLE_DEFAULT_SCOPE 658 if (addr->sin6_scope_id == 0) { /* not change if specified */ 659 /* avoid overwrites */ 660 tmp = *addr; 661 addr = &tmp; 662 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 663 } 664 #endif 665 /* Source address selection. XXX: need pcblookup? */ 666 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 667 inp->in6p_moptions, &inp->in6p_route, 668 &inp->in6p_laddr, &error); 669 if (in6a == NULL) 670 return (error ? error : EADDRNOTAVAIL); 671 inp->in6p_laddr = *in6a; 672 inp->in6p_faddr = addr->sin6_addr; 673 soisconnected(so); 674 return 0; 675 } 676 677 static int 678 rip6_shutdown(struct socket *so) 679 { 680 socantsendmore(so); 681 return 0; 682 } 683 684 static int 685 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 686 struct mbuf *control, struct thread *td) 687 { 688 struct inpcb *inp = so->so_pcb; 689 struct sockaddr_in6 tmp; 690 struct sockaddr_in6 *dst; 691 692 /* always copy sockaddr to avoid overwrites */ 693 if (so->so_state & SS_ISCONNECTED) { 694 if (nam) { 695 m_freem(m); 696 return EISCONN; 697 } 698 /* XXX */ 699 bzero(&tmp, sizeof(tmp)); 700 tmp.sin6_family = AF_INET6; 701 tmp.sin6_len = sizeof(struct sockaddr_in6); 702 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 703 sizeof(struct in6_addr)); 704 dst = &tmp; 705 } else { 706 if (nam == NULL) { 707 m_freem(m); 708 return ENOTCONN; 709 } 710 tmp = *(struct sockaddr_in6 *)nam; 711 dst = &tmp; 712 } 713 #ifdef ENABLE_DEFAULT_SCOPE 714 if (dst->sin6_scope_id == 0) { /* not change if specified */ 715 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 716 } 717 #endif 718 return rip6_output(m, so, dst, control); 719 } 720 721 struct pr_usrreqs rip6_usrreqs = { 722 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 723 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 724 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 725 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 726 in6_setsockaddr, sosend, soreceive, sopoll 727 }; 728