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 1.26 2008/05/17 20:33:36 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/jail.h> 77 #include <sys/protosw.h> 78 #include <sys/socketvar.h> 79 #include <sys/errno.h> 80 #include <sys/systm.h> 81 #include <sys/thread2.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 #include <net/if_types.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/ip6_mroute.h> 93 #include <netinet/icmp6.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/nd6.h> 97 #include <netinet6/ip6protosw.h> 98 #ifdef ENABLE_DEFAULT_SCOPE 99 #include <netinet6/scope6_var.h> 100 #endif 101 #include <netinet6/raw_ip6.h> 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #include <netinet6/ipsec6.h> 106 #endif /*IPSEC*/ 107 108 #ifdef FAST_IPSEC 109 #include <netproto/ipsec/ipsec.h> 110 #include <netproto/ipsec/ipsec6.h> 111 #endif /* FAST_IPSEC */ 112 113 #include <machine/stdarg.h> 114 115 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 116 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 117 118 /* 119 * Raw interface to IP6 protocol. 120 */ 121 122 extern struct inpcbinfo ripcbinfo; 123 extern u_long rip_sendspace; 124 extern u_long rip_recvspace; 125 126 struct rip6stat rip6stat; 127 128 /* 129 * Setup generic address and protocol structures 130 * for raw_input routine, then pass them along with 131 * mbuf chain. 132 */ 133 int 134 rip6_input(struct mbuf **mp, int *offp, int proto) 135 { 136 struct mbuf *m = *mp; 137 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 138 struct inpcb *in6p; 139 struct inpcb *last = 0; 140 struct mbuf *opts = NULL; 141 struct sockaddr_in6 rip6src; 142 143 rip6stat.rip6s_ipackets++; 144 145 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 146 /* XXX send icmp6 host/port unreach? */ 147 m_freem(m); 148 return IPPROTO_DONE; 149 } 150 151 init_sin6(&rip6src, m); /* general init */ 152 153 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 154 if (in6p->in6p_flags & INP_PLACEMARKER) 155 continue; 156 if (!(in6p->in6p_vflag & INP_IPV6)) 157 continue; 158 if (in6p->in6p_ip6_nxt && 159 in6p->in6p_ip6_nxt != proto) 160 continue; 161 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 162 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 163 continue; 164 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 165 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 166 continue; 167 if (in6p->in6p_cksum != -1) { 168 rip6stat.rip6s_isum++; 169 if (in6_cksum(m, ip6->ip6_nxt, *offp, 170 m->m_pkthdr.len - *offp)) { 171 rip6stat.rip6s_badsum++; 172 continue; 173 } 174 } 175 if (last) { 176 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 177 178 #ifdef IPSEC 179 /* 180 * Check AH/ESP integrity. 181 */ 182 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 183 m_freem(n); 184 ipsec6stat.in_polvio++; 185 /* do not inject data into pcb */ 186 } else 187 #endif /*IPSEC*/ 188 #ifdef FAST_IPSEC 189 /* 190 * Check AH/ESP integrity. 191 */ 192 if (n && ipsec6_in_reject(n, last)) { 193 m_freem(n); 194 /* do not inject data into pcb */ 195 } else 196 #endif /*FAST_IPSEC*/ 197 if (n) { 198 if (last->in6p_flags & IN6P_CONTROLOPTS || 199 last->in6p_socket->so_options & SO_TIMESTAMP) 200 ip6_savecontrol(last, &opts, ip6, n); 201 /* strip intermediate headers */ 202 m_adj(n, *offp); 203 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 204 (struct sockaddr *)&rip6src, 205 n, opts) == 0) { 206 m_freem(n); 207 if (opts) 208 m_freem(opts); 209 rip6stat.rip6s_fullsock++; 210 } else 211 sorwakeup(last->in6p_socket); 212 opts = NULL; 213 } 214 } 215 last = in6p; 216 } 217 #ifdef IPSEC 218 /* 219 * Check AH/ESP integrity. 220 */ 221 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 222 m_freem(m); 223 ipsec6stat.in_polvio++; 224 ip6stat.ip6s_delivered--; 225 /* do not inject data into pcb */ 226 } else 227 #endif /*IPSEC*/ 228 #ifdef FAST_IPSEC 229 /* 230 * Check AH/ESP integrity. 231 */ 232 if (last && ipsec6_in_reject(m, last)) { 233 m_freem(m); 234 ip6stat.ip6s_delivered--; 235 /* do not inject data into pcb */ 236 } else 237 #endif /*FAST_IPSEC*/ 238 if (last) { 239 if (last->in6p_flags & IN6P_CONTROLOPTS || 240 last->in6p_socket->so_options & SO_TIMESTAMP) 241 ip6_savecontrol(last, &opts, ip6, m); 242 /* strip intermediate headers */ 243 m_adj(m, *offp); 244 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 245 (struct sockaddr *)&rip6src, m, opts) == 0) { 246 m_freem(m); 247 if (opts) 248 m_freem(opts); 249 rip6stat.rip6s_fullsock++; 250 } else 251 sorwakeup(last->in6p_socket); 252 } else { 253 rip6stat.rip6s_nosock++; 254 if (m->m_flags & M_MCAST) 255 rip6stat.rip6s_nosockmcast++; 256 if (proto == IPPROTO_NONE) 257 m_freem(m); 258 else { 259 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 260 icmp6_error(m, ICMP6_PARAM_PROB, 261 ICMP6_PARAMPROB_NEXTHEADER, 262 prvnxtp - mtod(m, char *)); 263 } 264 ip6stat.ip6s_delivered--; 265 } 266 return IPPROTO_DONE; 267 } 268 269 void 270 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 271 { 272 struct ip6_hdr *ip6; 273 struct mbuf *m; 274 int off = 0; 275 struct ip6ctlparam *ip6cp = NULL; 276 const struct sockaddr_in6 *sa6_src = NULL; 277 void (*notify) (struct inpcb *, int) = in6_rtchange; 278 279 if (sa->sa_family != AF_INET6 || 280 sa->sa_len != sizeof(struct sockaddr_in6)) 281 return; 282 283 if ((unsigned)cmd >= PRC_NCMDS) 284 return; 285 if (PRC_IS_REDIRECT(cmd)) 286 notify = in6_rtchange, d = NULL; 287 else if (cmd == PRC_HOSTDEAD) 288 d = NULL; 289 else if (inet6ctlerrmap[cmd] == 0) 290 return; 291 292 /* if the parameter is from icmp6, decode it. */ 293 if (d != NULL) { 294 ip6cp = (struct ip6ctlparam *)d; 295 m = ip6cp->ip6c_m; 296 ip6 = ip6cp->ip6c_ip6; 297 off = ip6cp->ip6c_off; 298 sa6_src = ip6cp->ip6c_src; 299 } else { 300 m = NULL; 301 ip6 = NULL; 302 sa6_src = &sa6_any; 303 } 304 305 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 306 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 307 } 308 309 /* 310 * Generate IPv6 header and pass packet to ip6_output. 311 * Tack on options user may have setup with control call. 312 */ 313 int 314 rip6_output(struct mbuf *m, struct socket *so, ...) 315 { 316 struct sockaddr_in6 *dstsock; 317 struct mbuf *control; 318 struct in6_addr *dst; 319 struct ip6_hdr *ip6; 320 struct inpcb *in6p; 321 u_int plen = m->m_pkthdr.len; 322 int error = 0; 323 struct ip6_pktopts opt, *optp = 0; 324 struct ifnet *oifp = NULL; 325 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 326 int priv = 0; 327 __va_list ap; 328 329 __va_start(ap, so); 330 dstsock = __va_arg(ap, struct sockaddr_in6 *); 331 control = __va_arg(ap, struct mbuf *); 332 __va_end(ap); 333 334 in6p = so->so_pcb; 335 336 priv = 0; 337 if (so->so_cred->cr_uid == 0) 338 priv = 1; 339 dst = &dstsock->sin6_addr; 340 if (control) { 341 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 342 goto bad; 343 optp = &opt; 344 } else 345 optp = in6p->in6p_outputopts; 346 347 /* 348 * For an ICMPv6 packet, we should know its type and code 349 * to update statistics. 350 */ 351 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 352 struct icmp6_hdr *icmp6; 353 if (m->m_len < sizeof(struct icmp6_hdr) && 354 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 355 error = ENOBUFS; 356 goto bad; 357 } 358 icmp6 = mtod(m, struct icmp6_hdr *); 359 type = icmp6->icmp6_type; 360 code = icmp6->icmp6_code; 361 } 362 363 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 364 ip6 = mtod(m, struct ip6_hdr *); 365 366 /* 367 * Next header might not be ICMP6 but use its pseudo header anyway. 368 */ 369 ip6->ip6_dst = *dst; 370 371 /* 372 * If the scope of the destination is link-local, embed the interface 373 * index in the address. 374 * 375 * XXX advanced-api value overrides sin6_scope_id 376 */ 377 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 378 struct in6_pktinfo *pi; 379 380 /* 381 * XXX Boundary check is assumed to be already done in 382 * ip6_setpktoptions(). 383 */ 384 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 385 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 386 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 387 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 388 in6p->in6p_moptions && 389 in6p->in6p_moptions->im6o_multicast_ifp) { 390 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 391 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 392 } else if (dstsock->sin6_scope_id) { 393 /* boundary check */ 394 if (dstsock->sin6_scope_id < 0 395 || if_index < dstsock->sin6_scope_id) { 396 error = ENXIO; /* XXX EINVAL? */ 397 goto bad; 398 } 399 ip6->ip6_dst.s6_addr16[1] 400 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 401 } 402 } 403 404 /* 405 * Source address selection. 406 */ 407 { 408 struct in6_addr *in6a; 409 410 if ((in6a = in6_selectsrc(dstsock, optp, 411 in6p->in6p_moptions, 412 &in6p->in6p_route, 413 &in6p->in6p_laddr, 414 &error, NULL)) == NULL) { 415 if (error == 0) 416 error = EADDRNOTAVAIL; 417 goto bad; 418 } 419 ip6->ip6_src = *in6a; 420 if (in6p->in6p_route.ro_rt) 421 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 422 } 423 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 424 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 425 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 426 (IPV6_VERSION & IPV6_VERSION_MASK); 427 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 428 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 429 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 430 431 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 432 in6p->in6p_cksum != -1) { 433 struct mbuf *n; 434 int off; 435 u_int16_t *p; 436 437 /* compute checksum */ 438 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 439 off = offsetof(struct icmp6_hdr, icmp6_cksum); 440 else 441 off = in6p->in6p_cksum; 442 if (plen < off + 1) { 443 error = EINVAL; 444 goto bad; 445 } 446 off += sizeof(struct ip6_hdr); 447 448 n = m; 449 while (n && n->m_len <= off) { 450 off -= n->m_len; 451 n = n->m_next; 452 } 453 if (!n) 454 goto bad; 455 p = (u_int16_t *)(mtod(n, caddr_t) + off); 456 *p = 0; 457 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 458 } 459 460 error = ip6_output(m, optp, &in6p->in6p_route, 0, 461 in6p->in6p_moptions, &oifp, in6p); 462 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 463 if (oifp) 464 icmp6_ifoutstat_inc(oifp, type, code); 465 icmp6stat.icp6s_outhist[type]++; 466 } else 467 rip6stat.rip6s_opackets++; 468 469 goto freectl; 470 471 bad: 472 if (m) 473 m_freem(m); 474 475 freectl: 476 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 477 RTFREE(optp->ip6po_route.ro_rt); 478 if (control) { 479 if (optp == &opt) 480 ip6_clearpktopts(optp, 0, -1); 481 m_freem(control); 482 } 483 return (error); 484 } 485 486 /* 487 * Raw IPv6 socket option processing. 488 */ 489 int 490 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 491 { 492 int error; 493 494 if (sopt->sopt_level == IPPROTO_ICMPV6) 495 /* 496 * XXX: is it better to call icmp6_ctloutput() directly 497 * from protosw? 498 */ 499 return (icmp6_ctloutput(so, sopt)); 500 else if (sopt->sopt_level != IPPROTO_IPV6) 501 return (EINVAL); 502 503 error = 0; 504 505 switch (sopt->sopt_dir) { 506 case SOPT_GET: 507 switch (sopt->sopt_name) { 508 case MRT6_INIT: 509 case MRT6_DONE: 510 case MRT6_ADD_MIF: 511 case MRT6_DEL_MIF: 512 case MRT6_ADD_MFC: 513 case MRT6_DEL_MFC: 514 case MRT6_PIM: 515 error = ip6_mrouter_get(so, sopt); 516 break; 517 default: 518 error = ip6_ctloutput(so, sopt); 519 break; 520 } 521 break; 522 523 case SOPT_SET: 524 switch (sopt->sopt_name) { 525 case MRT6_INIT: 526 case MRT6_DONE: 527 case MRT6_ADD_MIF: 528 case MRT6_DEL_MIF: 529 case MRT6_ADD_MFC: 530 case MRT6_DEL_MFC: 531 case MRT6_PIM: 532 error = ip6_mrouter_set(so, sopt); 533 break; 534 default: 535 error = ip6_ctloutput(so, sopt); 536 break; 537 } 538 break; 539 } 540 541 return (error); 542 } 543 544 static int 545 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 546 { 547 struct inpcb *inp; 548 int error; 549 int flag; 550 551 if (jailed(ai->p_ucred) && jail_allow_raw_sockets) 552 flag = NULL_CRED_OKAY | PRISON_ROOT; 553 else 554 flag = NULL_CRED_OKAY; 555 556 inp = so->so_pcb; 557 if (inp) 558 panic("rip6_attach"); 559 if ((error = suser_cred(ai->p_ucred, flag)) != 0) 560 return error; 561 562 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 563 if (error) 564 return error; 565 crit_enter(); 566 error = in_pcballoc(so, &ripcbinfo); 567 crit_exit(); 568 if (error) 569 return error; 570 inp = (struct inpcb *)so->so_pcb; 571 inp->inp_vflag |= INP_IPV6; 572 inp->in6p_ip6_nxt = (long)proto; 573 inp->in6p_hops = -1; /* use kernel default */ 574 inp->in6p_cksum = -1; 575 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 576 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 577 if (inp->in6p_icmp6filt != NULL) 578 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 579 return 0; 580 } 581 582 static int 583 rip6_detach(struct socket *so) 584 { 585 struct inpcb *inp; 586 587 inp = so->so_pcb; 588 if (inp == NULL) 589 panic("rip6_detach"); 590 /* xxx: RSVP */ 591 if (so == ip6_mrouter) 592 ip6_mrouter_done(); 593 if (inp->in6p_icmp6filt) { 594 FREE(inp->in6p_icmp6filt, M_PCB); 595 inp->in6p_icmp6filt = NULL; 596 } 597 in6_pcbdetach(inp); 598 return 0; 599 } 600 601 static int 602 rip6_abort(struct socket *so) 603 { 604 soisdisconnected(so); 605 return rip6_detach(so); 606 } 607 608 static int 609 rip6_disconnect(struct socket *so) 610 { 611 struct inpcb *inp = so->so_pcb; 612 613 if (!(so->so_state & SS_ISCONNECTED)) 614 return ENOTCONN; 615 inp->in6p_faddr = kin6addr_any; 616 return rip6_abort(so); 617 } 618 619 static int 620 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 621 { 622 struct inpcb *inp = so->so_pcb; 623 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 624 struct ifaddr *ia = NULL; 625 626 if (nam->sa_len != sizeof(*addr)) 627 return EINVAL; 628 629 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 630 return EADDRNOTAVAIL; 631 #ifdef ENABLE_DEFAULT_SCOPE 632 if (addr->sin6_scope_id == 0) { /* not change if specified */ 633 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 634 } 635 #endif 636 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 637 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 638 return EADDRNOTAVAIL; 639 if (ia && 640 ((struct in6_ifaddr *)ia)->ia6_flags & 641 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 642 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 643 return (EADDRNOTAVAIL); 644 } 645 inp->in6p_laddr = addr->sin6_addr; 646 return 0; 647 } 648 649 static int 650 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 651 { 652 struct inpcb *inp = so->so_pcb; 653 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 654 struct in6_addr *in6a = NULL; 655 int error = 0; 656 #ifdef ENABLE_DEFAULT_SCOPE 657 struct sockaddr_in6 tmp; 658 #endif 659 660 if (nam->sa_len != sizeof(*addr)) 661 return EINVAL; 662 if (TAILQ_EMPTY(&ifnet)) 663 return EADDRNOTAVAIL; 664 if (addr->sin6_family != AF_INET6) 665 return EAFNOSUPPORT; 666 #ifdef ENABLE_DEFAULT_SCOPE 667 if (addr->sin6_scope_id == 0) { /* not change if specified */ 668 /* avoid overwrites */ 669 tmp = *addr; 670 addr = &tmp; 671 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 672 } 673 #endif 674 /* Source address selection. XXX: need pcblookup? */ 675 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 676 inp->in6p_moptions, &inp->in6p_route, 677 &inp->in6p_laddr, &error, NULL); 678 if (in6a == NULL) 679 return (error ? error : EADDRNOTAVAIL); 680 inp->in6p_laddr = *in6a; 681 inp->in6p_faddr = addr->sin6_addr; 682 soisconnected(so); 683 return 0; 684 } 685 686 static int 687 rip6_shutdown(struct socket *so) 688 { 689 socantsendmore(so); 690 return 0; 691 } 692 693 static int 694 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 695 struct mbuf *control, struct thread *td) 696 { 697 struct inpcb *inp = so->so_pcb; 698 struct sockaddr_in6 tmp; 699 struct sockaddr_in6 *dst; 700 701 /* always copy sockaddr to avoid overwrites */ 702 if (so->so_state & SS_ISCONNECTED) { 703 if (nam) { 704 m_freem(m); 705 return EISCONN; 706 } 707 /* XXX */ 708 bzero(&tmp, sizeof(tmp)); 709 tmp.sin6_family = AF_INET6; 710 tmp.sin6_len = sizeof(struct sockaddr_in6); 711 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 712 sizeof(struct in6_addr)); 713 dst = &tmp; 714 } else { 715 if (nam == NULL) { 716 m_freem(m); 717 return ENOTCONN; 718 } 719 tmp = *(struct sockaddr_in6 *)nam; 720 dst = &tmp; 721 } 722 #ifdef ENABLE_DEFAULT_SCOPE 723 if (dst->sin6_scope_id == 0) { /* not change if specified */ 724 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 725 } 726 #endif 727 return rip6_output(m, so, dst, control); 728 } 729 730 struct pr_usrreqs rip6_usrreqs = { 731 .pru_abort = rip6_abort, 732 .pru_accept = pru_accept_notsupp, 733 .pru_attach = rip6_attach, 734 .pru_bind = rip6_bind, 735 .pru_connect = rip6_connect, 736 .pru_connect2 = pru_connect2_notsupp, 737 .pru_control = in6_control, 738 .pru_detach = rip6_detach, 739 .pru_disconnect = rip6_disconnect, 740 .pru_listen = pru_listen_notsupp, 741 .pru_peeraddr = in6_setpeeraddr, 742 .pru_rcvd = pru_rcvd_notsupp, 743 .pru_rcvoob = pru_rcvoob_notsupp, 744 .pru_send = rip6_send, 745 .pru_sense = pru_sense_null, 746 .pru_shutdown = rip6_shutdown, 747 .pru_sockaddr = in6_setsockaddr, 748 .pru_sosend = sosend, 749 .pru_soreceive = soreceive, 750 .pru_sopoll = sopoll 751 }; 752