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/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, 342 in6p->in6p_outputopts, 343 so->so_proto->pr_protocol, priv)) != 0) 344 goto bad; 345 optp = &opt; 346 } else 347 optp = in6p->in6p_outputopts; 348 349 /* 350 * For an ICMPv6 packet, we should know its type and code 351 * to update statistics. 352 */ 353 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 354 struct icmp6_hdr *icmp6; 355 if (m->m_len < sizeof(struct icmp6_hdr) && 356 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 357 error = ENOBUFS; 358 goto bad; 359 } 360 icmp6 = mtod(m, struct icmp6_hdr *); 361 type = icmp6->icmp6_type; 362 code = icmp6->icmp6_code; 363 } 364 365 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 366 ip6 = mtod(m, struct ip6_hdr *); 367 368 /* 369 * Next header might not be ICMP6 but use its pseudo header anyway. 370 */ 371 ip6->ip6_dst = *dst; 372 373 /* 374 * If the scope of the destination is link-local, embed the interface 375 * index in the address. 376 * 377 * XXX advanced-api value overrides sin6_scope_id 378 */ 379 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 380 struct in6_pktinfo *pi; 381 382 /* 383 * XXX Boundary check is assumed to be already done in 384 * ip6_setpktoptions(). 385 */ 386 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 387 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 388 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 389 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 390 in6p->in6p_moptions && 391 in6p->in6p_moptions->im6o_multicast_ifp) { 392 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 393 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 394 } else if (dstsock->sin6_scope_id) { 395 /* boundary check */ 396 if (dstsock->sin6_scope_id < 0 397 || if_index < dstsock->sin6_scope_id) { 398 error = ENXIO; /* XXX EINVAL? */ 399 goto bad; 400 } 401 ip6->ip6_dst.s6_addr16[1] 402 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 403 } 404 } 405 406 /* 407 * Source address selection. 408 */ 409 { 410 struct in6_addr *in6a; 411 412 if ((in6a = in6_selectsrc(dstsock, optp, 413 in6p->in6p_moptions, 414 &in6p->in6p_route, 415 &in6p->in6p_laddr, 416 &error, NULL)) == NULL) { 417 if (error == 0) 418 error = EADDRNOTAVAIL; 419 goto bad; 420 } 421 ip6->ip6_src = *in6a; 422 if (in6p->in6p_route.ro_rt) 423 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 424 } 425 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 426 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 427 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 428 (IPV6_VERSION & IPV6_VERSION_MASK); 429 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 430 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 431 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 432 433 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 434 in6p->in6p_cksum != -1) { 435 struct mbuf *n; 436 int off; 437 u_int16_t *p; 438 439 /* compute checksum */ 440 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 441 off = offsetof(struct icmp6_hdr, icmp6_cksum); 442 else 443 off = in6p->in6p_cksum; 444 if (plen < off + 1) { 445 error = EINVAL; 446 goto bad; 447 } 448 off += sizeof(struct ip6_hdr); 449 450 n = m; 451 while (n && n->m_len <= off) { 452 off -= n->m_len; 453 n = n->m_next; 454 } 455 if (!n) 456 goto bad; 457 p = (u_int16_t *)(mtod(n, caddr_t) + off); 458 *p = 0; 459 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 460 } 461 462 error = ip6_output(m, optp, &in6p->in6p_route, 0, 463 in6p->in6p_moptions, &oifp, in6p); 464 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 465 if (oifp) 466 icmp6_ifoutstat_inc(oifp, type, code); 467 icmp6stat.icp6s_outhist[type]++; 468 } else 469 rip6stat.rip6s_opackets++; 470 471 goto freectl; 472 473 bad: 474 if (m) 475 m_freem(m); 476 477 freectl: 478 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 479 RTFREE(optp->ip6po_route.ro_rt); 480 if (control) { 481 if (optp == &opt) 482 ip6_clearpktopts(optp, -1); 483 m_freem(control); 484 } 485 return (error); 486 } 487 488 /* 489 * Raw IPv6 socket option processing. 490 */ 491 int 492 rip6_ctloutput(struct socket *so, struct sockopt *sopt) 493 { 494 int error; 495 496 if (sopt->sopt_level == IPPROTO_ICMPV6) 497 /* 498 * XXX: is it better to call icmp6_ctloutput() directly 499 * from protosw? 500 */ 501 return (icmp6_ctloutput(so, sopt)); 502 else if (sopt->sopt_level != IPPROTO_IPV6) 503 return (EINVAL); 504 505 error = 0; 506 507 switch (sopt->sopt_dir) { 508 case SOPT_GET: 509 switch (sopt->sopt_name) { 510 case MRT6_INIT: 511 case MRT6_DONE: 512 case MRT6_ADD_MIF: 513 case MRT6_DEL_MIF: 514 case MRT6_ADD_MFC: 515 case MRT6_DEL_MFC: 516 case MRT6_PIM: 517 error = ip6_mrouter_get(so, sopt); 518 break; 519 case IPV6_CHECKSUM: 520 error = ip6_raw_ctloutput(so, sopt); 521 break; 522 default: 523 error = ip6_ctloutput(so, sopt); 524 break; 525 } 526 break; 527 528 case SOPT_SET: 529 switch (sopt->sopt_name) { 530 case MRT6_INIT: 531 case MRT6_DONE: 532 case MRT6_ADD_MIF: 533 case MRT6_DEL_MIF: 534 case MRT6_ADD_MFC: 535 case MRT6_DEL_MFC: 536 case MRT6_PIM: 537 error = ip6_mrouter_set(so, sopt); 538 break; 539 case IPV6_CHECKSUM: 540 error = ip6_raw_ctloutput(so, sopt); 541 break; 542 default: 543 error = ip6_ctloutput(so, sopt); 544 break; 545 } 546 break; 547 } 548 549 return (error); 550 } 551 552 static int 553 rip6_attach(struct socket *so, int proto, struct pru_attach_info *ai) 554 { 555 struct inpcb *inp; 556 int error; 557 int flag; 558 559 if (jailed(ai->p_ucred) && jail_allow_raw_sockets) 560 flag = NULL_CRED_OKAY | PRISON_ROOT; 561 else 562 flag = NULL_CRED_OKAY; 563 564 inp = so->so_pcb; 565 if (inp) 566 panic("rip6_attach"); 567 if ((error = suser_cred(ai->p_ucred, flag)) != 0) 568 return error; 569 570 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 571 if (error) 572 return error; 573 crit_enter(); 574 error = in_pcballoc(so, &ripcbinfo); 575 crit_exit(); 576 if (error) 577 return error; 578 inp = (struct inpcb *)so->so_pcb; 579 inp->inp_vflag |= INP_IPV6; 580 inp->in6p_ip6_nxt = (long)proto; 581 inp->in6p_hops = -1; /* use kernel default */ 582 inp->in6p_cksum = -1; 583 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 584 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 585 if (inp->in6p_icmp6filt != NULL) 586 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 587 return 0; 588 } 589 590 static int 591 rip6_detach(struct socket *so) 592 { 593 struct inpcb *inp; 594 595 inp = so->so_pcb; 596 if (inp == NULL) 597 panic("rip6_detach"); 598 /* xxx: RSVP */ 599 if (so == ip6_mrouter) 600 ip6_mrouter_done(); 601 if (inp->in6p_icmp6filt) { 602 FREE(inp->in6p_icmp6filt, M_PCB); 603 inp->in6p_icmp6filt = NULL; 604 } 605 in6_pcbdetach(inp); 606 return 0; 607 } 608 609 static int 610 rip6_abort(struct socket *so) 611 { 612 soisdisconnected(so); 613 return rip6_detach(so); 614 } 615 616 static int 617 rip6_disconnect(struct socket *so) 618 { 619 struct inpcb *inp = so->so_pcb; 620 621 if (!(so->so_state & SS_ISCONNECTED)) 622 return ENOTCONN; 623 inp->in6p_faddr = kin6addr_any; 624 return rip6_abort(so); 625 } 626 627 static int 628 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 629 { 630 struct inpcb *inp = so->so_pcb; 631 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 632 struct ifaddr *ia = NULL; 633 634 if (nam->sa_len != sizeof(*addr)) 635 return EINVAL; 636 637 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 638 return EADDRNOTAVAIL; 639 #ifdef ENABLE_DEFAULT_SCOPE 640 if (addr->sin6_scope_id == 0) { /* not change if specified */ 641 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 642 } 643 #endif 644 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 645 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 646 return EADDRNOTAVAIL; 647 if (ia && 648 ((struct in6_ifaddr *)ia)->ia6_flags & 649 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 650 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 651 return (EADDRNOTAVAIL); 652 } 653 inp->in6p_laddr = addr->sin6_addr; 654 return 0; 655 } 656 657 static int 658 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 659 { 660 struct inpcb *inp = so->so_pcb; 661 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 662 struct in6_addr *in6a = NULL; 663 int error = 0; 664 #ifdef ENABLE_DEFAULT_SCOPE 665 struct sockaddr_in6 tmp; 666 #endif 667 668 if (nam->sa_len != sizeof(*addr)) 669 return EINVAL; 670 if (TAILQ_EMPTY(&ifnet)) 671 return EADDRNOTAVAIL; 672 if (addr->sin6_family != AF_INET6) 673 return EAFNOSUPPORT; 674 #ifdef ENABLE_DEFAULT_SCOPE 675 if (addr->sin6_scope_id == 0) { /* not change if specified */ 676 /* avoid overwrites */ 677 tmp = *addr; 678 addr = &tmp; 679 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 680 } 681 #endif 682 /* Source address selection. XXX: need pcblookup? */ 683 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 684 inp->in6p_moptions, &inp->in6p_route, 685 &inp->in6p_laddr, &error, NULL); 686 if (in6a == NULL) 687 return (error ? error : EADDRNOTAVAIL); 688 inp->in6p_laddr = *in6a; 689 inp->in6p_faddr = addr->sin6_addr; 690 soisconnected(so); 691 return 0; 692 } 693 694 static int 695 rip6_shutdown(struct socket *so) 696 { 697 socantsendmore(so); 698 return 0; 699 } 700 701 static int 702 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 703 struct mbuf *control, struct thread *td) 704 { 705 struct inpcb *inp = so->so_pcb; 706 struct sockaddr_in6 tmp; 707 struct sockaddr_in6 *dst; 708 709 /* always copy sockaddr to avoid overwrites */ 710 if (so->so_state & SS_ISCONNECTED) { 711 if (nam) { 712 m_freem(m); 713 return EISCONN; 714 } 715 /* XXX */ 716 bzero(&tmp, sizeof(tmp)); 717 tmp.sin6_family = AF_INET6; 718 tmp.sin6_len = sizeof(struct sockaddr_in6); 719 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 720 sizeof(struct in6_addr)); 721 dst = &tmp; 722 } else { 723 if (nam == NULL) { 724 m_freem(m); 725 return ENOTCONN; 726 } 727 tmp = *(struct sockaddr_in6 *)nam; 728 dst = &tmp; 729 } 730 #ifdef ENABLE_DEFAULT_SCOPE 731 if (dst->sin6_scope_id == 0) { /* not change if specified */ 732 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 733 } 734 #endif 735 return rip6_output(m, so, dst, control); 736 } 737 738 struct pr_usrreqs rip6_usrreqs = { 739 .pru_abort = rip6_abort, 740 .pru_accept = pru_accept_notsupp, 741 .pru_attach = rip6_attach, 742 .pru_bind = rip6_bind, 743 .pru_connect = rip6_connect, 744 .pru_connect2 = pru_connect2_notsupp, 745 .pru_control = in6_control, 746 .pru_detach = rip6_detach, 747 .pru_disconnect = rip6_disconnect, 748 .pru_listen = pru_listen_notsupp, 749 .pru_peeraddr = in6_setpeeraddr, 750 .pru_rcvd = pru_rcvd_notsupp, 751 .pru_rcvoob = pru_rcvoob_notsupp, 752 .pru_send = rip6_send, 753 .pru_sense = pru_sense_null, 754 .pru_shutdown = rip6_shutdown, 755 .pru_sockaddr = in6_setsockaddr, 756 .pru_sosend = sosend, 757 .pru_soreceive = soreceive, 758 .pru_sopoll = sopoll 759 }; 760