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 * $FreeBSD$ 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #include "opt_ipsec.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/errno.h> 72 #include <sys/lock.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/proc.h> 76 #include <sys/protosw.h> 77 #include <sys/signalvar.h> 78 #include <sys/socket.h> 79 #include <sys/socketvar.h> 80 #include <sys/sx.h> 81 #include <sys/systm.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/icmp6.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/ip6.h> 93 #include <netinet6/ip6protosw.h> 94 #include <netinet6/ip6_mroute.h> 95 #include <netinet6/in6_pcb.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/nd6.h> 98 #include <netinet6/raw_ip6.h> 99 #ifdef ENABLE_DEFAULT_SCOPE 100 #include <netinet6/scope6_var.h> 101 #endif 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #include <netinet6/ipsec6.h> 106 #endif /*IPSEC*/ 107 108 #ifdef FAST_IPSEC 109 #include <netipsec/ipsec.h> 110 #include <netipsec/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 inpcbhead ripcb; 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(mp, offp, proto) 136 struct mbuf **mp; 137 int *offp, proto; 138 { 139 struct mbuf *m = *mp; 140 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141 register struct inpcb *in6p; 142 struct inpcb *last = 0; 143 struct mbuf *opts = NULL; 144 struct sockaddr_in6 fromsa; 145 146 rip6stat.rip6s_ipackets++; 147 148 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 149 /* XXX send icmp6 host/port unreach? */ 150 m_freem(m); 151 return IPPROTO_DONE; 152 } 153 154 init_sin6(&fromsa, m); /* general init */ 155 156 LIST_FOREACH(in6p, &ripcb, inp_list) { 157 if ((in6p->in6p_vflag & INP_IPV6) == 0) 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, n, &opts); 202 /* strip intermediate headers */ 203 m_adj(n, *offp); 204 if (sbappendaddr(&last->in6p_socket->so_rcv, 205 (struct sockaddr *)&fromsa, 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, m, &opts); 243 /* strip intermediate headers */ 244 m_adj(m, *offp); 245 if (sbappendaddr(&last->in6p_socket->so_rcv, 246 (struct sockaddr *)&fromsa, 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(cmd, sa, d) 272 int cmd; 273 struct sockaddr *sa; 274 void *d; 275 { 276 struct ip6_hdr *ip6; 277 struct mbuf *m; 278 int off = 0; 279 struct ip6ctlparam *ip6cp = NULL; 280 const struct sockaddr_in6 *sa6_src = NULL; 281 struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 282 283 if (sa->sa_family != AF_INET6 || 284 sa->sa_len != sizeof(struct sockaddr_in6)) 285 return; 286 287 if ((unsigned)cmd >= PRC_NCMDS) 288 return; 289 if (PRC_IS_REDIRECT(cmd)) 290 notify = in6_rtchange, d = NULL; 291 else if (cmd == PRC_HOSTDEAD) 292 d = NULL; 293 else if (inet6ctlerrmap[cmd] == 0) 294 return; 295 296 /* if the parameter is from icmp6, decode it. */ 297 if (d != NULL) { 298 ip6cp = (struct ip6ctlparam *)d; 299 m = ip6cp->ip6c_m; 300 ip6 = ip6cp->ip6c_ip6; 301 off = ip6cp->ip6c_off; 302 sa6_src = ip6cp->ip6c_src; 303 } else { 304 m = NULL; 305 ip6 = NULL; 306 sa6_src = &sa6_any; 307 } 308 309 (void) in6_pcbnotify(&ripcb, sa, 0, (const struct sockaddr *)sa6_src, 310 0, cmd, notify); 311 } 312 313 /* 314 * Generate IPv6 header and pass packet to ip6_output. 315 * Tack on options user may have setup with control call. 316 */ 317 int 318 #if __STDC__ 319 rip6_output(struct mbuf *m, ...) 320 #else 321 rip6_output(m, va_alist) 322 struct mbuf *m; 323 va_dcl 324 #endif 325 { 326 struct mbuf *control; 327 struct socket *so; 328 struct sockaddr_in6 *dstsock; 329 struct in6_addr *dst; 330 struct ip6_hdr *ip6; 331 struct inpcb *in6p; 332 u_int plen = m->m_pkthdr.len; 333 int error = 0; 334 struct ip6_pktopts opt, *stickyopt = NULL; 335 struct ifnet *oifp = NULL; 336 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 337 int priv = 0; 338 struct in6_addr *in6a; 339 va_list ap; 340 341 va_start(ap, m); 342 so = va_arg(ap, struct socket *); 343 dstsock = va_arg(ap, struct sockaddr_in6 *); 344 control = va_arg(ap, struct mbuf *); 345 va_end(ap); 346 347 in6p = sotoin6pcb(so); 348 stickyopt = in6p->in6p_outputopts; 349 350 priv = 0; 351 if (so->so_cred->cr_uid == 0) 352 priv = 1; 353 dst = &dstsock->sin6_addr; 354 if (control) { 355 if ((error = ip6_setpktoptions(control, &opt, 356 stickyopt, priv, 0, 357 so->so_proto->pr_protocol)) 358 != 0) { 359 goto bad; 360 } 361 in6p->in6p_outputopts = &opt; 362 } 363 364 /* 365 * For an ICMPv6 packet, we should know its type and code 366 * to update statistics. 367 */ 368 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 369 struct icmp6_hdr *icmp6; 370 if (m->m_len < sizeof(struct icmp6_hdr) && 371 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 372 error = ENOBUFS; 373 goto bad; 374 } 375 icmp6 = mtod(m, struct icmp6_hdr *); 376 type = icmp6->icmp6_type; 377 code = icmp6->icmp6_code; 378 } 379 380 M_PREPEND(m, sizeof(*ip6), M_TRYWAIT); 381 ip6 = mtod(m, struct ip6_hdr *); 382 383 /* 384 * Next header might not be ICMP6 but use its pseudo header anyway. 385 */ 386 ip6->ip6_dst = *dst; 387 388 /* 389 * If the scope of the destination is link-local, embed the interface 390 * index in the address. 391 * 392 * XXX advanced-api value overrides sin6_scope_id 393 */ 394 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 395 struct in6_pktinfo *pi; 396 397 /* 398 * XXX Boundary check is assumed to be already done in 399 * ip6_setpktoptions(). 400 */ 401 if (in6p->in6p_outputopts && 402 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 403 pi->ipi6_ifindex) { 404 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 405 oifp = ifnet_byindex(pi->ipi6_ifindex); 406 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 407 in6p->in6p_moptions && 408 in6p->in6p_moptions->im6o_multicast_ifp) { 409 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 410 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 411 } else if (dstsock->sin6_scope_id) { 412 /* boundary check */ 413 if (dstsock->sin6_scope_id < 0 || 414 if_index < dstsock->sin6_scope_id) { 415 error = ENXIO; /* XXX EINVAL? */ 416 goto bad; 417 } 418 ip6->ip6_dst.s6_addr16[1] = 419 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */ 420 } 421 } 422 423 /* 424 * Source address selection. 425 */ 426 if ((in6a = in6_selectsrc(dstsock, in6p->in6p_outputopts, 427 in6p->in6p_moptions, &in6p->in6p_route, &in6p->in6p_laddr, 428 &error)) == 0) { 429 if (error == 0) 430 error = EADDRNOTAVAIL; 431 goto bad; 432 } 433 ip6->ip6_src = *in6a; 434 if (in6p->in6p_route.ro_rt) 435 oifp = ifnet_byindex(in6p->in6p_route.ro_rt->rt_ifp->if_index); 436 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 437 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 438 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 439 (IPV6_VERSION & IPV6_VERSION_MASK); 440 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 441 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 442 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 443 444 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 445 in6p->in6p_cksum != -1) { 446 struct mbuf *n; 447 int off; 448 u_int16_t *p; 449 450 /* compute checksum */ 451 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 452 off = offsetof(struct icmp6_hdr, icmp6_cksum); 453 else 454 off = in6p->in6p_cksum; 455 if (plen < off + 1) { 456 error = EINVAL; 457 goto bad; 458 } 459 off += sizeof(struct ip6_hdr); 460 461 n = m; 462 while (n && n->m_len <= off) { 463 off -= n->m_len; 464 n = n->m_next; 465 } 466 if (!n) 467 goto bad; 468 p = (u_int16_t *)(mtod(n, caddr_t) + off); 469 *p = 0; 470 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 471 } 472 473 #ifdef IPSEC 474 if (ipsec_setsocket(m, so) != 0) { 475 error = ENOBUFS; 476 goto bad; 477 } 478 #endif /*IPSEC*/ 479 480 error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route, 0, 481 in6p->in6p_moptions, &oifp, in6p); 482 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 483 if (oifp) 484 icmp6_ifoutstat_inc(oifp, type, code); 485 icmp6stat.icp6s_outhist[type]++; 486 } else 487 rip6stat.rip6s_opackets++; 488 489 goto freectl; 490 491 bad: 492 if (m) 493 m_freem(m); 494 495 freectl: 496 if (control) { 497 ip6_clearpktopts(in6p->in6p_outputopts, -1); 498 in6p->in6p_outputopts = stickyopt; 499 m_freem(control); 500 } 501 return (error); 502 } 503 504 /* 505 * Raw IPv6 socket option processing. 506 */ 507 int 508 rip6_ctloutput(so, sopt) 509 struct socket *so; 510 struct sockopt *sopt; 511 { 512 int error; 513 514 if (sopt->sopt_level == IPPROTO_ICMPV6) 515 /* 516 * XXX: is it better to call icmp6_ctloutput() directly 517 * from protosw? 518 */ 519 return (icmp6_ctloutput(so, sopt)); 520 else if (sopt->sopt_level != IPPROTO_IPV6) 521 return (EINVAL); 522 523 error = 0; 524 525 switch (sopt->sopt_dir) { 526 case SOPT_GET: 527 switch (sopt->sopt_name) { 528 case MRT6_INIT: 529 case MRT6_DONE: 530 case MRT6_ADD_MIF: 531 case MRT6_DEL_MIF: 532 case MRT6_ADD_MFC: 533 case MRT6_DEL_MFC: 534 case MRT6_PIM: 535 error = ip6_mrouter_get(so, sopt); 536 break; 537 case IPV6_CHECKSUM: 538 error = ip6_raw_ctloutput(so, sopt); 539 break; 540 default: 541 error = ip6_ctloutput(so, sopt); 542 break; 543 } 544 break; 545 546 case SOPT_SET: 547 switch (sopt->sopt_name) { 548 case MRT6_INIT: 549 case MRT6_DONE: 550 case MRT6_ADD_MIF: 551 case MRT6_DEL_MIF: 552 case MRT6_ADD_MFC: 553 case MRT6_DEL_MFC: 554 case MRT6_PIM: 555 error = ip6_mrouter_set(so, sopt); 556 break; 557 case IPV6_CHECKSUM: 558 error = ip6_raw_ctloutput(so, sopt); 559 break; 560 default: 561 error = ip6_ctloutput(so, sopt); 562 break; 563 } 564 break; 565 } 566 567 return (error); 568 } 569 570 static int 571 rip6_attach(struct socket *so, int proto, struct thread *td) 572 { 573 struct inpcb *inp; 574 int error, s; 575 576 inp = sotoinpcb(so); 577 if (inp) 578 panic("rip6_attach"); 579 if (td && (error = suser(td)) != 0) 580 return error; 581 582 error = soreserve(so, rip_sendspace, rip_recvspace); 583 if (error) 584 return error; 585 s = splnet(); 586 error = in_pcballoc(so, &ripcbinfo, td); 587 splx(s); 588 if (error) 589 return error; 590 inp = (struct inpcb *)so->so_pcb; 591 inp->inp_vflag |= INP_IPV6; 592 inp->in6p_ip6_nxt = (long)proto; 593 inp->in6p_hops = -1; /* use kernel default */ 594 inp->in6p_cksum = -1; 595 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 596 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 597 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 598 return 0; 599 } 600 601 static int 602 rip6_detach(struct socket *so) 603 { 604 struct inpcb *inp; 605 606 inp = sotoinpcb(so); 607 if (inp == 0) 608 panic("rip6_detach"); 609 /* xxx: RSVP */ 610 if (so == ip6_mrouter) 611 ip6_mrouter_done(); 612 if (inp->in6p_icmp6filt) { 613 FREE(inp->in6p_icmp6filt, M_PCB); 614 inp->in6p_icmp6filt = NULL; 615 } 616 in6_pcbdetach(inp); 617 return 0; 618 } 619 620 static int 621 rip6_abort(struct socket *so) 622 { 623 soisdisconnected(so); 624 return rip6_detach(so); 625 } 626 627 static int 628 rip6_disconnect(struct socket *so) 629 { 630 struct inpcb *inp = sotoinpcb(so); 631 632 if ((so->so_state & SS_ISCONNECTED) == 0) 633 return ENOTCONN; 634 inp->in6p_faddr = in6addr_any; 635 return rip6_abort(so); 636 } 637 638 static int 639 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 640 { 641 struct inpcb *inp = sotoinpcb(so); 642 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 643 struct ifaddr *ia = NULL; 644 645 if (nam->sa_len != sizeof(*addr)) 646 return EINVAL; 647 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 648 return EADDRNOTAVAIL; 649 #ifdef ENABLE_DEFAULT_SCOPE 650 if (addr->sin6_scope_id == 0) { /* not change if specified */ 651 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 652 } 653 #endif 654 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 655 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 656 return EADDRNOTAVAIL; 657 if (ia && 658 ((struct in6_ifaddr *)ia)->ia6_flags & 659 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 660 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 661 return (EADDRNOTAVAIL); 662 } 663 inp->in6p_laddr = addr->sin6_addr; 664 return 0; 665 } 666 667 static int 668 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 669 { 670 struct inpcb *inp = sotoinpcb(so); 671 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 672 struct in6_addr *in6a = NULL; 673 int error = 0; 674 #ifdef ENABLE_DEFAULT_SCOPE 675 struct sockaddr_in6 tmp; 676 #endif 677 678 if (nam->sa_len != sizeof(*addr)) 679 return EINVAL; 680 if (TAILQ_EMPTY(&ifnet)) 681 return EADDRNOTAVAIL; 682 if (addr->sin6_family != AF_INET6) 683 return EAFNOSUPPORT; 684 #ifdef ENABLE_DEFAULT_SCOPE 685 if (addr->sin6_scope_id == 0) { /* not change if specified */ 686 /* avoid overwrites */ 687 tmp = *addr; 688 addr = &tmp; 689 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 690 } 691 #endif 692 /* Source address selection. XXX: need pcblookup? */ 693 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 694 inp->in6p_moptions, &inp->in6p_route, 695 &inp->in6p_laddr, &error); 696 if (in6a == NULL) 697 return (error ? error : EADDRNOTAVAIL); 698 inp->in6p_laddr = *in6a; 699 inp->in6p_faddr = addr->sin6_addr; 700 soisconnected(so); 701 return 0; 702 } 703 704 static int 705 rip6_shutdown(struct socket *so) 706 { 707 socantsendmore(so); 708 return 0; 709 } 710 711 static int 712 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 713 struct mbuf *control, struct thread *td) 714 { 715 struct inpcb *inp = sotoinpcb(so); 716 struct sockaddr_in6 tmp; 717 struct sockaddr_in6 *dst; 718 719 /* always copy sockaddr to avoid overwrites */ 720 if (so->so_state & SS_ISCONNECTED) { 721 if (nam) { 722 m_freem(m); 723 return EISCONN; 724 } 725 /* XXX */ 726 bzero(&tmp, sizeof(tmp)); 727 tmp.sin6_family = AF_INET6; 728 tmp.sin6_len = sizeof(struct sockaddr_in6); 729 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 730 sizeof(struct in6_addr)); 731 dst = &tmp; 732 } else { 733 if (nam == NULL) { 734 m_freem(m); 735 return ENOTCONN; 736 } 737 tmp = *(struct sockaddr_in6 *)nam; 738 dst = &tmp; 739 } 740 #ifdef ENABLE_DEFAULT_SCOPE 741 if (dst->sin6_scope_id == 0) { /* not change if specified */ 742 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 743 } 744 #endif 745 return rip6_output(m, so, dst, control); 746 } 747 748 struct pr_usrreqs rip6_usrreqs = { 749 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 750 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 751 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 752 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 753 in6_setsockaddr, sosend, soreceive, sopoll, pru_sosetlabel_null 754 }; 755