raw_ip6.c revision 83366
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: head/sys/netinet6/raw_ip6.c 83366 2001-09-12 08:38:13Z julian $ 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/malloc.h> 72#include <sys/proc.h> 73#include <sys/mbuf.h> 74#include <sys/socket.h> 75#include <sys/protosw.h> 76#include <sys/socketvar.h> 77#include <sys/errno.h> 78#include <sys/systm.h> 79 80#include <net/if.h> 81#include <net/route.h> 82#include <net/if_types.h> 83 84#include <netinet/in.h> 85#include <netinet/in_var.h> 86#include <netinet/in_systm.h> 87#include <netinet/ip6.h> 88#include <netinet6/ip6_var.h> 89#include <netinet6/ip6_mroute.h> 90#include <netinet/icmp6.h> 91#include <netinet/in_pcb.h> 92#include <netinet6/in6_pcb.h> 93#include <netinet6/nd6.h> 94#include <netinet6/ip6protosw.h> 95#ifdef ENABLE_DEFAULT_SCOPE 96#include <netinet6/scope6_var.h> 97#endif 98#include <netinet6/raw_ip6.h> 99 100#ifdef IPSEC 101#include <netinet6/ipsec.h> 102#include <netinet6/ipsec6.h> 103#endif /*IPSEC*/ 104 105#include <machine/stdarg.h> 106 107#include "faith.h" 108#if defined(NFAITH) && 0 < NFAITH 109#include <net/if_faith.h> 110#endif 111 112#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 113#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 114 115/* 116 * Raw interface to IP6 protocol. 117 */ 118 119extern struct inpcbhead ripcb; 120extern struct inpcbinfo ripcbinfo; 121extern u_long rip_sendspace; 122extern u_long rip_recvspace; 123 124struct 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 */ 131int 132rip6_input(mp, offp, proto) 133 struct mbuf **mp; 134 int *offp, proto; 135{ 136 struct mbuf *m = *mp; 137 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 138 register 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 defined(NFAITH) && 0 < NFAITH 146 if (faithprefix(&ip6->ip6_dst)) { 147 /* XXX send icmp6 host/port unreach? */ 148 m_freem(m); 149 return IPPROTO_DONE; 150 } 151#endif 152 153 init_sin6(&rip6src, m); /* general init */ 154 155 LIST_FOREACH(in6p, &ripcb, inp_list) { 156 if ((in6p->in6p_vflag & INP_IPV6) == 0) 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 if (n) { 189 if (last->in6p_flags & IN6P_CONTROLOPTS || 190 last->in6p_socket->so_options & SO_TIMESTAMP) 191 ip6_savecontrol(last, &opts, ip6, n); 192 /* strip intermediate headers */ 193 m_adj(n, *offp); 194 if (sbappendaddr(&last->in6p_socket->so_rcv, 195 (struct sockaddr *)&rip6src, 196 n, opts) == 0) { 197 m_freem(n); 198 if (opts) 199 m_freem(opts); 200 rip6stat.rip6s_fullsock++; 201 } else 202 sorwakeup(last->in6p_socket); 203 opts = NULL; 204 } 205 } 206 last = in6p; 207 } 208#ifdef IPSEC 209 /* 210 * Check AH/ESP integrity. 211 */ 212 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 213 m_freem(m); 214 ipsec6stat.in_polvio++; 215 ip6stat.ip6s_delivered--; 216 /* do not inject data into pcb */ 217 } else 218#endif /*IPSEC*/ 219 if (last) { 220 if (last->in6p_flags & IN6P_CONTROLOPTS || 221 last->in6p_socket->so_options & SO_TIMESTAMP) 222 ip6_savecontrol(last, &opts, ip6, m); 223 /* strip intermediate headers */ 224 m_adj(m, *offp); 225 if (sbappendaddr(&last->in6p_socket->so_rcv, 226 (struct sockaddr *)&rip6src, m, opts) == 0) { 227 m_freem(m); 228 if (opts) 229 m_freem(opts); 230 rip6stat.rip6s_fullsock++; 231 } else 232 sorwakeup(last->in6p_socket); 233 } else { 234 rip6stat.rip6s_nosock++; 235 if (m->m_flags & M_MCAST) 236 rip6stat.rip6s_nosockmcast++; 237 if (proto == IPPROTO_NONE) 238 m_freem(m); 239 else { 240 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 241 icmp6_error(m, ICMP6_PARAM_PROB, 242 ICMP6_PARAMPROB_NEXTHEADER, 243 prvnxtp - mtod(m, char *)); 244 } 245 ip6stat.ip6s_delivered--; 246 } 247 return IPPROTO_DONE; 248} 249 250void 251rip6_ctlinput(cmd, sa, d) 252 int cmd; 253 struct sockaddr *sa; 254 void *d; 255{ 256 struct ip6_hdr *ip6; 257 struct mbuf *m; 258 int off = 0; 259 struct ip6ctlparam *ip6cp = NULL; 260 const struct sockaddr_in6 *sa6_src = NULL; 261 void (*notify) __P((struct inpcb *, int)) = in6_rtchange; 262 263 if (sa->sa_family != AF_INET6 || 264 sa->sa_len != sizeof(struct sockaddr_in6)) 265 return; 266 267 if ((unsigned)cmd >= PRC_NCMDS) 268 return; 269 if (PRC_IS_REDIRECT(cmd)) 270 notify = in6_rtchange, d = NULL; 271 else if (cmd == PRC_HOSTDEAD) 272 d = NULL; 273 else if (inet6ctlerrmap[cmd] == 0) 274 return; 275 276 /* if the parameter is from icmp6, decode it. */ 277 if (d != NULL) { 278 ip6cp = (struct ip6ctlparam *)d; 279 m = ip6cp->ip6c_m; 280 ip6 = ip6cp->ip6c_ip6; 281 off = ip6cp->ip6c_off; 282 sa6_src = ip6cp->ip6c_src; 283 } else { 284 m = NULL; 285 ip6 = NULL; 286 sa6_src = &sa6_any; 287 } 288 289 (void) in6_pcbnotify(&ripcb, sa, 0, (struct sockaddr *)sa6_src, 290 0, cmd, notify); 291} 292 293/* 294 * Generate IPv6 header and pass packet to ip6_output. 295 * Tack on options user may have setup with control call. 296 */ 297int 298#if __STDC__ 299rip6_output(struct mbuf *m, ...) 300#else 301rip6_output(m, va_alist) 302 struct mbuf *m; 303 va_dcl 304#endif 305{ 306 struct socket *so; 307 struct sockaddr_in6 *dstsock; 308 struct mbuf *control; 309 struct in6_addr *dst; 310 struct ip6_hdr *ip6; 311 struct inpcb *in6p; 312 u_int plen = m->m_pkthdr.len; 313 int error = 0; 314 struct ip6_pktopts opt, *optp = 0; 315 struct ifnet *oifp = NULL; 316 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 317 int priv = 0; 318 va_list ap; 319 320 va_start(ap, m); 321 so = va_arg(ap, struct socket *); 322 dstsock = va_arg(ap, struct sockaddr_in6 *); 323 control = va_arg(ap, struct mbuf *); 324 va_end(ap); 325 326 in6p = sotoin6pcb(so); 327 328 priv = 0; 329 if (so->so_cred->cr_uid == 0) 330 priv = 1; 331 dst = &dstsock->sin6_addr; 332 if (control) { 333 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 334 goto bad; 335 optp = &opt; 336 } else 337 optp = in6p->in6p_outputopts; 338 339 /* 340 * For an ICMPv6 packet, we should know its type and code 341 * to update statistics. 342 */ 343 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 344 struct icmp6_hdr *icmp6; 345 if (m->m_len < sizeof(struct icmp6_hdr) && 346 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 347 error = ENOBUFS; 348 goto bad; 349 } 350 icmp6 = mtod(m, struct icmp6_hdr *); 351 type = icmp6->icmp6_type; 352 code = icmp6->icmp6_code; 353 } 354 355 M_PREPEND(m, sizeof(*ip6), M_TRYWAIT); 356 ip6 = mtod(m, struct ip6_hdr *); 357 358 /* 359 * Next header might not be ICMP6 but use its pseudo header anyway. 360 */ 361 ip6->ip6_dst = *dst; 362 363 /* 364 * If the scope of the destination is link-local, embed the interface 365 * index in the address. 366 * 367 * XXX advanced-api value overrides sin6_scope_id 368 */ 369 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 370 struct in6_pktinfo *pi; 371 372 /* 373 * XXX Boundary check is assumed to be already done in 374 * ip6_setpktoptions(). 375 */ 376 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 377 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 378 oifp = ifnet_byindex(pi->ipi6_ifindex); 379 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 380 in6p->in6p_moptions && 381 in6p->in6p_moptions->im6o_multicast_ifp) { 382 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 383 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 384 } else if (dstsock->sin6_scope_id) { 385 /* boundary check */ 386 if (dstsock->sin6_scope_id < 0 387 || if_index < dstsock->sin6_scope_id) { 388 error = ENXIO; /* XXX EINVAL? */ 389 goto bad; 390 } 391 ip6->ip6_dst.s6_addr16[1] 392 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 393 } 394 } 395 396 /* 397 * Source address selection. 398 */ 399 { 400 struct in6_addr *in6a; 401 402 if ((in6a = in6_selectsrc(dstsock, optp, 403 in6p->in6p_moptions, 404 &in6p->in6p_route, 405 &in6p->in6p_laddr, 406 &error)) == 0) { 407 if (error == 0) 408 error = EADDRNOTAVAIL; 409 goto bad; 410 } 411 ip6->ip6_src = *in6a; 412 if (in6p->in6p_route.ro_rt) 413 oifp = ifnet_byindex(in6p->in6p_route.ro_rt->rt_ifp->if_index); 414 } 415 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 416 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 417 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 418 (IPV6_VERSION & IPV6_VERSION_MASK); 419 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 420 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 421 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 422 423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 424 in6p->in6p_cksum != -1) { 425 struct mbuf *n; 426 int off; 427 u_int16_t *p; 428 429 /* compute checksum */ 430 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 431 off = offsetof(struct icmp6_hdr, icmp6_cksum); 432 else 433 off = in6p->in6p_cksum; 434 if (plen < off + 1) { 435 error = EINVAL; 436 goto bad; 437 } 438 off += sizeof(struct ip6_hdr); 439 440 n = m; 441 while (n && n->m_len <= off) { 442 off -= n->m_len; 443 n = n->m_next; 444 } 445 if (!n) 446 goto bad; 447 p = (u_int16_t *)(mtod(n, caddr_t) + off); 448 *p = 0; 449 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 450 } 451 452#ifdef IPSEC 453 if (ipsec_setsocket(m, so) != 0) { 454 error = ENOBUFS; 455 goto bad; 456 } 457#endif /*IPSEC*/ 458 459 error = ip6_output(m, optp, &in6p->in6p_route, 0, 460 in6p->in6p_moptions, &oifp); 461 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 462 if (oifp) 463 icmp6_ifoutstat_inc(oifp, type, code); 464 icmp6stat.icp6s_outhist[type]++; 465 } else 466 rip6stat.rip6s_opackets++; 467 468 goto freectl; 469 470 bad: 471 if (m) 472 m_freem(m); 473 474 freectl: 475 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 476 RTFREE(optp->ip6po_route.ro_rt); 477 if (control) { 478 if (optp == &opt) 479 ip6_clearpktopts(optp, 0, -1); 480 m_freem(control); 481 } 482 return(error); 483} 484 485/* 486 * Raw IPv6 socket option processing. 487 */ 488int 489rip6_ctloutput(so, sopt) 490 struct socket *so; 491 struct sockopt *sopt; 492{ 493 int error; 494 495 if (sopt->sopt_level == IPPROTO_ICMPV6) 496 /* 497 * XXX: is it better to call icmp6_ctloutput() directly 498 * from protosw? 499 */ 500 return(icmp6_ctloutput(so, sopt)); 501 else if (sopt->sopt_level != IPPROTO_IPV6) 502 return (EINVAL); 503 504 error = 0; 505 506 switch (sopt->sopt_dir) { 507 case SOPT_GET: 508 switch (sopt->sopt_name) { 509 case MRT6_INIT: 510 case MRT6_DONE: 511 case MRT6_ADD_MIF: 512 case MRT6_DEL_MIF: 513 case MRT6_ADD_MFC: 514 case MRT6_DEL_MFC: 515 case MRT6_PIM: 516 error = ip6_mrouter_get(so, sopt); 517 break; 518 default: 519 error = ip6_ctloutput(so, sopt); 520 break; 521 } 522 break; 523 524 case SOPT_SET: 525 switch (sopt->sopt_name) { 526 case MRT6_INIT: 527 case MRT6_DONE: 528 case MRT6_ADD_MIF: 529 case MRT6_DEL_MIF: 530 case MRT6_ADD_MFC: 531 case MRT6_DEL_MFC: 532 case MRT6_PIM: 533 error = ip6_mrouter_set(so, sopt); 534 break; 535 default: 536 error = ip6_ctloutput(so, sopt); 537 break; 538 } 539 break; 540 } 541 542 return (error); 543} 544 545static int 546rip6_attach(struct socket *so, int proto, struct thread *td) 547{ 548 struct inpcb *inp; 549 int error, s; 550 551 inp = sotoinpcb(so); 552 if (inp) 553 panic("rip6_attach"); 554 if (td && (error = suser_td(td)) != 0) 555 return error; 556 557 error = soreserve(so, rip_sendspace, rip_recvspace); 558 if (error) 559 return error; 560 s = splnet(); 561 error = in_pcballoc(so, &ripcbinfo, td); 562 splx(s); 563 if (error) 564 return error; 565 inp = (struct inpcb *)so->so_pcb; 566 inp->inp_vflag |= INP_IPV6; 567 inp->in6p_ip6_nxt = (long)proto; 568 inp->in6p_hops = -1; /* use kernel default */ 569 inp->in6p_cksum = -1; 570 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 571 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 572 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 573 return 0; 574} 575 576static int 577rip6_detach(struct socket *so) 578{ 579 struct inpcb *inp; 580 581 inp = sotoinpcb(so); 582 if (inp == 0) 583 panic("rip6_detach"); 584 /* xxx: RSVP */ 585 if (so == ip6_mrouter) 586 ip6_mrouter_done(); 587 if (inp->in6p_icmp6filt) { 588 FREE(inp->in6p_icmp6filt, M_PCB); 589 inp->in6p_icmp6filt = NULL; 590 } 591 in6_pcbdetach(inp); 592 return 0; 593} 594 595static int 596rip6_abort(struct socket *so) 597{ 598 soisdisconnected(so); 599 return rip6_detach(so); 600} 601 602static int 603rip6_disconnect(struct socket *so) 604{ 605 struct inpcb *inp = sotoinpcb(so); 606 607 if ((so->so_state & SS_ISCONNECTED) == 0) 608 return ENOTCONN; 609 inp->in6p_faddr = in6addr_any; 610 return rip6_abort(so); 611} 612 613static int 614rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 615{ 616 struct inpcb *inp = sotoinpcb(so); 617 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 618 struct ifaddr *ia = NULL; 619 620 if (nam->sa_len != sizeof(*addr)) 621 return EINVAL; 622 623 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 624 return EADDRNOTAVAIL; 625#ifdef ENABLE_DEFAULT_SCOPE 626 if (addr->sin6_scope_id == 0) { /* not change if specified */ 627 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 628 } 629#endif 630 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 631 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 632 return EADDRNOTAVAIL; 633 if (ia && 634 ((struct in6_ifaddr *)ia)->ia6_flags & 635 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 636 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 637 return(EADDRNOTAVAIL); 638 } 639 inp->in6p_laddr = addr->sin6_addr; 640 return 0; 641} 642 643static int 644rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 645{ 646 struct inpcb *inp = sotoinpcb(so); 647 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 648 struct in6_addr *in6a = NULL; 649 int error = 0; 650#ifdef ENABLE_DEFAULT_SCOPE 651 struct sockaddr_in6 tmp; 652#endif 653 654 if (nam->sa_len != sizeof(*addr)) 655 return EINVAL; 656 if (TAILQ_EMPTY(&ifnet)) 657 return EADDRNOTAVAIL; 658 if (addr->sin6_family != AF_INET6) 659 return EAFNOSUPPORT; 660#ifdef ENABLE_DEFAULT_SCOPE 661 if (addr->sin6_scope_id == 0) { /* not change if specified */ 662 /* avoid overwrites */ 663 tmp = *addr; 664 addr = &tmp; 665 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 666 } 667#endif 668 /* Source address selection. XXX: need pcblookup? */ 669 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 670 inp->in6p_moptions, &inp->in6p_route, 671 &inp->in6p_laddr, &error); 672 if (in6a == NULL) 673 return (error ? error : EADDRNOTAVAIL); 674 inp->in6p_laddr = *in6a; 675 inp->in6p_faddr = addr->sin6_addr; 676 soisconnected(so); 677 return 0; 678} 679 680static int 681rip6_shutdown(struct socket *so) 682{ 683 socantsendmore(so); 684 return 0; 685} 686 687static int 688rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 689 struct mbuf *control, struct thread *td) 690{ 691 struct inpcb *inp = sotoinpcb(so); 692 struct sockaddr_in6 tmp; 693 struct sockaddr_in6 *dst; 694 695 /* always copy sockaddr to avoid overwrites */ 696 if (so->so_state & SS_ISCONNECTED) { 697 if (nam) { 698 m_freem(m); 699 return EISCONN; 700 } 701 /* XXX */ 702 bzero(&tmp, sizeof(tmp)); 703 tmp.sin6_family = AF_INET6; 704 tmp.sin6_len = sizeof(struct sockaddr_in6); 705 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 706 sizeof(struct in6_addr)); 707 dst = &tmp; 708 } else { 709 if (nam == NULL) { 710 m_freem(m); 711 return ENOTCONN; 712 } 713 tmp = *(struct sockaddr_in6 *)nam; 714 dst = &tmp; 715 } 716#ifdef ENABLE_DEFAULT_SCOPE 717 if (dst->sin6_scope_id == 0) { /* not change if specified */ 718 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 719 } 720#endif 721 return rip6_output(m, so, dst, control); 722} 723 724struct pr_usrreqs rip6_usrreqs = { 725 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 726 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 727 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 728 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 729 in6_setsockaddr, sosend, soreceive, sopoll 730}; 731