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/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 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 108 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 109 110 /* 111 * Raw interface to IP6 protocol. 112 */ 113 114 extern struct inpcbhead ripcb; 115 extern struct inpcbinfo ripcbinfo; 116 extern u_long rip_sendspace; 117 extern u_long rip_recvspace; 118 119 struct rip6stat rip6stat; 120 121 /* 122 * Setup generic address and protocol structures 123 * for raw_input routine, then pass them along with 124 * mbuf chain. 125 */ 126 int 127 rip6_input(mp, offp, proto) 128 struct mbuf **mp; 129 int *offp, proto; 130 { 131 struct mbuf *m = *mp; 132 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 133 register struct inpcb *in6p; 134 struct inpcb *last = 0; 135 struct mbuf *opts = NULL; 136 struct sockaddr_in6 rip6src; 137 138 rip6stat.rip6s_ipackets++; 139 140 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 141 /* XXX send icmp6 host/port unreach? */ 142 m_freem(m); 143 return IPPROTO_DONE; 144 } 145 146 init_sin6(&rip6src, m); /* general init */ 147 148 LIST_FOREACH(in6p, &ripcb, inp_list) { 149 if ((in6p->in6p_vflag & INP_IPV6) == 0) 150 continue; 151 if (in6p->in6p_ip6_nxt && 152 in6p->in6p_ip6_nxt != proto) 153 continue; 154 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 155 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 156 continue; 157 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 158 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 159 continue; 160 if (in6p->in6p_cksum != -1) { 161 rip6stat.rip6s_isum++; 162 if (in6_cksum(m, ip6->ip6_nxt, *offp, 163 m->m_pkthdr.len - *offp)) { 164 rip6stat.rip6s_badsum++; 165 continue; 166 } 167 } 168 if (last) { 169 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 170 171 #ifdef IPSEC 172 /* 173 * Check AH/ESP integrity. 174 */ 175 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 176 m_freem(n); 177 ipsec6stat.in_polvio++; 178 /* do not inject data into pcb */ 179 } else 180 #endif /*IPSEC*/ 181 if (n) { 182 if (last->in6p_flags & IN6P_CONTROLOPTS || 183 last->in6p_socket->so_options & SO_TIMESTAMP) 184 ip6_savecontrol(last, &opts, ip6, n); 185 /* strip intermediate headers */ 186 m_adj(n, *offp); 187 if (sbappendaddr(&last->in6p_socket->so_rcv, 188 (struct sockaddr *)&rip6src, 189 n, opts) == 0) { 190 m_freem(n); 191 if (opts) 192 m_freem(opts); 193 rip6stat.rip6s_fullsock++; 194 } else 195 sorwakeup(last->in6p_socket); 196 opts = NULL; 197 } 198 } 199 last = in6p; 200 } 201 #ifdef IPSEC 202 /* 203 * Check AH/ESP integrity. 204 */ 205 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 206 m_freem(m); 207 ipsec6stat.in_polvio++; 208 ip6stat.ip6s_delivered--; 209 /* do not inject data into pcb */ 210 } else 211 #endif /*IPSEC*/ 212 if (last) { 213 if (last->in6p_flags & IN6P_CONTROLOPTS || 214 last->in6p_socket->so_options & SO_TIMESTAMP) 215 ip6_savecontrol(last, &opts, ip6, m); 216 /* strip intermediate headers */ 217 m_adj(m, *offp); 218 if (sbappendaddr(&last->in6p_socket->so_rcv, 219 (struct sockaddr *)&rip6src, m, opts) == 0) { 220 m_freem(m); 221 if (opts) 222 m_freem(opts); 223 rip6stat.rip6s_fullsock++; 224 } else 225 sorwakeup(last->in6p_socket); 226 } else { 227 rip6stat.rip6s_nosock++; 228 if (m->m_flags & M_MCAST) 229 rip6stat.rip6s_nosockmcast++; 230 if (proto == IPPROTO_NONE) 231 m_freem(m); 232 else { 233 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 234 icmp6_error(m, ICMP6_PARAM_PROB, 235 ICMP6_PARAMPROB_NEXTHEADER, 236 prvnxtp - mtod(m, char *)); 237 } 238 ip6stat.ip6s_delivered--; 239 } 240 return IPPROTO_DONE; 241 } 242 243 void 244 rip6_ctlinput(cmd, sa, d) 245 int cmd; 246 struct sockaddr *sa; 247 void *d; 248 { 249 struct ip6_hdr *ip6; 250 struct mbuf *m; 251 int off = 0; 252 struct ip6ctlparam *ip6cp = NULL; 253 const struct sockaddr_in6 *sa6_src = NULL; 254 void (*notify) __P((struct inpcb *, int)) = in6_rtchange; 255 256 if (sa->sa_family != AF_INET6 || 257 sa->sa_len != sizeof(struct sockaddr_in6)) 258 return; 259 260 if ((unsigned)cmd >= PRC_NCMDS) 261 return; 262 if (PRC_IS_REDIRECT(cmd)) 263 notify = in6_rtchange, d = NULL; 264 else if (cmd == PRC_HOSTDEAD) 265 d = NULL; 266 else if (inet6ctlerrmap[cmd] == 0) 267 return; 268 269 /* if the parameter is from icmp6, decode it. */ 270 if (d != NULL) { 271 ip6cp = (struct ip6ctlparam *)d; 272 m = ip6cp->ip6c_m; 273 ip6 = ip6cp->ip6c_ip6; 274 off = ip6cp->ip6c_off; 275 sa6_src = ip6cp->ip6c_src; 276 } else { 277 m = NULL; 278 ip6 = NULL; 279 sa6_src = &sa6_any; 280 } 281 282 (void) in6_pcbnotify(&ripcb, sa, 0, (const struct sockaddr *)sa6_src, 283 0, cmd, notify); 284 } 285 286 /* 287 * Generate IPv6 header and pass packet to ip6_output. 288 * Tack on options user may have setup with control call. 289 */ 290 int 291 #if __STDC__ 292 rip6_output(struct mbuf *m, ...) 293 #else 294 rip6_output(m, va_alist) 295 struct mbuf *m; 296 va_dcl 297 #endif 298 { 299 struct socket *so; 300 struct sockaddr_in6 *dstsock; 301 struct mbuf *control; 302 struct in6_addr *dst; 303 struct ip6_hdr *ip6; 304 struct inpcb *in6p; 305 u_int plen = m->m_pkthdr.len; 306 int error = 0; 307 struct ip6_pktopts opt, *optp = 0; 308 struct ifnet *oifp = NULL; 309 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 310 int priv = 0; 311 va_list ap; 312 313 va_start(ap, m); 314 so = va_arg(ap, struct socket *); 315 dstsock = va_arg(ap, struct sockaddr_in6 *); 316 control = va_arg(ap, struct mbuf *); 317 va_end(ap); 318 319 in6p = sotoin6pcb(so); 320 321 priv = 0; 322 if (so->so_cred->cr_uid == 0) 323 priv = 1; 324 dst = &dstsock->sin6_addr; 325 if (control) { 326 if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0) 327 goto bad; 328 optp = &opt; 329 } else 330 optp = in6p->in6p_outputopts; 331 332 /* 333 * For an ICMPv6 packet, we should know its type and code 334 * to update statistics. 335 */ 336 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 337 struct icmp6_hdr *icmp6; 338 if (m->m_len < sizeof(struct icmp6_hdr) && 339 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 340 error = ENOBUFS; 341 goto bad; 342 } 343 icmp6 = mtod(m, struct icmp6_hdr *); 344 type = icmp6->icmp6_type; 345 code = icmp6->icmp6_code; 346 } 347 348 M_PREPEND(m, sizeof(*ip6), M_TRYWAIT); 349 ip6 = mtod(m, struct ip6_hdr *); 350 351 /* 352 * Next header might not be ICMP6 but use its pseudo header anyway. 353 */ 354 ip6->ip6_dst = *dst; 355 356 /* 357 * If the scope of the destination is link-local, embed the interface 358 * index in the address. 359 * 360 * XXX advanced-api value overrides sin6_scope_id 361 */ 362 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 363 struct in6_pktinfo *pi; 364 365 /* 366 * XXX Boundary check is assumed to be already done in 367 * ip6_setpktoptions(). 368 */ 369 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 370 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 371 oifp = ifnet_byindex(pi->ipi6_ifindex); 372 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 373 in6p->in6p_moptions && 374 in6p->in6p_moptions->im6o_multicast_ifp) { 375 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 376 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 377 } else if (dstsock->sin6_scope_id) { 378 /* boundary check */ 379 if (dstsock->sin6_scope_id < 0 380 || if_index < dstsock->sin6_scope_id) { 381 error = ENXIO; /* XXX EINVAL? */ 382 goto bad; 383 } 384 ip6->ip6_dst.s6_addr16[1] 385 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 386 } 387 } 388 389 /* 390 * Source address selection. 391 */ 392 { 393 struct in6_addr *in6a; 394 395 if ((in6a = in6_selectsrc(dstsock, optp, 396 in6p->in6p_moptions, 397 &in6p->in6p_route, 398 &in6p->in6p_laddr, 399 &error)) == 0) { 400 if (error == 0) 401 error = EADDRNOTAVAIL; 402 goto bad; 403 } 404 ip6->ip6_src = *in6a; 405 if (in6p->in6p_route.ro_rt) 406 oifp = ifnet_byindex(in6p->in6p_route.ro_rt->rt_ifp->if_index); 407 } 408 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 409 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 410 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 411 (IPV6_VERSION & IPV6_VERSION_MASK); 412 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 413 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 414 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 415 416 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 417 in6p->in6p_cksum != -1) { 418 struct mbuf *n; 419 int off; 420 u_int16_t *p; 421 422 /* compute checksum */ 423 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 424 off = offsetof(struct icmp6_hdr, icmp6_cksum); 425 else 426 off = in6p->in6p_cksum; 427 if (plen < off + 1) { 428 error = EINVAL; 429 goto bad; 430 } 431 off += sizeof(struct ip6_hdr); 432 433 n = m; 434 while (n && n->m_len <= off) { 435 off -= n->m_len; 436 n = n->m_next; 437 } 438 if (!n) 439 goto bad; 440 p = (u_int16_t *)(mtod(n, caddr_t) + off); 441 *p = 0; 442 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 443 } 444 445 #ifdef IPSEC 446 if (ipsec_setsocket(m, so) != 0) { 447 error = ENOBUFS; 448 goto bad; 449 } 450 #endif /*IPSEC*/ 451 452 error = ip6_output(m, optp, &in6p->in6p_route, 0, 453 in6p->in6p_moptions, &oifp); 454 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 455 if (oifp) 456 icmp6_ifoutstat_inc(oifp, type, code); 457 icmp6stat.icp6s_outhist[type]++; 458 } else 459 rip6stat.rip6s_opackets++; 460 461 goto freectl; 462 463 bad: 464 if (m) 465 m_freem(m); 466 467 freectl: 468 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 469 RTFREE(optp->ip6po_route.ro_rt); 470 if (control) { 471 if (optp == &opt) 472 ip6_clearpktopts(optp, 0, -1); 473 m_freem(control); 474 } 475 return(error); 476 } 477 478 /* 479 * Raw IPv6 socket option processing. 480 */ 481 int 482 rip6_ctloutput(so, sopt) 483 struct socket *so; 484 struct sockopt *sopt; 485 { 486 int error; 487 488 if (sopt->sopt_level == IPPROTO_ICMPV6) 489 /* 490 * XXX: is it better to call icmp6_ctloutput() directly 491 * from protosw? 492 */ 493 return(icmp6_ctloutput(so, sopt)); 494 else if (sopt->sopt_level != IPPROTO_IPV6) 495 return (EINVAL); 496 497 error = 0; 498 499 switch (sopt->sopt_dir) { 500 case SOPT_GET: 501 switch (sopt->sopt_name) { 502 case MRT6_INIT: 503 case MRT6_DONE: 504 case MRT6_ADD_MIF: 505 case MRT6_DEL_MIF: 506 case MRT6_ADD_MFC: 507 case MRT6_DEL_MFC: 508 case MRT6_PIM: 509 error = ip6_mrouter_get(so, sopt); 510 break; 511 default: 512 error = ip6_ctloutput(so, sopt); 513 break; 514 } 515 break; 516 517 case SOPT_SET: 518 switch (sopt->sopt_name) { 519 case MRT6_INIT: 520 case MRT6_DONE: 521 case MRT6_ADD_MIF: 522 case MRT6_DEL_MIF: 523 case MRT6_ADD_MFC: 524 case MRT6_DEL_MFC: 525 case MRT6_PIM: 526 error = ip6_mrouter_set(so, sopt); 527 break; 528 default: 529 error = ip6_ctloutput(so, sopt); 530 break; 531 } 532 break; 533 } 534 535 return (error); 536 } 537 538 static int 539 rip6_attach(struct socket *so, int proto, struct thread *td) 540 { 541 struct inpcb *inp; 542 int error, s; 543 544 inp = sotoinpcb(so); 545 if (inp) 546 panic("rip6_attach"); 547 if (td && (error = suser_td(td)) != 0) 548 return error; 549 550 error = soreserve(so, rip_sendspace, rip_recvspace); 551 if (error) 552 return error; 553 s = splnet(); 554 error = in_pcballoc(so, &ripcbinfo, td); 555 splx(s); 556 if (error) 557 return error; 558 inp = (struct inpcb *)so->so_pcb; 559 inp->inp_vflag |= INP_IPV6; 560 inp->in6p_ip6_nxt = (long)proto; 561 inp->in6p_hops = -1; /* use kernel default */ 562 inp->in6p_cksum = -1; 563 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 564 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 565 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 566 return 0; 567 } 568 569 static int 570 rip6_detach(struct socket *so) 571 { 572 struct inpcb *inp; 573 574 inp = sotoinpcb(so); 575 if (inp == 0) 576 panic("rip6_detach"); 577 /* xxx: RSVP */ 578 if (so == ip6_mrouter) 579 ip6_mrouter_done(); 580 if (inp->in6p_icmp6filt) { 581 FREE(inp->in6p_icmp6filt, M_PCB); 582 inp->in6p_icmp6filt = NULL; 583 } 584 in6_pcbdetach(inp); 585 return 0; 586 } 587 588 static int 589 rip6_abort(struct socket *so) 590 { 591 soisdisconnected(so); 592 return rip6_detach(so); 593 } 594 595 static int 596 rip6_disconnect(struct socket *so) 597 { 598 struct inpcb *inp = sotoinpcb(so); 599 600 if ((so->so_state & SS_ISCONNECTED) == 0) 601 return ENOTCONN; 602 inp->in6p_faddr = in6addr_any; 603 return rip6_abort(so); 604 } 605 606 static int 607 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 608 { 609 struct inpcb *inp = sotoinpcb(so); 610 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 611 struct ifaddr *ia = NULL; 612 613 if (nam->sa_len != sizeof(*addr)) 614 return EINVAL; 615 616 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 617 return EADDRNOTAVAIL; 618 #ifdef ENABLE_DEFAULT_SCOPE 619 if (addr->sin6_scope_id == 0) { /* not change if specified */ 620 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 621 } 622 #endif 623 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 624 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 625 return EADDRNOTAVAIL; 626 if (ia && 627 ((struct in6_ifaddr *)ia)->ia6_flags & 628 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 629 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 630 return(EADDRNOTAVAIL); 631 } 632 inp->in6p_laddr = addr->sin6_addr; 633 return 0; 634 } 635 636 static int 637 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 638 { 639 struct inpcb *inp = sotoinpcb(so); 640 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 641 struct in6_addr *in6a = NULL; 642 int error = 0; 643 #ifdef ENABLE_DEFAULT_SCOPE 644 struct sockaddr_in6 tmp; 645 #endif 646 647 if (nam->sa_len != sizeof(*addr)) 648 return EINVAL; 649 if (TAILQ_EMPTY(&ifnet)) 650 return EADDRNOTAVAIL; 651 if (addr->sin6_family != AF_INET6) 652 return EAFNOSUPPORT; 653 #ifdef ENABLE_DEFAULT_SCOPE 654 if (addr->sin6_scope_id == 0) { /* not change if specified */ 655 /* avoid overwrites */ 656 tmp = *addr; 657 addr = &tmp; 658 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 659 } 660 #endif 661 /* Source address selection. XXX: need pcblookup? */ 662 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 663 inp->in6p_moptions, &inp->in6p_route, 664 &inp->in6p_laddr, &error); 665 if (in6a == NULL) 666 return (error ? error : EADDRNOTAVAIL); 667 inp->in6p_laddr = *in6a; 668 inp->in6p_faddr = addr->sin6_addr; 669 soisconnected(so); 670 return 0; 671 } 672 673 static int 674 rip6_shutdown(struct socket *so) 675 { 676 socantsendmore(so); 677 return 0; 678 } 679 680 static int 681 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 682 struct mbuf *control, struct thread *td) 683 { 684 struct inpcb *inp = sotoinpcb(so); 685 struct sockaddr_in6 tmp; 686 struct sockaddr_in6 *dst; 687 688 /* always copy sockaddr to avoid overwrites */ 689 if (so->so_state & SS_ISCONNECTED) { 690 if (nam) { 691 m_freem(m); 692 return EISCONN; 693 } 694 /* XXX */ 695 bzero(&tmp, sizeof(tmp)); 696 tmp.sin6_family = AF_INET6; 697 tmp.sin6_len = sizeof(struct sockaddr_in6); 698 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 699 sizeof(struct in6_addr)); 700 dst = &tmp; 701 } else { 702 if (nam == NULL) { 703 m_freem(m); 704 return ENOTCONN; 705 } 706 tmp = *(struct sockaddr_in6 *)nam; 707 dst = &tmp; 708 } 709 #ifdef ENABLE_DEFAULT_SCOPE 710 if (dst->sin6_scope_id == 0) { /* not change if specified */ 711 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 712 } 713 #endif 714 return rip6_output(m, so, dst, control); 715 } 716 717 struct pr_usrreqs rip6_usrreqs = { 718 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 719 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 720 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 721 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 722 in6_setsockaddr, sosend, soreceive, sopoll 723 }; 724