raw_ip6.c revision 125396
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 125396 2004-02-03 18:20:55Z ume $ 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 122extern struct inpcbhead ripcb; 123extern struct inpcbinfo ripcbinfo; 124extern u_long rip_sendspace; 125extern u_long rip_recvspace; 126 127struct 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 */ 134int 135rip6_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(n, last)) { 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(m, last)) { 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 270void 271rip6_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 */ 317int 318#if __STDC__ 319rip6_output(struct mbuf *m, ...) 320#else 321rip6_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, NULL, &in6p->in6p_laddr, &error)) == 0) { 428 if (error == 0) 429 error = EADDRNOTAVAIL; 430 goto bad; 431 } 432 ip6->ip6_src = *in6a; 433 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 434 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 435 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 436 (IPV6_VERSION & IPV6_VERSION_MASK); 437 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 438 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 439 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 440 441 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 442 in6p->in6p_cksum != -1) { 443 struct mbuf *n; 444 int off; 445 u_int16_t *p; 446 447 /* compute checksum */ 448 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 449 off = offsetof(struct icmp6_hdr, icmp6_cksum); 450 else 451 off = in6p->in6p_cksum; 452 if (plen < off + 1) { 453 error = EINVAL; 454 goto bad; 455 } 456 off += sizeof(struct ip6_hdr); 457 458 n = m; 459 while (n && n->m_len <= off) { 460 off -= n->m_len; 461 n = n->m_next; 462 } 463 if (!n) 464 goto bad; 465 p = (u_int16_t *)(mtod(n, caddr_t) + off); 466 *p = 0; 467 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 468 } 469 470 error = ip6_output(m, in6p->in6p_outputopts, NULL, 0, 471 in6p->in6p_moptions, &oifp, in6p); 472 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 473 if (oifp) 474 icmp6_ifoutstat_inc(oifp, type, code); 475 icmp6stat.icp6s_outhist[type]++; 476 } else 477 rip6stat.rip6s_opackets++; 478 479 goto freectl; 480 481 bad: 482 if (m) 483 m_freem(m); 484 485 freectl: 486 if (control) { 487 ip6_clearpktopts(in6p->in6p_outputopts, -1); 488 in6p->in6p_outputopts = stickyopt; 489 m_freem(control); 490 } 491 return (error); 492} 493 494/* 495 * Raw IPv6 socket option processing. 496 */ 497int 498rip6_ctloutput(so, sopt) 499 struct socket *so; 500 struct sockopt *sopt; 501{ 502 int error; 503 504 if (sopt->sopt_level == IPPROTO_ICMPV6) 505 /* 506 * XXX: is it better to call icmp6_ctloutput() directly 507 * from protosw? 508 */ 509 return (icmp6_ctloutput(so, sopt)); 510 else if (sopt->sopt_level != IPPROTO_IPV6) 511 return (EINVAL); 512 513 error = 0; 514 515 switch (sopt->sopt_dir) { 516 case SOPT_GET: 517 switch (sopt->sopt_name) { 518 case MRT6_INIT: 519 case MRT6_DONE: 520 case MRT6_ADD_MIF: 521 case MRT6_DEL_MIF: 522 case MRT6_ADD_MFC: 523 case MRT6_DEL_MFC: 524 case MRT6_PIM: 525 error = ip6_mrouter_get(so, sopt); 526 break; 527 case IPV6_CHECKSUM: 528 error = ip6_raw_ctloutput(so, sopt); 529 break; 530 default: 531 error = ip6_ctloutput(so, sopt); 532 break; 533 } 534 break; 535 536 case SOPT_SET: 537 switch (sopt->sopt_name) { 538 case MRT6_INIT: 539 case MRT6_DONE: 540 case MRT6_ADD_MIF: 541 case MRT6_DEL_MIF: 542 case MRT6_ADD_MFC: 543 case MRT6_DEL_MFC: 544 case MRT6_PIM: 545 error = ip6_mrouter_set(so, sopt); 546 break; 547 case IPV6_CHECKSUM: 548 error = ip6_raw_ctloutput(so, sopt); 549 break; 550 default: 551 error = ip6_ctloutput(so, sopt); 552 break; 553 } 554 break; 555 } 556 557 return (error); 558} 559 560static int 561rip6_attach(struct socket *so, int proto, struct thread *td) 562{ 563 struct inpcb *inp; 564 int error, s; 565 566 inp = sotoinpcb(so); 567 if (inp) 568 panic("rip6_attach"); 569 if (td && (error = suser(td)) != 0) 570 return error; 571 572 error = soreserve(so, rip_sendspace, rip_recvspace); 573 if (error) 574 return error; 575 s = splnet(); 576 error = in_pcballoc(so, &ripcbinfo, td, "raw6inp"); 577 splx(s); 578 if (error) 579 return error; 580 inp = (struct inpcb *)so->so_pcb; 581 inp->inp_vflag |= INP_IPV6; 582 inp->in6p_ip6_nxt = (long)proto; 583 inp->in6p_hops = -1; /* use kernel default */ 584 inp->in6p_cksum = -1; 585 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 586 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 587 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 588 return 0; 589} 590 591static int 592rip6_detach(struct socket *so) 593{ 594 struct inpcb *inp; 595 596 inp = sotoinpcb(so); 597 if (inp == 0) 598 panic("rip6_detach"); 599 /* xxx: RSVP */ 600 if (so == ip6_mrouter) 601 ip6_mrouter_done(); 602 if (inp->in6p_icmp6filt) { 603 FREE(inp->in6p_icmp6filt, M_PCB); 604 inp->in6p_icmp6filt = NULL; 605 } 606 in6_pcbdetach(inp); 607 return 0; 608} 609 610static int 611rip6_abort(struct socket *so) 612{ 613 soisdisconnected(so); 614 return rip6_detach(so); 615} 616 617static int 618rip6_disconnect(struct socket *so) 619{ 620 struct inpcb *inp = sotoinpcb(so); 621 622 if ((so->so_state & SS_ISCONNECTED) == 0) 623 return ENOTCONN; 624 inp->in6p_faddr = in6addr_any; 625 return rip6_abort(so); 626} 627 628static int 629rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 630{ 631 struct inpcb *inp = sotoinpcb(so); 632 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 633 struct ifaddr *ia = NULL; 634 635 if (nam->sa_len != sizeof(*addr)) 636 return EINVAL; 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)) == 0) 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 657static int 658rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 659{ 660 struct inpcb *inp = sotoinpcb(so); 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, NULL, 685 &inp->in6p_laddr, &error); 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 694static int 695rip6_shutdown(struct socket *so) 696{ 697 socantsendmore(so); 698 return 0; 699} 700 701static int 702rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 703 struct mbuf *control, struct thread *td) 704{ 705 struct inpcb *inp = sotoinpcb(so); 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 738struct pr_usrreqs rip6_usrreqs = { 739 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 740 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 741 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 742 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 743 in6_setsockaddr, sosend, soreceive, sopoll, pru_sosetlabel_null 744}; 745