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/priv.h> 75 #include <sys/mbuf.h> 76 #include <sys/socket.h> 77 #include <sys/jail.h> 78 #include <sys/protosw.h> 79 #include <sys/socketvar.h> 80 #include <sys/errno.h> 81 #include <sys/systm.h> 82 83 #include <sys/thread2.h> 84 #include <sys/socketvar2.h> 85 #include <sys/msgport2.h> 86 87 #include <net/if.h> 88 #include <net/route.h> 89 #include <net/if_types.h> 90 91 #include <netinet/in.h> 92 #include <netinet/in_var.h> 93 #include <netinet/in_systm.h> 94 #include <netinet/ip6.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet6/ip6_mroute.h> 97 #include <netinet/icmp6.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet6/in6_pcb.h> 100 #include <netinet6/nd6.h> 101 #include <netinet6/ip6protosw.h> 102 #ifdef ENABLE_DEFAULT_SCOPE 103 #include <netinet6/scope6_var.h> 104 #endif 105 #include <netinet6/raw_ip6.h> 106 107 #ifdef IPSEC 108 #include <netinet6/ipsec.h> 109 #include <netinet6/ipsec6.h> 110 #endif /*IPSEC*/ 111 112 #ifdef FAST_IPSEC 113 #include <netproto/ipsec/ipsec.h> 114 #include <netproto/ipsec/ipsec6.h> 115 #endif /* FAST_IPSEC */ 116 117 #include <machine/stdarg.h> 118 119 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 120 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 121 122 /* 123 * Raw interface to IP6 protocol. 124 */ 125 126 extern struct inpcbinfo ripcbinfo; 127 extern u_long rip_sendspace; 128 extern u_long rip_recvspace; 129 130 struct rip6stat rip6stat; 131 132 /* 133 * Setup generic address and protocol structures 134 * for raw_input routine, then pass them along with 135 * mbuf chain. 136 */ 137 int 138 rip6_input(struct mbuf **mp, int *offp, int proto) 139 { 140 struct mbuf *m = *mp; 141 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 142 struct inpcb *in6p; 143 struct inpcb *last = 0; 144 struct mbuf *opts = NULL; 145 struct sockaddr_in6 rip6src; 146 147 rip6stat.rip6s_ipackets++; 148 149 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 150 /* XXX send icmp6 host/port unreach? */ 151 m_freem(m); 152 return IPPROTO_DONE; 153 } 154 155 init_sin6(&rip6src, m); /* general init */ 156 157 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 158 if (in6p->in6p_flags & INP_PLACEMARKER) 159 continue; 160 if (!(in6p->in6p_vflag & INP_IPV6)) 161 continue; 162 if (in6p->in6p_ip6_nxt && 163 in6p->in6p_ip6_nxt != proto) 164 continue; 165 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 166 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 167 continue; 168 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 169 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 170 continue; 171 if (in6p->in6p_cksum != -1) { 172 rip6stat.rip6s_isum++; 173 if (in6_cksum(m, ip6->ip6_nxt, *offp, 174 m->m_pkthdr.len - *offp)) { 175 rip6stat.rip6s_badsum++; 176 continue; 177 } 178 } 179 if (last) { 180 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 181 182 #ifdef IPSEC 183 /* 184 * Check AH/ESP integrity. 185 */ 186 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 187 m_freem(n); 188 ipsec6stat.in_polvio++; 189 /* do not inject data into pcb */ 190 } else 191 #endif /*IPSEC*/ 192 #ifdef FAST_IPSEC 193 /* 194 * Check AH/ESP integrity. 195 */ 196 if (n && ipsec6_in_reject(n, last)) { 197 m_freem(n); 198 /* do not inject data into pcb */ 199 } else 200 #endif /*FAST_IPSEC*/ 201 if (n) { 202 if (last->in6p_flags & IN6P_CONTROLOPTS || 203 last->in6p_socket->so_options & SO_TIMESTAMP) 204 ip6_savecontrol(last, &opts, ip6, n); 205 /* strip intermediate headers */ 206 m_adj(n, *offp); 207 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 208 (struct sockaddr *)&rip6src, 209 n, opts) == 0) { 210 m_freem(n); 211 if (opts) 212 m_freem(opts); 213 rip6stat.rip6s_fullsock++; 214 } else 215 sorwakeup(last->in6p_socket); 216 opts = NULL; 217 } 218 } 219 last = in6p; 220 } 221 #ifdef IPSEC 222 /* 223 * Check AH/ESP integrity. 224 */ 225 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 226 m_freem(m); 227 ipsec6stat.in_polvio++; 228 ip6stat.ip6s_delivered--; 229 /* do not inject data into pcb */ 230 } else 231 #endif /*IPSEC*/ 232 #ifdef FAST_IPSEC 233 /* 234 * Check AH/ESP integrity. 235 */ 236 if (last && ipsec6_in_reject(m, last)) { 237 m_freem(m); 238 ip6stat.ip6s_delivered--; 239 /* do not inject data into pcb */ 240 } else 241 #endif /*FAST_IPSEC*/ 242 if (last) { 243 if (last->in6p_flags & IN6P_CONTROLOPTS || 244 last->in6p_socket->so_options & SO_TIMESTAMP) 245 ip6_savecontrol(last, &opts, ip6, m); 246 /* strip intermediate headers */ 247 m_adj(m, *offp); 248 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 249 (struct sockaddr *)&rip6src, m, opts) == 0) { 250 m_freem(m); 251 if (opts) 252 m_freem(opts); 253 rip6stat.rip6s_fullsock++; 254 } else 255 sorwakeup(last->in6p_socket); 256 } else { 257 rip6stat.rip6s_nosock++; 258 if (m->m_flags & M_MCAST) 259 rip6stat.rip6s_nosockmcast++; 260 if (proto == IPPROTO_NONE) 261 m_freem(m); 262 else { 263 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 264 icmp6_error(m, ICMP6_PARAM_PROB, 265 ICMP6_PARAMPROB_NEXTHEADER, 266 prvnxtp - mtod(m, char *)); 267 } 268 ip6stat.ip6s_delivered--; 269 } 270 return IPPROTO_DONE; 271 } 272 273 void 274 rip6_ctlinput(netmsg_t msg) 275 { 276 int cmd = msg->ctlinput.nm_cmd; 277 struct sockaddr *sa = msg->ctlinput.nm_arg; 278 void *d = msg->ctlinput.nm_extra; 279 struct ip6_hdr *ip6; 280 struct mbuf *m; 281 int off = 0; 282 struct ip6ctlparam *ip6cp = NULL; 283 const struct sockaddr_in6 *sa6_src = NULL; 284 void (*notify) (struct inpcb *, int) = in6_rtchange; 285 286 if (sa->sa_family != AF_INET6 || 287 sa->sa_len != sizeof(struct sockaddr_in6)) 288 goto out; 289 290 if ((unsigned)cmd >= PRC_NCMDS) 291 goto out; 292 if (PRC_IS_REDIRECT(cmd)) 293 notify = in6_rtchange, d = NULL; 294 else if (cmd == PRC_HOSTDEAD) 295 d = NULL; 296 else if (inet6ctlerrmap[cmd] == 0) 297 goto out; 298 299 /* if the parameter is from icmp6, decode it. */ 300 if (d != NULL) { 301 ip6cp = (struct ip6ctlparam *)d; 302 m = ip6cp->ip6c_m; 303 ip6 = ip6cp->ip6c_ip6; 304 off = ip6cp->ip6c_off; 305 sa6_src = ip6cp->ip6c_src; 306 } else { 307 m = NULL; 308 ip6 = NULL; 309 sa6_src = &sa6_any; 310 } 311 312 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0, 313 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 314 out: 315 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 316 } 317 318 /* 319 * Generate IPv6 header and pass packet to ip6_output. 320 * Tack on options user may have setup with control call. 321 */ 322 int 323 rip6_output(struct mbuf *m, struct socket *so, ...) 324 { 325 struct sockaddr_in6 *dstsock; 326 struct mbuf *control; 327 struct in6_addr *dst; 328 struct ip6_hdr *ip6; 329 struct inpcb *in6p; 330 u_int plen = m->m_pkthdr.len; 331 int error = 0; 332 struct ip6_pktopts opt, *optp = 0; 333 struct ifnet *oifp = NULL; 334 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 335 int priv = 0; 336 __va_list ap; 337 338 __va_start(ap, so); 339 dstsock = __va_arg(ap, struct sockaddr_in6 *); 340 control = __va_arg(ap, struct mbuf *); 341 __va_end(ap); 342 343 in6p = so->so_pcb; 344 345 priv = 0; 346 if (so->so_cred->cr_uid == 0) 347 priv = 1; 348 dst = &dstsock->sin6_addr; 349 if (control) { 350 if ((error = ip6_setpktoptions(control, &opt, 351 in6p->in6p_outputopts, 352 so->so_proto->pr_protocol, priv)) != 0) 353 goto bad; 354 optp = &opt; 355 } else 356 optp = in6p->in6p_outputopts; 357 358 /* 359 * For an ICMPv6 packet, we should know its type and code 360 * to update statistics. 361 */ 362 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 363 struct icmp6_hdr *icmp6; 364 if (m->m_len < sizeof(struct icmp6_hdr) && 365 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 366 error = ENOBUFS; 367 goto bad; 368 } 369 icmp6 = mtod(m, struct icmp6_hdr *); 370 type = icmp6->icmp6_type; 371 code = icmp6->icmp6_code; 372 } 373 374 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 375 ip6 = mtod(m, struct ip6_hdr *); 376 377 /* 378 * Next header might not be ICMP6 but use its pseudo header anyway. 379 */ 380 ip6->ip6_dst = *dst; 381 382 /* 383 * If the scope of the destination is link-local, embed the interface 384 * index in the address. 385 * 386 * XXX advanced-api value overrides sin6_scope_id 387 */ 388 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 389 struct in6_pktinfo *pi; 390 391 /* 392 * XXX Boundary check is assumed to be already done in 393 * ip6_setpktoptions(). 394 */ 395 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 396 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 397 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 398 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 399 in6p->in6p_moptions && 400 in6p->in6p_moptions->im6o_multicast_ifp) { 401 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 402 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 403 } else if (dstsock->sin6_scope_id) { 404 /* boundary check */ 405 if (dstsock->sin6_scope_id < 0 406 || if_index < dstsock->sin6_scope_id) { 407 error = ENXIO; /* XXX EINVAL? */ 408 goto bad; 409 } 410 ip6->ip6_dst.s6_addr16[1] 411 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 412 } 413 } 414 415 /* 416 * Source address selection. 417 */ 418 { 419 struct in6_addr *in6a; 420 421 if ((in6a = in6_selectsrc(dstsock, optp, 422 in6p->in6p_moptions, 423 &in6p->in6p_route, 424 &in6p->in6p_laddr, 425 &error, NULL)) == NULL) { 426 if (error == 0) 427 error = EADDRNOTAVAIL; 428 goto bad; 429 } 430 ip6->ip6_src = *in6a; 431 if (in6p->in6p_route.ro_rt) 432 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 433 } 434 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 435 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 436 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 437 (IPV6_VERSION & IPV6_VERSION_MASK); 438 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 439 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 440 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 441 442 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 443 in6p->in6p_cksum != -1) { 444 struct mbuf *n; 445 int off; 446 u_int16_t *p; 447 448 /* compute checksum */ 449 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 450 off = offsetof(struct icmp6_hdr, icmp6_cksum); 451 else 452 off = in6p->in6p_cksum; 453 if (plen < off + 1) { 454 error = EINVAL; 455 goto bad; 456 } 457 off += sizeof(struct ip6_hdr); 458 459 n = m; 460 while (n && n->m_len <= off) { 461 off -= n->m_len; 462 n = n->m_next; 463 } 464 if (!n) 465 goto bad; 466 p = (u_int16_t *)(mtod(n, caddr_t) + off); 467 *p = 0; 468 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 469 } 470 471 error = ip6_output(m, optp, &in6p->in6p_route, 0, 472 in6p->in6p_moptions, &oifp, in6p); 473 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 474 if (oifp) 475 icmp6_ifoutstat_inc(oifp, type, code); 476 icmp6stat.icp6s_outhist[type]++; 477 } else 478 rip6stat.rip6s_opackets++; 479 480 goto freectl; 481 482 bad: 483 if (m) 484 m_freem(m); 485 486 freectl: 487 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 488 RTFREE(optp->ip6po_route.ro_rt); 489 if (control) { 490 if (optp == &opt) 491 ip6_clearpktopts(optp, -1); 492 m_freem(control); 493 } 494 return (error); 495 } 496 497 /* 498 * Raw IPv6 socket option processing. 499 */ 500 void 501 rip6_ctloutput(netmsg_t msg) 502 { 503 struct socket *so = msg->ctloutput.base.nm_so;; 504 struct sockopt *sopt = msg->ctloutput.nm_sopt; 505 int error; 506 507 if (sopt->sopt_level == IPPROTO_ICMPV6) { 508 /* 509 * XXX: is it better to call icmp6_ctloutput() directly 510 * from protosw? 511 */ 512 icmp6_ctloutput(msg); 513 /* msg invalid now */ 514 return; 515 } 516 if (sopt->sopt_level != IPPROTO_IPV6) { 517 error = EINVAL; 518 goto out; 519 } 520 521 error = 0; 522 523 switch (sopt->sopt_dir) { 524 case SOPT_GET: 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_get(so, sopt); 534 break; 535 case IPV6_CHECKSUM: 536 error = ip6_raw_ctloutput(so, sopt); 537 break; 538 default: 539 error = ip6_ctloutput(so, sopt); 540 break; 541 } 542 break; 543 544 case SOPT_SET: 545 switch (sopt->sopt_name) { 546 case MRT6_INIT: 547 case MRT6_DONE: 548 case MRT6_ADD_MIF: 549 case MRT6_DEL_MIF: 550 case MRT6_ADD_MFC: 551 case MRT6_DEL_MFC: 552 case MRT6_PIM: 553 error = ip6_mrouter_set(so, sopt); 554 break; 555 case IPV6_CHECKSUM: 556 error = ip6_raw_ctloutput(so, sopt); 557 break; 558 default: 559 error = ip6_ctloutput(so, sopt); 560 break; 561 } 562 break; 563 } 564 out: 565 lwkt_replymsg(&msg->ctloutput.base.lmsg, error); 566 } 567 568 static void 569 rip6_attach(netmsg_t msg) 570 { 571 struct socket *so = msg->attach.base.nm_so; 572 int proto = msg->attach.nm_proto; 573 struct pru_attach_info *ai = msg->attach.nm_ai; 574 struct inpcb *inp; 575 int error; 576 577 inp = so->so_pcb; 578 if (inp) 579 panic("rip6_attach"); 580 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY); 581 if (error) 582 goto out; 583 584 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 585 if (error) 586 goto out; 587 crit_enter(); 588 error = in_pcballoc(so, &ripcbinfo); 589 crit_exit(); 590 if (error) 591 goto out; 592 inp = (struct inpcb *)so->so_pcb; 593 inp->inp_vflag |= INP_IPV6; 594 inp->in6p_ip6_nxt = (long)proto; 595 inp->in6p_hops = -1; /* use kernel default */ 596 inp->in6p_cksum = -1; 597 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 598 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 599 if (inp->in6p_icmp6filt != NULL) 600 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 601 error = 0; 602 out: 603 lwkt_replymsg(&msg->attach.base.lmsg, error); 604 } 605 606 static void 607 rip6_detach(netmsg_t msg) 608 { 609 struct socket *so = msg->detach.base.nm_so; 610 struct inpcb *inp; 611 612 inp = so->so_pcb; 613 if (inp == NULL) 614 panic("rip6_detach"); 615 /* xxx: RSVP */ 616 if (so == ip6_mrouter) 617 ip6_mrouter_done(); 618 if (inp->in6p_icmp6filt) { 619 FREE(inp->in6p_icmp6filt, M_PCB); 620 inp->in6p_icmp6filt = NULL; 621 } 622 in6_pcbdetach(inp); 623 lwkt_replymsg(&msg->detach.base.lmsg, 0); 624 } 625 626 /* 627 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 628 * will sofree() it when we return. 629 */ 630 static void 631 rip6_abort(netmsg_t msg) 632 { 633 soisdisconnected(msg->abort.base.nm_so); 634 rip6_detach(msg); 635 /* msg invalid now */ 636 } 637 638 static void 639 rip6_disconnect(netmsg_t msg) 640 { 641 struct socket *so = msg->disconnect.base.nm_so; 642 struct inpcb *inp = so->so_pcb; 643 644 if (so->so_state & SS_ISCONNECTED) { 645 inp->in6p_faddr = kin6addr_any; 646 soreference(so); 647 rip6_abort(msg); 648 /* msg invalid now */ 649 sofree(so); 650 return; 651 } 652 lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN); 653 } 654 655 static void 656 rip6_bind(netmsg_t msg) 657 { 658 struct socket *so = msg->bind.base.nm_so; 659 struct sockaddr *nam = msg->bind.nm_nam; 660 struct inpcb *inp = so->so_pcb; 661 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 662 struct ifaddr *ia = NULL; 663 int error; 664 665 if (nam->sa_len != sizeof(*addr)) { 666 error = EINVAL; 667 goto out; 668 } 669 670 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 671 error = EADDRNOTAVAIL; 672 goto out; 673 } 674 #ifdef ENABLE_DEFAULT_SCOPE 675 if (addr->sin6_scope_id == 0) { /* not change if specified */ 676 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 677 } 678 #endif 679 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 680 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 681 error = EADDRNOTAVAIL; 682 goto out; 683 } 684 if (ia && 685 ((struct in6_ifaddr *)ia)->ia6_flags & 686 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 687 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 688 error = EADDRNOTAVAIL; 689 goto out; 690 } 691 inp->in6p_laddr = addr->sin6_addr; 692 error = 0; 693 out: 694 lwkt_replymsg(&msg->bind.base.lmsg, error); 695 } 696 697 static void 698 rip6_connect(netmsg_t msg) 699 { 700 struct socket *so = msg->connect.base.nm_so; 701 struct sockaddr *nam = msg->connect.nm_nam; 702 struct inpcb *inp = so->so_pcb; 703 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 704 struct in6_addr *in6a = NULL; 705 int error = 0; 706 #ifdef ENABLE_DEFAULT_SCOPE 707 struct sockaddr_in6 tmp; 708 #endif 709 710 if (nam->sa_len != sizeof(*addr)) { 711 error = EINVAL; 712 goto out; 713 } 714 if (TAILQ_EMPTY(&ifnet)) { 715 error = EADDRNOTAVAIL; 716 goto out; 717 } 718 if (addr->sin6_family != AF_INET6) { 719 error = EAFNOSUPPORT; 720 goto out; 721 } 722 #ifdef ENABLE_DEFAULT_SCOPE 723 if (addr->sin6_scope_id == 0) { /* not change if specified */ 724 /* avoid overwrites */ 725 tmp = *addr; 726 addr = &tmp; 727 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 728 } 729 #endif 730 /* Source address selection. XXX: need pcblookup? */ 731 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 732 inp->in6p_moptions, &inp->in6p_route, 733 &inp->in6p_laddr, &error, NULL); 734 if (in6a == NULL) { 735 if (error == 0) 736 error = EADDRNOTAVAIL; 737 } else { 738 inp->in6p_laddr = *in6a; 739 inp->in6p_faddr = addr->sin6_addr; 740 soisconnected(so); 741 error = 0; 742 } 743 out: 744 lwkt_replymsg(&msg->connect.base.lmsg, error); 745 } 746 747 static void 748 rip6_shutdown(netmsg_t msg) 749 { 750 socantsendmore(msg->shutdown.base.nm_so); 751 lwkt_replymsg(&msg->shutdown.base.lmsg, 0); 752 } 753 754 static void 755 rip6_send(netmsg_t msg) 756 { 757 struct socket *so = msg->send.base.nm_so; 758 struct mbuf *m = msg->send.nm_m; 759 struct sockaddr *nam = msg->send.nm_addr; 760 struct mbuf *control = msg->send.nm_control; 761 struct inpcb *inp = so->so_pcb; 762 struct sockaddr_in6 tmp; 763 struct sockaddr_in6 *dst; 764 int error; 765 766 /* always copy sockaddr to avoid overwrites */ 767 if (so->so_state & SS_ISCONNECTED) { 768 if (nam) { 769 m_freem(m); 770 error = EISCONN; 771 goto out; 772 } 773 /* XXX */ 774 bzero(&tmp, sizeof(tmp)); 775 tmp.sin6_family = AF_INET6; 776 tmp.sin6_len = sizeof(struct sockaddr_in6); 777 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 778 sizeof(struct in6_addr)); 779 dst = &tmp; 780 } else { 781 if (nam == NULL) { 782 m_freem(m); 783 error = ENOTCONN; 784 goto out; 785 } 786 tmp = *(struct sockaddr_in6 *)nam; 787 dst = &tmp; 788 } 789 #ifdef ENABLE_DEFAULT_SCOPE 790 if (dst->sin6_scope_id == 0) { /* not change if specified */ 791 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 792 } 793 #endif 794 error = rip6_output(m, so, dst, control); 795 out: 796 lwkt_replymsg(&msg->send.base.lmsg, error); 797 } 798 799 struct pr_usrreqs rip6_usrreqs = { 800 .pru_abort = rip6_abort, 801 .pru_accept = pr_generic_notsupp, 802 .pru_attach = rip6_attach, 803 .pru_bind = rip6_bind, 804 .pru_connect = rip6_connect, 805 .pru_connect2 = pr_generic_notsupp, 806 .pru_control = in6_control_dispatch, 807 .pru_detach = rip6_detach, 808 .pru_disconnect = rip6_disconnect, 809 .pru_listen = pr_generic_notsupp, 810 .pru_peeraddr = in6_setpeeraddr_dispatch, 811 .pru_rcvd = pr_generic_notsupp, 812 .pru_rcvoob = pr_generic_notsupp, 813 .pru_send = rip6_send, 814 .pru_sense = pru_sense_null, 815 .pru_shutdown = rip6_shutdown, 816 .pru_sockaddr = in6_setsockaddr_dispatch, 817 .pru_sosend = sosend, 818 .pru_soreceive = soreceive 819 }; 820