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 */ 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. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 61 */ 62 63 #include "opt_ipsec.h" 64 #include "opt_inet6.h" 65 66 #include <sys/param.h> 67 #include <sys/malloc.h> 68 #include <sys/proc.h> 69 #include <sys/priv.h> 70 #include <sys/mbuf.h> 71 #include <sys/socket.h> 72 #include <sys/jail.h> 73 #include <sys/protosw.h> 74 #include <sys/socketvar.h> 75 #include <sys/errno.h> 76 #include <sys/systm.h> 77 78 #include <sys/thread2.h> 79 #include <sys/socketvar2.h> 80 #include <sys/msgport2.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/if_types.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip6.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/ip6_mroute.h> 92 #include <netinet/icmp6.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet6/in6_pcb.h> 95 #include <netinet6/nd6.h> 96 #include <netinet6/ip6protosw.h> 97 #ifdef ENABLE_DEFAULT_SCOPE 98 #include <netinet6/scope6_var.h> 99 #endif 100 #include <netinet6/raw_ip6.h> 101 102 #ifdef IPSEC 103 #include <netinet6/ipsec.h> 104 #include <netinet6/ipsec6.h> 105 #endif /*IPSEC*/ 106 107 #ifdef FAST_IPSEC 108 #include <netproto/ipsec/ipsec.h> 109 #include <netproto/ipsec/ipsec6.h> 110 #endif /* FAST_IPSEC */ 111 112 #include <machine/stdarg.h> 113 114 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 115 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 116 117 /* 118 * Raw interface to IP6 protocol. 119 */ 120 121 extern struct inpcbinfo ripcbinfo; 122 extern u_long rip_sendspace; 123 extern u_long rip_recvspace; 124 125 struct rip6stat rip6stat; 126 127 /* 128 * Setup generic address and protocol structures 129 * for raw_input routine, then pass them along with 130 * mbuf chain. 131 */ 132 int 133 rip6_input(struct mbuf **mp, int *offp, int proto) 134 { 135 struct mbuf *m = *mp; 136 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 137 struct inpcb *in6p; 138 struct inpcb *last = NULL; 139 struct mbuf *opts = NULL; 140 struct sockaddr_in6 rip6src; 141 142 rip6stat.rip6s_ipackets++; 143 144 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 145 /* XXX send icmp6 host/port unreach? */ 146 m_freem(m); 147 return IPPROTO_DONE; 148 } 149 150 init_sin6(&rip6src, m); /* general init */ 151 152 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) { 153 if (in6p->in6p_flags & INP_PLACEMARKER) 154 continue; 155 if (!INP_ISIPV6(in6p)) 156 continue; 157 if (in6p->in6p_ip6_nxt && 158 in6p->in6p_ip6_nxt != proto) 159 continue; 160 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 161 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 162 continue; 163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 165 continue; 166 if (in6p->in6p_cksum != -1) { 167 rip6stat.rip6s_isum++; 168 if (in6_cksum(m, ip6->ip6_nxt, *offp, 169 m->m_pkthdr.len - *offp)) { 170 rip6stat.rip6s_badsum++; 171 continue; 172 } 173 } 174 if (last) { 175 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 176 177 #ifdef IPSEC 178 /* 179 * Check AH/ESP integrity. 180 */ 181 if (n && ipsec6_in_reject_so(n, last->inp_socket)) { 182 m_freem(n); 183 ipsec6stat.in_polvio++; 184 /* do not inject data into pcb */ 185 } else 186 #endif /*IPSEC*/ 187 #ifdef FAST_IPSEC 188 /* 189 * Check AH/ESP integrity. 190 */ 191 if (n && ipsec6_in_reject(n, last)) { 192 m_freem(n); 193 /* do not inject data into pcb */ 194 } else 195 #endif /*FAST_IPSEC*/ 196 if (n) { 197 struct socket *so; 198 199 so = last->in6p_socket; 200 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 201 (so->so_options & SO_TIMESTAMP)) { 202 ip6_savecontrol(last, &opts, ip6, n); 203 } 204 /* strip intermediate headers */ 205 m_adj(n, *offp); 206 lwkt_gettoken(&so->so_rcv.ssb_token); 207 if (ssb_appendaddr(&so->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(so); 216 } 217 lwkt_reltoken(&so->so_rcv.ssb_token); 218 opts = NULL; 219 } 220 } 221 last = in6p; 222 } 223 #ifdef IPSEC 224 /* 225 * Check AH/ESP integrity. 226 */ 227 if (last && ipsec6_in_reject_so(m, last->inp_socket)) { 228 m_freem(m); 229 ipsec6stat.in_polvio++; 230 ip6stat.ip6s_delivered--; 231 /* do not inject data into pcb */ 232 } else 233 #endif /*IPSEC*/ 234 #ifdef FAST_IPSEC 235 /* 236 * Check AH/ESP integrity. 237 */ 238 if (last && ipsec6_in_reject(m, last)) { 239 m_freem(m); 240 ip6stat.ip6s_delivered--; 241 /* do not inject data into pcb */ 242 } else 243 #endif /*FAST_IPSEC*/ 244 if (last) { 245 struct socket *so; 246 247 so = last->in6p_socket; 248 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 249 (so->so_options & SO_TIMESTAMP)) { 250 ip6_savecontrol(last, &opts, ip6, m); 251 } 252 /* strip intermediate headers */ 253 m_adj(m, *offp); 254 lwkt_gettoken(&so->so_rcv.ssb_token); 255 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src, 256 m, opts) == 0) { 257 m_freem(m); 258 if (opts) 259 m_freem(opts); 260 rip6stat.rip6s_fullsock++; 261 } else { 262 sorwakeup(so); 263 } 264 lwkt_reltoken(&so->so_rcv.ssb_token); 265 } else { 266 rip6stat.rip6s_nosock++; 267 if (m->m_flags & M_MCAST) 268 rip6stat.rip6s_nosockmcast++; 269 if (proto == IPPROTO_NONE) 270 m_freem(m); 271 else { 272 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 273 icmp6_error(m, ICMP6_PARAM_PROB, 274 ICMP6_PARAMPROB_NEXTHEADER, 275 prvnxtp - mtod(m, char *)); 276 } 277 ip6stat.ip6s_delivered--; 278 } 279 return IPPROTO_DONE; 280 } 281 282 void 283 rip6_ctlinput(netmsg_t msg) 284 { 285 int cmd = msg->ctlinput.nm_cmd; 286 struct sockaddr *sa = msg->ctlinput.nm_arg; 287 void *d = msg->ctlinput.nm_extra; 288 struct ip6ctlparam *ip6cp = NULL; 289 const struct sockaddr_in6 *sa6_src = NULL; 290 inp_notify_t notify = in6_rtchange; 291 292 if (sa->sa_family != AF_INET6 || 293 sa->sa_len != sizeof(struct sockaddr_in6)) 294 goto out; 295 296 if ((unsigned)cmd >= PRC_NCMDS) 297 goto out; 298 if (PRC_IS_REDIRECT(cmd)) 299 notify = in6_rtchange, d = NULL; 300 else if (cmd == PRC_HOSTDEAD) 301 d = NULL; 302 else if (inet6ctlerrmap[cmd] == 0) 303 goto out; 304 305 /* if the parameter is from icmp6, decode it. */ 306 if (d != NULL) { 307 ip6cp = (struct ip6ctlparam *)d; 308 sa6_src = ip6cp->ip6c_src; 309 } else { 310 sa6_src = &sa6_any; 311 } 312 313 in6_pcbnotify(&ripcbinfo, sa, 0, 314 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify); 315 out: 316 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 317 } 318 319 /* 320 * Generate IPv6 header and pass packet to ip6_output. 321 * Tack on options user may have setup with control call. 322 */ 323 int 324 rip6_output(struct mbuf *m, struct socket *so, ...) 325 { 326 struct sockaddr_in6 *dstsock; 327 struct mbuf *control; 328 struct in6_addr *dst; 329 struct ip6_hdr *ip6; 330 struct inpcb *in6p; 331 u_int plen = m->m_pkthdr.len; 332 int error = 0; 333 struct ip6_pktopts opt, *optp = NULL; 334 struct ifnet *oifp = NULL; 335 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 336 int priv = 0; 337 __va_list ap; 338 339 __va_start(ap, so); 340 dstsock = __va_arg(ap, struct sockaddr_in6 *); 341 control = __va_arg(ap, struct mbuf *); 342 __va_end(ap); 343 344 if (IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) { 345 error = EADDRNOTAVAIL; 346 goto bad; 347 } 348 349 in6p = so->so_pcb; 350 351 priv = 0; 352 if (so->so_cred->cr_uid == 0) 353 priv = 1; 354 dst = &dstsock->sin6_addr; 355 if (control) { 356 if ((error = ip6_setpktoptions(control, &opt, 357 in6p->in6p_outputopts, 358 so->so_proto->pr_protocol, priv)) != 0) 359 goto bad; 360 optp = &opt; 361 } else 362 optp = in6p->in6p_outputopts; 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_WAITOK); 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 (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 402 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 403 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 404 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 405 in6p->in6p_moptions && 406 in6p->in6p_moptions->im6o_multicast_ifp) { 407 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 408 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 409 } else if (dstsock->sin6_scope_id) { 410 /* boundary check */ 411 if (dstsock->sin6_scope_id < 0 || 412 if_index < dstsock->sin6_scope_id) { 413 error = ENXIO; /* XXX EINVAL? */ 414 goto bad; 415 } 416 ip6->ip6_dst.s6_addr16[1] = 417 htons(dstsock->sin6_scope_id & 0xffff); /* XXX */ 418 } 419 } 420 421 /* 422 * Source address selection. 423 */ 424 { 425 struct in6_addr *in6a; 426 427 if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, 428 &in6p->in6p_route, &in6p->in6p_laddr, &error, NULL)) 429 == NULL) { 430 if (error == 0) 431 error = EADDRNOTAVAIL; 432 goto bad; 433 } 434 ip6->ip6_src = *in6a; 435 if (in6p->in6p_route.ro_rt) 436 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 437 } 438 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 439 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 440 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 441 (IPV6_VERSION & IPV6_VERSION_MASK); 442 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 443 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 444 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 445 446 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 447 in6p->in6p_cksum != -1) { 448 struct mbuf *n; 449 int off; 450 u_int16_t *p; 451 452 /* compute checksum */ 453 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 454 off = offsetof(struct icmp6_hdr, icmp6_cksum); 455 else 456 off = in6p->in6p_cksum; 457 if (plen < off + 1) { 458 error = EINVAL; 459 goto bad; 460 } 461 off += sizeof(struct ip6_hdr); 462 463 n = m; 464 while (n && n->m_len <= off) { 465 off -= n->m_len; 466 n = n->m_next; 467 } 468 if (!n) 469 goto bad; 470 p = (u_int16_t *)(mtod(n, caddr_t) + off); 471 *p = 0; 472 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 473 } 474 475 error = ip6_output(m, optp, &in6p->in6p_route, 0, 476 in6p->in6p_moptions, &oifp, in6p); 477 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 478 if (oifp) 479 icmp6_ifoutstat_inc(oifp, type, code); 480 icmp6stat.icp6s_outhist[type]++; 481 } else 482 rip6stat.rip6s_opackets++; 483 484 goto freectl; 485 486 bad: 487 if (m) 488 m_freem(m); 489 490 freectl: 491 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 492 RTFREE(optp->ip6po_route.ro_rt); 493 if (control) { 494 if (optp == &opt) 495 ip6_clearpktopts(optp, -1); 496 m_freem(control); 497 } 498 return (error); 499 } 500 501 /* 502 * Raw IPv6 socket option processing. 503 */ 504 void 505 rip6_ctloutput(netmsg_t msg) 506 { 507 struct socket *so = msg->ctloutput.base.nm_so; 508 struct sockopt *sopt = msg->ctloutput.nm_sopt; 509 int error; 510 511 if (sopt->sopt_level == IPPROTO_ICMPV6) { 512 /* 513 * XXX: is it better to call icmp6_ctloutput() directly 514 * from protosw? 515 */ 516 icmp6_ctloutput(msg); 517 /* msg invalid now */ 518 return; 519 } 520 if (sopt->sopt_level != IPPROTO_IPV6) { 521 error = EINVAL; 522 goto out; 523 } 524 525 error = 0; 526 527 switch (sopt->sopt_dir) { 528 case SOPT_GET: 529 switch (sopt->sopt_name) { 530 case MRT6_INIT: 531 case MRT6_DONE: 532 case MRT6_ADD_MIF: 533 case MRT6_DEL_MIF: 534 case MRT6_ADD_MFC: 535 case MRT6_DEL_MFC: 536 case MRT6_PIM: 537 error = ip6_mrouter_get(so, sopt); 538 break; 539 case IPV6_CHECKSUM: 540 error = ip6_raw_ctloutput(so, sopt); 541 break; 542 default: 543 error = ip6_ctloutput(so, sopt); 544 break; 545 } 546 break; 547 548 case SOPT_SET: 549 switch (sopt->sopt_name) { 550 case MRT6_INIT: 551 case MRT6_DONE: 552 case MRT6_ADD_MIF: 553 case MRT6_DEL_MIF: 554 case MRT6_ADD_MFC: 555 case MRT6_DEL_MFC: 556 case MRT6_PIM: 557 error = ip6_mrouter_set(so, sopt); 558 break; 559 case IPV6_CHECKSUM: 560 error = ip6_raw_ctloutput(so, sopt); 561 break; 562 default: 563 error = ip6_ctloutput(so, sopt); 564 break; 565 } 566 break; 567 } 568 out: 569 lwkt_replymsg(&msg->ctloutput.base.lmsg, error); 570 } 571 572 static void 573 rip6_attach(netmsg_t msg) 574 { 575 struct socket *so = msg->attach.base.nm_so; 576 int proto = msg->attach.nm_proto; 577 struct pru_attach_info *ai = msg->attach.nm_ai; 578 struct inpcb *inp; 579 int error; 580 581 inp = so->so_pcb; 582 if (inp) 583 panic("rip6_attach"); 584 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY); 585 if (error) 586 goto out; 587 588 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 589 if (error) 590 goto out; 591 crit_enter(); 592 error = in_pcballoc(so, &ripcbinfo); 593 crit_exit(); 594 if (error) 595 goto out; 596 inp = (struct inpcb *)so->so_pcb; 597 inp->in6p_ip6_nxt = (long)proto; 598 inp->in6p_hops = -1; /* use kernel default */ 599 inp->in6p_cksum = -1; 600 inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB, 601 M_NOWAIT); 602 if (inp->in6p_icmp6filt != NULL) 603 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 604 error = 0; 605 out: 606 lwkt_replymsg(&msg->attach.base.lmsg, error); 607 } 608 609 static void 610 rip6_detach(netmsg_t msg) 611 { 612 struct socket *so = msg->detach.base.nm_so; 613 struct inpcb *inp; 614 615 inp = so->so_pcb; 616 if (inp == NULL) 617 panic("rip6_detach"); 618 /* xxx: RSVP */ 619 if (so == ip6_mrouter) 620 ip6_mrouter_done(); 621 if (inp->in6p_icmp6filt) { 622 kfree(inp->in6p_icmp6filt, M_PCB); 623 inp->in6p_icmp6filt = NULL; 624 } 625 in6_pcbdetach(inp); 626 lwkt_replymsg(&msg->detach.base.lmsg, 0); 627 } 628 629 /* 630 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 631 * will sofree() it when we return. 632 */ 633 static void 634 rip6_abort(netmsg_t msg) 635 { 636 soisdisconnected(msg->abort.base.nm_so); 637 rip6_detach(msg); 638 /* msg invalid now */ 639 } 640 641 static void 642 rip6_disconnect(netmsg_t msg) 643 { 644 struct socket *so = msg->disconnect.base.nm_so; 645 struct inpcb *inp = so->so_pcb; 646 647 if (so->so_state & SS_ISCONNECTED) { 648 inp->in6p_faddr = kin6addr_any; 649 soreference(so); 650 rip6_abort(msg); 651 /* msg invalid now */ 652 sofree(so); 653 return; 654 } 655 lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN); 656 } 657 658 static void 659 rip6_bind(netmsg_t msg) 660 { 661 struct socket *so = msg->bind.base.nm_so; 662 struct sockaddr *nam = msg->bind.nm_nam; 663 struct inpcb *inp = so->so_pcb; 664 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 665 struct ifaddr *ia = NULL; 666 int error; 667 668 if (nam->sa_len != sizeof(*addr)) { 669 error = EINVAL; 670 goto out; 671 } 672 if (ifnet_array_isempty() || addr->sin6_family != AF_INET6) { 673 error = EADDRNOTAVAIL; 674 goto out; 675 } 676 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 677 error = EADDRNOTAVAIL; 678 goto out; 679 } 680 #ifdef ENABLE_DEFAULT_SCOPE 681 if (addr->sin6_scope_id == 0) { /* not change if specified */ 682 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 683 } 684 #endif 685 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 686 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 687 error = EADDRNOTAVAIL; 688 goto out; 689 } 690 if (ia && 691 ((struct in6_ifaddr *)ia)->ia6_flags & 692 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 693 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 694 error = EADDRNOTAVAIL; 695 goto out; 696 } 697 inp->in6p_laddr = addr->sin6_addr; 698 error = 0; 699 out: 700 lwkt_replymsg(&msg->bind.base.lmsg, error); 701 } 702 703 static void 704 rip6_connect(netmsg_t msg) 705 { 706 struct socket *so = msg->connect.base.nm_so; 707 struct sockaddr *nam = msg->connect.nm_nam; 708 struct inpcb *inp = so->so_pcb; 709 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 710 struct in6_addr *in6a = NULL; 711 int error = 0; 712 #ifdef ENABLE_DEFAULT_SCOPE 713 struct sockaddr_in6 tmp; 714 #endif 715 716 if (nam->sa_len != sizeof(*addr)) { 717 error = EINVAL; 718 goto out; 719 } 720 if (ifnet_array_isempty()) { 721 error = EADDRNOTAVAIL; 722 goto out; 723 } 724 if (addr->sin6_family != AF_INET6) { 725 error = EAFNOSUPPORT; 726 goto out; 727 } 728 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 729 error = EADDRNOTAVAIL; 730 goto out; 731 } 732 #ifdef ENABLE_DEFAULT_SCOPE 733 if (addr->sin6_scope_id == 0) { /* not change if specified */ 734 /* avoid overwrites */ 735 tmp = *addr; 736 addr = &tmp; 737 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 738 } 739 #endif 740 /* Source address selection. XXX: need pcblookup? */ 741 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 742 inp->in6p_moptions, &inp->in6p_route, 743 &inp->in6p_laddr, &error, NULL); 744 if (in6a == NULL) { 745 if (error == 0) 746 error = EADDRNOTAVAIL; 747 } else { 748 inp->in6p_laddr = *in6a; 749 inp->in6p_faddr = addr->sin6_addr; 750 soisconnected(so); 751 error = 0; 752 } 753 out: 754 lwkt_replymsg(&msg->connect.base.lmsg, error); 755 } 756 757 static void 758 rip6_shutdown(netmsg_t msg) 759 { 760 socantsendmore(msg->shutdown.base.nm_so); 761 lwkt_replymsg(&msg->shutdown.base.lmsg, 0); 762 } 763 764 static void 765 rip6_send(netmsg_t msg) 766 { 767 struct socket *so = msg->send.base.nm_so; 768 struct mbuf *m = msg->send.nm_m; 769 struct sockaddr *nam = msg->send.nm_addr; 770 struct mbuf *control = msg->send.nm_control; 771 struct inpcb *inp = so->so_pcb; 772 struct sockaddr_in6 tmp; 773 struct sockaddr_in6 *dst; 774 int error; 775 776 /* always copy sockaddr to avoid overwrites */ 777 if (so->so_state & SS_ISCONNECTED) { 778 if (nam) { 779 m_freem(m); 780 error = EISCONN; 781 goto out; 782 } 783 /* XXX */ 784 bzero(&tmp, sizeof(tmp)); 785 tmp.sin6_family = AF_INET6; 786 tmp.sin6_len = sizeof(struct sockaddr_in6); 787 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 788 sizeof(struct in6_addr)); 789 dst = &tmp; 790 } else { 791 if (nam == NULL) { 792 m_freem(m); 793 error = ENOTCONN; 794 goto out; 795 } 796 tmp = *(struct sockaddr_in6 *)nam; 797 dst = &tmp; 798 } 799 #ifdef ENABLE_DEFAULT_SCOPE 800 if (dst->sin6_scope_id == 0) { /* not change if specified */ 801 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 802 } 803 #endif 804 error = rip6_output(m, so, dst, control); 805 out: 806 lwkt_replymsg(&msg->send.base.lmsg, error); 807 } 808 809 struct pr_usrreqs rip6_usrreqs = { 810 .pru_abort = rip6_abort, 811 .pru_accept = pr_generic_notsupp, 812 .pru_attach = rip6_attach, 813 .pru_bind = rip6_bind, 814 .pru_connect = rip6_connect, 815 .pru_connect2 = pr_generic_notsupp, 816 .pru_control = in6_control_dispatch, 817 .pru_detach = rip6_detach, 818 .pru_disconnect = rip6_disconnect, 819 .pru_listen = pr_generic_notsupp, 820 .pru_peeraddr = in6_setpeeraddr_dispatch, 821 .pru_rcvd = pr_generic_notsupp, 822 .pru_rcvoob = pr_generic_notsupp, 823 .pru_send = rip6_send, 824 .pru_sense = pru_sense_null, 825 .pru_shutdown = rip6_shutdown, 826 .pru_sockaddr = in6_setsockaddr_dispatch, 827 .pru_sosend = sosend, 828 .pru_soreceive = soreceive 829 }; 830