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sys/netinet6/raw_ip6.c
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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 (!(in6p->in6p_vflag & INP_IPV6)) 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 void (*notify) (struct inpcb *, int) = 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.pcblisthead, 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 in6p = so->so_pcb; 345 346 priv = 0; 347 if (so->so_cred->cr_uid == 0) 348 priv = 1; 349 dst = &dstsock->sin6_addr; 350 if (control) { 351 if ((error = ip6_setpktoptions(control, &opt, 352 in6p->in6p_outputopts, 353 so->so_proto->pr_protocol, priv)) != 0) 354 goto bad; 355 optp = &opt; 356 } else 357 optp = in6p->in6p_outputopts; 358 359 /* 360 * For an ICMPv6 packet, we should know its type and code 361 * to update statistics. 362 */ 363 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 364 struct icmp6_hdr *icmp6; 365 if (m->m_len < sizeof(struct icmp6_hdr) && 366 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 367 error = ENOBUFS; 368 goto bad; 369 } 370 icmp6 = mtod(m, struct icmp6_hdr *); 371 type = icmp6->icmp6_type; 372 code = icmp6->icmp6_code; 373 } 374 375 M_PREPEND(m, sizeof(*ip6), MB_WAIT); 376 ip6 = mtod(m, struct ip6_hdr *); 377 378 /* 379 * Next header might not be ICMP6 but use its pseudo header anyway. 380 */ 381 ip6->ip6_dst = *dst; 382 383 /* 384 * If the scope of the destination is link-local, embed the interface 385 * index in the address. 386 * 387 * XXX advanced-api value overrides sin6_scope_id 388 */ 389 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 390 struct in6_pktinfo *pi; 391 392 /* 393 * XXX Boundary check is assumed to be already done in 394 * ip6_setpktoptions(). 395 */ 396 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 397 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 398 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 399 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 400 in6p->in6p_moptions && 401 in6p->in6p_moptions->im6o_multicast_ifp) { 402 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 403 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 404 } else if (dstsock->sin6_scope_id) { 405 /* boundary check */ 406 if (dstsock->sin6_scope_id < 0 407 || if_index < dstsock->sin6_scope_id) { 408 error = ENXIO; /* XXX EINVAL? */ 409 goto bad; 410 } 411 ip6->ip6_dst.s6_addr16[1] 412 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 413 } 414 } 415 416 /* 417 * Source address selection. 418 */ 419 { 420 struct in6_addr *in6a; 421 422 if ((in6a = in6_selectsrc(dstsock, optp, 423 in6p->in6p_moptions, 424 &in6p->in6p_route, 425 &in6p->in6p_laddr, 426 &error, NULL)) == NULL) { 427 if (error == 0) 428 error = EADDRNOTAVAIL; 429 goto bad; 430 } 431 ip6->ip6_src = *in6a; 432 if (in6p->in6p_route.ro_rt) 433 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 434 } 435 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 436 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 437 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 438 (IPV6_VERSION & IPV6_VERSION_MASK); 439 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 440 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 441 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 442 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 444 in6p->in6p_cksum != -1) { 445 struct mbuf *n; 446 int off; 447 u_int16_t *p; 448 449 /* compute checksum */ 450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 451 off = offsetof(struct icmp6_hdr, icmp6_cksum); 452 else 453 off = in6p->in6p_cksum; 454 if (plen < off + 1) { 455 error = EINVAL; 456 goto bad; 457 } 458 off += sizeof(struct ip6_hdr); 459 460 n = m; 461 while (n && n->m_len <= off) { 462 off -= n->m_len; 463 n = n->m_next; 464 } 465 if (!n) 466 goto bad; 467 p = (u_int16_t *)(mtod(n, caddr_t) + off); 468 *p = 0; 469 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 470 } 471 472 error = ip6_output(m, optp, &in6p->in6p_route, 0, 473 in6p->in6p_moptions, &oifp, in6p); 474 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 475 if (oifp) 476 icmp6_ifoutstat_inc(oifp, type, code); 477 icmp6stat.icp6s_outhist[type]++; 478 } else 479 rip6stat.rip6s_opackets++; 480 481 goto freectl; 482 483 bad: 484 if (m) 485 m_freem(m); 486 487 freectl: 488 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 489 RTFREE(optp->ip6po_route.ro_rt); 490 if (control) { 491 if (optp == &opt) 492 ip6_clearpktopts(optp, -1); 493 m_freem(control); 494 } 495 return (error); 496 } 497 498 /* 499 * Raw IPv6 socket option processing. 500 */ 501 void 502 rip6_ctloutput(netmsg_t msg) 503 { 504 struct socket *so = msg->ctloutput.base.nm_so; 505 struct sockopt *sopt = msg->ctloutput.nm_sopt; 506 int error; 507 508 if (sopt->sopt_level == IPPROTO_ICMPV6) { 509 /* 510 * XXX: is it better to call icmp6_ctloutput() directly 511 * from protosw? 512 */ 513 icmp6_ctloutput(msg); 514 /* msg invalid now */ 515 return; 516 } 517 if (sopt->sopt_level != IPPROTO_IPV6) { 518 error = EINVAL; 519 goto out; 520 } 521 522 error = 0; 523 524 switch (sopt->sopt_dir) { 525 case SOPT_GET: 526 switch (sopt->sopt_name) { 527 case MRT6_INIT: 528 case MRT6_DONE: 529 case MRT6_ADD_MIF: 530 case MRT6_DEL_MIF: 531 case MRT6_ADD_MFC: 532 case MRT6_DEL_MFC: 533 case MRT6_PIM: 534 error = ip6_mrouter_get(so, sopt); 535 break; 536 case IPV6_CHECKSUM: 537 error = ip6_raw_ctloutput(so, sopt); 538 break; 539 default: 540 error = ip6_ctloutput(so, sopt); 541 break; 542 } 543 break; 544 545 case SOPT_SET: 546 switch (sopt->sopt_name) { 547 case MRT6_INIT: 548 case MRT6_DONE: 549 case MRT6_ADD_MIF: 550 case MRT6_DEL_MIF: 551 case MRT6_ADD_MFC: 552 case MRT6_DEL_MFC: 553 case MRT6_PIM: 554 error = ip6_mrouter_set(so, sopt); 555 break; 556 case IPV6_CHECKSUM: 557 error = ip6_raw_ctloutput(so, sopt); 558 break; 559 default: 560 error = ip6_ctloutput(so, sopt); 561 break; 562 } 563 break; 564 } 565 out: 566 lwkt_replymsg(&msg->ctloutput.base.lmsg, error); 567 } 568 569 static void 570 rip6_attach(netmsg_t msg) 571 { 572 struct socket *so = msg->attach.base.nm_so; 573 int proto = msg->attach.nm_proto; 574 struct pru_attach_info *ai = msg->attach.nm_ai; 575 struct inpcb *inp; 576 int error; 577 578 inp = so->so_pcb; 579 if (inp) 580 panic("rip6_attach"); 581 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY); 582 if (error) 583 goto out; 584 585 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit); 586 if (error) 587 goto out; 588 crit_enter(); 589 error = in_pcballoc(so, &ripcbinfo); 590 crit_exit(); 591 if (error) 592 goto out; 593 inp = (struct inpcb *)so->so_pcb; 594 inp->inp_vflag |= INP_IPV6; 595 inp->in6p_ip6_nxt = (long)proto; 596 inp->in6p_hops = -1; /* use kernel default */ 597 inp->in6p_cksum = -1; 598 inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB, 599 M_NOWAIT); 600 if (inp->in6p_icmp6filt != NULL) 601 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 602 error = 0; 603 out: 604 lwkt_replymsg(&msg->attach.base.lmsg, error); 605 } 606 607 static void 608 rip6_detach(netmsg_t msg) 609 { 610 struct socket *so = msg->detach.base.nm_so; 611 struct inpcb *inp; 612 613 inp = so->so_pcb; 614 if (inp == NULL) 615 panic("rip6_detach"); 616 /* xxx: RSVP */ 617 if (so == ip6_mrouter) 618 ip6_mrouter_done(); 619 if (inp->in6p_icmp6filt) { 620 kfree(inp->in6p_icmp6filt, M_PCB); 621 inp->in6p_icmp6filt = NULL; 622 } 623 in6_pcbdetach(inp); 624 lwkt_replymsg(&msg->detach.base.lmsg, 0); 625 } 626 627 /* 628 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 629 * will sofree() it when we return. 630 */ 631 static void 632 rip6_abort(netmsg_t msg) 633 { 634 soisdisconnected(msg->abort.base.nm_so); 635 rip6_detach(msg); 636 /* msg invalid now */ 637 } 638 639 static void 640 rip6_disconnect(netmsg_t msg) 641 { 642 struct socket *so = msg->disconnect.base.nm_so; 643 struct inpcb *inp = so->so_pcb; 644 645 if (so->so_state & SS_ISCONNECTED) { 646 inp->in6p_faddr = kin6addr_any; 647 soreference(so); 648 rip6_abort(msg); 649 /* msg invalid now */ 650 sofree(so); 651 return; 652 } 653 lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN); 654 } 655 656 static void 657 rip6_bind(netmsg_t msg) 658 { 659 struct socket *so = msg->bind.base.nm_so; 660 struct sockaddr *nam = msg->bind.nm_nam; 661 struct inpcb *inp = so->so_pcb; 662 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 663 struct ifaddr *ia = NULL; 664 int error; 665 666 if (nam->sa_len != sizeof(*addr)) { 667 error = EINVAL; 668 goto out; 669 } 670 671 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) { 672 error = EADDRNOTAVAIL; 673 goto out; 674 } 675 #ifdef ENABLE_DEFAULT_SCOPE 676 if (addr->sin6_scope_id == 0) { /* not change if specified */ 677 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 678 } 679 #endif 680 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 681 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) { 682 error = EADDRNOTAVAIL; 683 goto out; 684 } 685 if (ia && 686 ((struct in6_ifaddr *)ia)->ia6_flags & 687 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 688 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 689 error = EADDRNOTAVAIL; 690 goto out; 691 } 692 inp->in6p_laddr = addr->sin6_addr; 693 error = 0; 694 out: 695 lwkt_replymsg(&msg->bind.base.lmsg, error); 696 } 697 698 static void 699 rip6_connect(netmsg_t msg) 700 { 701 struct socket *so = msg->connect.base.nm_so; 702 struct sockaddr *nam = msg->connect.nm_nam; 703 struct inpcb *inp = so->so_pcb; 704 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 705 struct in6_addr *in6a = NULL; 706 int error = 0; 707 #ifdef ENABLE_DEFAULT_SCOPE 708 struct sockaddr_in6 tmp; 709 #endif 710 711 if (nam->sa_len != sizeof(*addr)) { 712 error = EINVAL; 713 goto out; 714 } 715 if (TAILQ_EMPTY(&ifnet)) { 716 error = EADDRNOTAVAIL; 717 goto out; 718 } 719 if (addr->sin6_family != AF_INET6) { 720 error = EAFNOSUPPORT; 721 goto out; 722 } 723 #ifdef ENABLE_DEFAULT_SCOPE 724 if (addr->sin6_scope_id == 0) { /* not change if specified */ 725 /* avoid overwrites */ 726 tmp = *addr; 727 addr = &tmp; 728 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 729 } 730 #endif 731 /* Source address selection. XXX: need pcblookup? */ 732 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 733 inp->in6p_moptions, &inp->in6p_route, 734 &inp->in6p_laddr, &error, NULL); 735 if (in6a == NULL) { 736 if (error == 0) 737 error = EADDRNOTAVAIL; 738 } else { 739 inp->in6p_laddr = *in6a; 740 inp->in6p_faddr = addr->sin6_addr; 741 soisconnected(so); 742 error = 0; 743 } 744 out: 745 lwkt_replymsg(&msg->connect.base.lmsg, error); 746 } 747 748 static void 749 rip6_shutdown(netmsg_t msg) 750 { 751 socantsendmore(msg->shutdown.base.nm_so); 752 lwkt_replymsg(&msg->shutdown.base.lmsg, 0); 753 } 754 755 static void 756 rip6_send(netmsg_t msg) 757 { 758 struct socket *so = msg->send.base.nm_so; 759 struct mbuf *m = msg->send.nm_m; 760 struct sockaddr *nam = msg->send.nm_addr; 761 struct mbuf *control = msg->send.nm_control; 762 struct inpcb *inp = so->so_pcb; 763 struct sockaddr_in6 tmp; 764 struct sockaddr_in6 *dst; 765 int error; 766 767 /* always copy sockaddr to avoid overwrites */ 768 if (so->so_state & SS_ISCONNECTED) { 769 if (nam) { 770 m_freem(m); 771 error = EISCONN; 772 goto out; 773 } 774 /* XXX */ 775 bzero(&tmp, sizeof(tmp)); 776 tmp.sin6_family = AF_INET6; 777 tmp.sin6_len = sizeof(struct sockaddr_in6); 778 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 779 sizeof(struct in6_addr)); 780 dst = &tmp; 781 } else { 782 if (nam == NULL) { 783 m_freem(m); 784 error = ENOTCONN; 785 goto out; 786 } 787 tmp = *(struct sockaddr_in6 *)nam; 788 dst = &tmp; 789 } 790 #ifdef ENABLE_DEFAULT_SCOPE 791 if (dst->sin6_scope_id == 0) { /* not change if specified */ 792 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 793 } 794 #endif 795 error = rip6_output(m, so, dst, control); 796 out: 797 lwkt_replymsg(&msg->send.base.lmsg, error); 798 } 799 800 struct pr_usrreqs rip6_usrreqs = { 801 .pru_abort = rip6_abort, 802 .pru_accept = pr_generic_notsupp, 803 .pru_attach = rip6_attach, 804 .pru_bind = rip6_bind, 805 .pru_connect = rip6_connect, 806 .pru_connect2 = pr_generic_notsupp, 807 .pru_control = in6_control_dispatch, 808 .pru_detach = rip6_detach, 809 .pru_disconnect = rip6_disconnect, 810 .pru_listen = pr_generic_notsupp, 811 .pru_peeraddr = in6_setpeeraddr_dispatch, 812 .pru_rcvd = pr_generic_notsupp, 813 .pru_rcvoob = pr_generic_notsupp, 814 .pru_send = rip6_send, 815 .pru_sense = pru_sense_null, 816 .pru_shutdown = rip6_shutdown, 817 .pru_sockaddr = in6_setsockaddr_dispatch, 818 .pru_sosend = sosend, 819 .pru_soreceive = soreceive 820 };
Cache object: a6a04ccf289e2ae4f2456bcde08a69ce
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