raw_ip6.c revision 1.31.2.5
1 /* $NetBSD: raw_ip6.c,v 1.31.2.5 2001/10/22 20:42:05 nathanw Exp $ */ 2 /* $KAME: raw_ip6.c,v 1.82 2001/07/23 18:57:56 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 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 70 #include <sys/param.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/protosw.h> 75 #include <sys/socketvar.h> 76 #include <sys/errno.h> 77 #include <sys/systm.h> 78 #include <sys/lwp.h> 79 #include <sys/proc.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/if_types.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.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 <netinet6/in6_pcb.h> 92 #include <netinet6/nd6.h> 93 #include <netinet6/ip6protosw.h> 94 #ifdef ENABLE_DEFAULT_SCOPE 95 #include <netinet6/scope6_var.h> 96 #endif 97 #include <netinet6/raw_ip6.h> 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #endif /*IPSEC*/ 102 103 #include <machine/stdarg.h> 104 105 #include "faith.h" 106 #if defined(NFAITH) && 0 < NFAITH 107 #include <net/if_faith.h> 108 #endif 109 110 struct in6pcb rawin6pcb; 111 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 112 113 /* 114 * Raw interface to IP6 protocol. 115 */ 116 117 struct rip6stat rip6stat; 118 119 /* 120 * Initialize raw connection block queue. 121 */ 122 void 123 rip6_init() 124 { 125 rawin6pcb.in6p_next = rawin6pcb.in6p_prev = &rawin6pcb; 126 } 127 128 /* 129 * Setup generic address and protocol structures 130 * for raw_input routine, then pass them along with 131 * mbuf chain. 132 */ 133 int 134 rip6_input(mp, offp, proto) 135 struct mbuf **mp; 136 int *offp, proto; 137 { 138 struct mbuf *m = *mp; 139 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 140 struct in6pcb *in6p; 141 struct in6pcb *last = NULL; 142 struct sockaddr_in6 rip6src; 143 struct mbuf *opts = NULL; 144 145 rip6stat.rip6s_ipackets++; 146 147 #if defined(NFAITH) && 0 < NFAITH 148 if (faithprefix(&ip6->ip6_dst)) { 149 /* send icmp6 host unreach? */ 150 m_freem(m); 151 return IPPROTO_DONE; 152 } 153 #endif 154 155 /* Be proactive about malicious use of IPv4 mapped address */ 156 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 157 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 158 /* XXX stat */ 159 m_freem(m); 160 return IPPROTO_DONE; 161 } 162 163 bzero(&rip6src, sizeof(rip6src)); 164 rip6src.sin6_len = sizeof(struct sockaddr_in6); 165 rip6src.sin6_family = AF_INET6; 166 #if 0 /* XXX inbound flowlabel */ 167 rip6src.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 168 #endif 169 /* KAME hack: recover scopeid */ 170 (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif); 171 172 for (in6p = rawin6pcb.in6p_next; 173 in6p != &rawin6pcb; in6p = in6p->in6p_next) 174 { 175 if (in6p->in6p_ip6.ip6_nxt && 176 in6p->in6p_ip6.ip6_nxt != proto) 177 continue; 178 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 179 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 180 continue; 181 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 182 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 183 continue; 184 if (in6p->in6p_cksum != -1) { 185 rip6stat.rip6s_isum++; 186 if (in6_cksum(m, ip6->ip6_nxt, *offp, 187 m->m_pkthdr.len - *offp)) { 188 rip6stat.rip6s_badsum++; 189 continue; 190 } 191 } 192 if (last) { 193 struct mbuf *n; 194 195 #ifdef IPSEC 196 /* 197 * Check AH/ESP integrity. 198 */ 199 if (ipsec6_in_reject(m, last)) { 200 ipsec6stat.in_polvio++; 201 /* do not inject data into pcb */ 202 } else 203 #endif /*IPSEC*/ 204 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 205 if (last->in6p_flags & IN6P_CONTROLOPTS) 206 ip6_savecontrol(last, &opts, ip6, n); 207 /* strip intermediate headers */ 208 m_adj(n, *offp); 209 if (sbappendaddr(&last->in6p_socket->so_rcv, 210 (struct sockaddr *)&rip6src, 211 n, opts) == 0) { 212 /* should notify about lost packet */ 213 m_freem(n); 214 if (opts) 215 m_freem(opts); 216 rip6stat.rip6s_fullsock++; 217 } else 218 sorwakeup(last->in6p_socket); 219 opts = NULL; 220 } 221 } 222 last = in6p; 223 } 224 #ifdef IPSEC 225 /* 226 * Check AH/ESP integrity. 227 */ 228 if (last && ipsec6_in_reject(m, last)) { 229 m_freem(m); 230 ipsec6stat.in_polvio++; 231 ip6stat.ip6s_delivered--; 232 /* do not inject data into pcb */ 233 } else 234 #endif /*IPSEC*/ 235 if (last) { 236 if (last->in6p_flags & IN6P_CONTROLOPTS) 237 ip6_savecontrol(last, &opts, ip6, m); 238 /* strip intermediate headers */ 239 m_adj(m, *offp); 240 if (sbappendaddr(&last->in6p_socket->so_rcv, 241 (struct sockaddr *)&rip6src, m, opts) == 0) { 242 m_freem(m); 243 if (opts) 244 m_freem(opts); 245 rip6stat.rip6s_fullsock++; 246 } else 247 sorwakeup(last->in6p_socket); 248 } else { 249 rip6stat.rip6s_nosock++; 250 if (m->m_flags & M_MCAST) 251 rip6stat.rip6s_nosockmcast++; 252 if (proto == IPPROTO_NONE) 253 m_freem(m); 254 else { 255 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 256 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_protounknown); 257 icmp6_error(m, ICMP6_PARAM_PROB, 258 ICMP6_PARAMPROB_NEXTHEADER, 259 prvnxtp - mtod(m, char *)); 260 } 261 ip6stat.ip6s_delivered--; 262 } 263 return IPPROTO_DONE; 264 } 265 266 void 267 rip6_ctlinput(cmd, sa, d) 268 int cmd; 269 struct sockaddr *sa; 270 void *d; 271 { 272 struct ip6_hdr *ip6; 273 struct mbuf *m; 274 int off; 275 struct ip6ctlparam *ip6cp = NULL; 276 const struct sockaddr_in6 *sa6_src = NULL; 277 void *cmdarg; 278 void (*notify) __P((struct in6pcb *, int)) = in6_rtchange; 279 int nxt; 280 281 if (sa->sa_family != AF_INET6 || 282 sa->sa_len != sizeof(struct sockaddr_in6)) 283 return; 284 285 if ((unsigned)cmd >= PRC_NCMDS) 286 return; 287 if (PRC_IS_REDIRECT(cmd)) 288 notify = in6_rtchange, d = NULL; 289 else if (cmd == PRC_HOSTDEAD) 290 d = NULL; 291 else if (cmd == PRC_MSGSIZE) 292 ; /* special code is present, see below */ 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 cmdarg = ip6cp->ip6c_cmdarg; 303 sa6_src = ip6cp->ip6c_src; 304 nxt = ip6cp->ip6c_nxt; 305 } else { 306 m = NULL; 307 ip6 = NULL; 308 cmdarg = NULL; 309 sa6_src = &sa6_any; 310 nxt = -1; 311 } 312 313 if (ip6 && cmd == PRC_MSGSIZE) { 314 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 315 int valid = 0; 316 struct in6pcb *in6p; 317 318 /* 319 * Check to see if we have a valid raw IPv6 socket 320 * corresponding to the address in the ICMPv6 message 321 * payload, and the protocol (ip6_nxt) meets the socket. 322 * XXX chase extension headers, or pass final nxt value 323 * from icmp6_notify_error() 324 */ 325 in6p = NULL; 326 in6p = in6_pcblookup_connect(&rawin6pcb, 327 &sa6->sin6_addr, 0, 328 (struct in6_addr *)&sa6_src->sin6_addr, 0, 0); 329 #if 0 330 if (!in6p) { 331 /* 332 * As the use of sendto(2) is fairly popular, 333 * we may want to allow non-connected pcb too. 334 * But it could be too weak against attacks... 335 * We should at least check if the local 336 * address (= s) is really ours. 337 */ 338 in6p = in6_pcblookup_bind(&rawin6pcb, 339 &sa6->sin6_addr, 0, 0)) 340 } 341 #endif 342 343 if (in6p && in6p->in6p_ip6.ip6_nxt && 344 in6p->in6p_ip6.ip6_nxt == nxt) 345 valid++; 346 347 /* 348 * Depending on the value of "valid" and routing table 349 * size (mtudisc_{hi,lo}wat), we will: 350 * - recalcurate the new MTU and create the 351 * corresponding routing entry, or 352 * - ignore the MTU change notification. 353 */ 354 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 355 356 /* 357 * regardless of if we called icmp6_mtudisc_update(), 358 * we need to call in6_pcbnotify(), to notify path 359 * MTU change to the userland (2292bis-02), because 360 * some unconnected sockets may share the same 361 * destination and want to know the path MTU. 362 */ 363 } 364 365 (void) in6_pcbnotify(&rawin6pcb, sa, 0, 366 (struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 367 } 368 369 /* 370 * Generate IPv6 header and pass packet to ip6_output. 371 * Tack on options user may have setup with control call. 372 */ 373 int 374 #if __STDC__ 375 rip6_output(struct mbuf *m, ...) 376 #else 377 rip6_output(m, va_alist) 378 struct mbuf *m; 379 va_dcl 380 #endif 381 { 382 struct socket *so; 383 struct sockaddr_in6 *dstsock; 384 struct mbuf *control; 385 struct in6_addr *dst; 386 struct ip6_hdr *ip6; 387 struct in6pcb *in6p; 388 u_int plen = m->m_pkthdr.len; 389 int error = 0; 390 struct ip6_pktopts opt, *optp = NULL, *origoptp; 391 struct ifnet *oifp = NULL; 392 int type, code; /* for ICMPv6 output statistics only */ 393 int priv = 0; 394 va_list ap; 395 int flags; 396 397 va_start(ap, m); 398 so = va_arg(ap, struct socket *); 399 dstsock = va_arg(ap, struct sockaddr_in6 *); 400 control = va_arg(ap, struct mbuf *); 401 va_end(ap); 402 403 in6p = sotoin6pcb(so); 404 405 priv = 0; 406 { 407 struct proc *p = (curproc ? curproc->l_proc : 0); /* XXX */ 408 409 if (p && !suser(p->p_ucred, &p->p_acflag)) 410 priv = 1; 411 } 412 dst = &dstsock->sin6_addr; 413 if (control) { 414 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 415 goto bad; 416 optp = &opt; 417 } else 418 optp = in6p->in6p_outputopts; 419 420 /* 421 * For an ICMPv6 packet, we should know its type and code 422 * to update statistics. 423 */ 424 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 425 struct icmp6_hdr *icmp6; 426 if (m->m_len < sizeof(struct icmp6_hdr) && 427 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 428 error = ENOBUFS; 429 goto bad; 430 } 431 icmp6 = mtod(m, struct icmp6_hdr *); 432 type = icmp6->icmp6_type; 433 code = icmp6->icmp6_code; 434 } 435 436 M_PREPEND(m, sizeof(*ip6), M_WAIT); 437 ip6 = mtod(m, struct ip6_hdr *); 438 439 /* 440 * Next header might not be ICMP6 but use its pseudo header anyway. 441 */ 442 ip6->ip6_dst = *dst; 443 444 /* KAME hack: embed scopeid */ 445 origoptp = in6p->in6p_outputopts; 446 in6p->in6p_outputopts = optp; 447 if (in6_embedscope(&ip6->ip6_dst, dstsock, in6p, &oifp) != 0) { 448 error = EINVAL; 449 goto bad; 450 } 451 in6p->in6p_outputopts = origoptp; 452 453 /* 454 * Source address selection. 455 */ 456 { 457 struct in6_addr *in6a; 458 459 if ((in6a = in6_selectsrc(dstsock, optp, 460 in6p->in6p_moptions, 461 &in6p->in6p_route, 462 &in6p->in6p_laddr, 463 &error)) == 0) { 464 if (error == 0) 465 error = EADDRNOTAVAIL; 466 goto bad; 467 } 468 ip6->ip6_src = *in6a; 469 if (in6p->in6p_route.ro_rt) { 470 /* what if oifp contradicts ? */ 471 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 472 } 473 } 474 475 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 476 ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 477 ip6->ip6_vfc |= IPV6_VERSION; 478 #if 0 /* ip6_plen will be filled in ip6_output. */ 479 ip6->ip6_plen = htons((u_short)plen); 480 #endif 481 ip6->ip6_nxt = in6p->in6p_ip6.ip6_nxt; 482 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 483 484 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 485 in6p->in6p_cksum != -1) { 486 int off; 487 u_int16_t sum; 488 489 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */ 490 491 /* compute checksum */ 492 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 493 off = offsetof(struct icmp6_hdr, icmp6_cksum); 494 else 495 off = in6p->in6p_cksum; 496 if (plen < off + 1) { 497 error = EINVAL; 498 goto bad; 499 } 500 off += sizeof(struct ip6_hdr); 501 502 sum = 0; 503 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 504 sum = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 505 m_copyback(m, off, sizeof(sum), (caddr_t)&sum); 506 } 507 508 #ifdef IPSEC 509 if (ipsec_setsocket(m, so) != 0) { 510 error = ENOBUFS; 511 goto bad; 512 } 513 #endif /*IPSEC*/ 514 515 flags = 0; 516 #ifdef IPV6_MINMTU 517 if (in6p->in6p_flags & IN6P_MINMTU) 518 flags |= IPV6_MINMTU; 519 #endif 520 521 error = ip6_output(m, optp, &in6p->in6p_route, flags, 522 in6p->in6p_moptions, &oifp); 523 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 524 if (oifp) 525 icmp6_ifoutstat_inc(oifp, type, code); 526 icmp6stat.icp6s_outhist[type]++; 527 } else 528 rip6stat.rip6s_opackets++; 529 530 goto freectl; 531 532 bad: 533 if (m) 534 m_freem(m); 535 536 freectl: 537 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 538 RTFREE(optp->ip6po_route.ro_rt); 539 if (control) 540 m_freem(control); 541 return(error); 542 } 543 544 /* 545 * Raw IPv6 socket option processing. 546 */ 547 int 548 rip6_ctloutput(op, so, level, optname, mp) 549 int op; 550 struct socket *so; 551 int level, optname; 552 struct mbuf **mp; 553 { 554 int error = 0; 555 int optval; 556 struct in6pcb *in6p; 557 struct mbuf *m; 558 const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum); 559 560 switch (level) { 561 case IPPROTO_IPV6: 562 switch (optname) { 563 case MRT6_INIT: 564 case MRT6_DONE: 565 case MRT6_ADD_MIF: 566 case MRT6_DEL_MIF: 567 case MRT6_ADD_MFC: 568 case MRT6_DEL_MFC: 569 case MRT6_PIM: 570 if (op == PRCO_SETOPT) { 571 error = ip6_mrouter_set(optname, so, *mp); 572 if (*mp) 573 (void)m_free(*mp); 574 } else if (op == PRCO_GETOPT) 575 error = ip6_mrouter_get(optname, so, mp); 576 else 577 error = EINVAL; 578 return (error); 579 case IPV6_CHECKSUM: 580 /* 581 * for ICMPv6 sockets, no modification allowed for 582 * checksum offset, permit "no change" values to 583 * help existing apps. 584 */ 585 in6p = sotoin6pcb(so); 586 error = 0; 587 if (op == PRCO_SETOPT) { 588 m = *mp; 589 if (m && m->m_len == sizeof(int)) { 590 optval = *mtod(m, int *); 591 if (so->so_proto->pr_protocol == 592 IPPROTO_ICMPV6) { 593 if (optval != icmp6off) 594 error = EINVAL; 595 } else 596 in6p->in6p_cksum = optval; 597 } else 598 error = EINVAL; 599 if (m) 600 m_free(m); 601 } else if (op == PRCO_GETOPT) { 602 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 603 optval = icmp6off; 604 else 605 optval = in6p->in6p_cksum; 606 *mp = m = m_get(M_WAIT, MT_SOOPTS); 607 m->m_len = sizeof(int); 608 *mtod(m, int *) = optval; 609 } else 610 error = EINVAL; 611 return error; 612 default: 613 return (ip6_ctloutput(op, so, level, optname, mp)); 614 } 615 616 case IPPROTO_ICMPV6: 617 /* 618 * XXX: is it better to call icmp6_ctloutput() directly 619 * from protosw? 620 */ 621 return(icmp6_ctloutput(op, so, level, optname, mp)); 622 623 default: 624 if (op == PRCO_SETOPT && *mp) 625 m_free(*mp); 626 return EINVAL; 627 } 628 } 629 630 extern u_long rip6_sendspace; 631 extern u_long rip6_recvspace; 632 633 int 634 rip6_usrreq(so, req, m, nam, control, p) 635 struct socket *so; 636 int req; 637 struct mbuf *m, *nam, *control; 638 struct proc *p; 639 { 640 struct in6pcb *in6p = sotoin6pcb(so); 641 int s; 642 int error = 0; 643 /* extern struct socket *ip6_mrouter; */ /* xxx */ 644 int priv; 645 646 priv = 0; 647 if (p && !suser(p->p_ucred, &p->p_acflag)) 648 priv++; 649 650 if (req == PRU_CONTROL) 651 return (in6_control(so, (u_long)m, (caddr_t)nam, 652 (struct ifnet *)control, p)); 653 654 if (req == PRU_PURGEIF) { 655 in6_pcbpurgeif0(&rawin6pcb, (struct ifnet *)control); 656 in6_purgeif((struct ifnet *)control); 657 in6_pcbpurgeif(&rawin6pcb, (struct ifnet *)control); 658 return (0); 659 } 660 661 switch (req) { 662 case PRU_ATTACH: 663 if (in6p) 664 panic("rip6_attach"); 665 if (!priv) { 666 error = EACCES; 667 break; 668 } 669 s = splsoftnet(); 670 if ((error = soreserve(so, rip6_sendspace, rip6_recvspace)) != 0) { 671 splx(s); 672 break; 673 } 674 if ((error = in6_pcballoc(so, &rawin6pcb)) != 0) 675 { 676 splx(s); 677 break; 678 } 679 splx(s); 680 in6p = sotoin6pcb(so); 681 in6p->in6p_ip6.ip6_nxt = (long)nam; 682 in6p->in6p_cksum = -1; 683 684 MALLOC(in6p->in6p_icmp6filt, struct icmp6_filter *, 685 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 686 if (in6p->in6p_icmp6filt == NULL) { 687 in6_pcbdetach(in6p); 688 error = ENOMEM; 689 break; 690 } 691 ICMP6_FILTER_SETPASSALL(in6p->in6p_icmp6filt); 692 break; 693 694 case PRU_DISCONNECT: 695 if ((so->so_state & SS_ISCONNECTED) == 0) { 696 error = ENOTCONN; 697 break; 698 } 699 in6p->in6p_faddr = in6addr_any; 700 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 701 break; 702 703 case PRU_ABORT: 704 soisdisconnected(so); 705 /* Fallthrough */ 706 case PRU_DETACH: 707 if (in6p == 0) 708 panic("rip6_detach"); 709 if (so == ip6_mrouter) 710 ip6_mrouter_done(); 711 /* xxx: RSVP */ 712 if (in6p->in6p_icmp6filt) { 713 FREE(in6p->in6p_icmp6filt, M_PCB); 714 in6p->in6p_icmp6filt = NULL; 715 } 716 in6_pcbdetach(in6p); 717 break; 718 719 case PRU_BIND: 720 { 721 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 722 struct ifaddr *ia = NULL; 723 724 if (nam->m_len != sizeof(*addr)) { 725 error = EINVAL; 726 break; 727 } 728 if ((ifnet.tqh_first == 0) || (addr->sin6_family != AF_INET6)) { 729 error = EADDRNOTAVAIL; 730 break; 731 } 732 #ifdef ENABLE_DEFAULT_SCOPE 733 if (addr->sin6_scope_id == 0) /* not change if specified */ 734 addr->sin6_scope_id = 735 scope6_addr2default(&addr->sin6_addr); 736 #endif 737 /* KAME hack: embed scopeid */ 738 if (in6_embedscope(&addr->sin6_addr, addr, in6p, NULL) != 0) 739 return EINVAL; 740 #ifndef SCOPEDROUTING 741 addr->sin6_scope_id = 0; /* for ifa_ifwithaddr */ 742 #endif 743 744 /* 745 * we don't support mapped address here, it would confuse 746 * users so reject it 747 */ 748 if (IN6_IS_ADDR_V4MAPPED(&addr->sin6_addr)) { 749 error = EADDRNOTAVAIL; 750 break; 751 } 752 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 753 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) { 754 error = EADDRNOTAVAIL; 755 break; 756 } 757 if (ia && 758 ((struct in6_ifaddr *)ia)->ia6_flags & 759 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 760 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 761 error = EADDRNOTAVAIL; 762 break; 763 } 764 in6p->in6p_laddr = addr->sin6_addr; 765 break; 766 } 767 768 case PRU_CONNECT: 769 { 770 struct sockaddr_in6 *addr = mtod(nam, struct sockaddr_in6 *); 771 struct in6_addr *in6a = NULL; 772 #ifdef ENABLE_DEFAULT_SCOPE 773 struct sockaddr_in6 sin6; 774 #endif 775 776 if (nam->m_len != sizeof(*addr)) { 777 error = EINVAL; 778 break; 779 } 780 if (ifnet.tqh_first == 0) 781 { 782 error = EADDRNOTAVAIL; 783 break; 784 } 785 if (addr->sin6_family != AF_INET6) { 786 error = EAFNOSUPPORT; 787 break; 788 } 789 790 #ifdef ENABLE_DEFAULT_SCOPE 791 if (addr->sin6_scope_id == 0) { 792 /* protect *addr */ 793 sin6 = *addr; 794 addr = &sin6; 795 addr->sin6_scope_id = 796 scope6_addr2default(&addr->sin6_addr); 797 } 798 #endif 799 800 /* Source address selection. XXX: need pcblookup? */ 801 in6a = in6_selectsrc(addr, in6p->in6p_outputopts, 802 in6p->in6p_moptions, 803 &in6p->in6p_route, 804 &in6p->in6p_laddr, 805 &error); 806 if (in6a == NULL) { 807 if (error == 0) 808 error = EADDRNOTAVAIL; 809 break; 810 } 811 in6p->in6p_laddr = *in6a; 812 in6p->in6p_faddr = addr->sin6_addr; 813 soisconnected(so); 814 break; 815 } 816 817 case PRU_CONNECT2: 818 error = EOPNOTSUPP; 819 break; 820 821 /* 822 * Mark the connection as being incapable of futther input. 823 */ 824 case PRU_SHUTDOWN: 825 socantsendmore(so); 826 break; 827 /* 828 * Ship a packet out. The appropriate raw output 829 * routine handles any messaging necessary. 830 */ 831 case PRU_SEND: 832 { 833 struct sockaddr_in6 tmp; 834 struct sockaddr_in6 *dst; 835 836 /* always copy sockaddr to avoid overwrites */ 837 if (so->so_state & SS_ISCONNECTED) { 838 if (nam) { 839 error = EISCONN; 840 break; 841 } 842 /* XXX */ 843 bzero(&tmp, sizeof(tmp)); 844 tmp.sin6_family = AF_INET6; 845 tmp.sin6_len = sizeof(struct sockaddr_in6); 846 bcopy(&in6p->in6p_faddr, &tmp.sin6_addr, 847 sizeof(struct in6_addr)); 848 dst = &tmp; 849 } else { 850 if (nam == NULL) { 851 error = ENOTCONN; 852 break; 853 } 854 tmp = *mtod(nam, struct sockaddr_in6 *); 855 dst = &tmp; 856 } 857 #ifdef ENABLE_DEFAULT_SCOPE 858 if (dst->sin6_scope_id == 0) { 859 dst->sin6_scope_id = 860 scope6_addr2default(&dst->sin6_addr); 861 } 862 #endif 863 error = rip6_output(m, so, dst, control); 864 m = NULL; 865 break; 866 } 867 868 case PRU_SENSE: 869 /* 870 * stat: don't bother with a blocksize 871 */ 872 return(0); 873 /* 874 * Not supported. 875 */ 876 case PRU_RCVOOB: 877 case PRU_RCVD: 878 case PRU_LISTEN: 879 case PRU_ACCEPT: 880 case PRU_SENDOOB: 881 error = EOPNOTSUPP; 882 break; 883 884 case PRU_SOCKADDR: 885 in6_setsockaddr(in6p, nam); 886 break; 887 888 case PRU_PEERADDR: 889 in6_setpeeraddr(in6p, nam); 890 break; 891 892 default: 893 panic("rip6_usrreq"); 894 } 895 if (m != NULL) 896 m_freem(m); 897 return(error); 898 } 899
Indexes created Tue Sep 30 20:09:53 GMT 2025