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 * $FreeBSD$ 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #include "opt_ipsec.h" 68 69 #include <stddef.h> 70 71 #include <sys/param.h> 72 #include <sys/malloc.h> 73 #include <sys/proc.h> 74 #include <sys/mbuf.h> 75 #include <sys/socket.h> 76 #include <sys/protosw.h> 77 #include <sys/socketvar.h> 78 #include <sys/errno.h> 79 #include <sys/systm.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/in_systm.h> 88 #include <netinet/ip6.h> 89 #include <netinet6/ip6_var.h> 90 #include <netinet6/ip6_mroute.h> 91 #include <netinet/icmp6.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet6/in6_pcb.h> 94 #include <netinet6/nd6.h> 95 #include <netinet6/ip6protosw.h> 96 #ifdef ENABLE_DEFAULT_SCOPE 97 #include <netinet6/scope6_var.h> 98 #endif 99 100 #ifdef IPSEC 101 #include <netinet6/ipsec.h> 102 #include <netinet6/ipsec6.h> 103 #endif /*IPSEC*/ 104 105 #include <machine/stdarg.h> 106 107 #include "faith.h" 108 109 #define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 110 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 111 112 /* 113 * Raw interface to IP6 protocol. 114 */ 115 116 extern struct inpcbhead ripcb; 117 extern struct inpcbinfo ripcbinfo; 118 extern u_long rip_sendspace; 119 extern u_long rip_recvspace; 120 121 /* 122 * Setup generic address and protocol structures 123 * for raw_input routine, then pass them along with 124 * mbuf chain. 125 */ 126 int 127 rip6_input(mp, offp, proto) 128 struct mbuf **mp; 129 int *offp, proto; 130 { 131 struct mbuf *m = *mp; 132 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 133 register struct inpcb *in6p; 134 struct inpcb *last = 0; 135 struct mbuf *opts = 0; 136 struct sockaddr_in6 rip6src; 137 138 #if defined(NFAITH) && 0 < NFAITH 139 if (m->m_pkthdr.rcvif) { 140 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 141 /* XXX send icmp6 host/port unreach? */ 142 m_freem(m); 143 return IPPROTO_DONE; 144 } 145 } 146 #endif 147 init_sin6(&rip6src, m); /* general init */ 148 149 LIST_FOREACH(in6p, &ripcb, inp_list) { 150 if ((in6p->in6p_vflag & INP_IPV6) == 0) 151 continue; 152 if (in6p->in6p_ip6_nxt && 153 in6p->in6p_ip6_nxt != proto) 154 continue; 155 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 156 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 157 continue; 158 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 159 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 160 continue; 161 if (in6p->in6p_cksum != -1 162 && in6_cksum(m, ip6->ip6_nxt, *offp, 163 m->m_pkthdr.len - *offp)) { 164 /* XXX bark something */ 165 continue; 166 } 167 if (last) { 168 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 169 if (n) { 170 if (last->in6p_flags & IN6P_CONTROLOPTS || 171 last->in6p_socket->so_options & SO_TIMESTAMP) 172 ip6_savecontrol(last, &opts, ip6, n); 173 /* strip intermediate headers */ 174 m_adj(n, *offp); 175 if (sbappendaddr(&last->in6p_socket->so_rcv, 176 (struct sockaddr *)&rip6src, 177 n, opts) == 0) { 178 /* should notify about lost packet */ 179 m_freem(n); 180 if (opts) 181 m_freem(opts); 182 } else 183 sorwakeup(last->in6p_socket); 184 opts = NULL; 185 } 186 } 187 last = in6p; 188 } 189 if (last) { 190 if (last->in6p_flags & IN6P_CONTROLOPTS || 191 last->in6p_socket->so_options & SO_TIMESTAMP) 192 ip6_savecontrol(last, &opts, ip6, m); 193 /* strip intermediate headers */ 194 m_adj(m, *offp); 195 if (sbappendaddr(&last->in6p_socket->so_rcv, 196 (struct sockaddr *)&rip6src, m, opts) == 0) { 197 m_freem(m); 198 if (opts) 199 m_freem(opts); 200 } else 201 sorwakeup(last->in6p_socket); 202 } else { 203 if (proto == IPPROTO_NONE) 204 m_freem(m); 205 else { 206 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 207 icmp6_error(m, ICMP6_PARAM_PROB, 208 ICMP6_PARAMPROB_NEXTHEADER, 209 prvnxtp - mtod(m, char *)); 210 } 211 ip6stat.ip6s_delivered--; 212 } 213 return IPPROTO_DONE; 214 } 215 216 void 217 rip6_ctlinput(cmd, sa, d) 218 int cmd; 219 struct sockaddr *sa; 220 void *d; 221 { 222 struct sockaddr_in6 sa6; 223 struct ip6_hdr *ip6; 224 struct mbuf *m; 225 int off = 0; 226 void (*notify) __P((struct inpcb *, int)) = in6_rtchange; 227 228 if (sa->sa_family != AF_INET6 || 229 sa->sa_len != sizeof(struct sockaddr_in6)) 230 return; 231 232 if ((unsigned)cmd >= PRC_NCMDS) 233 return; 234 if (PRC_IS_REDIRECT(cmd)) 235 notify = in6_rtchange, d = NULL; 236 else if (cmd == PRC_HOSTDEAD) 237 d = NULL; 238 else if (inet6ctlerrmap[cmd] == 0) 239 return; 240 241 /* if the parameter is from icmp6, decode it. */ 242 if (d != NULL) { 243 struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d; 244 m = ip6cp->ip6c_m; 245 ip6 = ip6cp->ip6c_ip6; 246 off = ip6cp->ip6c_off; 247 } else { 248 m = NULL; 249 ip6 = NULL; 250 } 251 252 /* translate addresses into internal form */ 253 sa6 = *(struct sockaddr_in6 *)sa; 254 if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) && m && m->m_pkthdr.rcvif) 255 sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); 256 257 if (ip6) { 258 /* 259 * XXX: We assume that when IPV6 is non NULL, 260 * M and OFF are valid. 261 */ 262 struct in6_addr s; 263 264 /* translate addresses into internal form */ 265 memcpy(&s, &ip6->ip6_src, sizeof(s)); 266 if (IN6_IS_ADDR_LINKLOCAL(&s)) 267 s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index); 268 269 (void) in6_pcbnotify(&ripcb, (struct sockaddr *)&sa6, 270 0, &s, 0, cmd, notify); 271 } else 272 (void) in6_pcbnotify(&ripcb, (struct sockaddr *)&sa6, 0, 273 &zeroin6_addr, 0, cmd, notify); 274 } 275 276 /* 277 * Generate IPv6 header and pass packet to ip6_output. 278 * Tack on options user may have setup with control call. 279 */ 280 int 281 #if __STDC__ 282 rip6_output(struct mbuf *m, ...) 283 #else 284 rip6_output(m, va_alist) 285 struct mbuf *m; 286 va_dcl 287 #endif 288 { 289 struct socket *so; 290 struct sockaddr_in6 *dstsock; 291 struct mbuf *control; 292 struct in6_addr *dst; 293 struct ip6_hdr *ip6; 294 struct inpcb *in6p; 295 u_int plen = m->m_pkthdr.len; 296 int error = 0; 297 struct ip6_pktopts opt, *optp = 0; 298 struct ifnet *oifp = NULL; 299 int type = 0, code = 0; /* for ICMPv6 output statistics only */ 300 int priv = 0; 301 va_list ap; 302 303 va_start(ap, m); 304 so = va_arg(ap, struct socket *); 305 dstsock = va_arg(ap, struct sockaddr_in6 *); 306 control = va_arg(ap, struct mbuf *); 307 va_end(ap); 308 309 in6p = sotoin6pcb(so); 310 311 priv = 0; 312 if (so->so_cred->cr_uid == 0) 313 priv = 1; 314 dst = &dstsock->sin6_addr; 315 if (control) { 316 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 317 goto bad; 318 optp = &opt; 319 } else 320 optp = in6p->in6p_outputopts; 321 322 /* 323 * For an ICMPv6 packet, we should know its type and code 324 * to update statistics. 325 */ 326 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 327 struct icmp6_hdr *icmp6; 328 if (m->m_len < sizeof(struct icmp6_hdr) && 329 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 330 error = ENOBUFS; 331 goto bad; 332 } 333 icmp6 = mtod(m, struct icmp6_hdr *); 334 type = icmp6->icmp6_type; 335 code = icmp6->icmp6_code; 336 } 337 338 M_PREPEND(m, sizeof(*ip6), M_WAIT); 339 ip6 = mtod(m, struct ip6_hdr *); 340 341 /* 342 * Next header might not be ICMP6 but use its pseudo header anyway. 343 */ 344 ip6->ip6_dst = *dst; 345 346 /* 347 * If the scope of the destination is link-local, embed the interface 348 * index in the address. 349 * 350 * XXX advanced-api value overrides sin6_scope_id 351 */ 352 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 353 struct in6_pktinfo *pi; 354 355 /* 356 * XXX Boundary check is assumed to be already done in 357 * ip6_setpktoptions(). 358 */ 359 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) { 360 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex); 361 oifp = ifindex2ifnet[pi->ipi6_ifindex]; 362 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 363 in6p->in6p_moptions && 364 in6p->in6p_moptions->im6o_multicast_ifp) { 365 oifp = in6p->in6p_moptions->im6o_multicast_ifp; 366 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index); 367 } else if (dstsock->sin6_scope_id) { 368 /* boundary check */ 369 if (dstsock->sin6_scope_id < 0 370 || if_index < dstsock->sin6_scope_id) { 371 error = ENXIO; /* XXX EINVAL? */ 372 goto bad; 373 } 374 ip6->ip6_dst.s6_addr16[1] 375 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/ 376 } 377 } 378 379 /* 380 * Source address selection. 381 */ 382 { 383 struct in6_addr *in6a; 384 385 if ((in6a = in6_selectsrc(dstsock, optp, 386 in6p->in6p_moptions, 387 &in6p->in6p_route, 388 &in6p->in6p_laddr, 389 &error)) == 0) { 390 if (error == 0) 391 error = EADDRNOTAVAIL; 392 goto bad; 393 } 394 ip6->ip6_src = *in6a; 395 if (in6p->in6p_route.ro_rt) 396 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index]; 397 } 398 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 399 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 400 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 401 (IPV6_VERSION & IPV6_VERSION_MASK); 402 /* ip6_plen will be filled in ip6_output, so not fill it here. */ 403 ip6->ip6_nxt = in6p->in6p_ip6_nxt; 404 ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 405 406 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 407 in6p->in6p_cksum != -1) { 408 struct mbuf *n; 409 int off; 410 u_int16_t *p; 411 412 #define offsetof(type, member) ((size_t)(&((type *)0)->member)) /* XXX */ 413 414 /* compute checksum */ 415 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 416 off = offsetof(struct icmp6_hdr, icmp6_cksum); 417 else 418 off = in6p->in6p_cksum; 419 if (plen < off + 1) { 420 error = EINVAL; 421 goto bad; 422 } 423 off += sizeof(struct ip6_hdr); 424 425 n = m; 426 while (n && n->m_len <= off) { 427 off -= n->m_len; 428 n = n->m_next; 429 } 430 if (!n) 431 goto bad; 432 p = (u_int16_t *)(mtod(n, caddr_t) + off); 433 *p = 0; 434 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 435 } 436 437 #ifdef IPSEC 438 ipsec_setsocket(m, so); 439 #endif /*IPSEC*/ 440 441 error = ip6_output(m, optp, &in6p->in6p_route, 0, 442 in6p->in6p_moptions, &oifp); 443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 444 if (oifp) 445 icmp6_ifoutstat_inc(oifp, type, code); 446 icmp6stat.icp6s_outhist[type]++; 447 } 448 449 goto freectl; 450 451 bad: 452 if (m) 453 m_freem(m); 454 455 freectl: 456 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) 457 RTFREE(optp->ip6po_route.ro_rt); 458 if (control) 459 m_freem(control); 460 return(error); 461 } 462 463 /* 464 * Raw IPv6 socket option processing. 465 */ 466 int 467 rip6_ctloutput(so, sopt) 468 struct socket *so; 469 struct sockopt *sopt; 470 { 471 int error; 472 473 if (sopt->sopt_level == IPPROTO_ICMPV6) 474 /* 475 * XXX: is it better to call icmp6_ctloutput() directly 476 * from protosw? 477 */ 478 return(icmp6_ctloutput(so, sopt)); 479 else if (sopt->sopt_level != IPPROTO_IPV6) 480 return (EINVAL); 481 482 error = 0; 483 484 switch (sopt->sopt_dir) { 485 case SOPT_GET: 486 switch (sopt->sopt_name) { 487 case MRT6_INIT: 488 case MRT6_DONE: 489 case MRT6_ADD_MIF: 490 case MRT6_DEL_MIF: 491 case MRT6_ADD_MFC: 492 case MRT6_DEL_MFC: 493 case MRT6_PIM: 494 error = ip6_mrouter_get(so, sopt); 495 break; 496 default: 497 error = ip6_ctloutput(so, sopt); 498 break; 499 } 500 break; 501 502 case SOPT_SET: 503 switch (sopt->sopt_name) { 504 case MRT6_INIT: 505 case MRT6_DONE: 506 case MRT6_ADD_MIF: 507 case MRT6_DEL_MIF: 508 case MRT6_ADD_MFC: 509 case MRT6_DEL_MFC: 510 case MRT6_PIM: 511 error = ip6_mrouter_set(so, sopt); 512 break; 513 default: 514 error = ip6_ctloutput(so, sopt); 515 break; 516 } 517 break; 518 } 519 520 return (error); 521 } 522 523 static int 524 rip6_attach(struct socket *so, int proto, struct proc *p) 525 { 526 struct inpcb *inp; 527 int error, s; 528 529 inp = sotoinpcb(so); 530 if (inp) 531 panic("rip6_attach"); 532 if (p && (error = suser(p)) != 0) 533 return error; 534 535 error = soreserve(so, rip_sendspace, rip_recvspace); 536 if (error) 537 return error; 538 s = splnet(); 539 error = in_pcballoc(so, &ripcbinfo, p); 540 splx(s); 541 if (error) 542 return error; 543 inp = (struct inpcb *)so->so_pcb; 544 inp->inp_vflag |= INP_IPV6; 545 inp->in6p_ip6_nxt = (long)proto; 546 inp->in6p_hops = -1; /* use kernel default */ 547 inp->in6p_cksum = -1; 548 #ifdef IPSEC 549 error = ipsec_init_policy(so, &inp->in6p_sp); 550 if (error != 0) { 551 in6_pcbdetach(inp); 552 return (error); 553 } 554 #endif /*IPSEC*/ 555 MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *, 556 sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 557 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 558 return 0; 559 } 560 561 static int 562 rip6_detach(struct socket *so) 563 { 564 struct inpcb *inp; 565 566 inp = sotoinpcb(so); 567 if (inp == 0) 568 panic("rip6_detach"); 569 /* xxx: RSVP */ 570 if (so == ip6_mrouter) 571 ip6_mrouter_done(); 572 if (inp->in6p_icmp6filt) { 573 FREE(inp->in6p_icmp6filt, M_PCB); 574 inp->in6p_icmp6filt = NULL; 575 } 576 in6_pcbdetach(inp); 577 return 0; 578 } 579 580 static int 581 rip6_abort(struct socket *so) 582 { 583 soisdisconnected(so); 584 return rip6_detach(so); 585 } 586 587 static int 588 rip6_disconnect(struct socket *so) 589 { 590 struct inpcb *inp = sotoinpcb(so); 591 592 if ((so->so_state & SS_ISCONNECTED) == 0) 593 return ENOTCONN; 594 inp->in6p_faddr = in6addr_any; 595 return rip6_abort(so); 596 } 597 598 static int 599 rip6_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 600 { 601 struct inpcb *inp = sotoinpcb(so); 602 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 603 struct ifaddr *ia = NULL; 604 605 if (nam->sa_len != sizeof(*addr)) 606 return EINVAL; 607 608 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 609 return EADDRNOTAVAIL; 610 #ifdef ENABLE_DEFAULT_SCOPE 611 if (addr->sin6_scope_id == 0) { /* not change if specified */ 612 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 613 } 614 #endif 615 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 616 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 617 return EADDRNOTAVAIL; 618 if (ia && 619 ((struct in6_ifaddr *)ia)->ia6_flags & 620 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 621 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 622 return(EADDRNOTAVAIL); 623 } 624 inp->in6p_laddr = addr->sin6_addr; 625 return 0; 626 } 627 628 static int 629 rip6_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 630 { 631 struct inpcb *inp = sotoinpcb(so); 632 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 633 struct in6_addr *in6a = NULL; 634 int error = 0; 635 #ifdef ENABLE_DEFAULT_SCOPE 636 struct sockaddr_in6 tmp; 637 #endif 638 639 if (nam->sa_len != sizeof(*addr)) 640 return EINVAL; 641 if (TAILQ_EMPTY(&ifnet)) 642 return EADDRNOTAVAIL; 643 if (addr->sin6_family != AF_INET6) 644 return EAFNOSUPPORT; 645 #ifdef ENABLE_DEFAULT_SCOPE 646 if (addr->sin6_scope_id == 0) { /* not change if specified */ 647 /* avoid overwrites */ 648 tmp = *addr; 649 addr = &tmp; 650 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr); 651 } 652 #endif 653 /* Source address selection. XXX: need pcblookup? */ 654 in6a = in6_selectsrc(addr, inp->in6p_outputopts, 655 inp->in6p_moptions, &inp->in6p_route, 656 &inp->in6p_laddr, &error); 657 if (in6a == NULL) 658 return (error ? error : EADDRNOTAVAIL); 659 inp->in6p_laddr = *in6a; 660 inp->in6p_faddr = addr->sin6_addr; 661 soisconnected(so); 662 return 0; 663 } 664 665 static int 666 rip6_shutdown(struct socket *so) 667 { 668 socantsendmore(so); 669 return 0; 670 } 671 672 static int 673 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 674 struct mbuf *control, struct proc *p) 675 { 676 struct inpcb *inp = sotoinpcb(so); 677 struct sockaddr_in6 tmp; 678 struct sockaddr_in6 *dst; 679 680 /* always copy sockaddr to avoid overwrites */ 681 if (so->so_state & SS_ISCONNECTED) { 682 if (nam) { 683 m_freem(m); 684 return EISCONN; 685 } 686 /* XXX */ 687 bzero(&tmp, sizeof(tmp)); 688 tmp.sin6_family = AF_INET6; 689 tmp.sin6_len = sizeof(struct sockaddr_in6); 690 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 691 sizeof(struct in6_addr)); 692 dst = &tmp; 693 } else { 694 if (nam == NULL) { 695 m_freem(m); 696 return ENOTCONN; 697 } 698 tmp = *(struct sockaddr_in6 *)nam; 699 dst = &tmp; 700 } 701 #ifdef ENABLE_DEFAULT_SCOPE 702 if (dst->sin6_scope_id == 0) { /* not change if specified */ 703 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr); 704 } 705 #endif 706 return rip6_output(m, so, dst, control); 707 } 708 709 struct pr_usrreqs rip6_usrreqs = { 710 rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect, 711 pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect, 712 pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp, 713 pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown, 714 in6_setsockaddr, sosend, soreceive, sopoll 715 }; 716