raw_ip.c revision 1.171.2.1
1 /* $NetBSD: raw_ip.c,v 1.171.2.1 2018/03/22 01:44:51 pgoyette Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 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 8.7 (Berkeley) 5/15/95 61 */ 62 63 /* 64 * Raw interface to IP protocol. 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: raw_ip.c,v 1.171.2.1 2018/03/22 01:44:51 pgoyette Exp $"); 69 70 #ifdef _KERNEL_OPT 71 #include "opt_inet.h" 72 #include "opt_ipsec.h" 73 #include "opt_mrouting.h" 74 #include "opt_net_mpsafe.h" 75 #endif 76 77 #include <sys/param.h> 78 #include <sys/sysctl.h> 79 #include <sys/mbuf.h> 80 #include <sys/socket.h> 81 #include <sys/protosw.h> 82 #include <sys/socketvar.h> 83 #include <sys/errno.h> 84 #include <sys/systm.h> 85 #include <sys/proc.h> 86 #include <sys/kauth.h> 87 88 #include <net/if.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/ip_var.h> 94 #include <netinet/ip_private.h> 95 #include <netinet/ip_mroute.h> 96 #include <netinet/ip_icmp.h> 97 #include <netinet/in_pcb.h> 98 #include <netinet/in_proto.h> 99 #include <netinet/in_var.h> 100 101 #ifdef IPSEC 102 #include <netipsec/ipsec.h> 103 #include <netipsec/ipsec_var.h> 104 #endif 105 106 struct inpcbtable rawcbtable; 107 108 int rip_pcbnotify(struct inpcbtable *, struct in_addr, 109 struct in_addr, int, int, void (*)(struct inpcb *, int)); 110 static int rip_connect_pcb(struct inpcb *, struct sockaddr_in *); 111 static void rip_disconnect1(struct inpcb *); 112 113 static void sysctl_net_inet_raw_setup(struct sysctllog **); 114 115 /* 116 * Nominal space allocated to a raw ip socket. 117 */ 118 #define RIPSNDQ 8192 119 #define RIPRCVQ 8192 120 121 static u_long rip_sendspace = RIPSNDQ; 122 static u_long rip_recvspace = RIPRCVQ; 123 124 /* 125 * Raw interface to IP protocol. 126 */ 127 128 /* 129 * Initialize raw connection block q. 130 */ 131 void 132 rip_init(void) 133 { 134 135 sysctl_net_inet_raw_setup(NULL); 136 in_pcbinit(&rawcbtable, 1, 1); 137 } 138 139 static void 140 rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa, 141 int hlen, struct mbuf *opts, struct mbuf *n) 142 { 143 if (last->inp_flags & INP_NOHEADER) 144 m_adj(n, hlen); 145 if (last->inp_flags & INP_CONTROLOPTS 146 || SOOPT_TIMESTAMP(last->inp_socket->so_options)) 147 ip_savecontrol(last, &opts, ip, n); 148 if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) { 149 soroverflow(last->inp_socket); 150 m_freem(n); 151 if (opts) 152 m_freem(opts); 153 } else 154 sorwakeup(last->inp_socket); 155 } 156 157 /* 158 * Setup generic address and protocol structures 159 * for raw_input routine, then pass them along with 160 * mbuf chain. 161 */ 162 void 163 rip_input(struct mbuf *m, ...) 164 { 165 int hlen, proto; 166 struct ip *ip = mtod(m, struct ip *); 167 struct inpcb_hdr *inph; 168 struct inpcb *inp; 169 struct inpcb *last = NULL; 170 struct mbuf *n, *opts = NULL; 171 struct sockaddr_in ripsrc; 172 va_list ap; 173 174 va_start(ap, m); 175 (void)va_arg(ap, int); /* ignore value, advance ap */ 176 proto = va_arg(ap, int); 177 va_end(ap); 178 179 sockaddr_in_init(&ripsrc, &ip->ip_src, 0); 180 181 /* 182 * XXX Compatibility: programs using raw IP expect ip_len 183 * XXX to have the header length subtracted, and in host order. 184 * XXX ip_off is also expected to be host order. 185 */ 186 hlen = ip->ip_hl << 2; 187 ip->ip_len = ntohs(ip->ip_len) - hlen; 188 NTOHS(ip->ip_off); 189 190 TAILQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) { 191 inp = (struct inpcb *)inph; 192 if (inp->inp_af != AF_INET) 193 continue; 194 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 195 continue; 196 if (!in_nullhost(inp->inp_laddr) && 197 !in_hosteq(inp->inp_laddr, ip->ip_dst)) 198 continue; 199 if (!in_nullhost(inp->inp_faddr) && 200 !in_hosteq(inp->inp_faddr, ip->ip_src)) 201 continue; 202 if (last == NULL) 203 ; 204 #if defined(IPSEC) 205 /* check AH/ESP integrity. */ 206 else if (ipsec_used && ipsec_in_reject(m, last)) { 207 /* do not inject data to pcb */ 208 } 209 #endif /*IPSEC*/ 210 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 211 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 212 n); 213 opts = NULL; 214 } 215 last = inp; 216 } 217 #if defined(IPSEC) 218 /* check AH/ESP integrity. */ 219 if (ipsec_used && last != NULL && ipsec_in_reject(m, last)) { 220 m_freem(m); 221 IP_STATDEC(IP_STAT_DELIVERED); 222 /* do not inject data to pcb */ 223 } else 224 #endif /*IPSEC*/ 225 if (last != NULL) 226 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m); 227 else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) { 228 uint64_t *ips; 229 230 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 231 0, 0); 232 ips = IP_STAT_GETREF(); 233 ips[IP_STAT_NOPROTO]++; 234 ips[IP_STAT_DELIVERED]--; 235 IP_STAT_PUTREF(); 236 } else 237 m_freem(m); 238 return; 239 } 240 241 int 242 rip_pcbnotify(struct inpcbtable *table, 243 struct in_addr faddr, struct in_addr laddr, int proto, int errno, 244 void (*notify)(struct inpcb *, int)) 245 { 246 struct inpcb_hdr *inph, *ninph; 247 int nmatch; 248 249 nmatch = 0; 250 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 251 struct inpcb *inp = (struct inpcb *)inph; 252 if (inp->inp_af != AF_INET) 253 continue; 254 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 255 continue; 256 if (in_hosteq(inp->inp_faddr, faddr) && 257 in_hosteq(inp->inp_laddr, laddr)) { 258 (*notify)(inp, errno); 259 nmatch++; 260 } 261 } 262 263 return nmatch; 264 } 265 266 void * 267 rip_ctlinput(int cmd, const struct sockaddr *sa, void *v) 268 { 269 struct ip *ip = v; 270 void (*notify)(struct inpcb *, int) = in_rtchange; 271 int errno; 272 273 if (sa->sa_family != AF_INET || 274 sa->sa_len != sizeof(struct sockaddr_in)) 275 return NULL; 276 if ((unsigned)cmd >= PRC_NCMDS) 277 return NULL; 278 errno = inetctlerrmap[cmd]; 279 if (PRC_IS_REDIRECT(cmd)) 280 notify = in_rtchange, ip = 0; 281 else if (cmd == PRC_HOSTDEAD) 282 ip = 0; 283 else if (errno == 0) 284 return NULL; 285 if (ip) { 286 rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr, 287 ip->ip_src, ip->ip_p, errno, notify); 288 289 /* XXX mapped address case */ 290 } else 291 in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno, 292 notify); 293 return NULL; 294 } 295 296 /* 297 * Generate IP header and pass packet to ip_output. 298 * Tack on options user may have setup with control call. 299 */ 300 int 301 rip_output(struct mbuf *m, struct inpcb *inp, struct mbuf *control, 302 struct lwp *l) 303 { 304 struct ip *ip; 305 struct mbuf *opts; 306 struct ip_pktopts pktopts; 307 kauth_cred_t cred; 308 int error, flags; 309 310 flags = (inp->inp_socket->so_options & SO_DONTROUTE) | 311 IP_ALLOWBROADCAST | IP_RETURNMTU; 312 313 if (l == NULL) 314 cred = NULL; 315 else 316 cred = l->l_cred; 317 318 /* Setup IP outgoing packet options */ 319 memset(&pktopts, 0, sizeof(pktopts)); 320 error = ip_setpktopts(control, &pktopts, &flags, inp, cred); 321 if (control != NULL) 322 m_freem(control); 323 if (error != 0) 324 goto release; 325 326 /* 327 * If the user handed us a complete IP packet, use it. 328 * Otherwise, allocate an mbuf for a header and fill it in. 329 */ 330 if ((inp->inp_flags & INP_HDRINCL) == 0) { 331 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 332 error = EMSGSIZE; 333 goto release; 334 } 335 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 336 if (!m) { 337 error = ENOBUFS; 338 goto release; 339 } 340 ip = mtod(m, struct ip *); 341 ip->ip_tos = 0; 342 ip->ip_off = htons(0); 343 ip->ip_p = inp->inp_ip.ip_p; 344 ip->ip_len = htons(m->m_pkthdr.len); 345 ip->ip_src = pktopts.ippo_laddr.sin_addr; 346 ip->ip_dst = inp->inp_faddr; 347 ip->ip_ttl = MAXTTL; 348 opts = inp->inp_options; 349 } else { 350 if (m->m_pkthdr.len > IP_MAXPACKET) { 351 error = EMSGSIZE; 352 goto release; 353 } 354 ip = mtod(m, struct ip *); 355 356 /* 357 * If the mbuf is read-only, we need to allocate 358 * a new mbuf for the header, since we need to 359 * modify the header. 360 */ 361 if (M_READONLY(m)) { 362 int hlen = ip->ip_hl << 2; 363 364 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 365 if (m == NULL) { 366 error = ENOMEM; /* XXX */ 367 goto release; 368 } 369 ip = mtod(m, struct ip *); 370 } 371 372 /* XXX userland passes ip_len and ip_off in host order */ 373 if (m->m_pkthdr.len != ip->ip_len) { 374 error = EINVAL; 375 goto release; 376 } 377 HTONS(ip->ip_len); 378 HTONS(ip->ip_off); 379 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 380 flags |= IP_NOIPNEWID; 381 opts = NULL; 382 /* XXX prevent ip_output from overwriting header fields */ 383 flags |= IP_RAWOUTPUT; 384 IP_STATINC(IP_STAT_RAWOUT); 385 } 386 387 /* 388 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 389 * will be stored in inp_errormtu. 390 */ 391 return ip_output(m, opts, &inp->inp_route, flags, pktopts.ippo_imo, 392 inp); 393 394 release: 395 if (m != NULL) 396 m_freem(m); 397 return error; 398 } 399 400 /* 401 * Raw IP socket option processing. 402 */ 403 int 404 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 405 { 406 struct inpcb *inp = sotoinpcb(so); 407 int error = 0; 408 int optval; 409 410 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 411 if (op == PRCO_GETOPT) { 412 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 413 error = sockopt_set(sopt, &optval, sizeof(optval)); 414 } else if (op == PRCO_SETOPT) { 415 error = sockopt_getint(sopt, &optval); 416 if (error) 417 goto out; 418 if (optval) { 419 inp->inp_flags &= ~INP_HDRINCL; 420 inp->inp_flags |= INP_NOHEADER; 421 } else 422 inp->inp_flags &= ~INP_NOHEADER; 423 } 424 goto out; 425 } else if (sopt->sopt_level != IPPROTO_IP) 426 return ip_ctloutput(op, so, sopt); 427 428 switch (op) { 429 430 case PRCO_SETOPT: 431 switch (sopt->sopt_name) { 432 case IP_HDRINCL: 433 error = sockopt_getint(sopt, &optval); 434 if (error) 435 break; 436 if (optval) 437 inp->inp_flags |= INP_HDRINCL; 438 else 439 inp->inp_flags &= ~INP_HDRINCL; 440 break; 441 442 #ifdef MROUTING 443 case MRT_INIT: 444 case MRT_DONE: 445 case MRT_ADD_VIF: 446 case MRT_DEL_VIF: 447 case MRT_ADD_MFC: 448 case MRT_DEL_MFC: 449 case MRT_ASSERT: 450 case MRT_API_CONFIG: 451 case MRT_ADD_BW_UPCALL: 452 case MRT_DEL_BW_UPCALL: 453 error = ip_mrouter_set(so, sopt); 454 break; 455 #endif 456 457 default: 458 error = ip_ctloutput(op, so, sopt); 459 break; 460 } 461 break; 462 463 case PRCO_GETOPT: 464 switch (sopt->sopt_name) { 465 case IP_HDRINCL: 466 optval = inp->inp_flags & INP_HDRINCL; 467 error = sockopt_set(sopt, &optval, sizeof(optval)); 468 break; 469 470 #ifdef MROUTING 471 case MRT_VERSION: 472 case MRT_ASSERT: 473 case MRT_API_SUPPORT: 474 case MRT_API_CONFIG: 475 error = ip_mrouter_get(so, sopt); 476 break; 477 #endif 478 479 default: 480 error = ip_ctloutput(op, so, sopt); 481 break; 482 } 483 break; 484 } 485 out: 486 return error; 487 } 488 489 int 490 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 491 { 492 493 if (IFNET_READER_EMPTY()) 494 return (EADDRNOTAVAIL); 495 if (addr->sin_family != AF_INET) 496 return (EAFNOSUPPORT); 497 inp->inp_faddr = addr->sin_addr; 498 return (0); 499 } 500 501 static void 502 rip_disconnect1(struct inpcb *inp) 503 { 504 505 inp->inp_faddr = zeroin_addr; 506 } 507 508 static int 509 rip_attach(struct socket *so, int proto) 510 { 511 struct inpcb *inp; 512 int error; 513 514 KASSERT(sotoinpcb(so) == NULL); 515 sosetlock(so); 516 517 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 518 error = soreserve(so, rip_sendspace, rip_recvspace); 519 if (error) { 520 return error; 521 } 522 } 523 524 error = in_pcballoc(so, &rawcbtable); 525 if (error) { 526 return error; 527 } 528 inp = sotoinpcb(so); 529 inp->inp_ip.ip_p = proto; 530 KASSERT(solocked(so)); 531 532 return 0; 533 } 534 535 static void 536 rip_detach(struct socket *so) 537 { 538 struct inpcb *inp; 539 540 KASSERT(solocked(so)); 541 inp = sotoinpcb(so); 542 KASSERT(inp != NULL); 543 544 #ifdef MROUTING 545 extern struct socket *ip_mrouter; 546 if (so == ip_mrouter) { 547 ip_mrouter_done(); 548 } 549 #endif 550 in_pcbdetach(inp); 551 } 552 553 static int 554 rip_accept(struct socket *so, struct sockaddr *nam) 555 { 556 KASSERT(solocked(so)); 557 558 panic("rip_accept"); 559 560 return EOPNOTSUPP; 561 } 562 563 static int 564 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 565 { 566 struct inpcb *inp = sotoinpcb(so); 567 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 568 int error = 0; 569 int s, ss; 570 struct ifaddr *ifa; 571 572 KASSERT(solocked(so)); 573 KASSERT(inp != NULL); 574 KASSERT(nam != NULL); 575 576 if (addr->sin_len != sizeof(*addr)) 577 return EINVAL; 578 579 s = splsoftnet(); 580 if (IFNET_READER_EMPTY()) { 581 error = EADDRNOTAVAIL; 582 goto release; 583 } 584 if (addr->sin_family != AF_INET) { 585 error = EAFNOSUPPORT; 586 goto release; 587 } 588 ss = pserialize_read_enter(); 589 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 590 !in_nullhost(addr->sin_addr)) 591 { 592 pserialize_read_exit(ss); 593 error = EADDRNOTAVAIL; 594 goto release; 595 } 596 if (ifa && (ifatoia(ifa))->ia4_flags & IN6_IFF_DUPLICATED) { 597 pserialize_read_exit(ss); 598 error = EADDRNOTAVAIL; 599 goto release; 600 } 601 pserialize_read_exit(ss); 602 603 inp->inp_laddr = addr->sin_addr; 604 605 release: 606 splx(s); 607 return error; 608 } 609 610 static int 611 rip_listen(struct socket *so, struct lwp *l) 612 { 613 KASSERT(solocked(so)); 614 615 return EOPNOTSUPP; 616 } 617 618 static int 619 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 620 { 621 struct inpcb *inp = sotoinpcb(so); 622 int error = 0; 623 int s; 624 625 KASSERT(solocked(so)); 626 KASSERT(inp != NULL); 627 KASSERT(nam != NULL); 628 629 s = splsoftnet(); 630 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 631 if (! error) 632 soisconnected(so); 633 splx(s); 634 635 return error; 636 } 637 638 static int 639 rip_connect2(struct socket *so, struct socket *so2) 640 { 641 KASSERT(solocked(so)); 642 643 return EOPNOTSUPP; 644 } 645 646 static int 647 rip_disconnect(struct socket *so) 648 { 649 struct inpcb *inp = sotoinpcb(so); 650 int s; 651 652 KASSERT(solocked(so)); 653 KASSERT(inp != NULL); 654 655 s = splsoftnet(); 656 soisdisconnected(so); 657 rip_disconnect1(inp); 658 splx(s); 659 660 return 0; 661 } 662 663 static int 664 rip_shutdown(struct socket *so) 665 { 666 int s; 667 668 KASSERT(solocked(so)); 669 670 /* 671 * Mark the connection as being incapable of further input. 672 */ 673 s = splsoftnet(); 674 socantsendmore(so); 675 splx(s); 676 677 return 0; 678 } 679 680 static int 681 rip_abort(struct socket *so) 682 { 683 KASSERT(solocked(so)); 684 685 panic("rip_abort"); 686 687 return EOPNOTSUPP; 688 } 689 690 static int 691 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 692 { 693 return in_control(so, cmd, nam, ifp); 694 } 695 696 static int 697 rip_stat(struct socket *so, struct stat *ub) 698 { 699 KASSERT(solocked(so)); 700 701 /* stat: don't bother with a blocksize. */ 702 return 0; 703 } 704 705 static int 706 rip_peeraddr(struct socket *so, struct sockaddr *nam) 707 { 708 int s; 709 710 KASSERT(solocked(so)); 711 KASSERT(sotoinpcb(so) != NULL); 712 KASSERT(nam != NULL); 713 714 s = splsoftnet(); 715 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 716 splx(s); 717 718 return 0; 719 } 720 721 static int 722 rip_sockaddr(struct socket *so, struct sockaddr *nam) 723 { 724 int s; 725 726 KASSERT(solocked(so)); 727 KASSERT(sotoinpcb(so) != NULL); 728 KASSERT(nam != NULL); 729 730 s = splsoftnet(); 731 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 732 splx(s); 733 734 return 0; 735 } 736 737 static int 738 rip_rcvd(struct socket *so, int flags, struct lwp *l) 739 { 740 KASSERT(solocked(so)); 741 742 return EOPNOTSUPP; 743 } 744 745 static int 746 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 747 { 748 KASSERT(solocked(so)); 749 750 return EOPNOTSUPP; 751 } 752 753 static int 754 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 755 struct mbuf *control, struct lwp *l) 756 { 757 struct inpcb *inp = sotoinpcb(so); 758 int error = 0; 759 int s; 760 761 KASSERT(solocked(so)); 762 KASSERT(inp != NULL); 763 KASSERT(m != NULL); 764 765 /* 766 * Ship a packet out. The appropriate raw output 767 * routine handles any massaging necessary. 768 */ 769 s = splsoftnet(); 770 if (nam) { 771 if ((so->so_state & SS_ISCONNECTED) != 0) { 772 error = EISCONN; 773 goto die; 774 } 775 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 776 if (error) 777 goto die; 778 } else { 779 if ((so->so_state & SS_ISCONNECTED) == 0) { 780 error = ENOTCONN; 781 goto die; 782 } 783 } 784 error = rip_output(m, inp, control, l); 785 m = NULL; 786 control = NULL; 787 if (nam) 788 rip_disconnect1(inp); 789 die: 790 if (m != NULL) 791 m_freem(m); 792 if (control != NULL) 793 m_freem(control); 794 795 splx(s); 796 return error; 797 } 798 799 static int 800 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 801 { 802 KASSERT(solocked(so)); 803 804 m_freem(m); 805 m_freem(control); 806 807 return EOPNOTSUPP; 808 } 809 810 static int 811 rip_purgeif(struct socket *so, struct ifnet *ifp) 812 { 813 int s; 814 815 s = splsoftnet(); 816 mutex_enter(softnet_lock); 817 in_pcbpurgeif0(&rawcbtable, ifp); 818 #ifdef NET_MPSAFE 819 mutex_exit(softnet_lock); 820 #endif 821 in_purgeif(ifp); 822 #ifdef NET_MPSAFE 823 mutex_enter(softnet_lock); 824 #endif 825 in_pcbpurgeif(&rawcbtable, ifp); 826 mutex_exit(softnet_lock); 827 splx(s); 828 829 return 0; 830 } 831 832 PR_WRAP_USRREQS(rip) 833 #define rip_attach rip_attach_wrapper 834 #define rip_detach rip_detach_wrapper 835 #define rip_accept rip_accept_wrapper 836 #define rip_bind rip_bind_wrapper 837 #define rip_listen rip_listen_wrapper 838 #define rip_connect rip_connect_wrapper 839 #define rip_connect2 rip_connect2_wrapper 840 #define rip_disconnect rip_disconnect_wrapper 841 #define rip_shutdown rip_shutdown_wrapper 842 #define rip_abort rip_abort_wrapper 843 #define rip_ioctl rip_ioctl_wrapper 844 #define rip_stat rip_stat_wrapper 845 #define rip_peeraddr rip_peeraddr_wrapper 846 #define rip_sockaddr rip_sockaddr_wrapper 847 #define rip_rcvd rip_rcvd_wrapper 848 #define rip_recvoob rip_recvoob_wrapper 849 #define rip_send rip_send_wrapper 850 #define rip_sendoob rip_sendoob_wrapper 851 #define rip_purgeif rip_purgeif_wrapper 852 853 const struct pr_usrreqs rip_usrreqs = { 854 .pr_attach = rip_attach, 855 .pr_detach = rip_detach, 856 .pr_accept = rip_accept, 857 .pr_bind = rip_bind, 858 .pr_listen = rip_listen, 859 .pr_connect = rip_connect, 860 .pr_connect2 = rip_connect2, 861 .pr_disconnect = rip_disconnect, 862 .pr_shutdown = rip_shutdown, 863 .pr_abort = rip_abort, 864 .pr_ioctl = rip_ioctl, 865 .pr_stat = rip_stat, 866 .pr_peeraddr = rip_peeraddr, 867 .pr_sockaddr = rip_sockaddr, 868 .pr_rcvd = rip_rcvd, 869 .pr_recvoob = rip_recvoob, 870 .pr_send = rip_send, 871 .pr_sendoob = rip_sendoob, 872 .pr_purgeif = rip_purgeif, 873 }; 874 875 static void 876 sysctl_net_inet_raw_setup(struct sysctllog **clog) 877 { 878 879 sysctl_createv(clog, 0, NULL, NULL, 880 CTLFLAG_PERMANENT, 881 CTLTYPE_NODE, "inet", NULL, 882 NULL, 0, NULL, 0, 883 CTL_NET, PF_INET, CTL_EOL); 884 sysctl_createv(clog, 0, NULL, NULL, 885 CTLFLAG_PERMANENT, 886 CTLTYPE_NODE, "raw", 887 SYSCTL_DESCR("Raw IPv4 settings"), 888 NULL, 0, NULL, 0, 889 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 890 891 sysctl_createv(clog, 0, NULL, NULL, 892 CTLFLAG_PERMANENT, 893 CTLTYPE_STRUCT, "pcblist", 894 SYSCTL_DESCR("Raw IPv4 control block list"), 895 sysctl_inpcblist, 0, &rawcbtable, 0, 896 CTL_NET, PF_INET, IPPROTO_RAW, 897 CTL_CREATE, CTL_EOL); 898 } 899
Indexes created Mon Sep 29 21:09:56 GMT 2025