raw_ip.c revision 1.171.2.2
1 /* $NetBSD: raw_ip.c,v 1.171.2.2 2018/04/16 02:00:08 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 1.171.2.2 2018/04/16 02:00:08 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 *n) 142 { 143 struct mbuf *opts = NULL; 144 145 if (last->inp_flags & INP_NOHEADER) 146 m_adj(n, hlen); 147 if (last->inp_flags & INP_CONTROLOPTS || 148 SOOPT_TIMESTAMP(last->inp_socket->so_options)) 149 ip_savecontrol(last, &opts, ip, n); 150 if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) { 151 soroverflow(last->inp_socket); 152 m_freem(n); 153 if (opts) 154 m_freem(opts); 155 } else { 156 sorwakeup(last->inp_socket); 157 } 158 } 159 160 /* 161 * Setup generic address and protocol structures 162 * for raw_input routine, then pass them along with 163 * mbuf chain. 164 */ 165 void 166 rip_input(struct mbuf *m, ...) 167 { 168 int hlen, proto; 169 struct ip *ip = mtod(m, struct ip *); 170 struct inpcb_hdr *inph; 171 struct inpcb *inp; 172 struct inpcb *last = NULL; 173 struct mbuf *n; 174 struct sockaddr_in ripsrc; 175 va_list ap; 176 177 va_start(ap, m); 178 (void)va_arg(ap, int); /* ignore value, advance ap */ 179 proto = va_arg(ap, int); 180 va_end(ap); 181 182 sockaddr_in_init(&ripsrc, &ip->ip_src, 0); 183 184 /* 185 * XXX Compatibility: programs using raw IP expect ip_len 186 * XXX to have the header length subtracted, and in host order. 187 * XXX ip_off is also expected to be host order. 188 */ 189 hlen = ip->ip_hl << 2; 190 ip->ip_len = ntohs(ip->ip_len) - hlen; 191 NTOHS(ip->ip_off); 192 193 TAILQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) { 194 inp = (struct inpcb *)inph; 195 if (inp->inp_af != AF_INET) 196 continue; 197 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 198 continue; 199 if (!in_nullhost(inp->inp_laddr) && 200 !in_hosteq(inp->inp_laddr, ip->ip_dst)) 201 continue; 202 if (!in_nullhost(inp->inp_faddr) && 203 !in_hosteq(inp->inp_faddr, ip->ip_src)) 204 continue; 205 206 if (last == NULL) { 207 ; 208 } 209 #if defined(IPSEC) 210 else if (ipsec_used && ipsec_in_reject(m, last)) { 211 /* do not inject data into pcb */ 212 } 213 #endif 214 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 215 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, n); 216 } 217 218 last = inp; 219 } 220 221 #if defined(IPSEC) 222 if (ipsec_used && last != NULL && ipsec_in_reject(m, last)) { 223 m_freem(m); 224 IP_STATDEC(IP_STAT_DELIVERED); 225 /* do not inject data into pcb */ 226 } else 227 #endif 228 if (last != NULL) { 229 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, m); 230 } else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) { 231 uint64_t *ips; 232 233 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 234 0, 0); 235 ips = IP_STAT_GETREF(); 236 ips[IP_STAT_NOPROTO]++; 237 ips[IP_STAT_DELIVERED]--; 238 IP_STAT_PUTREF(); 239 } else { 240 m_freem(m); 241 } 242 243 return; 244 } 245 246 int 247 rip_pcbnotify(struct inpcbtable *table, 248 struct in_addr faddr, struct in_addr laddr, int proto, int errno, 249 void (*notify)(struct inpcb *, int)) 250 { 251 struct inpcb_hdr *inph, *ninph; 252 int nmatch; 253 254 nmatch = 0; 255 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 256 struct inpcb *inp = (struct inpcb *)inph; 257 if (inp->inp_af != AF_INET) 258 continue; 259 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 260 continue; 261 if (in_hosteq(inp->inp_faddr, faddr) && 262 in_hosteq(inp->inp_laddr, laddr)) { 263 (*notify)(inp, errno); 264 nmatch++; 265 } 266 } 267 268 return nmatch; 269 } 270 271 void * 272 rip_ctlinput(int cmd, const struct sockaddr *sa, void *v) 273 { 274 struct ip *ip = v; 275 void (*notify)(struct inpcb *, int) = in_rtchange; 276 int errno; 277 278 if (sa->sa_family != AF_INET || 279 sa->sa_len != sizeof(struct sockaddr_in)) 280 return NULL; 281 if ((unsigned)cmd >= PRC_NCMDS) 282 return NULL; 283 errno = inetctlerrmap[cmd]; 284 if (PRC_IS_REDIRECT(cmd)) 285 notify = in_rtchange, ip = 0; 286 else if (cmd == PRC_HOSTDEAD) 287 ip = 0; 288 else if (errno == 0) 289 return NULL; 290 if (ip) { 291 rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr, 292 ip->ip_src, ip->ip_p, errno, notify); 293 294 /* XXX mapped address case */ 295 } else 296 in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno, 297 notify); 298 return NULL; 299 } 300 301 /* 302 * Generate IP header and pass packet to ip_output. 303 * Tack on options user may have setup with control call. 304 */ 305 int 306 rip_output(struct mbuf *m, struct inpcb *inp, struct mbuf *control, 307 struct lwp *l) 308 { 309 struct ip *ip; 310 struct mbuf *opts; 311 struct ip_pktopts pktopts; 312 kauth_cred_t cred; 313 int error, flags; 314 315 flags = (inp->inp_socket->so_options & SO_DONTROUTE) | 316 IP_ALLOWBROADCAST | IP_RETURNMTU; 317 318 if (l == NULL) 319 cred = NULL; 320 else 321 cred = l->l_cred; 322 323 /* Setup IP outgoing packet options */ 324 memset(&pktopts, 0, sizeof(pktopts)); 325 error = ip_setpktopts(control, &pktopts, &flags, inp, cred); 326 if (control != NULL) 327 m_freem(control); 328 if (error != 0) 329 goto release; 330 331 /* 332 * If the user handed us a complete IP packet, use it. 333 * Otherwise, allocate an mbuf for a header and fill it in. 334 */ 335 if ((inp->inp_flags & INP_HDRINCL) == 0) { 336 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 337 error = EMSGSIZE; 338 goto release; 339 } 340 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 341 if (!m) { 342 error = ENOBUFS; 343 goto release; 344 } 345 ip = mtod(m, struct ip *); 346 ip->ip_tos = 0; 347 ip->ip_off = htons(0); 348 ip->ip_p = inp->inp_ip.ip_p; 349 ip->ip_len = htons(m->m_pkthdr.len); 350 ip->ip_src = pktopts.ippo_laddr.sin_addr; 351 ip->ip_dst = inp->inp_faddr; 352 ip->ip_ttl = MAXTTL; 353 opts = inp->inp_options; 354 } else { 355 if (m->m_pkthdr.len > IP_MAXPACKET) { 356 error = EMSGSIZE; 357 goto release; 358 } 359 ip = mtod(m, struct ip *); 360 361 /* 362 * If the mbuf is read-only, we need to allocate 363 * a new mbuf for the header, since we need to 364 * modify the header. 365 */ 366 if (M_READONLY(m)) { 367 int hlen = ip->ip_hl << 2; 368 369 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 370 if (m == NULL) { 371 error = ENOMEM; /* XXX */ 372 goto release; 373 } 374 ip = mtod(m, struct ip *); 375 } 376 377 /* XXX userland passes ip_len and ip_off in host order */ 378 if (m->m_pkthdr.len != ip->ip_len) { 379 error = EINVAL; 380 goto release; 381 } 382 HTONS(ip->ip_len); 383 HTONS(ip->ip_off); 384 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 385 flags |= IP_NOIPNEWID; 386 opts = NULL; 387 /* XXX prevent ip_output from overwriting header fields */ 388 flags |= IP_RAWOUTPUT; 389 IP_STATINC(IP_STAT_RAWOUT); 390 } 391 392 /* 393 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 394 * will be stored in inp_errormtu. 395 */ 396 return ip_output(m, opts, &inp->inp_route, flags, pktopts.ippo_imo, 397 inp); 398 399 release: 400 if (m != NULL) 401 m_freem(m); 402 return error; 403 } 404 405 /* 406 * Raw IP socket option processing. 407 */ 408 int 409 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 410 { 411 struct inpcb *inp = sotoinpcb(so); 412 int error = 0; 413 int optval; 414 415 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 416 if (op == PRCO_GETOPT) { 417 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 418 error = sockopt_set(sopt, &optval, sizeof(optval)); 419 } else if (op == PRCO_SETOPT) { 420 error = sockopt_getint(sopt, &optval); 421 if (error) 422 goto out; 423 if (optval) { 424 inp->inp_flags &= ~INP_HDRINCL; 425 inp->inp_flags |= INP_NOHEADER; 426 } else 427 inp->inp_flags &= ~INP_NOHEADER; 428 } 429 goto out; 430 } else if (sopt->sopt_level != IPPROTO_IP) 431 return ip_ctloutput(op, so, sopt); 432 433 switch (op) { 434 435 case PRCO_SETOPT: 436 switch (sopt->sopt_name) { 437 case IP_HDRINCL: 438 error = sockopt_getint(sopt, &optval); 439 if (error) 440 break; 441 if (optval) 442 inp->inp_flags |= INP_HDRINCL; 443 else 444 inp->inp_flags &= ~INP_HDRINCL; 445 break; 446 447 #ifdef MROUTING 448 case MRT_INIT: 449 case MRT_DONE: 450 case MRT_ADD_VIF: 451 case MRT_DEL_VIF: 452 case MRT_ADD_MFC: 453 case MRT_DEL_MFC: 454 case MRT_ASSERT: 455 case MRT_API_CONFIG: 456 case MRT_ADD_BW_UPCALL: 457 case MRT_DEL_BW_UPCALL: 458 error = ip_mrouter_set(so, sopt); 459 break; 460 #endif 461 462 default: 463 error = ip_ctloutput(op, so, sopt); 464 break; 465 } 466 break; 467 468 case PRCO_GETOPT: 469 switch (sopt->sopt_name) { 470 case IP_HDRINCL: 471 optval = inp->inp_flags & INP_HDRINCL; 472 error = sockopt_set(sopt, &optval, sizeof(optval)); 473 break; 474 475 #ifdef MROUTING 476 case MRT_VERSION: 477 case MRT_ASSERT: 478 case MRT_API_SUPPORT: 479 case MRT_API_CONFIG: 480 error = ip_mrouter_get(so, sopt); 481 break; 482 #endif 483 484 default: 485 error = ip_ctloutput(op, so, sopt); 486 break; 487 } 488 break; 489 } 490 out: 491 return error; 492 } 493 494 int 495 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 496 { 497 498 if (IFNET_READER_EMPTY()) 499 return (EADDRNOTAVAIL); 500 if (addr->sin_family != AF_INET) 501 return (EAFNOSUPPORT); 502 inp->inp_faddr = addr->sin_addr; 503 return (0); 504 } 505 506 static void 507 rip_disconnect1(struct inpcb *inp) 508 { 509 510 inp->inp_faddr = zeroin_addr; 511 } 512 513 static int 514 rip_attach(struct socket *so, int proto) 515 { 516 struct inpcb *inp; 517 int error; 518 519 KASSERT(sotoinpcb(so) == NULL); 520 sosetlock(so); 521 522 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 523 error = soreserve(so, rip_sendspace, rip_recvspace); 524 if (error) { 525 return error; 526 } 527 } 528 529 error = in_pcballoc(so, &rawcbtable); 530 if (error) { 531 return error; 532 } 533 inp = sotoinpcb(so); 534 inp->inp_ip.ip_p = proto; 535 KASSERT(solocked(so)); 536 537 return 0; 538 } 539 540 static void 541 rip_detach(struct socket *so) 542 { 543 struct inpcb *inp; 544 545 KASSERT(solocked(so)); 546 inp = sotoinpcb(so); 547 KASSERT(inp != NULL); 548 549 #ifdef MROUTING 550 extern struct socket *ip_mrouter; 551 if (so == ip_mrouter) { 552 ip_mrouter_done(); 553 } 554 #endif 555 in_pcbdetach(inp); 556 } 557 558 static int 559 rip_accept(struct socket *so, struct sockaddr *nam) 560 { 561 KASSERT(solocked(so)); 562 563 panic("rip_accept"); 564 565 return EOPNOTSUPP; 566 } 567 568 static int 569 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 570 { 571 struct inpcb *inp = sotoinpcb(so); 572 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 573 int error = 0; 574 int s, ss; 575 struct ifaddr *ifa; 576 577 KASSERT(solocked(so)); 578 KASSERT(inp != NULL); 579 KASSERT(nam != NULL); 580 581 if (addr->sin_len != sizeof(*addr)) 582 return EINVAL; 583 584 s = splsoftnet(); 585 if (IFNET_READER_EMPTY()) { 586 error = EADDRNOTAVAIL; 587 goto release; 588 } 589 if (addr->sin_family != AF_INET) { 590 error = EAFNOSUPPORT; 591 goto release; 592 } 593 ss = pserialize_read_enter(); 594 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 595 !in_nullhost(addr->sin_addr)) 596 { 597 pserialize_read_exit(ss); 598 error = EADDRNOTAVAIL; 599 goto release; 600 } 601 if (ifa && (ifatoia(ifa))->ia4_flags & IN6_IFF_DUPLICATED) { 602 pserialize_read_exit(ss); 603 error = EADDRNOTAVAIL; 604 goto release; 605 } 606 pserialize_read_exit(ss); 607 608 inp->inp_laddr = addr->sin_addr; 609 610 release: 611 splx(s); 612 return error; 613 } 614 615 static int 616 rip_listen(struct socket *so, struct lwp *l) 617 { 618 KASSERT(solocked(so)); 619 620 return EOPNOTSUPP; 621 } 622 623 static int 624 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 625 { 626 struct inpcb *inp = sotoinpcb(so); 627 int error = 0; 628 int s; 629 630 KASSERT(solocked(so)); 631 KASSERT(inp != NULL); 632 KASSERT(nam != NULL); 633 634 s = splsoftnet(); 635 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 636 if (! error) 637 soisconnected(so); 638 splx(s); 639 640 return error; 641 } 642 643 static int 644 rip_connect2(struct socket *so, struct socket *so2) 645 { 646 KASSERT(solocked(so)); 647 648 return EOPNOTSUPP; 649 } 650 651 static int 652 rip_disconnect(struct socket *so) 653 { 654 struct inpcb *inp = sotoinpcb(so); 655 int s; 656 657 KASSERT(solocked(so)); 658 KASSERT(inp != NULL); 659 660 s = splsoftnet(); 661 soisdisconnected(so); 662 rip_disconnect1(inp); 663 splx(s); 664 665 return 0; 666 } 667 668 static int 669 rip_shutdown(struct socket *so) 670 { 671 int s; 672 673 KASSERT(solocked(so)); 674 675 /* 676 * Mark the connection as being incapable of further input. 677 */ 678 s = splsoftnet(); 679 socantsendmore(so); 680 splx(s); 681 682 return 0; 683 } 684 685 static int 686 rip_abort(struct socket *so) 687 { 688 KASSERT(solocked(so)); 689 690 panic("rip_abort"); 691 692 return EOPNOTSUPP; 693 } 694 695 static int 696 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 697 { 698 return in_control(so, cmd, nam, ifp); 699 } 700 701 static int 702 rip_stat(struct socket *so, struct stat *ub) 703 { 704 KASSERT(solocked(so)); 705 706 /* stat: don't bother with a blocksize. */ 707 return 0; 708 } 709 710 static int 711 rip_peeraddr(struct socket *so, struct sockaddr *nam) 712 { 713 int s; 714 715 KASSERT(solocked(so)); 716 KASSERT(sotoinpcb(so) != NULL); 717 KASSERT(nam != NULL); 718 719 s = splsoftnet(); 720 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 721 splx(s); 722 723 return 0; 724 } 725 726 static int 727 rip_sockaddr(struct socket *so, struct sockaddr *nam) 728 { 729 int s; 730 731 KASSERT(solocked(so)); 732 KASSERT(sotoinpcb(so) != NULL); 733 KASSERT(nam != NULL); 734 735 s = splsoftnet(); 736 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 737 splx(s); 738 739 return 0; 740 } 741 742 static int 743 rip_rcvd(struct socket *so, int flags, struct lwp *l) 744 { 745 KASSERT(solocked(so)); 746 747 return EOPNOTSUPP; 748 } 749 750 static int 751 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 752 { 753 KASSERT(solocked(so)); 754 755 return EOPNOTSUPP; 756 } 757 758 static int 759 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 760 struct mbuf *control, struct lwp *l) 761 { 762 struct inpcb *inp = sotoinpcb(so); 763 int error = 0; 764 int s; 765 766 KASSERT(solocked(so)); 767 KASSERT(inp != NULL); 768 KASSERT(m != NULL); 769 770 /* 771 * Ship a packet out. The appropriate raw output 772 * routine handles any massaging necessary. 773 */ 774 s = splsoftnet(); 775 if (nam) { 776 if ((so->so_state & SS_ISCONNECTED) != 0) { 777 error = EISCONN; 778 goto die; 779 } 780 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 781 if (error) 782 goto die; 783 } else { 784 if ((so->so_state & SS_ISCONNECTED) == 0) { 785 error = ENOTCONN; 786 goto die; 787 } 788 } 789 error = rip_output(m, inp, control, l); 790 m = NULL; 791 control = NULL; 792 if (nam) 793 rip_disconnect1(inp); 794 die: 795 if (m != NULL) 796 m_freem(m); 797 if (control != NULL) 798 m_freem(control); 799 800 splx(s); 801 return error; 802 } 803 804 static int 805 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 806 { 807 KASSERT(solocked(so)); 808 809 m_freem(m); 810 m_freem(control); 811 812 return EOPNOTSUPP; 813 } 814 815 static int 816 rip_purgeif(struct socket *so, struct ifnet *ifp) 817 { 818 int s; 819 820 s = splsoftnet(); 821 mutex_enter(softnet_lock); 822 in_pcbpurgeif0(&rawcbtable, ifp); 823 #ifdef NET_MPSAFE 824 mutex_exit(softnet_lock); 825 #endif 826 in_purgeif(ifp); 827 #ifdef NET_MPSAFE 828 mutex_enter(softnet_lock); 829 #endif 830 in_pcbpurgeif(&rawcbtable, ifp); 831 mutex_exit(softnet_lock); 832 splx(s); 833 834 return 0; 835 } 836 837 PR_WRAP_USRREQS(rip) 838 #define rip_attach rip_attach_wrapper 839 #define rip_detach rip_detach_wrapper 840 #define rip_accept rip_accept_wrapper 841 #define rip_bind rip_bind_wrapper 842 #define rip_listen rip_listen_wrapper 843 #define rip_connect rip_connect_wrapper 844 #define rip_connect2 rip_connect2_wrapper 845 #define rip_disconnect rip_disconnect_wrapper 846 #define rip_shutdown rip_shutdown_wrapper 847 #define rip_abort rip_abort_wrapper 848 #define rip_ioctl rip_ioctl_wrapper 849 #define rip_stat rip_stat_wrapper 850 #define rip_peeraddr rip_peeraddr_wrapper 851 #define rip_sockaddr rip_sockaddr_wrapper 852 #define rip_rcvd rip_rcvd_wrapper 853 #define rip_recvoob rip_recvoob_wrapper 854 #define rip_send rip_send_wrapper 855 #define rip_sendoob rip_sendoob_wrapper 856 #define rip_purgeif rip_purgeif_wrapper 857 858 const struct pr_usrreqs rip_usrreqs = { 859 .pr_attach = rip_attach, 860 .pr_detach = rip_detach, 861 .pr_accept = rip_accept, 862 .pr_bind = rip_bind, 863 .pr_listen = rip_listen, 864 .pr_connect = rip_connect, 865 .pr_connect2 = rip_connect2, 866 .pr_disconnect = rip_disconnect, 867 .pr_shutdown = rip_shutdown, 868 .pr_abort = rip_abort, 869 .pr_ioctl = rip_ioctl, 870 .pr_stat = rip_stat, 871 .pr_peeraddr = rip_peeraddr, 872 .pr_sockaddr = rip_sockaddr, 873 .pr_rcvd = rip_rcvd, 874 .pr_recvoob = rip_recvoob, 875 .pr_send = rip_send, 876 .pr_sendoob = rip_sendoob, 877 .pr_purgeif = rip_purgeif, 878 }; 879 880 static void 881 sysctl_net_inet_raw_setup(struct sysctllog **clog) 882 { 883 884 sysctl_createv(clog, 0, NULL, NULL, 885 CTLFLAG_PERMANENT, 886 CTLTYPE_NODE, "inet", NULL, 887 NULL, 0, NULL, 0, 888 CTL_NET, PF_INET, CTL_EOL); 889 sysctl_createv(clog, 0, NULL, NULL, 890 CTLFLAG_PERMANENT, 891 CTLTYPE_NODE, "raw", 892 SYSCTL_DESCR("Raw IPv4 settings"), 893 NULL, 0, NULL, 0, 894 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 895 896 sysctl_createv(clog, 0, NULL, NULL, 897 CTLFLAG_PERMANENT, 898 CTLTYPE_STRUCT, "pcblist", 899 SYSCTL_DESCR("Raw IPv4 control block list"), 900 sysctl_inpcblist, 0, &rawcbtable, 0, 901 CTL_NET, PF_INET, IPPROTO_RAW, 902 CTL_CREATE, CTL_EOL); 903 } 904
Indexes created Mon Sep 29 21:09:56 GMT 2025