raw_ip.c revision 1.174
1 /* $NetBSD: raw_ip.c,v 1.174 2018/04/12 07:28:10 maxv 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 1.174 2018/04/12 07:28:10 maxv 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; 202 203 if (last == NULL) { 204 ; 205 } 206 #if defined(IPSEC) 207 else if (ipsec_used && ipsec_in_reject(m, last)) { 208 /* do not inject data into pcb */ 209 } 210 #endif 211 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 212 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 213 n); 214 opts = NULL; 215 } 216 217 last = inp; 218 } 219 220 #if defined(IPSEC) 221 if (ipsec_used && last != NULL && ipsec_in_reject(m, last)) { 222 m_freem(m); 223 IP_STATDEC(IP_STAT_DELIVERED); 224 /* do not inject data into pcb */ 225 } else 226 #endif 227 if (last != NULL) { 228 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m); 229 } else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) { 230 uint64_t *ips; 231 232 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 233 0, 0); 234 ips = IP_STAT_GETREF(); 235 ips[IP_STAT_NOPROTO]++; 236 ips[IP_STAT_DELIVERED]--; 237 IP_STAT_PUTREF(); 238 } else { 239 m_freem(m); 240 } 241 242 return; 243 } 244 245 int 246 rip_pcbnotify(struct inpcbtable *table, 247 struct in_addr faddr, struct in_addr laddr, int proto, int errno, 248 void (*notify)(struct inpcb *, int)) 249 { 250 struct inpcb_hdr *inph, *ninph; 251 int nmatch; 252 253 nmatch = 0; 254 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 255 struct inpcb *inp = (struct inpcb *)inph; 256 if (inp->inp_af != AF_INET) 257 continue; 258 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 259 continue; 260 if (in_hosteq(inp->inp_faddr, faddr) && 261 in_hosteq(inp->inp_laddr, laddr)) { 262 (*notify)(inp, errno); 263 nmatch++; 264 } 265 } 266 267 return nmatch; 268 } 269 270 void * 271 rip_ctlinput(int cmd, const struct sockaddr *sa, void *v) 272 { 273 struct ip *ip = v; 274 void (*notify)(struct inpcb *, int) = in_rtchange; 275 int errno; 276 277 if (sa->sa_family != AF_INET || 278 sa->sa_len != sizeof(struct sockaddr_in)) 279 return NULL; 280 if ((unsigned)cmd >= PRC_NCMDS) 281 return NULL; 282 errno = inetctlerrmap[cmd]; 283 if (PRC_IS_REDIRECT(cmd)) 284 notify = in_rtchange, ip = 0; 285 else if (cmd == PRC_HOSTDEAD) 286 ip = 0; 287 else if (errno == 0) 288 return NULL; 289 if (ip) { 290 rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr, 291 ip->ip_src, ip->ip_p, errno, notify); 292 293 /* XXX mapped address case */ 294 } else 295 in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno, 296 notify); 297 return NULL; 298 } 299 300 /* 301 * Generate IP header and pass packet to ip_output. 302 * Tack on options user may have setup with control call. 303 */ 304 int 305 rip_output(struct mbuf *m, struct inpcb *inp, struct mbuf *control, 306 struct lwp *l) 307 { 308 struct ip *ip; 309 struct mbuf *opts; 310 struct ip_pktopts pktopts; 311 kauth_cred_t cred; 312 int error, flags; 313 314 flags = (inp->inp_socket->so_options & SO_DONTROUTE) | 315 IP_ALLOWBROADCAST | IP_RETURNMTU; 316 317 if (l == NULL) 318 cred = NULL; 319 else 320 cred = l->l_cred; 321 322 /* Setup IP outgoing packet options */ 323 memset(&pktopts, 0, sizeof(pktopts)); 324 error = ip_setpktopts(control, &pktopts, &flags, inp, cred); 325 if (control != NULL) 326 m_freem(control); 327 if (error != 0) 328 goto release; 329 330 /* 331 * If the user handed us a complete IP packet, use it. 332 * Otherwise, allocate an mbuf for a header and fill it in. 333 */ 334 if ((inp->inp_flags & INP_HDRINCL) == 0) { 335 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 336 error = EMSGSIZE; 337 goto release; 338 } 339 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 340 if (!m) { 341 error = ENOBUFS; 342 goto release; 343 } 344 ip = mtod(m, struct ip *); 345 ip->ip_tos = 0; 346 ip->ip_off = htons(0); 347 ip->ip_p = inp->inp_ip.ip_p; 348 ip->ip_len = htons(m->m_pkthdr.len); 349 ip->ip_src = pktopts.ippo_laddr.sin_addr; 350 ip->ip_dst = inp->inp_faddr; 351 ip->ip_ttl = MAXTTL; 352 opts = inp->inp_options; 353 } else { 354 if (m->m_pkthdr.len > IP_MAXPACKET) { 355 error = EMSGSIZE; 356 goto release; 357 } 358 ip = mtod(m, struct ip *); 359 360 /* 361 * If the mbuf is read-only, we need to allocate 362 * a new mbuf for the header, since we need to 363 * modify the header. 364 */ 365 if (M_READONLY(m)) { 366 int hlen = ip->ip_hl << 2; 367 368 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 369 if (m == NULL) { 370 error = ENOMEM; /* XXX */ 371 goto release; 372 } 373 ip = mtod(m, struct ip *); 374 } 375 376 /* XXX userland passes ip_len and ip_off in host order */ 377 if (m->m_pkthdr.len != ip->ip_len) { 378 error = EINVAL; 379 goto release; 380 } 381 HTONS(ip->ip_len); 382 HTONS(ip->ip_off); 383 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 384 flags |= IP_NOIPNEWID; 385 opts = NULL; 386 /* XXX prevent ip_output from overwriting header fields */ 387 flags |= IP_RAWOUTPUT; 388 IP_STATINC(IP_STAT_RAWOUT); 389 } 390 391 /* 392 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 393 * will be stored in inp_errormtu. 394 */ 395 return ip_output(m, opts, &inp->inp_route, flags, pktopts.ippo_imo, 396 inp); 397 398 release: 399 if (m != NULL) 400 m_freem(m); 401 return error; 402 } 403 404 /* 405 * Raw IP socket option processing. 406 */ 407 int 408 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 409 { 410 struct inpcb *inp = sotoinpcb(so); 411 int error = 0; 412 int optval; 413 414 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 415 if (op == PRCO_GETOPT) { 416 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 417 error = sockopt_set(sopt, &optval, sizeof(optval)); 418 } else if (op == PRCO_SETOPT) { 419 error = sockopt_getint(sopt, &optval); 420 if (error) 421 goto out; 422 if (optval) { 423 inp->inp_flags &= ~INP_HDRINCL; 424 inp->inp_flags |= INP_NOHEADER; 425 } else 426 inp->inp_flags &= ~INP_NOHEADER; 427 } 428 goto out; 429 } else if (sopt->sopt_level != IPPROTO_IP) 430 return ip_ctloutput(op, so, sopt); 431 432 switch (op) { 433 434 case PRCO_SETOPT: 435 switch (sopt->sopt_name) { 436 case IP_HDRINCL: 437 error = sockopt_getint(sopt, &optval); 438 if (error) 439 break; 440 if (optval) 441 inp->inp_flags |= INP_HDRINCL; 442 else 443 inp->inp_flags &= ~INP_HDRINCL; 444 break; 445 446 #ifdef MROUTING 447 case MRT_INIT: 448 case MRT_DONE: 449 case MRT_ADD_VIF: 450 case MRT_DEL_VIF: 451 case MRT_ADD_MFC: 452 case MRT_DEL_MFC: 453 case MRT_ASSERT: 454 case MRT_API_CONFIG: 455 case MRT_ADD_BW_UPCALL: 456 case MRT_DEL_BW_UPCALL: 457 error = ip_mrouter_set(so, sopt); 458 break; 459 #endif 460 461 default: 462 error = ip_ctloutput(op, so, sopt); 463 break; 464 } 465 break; 466 467 case PRCO_GETOPT: 468 switch (sopt->sopt_name) { 469 case IP_HDRINCL: 470 optval = inp->inp_flags & INP_HDRINCL; 471 error = sockopt_set(sopt, &optval, sizeof(optval)); 472 break; 473 474 #ifdef MROUTING 475 case MRT_VERSION: 476 case MRT_ASSERT: 477 case MRT_API_SUPPORT: 478 case MRT_API_CONFIG: 479 error = ip_mrouter_get(so, sopt); 480 break; 481 #endif 482 483 default: 484 error = ip_ctloutput(op, so, sopt); 485 break; 486 } 487 break; 488 } 489 out: 490 return error; 491 } 492 493 int 494 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 495 { 496 497 if (IFNET_READER_EMPTY()) 498 return (EADDRNOTAVAIL); 499 if (addr->sin_family != AF_INET) 500 return (EAFNOSUPPORT); 501 inp->inp_faddr = addr->sin_addr; 502 return (0); 503 } 504 505 static void 506 rip_disconnect1(struct inpcb *inp) 507 { 508 509 inp->inp_faddr = zeroin_addr; 510 } 511 512 static int 513 rip_attach(struct socket *so, int proto) 514 { 515 struct inpcb *inp; 516 int error; 517 518 KASSERT(sotoinpcb(so) == NULL); 519 sosetlock(so); 520 521 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 522 error = soreserve(so, rip_sendspace, rip_recvspace); 523 if (error) { 524 return error; 525 } 526 } 527 528 error = in_pcballoc(so, &rawcbtable); 529 if (error) { 530 return error; 531 } 532 inp = sotoinpcb(so); 533 inp->inp_ip.ip_p = proto; 534 KASSERT(solocked(so)); 535 536 return 0; 537 } 538 539 static void 540 rip_detach(struct socket *so) 541 { 542 struct inpcb *inp; 543 544 KASSERT(solocked(so)); 545 inp = sotoinpcb(so); 546 KASSERT(inp != NULL); 547 548 #ifdef MROUTING 549 extern struct socket *ip_mrouter; 550 if (so == ip_mrouter) { 551 ip_mrouter_done(); 552 } 553 #endif 554 in_pcbdetach(inp); 555 } 556 557 static int 558 rip_accept(struct socket *so, struct sockaddr *nam) 559 { 560 KASSERT(solocked(so)); 561 562 panic("rip_accept"); 563 564 return EOPNOTSUPP; 565 } 566 567 static int 568 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 569 { 570 struct inpcb *inp = sotoinpcb(so); 571 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 572 int error = 0; 573 int s, ss; 574 struct ifaddr *ifa; 575 576 KASSERT(solocked(so)); 577 KASSERT(inp != NULL); 578 KASSERT(nam != NULL); 579 580 if (addr->sin_len != sizeof(*addr)) 581 return EINVAL; 582 583 s = splsoftnet(); 584 if (IFNET_READER_EMPTY()) { 585 error = EADDRNOTAVAIL; 586 goto release; 587 } 588 if (addr->sin_family != AF_INET) { 589 error = EAFNOSUPPORT; 590 goto release; 591 } 592 ss = pserialize_read_enter(); 593 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 594 !in_nullhost(addr->sin_addr)) 595 { 596 pserialize_read_exit(ss); 597 error = EADDRNOTAVAIL; 598 goto release; 599 } 600 if (ifa && (ifatoia(ifa))->ia4_flags & IN6_IFF_DUPLICATED) { 601 pserialize_read_exit(ss); 602 error = EADDRNOTAVAIL; 603 goto release; 604 } 605 pserialize_read_exit(ss); 606 607 inp->inp_laddr = addr->sin_addr; 608 609 release: 610 splx(s); 611 return error; 612 } 613 614 static int 615 rip_listen(struct socket *so, struct lwp *l) 616 { 617 KASSERT(solocked(so)); 618 619 return EOPNOTSUPP; 620 } 621 622 static int 623 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 624 { 625 struct inpcb *inp = sotoinpcb(so); 626 int error = 0; 627 int s; 628 629 KASSERT(solocked(so)); 630 KASSERT(inp != NULL); 631 KASSERT(nam != NULL); 632 633 s = splsoftnet(); 634 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 635 if (! error) 636 soisconnected(so); 637 splx(s); 638 639 return error; 640 } 641 642 static int 643 rip_connect2(struct socket *so, struct socket *so2) 644 { 645 KASSERT(solocked(so)); 646 647 return EOPNOTSUPP; 648 } 649 650 static int 651 rip_disconnect(struct socket *so) 652 { 653 struct inpcb *inp = sotoinpcb(so); 654 int s; 655 656 KASSERT(solocked(so)); 657 KASSERT(inp != NULL); 658 659 s = splsoftnet(); 660 soisdisconnected(so); 661 rip_disconnect1(inp); 662 splx(s); 663 664 return 0; 665 } 666 667 static int 668 rip_shutdown(struct socket *so) 669 { 670 int s; 671 672 KASSERT(solocked(so)); 673 674 /* 675 * Mark the connection as being incapable of further input. 676 */ 677 s = splsoftnet(); 678 socantsendmore(so); 679 splx(s); 680 681 return 0; 682 } 683 684 static int 685 rip_abort(struct socket *so) 686 { 687 KASSERT(solocked(so)); 688 689 panic("rip_abort"); 690 691 return EOPNOTSUPP; 692 } 693 694 static int 695 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 696 { 697 return in_control(so, cmd, nam, ifp); 698 } 699 700 static int 701 rip_stat(struct socket *so, struct stat *ub) 702 { 703 KASSERT(solocked(so)); 704 705 /* stat: don't bother with a blocksize. */ 706 return 0; 707 } 708 709 static int 710 rip_peeraddr(struct socket *so, struct sockaddr *nam) 711 { 712 int s; 713 714 KASSERT(solocked(so)); 715 KASSERT(sotoinpcb(so) != NULL); 716 KASSERT(nam != NULL); 717 718 s = splsoftnet(); 719 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 720 splx(s); 721 722 return 0; 723 } 724 725 static int 726 rip_sockaddr(struct socket *so, struct sockaddr *nam) 727 { 728 int s; 729 730 KASSERT(solocked(so)); 731 KASSERT(sotoinpcb(so) != NULL); 732 KASSERT(nam != NULL); 733 734 s = splsoftnet(); 735 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 736 splx(s); 737 738 return 0; 739 } 740 741 static int 742 rip_rcvd(struct socket *so, int flags, struct lwp *l) 743 { 744 KASSERT(solocked(so)); 745 746 return EOPNOTSUPP; 747 } 748 749 static int 750 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 751 { 752 KASSERT(solocked(so)); 753 754 return EOPNOTSUPP; 755 } 756 757 static int 758 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 759 struct mbuf *control, struct lwp *l) 760 { 761 struct inpcb *inp = sotoinpcb(so); 762 int error = 0; 763 int s; 764 765 KASSERT(solocked(so)); 766 KASSERT(inp != NULL); 767 KASSERT(m != NULL); 768 769 /* 770 * Ship a packet out. The appropriate raw output 771 * routine handles any massaging necessary. 772 */ 773 s = splsoftnet(); 774 if (nam) { 775 if ((so->so_state & SS_ISCONNECTED) != 0) { 776 error = EISCONN; 777 goto die; 778 } 779 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 780 if (error) 781 goto die; 782 } else { 783 if ((so->so_state & SS_ISCONNECTED) == 0) { 784 error = ENOTCONN; 785 goto die; 786 } 787 } 788 error = rip_output(m, inp, control, l); 789 m = NULL; 790 control = NULL; 791 if (nam) 792 rip_disconnect1(inp); 793 die: 794 if (m != NULL) 795 m_freem(m); 796 if (control != NULL) 797 m_freem(control); 798 799 splx(s); 800 return error; 801 } 802 803 static int 804 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 805 { 806 KASSERT(solocked(so)); 807 808 m_freem(m); 809 m_freem(control); 810 811 return EOPNOTSUPP; 812 } 813 814 static int 815 rip_purgeif(struct socket *so, struct ifnet *ifp) 816 { 817 int s; 818 819 s = splsoftnet(); 820 mutex_enter(softnet_lock); 821 in_pcbpurgeif0(&rawcbtable, ifp); 822 #ifdef NET_MPSAFE 823 mutex_exit(softnet_lock); 824 #endif 825 in_purgeif(ifp); 826 #ifdef NET_MPSAFE 827 mutex_enter(softnet_lock); 828 #endif 829 in_pcbpurgeif(&rawcbtable, ifp); 830 mutex_exit(softnet_lock); 831 splx(s); 832 833 return 0; 834 } 835 836 PR_WRAP_USRREQS(rip) 837 #define rip_attach rip_attach_wrapper 838 #define rip_detach rip_detach_wrapper 839 #define rip_accept rip_accept_wrapper 840 #define rip_bind rip_bind_wrapper 841 #define rip_listen rip_listen_wrapper 842 #define rip_connect rip_connect_wrapper 843 #define rip_connect2 rip_connect2_wrapper 844 #define rip_disconnect rip_disconnect_wrapper 845 #define rip_shutdown rip_shutdown_wrapper 846 #define rip_abort rip_abort_wrapper 847 #define rip_ioctl rip_ioctl_wrapper 848 #define rip_stat rip_stat_wrapper 849 #define rip_peeraddr rip_peeraddr_wrapper 850 #define rip_sockaddr rip_sockaddr_wrapper 851 #define rip_rcvd rip_rcvd_wrapper 852 #define rip_recvoob rip_recvoob_wrapper 853 #define rip_send rip_send_wrapper 854 #define rip_sendoob rip_sendoob_wrapper 855 #define rip_purgeif rip_purgeif_wrapper 856 857 const struct pr_usrreqs rip_usrreqs = { 858 .pr_attach = rip_attach, 859 .pr_detach = rip_detach, 860 .pr_accept = rip_accept, 861 .pr_bind = rip_bind, 862 .pr_listen = rip_listen, 863 .pr_connect = rip_connect, 864 .pr_connect2 = rip_connect2, 865 .pr_disconnect = rip_disconnect, 866 .pr_shutdown = rip_shutdown, 867 .pr_abort = rip_abort, 868 .pr_ioctl = rip_ioctl, 869 .pr_stat = rip_stat, 870 .pr_peeraddr = rip_peeraddr, 871 .pr_sockaddr = rip_sockaddr, 872 .pr_rcvd = rip_rcvd, 873 .pr_recvoob = rip_recvoob, 874 .pr_send = rip_send, 875 .pr_sendoob = rip_sendoob, 876 .pr_purgeif = rip_purgeif, 877 }; 878 879 static void 880 sysctl_net_inet_raw_setup(struct sysctllog **clog) 881 { 882 883 sysctl_createv(clog, 0, NULL, NULL, 884 CTLFLAG_PERMANENT, 885 CTLTYPE_NODE, "inet", NULL, 886 NULL, 0, NULL, 0, 887 CTL_NET, PF_INET, CTL_EOL); 888 sysctl_createv(clog, 0, NULL, NULL, 889 CTLFLAG_PERMANENT, 890 CTLTYPE_NODE, "raw", 891 SYSCTL_DESCR("Raw IPv4 settings"), 892 NULL, 0, NULL, 0, 893 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 894 895 sysctl_createv(clog, 0, NULL, NULL, 896 CTLFLAG_PERMANENT, 897 CTLTYPE_STRUCT, "pcblist", 898 SYSCTL_DESCR("Raw IPv4 control block list"), 899 sysctl_inpcblist, 0, &rawcbtable, 0, 900 CTL_NET, PF_INET, IPPROTO_RAW, 901 CTL_CREATE, CTL_EOL); 902 } 903
Indexes created Mon Sep 29 21:09:56 GMT 2025