raw_ip.c revision 1.165
1 /* $NetBSD: raw_ip.c,v 1.165 2017/07/06 17:08:57 christos 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 1.165 2017/07/06 17:08:57 christos 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 #include <netipsec/ipsec_private.h> 105 #endif /* IPSEC */ 106 107 struct inpcbtable rawcbtable; 108 109 int rip_pcbnotify(struct inpcbtable *, struct in_addr, 110 struct in_addr, int, int, void (*)(struct inpcb *, int)); 111 static int rip_connect_pcb(struct inpcb *, struct sockaddr_in *); 112 static void rip_disconnect1(struct inpcb *); 113 114 static void sysctl_net_inet_raw_setup(struct sysctllog **); 115 116 /* 117 * Nominal space allocated to a raw ip socket. 118 */ 119 #define RIPSNDQ 8192 120 #define RIPRCVQ 8192 121 122 static u_long rip_sendspace = RIPSNDQ; 123 static u_long rip_recvspace = RIPRCVQ; 124 125 /* 126 * Raw interface to IP protocol. 127 */ 128 129 /* 130 * Initialize raw connection block q. 131 */ 132 void 133 rip_init(void) 134 { 135 136 sysctl_net_inet_raw_setup(NULL); 137 in_pcbinit(&rawcbtable, 1, 1); 138 } 139 140 static void 141 rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa, 142 int hlen, struct mbuf *opts, struct mbuf *n) 143 { 144 if (last->inp_flags & INP_NOHEADER) 145 m_adj(n, hlen); 146 if (last->inp_flags & INP_CONTROLOPTS 147 || SOOPT_TIMESTAMP(last->inp_socket->so_options)) 148 ip_savecontrol(last, &opts, ip, n); 149 if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) { 150 /* should notify about lost packet */ 151 m_freem(n); 152 if (opts) 153 m_freem(opts); 154 } else 155 sorwakeup(last->inp_socket); 156 } 157 158 /* 159 * Setup generic address and protocol structures 160 * for raw_input routine, then pass them along with 161 * mbuf chain. 162 */ 163 void 164 rip_input(struct mbuf *m, ...) 165 { 166 int hlen, proto; 167 struct ip *ip = mtod(m, struct ip *); 168 struct inpcb_hdr *inph; 169 struct inpcb *inp; 170 struct inpcb *last = NULL; 171 struct mbuf *n, *opts = NULL; 172 struct sockaddr_in ripsrc; 173 va_list ap; 174 175 va_start(ap, m); 176 (void)va_arg(ap, int); /* ignore value, advance ap */ 177 proto = va_arg(ap, int); 178 va_end(ap); 179 180 sockaddr_in_init(&ripsrc, &ip->ip_src, 0); 181 182 /* 183 * XXX Compatibility: programs using raw IP expect ip_len 184 * XXX to have the header length subtracted, and in host order. 185 * XXX ip_off is also expected to be host order. 186 */ 187 hlen = ip->ip_hl << 2; 188 ip->ip_len = ntohs(ip->ip_len) - hlen; 189 NTOHS(ip->ip_off); 190 191 TAILQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) { 192 inp = (struct inpcb *)inph; 193 if (inp->inp_af != AF_INET) 194 continue; 195 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 196 continue; 197 if (!in_nullhost(inp->inp_laddr) && 198 !in_hosteq(inp->inp_laddr, ip->ip_dst)) 199 continue; 200 if (!in_nullhost(inp->inp_faddr) && 201 !in_hosteq(inp->inp_faddr, ip->ip_src)) 202 continue; 203 if (last == NULL) 204 ; 205 #if defined(IPSEC) 206 /* check AH/ESP integrity. */ 207 else if (ipsec_used && 208 ipsec4_in_reject(m, last)) { 209 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 210 /* do not inject data to pcb */ 211 } 212 #endif /*IPSEC*/ 213 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 214 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 215 n); 216 opts = NULL; 217 } 218 last = inp; 219 } 220 #if defined(IPSEC) 221 /* check AH/ESP integrity. */ 222 if (ipsec_used && last != NULL 223 && ipsec4_in_reject(m, last)) { 224 m_freem(m); 225 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 226 IP_STATDEC(IP_STAT_DELIVERED); 227 /* do not inject data to pcb */ 228 } else 229 #endif /*IPSEC*/ 230 if (last != NULL) 231 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m); 232 else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) { 233 uint64_t *ips; 234 235 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 236 0, 0); 237 ips = IP_STAT_GETREF(); 238 ips[IP_STAT_NOPROTO]++; 239 ips[IP_STAT_DELIVERED]--; 240 IP_STAT_PUTREF(); 241 } else 242 m_freem(m); 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) 307 { 308 struct ip *ip; 309 struct mbuf *opts; 310 int flags; 311 312 flags = 313 (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST 314 | IP_RETURNMTU; 315 316 /* 317 * If the user handed us a complete IP packet, use it. 318 * Otherwise, allocate an mbuf for a header and fill it in. 319 */ 320 if ((inp->inp_flags & INP_HDRINCL) == 0) { 321 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 322 m_freem(m); 323 return (EMSGSIZE); 324 } 325 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 326 if (!m) 327 return (ENOBUFS); 328 ip = mtod(m, struct ip *); 329 ip->ip_tos = 0; 330 ip->ip_off = htons(0); 331 ip->ip_p = inp->inp_ip.ip_p; 332 ip->ip_len = htons(m->m_pkthdr.len); 333 ip->ip_src = inp->inp_laddr; 334 ip->ip_dst = inp->inp_faddr; 335 ip->ip_ttl = MAXTTL; 336 opts = inp->inp_options; 337 } else { 338 if (m->m_pkthdr.len > IP_MAXPACKET) { 339 m_freem(m); 340 return (EMSGSIZE); 341 } 342 ip = mtod(m, struct ip *); 343 344 /* 345 * If the mbuf is read-only, we need to allocate 346 * a new mbuf for the header, since we need to 347 * modify the header. 348 */ 349 if (M_READONLY(m)) { 350 int hlen = ip->ip_hl << 2; 351 352 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 353 if (m == NULL) 354 return (ENOMEM); /* XXX */ 355 ip = mtod(m, struct ip *); 356 } 357 358 /* XXX userland passes ip_len and ip_off in host order */ 359 if (m->m_pkthdr.len != ip->ip_len) { 360 m_freem(m); 361 return (EINVAL); 362 } 363 HTONS(ip->ip_len); 364 HTONS(ip->ip_off); 365 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 366 flags |= IP_NOIPNEWID; 367 opts = NULL; 368 /* XXX prevent ip_output from overwriting header fields */ 369 flags |= IP_RAWOUTPUT; 370 IP_STATINC(IP_STAT_RAWOUT); 371 } 372 373 /* 374 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 375 * will be stored in inp_errormtu. 376 */ 377 return ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions, 378 inp); 379 } 380 381 /* 382 * Raw IP socket option processing. 383 */ 384 int 385 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 386 { 387 struct inpcb *inp = sotoinpcb(so); 388 int error = 0; 389 int optval; 390 391 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 392 if (op == PRCO_GETOPT) { 393 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 394 error = sockopt_set(sopt, &optval, sizeof(optval)); 395 } else if (op == PRCO_SETOPT) { 396 error = sockopt_getint(sopt, &optval); 397 if (error) 398 goto out; 399 if (optval) { 400 inp->inp_flags &= ~INP_HDRINCL; 401 inp->inp_flags |= INP_NOHEADER; 402 } else 403 inp->inp_flags &= ~INP_NOHEADER; 404 } 405 goto out; 406 } else if (sopt->sopt_level != IPPROTO_IP) 407 return ip_ctloutput(op, so, sopt); 408 409 switch (op) { 410 411 case PRCO_SETOPT: 412 switch (sopt->sopt_name) { 413 case IP_HDRINCL: 414 error = sockopt_getint(sopt, &optval); 415 if (error) 416 break; 417 if (optval) 418 inp->inp_flags |= INP_HDRINCL; 419 else 420 inp->inp_flags &= ~INP_HDRINCL; 421 break; 422 423 #ifdef MROUTING 424 case MRT_INIT: 425 case MRT_DONE: 426 case MRT_ADD_VIF: 427 case MRT_DEL_VIF: 428 case MRT_ADD_MFC: 429 case MRT_DEL_MFC: 430 case MRT_ASSERT: 431 case MRT_API_CONFIG: 432 case MRT_ADD_BW_UPCALL: 433 case MRT_DEL_BW_UPCALL: 434 error = ip_mrouter_set(so, sopt); 435 break; 436 #endif 437 438 default: 439 error = ip_ctloutput(op, so, sopt); 440 break; 441 } 442 break; 443 444 case PRCO_GETOPT: 445 switch (sopt->sopt_name) { 446 case IP_HDRINCL: 447 optval = inp->inp_flags & INP_HDRINCL; 448 error = sockopt_set(sopt, &optval, sizeof(optval)); 449 break; 450 451 #ifdef MROUTING 452 case MRT_VERSION: 453 case MRT_ASSERT: 454 case MRT_API_SUPPORT: 455 case MRT_API_CONFIG: 456 error = ip_mrouter_get(so, sopt); 457 break; 458 #endif 459 460 default: 461 error = ip_ctloutput(op, so, sopt); 462 break; 463 } 464 break; 465 } 466 out: 467 return error; 468 } 469 470 int 471 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 472 { 473 474 if (IFNET_READER_EMPTY()) 475 return (EADDRNOTAVAIL); 476 if (addr->sin_family != AF_INET) 477 return (EAFNOSUPPORT); 478 inp->inp_faddr = addr->sin_addr; 479 return (0); 480 } 481 482 static void 483 rip_disconnect1(struct inpcb *inp) 484 { 485 486 inp->inp_faddr = zeroin_addr; 487 } 488 489 static int 490 rip_attach(struct socket *so, int proto) 491 { 492 struct inpcb *inp; 493 int error; 494 495 KASSERT(sotoinpcb(so) == NULL); 496 sosetlock(so); 497 498 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 499 error = soreserve(so, rip_sendspace, rip_recvspace); 500 if (error) { 501 return error; 502 } 503 } 504 505 error = in_pcballoc(so, &rawcbtable); 506 if (error) { 507 return error; 508 } 509 inp = sotoinpcb(so); 510 inp->inp_ip.ip_p = proto; 511 KASSERT(solocked(so)); 512 513 return 0; 514 } 515 516 static void 517 rip_detach(struct socket *so) 518 { 519 struct inpcb *inp; 520 521 KASSERT(solocked(so)); 522 inp = sotoinpcb(so); 523 KASSERT(inp != NULL); 524 525 #ifdef MROUTING 526 extern struct socket *ip_mrouter; 527 if (so == ip_mrouter) { 528 ip_mrouter_done(); 529 } 530 #endif 531 in_pcbdetach(inp); 532 } 533 534 static int 535 rip_accept(struct socket *so, struct sockaddr *nam) 536 { 537 KASSERT(solocked(so)); 538 539 panic("rip_accept"); 540 541 return EOPNOTSUPP; 542 } 543 544 static int 545 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 546 { 547 struct inpcb *inp = sotoinpcb(so); 548 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 549 int error = 0; 550 int s, ss; 551 struct ifaddr *ifa; 552 553 KASSERT(solocked(so)); 554 KASSERT(inp != NULL); 555 KASSERT(nam != NULL); 556 557 if (addr->sin_len != sizeof(*addr)) 558 return EINVAL; 559 560 s = splsoftnet(); 561 if (IFNET_READER_EMPTY()) { 562 error = EADDRNOTAVAIL; 563 goto release; 564 } 565 if (addr->sin_family != AF_INET) { 566 error = EAFNOSUPPORT; 567 goto release; 568 } 569 ss = pserialize_read_enter(); 570 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 571 !in_nullhost(addr->sin_addr)) 572 { 573 pserialize_read_exit(ss); 574 error = EADDRNOTAVAIL; 575 goto release; 576 } 577 if (ifa && (ifatoia(ifa))->ia4_flags & IN6_IFF_DUPLICATED) { 578 pserialize_read_exit(ss); 579 error = EADDRNOTAVAIL; 580 goto release; 581 } 582 pserialize_read_exit(ss); 583 584 inp->inp_laddr = addr->sin_addr; 585 586 release: 587 splx(s); 588 return error; 589 } 590 591 static int 592 rip_listen(struct socket *so, struct lwp *l) 593 { 594 KASSERT(solocked(so)); 595 596 return EOPNOTSUPP; 597 } 598 599 static int 600 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 601 { 602 struct inpcb *inp = sotoinpcb(so); 603 int error = 0; 604 int s; 605 606 KASSERT(solocked(so)); 607 KASSERT(inp != NULL); 608 KASSERT(nam != NULL); 609 610 s = splsoftnet(); 611 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 612 if (! error) 613 soisconnected(so); 614 splx(s); 615 616 return error; 617 } 618 619 static int 620 rip_connect2(struct socket *so, struct socket *so2) 621 { 622 KASSERT(solocked(so)); 623 624 return EOPNOTSUPP; 625 } 626 627 static int 628 rip_disconnect(struct socket *so) 629 { 630 struct inpcb *inp = sotoinpcb(so); 631 int s; 632 633 KASSERT(solocked(so)); 634 KASSERT(inp != NULL); 635 636 s = splsoftnet(); 637 soisdisconnected(so); 638 rip_disconnect1(inp); 639 splx(s); 640 641 return 0; 642 } 643 644 static int 645 rip_shutdown(struct socket *so) 646 { 647 int s; 648 649 KASSERT(solocked(so)); 650 651 /* 652 * Mark the connection as being incapable of further input. 653 */ 654 s = splsoftnet(); 655 socantsendmore(so); 656 splx(s); 657 658 return 0; 659 } 660 661 static int 662 rip_abort(struct socket *so) 663 { 664 KASSERT(solocked(so)); 665 666 panic("rip_abort"); 667 668 return EOPNOTSUPP; 669 } 670 671 static int 672 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 673 { 674 return in_control(so, cmd, nam, ifp); 675 } 676 677 static int 678 rip_stat(struct socket *so, struct stat *ub) 679 { 680 KASSERT(solocked(so)); 681 682 /* stat: don't bother with a blocksize. */ 683 return 0; 684 } 685 686 static int 687 rip_peeraddr(struct socket *so, struct sockaddr *nam) 688 { 689 int s; 690 691 KASSERT(solocked(so)); 692 KASSERT(sotoinpcb(so) != NULL); 693 KASSERT(nam != NULL); 694 695 s = splsoftnet(); 696 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 697 splx(s); 698 699 return 0; 700 } 701 702 static int 703 rip_sockaddr(struct socket *so, struct sockaddr *nam) 704 { 705 int s; 706 707 KASSERT(solocked(so)); 708 KASSERT(sotoinpcb(so) != NULL); 709 KASSERT(nam != NULL); 710 711 s = splsoftnet(); 712 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 713 splx(s); 714 715 return 0; 716 } 717 718 static int 719 rip_rcvd(struct socket *so, int flags, struct lwp *l) 720 { 721 KASSERT(solocked(so)); 722 723 return EOPNOTSUPP; 724 } 725 726 static int 727 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 728 { 729 KASSERT(solocked(so)); 730 731 return EOPNOTSUPP; 732 } 733 734 static int 735 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 736 struct mbuf *control, struct lwp *l) 737 { 738 struct inpcb *inp = sotoinpcb(so); 739 int error = 0; 740 int s; 741 742 KASSERT(solocked(so)); 743 KASSERT(inp != NULL); 744 KASSERT(m != NULL); 745 746 /* 747 * Ship a packet out. The appropriate raw output 748 * routine handles any massaging necessary. 749 */ 750 if (control && control->m_len) { 751 m_freem(control); 752 m_freem(m); 753 return EINVAL; 754 } 755 756 s = splsoftnet(); 757 if (nam) { 758 if ((so->so_state & SS_ISCONNECTED) != 0) { 759 error = EISCONN; 760 goto die; 761 } 762 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 763 if (error) { 764 die: 765 m_freem(m); 766 splx(s); 767 return error; 768 } 769 } else { 770 if ((so->so_state & SS_ISCONNECTED) == 0) { 771 error = ENOTCONN; 772 goto die; 773 } 774 } 775 error = rip_output(m, inp); 776 if (nam) 777 rip_disconnect1(inp); 778 779 splx(s); 780 return error; 781 } 782 783 static int 784 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 785 { 786 KASSERT(solocked(so)); 787 788 m_freem(m); 789 m_freem(control); 790 791 return EOPNOTSUPP; 792 } 793 794 static int 795 rip_purgeif(struct socket *so, struct ifnet *ifp) 796 { 797 int s; 798 799 s = splsoftnet(); 800 mutex_enter(softnet_lock); 801 in_pcbpurgeif0(&rawcbtable, ifp); 802 #ifdef NET_MPSAFE 803 mutex_exit(softnet_lock); 804 #endif 805 in_purgeif(ifp); 806 #ifdef NET_MPSAFE 807 mutex_enter(softnet_lock); 808 #endif 809 in_pcbpurgeif(&rawcbtable, ifp); 810 mutex_exit(softnet_lock); 811 splx(s); 812 813 return 0; 814 } 815 816 PR_WRAP_USRREQS(rip) 817 #define rip_attach rip_attach_wrapper 818 #define rip_detach rip_detach_wrapper 819 #define rip_accept rip_accept_wrapper 820 #define rip_bind rip_bind_wrapper 821 #define rip_listen rip_listen_wrapper 822 #define rip_connect rip_connect_wrapper 823 #define rip_connect2 rip_connect2_wrapper 824 #define rip_disconnect rip_disconnect_wrapper 825 #define rip_shutdown rip_shutdown_wrapper 826 #define rip_abort rip_abort_wrapper 827 #define rip_ioctl rip_ioctl_wrapper 828 #define rip_stat rip_stat_wrapper 829 #define rip_peeraddr rip_peeraddr_wrapper 830 #define rip_sockaddr rip_sockaddr_wrapper 831 #define rip_rcvd rip_rcvd_wrapper 832 #define rip_recvoob rip_recvoob_wrapper 833 #define rip_send rip_send_wrapper 834 #define rip_sendoob rip_sendoob_wrapper 835 #define rip_purgeif rip_purgeif_wrapper 836 837 const struct pr_usrreqs rip_usrreqs = { 838 .pr_attach = rip_attach, 839 .pr_detach = rip_detach, 840 .pr_accept = rip_accept, 841 .pr_bind = rip_bind, 842 .pr_listen = rip_listen, 843 .pr_connect = rip_connect, 844 .pr_connect2 = rip_connect2, 845 .pr_disconnect = rip_disconnect, 846 .pr_shutdown = rip_shutdown, 847 .pr_abort = rip_abort, 848 .pr_ioctl = rip_ioctl, 849 .pr_stat = rip_stat, 850 .pr_peeraddr = rip_peeraddr, 851 .pr_sockaddr = rip_sockaddr, 852 .pr_rcvd = rip_rcvd, 853 .pr_recvoob = rip_recvoob, 854 .pr_send = rip_send, 855 .pr_sendoob = rip_sendoob, 856 .pr_purgeif = rip_purgeif, 857 }; 858 859 static void 860 sysctl_net_inet_raw_setup(struct sysctllog **clog) 861 { 862 863 sysctl_createv(clog, 0, NULL, NULL, 864 CTLFLAG_PERMANENT, 865 CTLTYPE_NODE, "inet", NULL, 866 NULL, 0, NULL, 0, 867 CTL_NET, PF_INET, CTL_EOL); 868 sysctl_createv(clog, 0, NULL, NULL, 869 CTLFLAG_PERMANENT, 870 CTLTYPE_NODE, "raw", 871 SYSCTL_DESCR("Raw IPv4 settings"), 872 NULL, 0, NULL, 0, 873 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 874 875 sysctl_createv(clog, 0, NULL, NULL, 876 CTLFLAG_PERMANENT, 877 CTLTYPE_STRUCT, "pcblist", 878 SYSCTL_DESCR("Raw IPv4 control block list"), 879 sysctl_inpcblist, 0, &rawcbtable, 0, 880 CTL_NET, PF_INET, IPPROTO_RAW, 881 CTL_CREATE, CTL_EOL); 882 } 883
Indexes created Mon Sep 29 21:09:56 GMT 2025