raw_ip.c revision 1.169
1 /* $NetBSD: raw_ip.c,v 1.169 2018/02/26 09:04:29 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 1.169 2018/02/26 09:04:29 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 #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 && ipsec_in_reject(m, last)) { 208 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 209 /* do not inject data to pcb */ 210 } 211 #endif /*IPSEC*/ 212 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 213 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 214 n); 215 opts = NULL; 216 } 217 last = inp; 218 } 219 #if defined(IPSEC) 220 /* check AH/ESP integrity. */ 221 if (ipsec_used && last != NULL && ipsec_in_reject(m, last)) { 222 m_freem(m); 223 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 224 IP_STATDEC(IP_STAT_DELIVERED); 225 /* do not inject data to pcb */ 226 } else 227 #endif /*IPSEC*/ 228 if (last != NULL) 229 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 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 return; 242 } 243 244 int 245 rip_pcbnotify(struct inpcbtable *table, 246 struct in_addr faddr, struct in_addr laddr, int proto, int errno, 247 void (*notify)(struct inpcb *, int)) 248 { 249 struct inpcb_hdr *inph, *ninph; 250 int nmatch; 251 252 nmatch = 0; 253 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 254 struct inpcb *inp = (struct inpcb *)inph; 255 if (inp->inp_af != AF_INET) 256 continue; 257 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 258 continue; 259 if (in_hosteq(inp->inp_faddr, faddr) && 260 in_hosteq(inp->inp_laddr, laddr)) { 261 (*notify)(inp, errno); 262 nmatch++; 263 } 264 } 265 266 return nmatch; 267 } 268 269 void * 270 rip_ctlinput(int cmd, const struct sockaddr *sa, void *v) 271 { 272 struct ip *ip = v; 273 void (*notify)(struct inpcb *, int) = in_rtchange; 274 int errno; 275 276 if (sa->sa_family != AF_INET || 277 sa->sa_len != sizeof(struct sockaddr_in)) 278 return NULL; 279 if ((unsigned)cmd >= PRC_NCMDS) 280 return NULL; 281 errno = inetctlerrmap[cmd]; 282 if (PRC_IS_REDIRECT(cmd)) 283 notify = in_rtchange, ip = 0; 284 else if (cmd == PRC_HOSTDEAD) 285 ip = 0; 286 else if (errno == 0) 287 return NULL; 288 if (ip) { 289 rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr, 290 ip->ip_src, ip->ip_p, errno, notify); 291 292 /* XXX mapped address case */ 293 } else 294 in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno, 295 notify); 296 return NULL; 297 } 298 299 /* 300 * Generate IP header and pass packet to ip_output. 301 * Tack on options user may have setup with control call. 302 */ 303 int 304 rip_output(struct mbuf *m, struct inpcb *inp, struct mbuf *control, 305 struct lwp *l) 306 { 307 struct ip *ip; 308 struct mbuf *opts; 309 struct ip_pktopts pktopts; 310 kauth_cred_t cred; 311 int error, flags; 312 313 flags = (inp->inp_socket->so_options & SO_DONTROUTE) | 314 IP_ALLOWBROADCAST | IP_RETURNMTU; 315 316 if (l == NULL) 317 cred = NULL; 318 else 319 cred = l->l_cred; 320 321 /* Setup IP outgoing packet options */ 322 memset(&pktopts, 0, sizeof(pktopts)); 323 error = ip_setpktopts(control, &pktopts, &flags, inp, cred); 324 if (control != NULL) 325 m_freem(control); 326 if (error != 0) 327 goto release; 328 329 /* 330 * If the user handed us a complete IP packet, use it. 331 * Otherwise, allocate an mbuf for a header and fill it in. 332 */ 333 if ((inp->inp_flags & INP_HDRINCL) == 0) { 334 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 335 error = EMSGSIZE; 336 goto release; 337 } 338 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 339 if (!m) { 340 error = ENOBUFS; 341 goto release; 342 } 343 ip = mtod(m, struct ip *); 344 ip->ip_tos = 0; 345 ip->ip_off = htons(0); 346 ip->ip_p = inp->inp_ip.ip_p; 347 ip->ip_len = htons(m->m_pkthdr.len); 348 ip->ip_src = pktopts.ippo_laddr.sin_addr; 349 ip->ip_dst = inp->inp_faddr; 350 ip->ip_ttl = MAXTTL; 351 opts = inp->inp_options; 352 } else { 353 if (m->m_pkthdr.len > IP_MAXPACKET) { 354 error = EMSGSIZE; 355 goto release; 356 } 357 ip = mtod(m, struct ip *); 358 359 /* 360 * If the mbuf is read-only, we need to allocate 361 * a new mbuf for the header, since we need to 362 * modify the header. 363 */ 364 if (M_READONLY(m)) { 365 int hlen = ip->ip_hl << 2; 366 367 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 368 if (m == NULL) { 369 error = ENOMEM; /* XXX */ 370 goto release; 371 } 372 ip = mtod(m, struct ip *); 373 } 374 375 /* XXX userland passes ip_len and ip_off in host order */ 376 if (m->m_pkthdr.len != ip->ip_len) { 377 error = EINVAL; 378 goto release; 379 } 380 HTONS(ip->ip_len); 381 HTONS(ip->ip_off); 382 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 383 flags |= IP_NOIPNEWID; 384 opts = NULL; 385 /* XXX prevent ip_output from overwriting header fields */ 386 flags |= IP_RAWOUTPUT; 387 IP_STATINC(IP_STAT_RAWOUT); 388 } 389 390 /* 391 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 392 * will be stored in inp_errormtu. 393 */ 394 return ip_output(m, opts, &inp->inp_route, flags, pktopts.ippo_imo, 395 inp); 396 397 release: 398 if (m != NULL) 399 m_freem(m); 400 return error; 401 } 402 403 /* 404 * Raw IP socket option processing. 405 */ 406 int 407 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 408 { 409 struct inpcb *inp = sotoinpcb(so); 410 int error = 0; 411 int optval; 412 413 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 414 if (op == PRCO_GETOPT) { 415 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 416 error = sockopt_set(sopt, &optval, sizeof(optval)); 417 } else if (op == PRCO_SETOPT) { 418 error = sockopt_getint(sopt, &optval); 419 if (error) 420 goto out; 421 if (optval) { 422 inp->inp_flags &= ~INP_HDRINCL; 423 inp->inp_flags |= INP_NOHEADER; 424 } else 425 inp->inp_flags &= ~INP_NOHEADER; 426 } 427 goto out; 428 } else if (sopt->sopt_level != IPPROTO_IP) 429 return ip_ctloutput(op, so, sopt); 430 431 switch (op) { 432 433 case PRCO_SETOPT: 434 switch (sopt->sopt_name) { 435 case IP_HDRINCL: 436 error = sockopt_getint(sopt, &optval); 437 if (error) 438 break; 439 if (optval) 440 inp->inp_flags |= INP_HDRINCL; 441 else 442 inp->inp_flags &= ~INP_HDRINCL; 443 break; 444 445 #ifdef MROUTING 446 case MRT_INIT: 447 case MRT_DONE: 448 case MRT_ADD_VIF: 449 case MRT_DEL_VIF: 450 case MRT_ADD_MFC: 451 case MRT_DEL_MFC: 452 case MRT_ASSERT: 453 case MRT_API_CONFIG: 454 case MRT_ADD_BW_UPCALL: 455 case MRT_DEL_BW_UPCALL: 456 error = ip_mrouter_set(so, sopt); 457 break; 458 #endif 459 460 default: 461 error = ip_ctloutput(op, so, sopt); 462 break; 463 } 464 break; 465 466 case PRCO_GETOPT: 467 switch (sopt->sopt_name) { 468 case IP_HDRINCL: 469 optval = inp->inp_flags & INP_HDRINCL; 470 error = sockopt_set(sopt, &optval, sizeof(optval)); 471 break; 472 473 #ifdef MROUTING 474 case MRT_VERSION: 475 case MRT_ASSERT: 476 case MRT_API_SUPPORT: 477 case MRT_API_CONFIG: 478 error = ip_mrouter_get(so, sopt); 479 break; 480 #endif 481 482 default: 483 error = ip_ctloutput(op, so, sopt); 484 break; 485 } 486 break; 487 } 488 out: 489 return error; 490 } 491 492 int 493 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 494 { 495 496 if (IFNET_READER_EMPTY()) 497 return (EADDRNOTAVAIL); 498 if (addr->sin_family != AF_INET) 499 return (EAFNOSUPPORT); 500 inp->inp_faddr = addr->sin_addr; 501 return (0); 502 } 503 504 static void 505 rip_disconnect1(struct inpcb *inp) 506 { 507 508 inp->inp_faddr = zeroin_addr; 509 } 510 511 static int 512 rip_attach(struct socket *so, int proto) 513 { 514 struct inpcb *inp; 515 int error; 516 517 KASSERT(sotoinpcb(so) == NULL); 518 sosetlock(so); 519 520 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 521 error = soreserve(so, rip_sendspace, rip_recvspace); 522 if (error) { 523 return error; 524 } 525 } 526 527 error = in_pcballoc(so, &rawcbtable); 528 if (error) { 529 return error; 530 } 531 inp = sotoinpcb(so); 532 inp->inp_ip.ip_p = proto; 533 KASSERT(solocked(so)); 534 535 return 0; 536 } 537 538 static void 539 rip_detach(struct socket *so) 540 { 541 struct inpcb *inp; 542 543 KASSERT(solocked(so)); 544 inp = sotoinpcb(so); 545 KASSERT(inp != NULL); 546 547 #ifdef MROUTING 548 extern struct socket *ip_mrouter; 549 if (so == ip_mrouter) { 550 ip_mrouter_done(); 551 } 552 #endif 553 in_pcbdetach(inp); 554 } 555 556 static int 557 rip_accept(struct socket *so, struct sockaddr *nam) 558 { 559 KASSERT(solocked(so)); 560 561 panic("rip_accept"); 562 563 return EOPNOTSUPP; 564 } 565 566 static int 567 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 568 { 569 struct inpcb *inp = sotoinpcb(so); 570 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 571 int error = 0; 572 int s, ss; 573 struct ifaddr *ifa; 574 575 KASSERT(solocked(so)); 576 KASSERT(inp != NULL); 577 KASSERT(nam != NULL); 578 579 if (addr->sin_len != sizeof(*addr)) 580 return EINVAL; 581 582 s = splsoftnet(); 583 if (IFNET_READER_EMPTY()) { 584 error = EADDRNOTAVAIL; 585 goto release; 586 } 587 if (addr->sin_family != AF_INET) { 588 error = EAFNOSUPPORT; 589 goto release; 590 } 591 ss = pserialize_read_enter(); 592 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 593 !in_nullhost(addr->sin_addr)) 594 { 595 pserialize_read_exit(ss); 596 error = EADDRNOTAVAIL; 597 goto release; 598 } 599 if (ifa && (ifatoia(ifa))->ia4_flags & IN6_IFF_DUPLICATED) { 600 pserialize_read_exit(ss); 601 error = EADDRNOTAVAIL; 602 goto release; 603 } 604 pserialize_read_exit(ss); 605 606 inp->inp_laddr = addr->sin_addr; 607 608 release: 609 splx(s); 610 return error; 611 } 612 613 static int 614 rip_listen(struct socket *so, struct lwp *l) 615 { 616 KASSERT(solocked(so)); 617 618 return EOPNOTSUPP; 619 } 620 621 static int 622 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 623 { 624 struct inpcb *inp = sotoinpcb(so); 625 int error = 0; 626 int s; 627 628 KASSERT(solocked(so)); 629 KASSERT(inp != NULL); 630 KASSERT(nam != NULL); 631 632 s = splsoftnet(); 633 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 634 if (! error) 635 soisconnected(so); 636 splx(s); 637 638 return error; 639 } 640 641 static int 642 rip_connect2(struct socket *so, struct socket *so2) 643 { 644 KASSERT(solocked(so)); 645 646 return EOPNOTSUPP; 647 } 648 649 static int 650 rip_disconnect(struct socket *so) 651 { 652 struct inpcb *inp = sotoinpcb(so); 653 int s; 654 655 KASSERT(solocked(so)); 656 KASSERT(inp != NULL); 657 658 s = splsoftnet(); 659 soisdisconnected(so); 660 rip_disconnect1(inp); 661 splx(s); 662 663 return 0; 664 } 665 666 static int 667 rip_shutdown(struct socket *so) 668 { 669 int s; 670 671 KASSERT(solocked(so)); 672 673 /* 674 * Mark the connection as being incapable of further input. 675 */ 676 s = splsoftnet(); 677 socantsendmore(so); 678 splx(s); 679 680 return 0; 681 } 682 683 static int 684 rip_abort(struct socket *so) 685 { 686 KASSERT(solocked(so)); 687 688 panic("rip_abort"); 689 690 return EOPNOTSUPP; 691 } 692 693 static int 694 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 695 { 696 return in_control(so, cmd, nam, ifp); 697 } 698 699 static int 700 rip_stat(struct socket *so, struct stat *ub) 701 { 702 KASSERT(solocked(so)); 703 704 /* stat: don't bother with a blocksize. */ 705 return 0; 706 } 707 708 static int 709 rip_peeraddr(struct socket *so, struct sockaddr *nam) 710 { 711 int s; 712 713 KASSERT(solocked(so)); 714 KASSERT(sotoinpcb(so) != NULL); 715 KASSERT(nam != NULL); 716 717 s = splsoftnet(); 718 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 719 splx(s); 720 721 return 0; 722 } 723 724 static int 725 rip_sockaddr(struct socket *so, struct sockaddr *nam) 726 { 727 int s; 728 729 KASSERT(solocked(so)); 730 KASSERT(sotoinpcb(so) != NULL); 731 KASSERT(nam != NULL); 732 733 s = splsoftnet(); 734 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 735 splx(s); 736 737 return 0; 738 } 739 740 static int 741 rip_rcvd(struct socket *so, int flags, struct lwp *l) 742 { 743 KASSERT(solocked(so)); 744 745 return EOPNOTSUPP; 746 } 747 748 static int 749 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 750 { 751 KASSERT(solocked(so)); 752 753 return EOPNOTSUPP; 754 } 755 756 static int 757 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 758 struct mbuf *control, struct lwp *l) 759 { 760 struct inpcb *inp = sotoinpcb(so); 761 int error = 0; 762 int s; 763 764 KASSERT(solocked(so)); 765 KASSERT(inp != NULL); 766 KASSERT(m != NULL); 767 768 /* 769 * Ship a packet out. The appropriate raw output 770 * routine handles any massaging necessary. 771 */ 772 s = splsoftnet(); 773 if (nam) { 774 if ((so->so_state & SS_ISCONNECTED) != 0) { 775 error = EISCONN; 776 goto die; 777 } 778 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 779 if (error) 780 goto die; 781 } else { 782 if ((so->so_state & SS_ISCONNECTED) == 0) { 783 error = ENOTCONN; 784 goto die; 785 } 786 } 787 error = rip_output(m, inp, control, l); 788 m = NULL; 789 control = NULL; 790 if (nam) 791 rip_disconnect1(inp); 792 die: 793 if (m != NULL) 794 m_freem(m); 795 if (control != NULL) 796 m_freem(control); 797 798 splx(s); 799 return error; 800 } 801 802 static int 803 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 804 { 805 KASSERT(solocked(so)); 806 807 m_freem(m); 808 m_freem(control); 809 810 return EOPNOTSUPP; 811 } 812 813 static int 814 rip_purgeif(struct socket *so, struct ifnet *ifp) 815 { 816 int s; 817 818 s = splsoftnet(); 819 mutex_enter(softnet_lock); 820 in_pcbpurgeif0(&rawcbtable, ifp); 821 #ifdef NET_MPSAFE 822 mutex_exit(softnet_lock); 823 #endif 824 in_purgeif(ifp); 825 #ifdef NET_MPSAFE 826 mutex_enter(softnet_lock); 827 #endif 828 in_pcbpurgeif(&rawcbtable, ifp); 829 mutex_exit(softnet_lock); 830 splx(s); 831 832 return 0; 833 } 834 835 PR_WRAP_USRREQS(rip) 836 #define rip_attach rip_attach_wrapper 837 #define rip_detach rip_detach_wrapper 838 #define rip_accept rip_accept_wrapper 839 #define rip_bind rip_bind_wrapper 840 #define rip_listen rip_listen_wrapper 841 #define rip_connect rip_connect_wrapper 842 #define rip_connect2 rip_connect2_wrapper 843 #define rip_disconnect rip_disconnect_wrapper 844 #define rip_shutdown rip_shutdown_wrapper 845 #define rip_abort rip_abort_wrapper 846 #define rip_ioctl rip_ioctl_wrapper 847 #define rip_stat rip_stat_wrapper 848 #define rip_peeraddr rip_peeraddr_wrapper 849 #define rip_sockaddr rip_sockaddr_wrapper 850 #define rip_rcvd rip_rcvd_wrapper 851 #define rip_recvoob rip_recvoob_wrapper 852 #define rip_send rip_send_wrapper 853 #define rip_sendoob rip_sendoob_wrapper 854 #define rip_purgeif rip_purgeif_wrapper 855 856 const struct pr_usrreqs rip_usrreqs = { 857 .pr_attach = rip_attach, 858 .pr_detach = rip_detach, 859 .pr_accept = rip_accept, 860 .pr_bind = rip_bind, 861 .pr_listen = rip_listen, 862 .pr_connect = rip_connect, 863 .pr_connect2 = rip_connect2, 864 .pr_disconnect = rip_disconnect, 865 .pr_shutdown = rip_shutdown, 866 .pr_abort = rip_abort, 867 .pr_ioctl = rip_ioctl, 868 .pr_stat = rip_stat, 869 .pr_peeraddr = rip_peeraddr, 870 .pr_sockaddr = rip_sockaddr, 871 .pr_rcvd = rip_rcvd, 872 .pr_recvoob = rip_recvoob, 873 .pr_send = rip_send, 874 .pr_sendoob = rip_sendoob, 875 .pr_purgeif = rip_purgeif, 876 }; 877 878 static void 879 sysctl_net_inet_raw_setup(struct sysctllog **clog) 880 { 881 882 sysctl_createv(clog, 0, NULL, NULL, 883 CTLFLAG_PERMANENT, 884 CTLTYPE_NODE, "inet", NULL, 885 NULL, 0, NULL, 0, 886 CTL_NET, PF_INET, CTL_EOL); 887 sysctl_createv(clog, 0, NULL, NULL, 888 CTLFLAG_PERMANENT, 889 CTLTYPE_NODE, "raw", 890 SYSCTL_DESCR("Raw IPv4 settings"), 891 NULL, 0, NULL, 0, 892 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 893 894 sysctl_createv(clog, 0, NULL, NULL, 895 CTLFLAG_PERMANENT, 896 CTLTYPE_STRUCT, "pcblist", 897 SYSCTL_DESCR("Raw IPv4 control block list"), 898 sysctl_inpcblist, 0, &rawcbtable, 0, 899 CTL_NET, PF_INET, IPPROTO_RAW, 900 CTL_CREATE, CTL_EOL); 901 } 902
Indexes created Mon Sep 29 21:09:56 GMT 2025