raw_ip.c revision 1.159
1 /* $NetBSD: raw_ip.c,v 1.159 2016/08/01 03:15:31 ozaki-r 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 1.159 2016/08/01 03:15:31 ozaki-r Exp $"); 69 70 #ifdef _KERNEL_OPT 71 #include "opt_inet.h" 72 #include "opt_compat_netbsd.h" 73 #include "opt_ipsec.h" 74 #include "opt_mrouting.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 #ifdef COMPAT_50 108 #include <compat/sys/socket.h> 109 #endif 110 111 struct inpcbtable rawcbtable; 112 113 int rip_pcbnotify(struct inpcbtable *, struct in_addr, 114 struct in_addr, int, int, void (*)(struct inpcb *, int)); 115 static int rip_connect_pcb(struct inpcb *, struct sockaddr_in *); 116 static void rip_disconnect1(struct inpcb *); 117 118 static void sysctl_net_inet_raw_setup(struct sysctllog **); 119 120 /* 121 * Nominal space allocated to a raw ip socket. 122 */ 123 #define RIPSNDQ 8192 124 #define RIPRCVQ 8192 125 126 static u_long rip_sendspace = RIPSNDQ; 127 static u_long rip_recvspace = RIPRCVQ; 128 129 /* 130 * Raw interface to IP protocol. 131 */ 132 133 /* 134 * Initialize raw connection block q. 135 */ 136 void 137 rip_init(void) 138 { 139 140 sysctl_net_inet_raw_setup(NULL); 141 in_pcbinit(&rawcbtable, 1, 1); 142 } 143 144 static void 145 rip_sbappendaddr(struct inpcb *last, struct ip *ip, const struct sockaddr *sa, 146 int hlen, struct mbuf *opts, struct mbuf *n) 147 { 148 if (last->inp_flags & INP_NOHEADER) 149 m_adj(n, hlen); 150 if (last->inp_flags & INP_CONTROLOPTS 151 #ifdef SO_OTIMESTAMP 152 || last->inp_socket->so_options & SO_OTIMESTAMP 153 #endif 154 || last->inp_socket->so_options & SO_TIMESTAMP) 155 ip_savecontrol(last, &opts, ip, n); 156 if (sbappendaddr(&last->inp_socket->so_rcv, sa, n, opts) == 0) { 157 /* should notify about lost packet */ 158 m_freem(n); 159 if (opts) 160 m_freem(opts); 161 } else 162 sorwakeup(last->inp_socket); 163 } 164 165 /* 166 * Setup generic address and protocol structures 167 * for raw_input routine, then pass them along with 168 * mbuf chain. 169 */ 170 void 171 rip_input(struct mbuf *m, ...) 172 { 173 int hlen, proto; 174 struct ip *ip = mtod(m, struct ip *); 175 struct inpcb_hdr *inph; 176 struct inpcb *inp; 177 struct inpcb *last = NULL; 178 struct mbuf *n, *opts = NULL; 179 struct sockaddr_in ripsrc; 180 va_list ap; 181 182 va_start(ap, m); 183 (void)va_arg(ap, int); /* ignore value, advance ap */ 184 proto = va_arg(ap, int); 185 va_end(ap); 186 187 sockaddr_in_init(&ripsrc, &ip->ip_src, 0); 188 189 /* 190 * XXX Compatibility: programs using raw IP expect ip_len 191 * XXX to have the header length subtracted, and in host order. 192 * XXX ip_off is also expected to be host order. 193 */ 194 hlen = ip->ip_hl << 2; 195 ip->ip_len = ntohs(ip->ip_len) - hlen; 196 NTOHS(ip->ip_off); 197 198 TAILQ_FOREACH(inph, &rawcbtable.inpt_queue, inph_queue) { 199 inp = (struct inpcb *)inph; 200 if (inp->inp_af != AF_INET) 201 continue; 202 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 203 continue; 204 if (!in_nullhost(inp->inp_laddr) && 205 !in_hosteq(inp->inp_laddr, ip->ip_dst)) 206 continue; 207 if (!in_nullhost(inp->inp_faddr) && 208 !in_hosteq(inp->inp_faddr, ip->ip_src)) 209 continue; 210 if (last == NULL) 211 ; 212 #if defined(IPSEC) 213 /* check AH/ESP integrity. */ 214 else if (ipsec_used && 215 ipsec4_in_reject_so(m, last->inp_socket)) { 216 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 217 /* do not inject data to pcb */ 218 } 219 #endif /*IPSEC*/ 220 else if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 221 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, 222 n); 223 opts = NULL; 224 } 225 last = inp; 226 } 227 #if defined(IPSEC) 228 /* check AH/ESP integrity. */ 229 if (ipsec_used && last != NULL 230 && ipsec4_in_reject_so(m, last->inp_socket)) { 231 m_freem(m); 232 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 233 IP_STATDEC(IP_STAT_DELIVERED); 234 /* do not inject data to pcb */ 235 } else 236 #endif /*IPSEC*/ 237 if (last != NULL) 238 rip_sbappendaddr(last, ip, sintosa(&ripsrc), hlen, opts, m); 239 else if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) { 240 uint64_t *ips; 241 242 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 243 0, 0); 244 ips = IP_STAT_GETREF(); 245 ips[IP_STAT_NOPROTO]++; 246 ips[IP_STAT_DELIVERED]--; 247 IP_STAT_PUTREF(); 248 } else 249 m_freem(m); 250 return; 251 } 252 253 int 254 rip_pcbnotify(struct inpcbtable *table, 255 struct in_addr faddr, struct in_addr laddr, int proto, int errno, 256 void (*notify)(struct inpcb *, int)) 257 { 258 struct inpcb_hdr *inph, *ninph; 259 int nmatch; 260 261 nmatch = 0; 262 TAILQ_FOREACH_SAFE(inph, &table->inpt_queue, inph_queue, ninph) { 263 struct inpcb *inp = (struct inpcb *)inph; 264 if (inp->inp_af != AF_INET) 265 continue; 266 if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != proto) 267 continue; 268 if (in_hosteq(inp->inp_faddr, faddr) && 269 in_hosteq(inp->inp_laddr, laddr)) { 270 (*notify)(inp, errno); 271 nmatch++; 272 } 273 } 274 275 return nmatch; 276 } 277 278 void * 279 rip_ctlinput(int cmd, const struct sockaddr *sa, void *v) 280 { 281 struct ip *ip = v; 282 void (*notify)(struct inpcb *, int) = in_rtchange; 283 int errno; 284 285 if (sa->sa_family != AF_INET || 286 sa->sa_len != sizeof(struct sockaddr_in)) 287 return NULL; 288 if ((unsigned)cmd >= PRC_NCMDS) 289 return NULL; 290 errno = inetctlerrmap[cmd]; 291 if (PRC_IS_REDIRECT(cmd)) 292 notify = in_rtchange, ip = 0; 293 else if (cmd == PRC_HOSTDEAD) 294 ip = 0; 295 else if (errno == 0) 296 return NULL; 297 if (ip) { 298 rip_pcbnotify(&rawcbtable, satocsin(sa)->sin_addr, 299 ip->ip_src, ip->ip_p, errno, notify); 300 301 /* XXX mapped address case */ 302 } else 303 in_pcbnotifyall(&rawcbtable, satocsin(sa)->sin_addr, errno, 304 notify); 305 return NULL; 306 } 307 308 /* 309 * Generate IP header and pass packet to ip_output. 310 * Tack on options user may have setup with control call. 311 */ 312 int 313 rip_output(struct mbuf *m, struct inpcb *inp) 314 { 315 struct ip *ip; 316 struct mbuf *opts; 317 int flags; 318 319 flags = 320 (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST 321 | IP_RETURNMTU; 322 323 /* 324 * If the user handed us a complete IP packet, use it. 325 * Otherwise, allocate an mbuf for a header and fill it in. 326 */ 327 if ((inp->inp_flags & INP_HDRINCL) == 0) { 328 if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) { 329 m_freem(m); 330 return (EMSGSIZE); 331 } 332 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT); 333 if (!m) 334 return (ENOBUFS); 335 ip = mtod(m, struct ip *); 336 ip->ip_tos = 0; 337 ip->ip_off = htons(0); 338 ip->ip_p = inp->inp_ip.ip_p; 339 ip->ip_len = htons(m->m_pkthdr.len); 340 ip->ip_src = inp->inp_laddr; 341 ip->ip_dst = inp->inp_faddr; 342 ip->ip_ttl = MAXTTL; 343 opts = inp->inp_options; 344 } else { 345 if (m->m_pkthdr.len > IP_MAXPACKET) { 346 m_freem(m); 347 return (EMSGSIZE); 348 } 349 ip = mtod(m, struct ip *); 350 351 /* 352 * If the mbuf is read-only, we need to allocate 353 * a new mbuf for the header, since we need to 354 * modify the header. 355 */ 356 if (M_READONLY(m)) { 357 int hlen = ip->ip_hl << 2; 358 359 m = m_copyup(m, hlen, (max_linkhdr + 3) & ~3); 360 if (m == NULL) 361 return (ENOMEM); /* XXX */ 362 ip = mtod(m, struct ip *); 363 } 364 365 /* XXX userland passes ip_len and ip_off in host order */ 366 if (m->m_pkthdr.len != ip->ip_len) { 367 m_freem(m); 368 return (EINVAL); 369 } 370 HTONS(ip->ip_len); 371 HTONS(ip->ip_off); 372 if (ip->ip_id != 0 || m->m_pkthdr.len < IP_MINFRAGSIZE) 373 flags |= IP_NOIPNEWID; 374 opts = NULL; 375 /* XXX prevent ip_output from overwriting header fields */ 376 flags |= IP_RAWOUTPUT; 377 IP_STATINC(IP_STAT_RAWOUT); 378 } 379 380 /* 381 * IP output. Note: if IP_RETURNMTU flag is set, the MTU size 382 * will be stored in inp_errormtu. 383 */ 384 return ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions, 385 inp->inp_socket); 386 } 387 388 /* 389 * Raw IP socket option processing. 390 */ 391 int 392 rip_ctloutput(int op, struct socket *so, struct sockopt *sopt) 393 { 394 struct inpcb *inp = sotoinpcb(so); 395 int error = 0; 396 int optval; 397 398 if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_NOHEADER) { 399 if (op == PRCO_GETOPT) { 400 optval = (inp->inp_flags & INP_NOHEADER) ? 1 : 0; 401 error = sockopt_set(sopt, &optval, sizeof(optval)); 402 } else if (op == PRCO_SETOPT) { 403 error = sockopt_getint(sopt, &optval); 404 if (error) 405 goto out; 406 if (optval) { 407 inp->inp_flags &= ~INP_HDRINCL; 408 inp->inp_flags |= INP_NOHEADER; 409 } else 410 inp->inp_flags &= ~INP_NOHEADER; 411 } 412 goto out; 413 } else if (sopt->sopt_level != IPPROTO_IP) 414 return ip_ctloutput(op, so, sopt); 415 416 switch (op) { 417 418 case PRCO_SETOPT: 419 switch (sopt->sopt_name) { 420 case IP_HDRINCL: 421 error = sockopt_getint(sopt, &optval); 422 if (error) 423 break; 424 if (optval) 425 inp->inp_flags |= INP_HDRINCL; 426 else 427 inp->inp_flags &= ~INP_HDRINCL; 428 break; 429 430 #ifdef MROUTING 431 case MRT_INIT: 432 case MRT_DONE: 433 case MRT_ADD_VIF: 434 case MRT_DEL_VIF: 435 case MRT_ADD_MFC: 436 case MRT_DEL_MFC: 437 case MRT_ASSERT: 438 case MRT_API_CONFIG: 439 case MRT_ADD_BW_UPCALL: 440 case MRT_DEL_BW_UPCALL: 441 error = ip_mrouter_set(so, sopt); 442 break; 443 #endif 444 445 default: 446 error = ip_ctloutput(op, so, sopt); 447 break; 448 } 449 break; 450 451 case PRCO_GETOPT: 452 switch (sopt->sopt_name) { 453 case IP_HDRINCL: 454 optval = inp->inp_flags & INP_HDRINCL; 455 error = sockopt_set(sopt, &optval, sizeof(optval)); 456 break; 457 458 #ifdef MROUTING 459 case MRT_VERSION: 460 case MRT_ASSERT: 461 case MRT_API_SUPPORT: 462 case MRT_API_CONFIG: 463 error = ip_mrouter_get(so, sopt); 464 break; 465 #endif 466 467 default: 468 error = ip_ctloutput(op, so, sopt); 469 break; 470 } 471 break; 472 } 473 out: 474 return error; 475 } 476 477 int 478 rip_connect_pcb(struct inpcb *inp, struct sockaddr_in *addr) 479 { 480 481 if (IFNET_READER_EMPTY()) 482 return (EADDRNOTAVAIL); 483 if (addr->sin_family != AF_INET) 484 return (EAFNOSUPPORT); 485 inp->inp_faddr = addr->sin_addr; 486 return (0); 487 } 488 489 static void 490 rip_disconnect1(struct inpcb *inp) 491 { 492 493 inp->inp_faddr = zeroin_addr; 494 } 495 496 static int 497 rip_attach(struct socket *so, int proto) 498 { 499 struct inpcb *inp; 500 int error; 501 502 KASSERT(sotoinpcb(so) == NULL); 503 sosetlock(so); 504 505 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 506 error = soreserve(so, rip_sendspace, rip_recvspace); 507 if (error) { 508 return error; 509 } 510 } 511 512 error = in_pcballoc(so, &rawcbtable); 513 if (error) { 514 return error; 515 } 516 inp = sotoinpcb(so); 517 inp->inp_ip.ip_p = proto; 518 KASSERT(solocked(so)); 519 520 return 0; 521 } 522 523 static void 524 rip_detach(struct socket *so) 525 { 526 struct inpcb *inp; 527 528 KASSERT(solocked(so)); 529 inp = sotoinpcb(so); 530 KASSERT(inp != NULL); 531 532 #ifdef MROUTING 533 extern struct socket *ip_mrouter; 534 if (so == ip_mrouter) { 535 ip_mrouter_done(); 536 } 537 #endif 538 in_pcbdetach(inp); 539 } 540 541 static int 542 rip_accept(struct socket *so, struct sockaddr *nam) 543 { 544 KASSERT(solocked(so)); 545 546 panic("rip_accept"); 547 548 return EOPNOTSUPP; 549 } 550 551 static int 552 rip_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 553 { 554 struct inpcb *inp = sotoinpcb(so); 555 struct sockaddr_in *addr = (struct sockaddr_in *)nam; 556 int error = 0; 557 int s, ss; 558 struct ifaddr *ifa; 559 560 KASSERT(solocked(so)); 561 KASSERT(inp != NULL); 562 KASSERT(nam != NULL); 563 564 if (addr->sin_len != sizeof(*addr)) 565 return EINVAL; 566 567 s = splsoftnet(); 568 if (IFNET_READER_EMPTY()) { 569 error = EADDRNOTAVAIL; 570 goto release; 571 } 572 if (addr->sin_family != AF_INET) { 573 error = EAFNOSUPPORT; 574 goto release; 575 } 576 ss = pserialize_read_enter(); 577 if ((ifa = ifa_ifwithaddr(sintosa(addr))) == NULL && 578 !in_nullhost(addr->sin_addr)) 579 { 580 pserialize_read_exit(ss); 581 error = EADDRNOTAVAIL; 582 goto release; 583 } 584 if (ifa && (ifatoia(ifa))->ia4_flags & 585 (IN6_IFF_NOTREADY | IN_IFF_DETACHED)) 586 { 587 pserialize_read_exit(ss); 588 error = EADDRNOTAVAIL; 589 goto release; 590 } 591 pserialize_read_exit(ss); 592 593 inp->inp_laddr = addr->sin_addr; 594 595 release: 596 splx(s); 597 return error; 598 } 599 600 static int 601 rip_listen(struct socket *so, struct lwp *l) 602 { 603 KASSERT(solocked(so)); 604 605 return EOPNOTSUPP; 606 } 607 608 static int 609 rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 610 { 611 struct inpcb *inp = sotoinpcb(so); 612 int error = 0; 613 int s; 614 615 KASSERT(solocked(so)); 616 KASSERT(inp != NULL); 617 KASSERT(nam != NULL); 618 619 s = splsoftnet(); 620 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 621 if (! error) 622 soisconnected(so); 623 splx(s); 624 625 return error; 626 } 627 628 static int 629 rip_connect2(struct socket *so, struct socket *so2) 630 { 631 KASSERT(solocked(so)); 632 633 return EOPNOTSUPP; 634 } 635 636 static int 637 rip_disconnect(struct socket *so) 638 { 639 struct inpcb *inp = sotoinpcb(so); 640 int s; 641 642 KASSERT(solocked(so)); 643 KASSERT(inp != NULL); 644 645 s = splsoftnet(); 646 soisdisconnected(so); 647 rip_disconnect1(inp); 648 splx(s); 649 650 return 0; 651 } 652 653 static int 654 rip_shutdown(struct socket *so) 655 { 656 int s; 657 658 KASSERT(solocked(so)); 659 660 /* 661 * Mark the connection as being incapable of further input. 662 */ 663 s = splsoftnet(); 664 socantsendmore(so); 665 splx(s); 666 667 return 0; 668 } 669 670 static int 671 rip_abort(struct socket *so) 672 { 673 KASSERT(solocked(so)); 674 675 panic("rip_abort"); 676 677 return EOPNOTSUPP; 678 } 679 680 static int 681 rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 682 { 683 return in_control(so, cmd, nam, ifp); 684 } 685 686 static int 687 rip_stat(struct socket *so, struct stat *ub) 688 { 689 KASSERT(solocked(so)); 690 691 /* stat: don't bother with a blocksize. */ 692 return 0; 693 } 694 695 static int 696 rip_peeraddr(struct socket *so, struct sockaddr *nam) 697 { 698 int s; 699 700 KASSERT(solocked(so)); 701 KASSERT(sotoinpcb(so) != NULL); 702 KASSERT(nam != NULL); 703 704 s = splsoftnet(); 705 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 706 splx(s); 707 708 return 0; 709 } 710 711 static int 712 rip_sockaddr(struct socket *so, struct sockaddr *nam) 713 { 714 int s; 715 716 KASSERT(solocked(so)); 717 KASSERT(sotoinpcb(so) != NULL); 718 KASSERT(nam != NULL); 719 720 s = splsoftnet(); 721 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 722 splx(s); 723 724 return 0; 725 } 726 727 static int 728 rip_rcvd(struct socket *so, int flags, struct lwp *l) 729 { 730 KASSERT(solocked(so)); 731 732 return EOPNOTSUPP; 733 } 734 735 static int 736 rip_recvoob(struct socket *so, struct mbuf *m, int flags) 737 { 738 KASSERT(solocked(so)); 739 740 return EOPNOTSUPP; 741 } 742 743 static int 744 rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 745 struct mbuf *control, struct lwp *l) 746 { 747 struct inpcb *inp = sotoinpcb(so); 748 int error = 0; 749 int s; 750 751 KASSERT(solocked(so)); 752 KASSERT(inp != NULL); 753 KASSERT(m != NULL); 754 755 /* 756 * Ship a packet out. The appropriate raw output 757 * routine handles any massaging necessary. 758 */ 759 if (control && control->m_len) { 760 m_freem(control); 761 m_freem(m); 762 return EINVAL; 763 } 764 765 s = splsoftnet(); 766 if (nam) { 767 if ((so->so_state & SS_ISCONNECTED) != 0) { 768 error = EISCONN; 769 goto die; 770 } 771 error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); 772 if (error) { 773 die: 774 m_freem(m); 775 splx(s); 776 return error; 777 } 778 } else { 779 if ((so->so_state & SS_ISCONNECTED) == 0) { 780 error = ENOTCONN; 781 goto die; 782 } 783 } 784 error = rip_output(m, inp); 785 if (nam) 786 rip_disconnect1(inp); 787 788 splx(s); 789 return error; 790 } 791 792 static int 793 rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 794 { 795 KASSERT(solocked(so)); 796 797 m_freem(m); 798 m_freem(control); 799 800 return EOPNOTSUPP; 801 } 802 803 static int 804 rip_purgeif(struct socket *so, struct ifnet *ifp) 805 { 806 int s; 807 808 s = splsoftnet(); 809 mutex_enter(softnet_lock); 810 in_pcbpurgeif0(&rawcbtable, ifp); 811 in_purgeif(ifp); 812 in_pcbpurgeif(&rawcbtable, ifp); 813 mutex_exit(softnet_lock); 814 splx(s); 815 816 return 0; 817 } 818 819 PR_WRAP_USRREQS(rip) 820 #define rip_attach rip_attach_wrapper 821 #define rip_detach rip_detach_wrapper 822 #define rip_accept rip_accept_wrapper 823 #define rip_bind rip_bind_wrapper 824 #define rip_listen rip_listen_wrapper 825 #define rip_connect rip_connect_wrapper 826 #define rip_connect2 rip_connect2_wrapper 827 #define rip_disconnect rip_disconnect_wrapper 828 #define rip_shutdown rip_shutdown_wrapper 829 #define rip_abort rip_abort_wrapper 830 #define rip_ioctl rip_ioctl_wrapper 831 #define rip_stat rip_stat_wrapper 832 #define rip_peeraddr rip_peeraddr_wrapper 833 #define rip_sockaddr rip_sockaddr_wrapper 834 #define rip_rcvd rip_rcvd_wrapper 835 #define rip_recvoob rip_recvoob_wrapper 836 #define rip_send rip_send_wrapper 837 #define rip_sendoob rip_sendoob_wrapper 838 #define rip_purgeif rip_purgeif_wrapper 839 840 const struct pr_usrreqs rip_usrreqs = { 841 .pr_attach = rip_attach, 842 .pr_detach = rip_detach, 843 .pr_accept = rip_accept, 844 .pr_bind = rip_bind, 845 .pr_listen = rip_listen, 846 .pr_connect = rip_connect, 847 .pr_connect2 = rip_connect2, 848 .pr_disconnect = rip_disconnect, 849 .pr_shutdown = rip_shutdown, 850 .pr_abort = rip_abort, 851 .pr_ioctl = rip_ioctl, 852 .pr_stat = rip_stat, 853 .pr_peeraddr = rip_peeraddr, 854 .pr_sockaddr = rip_sockaddr, 855 .pr_rcvd = rip_rcvd, 856 .pr_recvoob = rip_recvoob, 857 .pr_send = rip_send, 858 .pr_sendoob = rip_sendoob, 859 .pr_purgeif = rip_purgeif, 860 }; 861 862 static void 863 sysctl_net_inet_raw_setup(struct sysctllog **clog) 864 { 865 866 sysctl_createv(clog, 0, NULL, NULL, 867 CTLFLAG_PERMANENT, 868 CTLTYPE_NODE, "inet", NULL, 869 NULL, 0, NULL, 0, 870 CTL_NET, PF_INET, CTL_EOL); 871 sysctl_createv(clog, 0, NULL, NULL, 872 CTLFLAG_PERMANENT, 873 CTLTYPE_NODE, "raw", 874 SYSCTL_DESCR("Raw IPv4 settings"), 875 NULL, 0, NULL, 0, 876 CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); 877 878 sysctl_createv(clog, 0, NULL, NULL, 879 CTLFLAG_PERMANENT, 880 CTLTYPE_STRUCT, "pcblist", 881 SYSCTL_DESCR("Raw IPv4 control block list"), 882 sysctl_inpcblist, 0, &rawcbtable, 0, 883 CTL_NET, PF_INET, IPPROTO_RAW, 884 CTL_CREATE, CTL_EOL); 885 } 886
Indexes created Mon Sep 29 21:09:56 GMT 2025