| 1 | /* $NetBSD: raw_ip.c,v 1.161 2016/09/29 12:19:47 roy 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 1.161 2016/09/29 12:19:47 roy 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 & IN6_IFF_DUPLICATED) { |
| 585 | pserialize_read_exit(ss); |
| 586 | error = EADDRNOTAVAIL; |
| 587 | goto release; |
| 588 | } |
| 589 | pserialize_read_exit(ss); |
| 590 | |
| 591 | inp->inp_laddr = addr->sin_addr; |
| 592 | |
| 593 | release: |
| 594 | splx(s); |
| 595 | return error; |
| 596 | } |
| 597 | |
| 598 | static int |
| 599 | rip_listen(struct socket *so, struct lwp *l) |
| 600 | { |
| 601 | KASSERT(solocked(so)); |
| 602 | |
| 603 | return EOPNOTSUPP; |
| 604 | } |
| 605 | |
| 606 | static int |
| 607 | rip_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) |
| 608 | { |
| 609 | struct inpcb *inp = sotoinpcb(so); |
| 610 | int error = 0; |
| 611 | int s; |
| 612 | |
| 613 | KASSERT(solocked(so)); |
| 614 | KASSERT(inp != NULL); |
| 615 | KASSERT(nam != NULL); |
| 616 | |
| 617 | s = splsoftnet(); |
| 618 | error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); |
| 619 | if (! error) |
| 620 | soisconnected(so); |
| 621 | splx(s); |
| 622 | |
| 623 | return error; |
| 624 | } |
| 625 | |
| 626 | static int |
| 627 | rip_connect2(struct socket *so, struct socket *so2) |
| 628 | { |
| 629 | KASSERT(solocked(so)); |
| 630 | |
| 631 | return EOPNOTSUPP; |
| 632 | } |
| 633 | |
| 634 | static int |
| 635 | rip_disconnect(struct socket *so) |
| 636 | { |
| 637 | struct inpcb *inp = sotoinpcb(so); |
| 638 | int s; |
| 639 | |
| 640 | KASSERT(solocked(so)); |
| 641 | KASSERT(inp != NULL); |
| 642 | |
| 643 | s = splsoftnet(); |
| 644 | soisdisconnected(so); |
| 645 | rip_disconnect1(inp); |
| 646 | splx(s); |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | static int |
| 652 | rip_shutdown(struct socket *so) |
| 653 | { |
| 654 | int s; |
| 655 | |
| 656 | KASSERT(solocked(so)); |
| 657 | |
| 658 | /* |
| 659 | * Mark the connection as being incapable of further input. |
| 660 | */ |
| 661 | s = splsoftnet(); |
| 662 | socantsendmore(so); |
| 663 | splx(s); |
| 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static int |
| 669 | rip_abort(struct socket *so) |
| 670 | { |
| 671 | KASSERT(solocked(so)); |
| 672 | |
| 673 | panic("rip_abort" ); |
| 674 | |
| 675 | return EOPNOTSUPP; |
| 676 | } |
| 677 | |
| 678 | static int |
| 679 | rip_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) |
| 680 | { |
| 681 | return in_control(so, cmd, nam, ifp); |
| 682 | } |
| 683 | |
| 684 | static int |
| 685 | rip_stat(struct socket *so, struct stat *ub) |
| 686 | { |
| 687 | KASSERT(solocked(so)); |
| 688 | |
| 689 | /* stat: don't bother with a blocksize. */ |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | static int |
| 694 | rip_peeraddr(struct socket *so, struct sockaddr *nam) |
| 695 | { |
| 696 | int s; |
| 697 | |
| 698 | KASSERT(solocked(so)); |
| 699 | KASSERT(sotoinpcb(so) != NULL); |
| 700 | KASSERT(nam != NULL); |
| 701 | |
| 702 | s = splsoftnet(); |
| 703 | in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); |
| 704 | splx(s); |
| 705 | |
| 706 | return 0; |
| 707 | } |
| 708 | |
| 709 | static int |
| 710 | rip_sockaddr(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_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); |
| 720 | splx(s); |
| 721 | |
| 722 | return 0; |
| 723 | } |
| 724 | |
| 725 | static int |
| 726 | rip_rcvd(struct socket *so, int flags, struct lwp *l) |
| 727 | { |
| 728 | KASSERT(solocked(so)); |
| 729 | |
| 730 | return EOPNOTSUPP; |
| 731 | } |
| 732 | |
| 733 | static int |
| 734 | rip_recvoob(struct socket *so, struct mbuf *m, int flags) |
| 735 | { |
| 736 | KASSERT(solocked(so)); |
| 737 | |
| 738 | return EOPNOTSUPP; |
| 739 | } |
| 740 | |
| 741 | static int |
| 742 | rip_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, |
| 743 | struct mbuf *control, struct lwp *l) |
| 744 | { |
| 745 | struct inpcb *inp = sotoinpcb(so); |
| 746 | int error = 0; |
| 747 | int s; |
| 748 | |
| 749 | KASSERT(solocked(so)); |
| 750 | KASSERT(inp != NULL); |
| 751 | KASSERT(m != NULL); |
| 752 | |
| 753 | /* |
| 754 | * Ship a packet out. The appropriate raw output |
| 755 | * routine handles any massaging necessary. |
| 756 | */ |
| 757 | if (control && control->m_len) { |
| 758 | m_freem(control); |
| 759 | m_freem(m); |
| 760 | return EINVAL; |
| 761 | } |
| 762 | |
| 763 | s = splsoftnet(); |
| 764 | if (nam) { |
| 765 | if ((so->so_state & SS_ISCONNECTED) != 0) { |
| 766 | error = EISCONN; |
| 767 | goto die; |
| 768 | } |
| 769 | error = rip_connect_pcb(inp, (struct sockaddr_in *)nam); |
| 770 | if (error) { |
| 771 | die: |
| 772 | m_freem(m); |
| 773 | splx(s); |
| 774 | return error; |
| 775 | } |
| 776 | } else { |
| 777 | if ((so->so_state & SS_ISCONNECTED) == 0) { |
| 778 | error = ENOTCONN; |
| 779 | goto die; |
| 780 | } |
| 781 | } |
| 782 | error = rip_output(m, inp); |
| 783 | if (nam) |
| 784 | rip_disconnect1(inp); |
| 785 | |
| 786 | splx(s); |
| 787 | return error; |
| 788 | } |
| 789 | |
| 790 | static int |
| 791 | rip_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) |
| 792 | { |
| 793 | KASSERT(solocked(so)); |
| 794 | |
| 795 | m_freem(m); |
| 796 | m_freem(control); |
| 797 | |
| 798 | return EOPNOTSUPP; |
| 799 | } |
| 800 | |
| 801 | static int |
| 802 | rip_purgeif(struct socket *so, struct ifnet *ifp) |
| 803 | { |
| 804 | int s; |
| 805 | |
| 806 | s = splsoftnet(); |
| 807 | mutex_enter(softnet_lock); |
| 808 | in_pcbpurgeif0(&rawcbtable, ifp); |
| 809 | in_purgeif(ifp); |
| 810 | in_pcbpurgeif(&rawcbtable, ifp); |
| 811 | mutex_exit(softnet_lock); |
| 812 | splx(s); |
| 813 | |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | PR_WRAP_USRREQS(rip) |
| 818 | #define rip_attach rip_attach_wrapper |
| 819 | #define rip_detach rip_detach_wrapper |
| 820 | #define rip_accept rip_accept_wrapper |
| 821 | #define rip_bind rip_bind_wrapper |
| 822 | #define rip_listen rip_listen_wrapper |
| 823 | #define rip_connect rip_connect_wrapper |
| 824 | #define rip_connect2 rip_connect2_wrapper |
| 825 | #define rip_disconnect rip_disconnect_wrapper |
| 826 | #define rip_shutdown rip_shutdown_wrapper |
| 827 | #define rip_abort rip_abort_wrapper |
| 828 | #define rip_ioctl rip_ioctl_wrapper |
| 829 | #define rip_stat rip_stat_wrapper |
| 830 | #define rip_peeraddr rip_peeraddr_wrapper |
| 831 | #define rip_sockaddr rip_sockaddr_wrapper |
| 832 | #define rip_rcvd rip_rcvd_wrapper |
| 833 | #define rip_recvoob rip_recvoob_wrapper |
| 834 | #define rip_send rip_send_wrapper |
| 835 | #define rip_sendoob rip_sendoob_wrapper |
| 836 | #define rip_purgeif rip_purgeif_wrapper |
| 837 | |
| 838 | const struct pr_usrreqs rip_usrreqs = { |
| 839 | .pr_attach = rip_attach, |
| 840 | .pr_detach = rip_detach, |
| 841 | .pr_accept = rip_accept, |
| 842 | .pr_bind = rip_bind, |
| 843 | .pr_listen = rip_listen, |
| 844 | .pr_connect = rip_connect, |
| 845 | .pr_connect2 = rip_connect2, |
| 846 | .pr_disconnect = rip_disconnect, |
| 847 | .pr_shutdown = rip_shutdown, |
| 848 | .pr_abort = rip_abort, |
| 849 | .pr_ioctl = rip_ioctl, |
| 850 | .pr_stat = rip_stat, |
| 851 | .pr_peeraddr = rip_peeraddr, |
| 852 | .pr_sockaddr = rip_sockaddr, |
| 853 | .pr_rcvd = rip_rcvd, |
| 854 | .pr_recvoob = rip_recvoob, |
| 855 | .pr_send = rip_send, |
| 856 | .pr_sendoob = rip_sendoob, |
| 857 | .pr_purgeif = rip_purgeif, |
| 858 | }; |
| 859 | |
| 860 | static void |
| 861 | sysctl_net_inet_raw_setup(struct sysctllog **clog) |
| 862 | { |
| 863 | |
| 864 | sysctl_createv(clog, 0, NULL, NULL, |
| 865 | CTLFLAG_PERMANENT, |
| 866 | CTLTYPE_NODE, "inet" , NULL, |
| 867 | NULL, 0, NULL, 0, |
| 868 | CTL_NET, PF_INET, CTL_EOL); |
| 869 | sysctl_createv(clog, 0, NULL, NULL, |
| 870 | CTLFLAG_PERMANENT, |
| 871 | CTLTYPE_NODE, "raw" , |
| 872 | SYSCTL_DESCR("Raw IPv4 settings" ), |
| 873 | NULL, 0, NULL, 0, |
| 874 | CTL_NET, PF_INET, IPPROTO_RAW, CTL_EOL); |
| 875 | |
| 876 | sysctl_createv(clog, 0, NULL, NULL, |
| 877 | CTLFLAG_PERMANENT, |
| 878 | CTLTYPE_STRUCT, "pcblist" , |
| 879 | SYSCTL_DESCR("Raw IPv4 control block list" ), |
| 880 | sysctl_inpcblist, 0, &rawcbtable, 0, |
| 881 | CTL_NET, PF_INET, IPPROTO_RAW, |
| 882 | CTL_CREATE, CTL_EOL); |
| 883 | } |
| 884 | |