Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/netipsec/keysock.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $FreeBSD$ */ 2 /* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */ 3 4 /*- 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include "opt_ipsec.h" 34 35 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */ 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/domain.h> 40 #include <sys/errno.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/mutex.h> 46 #include <sys/priv.h> 47 #include <sys/protosw.h> 48 #include <sys/signalvar.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/sysctl.h> 52 #include <sys/systm.h> 53 54 #include <net/raw_cb.h> 55 #include <net/route.h> 56 57 #include <net/pfkeyv2.h> 58 #include <netipsec/key.h> 59 #include <netipsec/keysock.h> 60 #include <netipsec/key_debug.h> 61 62 #include <machine/stdarg.h> 63 64 struct key_cb { 65 int key_count; 66 int any_count; 67 }; 68 static struct key_cb key_cb; 69 70 static struct sockaddr key_dst = { 2, PF_KEY, }; 71 static struct sockaddr key_src = { 2, PF_KEY, }; 72 73 static int key_sendup0 __P((struct rawcb *, struct mbuf *, int)); 74 75 struct pfkeystat pfkeystat; 76 77 /* 78 * key_output() 79 */ 80 int 81 key_output(struct mbuf *m, struct socket *so) 82 { 83 struct sadb_msg *msg; 84 int len, error = 0; 85 86 if (m == 0) 87 panic("%s: NULL pointer was passed.\n", __func__); 88 89 pfkeystat.out_total++; 90 pfkeystat.out_bytes += m->m_pkthdr.len; 91 92 len = m->m_pkthdr.len; 93 if (len < sizeof(struct sadb_msg)) { 94 pfkeystat.out_tooshort++; 95 error = EINVAL; 96 goto end; 97 } 98 99 if (m->m_len < sizeof(struct sadb_msg)) { 100 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) { 101 pfkeystat.out_nomem++; 102 error = ENOBUFS; 103 goto end; 104 } 105 } 106 107 M_ASSERTPKTHDR(m); 108 109 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m)); 110 111 msg = mtod(m, struct sadb_msg *); 112 pfkeystat.out_msgtype[msg->sadb_msg_type]++; 113 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) { 114 pfkeystat.out_invlen++; 115 error = EINVAL; 116 goto end; 117 } 118 119 error = key_parse(m, so); 120 m = NULL; 121 end: 122 if (m) 123 m_freem(m); 124 return error; 125 } 126 127 /* 128 * send message to the socket. 129 */ 130 static int 131 key_sendup0(rp, m, promisc) 132 struct rawcb *rp; 133 struct mbuf *m; 134 int promisc; 135 { 136 int error; 137 138 if (promisc) { 139 struct sadb_msg *pmsg; 140 141 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT); 142 if (m && m->m_len < sizeof(struct sadb_msg)) 143 m = m_pullup(m, sizeof(struct sadb_msg)); 144 if (!m) { 145 pfkeystat.in_nomem++; 146 m_freem(m); 147 return ENOBUFS; 148 } 149 m->m_pkthdr.len += sizeof(*pmsg); 150 151 pmsg = mtod(m, struct sadb_msg *); 152 bzero(pmsg, sizeof(*pmsg)); 153 pmsg->sadb_msg_version = PF_KEY_V2; 154 pmsg->sadb_msg_type = SADB_X_PROMISC; 155 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 156 /* pid and seq? */ 157 158 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++; 159 } 160 161 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src, 162 m, NULL)) { 163 pfkeystat.in_nomem++; 164 m_freem(m); 165 error = ENOBUFS; 166 } else 167 error = 0; 168 sorwakeup(rp->rcb_socket); 169 return error; 170 } 171 172 /* XXX this interface should be obsoleted. */ 173 int 174 key_sendup(so, msg, len, target) 175 struct socket *so; 176 struct sadb_msg *msg; 177 u_int len; 178 int target; /*target of the resulting message*/ 179 { 180 struct mbuf *m, *n, *mprev; 181 int tlen; 182 183 /* sanity check */ 184 if (so == 0 || msg == 0) 185 panic("%s: NULL pointer was passed.\n", __func__); 186 187 KEYDEBUG(KEYDEBUG_KEY_DUMP, 188 printf("%s: \n", __func__); 189 kdebug_sadb(msg)); 190 191 /* 192 * we increment statistics here, just in case we have ENOBUFS 193 * in this function. 194 */ 195 pfkeystat.in_total++; 196 pfkeystat.in_bytes += len; 197 pfkeystat.in_msgtype[msg->sadb_msg_type]++; 198 199 /* 200 * Get mbuf chain whenever possible (not clusters), 201 * to save socket buffer. We'll be generating many SADB_ACQUIRE 202 * messages to listening key sockets. If we simply allocate clusters, 203 * sbappendaddr() will raise ENOBUFS due to too little sbspace(). 204 * sbspace() computes # of actual data bytes AND mbuf region. 205 * 206 * TODO: SADB_ACQUIRE filters should be implemented. 207 */ 208 tlen = len; 209 m = mprev = NULL; 210 while (tlen > 0) { 211 if (tlen == len) { 212 MGETHDR(n, M_DONTWAIT, MT_DATA); 213 if (n == NULL) { 214 pfkeystat.in_nomem++; 215 return ENOBUFS; 216 } 217 n->m_len = MHLEN; 218 } else { 219 MGET(n, M_DONTWAIT, MT_DATA); 220 if (n == NULL) { 221 pfkeystat.in_nomem++; 222 return ENOBUFS; 223 } 224 n->m_len = MLEN; 225 } 226 if (tlen >= MCLBYTES) { /*XXX better threshold? */ 227 MCLGET(n, M_DONTWAIT); 228 if ((n->m_flags & M_EXT) == 0) { 229 m_free(n); 230 m_freem(m); 231 pfkeystat.in_nomem++; 232 return ENOBUFS; 233 } 234 n->m_len = MCLBYTES; 235 } 236 237 if (tlen < n->m_len) 238 n->m_len = tlen; 239 n->m_next = NULL; 240 if (m == NULL) 241 m = mprev = n; 242 else { 243 mprev->m_next = n; 244 mprev = n; 245 } 246 tlen -= n->m_len; 247 n = NULL; 248 } 249 m->m_pkthdr.len = len; 250 m->m_pkthdr.rcvif = NULL; 251 m_copyback(m, 0, len, (caddr_t)msg); 252 253 /* avoid duplicated statistics */ 254 pfkeystat.in_total--; 255 pfkeystat.in_bytes -= len; 256 pfkeystat.in_msgtype[msg->sadb_msg_type]--; 257 258 return key_sendup_mbuf(so, m, target); 259 } 260 261 /* so can be NULL if target != KEY_SENDUP_ONE */ 262 int 263 key_sendup_mbuf(so, m, target) 264 struct socket *so; 265 struct mbuf *m; 266 int target; 267 { 268 struct mbuf *n; 269 struct keycb *kp; 270 int sendup; 271 struct rawcb *rp; 272 int error = 0; 273 274 if (m == NULL) 275 panic("key_sendup_mbuf: NULL pointer was passed.\n"); 276 if (so == NULL && target == KEY_SENDUP_ONE) 277 panic("%s: NULL pointer was passed.\n", __func__); 278 279 pfkeystat.in_total++; 280 pfkeystat.in_bytes += m->m_pkthdr.len; 281 if (m->m_len < sizeof(struct sadb_msg)) { 282 m = m_pullup(m, sizeof(struct sadb_msg)); 283 if (m == NULL) { 284 pfkeystat.in_nomem++; 285 return ENOBUFS; 286 } 287 } 288 if (m->m_len >= sizeof(struct sadb_msg)) { 289 struct sadb_msg *msg; 290 msg = mtod(m, struct sadb_msg *); 291 pfkeystat.in_msgtype[msg->sadb_msg_type]++; 292 } 293 mtx_lock(&rawcb_mtx); 294 LIST_FOREACH(rp, &rawcb_list, list) 295 { 296 if (rp->rcb_proto.sp_family != PF_KEY) 297 continue; 298 if (rp->rcb_proto.sp_protocol 299 && rp->rcb_proto.sp_protocol != PF_KEY_V2) { 300 continue; 301 } 302 303 kp = (struct keycb *)rp; 304 305 /* 306 * If you are in promiscuous mode, and when you get broadcasted 307 * reply, you'll get two PF_KEY messages. 308 * (based on pf_key@inner.net message on 14 Oct 1998) 309 */ 310 if (((struct keycb *)rp)->kp_promisc) { 311 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 312 (void)key_sendup0(rp, n, 1); 313 n = NULL; 314 } 315 } 316 317 /* the exact target will be processed later */ 318 if (so && sotorawcb(so) == rp) 319 continue; 320 321 sendup = 0; 322 switch (target) { 323 case KEY_SENDUP_ONE: 324 /* the statement has no effect */ 325 if (so && sotorawcb(so) == rp) 326 sendup++; 327 break; 328 case KEY_SENDUP_ALL: 329 sendup++; 330 break; 331 case KEY_SENDUP_REGISTERED: 332 if (kp->kp_registered) 333 sendup++; 334 break; 335 } 336 pfkeystat.in_msgtarget[target]++; 337 338 if (!sendup) 339 continue; 340 341 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) { 342 m_freem(m); 343 pfkeystat.in_nomem++; 344 mtx_unlock(&rawcb_mtx); 345 return ENOBUFS; 346 } 347 348 if ((error = key_sendup0(rp, n, 0)) != 0) { 349 m_freem(m); 350 mtx_unlock(&rawcb_mtx); 351 return error; 352 } 353 354 n = NULL; 355 } 356 357 if (so) { 358 error = key_sendup0(sotorawcb(so), m, 0); 359 m = NULL; 360 } else { 361 error = 0; 362 m_freem(m); 363 } 364 mtx_unlock(&rawcb_mtx); 365 return error; 366 } 367 368 /* 369 * key_abort() 370 * derived from net/rtsock.c:rts_abort() 371 */ 372 static void 373 key_abort(struct socket *so) 374 { 375 raw_usrreqs.pru_abort(so); 376 } 377 378 /* 379 * key_attach() 380 * derived from net/rtsock.c:rts_attach() 381 */ 382 static int 383 key_attach(struct socket *so, int proto, struct thread *td) 384 { 385 struct keycb *kp; 386 int error; 387 388 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL")); 389 390 if (td != NULL) { 391 error = priv_check(td, PRIV_NET_RAW); 392 if (error) 393 return error; 394 } 395 396 /* XXX */ 397 MALLOC(kp, struct keycb *, sizeof *kp, M_PCB, M_WAITOK | M_ZERO); 398 if (kp == 0) 399 return ENOBUFS; 400 401 so->so_pcb = (caddr_t)kp; 402 error = raw_attach(so, proto); 403 kp = (struct keycb *)sotorawcb(so); 404 if (error) { 405 free(kp, M_PCB); 406 so->so_pcb = (caddr_t) 0; 407 return error; 408 } 409 410 kp->kp_promisc = kp->kp_registered = 0; 411 412 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */ 413 key_cb.key_count++; 414 key_cb.any_count++; 415 kp->kp_raw.rcb_laddr = &key_src; 416 kp->kp_raw.rcb_faddr = &key_dst; 417 soisconnected(so); 418 so->so_options |= SO_USELOOPBACK; 419 420 return 0; 421 } 422 423 /* 424 * key_bind() 425 * derived from net/rtsock.c:rts_bind() 426 */ 427 static int 428 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 429 { 430 return EINVAL; 431 } 432 433 /* 434 * key_close() 435 * derived from net/rtsock.c:rts_close(). 436 */ 437 static void 438 key_close(struct socket *so) 439 { 440 441 raw_usrreqs.pru_close(so); 442 } 443 444 /* 445 * key_connect() 446 * derived from net/rtsock.c:rts_connect() 447 */ 448 static int 449 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 450 { 451 return EINVAL; 452 } 453 454 /* 455 * key_detach() 456 * derived from net/rtsock.c:rts_detach() 457 */ 458 static void 459 key_detach(struct socket *so) 460 { 461 struct keycb *kp = (struct keycb *)sotorawcb(so); 462 463 KASSERT(kp != NULL, ("key_detach: kp == NULL")); 464 if (kp->kp_raw.rcb_proto.sp_protocol 465 == PF_KEY) /* XXX: AF_KEY */ 466 key_cb.key_count--; 467 key_cb.any_count--; 468 469 key_freereg(so); 470 raw_usrreqs.pru_detach(so); 471 } 472 473 /* 474 * key_disconnect() 475 * derived from net/rtsock.c:key_disconnect() 476 */ 477 static int 478 key_disconnect(struct socket *so) 479 { 480 return(raw_usrreqs.pru_disconnect(so)); 481 } 482 483 /* 484 * key_peeraddr() 485 * derived from net/rtsock.c:rts_peeraddr() 486 */ 487 static int 488 key_peeraddr(struct socket *so, struct sockaddr **nam) 489 { 490 return(raw_usrreqs.pru_peeraddr(so, nam)); 491 } 492 493 /* 494 * key_send() 495 * derived from net/rtsock.c:rts_send() 496 */ 497 static int 498 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 499 struct mbuf *control, struct thread *td) 500 { 501 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 502 } 503 504 /* 505 * key_shutdown() 506 * derived from net/rtsock.c:rts_shutdown() 507 */ 508 static int 509 key_shutdown(struct socket *so) 510 { 511 return(raw_usrreqs.pru_shutdown(so)); 512 } 513 514 /* 515 * key_sockaddr() 516 * derived from net/rtsock.c:rts_sockaddr() 517 */ 518 static int 519 key_sockaddr(struct socket *so, struct sockaddr **nam) 520 { 521 return(raw_usrreqs.pru_sockaddr(so, nam)); 522 } 523 524 struct pr_usrreqs key_usrreqs = { 525 .pru_abort = key_abort, 526 .pru_attach = key_attach, 527 .pru_bind = key_bind, 528 .pru_connect = key_connect, 529 .pru_detach = key_detach, 530 .pru_disconnect = key_disconnect, 531 .pru_peeraddr = key_peeraddr, 532 .pru_send = key_send, 533 .pru_shutdown = key_shutdown, 534 .pru_sockaddr = key_sockaddr, 535 .pru_close = key_close, 536 }; 537 538 /* sysctl */ 539 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family"); 540 541 /* 542 * Definitions of protocols supported in the KEY domain. 543 */ 544 545 extern struct domain keydomain; 546 547 struct protosw keysw[] = { 548 { 549 .pr_type = SOCK_RAW, 550 .pr_domain = &keydomain, 551 .pr_protocol = PF_KEY_V2, 552 .pr_flags = PR_ATOMIC|PR_ADDR, 553 .pr_output = key_output, 554 .pr_ctlinput = raw_ctlinput, 555 .pr_init = raw_init, 556 .pr_usrreqs = &key_usrreqs 557 } 558 }; 559 560 static void 561 key_init0(void) 562 { 563 bzero((caddr_t)&key_cb, sizeof(key_cb)); 564 key_init(); 565 } 566 567 struct domain keydomain = { 568 .dom_family = PF_KEY, 569 .dom_name = "key", 570 .dom_init = key_init0, 571 .dom_protosw = keysw, 572 .dom_protoswNPROTOSW = &keysw[sizeof(keysw)/sizeof(keysw[0])] 573 }; 574 575 DOMAIN_SET(key);
Cache object: 70dc7899b28e0baf1746d4b56479cf39
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]