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sys/netinet/in_pcb.c
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1 /*- 2 * Copyright (c) 1982, 1986, 1991, 1993, 1995 3 * The Regents of the University of California. 4 * Copyright (c) 2007 Robert N. M. Watson 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 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_ddb.h" 38 #include "opt_ipsec.h" 39 #include "opt_inet6.h" 40 #include "opt_mac.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/domain.h> 47 #include <sys/protosw.h> 48 #include <sys/socket.h> 49 #include <sys/socketvar.h> 50 #include <sys/priv.h> 51 #include <sys/proc.h> 52 #include <sys/jail.h> 53 #include <sys/kernel.h> 54 #include <sys/sysctl.h> 55 56 #ifdef DDB 57 #include <ddb/ddb.h> 58 #endif 59 60 #include <vm/uma.h> 61 62 #include <net/if.h> 63 #include <net/if_types.h> 64 #include <net/route.h> 65 66 #include <netinet/in.h> 67 #include <netinet/in_pcb.h> 68 #include <netinet/in_var.h> 69 #include <netinet/ip_var.h> 70 #include <netinet/tcp_var.h> 71 #include <netinet/udp.h> 72 #include <netinet/udp_var.h> 73 #ifdef INET6 74 #include <netinet/ip6.h> 75 #include <netinet6/ip6_var.h> 76 #endif /* INET6 */ 77 78 79 #ifdef IPSEC 80 #include <netipsec/ipsec.h> 81 #include <netipsec/key.h> 82 #endif /* IPSEC */ 83 84 #include <security/mac/mac_framework.h> 85 86 /* 87 * These configure the range of local port addresses assigned to 88 * "unspecified" outgoing connections/packets/whatever. 89 */ 90 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */ 91 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */ 92 int ipport_firstauto = IPPORT_HIFIRSTAUTO; /* 49152 */ 93 int ipport_lastauto = IPPORT_HILASTAUTO; /* 65535 */ 94 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */ 95 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */ 96 97 /* 98 * Reserved ports accessible only to root. There are significant 99 * security considerations that must be accounted for when changing these, 100 * but the security benefits can be great. Please be careful. 101 */ 102 int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */ 103 int ipport_reservedlow = 0; 104 105 /* Variables dealing with random ephemeral port allocation. */ 106 int ipport_randomized = 1; /* user controlled via sysctl */ 107 int ipport_randomcps = 10; /* user controlled via sysctl */ 108 int ipport_randomtime = 45; /* user controlled via sysctl */ 109 int ipport_stoprandom = 0; /* toggled by ipport_tick */ 110 int ipport_tcpallocs; 111 int ipport_tcplastcount; 112 113 #define RANGECHK(var, min, max) \ 114 if ((var) < (min)) { (var) = (min); } \ 115 else if ((var) > (max)) { (var) = (max); } 116 117 static int 118 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS) 119 { 120 int error; 121 122 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req); 123 if (error == 0) { 124 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1); 125 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1); 126 RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX); 127 RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX); 128 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX); 129 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX); 130 } 131 return (error); 132 } 133 134 #undef RANGECHK 135 136 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); 137 138 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW, 139 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", ""); 140 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW, 141 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", ""); 142 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW, 143 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", ""); 144 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW, 145 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", ""); 146 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW, 147 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", ""); 148 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW, 149 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", ""); 150 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh, 151 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, ""); 152 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow, 153 CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, ""); 154 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW, 155 &ipport_randomized, 0, "Enable random port allocation"); 156 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW, 157 &ipport_randomcps, 0, "Maximum number of random port " 158 "allocations before switching to a sequental one"); 159 SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW, 160 &ipport_randomtime, 0, "Minimum time to keep sequental port " 161 "allocation before switching to a random one"); 162 163 /* 164 * in_pcb.c: manage the Protocol Control Blocks. 165 * 166 * NOTE: It is assumed that most of these functions will be called with 167 * the pcbinfo lock held, and often, the inpcb lock held, as these utility 168 * functions often modify hash chains or addresses in pcbs. 169 */ 170 171 /* 172 * Allocate a PCB and associate it with the socket. 173 * On success return with the PCB locked. 174 */ 175 int 176 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo) 177 { 178 struct inpcb *inp; 179 int error; 180 181 INP_INFO_WLOCK_ASSERT(pcbinfo); 182 error = 0; 183 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT); 184 if (inp == NULL) 185 return (ENOBUFS); 186 bzero(inp, inp_zero_size); 187 inp->inp_pcbinfo = pcbinfo; 188 inp->inp_socket = so; 189 inp->inp_cred = crhold(so->so_cred); 190 inp->inp_inc.inc_fibnum = so->so_fibnum; 191 #ifdef MAC 192 error = mac_init_inpcb(inp, M_NOWAIT); 193 if (error != 0) 194 goto out; 195 SOCK_LOCK(so); 196 mac_create_inpcb_from_socket(so, inp); 197 SOCK_UNLOCK(so); 198 #endif 199 200 #ifdef IPSEC 201 error = ipsec_init_policy(so, &inp->inp_sp); 202 if (error != 0) { 203 #ifdef MAC 204 mac_destroy_inpcb(inp); 205 #endif 206 goto out; 207 } 208 #endif /*IPSEC*/ 209 #ifdef INET6 210 if (INP_SOCKAF(so) == AF_INET6) { 211 inp->inp_vflag |= INP_IPV6PROTO; 212 if (ip6_v6only) 213 inp->inp_flags |= IN6P_IPV6_V6ONLY; 214 } 215 #endif 216 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list); 217 pcbinfo->ipi_count++; 218 so->so_pcb = (caddr_t)inp; 219 #ifdef INET6 220 if (ip6_auto_flowlabel) 221 inp->inp_flags |= IN6P_AUTOFLOWLABEL; 222 #endif 223 INP_WLOCK(inp); 224 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 225 226 #if defined(IPSEC) || defined(MAC) 227 out: 228 if (error != 0) { 229 crfree(inp->inp_cred); 230 uma_zfree(pcbinfo->ipi_zone, inp); 231 } 232 #endif 233 return (error); 234 } 235 236 int 237 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 238 { 239 int anonport, error; 240 241 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 242 INP_WLOCK_ASSERT(inp); 243 244 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) 245 return (EINVAL); 246 anonport = inp->inp_lport == 0 && (nam == NULL || 247 ((struct sockaddr_in *)nam)->sin_port == 0); 248 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr, 249 &inp->inp_lport, cred); 250 if (error) 251 return (error); 252 if (in_pcbinshash(inp) != 0) { 253 inp->inp_laddr.s_addr = INADDR_ANY; 254 inp->inp_lport = 0; 255 return (EAGAIN); 256 } 257 if (anonport) 258 inp->inp_flags |= INP_ANONPORT; 259 return (0); 260 } 261 262 /* 263 * Set up a bind operation on a PCB, performing port allocation 264 * as required, but do not actually modify the PCB. Callers can 265 * either complete the bind by setting inp_laddr/inp_lport and 266 * calling in_pcbinshash(), or they can just use the resulting 267 * port and address to authorise the sending of a once-off packet. 268 * 269 * On error, the values of *laddrp and *lportp are not changed. 270 */ 271 int 272 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp, 273 u_short *lportp, struct ucred *cred) 274 { 275 struct socket *so = inp->inp_socket; 276 unsigned short *lastport; 277 struct sockaddr_in *sin; 278 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 279 struct in_addr laddr; 280 u_short lport = 0; 281 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 282 int error, prison = 0; 283 int dorandom; 284 285 /* 286 * Because no actual state changes occur here, a global write lock on 287 * the pcbinfo isn't required. 288 */ 289 INP_INFO_LOCK_ASSERT(pcbinfo); 290 INP_LOCK_ASSERT(inp); 291 292 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */ 293 return (EADDRNOTAVAIL); 294 laddr.s_addr = *laddrp; 295 if (nam != NULL && laddr.s_addr != INADDR_ANY) 296 return (EINVAL); 297 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 298 wild = INPLOOKUP_WILDCARD; 299 if (nam) { 300 sin = (struct sockaddr_in *)nam; 301 if (nam->sa_len != sizeof (*sin)) 302 return (EINVAL); 303 #ifdef notdef 304 /* 305 * We should check the family, but old programs 306 * incorrectly fail to initialize it. 307 */ 308 if (sin->sin_family != AF_INET) 309 return (EAFNOSUPPORT); 310 #endif 311 if (sin->sin_addr.s_addr != INADDR_ANY) 312 if (prison_ip(cred, 0, &sin->sin_addr.s_addr)) 313 return(EINVAL); 314 if (sin->sin_port != *lportp) { 315 /* Don't allow the port to change. */ 316 if (*lportp != 0) 317 return (EINVAL); 318 lport = sin->sin_port; 319 } 320 /* NB: lport is left as 0 if the port isn't being changed. */ 321 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 322 /* 323 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 324 * allow complete duplication of binding if 325 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 326 * and a multicast address is bound on both 327 * new and duplicated sockets. 328 */ 329 if (so->so_options & SO_REUSEADDR) 330 reuseport = SO_REUSEADDR|SO_REUSEPORT; 331 } else if (sin->sin_addr.s_addr != INADDR_ANY) { 332 sin->sin_port = 0; /* yech... */ 333 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 334 if (ifa_ifwithaddr((struct sockaddr *)sin) == 0) 335 return (EADDRNOTAVAIL); 336 } 337 laddr = sin->sin_addr; 338 if (lport) { 339 struct inpcb *t; 340 struct tcptw *tw; 341 342 /* GROSS */ 343 if (ntohs(lport) <= ipport_reservedhigh && 344 ntohs(lport) >= ipport_reservedlow && 345 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 346 0)) 347 return (EACCES); 348 if (jailed(cred)) 349 prison = 1; 350 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && 351 priv_check_cred(inp->inp_cred, 352 PRIV_NETINET_REUSEPORT, 0) != 0) { 353 t = in_pcblookup_local(pcbinfo, sin->sin_addr, 354 lport, prison ? 0 : INPLOOKUP_WILDCARD, 355 cred); 356 /* 357 * XXX 358 * This entire block sorely needs a rewrite. 359 */ 360 if (t && 361 ((t->inp_vflag & INP_TIMEWAIT) == 0) && 362 (so->so_type != SOCK_STREAM || 363 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) && 364 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY || 365 ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 366 (t->inp_socket->so_options & 367 SO_REUSEPORT) == 0) && 368 (inp->inp_cred->cr_uid != 369 t->inp_cred->cr_uid)) 370 return (EADDRINUSE); 371 } 372 if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr)) 373 return (EADDRNOTAVAIL); 374 t = in_pcblookup_local(pcbinfo, sin->sin_addr, 375 lport, prison ? 0 : wild, cred); 376 if (t && (t->inp_vflag & INP_TIMEWAIT)) { 377 /* 378 * XXXRW: If an incpb has had its timewait 379 * state recycled, we treat the address as 380 * being in use (for now). This is better 381 * than a panic, but not desirable. 382 */ 383 tw = intotw(inp); 384 if (tw == NULL || 385 (reuseport & tw->tw_so_options) == 0) 386 return (EADDRINUSE); 387 } else if (t && 388 (reuseport & t->inp_socket->so_options) == 0) { 389 #ifdef INET6 390 if (ntohl(sin->sin_addr.s_addr) != 391 INADDR_ANY || 392 ntohl(t->inp_laddr.s_addr) != 393 INADDR_ANY || 394 INP_SOCKAF(so) == 395 INP_SOCKAF(t->inp_socket)) 396 #endif 397 return (EADDRINUSE); 398 } 399 } 400 } 401 if (*lportp != 0) 402 lport = *lportp; 403 if (lport == 0) { 404 u_short first, last; 405 int count; 406 407 if (laddr.s_addr != INADDR_ANY) 408 if (prison_ip(cred, 0, &laddr.s_addr)) 409 return (EINVAL); 410 411 if (inp->inp_flags & INP_HIGHPORT) { 412 first = ipport_hifirstauto; /* sysctl */ 413 last = ipport_hilastauto; 414 lastport = &pcbinfo->ipi_lasthi; 415 } else if (inp->inp_flags & INP_LOWPORT) { 416 error = priv_check_cred(cred, 417 PRIV_NETINET_RESERVEDPORT, 0); 418 if (error) 419 return error; 420 first = ipport_lowfirstauto; /* 1023 */ 421 last = ipport_lowlastauto; /* 600 */ 422 lastport = &pcbinfo->ipi_lastlow; 423 } else { 424 first = ipport_firstauto; /* sysctl */ 425 last = ipport_lastauto; 426 lastport = &pcbinfo->ipi_lastport; 427 } 428 /* 429 * For UDP, use random port allocation as long as the user 430 * allows it. For TCP (and as of yet unknown) connections, 431 * use random port allocation only if the user allows it AND 432 * ipport_tick() allows it. 433 */ 434 if (ipport_randomized && 435 (!ipport_stoprandom || pcbinfo == &udbinfo)) 436 dorandom = 1; 437 else 438 dorandom = 0; 439 /* 440 * It makes no sense to do random port allocation if 441 * we have the only port available. 442 */ 443 if (first == last) 444 dorandom = 0; 445 /* Make sure to not include UDP packets in the count. */ 446 if (pcbinfo != &udbinfo) 447 ipport_tcpallocs++; 448 /* 449 * Simple check to ensure all ports are not used up causing 450 * a deadlock here. 451 * 452 * We split the two cases (up and down) so that the direction 453 * is not being tested on each round of the loop. 454 */ 455 if (first > last) { 456 /* 457 * counting down 458 */ 459 if (dorandom) 460 *lastport = first - 461 (arc4random() % (first - last)); 462 count = first - last; 463 464 do { 465 if (count-- < 0) /* completely used? */ 466 return (EADDRNOTAVAIL); 467 --*lastport; 468 if (*lastport > first || *lastport < last) 469 *lastport = first; 470 lport = htons(*lastport); 471 } while (in_pcblookup_local(pcbinfo, laddr, lport, 472 wild, cred)); 473 } else { 474 /* 475 * counting up 476 */ 477 if (dorandom) 478 *lastport = first + 479 (arc4random() % (last - first)); 480 count = last - first; 481 482 do { 483 if (count-- < 0) /* completely used? */ 484 return (EADDRNOTAVAIL); 485 ++*lastport; 486 if (*lastport < first || *lastport > last) 487 *lastport = first; 488 lport = htons(*lastport); 489 } while (in_pcblookup_local(pcbinfo, laddr, lport, 490 wild, cred)); 491 } 492 } 493 if (prison_ip(cred, 0, &laddr.s_addr)) 494 return (EINVAL); 495 *laddrp = laddr.s_addr; 496 *lportp = lport; 497 return (0); 498 } 499 500 /* 501 * Connect from a socket to a specified address. 502 * Both address and port must be specified in argument sin. 503 * If don't have a local address for this socket yet, 504 * then pick one. 505 */ 506 int 507 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 508 { 509 u_short lport, fport; 510 in_addr_t laddr, faddr; 511 int anonport, error; 512 513 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 514 INP_WLOCK_ASSERT(inp); 515 516 lport = inp->inp_lport; 517 laddr = inp->inp_laddr.s_addr; 518 anonport = (lport == 0); 519 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport, 520 NULL, cred); 521 if (error) 522 return (error); 523 524 /* Do the initial binding of the local address if required. */ 525 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) { 526 inp->inp_lport = lport; 527 inp->inp_laddr.s_addr = laddr; 528 if (in_pcbinshash(inp) != 0) { 529 inp->inp_laddr.s_addr = INADDR_ANY; 530 inp->inp_lport = 0; 531 return (EAGAIN); 532 } 533 } 534 535 /* Commit the remaining changes. */ 536 inp->inp_lport = lport; 537 inp->inp_laddr.s_addr = laddr; 538 inp->inp_faddr.s_addr = faddr; 539 inp->inp_fport = fport; 540 in_pcbrehash(inp); 541 542 if (anonport) 543 inp->inp_flags |= INP_ANONPORT; 544 return (0); 545 } 546 547 /* 548 * Set up for a connect from a socket to the specified address. 549 * On entry, *laddrp and *lportp should contain the current local 550 * address and port for the PCB; these are updated to the values 551 * that should be placed in inp_laddr and inp_lport to complete 552 * the connect. 553 * 554 * On success, *faddrp and *fportp will be set to the remote address 555 * and port. These are not updated in the error case. 556 * 557 * If the operation fails because the connection already exists, 558 * *oinpp will be set to the PCB of that connection so that the 559 * caller can decide to override it. In all other cases, *oinpp 560 * is set to NULL. 561 */ 562 int 563 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam, 564 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp, 565 struct inpcb **oinpp, struct ucred *cred) 566 { 567 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 568 struct in_ifaddr *ia; 569 struct sockaddr_in sa; 570 struct ucred *socred; 571 struct inpcb *oinp; 572 struct in_addr laddr, faddr; 573 u_short lport, fport; 574 int error; 575 576 /* 577 * Because a global state change doesn't actually occur here, a read 578 * lock is sufficient. 579 */ 580 INP_INFO_LOCK_ASSERT(inp->inp_pcbinfo); 581 INP_LOCK_ASSERT(inp); 582 583 if (oinpp != NULL) 584 *oinpp = NULL; 585 if (nam->sa_len != sizeof (*sin)) 586 return (EINVAL); 587 if (sin->sin_family != AF_INET) 588 return (EAFNOSUPPORT); 589 if (sin->sin_port == 0) 590 return (EADDRNOTAVAIL); 591 laddr.s_addr = *laddrp; 592 lport = *lportp; 593 faddr = sin->sin_addr; 594 fport = sin->sin_port; 595 socred = inp->inp_socket->so_cred; 596 if (laddr.s_addr == INADDR_ANY && jailed(socred)) { 597 bzero(&sa, sizeof(sa)); 598 sa.sin_addr.s_addr = htonl(prison_getip(socred)); 599 sa.sin_len = sizeof(sa); 600 sa.sin_family = AF_INET; 601 error = in_pcbbind_setup(inp, (struct sockaddr *)&sa, 602 &laddr.s_addr, &lport, cred); 603 if (error) 604 return (error); 605 } 606 if (!TAILQ_EMPTY(&in_ifaddrhead)) { 607 /* 608 * If the destination address is INADDR_ANY, 609 * use the primary local address. 610 * If the supplied address is INADDR_BROADCAST, 611 * and the primary interface supports broadcast, 612 * choose the broadcast address for that interface. 613 */ 614 if (faddr.s_addr == INADDR_ANY) 615 faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr; 616 else if (faddr.s_addr == (u_long)INADDR_BROADCAST && 617 (TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags & 618 IFF_BROADCAST)) 619 faddr = satosin(&TAILQ_FIRST( 620 &in_ifaddrhead)->ia_broadaddr)->sin_addr; 621 } 622 if (laddr.s_addr == INADDR_ANY) { 623 ia = NULL; 624 /* 625 * If route is known our src addr is taken from the i/f, 626 * else punt. 627 * 628 * Find out route to destination 629 */ 630 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0) 631 ia = ip_rtaddr(faddr, inp->inp_inc.inc_fibnum); 632 /* 633 * If we found a route, use the address corresponding to 634 * the outgoing interface. 635 * 636 * Otherwise assume faddr is reachable on a directly connected 637 * network and try to find a corresponding interface to take 638 * the source address from. 639 */ 640 if (ia == NULL) { 641 bzero(&sa, sizeof(sa)); 642 sa.sin_addr = faddr; 643 sa.sin_len = sizeof(sa); 644 sa.sin_family = AF_INET; 645 646 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa))); 647 if (ia == NULL) 648 ia = ifatoia(ifa_ifwithnet(sintosa(&sa))); 649 if (ia == NULL) 650 return (ENETUNREACH); 651 } 652 /* 653 * If the destination address is multicast and an outgoing 654 * interface has been set as a multicast option, use the 655 * address of that interface as our source address. 656 */ 657 if (IN_MULTICAST(ntohl(faddr.s_addr)) && 658 inp->inp_moptions != NULL) { 659 struct ip_moptions *imo; 660 struct ifnet *ifp; 661 662 imo = inp->inp_moptions; 663 if (imo->imo_multicast_ifp != NULL) { 664 ifp = imo->imo_multicast_ifp; 665 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) 666 if (ia->ia_ifp == ifp) 667 break; 668 if (ia == NULL) 669 return (EADDRNOTAVAIL); 670 } 671 } 672 laddr = ia->ia_addr.sin_addr; 673 } 674 675 oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport, 676 0, NULL); 677 if (oinp != NULL) { 678 if (oinpp != NULL) 679 *oinpp = oinp; 680 return (EADDRINUSE); 681 } 682 if (lport == 0) { 683 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport, 684 cred); 685 if (error) 686 return (error); 687 } 688 *laddrp = laddr.s_addr; 689 *lportp = lport; 690 *faddrp = faddr.s_addr; 691 *fportp = fport; 692 return (0); 693 } 694 695 void 696 in_pcbdisconnect(struct inpcb *inp) 697 { 698 699 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 700 INP_WLOCK_ASSERT(inp); 701 702 inp->inp_faddr.s_addr = INADDR_ANY; 703 inp->inp_fport = 0; 704 in_pcbrehash(inp); 705 } 706 707 /* 708 * Historically, in_pcbdetach() included the functionality now found in 709 * in_pcbfree() and in_pcbdrop(). They are now broken out to reflect the 710 * more complex life cycle of TCP. 711 * 712 * in_pcbdetach() is responsibe for disconnecting the socket from an inpcb. 713 * For most protocols, this will be invoked immediately prior to calling 714 * in_pcbfree(). However, for TCP the inpcb may significantly outlive the 715 * socket, in which case in_pcbfree() may be deferred. 716 */ 717 void 718 in_pcbdetach(struct inpcb *inp) 719 { 720 721 KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL")); 722 723 inp->inp_socket->so_pcb = NULL; 724 inp->inp_socket = NULL; 725 } 726 727 /* 728 * in_pcbfree() is responsible for freeing an already-detached inpcb, as well 729 * as removing it from any global inpcb lists it might be on. 730 */ 731 void 732 in_pcbfree(struct inpcb *inp) 733 { 734 struct inpcbinfo *ipi = inp->inp_pcbinfo; 735 736 KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL")); 737 738 INP_INFO_WLOCK_ASSERT(ipi); 739 INP_WLOCK_ASSERT(inp); 740 741 #ifdef IPSEC 742 ipsec4_delete_pcbpolicy(inp); 743 #endif /*IPSEC*/ 744 inp->inp_gencnt = ++ipi->ipi_gencnt; 745 in_pcbremlists(inp); 746 if (inp->inp_options) 747 (void)m_free(inp->inp_options); 748 if (inp->inp_moptions != NULL) 749 inp_freemoptions(inp->inp_moptions); 750 inp->inp_vflag = 0; 751 crfree(inp->inp_cred); 752 753 #ifdef MAC 754 mac_destroy_inpcb(inp); 755 #endif 756 INP_WUNLOCK(inp); 757 uma_zfree(ipi->ipi_zone, inp); 758 } 759 760 /* 761 * in_pcbdrop() removes an inpcb from hashed lists, releasing its address and 762 * port reservation, and preventing it from being returned by inpcb lookups. 763 * 764 * It is used by TCP to mark an inpcb as unused and avoid future packet 765 * delivery or event notification when a socket remains open but TCP has 766 * closed. This might occur as a result of a shutdown()-initiated TCP close 767 * or a RST on the wire, and allows the port binding to be reused while still 768 * maintaining the invariant that so_pcb always points to a valid inpcb until 769 * in_pcbdetach(). 770 * 771 * XXXRW: An inp_lport of 0 is used to indicate that the inpcb is not on hash 772 * lists, but can lead to confusing netstat output, as open sockets with 773 * closed TCP connections will no longer appear to have their bound port 774 * number. An explicit flag would be better, as it would allow us to leave 775 * the port number intact after the connection is dropped. 776 * 777 * XXXRW: Possibly in_pcbdrop() should also prevent future notifications by 778 * in_pcbnotifyall() and in_pcbpurgeif0()? 779 */ 780 void 781 in_pcbdrop(struct inpcb *inp) 782 { 783 784 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 785 INP_WLOCK_ASSERT(inp); 786 787 inp->inp_vflag |= INP_DROPPED; 788 if (inp->inp_lport) { 789 struct inpcbport *phd = inp->inp_phd; 790 791 LIST_REMOVE(inp, inp_hash); 792 LIST_REMOVE(inp, inp_portlist); 793 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 794 LIST_REMOVE(phd, phd_hash); 795 free(phd, M_PCB); 796 } 797 inp->inp_lport = 0; 798 } 799 } 800 801 /* 802 * Common routines to return the socket addresses associated with inpcbs. 803 */ 804 struct sockaddr * 805 in_sockaddr(in_port_t port, struct in_addr *addr_p) 806 { 807 struct sockaddr_in *sin; 808 809 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME, 810 M_WAITOK | M_ZERO); 811 sin->sin_family = AF_INET; 812 sin->sin_len = sizeof(*sin); 813 sin->sin_addr = *addr_p; 814 sin->sin_port = port; 815 816 return (struct sockaddr *)sin; 817 } 818 819 int 820 in_getsockaddr(struct socket *so, struct sockaddr **nam) 821 { 822 struct inpcb *inp; 823 struct in_addr addr; 824 in_port_t port; 825 826 inp = sotoinpcb(so); 827 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL")); 828 829 INP_RLOCK(inp); 830 port = inp->inp_lport; 831 addr = inp->inp_laddr; 832 INP_RUNLOCK(inp); 833 834 *nam = in_sockaddr(port, &addr); 835 return 0; 836 } 837 838 int 839 in_getpeeraddr(struct socket *so, struct sockaddr **nam) 840 { 841 struct inpcb *inp; 842 struct in_addr addr; 843 in_port_t port; 844 845 inp = sotoinpcb(so); 846 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL")); 847 848 INP_RLOCK(inp); 849 port = inp->inp_fport; 850 addr = inp->inp_faddr; 851 INP_RUNLOCK(inp); 852 853 *nam = in_sockaddr(port, &addr); 854 return 0; 855 } 856 857 void 858 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno, 859 struct inpcb *(*notify)(struct inpcb *, int)) 860 { 861 struct inpcb *inp, *inp_temp; 862 863 INP_INFO_WLOCK(pcbinfo); 864 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 865 INP_WLOCK(inp); 866 #ifdef INET6 867 if ((inp->inp_vflag & INP_IPV4) == 0) { 868 INP_WUNLOCK(inp); 869 continue; 870 } 871 #endif 872 if (inp->inp_faddr.s_addr != faddr.s_addr || 873 inp->inp_socket == NULL) { 874 INP_WUNLOCK(inp); 875 continue; 876 } 877 if ((*notify)(inp, errno)) 878 INP_WUNLOCK(inp); 879 } 880 INP_INFO_WUNLOCK(pcbinfo); 881 } 882 883 void 884 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 885 { 886 struct inpcb *inp; 887 struct ip_moptions *imo; 888 int i, gap; 889 890 INP_INFO_RLOCK(pcbinfo); 891 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 892 INP_WLOCK(inp); 893 imo = inp->inp_moptions; 894 if ((inp->inp_vflag & INP_IPV4) && 895 imo != NULL) { 896 /* 897 * Unselect the outgoing interface if it is being 898 * detached. 899 */ 900 if (imo->imo_multicast_ifp == ifp) 901 imo->imo_multicast_ifp = NULL; 902 903 /* 904 * Drop multicast group membership if we joined 905 * through the interface being detached. 906 */ 907 for (i = 0, gap = 0; i < imo->imo_num_memberships; 908 i++) { 909 if (imo->imo_membership[i]->inm_ifp == ifp) { 910 in_delmulti(imo->imo_membership[i]); 911 gap++; 912 } else if (gap != 0) 913 imo->imo_membership[i - gap] = 914 imo->imo_membership[i]; 915 } 916 imo->imo_num_memberships -= gap; 917 } 918 INP_WUNLOCK(inp); 919 } 920 INP_INFO_RUNLOCK(pcbinfo); 921 } 922 923 /* 924 * Lookup a PCB based on the local address and port. 925 */ 926 #define INP_LOOKUP_MAPPED_PCB_COST 3 927 struct inpcb * 928 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr, 929 u_short lport, int wild_okay, struct ucred *cred) 930 { 931 struct inpcb *inp; 932 #ifdef INET6 933 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST; 934 #else 935 int matchwild = 3; 936 #endif 937 int wildcard; 938 939 INP_INFO_LOCK_ASSERT(pcbinfo); 940 941 if (!wild_okay) { 942 struct inpcbhead *head; 943 /* 944 * Look for an unconnected (wildcard foreign addr) PCB that 945 * matches the local address and port we're looking for. 946 */ 947 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 948 0, pcbinfo->ipi_hashmask)]; 949 LIST_FOREACH(inp, head, inp_hash) { 950 #ifdef INET6 951 if ((inp->inp_vflag & INP_IPV4) == 0) 952 continue; 953 #endif 954 if (inp->inp_faddr.s_addr == INADDR_ANY && 955 inp->inp_laddr.s_addr == laddr.s_addr && 956 inp->inp_lport == lport) { 957 /* 958 * Found. 959 */ 960 return (inp); 961 } 962 } 963 /* 964 * Not found. 965 */ 966 return (NULL); 967 } else { 968 struct inpcbporthead *porthash; 969 struct inpcbport *phd; 970 struct inpcb *match = NULL; 971 /* 972 * Best fit PCB lookup. 973 * 974 * First see if this local port is in use by looking on the 975 * port hash list. 976 */ 977 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 978 pcbinfo->ipi_porthashmask)]; 979 LIST_FOREACH(phd, porthash, phd_hash) { 980 if (phd->phd_port == lport) 981 break; 982 } 983 if (phd != NULL) { 984 /* 985 * Port is in use by one or more PCBs. Look for best 986 * fit. 987 */ 988 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 989 wildcard = 0; 990 #ifdef INET6 991 if ((inp->inp_vflag & INP_IPV4) == 0) 992 continue; 993 /* 994 * We never select the PCB that has 995 * INP_IPV6 flag and is bound to :: if 996 * we have another PCB which is bound 997 * to 0.0.0.0. If a PCB has the 998 * INP_IPV6 flag, then we set its cost 999 * higher than IPv4 only PCBs. 1000 * 1001 * Note that the case only happens 1002 * when a socket is bound to ::, under 1003 * the condition that the use of the 1004 * mapped address is allowed. 1005 */ 1006 if ((inp->inp_vflag & INP_IPV6) != 0) 1007 wildcard += INP_LOOKUP_MAPPED_PCB_COST; 1008 #endif 1009 if (inp->inp_faddr.s_addr != INADDR_ANY) 1010 wildcard++; 1011 if (inp->inp_laddr.s_addr != INADDR_ANY) { 1012 if (laddr.s_addr == INADDR_ANY) 1013 wildcard++; 1014 else if (inp->inp_laddr.s_addr != laddr.s_addr) 1015 continue; 1016 } else { 1017 if (laddr.s_addr != INADDR_ANY) 1018 wildcard++; 1019 } 1020 if (wildcard < matchwild) { 1021 match = inp; 1022 matchwild = wildcard; 1023 if (matchwild == 0) { 1024 break; 1025 } 1026 } 1027 } 1028 } 1029 return (match); 1030 } 1031 } 1032 #undef INP_LOOKUP_MAPPED_PCB_COST 1033 1034 /* 1035 * Lookup PCB in hash list. 1036 */ 1037 struct inpcb * 1038 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, 1039 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard, 1040 struct ifnet *ifp) 1041 { 1042 struct inpcbhead *head; 1043 struct inpcb *inp; 1044 u_short fport = fport_arg, lport = lport_arg; 1045 1046 INP_INFO_LOCK_ASSERT(pcbinfo); 1047 1048 /* 1049 * First look for an exact match. 1050 */ 1051 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, 1052 pcbinfo->ipi_hashmask)]; 1053 LIST_FOREACH(inp, head, inp_hash) { 1054 #ifdef INET6 1055 if ((inp->inp_vflag & INP_IPV4) == 0) 1056 continue; 1057 #endif 1058 if (inp->inp_faddr.s_addr == faddr.s_addr && 1059 inp->inp_laddr.s_addr == laddr.s_addr && 1060 inp->inp_fport == fport && 1061 inp->inp_lport == lport) 1062 return (inp); 1063 } 1064 1065 /* 1066 * Then look for a wildcard match, if requested. 1067 */ 1068 if (wildcard) { 1069 struct inpcb *local_wild = NULL; 1070 #ifdef INET6 1071 struct inpcb *local_wild_mapped = NULL; 1072 #endif 1073 1074 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 1075 0, pcbinfo->ipi_hashmask)]; 1076 LIST_FOREACH(inp, head, inp_hash) { 1077 #ifdef INET6 1078 if ((inp->inp_vflag & INP_IPV4) == 0) 1079 continue; 1080 #endif 1081 if (inp->inp_faddr.s_addr == INADDR_ANY && 1082 inp->inp_lport == lport) { 1083 if (ifp && ifp->if_type == IFT_FAITH && 1084 (inp->inp_flags & INP_FAITH) == 0) 1085 continue; 1086 if (inp->inp_laddr.s_addr == laddr.s_addr) 1087 return (inp); 1088 else if (inp->inp_laddr.s_addr == INADDR_ANY) { 1089 #ifdef INET6 1090 if (INP_CHECK_SOCKAF(inp->inp_socket, 1091 AF_INET6)) 1092 local_wild_mapped = inp; 1093 else 1094 #endif 1095 local_wild = inp; 1096 } 1097 } 1098 } 1099 #ifdef INET6 1100 if (local_wild == NULL) 1101 return (local_wild_mapped); 1102 #endif 1103 return (local_wild); 1104 } 1105 return (NULL); 1106 } 1107 1108 /* 1109 * Insert PCB onto various hash lists. 1110 */ 1111 int 1112 in_pcbinshash(struct inpcb *inp) 1113 { 1114 struct inpcbhead *pcbhash; 1115 struct inpcbporthead *pcbporthash; 1116 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1117 struct inpcbport *phd; 1118 u_int32_t hashkey_faddr; 1119 1120 INP_INFO_WLOCK_ASSERT(pcbinfo); 1121 INP_WLOCK_ASSERT(inp); 1122 1123 #ifdef INET6 1124 if (inp->inp_vflag & INP_IPV6) 1125 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */; 1126 else 1127 #endif /* INET6 */ 1128 hashkey_faddr = inp->inp_faddr.s_addr; 1129 1130 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr, 1131 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)]; 1132 1133 pcbporthash = &pcbinfo->ipi_porthashbase[ 1134 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)]; 1135 1136 /* 1137 * Go through port list and look for a head for this lport. 1138 */ 1139 LIST_FOREACH(phd, pcbporthash, phd_hash) { 1140 if (phd->phd_port == inp->inp_lport) 1141 break; 1142 } 1143 /* 1144 * If none exists, malloc one and tack it on. 1145 */ 1146 if (phd == NULL) { 1147 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), M_PCB, M_NOWAIT); 1148 if (phd == NULL) { 1149 return (ENOBUFS); /* XXX */ 1150 } 1151 phd->phd_port = inp->inp_lport; 1152 LIST_INIT(&phd->phd_pcblist); 1153 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash); 1154 } 1155 inp->inp_phd = phd; 1156 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist); 1157 LIST_INSERT_HEAD(pcbhash, inp, inp_hash); 1158 return (0); 1159 } 1160 1161 /* 1162 * Move PCB to the proper hash bucket when { faddr, fport } have been 1163 * changed. NOTE: This does not handle the case of the lport changing (the 1164 * hashed port list would have to be updated as well), so the lport must 1165 * not change after in_pcbinshash() has been called. 1166 */ 1167 void 1168 in_pcbrehash(struct inpcb *inp) 1169 { 1170 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1171 struct inpcbhead *head; 1172 u_int32_t hashkey_faddr; 1173 1174 INP_INFO_WLOCK_ASSERT(pcbinfo); 1175 INP_WLOCK_ASSERT(inp); 1176 1177 #ifdef INET6 1178 if (inp->inp_vflag & INP_IPV6) 1179 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */; 1180 else 1181 #endif /* INET6 */ 1182 hashkey_faddr = inp->inp_faddr.s_addr; 1183 1184 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr, 1185 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)]; 1186 1187 LIST_REMOVE(inp, inp_hash); 1188 LIST_INSERT_HEAD(head, inp, inp_hash); 1189 } 1190 1191 /* 1192 * Remove PCB from various lists. 1193 */ 1194 void 1195 in_pcbremlists(struct inpcb *inp) 1196 { 1197 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1198 1199 INP_INFO_WLOCK_ASSERT(pcbinfo); 1200 INP_WLOCK_ASSERT(inp); 1201 1202 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 1203 if (inp->inp_lport) { 1204 struct inpcbport *phd = inp->inp_phd; 1205 1206 LIST_REMOVE(inp, inp_hash); 1207 LIST_REMOVE(inp, inp_portlist); 1208 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1209 LIST_REMOVE(phd, phd_hash); 1210 free(phd, M_PCB); 1211 } 1212 } 1213 LIST_REMOVE(inp, inp_list); 1214 pcbinfo->ipi_count--; 1215 } 1216 1217 /* 1218 * A set label operation has occurred at the socket layer, propagate the 1219 * label change into the in_pcb for the socket. 1220 */ 1221 void 1222 in_pcbsosetlabel(struct socket *so) 1223 { 1224 #ifdef MAC 1225 struct inpcb *inp; 1226 1227 inp = sotoinpcb(so); 1228 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL")); 1229 1230 INP_WLOCK(inp); 1231 SOCK_LOCK(so); 1232 mac_inpcb_sosetlabel(so, inp); 1233 SOCK_UNLOCK(so); 1234 INP_WUNLOCK(inp); 1235 #endif 1236 } 1237 1238 /* 1239 * ipport_tick runs once per second, determining if random port allocation 1240 * should be continued. If more than ipport_randomcps ports have been 1241 * allocated in the last second, then we return to sequential port 1242 * allocation. We return to random allocation only once we drop below 1243 * ipport_randomcps for at least ipport_randomtime seconds. 1244 */ 1245 void 1246 ipport_tick(void *xtp) 1247 { 1248 1249 if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) { 1250 if (ipport_stoprandom > 0) 1251 ipport_stoprandom--; 1252 } else 1253 ipport_stoprandom = ipport_randomtime; 1254 ipport_tcplastcount = ipport_tcpallocs; 1255 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL); 1256 } 1257 1258 void 1259 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg) 1260 { 1261 struct inpcb *inp; 1262 1263 INP_INFO_RLOCK(&tcbinfo); 1264 LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) { 1265 INP_WLOCK(inp); 1266 func(inp, arg); 1267 INP_WUNLOCK(inp); 1268 } 1269 INP_INFO_RUNLOCK(&tcbinfo); 1270 } 1271 1272 struct socket * 1273 inp_inpcbtosocket(struct inpcb *inp) 1274 { 1275 1276 INP_WLOCK_ASSERT(inp); 1277 return (inp->inp_socket); 1278 } 1279 1280 struct tcpcb * 1281 inp_inpcbtotcpcb(struct inpcb *inp) 1282 { 1283 1284 INP_WLOCK_ASSERT(inp); 1285 return ((struct tcpcb *)inp->inp_ppcb); 1286 } 1287 1288 int 1289 inp_ip_tos_get(const struct inpcb *inp) 1290 { 1291 1292 return (inp->inp_ip_tos); 1293 } 1294 1295 void 1296 inp_ip_tos_set(struct inpcb *inp, int val) 1297 { 1298 1299 inp->inp_ip_tos = val; 1300 } 1301 1302 void 1303 inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp, 1304 uint32_t *faddr, uint16_t *fp) 1305 { 1306 1307 INP_LOCK_ASSERT(inp); 1308 *laddr = inp->inp_laddr.s_addr; 1309 *faddr = inp->inp_faddr.s_addr; 1310 *lp = inp->inp_lport; 1311 *fp = inp->inp_fport; 1312 } 1313 1314 struct inpcb * 1315 so_sotoinpcb(struct socket *so) 1316 { 1317 1318 return (sotoinpcb(so)); 1319 } 1320 1321 struct tcpcb * 1322 so_sototcpcb(struct socket *so) 1323 { 1324 1325 return (sototcpcb(so)); 1326 } 1327 1328 void 1329 inp_wlock(struct inpcb *inp) 1330 { 1331 1332 INP_WLOCK(inp); 1333 } 1334 1335 void 1336 inp_wunlock(struct inpcb *inp) 1337 { 1338 1339 INP_WUNLOCK(inp); 1340 } 1341 1342 void 1343 inp_rlock(struct inpcb *inp) 1344 { 1345 1346 INP_RLOCK(inp); 1347 } 1348 1349 void 1350 inp_runlock(struct inpcb *inp) 1351 { 1352 1353 INP_RUNLOCK(inp); 1354 } 1355 1356 #ifdef INVARIANTS 1357 void 1358 inp_wlock_assert(struct inpcb *inp) 1359 { 1360 1361 INP_WLOCK_ASSERT(inp); 1362 } 1363 1364 void 1365 inp_rlock_assert(struct inpcb *inp) 1366 { 1367 1368 INP_RLOCK_ASSERT(inp); 1369 } 1370 1371 void 1372 inp_lock_assert(struct inpcb *inp) 1373 { 1374 1375 INP_LOCK_ASSERT(inp); 1376 } 1377 1378 void 1379 inp_unlock_assert(struct inpcb *inp) 1380 { 1381 1382 INP_UNLOCK_ASSERT(inp); 1383 } 1384 1385 #endif 1386 1387 #ifdef DDB 1388 static void 1389 db_print_indent(int indent) 1390 { 1391 int i; 1392 1393 for (i = 0; i < indent; i++) 1394 db_printf(" "); 1395 } 1396 1397 static void 1398 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent) 1399 { 1400 char faddr_str[48], laddr_str[48]; 1401 1402 db_print_indent(indent); 1403 db_printf("%s at %p\n", name, inc); 1404 1405 indent += 2; 1406 1407 #ifdef INET6 1408 if (inc->inc_flags == 1) { 1409 /* IPv6. */ 1410 ip6_sprintf(laddr_str, &inc->inc6_laddr); 1411 ip6_sprintf(faddr_str, &inc->inc6_faddr); 1412 } else { 1413 #endif 1414 /* IPv4. */ 1415 inet_ntoa_r(inc->inc_laddr, laddr_str); 1416 inet_ntoa_r(inc->inc_faddr, faddr_str); 1417 #ifdef INET6 1418 } 1419 #endif 1420 db_print_indent(indent); 1421 db_printf("inc_laddr %s inc_lport %u\n", laddr_str, 1422 ntohs(inc->inc_lport)); 1423 db_print_indent(indent); 1424 db_printf("inc_faddr %s inc_fport %u\n", faddr_str, 1425 ntohs(inc->inc_fport)); 1426 } 1427 1428 static void 1429 db_print_inpflags(int inp_flags) 1430 { 1431 int comma; 1432 1433 comma = 0; 1434 if (inp_flags & INP_RECVOPTS) { 1435 db_printf("%sINP_RECVOPTS", comma ? ", " : ""); 1436 comma = 1; 1437 } 1438 if (inp_flags & INP_RECVRETOPTS) { 1439 db_printf("%sINP_RECVRETOPTS", comma ? ", " : ""); 1440 comma = 1; 1441 } 1442 if (inp_flags & INP_RECVDSTADDR) { 1443 db_printf("%sINP_RECVDSTADDR", comma ? ", " : ""); 1444 comma = 1; 1445 } 1446 if (inp_flags & INP_HDRINCL) { 1447 db_printf("%sINP_HDRINCL", comma ? ", " : ""); 1448 comma = 1; 1449 } 1450 if (inp_flags & INP_HIGHPORT) { 1451 db_printf("%sINP_HIGHPORT", comma ? ", " : ""); 1452 comma = 1; 1453 } 1454 if (inp_flags & INP_LOWPORT) { 1455 db_printf("%sINP_LOWPORT", comma ? ", " : ""); 1456 comma = 1; 1457 } 1458 if (inp_flags & INP_ANONPORT) { 1459 db_printf("%sINP_ANONPORT", comma ? ", " : ""); 1460 comma = 1; 1461 } 1462 if (inp_flags & INP_RECVIF) { 1463 db_printf("%sINP_RECVIF", comma ? ", " : ""); 1464 comma = 1; 1465 } 1466 if (inp_flags & INP_MTUDISC) { 1467 db_printf("%sINP_MTUDISC", comma ? ", " : ""); 1468 comma = 1; 1469 } 1470 if (inp_flags & INP_FAITH) { 1471 db_printf("%sINP_FAITH", comma ? ", " : ""); 1472 comma = 1; 1473 } 1474 if (inp_flags & INP_RECVTTL) { 1475 db_printf("%sINP_RECVTTL", comma ? ", " : ""); 1476 comma = 1; 1477 } 1478 if (inp_flags & INP_DONTFRAG) { 1479 db_printf("%sINP_DONTFRAG", comma ? ", " : ""); 1480 comma = 1; 1481 } 1482 if (inp_flags & IN6P_IPV6_V6ONLY) { 1483 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : ""); 1484 comma = 1; 1485 } 1486 if (inp_flags & IN6P_PKTINFO) { 1487 db_printf("%sIN6P_PKTINFO", comma ? ", " : ""); 1488 comma = 1; 1489 } 1490 if (inp_flags & IN6P_HOPLIMIT) { 1491 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : ""); 1492 comma = 1; 1493 } 1494 if (inp_flags & IN6P_HOPOPTS) { 1495 db_printf("%sIN6P_HOPOPTS", comma ? ", " : ""); 1496 comma = 1; 1497 } 1498 if (inp_flags & IN6P_DSTOPTS) { 1499 db_printf("%sIN6P_DSTOPTS", comma ? ", " : ""); 1500 comma = 1; 1501 } 1502 if (inp_flags & IN6P_RTHDR) { 1503 db_printf("%sIN6P_RTHDR", comma ? ", " : ""); 1504 comma = 1; 1505 } 1506 if (inp_flags & IN6P_RTHDRDSTOPTS) { 1507 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : ""); 1508 comma = 1; 1509 } 1510 if (inp_flags & IN6P_TCLASS) { 1511 db_printf("%sIN6P_TCLASS", comma ? ", " : ""); 1512 comma = 1; 1513 } 1514 if (inp_flags & IN6P_AUTOFLOWLABEL) { 1515 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : ""); 1516 comma = 1; 1517 } 1518 if (inp_flags & IN6P_RFC2292) { 1519 db_printf("%sIN6P_RFC2292", comma ? ", " : ""); 1520 comma = 1; 1521 } 1522 if (inp_flags & IN6P_MTU) { 1523 db_printf("IN6P_MTU%s", comma ? ", " : ""); 1524 comma = 1; 1525 } 1526 } 1527 1528 static void 1529 db_print_inpvflag(u_char inp_vflag) 1530 { 1531 int comma; 1532 1533 comma = 0; 1534 if (inp_vflag & INP_IPV4) { 1535 db_printf("%sINP_IPV4", comma ? ", " : ""); 1536 comma = 1; 1537 } 1538 if (inp_vflag & INP_IPV6) { 1539 db_printf("%sINP_IPV6", comma ? ", " : ""); 1540 comma = 1; 1541 } 1542 if (inp_vflag & INP_IPV6PROTO) { 1543 db_printf("%sINP_IPV6PROTO", comma ? ", " : ""); 1544 comma = 1; 1545 } 1546 if (inp_vflag & INP_TIMEWAIT) { 1547 db_printf("%sINP_TIMEWAIT", comma ? ", " : ""); 1548 comma = 1; 1549 } 1550 if (inp_vflag & INP_ONESBCAST) { 1551 db_printf("%sINP_ONESBCAST", comma ? ", " : ""); 1552 comma = 1; 1553 } 1554 if (inp_vflag & INP_DROPPED) { 1555 db_printf("%sINP_DROPPED", comma ? ", " : ""); 1556 comma = 1; 1557 } 1558 if (inp_vflag & INP_SOCKREF) { 1559 db_printf("%sINP_SOCKREF", comma ? ", " : ""); 1560 comma = 1; 1561 } 1562 } 1563 1564 void 1565 db_print_inpcb(struct inpcb *inp, const char *name, int indent) 1566 { 1567 1568 db_print_indent(indent); 1569 db_printf("%s at %p\n", name, inp); 1570 1571 indent += 2; 1572 1573 db_print_indent(indent); 1574 db_printf("inp_flow: 0x%x\n", inp->inp_flow); 1575 1576 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent); 1577 1578 db_print_indent(indent); 1579 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n", 1580 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket); 1581 1582 db_print_indent(indent); 1583 db_printf("inp_label: %p inp_flags: 0x%x (", 1584 inp->inp_label, inp->inp_flags); 1585 db_print_inpflags(inp->inp_flags); 1586 db_printf(")\n"); 1587 1588 db_print_indent(indent); 1589 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp, 1590 inp->inp_vflag); 1591 db_print_inpvflag(inp->inp_vflag); 1592 db_printf(")\n"); 1593 1594 db_print_indent(indent); 1595 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n", 1596 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl); 1597 1598 db_print_indent(indent); 1599 #ifdef INET6 1600 if (inp->inp_vflag & INP_IPV6) { 1601 db_printf("in6p_options: %p in6p_outputopts: %p " 1602 "in6p_moptions: %p\n", inp->in6p_options, 1603 inp->in6p_outputopts, inp->in6p_moptions); 1604 db_printf("in6p_icmp6filt: %p in6p_cksum %d " 1605 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum, 1606 inp->in6p_hops); 1607 } else 1608 #endif 1609 { 1610 db_printf("inp_ip_tos: %d inp_ip_options: %p " 1611 "inp_ip_moptions: %p\n", inp->inp_ip_tos, 1612 inp->inp_options, inp->inp_moptions); 1613 } 1614 1615 db_print_indent(indent); 1616 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd, 1617 (uintmax_t)inp->inp_gencnt); 1618 } 1619 1620 DB_SHOW_COMMAND(inpcb, db_show_inpcb) 1621 { 1622 struct inpcb *inp; 1623 1624 if (!have_addr) { 1625 db_printf("usage: show inpcb <addr>\n"); 1626 return; 1627 } 1628 inp = (struct inpcb *)addr; 1629 1630 db_print_inpcb(inp, "inpcb", 0); 1631 } 1632 #endif
Cache object: 23187f0b834d6d502d8d352d53839907
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