1 /*- 2 * Copyright (c) 1982, 1986, 1991, 1993, 1995 3 * The Regents of the University of California. 4 * Copyright (c) 2007-2009 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 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/domain.h> 46 #include <sys/protosw.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/priv.h> 50 #include <sys/proc.h> 51 #include <sys/jail.h> 52 #include <sys/kernel.h> 53 #include <sys/sysctl.h> 54 55 #ifdef DDB 56 #include <ddb/ddb.h> 57 #endif 58 59 #include <vm/uma.h> 60 61 #include <net/if.h> 62 #include <net/if_types.h> 63 #include <net/route.h> 64 #include <net/vnet.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 VNET_DEFINE(int, ipport_lowfirstauto) = IPPORT_RESERVED - 1; /* 1023 */ 91 VNET_DEFINE(int, ipport_lowlastauto) = IPPORT_RESERVEDSTART; /* 600 */ 92 VNET_DEFINE(int, ipport_firstauto) = IPPORT_EPHEMERALFIRST; /* 10000 */ 93 VNET_DEFINE(int, ipport_lastauto) = IPPORT_EPHEMERALLAST; /* 65535 */ 94 VNET_DEFINE(int, ipport_hifirstauto) = IPPORT_HIFIRSTAUTO; /* 49152 */ 95 VNET_DEFINE(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 VNET_DEFINE(int, ipport_reservedhigh) = IPPORT_RESERVED - 1; /* 1023 */ 103 VNET_DEFINE(int, ipport_reservedlow); 104 105 /* Variables dealing with random ephemeral port allocation. */ 106 VNET_DEFINE(int, ipport_randomized) = 1; /* user controlled via sysctl */ 107 VNET_DEFINE(int, ipport_randomcps) = 10; /* user controlled via sysctl */ 108 VNET_DEFINE(int, ipport_randomtime) = 45; /* user controlled via sysctl */ 109 VNET_DEFINE(int, ipport_stoprandom); /* toggled by ipport_tick */ 110 VNET_DEFINE(int, ipport_tcpallocs); 111 static VNET_DEFINE(int, ipport_tcplastcount); 112 113 #define V_ipport_tcplastcount VNET(ipport_tcplastcount) 114 115 #define RANGECHK(var, min, max) \ 116 if ((var) < (min)) { (var) = (min); } \ 117 else if ((var) > (max)) { (var) = (max); } 118 119 static void in_pcbremlists(struct inpcb *inp); 120 121 static int 122 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS) 123 { 124 int error; 125 126 #ifdef VIMAGE 127 error = vnet_sysctl_handle_int(oidp, arg1, arg2, req); 128 #else 129 error = sysctl_handle_int(oidp, arg1, arg2, req); 130 #endif 131 if (error == 0) { 132 RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1); 133 RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1); 134 RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX); 135 RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX); 136 RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX); 137 RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX); 138 } 139 return (error); 140 } 141 142 #undef RANGECHK 143 144 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); 145 146 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, 147 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lowfirstauto), 0, 148 &sysctl_net_ipport_check, "I", ""); 149 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, 150 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lowlastauto), 0, 151 &sysctl_net_ipport_check, "I", ""); 152 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, first, 153 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_firstauto), 0, 154 &sysctl_net_ipport_check, "I", ""); 155 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, last, 156 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_lastauto), 0, 157 &sysctl_net_ipport_check, "I", ""); 158 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, 159 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_hifirstauto), 0, 160 &sysctl_net_ipport_check, "I", ""); 161 SYSCTL_VNET_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, 162 CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ipport_hilastauto), 0, 163 &sysctl_net_ipport_check, "I", ""); 164 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh, 165 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedhigh), 0, ""); 166 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow, 167 CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedlow), 0, ""); 168 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW, 169 &VNET_NAME(ipport_randomized), 0, "Enable random port allocation"); 170 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW, 171 &VNET_NAME(ipport_randomcps), 0, "Maximum number of random port " 172 "allocations before switching to a sequental one"); 173 SYSCTL_VNET_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW, 174 &VNET_NAME(ipport_randomtime), 0, 175 "Minimum time to keep sequental port " 176 "allocation before switching to a random one"); 177 178 /* 179 * in_pcb.c: manage the Protocol Control Blocks. 180 * 181 * NOTE: It is assumed that most of these functions will be called with 182 * the pcbinfo lock held, and often, the inpcb lock held, as these utility 183 * functions often modify hash chains or addresses in pcbs. 184 */ 185 186 /* 187 * Allocate a PCB and associate it with the socket. 188 * On success return with the PCB locked. 189 */ 190 int 191 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo) 192 { 193 struct inpcb *inp; 194 int error; 195 196 INP_INFO_WLOCK_ASSERT(pcbinfo); 197 error = 0; 198 inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT); 199 if (inp == NULL) 200 return (ENOBUFS); 201 bzero(inp, inp_zero_size); 202 inp->inp_pcbinfo = pcbinfo; 203 inp->inp_socket = so; 204 inp->inp_cred = crhold(so->so_cred); 205 inp->inp_inc.inc_fibnum = so->so_fibnum; 206 #ifdef MAC 207 error = mac_inpcb_init(inp, M_NOWAIT); 208 if (error != 0) 209 goto out; 210 mac_inpcb_create(so, inp); 211 #endif 212 #ifdef IPSEC 213 error = ipsec_init_policy(so, &inp->inp_sp); 214 if (error != 0) { 215 #ifdef MAC 216 mac_inpcb_destroy(inp); 217 #endif 218 goto out; 219 } 220 #endif /*IPSEC*/ 221 #ifdef INET6 222 if (INP_SOCKAF(so) == AF_INET6) { 223 inp->inp_vflag |= INP_IPV6PROTO; 224 if (V_ip6_v6only) 225 inp->inp_flags |= IN6P_IPV6_V6ONLY; 226 } 227 #endif 228 LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list); 229 pcbinfo->ipi_count++; 230 so->so_pcb = (caddr_t)inp; 231 #ifdef INET6 232 if (V_ip6_auto_flowlabel) 233 inp->inp_flags |= IN6P_AUTOFLOWLABEL; 234 #endif 235 INP_WLOCK(inp); 236 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 237 inp->inp_refcount = 1; /* Reference from the inpcbinfo */ 238 #if defined(IPSEC) || defined(MAC) 239 out: 240 if (error != 0) { 241 crfree(inp->inp_cred); 242 uma_zfree(pcbinfo->ipi_zone, inp); 243 } 244 #endif 245 return (error); 246 } 247 248 int 249 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 250 { 251 int anonport, error; 252 253 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 254 INP_WLOCK_ASSERT(inp); 255 256 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) 257 return (EINVAL); 258 anonport = inp->inp_lport == 0 && (nam == NULL || 259 ((struct sockaddr_in *)nam)->sin_port == 0); 260 error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr, 261 &inp->inp_lport, cred); 262 if (error) 263 return (error); 264 if (in_pcbinshash(inp) != 0) { 265 inp->inp_laddr.s_addr = INADDR_ANY; 266 inp->inp_lport = 0; 267 return (EAGAIN); 268 } 269 if (anonport) 270 inp->inp_flags |= INP_ANONPORT; 271 return (0); 272 } 273 274 /* 275 * Set up a bind operation on a PCB, performing port allocation 276 * as required, but do not actually modify the PCB. Callers can 277 * either complete the bind by setting inp_laddr/inp_lport and 278 * calling in_pcbinshash(), or they can just use the resulting 279 * port and address to authorise the sending of a once-off packet. 280 * 281 * On error, the values of *laddrp and *lportp are not changed. 282 */ 283 int 284 in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp, 285 u_short *lportp, struct ucred *cred) 286 { 287 struct socket *so = inp->inp_socket; 288 unsigned short *lastport; 289 struct sockaddr_in *sin; 290 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 291 struct in_addr laddr; 292 u_short lport = 0; 293 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 294 int error; 295 int dorandom; 296 297 /* 298 * Because no actual state changes occur here, a global write lock on 299 * the pcbinfo isn't required. 300 */ 301 INP_INFO_LOCK_ASSERT(pcbinfo); 302 INP_LOCK_ASSERT(inp); 303 304 if (TAILQ_EMPTY(&V_in_ifaddrhead)) /* XXX broken! */ 305 return (EADDRNOTAVAIL); 306 laddr.s_addr = *laddrp; 307 if (nam != NULL && laddr.s_addr != INADDR_ANY) 308 return (EINVAL); 309 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 310 wild = INPLOOKUP_WILDCARD; 311 if (nam == NULL) { 312 if ((error = prison_local_ip4(cred, &laddr)) != 0) 313 return (error); 314 } else { 315 sin = (struct sockaddr_in *)nam; 316 if (nam->sa_len != sizeof (*sin)) 317 return (EINVAL); 318 #ifdef notdef 319 /* 320 * We should check the family, but old programs 321 * incorrectly fail to initialize it. 322 */ 323 if (sin->sin_family != AF_INET) 324 return (EAFNOSUPPORT); 325 #endif 326 error = prison_local_ip4(cred, &sin->sin_addr); 327 if (error) 328 return (error); 329 if (sin->sin_port != *lportp) { 330 /* Don't allow the port to change. */ 331 if (*lportp != 0) 332 return (EINVAL); 333 lport = sin->sin_port; 334 } 335 /* NB: lport is left as 0 if the port isn't being changed. */ 336 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 337 /* 338 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 339 * allow complete duplication of binding if 340 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 341 * and a multicast address is bound on both 342 * new and duplicated sockets. 343 */ 344 if (so->so_options & SO_REUSEADDR) 345 reuseport = SO_REUSEADDR|SO_REUSEPORT; 346 } else if (sin->sin_addr.s_addr != INADDR_ANY) { 347 sin->sin_port = 0; /* yech... */ 348 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 349 /* 350 * Is the address a local IP address? 351 * If INP_BINDANY is set, then the socket may be bound 352 * to any endpoint address, local or not. 353 */ 354 if ((inp->inp_flags & INP_BINDANY) == 0 && 355 ifa_ifwithaddr_check((struct sockaddr *)sin) == 0) 356 return (EADDRNOTAVAIL); 357 } 358 laddr = sin->sin_addr; 359 if (lport) { 360 struct inpcb *t; 361 struct tcptw *tw; 362 363 /* GROSS */ 364 if (ntohs(lport) <= V_ipport_reservedhigh && 365 ntohs(lport) >= V_ipport_reservedlow && 366 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 367 0)) 368 return (EACCES); 369 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && 370 priv_check_cred(inp->inp_cred, 371 PRIV_NETINET_REUSEPORT, 0) != 0) { 372 t = in_pcblookup_local(pcbinfo, sin->sin_addr, 373 lport, INPLOOKUP_WILDCARD, cred); 374 /* 375 * XXX 376 * This entire block sorely needs a rewrite. 377 */ 378 if (t && 379 ((t->inp_flags & INP_TIMEWAIT) == 0) && 380 (so->so_type != SOCK_STREAM || 381 ntohl(t->inp_faddr.s_addr) == INADDR_ANY) && 382 (ntohl(sin->sin_addr.s_addr) != INADDR_ANY || 383 ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 384 (t->inp_socket->so_options & 385 SO_REUSEPORT) == 0) && 386 (inp->inp_cred->cr_uid != 387 t->inp_cred->cr_uid)) 388 return (EADDRINUSE); 389 } 390 t = in_pcblookup_local(pcbinfo, sin->sin_addr, 391 lport, wild, cred); 392 if (t && (t->inp_flags & INP_TIMEWAIT)) { 393 /* 394 * XXXRW: If an incpb has had its timewait 395 * state recycled, we treat the address as 396 * being in use (for now). This is better 397 * than a panic, but not desirable. 398 */ 399 tw = intotw(inp); 400 if (tw == NULL || 401 (reuseport & tw->tw_so_options) == 0) 402 return (EADDRINUSE); 403 } else if (t && 404 (reuseport & t->inp_socket->so_options) == 0) { 405 #ifdef INET6 406 if (ntohl(sin->sin_addr.s_addr) != 407 INADDR_ANY || 408 ntohl(t->inp_laddr.s_addr) != 409 INADDR_ANY || 410 INP_SOCKAF(so) == 411 INP_SOCKAF(t->inp_socket)) 412 #endif 413 return (EADDRINUSE); 414 } 415 } 416 } 417 if (*lportp != 0) 418 lport = *lportp; 419 if (lport == 0) { 420 u_short first, last, aux; 421 int count; 422 423 if (inp->inp_flags & INP_HIGHPORT) { 424 first = V_ipport_hifirstauto; /* sysctl */ 425 last = V_ipport_hilastauto; 426 lastport = &pcbinfo->ipi_lasthi; 427 } else if (inp->inp_flags & INP_LOWPORT) { 428 error = priv_check_cred(cred, 429 PRIV_NETINET_RESERVEDPORT, 0); 430 if (error) 431 return error; 432 first = V_ipport_lowfirstauto; /* 1023 */ 433 last = V_ipport_lowlastauto; /* 600 */ 434 lastport = &pcbinfo->ipi_lastlow; 435 } else { 436 first = V_ipport_firstauto; /* sysctl */ 437 last = V_ipport_lastauto; 438 lastport = &pcbinfo->ipi_lastport; 439 } 440 /* 441 * For UDP, use random port allocation as long as the user 442 * allows it. For TCP (and as of yet unknown) connections, 443 * use random port allocation only if the user allows it AND 444 * ipport_tick() allows it. 445 */ 446 if (V_ipport_randomized && 447 (!V_ipport_stoprandom || pcbinfo == &V_udbinfo)) 448 dorandom = 1; 449 else 450 dorandom = 0; 451 /* 452 * It makes no sense to do random port allocation if 453 * we have the only port available. 454 */ 455 if (first == last) 456 dorandom = 0; 457 /* Make sure to not include UDP packets in the count. */ 458 if (pcbinfo != &V_udbinfo) 459 V_ipport_tcpallocs++; 460 /* 461 * Instead of having two loops further down counting up or down 462 * make sure that first is always <= last and go with only one 463 * code path implementing all logic. 464 */ 465 if (first > last) { 466 aux = first; 467 first = last; 468 last = aux; 469 } 470 471 if (dorandom) 472 *lastport = first + 473 (arc4random() % (last - first)); 474 475 count = last - first; 476 477 do { 478 if (count-- < 0) /* completely used? */ 479 return (EADDRNOTAVAIL); 480 ++*lastport; 481 if (*lastport < first || *lastport > last) 482 *lastport = first; 483 lport = htons(*lastport); 484 } while (in_pcblookup_local(pcbinfo, laddr, 485 lport, wild, cred)); 486 } 487 *laddrp = laddr.s_addr; 488 *lportp = lport; 489 return (0); 490 } 491 492 /* 493 * Connect from a socket to a specified address. 494 * Both address and port must be specified in argument sin. 495 * If don't have a local address for this socket yet, 496 * then pick one. 497 */ 498 int 499 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 500 { 501 u_short lport, fport; 502 in_addr_t laddr, faddr; 503 int anonport, error; 504 505 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 506 INP_WLOCK_ASSERT(inp); 507 508 lport = inp->inp_lport; 509 laddr = inp->inp_laddr.s_addr; 510 anonport = (lport == 0); 511 error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport, 512 NULL, cred); 513 if (error) 514 return (error); 515 516 /* Do the initial binding of the local address if required. */ 517 if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) { 518 inp->inp_lport = lport; 519 inp->inp_laddr.s_addr = laddr; 520 if (in_pcbinshash(inp) != 0) { 521 inp->inp_laddr.s_addr = INADDR_ANY; 522 inp->inp_lport = 0; 523 return (EAGAIN); 524 } 525 } 526 527 /* Commit the remaining changes. */ 528 inp->inp_lport = lport; 529 inp->inp_laddr.s_addr = laddr; 530 inp->inp_faddr.s_addr = faddr; 531 inp->inp_fport = fport; 532 in_pcbrehash(inp); 533 534 if (anonport) 535 inp->inp_flags |= INP_ANONPORT; 536 return (0); 537 } 538 539 /* 540 * Do proper source address selection on an unbound socket in case 541 * of connect. Take jails into account as well. 542 */ 543 static int 544 in_pcbladdr(struct inpcb *inp, struct in_addr *faddr, struct in_addr *laddr, 545 struct ucred *cred) 546 { 547 struct ifaddr *ifa; 548 struct sockaddr *sa; 549 struct sockaddr_in *sin; 550 struct route sro; 551 int error; 552 553 KASSERT(laddr != NULL, ("%s: laddr NULL", __func__)); 554 555 error = 0; 556 bzero(&sro, sizeof(sro)); 557 558 sin = (struct sockaddr_in *)&sro.ro_dst; 559 sin->sin_family = AF_INET; 560 sin->sin_len = sizeof(struct sockaddr_in); 561 sin->sin_addr.s_addr = faddr->s_addr; 562 563 /* 564 * If route is known our src addr is taken from the i/f, 565 * else punt. 566 * 567 * Find out route to destination. 568 */ 569 if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0) 570 in_rtalloc_ign(&sro, 0, inp->inp_inc.inc_fibnum); 571 572 /* 573 * If we found a route, use the address corresponding to 574 * the outgoing interface. 575 * 576 * Otherwise assume faddr is reachable on a directly connected 577 * network and try to find a corresponding interface to take 578 * the source address from. 579 */ 580 if (sro.ro_rt == NULL || sro.ro_rt->rt_ifp == NULL) { 581 struct in_ifaddr *ia; 582 struct ifnet *ifp; 583 584 ia = ifatoia(ifa_ifwithdstaddr((struct sockaddr *)sin)); 585 if (ia == NULL) 586 ia = ifatoia(ifa_ifwithnet((struct sockaddr *)sin)); 587 if (ia == NULL) { 588 error = ENETUNREACH; 589 goto done; 590 } 591 592 if (cred == NULL || !prison_flag(cred, PR_IP4)) { 593 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 594 ifa_free(&ia->ia_ifa); 595 goto done; 596 } 597 598 ifp = ia->ia_ifp; 599 ifa_free(&ia->ia_ifa); 600 ia = NULL; 601 IF_ADDR_LOCK(ifp); 602 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 603 604 sa = ifa->ifa_addr; 605 if (sa->sa_family != AF_INET) 606 continue; 607 sin = (struct sockaddr_in *)sa; 608 if (prison_check_ip4(cred, &sin->sin_addr) == 0) { 609 ia = (struct in_ifaddr *)ifa; 610 break; 611 } 612 } 613 if (ia != NULL) { 614 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 615 IF_ADDR_UNLOCK(ifp); 616 goto done; 617 } 618 IF_ADDR_UNLOCK(ifp); 619 620 /* 3. As a last resort return the 'default' jail address. */ 621 error = prison_get_ip4(cred, laddr); 622 goto done; 623 } 624 625 /* 626 * If the outgoing interface on the route found is not 627 * a loopback interface, use the address from that interface. 628 * In case of jails do those three steps: 629 * 1. check if the interface address belongs to the jail. If so use it. 630 * 2. check if we have any address on the outgoing interface 631 * belonging to this jail. If so use it. 632 * 3. as a last resort return the 'default' jail address. 633 */ 634 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) { 635 struct in_ifaddr *ia; 636 struct ifnet *ifp; 637 638 /* If not jailed, use the default returned. */ 639 if (cred == NULL || !prison_flag(cred, PR_IP4)) { 640 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa; 641 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 642 goto done; 643 } 644 645 /* Jailed. */ 646 /* 1. Check if the iface address belongs to the jail. */ 647 sin = (struct sockaddr_in *)sro.ro_rt->rt_ifa->ifa_addr; 648 if (prison_check_ip4(cred, &sin->sin_addr) == 0) { 649 ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa; 650 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 651 goto done; 652 } 653 654 /* 655 * 2. Check if we have any address on the outgoing interface 656 * belonging to this jail. 657 */ 658 ia = NULL; 659 ifp = sro.ro_rt->rt_ifp; 660 IF_ADDR_LOCK(ifp); 661 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 662 sa = ifa->ifa_addr; 663 if (sa->sa_family != AF_INET) 664 continue; 665 sin = (struct sockaddr_in *)sa; 666 if (prison_check_ip4(cred, &sin->sin_addr) == 0) { 667 ia = (struct in_ifaddr *)ifa; 668 break; 669 } 670 } 671 if (ia != NULL) { 672 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 673 IF_ADDR_UNLOCK(ifp); 674 goto done; 675 } 676 IF_ADDR_UNLOCK(ifp); 677 678 /* 3. As a last resort return the 'default' jail address. */ 679 error = prison_get_ip4(cred, laddr); 680 goto done; 681 } 682 683 /* 684 * The outgoing interface is marked with 'loopback net', so a route 685 * to ourselves is here. 686 * Try to find the interface of the destination address and then 687 * take the address from there. That interface is not necessarily 688 * a loopback interface. 689 * In case of jails, check that it is an address of the jail 690 * and if we cannot find, fall back to the 'default' jail address. 691 */ 692 if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { 693 struct sockaddr_in sain; 694 struct in_ifaddr *ia; 695 696 bzero(&sain, sizeof(struct sockaddr_in)); 697 sain.sin_family = AF_INET; 698 sain.sin_len = sizeof(struct sockaddr_in); 699 sain.sin_addr.s_addr = faddr->s_addr; 700 701 ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sain))); 702 if (ia == NULL) 703 ia = ifatoia(ifa_ifwithnet(sintosa(&sain))); 704 705 if (cred == NULL || !prison_flag(cred, PR_IP4)) { 706 if (ia == NULL) { 707 error = ENETUNREACH; 708 goto done; 709 } 710 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 711 ifa_free(&ia->ia_ifa); 712 goto done; 713 } 714 715 /* Jailed. */ 716 if (ia != NULL) { 717 struct ifnet *ifp; 718 719 ifp = ia->ia_ifp; 720 ifa_free(&ia->ia_ifa); 721 ia = NULL; 722 IF_ADDR_LOCK(ifp); 723 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 724 725 sa = ifa->ifa_addr; 726 if (sa->sa_family != AF_INET) 727 continue; 728 sin = (struct sockaddr_in *)sa; 729 if (prison_check_ip4(cred, 730 &sin->sin_addr) == 0) { 731 ia = (struct in_ifaddr *)ifa; 732 break; 733 } 734 } 735 if (ia != NULL) { 736 laddr->s_addr = ia->ia_addr.sin_addr.s_addr; 737 IF_ADDR_UNLOCK(ifp); 738 goto done; 739 } 740 IF_ADDR_UNLOCK(ifp); 741 } 742 743 /* 3. As a last resort return the 'default' jail address. */ 744 error = prison_get_ip4(cred, laddr); 745 goto done; 746 } 747 748 done: 749 if (sro.ro_rt != NULL) 750 RTFREE(sro.ro_rt); 751 return (error); 752 } 753 754 /* 755 * Set up for a connect from a socket to the specified address. 756 * On entry, *laddrp and *lportp should contain the current local 757 * address and port for the PCB; these are updated to the values 758 * that should be placed in inp_laddr and inp_lport to complete 759 * the connect. 760 * 761 * On success, *faddrp and *fportp will be set to the remote address 762 * and port. These are not updated in the error case. 763 * 764 * If the operation fails because the connection already exists, 765 * *oinpp will be set to the PCB of that connection so that the 766 * caller can decide to override it. In all other cases, *oinpp 767 * is set to NULL. 768 */ 769 int 770 in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam, 771 in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp, 772 struct inpcb **oinpp, struct ucred *cred) 773 { 774 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 775 struct in_ifaddr *ia; 776 struct inpcb *oinp; 777 struct in_addr laddr, faddr; 778 u_short lport, fport; 779 int error; 780 781 /* 782 * Because a global state change doesn't actually occur here, a read 783 * lock is sufficient. 784 */ 785 INP_INFO_LOCK_ASSERT(inp->inp_pcbinfo); 786 INP_LOCK_ASSERT(inp); 787 788 if (oinpp != NULL) 789 *oinpp = NULL; 790 if (nam->sa_len != sizeof (*sin)) 791 return (EINVAL); 792 if (sin->sin_family != AF_INET) 793 return (EAFNOSUPPORT); 794 if (sin->sin_port == 0) 795 return (EADDRNOTAVAIL); 796 laddr.s_addr = *laddrp; 797 lport = *lportp; 798 faddr = sin->sin_addr; 799 fport = sin->sin_port; 800 801 if (!TAILQ_EMPTY(&V_in_ifaddrhead)) { 802 /* 803 * If the destination address is INADDR_ANY, 804 * use the primary local address. 805 * If the supplied address is INADDR_BROADCAST, 806 * and the primary interface supports broadcast, 807 * choose the broadcast address for that interface. 808 */ 809 if (faddr.s_addr == INADDR_ANY) { 810 IN_IFADDR_RLOCK(); 811 faddr = 812 IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr; 813 IN_IFADDR_RUNLOCK(); 814 if (cred != NULL && 815 (error = prison_get_ip4(cred, &faddr)) != 0) 816 return (error); 817 } else if (faddr.s_addr == (u_long)INADDR_BROADCAST) { 818 IN_IFADDR_RLOCK(); 819 if (TAILQ_FIRST(&V_in_ifaddrhead)->ia_ifp->if_flags & 820 IFF_BROADCAST) 821 faddr = satosin(&TAILQ_FIRST( 822 &V_in_ifaddrhead)->ia_broadaddr)->sin_addr; 823 IN_IFADDR_RUNLOCK(); 824 } 825 } 826 if (laddr.s_addr == INADDR_ANY) { 827 error = in_pcbladdr(inp, &faddr, &laddr, cred); 828 if (error) 829 return (error); 830 831 /* 832 * If the destination address is multicast and an outgoing 833 * interface has been set as a multicast option, use the 834 * address of that interface as our source address. 835 */ 836 if (IN_MULTICAST(ntohl(faddr.s_addr)) && 837 inp->inp_moptions != NULL) { 838 struct ip_moptions *imo; 839 struct ifnet *ifp; 840 841 imo = inp->inp_moptions; 842 if (imo->imo_multicast_ifp != NULL) { 843 ifp = imo->imo_multicast_ifp; 844 IN_IFADDR_RLOCK(); 845 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 846 if (ia->ia_ifp == ifp) 847 break; 848 if (ia == NULL) { 849 IN_IFADDR_RUNLOCK(); 850 return (EADDRNOTAVAIL); 851 } 852 laddr = ia->ia_addr.sin_addr; 853 IN_IFADDR_RUNLOCK(); 854 } 855 } 856 } 857 858 oinp = in_pcblookup_hash(inp->inp_pcbinfo, faddr, fport, laddr, lport, 859 0, NULL); 860 if (oinp != NULL) { 861 if (oinpp != NULL) 862 *oinpp = oinp; 863 return (EADDRINUSE); 864 } 865 if (lport == 0) { 866 error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport, 867 cred); 868 if (error) 869 return (error); 870 } 871 *laddrp = laddr.s_addr; 872 *lportp = lport; 873 *faddrp = faddr.s_addr; 874 *fportp = fport; 875 return (0); 876 } 877 878 void 879 in_pcbdisconnect(struct inpcb *inp) 880 { 881 882 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 883 INP_WLOCK_ASSERT(inp); 884 885 inp->inp_faddr.s_addr = INADDR_ANY; 886 inp->inp_fport = 0; 887 in_pcbrehash(inp); 888 } 889 890 /* 891 * in_pcbdetach() is responsibe for disassociating a socket from an inpcb. 892 * For most protocols, this will be invoked immediately prior to calling 893 * in_pcbfree(). However, with TCP the inpcb may significantly outlive the 894 * socket, in which case in_pcbfree() is deferred. 895 */ 896 void 897 in_pcbdetach(struct inpcb *inp) 898 { 899 900 KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__)); 901 902 inp->inp_socket->so_pcb = NULL; 903 inp->inp_socket = NULL; 904 } 905 906 /* 907 * in_pcbfree_internal() frees an inpcb that has been detached from its 908 * socket, and whose reference count has reached 0. It will also remove the 909 * inpcb from any global lists it might remain on. 910 */ 911 static void 912 in_pcbfree_internal(struct inpcb *inp) 913 { 914 struct inpcbinfo *ipi = inp->inp_pcbinfo; 915 916 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__)); 917 KASSERT(inp->inp_refcount == 0, ("%s: refcount !0", __func__)); 918 919 INP_INFO_WLOCK_ASSERT(ipi); 920 INP_WLOCK_ASSERT(inp); 921 922 #ifdef IPSEC 923 if (inp->inp_sp != NULL) 924 ipsec_delete_pcbpolicy(inp); 925 #endif /* IPSEC */ 926 inp->inp_gencnt = ++ipi->ipi_gencnt; 927 in_pcbremlists(inp); 928 #ifdef INET6 929 if (inp->inp_vflag & INP_IPV6PROTO) { 930 ip6_freepcbopts(inp->in6p_outputopts); 931 if (inp->in6p_moptions != NULL) 932 ip6_freemoptions(inp->in6p_moptions); 933 } 934 #endif 935 if (inp->inp_options) 936 (void)m_free(inp->inp_options); 937 if (inp->inp_moptions != NULL) 938 inp_freemoptions(inp->inp_moptions); 939 inp->inp_vflag = 0; 940 crfree(inp->inp_cred); 941 942 #ifdef MAC 943 mac_inpcb_destroy(inp); 944 #endif 945 INP_WUNLOCK(inp); 946 uma_zfree(ipi->ipi_zone, inp); 947 } 948 949 /* 950 * in_pcbref() bumps the reference count on an inpcb in order to maintain 951 * stability of an inpcb pointer despite the inpcb lock being released. This 952 * is used in TCP when the inpcbinfo lock needs to be acquired or upgraded, 953 * but where the inpcb lock is already held. 954 * 955 * While the inpcb will not be freed, releasing the inpcb lock means that the 956 * connection's state may change, so the caller should be careful to 957 * revalidate any cached state on reacquiring the lock. Drop the reference 958 * using in_pcbrele(). 959 */ 960 void 961 in_pcbref(struct inpcb *inp) 962 { 963 964 INP_WLOCK_ASSERT(inp); 965 966 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__)); 967 968 inp->inp_refcount++; 969 } 970 971 /* 972 * Drop a refcount on an inpcb elevated using in_pcbref(); because a call to 973 * in_pcbfree() may have been made between in_pcbref() and in_pcbrele(), we 974 * return a flag indicating whether or not the inpcb remains valid. If it is 975 * valid, we return with the inpcb lock held. 976 */ 977 int 978 in_pcbrele(struct inpcb *inp) 979 { 980 #ifdef INVARIANTS 981 struct inpcbinfo *ipi = inp->inp_pcbinfo; 982 #endif 983 984 KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__)); 985 986 INP_INFO_WLOCK_ASSERT(ipi); 987 INP_WLOCK_ASSERT(inp); 988 989 inp->inp_refcount--; 990 if (inp->inp_refcount > 0) 991 return (0); 992 in_pcbfree_internal(inp); 993 return (1); 994 } 995 996 /* 997 * Unconditionally schedule an inpcb to be freed by decrementing its 998 * reference count, which should occur only after the inpcb has been detached 999 * from its socket. If another thread holds a temporary reference (acquired 1000 * using in_pcbref()) then the free is deferred until that reference is 1001 * released using in_pcbrele(), but the inpcb is still unlocked. 1002 */ 1003 void 1004 in_pcbfree(struct inpcb *inp) 1005 { 1006 #ifdef INVARIANTS 1007 struct inpcbinfo *ipi = inp->inp_pcbinfo; 1008 #endif 1009 1010 KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", 1011 __func__)); 1012 1013 INP_INFO_WLOCK_ASSERT(ipi); 1014 INP_WLOCK_ASSERT(inp); 1015 1016 if (!in_pcbrele(inp)) 1017 INP_WUNLOCK(inp); 1018 } 1019 1020 /* 1021 * in_pcbdrop() removes an inpcb from hashed lists, releasing its address and 1022 * port reservation, and preventing it from being returned by inpcb lookups. 1023 * 1024 * It is used by TCP to mark an inpcb as unused and avoid future packet 1025 * delivery or event notification when a socket remains open but TCP has 1026 * closed. This might occur as a result of a shutdown()-initiated TCP close 1027 * or a RST on the wire, and allows the port binding to be reused while still 1028 * maintaining the invariant that so_pcb always points to a valid inpcb until 1029 * in_pcbdetach(). 1030 * 1031 * XXXRW: An inp_lport of 0 is used to indicate that the inpcb is not on hash 1032 * lists, but can lead to confusing netstat output, as open sockets with 1033 * closed TCP connections will no longer appear to have their bound port 1034 * number. An explicit flag would be better, as it would allow us to leave 1035 * the port number intact after the connection is dropped. 1036 * 1037 * XXXRW: Possibly in_pcbdrop() should also prevent future notifications by 1038 * in_pcbnotifyall() and in_pcbpurgeif0()? 1039 */ 1040 void 1041 in_pcbdrop(struct inpcb *inp) 1042 { 1043 1044 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 1045 INP_WLOCK_ASSERT(inp); 1046 1047 inp->inp_flags |= INP_DROPPED; 1048 if (inp->inp_flags & INP_INHASHLIST) { 1049 struct inpcbport *phd = inp->inp_phd; 1050 1051 LIST_REMOVE(inp, inp_hash); 1052 LIST_REMOVE(inp, inp_portlist); 1053 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1054 LIST_REMOVE(phd, phd_hash); 1055 free(phd, M_PCB); 1056 } 1057 inp->inp_flags &= ~INP_INHASHLIST; 1058 } 1059 } 1060 1061 /* 1062 * Common routines to return the socket addresses associated with inpcbs. 1063 */ 1064 struct sockaddr * 1065 in_sockaddr(in_port_t port, struct in_addr *addr_p) 1066 { 1067 struct sockaddr_in *sin; 1068 1069 sin = malloc(sizeof *sin, M_SONAME, 1070 M_WAITOK | M_ZERO); 1071 sin->sin_family = AF_INET; 1072 sin->sin_len = sizeof(*sin); 1073 sin->sin_addr = *addr_p; 1074 sin->sin_port = port; 1075 1076 return (struct sockaddr *)sin; 1077 } 1078 1079 int 1080 in_getsockaddr(struct socket *so, struct sockaddr **nam) 1081 { 1082 struct inpcb *inp; 1083 struct in_addr addr; 1084 in_port_t port; 1085 1086 inp = sotoinpcb(so); 1087 KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL")); 1088 1089 INP_RLOCK(inp); 1090 port = inp->inp_lport; 1091 addr = inp->inp_laddr; 1092 INP_RUNLOCK(inp); 1093 1094 *nam = in_sockaddr(port, &addr); 1095 return 0; 1096 } 1097 1098 int 1099 in_getpeeraddr(struct socket *so, struct sockaddr **nam) 1100 { 1101 struct inpcb *inp; 1102 struct in_addr addr; 1103 in_port_t port; 1104 1105 inp = sotoinpcb(so); 1106 KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL")); 1107 1108 INP_RLOCK(inp); 1109 port = inp->inp_fport; 1110 addr = inp->inp_faddr; 1111 INP_RUNLOCK(inp); 1112 1113 *nam = in_sockaddr(port, &addr); 1114 return 0; 1115 } 1116 1117 void 1118 in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno, 1119 struct inpcb *(*notify)(struct inpcb *, int)) 1120 { 1121 struct inpcb *inp, *inp_temp; 1122 1123 INP_INFO_WLOCK(pcbinfo); 1124 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 1125 INP_WLOCK(inp); 1126 #ifdef INET6 1127 if ((inp->inp_vflag & INP_IPV4) == 0) { 1128 INP_WUNLOCK(inp); 1129 continue; 1130 } 1131 #endif 1132 if (inp->inp_faddr.s_addr != faddr.s_addr || 1133 inp->inp_socket == NULL) { 1134 INP_WUNLOCK(inp); 1135 continue; 1136 } 1137 if ((*notify)(inp, errno)) 1138 INP_WUNLOCK(inp); 1139 } 1140 INP_INFO_WUNLOCK(pcbinfo); 1141 } 1142 1143 void 1144 in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 1145 { 1146 struct inpcb *inp; 1147 struct ip_moptions *imo; 1148 int i, gap; 1149 1150 INP_INFO_RLOCK(pcbinfo); 1151 LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 1152 INP_WLOCK(inp); 1153 imo = inp->inp_moptions; 1154 if ((inp->inp_vflag & INP_IPV4) && 1155 imo != NULL) { 1156 /* 1157 * Unselect the outgoing interface if it is being 1158 * detached. 1159 */ 1160 if (imo->imo_multicast_ifp == ifp) 1161 imo->imo_multicast_ifp = NULL; 1162 1163 /* 1164 * Drop multicast group membership if we joined 1165 * through the interface being detached. 1166 */ 1167 for (i = 0, gap = 0; i < imo->imo_num_memberships; 1168 i++) { 1169 if (imo->imo_membership[i]->inm_ifp == ifp) { 1170 in_delmulti(imo->imo_membership[i]); 1171 gap++; 1172 } else if (gap != 0) 1173 imo->imo_membership[i - gap] = 1174 imo->imo_membership[i]; 1175 } 1176 imo->imo_num_memberships -= gap; 1177 } 1178 INP_WUNLOCK(inp); 1179 } 1180 INP_INFO_RUNLOCK(pcbinfo); 1181 } 1182 1183 /* 1184 * Lookup a PCB based on the local address and port. 1185 */ 1186 #define INP_LOOKUP_MAPPED_PCB_COST 3 1187 struct inpcb * 1188 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr, 1189 u_short lport, int wild_okay, struct ucred *cred) 1190 { 1191 struct inpcb *inp; 1192 #ifdef INET6 1193 int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST; 1194 #else 1195 int matchwild = 3; 1196 #endif 1197 int wildcard; 1198 1199 INP_INFO_LOCK_ASSERT(pcbinfo); 1200 1201 if (!wild_okay) { 1202 struct inpcbhead *head; 1203 /* 1204 * Look for an unconnected (wildcard foreign addr) PCB that 1205 * matches the local address and port we're looking for. 1206 */ 1207 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 1208 0, pcbinfo->ipi_hashmask)]; 1209 LIST_FOREACH(inp, head, inp_hash) { 1210 #ifdef INET6 1211 /* XXX inp locking */ 1212 if ((inp->inp_vflag & INP_IPV4) == 0) 1213 continue; 1214 #endif 1215 if (inp->inp_faddr.s_addr == INADDR_ANY && 1216 inp->inp_laddr.s_addr == laddr.s_addr && 1217 inp->inp_lport == lport) { 1218 /* 1219 * Found? 1220 */ 1221 if (cred == NULL || 1222 prison_equal_ip4(cred->cr_prison, 1223 inp->inp_cred->cr_prison)) 1224 return (inp); 1225 } 1226 } 1227 /* 1228 * Not found. 1229 */ 1230 return (NULL); 1231 } else { 1232 struct inpcbporthead *porthash; 1233 struct inpcbport *phd; 1234 struct inpcb *match = NULL; 1235 /* 1236 * Best fit PCB lookup. 1237 * 1238 * First see if this local port is in use by looking on the 1239 * port hash list. 1240 */ 1241 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 1242 pcbinfo->ipi_porthashmask)]; 1243 LIST_FOREACH(phd, porthash, phd_hash) { 1244 if (phd->phd_port == lport) 1245 break; 1246 } 1247 if (phd != NULL) { 1248 /* 1249 * Port is in use by one or more PCBs. Look for best 1250 * fit. 1251 */ 1252 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1253 wildcard = 0; 1254 if (cred != NULL && 1255 !prison_equal_ip4(inp->inp_cred->cr_prison, 1256 cred->cr_prison)) 1257 continue; 1258 #ifdef INET6 1259 /* XXX inp locking */ 1260 if ((inp->inp_vflag & INP_IPV4) == 0) 1261 continue; 1262 /* 1263 * We never select the PCB that has 1264 * INP_IPV6 flag and is bound to :: if 1265 * we have another PCB which is bound 1266 * to 0.0.0.0. If a PCB has the 1267 * INP_IPV6 flag, then we set its cost 1268 * higher than IPv4 only PCBs. 1269 * 1270 * Note that the case only happens 1271 * when a socket is bound to ::, under 1272 * the condition that the use of the 1273 * mapped address is allowed. 1274 */ 1275 if ((inp->inp_vflag & INP_IPV6) != 0) 1276 wildcard += INP_LOOKUP_MAPPED_PCB_COST; 1277 #endif 1278 if (inp->inp_faddr.s_addr != INADDR_ANY) 1279 wildcard++; 1280 if (inp->inp_laddr.s_addr != INADDR_ANY) { 1281 if (laddr.s_addr == INADDR_ANY) 1282 wildcard++; 1283 else if (inp->inp_laddr.s_addr != laddr.s_addr) 1284 continue; 1285 } else { 1286 if (laddr.s_addr != INADDR_ANY) 1287 wildcard++; 1288 } 1289 if (wildcard < matchwild) { 1290 match = inp; 1291 matchwild = wildcard; 1292 if (matchwild == 0) 1293 break; 1294 } 1295 } 1296 } 1297 return (match); 1298 } 1299 } 1300 #undef INP_LOOKUP_MAPPED_PCB_COST 1301 1302 /* 1303 * Lookup PCB in hash list. 1304 */ 1305 struct inpcb * 1306 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, 1307 u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard, 1308 struct ifnet *ifp) 1309 { 1310 struct inpcbhead *head; 1311 struct inpcb *inp, *tmpinp; 1312 u_short fport = fport_arg, lport = lport_arg; 1313 1314 INP_INFO_LOCK_ASSERT(pcbinfo); 1315 1316 /* 1317 * First look for an exact match. 1318 */ 1319 tmpinp = NULL; 1320 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, 1321 pcbinfo->ipi_hashmask)]; 1322 LIST_FOREACH(inp, head, inp_hash) { 1323 #ifdef INET6 1324 /* XXX inp locking */ 1325 if ((inp->inp_vflag & INP_IPV4) == 0) 1326 continue; 1327 #endif 1328 if (inp->inp_faddr.s_addr == faddr.s_addr && 1329 inp->inp_laddr.s_addr == laddr.s_addr && 1330 inp->inp_fport == fport && 1331 inp->inp_lport == lport) { 1332 /* 1333 * XXX We should be able to directly return 1334 * the inp here, without any checks. 1335 * Well unless both bound with SO_REUSEPORT? 1336 */ 1337 if (prison_flag(inp->inp_cred, PR_IP4)) 1338 return (inp); 1339 if (tmpinp == NULL) 1340 tmpinp = inp; 1341 } 1342 } 1343 if (tmpinp != NULL) 1344 return (tmpinp); 1345 1346 /* 1347 * Then look for a wildcard match, if requested. 1348 */ 1349 if (wildcard == INPLOOKUP_WILDCARD) { 1350 struct inpcb *local_wild = NULL, *local_exact = NULL; 1351 #ifdef INET6 1352 struct inpcb *local_wild_mapped = NULL; 1353 #endif 1354 struct inpcb *jail_wild = NULL; 1355 int injail; 1356 1357 /* 1358 * Order of socket selection - we always prefer jails. 1359 * 1. jailed, non-wild. 1360 * 2. jailed, wild. 1361 * 3. non-jailed, non-wild. 1362 * 4. non-jailed, wild. 1363 */ 1364 1365 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 1366 0, pcbinfo->ipi_hashmask)]; 1367 LIST_FOREACH(inp, head, inp_hash) { 1368 #ifdef INET6 1369 /* XXX inp locking */ 1370 if ((inp->inp_vflag & INP_IPV4) == 0) 1371 continue; 1372 #endif 1373 if (inp->inp_faddr.s_addr != INADDR_ANY || 1374 inp->inp_lport != lport) 1375 continue; 1376 1377 /* XXX inp locking */ 1378 if (ifp && ifp->if_type == IFT_FAITH && 1379 (inp->inp_flags & INP_FAITH) == 0) 1380 continue; 1381 1382 injail = prison_flag(inp->inp_cred, PR_IP4); 1383 if (injail) { 1384 if (prison_check_ip4(inp->inp_cred, 1385 &laddr) != 0) 1386 continue; 1387 } else { 1388 if (local_exact != NULL) 1389 continue; 1390 } 1391 1392 if (inp->inp_laddr.s_addr == laddr.s_addr) { 1393 if (injail) 1394 return (inp); 1395 else 1396 local_exact = inp; 1397 } else if (inp->inp_laddr.s_addr == INADDR_ANY) { 1398 #ifdef INET6 1399 /* XXX inp locking, NULL check */ 1400 if (inp->inp_vflag & INP_IPV6PROTO) 1401 local_wild_mapped = inp; 1402 else 1403 #endif /* INET6 */ 1404 if (injail) 1405 jail_wild = inp; 1406 else 1407 local_wild = inp; 1408 } 1409 } /* LIST_FOREACH */ 1410 if (jail_wild != NULL) 1411 return (jail_wild); 1412 if (local_exact != NULL) 1413 return (local_exact); 1414 if (local_wild != NULL) 1415 return (local_wild); 1416 #ifdef INET6 1417 if (local_wild_mapped != NULL) 1418 return (local_wild_mapped); 1419 #endif /* defined(INET6) */ 1420 } /* if (wildcard == INPLOOKUP_WILDCARD) */ 1421 1422 return (NULL); 1423 } 1424 1425 /* 1426 * Insert PCB onto various hash lists. 1427 */ 1428 int 1429 in_pcbinshash(struct inpcb *inp) 1430 { 1431 struct inpcbhead *pcbhash; 1432 struct inpcbporthead *pcbporthash; 1433 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1434 struct inpcbport *phd; 1435 u_int32_t hashkey_faddr; 1436 1437 INP_INFO_WLOCK_ASSERT(pcbinfo); 1438 INP_WLOCK_ASSERT(inp); 1439 KASSERT((inp->inp_flags & INP_INHASHLIST) == 0, 1440 ("in_pcbinshash: INP_INHASHLIST")); 1441 1442 #ifdef INET6 1443 if (inp->inp_vflag & INP_IPV6) 1444 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */; 1445 else 1446 #endif /* INET6 */ 1447 hashkey_faddr = inp->inp_faddr.s_addr; 1448 1449 pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr, 1450 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)]; 1451 1452 pcbporthash = &pcbinfo->ipi_porthashbase[ 1453 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)]; 1454 1455 /* 1456 * Go through port list and look for a head for this lport. 1457 */ 1458 LIST_FOREACH(phd, pcbporthash, phd_hash) { 1459 if (phd->phd_port == inp->inp_lport) 1460 break; 1461 } 1462 /* 1463 * If none exists, malloc one and tack it on. 1464 */ 1465 if (phd == NULL) { 1466 phd = malloc(sizeof(struct inpcbport), M_PCB, M_NOWAIT); 1467 if (phd == NULL) { 1468 return (ENOBUFS); /* XXX */ 1469 } 1470 phd->phd_port = inp->inp_lport; 1471 LIST_INIT(&phd->phd_pcblist); 1472 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash); 1473 } 1474 inp->inp_phd = phd; 1475 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist); 1476 LIST_INSERT_HEAD(pcbhash, inp, inp_hash); 1477 inp->inp_flags |= INP_INHASHLIST; 1478 return (0); 1479 } 1480 1481 /* 1482 * Move PCB to the proper hash bucket when { faddr, fport } have been 1483 * changed. NOTE: This does not handle the case of the lport changing (the 1484 * hashed port list would have to be updated as well), so the lport must 1485 * not change after in_pcbinshash() has been called. 1486 */ 1487 void 1488 in_pcbrehash(struct inpcb *inp) 1489 { 1490 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1491 struct inpcbhead *head; 1492 u_int32_t hashkey_faddr; 1493 1494 INP_INFO_WLOCK_ASSERT(pcbinfo); 1495 INP_WLOCK_ASSERT(inp); 1496 KASSERT(inp->inp_flags & INP_INHASHLIST, 1497 ("in_pcbrehash: !INP_INHASHLIST")); 1498 1499 #ifdef INET6 1500 if (inp->inp_vflag & INP_IPV6) 1501 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */; 1502 else 1503 #endif /* INET6 */ 1504 hashkey_faddr = inp->inp_faddr.s_addr; 1505 1506 head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr, 1507 inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)]; 1508 1509 LIST_REMOVE(inp, inp_hash); 1510 LIST_INSERT_HEAD(head, inp, inp_hash); 1511 } 1512 1513 /* 1514 * Remove PCB from various lists. 1515 */ 1516 static void 1517 in_pcbremlists(struct inpcb *inp) 1518 { 1519 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1520 1521 INP_INFO_WLOCK_ASSERT(pcbinfo); 1522 INP_WLOCK_ASSERT(inp); 1523 1524 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 1525 if (inp->inp_flags & INP_INHASHLIST) { 1526 struct inpcbport *phd = inp->inp_phd; 1527 1528 LIST_REMOVE(inp, inp_hash); 1529 LIST_REMOVE(inp, inp_portlist); 1530 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1531 LIST_REMOVE(phd, phd_hash); 1532 free(phd, M_PCB); 1533 } 1534 inp->inp_flags &= ~INP_INHASHLIST; 1535 } 1536 LIST_REMOVE(inp, inp_list); 1537 pcbinfo->ipi_count--; 1538 } 1539 1540 /* 1541 * A set label operation has occurred at the socket layer, propagate the 1542 * label change into the in_pcb for the socket. 1543 */ 1544 void 1545 in_pcbsosetlabel(struct socket *so) 1546 { 1547 #ifdef MAC 1548 struct inpcb *inp; 1549 1550 inp = sotoinpcb(so); 1551 KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL")); 1552 1553 INP_WLOCK(inp); 1554 SOCK_LOCK(so); 1555 mac_inpcb_sosetlabel(so, inp); 1556 SOCK_UNLOCK(so); 1557 INP_WUNLOCK(inp); 1558 #endif 1559 } 1560 1561 /* 1562 * ipport_tick runs once per second, determining if random port allocation 1563 * should be continued. If more than ipport_randomcps ports have been 1564 * allocated in the last second, then we return to sequential port 1565 * allocation. We return to random allocation only once we drop below 1566 * ipport_randomcps for at least ipport_randomtime seconds. 1567 */ 1568 void 1569 ipport_tick(void *xtp) 1570 { 1571 VNET_ITERATOR_DECL(vnet_iter); 1572 1573 VNET_LIST_RLOCK_NOSLEEP(); 1574 VNET_FOREACH(vnet_iter) { 1575 CURVNET_SET(vnet_iter); /* XXX appease INVARIANTS here */ 1576 if (V_ipport_tcpallocs <= 1577 V_ipport_tcplastcount + V_ipport_randomcps) { 1578 if (V_ipport_stoprandom > 0) 1579 V_ipport_stoprandom--; 1580 } else 1581 V_ipport_stoprandom = V_ipport_randomtime; 1582 V_ipport_tcplastcount = V_ipport_tcpallocs; 1583 CURVNET_RESTORE(); 1584 } 1585 VNET_LIST_RUNLOCK_NOSLEEP(); 1586 callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL); 1587 } 1588 1589 void 1590 inp_wlock(struct inpcb *inp) 1591 { 1592 1593 INP_WLOCK(inp); 1594 } 1595 1596 void 1597 inp_wunlock(struct inpcb *inp) 1598 { 1599 1600 INP_WUNLOCK(inp); 1601 } 1602 1603 void 1604 inp_rlock(struct inpcb *inp) 1605 { 1606 1607 INP_RLOCK(inp); 1608 } 1609 1610 void 1611 inp_runlock(struct inpcb *inp) 1612 { 1613 1614 INP_RUNLOCK(inp); 1615 } 1616 1617 #ifdef INVARIANTS 1618 void 1619 inp_lock_assert(struct inpcb *inp) 1620 { 1621 1622 INP_WLOCK_ASSERT(inp); 1623 } 1624 1625 void 1626 inp_unlock_assert(struct inpcb *inp) 1627 { 1628 1629 INP_UNLOCK_ASSERT(inp); 1630 } 1631 #endif 1632 1633 void 1634 inp_apply_all(void (*func)(struct inpcb *, void *), void *arg) 1635 { 1636 struct inpcb *inp; 1637 1638 INP_INFO_RLOCK(&V_tcbinfo); 1639 LIST_FOREACH(inp, V_tcbinfo.ipi_listhead, inp_list) { 1640 INP_WLOCK(inp); 1641 func(inp, arg); 1642 INP_WUNLOCK(inp); 1643 } 1644 INP_INFO_RUNLOCK(&V_tcbinfo); 1645 } 1646 1647 struct socket * 1648 inp_inpcbtosocket(struct inpcb *inp) 1649 { 1650 1651 INP_WLOCK_ASSERT(inp); 1652 return (inp->inp_socket); 1653 } 1654 1655 struct tcpcb * 1656 inp_inpcbtotcpcb(struct inpcb *inp) 1657 { 1658 1659 INP_WLOCK_ASSERT(inp); 1660 return ((struct tcpcb *)inp->inp_ppcb); 1661 } 1662 1663 int 1664 inp_ip_tos_get(const struct inpcb *inp) 1665 { 1666 1667 return (inp->inp_ip_tos); 1668 } 1669 1670 void 1671 inp_ip_tos_set(struct inpcb *inp, int val) 1672 { 1673 1674 inp->inp_ip_tos = val; 1675 } 1676 1677 void 1678 inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp, 1679 uint32_t *faddr, uint16_t *fp) 1680 { 1681 1682 INP_LOCK_ASSERT(inp); 1683 *laddr = inp->inp_laddr.s_addr; 1684 *faddr = inp->inp_faddr.s_addr; 1685 *lp = inp->inp_lport; 1686 *fp = inp->inp_fport; 1687 } 1688 1689 struct inpcb * 1690 so_sotoinpcb(struct socket *so) 1691 { 1692 1693 return (sotoinpcb(so)); 1694 } 1695 1696 struct tcpcb * 1697 so_sototcpcb(struct socket *so) 1698 { 1699 1700 return (sototcpcb(so)); 1701 } 1702 1703 #ifdef DDB 1704 static void 1705 db_print_indent(int indent) 1706 { 1707 int i; 1708 1709 for (i = 0; i < indent; i++) 1710 db_printf(" "); 1711 } 1712 1713 static void 1714 db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent) 1715 { 1716 char faddr_str[48], laddr_str[48]; 1717 1718 db_print_indent(indent); 1719 db_printf("%s at %p\n", name, inc); 1720 1721 indent += 2; 1722 1723 #ifdef INET6 1724 if (inc->inc_flags & INC_ISIPV6) { 1725 /* IPv6. */ 1726 ip6_sprintf(laddr_str, &inc->inc6_laddr); 1727 ip6_sprintf(faddr_str, &inc->inc6_faddr); 1728 } else { 1729 #endif 1730 /* IPv4. */ 1731 inet_ntoa_r(inc->inc_laddr, laddr_str); 1732 inet_ntoa_r(inc->inc_faddr, faddr_str); 1733 #ifdef INET6 1734 } 1735 #endif 1736 db_print_indent(indent); 1737 db_printf("inc_laddr %s inc_lport %u\n", laddr_str, 1738 ntohs(inc->inc_lport)); 1739 db_print_indent(indent); 1740 db_printf("inc_faddr %s inc_fport %u\n", faddr_str, 1741 ntohs(inc->inc_fport)); 1742 } 1743 1744 static void 1745 db_print_inpflags(int inp_flags) 1746 { 1747 int comma; 1748 1749 comma = 0; 1750 if (inp_flags & INP_RECVOPTS) { 1751 db_printf("%sINP_RECVOPTS", comma ? ", " : ""); 1752 comma = 1; 1753 } 1754 if (inp_flags & INP_RECVRETOPTS) { 1755 db_printf("%sINP_RECVRETOPTS", comma ? ", " : ""); 1756 comma = 1; 1757 } 1758 if (inp_flags & INP_RECVDSTADDR) { 1759 db_printf("%sINP_RECVDSTADDR", comma ? ", " : ""); 1760 comma = 1; 1761 } 1762 if (inp_flags & INP_HDRINCL) { 1763 db_printf("%sINP_HDRINCL", comma ? ", " : ""); 1764 comma = 1; 1765 } 1766 if (inp_flags & INP_HIGHPORT) { 1767 db_printf("%sINP_HIGHPORT", comma ? ", " : ""); 1768 comma = 1; 1769 } 1770 if (inp_flags & INP_LOWPORT) { 1771 db_printf("%sINP_LOWPORT", comma ? ", " : ""); 1772 comma = 1; 1773 } 1774 if (inp_flags & INP_ANONPORT) { 1775 db_printf("%sINP_ANONPORT", comma ? ", " : ""); 1776 comma = 1; 1777 } 1778 if (inp_flags & INP_RECVIF) { 1779 db_printf("%sINP_RECVIF", comma ? ", " : ""); 1780 comma = 1; 1781 } 1782 if (inp_flags & INP_MTUDISC) { 1783 db_printf("%sINP_MTUDISC", comma ? ", " : ""); 1784 comma = 1; 1785 } 1786 if (inp_flags & INP_FAITH) { 1787 db_printf("%sINP_FAITH", comma ? ", " : ""); 1788 comma = 1; 1789 } 1790 if (inp_flags & INP_RECVTTL) { 1791 db_printf("%sINP_RECVTTL", comma ? ", " : ""); 1792 comma = 1; 1793 } 1794 if (inp_flags & INP_DONTFRAG) { 1795 db_printf("%sINP_DONTFRAG", comma ? ", " : ""); 1796 comma = 1; 1797 } 1798 if (inp_flags & IN6P_IPV6_V6ONLY) { 1799 db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : ""); 1800 comma = 1; 1801 } 1802 if (inp_flags & IN6P_PKTINFO) { 1803 db_printf("%sIN6P_PKTINFO", comma ? ", " : ""); 1804 comma = 1; 1805 } 1806 if (inp_flags & IN6P_HOPLIMIT) { 1807 db_printf("%sIN6P_HOPLIMIT", comma ? ", " : ""); 1808 comma = 1; 1809 } 1810 if (inp_flags & IN6P_HOPOPTS) { 1811 db_printf("%sIN6P_HOPOPTS", comma ? ", " : ""); 1812 comma = 1; 1813 } 1814 if (inp_flags & IN6P_DSTOPTS) { 1815 db_printf("%sIN6P_DSTOPTS", comma ? ", " : ""); 1816 comma = 1; 1817 } 1818 if (inp_flags & IN6P_RTHDR) { 1819 db_printf("%sIN6P_RTHDR", comma ? ", " : ""); 1820 comma = 1; 1821 } 1822 if (inp_flags & IN6P_RTHDRDSTOPTS) { 1823 db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : ""); 1824 comma = 1; 1825 } 1826 if (inp_flags & IN6P_TCLASS) { 1827 db_printf("%sIN6P_TCLASS", comma ? ", " : ""); 1828 comma = 1; 1829 } 1830 if (inp_flags & IN6P_AUTOFLOWLABEL) { 1831 db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : ""); 1832 comma = 1; 1833 } 1834 if (inp_flags & INP_TIMEWAIT) { 1835 db_printf("%sINP_TIMEWAIT", comma ? ", " : ""); 1836 comma = 1; 1837 } 1838 if (inp_flags & INP_ONESBCAST) { 1839 db_printf("%sINP_ONESBCAST", comma ? ", " : ""); 1840 comma = 1; 1841 } 1842 if (inp_flags & INP_DROPPED) { 1843 db_printf("%sINP_DROPPED", comma ? ", " : ""); 1844 comma = 1; 1845 } 1846 if (inp_flags & INP_SOCKREF) { 1847 db_printf("%sINP_SOCKREF", comma ? ", " : ""); 1848 comma = 1; 1849 } 1850 if (inp_flags & IN6P_RFC2292) { 1851 db_printf("%sIN6P_RFC2292", comma ? ", " : ""); 1852 comma = 1; 1853 } 1854 if (inp_flags & IN6P_MTU) { 1855 db_printf("IN6P_MTU%s", comma ? ", " : ""); 1856 comma = 1; 1857 } 1858 } 1859 1860 static void 1861 db_print_inpvflag(u_char inp_vflag) 1862 { 1863 int comma; 1864 1865 comma = 0; 1866 if (inp_vflag & INP_IPV4) { 1867 db_printf("%sINP_IPV4", comma ? ", " : ""); 1868 comma = 1; 1869 } 1870 if (inp_vflag & INP_IPV6) { 1871 db_printf("%sINP_IPV6", comma ? ", " : ""); 1872 comma = 1; 1873 } 1874 if (inp_vflag & INP_IPV6PROTO) { 1875 db_printf("%sINP_IPV6PROTO", comma ? ", " : ""); 1876 comma = 1; 1877 } 1878 } 1879 1880 static void 1881 db_print_inpcb(struct inpcb *inp, const char *name, int indent) 1882 { 1883 1884 db_print_indent(indent); 1885 db_printf("%s at %p\n", name, inp); 1886 1887 indent += 2; 1888 1889 db_print_indent(indent); 1890 db_printf("inp_flow: 0x%x\n", inp->inp_flow); 1891 1892 db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent); 1893 1894 db_print_indent(indent); 1895 db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n", 1896 inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket); 1897 1898 db_print_indent(indent); 1899 db_printf("inp_label: %p inp_flags: 0x%x (", 1900 inp->inp_label, inp->inp_flags); 1901 db_print_inpflags(inp->inp_flags); 1902 db_printf(")\n"); 1903 1904 db_print_indent(indent); 1905 db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp, 1906 inp->inp_vflag); 1907 db_print_inpvflag(inp->inp_vflag); 1908 db_printf(")\n"); 1909 1910 db_print_indent(indent); 1911 db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n", 1912 inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl); 1913 1914 db_print_indent(indent); 1915 #ifdef INET6 1916 if (inp->inp_vflag & INP_IPV6) { 1917 db_printf("in6p_options: %p in6p_outputopts: %p " 1918 "in6p_moptions: %p\n", inp->in6p_options, 1919 inp->in6p_outputopts, inp->in6p_moptions); 1920 db_printf("in6p_icmp6filt: %p in6p_cksum %d " 1921 "in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum, 1922 inp->in6p_hops); 1923 } else 1924 #endif 1925 { 1926 db_printf("inp_ip_tos: %d inp_ip_options: %p " 1927 "inp_ip_moptions: %p\n", inp->inp_ip_tos, 1928 inp->inp_options, inp->inp_moptions); 1929 } 1930 1931 db_print_indent(indent); 1932 db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd, 1933 (uintmax_t)inp->inp_gencnt); 1934 } 1935 1936 DB_SHOW_COMMAND(inpcb, db_show_inpcb) 1937 { 1938 struct inpcb *inp; 1939 1940 if (!have_addr) { 1941 db_printf("usage: show inpcb <addr>\n"); 1942 return; 1943 } 1944 inp = (struct inpcb *)addr; 1945 1946 db_print_inpcb(inp, "inpcb", 0); 1947 } 1948 #endif 1949