1 /* 2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved. 3 * Copyright (c) 2004 The DragonFly Project. All rights reserved. 4 * 5 * This code is derived from software contributed to The DragonFly Project 6 * by Jeffrey M. Hsu. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The DragonFly Project nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific, prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1982, 1986, 1991, 1993, 1995 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 67 * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $ 68 * $DragonFly: src/sys/netinet/in_pcb.c,v 1.48 2008/11/08 03:38:23 sephe Exp $ 69 */ 70 71 #include "opt_ipsec.h" 72 #include "opt_inet6.h" 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/domain.h> 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/proc.h> 83 #include <sys/priv.h> 84 #include <sys/jail.h> 85 #include <sys/kernel.h> 86 #include <sys/sysctl.h> 87 #include <sys/thread2.h> 88 89 #include <machine/limits.h> 90 91 #include <net/if.h> 92 #include <net/if_types.h> 93 #include <net/route.h> 94 95 #include <netinet/in.h> 96 #include <netinet/in_pcb.h> 97 #include <netinet/in_var.h> 98 #include <netinet/ip_var.h> 99 #ifdef INET6 100 #include <netinet/ip6.h> 101 #include <netinet6/ip6_var.h> 102 #endif /* INET6 */ 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #include <netproto/key/key.h> 107 #endif 108 109 #ifdef FAST_IPSEC 110 #if defined(IPSEC) || defined(IPSEC_ESP) 111 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!" 112 #endif 113 114 #include <netproto/ipsec/ipsec.h> 115 #include <netproto/ipsec/key.h> 116 #define IPSEC 117 #endif /* FAST_IPSEC */ 118 119 struct in_addr zeroin_addr; 120 121 /* 122 * These configure the range of local port addresses assigned to 123 * "unspecified" outgoing connections/packets/whatever. 124 */ 125 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */ 126 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */ 127 128 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */ 129 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */ 130 131 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */ 132 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */ 133 134 static __inline void 135 RANGECHK(int var, int min, int max) 136 { 137 if (var < min) 138 var = min; 139 else if (var > max) 140 var = max; 141 } 142 143 static int 144 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS) 145 { 146 int error; 147 148 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req); 149 if (!error) { 150 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1); 151 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1); 152 153 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX); 154 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX); 155 156 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX); 157 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX); 158 } 159 return (error); 160 } 161 162 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); 163 164 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW, 165 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", ""); 166 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW, 167 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", ""); 168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW, 169 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", ""); 170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW, 171 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", ""); 172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW, 173 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", ""); 174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW, 175 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", ""); 176 177 /* 178 * in_pcb.c: manage the Protocol Control Blocks. 179 * 180 * NOTE: It is assumed that most of these functions will be called from 181 * a critical section. XXX - There are, unfortunately, a few exceptions 182 * to this rule that should be fixed. 183 * 184 * NOTE: The caller should initialize the cpu field to the cpu running the 185 * protocol stack associated with this inpcbinfo. 186 */ 187 188 void 189 in_pcbinfo_init(struct inpcbinfo *pcbinfo) 190 { 191 LIST_INIT(&pcbinfo->pcblisthead); 192 pcbinfo->cpu = -1; 193 } 194 195 /* 196 * Allocate a PCB and associate it with the socket. 197 */ 198 int 199 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo) 200 { 201 struct inpcb *inp; 202 #ifdef IPSEC 203 int error; 204 #endif 205 206 inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO); 207 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 208 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo; 209 inp->inp_socket = so; 210 #ifdef IPSEC 211 error = ipsec_init_policy(so, &inp->inp_sp); 212 if (error != 0) { 213 kfree(inp, M_PCB); 214 return (error); 215 } 216 #endif 217 #ifdef INET6 218 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only) 219 inp->inp_flags |= IN6P_IPV6_V6ONLY; 220 if (ip6_auto_flowlabel) 221 inp->inp_flags |= IN6P_AUTOFLOWLABEL; 222 #endif 223 so->so_pcb = inp; 224 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list); 225 pcbinfo->ipi_count++; 226 return (0); 227 } 228 229 int 230 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 231 { 232 struct socket *so = inp->inp_socket; 233 struct proc *p = td->td_proc; 234 unsigned short *lastport; 235 struct sockaddr_in *sin; 236 struct sockaddr_in jsin; 237 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 238 struct ucred *cred = NULL; 239 u_short lport = 0; 240 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 241 int error; 242 243 KKASSERT(p); 244 245 if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */ 246 return (EADDRNOTAVAIL); 247 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) 248 return (EINVAL); /* already bound */ 249 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT))) 250 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */ 251 if (p) 252 cred = p->p_ucred; 253 if (nam != NULL) { 254 sin = (struct sockaddr_in *)nam; 255 if (nam->sa_len != sizeof *sin) 256 return (EINVAL); 257 #ifdef notdef 258 /* 259 * We should check the family, but old programs 260 * incorrectly fail to initialize it. 261 */ 262 if (sin->sin_family != AF_INET) 263 return (EAFNOSUPPORT); 264 #endif 265 if (!prison_replace_wildcards(td, nam)) 266 return (EINVAL); 267 lport = sin->sin_port; 268 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 269 /* 270 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 271 * allow complete duplication of binding if 272 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 273 * and a multicast address is bound on both 274 * new and duplicated sockets. 275 */ 276 if (so->so_options & SO_REUSEADDR) 277 reuseport = SO_REUSEADDR | SO_REUSEPORT; 278 } else if (sin->sin_addr.s_addr != INADDR_ANY) { 279 sin->sin_port = 0; /* yech... */ 280 bzero(&sin->sin_zero, sizeof sin->sin_zero); 281 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL) 282 return (EADDRNOTAVAIL); 283 } 284 if (lport != 0) { 285 struct inpcb *t; 286 287 /* GROSS */ 288 if (ntohs(lport) < IPPORT_RESERVED && 289 cred && priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) 290 return (EACCES); 291 if (so->so_cred->cr_uid != 0 && 292 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 293 t = in_pcblookup_local(inp->inp_pcbinfo, 294 sin->sin_addr, lport, 295 INPLOOKUP_WILDCARD, cred); 296 if (t && 297 (!in_nullhost(sin->sin_addr) || 298 !in_nullhost(t->inp_laddr) || 299 (t->inp_socket->so_options & 300 SO_REUSEPORT) == 0) && 301 (so->so_cred->cr_uid != 302 t->inp_socket->so_cred->cr_uid)) { 303 #ifdef INET6 304 if (!in_nullhost(sin->sin_addr) || 305 !in_nullhost(t->inp_laddr) || 306 INP_SOCKAF(so) == 307 INP_SOCKAF(t->inp_socket)) 308 #endif 309 return (EADDRINUSE); 310 } 311 } 312 if (cred && !prison_replace_wildcards(td, nam)) 313 return (EADDRNOTAVAIL); 314 t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport, 315 wild, cred); 316 if (t && !(reuseport & t->inp_socket->so_options)) { 317 #ifdef INET6 318 if (!in_nullhost(sin->sin_addr) || 319 !in_nullhost(t->inp_laddr) || 320 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket)) 321 #endif 322 return (EADDRINUSE); 323 } 324 } 325 inp->inp_laddr = sin->sin_addr; 326 } 327 if (lport == 0) { 328 ushort first, last; 329 int count; 330 331 jsin.sin_family = AF_INET; 332 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 333 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) { 334 inp->inp_laddr.s_addr = INADDR_ANY; 335 return (EINVAL); 336 } 337 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 338 339 inp->inp_flags |= INP_ANONPORT; 340 341 if (inp->inp_flags & INP_HIGHPORT) { 342 first = ipport_hifirstauto; /* sysctl */ 343 last = ipport_hilastauto; 344 lastport = &pcbinfo->lasthi; 345 } else if (inp->inp_flags & INP_LOWPORT) { 346 if (cred && 347 (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) { 348 inp->inp_laddr.s_addr = INADDR_ANY; 349 return (error); 350 } 351 first = ipport_lowfirstauto; /* 1023 */ 352 last = ipport_lowlastauto; /* 600 */ 353 lastport = &pcbinfo->lastlow; 354 } else { 355 first = ipport_firstauto; /* sysctl */ 356 last = ipport_lastauto; 357 lastport = &pcbinfo->lastport; 358 } 359 /* 360 * Simple check to ensure all ports are not used up causing 361 * a deadlock here. 362 * 363 * We split the two cases (up and down) so that the direction 364 * is not being tested on each round of the loop. 365 */ 366 if (first > last) { 367 /* 368 * counting down 369 */ 370 count = first - last; 371 372 do { 373 if (count-- < 0) { /* completely used? */ 374 inp->inp_laddr.s_addr = INADDR_ANY; 375 return (EADDRNOTAVAIL); 376 } 377 --*lastport; 378 if (*lastport > first || *lastport < last) 379 *lastport = first; 380 lport = htons(*lastport); 381 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 382 lport, wild, cred)); 383 } else { 384 /* 385 * counting up 386 */ 387 count = last - first; 388 389 do { 390 if (count-- < 0) { /* completely used? */ 391 inp->inp_laddr.s_addr = INADDR_ANY; 392 return (EADDRNOTAVAIL); 393 } 394 ++*lastport; 395 if (*lastport < first || *lastport > last) 396 *lastport = first; 397 lport = htons(*lastport); 398 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 399 lport, wild, cred)); 400 } 401 } 402 inp->inp_lport = lport; 403 404 jsin.sin_family = AF_INET; 405 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 406 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) { 407 inp->inp_laddr.s_addr = INADDR_ANY; 408 inp->inp_lport = 0; 409 return (EINVAL); 410 } 411 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 412 413 if (in_pcbinsporthash(inp) != 0) { 414 inp->inp_laddr.s_addr = INADDR_ANY; 415 inp->inp_lport = 0; 416 return (EAGAIN); 417 } 418 return (0); 419 } 420 421 /* 422 * Transform old in_pcbconnect() into an inner subroutine for new 423 * in_pcbconnect(): Do some validity-checking on the remote 424 * address (in mbuf 'nam') and then determine local host address 425 * (i.e., which interface) to use to access that remote host. 426 * 427 * This preserves definition of in_pcbconnect(), while supporting a 428 * slightly different version for T/TCP. (This is more than 429 * a bit of a kludge, but cleaning up the internal interfaces would 430 * have forced minor changes in every protocol). 431 */ 432 int 433 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 434 struct sockaddr_in **plocal_sin, struct thread *td) 435 { 436 struct in_ifaddr *ia; 437 struct ucred *cred = NULL; 438 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 439 struct sockaddr *jsin; 440 int jailed = 0, alloc_route = 0; 441 442 if (nam->sa_len != sizeof *sin) 443 return (EINVAL); 444 if (sin->sin_family != AF_INET) 445 return (EAFNOSUPPORT); 446 if (sin->sin_port == 0) 447 return (EADDRNOTAVAIL); 448 if (td && td->td_proc && td->td_proc->p_ucred) 449 cred = td->td_proc->p_ucred; 450 if (cred && cred->cr_prison) 451 jailed = 1; 452 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) { 453 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia; 454 /* 455 * If the destination address is INADDR_ANY, 456 * use the primary local address. 457 * If the supplied address is INADDR_BROADCAST, 458 * and the primary interface supports broadcast, 459 * choose the broadcast address for that interface. 460 */ 461 if (sin->sin_addr.s_addr == INADDR_ANY) 462 sin->sin_addr = IA_SIN(ia)->sin_addr; 463 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST && 464 (ia->ia_ifp->if_flags & IFF_BROADCAST)) 465 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr; 466 } 467 if (inp->inp_laddr.s_addr == INADDR_ANY) { 468 struct route *ro; 469 470 ia = NULL; 471 /* 472 * If route is known or can be allocated now, 473 * our src addr is taken from the i/f, else punt. 474 * Note that we should check the address family of the cached 475 * destination, in case of sharing the cache with IPv6. 476 */ 477 ro = &inp->inp_route; 478 if (ro->ro_rt && 479 (!(ro->ro_rt->rt_flags & RTF_UP) || 480 ro->ro_dst.sa_family != AF_INET || 481 satosin(&ro->ro_dst)->sin_addr.s_addr != 482 sin->sin_addr.s_addr || 483 inp->inp_socket->so_options & SO_DONTROUTE)) { 484 RTFREE(ro->ro_rt); 485 ro->ro_rt = NULL; 486 } 487 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/ 488 (ro->ro_rt == NULL || 489 ro->ro_rt->rt_ifp == NULL)) { 490 /* No route yet, so try to acquire one */ 491 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 492 ro->ro_dst.sa_family = AF_INET; 493 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 494 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = 495 sin->sin_addr; 496 rtalloc(ro); 497 alloc_route = 1; 498 } 499 /* 500 * If we found a route, use the address 501 * corresponding to the outgoing interface 502 * unless it is the loopback (in case a route 503 * to our address on another net goes to loopback). 504 */ 505 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) { 506 if (jailed) { 507 if (jailed_ip(cred->cr_prison, 508 ro->ro_rt->rt_ifa->ifa_addr)) { 509 ia = ifatoia(ro->ro_rt->rt_ifa); 510 } 511 } else { 512 ia = ifatoia(ro->ro_rt->rt_ifa); 513 } 514 } 515 if (ia == NULL) { 516 u_short fport = sin->sin_port; 517 518 sin->sin_port = 0; 519 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin))); 520 if (ia && jailed && !jailed_ip(cred->cr_prison, 521 sintosa(&ia->ia_addr))) 522 ia = NULL; 523 if (ia == NULL) 524 ia = ifatoia(ifa_ifwithnet(sintosa(sin))); 525 if (ia && jailed && !jailed_ip(cred->cr_prison, 526 sintosa(&ia->ia_addr))) 527 ia = NULL; 528 sin->sin_port = fport; 529 if (ia == NULL && 530 !TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) 531 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia; 532 if (ia && jailed && !jailed_ip(cred->cr_prison, 533 sintosa(&ia->ia_addr))) 534 ia = NULL; 535 536 if (!jailed && ia == NULL) 537 goto fail; 538 } 539 /* 540 * If the destination address is multicast and an outgoing 541 * interface has been set as a multicast option, use the 542 * address of that interface as our source address. 543 */ 544 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && 545 inp->inp_moptions != NULL) { 546 struct ip_moptions *imo; 547 struct ifnet *ifp; 548 549 imo = inp->inp_moptions; 550 if (imo->imo_multicast_ifp != NULL) { 551 struct in_ifaddr_container *iac; 552 553 ifp = imo->imo_multicast_ifp; 554 ia = NULL; 555 TAILQ_FOREACH(iac, 556 &in_ifaddrheads[mycpuid], ia_link) { 557 if (iac->ia->ia_ifp == ifp) { 558 ia = iac->ia; 559 break; 560 } 561 } 562 if (ia == NULL) 563 goto fail; 564 } 565 } 566 /* 567 * Don't do pcblookup call here; return interface in plocal_sin 568 * and exit to caller, that will do the lookup. 569 */ 570 if (ia == NULL && jailed) { 571 if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL || 572 (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) { 573 *plocal_sin = satosin(jsin); 574 } else { 575 /* IPv6 only Jail */ 576 goto fail; 577 } 578 } else { 579 *plocal_sin = &ia->ia_addr; 580 } 581 } 582 return (0); 583 fail: 584 if (alloc_route) { 585 struct route *ro = &inp->inp_route; 586 587 if (ro->ro_rt != NULL) 588 RTFREE(ro->ro_rt); 589 bzero(ro, sizeof(*ro)); 590 } 591 return (EADDRNOTAVAIL); 592 } 593 594 /* 595 * Outer subroutine: 596 * Connect from a socket to a specified address. 597 * Both address and port must be specified in argument sin. 598 * If don't have a local address for this socket yet, 599 * then pick one. 600 */ 601 int 602 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 603 { 604 struct sockaddr_in *if_sin; 605 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 606 int error; 607 608 /* Call inner routine to assign local interface address. */ 609 if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0) 610 return (error); 611 612 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port, 613 inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr, 614 inp->inp_lport, FALSE, NULL) != NULL) { 615 return (EADDRINUSE); 616 } 617 if (inp->inp_laddr.s_addr == INADDR_ANY) { 618 if (inp->inp_lport == 0) { 619 error = in_pcbbind(inp, NULL, td); 620 if (error) 621 return (error); 622 } 623 inp->inp_laddr = if_sin->sin_addr; 624 } 625 inp->inp_faddr = sin->sin_addr; 626 inp->inp_fport = sin->sin_port; 627 in_pcbinsconnhash(inp); 628 return (0); 629 } 630 631 void 632 in_pcbdisconnect(struct inpcb *inp) 633 { 634 635 inp->inp_faddr.s_addr = INADDR_ANY; 636 inp->inp_fport = 0; 637 in_pcbremconnhash(inp); 638 if (inp->inp_socket->so_state & SS_NOFDREF) 639 in_pcbdetach(inp); 640 } 641 642 void 643 in_pcbdetach(struct inpcb *inp) 644 { 645 struct socket *so = inp->inp_socket; 646 struct inpcbinfo *ipi = inp->inp_pcbinfo; 647 648 #ifdef IPSEC 649 ipsec4_delete_pcbpolicy(inp); 650 #endif /*IPSEC*/ 651 inp->inp_gencnt = ++ipi->ipi_gencnt; 652 in_pcbremlists(inp); 653 so->so_pcb = NULL; 654 sofree(so); 655 if (inp->inp_options) 656 m_free(inp->inp_options); 657 if (inp->inp_route.ro_rt) 658 rtfree(inp->inp_route.ro_rt); 659 ip_freemoptions(inp->inp_moptions); 660 inp->inp_vflag = 0; 661 kfree(inp, M_PCB); 662 } 663 664 /* 665 * The calling convention of in_setsockaddr() and in_setpeeraddr() was 666 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 667 * in struct pr_usrreqs, so that protocols can just reference then directly 668 * without the need for a wrapper function. The socket must have a valid 669 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 670 * except through a kernel programming error, so it is acceptable to panic 671 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 672 * because there actually /is/ a programming error somewhere... XXX) 673 */ 674 int 675 in_setsockaddr(struct socket *so, struct sockaddr **nam) 676 { 677 struct inpcb *inp; 678 struct sockaddr_in *sin; 679 680 /* 681 * Do the malloc first in case it blocks. 682 */ 683 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME, 684 M_WAITOK | M_ZERO); 685 sin->sin_family = AF_INET; 686 sin->sin_len = sizeof *sin; 687 688 crit_enter(); 689 inp = so->so_pcb; 690 if (!inp) { 691 crit_exit(); 692 kfree(sin, M_SONAME); 693 return (ECONNRESET); 694 } 695 sin->sin_port = inp->inp_lport; 696 sin->sin_addr = inp->inp_laddr; 697 crit_exit(); 698 699 *nam = (struct sockaddr *)sin; 700 return (0); 701 } 702 703 int 704 in_setpeeraddr(struct socket *so, struct sockaddr **nam) 705 { 706 struct inpcb *inp; 707 struct sockaddr_in *sin; 708 709 /* 710 * Do the malloc first in case it blocks. 711 */ 712 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME, 713 M_WAITOK | M_ZERO); 714 sin->sin_family = AF_INET; 715 sin->sin_len = sizeof *sin; 716 717 crit_enter(); 718 inp = so->so_pcb; 719 if (!inp) { 720 crit_exit(); 721 kfree(sin, M_SONAME); 722 return (ECONNRESET); 723 } 724 sin->sin_port = inp->inp_fport; 725 sin->sin_addr = inp->inp_faddr; 726 crit_exit(); 727 728 *nam = (struct sockaddr *)sin; 729 return (0); 730 } 731 732 void 733 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err, 734 void (*notify)(struct inpcb *, int)) 735 { 736 struct inpcb *inp, *ninp; 737 738 /* 739 * note: if INP_PLACEMARKER is set we must ignore the rest of 740 * the structure and skip it. 741 */ 742 crit_enter(); 743 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) { 744 if (inp->inp_flags & INP_PLACEMARKER) 745 continue; 746 #ifdef INET6 747 if (!(inp->inp_vflag & INP_IPV4)) 748 continue; 749 #endif 750 if (inp->inp_faddr.s_addr != faddr.s_addr || 751 inp->inp_socket == NULL) 752 continue; 753 (*notify)(inp, err); /* can remove inp from list! */ 754 } 755 crit_exit(); 756 } 757 758 void 759 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp) 760 { 761 struct inpcb *inp; 762 struct ip_moptions *imo; 763 int i, gap; 764 765 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) { 766 if (inp->inp_flags & INP_PLACEMARKER) 767 continue; 768 imo = inp->inp_moptions; 769 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) { 770 /* 771 * Unselect the outgoing interface if it is being 772 * detached. 773 */ 774 if (imo->imo_multicast_ifp == ifp) 775 imo->imo_multicast_ifp = NULL; 776 777 /* 778 * Drop multicast group membership if we joined 779 * through the interface being detached. 780 */ 781 for (i = 0, gap = 0; i < imo->imo_num_memberships; 782 i++) { 783 if (imo->imo_membership[i]->inm_ifp == ifp) { 784 in_delmulti(imo->imo_membership[i]); 785 gap++; 786 } else if (gap != 0) 787 imo->imo_membership[i - gap] = 788 imo->imo_membership[i]; 789 } 790 imo->imo_num_memberships -= gap; 791 } 792 } 793 } 794 795 /* 796 * Check for alternatives when higher level complains 797 * about service problems. For now, invalidate cached 798 * routing information. If the route was created dynamically 799 * (by a redirect), time to try a default gateway again. 800 */ 801 void 802 in_losing(struct inpcb *inp) 803 { 804 struct rtentry *rt; 805 struct rt_addrinfo rtinfo; 806 807 if ((rt = inp->inp_route.ro_rt)) { 808 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 809 rtinfo.rti_info[RTAX_DST] = rt_key(rt); 810 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 811 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt); 812 rtinfo.rti_flags = rt->rt_flags; 813 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0); 814 if (rt->rt_flags & RTF_DYNAMIC) 815 rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL); 816 inp->inp_route.ro_rt = NULL; 817 rtfree(rt); 818 /* 819 * A new route can be allocated 820 * the next time output is attempted. 821 */ 822 } 823 } 824 825 /* 826 * After a routing change, flush old routing 827 * and allocate a (hopefully) better one. 828 */ 829 void 830 in_rtchange(struct inpcb *inp, int err) 831 { 832 if (inp->inp_route.ro_rt) { 833 rtfree(inp->inp_route.ro_rt); 834 inp->inp_route.ro_rt = NULL; 835 /* 836 * A new route can be allocated the next time 837 * output is attempted. 838 */ 839 } 840 } 841 842 /* 843 * Lookup a PCB based on the local address and port. 844 */ 845 struct inpcb * 846 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr, 847 u_int lport_arg, int wild_okay, struct ucred *cred) 848 { 849 struct inpcb *inp; 850 int matchwild = 3, wildcard; 851 u_short lport = lport_arg; 852 853 struct inpcbporthead *porthash; 854 struct inpcbport *phd; 855 struct inpcb *match = NULL; 856 857 /* 858 * Best fit PCB lookup. 859 * 860 * First see if this local port is in use by looking on the 861 * port hash list. 862 */ 863 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 864 pcbinfo->porthashmask)]; 865 LIST_FOREACH(phd, porthash, phd_hash) { 866 if (phd->phd_port == lport) 867 break; 868 } 869 if (phd != NULL) { 870 /* 871 * Port is in use by one or more PCBs. Look for best 872 * fit. 873 */ 874 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 875 wildcard = 0; 876 #ifdef INET6 877 if ((inp->inp_vflag & INP_IPV4) == 0) 878 continue; 879 #endif 880 if (inp->inp_faddr.s_addr != INADDR_ANY) 881 wildcard++; 882 if (inp->inp_laddr.s_addr != INADDR_ANY) { 883 if (laddr.s_addr == INADDR_ANY) 884 wildcard++; 885 else if (inp->inp_laddr.s_addr != laddr.s_addr) 886 continue; 887 } else { 888 if (laddr.s_addr != INADDR_ANY) 889 wildcard++; 890 } 891 if (wildcard && !wild_okay) 892 continue; 893 if (wildcard < matchwild && 894 (cred == NULL || 895 cred->cr_prison == 896 inp->inp_socket->so_cred->cr_prison)) { 897 match = inp; 898 matchwild = wildcard; 899 if (matchwild == 0) { 900 break; 901 } 902 } 903 } 904 } 905 return (match); 906 } 907 908 /* 909 * Lookup PCB in hash list. 910 */ 911 struct inpcb * 912 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg, 913 struct in_addr laddr, u_int lport_arg, boolean_t wildcard, 914 struct ifnet *ifp) 915 { 916 struct inpcbhead *head; 917 struct inpcb *inp, *jinp=NULL; 918 u_short fport = fport_arg, lport = lport_arg; 919 920 /* 921 * First look for an exact match. 922 */ 923 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport, 924 laddr.s_addr, lport, pcbinfo->hashmask)]; 925 LIST_FOREACH(inp, head, inp_hash) { 926 #ifdef INET6 927 if (!(inp->inp_vflag & INP_IPV4)) 928 continue; 929 #endif 930 if (in_hosteq(inp->inp_faddr, faddr) && 931 in_hosteq(inp->inp_laddr, laddr) && 932 inp->inp_fport == fport && inp->inp_lport == lport) { 933 /* found */ 934 if (inp->inp_socket == NULL || 935 inp->inp_socket->so_cred->cr_prison == NULL) { 936 return (inp); 937 } else { 938 if (jinp == NULL) 939 jinp = inp; 940 } 941 } 942 } 943 if (jinp != NULL) 944 return (jinp); 945 if (wildcard) { 946 struct inpcb *local_wild = NULL; 947 struct inpcb *jinp_wild = NULL; 948 #ifdef INET6 949 struct inpcb *local_wild_mapped = NULL; 950 #endif 951 struct inpcontainer *ic; 952 struct inpcontainerhead *chead; 953 struct sockaddr_in jsin; 954 struct ucred *cred; 955 956 /* 957 * Order of socket selection: 958 * 1. non-jailed, non-wild. 959 * 2. non-jailed, wild. 960 * 3. jailed, non-wild. 961 * 4. jailed, wild. 962 */ 963 jsin.sin_family = AF_INET; 964 chead = &pcbinfo->wildcardhashbase[ 965 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)]; 966 LIST_FOREACH(ic, chead, ic_list) { 967 inp = ic->ic_inp; 968 jsin.sin_addr.s_addr = laddr.s_addr; 969 #ifdef INET6 970 if (!(inp->inp_vflag & INP_IPV4)) 971 continue; 972 #endif 973 if (inp->inp_socket != NULL) 974 cred = inp->inp_socket->so_cred; 975 else 976 cred = NULL; 977 if (cred != NULL && jailed(cred)) { 978 if (jinp != NULL) 979 continue; 980 else 981 if (!jailed_ip(cred->cr_prison, 982 (struct sockaddr *)&jsin)) 983 continue; 984 } 985 if (inp->inp_lport == lport) { 986 if (ifp && ifp->if_type == IFT_FAITH && 987 !(inp->inp_flags & INP_FAITH)) 988 continue; 989 if (inp->inp_laddr.s_addr == laddr.s_addr) { 990 if (cred != NULL && jailed(cred)) 991 jinp = inp; 992 else 993 return (inp); 994 } 995 if (inp->inp_laddr.s_addr == INADDR_ANY) { 996 #ifdef INET6 997 if (INP_CHECK_SOCKAF(inp->inp_socket, 998 AF_INET6)) 999 local_wild_mapped = inp; 1000 else 1001 #endif 1002 if (cred != NULL && 1003 jailed(cred)) 1004 jinp_wild = inp; 1005 else 1006 local_wild = inp; 1007 } 1008 } 1009 } 1010 if (local_wild != NULL) 1011 return (local_wild); 1012 #ifdef INET6 1013 if (local_wild_mapped != NULL) 1014 return (local_wild_mapped); 1015 #endif 1016 if (jinp != NULL) 1017 return (jinp); 1018 return (jinp_wild); 1019 } 1020 1021 /* 1022 * Not found. 1023 */ 1024 return (NULL); 1025 } 1026 1027 /* 1028 * Insert PCB into connection hash table. 1029 */ 1030 void 1031 in_pcbinsconnhash(struct inpcb *inp) 1032 { 1033 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo; 1034 struct inpcbhead *bucket; 1035 u_int32_t hashkey_faddr, hashkey_laddr; 1036 1037 #ifdef INET6 1038 if (inp->inp_vflag & INP_IPV6) { 1039 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */; 1040 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */; 1041 } else { 1042 #endif 1043 hashkey_faddr = inp->inp_faddr.s_addr; 1044 hashkey_laddr = inp->inp_laddr.s_addr; 1045 #ifdef INET6 1046 } 1047 #endif 1048 1049 KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list")); 1050 inp->inp_flags |= INP_CONNECTED; 1051 1052 /* 1053 * Insert into the connection hash table. 1054 */ 1055 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr, 1056 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)]; 1057 LIST_INSERT_HEAD(bucket, inp, inp_hash); 1058 } 1059 1060 /* 1061 * Remove PCB from connection hash table. 1062 */ 1063 void 1064 in_pcbremconnhash(struct inpcb *inp) 1065 { 1066 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected")); 1067 LIST_REMOVE(inp, inp_hash); 1068 inp->inp_flags &= ~INP_CONNECTED; 1069 } 1070 1071 /* 1072 * Insert PCB into port hash table. 1073 */ 1074 int 1075 in_pcbinsporthash(struct inpcb *inp) 1076 { 1077 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1078 struct inpcbporthead *pcbporthash; 1079 struct inpcbport *phd; 1080 1081 /* 1082 * Insert into the port hash table. 1083 */ 1084 pcbporthash = &pcbinfo->porthashbase[ 1085 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)]; 1086 1087 /* Go through port list and look for a head for this lport. */ 1088 LIST_FOREACH(phd, pcbporthash, phd_hash) 1089 if (phd->phd_port == inp->inp_lport) 1090 break; 1091 1092 /* If none exists, malloc one and tack it on. */ 1093 if (phd == NULL) { 1094 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), 1095 M_PCB, M_INTWAIT | M_NULLOK); 1096 if (phd == NULL) 1097 return (ENOBUFS); /* XXX */ 1098 phd->phd_port = inp->inp_lport; 1099 LIST_INIT(&phd->phd_pcblist); 1100 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash); 1101 } 1102 1103 inp->inp_phd = phd; 1104 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist); 1105 1106 return (0); 1107 } 1108 1109 void 1110 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1111 { 1112 struct inpcontainer *ic; 1113 struct inpcontainerhead *bucket; 1114 1115 bucket = &pcbinfo->wildcardhashbase[ 1116 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1117 1118 ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT); 1119 ic->ic_inp = inp; 1120 LIST_INSERT_HEAD(bucket, ic, ic_list); 1121 } 1122 1123 /* 1124 * Insert PCB into wildcard hash table. 1125 */ 1126 void 1127 in_pcbinswildcardhash(struct inpcb *inp) 1128 { 1129 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1130 1131 KKASSERT(pcbinfo != NULL); 1132 1133 in_pcbinswildcardhash_oncpu(inp, pcbinfo); 1134 inp->inp_flags |= INP_WILDCARD; 1135 } 1136 1137 void 1138 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1139 { 1140 struct inpcontainer *ic; 1141 struct inpcontainerhead *head; 1142 1143 /* find bucket */ 1144 head = &pcbinfo->wildcardhashbase[ 1145 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1146 1147 LIST_FOREACH(ic, head, ic_list) { 1148 if (ic->ic_inp == inp) 1149 goto found; 1150 } 1151 return; /* not found! */ 1152 1153 found: 1154 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */ 1155 kfree(ic, M_TEMP); /* deallocate container */ 1156 } 1157 1158 /* 1159 * Remove PCB from wildcard hash table. 1160 */ 1161 void 1162 in_pcbremwildcardhash(struct inpcb *inp) 1163 { 1164 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1165 1166 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard")); 1167 in_pcbremwildcardhash_oncpu(inp, pcbinfo); 1168 inp->inp_flags &= ~INP_WILDCARD; 1169 } 1170 1171 /* 1172 * Remove PCB from various lists. 1173 */ 1174 void 1175 in_pcbremlists(struct inpcb *inp) 1176 { 1177 if (inp->inp_lport) { 1178 struct inpcbport *phd = inp->inp_phd; 1179 1180 LIST_REMOVE(inp, inp_portlist); 1181 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1182 LIST_REMOVE(phd, phd_hash); 1183 kfree(phd, M_PCB); 1184 } 1185 } 1186 if (inp->inp_flags & INP_WILDCARD) { 1187 in_pcbremwildcardhash(inp); 1188 } else if (inp->inp_flags & INP_CONNECTED) { 1189 in_pcbremconnhash(inp); 1190 } 1191 LIST_REMOVE(inp, inp_list); 1192 inp->inp_pcbinfo->ipi_count--; 1193 } 1194 1195 int 1196 prison_xinpcb(struct thread *td, struct inpcb *inp) 1197 { 1198 struct ucred *cr; 1199 1200 if (td->td_proc == NULL) 1201 return (0); 1202 cr = td->td_proc->p_ucred; 1203 if (cr->cr_prison == NULL) 1204 return (0); 1205 if (inp->inp_socket && inp->inp_socket->so_cred && 1206 inp->inp_socket->so_cred->cr_prison && 1207 cr->cr_prison == inp->inp_socket->so_cred->cr_prison) 1208 return (0); 1209 return (1); 1210 } 1211 1212 int 1213 in_pcblist_global(SYSCTL_HANDLER_ARGS) 1214 { 1215 struct inpcbinfo *pcbinfo = arg1; 1216 struct inpcb *inp, *marker; 1217 struct xinpcb xi; 1218 int error, i, n; 1219 inp_gen_t gencnt; 1220 1221 /* 1222 * The process of preparing the TCB list is too time-consuming and 1223 * resource-intensive to repeat twice on every request. 1224 */ 1225 if (req->oldptr == NULL) { 1226 n = pcbinfo->ipi_count; 1227 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb); 1228 return 0; 1229 } 1230 1231 if (req->newptr != NULL) 1232 return EPERM; 1233 1234 /* 1235 * OK, now we're committed to doing something. Re-fetch ipi_count 1236 * after obtaining the generation count. 1237 */ 1238 gencnt = pcbinfo->ipi_gencnt; 1239 n = pcbinfo->ipi_count; 1240 1241 marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO); 1242 marker->inp_flags |= INP_PLACEMARKER; 1243 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 1244 1245 i = 0; 1246 error = 0; 1247 1248 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) { 1249 LIST_REMOVE(marker, inp_list); 1250 LIST_INSERT_AFTER(inp, marker, inp_list); 1251 1252 if (inp->inp_flags & INP_PLACEMARKER) 1253 continue; 1254 if (inp->inp_gencnt > gencnt) 1255 continue; 1256 if (prison_xinpcb(req->td, inp)) 1257 continue; 1258 bzero(&xi, sizeof xi); 1259 xi.xi_len = sizeof xi; 1260 bcopy(inp, &xi.xi_inp, sizeof *inp); 1261 if (inp->inp_socket) 1262 sotoxsocket(inp->inp_socket, &xi.xi_socket); 1263 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0) 1264 break; 1265 ++i; 1266 } 1267 LIST_REMOVE(marker, inp_list); 1268 if (error == 0 && i < n) { 1269 bzero(&xi, sizeof xi); 1270 xi.xi_len = sizeof xi; 1271 while (i < n) { 1272 error = SYSCTL_OUT(req, &xi, sizeof xi); 1273 ++i; 1274 } 1275 } 1276 kfree(marker, M_TEMP); 1277 return(error); 1278 } 1279