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 1.44 2007/12/19 11:10:42 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/jail.h> 84 #include <sys/kernel.h> 85 #include <sys/sysctl.h> 86 #include <sys/thread2.h> 87 88 #include <machine/limits.h> 89 90 #include <vm/vm_zone.h> 91 92 #include <net/if.h> 93 #include <net/if_types.h> 94 #include <net/route.h> 95 96 #include <netinet/in.h> 97 #include <netinet/in_pcb.h> 98 #include <netinet/in_var.h> 99 #include <netinet/ip_var.h> 100 #ifdef INET6 101 #include <netinet/ip6.h> 102 #include <netinet6/ip6_var.h> 103 #endif /* INET6 */ 104 105 #ifdef IPSEC 106 #include <netinet6/ipsec.h> 107 #include <netproto/key/key.h> 108 #endif 109 110 #ifdef FAST_IPSEC 111 #if defined(IPSEC) || defined(IPSEC_ESP) 112 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!" 113 #endif 114 115 #include <netproto/ipsec/ipsec.h> 116 #include <netproto/ipsec/key.h> 117 #define IPSEC 118 #endif /* FAST_IPSEC */ 119 120 struct in_addr zeroin_addr; 121 122 /* 123 * These configure the range of local port addresses assigned to 124 * "unspecified" outgoing connections/packets/whatever. 125 */ 126 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */ 127 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */ 128 129 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */ 130 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */ 131 132 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */ 133 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */ 134 135 static __inline void 136 RANGECHK(int var, int min, int max) 137 { 138 if (var < min) 139 var = min; 140 else if (var > max) 141 var = max; 142 } 143 144 static int 145 sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS) 146 { 147 int error; 148 149 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req); 150 if (!error) { 151 RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1); 152 RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1); 153 154 RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX); 155 RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX); 156 157 RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX); 158 RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX); 159 } 160 return (error); 161 } 162 163 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); 164 165 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW, 166 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", ""); 167 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW, 168 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", ""); 169 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW, 170 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", ""); 171 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW, 172 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", ""); 173 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW, 174 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", ""); 175 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW, 176 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", ""); 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 from 182 * a critical section. XXX - There are, unfortunately, a few exceptions 183 * to this rule that should be fixed. 184 * 185 * NOTE: The caller should initialize the cpu field to the cpu running the 186 * protocol stack associated with this inpcbinfo. 187 */ 188 189 void 190 in_pcbinfo_init(struct inpcbinfo *pcbinfo) 191 { 192 LIST_INIT(&pcbinfo->pcblisthead); 193 pcbinfo->cpu = -1; 194 } 195 196 /* 197 * Allocate a PCB and associate it with the socket. 198 */ 199 int 200 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo) 201 { 202 struct inpcb *inp; 203 #ifdef IPSEC 204 int error; 205 #endif 206 207 inp = zalloc(pcbinfo->ipi_zone); 208 if (inp == NULL) 209 return (ENOBUFS); 210 bzero(inp, sizeof *inp); 211 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 212 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo; 213 inp->inp_socket = so; 214 #ifdef IPSEC 215 error = ipsec_init_policy(so, &inp->inp_sp); 216 if (error != 0) { 217 zfree(pcbinfo->ipi_zone, inp); 218 return (error); 219 } 220 #endif 221 #ifdef INET6 222 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only) 223 inp->inp_flags |= IN6P_IPV6_V6ONLY; 224 if (ip6_auto_flowlabel) 225 inp->inp_flags |= IN6P_AUTOFLOWLABEL; 226 #endif 227 so->so_pcb = inp; 228 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list); 229 pcbinfo->ipi_count++; 230 return (0); 231 } 232 233 int 234 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 235 { 236 struct socket *so = inp->inp_socket; 237 struct proc *p = td->td_proc; 238 unsigned short *lastport; 239 struct sockaddr_in *sin; 240 struct sockaddr_in jsin; 241 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 242 struct ucred *cred = NULL; 243 u_short lport = 0; 244 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 245 int error; 246 247 KKASSERT(p); 248 249 if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */ 250 return (EADDRNOTAVAIL); 251 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) 252 return (EINVAL); /* already bound */ 253 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT))) 254 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */ 255 if (p) 256 cred = p->p_ucred; 257 if (nam != NULL) { 258 sin = (struct sockaddr_in *)nam; 259 if (nam->sa_len != sizeof *sin) 260 return (EINVAL); 261 #ifdef notdef 262 /* 263 * We should check the family, but old programs 264 * incorrectly fail to initialize it. 265 */ 266 if (sin->sin_family != AF_INET) 267 return (EAFNOSUPPORT); 268 #endif 269 if (!prison_replace_wildcards(td, nam)) 270 return (EINVAL); 271 lport = sin->sin_port; 272 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 273 /* 274 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 275 * allow complete duplication of binding if 276 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 277 * and a multicast address is bound on both 278 * new and duplicated sockets. 279 */ 280 if (so->so_options & SO_REUSEADDR) 281 reuseport = SO_REUSEADDR | SO_REUSEPORT; 282 } else if (sin->sin_addr.s_addr != INADDR_ANY) { 283 sin->sin_port = 0; /* yech... */ 284 bzero(&sin->sin_zero, sizeof sin->sin_zero); 285 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL) 286 return (EADDRNOTAVAIL); 287 } 288 if (lport != 0) { 289 struct inpcb *t; 290 291 /* GROSS */ 292 if (ntohs(lport) < IPPORT_RESERVED && 293 cred && suser_cred(cred, PRISON_ROOT)) 294 return (EACCES); 295 if (so->so_cred->cr_uid != 0 && 296 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 297 t = in_pcblookup_local(inp->inp_pcbinfo, 298 sin->sin_addr, lport, 299 INPLOOKUP_WILDCARD, cred); 300 if (t && 301 (!in_nullhost(sin->sin_addr) || 302 !in_nullhost(t->inp_laddr) || 303 (t->inp_socket->so_options & 304 SO_REUSEPORT) == 0) && 305 (so->so_cred->cr_uid != 306 t->inp_socket->so_cred->cr_uid)) { 307 #ifdef INET6 308 if (!in_nullhost(sin->sin_addr) || 309 !in_nullhost(t->inp_laddr) || 310 INP_SOCKAF(so) == 311 INP_SOCKAF(t->inp_socket)) 312 #endif 313 return (EADDRINUSE); 314 } 315 } 316 if (cred && !prison_replace_wildcards(td, nam)) 317 return (EADDRNOTAVAIL); 318 t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport, 319 wild, cred); 320 if (t && !(reuseport & t->inp_socket->so_options)) { 321 #ifdef INET6 322 if (!in_nullhost(sin->sin_addr) || 323 !in_nullhost(t->inp_laddr) || 324 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket)) 325 #endif 326 return (EADDRINUSE); 327 } 328 } 329 inp->inp_laddr = sin->sin_addr; 330 } 331 if (lport == 0) { 332 ushort first, last; 333 int count; 334 335 jsin.sin_family = AF_INET; 336 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 337 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) { 338 inp->inp_laddr.s_addr = INADDR_ANY; 339 return (EINVAL); 340 } 341 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 342 343 inp->inp_flags |= INP_ANONPORT; 344 345 if (inp->inp_flags & INP_HIGHPORT) { 346 first = ipport_hifirstauto; /* sysctl */ 347 last = ipport_hilastauto; 348 lastport = &pcbinfo->lasthi; 349 } else if (inp->inp_flags & INP_LOWPORT) { 350 if (cred && 351 (error = suser_cred(cred, PRISON_ROOT))) { 352 inp->inp_laddr.s_addr = INADDR_ANY; 353 return (error); 354 } 355 first = ipport_lowfirstauto; /* 1023 */ 356 last = ipport_lowlastauto; /* 600 */ 357 lastport = &pcbinfo->lastlow; 358 } else { 359 first = ipport_firstauto; /* sysctl */ 360 last = ipport_lastauto; 361 lastport = &pcbinfo->lastport; 362 } 363 /* 364 * Simple check to ensure all ports are not used up causing 365 * a deadlock here. 366 * 367 * We split the two cases (up and down) so that the direction 368 * is not being tested on each round of the loop. 369 */ 370 if (first > last) { 371 /* 372 * counting down 373 */ 374 count = first - last; 375 376 do { 377 if (count-- < 0) { /* completely used? */ 378 inp->inp_laddr.s_addr = INADDR_ANY; 379 return (EADDRNOTAVAIL); 380 } 381 --*lastport; 382 if (*lastport > first || *lastport < last) 383 *lastport = first; 384 lport = htons(*lastport); 385 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 386 lport, wild, cred)); 387 } else { 388 /* 389 * counting up 390 */ 391 count = last - first; 392 393 do { 394 if (count-- < 0) { /* completely used? */ 395 inp->inp_laddr.s_addr = INADDR_ANY; 396 return (EADDRNOTAVAIL); 397 } 398 ++*lastport; 399 if (*lastport < first || *lastport > last) 400 *lastport = first; 401 lport = htons(*lastport); 402 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 403 lport, wild, cred)); 404 } 405 } 406 inp->inp_lport = lport; 407 408 jsin.sin_family = AF_INET; 409 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 410 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) { 411 inp->inp_laddr.s_addr = INADDR_ANY; 412 inp->inp_lport = 0; 413 return (EINVAL); 414 } 415 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 416 417 if (in_pcbinsporthash(inp) != 0) { 418 inp->inp_laddr.s_addr = INADDR_ANY; 419 inp->inp_lport = 0; 420 return (EAGAIN); 421 } 422 return (0); 423 } 424 425 /* 426 * Transform old in_pcbconnect() into an inner subroutine for new 427 * in_pcbconnect(): Do some validity-checking on the remote 428 * address (in mbuf 'nam') and then determine local host address 429 * (i.e., which interface) to use to access that remote host. 430 * 431 * This preserves definition of in_pcbconnect(), while supporting a 432 * slightly different version for T/TCP. (This is more than 433 * a bit of a kludge, but cleaning up the internal interfaces would 434 * have forced minor changes in every protocol). 435 */ 436 int 437 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 438 struct sockaddr_in **plocal_sin, struct thread *td) 439 { 440 struct in_ifaddr *ia; 441 struct ucred *cred = NULL; 442 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 443 struct sockaddr *jsin; 444 int jailed = 0; 445 446 if (nam->sa_len != sizeof *sin) 447 return (EINVAL); 448 if (sin->sin_family != AF_INET) 449 return (EAFNOSUPPORT); 450 if (sin->sin_port == 0) 451 return (EADDRNOTAVAIL); 452 if (td && td->td_proc && td->td_proc->p_ucred) 453 cred = td->td_proc->p_ucred; 454 if (cred && cred->cr_prison) 455 jailed = 1; 456 if (!TAILQ_EMPTY(&in_ifaddrhead)) { 457 ia = TAILQ_FIRST(&in_ifaddrhead); 458 /* 459 * If the destination address is INADDR_ANY, 460 * use the primary local address. 461 * If the supplied address is INADDR_BROADCAST, 462 * and the primary interface supports broadcast, 463 * choose the broadcast address for that interface. 464 */ 465 if (sin->sin_addr.s_addr == INADDR_ANY) 466 sin->sin_addr = IA_SIN(ia)->sin_addr; 467 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST && 468 (ia->ia_ifp->if_flags & IFF_BROADCAST)) 469 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr; 470 } 471 if (inp->inp_laddr.s_addr == INADDR_ANY) { 472 struct route *ro; 473 474 ia = (struct in_ifaddr *)NULL; 475 /* 476 * If route is known or can be allocated now, 477 * our src addr is taken from the i/f, else punt. 478 * Note that we should check the address family of the cached 479 * destination, in case of sharing the cache with IPv6. 480 */ 481 ro = &inp->inp_route; 482 if (ro->ro_rt && 483 (!(ro->ro_rt->rt_flags & RTF_UP) || 484 ro->ro_dst.sa_family != AF_INET || 485 satosin(&ro->ro_dst)->sin_addr.s_addr != 486 sin->sin_addr.s_addr || 487 inp->inp_socket->so_options & SO_DONTROUTE)) { 488 RTFREE(ro->ro_rt); 489 ro->ro_rt = (struct rtentry *)NULL; 490 } 491 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/ 492 (ro->ro_rt == (struct rtentry *)NULL || 493 ro->ro_rt->rt_ifp == (struct ifnet *)NULL)) { 494 /* No route yet, so try to acquire one */ 495 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 496 ro->ro_dst.sa_family = AF_INET; 497 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 498 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = 499 sin->sin_addr; 500 rtalloc(ro); 501 } 502 /* 503 * If we found a route, use the address 504 * corresponding to the outgoing interface 505 * unless it is the loopback (in case a route 506 * to our address on another net goes to loopback). 507 */ 508 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) { 509 if (jailed) { 510 if (jailed_ip(cred->cr_prison, 511 ro->ro_rt->rt_ifa->ifa_addr)) { 512 ia = ifatoia(ro->ro_rt->rt_ifa); 513 } 514 } else { 515 ia = ifatoia(ro->ro_rt->rt_ifa); 516 } 517 } 518 if (ia == NULL) { 519 u_short fport = sin->sin_port; 520 521 sin->sin_port = 0; 522 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin))); 523 if (ia && jailed && !jailed_ip(cred->cr_prison, 524 sintosa(&ia->ia_addr))) 525 ia = NULL; 526 if (ia == NULL) 527 ia = ifatoia(ifa_ifwithnet(sintosa(sin))); 528 if (ia && jailed && !jailed_ip(cred->cr_prison, 529 sintosa(&ia->ia_addr))) 530 ia = NULL; 531 sin->sin_port = fport; 532 if (ia == NULL) 533 ia = TAILQ_FIRST(&in_ifaddrhead); 534 if (ia && jailed && !jailed_ip(cred->cr_prison, 535 sintosa(&ia->ia_addr))) 536 ia = NULL; 537 538 if (!jailed && ia == NULL) 539 return (EADDRNOTAVAIL); 540 } 541 /* 542 * If the destination address is multicast and an outgoing 543 * interface has been set as a multicast option, use the 544 * address of that interface as our source address. 545 */ 546 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && 547 inp->inp_moptions != NULL) { 548 struct ip_moptions *imo; 549 struct ifnet *ifp; 550 551 imo = inp->inp_moptions; 552 if (imo->imo_multicast_ifp != NULL) { 553 ifp = imo->imo_multicast_ifp; 554 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) 555 if (ia->ia_ifp == ifp) 556 break; 557 if (ia == NULL) 558 return (EADDRNOTAVAIL); 559 } 560 } 561 /* 562 * Don't do pcblookup call here; return interface in plocal_sin 563 * and exit to caller, that will do the lookup. 564 */ 565 if (ia == NULL && jailed) { 566 if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL || 567 (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) 568 *plocal_sin = satosin(jsin); 569 else 570 /* IPv6 only Jail */ 571 return (EADDRNOTAVAIL); 572 } else { 573 *plocal_sin = &ia->ia_addr; 574 } 575 } 576 return (0); 577 } 578 579 /* 580 * Outer subroutine: 581 * Connect from a socket to a specified address. 582 * Both address and port must be specified in argument sin. 583 * If don't have a local address for this socket yet, 584 * then pick one. 585 */ 586 int 587 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 588 { 589 struct sockaddr_in *if_sin; 590 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 591 int error; 592 593 /* Call inner routine to assign local interface address. */ 594 if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0) 595 return (error); 596 597 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port, 598 inp->inp_laddr.s_addr ? inp->inp_laddr : if_sin->sin_addr, 599 inp->inp_lport, FALSE, NULL) != NULL) { 600 return (EADDRINUSE); 601 } 602 if (inp->inp_laddr.s_addr == INADDR_ANY) { 603 if (inp->inp_lport == 0) { 604 error = in_pcbbind(inp, (struct sockaddr *)NULL, td); 605 if (error) 606 return (error); 607 } 608 inp->inp_laddr = if_sin->sin_addr; 609 } 610 inp->inp_faddr = sin->sin_addr; 611 inp->inp_fport = sin->sin_port; 612 in_pcbinsconnhash(inp); 613 return (0); 614 } 615 616 void 617 in_pcbdisconnect(struct inpcb *inp) 618 { 619 620 inp->inp_faddr.s_addr = INADDR_ANY; 621 inp->inp_fport = 0; 622 in_pcbremconnhash(inp); 623 if (inp->inp_socket->so_state & SS_NOFDREF) 624 in_pcbdetach(inp); 625 } 626 627 void 628 in_pcbdetach(struct inpcb *inp) 629 { 630 struct socket *so = inp->inp_socket; 631 struct inpcbinfo *ipi = inp->inp_pcbinfo; 632 633 #ifdef IPSEC 634 ipsec4_delete_pcbpolicy(inp); 635 #endif /*IPSEC*/ 636 inp->inp_gencnt = ++ipi->ipi_gencnt; 637 in_pcbremlists(inp); 638 so->so_pcb = 0; 639 sofree(so); 640 if (inp->inp_options) 641 m_free(inp->inp_options); 642 if (inp->inp_route.ro_rt) 643 rtfree(inp->inp_route.ro_rt); 644 ip_freemoptions(inp->inp_moptions); 645 inp->inp_vflag = 0; 646 zfree(ipi->ipi_zone, inp); 647 } 648 649 /* 650 * The calling convention of in_setsockaddr() and in_setpeeraddr() was 651 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 652 * in struct pr_usrreqs, so that protocols can just reference then directly 653 * without the need for a wrapper function. The socket must have a valid 654 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 655 * except through a kernel programming error, so it is acceptable to panic 656 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 657 * because there actually /is/ a programming error somewhere... XXX) 658 */ 659 int 660 in_setsockaddr(struct socket *so, struct sockaddr **nam) 661 { 662 struct inpcb *inp; 663 struct sockaddr_in *sin; 664 665 /* 666 * Do the malloc first in case it blocks. 667 */ 668 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME, 669 M_WAITOK | M_ZERO); 670 sin->sin_family = AF_INET; 671 sin->sin_len = sizeof *sin; 672 673 crit_enter(); 674 inp = so->so_pcb; 675 if (!inp) { 676 crit_exit(); 677 kfree(sin, M_SONAME); 678 return (ECONNRESET); 679 } 680 sin->sin_port = inp->inp_lport; 681 sin->sin_addr = inp->inp_laddr; 682 crit_exit(); 683 684 *nam = (struct sockaddr *)sin; 685 return (0); 686 } 687 688 int 689 in_setpeeraddr(struct socket *so, struct sockaddr **nam) 690 { 691 struct inpcb *inp; 692 struct sockaddr_in *sin; 693 694 /* 695 * Do the malloc first in case it blocks. 696 */ 697 MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME, 698 M_WAITOK | M_ZERO); 699 sin->sin_family = AF_INET; 700 sin->sin_len = sizeof *sin; 701 702 crit_enter(); 703 inp = so->so_pcb; 704 if (!inp) { 705 crit_exit(); 706 kfree(sin, M_SONAME); 707 return (ECONNRESET); 708 } 709 sin->sin_port = inp->inp_fport; 710 sin->sin_addr = inp->inp_faddr; 711 crit_exit(); 712 713 *nam = (struct sockaddr *)sin; 714 return (0); 715 } 716 717 void 718 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err, 719 void (*notify)(struct inpcb *, int)) 720 { 721 struct inpcb *inp, *ninp; 722 723 /* 724 * note: if INP_PLACEMARKER is set we must ignore the rest of 725 * the structure and skip it. 726 */ 727 crit_enter(); 728 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) { 729 if (inp->inp_flags & INP_PLACEMARKER) 730 continue; 731 #ifdef INET6 732 if (!(inp->inp_vflag & INP_IPV4)) 733 continue; 734 #endif 735 if (inp->inp_faddr.s_addr != faddr.s_addr || 736 inp->inp_socket == NULL) 737 continue; 738 (*notify)(inp, err); /* can remove inp from list! */ 739 } 740 crit_exit(); 741 } 742 743 void 744 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp) 745 { 746 struct inpcb *inp; 747 struct ip_moptions *imo; 748 int i, gap; 749 750 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) { 751 if (inp->inp_flags & INP_PLACEMARKER) 752 continue; 753 imo = inp->inp_moptions; 754 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) { 755 /* 756 * Unselect the outgoing interface if it is being 757 * detached. 758 */ 759 if (imo->imo_multicast_ifp == ifp) 760 imo->imo_multicast_ifp = NULL; 761 762 /* 763 * Drop multicast group membership if we joined 764 * through the interface being detached. 765 */ 766 for (i = 0, gap = 0; i < imo->imo_num_memberships; 767 i++) { 768 if (imo->imo_membership[i]->inm_ifp == ifp) { 769 in_delmulti(imo->imo_membership[i]); 770 gap++; 771 } else if (gap != 0) 772 imo->imo_membership[i - gap] = 773 imo->imo_membership[i]; 774 } 775 imo->imo_num_memberships -= gap; 776 } 777 } 778 } 779 780 /* 781 * Check for alternatives when higher level complains 782 * about service problems. For now, invalidate cached 783 * routing information. If the route was created dynamically 784 * (by a redirect), time to try a default gateway again. 785 */ 786 void 787 in_losing(struct inpcb *inp) 788 { 789 struct rtentry *rt; 790 struct rt_addrinfo rtinfo; 791 792 if ((rt = inp->inp_route.ro_rt)) { 793 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 794 rtinfo.rti_info[RTAX_DST] = rt_key(rt); 795 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 796 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt); 797 rtinfo.rti_flags = rt->rt_flags; 798 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0); 799 if (rt->rt_flags & RTF_DYNAMIC) 800 rtrequest1_global(RTM_DELETE, &rtinfo, NULL, NULL); 801 inp->inp_route.ro_rt = NULL; 802 rtfree(rt); 803 /* 804 * A new route can be allocated 805 * the next time output is attempted. 806 */ 807 } 808 } 809 810 /* 811 * After a routing change, flush old routing 812 * and allocate a (hopefully) better one. 813 */ 814 void 815 in_rtchange(struct inpcb *inp, int err) 816 { 817 if (inp->inp_route.ro_rt) { 818 rtfree(inp->inp_route.ro_rt); 819 inp->inp_route.ro_rt = NULL; 820 /* 821 * A new route can be allocated the next time 822 * output is attempted. 823 */ 824 } 825 } 826 827 /* 828 * Lookup a PCB based on the local address and port. 829 */ 830 struct inpcb * 831 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr, 832 u_int lport_arg, int wild_okay, struct ucred *cred) 833 { 834 struct inpcb *inp; 835 int matchwild = 3, wildcard; 836 u_short lport = lport_arg; 837 838 struct inpcbporthead *porthash; 839 struct inpcbport *phd; 840 struct inpcb *match = NULL; 841 842 /* 843 * Best fit PCB lookup. 844 * 845 * First see if this local port is in use by looking on the 846 * port hash list. 847 */ 848 porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, 849 pcbinfo->porthashmask)]; 850 LIST_FOREACH(phd, porthash, phd_hash) { 851 if (phd->phd_port == lport) 852 break; 853 } 854 if (phd != NULL) { 855 /* 856 * Port is in use by one or more PCBs. Look for best 857 * fit. 858 */ 859 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 860 wildcard = 0; 861 #ifdef INET6 862 if ((inp->inp_vflag & INP_IPV4) == 0) 863 continue; 864 #endif 865 if (inp->inp_faddr.s_addr != INADDR_ANY) 866 wildcard++; 867 if (inp->inp_laddr.s_addr != INADDR_ANY) { 868 if (laddr.s_addr == INADDR_ANY) 869 wildcard++; 870 else if (inp->inp_laddr.s_addr != laddr.s_addr) 871 continue; 872 } else { 873 if (laddr.s_addr != INADDR_ANY) 874 wildcard++; 875 } 876 if (wildcard && !wild_okay) 877 continue; 878 if (wildcard < matchwild && 879 (cred == NULL || 880 cred->cr_prison == 881 inp->inp_socket->so_cred->cr_prison)) { 882 match = inp; 883 matchwild = wildcard; 884 if (matchwild == 0) { 885 break; 886 } 887 } 888 } 889 } 890 return (match); 891 } 892 893 /* 894 * Lookup PCB in hash list. 895 */ 896 struct inpcb * 897 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport_arg, 898 struct in_addr laddr, u_int lport_arg, boolean_t wildcard, 899 struct ifnet *ifp) 900 { 901 struct inpcbhead *head; 902 struct inpcb *inp, *jinp=NULL; 903 u_short fport = fport_arg, lport = lport_arg; 904 905 /* 906 * First look for an exact match. 907 */ 908 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport, 909 laddr.s_addr, lport, pcbinfo->hashmask)]; 910 LIST_FOREACH(inp, head, inp_hash) { 911 #ifdef INET6 912 if (!(inp->inp_vflag & INP_IPV4)) 913 continue; 914 #endif 915 if (in_hosteq(inp->inp_faddr, faddr) && 916 in_hosteq(inp->inp_laddr, laddr) && 917 inp->inp_fport == fport && inp->inp_lport == lport) { 918 /* found */ 919 if (inp->inp_socket == NULL || 920 inp->inp_socket->so_cred->cr_prison == NULL) { 921 return (inp); 922 } else { 923 if (jinp == NULL) 924 jinp = inp; 925 } 926 } 927 } 928 if (jinp != NULL) 929 return (jinp); 930 if (wildcard) { 931 struct inpcb *local_wild = NULL; 932 struct inpcb *jinp_wild = NULL; 933 #ifdef INET6 934 struct inpcb *local_wild_mapped = NULL; 935 #endif 936 struct inpcontainer *ic; 937 struct inpcontainerhead *chead; 938 struct sockaddr_in jsin; 939 struct ucred *cred; 940 941 /* 942 * Order of socket selection: 943 * 1. non-jailed, non-wild. 944 * 2. non-jailed, wild. 945 * 3. jailed, non-wild. 946 * 4. jailed, wild. 947 */ 948 jsin.sin_family = AF_INET; 949 chead = &pcbinfo->wildcardhashbase[ 950 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)]; 951 LIST_FOREACH(ic, chead, ic_list) { 952 inp = ic->ic_inp; 953 jsin.sin_addr.s_addr = laddr.s_addr; 954 #ifdef INET6 955 if (!(inp->inp_vflag & INP_IPV4)) 956 continue; 957 #endif 958 if (inp->inp_socket != NULL) 959 cred = inp->inp_socket->so_cred; 960 else 961 cred = NULL; 962 if (cred != NULL && jailed(cred)) { 963 if (jinp != NULL) 964 continue; 965 else 966 if (!jailed_ip(cred->cr_prison, 967 (struct sockaddr *)&jsin)) 968 continue; 969 } 970 if (inp->inp_lport == lport) { 971 if (ifp && ifp->if_type == IFT_FAITH && 972 !(inp->inp_flags & INP_FAITH)) 973 continue; 974 if (inp->inp_laddr.s_addr == laddr.s_addr) { 975 if (cred != NULL && jailed(cred)) 976 jinp = inp; 977 else 978 return (inp); 979 } 980 if (inp->inp_laddr.s_addr == INADDR_ANY) { 981 #ifdef INET6 982 if (INP_CHECK_SOCKAF(inp->inp_socket, 983 AF_INET6)) 984 local_wild_mapped = inp; 985 else 986 #endif 987 if (cred != NULL && 988 jailed(cred)) 989 jinp_wild = inp; 990 else 991 local_wild = inp; 992 } 993 } 994 } 995 if (local_wild != NULL) 996 return (local_wild); 997 #ifdef INET6 998 if (local_wild_mapped != NULL) 999 return (local_wild_mapped); 1000 #endif 1001 if (jinp != NULL) 1002 return (jinp); 1003 return (jinp_wild); 1004 } 1005 1006 /* 1007 * Not found. 1008 */ 1009 return (NULL); 1010 } 1011 1012 /* 1013 * Insert PCB into connection hash table. 1014 */ 1015 void 1016 in_pcbinsconnhash(struct inpcb *inp) 1017 { 1018 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo; 1019 struct inpcbhead *bucket; 1020 u_int32_t hashkey_faddr, hashkey_laddr; 1021 1022 #ifdef INET6 1023 if (inp->inp_vflag & INP_IPV6) { 1024 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */; 1025 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */; 1026 } else { 1027 #endif 1028 hashkey_faddr = inp->inp_faddr.s_addr; 1029 hashkey_laddr = inp->inp_laddr.s_addr; 1030 #ifdef INET6 1031 } 1032 #endif 1033 1034 KASSERT(!(inp->inp_flags & INP_CONNECTED), ("already on hash list")); 1035 inp->inp_flags |= INP_CONNECTED; 1036 1037 /* 1038 * Insert into the connection hash table. 1039 */ 1040 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr, 1041 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)]; 1042 LIST_INSERT_HEAD(bucket, inp, inp_hash); 1043 } 1044 1045 /* 1046 * Remove PCB from connection hash table. 1047 */ 1048 void 1049 in_pcbremconnhash(struct inpcb *inp) 1050 { 1051 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected")); 1052 LIST_REMOVE(inp, inp_hash); 1053 inp->inp_flags &= ~INP_CONNECTED; 1054 } 1055 1056 /* 1057 * Insert PCB into port hash table. 1058 */ 1059 int 1060 in_pcbinsporthash(struct inpcb *inp) 1061 { 1062 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1063 struct inpcbporthead *pcbporthash; 1064 struct inpcbport *phd; 1065 1066 /* 1067 * Insert into the port hash table. 1068 */ 1069 pcbporthash = &pcbinfo->porthashbase[ 1070 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)]; 1071 1072 /* Go through port list and look for a head for this lport. */ 1073 LIST_FOREACH(phd, pcbporthash, phd_hash) 1074 if (phd->phd_port == inp->inp_lport) 1075 break; 1076 1077 /* If none exists, malloc one and tack it on. */ 1078 if (phd == NULL) { 1079 MALLOC(phd, struct inpcbport *, sizeof(struct inpcbport), 1080 M_PCB, M_INTWAIT | M_NULLOK); 1081 if (phd == NULL) 1082 return (ENOBUFS); /* XXX */ 1083 phd->phd_port = inp->inp_lport; 1084 LIST_INIT(&phd->phd_pcblist); 1085 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash); 1086 } 1087 1088 inp->inp_phd = phd; 1089 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist); 1090 1091 return (0); 1092 } 1093 1094 void 1095 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1096 { 1097 struct inpcontainer *ic; 1098 struct inpcontainerhead *bucket; 1099 1100 bucket = &pcbinfo->wildcardhashbase[ 1101 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1102 1103 ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT); 1104 ic->ic_inp = inp; 1105 LIST_INSERT_HEAD(bucket, ic, ic_list); 1106 } 1107 1108 /* 1109 * Insert PCB into wildcard hash table. 1110 */ 1111 void 1112 in_pcbinswildcardhash(struct inpcb *inp) 1113 { 1114 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1115 1116 KKASSERT(pcbinfo != NULL); 1117 1118 in_pcbinswildcardhash_oncpu(inp, pcbinfo); 1119 inp->inp_flags |= INP_WILDCARD; 1120 } 1121 1122 void 1123 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1124 { 1125 struct inpcontainer *ic; 1126 struct inpcontainerhead *head; 1127 1128 /* find bucket */ 1129 head = &pcbinfo->wildcardhashbase[ 1130 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1131 1132 LIST_FOREACH(ic, head, ic_list) { 1133 if (ic->ic_inp == inp) 1134 goto found; 1135 } 1136 return; /* not found! */ 1137 1138 found: 1139 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */ 1140 kfree(ic, M_TEMP); /* deallocate container */ 1141 } 1142 1143 /* 1144 * Remove PCB from wildcard hash table. 1145 */ 1146 void 1147 in_pcbremwildcardhash(struct inpcb *inp) 1148 { 1149 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1150 1151 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard")); 1152 in_pcbremwildcardhash_oncpu(inp, pcbinfo); 1153 inp->inp_flags &= ~INP_WILDCARD; 1154 } 1155 1156 /* 1157 * Remove PCB from various lists. 1158 */ 1159 void 1160 in_pcbremlists(struct inpcb *inp) 1161 { 1162 if (inp->inp_lport) { 1163 struct inpcbport *phd = inp->inp_phd; 1164 1165 LIST_REMOVE(inp, inp_portlist); 1166 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1167 LIST_REMOVE(phd, phd_hash); 1168 kfree(phd, M_PCB); 1169 } 1170 } 1171 if (inp->inp_flags & INP_WILDCARD) { 1172 in_pcbremwildcardhash(inp); 1173 } else if (inp->inp_flags & INP_CONNECTED) { 1174 in_pcbremconnhash(inp); 1175 } 1176 LIST_REMOVE(inp, inp_list); 1177 inp->inp_pcbinfo->ipi_count--; 1178 } 1179 1180 int 1181 prison_xinpcb(struct thread *td, struct inpcb *inp) 1182 { 1183 struct ucred *cr; 1184 1185 if (td->td_proc == NULL) 1186 return (0); 1187 cr = td->td_proc->p_ucred; 1188 if (cr->cr_prison == NULL) 1189 return (0); 1190 if (inp->inp_socket && inp->inp_socket->so_cred && 1191 inp->inp_socket->so_cred->cr_prison && 1192 cr->cr_prison == inp->inp_socket->so_cred->cr_prison) 1193 return (0); 1194 return (1); 1195 } 1196 1197 int 1198 in_pcblist_global(SYSCTL_HANDLER_ARGS) 1199 { 1200 struct inpcbinfo *pcbinfo = arg1; 1201 struct inpcb *inp, *marker; 1202 struct xinpcb xi; 1203 int error, i, n; 1204 inp_gen_t gencnt; 1205 1206 /* 1207 * The process of preparing the TCB list is too time-consuming and 1208 * resource-intensive to repeat twice on every request. 1209 */ 1210 if (req->oldptr == NULL) { 1211 n = pcbinfo->ipi_count; 1212 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb); 1213 return 0; 1214 } 1215 1216 if (req->newptr != NULL) 1217 return EPERM; 1218 1219 /* 1220 * OK, now we're committed to doing something. Re-fetch ipi_count 1221 * after obtaining the generation count. 1222 */ 1223 gencnt = pcbinfo->ipi_gencnt; 1224 n = pcbinfo->ipi_count; 1225 1226 marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO); 1227 marker->inp_flags |= INP_PLACEMARKER; 1228 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 1229 1230 i = 0; 1231 error = 0; 1232 1233 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) { 1234 LIST_REMOVE(marker, inp_list); 1235 LIST_INSERT_AFTER(inp, marker, inp_list); 1236 1237 if (inp->inp_flags & INP_PLACEMARKER) 1238 continue; 1239 if (inp->inp_gencnt > gencnt) 1240 continue; 1241 if (prison_xinpcb(req->td, inp)) 1242 continue; 1243 bzero(&xi, sizeof xi); 1244 xi.xi_len = sizeof xi; 1245 bcopy(inp, &xi.xi_inp, sizeof *inp); 1246 if (inp->inp_socket) 1247 sotoxsocket(inp->inp_socket, &xi.xi_socket); 1248 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0) 1249 break; 1250 ++i; 1251 } 1252 LIST_REMOVE(marker, inp_list); 1253 if (error == 0 && i < n) { 1254 bzero(&xi, sizeof xi); 1255 xi.xi_len = sizeof xi; 1256 while (i < n) { 1257 error = SYSCTL_OUT(req, &xi, sizeof xi); 1258 ++i; 1259 } 1260 } 1261 kfree(marker, M_TEMP); 1262 return(error); 1263 } 1264