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. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)in_pcb.c 8.4 (Berkeley) 5/24/95 63 * $FreeBSD: src/sys/netinet/in_pcb.c,v 1.59.2.27 2004/01/02 04:06:42 ambrisko Exp $ 64 */ 65 66 #include "opt_ipsec.h" 67 #include "opt_inet6.h" 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/domain.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/proc.h> 78 #include <sys/priv.h> 79 #include <sys/jail.h> 80 #include <sys/kernel.h> 81 #include <sys/sysctl.h> 82 83 #include <sys/thread2.h> 84 #include <sys/socketvar2.h> 85 #include <sys/msgport2.h> 86 87 #include <machine/limits.h> 88 89 #include <net/if.h> 90 #include <net/if_types.h> 91 #include <net/route.h> 92 93 #include <netinet/in.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet/in_var.h> 96 #include <netinet/ip_var.h> 97 #ifdef INET6 98 #include <netinet/ip6.h> 99 #include <netinet6/ip6_var.h> 100 #endif /* INET6 */ 101 102 #ifdef IPSEC 103 #include <netinet6/ipsec.h> 104 #include <netproto/key/key.h> 105 #include <netproto/ipsec/esp_var.h> 106 #endif 107 108 #ifdef FAST_IPSEC 109 #if defined(IPSEC) || defined(IPSEC_ESP) 110 #error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!" 111 #endif 112 113 #include <netproto/ipsec/ipsec.h> 114 #include <netproto/ipsec/key.h> 115 #define IPSEC 116 #endif /* FAST_IPSEC */ 117 118 #define INP_LOCALGROUP_SIZMIN 8 119 #define INP_LOCALGROUP_SIZMAX 256 120 121 struct in_addr zeroin_addr; 122 123 /* 124 * These configure the range of local port addresses assigned to 125 * "unspecified" outgoing connections/packets/whatever. 126 */ 127 int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */ 128 int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */ 129 130 int ipport_firstauto = IPPORT_RESERVED; /* 1024 */ 131 int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */ 132 133 int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */ 134 int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */ 135 136 #define RANGECHK(var, min, max) \ 137 if ((var) < (min)) { (var) = (min); } \ 138 else if ((var) > (max)) { (var) = (max); } 139 140 int udpencap_enable = 1; /* enabled by default */ 141 int udpencap_port = 4500; /* triggers decapsulation */ 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 #undef RANGECHK 163 164 SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports"); 165 166 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW, 167 &ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", ""); 168 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW, 169 &ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", ""); 170 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW, 171 &ipport_firstauto, 0, &sysctl_net_ipport_check, "I", ""); 172 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW, 173 &ipport_lastauto, 0, &sysctl_net_ipport_check, "I", ""); 174 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW, 175 &ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", ""); 176 SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW, 177 &ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", ""); 178 179 /* 180 * in_pcb.c: manage the Protocol Control Blocks. 181 * 182 * NOTE: It is assumed that most of these functions will be called from 183 * a critical section. XXX - There are, unfortunately, a few exceptions 184 * to this rule that should be fixed. 185 * 186 * NOTE: The caller should initialize the cpu field to the cpu running the 187 * protocol stack associated with this inpcbinfo. 188 */ 189 190 void 191 in_pcbinfo_init(struct inpcbinfo *pcbinfo) 192 { 193 LIST_INIT(&pcbinfo->pcblisthead); 194 pcbinfo->cpu = -1; 195 pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave), M_PCB, 196 M_WAITOK | M_ZERO); 197 } 198 199 struct baddynamicports baddynamicports; 200 201 /* 202 * Check if the specified port is invalid for dynamic allocation. 203 */ 204 int 205 in_baddynamic(u_int16_t port, u_int16_t proto) 206 { 207 switch (proto) { 208 case IPPROTO_TCP: 209 return (DP_ISSET(baddynamicports.tcp, port)); 210 case IPPROTO_UDP: 211 #ifdef IPSEC 212 /* Cannot preset this as it is a sysctl */ 213 if (port == udpencap_port) 214 return (1); 215 #endif 216 return (DP_ISSET(baddynamicports.udp, port)); 217 default: 218 return (0); 219 } 220 } 221 222 223 /* 224 * Allocate a PCB and associate it with the socket. 225 */ 226 int 227 in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo) 228 { 229 struct inpcb *inp; 230 #ifdef IPSEC 231 int error; 232 #endif 233 234 inp = kmalloc(pcbinfo->ipi_size, M_PCB, M_WAITOK|M_ZERO|M_NULLOK); 235 if (inp == NULL) 236 return (ENOMEM); 237 inp->inp_gencnt = ++pcbinfo->ipi_gencnt; 238 inp->inp_pcbinfo = inp->inp_cpcbinfo = pcbinfo; 239 inp->inp_socket = so; 240 #ifdef IPSEC 241 error = ipsec_init_policy(so, &inp->inp_sp); 242 if (error != 0) { 243 kfree(inp, M_PCB); 244 return (error); 245 } 246 #endif 247 #ifdef INET6 248 if (INP_SOCKAF(so) == AF_INET6 && ip6_v6only) 249 inp->inp_flags |= IN6P_IPV6_V6ONLY; 250 if (ip6_auto_flowlabel) 251 inp->inp_flags |= IN6P_AUTOFLOWLABEL; 252 #endif 253 soreference(so); 254 so->so_pcb = inp; 255 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list); 256 pcbinfo->ipi_count++; 257 return (0); 258 } 259 260 /* 261 * Unlink a pcb with the intention of moving it to another cpu with a 262 * different pcbinfo. While unlinked nothing should attempt to dereference 263 * inp_pcbinfo, NULL it out so we assert if it does. 264 */ 265 void 266 in_pcbunlink(struct inpcb *inp, struct inpcbinfo *pcbinfo) 267 { 268 KKASSERT(inp->inp_pcbinfo == pcbinfo); 269 270 LIST_REMOVE(inp, inp_list); 271 pcbinfo->ipi_count--; 272 inp->inp_pcbinfo = NULL; 273 } 274 275 /* 276 * Relink a pcb into a new pcbinfo. 277 */ 278 void 279 in_pcblink(struct inpcb *inp, struct inpcbinfo *pcbinfo) 280 { 281 KKASSERT(inp->inp_pcbinfo == NULL); 282 inp->inp_pcbinfo = pcbinfo; 283 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, inp, inp_list); 284 pcbinfo->ipi_count++; 285 } 286 287 int 288 in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 289 { 290 struct socket *so = inp->inp_socket; 291 unsigned short *lastport; 292 struct sockaddr_in *sin; 293 struct sockaddr_in jsin; 294 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 295 struct ucred *cred = NULL; 296 u_short lport = 0; 297 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 298 int error; 299 300 if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */ 301 return (EADDRNOTAVAIL); 302 if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY) 303 return (EINVAL); /* already bound */ 304 305 if (!(so->so_options & (SO_REUSEADDR|SO_REUSEPORT))) 306 wild = 1; /* neither SO_REUSEADDR nor SO_REUSEPORT is set */ 307 if (td->td_proc) 308 cred = td->td_proc->p_ucred; 309 310 /* 311 * This has to be atomic. If the porthash is shared across multiple 312 * protocol threads (aka tcp) then the token will be non-NULL. 313 */ 314 if (pcbinfo->porttoken) 315 lwkt_gettoken(pcbinfo->porttoken); 316 317 if (nam != NULL) { 318 sin = (struct sockaddr_in *)nam; 319 if (nam->sa_len != sizeof *sin) { 320 error = EINVAL; 321 goto done; 322 } 323 #ifdef notdef 324 /* 325 * We should check the family, but old programs 326 * incorrectly fail to initialize it. 327 */ 328 if (sin->sin_family != AF_INET) { 329 error = EAFNOSUPPORT; 330 goto done; 331 } 332 #endif 333 if (!prison_replace_wildcards(td, nam)) { 334 error = EINVAL; 335 goto done; 336 } 337 lport = sin->sin_port; 338 if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 339 /* 340 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 341 * allow complete duplication of binding if 342 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 343 * and a multicast address is bound on both 344 * new and duplicated sockets. 345 */ 346 if (so->so_options & SO_REUSEADDR) 347 reuseport = SO_REUSEADDR | SO_REUSEPORT; 348 } else if (sin->sin_addr.s_addr != INADDR_ANY) { 349 sin->sin_port = 0; /* yech... */ 350 bzero(&sin->sin_zero, sizeof sin->sin_zero); 351 if (ifa_ifwithaddr((struct sockaddr *)sin) == NULL) { 352 error = EADDRNOTAVAIL; 353 goto done; 354 } 355 } 356 if (lport != 0) { 357 struct inpcb *t; 358 359 /* GROSS */ 360 if (ntohs(lport) < IPPORT_RESERVED && 361 cred && 362 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0)) { 363 error = EACCES; 364 goto done; 365 } 366 if (so->so_cred->cr_uid != 0 && 367 !IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 368 t = in_pcblookup_local(pcbinfo, 369 sin->sin_addr, 370 lport, 371 INPLOOKUP_WILDCARD, 372 cred); 373 if (t && 374 (!in_nullhost(sin->sin_addr) || 375 !in_nullhost(t->inp_laddr) || 376 (t->inp_socket->so_options & 377 SO_REUSEPORT) == 0) && 378 (so->so_cred->cr_uid != 379 t->inp_socket->so_cred->cr_uid)) { 380 #ifdef INET6 381 if (!in_nullhost(sin->sin_addr) || 382 !in_nullhost(t->inp_laddr) || 383 INP_SOCKAF(so) == 384 INP_SOCKAF(t->inp_socket)) 385 #endif 386 { 387 error = EADDRINUSE; 388 goto done; 389 } 390 } 391 } 392 if (cred && !prison_replace_wildcards(td, nam)) { 393 error = EADDRNOTAVAIL; 394 goto done; 395 } 396 t = in_pcblookup_local(pcbinfo, sin->sin_addr, lport, 397 wild, cred); 398 if (t && !(reuseport & t->inp_socket->so_options)) { 399 #ifdef INET6 400 if (!in_nullhost(sin->sin_addr) || 401 !in_nullhost(t->inp_laddr) || 402 INP_SOCKAF(so) == INP_SOCKAF(t->inp_socket)) 403 #endif 404 { 405 error = EADDRINUSE; 406 goto done; 407 } 408 } 409 } 410 inp->inp_laddr = sin->sin_addr; 411 } 412 if (lport == 0) { 413 ushort first, last; 414 int count; 415 416 jsin.sin_family = AF_INET; 417 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 418 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) { 419 inp->inp_laddr.s_addr = INADDR_ANY; 420 error = EINVAL; 421 goto done; 422 } 423 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 424 425 inp->inp_flags |= INP_ANONPORT; 426 427 if (inp->inp_flags & INP_HIGHPORT) { 428 first = ipport_hifirstauto; /* sysctl */ 429 last = ipport_hilastauto; 430 lastport = &pcbinfo->lasthi; 431 } else if (inp->inp_flags & INP_LOWPORT) { 432 if (cred && 433 (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) { 434 inp->inp_laddr.s_addr = INADDR_ANY; 435 goto done; 436 } 437 first = ipport_lowfirstauto; /* 1023 */ 438 last = ipport_lowlastauto; /* 600 */ 439 lastport = &pcbinfo->lastlow; 440 } else { 441 first = ipport_firstauto; /* sysctl */ 442 last = ipport_lastauto; 443 lastport = &pcbinfo->lastport; 444 } 445 /* 446 * Simple check to ensure all ports are not used up causing 447 * a deadlock here. 448 * 449 * We split the two cases (up and down) so that the direction 450 * is not being tested on each round of the loop. 451 */ 452 if (first > last) { 453 /* 454 * counting down 455 */ 456 count = first - last; 457 458 do { 459 if (count-- < 0) { /* completely used? */ 460 inp->inp_laddr.s_addr = INADDR_ANY; 461 error = EADDRNOTAVAIL; 462 goto done; 463 } 464 --*lastport; 465 if (*lastport > first || *lastport < last) 466 *lastport = first; 467 lport = htons(*lastport); 468 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 469 lport, wild, cred)); 470 } else { 471 /* 472 * counting up 473 */ 474 count = last - first; 475 476 do { 477 if (count-- < 0) { /* completely used? */ 478 inp->inp_laddr.s_addr = INADDR_ANY; 479 error = EADDRNOTAVAIL; 480 goto done; 481 } 482 ++*lastport; 483 if (*lastport < first || *lastport > last) 484 *lastport = first; 485 lport = htons(*lastport); 486 } while (in_pcblookup_local(pcbinfo, inp->inp_laddr, 487 lport, wild, cred)); 488 } 489 } 490 inp->inp_lport = lport; 491 492 jsin.sin_family = AF_INET; 493 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 494 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) { 495 inp->inp_laddr.s_addr = INADDR_ANY; 496 inp->inp_lport = 0; 497 error = EINVAL; 498 goto done; 499 } 500 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 501 502 if (in_pcbinsporthash(inp) != 0) { 503 inp->inp_laddr.s_addr = INADDR_ANY; 504 inp->inp_lport = 0; 505 error = EAGAIN; 506 goto done; 507 } 508 error = 0; 509 done: 510 if (pcbinfo->porttoken) 511 lwkt_reltoken(pcbinfo->porttoken); 512 return error; 513 } 514 515 static struct inpcb * 516 in_pcblookup_addrport(struct inpcbinfo *pcbinfo, struct in_addr laddr, 517 u_short lport, struct in_addr faddr, u_short fport, struct ucred *cred) 518 { 519 struct inpcb *inp; 520 struct inpcbporthead *porthash; 521 struct inpcbport *phd; 522 struct inpcb *match = NULL; 523 524 /* 525 * If the porthashbase is shared across several cpus we need 526 * to lock. 527 */ 528 if (pcbinfo->porttoken) 529 lwkt_gettoken(pcbinfo->porttoken); 530 531 /* 532 * Best fit PCB lookup. 533 * 534 * First see if this local port is in use by looking on the 535 * port hash list. 536 */ 537 porthash = &pcbinfo->porthashbase[ 538 INP_PCBPORTHASH(lport, pcbinfo->porthashmask)]; 539 LIST_FOREACH(phd, porthash, phd_hash) { 540 if (phd->phd_port == lport) 541 break; 542 } 543 if (phd != NULL) { 544 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 545 #ifdef INET6 546 if ((inp->inp_vflag & INP_IPV4) == 0) 547 continue; 548 #endif 549 if (inp->inp_laddr.s_addr != INADDR_ANY && 550 inp->inp_laddr.s_addr != laddr.s_addr) 551 continue; 552 553 if (inp->inp_faddr.s_addr != INADDR_ANY && 554 inp->inp_faddr.s_addr != faddr.s_addr) 555 continue; 556 557 if (inp->inp_fport != 0 && inp->inp_fport != fport) 558 continue; 559 560 if (cred == NULL || 561 cred->cr_prison == 562 inp->inp_socket->so_cred->cr_prison) { 563 match = inp; 564 break; 565 } 566 } 567 } 568 if (pcbinfo->porttoken) 569 lwkt_reltoken(pcbinfo->porttoken); 570 return (match); 571 } 572 573 int 574 in_pcbconn_bind(struct inpcb *inp, const struct sockaddr *nam, 575 struct thread *td) 576 { 577 struct proc *p = td->td_proc; 578 unsigned short *lastport; 579 const struct sockaddr_in *sin = (const struct sockaddr_in *)nam; 580 struct sockaddr_in jsin; 581 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 582 struct ucred *cred = NULL; 583 u_short lport = 0; 584 ushort first, last; 585 int count, error, dup = 0; 586 587 if (TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) /* XXX broken! */ 588 return (EADDRNOTAVAIL); 589 590 KKASSERT(inp->inp_laddr.s_addr != INADDR_ANY); 591 if (inp->inp_lport != 0) 592 return (EINVAL); /* already bound */ 593 594 KKASSERT(p); 595 cred = p->p_ucred; 596 597 /* 598 * This has to be atomic. If the porthash is shared across multiple 599 * protocol threads (aka tcp) then the token will be non-NULL. 600 */ 601 if (pcbinfo->porttoken) 602 lwkt_gettoken(pcbinfo->porttoken); 603 604 jsin.sin_family = AF_INET; 605 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 606 if (!prison_replace_wildcards(td, (struct sockaddr *)&jsin)) { 607 inp->inp_laddr.s_addr = INADDR_ANY; 608 error = EINVAL; 609 goto done; 610 } 611 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 612 613 inp->inp_flags |= INP_ANONPORT; 614 615 if (inp->inp_flags & INP_HIGHPORT) { 616 first = ipport_hifirstauto; /* sysctl */ 617 last = ipport_hilastauto; 618 lastport = &pcbinfo->lasthi; 619 } else if (inp->inp_flags & INP_LOWPORT) { 620 if (cred && 621 (error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0))) { 622 inp->inp_laddr.s_addr = INADDR_ANY; 623 goto done; 624 } 625 first = ipport_lowfirstauto; /* 1023 */ 626 last = ipport_lowlastauto; /* 600 */ 627 lastport = &pcbinfo->lastlow; 628 } else { 629 first = ipport_firstauto; /* sysctl */ 630 last = ipport_lastauto; 631 lastport = &pcbinfo->lastport; 632 } 633 634 again: 635 /* 636 * Simple check to ensure all ports are not used up causing 637 * a deadlock here. 638 * 639 * We split the two cases (up and down) so that the direction 640 * is not being tested on each round of the loop. 641 */ 642 if (first > last) { 643 /* 644 * counting down 645 */ 646 count = first - last; 647 648 do { 649 if (count-- < 0) { /* completely used? */ 650 inp->inp_laddr.s_addr = INADDR_ANY; 651 error = EADDRNOTAVAIL; 652 goto done; 653 } 654 --*lastport; 655 if (*lastport > first || *lastport < last) 656 *lastport = first; 657 lport = htons(*lastport); 658 } while (in_pcblookup_addrport(pcbinfo, inp->inp_laddr, lport, 659 sin->sin_addr, sin->sin_port, cred)); 660 } else { 661 /* 662 * counting up 663 */ 664 count = last - first; 665 666 do { 667 if (count-- < 0) { /* completely used? */ 668 inp->inp_laddr.s_addr = INADDR_ANY; 669 error = EADDRNOTAVAIL; 670 goto done; 671 } 672 ++*lastport; 673 if (*lastport < first || *lastport > last) 674 *lastport = first; 675 lport = htons(*lastport); 676 } while (in_pcblookup_addrport(pcbinfo, inp->inp_laddr, lport, 677 sin->sin_addr, sin->sin_port, cred)); 678 } 679 680 /* This could happen on loopback interface */ 681 if (sin->sin_port == lport && 682 sin->sin_addr.s_addr == inp->inp_laddr.s_addr) { 683 if (dup) { 684 /* 685 * Duplicate again; give up 686 */ 687 inp->inp_laddr.s_addr = INADDR_ANY; 688 error = EADDRNOTAVAIL; 689 goto done; 690 } 691 dup = 1; 692 goto again; 693 } 694 inp->inp_lport = lport; 695 696 jsin.sin_family = AF_INET; 697 jsin.sin_addr.s_addr = inp->inp_laddr.s_addr; 698 if (!prison_replace_wildcards(td, (struct sockaddr*)&jsin)) { 699 inp->inp_laddr.s_addr = INADDR_ANY; 700 inp->inp_lport = 0; 701 error = EINVAL; 702 goto done; 703 } 704 inp->inp_laddr.s_addr = jsin.sin_addr.s_addr; 705 706 if (in_pcbinsporthash(inp) != 0) { 707 inp->inp_laddr.s_addr = INADDR_ANY; 708 inp->inp_lport = 0; 709 error = EAGAIN; 710 goto done; 711 } 712 error = 0; 713 done: 714 if (pcbinfo->porttoken) 715 lwkt_reltoken(pcbinfo->porttoken); 716 return error; 717 } 718 719 /* 720 * Transform old in_pcbconnect() into an inner subroutine for new 721 * in_pcbconnect(): Do some validity-checking on the remote 722 * address (in mbuf 'nam') and then determine local host address 723 * (i.e., which interface) to use to access that remote host. 724 * 725 * This preserves definition of in_pcbconnect(), while supporting a 726 * slightly different version for T/TCP. (This is more than 727 * a bit of a kludge, but cleaning up the internal interfaces would 728 * have forced minor changes in every protocol). 729 */ 730 int 731 in_pcbladdr_find(struct inpcb *inp, struct sockaddr *nam, 732 struct sockaddr_in **plocal_sin, struct thread *td, int find) 733 { 734 struct in_ifaddr *ia; 735 struct ucred *cred = NULL; 736 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 737 struct sockaddr *jsin; 738 int jailed = 0, alloc_route = 0; 739 740 if (nam->sa_len != sizeof *sin) 741 return (EINVAL); 742 if (sin->sin_family != AF_INET) 743 return (EAFNOSUPPORT); 744 if (sin->sin_port == 0) 745 return (EADDRNOTAVAIL); 746 if (td && td->td_proc && td->td_proc->p_ucred) 747 cred = td->td_proc->p_ucred; 748 if (cred && cred->cr_prison) 749 jailed = 1; 750 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) { 751 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia; 752 /* 753 * If the destination address is INADDR_ANY, 754 * use the primary local address. 755 * If the supplied address is INADDR_BROADCAST, 756 * and the primary interface supports broadcast, 757 * choose the broadcast address for that interface. 758 */ 759 if (sin->sin_addr.s_addr == INADDR_ANY) 760 sin->sin_addr = IA_SIN(ia)->sin_addr; 761 else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST && 762 (ia->ia_ifp->if_flags & IFF_BROADCAST)) 763 sin->sin_addr = satosin(&ia->ia_broadaddr)->sin_addr; 764 } 765 if (find) { 766 struct route *ro; 767 768 ia = NULL; 769 /* 770 * If route is known or can be allocated now, 771 * our src addr is taken from the i/f, else punt. 772 * Note that we should check the address family of the cached 773 * destination, in case of sharing the cache with IPv6. 774 */ 775 ro = &inp->inp_route; 776 if (ro->ro_rt && 777 (!(ro->ro_rt->rt_flags & RTF_UP) || 778 ro->ro_dst.sa_family != AF_INET || 779 satosin(&ro->ro_dst)->sin_addr.s_addr != 780 sin->sin_addr.s_addr || 781 inp->inp_socket->so_options & SO_DONTROUTE)) { 782 RTFREE(ro->ro_rt); 783 ro->ro_rt = NULL; 784 } 785 if (!(inp->inp_socket->so_options & SO_DONTROUTE) && /*XXX*/ 786 (ro->ro_rt == NULL || 787 ro->ro_rt->rt_ifp == NULL)) { 788 /* No route yet, so try to acquire one */ 789 bzero(&ro->ro_dst, sizeof(struct sockaddr_in)); 790 ro->ro_dst.sa_family = AF_INET; 791 ro->ro_dst.sa_len = sizeof(struct sockaddr_in); 792 ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = 793 sin->sin_addr; 794 rtalloc(ro); 795 alloc_route = 1; 796 } 797 /* 798 * If we found a route, use the address 799 * corresponding to the outgoing interface 800 * unless it is the loopback (in case a route 801 * to our address on another net goes to loopback). 802 */ 803 if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK)) { 804 if (jailed) { 805 if (jailed_ip(cred->cr_prison, 806 ro->ro_rt->rt_ifa->ifa_addr)) { 807 ia = ifatoia(ro->ro_rt->rt_ifa); 808 } 809 } else { 810 ia = ifatoia(ro->ro_rt->rt_ifa); 811 } 812 } 813 if (ia == NULL) { 814 u_short fport = sin->sin_port; 815 816 sin->sin_port = 0; 817 ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin))); 818 if (ia && jailed && !jailed_ip(cred->cr_prison, 819 sintosa(&ia->ia_addr))) 820 ia = NULL; 821 if (ia == NULL) 822 ia = ifatoia(ifa_ifwithnet(sintosa(sin))); 823 if (ia && jailed && !jailed_ip(cred->cr_prison, 824 sintosa(&ia->ia_addr))) 825 ia = NULL; 826 sin->sin_port = fport; 827 if (ia == NULL && 828 !TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) 829 ia = TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia; 830 if (ia && jailed && !jailed_ip(cred->cr_prison, 831 sintosa(&ia->ia_addr))) 832 ia = NULL; 833 834 if (!jailed && ia == NULL) 835 goto fail; 836 } 837 /* 838 * If the destination address is multicast and an outgoing 839 * interface has been set as a multicast option, use the 840 * address of that interface as our source address. 841 */ 842 if (!jailed && IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) && 843 inp->inp_moptions != NULL) { 844 struct ip_moptions *imo; 845 struct ifnet *ifp; 846 847 imo = inp->inp_moptions; 848 if (imo->imo_multicast_ifp != NULL) { 849 struct in_ifaddr_container *iac; 850 851 ifp = imo->imo_multicast_ifp; 852 ia = NULL; 853 TAILQ_FOREACH(iac, 854 &in_ifaddrheads[mycpuid], ia_link) { 855 if (iac->ia->ia_ifp == ifp) { 856 ia = iac->ia; 857 break; 858 } 859 } 860 if (ia == NULL) 861 goto fail; 862 } 863 } 864 /* 865 * Don't do pcblookup call here; return interface in plocal_sin 866 * and exit to caller, that will do the lookup. 867 */ 868 if (ia == NULL && jailed) { 869 if ((jsin = prison_get_nonlocal(cred->cr_prison, AF_INET, NULL)) != NULL || 870 (jsin = prison_get_local(cred->cr_prison, AF_INET, NULL)) != NULL) { 871 *plocal_sin = satosin(jsin); 872 } else { 873 /* IPv6 only Jail */ 874 goto fail; 875 } 876 } else { 877 *plocal_sin = &ia->ia_addr; 878 } 879 } 880 return (0); 881 fail: 882 if (alloc_route) { 883 struct route *ro = &inp->inp_route; 884 885 if (ro->ro_rt != NULL) 886 RTFREE(ro->ro_rt); 887 bzero(ro, sizeof(*ro)); 888 } 889 return (EADDRNOTAVAIL); 890 } 891 892 int 893 in_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 894 struct sockaddr_in **plocal_sin, struct thread *td) 895 { 896 return in_pcbladdr_find(inp, nam, plocal_sin, td, 897 (inp->inp_laddr.s_addr == INADDR_ANY)); 898 } 899 900 /* 901 * Outer subroutine: 902 * Connect from a socket to a specified address. 903 * Both address and port must be specified in argument sin. 904 * If don't have a local address for this socket yet, 905 * then pick one. 906 */ 907 int 908 in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct thread *td) 909 { 910 struct sockaddr_in *if_sin; 911 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 912 int error; 913 914 /* Call inner routine to assign local interface address. */ 915 if ((error = in_pcbladdr(inp, nam, &if_sin, td)) != 0) 916 return (error); 917 918 if (in_pcblookup_hash(inp->inp_cpcbinfo, sin->sin_addr, sin->sin_port, 919 inp->inp_laddr.s_addr ? 920 inp->inp_laddr : if_sin->sin_addr, 921 inp->inp_lport, FALSE, NULL) != NULL) { 922 return (EADDRINUSE); 923 } 924 if (inp->inp_laddr.s_addr == INADDR_ANY) { 925 if (inp->inp_lport == 0) { 926 error = in_pcbbind(inp, NULL, td); 927 if (error) 928 return (error); 929 } 930 inp->inp_laddr = if_sin->sin_addr; 931 } 932 inp->inp_faddr = sin->sin_addr; 933 inp->inp_fport = sin->sin_port; 934 in_pcbinsconnhash(inp); 935 return (0); 936 } 937 938 void 939 in_pcbdisconnect(struct inpcb *inp) 940 { 941 942 inp->inp_faddr.s_addr = INADDR_ANY; 943 inp->inp_fport = 0; 944 in_pcbremconnhash(inp); 945 if (inp->inp_socket->so_state & SS_NOFDREF) 946 in_pcbdetach(inp); 947 } 948 949 void 950 in_pcbdetach(struct inpcb *inp) 951 { 952 struct socket *so = inp->inp_socket; 953 struct inpcbinfo *ipi = inp->inp_pcbinfo; 954 955 #ifdef IPSEC 956 ipsec4_delete_pcbpolicy(inp); 957 #endif /*IPSEC*/ 958 inp->inp_gencnt = ++ipi->ipi_gencnt; 959 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0); 960 in_pcbremlists(inp); 961 so->so_pcb = NULL; 962 sofree(so); /* remove pcb ref */ 963 if (inp->inp_options) 964 m_free(inp->inp_options); 965 if (inp->inp_route.ro_rt) 966 rtfree(inp->inp_route.ro_rt); 967 ip_freemoptions(inp->inp_moptions); 968 inp->inp_vflag = 0; 969 kfree(inp, M_PCB); 970 } 971 972 /* 973 * The calling convention of in_setsockaddr() and in_setpeeraddr() was 974 * modified to match the pru_sockaddr() and pru_peeraddr() entry points 975 * in struct pr_usrreqs, so that protocols can just reference then directly 976 * without the need for a wrapper function. The socket must have a valid 977 * (i.e., non-nil) PCB, but it should be impossible to get an invalid one 978 * except through a kernel programming error, so it is acceptable to panic 979 * (or in this case trap) if the PCB is invalid. (Actually, we don't trap 980 * because there actually /is/ a programming error somewhere... XXX) 981 */ 982 int 983 in_setsockaddr(struct socket *so, struct sockaddr **nam) 984 { 985 struct inpcb *inp; 986 struct sockaddr_in *sin; 987 988 /* 989 * Do the malloc first in case it blocks. 990 */ 991 sin = kmalloc(sizeof *sin, M_SONAME, M_WAITOK | M_ZERO); 992 sin->sin_family = AF_INET; 993 sin->sin_len = sizeof *sin; 994 995 crit_enter(); 996 inp = so->so_pcb; 997 if (!inp) { 998 crit_exit(); 999 kfree(sin, M_SONAME); 1000 return (ECONNRESET); 1001 } 1002 sin->sin_port = inp->inp_lport; 1003 sin->sin_addr = inp->inp_laddr; 1004 crit_exit(); 1005 1006 *nam = (struct sockaddr *)sin; 1007 return (0); 1008 } 1009 1010 void 1011 in_setsockaddr_dispatch(netmsg_t msg) 1012 { 1013 int error; 1014 1015 error = in_setsockaddr(msg->base.nm_so, msg->peeraddr.nm_nam); 1016 lwkt_replymsg(&msg->lmsg, error); 1017 } 1018 1019 int 1020 in_setpeeraddr(struct socket *so, struct sockaddr **nam) 1021 { 1022 struct inpcb *inp; 1023 struct sockaddr_in *sin; 1024 1025 /* 1026 * Do the malloc first in case it blocks. 1027 */ 1028 sin = kmalloc(sizeof *sin, M_SONAME, M_WAITOK | M_ZERO); 1029 sin->sin_family = AF_INET; 1030 sin->sin_len = sizeof *sin; 1031 1032 crit_enter(); 1033 inp = so->so_pcb; 1034 if (!inp) { 1035 crit_exit(); 1036 kfree(sin, M_SONAME); 1037 return (ECONNRESET); 1038 } 1039 sin->sin_port = inp->inp_fport; 1040 sin->sin_addr = inp->inp_faddr; 1041 crit_exit(); 1042 1043 *nam = (struct sockaddr *)sin; 1044 return (0); 1045 } 1046 1047 void 1048 in_setpeeraddr_dispatch(netmsg_t msg) 1049 { 1050 int error; 1051 1052 error = in_setpeeraddr(msg->base.nm_so, msg->peeraddr.nm_nam); 1053 lwkt_replymsg(&msg->lmsg, error); 1054 } 1055 1056 void 1057 in_pcbnotifyall(struct inpcbhead *head, struct in_addr faddr, int err, 1058 void (*notify)(struct inpcb *, int)) 1059 { 1060 struct inpcb *inp, *ninp; 1061 1062 /* 1063 * note: if INP_PLACEMARKER is set we must ignore the rest of 1064 * the structure and skip it. 1065 */ 1066 crit_enter(); 1067 LIST_FOREACH_MUTABLE(inp, head, inp_list, ninp) { 1068 if (inp->inp_flags & INP_PLACEMARKER) 1069 continue; 1070 #ifdef INET6 1071 if (!(inp->inp_vflag & INP_IPV4)) 1072 continue; 1073 #endif 1074 if (inp->inp_faddr.s_addr != faddr.s_addr || 1075 inp->inp_socket == NULL) 1076 continue; 1077 (*notify)(inp, err); /* can remove inp from list! */ 1078 } 1079 crit_exit(); 1080 } 1081 1082 void 1083 in_pcbpurgeif0(struct inpcb *head, struct ifnet *ifp) 1084 { 1085 struct inpcb *inp; 1086 struct ip_moptions *imo; 1087 int i, gap; 1088 1089 for (inp = head; inp != NULL; inp = LIST_NEXT(inp, inp_list)) { 1090 if (inp->inp_flags & INP_PLACEMARKER) 1091 continue; 1092 imo = inp->inp_moptions; 1093 if ((inp->inp_vflag & INP_IPV4) && imo != NULL) { 1094 /* 1095 * Unselect the outgoing interface if it is being 1096 * detached. 1097 */ 1098 if (imo->imo_multicast_ifp == ifp) 1099 imo->imo_multicast_ifp = NULL; 1100 1101 /* 1102 * Drop multicast group membership if we joined 1103 * through the interface being detached. 1104 */ 1105 for (i = 0, gap = 0; i < imo->imo_num_memberships; 1106 i++) { 1107 if (imo->imo_membership[i]->inm_ifp == ifp) { 1108 in_delmulti(imo->imo_membership[i]); 1109 gap++; 1110 } else if (gap != 0) 1111 imo->imo_membership[i - gap] = 1112 imo->imo_membership[i]; 1113 } 1114 imo->imo_num_memberships -= gap; 1115 } 1116 } 1117 } 1118 1119 /* 1120 * Check for alternatives when higher level complains 1121 * about service problems. For now, invalidate cached 1122 * routing information. If the route was created dynamically 1123 * (by a redirect), time to try a default gateway again. 1124 */ 1125 void 1126 in_losing(struct inpcb *inp) 1127 { 1128 struct rtentry *rt; 1129 struct rt_addrinfo rtinfo; 1130 1131 if ((rt = inp->inp_route.ro_rt)) { 1132 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1133 rtinfo.rti_info[RTAX_DST] = rt_key(rt); 1134 rtinfo.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1135 rtinfo.rti_info[RTAX_NETMASK] = rt_mask(rt); 1136 rtinfo.rti_flags = rt->rt_flags; 1137 rt_missmsg(RTM_LOSING, &rtinfo, rt->rt_flags, 0); 1138 if (rt->rt_flags & RTF_DYNAMIC) { 1139 rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1140 rt_mask(rt), rt->rt_flags, NULL); 1141 } 1142 inp->inp_route.ro_rt = NULL; 1143 rtfree(rt); 1144 /* 1145 * A new route can be allocated 1146 * the next time output is attempted. 1147 */ 1148 } 1149 } 1150 1151 /* 1152 * After a routing change, flush old routing 1153 * and allocate a (hopefully) better one. 1154 */ 1155 void 1156 in_rtchange(struct inpcb *inp, int err) 1157 { 1158 if (inp->inp_route.ro_rt) { 1159 rtfree(inp->inp_route.ro_rt); 1160 inp->inp_route.ro_rt = NULL; 1161 /* 1162 * A new route can be allocated the next time 1163 * output is attempted. 1164 */ 1165 } 1166 } 1167 1168 /* 1169 * Lookup a PCB based on the local address and port. 1170 */ 1171 struct inpcb * 1172 in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr, 1173 u_int lport_arg, int wild_okay, struct ucred *cred) 1174 { 1175 struct inpcb *inp; 1176 int matchwild = 3, wildcard; 1177 u_short lport = lport_arg; 1178 struct inpcbporthead *porthash; 1179 struct inpcbport *phd; 1180 struct inpcb *match = NULL; 1181 1182 /* 1183 * If the porthashbase is shared across several cpus we need 1184 * to lock. 1185 */ 1186 if (pcbinfo->porttoken) 1187 lwkt_gettoken(pcbinfo->porttoken); 1188 1189 /* 1190 * Best fit PCB lookup. 1191 * 1192 * First see if this local port is in use by looking on the 1193 * port hash list. 1194 */ 1195 porthash = &pcbinfo->porthashbase[ 1196 INP_PCBPORTHASH(lport, pcbinfo->porthashmask)]; 1197 LIST_FOREACH(phd, porthash, phd_hash) { 1198 if (phd->phd_port == lport) 1199 break; 1200 } 1201 if (phd != NULL) { 1202 /* 1203 * Port is in use by one or more PCBs. Look for best 1204 * fit. 1205 */ 1206 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 1207 wildcard = 0; 1208 #ifdef INET6 1209 if ((inp->inp_vflag & INP_IPV4) == 0) 1210 continue; 1211 #endif 1212 if (inp->inp_faddr.s_addr != INADDR_ANY) 1213 wildcard++; 1214 if (inp->inp_laddr.s_addr != INADDR_ANY) { 1215 if (laddr.s_addr == INADDR_ANY) 1216 wildcard++; 1217 else if (inp->inp_laddr.s_addr != laddr.s_addr) 1218 continue; 1219 } else { 1220 if (laddr.s_addr != INADDR_ANY) 1221 wildcard++; 1222 } 1223 if (wildcard && !wild_okay) 1224 continue; 1225 if (wildcard < matchwild && 1226 (cred == NULL || 1227 cred->cr_prison == 1228 inp->inp_socket->so_cred->cr_prison)) { 1229 match = inp; 1230 matchwild = wildcard; 1231 if (matchwild == 0) { 1232 break; 1233 } 1234 } 1235 } 1236 } 1237 if (pcbinfo->porttoken) 1238 lwkt_reltoken(pcbinfo->porttoken); 1239 return (match); 1240 } 1241 1242 static struct inpcb * 1243 inp_localgroup_lookup(const struct inpcbinfo *pcbinfo, 1244 struct in_addr laddr, uint16_t lport, uint32_t pkt_hash) 1245 { 1246 struct inpcb *local_wild = NULL; 1247 const struct inp_localgrphead *hdr; 1248 const struct inp_localgroup *grp; 1249 1250 hdr = &pcbinfo->localgrphashbase[ 1251 INP_PCBLOCALGRPHASH(lport, pcbinfo->localgrphashmask)]; 1252 pkt_hash >>= ncpus2_shift; 1253 1254 /* 1255 * Order of socket selection: 1256 * 1. non-wild. 1257 * 2. wild. 1258 * 1259 * NOTE: 1260 * - Local group does not contain jailed sockets 1261 * - Local group does not contain IPv4 mapped INET6 wild sockets 1262 */ 1263 LIST_FOREACH(grp, hdr, il_list) { 1264 #ifdef INET6 1265 if (!(grp->il_vflag & INP_IPV4)) 1266 continue; 1267 #endif 1268 if (grp->il_lport == lport) { 1269 int idx; 1270 1271 idx = pkt_hash / grp->il_factor; 1272 KASSERT(idx < grp->il_inpcnt && idx >= 0, 1273 ("invalid hash %04x, cnt %d or fact %d", 1274 pkt_hash, grp->il_inpcnt, grp->il_factor)); 1275 1276 if (grp->il_laddr.s_addr == laddr.s_addr) 1277 return grp->il_inp[idx]; 1278 else if (grp->il_laddr.s_addr == INADDR_ANY) 1279 local_wild = grp->il_inp[idx]; 1280 } 1281 } 1282 if (local_wild != NULL) 1283 return local_wild; 1284 return NULL; 1285 } 1286 1287 /* 1288 * Lookup PCB in hash list. 1289 */ 1290 struct inpcb * 1291 in_pcblookup_pkthash(struct inpcbinfo *pcbinfo, struct in_addr faddr, 1292 u_int fport_arg, struct in_addr laddr, u_int lport_arg, 1293 boolean_t wildcard, struct ifnet *ifp, const struct mbuf *m) 1294 { 1295 struct inpcbhead *head; 1296 struct inpcb *inp, *jinp=NULL; 1297 u_short fport = fport_arg, lport = lport_arg; 1298 1299 /* 1300 * First look for an exact match. 1301 */ 1302 head = &pcbinfo->hashbase[INP_PCBCONNHASH(faddr.s_addr, fport, 1303 laddr.s_addr, lport, pcbinfo->hashmask)]; 1304 LIST_FOREACH(inp, head, inp_hash) { 1305 #ifdef INET6 1306 if (!(inp->inp_vflag & INP_IPV4)) 1307 continue; 1308 #endif 1309 if (in_hosteq(inp->inp_faddr, faddr) && 1310 in_hosteq(inp->inp_laddr, laddr) && 1311 inp->inp_fport == fport && inp->inp_lport == lport) { 1312 /* found */ 1313 if (inp->inp_socket == NULL || 1314 inp->inp_socket->so_cred->cr_prison == NULL) { 1315 return (inp); 1316 } else { 1317 if (jinp == NULL) 1318 jinp = inp; 1319 } 1320 } 1321 } 1322 if (jinp != NULL) 1323 return (jinp); 1324 if (wildcard) { 1325 struct inpcb *local_wild = NULL; 1326 struct inpcb *jinp_wild = NULL; 1327 #ifdef INET6 1328 struct inpcb *local_wild_mapped = NULL; 1329 #endif 1330 struct inpcontainer *ic; 1331 struct inpcontainerhead *chead; 1332 struct sockaddr_in jsin; 1333 struct ucred *cred; 1334 1335 /* 1336 * Check local group first 1337 */ 1338 if (pcbinfo->localgrphashbase != NULL && 1339 m != NULL && (m->m_flags & M_HASH) && 1340 !(ifp && ifp->if_type == IFT_FAITH)) { 1341 inp = inp_localgroup_lookup(pcbinfo, 1342 laddr, lport, m->m_pkthdr.hash); 1343 if (inp != NULL) 1344 return inp; 1345 } 1346 1347 /* 1348 * Order of socket selection: 1349 * 1. non-jailed, non-wild. 1350 * 2. non-jailed, wild. 1351 * 3. jailed, non-wild. 1352 * 4. jailed, wild. 1353 */ 1354 jsin.sin_family = AF_INET; 1355 chead = &pcbinfo->wildcardhashbase[ 1356 INP_PCBWILDCARDHASH(lport, pcbinfo->wildcardhashmask)]; 1357 LIST_FOREACH(ic, chead, ic_list) { 1358 inp = ic->ic_inp; 1359 jsin.sin_addr.s_addr = laddr.s_addr; 1360 #ifdef INET6 1361 if (!(inp->inp_vflag & INP_IPV4)) 1362 continue; 1363 #endif 1364 if (inp->inp_socket != NULL) 1365 cred = inp->inp_socket->so_cred; 1366 else 1367 cred = NULL; 1368 if (cred != NULL && jailed(cred)) { 1369 if (jinp != NULL) 1370 continue; 1371 else 1372 if (!jailed_ip(cred->cr_prison, 1373 (struct sockaddr *)&jsin)) 1374 continue; 1375 } 1376 if (inp->inp_lport == lport) { 1377 if (ifp && ifp->if_type == IFT_FAITH && 1378 !(inp->inp_flags & INP_FAITH)) 1379 continue; 1380 if (inp->inp_laddr.s_addr == laddr.s_addr) { 1381 if (cred != NULL && jailed(cred)) 1382 jinp = inp; 1383 else 1384 return (inp); 1385 } 1386 if (inp->inp_laddr.s_addr == INADDR_ANY) { 1387 #ifdef INET6 1388 if (INP_CHECK_SOCKAF(inp->inp_socket, 1389 AF_INET6)) 1390 local_wild_mapped = inp; 1391 else 1392 #endif 1393 if (cred != NULL && 1394 jailed(cred)) 1395 jinp_wild = inp; 1396 else 1397 local_wild = inp; 1398 } 1399 } 1400 } 1401 if (local_wild != NULL) 1402 return (local_wild); 1403 #ifdef INET6 1404 if (local_wild_mapped != NULL) 1405 return (local_wild_mapped); 1406 #endif 1407 if (jinp != NULL) 1408 return (jinp); 1409 return (jinp_wild); 1410 } 1411 1412 /* 1413 * Not found. 1414 */ 1415 return (NULL); 1416 } 1417 1418 struct inpcb * 1419 in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr, 1420 u_int fport_arg, struct in_addr laddr, u_int lport_arg, 1421 boolean_t wildcard, struct ifnet *ifp) 1422 { 1423 return in_pcblookup_pkthash(pcbinfo, faddr, fport_arg, 1424 laddr, lport_arg, wildcard, ifp, NULL); 1425 } 1426 1427 /* 1428 * Insert PCB into connection hash table. 1429 */ 1430 void 1431 in_pcbinsconnhash(struct inpcb *inp) 1432 { 1433 struct inpcbinfo *pcbinfo = inp->inp_cpcbinfo; 1434 struct inpcbhead *bucket; 1435 u_int32_t hashkey_faddr, hashkey_laddr; 1436 1437 #ifdef INET6 1438 if (inp->inp_vflag & INP_IPV6) { 1439 hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX JH */; 1440 hashkey_laddr = inp->in6p_laddr.s6_addr32[3] /* XXX JH */; 1441 } else { 1442 #endif 1443 hashkey_faddr = inp->inp_faddr.s_addr; 1444 hashkey_laddr = inp->inp_laddr.s_addr; 1445 #ifdef INET6 1446 } 1447 #endif 1448 1449 KASSERT(!(inp->inp_flags & INP_WILDCARD), 1450 ("already on wildcardhash")); 1451 KASSERT(!(inp->inp_flags & INP_CONNECTED), 1452 ("already on connhash")); 1453 inp->inp_flags |= INP_CONNECTED; 1454 1455 /* 1456 * Insert into the connection hash table. 1457 */ 1458 bucket = &pcbinfo->hashbase[INP_PCBCONNHASH(hashkey_faddr, 1459 inp->inp_fport, hashkey_laddr, inp->inp_lport, pcbinfo->hashmask)]; 1460 LIST_INSERT_HEAD(bucket, inp, inp_hash); 1461 } 1462 1463 /* 1464 * Remove PCB from connection hash table. 1465 */ 1466 void 1467 in_pcbremconnhash(struct inpcb *inp) 1468 { 1469 KASSERT(inp->inp_flags & INP_CONNECTED, ("inp not connected")); 1470 LIST_REMOVE(inp, inp_hash); 1471 inp->inp_flags &= ~INP_CONNECTED; 1472 } 1473 1474 /* 1475 * Insert PCB into port hash table. 1476 */ 1477 int 1478 in_pcbinsporthash(struct inpcb *inp) 1479 { 1480 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1481 struct inpcbporthead *pcbporthash; 1482 struct inpcbport *phd; 1483 1484 /* 1485 * If the porthashbase is shared across several cpus we need 1486 * to lock. 1487 */ 1488 if (pcbinfo->porttoken) 1489 lwkt_gettoken(pcbinfo->porttoken); 1490 1491 /* 1492 * Insert into the port hash table. 1493 */ 1494 pcbporthash = &pcbinfo->porthashbase[ 1495 INP_PCBPORTHASH(inp->inp_lport, pcbinfo->porthashmask)]; 1496 1497 /* Go through port list and look for a head for this lport. */ 1498 LIST_FOREACH(phd, pcbporthash, phd_hash) { 1499 if (phd->phd_port == inp->inp_lport) 1500 break; 1501 } 1502 1503 /* If none exists, malloc one and tack it on. */ 1504 if (phd == NULL) { 1505 KKASSERT(pcbinfo->portsave != NULL); 1506 phd = pcbinfo->portsave; 1507 pcbinfo->portsave = NULL; 1508 phd->phd_port = inp->inp_lport; 1509 LIST_INIT(&phd->phd_pcblist); 1510 LIST_INSERT_HEAD(pcbporthash, phd, phd_hash); 1511 } 1512 1513 inp->inp_phd = phd; 1514 LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist); 1515 1516 if (pcbinfo->porttoken) 1517 lwkt_reltoken(pcbinfo->porttoken); 1518 if (pcbinfo->portsave == NULL) { 1519 pcbinfo->portsave = kmalloc(sizeof(*pcbinfo->portsave), 1520 M_PCB, M_INTWAIT | M_ZERO); 1521 } 1522 return (0); 1523 } 1524 1525 static struct inp_localgroup * 1526 inp_localgroup_alloc(struct inp_localgrphead *hdr, u_char vflag, 1527 uint16_t port, const union in_dependaddr *addr, int size) 1528 { 1529 struct inp_localgroup *grp; 1530 1531 grp = kmalloc(__offsetof(struct inp_localgroup, il_inp[size]), 1532 M_TEMP, M_INTWAIT | M_ZERO); 1533 grp->il_vflag = vflag; 1534 grp->il_lport = port; 1535 grp->il_dependladdr = *addr; 1536 grp->il_inpsiz = size; 1537 1538 LIST_INSERT_HEAD(hdr, grp, il_list); 1539 1540 return grp; 1541 } 1542 1543 static void 1544 inp_localgroup_free(struct inp_localgroup *grp) 1545 { 1546 LIST_REMOVE(grp, il_list); 1547 kfree(grp, M_TEMP); 1548 } 1549 1550 static struct inp_localgroup * 1551 inp_localgroup_resize(struct inp_localgrphead *hdr, 1552 struct inp_localgroup *old_grp, int size) 1553 { 1554 struct inp_localgroup *grp; 1555 int i; 1556 1557 grp = inp_localgroup_alloc(hdr, old_grp->il_vflag, 1558 old_grp->il_lport, &old_grp->il_dependladdr, size); 1559 1560 KASSERT(old_grp->il_inpcnt < grp->il_inpsiz, 1561 ("invalid new local group size %d and old local group count %d", 1562 grp->il_inpsiz, old_grp->il_inpcnt)); 1563 for (i = 0; i < old_grp->il_inpcnt; ++i) 1564 grp->il_inp[i] = old_grp->il_inp[i]; 1565 grp->il_inpcnt = old_grp->il_inpcnt; 1566 grp->il_factor = old_grp->il_factor; 1567 1568 inp_localgroup_free(old_grp); 1569 1570 return grp; 1571 } 1572 1573 static void 1574 inp_localgroup_factor(struct inp_localgroup *grp) 1575 { 1576 grp->il_factor = 1577 ((uint32_t)(0xffff >> ncpus2_shift) / grp->il_inpcnt) + 1; 1578 KASSERT(grp->il_factor != 0, ("invalid local group factor, " 1579 "ncpus2_shift %d, inpcnt %d", ncpus2_shift, grp->il_inpcnt)); 1580 } 1581 1582 static void 1583 in_pcbinslocalgrphash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1584 { 1585 struct inp_localgrphead *hdr; 1586 struct inp_localgroup *grp; 1587 struct ucred *cred; 1588 1589 if (pcbinfo->localgrphashbase == NULL) 1590 return; 1591 1592 /* 1593 * XXX don't allow jailed socket to join local group 1594 */ 1595 if (inp->inp_socket != NULL) 1596 cred = inp->inp_socket->so_cred; 1597 else 1598 cred = NULL; 1599 if (cred != NULL && jailed(cred)) 1600 return; 1601 1602 #ifdef INET6 1603 /* 1604 * XXX don't allow IPv4 mapped INET6 wild socket 1605 */ 1606 if ((inp->inp_vflag & INP_IPV4) && 1607 inp->inp_laddr.s_addr == INADDR_ANY && 1608 INP_CHECK_SOCKAF(inp->inp_socket, AF_INET6)) 1609 return; 1610 #endif 1611 1612 hdr = &pcbinfo->localgrphashbase[ 1613 INP_PCBLOCALGRPHASH(inp->inp_lport, pcbinfo->localgrphashmask)]; 1614 1615 LIST_FOREACH(grp, hdr, il_list) { 1616 if (grp->il_vflag == inp->inp_vflag && 1617 grp->il_lport == inp->inp_lport && 1618 memcmp(&grp->il_dependladdr, 1619 &inp->inp_inc.inc_ie.ie_dependladdr, 1620 sizeof(grp->il_dependladdr)) == 0) { 1621 break; 1622 } 1623 } 1624 if (grp == NULL) { 1625 /* Create new local group */ 1626 grp = inp_localgroup_alloc(hdr, inp->inp_vflag, 1627 inp->inp_lport, &inp->inp_inc.inc_ie.ie_dependladdr, 1628 INP_LOCALGROUP_SIZMIN); 1629 } else if (grp->il_inpcnt == grp->il_inpsiz) { 1630 if (grp->il_inpsiz >= INP_LOCALGROUP_SIZMAX) { 1631 static int limit_logged = 0; 1632 1633 if (!limit_logged) { 1634 limit_logged = 1; 1635 kprintf("local group port %d, " 1636 "limit reached\n", ntohs(grp->il_lport)); 1637 } 1638 return; 1639 } 1640 1641 /* Expand this local group */ 1642 grp = inp_localgroup_resize(hdr, grp, grp->il_inpsiz * 2); 1643 } 1644 1645 KASSERT(grp->il_inpcnt < grp->il_inpsiz, 1646 ("invalid local group size %d and count %d", 1647 grp->il_inpsiz, grp->il_inpcnt)); 1648 grp->il_inp[grp->il_inpcnt] = inp; 1649 grp->il_inpcnt++; 1650 inp_localgroup_factor(grp); 1651 } 1652 1653 void 1654 in_pcbinswildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1655 { 1656 struct inpcontainer *ic; 1657 struct inpcontainerhead *bucket; 1658 1659 in_pcbinslocalgrphash_oncpu(inp, pcbinfo); 1660 1661 bucket = &pcbinfo->wildcardhashbase[ 1662 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1663 1664 ic = kmalloc(sizeof(struct inpcontainer), M_TEMP, M_INTWAIT); 1665 ic->ic_inp = inp; 1666 LIST_INSERT_HEAD(bucket, ic, ic_list); 1667 } 1668 1669 /* 1670 * Insert PCB into wildcard hash table. 1671 */ 1672 void 1673 in_pcbinswildcardhash(struct inpcb *inp) 1674 { 1675 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1676 1677 KASSERT(!(inp->inp_flags & INP_CONNECTED), 1678 ("already on connhash")); 1679 KASSERT(!(inp->inp_flags & INP_WILDCARD), 1680 ("already on wildcardhash")); 1681 inp->inp_flags |= INP_WILDCARD; 1682 1683 in_pcbinswildcardhash_oncpu(inp, pcbinfo); 1684 } 1685 1686 static void 1687 in_pcbremlocalgrphash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1688 { 1689 struct inp_localgrphead *hdr; 1690 struct inp_localgroup *grp; 1691 1692 if (pcbinfo->localgrphashbase == NULL) 1693 return; 1694 1695 hdr = &pcbinfo->localgrphashbase[ 1696 INP_PCBLOCALGRPHASH(inp->inp_lport, pcbinfo->localgrphashmask)]; 1697 1698 LIST_FOREACH(grp, hdr, il_list) { 1699 int i; 1700 1701 for (i = 0; i < grp->il_inpcnt; ++i) { 1702 if (grp->il_inp[i] != inp) 1703 continue; 1704 1705 if (grp->il_inpcnt == 1) { 1706 /* Free this local group */ 1707 inp_localgroup_free(grp); 1708 } else { 1709 /* Pull up inpcbs */ 1710 for (; i + 1 < grp->il_inpcnt; ++i) 1711 grp->il_inp[i] = grp->il_inp[i + 1]; 1712 grp->il_inpcnt--; 1713 inp_localgroup_factor(grp); 1714 1715 if (grp->il_inpsiz > INP_LOCALGROUP_SIZMIN && 1716 grp->il_inpcnt <= (grp->il_inpsiz / 4)) { 1717 /* Shrink this local group */ 1718 grp = inp_localgroup_resize(hdr, grp, 1719 grp->il_inpsiz / 2); 1720 } 1721 } 1722 return; 1723 } 1724 } 1725 } 1726 1727 void 1728 in_pcbremwildcardhash_oncpu(struct inpcb *inp, struct inpcbinfo *pcbinfo) 1729 { 1730 struct inpcontainer *ic; 1731 struct inpcontainerhead *head; 1732 1733 in_pcbremlocalgrphash_oncpu(inp, pcbinfo); 1734 1735 /* find bucket */ 1736 head = &pcbinfo->wildcardhashbase[ 1737 INP_PCBWILDCARDHASH(inp->inp_lport, pcbinfo->wildcardhashmask)]; 1738 1739 LIST_FOREACH(ic, head, ic_list) { 1740 if (ic->ic_inp == inp) 1741 goto found; 1742 } 1743 return; /* not found! */ 1744 1745 found: 1746 LIST_REMOVE(ic, ic_list); /* remove container from bucket chain */ 1747 kfree(ic, M_TEMP); /* deallocate container */ 1748 } 1749 1750 /* 1751 * Remove PCB from wildcard hash table. 1752 */ 1753 void 1754 in_pcbremwildcardhash(struct inpcb *inp) 1755 { 1756 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 1757 1758 KASSERT(inp->inp_flags & INP_WILDCARD, ("inp not wildcard")); 1759 in_pcbremwildcardhash_oncpu(inp, pcbinfo); 1760 inp->inp_flags &= ~INP_WILDCARD; 1761 } 1762 1763 /* 1764 * Remove PCB from various lists. 1765 */ 1766 void 1767 in_pcbremlists(struct inpcb *inp) 1768 { 1769 struct inpcbinfo *pcbinfo; 1770 1771 if (inp->inp_lport) { 1772 struct inpcbport *phd; 1773 1774 pcbinfo = inp->inp_pcbinfo; 1775 if (pcbinfo->porttoken) 1776 lwkt_gettoken(pcbinfo->porttoken); 1777 1778 phd = inp->inp_phd; 1779 LIST_REMOVE(inp, inp_portlist); 1780 if (LIST_FIRST(&phd->phd_pcblist) == NULL) { 1781 LIST_REMOVE(phd, phd_hash); 1782 kfree(phd, M_PCB); 1783 } 1784 if (pcbinfo->porttoken) 1785 lwkt_reltoken(pcbinfo->porttoken); 1786 } 1787 if (inp->inp_flags & INP_WILDCARD) { 1788 in_pcbremwildcardhash(inp); 1789 } else if (inp->inp_flags & INP_CONNECTED) { 1790 in_pcbremconnhash(inp); 1791 } 1792 LIST_REMOVE(inp, inp_list); 1793 inp->inp_pcbinfo->ipi_count--; 1794 } 1795 1796 int 1797 prison_xinpcb(struct thread *td, struct inpcb *inp) 1798 { 1799 struct ucred *cr; 1800 1801 if (td->td_proc == NULL) 1802 return (0); 1803 cr = td->td_proc->p_ucred; 1804 if (cr->cr_prison == NULL) 1805 return (0); 1806 if (inp->inp_socket && inp->inp_socket->so_cred && 1807 inp->inp_socket->so_cred->cr_prison && 1808 cr->cr_prison == inp->inp_socket->so_cred->cr_prison) 1809 return (0); 1810 return (1); 1811 } 1812 1813 int 1814 in_pcblist_global(SYSCTL_HANDLER_ARGS) 1815 { 1816 struct inpcbinfo *pcbinfo = arg1; 1817 struct inpcb *inp, *marker; 1818 struct xinpcb xi; 1819 int error, i, n; 1820 1821 /* 1822 * The process of preparing the TCB list is too time-consuming and 1823 * resource-intensive to repeat twice on every request. 1824 */ 1825 if (req->oldptr == NULL) { 1826 n = pcbinfo->ipi_count; 1827 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb); 1828 return 0; 1829 } 1830 1831 if (req->newptr != NULL) 1832 return EPERM; 1833 1834 /* 1835 * OK, now we're committed to doing something. Re-fetch ipi_count 1836 * after obtaining the generation count. 1837 */ 1838 n = pcbinfo->ipi_count; 1839 1840 marker = kmalloc(sizeof(struct inpcb), M_TEMP, M_WAITOK|M_ZERO); 1841 marker->inp_flags |= INP_PLACEMARKER; 1842 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 1843 1844 i = 0; 1845 error = 0; 1846 1847 while ((inp = LIST_NEXT(marker, inp_list)) != NULL && i < n) { 1848 LIST_REMOVE(marker, inp_list); 1849 LIST_INSERT_AFTER(inp, marker, inp_list); 1850 1851 if (inp->inp_flags & INP_PLACEMARKER) 1852 continue; 1853 if (prison_xinpcb(req->td, inp)) 1854 continue; 1855 bzero(&xi, sizeof xi); 1856 xi.xi_len = sizeof xi; 1857 bcopy(inp, &xi.xi_inp, sizeof *inp); 1858 if (inp->inp_socket) 1859 sotoxsocket(inp->inp_socket, &xi.xi_socket); 1860 if ((error = SYSCTL_OUT(req, &xi, sizeof xi)) != 0) 1861 break; 1862 ++i; 1863 } 1864 LIST_REMOVE(marker, inp_list); 1865 if (error == 0 && i < n) { 1866 bzero(&xi, sizeof xi); 1867 xi.xi_len = sizeof xi; 1868 while (i < n) { 1869 error = SYSCTL_OUT(req, &xi, sizeof xi); 1870 ++i; 1871 } 1872 } 1873 kfree(marker, M_TEMP); 1874 return(error); 1875 } 1876 1877 int 1878 in_pcblist_global_nomarker(SYSCTL_HANDLER_ARGS, struct xinpcb **xi0, int *nxi0) 1879 { 1880 struct inpcbinfo *pcbinfo = arg1; 1881 struct inpcb *inp; 1882 struct xinpcb *xi; 1883 int nxi; 1884 1885 *nxi0 = 0; 1886 *xi0 = NULL; 1887 1888 /* 1889 * The process of preparing the PCB list is too time-consuming and 1890 * resource-intensive to repeat twice on every request. 1891 */ 1892 if (req->oldptr == NULL) { 1893 int n = pcbinfo->ipi_count; 1894 1895 req->oldidx = (n + n/8 + 10) * sizeof(struct xinpcb); 1896 return 0; 1897 } 1898 1899 if (req->newptr != NULL) 1900 return EPERM; 1901 1902 if (pcbinfo->ipi_count == 0) 1903 return 0; 1904 1905 nxi = 0; 1906 xi = kmalloc(pcbinfo->ipi_count * sizeof(*xi), M_TEMP, 1907 M_WAITOK | M_ZERO | M_NULLOK); 1908 if (xi == NULL) 1909 return ENOMEM; 1910 1911 LIST_FOREACH(inp, &pcbinfo->pcblisthead, inp_list) { 1912 struct xinpcb *xi_ptr = &xi[nxi]; 1913 1914 if (prison_xinpcb(req->td, inp)) 1915 continue; 1916 1917 xi_ptr->xi_len = sizeof(*xi_ptr); 1918 bcopy(inp, &xi_ptr->xi_inp, sizeof(*inp)); 1919 if (inp->inp_socket) 1920 sotoxsocket(inp->inp_socket, &xi_ptr->xi_socket); 1921 ++nxi; 1922 } 1923 1924 if (nxi == 0) { 1925 kfree(xi, M_TEMP); 1926 return 0; 1927 } 1928 1929 *nxi0 = nxi; 1930 *xi0 = xi; 1931 1932 return 0; 1933 } 1934 1935 void 1936 in_savefaddr(struct socket *so, const struct sockaddr *faddr) 1937 { 1938 struct sockaddr_in *sin; 1939 1940 KASSERT(faddr->sa_family == AF_INET, 1941 ("not AF_INET faddr %d", faddr->sa_family)); 1942 1943 sin = kmalloc(sizeof(*sin), M_SONAME, M_WAITOK | M_ZERO); 1944 sin->sin_family = AF_INET; 1945 sin->sin_len = sizeof(*sin); 1946 sin->sin_port = ((const struct sockaddr_in *)faddr)->sin_port; 1947 sin->sin_addr = ((const struct sockaddr_in *)faddr)->sin_addr; 1948 1949 so->so_faddr = (struct sockaddr *)sin; 1950 } 1951