1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if.c 8.3 (Berkeley) 1/4/94 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $ 35 * $DragonFly: src/sys/net/if.c,v 1.63 2008/03/29 03:38:53 sephe Exp $ 36 */ 37 38 #include "opt_compat.h" 39 #include "opt_inet6.h" 40 #include "opt_inet.h" 41 #include "opt_polling.h" 42 43 #include <sys/param.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/systm.h> 47 #include <sys/proc.h> 48 #include <sys/protosw.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/socketops.h> 52 #include <sys/protosw.h> 53 #include <sys/kernel.h> 54 #include <sys/sockio.h> 55 #include <sys/syslog.h> 56 #include <sys/sysctl.h> 57 #include <sys/domain.h> 58 #include <sys/thread.h> 59 #include <sys/thread2.h> 60 #include <sys/serialize.h> 61 #include <sys/msgport2.h> 62 63 #include <net/if.h> 64 #include <net/if_arp.h> 65 #include <net/if_dl.h> 66 #include <net/if_types.h> 67 #include <net/if_var.h> 68 #include <net/ifq_var.h> 69 #include <net/radix.h> 70 #include <net/route.h> 71 #include <net/if_clone.h> 72 #include <net/netmsg2.h> 73 74 #include <machine/stdarg.h> 75 #include <machine/smp.h> 76 77 #if defined(INET) || defined(INET6) 78 /*XXX*/ 79 #include <netinet/in.h> 80 #include <netinet/in_var.h> 81 #include <netinet/if_ether.h> 82 #ifdef INET6 83 #include <netinet6/in6_var.h> 84 #include <netinet6/in6_ifattach.h> 85 #endif 86 #endif 87 88 #if defined(COMPAT_43) 89 #include <emulation/43bsd/43bsd_socket.h> 90 #endif /* COMPAT_43 */ 91 92 struct netmsg_ifaddr { 93 struct netmsg netmsg; 94 struct ifaddr *ifa; 95 struct ifnet *ifp; 96 int tail; 97 }; 98 99 /* 100 * Support for non-ALTQ interfaces. 101 */ 102 static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *, 103 struct altq_pktattr *); 104 static struct mbuf * 105 ifq_classic_dequeue(struct ifaltq *, struct mbuf *, int); 106 static int ifq_classic_request(struct ifaltq *, int, void *); 107 108 /* 109 * System initialization 110 */ 111 static void if_attachdomain(void *); 112 static void if_attachdomain1(struct ifnet *); 113 static int ifconf(u_long, caddr_t, struct ucred *); 114 static void ifinit(void *); 115 static void ifaddrinit(void *); 116 static void if_slowtimo(void *); 117 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 118 static int if_rtdel(struct radix_node *, void *); 119 120 #ifdef INET6 121 /* 122 * XXX: declare here to avoid to include many inet6 related files.. 123 * should be more generalized? 124 */ 125 extern void nd6_setmtu(struct ifnet *); 126 #endif 127 128 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 129 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 130 131 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL) 132 /* Must be after netisr_init */ 133 SYSINIT(ifaddr, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifaddrinit, NULL) 134 135 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 136 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 137 138 int ifqmaxlen = IFQ_MAXLEN; 139 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 140 141 struct callout if_slowtimo_timer; 142 143 int if_index = 0; 144 struct ifnet **ifindex2ifnet = NULL; 145 static struct thread ifaddr_threads[MAXCPU]; 146 147 /* 148 * Network interface utility routines. 149 * 150 * Routines with ifa_ifwith* names take sockaddr *'s as 151 * parameters. 152 */ 153 /* ARGSUSED*/ 154 void 155 ifinit(void *dummy) 156 { 157 struct ifnet *ifp; 158 159 callout_init(&if_slowtimo_timer); 160 161 crit_enter(); 162 TAILQ_FOREACH(ifp, &ifnet, if_link) { 163 if (ifp->if_snd.ifq_maxlen == 0) { 164 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); 165 ifp->if_snd.ifq_maxlen = ifqmaxlen; 166 } 167 } 168 crit_exit(); 169 170 if_slowtimo(0); 171 } 172 173 /* 174 * Attach an interface to the list of "active" interfaces. 175 * 176 * The serializer is optional. If non-NULL access to the interface 177 * may be MPSAFE. 178 */ 179 void 180 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 181 { 182 unsigned socksize, ifasize; 183 int namelen, masklen; 184 struct sockaddr_dl *sdl; 185 struct ifaddr *ifa; 186 struct ifaltq *ifq; 187 int i; 188 189 static int if_indexlim = 8; 190 191 /* 192 * The serializer can be passed in from the device, allowing the 193 * same serializer to be used for both the interrupt interlock and 194 * the device queue. If not specified, the netif structure will 195 * use an embedded serializer. 196 */ 197 if (serializer == NULL) { 198 serializer = &ifp->if_default_serializer; 199 lwkt_serialize_init(serializer); 200 } 201 ifp->if_serializer = serializer; 202 203 #ifdef DEVICE_POLLING 204 /* Device is not in polling mode by default */ 205 ifp->if_poll_cpuid = -1; 206 #endif 207 208 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); 209 ifp->if_index = ++if_index; 210 211 /* 212 * XXX - 213 * The old code would work if the interface passed a pre-existing 214 * chain of ifaddrs to this code. We don't trust our callers to 215 * properly initialize the tailq, however, so we no longer allow 216 * this unlikely case. 217 */ 218 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 219 M_IFADDR, M_WAITOK | M_ZERO); 220 for (i = 0; i < ncpus; ++i) 221 TAILQ_INIT(&ifp->if_addrheads[i]); 222 223 TAILQ_INIT(&ifp->if_prefixhead); 224 LIST_INIT(&ifp->if_multiaddrs); 225 getmicrotime(&ifp->if_lastchange); 226 if (ifindex2ifnet == NULL || if_index >= if_indexlim) { 227 unsigned int n; 228 struct ifnet **q; 229 230 if_indexlim <<= 1; 231 232 /* grow ifindex2ifnet */ 233 n = if_indexlim * sizeof(*q); 234 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 235 if (ifindex2ifnet) { 236 bcopy(ifindex2ifnet, q, n/2); 237 kfree(ifindex2ifnet, M_IFADDR); 238 } 239 ifindex2ifnet = q; 240 } 241 242 ifindex2ifnet[if_index] = ifp; 243 244 /* 245 * create a Link Level name for this device 246 */ 247 namelen = strlen(ifp->if_xname); 248 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) 249 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 250 socksize = masklen + ifp->if_addrlen; 251 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 252 if (socksize < sizeof(*sdl)) 253 socksize = sizeof(*sdl); 254 socksize = ROUNDUP(socksize); 255 ifasize = sizeof(struct ifaddr) + 2 * socksize; 256 ifa = ifa_create(ifasize, M_WAITOK); 257 sdl = (struct sockaddr_dl *)(ifa + 1); 258 sdl->sdl_len = socksize; 259 sdl->sdl_family = AF_LINK; 260 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 261 sdl->sdl_nlen = namelen; 262 sdl->sdl_index = ifp->if_index; 263 sdl->sdl_type = ifp->if_type; 264 ifp->if_lladdr = ifa; 265 ifa->ifa_ifp = ifp; 266 ifa->ifa_rtrequest = link_rtrequest; 267 ifa->ifa_addr = (struct sockaddr *)sdl; 268 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 269 ifa->ifa_netmask = (struct sockaddr *)sdl; 270 sdl->sdl_len = masklen; 271 while (namelen != 0) 272 sdl->sdl_data[--namelen] = 0xff; 273 ifa_iflink(ifa, ifp, 0 /* Insert head */); 274 275 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 276 277 ifq = &ifp->if_snd; 278 ifq->altq_type = 0; 279 ifq->altq_disc = NULL; 280 ifq->altq_flags &= ALTQF_CANTCHANGE; 281 ifq->altq_tbr = NULL; 282 ifq->altq_ifp = ifp; 283 ifq_set_classic(ifq); 284 285 if (!SLIST_EMPTY(&domains)) 286 if_attachdomain1(ifp); 287 288 /* Announce the interface. */ 289 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 290 } 291 292 static void 293 if_attachdomain(void *dummy) 294 { 295 struct ifnet *ifp; 296 297 crit_enter(); 298 TAILQ_FOREACH(ifp, &ifnet, if_list) 299 if_attachdomain1(ifp); 300 crit_exit(); 301 } 302 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 303 if_attachdomain, NULL); 304 305 static void 306 if_attachdomain1(struct ifnet *ifp) 307 { 308 struct domain *dp; 309 310 crit_enter(); 311 312 /* address family dependent data region */ 313 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 314 SLIST_FOREACH(dp, &domains, dom_next) 315 if (dp->dom_ifattach) 316 ifp->if_afdata[dp->dom_family] = 317 (*dp->dom_ifattach)(ifp); 318 crit_exit(); 319 } 320 321 /* 322 * Purge all addresses whose type is _not_ AF_LINK 323 */ 324 void 325 if_purgeaddrs_nolink(struct ifnet *ifp) 326 { 327 struct ifaddr_container *ifac, *next; 328 329 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 330 ifa_link, next) { 331 struct ifaddr *ifa = ifac->ifa; 332 333 /* Leave link ifaddr as it is */ 334 if (ifa->ifa_addr->sa_family == AF_LINK) 335 continue; 336 #ifdef INET 337 /* XXX: Ugly!! ad hoc just for INET */ 338 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 339 struct ifaliasreq ifr; 340 #ifdef IFADDR_DEBUG_VERBOSE 341 int i; 342 343 kprintf("purge in4 addr %p: ", ifa); 344 for (i = 0; i < ncpus; ++i) 345 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 346 kprintf("\n"); 347 #endif 348 349 bzero(&ifr, sizeof ifr); 350 ifr.ifra_addr = *ifa->ifa_addr; 351 if (ifa->ifa_dstaddr) 352 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 353 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 354 NULL) == 0) 355 continue; 356 } 357 #endif /* INET */ 358 #ifdef INET6 359 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 360 #ifdef IFADDR_DEBUG_VERBOSE 361 int i; 362 363 kprintf("purge in6 addr %p: ", ifa); 364 for (i = 0; i < ncpus; ++i) 365 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 366 kprintf("\n"); 367 #endif 368 369 in6_purgeaddr(ifa); 370 /* ifp_addrhead is already updated */ 371 continue; 372 } 373 #endif /* INET6 */ 374 ifa_ifunlink(ifa, ifp); 375 ifa_destroy(ifa); 376 } 377 } 378 379 /* 380 * Detach an interface, removing it from the 381 * list of "active" interfaces. 382 */ 383 void 384 if_detach(struct ifnet *ifp) 385 { 386 struct radix_node_head *rnh; 387 int i; 388 int cpu, origcpu; 389 struct domain *dp; 390 391 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 392 393 /* 394 * Remove routes and flush queues. 395 */ 396 crit_enter(); 397 #ifdef DEVICE_POLLING 398 if (ifp->if_flags & IFF_POLLING) 399 ether_poll_deregister(ifp); 400 #endif 401 if_down(ifp); 402 403 if (ifq_is_enabled(&ifp->if_snd)) 404 altq_disable(&ifp->if_snd); 405 if (ifq_is_attached(&ifp->if_snd)) 406 altq_detach(&ifp->if_snd); 407 408 /* 409 * Clean up all addresses. 410 */ 411 ifp->if_lladdr = NULL; 412 413 if_purgeaddrs_nolink(ifp); 414 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 415 struct ifaddr *ifa; 416 417 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 418 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 419 ("non-link ifaddr is left on if_addrheads")); 420 421 ifa_ifunlink(ifa, ifp); 422 ifa_destroy(ifa); 423 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 424 ("there are still ifaddrs left on if_addrheads")); 425 } 426 427 #ifdef INET 428 /* 429 * Remove all IPv4 kernel structures related to ifp. 430 */ 431 in_ifdetach(ifp); 432 #endif 433 434 #ifdef INET6 435 /* 436 * Remove all IPv6 kernel structs related to ifp. This should be done 437 * before removing routing entries below, since IPv6 interface direct 438 * routes are expected to be removed by the IPv6-specific kernel API. 439 * Otherwise, the kernel will detect some inconsistency and bark it. 440 */ 441 in6_ifdetach(ifp); 442 #endif 443 444 /* 445 * Delete all remaining routes using this interface 446 * Unfortuneatly the only way to do this is to slog through 447 * the entire routing table looking for routes which point 448 * to this interface...oh well... 449 */ 450 origcpu = mycpuid; 451 for (cpu = 0; cpu < ncpus2; cpu++) { 452 lwkt_migratecpu(cpu); 453 for (i = 1; i <= AF_MAX; i++) { 454 if ((rnh = rt_tables[cpu][i]) == NULL) 455 continue; 456 rnh->rnh_walktree(rnh, if_rtdel, ifp); 457 } 458 } 459 lwkt_migratecpu(origcpu); 460 461 /* Announce that the interface is gone. */ 462 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 463 464 SLIST_FOREACH(dp, &domains, dom_next) 465 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 466 (*dp->dom_ifdetach)(ifp, 467 ifp->if_afdata[dp->dom_family]); 468 469 /* 470 * Remove interface from ifindex2ifp[] and maybe decrement if_index. 471 */ 472 ifindex2ifnet[ifp->if_index] = NULL; 473 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 474 if_index--; 475 476 TAILQ_REMOVE(&ifnet, ifp, if_link); 477 kfree(ifp->if_addrheads, M_IFADDR); 478 crit_exit(); 479 } 480 481 /* 482 * Delete Routes for a Network Interface 483 * 484 * Called for each routing entry via the rnh->rnh_walktree() call above 485 * to delete all route entries referencing a detaching network interface. 486 * 487 * Arguments: 488 * rn pointer to node in the routing table 489 * arg argument passed to rnh->rnh_walktree() - detaching interface 490 * 491 * Returns: 492 * 0 successful 493 * errno failed - reason indicated 494 * 495 */ 496 static int 497 if_rtdel(struct radix_node *rn, void *arg) 498 { 499 struct rtentry *rt = (struct rtentry *)rn; 500 struct ifnet *ifp = arg; 501 int err; 502 503 if (rt->rt_ifp == ifp) { 504 505 /* 506 * Protect (sorta) against walktree recursion problems 507 * with cloned routes 508 */ 509 if (!(rt->rt_flags & RTF_UP)) 510 return (0); 511 512 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 513 rt_mask(rt), rt->rt_flags, 514 (struct rtentry **) NULL); 515 if (err) { 516 log(LOG_WARNING, "if_rtdel: error %d\n", err); 517 } 518 } 519 520 return (0); 521 } 522 523 /* 524 * Locate an interface based on a complete address. 525 */ 526 struct ifaddr * 527 ifa_ifwithaddr(struct sockaddr *addr) 528 { 529 struct ifnet *ifp; 530 531 TAILQ_FOREACH(ifp, &ifnet, if_link) { 532 struct ifaddr_container *ifac; 533 534 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 535 struct ifaddr *ifa = ifac->ifa; 536 537 if (ifa->ifa_addr->sa_family != addr->sa_family) 538 continue; 539 if (sa_equal(addr, ifa->ifa_addr)) 540 return (ifa); 541 if ((ifp->if_flags & IFF_BROADCAST) && 542 ifa->ifa_broadaddr && 543 /* IPv6 doesn't have broadcast */ 544 ifa->ifa_broadaddr->sa_len != 0 && 545 sa_equal(ifa->ifa_broadaddr, addr)) 546 return (ifa); 547 } 548 } 549 return (NULL); 550 } 551 /* 552 * Locate the point to point interface with a given destination address. 553 */ 554 struct ifaddr * 555 ifa_ifwithdstaddr(struct sockaddr *addr) 556 { 557 struct ifnet *ifp; 558 559 TAILQ_FOREACH(ifp, &ifnet, if_link) { 560 struct ifaddr_container *ifac; 561 562 if (!(ifp->if_flags & IFF_POINTOPOINT)) 563 continue; 564 565 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 566 struct ifaddr *ifa = ifac->ifa; 567 568 if (ifa->ifa_addr->sa_family != addr->sa_family) 569 continue; 570 if (ifa->ifa_dstaddr && 571 sa_equal(addr, ifa->ifa_dstaddr)) 572 return (ifa); 573 } 574 } 575 return (NULL); 576 } 577 578 /* 579 * Find an interface on a specific network. If many, choice 580 * is most specific found. 581 */ 582 struct ifaddr * 583 ifa_ifwithnet(struct sockaddr *addr) 584 { 585 struct ifnet *ifp; 586 struct ifaddr *ifa_maybe = NULL; 587 u_int af = addr->sa_family; 588 char *addr_data = addr->sa_data, *cplim; 589 590 /* 591 * AF_LINK addresses can be looked up directly by their index number, 592 * so do that if we can. 593 */ 594 if (af == AF_LINK) { 595 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 596 597 if (sdl->sdl_index && sdl->sdl_index <= if_index) 598 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 599 } 600 601 /* 602 * Scan though each interface, looking for ones that have 603 * addresses in this address family. 604 */ 605 TAILQ_FOREACH(ifp, &ifnet, if_link) { 606 struct ifaddr_container *ifac; 607 608 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 609 struct ifaddr *ifa = ifac->ifa; 610 char *cp, *cp2, *cp3; 611 612 if (ifa->ifa_addr->sa_family != af) 613 next: continue; 614 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 615 /* 616 * This is a bit broken as it doesn't 617 * take into account that the remote end may 618 * be a single node in the network we are 619 * looking for. 620 * The trouble is that we don't know the 621 * netmask for the remote end. 622 */ 623 if (ifa->ifa_dstaddr != NULL && 624 sa_equal(addr, ifa->ifa_dstaddr)) 625 return (ifa); 626 } else { 627 /* 628 * if we have a special address handler, 629 * then use it instead of the generic one. 630 */ 631 if (ifa->ifa_claim_addr) { 632 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 633 return (ifa); 634 } else { 635 continue; 636 } 637 } 638 639 /* 640 * Scan all the bits in the ifa's address. 641 * If a bit dissagrees with what we are 642 * looking for, mask it with the netmask 643 * to see if it really matters. 644 * (A byte at a time) 645 */ 646 if (ifa->ifa_netmask == 0) 647 continue; 648 cp = addr_data; 649 cp2 = ifa->ifa_addr->sa_data; 650 cp3 = ifa->ifa_netmask->sa_data; 651 cplim = ifa->ifa_netmask->sa_len + 652 (char *)ifa->ifa_netmask; 653 while (cp3 < cplim) 654 if ((*cp++ ^ *cp2++) & *cp3++) 655 goto next; /* next address! */ 656 /* 657 * If the netmask of what we just found 658 * is more specific than what we had before 659 * (if we had one) then remember the new one 660 * before continuing to search 661 * for an even better one. 662 */ 663 if (ifa_maybe == 0 || 664 rn_refines((char *)ifa->ifa_netmask, 665 (char *)ifa_maybe->ifa_netmask)) 666 ifa_maybe = ifa; 667 } 668 } 669 } 670 return (ifa_maybe); 671 } 672 673 /* 674 * Find an interface address specific to an interface best matching 675 * a given address. 676 */ 677 struct ifaddr * 678 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 679 { 680 struct ifaddr_container *ifac; 681 char *cp, *cp2, *cp3; 682 char *cplim; 683 struct ifaddr *ifa_maybe = 0; 684 u_int af = addr->sa_family; 685 686 if (af >= AF_MAX) 687 return (0); 688 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 689 struct ifaddr *ifa = ifac->ifa; 690 691 if (ifa->ifa_addr->sa_family != af) 692 continue; 693 if (ifa_maybe == 0) 694 ifa_maybe = ifa; 695 if (ifa->ifa_netmask == NULL) { 696 if (sa_equal(addr, ifa->ifa_addr) || 697 (ifa->ifa_dstaddr != NULL && 698 sa_equal(addr, ifa->ifa_dstaddr))) 699 return (ifa); 700 continue; 701 } 702 if (ifp->if_flags & IFF_POINTOPOINT) { 703 if (sa_equal(addr, ifa->ifa_dstaddr)) 704 return (ifa); 705 } else { 706 cp = addr->sa_data; 707 cp2 = ifa->ifa_addr->sa_data; 708 cp3 = ifa->ifa_netmask->sa_data; 709 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 710 for (; cp3 < cplim; cp3++) 711 if ((*cp++ ^ *cp2++) & *cp3) 712 break; 713 if (cp3 == cplim) 714 return (ifa); 715 } 716 } 717 return (ifa_maybe); 718 } 719 720 /* 721 * Default action when installing a route with a Link Level gateway. 722 * Lookup an appropriate real ifa to point to. 723 * This should be moved to /sys/net/link.c eventually. 724 */ 725 static void 726 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 727 { 728 struct ifaddr *ifa; 729 struct sockaddr *dst; 730 struct ifnet *ifp; 731 732 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 733 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 734 return; 735 ifa = ifaof_ifpforaddr(dst, ifp); 736 if (ifa != NULL) { 737 IFAFREE(rt->rt_ifa); 738 IFAREF(ifa); 739 rt->rt_ifa = ifa; 740 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 741 ifa->ifa_rtrequest(cmd, rt, info); 742 } 743 } 744 745 /* 746 * Mark an interface down and notify protocols of 747 * the transition. 748 * NOTE: must be called at splnet or eqivalent. 749 */ 750 void 751 if_unroute(struct ifnet *ifp, int flag, int fam) 752 { 753 struct ifaddr_container *ifac; 754 755 ifp->if_flags &= ~flag; 756 getmicrotime(&ifp->if_lastchange); 757 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 758 struct ifaddr *ifa = ifac->ifa; 759 760 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 761 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 762 } 763 ifq_purge(&ifp->if_snd); 764 rt_ifmsg(ifp); 765 } 766 767 /* 768 * Mark an interface up and notify protocols of 769 * the transition. 770 * NOTE: must be called at splnet or eqivalent. 771 */ 772 void 773 if_route(struct ifnet *ifp, int flag, int fam) 774 { 775 struct ifaddr_container *ifac; 776 777 ifp->if_flags |= flag; 778 getmicrotime(&ifp->if_lastchange); 779 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 780 struct ifaddr *ifa = ifac->ifa; 781 782 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 783 pfctlinput(PRC_IFUP, ifa->ifa_addr); 784 } 785 rt_ifmsg(ifp); 786 #ifdef INET6 787 in6_if_up(ifp); 788 #endif 789 } 790 791 /* 792 * Mark an interface down and notify protocols of the transition. An 793 * interface going down is also considered to be a synchronizing event. 794 * We must ensure that all packet processing related to the interface 795 * has completed before we return so e.g. the caller can free the ifnet 796 * structure that the mbufs may be referencing. 797 * 798 * NOTE: must be called at splnet or eqivalent. 799 */ 800 void 801 if_down(struct ifnet *ifp) 802 { 803 if_unroute(ifp, IFF_UP, AF_UNSPEC); 804 netmsg_service_sync(); 805 } 806 807 /* 808 * Mark an interface up and notify protocols of 809 * the transition. 810 * NOTE: must be called at splnet or eqivalent. 811 */ 812 void 813 if_up(struct ifnet *ifp) 814 { 815 816 if_route(ifp, IFF_UP, AF_UNSPEC); 817 } 818 819 /* 820 * Process a link state change. 821 * NOTE: must be called at splsoftnet or equivalent. 822 */ 823 void 824 if_link_state_change(struct ifnet *ifp) 825 { 826 rt_ifmsg(ifp); 827 } 828 829 /* 830 * Handle interface watchdog timer routines. Called 831 * from softclock, we decrement timers (if set) and 832 * call the appropriate interface routine on expiration. 833 */ 834 static void 835 if_slowtimo(void *arg) 836 { 837 struct ifnet *ifp; 838 839 crit_enter(); 840 841 TAILQ_FOREACH(ifp, &ifnet, if_link) { 842 if (ifp->if_timer == 0 || --ifp->if_timer) 843 continue; 844 if (ifp->if_watchdog) { 845 if (lwkt_serialize_try(ifp->if_serializer)) { 846 (*ifp->if_watchdog)(ifp); 847 lwkt_serialize_exit(ifp->if_serializer); 848 } else { 849 /* try again next timeout */ 850 ++ifp->if_timer; 851 } 852 } 853 } 854 855 crit_exit(); 856 857 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 858 } 859 860 /* 861 * Map interface name to 862 * interface structure pointer. 863 */ 864 struct ifnet * 865 ifunit(const char *name) 866 { 867 struct ifnet *ifp; 868 869 /* 870 * Search all the interfaces for this name/number 871 */ 872 873 TAILQ_FOREACH(ifp, &ifnet, if_link) { 874 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 875 break; 876 } 877 return (ifp); 878 } 879 880 881 /* 882 * Map interface name in a sockaddr_dl to 883 * interface structure pointer. 884 */ 885 struct ifnet * 886 if_withname(struct sockaddr *sa) 887 { 888 char ifname[IFNAMSIZ+1]; 889 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 890 891 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 892 (sdl->sdl_nlen > IFNAMSIZ) ) 893 return NULL; 894 895 /* 896 * ifunit wants a null-terminated name. It may not be null-terminated 897 * in the sockaddr. We don't want to change the caller's sockaddr, 898 * and there might not be room to put the trailing null anyway, so we 899 * make a local copy that we know we can null terminate safely. 900 */ 901 902 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 903 ifname[sdl->sdl_nlen] = '\0'; 904 return ifunit(ifname); 905 } 906 907 908 /* 909 * Interface ioctls. 910 */ 911 int 912 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 913 { 914 struct ifnet *ifp; 915 struct ifreq *ifr; 916 struct ifstat *ifs; 917 int error; 918 short oif_flags; 919 int new_flags; 920 size_t namelen, onamelen; 921 char new_name[IFNAMSIZ]; 922 struct ifaddr *ifa; 923 struct sockaddr_dl *sdl; 924 925 switch (cmd) { 926 927 case SIOCGIFCONF: 928 case OSIOCGIFCONF: 929 return (ifconf(cmd, data, cred)); 930 } 931 ifr = (struct ifreq *)data; 932 933 switch (cmd) { 934 case SIOCIFCREATE: 935 case SIOCIFDESTROY: 936 if ((error = suser_cred(cred, 0)) != 0) 937 return (error); 938 return ((cmd == SIOCIFCREATE) ? 939 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) : 940 if_clone_destroy(ifr->ifr_name)); 941 942 case SIOCIFGCLONERS: 943 return (if_clone_list((struct if_clonereq *)data)); 944 } 945 946 ifp = ifunit(ifr->ifr_name); 947 if (ifp == 0) 948 return (ENXIO); 949 switch (cmd) { 950 951 case SIOCGIFFLAGS: 952 ifr->ifr_flags = ifp->if_flags; 953 ifr->ifr_flagshigh = ifp->if_flags >> 16; 954 break; 955 956 case SIOCGIFCAP: 957 ifr->ifr_reqcap = ifp->if_capabilities; 958 ifr->ifr_curcap = ifp->if_capenable; 959 break; 960 961 case SIOCGIFMETRIC: 962 ifr->ifr_metric = ifp->if_metric; 963 break; 964 965 case SIOCGIFMTU: 966 ifr->ifr_mtu = ifp->if_mtu; 967 break; 968 969 case SIOCGIFPHYS: 970 ifr->ifr_phys = ifp->if_physical; 971 break; 972 973 case SIOCGIFPOLLCPU: 974 #ifdef DEVICE_POLLING 975 ifr->ifr_pollcpu = ifp->if_poll_cpuid; 976 #else 977 ifr->ifr_pollcpu = -1; 978 #endif 979 break; 980 981 case SIOCSIFPOLLCPU: 982 #ifdef DEVICE_POLLING 983 if ((ifp->if_flags & IFF_POLLING) == 0) 984 ether_pollcpu_register(ifp, ifr->ifr_pollcpu); 985 #endif 986 break; 987 988 case SIOCSIFFLAGS: 989 error = suser_cred(cred, 0); 990 if (error) 991 return (error); 992 new_flags = (ifr->ifr_flags & 0xffff) | 993 (ifr->ifr_flagshigh << 16); 994 if (ifp->if_flags & IFF_SMART) { 995 /* Smart drivers twiddle their own routes */ 996 } else if (ifp->if_flags & IFF_UP && 997 (new_flags & IFF_UP) == 0) { 998 crit_enter(); 999 if_down(ifp); 1000 crit_exit(); 1001 } else if (new_flags & IFF_UP && 1002 (ifp->if_flags & IFF_UP) == 0) { 1003 crit_enter(); 1004 if_up(ifp); 1005 crit_exit(); 1006 } 1007 1008 #ifdef DEVICE_POLLING 1009 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) { 1010 if (new_flags & IFF_POLLING) { 1011 ether_poll_register(ifp); 1012 } else { 1013 ether_poll_deregister(ifp); 1014 } 1015 } 1016 #endif 1017 1018 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1019 (new_flags &~ IFF_CANTCHANGE); 1020 if (new_flags & IFF_PPROMISC) { 1021 /* Permanently promiscuous mode requested */ 1022 ifp->if_flags |= IFF_PROMISC; 1023 } else if (ifp->if_pcount == 0) { 1024 ifp->if_flags &= ~IFF_PROMISC; 1025 } 1026 if (ifp->if_ioctl) { 1027 lwkt_serialize_enter(ifp->if_serializer); 1028 ifp->if_ioctl(ifp, cmd, data, cred); 1029 lwkt_serialize_exit(ifp->if_serializer); 1030 } 1031 getmicrotime(&ifp->if_lastchange); 1032 break; 1033 1034 case SIOCSIFCAP: 1035 error = suser_cred(cred, 0); 1036 if (error) 1037 return (error); 1038 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 1039 return (EINVAL); 1040 lwkt_serialize_enter(ifp->if_serializer); 1041 ifp->if_ioctl(ifp, cmd, data, cred); 1042 lwkt_serialize_exit(ifp->if_serializer); 1043 break; 1044 1045 case SIOCSIFNAME: 1046 error = suser_cred(cred, 0); 1047 if (error != 0) 1048 return (error); 1049 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1050 if (error != 0) 1051 return (error); 1052 if (new_name[0] == '\0') 1053 return (EINVAL); 1054 if (ifunit(new_name) != NULL) 1055 return (EEXIST); 1056 1057 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1058 1059 /* Announce the departure of the interface. */ 1060 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1061 1062 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1063 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1064 /* XXX IFA_LOCK(ifa); */ 1065 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1066 namelen = strlen(new_name); 1067 onamelen = sdl->sdl_nlen; 1068 /* 1069 * Move the address if needed. This is safe because we 1070 * allocate space for a name of length IFNAMSIZ when we 1071 * create this in if_attach(). 1072 */ 1073 if (namelen != onamelen) { 1074 bcopy(sdl->sdl_data + onamelen, 1075 sdl->sdl_data + namelen, sdl->sdl_alen); 1076 } 1077 bcopy(new_name, sdl->sdl_data, namelen); 1078 sdl->sdl_nlen = namelen; 1079 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1080 bzero(sdl->sdl_data, onamelen); 1081 while (namelen != 0) 1082 sdl->sdl_data[--namelen] = 0xff; 1083 /* XXX IFA_UNLOCK(ifa) */ 1084 1085 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1086 1087 /* Announce the return of the interface. */ 1088 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1089 break; 1090 1091 case SIOCSIFMETRIC: 1092 error = suser_cred(cred, 0); 1093 if (error) 1094 return (error); 1095 ifp->if_metric = ifr->ifr_metric; 1096 getmicrotime(&ifp->if_lastchange); 1097 break; 1098 1099 case SIOCSIFPHYS: 1100 error = suser_cred(cred, 0); 1101 if (error) 1102 return error; 1103 if (!ifp->if_ioctl) 1104 return EOPNOTSUPP; 1105 lwkt_serialize_enter(ifp->if_serializer); 1106 error = ifp->if_ioctl(ifp, cmd, data, cred); 1107 lwkt_serialize_exit(ifp->if_serializer); 1108 if (error == 0) 1109 getmicrotime(&ifp->if_lastchange); 1110 return (error); 1111 1112 case SIOCSIFMTU: 1113 { 1114 u_long oldmtu = ifp->if_mtu; 1115 1116 error = suser_cred(cred, 0); 1117 if (error) 1118 return (error); 1119 if (ifp->if_ioctl == NULL) 1120 return (EOPNOTSUPP); 1121 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 1122 return (EINVAL); 1123 lwkt_serialize_enter(ifp->if_serializer); 1124 error = ifp->if_ioctl(ifp, cmd, data, cred); 1125 lwkt_serialize_exit(ifp->if_serializer); 1126 if (error == 0) { 1127 getmicrotime(&ifp->if_lastchange); 1128 rt_ifmsg(ifp); 1129 } 1130 /* 1131 * If the link MTU changed, do network layer specific procedure. 1132 */ 1133 if (ifp->if_mtu != oldmtu) { 1134 #ifdef INET6 1135 nd6_setmtu(ifp); 1136 #endif 1137 } 1138 return (error); 1139 } 1140 1141 case SIOCADDMULTI: 1142 case SIOCDELMULTI: 1143 error = suser_cred(cred, 0); 1144 if (error) 1145 return (error); 1146 1147 /* Don't allow group membership on non-multicast interfaces. */ 1148 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1149 return EOPNOTSUPP; 1150 1151 /* Don't let users screw up protocols' entries. */ 1152 if (ifr->ifr_addr.sa_family != AF_LINK) 1153 return EINVAL; 1154 1155 if (cmd == SIOCADDMULTI) { 1156 struct ifmultiaddr *ifma; 1157 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 1158 } else { 1159 error = if_delmulti(ifp, &ifr->ifr_addr); 1160 } 1161 if (error == 0) 1162 getmicrotime(&ifp->if_lastchange); 1163 return error; 1164 1165 case SIOCSIFPHYADDR: 1166 case SIOCDIFPHYADDR: 1167 #ifdef INET6 1168 case SIOCSIFPHYADDR_IN6: 1169 #endif 1170 case SIOCSLIFPHYADDR: 1171 case SIOCSIFMEDIA: 1172 case SIOCSIFGENERIC: 1173 error = suser_cred(cred, 0); 1174 if (error) 1175 return (error); 1176 if (ifp->if_ioctl == 0) 1177 return (EOPNOTSUPP); 1178 lwkt_serialize_enter(ifp->if_serializer); 1179 error = ifp->if_ioctl(ifp, cmd, data, cred); 1180 lwkt_serialize_exit(ifp->if_serializer); 1181 if (error == 0) 1182 getmicrotime(&ifp->if_lastchange); 1183 return error; 1184 1185 case SIOCGIFSTATUS: 1186 ifs = (struct ifstat *)data; 1187 ifs->ascii[0] = '\0'; 1188 1189 case SIOCGIFPSRCADDR: 1190 case SIOCGIFPDSTADDR: 1191 case SIOCGLIFPHYADDR: 1192 case SIOCGIFMEDIA: 1193 case SIOCGIFGENERIC: 1194 if (ifp->if_ioctl == NULL) 1195 return (EOPNOTSUPP); 1196 lwkt_serialize_enter(ifp->if_serializer); 1197 error = ifp->if_ioctl(ifp, cmd, data, cred); 1198 lwkt_serialize_exit(ifp->if_serializer); 1199 return (error); 1200 1201 case SIOCSIFLLADDR: 1202 error = suser_cred(cred, 0); 1203 if (error) 1204 return (error); 1205 return if_setlladdr(ifp, 1206 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 1207 1208 default: 1209 oif_flags = ifp->if_flags; 1210 if (so->so_proto == 0) 1211 return (EOPNOTSUPP); 1212 #ifndef COMPAT_43 1213 error = so_pru_control(so, cmd, data, ifp); 1214 #else 1215 { 1216 int ocmd = cmd; 1217 1218 switch (cmd) { 1219 1220 case SIOCSIFDSTADDR: 1221 case SIOCSIFADDR: 1222 case SIOCSIFBRDADDR: 1223 case SIOCSIFNETMASK: 1224 #if BYTE_ORDER != BIG_ENDIAN 1225 if (ifr->ifr_addr.sa_family == 0 && 1226 ifr->ifr_addr.sa_len < 16) { 1227 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1228 ifr->ifr_addr.sa_len = 16; 1229 } 1230 #else 1231 if (ifr->ifr_addr.sa_len == 0) 1232 ifr->ifr_addr.sa_len = 16; 1233 #endif 1234 break; 1235 1236 case OSIOCGIFADDR: 1237 cmd = SIOCGIFADDR; 1238 break; 1239 1240 case OSIOCGIFDSTADDR: 1241 cmd = SIOCGIFDSTADDR; 1242 break; 1243 1244 case OSIOCGIFBRDADDR: 1245 cmd = SIOCGIFBRDADDR; 1246 break; 1247 1248 case OSIOCGIFNETMASK: 1249 cmd = SIOCGIFNETMASK; 1250 } 1251 error = so_pru_control(so, cmd, data, ifp); 1252 switch (ocmd) { 1253 1254 case OSIOCGIFADDR: 1255 case OSIOCGIFDSTADDR: 1256 case OSIOCGIFBRDADDR: 1257 case OSIOCGIFNETMASK: 1258 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1259 1260 } 1261 } 1262 #endif /* COMPAT_43 */ 1263 1264 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 1265 #ifdef INET6 1266 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 1267 if (ifp->if_flags & IFF_UP) { 1268 crit_enter(); 1269 in6_if_up(ifp); 1270 crit_exit(); 1271 } 1272 #endif 1273 } 1274 return (error); 1275 1276 } 1277 return (0); 1278 } 1279 1280 /* 1281 * Set/clear promiscuous mode on interface ifp based on the truth value 1282 * of pswitch. The calls are reference counted so that only the first 1283 * "on" request actually has an effect, as does the final "off" request. 1284 * Results are undefined if the "off" and "on" requests are not matched. 1285 */ 1286 int 1287 ifpromisc(struct ifnet *ifp, int pswitch) 1288 { 1289 struct ifreq ifr; 1290 int error; 1291 int oldflags; 1292 1293 oldflags = ifp->if_flags; 1294 if (ifp->if_flags & IFF_PPROMISC) { 1295 /* Do nothing if device is in permanently promiscuous mode */ 1296 ifp->if_pcount += pswitch ? 1 : -1; 1297 return (0); 1298 } 1299 if (pswitch) { 1300 /* 1301 * If the device is not configured up, we cannot put it in 1302 * promiscuous mode. 1303 */ 1304 if ((ifp->if_flags & IFF_UP) == 0) 1305 return (ENETDOWN); 1306 if (ifp->if_pcount++ != 0) 1307 return (0); 1308 ifp->if_flags |= IFF_PROMISC; 1309 log(LOG_INFO, "%s: promiscuous mode enabled\n", 1310 ifp->if_xname); 1311 } else { 1312 if (--ifp->if_pcount > 0) 1313 return (0); 1314 ifp->if_flags &= ~IFF_PROMISC; 1315 log(LOG_INFO, "%s: promiscuous mode disabled\n", 1316 ifp->if_xname); 1317 } 1318 ifr.ifr_flags = ifp->if_flags; 1319 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1320 lwkt_serialize_enter(ifp->if_serializer); 1321 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1322 (struct ucred *)NULL); 1323 lwkt_serialize_exit(ifp->if_serializer); 1324 if (error == 0) 1325 rt_ifmsg(ifp); 1326 else 1327 ifp->if_flags = oldflags; 1328 return error; 1329 } 1330 1331 /* 1332 * Return interface configuration 1333 * of system. List may be used 1334 * in later ioctl's (above) to get 1335 * other information. 1336 */ 1337 static int 1338 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 1339 { 1340 struct ifconf *ifc = (struct ifconf *)data; 1341 struct ifnet *ifp; 1342 struct sockaddr *sa; 1343 struct ifreq ifr, *ifrp; 1344 int space = ifc->ifc_len, error = 0; 1345 1346 ifrp = ifc->ifc_req; 1347 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1348 struct ifaddr_container *ifac; 1349 int addrs; 1350 1351 if (space <= sizeof ifr) 1352 break; 1353 1354 /* 1355 * Zero the stack declared structure first to prevent 1356 * memory disclosure. 1357 */ 1358 bzero(&ifr, sizeof(ifr)); 1359 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 1360 >= sizeof(ifr.ifr_name)) { 1361 error = ENAMETOOLONG; 1362 break; 1363 } 1364 1365 addrs = 0; 1366 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1367 struct ifaddr *ifa = ifac->ifa; 1368 1369 if (space <= sizeof ifr) 1370 break; 1371 sa = ifa->ifa_addr; 1372 if (cred->cr_prison && 1373 prison_if(cred, sa)) 1374 continue; 1375 addrs++; 1376 #ifdef COMPAT_43 1377 if (cmd == OSIOCGIFCONF) { 1378 struct osockaddr *osa = 1379 (struct osockaddr *)&ifr.ifr_addr; 1380 ifr.ifr_addr = *sa; 1381 osa->sa_family = sa->sa_family; 1382 error = copyout(&ifr, ifrp, sizeof ifr); 1383 ifrp++; 1384 } else 1385 #endif 1386 if (sa->sa_len <= sizeof(*sa)) { 1387 ifr.ifr_addr = *sa; 1388 error = copyout(&ifr, ifrp, sizeof ifr); 1389 ifrp++; 1390 } else { 1391 if (space < (sizeof ifr) + sa->sa_len - 1392 sizeof(*sa)) 1393 break; 1394 space -= sa->sa_len - sizeof(*sa); 1395 error = copyout(&ifr, ifrp, 1396 sizeof ifr.ifr_name); 1397 if (error == 0) 1398 error = copyout(sa, &ifrp->ifr_addr, 1399 sa->sa_len); 1400 ifrp = (struct ifreq *) 1401 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 1402 } 1403 if (error) 1404 break; 1405 space -= sizeof ifr; 1406 } 1407 if (error) 1408 break; 1409 if (!addrs) { 1410 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 1411 error = copyout(&ifr, ifrp, sizeof ifr); 1412 if (error) 1413 break; 1414 space -= sizeof ifr; 1415 ifrp++; 1416 } 1417 } 1418 ifc->ifc_len -= space; 1419 return (error); 1420 } 1421 1422 /* 1423 * Just like if_promisc(), but for all-multicast-reception mode. 1424 */ 1425 int 1426 if_allmulti(struct ifnet *ifp, int onswitch) 1427 { 1428 int error = 0; 1429 struct ifreq ifr; 1430 1431 crit_enter(); 1432 1433 if (onswitch) { 1434 if (ifp->if_amcount++ == 0) { 1435 ifp->if_flags |= IFF_ALLMULTI; 1436 ifr.ifr_flags = ifp->if_flags; 1437 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1438 lwkt_serialize_enter(ifp->if_serializer); 1439 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1440 (struct ucred *)NULL); 1441 lwkt_serialize_exit(ifp->if_serializer); 1442 } 1443 } else { 1444 if (ifp->if_amcount > 1) { 1445 ifp->if_amcount--; 1446 } else { 1447 ifp->if_amcount = 0; 1448 ifp->if_flags &= ~IFF_ALLMULTI; 1449 ifr.ifr_flags = ifp->if_flags; 1450 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1451 lwkt_serialize_enter(ifp->if_serializer); 1452 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1453 (struct ucred *)NULL); 1454 lwkt_serialize_exit(ifp->if_serializer); 1455 } 1456 } 1457 1458 crit_exit(); 1459 1460 if (error == 0) 1461 rt_ifmsg(ifp); 1462 return error; 1463 } 1464 1465 /* 1466 * Add a multicast listenership to the interface in question. 1467 * The link layer provides a routine which converts 1468 */ 1469 int 1470 if_addmulti( 1471 struct ifnet *ifp, /* interface to manipulate */ 1472 struct sockaddr *sa, /* address to add */ 1473 struct ifmultiaddr **retifma) 1474 { 1475 struct sockaddr *llsa, *dupsa; 1476 int error; 1477 struct ifmultiaddr *ifma; 1478 1479 /* 1480 * If the matching multicast address already exists 1481 * then don't add a new one, just add a reference 1482 */ 1483 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1484 if (sa_equal(sa, ifma->ifma_addr)) { 1485 ifma->ifma_refcount++; 1486 if (retifma) 1487 *retifma = ifma; 1488 return 0; 1489 } 1490 } 1491 1492 /* 1493 * Give the link layer a chance to accept/reject it, and also 1494 * find out which AF_LINK address this maps to, if it isn't one 1495 * already. 1496 */ 1497 if (ifp->if_resolvemulti) { 1498 lwkt_serialize_enter(ifp->if_serializer); 1499 error = ifp->if_resolvemulti(ifp, &llsa, sa); 1500 lwkt_serialize_exit(ifp->if_serializer); 1501 if (error) 1502 return error; 1503 } else { 1504 llsa = 0; 1505 } 1506 1507 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK); 1508 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK); 1509 bcopy(sa, dupsa, sa->sa_len); 1510 1511 ifma->ifma_addr = dupsa; 1512 ifma->ifma_lladdr = llsa; 1513 ifma->ifma_ifp = ifp; 1514 ifma->ifma_refcount = 1; 1515 ifma->ifma_protospec = 0; 1516 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 1517 1518 /* 1519 * Some network interfaces can scan the address list at 1520 * interrupt time; lock them out. 1521 */ 1522 crit_enter(); 1523 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 1524 crit_exit(); 1525 *retifma = ifma; 1526 1527 if (llsa != 0) { 1528 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1529 if (sa_equal(ifma->ifma_addr, llsa)) 1530 break; 1531 } 1532 if (ifma) { 1533 ifma->ifma_refcount++; 1534 } else { 1535 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, 1536 M_IFMADDR, M_WAITOK); 1537 MALLOC(dupsa, struct sockaddr *, llsa->sa_len, 1538 M_IFMADDR, M_WAITOK); 1539 bcopy(llsa, dupsa, llsa->sa_len); 1540 ifma->ifma_addr = dupsa; 1541 ifma->ifma_ifp = ifp; 1542 ifma->ifma_refcount = 1; 1543 crit_enter(); 1544 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 1545 crit_exit(); 1546 } 1547 } 1548 /* 1549 * We are certain we have added something, so call down to the 1550 * interface to let them know about it. 1551 */ 1552 crit_enter(); 1553 lwkt_serialize_enter(ifp->if_serializer); 1554 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL); 1555 lwkt_serialize_exit(ifp->if_serializer); 1556 crit_exit(); 1557 1558 return 0; 1559 } 1560 1561 /* 1562 * Remove a reference to a multicast address on this interface. Yell 1563 * if the request does not match an existing membership. 1564 */ 1565 int 1566 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 1567 { 1568 struct ifmultiaddr *ifma; 1569 1570 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 1571 if (sa_equal(sa, ifma->ifma_addr)) 1572 break; 1573 if (ifma == 0) 1574 return ENOENT; 1575 1576 if (ifma->ifma_refcount > 1) { 1577 ifma->ifma_refcount--; 1578 return 0; 1579 } 1580 1581 rt_newmaddrmsg(RTM_DELMADDR, ifma); 1582 sa = ifma->ifma_lladdr; 1583 crit_enter(); 1584 LIST_REMOVE(ifma, ifma_link); 1585 /* 1586 * Make sure the interface driver is notified 1587 * in the case of a link layer mcast group being left. 1588 */ 1589 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) { 1590 lwkt_serialize_enter(ifp->if_serializer); 1591 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL); 1592 lwkt_serialize_exit(ifp->if_serializer); 1593 } 1594 crit_exit(); 1595 kfree(ifma->ifma_addr, M_IFMADDR); 1596 kfree(ifma, M_IFMADDR); 1597 if (sa == 0) 1598 return 0; 1599 1600 /* 1601 * Now look for the link-layer address which corresponds to 1602 * this network address. It had been squirreled away in 1603 * ifma->ifma_lladdr for this purpose (so we don't have 1604 * to call ifp->if_resolvemulti() again), and we saved that 1605 * value in sa above. If some nasty deleted the 1606 * link-layer address out from underneath us, we can deal because 1607 * the address we stored was is not the same as the one which was 1608 * in the record for the link-layer address. (So we don't complain 1609 * in that case.) 1610 */ 1611 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 1612 if (sa_equal(sa, ifma->ifma_addr)) 1613 break; 1614 if (ifma == 0) 1615 return 0; 1616 1617 if (ifma->ifma_refcount > 1) { 1618 ifma->ifma_refcount--; 1619 return 0; 1620 } 1621 1622 crit_enter(); 1623 lwkt_serialize_enter(ifp->if_serializer); 1624 LIST_REMOVE(ifma, ifma_link); 1625 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL); 1626 lwkt_serialize_exit(ifp->if_serializer); 1627 crit_exit(); 1628 kfree(ifma->ifma_addr, M_IFMADDR); 1629 kfree(sa, M_IFMADDR); 1630 kfree(ifma, M_IFMADDR); 1631 1632 return 0; 1633 } 1634 1635 /* 1636 * Set the link layer address on an interface. 1637 * 1638 * At this time we only support certain types of interfaces, 1639 * and we don't allow the length of the address to change. 1640 */ 1641 int 1642 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 1643 { 1644 struct sockaddr_dl *sdl; 1645 struct ifreq ifr; 1646 1647 sdl = IF_LLSOCKADDR(ifp); 1648 if (sdl == NULL) 1649 return (EINVAL); 1650 if (len != sdl->sdl_alen) /* don't allow length to change */ 1651 return (EINVAL); 1652 switch (ifp->if_type) { 1653 case IFT_ETHER: /* these types use struct arpcom */ 1654 case IFT_XETHER: 1655 case IFT_L2VLAN: 1656 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 1657 bcopy(lladdr, LLADDR(sdl), len); 1658 break; 1659 default: 1660 return (ENODEV); 1661 } 1662 /* 1663 * If the interface is already up, we need 1664 * to re-init it in order to reprogram its 1665 * address filter. 1666 */ 1667 lwkt_serialize_enter(ifp->if_serializer); 1668 if ((ifp->if_flags & IFF_UP) != 0) { 1669 struct ifaddr_container *ifac; 1670 1671 ifp->if_flags &= ~IFF_UP; 1672 ifr.ifr_flags = ifp->if_flags; 1673 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1674 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1675 (struct ucred *)NULL); 1676 ifp->if_flags |= IFF_UP; 1677 ifr.ifr_flags = ifp->if_flags; 1678 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1679 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1680 (struct ucred *)NULL); 1681 #ifdef INET 1682 /* 1683 * Also send gratuitous ARPs to notify other nodes about 1684 * the address change. 1685 */ 1686 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1687 struct ifaddr *ifa = ifac->ifa; 1688 1689 if (ifa->ifa_addr != NULL && 1690 ifa->ifa_addr->sa_family == AF_INET) 1691 arp_ifinit(ifp, ifa); 1692 } 1693 #endif 1694 } 1695 lwkt_serialize_exit(ifp->if_serializer); 1696 return (0); 1697 } 1698 1699 struct ifmultiaddr * 1700 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 1701 { 1702 struct ifmultiaddr *ifma; 1703 1704 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 1705 if (sa_equal(ifma->ifma_addr, sa)) 1706 break; 1707 1708 return ifma; 1709 } 1710 1711 /* 1712 * This function locates the first real ethernet MAC from a network 1713 * card and loads it into node, returning 0 on success or ENOENT if 1714 * no suitable interfaces were found. It is used by the uuid code to 1715 * generate a unique 6-byte number. 1716 */ 1717 int 1718 if_getanyethermac(uint16_t *node, int minlen) 1719 { 1720 struct ifnet *ifp; 1721 struct sockaddr_dl *sdl; 1722 1723 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1724 if (ifp->if_type != IFT_ETHER) 1725 continue; 1726 sdl = IF_LLSOCKADDR(ifp); 1727 if (sdl->sdl_alen < minlen) 1728 continue; 1729 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 1730 minlen); 1731 return(0); 1732 } 1733 return (ENOENT); 1734 } 1735 1736 /* 1737 * The name argument must be a pointer to storage which will last as 1738 * long as the interface does. For physical devices, the result of 1739 * device_get_name(dev) is a good choice and for pseudo-devices a 1740 * static string works well. 1741 */ 1742 void 1743 if_initname(struct ifnet *ifp, const char *name, int unit) 1744 { 1745 ifp->if_dname = name; 1746 ifp->if_dunit = unit; 1747 if (unit != IF_DUNIT_NONE) 1748 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 1749 else 1750 strlcpy(ifp->if_xname, name, IFNAMSIZ); 1751 } 1752 1753 int 1754 if_printf(struct ifnet *ifp, const char *fmt, ...) 1755 { 1756 __va_list ap; 1757 int retval; 1758 1759 retval = kprintf("%s: ", ifp->if_xname); 1760 __va_start(ap, fmt); 1761 retval += kvprintf(fmt, ap); 1762 __va_end(ap); 1763 return (retval); 1764 } 1765 1766 void 1767 ifq_set_classic(struct ifaltq *ifq) 1768 { 1769 ifq->altq_enqueue = ifq_classic_enqueue; 1770 ifq->altq_dequeue = ifq_classic_dequeue; 1771 ifq->altq_request = ifq_classic_request; 1772 } 1773 1774 static int 1775 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m, 1776 struct altq_pktattr *pa __unused) 1777 { 1778 crit_enter(); 1779 if (IF_QFULL(ifq)) { 1780 m_freem(m); 1781 crit_exit(); 1782 return(ENOBUFS); 1783 } else { 1784 IF_ENQUEUE(ifq, m); 1785 crit_exit(); 1786 return(0); 1787 } 1788 } 1789 1790 static struct mbuf * 1791 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op) 1792 { 1793 struct mbuf *m; 1794 1795 crit_enter(); 1796 switch (op) { 1797 case ALTDQ_POLL: 1798 IF_POLL(ifq, m); 1799 break; 1800 case ALTDQ_REMOVE: 1801 IF_DEQUEUE(ifq, m); 1802 break; 1803 default: 1804 panic("unsupported ALTQ dequeue op: %d", op); 1805 } 1806 crit_exit(); 1807 KKASSERT(mpolled == NULL || mpolled == m); 1808 return(m); 1809 } 1810 1811 static int 1812 ifq_classic_request(struct ifaltq *ifq, int req, void *arg) 1813 { 1814 crit_enter(); 1815 switch (req) { 1816 case ALTRQ_PURGE: 1817 IF_DRAIN(ifq); 1818 break; 1819 default: 1820 panic("unsupported ALTQ request: %d", req); 1821 } 1822 crit_exit(); 1823 return(0); 1824 } 1825 1826 void * 1827 ifa_create(int size, int flags) 1828 { 1829 struct ifaddr *ifa; 1830 int i; 1831 1832 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small\n")); 1833 1834 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO); 1835 if (ifa == NULL) 1836 return NULL; 1837 1838 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container), 1839 M_IFADDR, M_WAITOK | M_ZERO); 1840 ifa->ifa_cpumask = smp_active_mask; 1841 for (i = 0; i < ncpus; ++i) { 1842 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 1843 1844 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 1845 ifac->ifa = ifa; 1846 ifac->ifa_refcnt = 1; 1847 } 1848 #ifdef IFADDR_DEBUG 1849 kprintf("alloc ifa %p %d\n", ifa, size); 1850 #endif 1851 return ifa; 1852 } 1853 1854 struct ifac_free_arg { 1855 struct ifaddr *ifa; 1856 int cpuid; 1857 }; 1858 1859 static void 1860 ifac_free_dispatch(struct netmsg *nmsg) 1861 { 1862 struct lwkt_msg *msg = &nmsg->nm_lmsg; 1863 struct ifac_free_arg *arg = msg->u.ms_resultp; 1864 struct ifaddr *ifa = arg->ifa; 1865 1866 ifa->ifa_cpumask &= ~(1 << arg->cpuid); 1867 if (ifa->ifa_cpumask == 0) { 1868 #ifdef IFADDR_DEBUG 1869 kprintf("free ifa %p\n", ifa); 1870 #endif 1871 kfree(ifa->ifa_containers, M_IFADDR); 1872 kfree(ifa, M_IFADDR); 1873 } 1874 lwkt_replymsg(msg, 0); 1875 } 1876 1877 void 1878 ifac_free(struct ifaddr_container *ifac, int cpu_id) 1879 { 1880 struct ifac_free_arg arg; 1881 struct netmsg nmsg; 1882 struct lwkt_msg *msg; 1883 1884 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 1885 KKASSERT(ifac->ifa_refcnt == 0); 1886 1887 ifac->ifa_magic = IFA_CONTAINER_DEAD; 1888 1889 bzero(&arg, sizeof(arg)); 1890 arg.ifa = ifac->ifa; 1891 arg.cpuid = cpu_id; 1892 #ifdef IFADDR_DEBUG_VERBOSE 1893 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, arg.cpuid); 1894 #endif 1895 1896 netmsg_init(&nmsg, &curthread->td_msgport, 0, ifac_free_dispatch); 1897 msg = &nmsg.nm_lmsg; 1898 msg->u.ms_resultp = &arg; 1899 1900 lwkt_domsg(ifa_portfn(0), msg, 0); 1901 } 1902 1903 static __inline void 1904 ifa_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 1905 { 1906 if (next_cpu < ncpus) 1907 lwkt_forwardmsg(ifa_portfn(next_cpu), lmsg); 1908 else 1909 lwkt_replymsg(lmsg, 0); 1910 } 1911 1912 static void 1913 ifa_iflink_dispatch(struct netmsg *nmsg) 1914 { 1915 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 1916 struct ifaddr *ifa = msg->ifa; 1917 struct ifnet *ifp = msg->ifp; 1918 int cpu = mycpuid; 1919 1920 crit_enter(); 1921 if (msg->tail) { 1922 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], 1923 &ifa->ifa_containers[cpu], ifa_link); 1924 } else { 1925 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], 1926 &ifa->ifa_containers[cpu], ifa_link); 1927 } 1928 crit_exit(); 1929 1930 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 1931 } 1932 1933 void 1934 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 1935 { 1936 struct netmsg_ifaddr msg; 1937 1938 netmsg_init(&msg.netmsg, &curthread->td_msgport, 0, 1939 ifa_iflink_dispatch); 1940 msg.ifa = ifa; 1941 msg.ifp = ifp; 1942 msg.tail = tail; 1943 1944 lwkt_domsg(ifa_portfn(0), &msg.netmsg.nm_lmsg, 0); 1945 } 1946 1947 static void 1948 ifa_ifunlink_dispatch(struct netmsg *nmsg) 1949 { 1950 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 1951 struct ifaddr *ifa = msg->ifa; 1952 struct ifnet *ifp = msg->ifp; 1953 int cpu = mycpuid; 1954 1955 crit_enter(); 1956 TAILQ_REMOVE(&ifp->if_addrheads[cpu], 1957 &ifa->ifa_containers[cpu], ifa_link); 1958 crit_exit(); 1959 1960 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 1961 } 1962 1963 void 1964 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 1965 { 1966 struct netmsg_ifaddr msg; 1967 1968 netmsg_init(&msg.netmsg, &curthread->td_msgport, 0, 1969 ifa_ifunlink_dispatch); 1970 msg.ifa = ifa; 1971 msg.ifp = ifp; 1972 1973 lwkt_domsg(ifa_portfn(0), &msg.netmsg.nm_lmsg, 0); 1974 } 1975 1976 static void 1977 ifa_destroy_dispatch(struct netmsg *nmsg) 1978 { 1979 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 1980 1981 IFAFREE(msg->ifa); 1982 ifa_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1); 1983 } 1984 1985 void 1986 ifa_destroy(struct ifaddr *ifa) 1987 { 1988 struct netmsg_ifaddr msg; 1989 1990 netmsg_init(&msg.netmsg, &curthread->td_msgport, 0, 1991 ifa_destroy_dispatch); 1992 msg.ifa = ifa; 1993 1994 lwkt_domsg(ifa_portfn(0), &msg.netmsg.nm_lmsg, 0); 1995 } 1996 1997 struct lwkt_port * 1998 ifa_portfn(int cpu) 1999 { 2000 return &ifaddr_threads[cpu].td_msgport; 2001 } 2002 2003 static void 2004 ifaddrinit(void *dummy __unused) 2005 { 2006 int i; 2007 2008 for (i = 0; i < ncpus; ++i) { 2009 struct thread *thr = &ifaddr_threads[i]; 2010 2011 lwkt_create(netmsg_service_loop_mpsafe, NULL, NULL, thr, 0, i, 2012 "ifaddr %d", i); 2013 netmsg_service_port_init(&thr->td_msgport); 2014 } 2015 } 2016