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sys/netgraph/ng_iface.c
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1 /* 2 * ng_iface.c 3 */ 4 5 /*- 6 * Copyright (c) 1996-1999 Whistle Communications, Inc. 7 * All rights reserved. 8 * 9 * Subject to the following obligations and disclaimer of warranty, use and 10 * redistribution of this software, in source or object code forms, with or 11 * without modifications are expressly permitted by Whistle Communications; 12 * provided, however, that: 13 * 1. Any and all reproductions of the source or object code must include the 14 * copyright notice above and the following disclaimer of warranties; and 15 * 2. No rights are granted, in any manner or form, to use Whistle 16 * Communications, Inc. trademarks, including the mark "WHISTLE 17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 18 * such appears in the above copyright notice or in the software. 19 * 20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 36 * OF SUCH DAMAGE. 37 * 38 * Author: Archie Cobbs <archie@freebsd.org> 39 * 40 * $FreeBSD: releng/6.0/sys/netgraph/ng_iface.c 149443 2005-08-25 05:01:24Z rwatson $ 41 * $Whistle: ng_iface.c,v 1.33 1999/11/01 09:24:51 julian Exp $ 42 */ 43 44 /* 45 * This node is also a system networking interface. It has 46 * a hook for each protocol (IP, AppleTalk, IPX, etc). Packets 47 * are simply relayed between the interface and the hooks. 48 * 49 * Interfaces are named ng0, ng1, etc. New nodes take the 50 * first available interface name. 51 * 52 * This node also includes Berkeley packet filter support. 53 */ 54 55 #include "opt_atalk.h" 56 #include "opt_inet.h" 57 #include "opt_inet6.h" 58 #include "opt_ipx.h" 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/errno.h> 63 #include <sys/kernel.h> 64 #include <sys/malloc.h> 65 #include <sys/mbuf.h> 66 #include <sys/errno.h> 67 #include <sys/random.h> 68 #include <sys/sockio.h> 69 #include <sys/socket.h> 70 #include <sys/syslog.h> 71 #include <sys/libkern.h> 72 73 #include <net/if.h> 74 #include <net/if_types.h> 75 #include <net/bpf.h> 76 #include <net/netisr.h> 77 78 #include <netinet/in.h> 79 80 #include <netgraph/ng_message.h> 81 #include <netgraph/netgraph.h> 82 #include <netgraph/ng_parse.h> 83 #include <netgraph/ng_iface.h> 84 #include <netgraph/ng_cisco.h> 85 86 #ifdef NG_SEPARATE_MALLOC 87 MALLOC_DEFINE(M_NETGRAPH_IFACE, "netgraph_iface", "netgraph iface node "); 88 #else 89 #define M_NETGRAPH_IFACE M_NETGRAPH 90 #endif 91 92 /* This struct describes one address family */ 93 struct iffam { 94 sa_family_t family; /* Address family */ 95 const char *hookname; /* Name for hook */ 96 }; 97 typedef const struct iffam *iffam_p; 98 99 /* List of address families supported by our interface */ 100 const static struct iffam gFamilies[] = { 101 { AF_INET, NG_IFACE_HOOK_INET }, 102 { AF_INET6, NG_IFACE_HOOK_INET6 }, 103 { AF_APPLETALK, NG_IFACE_HOOK_ATALK }, 104 { AF_IPX, NG_IFACE_HOOK_IPX }, 105 { AF_ATM, NG_IFACE_HOOK_ATM }, 106 { AF_NATM, NG_IFACE_HOOK_NATM }, 107 }; 108 #define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies)) 109 110 /* Node private data */ 111 struct ng_iface_private { 112 struct ifnet *ifp; /* Our interface */ 113 int unit; /* Interface unit number */ 114 node_p node; /* Our netgraph node */ 115 hook_p hooks[NUM_FAMILIES]; /* Hook for each address family */ 116 }; 117 typedef struct ng_iface_private *priv_p; 118 119 /* Interface methods */ 120 static void ng_iface_start(struct ifnet *ifp); 121 static int ng_iface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 122 static int ng_iface_output(struct ifnet *ifp, struct mbuf *m0, 123 struct sockaddr *dst, struct rtentry *rt0); 124 static void ng_iface_bpftap(struct ifnet *ifp, 125 struct mbuf *m, sa_family_t family); 126 #ifdef DEBUG 127 static void ng_iface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 128 #endif 129 130 /* Netgraph methods */ 131 static int ng_iface_mod_event(module_t, int, void *); 132 static ng_constructor_t ng_iface_constructor; 133 static ng_rcvmsg_t ng_iface_rcvmsg; 134 static ng_shutdown_t ng_iface_shutdown; 135 static ng_newhook_t ng_iface_newhook; 136 static ng_rcvdata_t ng_iface_rcvdata; 137 static ng_disconnect_t ng_iface_disconnect; 138 139 /* Helper stuff */ 140 static iffam_p get_iffam_from_af(sa_family_t family); 141 static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook); 142 static iffam_p get_iffam_from_name(const char *name); 143 static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam); 144 145 /* Parse type for struct ng_cisco_ipaddr */ 146 static const struct ng_parse_struct_field ng_cisco_ipaddr_type_fields[] 147 = NG_CISCO_IPADDR_TYPE_INFO; 148 static const struct ng_parse_type ng_cisco_ipaddr_type = { 149 &ng_parse_struct_type, 150 &ng_cisco_ipaddr_type_fields 151 }; 152 153 /* List of commands and how to convert arguments to/from ASCII */ 154 static const struct ng_cmdlist ng_iface_cmds[] = { 155 { 156 NGM_IFACE_COOKIE, 157 NGM_IFACE_GET_IFNAME, 158 "getifname", 159 NULL, 160 &ng_parse_string_type 161 }, 162 { 163 NGM_IFACE_COOKIE, 164 NGM_IFACE_POINT2POINT, 165 "point2point", 166 NULL, 167 NULL 168 }, 169 { 170 NGM_IFACE_COOKIE, 171 NGM_IFACE_BROADCAST, 172 "broadcast", 173 NULL, 174 NULL 175 }, 176 { 177 NGM_CISCO_COOKIE, 178 NGM_CISCO_GET_IPADDR, 179 "getipaddr", 180 NULL, 181 &ng_cisco_ipaddr_type 182 }, 183 { 184 NGM_IFACE_COOKIE, 185 NGM_IFACE_GET_IFINDEX, 186 "getifindex", 187 NULL, 188 &ng_parse_uint32_type 189 }, 190 { 0 } 191 }; 192 193 /* Node type descriptor */ 194 static struct ng_type typestruct = { 195 .version = NG_ABI_VERSION, 196 .name = NG_IFACE_NODE_TYPE, 197 .mod_event = ng_iface_mod_event, 198 .constructor = ng_iface_constructor, 199 .rcvmsg = ng_iface_rcvmsg, 200 .shutdown = ng_iface_shutdown, 201 .newhook = ng_iface_newhook, 202 .rcvdata = ng_iface_rcvdata, 203 .disconnect = ng_iface_disconnect, 204 .cmdlist = ng_iface_cmds, 205 }; 206 NETGRAPH_INIT(iface, &typestruct); 207 208 static struct unrhdr *ng_iface_unit; 209 210 /************************************************************************ 211 HELPER STUFF 212 ************************************************************************/ 213 214 /* 215 * Get the family descriptor from the family ID 216 */ 217 static __inline iffam_p 218 get_iffam_from_af(sa_family_t family) 219 { 220 iffam_p iffam; 221 int k; 222 223 for (k = 0; k < NUM_FAMILIES; k++) { 224 iffam = &gFamilies[k]; 225 if (iffam->family == family) 226 return (iffam); 227 } 228 return (NULL); 229 } 230 231 /* 232 * Get the family descriptor from the hook 233 */ 234 static __inline iffam_p 235 get_iffam_from_hook(priv_p priv, hook_p hook) 236 { 237 int k; 238 239 for (k = 0; k < NUM_FAMILIES; k++) 240 if (priv->hooks[k] == hook) 241 return (&gFamilies[k]); 242 return (NULL); 243 } 244 245 /* 246 * Get the hook from the iffam descriptor 247 */ 248 249 static __inline hook_p * 250 get_hook_from_iffam(priv_p priv, iffam_p iffam) 251 { 252 return (&priv->hooks[iffam - gFamilies]); 253 } 254 255 /* 256 * Get the iffam descriptor from the name 257 */ 258 static __inline iffam_p 259 get_iffam_from_name(const char *name) 260 { 261 iffam_p iffam; 262 int k; 263 264 for (k = 0; k < NUM_FAMILIES; k++) { 265 iffam = &gFamilies[k]; 266 if (!strcmp(iffam->hookname, name)) 267 return (iffam); 268 } 269 return (NULL); 270 } 271 272 /************************************************************************ 273 INTERFACE STUFF 274 ************************************************************************/ 275 276 /* 277 * Process an ioctl for the virtual interface 278 */ 279 static int 280 ng_iface_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 281 { 282 struct ifreq *const ifr = (struct ifreq *) data; 283 int s, error = 0; 284 285 #ifdef DEBUG 286 ng_iface_print_ioctl(ifp, command, data); 287 #endif 288 s = splimp(); 289 switch (command) { 290 291 /* These two are mostly handled at a higher layer */ 292 case SIOCSIFADDR: 293 ifp->if_flags |= IFF_UP; 294 ifp->if_drv_flags |= IFF_DRV_RUNNING; 295 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE); 296 break; 297 case SIOCGIFADDR: 298 break; 299 300 /* Set flags */ 301 case SIOCSIFFLAGS: 302 /* 303 * If the interface is marked up and stopped, then start it. 304 * If it is marked down and running, then stop it. 305 */ 306 if (ifr->ifr_flags & IFF_UP) { 307 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 308 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE); 309 ifp->if_drv_flags |= IFF_DRV_RUNNING; 310 } 311 } else { 312 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 313 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | 314 IFF_DRV_OACTIVE); 315 } 316 break; 317 318 /* Set the interface MTU */ 319 case SIOCSIFMTU: 320 if (ifr->ifr_mtu > NG_IFACE_MTU_MAX 321 || ifr->ifr_mtu < NG_IFACE_MTU_MIN) 322 error = EINVAL; 323 else 324 ifp->if_mtu = ifr->ifr_mtu; 325 break; 326 327 /* Stuff that's not supported */ 328 case SIOCADDMULTI: 329 case SIOCDELMULTI: 330 error = 0; 331 break; 332 case SIOCSIFPHYS: 333 error = EOPNOTSUPP; 334 break; 335 336 default: 337 error = EINVAL; 338 break; 339 } 340 (void) splx(s); 341 return (error); 342 } 343 344 /* 345 * This routine is called to deliver a packet out the interface. 346 * We simply look at the address family and relay the packet to 347 * the corresponding hook, if it exists and is connected. 348 */ 349 350 static int 351 ng_iface_output(struct ifnet *ifp, struct mbuf *m, 352 struct sockaddr *dst, struct rtentry *rt0) 353 { 354 const priv_p priv = (priv_p) ifp->if_softc; 355 const iffam_p iffam = get_iffam_from_af(dst->sa_family); 356 int len, error = 0; 357 u_int32_t af; 358 359 /* Check interface flags */ 360 if (!((ifp->if_flags & IFF_UP) && 361 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 362 m_freem(m); 363 return (ENETDOWN); 364 } 365 366 /* BPF writes need to be handled specially. */ 367 if (dst->sa_family == AF_UNSPEC) { 368 bcopy(dst->sa_data, &af, sizeof(af)); 369 dst->sa_family = af; 370 } 371 372 /* Berkeley packet filter */ 373 ng_iface_bpftap(ifp, m, dst->sa_family); 374 375 /* Check address family to determine hook (if known) */ 376 if (iffam == NULL) { 377 m_freem(m); 378 log(LOG_WARNING, "%s: can't handle af%d\n", 379 ifp->if_xname, (int)dst->sa_family); 380 return (EAFNOSUPPORT); 381 } 382 383 /* Copy length before the mbuf gets invalidated */ 384 len = m->m_pkthdr.len; 385 386 /* Send packet; if hook is not connected, mbuf will get freed. */ 387 NG_SEND_DATA_ONLY(error, *get_hook_from_iffam(priv, iffam), m); 388 389 /* Update stats */ 390 if (error == 0) { 391 ifp->if_obytes += len; 392 ifp->if_opackets++; 393 } 394 return (error); 395 } 396 397 /* 398 * This routine should never be called 399 */ 400 401 static void 402 ng_iface_start(struct ifnet *ifp) 403 { 404 if_printf(ifp, "%s called?", __func__); 405 } 406 407 /* 408 * Flash a packet by the BPF (requires prepending 4 byte AF header) 409 * Note the phoney mbuf; this is OK because BPF treats it read-only. 410 */ 411 static void 412 ng_iface_bpftap(struct ifnet *ifp, struct mbuf *m, sa_family_t family) 413 { 414 KASSERT(family != AF_UNSPEC, ("%s: family=AF_UNSPEC", __func__)); 415 if (ifp->if_bpf != NULL) { 416 int32_t family4 = (int32_t)family; 417 bpf_mtap2(ifp->if_bpf, &family4, sizeof(family4), m); 418 } 419 } 420 421 #ifdef DEBUG 422 /* 423 * Display an ioctl to the virtual interface 424 */ 425 426 static void 427 ng_iface_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 428 { 429 char *str; 430 431 switch (command & IOC_DIRMASK) { 432 case IOC_VOID: 433 str = "IO"; 434 break; 435 case IOC_OUT: 436 str = "IOR"; 437 break; 438 case IOC_IN: 439 str = "IOW"; 440 break; 441 case IOC_INOUT: 442 str = "IORW"; 443 break; 444 default: 445 str = "IO??"; 446 } 447 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 448 ifp->if_xname, 449 str, 450 IOCGROUP(command), 451 command & 0xff, 452 IOCPARM_LEN(command)); 453 } 454 #endif /* DEBUG */ 455 456 /************************************************************************ 457 NETGRAPH NODE STUFF 458 ************************************************************************/ 459 460 /* 461 * Constructor for a node 462 */ 463 static int 464 ng_iface_constructor(node_p node) 465 { 466 struct ifnet *ifp; 467 priv_p priv; 468 469 /* Allocate node and interface private structures */ 470 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_IFACE, M_NOWAIT|M_ZERO); 471 if (priv == NULL) 472 return (ENOMEM); 473 ifp = if_alloc(IFT_PROPVIRTUAL); 474 if (ifp == NULL) { 475 FREE(priv, M_NETGRAPH_IFACE); 476 return (ENOMEM); 477 } 478 479 /* Link them together */ 480 ifp->if_softc = priv; 481 priv->ifp = ifp; 482 483 /* Get an interface unit number */ 484 priv->unit = alloc_unr(ng_iface_unit); 485 486 /* Link together node and private info */ 487 NG_NODE_SET_PRIVATE(node, priv); 488 priv->node = node; 489 490 /* Initialize interface structure */ 491 if_initname(ifp, NG_IFACE_IFACE_NAME, priv->unit); 492 ifp->if_output = ng_iface_output; 493 ifp->if_start = ng_iface_start; 494 ifp->if_ioctl = ng_iface_ioctl; 495 ifp->if_watchdog = NULL; 496 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 497 ifp->if_mtu = NG_IFACE_MTU_DEFAULT; 498 ifp->if_flags = (IFF_SIMPLEX|IFF_POINTOPOINT|IFF_NOARP|IFF_MULTICAST); 499 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 500 ifp->if_addrlen = 0; /* XXX */ 501 ifp->if_hdrlen = 0; /* XXX */ 502 ifp->if_baudrate = 64000; /* XXX */ 503 504 /* Give this node the same name as the interface (if possible) */ 505 if (ng_name_node(node, ifp->if_xname) != 0) 506 log(LOG_WARNING, "%s: can't acquire netgraph name\n", 507 ifp->if_xname); 508 509 /* Attach the interface */ 510 if_attach(ifp); 511 bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); 512 513 /* Done */ 514 return (0); 515 } 516 517 /* 518 * Give our ok for a hook to be added 519 */ 520 static int 521 ng_iface_newhook(node_p node, hook_p hook, const char *name) 522 { 523 const iffam_p iffam = get_iffam_from_name(name); 524 hook_p *hookptr; 525 526 if (iffam == NULL) 527 return (EPFNOSUPPORT); 528 hookptr = get_hook_from_iffam(NG_NODE_PRIVATE(node), iffam); 529 if (*hookptr != NULL) 530 return (EISCONN); 531 *hookptr = hook; 532 return (0); 533 } 534 535 /* 536 * Receive a control message 537 */ 538 static int 539 ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook) 540 { 541 const priv_p priv = NG_NODE_PRIVATE(node); 542 struct ifnet *const ifp = priv->ifp; 543 struct ng_mesg *resp = NULL; 544 int error = 0; 545 struct ng_mesg *msg; 546 547 NGI_GET_MSG(item, msg); 548 switch (msg->header.typecookie) { 549 case NGM_IFACE_COOKIE: 550 switch (msg->header.cmd) { 551 case NGM_IFACE_GET_IFNAME: 552 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT); 553 if (resp == NULL) { 554 error = ENOMEM; 555 break; 556 } 557 strlcpy(resp->data, ifp->if_xname, IFNAMSIZ); 558 break; 559 560 case NGM_IFACE_POINT2POINT: 561 case NGM_IFACE_BROADCAST: 562 { 563 564 /* Deny request if interface is UP */ 565 if ((ifp->if_flags & IFF_UP) != 0) 566 return (EBUSY); 567 568 /* Change flags */ 569 switch (msg->header.cmd) { 570 case NGM_IFACE_POINT2POINT: 571 ifp->if_flags |= IFF_POINTOPOINT; 572 ifp->if_flags &= ~IFF_BROADCAST; 573 break; 574 case NGM_IFACE_BROADCAST: 575 ifp->if_flags &= ~IFF_POINTOPOINT; 576 ifp->if_flags |= IFF_BROADCAST; 577 break; 578 } 579 break; 580 } 581 582 case NGM_IFACE_GET_IFINDEX: 583 NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT); 584 if (resp == NULL) { 585 error = ENOMEM; 586 break; 587 } 588 *((uint32_t *)resp->data) = priv->ifp->if_index; 589 break; 590 591 default: 592 error = EINVAL; 593 break; 594 } 595 break; 596 case NGM_CISCO_COOKIE: 597 switch (msg->header.cmd) { 598 case NGM_CISCO_GET_IPADDR: /* we understand this too */ 599 { 600 struct ifaddr *ifa; 601 602 /* Return the first configured IP address */ 603 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 604 struct ng_cisco_ipaddr *ips; 605 606 if (ifa->ifa_addr->sa_family != AF_INET) 607 continue; 608 NG_MKRESPONSE(resp, msg, sizeof(ips), M_NOWAIT); 609 if (resp == NULL) { 610 error = ENOMEM; 611 break; 612 } 613 ips = (struct ng_cisco_ipaddr *)resp->data; 614 ips->ipaddr = ((struct sockaddr_in *) 615 ifa->ifa_addr)->sin_addr; 616 ips->netmask = ((struct sockaddr_in *) 617 ifa->ifa_netmask)->sin_addr; 618 break; 619 } 620 621 /* No IP addresses on this interface? */ 622 if (ifa == NULL) 623 error = EADDRNOTAVAIL; 624 break; 625 } 626 default: 627 error = EINVAL; 628 break; 629 } 630 break; 631 case NGM_FLOW_COOKIE: 632 switch (msg->header.cmd) { 633 case NGM_LINK_IS_UP: 634 ifp->if_drv_flags |= IFF_DRV_RUNNING; 635 break; 636 case NGM_LINK_IS_DOWN: 637 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 638 break; 639 default: 640 break; 641 } 642 break; 643 default: 644 error = EINVAL; 645 break; 646 } 647 NG_RESPOND_MSG(error, node, item, resp); 648 NG_FREE_MSG(msg); 649 return (error); 650 } 651 652 /* 653 * Recive data from a hook. Pass the packet to the correct input routine. 654 */ 655 static int 656 ng_iface_rcvdata(hook_p hook, item_p item) 657 { 658 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 659 const iffam_p iffam = get_iffam_from_hook(priv, hook); 660 struct ifnet *const ifp = priv->ifp; 661 struct mbuf *m; 662 int isr; 663 664 NGI_GET_M(item, m); 665 NG_FREE_ITEM(item); 666 /* Sanity checks */ 667 KASSERT(iffam != NULL, ("%s: iffam", __func__)); 668 M_ASSERTPKTHDR(m); 669 if ((ifp->if_flags & IFF_UP) == 0) { 670 NG_FREE_M(m); 671 return (ENETDOWN); 672 } 673 674 /* Update interface stats */ 675 ifp->if_ipackets++; 676 ifp->if_ibytes += m->m_pkthdr.len; 677 678 /* Note receiving interface */ 679 m->m_pkthdr.rcvif = ifp; 680 681 /* Berkeley packet filter */ 682 ng_iface_bpftap(ifp, m, iffam->family); 683 684 /* Send packet */ 685 switch (iffam->family) { 686 #ifdef INET 687 case AF_INET: 688 isr = NETISR_IP; 689 break; 690 #endif 691 #ifdef INET6 692 case AF_INET6: 693 isr = NETISR_IPV6; 694 break; 695 #endif 696 #ifdef IPX 697 case AF_IPX: 698 isr = NETISR_IPX; 699 break; 700 #endif 701 #ifdef NETATALK 702 case AF_APPLETALK: 703 isr = NETISR_ATALK2; 704 break; 705 #endif 706 default: 707 m_freem(m); 708 return (EAFNOSUPPORT); 709 } 710 /* First chunk of an mbuf contains good junk */ 711 if (harvest.point_to_point) 712 random_harvest(m, 16, 3, 0, RANDOM_NET); 713 netisr_dispatch(isr, m); 714 return (0); 715 } 716 717 /* 718 * Shutdown and remove the node and its associated interface. 719 */ 720 static int 721 ng_iface_shutdown(node_p node) 722 { 723 const priv_p priv = NG_NODE_PRIVATE(node); 724 725 bpfdetach(priv->ifp); 726 if_detach(priv->ifp); 727 if_free(priv->ifp); 728 priv->ifp = NULL; 729 free_unr(ng_iface_unit, priv->unit); 730 FREE(priv, M_NETGRAPH_IFACE); 731 NG_NODE_SET_PRIVATE(node, NULL); 732 NG_NODE_UNREF(node); 733 return (0); 734 } 735 736 /* 737 * Hook disconnection. Note that we do *not* shutdown when all 738 * hooks have been disconnected. 739 */ 740 static int 741 ng_iface_disconnect(hook_p hook) 742 { 743 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 744 const iffam_p iffam = get_iffam_from_hook(priv, hook); 745 746 if (iffam == NULL) 747 panic(__func__); 748 *get_hook_from_iffam(priv, iffam) = NULL; 749 return (0); 750 } 751 752 /* 753 * Handle loading and unloading for this node type. 754 */ 755 static int 756 ng_iface_mod_event(module_t mod, int event, void *data) 757 { 758 int error = 0; 759 760 switch (event) { 761 case MOD_LOAD: 762 ng_iface_unit = new_unrhdr(0, 0xffff, NULL); 763 break; 764 case MOD_UNLOAD: 765 delete_unrhdr(ng_iface_unit); 766 break; 767 default: 768 error = EOPNOTSUPP; 769 break; 770 } 771 return (error); 772 }
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