ng_ether.c revision 141720
1 2/* 3 * ng_ether.c 4 */ 5 6/*- 7 * Copyright (c) 1996-2000 Whistle Communications, Inc. 8 * All rights reserved. 9 * 10 * Subject to the following obligations and disclaimer of warranty, use and 11 * redistribution of this software, in source or object code forms, with or 12 * without modifications are expressly permitted by Whistle Communications; 13 * provided, however, that: 14 * 1. Any and all reproductions of the source or object code must include the 15 * copyright notice above and the following disclaimer of warranties; and 16 * 2. No rights are granted, in any manner or form, to use Whistle 17 * Communications, Inc. trademarks, including the mark "WHISTLE 18 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 19 * such appears in the above copyright notice or in the software. 20 * 21 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 22 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 23 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 24 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 26 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 27 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 28 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 29 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 30 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 31 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 32 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 33 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 37 * OF SUCH DAMAGE. 38 * 39 * Authors: Archie Cobbs <archie@freebsd.org> 40 * Julian Elischer <julian@freebsd.org> 41 * 42 * $FreeBSD: head/sys/netgraph/ng_ether.c 141720 2005-02-12 11:14:25Z ru $ 43 */ 44 45/* 46 * ng_ether(4) netgraph node type 47 */ 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/kernel.h> 52#include <sys/malloc.h> 53#include <sys/mbuf.h> 54#include <sys/errno.h> 55#include <sys/syslog.h> 56#include <sys/socket.h> 57 58#include <net/bridge.h> 59#include <net/if.h> 60#include <net/if_types.h> 61#include <net/if_arp.h> 62#include <net/if_var.h> 63#include <net/ethernet.h> 64 65#include <netgraph/ng_message.h> 66#include <netgraph/netgraph.h> 67#include <netgraph/ng_parse.h> 68#include <netgraph/ng_ether.h> 69 70#define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph) 71#define IFP2NG_SET(ifp, val) (((struct arpcom *)(ifp))->ac_netgraph = (val)) 72 73/* Per-node private data */ 74struct private { 75 struct ifnet *ifp; /* associated interface */ 76 hook_p upper; /* upper hook connection */ 77 hook_p lower; /* lower hook connection */ 78 hook_p orphan; /* orphan hook connection */ 79 u_char autoSrcAddr; /* always overwrite source address */ 80 u_char promisc; /* promiscuous mode enabled */ 81 u_long hwassist; /* hardware checksum capabilities */ 82 u_int flags; /* flags e.g. really die */ 83}; 84typedef struct private *priv_p; 85 86/* Hook pointers used by if_ethersubr.c to callback to netgraph */ 87extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 88extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 89extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 90extern void (*ng_ether_attach_p)(struct ifnet *ifp); 91extern void (*ng_ether_detach_p)(struct ifnet *ifp); 92extern void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 93 94/* Functional hooks called from if_ethersubr.c */ 95static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp); 96static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m); 97static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp); 98static void ng_ether_attach(struct ifnet *ifp); 99static void ng_ether_detach(struct ifnet *ifp); 100static void ng_ether_link_state(struct ifnet *ifp, int state); 101 102/* Other functions */ 103static int ng_ether_rcv_lower(node_p node, struct mbuf *m); 104static int ng_ether_rcv_upper(node_p node, struct mbuf *m); 105 106/* Netgraph node methods */ 107static ng_constructor_t ng_ether_constructor; 108static ng_rcvmsg_t ng_ether_rcvmsg; 109static ng_shutdown_t ng_ether_shutdown; 110static ng_newhook_t ng_ether_newhook; 111static ng_connect_t ng_ether_connect; 112static ng_rcvdata_t ng_ether_rcvdata; 113static ng_disconnect_t ng_ether_disconnect; 114static int ng_ether_mod_event(module_t mod, int event, void *data); 115 116/* List of commands and how to convert arguments to/from ASCII */ 117static const struct ng_cmdlist ng_ether_cmdlist[] = { 118 { 119 NGM_ETHER_COOKIE, 120 NGM_ETHER_GET_IFNAME, 121 "getifname", 122 NULL, 123 &ng_parse_string_type 124 }, 125 { 126 NGM_ETHER_COOKIE, 127 NGM_ETHER_GET_IFINDEX, 128 "getifindex", 129 NULL, 130 &ng_parse_int32_type 131 }, 132 { 133 NGM_ETHER_COOKIE, 134 NGM_ETHER_GET_ENADDR, 135 "getenaddr", 136 NULL, 137 &ng_parse_enaddr_type 138 }, 139 { 140 NGM_ETHER_COOKIE, 141 NGM_ETHER_SET_ENADDR, 142 "setenaddr", 143 &ng_parse_enaddr_type, 144 NULL 145 }, 146 { 147 NGM_ETHER_COOKIE, 148 NGM_ETHER_GET_PROMISC, 149 "getpromisc", 150 NULL, 151 &ng_parse_int32_type 152 }, 153 { 154 NGM_ETHER_COOKIE, 155 NGM_ETHER_SET_PROMISC, 156 "setpromisc", 157 &ng_parse_int32_type, 158 NULL 159 }, 160 { 161 NGM_ETHER_COOKIE, 162 NGM_ETHER_GET_AUTOSRC, 163 "getautosrc", 164 NULL, 165 &ng_parse_int32_type 166 }, 167 { 168 NGM_ETHER_COOKIE, 169 NGM_ETHER_SET_AUTOSRC, 170 "setautosrc", 171 &ng_parse_int32_type, 172 NULL 173 }, 174 { 0 } 175}; 176 177static struct ng_type ng_ether_typestruct = { 178 .version = NG_ABI_VERSION, 179 .name = NG_ETHER_NODE_TYPE, 180 .mod_event = ng_ether_mod_event, 181 .constructor = ng_ether_constructor, 182 .rcvmsg = ng_ether_rcvmsg, 183 .shutdown = ng_ether_shutdown, 184 .newhook = ng_ether_newhook, 185 .connect = ng_ether_connect, 186 .rcvdata = ng_ether_rcvdata, 187 .disconnect = ng_ether_disconnect, 188 .cmdlist = ng_ether_cmdlist, 189}; 190NETGRAPH_INIT(ether, &ng_ether_typestruct); 191 192/****************************************************************** 193 ETHERNET FUNCTION HOOKS 194******************************************************************/ 195 196/* 197 * Handle a packet that has come in on an interface. We get to 198 * look at it here before any upper layer protocols do. 199 * 200 * NOTE: this function will get called at splimp() 201 */ 202static void 203ng_ether_input(struct ifnet *ifp, struct mbuf **mp) 204{ 205 const node_p node = IFP2NG(ifp); 206 const priv_p priv = NG_NODE_PRIVATE(node); 207 int error; 208 209 /* If "lower" hook not connected, let packet continue */ 210 if (priv->lower == NULL) 211 return; 212 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */ 213} 214 215/* 216 * Handle a packet that has come in on an interface, and which 217 * does not match any of our known protocols (an ``orphan''). 218 * 219 * NOTE: this function will get called at splimp() 220 */ 221static void 222ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m) 223{ 224 const node_p node = IFP2NG(ifp); 225 const priv_p priv = NG_NODE_PRIVATE(node); 226 int error; 227 228 /* If "orphan" hook not connected, discard packet */ 229 if (priv->orphan == NULL) { 230 m_freem(m); 231 return; 232 } 233 NG_SEND_DATA_ONLY(error, priv->orphan, m); 234} 235 236/* 237 * Handle a packet that is going out on an interface. 238 * The Ethernet header is already attached to the mbuf. 239 */ 240static int 241ng_ether_output(struct ifnet *ifp, struct mbuf **mp) 242{ 243 const node_p node = IFP2NG(ifp); 244 const priv_p priv = NG_NODE_PRIVATE(node); 245 int error = 0; 246 247 /* If "upper" hook not connected, let packet continue */ 248 if (priv->upper == NULL) 249 return (0); 250 251 /* Send it out "upper" hook */ 252 NG_SEND_DATA_ONLY(error, priv->upper, *mp); 253 return (error); 254} 255 256/* 257 * A new Ethernet interface has been attached. 258 * Create a new node for it, etc. 259 */ 260static void 261ng_ether_attach(struct ifnet *ifp) 262{ 263 priv_p priv; 264 node_p node; 265 266 /* Create node */ 267 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__)); 268 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) { 269 log(LOG_ERR, "%s: can't %s for %s\n", 270 __func__, "create node", ifp->if_xname); 271 return; 272 } 273 274 /* Allocate private data */ 275 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO); 276 if (priv == NULL) { 277 log(LOG_ERR, "%s: can't %s for %s\n", 278 __func__, "allocate memory", ifp->if_xname); 279 NG_NODE_UNREF(node); 280 return; 281 } 282 NG_NODE_SET_PRIVATE(node, priv); 283 priv->ifp = ifp; 284 IFP2NG_SET(ifp, node); 285 priv->autoSrcAddr = 1; 286 priv->hwassist = ifp->if_hwassist; 287 288 /* Try to give the node the same name as the interface */ 289 if (ng_name_node(node, ifp->if_xname) != 0) { 290 log(LOG_WARNING, "%s: can't name node %s\n", 291 __func__, ifp->if_xname); 292 } 293} 294 295/* 296 * An Ethernet interface is being detached. 297 * REALLY Destroy its node. 298 */ 299static void 300ng_ether_detach(struct ifnet *ifp) 301{ 302 const node_p node = IFP2NG(ifp); 303 const priv_p priv = NG_NODE_PRIVATE(node); 304 305 NG_NODE_REALLY_DIE(node); /* Force real removal of node */ 306 /* 307 * We can't assume the ifnet is still around when we run shutdown 308 * So zap it now. XXX We HOPE that anything running at this time 309 * handles it (as it should in the non netgraph case). 310 */ 311 IFP2NG_SET(ifp, NULL); 312 priv->ifp = NULL; /* XXX race if interrupted an output packet */ 313 ng_rmnode_self(node); /* remove all netgraph parts */ 314} 315 316/* 317 * Notify graph about link event. 318 * if_link_state_change() has already checked that the state has changed. 319 */ 320static void 321ng_ether_link_state(struct ifnet *ifp, int state) 322{ 323 const node_p node = IFP2NG(ifp); 324 const priv_p priv = NG_NODE_PRIVATE(node); 325 struct ng_mesg *msg; 326 int cmd, dummy_error = 0; 327 328 if (priv->lower == NULL) 329 return; 330 331 if (state == LINK_STATE_UP) 332 cmd = NGM_LINK_IS_UP; 333 else if (state == LINK_STATE_DOWN) 334 cmd = NGM_LINK_IS_DOWN; 335 else 336 return; 337 338 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT); 339 if (msg != NULL) 340 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->lower, 0); 341} 342 343/****************************************************************** 344 NETGRAPH NODE METHODS 345******************************************************************/ 346 347/* 348 * It is not possible or allowable to create a node of this type. 349 * Nodes get created when the interface is attached (or, when 350 * this node type's KLD is loaded). 351 */ 352static int 353ng_ether_constructor(node_p node) 354{ 355 return (EINVAL); 356} 357 358/* 359 * Check for attaching a new hook. 360 */ 361static int 362ng_ether_newhook(node_p node, hook_p hook, const char *name) 363{ 364 const priv_p priv = NG_NODE_PRIVATE(node); 365 hook_p *hookptr; 366 367 /* Divert hook is an alias for lower */ 368 if (strcmp(name, NG_ETHER_HOOK_DIVERT) == 0) 369 name = NG_ETHER_HOOK_LOWER; 370 371 /* Which hook? */ 372 if (strcmp(name, NG_ETHER_HOOK_UPPER) == 0) 373 hookptr = &priv->upper; 374 else if (strcmp(name, NG_ETHER_HOOK_LOWER) == 0) 375 hookptr = &priv->lower; 376 else if (strcmp(name, NG_ETHER_HOOK_ORPHAN) == 0) 377 hookptr = &priv->orphan; 378 else 379 return (EINVAL); 380 381 /* Check if already connected (shouldn't be, but doesn't hurt) */ 382 if (*hookptr != NULL) 383 return (EISCONN); 384 385 /* Disable hardware checksums while 'upper' hook is connected */ 386 if (hookptr == &priv->upper) 387 priv->ifp->if_hwassist = 0; 388 389 /* OK */ 390 *hookptr = hook; 391 return (0); 392} 393 394/* 395 * Hooks are attached, adjust to force queueing. 396 * We don't really care which hook it is. 397 * they should all be queuing for outgoing data. 398 */ 399static int 400ng_ether_connect(hook_p hook) 401{ 402 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); 403 return (0); 404} 405 406/* 407 * Receive an incoming control message. 408 */ 409static int 410ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook) 411{ 412 const priv_p priv = NG_NODE_PRIVATE(node); 413 struct ng_mesg *resp = NULL; 414 int error = 0; 415 struct ng_mesg *msg; 416 417 NGI_GET_MSG(item, msg); 418 switch (msg->header.typecookie) { 419 case NGM_ETHER_COOKIE: 420 switch (msg->header.cmd) { 421 case NGM_ETHER_GET_IFNAME: 422 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT); 423 if (resp == NULL) { 424 error = ENOMEM; 425 break; 426 } 427 strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ); 428 break; 429 case NGM_ETHER_GET_IFINDEX: 430 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT); 431 if (resp == NULL) { 432 error = ENOMEM; 433 break; 434 } 435 *((u_int32_t *)resp->data) = priv->ifp->if_index; 436 break; 437 case NGM_ETHER_GET_ENADDR: 438 NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT); 439 if (resp == NULL) { 440 error = ENOMEM; 441 break; 442 } 443 bcopy((IFP2AC(priv->ifp))->ac_enaddr, 444 resp->data, ETHER_ADDR_LEN); 445 break; 446 case NGM_ETHER_SET_ENADDR: 447 { 448 if (msg->header.arglen != ETHER_ADDR_LEN) { 449 error = EINVAL; 450 break; 451 } 452 error = if_setlladdr(priv->ifp, 453 (u_char *)msg->data, ETHER_ADDR_LEN); 454 break; 455 } 456 case NGM_ETHER_GET_PROMISC: 457 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT); 458 if (resp == NULL) { 459 error = ENOMEM; 460 break; 461 } 462 *((u_int32_t *)resp->data) = priv->promisc; 463 break; 464 case NGM_ETHER_SET_PROMISC: 465 { 466 u_char want; 467 468 if (msg->header.arglen != sizeof(u_int32_t)) { 469 error = EINVAL; 470 break; 471 } 472 want = !!*((u_int32_t *)msg->data); 473 if (want ^ priv->promisc) { 474 if ((error = ifpromisc(priv->ifp, want)) != 0) 475 break; 476 priv->promisc = want; 477 } 478 break; 479 } 480 case NGM_ETHER_GET_AUTOSRC: 481 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT); 482 if (resp == NULL) { 483 error = ENOMEM; 484 break; 485 } 486 *((u_int32_t *)resp->data) = priv->autoSrcAddr; 487 break; 488 case NGM_ETHER_SET_AUTOSRC: 489 if (msg->header.arglen != sizeof(u_int32_t)) { 490 error = EINVAL; 491 break; 492 } 493 priv->autoSrcAddr = !!*((u_int32_t *)msg->data); 494 break; 495 default: 496 error = EINVAL; 497 break; 498 } 499 break; 500 default: 501 error = EINVAL; 502 break; 503 } 504 NG_RESPOND_MSG(error, node, item, resp); 505 NG_FREE_MSG(msg); 506 return (error); 507} 508 509/* 510 * Receive data on a hook. 511 */ 512static int 513ng_ether_rcvdata(hook_p hook, item_p item) 514{ 515 const node_p node = NG_HOOK_NODE(hook); 516 const priv_p priv = NG_NODE_PRIVATE(node); 517 struct mbuf *m; 518 519 NGI_GET_M(item, m); 520 NG_FREE_ITEM(item); 521 522 if (hook == priv->lower || hook == priv->orphan) 523 return ng_ether_rcv_lower(node, m); 524 if (hook == priv->upper) 525 return ng_ether_rcv_upper(node, m); 526 panic("%s: weird hook", __func__); 527#ifdef RESTARTABLE_PANICS /* so we don't get an error msg in LINT */ 528 return (0); 529#endif 530} 531 532/* 533 * Handle an mbuf received on the "lower" or "orphan" hook. 534 */ 535static int 536ng_ether_rcv_lower(node_p node, struct mbuf *m) 537{ 538 const priv_p priv = NG_NODE_PRIVATE(node); 539 struct ifnet *const ifp = priv->ifp; 540 541 /* Check whether interface is ready for packets */ 542 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 543 NG_FREE_M(m); 544 return (ENETDOWN); 545 } 546 547 /* Make sure header is fully pulled up */ 548 if (m->m_pkthdr.len < sizeof(struct ether_header)) { 549 NG_FREE_M(m); 550 return (EINVAL); 551 } 552 if (m->m_len < sizeof(struct ether_header) 553 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL) 554 return (ENOBUFS); 555 556 /* Drop in the MAC address if desired */ 557 if (priv->autoSrcAddr) { 558 559 /* Make the mbuf writable if it's not already */ 560 if (!M_WRITABLE(m) 561 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL) 562 return (ENOBUFS); 563 564 /* Overwrite source MAC address */ 565 bcopy((IFP2AC(ifp))->ac_enaddr, 566 mtod(m, struct ether_header *)->ether_shost, 567 ETHER_ADDR_LEN); 568 } 569 570 /* Send it on its way */ 571 return ether_output_frame(ifp, m); 572} 573 574/* 575 * Handle an mbuf received on the "upper" hook. 576 */ 577static int 578ng_ether_rcv_upper(node_p node, struct mbuf *m) 579{ 580 const priv_p priv = NG_NODE_PRIVATE(node); 581 582 m->m_pkthdr.rcvif = priv->ifp; 583 584 if (BDG_ACTIVE(priv->ifp) ) 585 if ((m = bridge_in_ptr(priv->ifp, m)) == NULL) 586 return (0); 587 588 /* Route packet back in */ 589 ether_demux(priv->ifp, m); 590 return (0); 591} 592 593/* 594 * Shutdown node. This resets the node but does not remove it 595 * unless the REALLY_DIE flag is set. 596 */ 597static int 598ng_ether_shutdown(node_p node) 599{ 600 const priv_p priv = NG_NODE_PRIVATE(node); 601 602 if (node->nd_flags & NGF_REALLY_DIE) { 603 /* 604 * WE came here because the ethernet card is being unloaded, 605 * so stop being persistant. 606 * Actually undo all the things we did on creation. 607 * Assume the ifp has already been freed. 608 */ 609 NG_NODE_SET_PRIVATE(node, NULL); 610 FREE(priv, M_NETGRAPH); 611 NG_NODE_UNREF(node); /* free node itself */ 612 return (0); 613 } 614 if (priv->promisc) { /* disable promiscuous mode */ 615 (void)ifpromisc(priv->ifp, 0); 616 priv->promisc = 0; 617 } 618 priv->autoSrcAddr = 1; /* reset auto-src-addr flag */ 619 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */ 620 621 return (0); 622} 623 624/* 625 * Hook disconnection. 626 */ 627static int 628ng_ether_disconnect(hook_p hook) 629{ 630 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 631 632 if (hook == priv->upper) { 633 priv->upper = NULL; 634 if (priv->ifp != NULL) /* restore h/w csum */ 635 priv->ifp->if_hwassist = priv->hwassist; 636 } else if (hook == priv->lower) 637 priv->lower = NULL; 638 else if (hook == priv->orphan) 639 priv->orphan = NULL; 640 else 641 panic("%s: weird hook", __func__); 642 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 643 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) 644 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */ 645 return (0); 646} 647 648/****************************************************************** 649 INITIALIZATION 650******************************************************************/ 651 652/* 653 * Handle loading and unloading for this node type. 654 */ 655static int 656ng_ether_mod_event(module_t mod, int event, void *data) 657{ 658 struct ifnet *ifp; 659 int error = 0; 660 int s; 661 662 s = splnet(); 663 switch (event) { 664 case MOD_LOAD: 665 666 /* Register function hooks */ 667 if (ng_ether_attach_p != NULL) { 668 error = EEXIST; 669 break; 670 } 671 ng_ether_attach_p = ng_ether_attach; 672 ng_ether_detach_p = ng_ether_detach; 673 ng_ether_output_p = ng_ether_output; 674 ng_ether_input_p = ng_ether_input; 675 ng_ether_input_orphan_p = ng_ether_input_orphan; 676 ng_ether_link_state_p = ng_ether_link_state; 677 678 /* Create nodes for any already-existing Ethernet interfaces */ 679 IFNET_RLOCK(); 680 TAILQ_FOREACH(ifp, &ifnet, if_link) { 681 if (ifp->if_type == IFT_ETHER 682 || ifp->if_type == IFT_L2VLAN) 683 ng_ether_attach(ifp); 684 } 685 IFNET_RUNLOCK(); 686 break; 687 688 case MOD_UNLOAD: 689 690 /* 691 * Note that the base code won't try to unload us until 692 * all nodes have been removed, and that can't happen 693 * until all Ethernet interfaces are removed. In any 694 * case, we know there are no nodes left if the action 695 * is MOD_UNLOAD, so there's no need to detach any nodes. 696 */ 697 698 /* Unregister function hooks */ 699 ng_ether_attach_p = NULL; 700 ng_ether_detach_p = NULL; 701 ng_ether_output_p = NULL; 702 ng_ether_input_p = NULL; 703 ng_ether_input_orphan_p = NULL; 704 ng_ether_link_state_p = NULL; 705 break; 706 707 default: 708 error = EOPNOTSUPP; 709 break; 710 } 711 splx(s); 712 return (error); 713} 714 715