1 /*- 2 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <sys/un.h> 32 #include <netinet/in.h> 33 #include <arpa/inet.h> 34 #include <netdb.h> 35 #include <netgraph.h> 36 #include <net/ethernet.h> 37 #include <net/if.h> 38 #include <net/route.h> 39 #include <netinet/in_systm.h> 40 #include <netinet/ip.h> 41 #include <netgraph/ng_ether.h> 42 #include <netgraph/ng_message.h> 43 #include <netgraph/ng_pppoe.h> 44 #include <netgraph/ng_socket.h> 45 46 #include <errno.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <sysexits.h> 51 #include <sys/fcntl.h> 52 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 53 #include <sys/linker.h> 54 #include <sys/module.h> 55 #endif 56 #include <sys/stat.h> 57 #include <sys/uio.h> 58 #include <termios.h> 59 #include <sys/time.h> 60 #include <unistd.h> 61 62 #include "layer.h" 63 #include "defs.h" 64 #include "mbuf.h" 65 #include "log.h" 66 #include "timer.h" 67 #include "lqr.h" 68 #include "hdlc.h" 69 #include "throughput.h" 70 #include "fsm.h" 71 #include "lcp.h" 72 #include "ccp.h" 73 #include "link.h" 74 #include "async.h" 75 #include "descriptor.h" 76 #include "physical.h" 77 #include "main.h" 78 #include "mp.h" 79 #include "chat.h" 80 #include "auth.h" 81 #include "chap.h" 82 #include "cbcp.h" 83 #include "datalink.h" 84 #include "slcompress.h" 85 #include "iplist.h" 86 #include "ipcp.h" 87 #include "filter.h" 88 #ifndef NORADIUS 89 #include "radius.h" 90 #endif 91 #include "bundle.h" 92 #include "id.h" 93 #include "iface.h" 94 #include "ether.h" 95 96 97 #define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */ 98 99 struct etherdevice { 100 struct device dev; /* What struct physical knows about */ 101 int cs; /* Control socket */ 102 int connected; /* Are we connected yet ? */ 103 int timeout; /* Seconds attempting to connect */ 104 char hook[sizeof TUN_NAME + 11]; /* Our socket node hook */ 105 }; 106 107 #define device2ether(d) \ 108 ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL) 109 110 int 111 ether_DeviceSize(void) 112 { 113 return sizeof(struct etherdevice); 114 } 115 116 static ssize_t 117 ether_Write(struct physical *p, const void *v, size_t n) 118 { 119 struct etherdevice *dev = device2ether(p->handler); 120 121 return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n; 122 } 123 124 static ssize_t 125 ether_Read(struct physical *p, void *v, size_t n) 126 { 127 char hook[sizeof TUN_NAME + 11]; 128 129 return NgRecvData(p->fd, v, n, hook); 130 } 131 132 static int 133 ether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e) 134 { 135 struct etherdevice *dev = device2ether(p->handler); 136 int result; 137 138 if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) { 139 FD_CLR(dev->cs, r); 140 log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs); 141 result = 1; 142 } else 143 result = 0; 144 145 /* Careful... physical_RemoveFromSet() called us ! */ 146 147 p->handler->removefromset = NULL; 148 result += physical_RemoveFromSet(p, r, w, e); 149 p->handler->removefromset = ether_RemoveFromSet; 150 151 return result; 152 } 153 154 static void 155 ether_Free(struct physical *p) 156 { 157 struct etherdevice *dev = device2ether(p->handler); 158 159 physical_SetDescriptor(p); 160 if (dev->cs != -1) 161 close(dev->cs); 162 free(dev); 163 } 164 165 static const char * 166 ether_OpenInfo(struct physical *p) 167 { 168 struct etherdevice *dev = device2ether(p->handler); 169 170 switch (dev->connected) { 171 case CARRIER_PENDING: 172 return "negotiating"; 173 case CARRIER_OK: 174 return "established"; 175 } 176 177 return "disconnected"; 178 } 179 180 static void 181 ether_device2iov(struct device *d, struct iovec *iov, int *niov, 182 int maxiov, int *auxfd, int *nauxfd) 183 { 184 struct etherdevice *dev = device2ether(d); 185 int sz = physical_MaxDeviceSize(); 186 187 iov[*niov].iov_base = realloc(d, sz); 188 if (iov[*niov].iov_base == NULL) { 189 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz); 190 AbortProgram(EX_OSERR); 191 } 192 iov[*niov].iov_len = sz; 193 (*niov)++; 194 195 if (dev->cs >= 0) { 196 *auxfd = dev->cs; 197 (*nauxfd)++; 198 } 199 } 200 201 static void 202 ether_MessageIn(struct etherdevice *dev) 203 { 204 char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)]; 205 struct ng_mesg *rep = (struct ng_mesg *)msgbuf; 206 struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep); 207 char unknown[14]; 208 const char *msg; 209 struct timeval t; 210 fd_set *r; 211 int ret; 212 213 if (dev->cs < 0) 214 return; 215 216 if ((r = mkfdset()) == NULL) { 217 log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n"); 218 return; 219 } 220 zerofdset(r); 221 FD_SET(dev->cs, r); 222 t.tv_sec = t.tv_usec = 0; 223 ret = select(dev->cs + 1, r, NULL, NULL, &t); 224 free(r); 225 226 if (ret <= 0) 227 return; 228 229 if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) < 0) 230 return; 231 232 if (rep->header.version != NG_VERSION) { 233 log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n", 234 (long)rep->header.version, (long)NG_VERSION); 235 return; 236 } 237 238 if (rep->header.typecookie != NGM_PPPOE_COOKIE) { 239 log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n", 240 (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE); 241 return; 242 } 243 244 switch (rep->header.cmd) { 245 case NGM_PPPOE_SET_FLAG: msg = "SET_FLAG"; break; 246 case NGM_PPPOE_CONNECT: msg = "CONNECT"; break; 247 case NGM_PPPOE_LISTEN: msg = "LISTEN"; break; 248 case NGM_PPPOE_OFFER: msg = "OFFER"; break; 249 case NGM_PPPOE_SUCCESS: msg = "SUCCESS"; break; 250 case NGM_PPPOE_FAIL: msg = "FAIL"; break; 251 case NGM_PPPOE_CLOSE: msg = "CLOSE"; break; 252 case NGM_PPPOE_GET_STATUS: msg = "GET_STATUS"; break; 253 default: 254 snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd); 255 msg = unknown; 256 break; 257 } 258 259 log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%s\")\n", msg, sts->hook); 260 261 switch (rep->header.cmd) { 262 case NGM_PPPOE_SUCCESS: 263 dev->connected = CARRIER_OK; 264 break; 265 case NGM_PPPOE_FAIL: 266 case NGM_PPPOE_CLOSE: 267 dev->connected = CARRIER_LOST; 268 break; 269 } 270 } 271 272 static int 273 ether_AwaitCarrier(struct physical *p) 274 { 275 struct etherdevice *dev = device2ether(p->handler); 276 277 if (dev->connected != CARRIER_OK && !dev->timeout--) 278 dev->connected = CARRIER_LOST; 279 else if (dev->connected == CARRIER_PENDING) 280 ether_MessageIn(dev); 281 282 return dev->connected; 283 } 284 285 static const struct device baseetherdevice = { 286 ETHER_DEVICE, 287 "ether", 288 { CD_REQUIRED, DEF_ETHERCDDELAY }, 289 ether_AwaitCarrier, 290 ether_RemoveFromSet, 291 NULL, 292 NULL, 293 NULL, 294 NULL, 295 ether_Free, 296 ether_Read, 297 ether_Write, 298 ether_device2iov, 299 NULL, 300 ether_OpenInfo 301 }; 302 303 struct device * 304 ether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, 305 int maxiov, int *auxfd, int *nauxfd) 306 { 307 if (type == ETHER_DEVICE) { 308 struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base; 309 310 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */ 311 if (dev == NULL) { 312 log_Printf(LogALERT, "Failed to allocate memory: %d\n", 313 (int)(sizeof *dev)); 314 AbortProgram(EX_OSERR); 315 } 316 317 if (*nauxfd) { 318 dev->cs = *auxfd; 319 (*nauxfd)--; 320 } else 321 dev->cs = -1; 322 323 /* Refresh function pointers etc */ 324 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 325 326 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 327 return &dev->dev; 328 } 329 330 return NULL; 331 } 332 333 static int 334 ether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 335 { 336 struct physical *p = descriptor2physical(d); 337 struct etherdevice *dev = device2ether(p->handler); 338 int result; 339 340 if (r && dev->cs >= 0) { 341 FD_SET(dev->cs, r); 342 log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs); 343 result = 1; 344 } else 345 result = 0; 346 347 result += physical_doUpdateSet(d, r, w, e, n, 0); 348 349 return result; 350 } 351 352 static int 353 ether_IsSet(struct fdescriptor *d, const fd_set *fdset) 354 { 355 struct physical *p = descriptor2physical(d); 356 struct etherdevice *dev = device2ether(p->handler); 357 int result; 358 359 result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset); 360 result += physical_IsSet(d, fdset); 361 362 return result; 363 } 364 365 static void 366 ether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 367 const fd_set *fdset) 368 { 369 struct physical *p = descriptor2physical(d); 370 struct etherdevice *dev = device2ether(p->handler); 371 372 if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) { 373 ether_MessageIn(dev); 374 if (dev->connected == CARRIER_LOST) { 375 log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name); 376 datalink_Down(p->dl, CLOSE_NORMAL); 377 return; 378 } 379 } 380 381 if (physical_IsSet(d, fdset)) 382 physical_DescriptorRead(d, bundle, fdset); 383 } 384 385 static struct device * 386 ether_Abandon(struct etherdevice *dev, struct physical *p) 387 { 388 /* Abandon our node construction */ 389 close(dev->cs); 390 close(p->fd); 391 p->fd = -2; /* Nobody else need try.. */ 392 free(dev); 393 394 return NULL; 395 } 396 397 struct device * 398 ether_Create(struct physical *p) 399 { 400 u_char rbuf[2048]; 401 struct etherdevice *dev; 402 struct ng_mesg *resp; 403 const struct hooklist *hlist; 404 const struct nodeinfo *ninfo; 405 char *path; 406 int ifacelen, f; 407 408 dev = NULL; 409 path = NULL; 410 ifacelen = 0; 411 if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE, 412 PPPOE_NODE_TYPE_LEN) && 413 p->name.full[PPPOE_NODE_TYPE_LEN] == ':') { 414 const struct linkinfo *nlink; 415 struct ngpppoe_init_data *data; 416 struct ngm_mkpeer mkp; 417 struct ngm_connect ngc; 418 const char *iface, *provider; 419 char etherid[12]; 420 int providerlen; 421 char connectpath[sizeof dev->hook + 2]; /* .:<hook> */ 422 423 p->fd--; /* We own the device - change fd */ 424 425 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 426 if (modfind("netgraph") == -1 && ID0kldload("netgraph") == -1) { 427 log_Printf(LogWARN, "kldload: netgraph: %s\n", strerror(errno)); 428 return NULL; 429 } 430 431 if (modfind("ng_ether") == -1 && ID0kldload("ng_ether") == -1) 432 /* 433 * Don't treat this as an error as older kernels have this stuff 434 * built in as part of the netgraph node itself. 435 */ 436 log_Printf(LogWARN, "kldload: ng_ether: %s\n", strerror(errno)); 437 438 if (modfind("ng_pppoe") == -1 && ID0kldload("ng_pppoe") == -1) { 439 log_Printf(LogWARN, "kldload: ng_pppoe: %s\n", strerror(errno)); 440 return NULL; 441 } 442 443 if (modfind("ng_socket") == -1 && ID0kldload("ng_socket") == -1) { 444 log_Printf(LogWARN, "kldload: ng_socket: %s\n", strerror(errno)); 445 return NULL; 446 } 447 #endif 448 449 if ((dev = malloc(sizeof *dev)) == NULL) 450 return NULL; 451 452 iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1; 453 454 provider = strchr(iface, ':'); 455 if (provider) { 456 ifacelen = provider - iface; 457 provider++; 458 providerlen = strlen(provider); 459 } else { 460 ifacelen = strlen(iface); 461 provider = ""; 462 providerlen = 0; 463 } 464 465 /* 466 * We're going to do this (where tunN is our tunnel device): 467 * 468 * .---------. 469 * | ether | 470 * | <iface> | dev->cs 471 * `---------' | 472 * (orphan) p->fd | 473 * | | | 474 * | | | 475 * (ethernet) | | 476 * .---------. .-----------. 477 * | pppoe | | socket | 478 * | <iface> |(tunN)<---->(tunN)| <unnamed> | 479 * `--------- `-----------' 480 * (tunX) 481 * ^ 482 * | 483 * `--->(tunX) 484 */ 485 486 /* Create a socket node */ 487 if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) { 488 log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n", 489 strerror(errno)); 490 free(dev); 491 return NULL; 492 } 493 494 /* 495 * Ask for a list of hooks attached to the "ether" node. This node should 496 * magically exist as a way of hooking stuff onto an ethernet device 497 */ 498 path = (char *)alloca(ifacelen + 2); 499 sprintf(path, "%.*s:", ifacelen, iface); 500 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS, 501 NULL, 0) < 0) { 502 log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n", 503 path, strerror(errno)); 504 return ether_Abandon(dev, p); 505 } 506 507 /* Get our list back */ 508 resp = (struct ng_mesg *)rbuf; 509 if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) < 0) { 510 log_Printf(LogWARN, "Cannot get netgraph response: %s\n", 511 strerror(errno)); 512 return ether_Abandon(dev, p); 513 } 514 515 hlist = (const struct hooklist *)resp->data; 516 ninfo = &hlist->nodeinfo; 517 518 /* Make sure we've got the right type of node */ 519 if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE, 520 sizeof NG_ETHER_NODE_TYPE - 1)) { 521 log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``" 522 NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type); 523 return ether_Abandon(dev, p); 524 } 525 526 log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n", 527 path, ninfo->id); 528 529 /* look for a hook already attached. */ 530 for (f = 0; f < ninfo->hooks; f++) { 531 nlink = &hlist->link[f]; 532 533 log_Printf(LogDEBUG, " Found %s -> %s\n", nlink->ourhook, 534 nlink->peerhook); 535 536 if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) || 537 !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) { 538 /* 539 * Something is using the data coming out of this ``ether'' node. 540 * If it's a PPPoE node, we use that node, otherwise we complain that 541 * someone else is using the node. 542 */ 543 if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE)) 544 /* Use this PPPoE node ! */ 545 snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id); 546 else { 547 log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n", 548 path, nlink->nodeinfo.type); 549 return ether_Abandon(dev, p); 550 } 551 break; 552 } 553 } 554 555 if (f == ninfo->hooks) { 556 /* 557 * Create a new ``PPPoE'' node connected to the ``ether'' node using 558 * the magic ``orphan'' and ``ethernet'' hooks 559 */ 560 snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE); 561 snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN); 562 snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET); 563 snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id); 564 565 log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n", 566 etherid, mkp.ourhook, mkp.peerhook); 567 568 if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE, 569 NGM_MKPEER, &mkp, sizeof mkp) < 0) { 570 log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n", 571 etherid, strerror(errno)); 572 return ether_Abandon(dev, p); 573 } 574 575 snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN); 576 } 577 578 snprintf(dev->hook, sizeof dev->hook, "%s%d", 579 TUN_NAME, p->dl->bundle->unit); 580 581 /* 582 * Connect the PPPoE node to our socket node. 583 * ngc.path has already been set up 584 */ 585 snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook); 586 memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook); 587 588 log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n", 589 ngc.ourhook, ngc.path, ngc.peerhook); 590 if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE, 591 NGM_CONNECT, &ngc, sizeof ngc) < 0) { 592 log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph " 593 "nodes: %s\n", strerror(errno)); 594 return ether_Abandon(dev, p); 595 } 596 597 /* And finally, request a connection to the given provider */ 598 599 data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen); 600 snprintf(data->hook, sizeof data->hook, "%s", dev->hook); 601 memcpy(data->data, provider, providerlen); 602 data->data_len = providerlen; 603 604 snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook); 605 log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath); 606 if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE, 607 NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) { 608 log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n", 609 connectpath, strerror(errno)); 610 return ether_Abandon(dev, p); 611 } 612 613 /* Hook things up so that we monitor dev->cs */ 614 p->desc.UpdateSet = ether_UpdateSet; 615 p->desc.IsSet = ether_IsSet; 616 p->desc.Read = ether_DescriptorRead; 617 618 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 619 switch (p->cfg.cd.necessity) { 620 case CD_VARIABLE: 621 dev->dev.cd.delay = p->cfg.cd.delay; 622 break; 623 case CD_REQUIRED: 624 dev->dev.cd = p->cfg.cd; 625 break; 626 case CD_NOTREQUIRED: 627 log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n", 628 p->link.name, dev->dev.cd.delay); 629 case CD_DEFAULT: 630 break; 631 } 632 633 dev->timeout = dev->dev.cd.delay; 634 dev->connected = CARRIER_PENDING; 635 636 } else { 637 /* See if we're a netgraph socket */ 638 struct stat st; 639 640 if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 641 struct sockaddr_storage ssock; 642 struct sockaddr *sock = (struct sockaddr *)&ssock; 643 int sz; 644 645 sz = sizeof ssock; 646 if (getsockname(p->fd, sock, &sz) == -1) { 647 log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 648 close(p->fd); 649 p->fd = -1; 650 return NULL; 651 } 652 653 if (sock->sa_family == AF_NETGRAPH) { 654 /* 655 * It's a netgraph node... We can't determine hook names etc, so we 656 * stay pretty impartial.... 657 */ 658 log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name); 659 660 if ((dev = malloc(sizeof *dev)) == NULL) { 661 log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n", 662 p->link.name, strerror(errno)); 663 return NULL; 664 } 665 666 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 667 dev->cs = -1; 668 dev->timeout = 0; 669 dev->connected = CARRIER_OK; 670 *dev->hook = '\0'; 671 } 672 } 673 } 674 675 if (dev) { 676 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 677 678 /* Moan about (and fix) invalid LCP configurations */ 679 if (p->link.lcp.cfg.mru > 1492) { 680 log_Printf(LogWARN, "%s: Reducing MRU to 1492\n", p->link.name); 681 p->link.lcp.cfg.mru = 1492; 682 } 683 if (p->dl->bundle->cfg.mtu > 1492) { 684 log_Printf(LogWARN, "%s: Reducing MTU to 1492\n", p->link.name); 685 p->dl->bundle->cfg.mtu = 1492; 686 } 687 688 if (path != NULL) { 689 /* Mark the interface as UP if it's not already */ 690 691 path[ifacelen] = '\0'; /* Remove the trailing ':' */ 692 if (!iface_SetFlags(path, IFF_UP)) 693 log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n", 694 p->link.name, path); 695 } 696 697 return &dev->dev; 698 } 699 700 return NULL; 701 } 702