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 "ncpaddr.h" 87 #include "ip.h" 88 #include "ipcp.h" 89 #include "filter.h" 90 #ifndef NORADIUS 91 #include "radius.h" 92 #endif 93 #include "ipv6cp.h" 94 #include "ncp.h" 95 #include "bundle.h" 96 #include "id.h" 97 #include "iface.h" 98 #include "ether.h" 99 100 101 #define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */ 102 103 struct etherdevice { 104 struct device dev; /* What struct physical knows about */ 105 int cs; /* Control socket */ 106 int connected; /* Are we connected yet ? */ 107 int timeout; /* Seconds attempting to connect */ 108 char hook[sizeof TUN_NAME + 11]; /* Our socket node hook */ 109 }; 110 111 #define device2ether(d) \ 112 ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL) 113 114 int 115 ether_DeviceSize(void) 116 { 117 return sizeof(struct etherdevice); 118 } 119 120 static ssize_t 121 ether_Write(struct physical *p, const void *v, size_t n) 122 { 123 struct etherdevice *dev = device2ether(p->handler); 124 125 return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n; 126 } 127 128 static ssize_t 129 ether_Read(struct physical *p, void *v, size_t n) 130 { 131 char hook[sizeof TUN_NAME + 11]; 132 133 return NgRecvData(p->fd, v, n, hook); 134 } 135 136 static int 137 ether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e) 138 { 139 struct etherdevice *dev = device2ether(p->handler); 140 int result; 141 142 if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) { 143 FD_CLR(dev->cs, r); 144 log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs); 145 result = 1; 146 } else 147 result = 0; 148 149 /* Careful... physical_RemoveFromSet() called us ! */ 150 151 p->handler->removefromset = NULL; 152 result += physical_RemoveFromSet(p, r, w, e); 153 p->handler->removefromset = ether_RemoveFromSet; 154 155 return result; 156 } 157 158 static void 159 ether_Free(struct physical *p) 160 { 161 struct etherdevice *dev = device2ether(p->handler); 162 163 physical_SetDescriptor(p); 164 if (dev->cs != -1) 165 close(dev->cs); 166 free(dev); 167 } 168 169 static const char * 170 ether_OpenInfo(struct physical *p) 171 { 172 struct etherdevice *dev = device2ether(p->handler); 173 174 switch (dev->connected) { 175 case CARRIER_PENDING: 176 return "negotiating"; 177 case CARRIER_OK: 178 return "established"; 179 } 180 181 return "disconnected"; 182 } 183 184 static void 185 ether_device2iov(struct device *d, struct iovec *iov, int *niov, 186 int maxiov, int *auxfd, int *nauxfd) 187 { 188 struct etherdevice *dev = device2ether(d); 189 int sz = physical_MaxDeviceSize(); 190 191 iov[*niov].iov_base = realloc(d, sz); 192 if (iov[*niov].iov_base == NULL) { 193 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz); 194 AbortProgram(EX_OSERR); 195 } 196 iov[*niov].iov_len = sz; 197 (*niov)++; 198 199 if (dev->cs >= 0) { 200 *auxfd = dev->cs; 201 (*nauxfd)++; 202 } 203 } 204 205 static void 206 ether_MessageIn(struct etherdevice *dev) 207 { 208 char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)]; 209 struct ng_mesg *rep = (struct ng_mesg *)msgbuf; 210 struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep); 211 char unknown[14]; 212 const char *msg; 213 struct timeval t; 214 fd_set *r; 215 int ret; 216 217 if (dev->cs < 0) 218 return; 219 220 if ((r = mkfdset()) == NULL) { 221 log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n"); 222 return; 223 } 224 zerofdset(r); 225 FD_SET(dev->cs, r); 226 t.tv_sec = t.tv_usec = 0; 227 ret = select(dev->cs + 1, r, NULL, NULL, &t); 228 free(r); 229 230 if (ret <= 0) 231 return; 232 233 if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) <= 0) 234 return; 235 236 if (rep->header.version != NG_VERSION) { 237 log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n", 238 (long)rep->header.version, (long)NG_VERSION); 239 return; 240 } 241 242 if (rep->header.typecookie != NGM_PPPOE_COOKIE) { 243 log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n", 244 (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE); 245 return; 246 } 247 248 switch (rep->header.cmd) { 249 case NGM_PPPOE_SET_FLAG: msg = "SET_FLAG"; break; 250 case NGM_PPPOE_CONNECT: msg = "CONNECT"; break; 251 case NGM_PPPOE_LISTEN: msg = "LISTEN"; break; 252 case NGM_PPPOE_OFFER: msg = "OFFER"; break; 253 case NGM_PPPOE_SUCCESS: msg = "SUCCESS"; break; 254 case NGM_PPPOE_FAIL: msg = "FAIL"; break; 255 case NGM_PPPOE_CLOSE: msg = "CLOSE"; break; 256 case NGM_PPPOE_GET_STATUS: msg = "GET_STATUS"; break; 257 default: 258 snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd); 259 msg = unknown; 260 break; 261 } 262 263 log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%s\")\n", msg, sts->hook); 264 265 switch (rep->header.cmd) { 266 case NGM_PPPOE_SUCCESS: 267 dev->connected = CARRIER_OK; 268 break; 269 case NGM_PPPOE_FAIL: 270 case NGM_PPPOE_CLOSE: 271 dev->connected = CARRIER_LOST; 272 break; 273 } 274 } 275 276 static int 277 ether_AwaitCarrier(struct physical *p) 278 { 279 struct etherdevice *dev = device2ether(p->handler); 280 281 if (dev->connected != CARRIER_OK && !dev->timeout--) 282 dev->connected = CARRIER_LOST; 283 else if (dev->connected == CARRIER_PENDING) 284 ether_MessageIn(dev); 285 286 return dev->connected; 287 } 288 289 static const struct device baseetherdevice = { 290 ETHER_DEVICE, 291 "ether", 292 1492, 293 { CD_REQUIRED, DEF_ETHERCDDELAY }, 294 ether_AwaitCarrier, 295 ether_RemoveFromSet, 296 NULL, 297 NULL, 298 NULL, 299 NULL, 300 ether_Free, 301 ether_Read, 302 ether_Write, 303 ether_device2iov, 304 NULL, 305 ether_OpenInfo 306 }; 307 308 struct device * 309 ether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, 310 int maxiov, int *auxfd, int *nauxfd) 311 { 312 if (type == ETHER_DEVICE) { 313 struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base; 314 315 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */ 316 if (dev == NULL) { 317 log_Printf(LogALERT, "Failed to allocate memory: %d\n", 318 (int)(sizeof *dev)); 319 AbortProgram(EX_OSERR); 320 } 321 322 if (*nauxfd) { 323 dev->cs = *auxfd; 324 (*nauxfd)--; 325 } else 326 dev->cs = -1; 327 328 /* Refresh function pointers etc */ 329 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 330 331 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 332 return &dev->dev; 333 } 334 335 return NULL; 336 } 337 338 static int 339 ether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n) 340 { 341 struct physical *p = descriptor2physical(d); 342 struct etherdevice *dev = device2ether(p->handler); 343 int result; 344 345 if (r && dev->cs >= 0) { 346 FD_SET(dev->cs, r); 347 log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs); 348 result = 1; 349 } else 350 result = 0; 351 352 result += physical_doUpdateSet(d, r, w, e, n, 0); 353 354 return result; 355 } 356 357 static int 358 ether_IsSet(struct fdescriptor *d, const fd_set *fdset) 359 { 360 struct physical *p = descriptor2physical(d); 361 struct etherdevice *dev = device2ether(p->handler); 362 int result; 363 364 result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset); 365 result += physical_IsSet(d, fdset); 366 367 return result; 368 } 369 370 static void 371 ether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle, 372 const fd_set *fdset) 373 { 374 struct physical *p = descriptor2physical(d); 375 struct etherdevice *dev = device2ether(p->handler); 376 377 if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) { 378 ether_MessageIn(dev); 379 if (dev->connected == CARRIER_LOST) { 380 log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name); 381 datalink_Down(p->dl, CLOSE_NORMAL); 382 return; 383 } 384 } 385 386 if (physical_IsSet(d, fdset)) 387 physical_DescriptorRead(d, bundle, fdset); 388 } 389 390 static struct device * 391 ether_Abandon(struct etherdevice *dev, struct physical *p) 392 { 393 /* Abandon our node construction */ 394 close(dev->cs); 395 close(p->fd); 396 p->fd = -2; /* Nobody else need try.. */ 397 free(dev); 398 399 return NULL; 400 } 401 402 struct device * 403 ether_Create(struct physical *p) 404 { 405 u_char rbuf[2048]; 406 struct etherdevice *dev; 407 struct ng_mesg *resp; 408 const struct hooklist *hlist; 409 const struct nodeinfo *ninfo; 410 char *path; 411 int ifacelen, f; 412 413 dev = NULL; 414 path = NULL; 415 ifacelen = 0; 416 if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE, 417 PPPOE_NODE_TYPE_LEN) && 418 p->name.full[PPPOE_NODE_TYPE_LEN] == ':') { 419 const struct linkinfo *nlink; 420 struct ngpppoe_init_data *data; 421 struct ngm_mkpeer mkp; 422 struct ngm_connect ngc; 423 const char *iface, *provider; 424 char etherid[12]; 425 int providerlen; 426 char connectpath[sizeof dev->hook + 2]; /* .:<hook> */ 427 428 p->fd--; /* We own the device - change fd */ 429 430 #if defined(__FreeBSD__) && !defined(NOKLDLOAD) 431 if (modfind("netgraph") == -1 && ID0kldload("netgraph") == -1) { 432 log_Printf(LogWARN, "kldload: netgraph: %s\n", strerror(errno)); 433 return NULL; 434 } 435 436 if (modfind("ng_ether") == -1 && ID0kldload("ng_ether") == -1) 437 /* 438 * Don't treat this as an error as older kernels have this stuff 439 * built in as part of the netgraph node itself. 440 */ 441 log_Printf(LogWARN, "kldload: ng_ether: %s\n", strerror(errno)); 442 443 if (modfind("ng_pppoe") == -1 && ID0kldload("ng_pppoe") == -1) { 444 log_Printf(LogWARN, "kldload: ng_pppoe: %s\n", strerror(errno)); 445 return NULL; 446 } 447 448 if (modfind("ng_socket") == -1 && ID0kldload("ng_socket") == -1) { 449 log_Printf(LogWARN, "kldload: ng_socket: %s\n", strerror(errno)); 450 return NULL; 451 } 452 #endif 453 454 if ((dev = malloc(sizeof *dev)) == NULL) 455 return NULL; 456 457 iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1; 458 459 provider = strchr(iface, ':'); 460 if (provider) { 461 ifacelen = provider - iface; 462 provider++; 463 providerlen = strlen(provider); 464 } else { 465 ifacelen = strlen(iface); 466 provider = ""; 467 providerlen = 0; 468 } 469 470 /* 471 * We're going to do this (where tunN is our tunnel device): 472 * 473 * .---------. 474 * | ether | 475 * | <iface> | dev->cs 476 * `---------' | 477 * (orphan) p->fd | 478 * | | | 479 * | | | 480 * (ethernet) | | 481 * .---------. .-----------. 482 * | pppoe | | socket | 483 * | <iface> |(tunN)<---->(tunN)| <unnamed> | 484 * `--------- `-----------' 485 * (tunX) 486 * ^ 487 * | 488 * `--->(tunX) 489 */ 490 491 /* Create a socket node */ 492 if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) { 493 log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n", 494 strerror(errno)); 495 free(dev); 496 return NULL; 497 } 498 499 /* 500 * Ask for a list of hooks attached to the "ether" node. This node should 501 * magically exist as a way of hooking stuff onto an ethernet device 502 */ 503 path = (char *)alloca(ifacelen + 2); 504 sprintf(path, "%.*s:", ifacelen, iface); 505 if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS, 506 NULL, 0) < 0) { 507 log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n", 508 path, strerror(errno)); 509 return ether_Abandon(dev, p); 510 } 511 512 /* Get our list back */ 513 resp = (struct ng_mesg *)rbuf; 514 if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) { 515 log_Printf(LogWARN, "Cannot get netgraph response: %s\n", 516 strerror(errno)); 517 return ether_Abandon(dev, p); 518 } 519 520 hlist = (const struct hooklist *)resp->data; 521 ninfo = &hlist->nodeinfo; 522 523 /* Make sure we've got the right type of node */ 524 if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE, 525 sizeof NG_ETHER_NODE_TYPE - 1)) { 526 log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``" 527 NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type); 528 return ether_Abandon(dev, p); 529 } 530 531 log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n", 532 path, ninfo->id); 533 534 /* look for a hook already attached. */ 535 for (f = 0; f < ninfo->hooks; f++) { 536 nlink = &hlist->link[f]; 537 538 log_Printf(LogDEBUG, " Found %s -> %s\n", nlink->ourhook, 539 nlink->peerhook); 540 541 if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) || 542 !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) { 543 /* 544 * Something is using the data coming out of this ``ether'' node. 545 * If it's a PPPoE node, we use that node, otherwise we complain that 546 * someone else is using the node. 547 */ 548 if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE)) 549 /* Use this PPPoE node ! */ 550 snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id); 551 else { 552 log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n", 553 path, nlink->nodeinfo.type); 554 return ether_Abandon(dev, p); 555 } 556 break; 557 } 558 } 559 560 if (f == ninfo->hooks) { 561 /* 562 * Create a new ``PPPoE'' node connected to the ``ether'' node using 563 * the magic ``orphan'' and ``ethernet'' hooks 564 */ 565 snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE); 566 snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN); 567 snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET); 568 snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id); 569 570 log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n", 571 etherid, mkp.ourhook, mkp.peerhook); 572 573 if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE, 574 NGM_MKPEER, &mkp, sizeof mkp) < 0) { 575 log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n", 576 etherid, strerror(errno)); 577 return ether_Abandon(dev, p); 578 } 579 580 snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN); 581 } 582 583 snprintf(dev->hook, sizeof dev->hook, "%s%d", 584 TUN_NAME, p->dl->bundle->unit); 585 586 /* 587 * Connect the PPPoE node to our socket node. 588 * ngc.path has already been set up 589 */ 590 snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook); 591 memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook); 592 593 log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n", 594 ngc.ourhook, ngc.path, ngc.peerhook); 595 if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE, 596 NGM_CONNECT, &ngc, sizeof ngc) < 0) { 597 log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph " 598 "nodes: %s\n", strerror(errno)); 599 return ether_Abandon(dev, p); 600 } 601 602 /* Bring the Ethernet interface up */ 603 path[ifacelen] = '\0'; /* Remove the trailing ':' */ 604 if (!iface_SetFlags(path, IFF_UP)) 605 log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n", 606 p->link.name, path); 607 608 /* And finally, request a connection to the given provider */ 609 610 data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen); 611 snprintf(data->hook, sizeof data->hook, "%s", dev->hook); 612 memcpy(data->data, provider, providerlen); 613 data->data_len = providerlen; 614 615 snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook); 616 log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath); 617 if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE, 618 NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) { 619 log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n", 620 connectpath, strerror(errno)); 621 return ether_Abandon(dev, p); 622 } 623 624 /* Hook things up so that we monitor dev->cs */ 625 p->desc.UpdateSet = ether_UpdateSet; 626 p->desc.IsSet = ether_IsSet; 627 p->desc.Read = ether_DescriptorRead; 628 629 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 630 switch (p->cfg.cd.necessity) { 631 case CD_VARIABLE: 632 dev->dev.cd.delay = p->cfg.cd.delay; 633 break; 634 case CD_REQUIRED: 635 dev->dev.cd = p->cfg.cd; 636 break; 637 case CD_NOTREQUIRED: 638 log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n", 639 p->link.name, dev->dev.cd.delay); 640 case CD_DEFAULT: 641 break; 642 } 643 644 dev->timeout = dev->dev.cd.delay; 645 dev->connected = CARRIER_PENDING; 646 647 } else { 648 /* See if we're a netgraph socket */ 649 struct stat st; 650 651 if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 652 struct sockaddr_storage ssock; 653 struct sockaddr *sock = (struct sockaddr *)&ssock; 654 int sz; 655 656 sz = sizeof ssock; 657 if (getsockname(p->fd, sock, &sz) == -1) { 658 log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 659 close(p->fd); 660 p->fd = -1; 661 return NULL; 662 } 663 664 if (sock->sa_family == AF_NETGRAPH) { 665 /* 666 * It's a netgraph node... We can't determine hook names etc, so we 667 * stay pretty impartial.... 668 */ 669 log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name); 670 671 if ((dev = malloc(sizeof *dev)) == NULL) { 672 log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n", 673 p->link.name, strerror(errno)); 674 return NULL; 675 } 676 677 memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev); 678 dev->cs = -1; 679 dev->timeout = 0; 680 dev->connected = CARRIER_OK; 681 *dev->hook = '\0'; 682 } 683 } 684 } 685 686 if (dev) { 687 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF); 688 return &dev->dev; 689 } 690 691 return NULL; 692 } 693