ether.c revision 99086 
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: head/usr.sbin/ppp/ether.c 99086 2002-06-29 18:49:08Z brian $
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#include <sys/stat.h>
53#include <sys/uio.h>
54#include <termios.h>
55#include <sys/time.h>
56#include <syslog.h>
57#include <unistd.h>
58
59#include "layer.h"
60#include "defs.h"
61#include "mbuf.h"
62#include "log.h"
63#include "timer.h"
64#include "lqr.h"
65#include "hdlc.h"
66#include "throughput.h"
67#include "fsm.h"
68#include "lcp.h"
69#include "ccp.h"
70#include "link.h"
71#include "async.h"
72#include "descriptor.h"
73#include "physical.h"
74#include "main.h"
75#include "mp.h"
76#include "chat.h"
77#include "auth.h"
78#include "chap.h"
79#include "cbcp.h"
80#include "datalink.h"
81#include "slcompress.h"
82#include "iplist.h"
83#include "ncpaddr.h"
84#include "ip.h"
85#include "ipcp.h"
86#include "filter.h"
87#ifndef NORADIUS
88#include "radius.h"
89#endif
90#include "ipv6cp.h"
91#include "ncp.h"
92#include "bundle.h"
93#include "id.h"
94#include "iface.h"
95#include "route.h"
96#include "ether.h"
97
98
99#define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */
100
101struct etherdevice {
102  struct device dev;			/* What struct physical knows about */
103  int cs;				/* Control socket */
104  int connected;			/* Are we connected yet ? */
105  int timeout;				/* Seconds attempting to connect */
106  char hook[sizeof TUN_NAME + 11];	/* Our socket node hook */
107  u_int32_t slot;			/* ifindex << 24 | unit */
108};
109
110#define device2ether(d) \
111  ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL)
112
113int
114ether_DeviceSize(void)
115{
116  return sizeof(struct etherdevice);
117}
118
119static ssize_t
120ether_Write(struct physical *p, const void *v, size_t n)
121{
122  struct etherdevice *dev = device2ether(p->handler);
123
124  return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n;
125}
126
127static ssize_t
128ether_Read(struct physical *p, void *v, size_t n)
129{
130  char hook[sizeof TUN_NAME + 11];
131
132  return NgRecvData(p->fd, v, n, hook);
133}
134
135static int
136ether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
137{
138  struct etherdevice *dev = device2ether(p->handler);
139  int result;
140
141  if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) {
142    FD_CLR(dev->cs, r);
143    log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs);
144    result = 1;
145  } else
146    result = 0;
147
148  /* Careful... physical_RemoveFromSet() called us ! */
149
150  p->handler->removefromset = NULL;
151  result += physical_RemoveFromSet(p, r, w, e);
152  p->handler->removefromset = ether_RemoveFromSet;
153
154  return result;
155}
156
157static void
158ether_Free(struct physical *p)
159{
160  struct etherdevice *dev = device2ether(p->handler);
161
162  physical_SetDescriptor(p);
163  if (dev->cs != -1)
164    close(dev->cs);
165  free(dev);
166}
167
168static const char *
169ether_OpenInfo(struct physical *p)
170{
171  struct etherdevice *dev = device2ether(p->handler);
172
173  switch (dev->connected) {
174    case CARRIER_PENDING:
175      return "negotiating";
176    case CARRIER_OK:
177      return "established";
178  }
179
180  return "disconnected";
181}
182
183static int
184ether_Slot(struct physical *p)
185{
186  struct etherdevice *dev = device2ether(p->handler);
187
188  return dev->slot;
189}
190
191
192static void
193ether_device2iov(struct device *d, struct iovec *iov, int *niov,
194                 int maxiov, int *auxfd, int *nauxfd)
195{
196  struct etherdevice *dev = device2ether(d);
197  int sz = physical_MaxDeviceSize();
198
199  iov[*niov].iov_base = realloc(d, sz);
200  if (iov[*niov].iov_base == NULL) {
201    log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
202    AbortProgram(EX_OSERR);
203  }
204  iov[*niov].iov_len = sz;
205  (*niov)++;
206
207  if (dev->cs >= 0) {
208    *auxfd = dev->cs;
209    (*nauxfd)++;
210  }
211}
212
213static void
214ether_MessageIn(struct etherdevice *dev)
215{
216  char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)];
217  struct ng_mesg *rep = (struct ng_mesg *)msgbuf;
218  struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep);
219  char *end, unknown[14], sessionid[5];
220  const char *msg;
221  struct timeval t;
222  fd_set *r;
223  u_long slot;
224  int asciilen, ret;
225
226  if (dev->cs < 0)
227    return;
228
229  if ((r = mkfdset()) == NULL) {
230    log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n");
231    return;
232  }
233
234  while (1) {
235    zerofdset(r);
236    FD_SET(dev->cs, r);
237    t.tv_sec = t.tv_usec = 0;
238    ret = select(dev->cs + 1, r, NULL, NULL, &t);
239
240    if (ret <= 0)
241      break;
242
243    if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) <= 0)
244      break;
245
246    if (rep->header.version != NG_VERSION) {
247      log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n",
248                 (long)rep->header.version, (long)NG_VERSION);
249      break;
250    }
251
252    if (rep->header.typecookie != NGM_PPPOE_COOKIE) {
253      log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n",
254                 (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE);
255      break;
256    }
257
258    asciilen = 0;
259    switch (rep->header.cmd) {
260      case NGM_PPPOE_SET_FLAG:	msg = "SET_FLAG";	break;
261      case NGM_PPPOE_CONNECT:	msg = "CONNECT";	break;
262      case NGM_PPPOE_LISTEN:	msg = "LISTEN";		break;
263      case NGM_PPPOE_OFFER:	msg = "OFFER";		break;
264      case NGM_PPPOE_SUCCESS:	msg = "SUCCESS";	break;
265      case NGM_PPPOE_FAIL:	msg = "FAIL";		break;
266      case NGM_PPPOE_CLOSE:	msg = "CLOSE";		break;
267      case NGM_PPPOE_GET_STATUS:	msg = "GET_STATUS";	break;
268      case NGM_PPPOE_ACNAME:
269        msg = "ACNAME";
270        if (setenv("ACNAME", sts->hook, 1) != 0)
271          log_Printf(LogWARN, "setenv: cannot set ACNAME=%s: %m", sts->hook);
272        asciilen = rep->header.arglen;
273        break;
274      case NGM_PPPOE_SESSIONID:
275        msg = "SESSIONID";
276        snprintf(sessionid, sizeof sessionid, "%04x", *(u_int16_t *)sts);
277        if (setenv("SESSIONID", sessionid, 1) != 0)
278          syslog(LOG_WARNING, "setenv: cannot set SESSIONID=%s: %m",
279                 sessionid);
280        /* Use this in preference to our interface index */
281        slot = strtoul(sessionid, &end, 16);
282        if (end != sessionid && *end == '\0')
283            dev->slot = slot;
284        break;
285      default:
286        snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd);
287        msg = unknown;
288        break;
289    }
290
291    if (asciilen)
292      log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%.*s\")\n",
293                 msg, asciilen, sts->hook);
294    else
295      log_Printf(LogPHASE, "Received NGM_PPPOE_%s\n", msg);
296
297    switch (rep->header.cmd) {
298      case NGM_PPPOE_SUCCESS:
299        dev->connected = CARRIER_OK;
300        break;
301      case NGM_PPPOE_FAIL:
302      case NGM_PPPOE_CLOSE:
303        dev->connected = CARRIER_LOST;
304        break;
305    }
306  }
307  free(r);
308}
309
310static int
311ether_AwaitCarrier(struct physical *p)
312{
313  struct etherdevice *dev = device2ether(p->handler);
314
315  if (dev->connected != CARRIER_OK && !dev->timeout--)
316    dev->connected = CARRIER_LOST;
317  else if (dev->connected == CARRIER_PENDING)
318    ether_MessageIn(dev);
319
320  return dev->connected;
321}
322
323static const struct device baseetherdevice = {
324  ETHER_DEVICE,
325  "ether",
326  1492,
327  { CD_REQUIRED, DEF_ETHERCDDELAY },
328  ether_AwaitCarrier,
329  ether_RemoveFromSet,
330  NULL,
331  NULL,
332  NULL,
333  NULL,
334  NULL,
335  ether_Free,
336  ether_Read,
337  ether_Write,
338  ether_device2iov,
339  NULL,
340  ether_OpenInfo,
341  ether_Slot
342};
343
344struct device *
345ether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
346                 int maxiov, int *auxfd, int *nauxfd)
347{
348  if (type == ETHER_DEVICE) {
349    struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base;
350
351    dev = realloc(dev, sizeof *dev);	/* Reduce to the correct size */
352    if (dev == NULL) {
353      log_Printf(LogALERT, "Failed to allocate memory: %d\n",
354                 (int)(sizeof *dev));
355      AbortProgram(EX_OSERR);
356    }
357
358    if (*nauxfd) {
359      dev->cs = *auxfd;
360      (*nauxfd)--;
361    } else
362      dev->cs = -1;
363
364    /* Refresh function pointers etc */
365    memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);
366
367    physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
368    return &dev->dev;
369  }
370
371  return NULL;
372}
373
374static int
375ether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
376{
377  struct physical *p = descriptor2physical(d);
378  struct etherdevice *dev = device2ether(p->handler);
379  int result;
380
381  if (r && dev->cs >= 0) {
382    FD_SET(dev->cs, r);
383    log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs);
384    result = 1;
385  } else
386    result = 0;
387
388  result += physical_doUpdateSet(d, r, w, e, n, 0);
389
390  return result;
391}
392
393static int
394ether_IsSet(struct fdescriptor *d, const fd_set *fdset)
395{
396  struct physical *p = descriptor2physical(d);
397  struct etherdevice *dev = device2ether(p->handler);
398  int result;
399
400  result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset);
401  result += physical_IsSet(d, fdset);
402
403  return result;
404}
405
406static void
407ether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
408                     const fd_set *fdset)
409{
410  struct physical *p = descriptor2physical(d);
411  struct etherdevice *dev = device2ether(p->handler);
412
413  if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) {
414    ether_MessageIn(dev);
415    if (dev->connected == CARRIER_LOST) {
416      log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name);
417      datalink_Down(p->dl, CLOSE_NORMAL);
418      return;
419    }
420  }
421
422  if (physical_IsSet(d, fdset))
423    physical_DescriptorRead(d, bundle, fdset);
424}
425
426static struct device *
427ether_Abandon(struct etherdevice *dev, struct physical *p)
428{
429  /* Abandon our node construction */
430  close(dev->cs);
431  close(p->fd);
432  p->fd = -2;	/* Nobody else need try.. */
433  free(dev);
434
435  return NULL;
436}
437
438struct device *
439ether_Create(struct physical *p)
440{
441  u_char rbuf[2048];
442  struct etherdevice *dev;
443  struct ng_mesg *resp;
444  const struct hooklist *hlist;
445  const struct nodeinfo *ninfo;
446  char *path, *sessionid;
447  int ifacelen, f;
448
449  dev = NULL;
450  path = NULL;
451  ifacelen = 0;
452  if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE,
453                                PPPOE_NODE_TYPE_LEN) &&
454      p->name.full[PPPOE_NODE_TYPE_LEN] == ':') {
455    const struct linkinfo *nlink;
456    struct ngpppoe_init_data *data;
457    struct ngm_mkpeer mkp;
458    struct ngm_connect ngc;
459    const char *iface, *provider;
460    char etherid[12];
461    int providerlen;
462    char connectpath[sizeof dev->hook + 2];	/* .:<hook> */
463
464    p->fd--;				/* We own the device - change fd */
465
466    loadmodules(LOAD_VERBOSLY, "netgraph", "ng_ether", "ng_pppoe", "ng_socket",
467                NULL);
468
469    if ((dev = malloc(sizeof *dev)) == NULL)
470      return NULL;
471
472    iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1;
473
474    provider = strchr(iface, ':');
475    if (provider) {
476      ifacelen = provider - iface;
477      provider++;
478      providerlen = strlen(provider);
479    } else {
480      ifacelen = strlen(iface);
481      provider = "";
482      providerlen = 0;
483    }
484
485    /*
486     * We're going to do this (where tunN is our tunnel device):
487     *
488     * .---------.
489     * |  ether  |
490     * | <iface> |                         dev->cs
491     * `---------'                           |
492     *  (orphan)                     p->fd   |
493     *     |                           |     |
494     *     |                           |     |
495     * (ethernet)                      |     |
496     * .---------.                  .-----------.
497     * |  pppoe  |                  |  socket   |
498     * | <iface> |(tunN)<---->(tunN)| <unnamed> |
499     * `---------                   `-----------'
500     *   (tunX)
501     *     ^
502     *     |
503     *     `--->(tunX)
504     */
505
506    /* Create a socket node */
507    if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) {
508      log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n",
509                 strerror(errno));
510      free(dev);
511      p->fd = -2;
512      return NULL;
513    }
514
515    /*
516     * Ask for a list of hooks attached to the "ether" node.  This node should
517     * magically exist as a way of hooking stuff onto an ethernet device
518     */
519    path = (char *)alloca(ifacelen + 2);
520    sprintf(path, "%.*s:", ifacelen, iface);
521    if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
522                  NULL, 0) < 0) {
523      log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n",
524                 path, strerror(errno));
525      return ether_Abandon(dev, p);
526    }
527
528    /* Get our list back */
529    resp = (struct ng_mesg *)rbuf;
530    if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) {
531      log_Printf(LogWARN, "Cannot get netgraph response: %s\n",
532                 strerror(errno));
533      return ether_Abandon(dev, p);
534    }
535
536    hlist = (const struct hooklist *)resp->data;
537    ninfo = &hlist->nodeinfo;
538
539    /* Make sure we've got the right type of node */
540    if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE,
541                sizeof NG_ETHER_NODE_TYPE - 1)) {
542      log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``"
543                 NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type);
544      return ether_Abandon(dev, p);
545    }
546
547    log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n",
548               path, ninfo->id);
549
550    /* look for a hook already attached.  */
551    for (f = 0; f < ninfo->hooks; f++) {
552      nlink = &hlist->link[f];
553
554      log_Printf(LogDEBUG, "  Found %s -> %s\n", nlink->ourhook,
555                 nlink->peerhook);
556
557      if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) ||
558          !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) {
559        /*
560         * Something is using the data coming out of this ``ether'' node.
561         * If it's a PPPoE node, we use that node, otherwise we complain that
562         * someone else is using the node.
563         */
564        if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE))
565          /* Use this PPPoE node ! */
566          snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id);
567        else {
568          log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n",
569                     path, nlink->nodeinfo.type);
570          return ether_Abandon(dev, p);
571        }
572        break;
573      }
574    }
575
576    if (f == ninfo->hooks) {
577      /*
578       * Create a new ``PPPoE'' node connected to the ``ether'' node using
579       * the ``orphan'' and ``ethernet'' hooks
580       */
581      snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE);
582      snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN);
583      snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET);
584      snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id);
585
586      log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n",
587                 etherid, mkp.ourhook, mkp.peerhook);
588
589      if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE,
590                    NGM_MKPEER, &mkp, sizeof mkp) < 0) {
591        log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n",
592                   etherid, strerror(errno));
593        return ether_Abandon(dev, p);
594      }
595
596      snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN);
597    }
598
599    snprintf(dev->hook, sizeof dev->hook, "%s%d",
600             TUN_NAME, p->dl->bundle->unit);
601
602    /*
603     * Connect the PPPoE node to our socket node.
604     * ngc.path has already been set up
605     */
606    snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook);
607    memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook);
608
609    log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n",
610               ngc.ourhook, ngc.path, ngc.peerhook);
611    if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE,
612                  NGM_CONNECT, &ngc, sizeof ngc) < 0) {
613      log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph "
614                 "nodes: %s\n", strerror(errno));
615      return ether_Abandon(dev, p);
616    }
617
618    /* Bring the Ethernet interface up */
619    path[ifacelen] = '\0';	/* Remove the trailing ':' */
620    if (!iface_SetFlags(path, IFF_UP))
621      log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n",
622                 p->link.name, path);
623
624    /* And finally, request a connection to the given provider */
625
626    data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen);
627    snprintf(data->hook, sizeof data->hook, "%s", dev->hook);
628    memcpy(data->data, provider, providerlen);
629    data->data_len = providerlen;
630
631    snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook);
632    log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath);
633    if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE,
634                  NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) {
635      log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n",
636                 connectpath, strerror(errno));
637      return ether_Abandon(dev, p);
638    }
639
640    /* Hook things up so that we monitor dev->cs */
641    p->desc.UpdateSet = ether_UpdateSet;
642    p->desc.IsSet = ether_IsSet;
643    p->desc.Read = ether_DescriptorRead;
644
645    memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);
646    switch (p->cfg.cd.necessity) {
647      case CD_VARIABLE:
648        dev->dev.cd.delay = p->cfg.cd.delay;
649        break;
650      case CD_REQUIRED:
651        dev->dev.cd = p->cfg.cd;
652        break;
653      case CD_NOTREQUIRED:
654        log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n",
655                   p->link.name, dev->dev.cd.delay);
656      case CD_DEFAULT:
657        break;
658    }
659
660    dev->timeout = dev->dev.cd.delay;
661    dev->connected = CARRIER_PENDING;
662    /* This will be overridden by our session id - if provided by netgraph */
663    dev->slot = GetIfIndex(path);
664  } else {
665    /* See if we're a netgraph socket */
666    struct stat st;
667
668    if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
669      struct sockaddr_storage ssock;
670      struct sockaddr *sock = (struct sockaddr *)&ssock;
671      int sz;
672
673      sz = sizeof ssock;
674      if (getsockname(p->fd, sock, &sz) == -1) {
675        log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
676        close(p->fd);
677        p->fd = -1;
678        return NULL;
679      }
680
681      if (sock->sa_family == AF_NETGRAPH) {
682        /*
683         * It's a netgraph node... We can't determine hook names etc, so we
684         * stay pretty impartial....
685         */
686        log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name);
687
688        if ((dev = malloc(sizeof *dev)) == NULL) {
689          log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n",
690                     p->link.name, strerror(errno));
691          return NULL;
692        }
693
694        memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);
695        dev->cs = -1;
696        dev->timeout = 0;
697        dev->connected = CARRIER_OK;
698        *dev->hook = '\0';
699
700        /*
701         * If we're being envoked from pppoed(8), we may have a SESSIONID
702         * set in the environment.  If so, use it as the slot
703         */
704        if ((sessionid = getenv("SESSIONID")) != NULL) {
705          char *end;
706          u_long slot;
707
708          slot = strtoul(sessionid, &end, 16);
709          dev->slot = end != sessionid && *end == '\0' ? slot : 0;
710        } else
711          dev->slot = 0;
712      }
713    }
714  }
715
716  if (dev) {
717    physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
718    return &dev->dev;
719  }
720
721  return NULL;
722}
723