summaryrefslogtreecommitdiffstats
path: root/usr.sbin/ppp/ether.c
blob: 77ad7e51a7be108ef94fb2909f6896e025b86e84 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
/*-
 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netgraph.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netgraph/ng_ether.h>
#include <netgraph/ng_message.h>
#include <netgraph/ng_pppoe.h>
#include <netgraph/ng_socket.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <termios.h>
#include <sys/time.h>
#include <syslog.h>
#include <unistd.h>

#include "layer.h"
#include "defs.h"
#include "mbuf.h"
#include "log.h"
#include "timer.h"
#include "lqr.h"
#include "hdlc.h"
#include "throughput.h"
#include "fsm.h"
#include "lcp.h"
#include "ccp.h"
#include "link.h"
#include "async.h"
#include "descriptor.h"
#include "physical.h"
#include "main.h"
#include "mp.h"
#include "chat.h"
#include "auth.h"
#include "chap.h"
#include "cbcp.h"
#include "datalink.h"
#include "slcompress.h"
#include "iplist.h"
#include "ncpaddr.h"
#include "ip.h"
#include "ipcp.h"
#include "filter.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "ipv6cp.h"
#include "ncp.h"
#include "bundle.h"
#include "id.h"
#include "iface.h"
#include "route.h"
#include "ether.h"


#define PPPOE_NODE_TYPE_LEN (sizeof NG_PPPOE_NODE_TYPE - 1) /* "PPPoE" */

struct etherdevice {
  struct device dev;			/* What struct physical knows about */
  int cs;				/* Control socket */
  int connected;			/* Are we connected yet ? */
  int timeout;				/* Seconds attempting to connect */
  char hook[sizeof TUN_NAME + 11];	/* Our socket node hook */
  u_int32_t slot;			/* ifindex << 24 | unit */
};

#define device2ether(d) \
  ((d)->type == ETHER_DEVICE ? (struct etherdevice *)d : NULL)

int
ether_DeviceSize(void)
{
  return sizeof(struct etherdevice);
}

static ssize_t
ether_Write(struct physical *p, const void *v, size_t n)
{
  struct etherdevice *dev = device2ether(p->handler);

  return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : n;
}

static ssize_t
ether_Read(struct physical *p, void *v, size_t n)
{
  char hook[sizeof TUN_NAME + 11];

  return NgRecvData(p->fd, v, n, hook);
}

static int
ether_RemoveFromSet(struct physical *p, fd_set *r, fd_set *w, fd_set *e)
{
  struct etherdevice *dev = device2ether(p->handler);
  int result;

  if (r && dev->cs >= 0 && FD_ISSET(dev->cs, r)) {
    FD_CLR(dev->cs, r);
    log_Printf(LogTIMER, "%s: fdunset(ctrl) %d\n", p->link.name, dev->cs);
    result = 1;
  } else
    result = 0;

  /* Careful... physical_RemoveFromSet() called us ! */

  p->handler->removefromset = NULL;
  result += physical_RemoveFromSet(p, r, w, e);
  p->handler->removefromset = ether_RemoveFromSet;

  return result;
}

static void
ether_Free(struct physical *p)
{
  struct etherdevice *dev = device2ether(p->handler);

  physical_SetDescriptor(p);
  if (dev->cs != -1)
    close(dev->cs);
  free(dev);
}

static const char *
ether_OpenInfo(struct physical *p)
{
  struct etherdevice *dev = device2ether(p->handler);

  switch (dev->connected) {
    case CARRIER_PENDING:
      return "negotiating";
    case CARRIER_OK:
      return "established";
  }

  return "disconnected";
}

static int
ether_Slot(struct physical *p)
{
  struct etherdevice *dev = device2ether(p->handler);

  return dev->slot;
}


static void
ether_device2iov(struct device *d, struct iovec *iov, int *niov,
                 int maxiov, int *auxfd, int *nauxfd)
{
  struct etherdevice *dev = device2ether(d);
  int sz = physical_MaxDeviceSize();

  iov[*niov].iov_base = realloc(d, sz);
  if (iov[*niov].iov_base == NULL) {
    log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
    AbortProgram(EX_OSERR);
  }
  iov[*niov].iov_len = sz;
  (*niov)++;

  if (dev->cs >= 0) {
    *auxfd = dev->cs;
    (*nauxfd)++;
  }
}

static void
ether_MessageIn(struct etherdevice *dev)
{
  char msgbuf[sizeof(struct ng_mesg) + sizeof(struct ngpppoe_sts)];
  struct ng_mesg *rep = (struct ng_mesg *)msgbuf;
  struct ngpppoe_sts *sts = (struct ngpppoe_sts *)(msgbuf + sizeof *rep);
  char *end, unknown[14], sessionid[5];
  const char *msg;
  struct timeval t;
  fd_set *r;
  u_long slot;
  int asciilen, ret;

  if (dev->cs < 0)
    return;

  if ((r = mkfdset()) == NULL) {
    log_Printf(LogERROR, "DoLoop: Cannot create fd_set\n");
    return;
  }

  while (1) {
    zerofdset(r);
    FD_SET(dev->cs, r);
    t.tv_sec = t.tv_usec = 0;
    ret = select(dev->cs + 1, r, NULL, NULL, &t);

    if (ret <= 0)
      break;

    if (NgRecvMsg(dev->cs, rep, sizeof msgbuf, NULL) <= 0)
      break;

    if (rep->header.version != NG_VERSION) {
      log_Printf(LogWARN, "%ld: Unexpected netgraph version, expected %ld\n",
                 (long)rep->header.version, (long)NG_VERSION);
      break;
    }

    if (rep->header.typecookie != NGM_PPPOE_COOKIE) {
      log_Printf(LogWARN, "%ld: Unexpected netgraph cookie, expected %ld\n",
                 (long)rep->header.typecookie, (long)NGM_PPPOE_COOKIE);
      break;
    }

    asciilen = 0;
    switch (rep->header.cmd) {
      case NGM_PPPOE_SET_FLAG:	msg = "SET_FLAG";	break;
      case NGM_PPPOE_CONNECT:	msg = "CONNECT";	break;
      case NGM_PPPOE_LISTEN:	msg = "LISTEN";		break;
      case NGM_PPPOE_OFFER:	msg = "OFFER";		break;
      case NGM_PPPOE_SUCCESS:	msg = "SUCCESS";	break;
      case NGM_PPPOE_FAIL:	msg = "FAIL";		break;
      case NGM_PPPOE_CLOSE:	msg = "CLOSE";		break;
      case NGM_PPPOE_GET_STATUS:	msg = "GET_STATUS";	break;
      case NGM_PPPOE_ACNAME:
        msg = "ACNAME";
        if (setenv("ACNAME", sts->hook, 1) != 0)
          log_Printf(LogWARN, "setenv: cannot set ACNAME=%s: %m", sts->hook);
        asciilen = rep->header.arglen;
        break;
      case NGM_PPPOE_SESSIONID:
        msg = "SESSIONID";
        snprintf(sessionid, sizeof sessionid, "%04x", *(u_int16_t *)sts);
        if (setenv("SESSIONID", sessionid, 1) != 0)
          syslog(LOG_WARNING, "setenv: cannot set SESSIONID=%s: %m",
                 sessionid);
        /* Use this in preference to our interface index */
        slot = strtoul(sessionid, &end, 16);
        if (end != sessionid && *end == '\0')
            dev->slot = slot;
        break;
      default:
        snprintf(unknown, sizeof unknown, "<%d>", (int)rep->header.cmd);
        msg = unknown;
        break;
    }

    if (asciilen)
      log_Printf(LogPHASE, "Received NGM_PPPOE_%s (hook \"%.*s\")\n",
                 msg, asciilen, sts->hook);
    else
      log_Printf(LogPHASE, "Received NGM_PPPOE_%s\n", msg);

    switch (rep->header.cmd) {
      case NGM_PPPOE_SUCCESS:
        dev->connected = CARRIER_OK;
        break;
      case NGM_PPPOE_FAIL:
      case NGM_PPPOE_CLOSE:
        dev->connected = CARRIER_LOST;
        break;
    }
  }
  free(r);
}

static int
ether_AwaitCarrier(struct physical *p)
{
  struct etherdevice *dev = device2ether(p->handler);

  if (dev->connected != CARRIER_OK && !dev->timeout--)
    dev->connected = CARRIER_LOST;
  else if (dev->connected == CARRIER_PENDING)
    ether_MessageIn(dev);

  return dev->connected;
}

static const struct device baseetherdevice = {
  ETHER_DEVICE,
  "ether",
  1492,
  { CD_REQUIRED, DEF_ETHERCDDELAY },
  ether_AwaitCarrier,
  ether_RemoveFromSet,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  ether_Free,
  ether_Read,
  ether_Write,
  ether_device2iov,
  NULL,
  ether_OpenInfo,
  ether_Slot
};

struct device *
ether_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
                 int maxiov, int *auxfd, int *nauxfd)
{
  if (type == ETHER_DEVICE) {
    struct etherdevice *dev = (struct etherdevice *)iov[(*niov)++].iov_base;

    dev = realloc(dev, sizeof *dev);	/* Reduce to the correct size */
    if (dev == NULL) {
      log_Printf(LogALERT, "Failed to allocate memory: %d\n",
                 (int)(sizeof *dev));
      AbortProgram(EX_OSERR);
    }

    if (*nauxfd) {
      dev->cs = *auxfd;
      (*nauxfd)--;
    } else
      dev->cs = -1;

    /* Refresh function pointers etc */
    memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);

    physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
    return &dev->dev;
  }

  return NULL;
}

static int
ether_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
{
  struct physical *p = descriptor2physical(d);
  struct etherdevice *dev = device2ether(p->handler);
  int result;

  if (r && dev->cs >= 0) {
    FD_SET(dev->cs, r);
    log_Printf(LogTIMER, "%s(ctrl): fdset(r) %d\n", p->link.name, dev->cs);
    result = 1;
  } else
    result = 0;

  result += physical_doUpdateSet(d, r, w, e, n, 0);

  return result;
}

static int
ether_IsSet(struct fdescriptor *d, const fd_set *fdset)
{
  struct physical *p = descriptor2physical(d);
  struct etherdevice *dev = device2ether(p->handler);
  int result;

  result = dev->cs >= 0 && FD_ISSET(dev->cs, fdset);
  result += physical_IsSet(d, fdset);

  return result;
}

static void
ether_DescriptorRead(struct fdescriptor *d, struct bundle *bundle,
                     const fd_set *fdset)
{
  struct physical *p = descriptor2physical(d);
  struct etherdevice *dev = device2ether(p->handler);

  if (dev->cs >= 0 && FD_ISSET(dev->cs, fdset)) {
    ether_MessageIn(dev);
    if (dev->connected == CARRIER_LOST) {
      log_Printf(LogPHASE, "%s: Device disconnected\n", p->link.name);
      datalink_Down(p->dl, CLOSE_NORMAL);
      return;
    }
  }

  if (physical_IsSet(d, fdset))
    physical_DescriptorRead(d, bundle, fdset);
}

static struct device *
ether_Abandon(struct etherdevice *dev, struct physical *p)
{
  /* Abandon our node construction */
  close(dev->cs);
  close(p->fd);
  p->fd = -2;	/* Nobody else need try.. */
  free(dev);

  return NULL;
}

struct device *
ether_Create(struct physical *p)
{
  u_char rbuf[2048];
  struct etherdevice *dev;
  struct ng_mesg *resp;
  const struct hooklist *hlist;
  const struct nodeinfo *ninfo;
  char *path, *sessionid;
  int ifacelen, f;

  dev = NULL;
  path = NULL;
  ifacelen = 0;
  if (p->fd < 0 && !strncasecmp(p->name.full, NG_PPPOE_NODE_TYPE,
                                PPPOE_NODE_TYPE_LEN) &&
      p->name.full[PPPOE_NODE_TYPE_LEN] == ':') {
    const struct linkinfo *nlink;
    struct ngpppoe_init_data *data;
    struct ngm_mkpeer mkp;
    struct ngm_connect ngc;
    const char *iface, *provider;
    char etherid[12];
    int providerlen;
    char connectpath[sizeof dev->hook + 2];	/* .:<hook> */

    p->fd--;				/* We own the device - change fd */

    loadmodules(LOAD_VERBOSLY, "netgraph", "ng_ether", "ng_pppoe", "ng_socket",
                NULL);

    if ((dev = malloc(sizeof *dev)) == NULL)
      return NULL;

    iface = p->name.full + PPPOE_NODE_TYPE_LEN + 1;

    provider = strchr(iface, ':');
    if (provider) {
      ifacelen = provider - iface;
      provider++;
      providerlen = strlen(provider);
    } else {
      ifacelen = strlen(iface);
      provider = "";
      providerlen = 0;
    }

    /*
     * We're going to do this (where tunN is our tunnel device):
     *
     * .---------.
     * |  ether  |
     * | <iface> |                         dev->cs
     * `---------'                           |
     *  (orphan)                     p->fd   |
     *     |                           |     |
     *     |                           |     |
     * (ethernet)                      |     |
     * .---------.                  .-----------.
     * |  pppoe  |                  |  socket   |
     * | <iface> |(tunN)<---->(tunN)| <unnamed> |
     * `---------                   `-----------'
     *   (tunX)
     *     ^
     *     |
     *     `--->(tunX)
     */

    /* Create a socket node */
    if (ID0NgMkSockNode(NULL, &dev->cs, &p->fd) == -1) {
      log_Printf(LogWARN, "Cannot create netgraph socket node: %s\n",
                 strerror(errno));
      free(dev);
      p->fd = -2;
      return NULL;
    }

    /*
     * Ask for a list of hooks attached to the "ether" node.  This node should
     * magically exist as a way of hooking stuff onto an ethernet device
     */
    path = (char *)alloca(ifacelen + 2);
    sprintf(path, "%.*s:", ifacelen, iface);
    if (NgSendMsg(dev->cs, path, NGM_GENERIC_COOKIE, NGM_LISTHOOKS,
                  NULL, 0) < 0) {
      log_Printf(LogWARN, "%s Cannot send a netgraph message: %s\n",
                 path, strerror(errno));
      return ether_Abandon(dev, p);
    }

    /* Get our list back */
    resp = (struct ng_mesg *)rbuf;
    if (NgRecvMsg(dev->cs, resp, sizeof rbuf, NULL) <= 0) {
      log_Printf(LogWARN, "Cannot get netgraph response: %s\n",
                 strerror(errno));
      return ether_Abandon(dev, p);
    }

    hlist = (const struct hooklist *)resp->data;
    ninfo = &hlist->nodeinfo;

    /* Make sure we've got the right type of node */
    if (strncmp(ninfo->type, NG_ETHER_NODE_TYPE,
                sizeof NG_ETHER_NODE_TYPE - 1)) {
      log_Printf(LogWARN, "%s Unexpected node type ``%s'' (wanted ``"
                 NG_ETHER_NODE_TYPE "'')\n", path, ninfo->type);
      return ether_Abandon(dev, p);
    }

    log_Printf(LogDEBUG, "List of netgraph node ``%s'' (id %x) hooks:\n",
               path, ninfo->id);

    /* look for a hook already attached.  */
    for (f = 0; f < ninfo->hooks; f++) {
      nlink = &hlist->link[f];

      log_Printf(LogDEBUG, "  Found %s -> %s\n", nlink->ourhook,
                 nlink->peerhook);

      if (!strcmp(nlink->ourhook, NG_ETHER_HOOK_ORPHAN) ||
          !strcmp(nlink->ourhook, NG_ETHER_HOOK_DIVERT)) {
        /*
         * Something is using the data coming out of this ``ether'' node.
         * If it's a PPPoE node, we use that node, otherwise we complain that
         * someone else is using the node.
         */
        if (!strcmp(nlink->nodeinfo.type, NG_PPPOE_NODE_TYPE))
          /* Use this PPPoE node ! */
          snprintf(ngc.path, sizeof ngc.path, "[%x]:", nlink->nodeinfo.id);
        else {
          log_Printf(LogWARN, "%s Node type ``%s'' is currently active\n",
                     path, nlink->nodeinfo.type);
          return ether_Abandon(dev, p);
        }
        break;
      }
    }

    if (f == ninfo->hooks) {
      /*
       * Create a new ``PPPoE'' node connected to the ``ether'' node using
       * the ``orphan'' and ``ethernet'' hooks
       */
      snprintf(mkp.type, sizeof mkp.type, "%s", NG_PPPOE_NODE_TYPE);
      snprintf(mkp.ourhook, sizeof mkp.ourhook, "%s", NG_ETHER_HOOK_ORPHAN);
      snprintf(mkp.peerhook, sizeof mkp.peerhook, "%s", NG_PPPOE_HOOK_ETHERNET);
      snprintf(etherid, sizeof etherid, "[%x]:", ninfo->id);

      log_Printf(LogDEBUG, "Creating PPPoE netgraph node %s%s -> %s\n",
                 etherid, mkp.ourhook, mkp.peerhook);

      if (NgSendMsg(dev->cs, etherid, NGM_GENERIC_COOKIE,
                    NGM_MKPEER, &mkp, sizeof mkp) < 0) {
        log_Printf(LogWARN, "%s Cannot create PPPoE netgraph node: %s\n",
                   etherid, strerror(errno));
        return ether_Abandon(dev, p);
      }

      snprintf(ngc.path, sizeof ngc.path, "%s%s", path, NG_ETHER_HOOK_ORPHAN);
    }

    snprintf(dev->hook, sizeof dev->hook, "%s%d",
             TUN_NAME, p->dl->bundle->unit);

    /*
     * Connect the PPPoE node to our socket node.
     * ngc.path has already been set up
     */
    snprintf(ngc.ourhook, sizeof ngc.ourhook, "%s", dev->hook);
    memcpy(ngc.peerhook, ngc.ourhook, sizeof ngc.peerhook);

    log_Printf(LogDEBUG, "Connecting netgraph socket .:%s -> %s:%s\n",
               ngc.ourhook, ngc.path, ngc.peerhook);
    if (NgSendMsg(dev->cs, ".:", NGM_GENERIC_COOKIE,
                  NGM_CONNECT, &ngc, sizeof ngc) < 0) {
      log_Printf(LogWARN, "Cannot connect PPPoE and socket netgraph "
                 "nodes: %s\n", strerror(errno));
      return ether_Abandon(dev, p);
    }

    /* Bring the Ethernet interface up */
    path[ifacelen] = '\0';	/* Remove the trailing ':' */
    if (!iface_SetFlags(path, IFF_UP))
      log_Printf(LogWARN, "%s: Failed to set the IFF_UP flag on %s\n",
                 p->link.name, path);

    /* And finally, request a connection to the given provider */

    data = (struct ngpppoe_init_data *)alloca(sizeof *data + providerlen);
    snprintf(data->hook, sizeof data->hook, "%s", dev->hook);
    memcpy(data->data, provider, providerlen);
    data->data_len = providerlen;

    snprintf(connectpath, sizeof connectpath, ".:%s", dev->hook);
    log_Printf(LogDEBUG, "Sending PPPOE_CONNECT to %s\n", connectpath);
    if (NgSendMsg(dev->cs, connectpath, NGM_PPPOE_COOKIE,
                  NGM_PPPOE_CONNECT, data, sizeof *data + providerlen) == -1) {
      log_Printf(LogWARN, "``%s'': Cannot start netgraph node: %s\n",
                 connectpath, strerror(errno));
      return ether_Abandon(dev, p);
    }

    /* Hook things up so that we monitor dev->cs */
    p->desc.UpdateSet = ether_UpdateSet;
    p->desc.IsSet = ether_IsSet;
    p->desc.Read = ether_DescriptorRead;

    memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);
    switch (p->cfg.cd.necessity) {
      case CD_VARIABLE:
        dev->dev.cd.delay = p->cfg.cd.delay;
        break;
      case CD_REQUIRED:
        dev->dev.cd = p->cfg.cd;
        break;
      case CD_NOTREQUIRED:
        log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n",
                   p->link.name, dev->dev.cd.delay);
      case CD_DEFAULT:
        break;
    }

    dev->timeout = dev->dev.cd.delay;
    dev->connected = CARRIER_PENDING;
    /* This will be overridden by our session id - if provided by netgraph */
    dev->slot = GetIfIndex(path);
  } else {
    /* See if we're a netgraph socket */
    struct stat st;

    if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
      struct sockaddr_storage ssock;
      struct sockaddr *sock = (struct sockaddr *)&ssock;
      int sz;

      sz = sizeof ssock;
      if (getsockname(p->fd, sock, &sz) == -1) {
        log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
        close(p->fd);
        p->fd = -1;
        return NULL;
      }

      if (sock->sa_family == AF_NETGRAPH) {
        /*
         * It's a netgraph node... We can't determine hook names etc, so we
         * stay pretty impartial....
         */
        log_Printf(LogPHASE, "%s: Link is a netgraph node\n", p->link.name);

        if ((dev = malloc(sizeof *dev)) == NULL) {
          log_Printf(LogWARN, "%s: Cannot allocate an ether device: %s\n",
                     p->link.name, strerror(errno));
          return NULL;
        }

        memcpy(&dev->dev, &baseetherdevice, sizeof dev->dev);
        dev->cs = -1;
        dev->timeout = 0;
        dev->connected = CARRIER_OK;
        *dev->hook = '\0';

        /*
         * If we're being envoked from pppoed(8), we may have a SESSIONID
         * set in the environment.  If so, use it as the slot
         */
        if ((sessionid = getenv("SESSIONID")) != NULL) {
          char *end;
          u_long slot;

          slot = strtoul(sessionid, &end, 16);
          dev->slot = end != sessionid && *end == '\0' ? slot : 0;
        } else
          dev->slot = 0;
      }
    }
  }

  if (dev) {
    physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
    return &dev->dev;
  }

  return NULL;
}
OpenPOWER on IntegriCloud