summaryrefslogtreecommitdiffstats
path: root/usr.sbin/ppp/atm.c
blob: 6d6aba9214f6d5f55823d8031acf3d80e3c410af (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
/*-
 * Copyright (c) 2000 Jakob Stoklund Olesen <stoklund@taxidriver.dk>
 * 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/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netnatm/natm.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/uio.h>
#include <termios.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 "atm.h"

/* String identifying PPPoA */
#define PPPOA		"PPPoA"
#define PPPOA_LEN	(sizeof(PPPOA) - 1)

struct atmdevice {
  struct device dev;		/* What struct physical knows about */
};

#define device2atm(d) ((d)->type == ATM_DEVICE ? (struct atmdevice *)d : NULL)

int
atm_DeviceSize(void)
{
  return sizeof(struct atmdevice);
}

static ssize_t
atm_Sendto(struct physical *p, const void *v, size_t n)
{
  ssize_t ret = write(p->fd, v, n);
  if (ret < 0) {
    log_Printf(LogDEBUG, "atm_Sendto(%ld): %s\n", (long)n, strerror(errno));
    return ret;
  }
  return ret;
}

static ssize_t
atm_Recvfrom(struct physical *p, void *v, size_t n)
{
    ssize_t ret = read(p->fd, (char*)v, n);
    if (ret < 0) {
      log_Printf(LogDEBUG, "atm_Recvfrom(%ld): %s\n", (long)n, strerror(errno));
      return ret;
    }
    return ret;
}

static void
atm_Free(struct physical *p)
{
  struct atmdevice *dev = device2atm(p->handler);

  free(dev);
}

static void
atm_device2iov(struct device *d, struct iovec *iov, int *niov,
               int maxiov, int *auxfd, int *nauxfd)
{
  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)++;
}

static const struct device baseatmdevice = {
  ATM_DEVICE,
  "atm",
  0,
  { CD_NOTREQUIRED, 0 },
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  NULL,
  atm_Free,
  atm_Recvfrom,
  atm_Sendto,
  atm_device2iov,
  NULL,
  NULL
};

struct device *
atm_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
               int maxiov, int *auxfd, int *nauxfd)
{
  if (type == ATM_DEVICE) {
    struct atmdevice *dev = (struct atmdevice *)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);
    }

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

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

  return NULL;
}

static struct atmdevice *
atm_CreateDevice(struct physical *p, const char *iface, unsigned vpi,
                 unsigned vci)
{
  struct atmdevice *dev;
  struct sockaddr_natm sock;
  
  if ((dev = calloc(1, sizeof *dev)) == NULL) {
    log_Printf(LogWARN, "%s: Cannot allocate an atm device: %s\n",
               p->link.name, strerror(errno));
    return NULL;
  }

  sock.snatm_len = sizeof sock;
  sock.snatm_family = AF_NATM;
  strncpy(sock.snatm_if, iface, IFNAMSIZ);
  sock.snatm_vpi = vpi;
  sock.snatm_vci = vci;

  log_Printf(LogPHASE, "%s: Connecting to %s:%u.%u\n", p->link.name,
             iface, vpi, vci);

  p->fd = socket(PF_NATM, SOCK_DGRAM, PROTO_NATMAAL5);
  if (p->fd >= 0) {
    log_Printf(LogDEBUG, "%s: Opened atm socket %s\n", p->link.name,
               p->name.full);
    if (connect(p->fd, (struct sockaddr *)&sock, sizeof sock) == 0)
      return dev;
    else
      log_Printf(LogWARN, "%s: connect: %s\n", p->name.full, strerror(errno));
  } else
    log_Printf(LogWARN, "%s: socket: %s\n", p->name.full, strerror(errno));

  close(p->fd);
  p->fd = -1;
  free(dev);

  return NULL;
}

struct device *
atm_Create(struct physical *p)
{
  struct atmdevice *dev;

  dev = NULL;
  if (p->fd < 0 && !strncasecmp(p->name.full, PPPOA, PPPOA_LEN)
      && p->name.full[PPPOA_LEN] == ':') {
    char iface[25];
    unsigned vci, vpi;
    
    if (sscanf(p->name.full + PPPOA_LEN + 1, "%25[A-Za-z0-9]:%u.%u", iface,
               &vpi, &vci) != 3) {
      log_Printf(LogWARN, "Malformed ATM device name \'%s\', "
                 "PPPoA:if:vpi.vci expected\n", p->name.full);
      return NULL;
    }
    
    dev = atm_CreateDevice(p, iface, vpi, vci);
  }

  if (dev) {
    memcpy(&dev->dev, &baseatmdevice, sizeof dev->dev);
    physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
    if (p->cfg.cd.necessity != CD_DEFAULT)
      log_Printf(LogWARN, "Carrier settings ignored\n");
    return &dev->dev;
  }

  return NULL;
}
OpenPOWER on IntegriCloud