1 /*-
2 * Copyright (c) 2000 Jakob Stoklund Olesen <stoklund@taxidriver.dk>
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: src/usr.sbin/ppp/atm.c,v 1.10.26.1 2010/12/21 17:10:29 kensmith Exp $
27 */
28
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <net/if.h>
32 #include <netnatm/natm.h>
33
34 #include <errno.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <sysexits.h>
39 #include <sys/uio.h>
40 #include <termios.h>
41 #include <unistd.h>
42
43 #include "layer.h"
44 #include "defs.h"
45 #include "mbuf.h"
46 #include "log.h"
47 #include "timer.h"
48 #include "lqr.h"
49 #include "hdlc.h"
50 #include "throughput.h"
51 #include "fsm.h"
52 #include "lcp.h"
53 #include "ccp.h"
54 #include "link.h"
55 #include "async.h"
56 #include "descriptor.h"
57 #include "physical.h"
58 #include "main.h"
59 #include "atm.h"
60
61 /* String identifying PPPoA */
62 #define PPPOA "PPPoA"
63 #define PPPOA_LEN (sizeof(PPPOA) - 1)
64
65 struct atmdevice {
66 struct device dev; /* What struct physical knows about */
67 };
68
69 #define device2atm(d) ((d)->type == ATM_DEVICE ? (struct atmdevice *)d : NULL)
70
71 unsigned
atm_DeviceSize(void)72 atm_DeviceSize(void)
73 {
74 return sizeof(struct atmdevice);
75 }
76
77 static ssize_t
atm_Sendto(struct physical * p,const void * v,size_t n)78 atm_Sendto(struct physical *p, const void *v, size_t n)
79 {
80 ssize_t ret = write(p->fd, v, n);
81 if (ret < 0) {
82 log_Printf(LogDEBUG, "atm_Sendto(%ld): %s\n", (long)n, strerror(errno));
83 return ret;
84 }
85 return ret;
86 }
87
88 static ssize_t
atm_Recvfrom(struct physical * p,void * v,size_t n)89 atm_Recvfrom(struct physical *p, void *v, size_t n)
90 {
91 ssize_t ret = read(p->fd, (char*)v, n);
92 if (ret < 0) {
93 log_Printf(LogDEBUG, "atm_Recvfrom(%ld): %s\n", (long)n, strerror(errno));
94 return ret;
95 }
96 return ret;
97 }
98
99 static void
atm_Free(struct physical * p)100 atm_Free(struct physical *p)
101 {
102 struct atmdevice *dev = device2atm(p->handler);
103
104 free(dev);
105 }
106
107 static void
atm_device2iov(struct device * d,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd __unused,int * nauxfd __unused)108 atm_device2iov(struct device *d, struct iovec *iov, int *niov,
109 int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
110 {
111 int sz = physical_MaxDeviceSize();
112
113 iov[*niov].iov_base = realloc(d, sz);
114 if (iov[*niov].iov_base == NULL) {
115 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
116 AbortProgram(EX_OSERR);
117 }
118 iov[*niov].iov_len = sz;
119 (*niov)++;
120 }
121
122 static const struct device baseatmdevice = {
123 ATM_DEVICE,
124 "atm",
125 0,
126 { CD_NOTREQUIRED, 0 },
127 NULL,
128 NULL,
129 NULL,
130 NULL,
131 NULL,
132 NULL,
133 NULL,
134 atm_Free,
135 atm_Recvfrom,
136 atm_Sendto,
137 atm_device2iov,
138 NULL,
139 NULL,
140 NULL
141 };
142
143 struct device *
atm_iov2device(int type,struct physical * p,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd __unused,int * nauxfd __unused)144 atm_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
145 int maxiov __unused, int *auxfd __unused, int *nauxfd __unused)
146 {
147 if (type == ATM_DEVICE) {
148 struct atmdevice *dev = (struct atmdevice *)iov[(*niov)++].iov_base;
149
150 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
151 if (dev == NULL) {
152 log_Printf(LogALERT, "Failed to allocate memory: %d\n",
153 (int)(sizeof *dev));
154 AbortProgram(EX_OSERR);
155 }
156
157 /* Refresh function pointers etc */
158 memcpy(&dev->dev, &baseatmdevice, sizeof dev->dev);
159
160 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
161 return &dev->dev;
162 }
163
164 return NULL;
165 }
166
167 static struct atmdevice *
atm_CreateDevice(struct physical * p,const char * iface,unsigned vpi,unsigned vci)168 atm_CreateDevice(struct physical *p, const char *iface, unsigned vpi,
169 unsigned vci)
170 {
171 struct atmdevice *dev;
172 struct sockaddr_natm sock;
173
174 if ((dev = calloc(1, sizeof *dev)) == NULL) {
175 log_Printf(LogWARN, "%s: Cannot allocate an atm device: %s\n",
176 p->link.name, strerror(errno));
177 return NULL;
178 }
179
180 sock.snatm_len = sizeof sock;
181 sock.snatm_family = AF_NATM;
182 strncpy(sock.snatm_if, iface, IFNAMSIZ);
183 sock.snatm_vpi = vpi;
184 sock.snatm_vci = vci;
185
186 log_Printf(LogPHASE, "%s: Connecting to %s:%u.%u\n", p->link.name,
187 iface, vpi, vci);
188
189 p->fd = socket(PF_NATM, SOCK_DGRAM, PROTO_NATMAAL5);
190 if (p->fd >= 0) {
191 log_Printf(LogDEBUG, "%s: Opened atm socket %s\n", p->link.name,
192 p->name.full);
193 if (connect(p->fd, (struct sockaddr *)&sock, sizeof sock) == 0)
194 return dev;
195 else
196 log_Printf(LogWARN, "%s: connect: %s\n", p->name.full, strerror(errno));
197 } else
198 log_Printf(LogWARN, "%s: socket: %s\n", p->name.full, strerror(errno));
199
200 close(p->fd);
201 p->fd = -1;
202 free(dev);
203
204 return NULL;
205 }
206
207 struct device *
atm_Create(struct physical * p)208 atm_Create(struct physical *p)
209 {
210 struct atmdevice *dev;
211
212 dev = NULL;
213 if (p->fd < 0 && !strncasecmp(p->name.full, PPPOA, PPPOA_LEN)
214 && p->name.full[PPPOA_LEN] == ':') {
215 char iface[25];
216 unsigned vci, vpi;
217
218 if (sscanf(p->name.full + PPPOA_LEN + 1, "%25[A-Za-z0-9]:%u.%u", iface,
219 &vpi, &vci) != 3) {
220 log_Printf(LogWARN, "Malformed ATM device name \'%s\', "
221 "PPPoA:if:vpi.vci expected\n", p->name.full);
222 return NULL;
223 }
224
225 dev = atm_CreateDevice(p, iface, vpi, vci);
226 }
227
228 if (dev) {
229 memcpy(&dev->dev, &baseatmdevice, sizeof dev->dev);
230 physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNCNOACF);
231 if (p->cfg.cd.necessity != CD_DEFAULT)
232 log_Printf(LogWARN, "Carrier settings ignored\n");
233 return &dev->dev;
234 }
235
236 return NULL;
237 }
238