1/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
2/*
3 * Copyright (c) 1994, 1995, 1996, 1997, 1998
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the Computer Systems
17 * Engineering Group at Lawrence Berkeley Laboratory.
18 * 4. Neither the name of the University nor of the Laboratory may be used
19 * to endorse or promote products derived from this software without
20 * specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef lint
36static const char rcsid[] _U_ =
| 1/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
2/*
3 * Copyright (c) 1994, 1995, 1996, 1997, 1998
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the Computer Systems
17 * Engineering Group at Lawrence Berkeley Laboratory.
18 * 4. Neither the name of the University nor of the Laboratory may be used
19 * to endorse or promote products derived from this software without
20 * specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef lint
36static const char rcsid[] _U_ =
|
37 "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.66.2.1 2005/06/20 21:30:17 guy Exp $ (LBL)";
| 37 "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.66.2.6 2007/06/11 09:52:04 guy Exp $ (LBL)";
|
38#endif
39
40#ifdef HAVE_CONFIG_H
41#include "config.h"
42#endif
43
44#ifdef WIN32
45#include <pcap-stdinc.h>
46#else /* WIN32 */
47
48#include <sys/param.h>
49#ifndef MSDOS
50#include <sys/file.h>
51#endif
52#include <sys/ioctl.h>
53#include <sys/socket.h>
54#ifdef HAVE_SYS_SOCKIO_H
55#include <sys/sockio.h>
56#endif
57
58struct mbuf; /* Squelch compiler warnings on some platforms for */
59struct rtentry; /* declarations in <net/if.h> */
60#include <net/if.h>
61#include <netinet/in.h>
62#endif /* WIN32 */
63
64#include <ctype.h>
65#include <errno.h>
66#include <memory.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#if !defined(WIN32) && !defined(__BORLANDC__)
71#include <unistd.h>
72#endif /* !WIN32 && !__BORLANDC__ */
73#ifdef HAVE_LIMITS_H
74#include <limits.h>
75#else
76#define INT_MAX 2147483647
77#endif
78
79#include "pcap-int.h"
80
81#ifdef HAVE_OS_PROTO_H
82#include "os-proto.h"
83#endif
84
85/* Not all systems have IFF_LOOPBACK */
86#ifdef IFF_LOOPBACK
87#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK)
88#else
89#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \
90 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0'))
91#endif
92
93struct sockaddr *
94dup_sockaddr(struct sockaddr *sa, size_t sa_length)
95{
96 struct sockaddr *newsa;
97
98 if ((newsa = malloc(sa_length)) == NULL)
99 return (NULL);
100 return (memcpy(newsa, sa, sa_length));
101}
102
103static int
104get_instance(const char *name)
105{
106 const char *cp, *endcp;
107 int n;
108
109 if (strcmp(name, "any") == 0) {
110 /*
111 * Give the "any" device an artificially high instance
112 * number, so it shows up after all other non-loopback
113 * interfaces.
114 */
115 return INT_MAX;
116 }
117
118 endcp = name + strlen(name);
119 for (cp = name; cp < endcp && !isdigit((unsigned char)*cp); ++cp)
120 continue;
121
122 if (isdigit((unsigned char)*cp))
123 n = atoi(cp);
124 else
125 n = 0;
126 return (n);
127}
128
129int
130add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name,
131 u_int flags, const char *description, char *errbuf)
132{
133 pcap_t *p;
134 pcap_if_t *curdev, *prevdev, *nextdev;
135 int this_instance;
136
137 /*
| 38#endif
39
40#ifdef HAVE_CONFIG_H
41#include "config.h"
42#endif
43
44#ifdef WIN32
45#include <pcap-stdinc.h>
46#else /* WIN32 */
47
48#include <sys/param.h>
49#ifndef MSDOS
50#include <sys/file.h>
51#endif
52#include <sys/ioctl.h>
53#include <sys/socket.h>
54#ifdef HAVE_SYS_SOCKIO_H
55#include <sys/sockio.h>
56#endif
57
58struct mbuf; /* Squelch compiler warnings on some platforms for */
59struct rtentry; /* declarations in <net/if.h> */
60#include <net/if.h>
61#include <netinet/in.h>
62#endif /* WIN32 */
63
64#include <ctype.h>
65#include <errno.h>
66#include <memory.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#if !defined(WIN32) && !defined(__BORLANDC__)
71#include <unistd.h>
72#endif /* !WIN32 && !__BORLANDC__ */
73#ifdef HAVE_LIMITS_H
74#include <limits.h>
75#else
76#define INT_MAX 2147483647
77#endif
78
79#include "pcap-int.h"
80
81#ifdef HAVE_OS_PROTO_H
82#include "os-proto.h"
83#endif
84
85/* Not all systems have IFF_LOOPBACK */
86#ifdef IFF_LOOPBACK
87#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK)
88#else
89#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \
90 (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0'))
91#endif
92
93struct sockaddr *
94dup_sockaddr(struct sockaddr *sa, size_t sa_length)
95{
96 struct sockaddr *newsa;
97
98 if ((newsa = malloc(sa_length)) == NULL)
99 return (NULL);
100 return (memcpy(newsa, sa, sa_length));
101}
102
103static int
104get_instance(const char *name)
105{
106 const char *cp, *endcp;
107 int n;
108
109 if (strcmp(name, "any") == 0) {
110 /*
111 * Give the "any" device an artificially high instance
112 * number, so it shows up after all other non-loopback
113 * interfaces.
114 */
115 return INT_MAX;
116 }
117
118 endcp = name + strlen(name);
119 for (cp = name; cp < endcp && !isdigit((unsigned char)*cp); ++cp)
120 continue;
121
122 if (isdigit((unsigned char)*cp))
123 n = atoi(cp);
124 else
125 n = 0;
126 return (n);
127}
128
129int
130add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name,
131 u_int flags, const char *description, char *errbuf)
132{
133 pcap_t *p;
134 pcap_if_t *curdev, *prevdev, *nextdev;
135 int this_instance;
136
137 /*
|
138 * Can we open this interface for live capture?
139 *
140 * We do this check so that interfaces that ae supplied
141 * by the interface enumeration mechanism we're using
142 * but that don't support packet capture aren't included
143 * in the list. An example of this is loopback interfaces
144 * on Solaris; we don't just omit loopback interfaces
145 * becaue you *can* capture on loopback interfaces on some
146 * OSes.
147 */
148 p = pcap_open_live(name, 68, 0, 0, errbuf);
149 if (p == NULL) {
150 /*
151 * No. Don't bother including it.
152 * Don't treat this as an error, though.
153 */
154 *curdev_ret = NULL;
155 return (0);
156 }
157 pcap_close(p);
158
159 /*
| |
160 * Is there already an entry in the list for this interface?
161 */
162 for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) {
163 if (strcmp(name, curdev->name) == 0)
164 break; /* yes, we found it */
165 }
| 138 * Is there already an entry in the list for this interface?
139 */
140 for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) {
141 if (strcmp(name, curdev->name) == 0)
142 break; /* yes, we found it */
143 }
|
| 144
|
166 if (curdev == NULL) {
167 /*
168 * No, we didn't find it.
| 145 if (curdev == NULL) {
146 /*
147 * No, we didn't find it.
|
| 148 *
149 * Can we open this interface for live capture?
150 *
151 * We do this check so that interfaces that are
152 * supplied by the interface enumeration mechanism
153 * we're using but that don't support packet capture
154 * aren't included in the list. Loopback interfaces
155 * on Solaris are an example of this; we don't just
156 * omit loopback interfaces on all platforms because
157 * you *can* capture on loopback interfaces on some
158 * OSes.
159 *
160 * On OS X, we don't do this check if the device
161 * name begins with "wlt"; at least some versions
162 * of OS X offer monitor mode capturing by having
163 * a separate "monitor mode" device for each wireless
164 * adapter, rather than by implementing the ioctls
165 * that {Free,Net,Open,DragonFly}BSD provide.
166 * Opening that device puts the adapter into monitor
167 * mode, which, at least for some adapters, causes
168 * them to deassociate from the network with which
169 * they're associated.
170 *
171 * Instead, we try to open the corresponding "en"
172 * device (so that we don't end up with, for users
173 * without sufficient privilege to open capture
174 * devices, a list of adapters that only includes
175 * the wlt devices).
176 */
177#ifdef __APPLE__
178 if (strncmp(name, "wlt", 3) == 0) {
179 char *en_name;
180 size_t en_name_len;
181
182 /*
183 * Try to allocate a buffer for the "en"
184 * device's name.
185 */
186 en_name_len = strlen(name) - 1;
187 en_name = malloc(en_name_len + 1);
188 if (en_name == NULL) {
189 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
190 "malloc: %s", pcap_strerror(errno));
191 return (-1);
192 }
193 strcpy(en_name, "en");
194 strcat(en_name, name + 3);
195 p = pcap_open_live(en_name, 68, 0, 0, errbuf);
196 free(en_name);
197 } else
198#endif /* __APPLE */
199 p = pcap_open_live(name, 68, 0, 0, errbuf);
200 if (p == NULL) {
201 /*
202 * No. Don't bother including it.
203 * Don't treat this as an error, though.
204 */
205 *curdev_ret = NULL;
206 return (0);
207 }
208 pcap_close(p);
209
210 /*
211 * Yes, we can open it.
|
169 * Allocate a new entry.
170 */
171 curdev = malloc(sizeof(pcap_if_t));
172 if (curdev == NULL) {
173 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
174 "malloc: %s", pcap_strerror(errno));
175 return (-1);
176 }
177
178 /*
179 * Fill in the entry.
180 */
181 curdev->next = NULL;
| 212 * Allocate a new entry.
213 */
214 curdev = malloc(sizeof(pcap_if_t));
215 if (curdev == NULL) {
216 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
217 "malloc: %s", pcap_strerror(errno));
218 return (-1);
219 }
220
221 /*
222 * Fill in the entry.
223 */
224 curdev->next = NULL;
|
182 curdev->name = malloc(strlen(name) + 1);
183 strcpy(curdev->name, name);
| 225 curdev->name = strdup(name);
226 if (curdev->name == NULL) {
227 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
228 "malloc: %s", pcap_strerror(errno));
229 free(curdev);
230 return (-1);
231 }
|
184 if (description != NULL) {
185 /*
186 * We have a description for this interface.
187 */
| 232 if (description != NULL) {
233 /*
234 * We have a description for this interface.
235 */
|
188 curdev->description = malloc(strlen(description) + 1);
189 strcpy(curdev->description, description);
| 236 curdev->description = strdup(description);
237 if (curdev->description == NULL) {
238 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
239 "malloc: %s", pcap_strerror(errno));
240 free(curdev->name);
241 free(curdev);
242 return (-1);
243 }
|
190 } else {
191 /*
192 * We don't.
193 */
194 curdev->description = NULL;
195 }
196 curdev->addresses = NULL; /* list starts out as empty */
197 curdev->flags = 0;
198 if (ISLOOPBACK(name, flags))
199 curdev->flags |= PCAP_IF_LOOPBACK;
200
201 /*
202 * Add it to the list, in the appropriate location.
203 * First, get the instance number of this interface.
204 */
205 this_instance = get_instance(name);
206
207 /*
208 * Now look for the last interface with an instance number
209 * less than or equal to the new interface's instance
210 * number - except that non-loopback interfaces are
211 * arbitrarily treated as having interface numbers less
212 * than those of loopback interfaces, so the loopback
213 * interfaces are put at the end of the list.
214 *
215 * We start with "prevdev" being NULL, meaning we're before
216 * the first element in the list.
217 */
218 prevdev = NULL;
219 for (;;) {
220 /*
221 * Get the interface after this one.
222 */
223 if (prevdev == NULL) {
224 /*
225 * The next element is the first element.
226 */
227 nextdev = *alldevs;
228 } else
229 nextdev = prevdev->next;
230
231 /*
232 * Are we at the end of the list?
233 */
234 if (nextdev == NULL) {
235 /*
236 * Yes - we have to put the new entry
237 * after "prevdev".
238 */
239 break;
240 }
241
242 /*
243 * Is the new interface a non-loopback interface
244 * and the next interface a loopback interface?
245 */
246 if (!(curdev->flags & PCAP_IF_LOOPBACK) &&
247 (nextdev->flags & PCAP_IF_LOOPBACK)) {
248 /*
249 * Yes, we should put the new entry
250 * before "nextdev", i.e. after "prevdev".
251 */
252 break;
253 }
254
255 /*
256 * Is the new interface's instance number less
257 * than the next interface's instance number,
258 * and is it the case that the new interface is a
259 * non-loopback interface or the next interface is
260 * a loopback interface?
261 *
262 * (The goal of both loopback tests is to make
263 * sure that we never put a loopback interface
264 * before any non-loopback interface and that we
265 * always put a non-loopback interface before all
266 * loopback interfaces.)
267 */
268 if (this_instance < get_instance(nextdev->name) &&
269 (!(curdev->flags & PCAP_IF_LOOPBACK) ||
270 (nextdev->flags & PCAP_IF_LOOPBACK))) {
271 /*
272 * Yes - we should put the new entry
273 * before "nextdev", i.e. after "prevdev".
274 */
275 break;
276 }
277
278 prevdev = nextdev;
279 }
280
281 /*
282 * Insert before "nextdev".
283 */
284 curdev->next = nextdev;
285
286 /*
287 * Insert after "prevdev" - unless "prevdev" is null,
288 * in which case this is the first interface.
289 */
290 if (prevdev == NULL) {
291 /*
292 * This is the first interface. Pass back a
293 * pointer to it, and put "curdev" before
294 * "nextdev".
295 */
296 *alldevs = curdev;
297 } else
298 prevdev->next = curdev;
299 }
300
301 *curdev_ret = curdev;
302 return (0);
303}
304
305int
306add_addr_to_iflist(pcap_if_t **alldevs, const char *name, u_int flags,
307 struct sockaddr *addr, size_t addr_size,
308 struct sockaddr *netmask, size_t netmask_size,
309 struct sockaddr *broadaddr, size_t broadaddr_size,
310 struct sockaddr *dstaddr, size_t dstaddr_size,
311 char *errbuf)
312{
313 pcap_if_t *curdev;
314 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
315
316 if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) {
317 /*
318 * Error - give up.
319 */
320 return (-1);
321 }
322 if (curdev == NULL) {
323 /*
324 * Device wasn't added because it can't be opened.
325 * Not a fatal error.
326 */
327 return (0);
328 }
329
330 /*
331 * "curdev" is an entry for this interface; add an entry for this
332 * address to its list of addresses.
333 *
334 * Allocate the new entry and fill it in.
335 */
336 curaddr = malloc(sizeof(pcap_addr_t));
337 if (curaddr == NULL) {
338 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
339 "malloc: %s", pcap_strerror(errno));
340 return (-1);
341 }
342
343 curaddr->next = NULL;
344 if (addr != NULL) {
345 curaddr->addr = dup_sockaddr(addr, addr_size);
346 if (curaddr->addr == NULL) {
347 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
348 "malloc: %s", pcap_strerror(errno));
349 free(curaddr);
350 return (-1);
351 }
352 } else
353 curaddr->addr = NULL;
354
355 if (netmask != NULL) {
356 curaddr->netmask = dup_sockaddr(netmask, netmask_size);
357 if (curaddr->netmask == NULL) {
358 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
359 "malloc: %s", pcap_strerror(errno));
| 244 } else {
245 /*
246 * We don't.
247 */
248 curdev->description = NULL;
249 }
250 curdev->addresses = NULL; /* list starts out as empty */
251 curdev->flags = 0;
252 if (ISLOOPBACK(name, flags))
253 curdev->flags |= PCAP_IF_LOOPBACK;
254
255 /*
256 * Add it to the list, in the appropriate location.
257 * First, get the instance number of this interface.
258 */
259 this_instance = get_instance(name);
260
261 /*
262 * Now look for the last interface with an instance number
263 * less than or equal to the new interface's instance
264 * number - except that non-loopback interfaces are
265 * arbitrarily treated as having interface numbers less
266 * than those of loopback interfaces, so the loopback
267 * interfaces are put at the end of the list.
268 *
269 * We start with "prevdev" being NULL, meaning we're before
270 * the first element in the list.
271 */
272 prevdev = NULL;
273 for (;;) {
274 /*
275 * Get the interface after this one.
276 */
277 if (prevdev == NULL) {
278 /*
279 * The next element is the first element.
280 */
281 nextdev = *alldevs;
282 } else
283 nextdev = prevdev->next;
284
285 /*
286 * Are we at the end of the list?
287 */
288 if (nextdev == NULL) {
289 /*
290 * Yes - we have to put the new entry
291 * after "prevdev".
292 */
293 break;
294 }
295
296 /*
297 * Is the new interface a non-loopback interface
298 * and the next interface a loopback interface?
299 */
300 if (!(curdev->flags & PCAP_IF_LOOPBACK) &&
301 (nextdev->flags & PCAP_IF_LOOPBACK)) {
302 /*
303 * Yes, we should put the new entry
304 * before "nextdev", i.e. after "prevdev".
305 */
306 break;
307 }
308
309 /*
310 * Is the new interface's instance number less
311 * than the next interface's instance number,
312 * and is it the case that the new interface is a
313 * non-loopback interface or the next interface is
314 * a loopback interface?
315 *
316 * (The goal of both loopback tests is to make
317 * sure that we never put a loopback interface
318 * before any non-loopback interface and that we
319 * always put a non-loopback interface before all
320 * loopback interfaces.)
321 */
322 if (this_instance < get_instance(nextdev->name) &&
323 (!(curdev->flags & PCAP_IF_LOOPBACK) ||
324 (nextdev->flags & PCAP_IF_LOOPBACK))) {
325 /*
326 * Yes - we should put the new entry
327 * before "nextdev", i.e. after "prevdev".
328 */
329 break;
330 }
331
332 prevdev = nextdev;
333 }
334
335 /*
336 * Insert before "nextdev".
337 */
338 curdev->next = nextdev;
339
340 /*
341 * Insert after "prevdev" - unless "prevdev" is null,
342 * in which case this is the first interface.
343 */
344 if (prevdev == NULL) {
345 /*
346 * This is the first interface. Pass back a
347 * pointer to it, and put "curdev" before
348 * "nextdev".
349 */
350 *alldevs = curdev;
351 } else
352 prevdev->next = curdev;
353 }
354
355 *curdev_ret = curdev;
356 return (0);
357}
358
359int
360add_addr_to_iflist(pcap_if_t **alldevs, const char *name, u_int flags,
361 struct sockaddr *addr, size_t addr_size,
362 struct sockaddr *netmask, size_t netmask_size,
363 struct sockaddr *broadaddr, size_t broadaddr_size,
364 struct sockaddr *dstaddr, size_t dstaddr_size,
365 char *errbuf)
366{
367 pcap_if_t *curdev;
368 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
369
370 if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) {
371 /*
372 * Error - give up.
373 */
374 return (-1);
375 }
376 if (curdev == NULL) {
377 /*
378 * Device wasn't added because it can't be opened.
379 * Not a fatal error.
380 */
381 return (0);
382 }
383
384 /*
385 * "curdev" is an entry for this interface; add an entry for this
386 * address to its list of addresses.
387 *
388 * Allocate the new entry and fill it in.
389 */
390 curaddr = malloc(sizeof(pcap_addr_t));
391 if (curaddr == NULL) {
392 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
393 "malloc: %s", pcap_strerror(errno));
394 return (-1);
395 }
396
397 curaddr->next = NULL;
398 if (addr != NULL) {
399 curaddr->addr = dup_sockaddr(addr, addr_size);
400 if (curaddr->addr == NULL) {
401 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
402 "malloc: %s", pcap_strerror(errno));
403 free(curaddr);
404 return (-1);
405 }
406 } else
407 curaddr->addr = NULL;
408
409 if (netmask != NULL) {
410 curaddr->netmask = dup_sockaddr(netmask, netmask_size);
411 if (curaddr->netmask == NULL) {
412 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
413 "malloc: %s", pcap_strerror(errno));
|
| 414 if (curaddr->addr != NULL)
415 free(curaddr->addr);
|
360 free(curaddr);
361 return (-1);
362 }
363 } else
364 curaddr->netmask = NULL;
365
366 if (broadaddr != NULL) {
367 curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size);
368 if (curaddr->broadaddr == NULL) {
369 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
370 "malloc: %s", pcap_strerror(errno));
| 416 free(curaddr);
417 return (-1);
418 }
419 } else
420 curaddr->netmask = NULL;
421
422 if (broadaddr != NULL) {
423 curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size);
424 if (curaddr->broadaddr == NULL) {
425 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
426 "malloc: %s", pcap_strerror(errno));
|
| 427 if (curaddr->netmask != NULL)
428 free(curaddr->netmask);
429 if (curaddr->addr != NULL)
430 free(curaddr->addr);
|
371 free(curaddr);
372 return (-1);
373 }
374 } else
375 curaddr->broadaddr = NULL;
376
377 if (dstaddr != NULL) {
378 curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size);
379 if (curaddr->dstaddr == NULL) {
380 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
381 "malloc: %s", pcap_strerror(errno));
| 431 free(curaddr);
432 return (-1);
433 }
434 } else
435 curaddr->broadaddr = NULL;
436
437 if (dstaddr != NULL) {
438 curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size);
439 if (curaddr->dstaddr == NULL) {
440 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
441 "malloc: %s", pcap_strerror(errno));
|
| 442 if (curaddr->broadaddr != NULL)
443 free(curaddr->broadaddr);
444 if (curaddr->netmask != NULL)
445 free(curaddr->netmask);
446 if (curaddr->addr != NULL)
447 free(curaddr->addr);
|
382 free(curaddr);
383 return (-1);
384 }
385 } else
386 curaddr->dstaddr = NULL;
387
388 /*
389 * Find the end of the list of addresses.
390 */
391 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
392 nextaddr = prevaddr->next;
393 if (nextaddr == NULL) {
394 /*
395 * This is the end of the list.
396 */
397 break;
398 }
399 }
400
401 if (prevaddr == NULL) {
402 /*
403 * The list was empty; this is the first member.
404 */
405 curdev->addresses = curaddr;
406 } else {
407 /*
408 * "prevaddr" is the last member of the list; append
409 * this member to it.
410 */
411 prevaddr->next = curaddr;
412 }
413
414 return (0);
415}
416
417int
418pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags,
419 const char *description, char *errbuf)
420{
421 pcap_if_t *curdev;
422
423 return (add_or_find_if(&curdev, devlist, name, flags, description,
424 errbuf));
425}
426
427
428/*
429 * Free a list of interfaces.
430 */
431void
432pcap_freealldevs(pcap_if_t *alldevs)
433{
434 pcap_if_t *curdev, *nextdev;
435 pcap_addr_t *curaddr, *nextaddr;
436
437 for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
438 nextdev = curdev->next;
439
440 /*
441 * Free all addresses.
442 */
443 for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) {
444 nextaddr = curaddr->next;
445 if (curaddr->addr)
446 free(curaddr->addr);
447 if (curaddr->netmask)
448 free(curaddr->netmask);
449 if (curaddr->broadaddr)
450 free(curaddr->broadaddr);
451 if (curaddr->dstaddr)
452 free(curaddr->dstaddr);
453 free(curaddr);
454 }
455
456 /*
457 * Free the name string.
458 */
459 free(curdev->name);
460
461 /*
462 * Free the description string, if any.
463 */
464 if (curdev->description != NULL)
465 free(curdev->description);
466
467 /*
468 * Free the interface.
469 */
470 free(curdev);
471 }
472}
473
474#if !defined(WIN32) && !defined(MSDOS)
475
476/*
477 * Return the name of a network interface attached to the system, or NULL
478 * if none can be found. The interface must be configured up; the
479 * lowest unit number is preferred; loopback is ignored.
480 */
481char *
482pcap_lookupdev(errbuf)
483 register char *errbuf;
484{
485 pcap_if_t *alldevs;
486/* for old BSD systems, including bsdi3 */
487#ifndef IF_NAMESIZE
488#define IF_NAMESIZE IFNAMSIZ
489#endif
490 static char device[IF_NAMESIZE + 1];
491 char *ret;
492
493 if (pcap_findalldevs(&alldevs, errbuf) == -1)
494 return (NULL);
495
496 if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) {
497 /*
498 * There are no devices on the list, or the first device
499 * on the list is a loopback device, which means there
500 * are no non-loopback devices on the list. This means
501 * we can't return any device.
502 *
503 * XXX - why not return a loopback device? If we can't
504 * capture on it, it won't be on the list, and if it's
505 * on the list, there aren't any non-loopback devices,
506 * so why not just supply it as the default device?
507 */
508 (void)strlcpy(errbuf, "no suitable device found",
509 PCAP_ERRBUF_SIZE);
510 ret = NULL;
511 } else {
512 /*
513 * Return the name of the first device on the list.
514 */
515 (void)strlcpy(device, alldevs->name, sizeof(device));
516 ret = device;
517 }
518
519 pcap_freealldevs(alldevs);
520 return (ret);
521}
522
523int
524pcap_lookupnet(device, netp, maskp, errbuf)
525 register const char *device;
526 register bpf_u_int32 *netp, *maskp;
527 register char *errbuf;
528{
529 register int fd;
| 448 free(curaddr);
449 return (-1);
450 }
451 } else
452 curaddr->dstaddr = NULL;
453
454 /*
455 * Find the end of the list of addresses.
456 */
457 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
458 nextaddr = prevaddr->next;
459 if (nextaddr == NULL) {
460 /*
461 * This is the end of the list.
462 */
463 break;
464 }
465 }
466
467 if (prevaddr == NULL) {
468 /*
469 * The list was empty; this is the first member.
470 */
471 curdev->addresses = curaddr;
472 } else {
473 /*
474 * "prevaddr" is the last member of the list; append
475 * this member to it.
476 */
477 prevaddr->next = curaddr;
478 }
479
480 return (0);
481}
482
483int
484pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags,
485 const char *description, char *errbuf)
486{
487 pcap_if_t *curdev;
488
489 return (add_or_find_if(&curdev, devlist, name, flags, description,
490 errbuf));
491}
492
493
494/*
495 * Free a list of interfaces.
496 */
497void
498pcap_freealldevs(pcap_if_t *alldevs)
499{
500 pcap_if_t *curdev, *nextdev;
501 pcap_addr_t *curaddr, *nextaddr;
502
503 for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
504 nextdev = curdev->next;
505
506 /*
507 * Free all addresses.
508 */
509 for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) {
510 nextaddr = curaddr->next;
511 if (curaddr->addr)
512 free(curaddr->addr);
513 if (curaddr->netmask)
514 free(curaddr->netmask);
515 if (curaddr->broadaddr)
516 free(curaddr->broadaddr);
517 if (curaddr->dstaddr)
518 free(curaddr->dstaddr);
519 free(curaddr);
520 }
521
522 /*
523 * Free the name string.
524 */
525 free(curdev->name);
526
527 /*
528 * Free the description string, if any.
529 */
530 if (curdev->description != NULL)
531 free(curdev->description);
532
533 /*
534 * Free the interface.
535 */
536 free(curdev);
537 }
538}
539
540#if !defined(WIN32) && !defined(MSDOS)
541
542/*
543 * Return the name of a network interface attached to the system, or NULL
544 * if none can be found. The interface must be configured up; the
545 * lowest unit number is preferred; loopback is ignored.
546 */
547char *
548pcap_lookupdev(errbuf)
549 register char *errbuf;
550{
551 pcap_if_t *alldevs;
552/* for old BSD systems, including bsdi3 */
553#ifndef IF_NAMESIZE
554#define IF_NAMESIZE IFNAMSIZ
555#endif
556 static char device[IF_NAMESIZE + 1];
557 char *ret;
558
559 if (pcap_findalldevs(&alldevs, errbuf) == -1)
560 return (NULL);
561
562 if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) {
563 /*
564 * There are no devices on the list, or the first device
565 * on the list is a loopback device, which means there
566 * are no non-loopback devices on the list. This means
567 * we can't return any device.
568 *
569 * XXX - why not return a loopback device? If we can't
570 * capture on it, it won't be on the list, and if it's
571 * on the list, there aren't any non-loopback devices,
572 * so why not just supply it as the default device?
573 */
574 (void)strlcpy(errbuf, "no suitable device found",
575 PCAP_ERRBUF_SIZE);
576 ret = NULL;
577 } else {
578 /*
579 * Return the name of the first device on the list.
580 */
581 (void)strlcpy(device, alldevs->name, sizeof(device));
582 ret = device;
583 }
584
585 pcap_freealldevs(alldevs);
586 return (ret);
587}
588
589int
590pcap_lookupnet(device, netp, maskp, errbuf)
591 register const char *device;
592 register bpf_u_int32 *netp, *maskp;
593 register char *errbuf;
594{
595 register int fd;
|
530 register struct sockaddr_in *sin;
| 596 register struct sockaddr_in *sin4;
|
531 struct ifreq ifr;
532
533 /*
534 * The pseudo-device "any" listens on all interfaces and therefore
535 * has the network address and -mask "0.0.0.0" therefore catching
536 * all traffic. Using NULL for the interface is the same as "any".
537 */
538 if (!device || strcmp(device, "any") == 0
539#ifdef HAVE_DAG_API
540 || strstr(device, "dag") != NULL
541#endif
542#ifdef HAVE_SEPTEL_API
543 || strstr(device, "septel") != NULL
544#endif
545 ) {
546 *netp = *maskp = 0;
547 return 0;
548 }
549
550 fd = socket(AF_INET, SOCK_DGRAM, 0);
551 if (fd < 0) {
552 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
553 pcap_strerror(errno));
554 return (-1);
555 }
556 memset(&ifr, 0, sizeof(ifr));
557#ifdef linux
558 /* XXX Work around Linux kernel bug */
559 ifr.ifr_addr.sa_family = AF_INET;
560#endif
561 (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
562 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
563 if (errno == EADDRNOTAVAIL) {
564 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
565 "%s: no IPv4 address assigned", device);
566 } else {
567 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
568 "SIOCGIFADDR: %s: %s",
569 device, pcap_strerror(errno));
570 }
571 (void)close(fd);
572 return (-1);
573 }
| 597 struct ifreq ifr;
598
599 /*
600 * The pseudo-device "any" listens on all interfaces and therefore
601 * has the network address and -mask "0.0.0.0" therefore catching
602 * all traffic. Using NULL for the interface is the same as "any".
603 */
604 if (!device || strcmp(device, "any") == 0
605#ifdef HAVE_DAG_API
606 || strstr(device, "dag") != NULL
607#endif
608#ifdef HAVE_SEPTEL_API
609 || strstr(device, "septel") != NULL
610#endif
611 ) {
612 *netp = *maskp = 0;
613 return 0;
614 }
615
616 fd = socket(AF_INET, SOCK_DGRAM, 0);
617 if (fd < 0) {
618 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
619 pcap_strerror(errno));
620 return (-1);
621 }
622 memset(&ifr, 0, sizeof(ifr));
623#ifdef linux
624 /* XXX Work around Linux kernel bug */
625 ifr.ifr_addr.sa_family = AF_INET;
626#endif
627 (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
628 if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
629 if (errno == EADDRNOTAVAIL) {
630 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
631 "%s: no IPv4 address assigned", device);
632 } else {
633 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
634 "SIOCGIFADDR: %s: %s",
635 device, pcap_strerror(errno));
636 }
637 (void)close(fd);
638 return (-1);
639 }
|
574 sin = (struct sockaddr_in *)&ifr.ifr_addr;
575 *netp = sin->sin_addr.s_addr;
| 640 sin4 = (struct sockaddr_in *)&ifr.ifr_addr;
641 *netp = sin4->sin_addr.s_addr;
|
576 if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
577 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
578 "SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno));
579 (void)close(fd);
580 return (-1);
581 }
582 (void)close(fd);
| 642 if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
643 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
644 "SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno));
645 (void)close(fd);
646 return (-1);
647 }
648 (void)close(fd);
|
583 *maskp = sin->sin_addr.s_addr;
| 649 *maskp = sin4->sin_addr.s_addr;
|
584 if (*maskp == 0) {
585 if (IN_CLASSA(*netp))
586 *maskp = IN_CLASSA_NET;
587 else if (IN_CLASSB(*netp))
588 *maskp = IN_CLASSB_NET;
589 else if (IN_CLASSC(*netp))
590 *maskp = IN_CLASSC_NET;
591 else {
592 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
593 "inet class for 0x%x unknown", *netp);
594 return (-1);
595 }
596 }
597 *netp &= *maskp;
598 return (0);
599}
600
601#elif defined(WIN32)
602
603/*
604 * Return the name of a network interface attached to the system, or NULL
605 * if none can be found. The interface must be configured up; the
606 * lowest unit number is preferred; loopback is ignored.
607 */
608char *
609pcap_lookupdev(errbuf)
610 register char *errbuf;
611{
612 DWORD dwVersion;
613 DWORD dwWindowsMajorVersion;
614 dwVersion = GetVersion(); /* get the OS version */
615 dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
616
617 if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) {
618 /*
619 * Windows 95, 98, ME.
620 */
621 ULONG NameLength = 8192;
622 static char AdaptersName[8192];
623
624 if (PacketGetAdapterNames(AdaptersName,&NameLength) )
625 return (AdaptersName);
626 else
627 return NULL;
628 } else {
629 /*
630 * Windows NT (NT 4.0, W2K, WXP). Convert the names to UNICODE for backward compatibility
631 */
632 ULONG NameLength = 8192;
633 static WCHAR AdaptersName[8192];
634 char *tAstr;
635 WCHAR *tUstr;
636 WCHAR *TAdaptersName = (WCHAR*)malloc(8192 * sizeof(WCHAR));
637 int NAdapts = 0;
638
639 if(TAdaptersName == NULL)
640 {
641 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
642 return NULL;
643 }
644
645 if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) )
646 {
647 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
648 "PacketGetAdapterNames: %s",
649 pcap_win32strerror());
650 free(TAdaptersName);
651 return NULL;
652 }
653
654
655 tAstr = (char*)TAdaptersName;
656 tUstr = (WCHAR*)AdaptersName;
657
658 /*
659 * Convert and copy the device names
660 */
661 while(sscanf(tAstr, "%S", tUstr) > 0)
662 {
663 tAstr += strlen(tAstr) + 1;
664 tUstr += wcslen(tUstr) + 1;
665 NAdapts ++;
666 }
667
668 tAstr++;
669 *tUstr = 0;
670 tUstr++;
671
672 /*
673 * Copy the descriptions
674 */
675 while(NAdapts--)
676 {
677 strcpy((char*)tUstr, tAstr);
678 (char*)tUstr += strlen(tAstr) + 1;;
679 tAstr += strlen(tAstr) + 1;
680 }
681
682 free(TAdaptersName);
683 return (char *)(AdaptersName);
684 }
685}
686
687
688int
689pcap_lookupnet(device, netp, maskp, errbuf)
690 register const char *device;
691 register bpf_u_int32 *netp, *maskp;
692 register char *errbuf;
693{
694 /*
695 * We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo()
696 * in order to skip non IPv4 (i.e. IPv6 addresses)
697 */
698 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
699 LONG if_addr_size = 1;
700 struct sockaddr_in *t_addr;
701 unsigned int i;
702
703 if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) {
704 *netp = *maskp = 0;
705 return (0);
706 }
707
708 for(i=0; i<MAX_NETWORK_ADDRESSES; i++)
709 {
710 if(if_addrs[i].IPAddress.ss_family == AF_INET)
711 {
712 t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress);
713 *netp = t_addr->sin_addr.S_un.S_addr;
714 t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask);
715 *maskp = t_addr->sin_addr.S_un.S_addr;
716
717 *netp &= *maskp;
718 return (0);
719 }
720
721 }
722
723 *netp = *maskp = 0;
724 return (0);
725}
726
727#endif /* !WIN32 && !MSDOS */
| 650 if (*maskp == 0) {
651 if (IN_CLASSA(*netp))
652 *maskp = IN_CLASSA_NET;
653 else if (IN_CLASSB(*netp))
654 *maskp = IN_CLASSB_NET;
655 else if (IN_CLASSC(*netp))
656 *maskp = IN_CLASSC_NET;
657 else {
658 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
659 "inet class for 0x%x unknown", *netp);
660 return (-1);
661 }
662 }
663 *netp &= *maskp;
664 return (0);
665}
666
667#elif defined(WIN32)
668
669/*
670 * Return the name of a network interface attached to the system, or NULL
671 * if none can be found. The interface must be configured up; the
672 * lowest unit number is preferred; loopback is ignored.
673 */
674char *
675pcap_lookupdev(errbuf)
676 register char *errbuf;
677{
678 DWORD dwVersion;
679 DWORD dwWindowsMajorVersion;
680 dwVersion = GetVersion(); /* get the OS version */
681 dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
682
683 if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) {
684 /*
685 * Windows 95, 98, ME.
686 */
687 ULONG NameLength = 8192;
688 static char AdaptersName[8192];
689
690 if (PacketGetAdapterNames(AdaptersName,&NameLength) )
691 return (AdaptersName);
692 else
693 return NULL;
694 } else {
695 /*
696 * Windows NT (NT 4.0, W2K, WXP). Convert the names to UNICODE for backward compatibility
697 */
698 ULONG NameLength = 8192;
699 static WCHAR AdaptersName[8192];
700 char *tAstr;
701 WCHAR *tUstr;
702 WCHAR *TAdaptersName = (WCHAR*)malloc(8192 * sizeof(WCHAR));
703 int NAdapts = 0;
704
705 if(TAdaptersName == NULL)
706 {
707 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
708 return NULL;
709 }
710
711 if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) )
712 {
713 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
714 "PacketGetAdapterNames: %s",
715 pcap_win32strerror());
716 free(TAdaptersName);
717 return NULL;
718 }
719
720
721 tAstr = (char*)TAdaptersName;
722 tUstr = (WCHAR*)AdaptersName;
723
724 /*
725 * Convert and copy the device names
726 */
727 while(sscanf(tAstr, "%S", tUstr) > 0)
728 {
729 tAstr += strlen(tAstr) + 1;
730 tUstr += wcslen(tUstr) + 1;
731 NAdapts ++;
732 }
733
734 tAstr++;
735 *tUstr = 0;
736 tUstr++;
737
738 /*
739 * Copy the descriptions
740 */
741 while(NAdapts--)
742 {
743 strcpy((char*)tUstr, tAstr);
744 (char*)tUstr += strlen(tAstr) + 1;;
745 tAstr += strlen(tAstr) + 1;
746 }
747
748 free(TAdaptersName);
749 return (char *)(AdaptersName);
750 }
751}
752
753
754int
755pcap_lookupnet(device, netp, maskp, errbuf)
756 register const char *device;
757 register bpf_u_int32 *netp, *maskp;
758 register char *errbuf;
759{
760 /*
761 * We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo()
762 * in order to skip non IPv4 (i.e. IPv6 addresses)
763 */
764 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
765 LONG if_addr_size = 1;
766 struct sockaddr_in *t_addr;
767 unsigned int i;
768
769 if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) {
770 *netp = *maskp = 0;
771 return (0);
772 }
773
774 for(i=0; i<MAX_NETWORK_ADDRESSES; i++)
775 {
776 if(if_addrs[i].IPAddress.ss_family == AF_INET)
777 {
778 t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress);
779 *netp = t_addr->sin_addr.S_un.S_addr;
780 t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask);
781 *maskp = t_addr->sin_addr.S_un.S_addr;
782
783 *netp &= *maskp;
784 return (0);
785 }
786
787 }
788
789 *netp = *maskp = 0;
790 return (0);
791}
792
793#endif /* !WIN32 && !MSDOS */
|