1/*
| 1/*
|
2 * Copyright (c) 2002 - 2003
3 * NetGroup, Politecnico di Torino (Italy)
| 2 * Copyright (c) 2002 - 2005 NetGroup, Politecnico di Torino (Italy)
3 * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
|
4 * 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 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
| 4 * 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 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
|
15 * 3. Neither the name of the Politecnico di Torino nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
| 15 * 3. Neither the name of the Politecnico di Torino, CACE Technologies
16 * nor the names of its contributors may be used to endorse or promote
17 * products derived from this software without specific prior written
18 * permission.
|
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 */
32
33#ifndef lint
34static const char rcsid[] _U_ =
| 19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34#ifndef lint
35static const char rcsid[] _U_ =
|
35 "@(#) $Header: /tcpdump/master/libpcap/fad-win32.c,v 1.11.2.1 2005/09/01 22:07:41 risso Exp $ (LBL)";
| 36 "@(#) $Header: /tcpdump/master/libpcap/fad-win32.c,v 1.11.2.3 2006/02/22 17:09:32 gianluca Exp $ (LBL)";
|
36#endif
37
38#ifdef HAVE_CONFIG_H
39#include "config.h"
40#endif
41
42#include <pcap.h>
43#include <pcap-int.h>
| 37#endif
38
39#ifdef HAVE_CONFIG_H
40#include "config.h"
41#endif
42
43#include <pcap.h>
44#include <pcap-int.h>
|
44#include <packet32.h>
| 45#include <Packet32.h>
|
45
46#include <errno.h>
47
48/*
49 * Add an entry to the list of addresses for an interface.
50 * "curdev" is the entry for that interface.
51 */
52static int
53add_addr_to_list(pcap_if_t *curdev, struct sockaddr *addr,
54 struct sockaddr *netmask, struct sockaddr *broadaddr,
55 struct sockaddr *dstaddr, char *errbuf)
56{
57 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
58
59 /*
60 * Allocate the new entry and fill it in.
61 */
62 curaddr = (pcap_addr_t*)malloc(sizeof(pcap_addr_t));
63 if (curaddr == NULL) {
64 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
65 "malloc: %s", pcap_strerror(errno));
66 return (-1);
67 }
68
69 curaddr->next = NULL;
70 if (addr != NULL) {
71 curaddr->addr = (struct sockaddr*)dup_sockaddr(addr, sizeof(struct sockaddr_storage));
72 if (curaddr->addr == NULL) {
73 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
74 "malloc: %s", pcap_strerror(errno));
75 free(curaddr);
76 return (-1);
77 }
78 } else
79 curaddr->addr = NULL;
80
81 if (netmask != NULL) {
82 curaddr->netmask = (struct sockaddr*)dup_sockaddr(netmask, sizeof(struct sockaddr_storage));
83 if (curaddr->netmask == NULL) {
84 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
85 "malloc: %s", pcap_strerror(errno));
86 free(curaddr);
87 return (-1);
88 }
89 } else
90 curaddr->netmask = NULL;
91
92 if (broadaddr != NULL) {
93 curaddr->broadaddr = (struct sockaddr*)dup_sockaddr(broadaddr, sizeof(struct sockaddr_storage));
94 if (curaddr->broadaddr == NULL) {
95 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
96 "malloc: %s", pcap_strerror(errno));
97 free(curaddr);
98 return (-1);
99 }
100 } else
101 curaddr->broadaddr = NULL;
102
103 if (dstaddr != NULL) {
104 curaddr->dstaddr = (struct sockaddr*)dup_sockaddr(dstaddr, sizeof(struct sockaddr_storage));
105 if (curaddr->dstaddr == NULL) {
106 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
107 "malloc: %s", pcap_strerror(errno));
108 free(curaddr);
109 return (-1);
110 }
111 } else
112 curaddr->dstaddr = NULL;
113
114 /*
115 * Find the end of the list of addresses.
116 */
117 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
118 nextaddr = prevaddr->next;
119 if (nextaddr == NULL) {
120 /*
121 * This is the end of the list.
122 */
123 break;
124 }
125 }
126
127 if (prevaddr == NULL) {
128 /*
129 * The list was empty; this is the first member.
130 */
131 curdev->addresses = curaddr;
132 } else {
133 /*
134 * "prevaddr" is the last member of the list; append
135 * this member to it.
136 */
137 prevaddr->next = curaddr;
138 }
139
140 return (0);
141}
142
143
144static int
145pcap_add_if_win32(pcap_if_t **devlist, char *name, const char *desc,
146 char *errbuf)
147{
148 pcap_if_t *curdev;
149 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
150 LONG if_addr_size;
151 int res = 0;
152
153 if_addr_size = MAX_NETWORK_ADDRESSES;
154
155 /*
156 * Add an entry for this interface, with no addresses.
157 */
158 if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
159 /*
160 * Failure.
161 */
162 return (-1);
163 }
164
165 /*
166 * Get the list of addresses for the interface.
167 */
168 if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
169 /*
170 * Failure.
171 *
172 * We don't return an error, because this can happen with
173 * NdisWan interfaces, and we want to supply them even
174 * if we can't supply their addresses.
175 *
176 * We return an entry with an empty address list.
177 */
178 return (0);
179 }
180
181 /*
182 * Now add the addresses.
183 */
184 while (if_addr_size-- > 0) {
185 /*
186 * "curdev" is an entry for this interface; add an entry for
187 * this address to its list of addresses.
188 */
189 if(curdev == NULL)
190 break;
191 res = add_addr_to_list(curdev,
192 (struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
193 (struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
194 (struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
195 NULL,
196 errbuf);
197 if (res == -1) {
198 /*
199 * Failure.
200 */
201 break;
202 }
203 }
204
205 return (res);
206}
207
208
209/*
210 * Get a list of all interfaces that are up and that we can open.
211 * Returns -1 on error, 0 otherwise.
212 * The list, as returned through "alldevsp", may be null if no interfaces
213 * were up and could be opened.
214 *
215 * Win32 implementation, based on WinPcap
216 */
217int
218pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
219{
220 pcap_if_t *devlist = NULL;
221 int ret = 0;
222 const char *desc;
223 char *AdaptersName;
224 ULONG NameLength;
225 char *name;
226
| 46
47#include <errno.h>
48
49/*
50 * Add an entry to the list of addresses for an interface.
51 * "curdev" is the entry for that interface.
52 */
53static int
54add_addr_to_list(pcap_if_t *curdev, struct sockaddr *addr,
55 struct sockaddr *netmask, struct sockaddr *broadaddr,
56 struct sockaddr *dstaddr, char *errbuf)
57{
58 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
59
60 /*
61 * Allocate the new entry and fill it in.
62 */
63 curaddr = (pcap_addr_t*)malloc(sizeof(pcap_addr_t));
64 if (curaddr == NULL) {
65 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
66 "malloc: %s", pcap_strerror(errno));
67 return (-1);
68 }
69
70 curaddr->next = NULL;
71 if (addr != NULL) {
72 curaddr->addr = (struct sockaddr*)dup_sockaddr(addr, sizeof(struct sockaddr_storage));
73 if (curaddr->addr == NULL) {
74 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
75 "malloc: %s", pcap_strerror(errno));
76 free(curaddr);
77 return (-1);
78 }
79 } else
80 curaddr->addr = NULL;
81
82 if (netmask != NULL) {
83 curaddr->netmask = (struct sockaddr*)dup_sockaddr(netmask, sizeof(struct sockaddr_storage));
84 if (curaddr->netmask == NULL) {
85 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
86 "malloc: %s", pcap_strerror(errno));
87 free(curaddr);
88 return (-1);
89 }
90 } else
91 curaddr->netmask = NULL;
92
93 if (broadaddr != NULL) {
94 curaddr->broadaddr = (struct sockaddr*)dup_sockaddr(broadaddr, sizeof(struct sockaddr_storage));
95 if (curaddr->broadaddr == NULL) {
96 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
97 "malloc: %s", pcap_strerror(errno));
98 free(curaddr);
99 return (-1);
100 }
101 } else
102 curaddr->broadaddr = NULL;
103
104 if (dstaddr != NULL) {
105 curaddr->dstaddr = (struct sockaddr*)dup_sockaddr(dstaddr, sizeof(struct sockaddr_storage));
106 if (curaddr->dstaddr == NULL) {
107 (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
108 "malloc: %s", pcap_strerror(errno));
109 free(curaddr);
110 return (-1);
111 }
112 } else
113 curaddr->dstaddr = NULL;
114
115 /*
116 * Find the end of the list of addresses.
117 */
118 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
119 nextaddr = prevaddr->next;
120 if (nextaddr == NULL) {
121 /*
122 * This is the end of the list.
123 */
124 break;
125 }
126 }
127
128 if (prevaddr == NULL) {
129 /*
130 * The list was empty; this is the first member.
131 */
132 curdev->addresses = curaddr;
133 } else {
134 /*
135 * "prevaddr" is the last member of the list; append
136 * this member to it.
137 */
138 prevaddr->next = curaddr;
139 }
140
141 return (0);
142}
143
144
145static int
146pcap_add_if_win32(pcap_if_t **devlist, char *name, const char *desc,
147 char *errbuf)
148{
149 pcap_if_t *curdev;
150 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
151 LONG if_addr_size;
152 int res = 0;
153
154 if_addr_size = MAX_NETWORK_ADDRESSES;
155
156 /*
157 * Add an entry for this interface, with no addresses.
158 */
159 if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
160 /*
161 * Failure.
162 */
163 return (-1);
164 }
165
166 /*
167 * Get the list of addresses for the interface.
168 */
169 if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
170 /*
171 * Failure.
172 *
173 * We don't return an error, because this can happen with
174 * NdisWan interfaces, and we want to supply them even
175 * if we can't supply their addresses.
176 *
177 * We return an entry with an empty address list.
178 */
179 return (0);
180 }
181
182 /*
183 * Now add the addresses.
184 */
185 while (if_addr_size-- > 0) {
186 /*
187 * "curdev" is an entry for this interface; add an entry for
188 * this address to its list of addresses.
189 */
190 if(curdev == NULL)
191 break;
192 res = add_addr_to_list(curdev,
193 (struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
194 (struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
195 (struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
196 NULL,
197 errbuf);
198 if (res == -1) {
199 /*
200 * Failure.
201 */
202 break;
203 }
204 }
205
206 return (res);
207}
208
209
210/*
211 * Get a list of all interfaces that are up and that we can open.
212 * Returns -1 on error, 0 otherwise.
213 * The list, as returned through "alldevsp", may be null if no interfaces
214 * were up and could be opened.
215 *
216 * Win32 implementation, based on WinPcap
217 */
218int
219pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
220{
221 pcap_if_t *devlist = NULL;
222 int ret = 0;
223 const char *desc;
224 char *AdaptersName;
225 ULONG NameLength;
226 char *name;
227
|
227 if(!PacketGetAdapterNames(NULL, &NameLength) && NameLength == 0)
| 228 if (!PacketGetAdapterNames(NULL, &NameLength))
|
228 {
| 229 {
|
229 /*
230 * If PacketGetAdapterNames *and* sets the lenght of the buffer to zero,
231 * it means there was an error.
232 */
233 snprintf(errbuf, PCAP_ERRBUF_SIZE, "PacketGetAdapterNames failed: %s", pcap_win32strerror());
234 *alldevsp = NULL;
235 return -1;
| 230 DWORD last_error = GetLastError();
231
232 if (last_error != ERROR_INSUFFICIENT_BUFFER)
233 {
234 snprintf(errbuf, PCAP_ERRBUF_SIZE,
235 "PacketGetAdapterNames: %s",
236 pcap_win32strerror());
237 return (-1);
238 }
|
236 }
237
238 if (NameLength > 0)
239 AdaptersName = (char*) malloc(NameLength);
240 else
241 {
| 239 }
240
241 if (NameLength > 0)
242 AdaptersName = (char*) malloc(NameLength);
243 else
244 {
|
242 snprintf(errbuf, PCAP_ERRBUF_SIZE, "no adapters found.");
| |
243 *alldevsp = NULL;
244 return 0;
245 }
246 if (AdaptersName == NULL)
247 {
248 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
249 return (-1);
250 }
251
252 if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
253 snprintf(errbuf, PCAP_ERRBUF_SIZE,
254 "PacketGetAdapterNames: %s",
255 pcap_win32strerror());
256 free(AdaptersName);
257 return (-1);
258 }
259
260 /*
261 * "PacketGetAdapterNames()" returned a list of
262 * null-terminated ASCII interface name strings,
263 * terminated by a null string, followed by a list
264 * of null-terminated ASCII interface description
265 * strings, terminated by a null string.
266 * This means there are two ASCII nulls at the end
267 * of the first list.
268 *
269 * Find the end of the first list; that's the
270 * beginning of the second list.
271 */
272 desc = &AdaptersName[0];
273 while (*desc != '\0' || *(desc + 1) != '\0')
274 desc++;
275
276 /*
277 * Found it - "desc" points to the first of the two
278 * nulls at the end of the list of names, so the
279 * first byte of the list of descriptions is two bytes
280 * after it.
281 */
282 desc += 2;
283
284 /*
285 * Loop over the elements in the first list.
286 */
287 name = &AdaptersName[0];
288 while (*name != '\0') {
289 /*
290 * Add an entry for this interface.
291 */
292 if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
293 /*
294 * Failure.
295 */
296 ret = -1;
297 break;
298 }
299 name += strlen(name) + 1;
300 desc += strlen(desc) + 1;
301 }
302
303 if (ret == -1) {
304 /*
305 * We had an error; free the list we've been constructing.
306 */
307 if (devlist != NULL) {
308 pcap_freealldevs(devlist);
309 devlist = NULL;
310 }
311 }
312
313 *alldevsp = devlist;
314 free(AdaptersName);
315 return (ret);
316}
| 245 *alldevsp = NULL;
246 return 0;
247 }
248 if (AdaptersName == NULL)
249 {
250 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
251 return (-1);
252 }
253
254 if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
255 snprintf(errbuf, PCAP_ERRBUF_SIZE,
256 "PacketGetAdapterNames: %s",
257 pcap_win32strerror());
258 free(AdaptersName);
259 return (-1);
260 }
261
262 /*
263 * "PacketGetAdapterNames()" returned a list of
264 * null-terminated ASCII interface name strings,
265 * terminated by a null string, followed by a list
266 * of null-terminated ASCII interface description
267 * strings, terminated by a null string.
268 * This means there are two ASCII nulls at the end
269 * of the first list.
270 *
271 * Find the end of the first list; that's the
272 * beginning of the second list.
273 */
274 desc = &AdaptersName[0];
275 while (*desc != '\0' || *(desc + 1) != '\0')
276 desc++;
277
278 /*
279 * Found it - "desc" points to the first of the two
280 * nulls at the end of the list of names, so the
281 * first byte of the list of descriptions is two bytes
282 * after it.
283 */
284 desc += 2;
285
286 /*
287 * Loop over the elements in the first list.
288 */
289 name = &AdaptersName[0];
290 while (*name != '\0') {
291 /*
292 * Add an entry for this interface.
293 */
294 if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
295 /*
296 * Failure.
297 */
298 ret = -1;
299 break;
300 }
301 name += strlen(name) + 1;
302 desc += strlen(desc) + 1;
303 }
304
305 if (ret == -1) {
306 /*
307 * We had an error; free the list we've been constructing.
308 */
309 if (devlist != NULL) {
310 pcap_freealldevs(devlist);
311 devlist = NULL;
312 }
313 }
314
315 *alldevsp = devlist;
316 free(AdaptersName);
317 return (ret);
318}
|