2 * Copyright (c) 2002 - 2003
3 * NetGroup, Politecnico di Torino (Italy)
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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
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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.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 static 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)";
49 * Add an entry to the list of addresses for an interface.
50 * "curdev" is the entry for that interface.
53 add_addr_to_list(pcap_if_t *curdev, struct sockaddr *addr,
54 struct sockaddr *netmask, struct sockaddr *broadaddr,
55 struct sockaddr *dstaddr, char *errbuf)
57 pcap_addr_t *curaddr, *prevaddr, *nextaddr;
60 * Allocate the new entry and fill it in.
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));
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));
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));
90 curaddr->netmask = NULL;
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));
101 curaddr->broadaddr = NULL;
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));
112 curaddr->dstaddr = NULL;
115 * Find the end of the list of addresses.
117 for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
118 nextaddr = prevaddr->next;
119 if (nextaddr == NULL) {
121 * This is the end of the list.
127 if (prevaddr == NULL) {
129 * The list was empty; this is the first member.
131 curdev->addresses = curaddr;
134 * "prevaddr" is the last member of the list; append
137 prevaddr->next = curaddr;
145 pcap_add_if_win32(pcap_if_t **devlist, char *name, const char *desc,
149 npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
153 if_addr_size = MAX_NETWORK_ADDRESSES;
156 * Add an entry for this interface, with no addresses.
158 if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
166 * Get the list of addresses for the interface.
168 if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
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.
176 * We return an entry with an empty address list.
182 * Now add the addresses.
184 while (if_addr_size-- > 0) {
186 * "curdev" is an entry for this interface; add an entry for
187 * this address to its list of addresses.
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,
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.
215 * Win32 implementation, based on WinPcap
218 pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
220 pcap_if_t *devlist = NULL;
227 if(!PacketGetAdapterNames(NULL, &NameLength) && NameLength == 0)
230 * If PacketGetAdapterNames *and* sets the lenght of the buffer to zero,
231 * it means there was an error.
233 snprintf(errbuf, PCAP_ERRBUF_SIZE, "PacketGetAdapterNames failed: %s", pcap_win32strerror());
239 AdaptersName = (char*) malloc(NameLength);
242 snprintf(errbuf, PCAP_ERRBUF_SIZE, "no adapters found.");
246 if (AdaptersName == NULL)
248 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
252 if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
253 snprintf(errbuf, PCAP_ERRBUF_SIZE,
254 "PacketGetAdapterNames: %s",
255 pcap_win32strerror());
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
269 * Find the end of the first list; that's the
270 * beginning of the second list.
272 desc = &AdaptersName[0];
273 while (*desc != '\0' || *(desc + 1) != '\0')
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
285 * Loop over the elements in the first list.
287 name = &AdaptersName[0];
288 while (*name != '\0') {
290 * Add an entry for this interface.
292 if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
299 name += strlen(name) + 1;
300 desc += strlen(desc) + 1;
305 * We had an error; free the list we've been constructing.
307 if (devlist != NULL) {
308 pcap_freealldevs(devlist);