2 * Copyright (c) 2002 - 2005 NetGroup, Politecnico di Torino (Italy)
3 * Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
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
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, 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
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,
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26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 pcap_add_if_win32(pcap_if_t
**devlist
, char *name
, const char *desc
,
49 npf_if_addr if_addrs
[MAX_NETWORK_ADDRESSES
];
53 if_addr_size
= MAX_NETWORK_ADDRESSES
;
56 * Add an entry for this interface, with no addresses.
58 if (add_or_find_if(&curdev
, devlist
, name
, 0, desc
, errbuf
) == -1) {
66 * Get the list of addresses for the interface.
68 if (!PacketGetNetInfoEx((void *)name
, if_addrs
, &if_addr_size
)) {
72 * We don't return an error, because this can happen with
73 * NdisWan interfaces, and we want to supply them even
74 * if we can't supply their addresses.
76 * We return an entry with an empty address list.
82 * Now add the addresses.
84 while (if_addr_size
-- > 0) {
86 * "curdev" is an entry for this interface; add an entry for
87 * this address to its list of addresses.
91 res
= add_addr_to_dev(curdev
,
92 (struct sockaddr
*)&if_addrs
[if_addr_size
].IPAddress
,
93 sizeof (struct sockaddr_storage
),
94 (struct sockaddr
*)&if_addrs
[if_addr_size
].SubnetMask
,
95 sizeof (struct sockaddr_storage
),
96 (struct sockaddr
*)&if_addrs
[if_addr_size
].Broadcast
,
97 sizeof (struct sockaddr_storage
),
114 * Get a list of all interfaces that are up and that we can open.
115 * Returns -1 on error, 0 otherwise.
116 * The list, as returned through "alldevsp", may be null if no interfaces
117 * were up and could be opened.
119 * Win32 implementation, based on WinPcap
122 pcap_findalldevs_interfaces(pcap_if_t
**alldevsp
, char *errbuf
)
124 pcap_if_t
*devlist
= NULL
;
132 * Find out how big a buffer we need.
134 * This call should always return FALSE; if the error is
135 * ERROR_INSUFFICIENT_BUFFER, NameLength will be set to
136 * the size of the buffer we need, otherwise there's a
137 * problem, and NameLength should be set to 0.
139 * It shouldn't require NameLength to be set, but,
140 * at least as of WinPcap 4.1.3, it checks whether
141 * NameLength is big enough before it checks for a
142 * NULL buffer argument, so, while it'll still do
143 * the right thing if NameLength is uninitialized and
144 * whatever junk happens to be there is big enough
145 * (because the pointer argument will be null), it's
146 * still reading an uninitialized variable.
149 if (!PacketGetAdapterNames(NULL
, &NameLength
))
151 DWORD last_error
= GetLastError();
153 if (last_error
!= ERROR_INSUFFICIENT_BUFFER
)
155 snprintf(errbuf
, PCAP_ERRBUF_SIZE
,
156 "PacketGetAdapterNames: %s",
157 pcap_win32strerror());
163 AdaptersName
= (char*) malloc(NameLength
);
169 if (AdaptersName
== NULL
)
171 snprintf(errbuf
, PCAP_ERRBUF_SIZE
, "Cannot allocate enough memory to list the adapters.");
175 if (!PacketGetAdapterNames(AdaptersName
, &NameLength
)) {
176 snprintf(errbuf
, PCAP_ERRBUF_SIZE
,
177 "PacketGetAdapterNames: %s",
178 pcap_win32strerror());
184 * "PacketGetAdapterNames()" returned a list of
185 * null-terminated ASCII interface name strings,
186 * terminated by a null string, followed by a list
187 * of null-terminated ASCII interface description
188 * strings, terminated by a null string.
189 * This means there are two ASCII nulls at the end
192 * Find the end of the first list; that's the
193 * beginning of the second list.
195 desc
= &AdaptersName
[0];
196 while (*desc
!= '\0' || *(desc
+ 1) != '\0')
200 * Found it - "desc" points to the first of the two
201 * nulls at the end of the list of names, so the
202 * first byte of the list of descriptions is two bytes
208 * Loop over the elements in the first list.
210 name
= &AdaptersName
[0];
211 while (*name
!= '\0') {
213 * Add an entry for this interface.
215 if (pcap_add_if_win32(&devlist
, name
, desc
, errbuf
) == -1) {
222 name
+= strlen(name
) + 1;
223 desc
+= strlen(desc
) + 1;
228 * We haven't had any errors yet; do any platform-specific
229 * operations to add devices.
231 if (pcap_platform_finddevs(&devlist
, errbuf
) < 0)
237 * We had an error; free the list we've been constructing.
239 if (devlist
!= NULL
) {
240 pcap_freealldevs(devlist
);