mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
249 lines
6.5 KiB
C
249 lines
6.5 KiB
C
/*
|
|
* Copyright (c) 2002 - 2005 NetGroup, Politecnico di Torino (Italy)
|
|
* Copyright (c) 2005 - 2006 CACE Technologies, Davis (California)
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Politecnico di Torino, CACE Technologies
|
|
* nor the names of its contributors may be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <pcap.h>
|
|
#include <pcap-int.h>
|
|
#include <Packet32.h>
|
|
|
|
#include <errno.h>
|
|
|
|
static int
|
|
pcap_add_if_win32(pcap_if_t **devlist, char *name, const char *desc,
|
|
char *errbuf)
|
|
{
|
|
pcap_if_t *curdev;
|
|
npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
|
|
LONG if_addr_size;
|
|
int res = 0;
|
|
|
|
if_addr_size = MAX_NETWORK_ADDRESSES;
|
|
|
|
/*
|
|
* Add an entry for this interface, with no addresses.
|
|
*/
|
|
if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Get the list of addresses for the interface.
|
|
*/
|
|
if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
|
|
/*
|
|
* Failure.
|
|
*
|
|
* We don't return an error, because this can happen with
|
|
* NdisWan interfaces, and we want to supply them even
|
|
* if we can't supply their addresses.
|
|
*
|
|
* We return an entry with an empty address list.
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Now add the addresses.
|
|
*/
|
|
while (if_addr_size-- > 0) {
|
|
/*
|
|
* "curdev" is an entry for this interface; add an entry for
|
|
* this address to its list of addresses.
|
|
*/
|
|
if(curdev == NULL)
|
|
break;
|
|
res = add_addr_to_dev(curdev,
|
|
(struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
|
|
sizeof (struct sockaddr_storage),
|
|
(struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
|
|
sizeof (struct sockaddr_storage),
|
|
(struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
|
|
sizeof (struct sockaddr_storage),
|
|
NULL,
|
|
0,
|
|
errbuf);
|
|
if (res == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (res);
|
|
}
|
|
|
|
|
|
/*
|
|
* Get a list of all interfaces that are up and that we can open.
|
|
* Returns -1 on error, 0 otherwise.
|
|
* The list, as returned through "alldevsp", may be null if no interfaces
|
|
* were up and could be opened.
|
|
*
|
|
* Win32 implementation, based on WinPcap
|
|
*/
|
|
int
|
|
pcap_findalldevs_interfaces(pcap_if_t **alldevsp, char *errbuf)
|
|
{
|
|
pcap_if_t *devlist = NULL;
|
|
int ret = 0;
|
|
const char *desc;
|
|
char *AdaptersName;
|
|
ULONG NameLength;
|
|
char *name;
|
|
|
|
/*
|
|
* Find out how big a buffer we need.
|
|
*
|
|
* This call should always return FALSE; if the error is
|
|
* ERROR_INSUFFICIENT_BUFFER, NameLength will be set to
|
|
* the size of the buffer we need, otherwise there's a
|
|
* problem, and NameLength should be set to 0.
|
|
*
|
|
* It shouldn't require NameLength to be set, but,
|
|
* at least as of WinPcap 4.1.3, it checks whether
|
|
* NameLength is big enough before it checks for a
|
|
* NULL buffer argument, so, while it'll still do
|
|
* the right thing if NameLength is uninitialized and
|
|
* whatever junk happens to be there is big enough
|
|
* (because the pointer argument will be null), it's
|
|
* still reading an uninitialized variable.
|
|
*/
|
|
NameLength = 0;
|
|
if (!PacketGetAdapterNames(NULL, &NameLength))
|
|
{
|
|
DWORD last_error = GetLastError();
|
|
|
|
if (last_error != ERROR_INSUFFICIENT_BUFFER)
|
|
{
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
|
"PacketGetAdapterNames: %s",
|
|
pcap_win32strerror());
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (NameLength > 0)
|
|
AdaptersName = (char*) malloc(NameLength);
|
|
else
|
|
{
|
|
*alldevsp = NULL;
|
|
return 0;
|
|
}
|
|
if (AdaptersName == NULL)
|
|
{
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
|
|
return (-1);
|
|
}
|
|
|
|
if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
|
"PacketGetAdapterNames: %s",
|
|
pcap_win32strerror());
|
|
free(AdaptersName);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* "PacketGetAdapterNames()" returned a list of
|
|
* null-terminated ASCII interface name strings,
|
|
* terminated by a null string, followed by a list
|
|
* of null-terminated ASCII interface description
|
|
* strings, terminated by a null string.
|
|
* This means there are two ASCII nulls at the end
|
|
* of the first list.
|
|
*
|
|
* Find the end of the first list; that's the
|
|
* beginning of the second list.
|
|
*/
|
|
desc = &AdaptersName[0];
|
|
while (*desc != '\0' || *(desc + 1) != '\0')
|
|
desc++;
|
|
|
|
/*
|
|
* Found it - "desc" points to the first of the two
|
|
* nulls at the end of the list of names, so the
|
|
* first byte of the list of descriptions is two bytes
|
|
* after it.
|
|
*/
|
|
desc += 2;
|
|
|
|
/*
|
|
* Loop over the elements in the first list.
|
|
*/
|
|
name = &AdaptersName[0];
|
|
while (*name != '\0') {
|
|
/*
|
|
* Add an entry for this interface.
|
|
*/
|
|
if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
ret = -1;
|
|
break;
|
|
}
|
|
name += strlen(name) + 1;
|
|
desc += strlen(desc) + 1;
|
|
}
|
|
|
|
if (ret != -1) {
|
|
/*
|
|
* We haven't had any errors yet; do any platform-specific
|
|
* operations to add devices.
|
|
*/
|
|
if (pcap_platform_finddevs(&devlist, errbuf) < 0)
|
|
ret = -1;
|
|
}
|
|
|
|
if (ret == -1) {
|
|
/*
|
|
* We had an error; free the list we've been constructing.
|
|
*/
|
|
if (devlist != NULL) {
|
|
pcap_freealldevs(devlist);
|
|
devlist = NULL;
|
|
}
|
|
}
|
|
|
|
*alldevsp = devlist;
|
|
free(AdaptersName);
|
|
return (ret);
|
|
}
|