#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/libpcap/fad-win32.c,v 1.15 2007-09-25 20:34:36 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <pcap.h>
#include <pcap-int.h>
#include <Packet32.h>
#include <errno.h>
static int
add_addr_to_list(pcap_if_t *curdev, struct sockaddr *addr,
struct sockaddr *netmask, struct sockaddr *broadaddr,
struct sockaddr *dstaddr, char *errbuf)
{
pcap_addr_t *curaddr, *prevaddr, *nextaddr;
curaddr = (pcap_addr_t*)malloc(sizeof(pcap_addr_t));
if (curaddr == NULL) {
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
return (-1);
}
curaddr->next = NULL;
if (addr != NULL) {
curaddr->addr = (struct sockaddr*)dup_sockaddr(addr, sizeof(struct sockaddr_storage));
if (curaddr->addr == NULL) {
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
free(curaddr);
return (-1);
}
} else
curaddr->addr = NULL;
if (netmask != NULL) {
curaddr->netmask = (struct sockaddr*)dup_sockaddr(netmask, sizeof(struct sockaddr_storage));
if (curaddr->netmask == NULL) {
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
free(curaddr);
return (-1);
}
} else
curaddr->netmask = NULL;
if (broadaddr != NULL) {
curaddr->broadaddr = (struct sockaddr*)dup_sockaddr(broadaddr, sizeof(struct sockaddr_storage));
if (curaddr->broadaddr == NULL) {
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
free(curaddr);
return (-1);
}
} else
curaddr->broadaddr = NULL;
if (dstaddr != NULL) {
curaddr->dstaddr = (struct sockaddr*)dup_sockaddr(dstaddr, sizeof(struct sockaddr_storage));
if (curaddr->dstaddr == NULL) {
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
"malloc: %s", pcap_strerror(errno));
free(curaddr);
return (-1);
}
} else
curaddr->dstaddr = NULL;
for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
nextaddr = prevaddr->next;
if (nextaddr == NULL) {
break;
}
}
if (prevaddr == NULL) {
curdev->addresses = curaddr;
} else {
prevaddr->next = curaddr;
}
return (0);
}
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;
if (add_or_find_if(&curdev, devlist, name, 0, desc, errbuf) == -1) {
return (-1);
}
if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
return (0);
}
while (if_addr_size-- > 0) {
if(curdev == NULL)
break;
res = add_addr_to_list(curdev,
(struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
(struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
(struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
NULL,
errbuf);
if (res == -1) {
break;
}
}
return (res);
}
int
pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
{
pcap_if_t *devlist = NULL;
int ret = 0;
const char *desc;
char *AdaptersName;
ULONG NameLength;
char *name;
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);
}
desc = &AdaptersName[0];
while (*desc != '\0' || *(desc + 1) != '\0')
desc++;
desc += 2;
name = &AdaptersName[0];
while (*name != '\0') {
if (pcap_add_if_win32(&devlist, name, desc, errbuf) == -1) {
ret = -1;
break;
}
name += strlen(name) + 1;
desc += strlen(desc) + 1;
}
if (ret != -1) {
if (pcap_platform_finddevs(&devlist, errbuf) < 0)
ret = -1;
}
if (ret == -1) {
if (devlist != NULL) {
pcap_freealldevs(devlist);
devlist = NULL;
}
}
*alldevsp = devlist;
free(AdaptersName);
return (ret);
}