mirror of https://github.com/n1nj4sec/pupy.git
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
#define _GNU_SOURCE
|
|
#include <net/if.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <netinet/in.h>
|
|
#include <dlfcn.h>
|
|
|
|
struct ifaddrs
|
|
{
|
|
struct ifaddrs *ifa_next; /* Pointer to the next structure. */
|
|
|
|
char *ifa_name; /* Name of this network interface. */
|
|
unsigned int ifa_flags; /* Flags as from SIOCGIFFLAGS ioctl. */
|
|
|
|
struct sockaddr *ifa_addr; /* Network address of this interface. */
|
|
struct sockaddr *ifa_netmask; /* Netmask of this interface. */
|
|
union
|
|
{
|
|
/* At most one of the following two is valid. If the IFF_BROADCAST
|
|
bit is set in `ifa_flags', then `ifa_broadaddr' is valid. If the
|
|
IFF_POINTOPOINT bit is set, then `ifa_dstaddr' is valid.
|
|
It is never the case that both these bits are set at once. */
|
|
struct sockaddr *ifu_broadaddr; /* Broadcast address of this interface. */
|
|
struct sockaddr *ifu_dstaddr; /* Point-to-point destination address. */
|
|
} ifa_ifu;
|
|
/* These very same macros are defined by <net/if.h> for `struct ifaddr'.
|
|
So if they are defined already, the existing definitions will be fine. */
|
|
# ifndef ifa_broadaddr
|
|
# define ifa_broadaddr ifa_ifu.ifu_broadaddr
|
|
# endif
|
|
# ifndef ifa_dstaddr
|
|
# define ifa_dstaddr ifa_ifu.ifu_dstaddr
|
|
# endif
|
|
|
|
void *ifa_data; /* Address-specific data (may be unused). */
|
|
};
|
|
|
|
|
|
static int (*_getifaddrs) (struct ifaddrs **__ifap) = NULL;
|
|
static void (*_freeifaddrs) (struct ifaddrs *__ifa) = NULL;
|
|
|
|
static int getifaddrs (struct ifaddrs **__ifap) {
|
|
if (_getifaddrs == -1) return -1;
|
|
if (_getifaddrs == NULL) _getifaddrs = dlsym(RTLD_NEXT, "getifaddrs");
|
|
if (_getifaddrs == NULL) {
|
|
_getifaddrs = -1;
|
|
return -1;
|
|
}
|
|
return _getifaddrs(__ifap);
|
|
}
|
|
|
|
static void freeifaddrs (struct ifaddrs *__ifa) {
|
|
if (_freeifaddrs == -1) return -1;
|
|
if (_freeifaddrs == NULL) _freeifaddrs = dlsym(RTLD_NEXT, "freeifaddrs");
|
|
if (_freeifaddrs) _freeifaddrs(__ifa);
|
|
}
|