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[tshadowa]

Anyone know how could I PRELOAD my own modified ioctl ? (modified to return a specific macd address)

#include <dlfcn.h>
#include <net/if.h>
#include <string.h>
typedef int (*ioctl_t)(int, unsigned long int, char *);
int ioctl(int d, unsigned long int request, char *argp) { int out; ioctl_t realioctl;
void *libhandle; /* mac address here */ char data[14] = {0x00,0x00,0x00,0x00,0x00,0x00,0,0,0,0,0,0,0,0};
struct ifreq *var1; var1 = (struct ifreq *)argp;
if (request == 35111) { memcpy(var1->ifr_hwaddr.sa_data, data, 14); out = 0; } else {
libhandle = dlopen("/lib/libc.so.6", RTLD_LAZY); realioctl = dlsym(libhandle, "ioctl");
out = realioctl(d, request, argp); dlclose(libhandle); } return out; }
#include <sys/utsname.h>
typedef int (*uname_t)(struct utsname *);
int uname(struct utsname *buf) { int out; void *libhandle; uname_t real_uname;
libhandle = dlopen("/lib/libc.so.6", RTLD_LAZY); real_uname = dlsym(libhandle, "uname");
out = real_uname(buf); strncpy(buf->nodename, "localhost", SYS_NMLN);
dlclose(libhandle); return out; }

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