Hi i am trying to do packet injection using raw sockets, i have a problem in getting the interface index using SIOCGIFINDEX command of the ioctl. I am using ubuntu 12.04 as my OS. Please help the code is:
int BindRawSocketToInterface(char *device, int rawsock, int protocol)
{
struct sockaddr_ll sll;
struct ifreq ifr;
bzero(&sll, sizeof(sll));
bzero(&ifr, sizeof(ifr));
/* First Get the Interface Index */
strncpy ((char*) ifr.ifr_name, device, IFNAMSIZ);
if ((ioctl(rawsock, SIOCGIFINDEX, &ifr))== -1)
{
printf ("Error getting interface index!\n");
exit(-1);
}
/* Bind our rawsocket to this interface */
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll.sll_protocol = htons(protocol);
if ((bind(rawsock, (struct sockaddr*)&sll,sizeof(sll)))== -1)
{
perror("Error binding raw socket to interface \n");
exit(-1);
}
return 1;
}
Here is an example:
I hope this helps