Sending A Packet Via The Raw Socket (Cont.)

#include <netinet/in.h>
#include <arpa/inet.h>

struct sockaddr_in addr;

// prepare the address we're sending the packet to.
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
inet_aton("127.0.0.1", &addr.sin_addr);

// finally, send the packet.
rc = sendto(s,
            &icpmhdr, sizeof(struct icmphdr),
            0 /* flags */,
            (struct sockaddr*)&addr, sizeof(addr));
if (rc == -1) {
    perror("sendto:");
    exit(1);
}

Originally written by guy keren