Bind raw socket

rawbind.c

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>

int main() {
  int s = socket(PF_INET, SOCK_RAW, IPPROTO_UDP);
  u_int8_t ip[4] = {127, 0, 0, 1};
  struct sockaddr_storage addr;
  ((struct sockaddr_in*)&addr)->sin_family = AF_INET;
  ((struct sockaddr_in*)&addr)->sin_port = 1500;
  memcpy(&(((struct sockaddr_in*)&addr)->sin_addr), &ip, 4);
  int rc = bind(s, (struct sockaddr*)&addr, sizeof(addr));
  printf("Bind result: %d / %d / %s\n", rc, errno, strerror(errno));
}