//====================================================== file = rawsend.c =====
//=  Program to demonstrate raw sockets for sending                           =
//=    - Appends message bytes directly following IP header                   =
//=============================================================================
//=  Notes:                                                                   =
//=    1) This program compiles for Winsock only                              =
//=    2) There is *no* error checking in this program.  Error checking was   =
//=       omitted to simplify the program.                                    =
//=    3) This program assumes that the destination host has its IP address   =
//=       hardcoded into "#define IP_ADDR"                                    =
//=---------------------------------------------------------------------------=
//=  Build: bcc32 rawsend.c ws2_32.lib                                        =
//=---------------------------------------------------------------------------=
//=  History:  KJC (08/17/01) - Genesis                                       =
//=============================================================================
//----- Include files ---------------------------------------------------------
#include <stdio.h>               // Needed for printf()
#include <string.h>              // Needed for memcpy() and strcpy()
#include <winsock2.h>            // Winsock version 2 stuff

//----- Defines ---------------------------------------------------------------
#define  IP_ADDR "131.247.2.215" // IP address of destination (HARDWIRED)

//===== Main program ==========================================================
void main(void)
{
  WORD wVersionRequested = MAKEWORD(1,1); // Stuff for WSA functions
  WSADATA wsaData;                        // Stuff for WSA functions
  unsigned int         dest_s;            // Destination socket descriptor
  struct sockaddr_in   dest_addr;         // Destination Internet address
  int                  mess_len;          // Message length
  char                 mess_buf[1024];    // 1024-byte buffer for message
  int                  i;                 // Loop counter

  // Initialize Winsock
  WSAStartup(wVersionRequested, &wsaData);

  // Create raw socket for destination
  dest_s = WSASocket(AF_INET, SOCK_RAW, IPPROTO_ICMP, 0, 0, 0);

  // Fill-in destination socket's address information
  dest_addr.sin_family      = AF_INET;            // Address family to use
  dest_addr.sin_addr.s_addr = inet_addr(IP_ADDR); // IP address to use

  // Assign message bytes to out_buf
  mess_len = 100;
  for (i=0; i<mess_len; i++)
    mess_buf[i] = i;

  // Now send the message to the destination
  sendto(dest_s, mess_buf, mess_len, 0,
         (struct sockaddr *)&dest_addr, sizeof(dest_addr));

  // Close destination socket
  closesocket(dest_s);

  // Clean-up Winsock
  WSACleanup();
}