/*
===========================================
winwol.c
Author: Jakob Klamra, jklamra@csee.usf.edu
Will wake up a device in power sleep. 
Device NIC must be WOL enabled.
Device motherboard must support WOL.
Device OS must be WOL enabled.
Broadcasts UDP packet with Ethernet address
of the receiver repeated 16 times.
The address is hardcoded.

This code is made to be compiled with
bcc32 for Windows.
The program gives no output if it suceeds.

The platform for this program was made by
dr. Christensen and can be found at
http://www.csee.usf.edu/~christen/tools/server1.c

This program was downloaded from
http://www.csee.usf.edu/~jklamra/upnp/
and is part of a master thesis about
power management in Universal Plug and Play.
===========================================
*/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <winsock.h>
#include <windows.h>

#define BUFMAX	256
#define MACLEN	6
#define IP_ADDR "255.255.255.255"
#define PORT_NUM 65535



main(argc,argv)
int argc;
char *argv[];
{
	WSADATA info;
  unsigned int         my_s;        // the socket
  unsigned char	       optval;
  struct sockaddr_in   my_addr;     // destination addr
  char                 out_buf[BUFMAX];    //  output buffer for data
  char *p;
  int i, j, len;
  char mac[MACLEN];
 
    
if (WSAStartup(MAKEWORD(1,1), &info) != 0)
	printf(stderr,"Cannot initialize WinSock!");
    
   // >>> Step #1 <<<
  // Create a socket
  //   - AF_INET is Address Family Internet 
  my_s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
  
  


  // >>> Step #2 <<<
  // Fill-in my socket's address information and bind the socket
  //   - See winsock.h for a description of struct sockaddr_in
  my_addr.sin_family      = AF_INET;            // Address family to use
  my_addr.sin_port        = htons(PORT_NUM);    // Port number to use
  my_addr.sin_addr.s_addr = inet_addr(IP_ADDR);  //send to IP_ADDR
  
  
 
  for(i = 0; i<6; ++i){
	out_buf[i] = 0xFF;	  
  }
  mac[0] = 0x00;
  mac[1] = 0x00;
  mac[2] = 0x00;
  mac[3] = 0x00;
  mac[4] = 0x00;
  mac[5] = 0x00;
  
  for(i = 1; i<17; ++i){
	for(j = 0; j<MACLEN; ++j)
		out_buf[(i)*6+(j)] = mac[j];
  }
  optval =1;
   if (setsockopt(my_s,SOL_SOCKET,SO_BROADCAST,(char *)&optval,sizeof(optval)) < 0) {
	fprintf(stderr,"Can't set sockopt (%d).\n",errno);
	exit(1);
   }
    

 
    sendto(my_s,out_buf,sizeof(out_buf),0,(struct sockaddr*)&my_addr,sizeof(my_addr));
    closesocket(my_s);

    WSACleanup();
}