/*===================================================================
|
|  Portcheck  version 1
|  Written by Jonathan Harm (110983@lycos.com)
|  http://change.to/opensource
|
========================================================================*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>


int main(viod)
{

   int sock;
   unsigned int portnum;        //portnum can be short or int, but has to be unsigned
   char servIP[16], *servIP_p;  //the array is 16 because that is the maximum length an IP number can be(including the dots)
   struct sockaddr_in serveraddr;  
   
   servIP_p = servIP;   //initialize the pointer


   printf("\nWhat IP do you want to connect to?\n");
   scanf("%s", servIP);

   printf("\n\nWhat port?\n");
   scanf("%u", &portnum);

if(  (sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
     fprintf(stderr, "errer creating socket\n");
     exit(1);
     }


  memset(&serveraddr, 0, sizeof(struct sockaddr_in)); //zero out the struct
  serveraddr.sin_family		= AF_INET;   
  serveraddr.sin_port		= htons(portnum); //make sure the portnumber is in networking byte order
  serveraddr.sin_addr.s_addr	= inet_addr(servIP_p); //convert dotted quad to networking byte order binary number


if( connect(sock, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0) {
   fprintf(stderr, "\nerrer connecting\n");
   exit(1);
   }

else {
  printf("\nConnected successfully!\n");
    }

return 0;
}