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C:/temp/src/j2k/Deprecated/UDP.Unix/sender.cpp

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


#define MESSAGE 100

void error_Mess(char *error_message){}

int main(int argc , char *argv[])
{
  int MySocket;
  struct sockaddr_in receiver_addr;
  struct sockaddr_in from_addr;
  unsigned int receiver_port = 0;
  char *host = NULL;
  char *message = NULL;
  char buffer[MESSAGE+1];
  char buffer2[MESSAGE+1];
  int MessLen = 0;
  int Response_Length = 0;
  unsigned int receive_fromSize;
   struct hostent* hostdata = NULL;

  host = argv[1];
  message = argv[2];

  if( (MessLen = strlen(message)) > MESSAGE)
  cout<<"the message is too long \n";

  MySocket = socket(AF_INET, SOCK_DGRAM, 0);

  if(MySocket < 0)
    {
      cout<<"socket error\n";
    }

  cout<<"socket is a success\n";

  if ( atoi( host ) > 0 )
  {
    unsigned long IP = inet_addr( host );
    hostdata = gethostbyaddr( (char*)&IP, sizeof( IP ), PF_INET ); 
  }
  else
  {
    hostdata = gethostbyname( host );
  }

  memset(&receiver_addr, 0, sizeof(receiver_addr));

  receiver_addr.sin_family = AF_INET;
  receiver_addr.sin_addr = *(in_addr*)(hostdata->h_addr_list[0]);
  receiver_addr.sin_port = htons(4000);

  cout << receiver_addr.sin_addr.s_addr << endl;
 

  if((sendto(MySocket , message , MessLen, 0 , (struct sockaddr *)
       &receiver_addr , sizeof(receiver_addr))) != MessLen)
    
    cout<<"sendto sent a different number of bytes than expected "<<endl;
  else
    cout << "Message has been sent\n";

  memset( buffer, 0, sizeof(buffer) );//clear buffer
    
  receive_fromSize = sizeof(from_addr);

  if((Response_Length = recvfrom(MySocket , buffer , MESSAGE , 0, 
   (struct sockaddr *)&from_addr , &receive_fromSize)) !=  MessLen) {
       cout<<"receivedfrom failed\n";
  }

    cout << '[' << MessLen << ']' << endl;
    cout << Response_Length << sizeof( buffer ) << strlen(buffer) << endl;

    cout << '(' << receive_fromSize  << ')' << endl;

    memcpy( buffer2, buffer, 14 );


    int i = 0;

    for(; i < 14; i++ ) 
      printf("[%d]", buffer[i] );



       cout<<"I received the buffer from the receiver: ";
       cout<< buffer <<endl;


  cout << from_addr.sin_addr.s_addr << endl;     //

  if(receiver_addr.sin_addr.s_addr != from_addr.sin_addr.s_addr) {
    cout<<"Error, received message from else where!\n";
  }


  // buffer[Response_Length] = '\0';

  close(MySocket);
  
  return 0;
}

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