#include <stdio.h>
#include "mpi.h"
#include "string.h"

#define MAX_DATA 20

int
main (int argc, char *argv[])
{
  int myid, numprocs, namelen, op;
  char processor_name[MPI_MAX_PROCESSOR_NAME];
  MPI_Comm server;
  MPI_Status status;
  int error=0;

  char port_name[MPI_MAX_PORT_NAME];
  char buf[MAX_DATA];

  MPI_Init (&argc, &argv);
  MPI_Comm_size (MPI_COMM_WORLD, &numprocs);
  MPI_Comm_rank (MPI_COMM_WORLD, &myid);
  MPI_Get_processor_name (processor_name, &namelen);

  printf ("Rank Client Process %d ,TOT processes %d on %s\n", myid, numprocs, processor_name);fflush(stdout);

  if (MPI_Lookup_name ("montest", MPI_INFO_NULL, port_name) != MPI_SUCCESS)
    {
      printf("Name Server supplied don't found or the server is power down!\n");fflush(stdout);
    }
  printf ("Server Name found!\n");

  error = MPI_Comm_connect (port_name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &server);

  if (error == MPI_ERR_PORT)
    {
      printf ("Connection error: %d\n", error);fflush(stdout);
      MPI_Finalize ();
      return 0;
    }
  else
    {
      printf ("Connection OK!\n");fflush(stdout);
      printf ("Server address %s\n", port_name);fflush(stdout);
    }

  MPI_Recv (buf, MAX_DATA, MPI_CHAR, MPI_ANY_SOURCE, MPI_ANY_TAG, server,
            &status);
  printf ("The server has written: %s", buf);fflush(stdout);
  MPI_Comm_disconnect (&server);
  printf ("The Client is disconnected!\n");fflush(stdout);
  MPI_Finalize ();
  return 0;
}