dce_socket.c

Ho Chi Minh City University of Technology Computer Science Department Distributed Computing E

/***************************************
Ho Chi Minh City University of Technology
    Computer Science Department 
Distributed Computing Environment (DCE)
Written by Nguyen Van Noi -59406114
File dce_socket.c on Mon Dec 14 20:22:04 1998
****************************************/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "dce_utils.h"

#define MAXLISTEN 5
int
dce_connect (u_long uAddr, int nPort)
{
  int sock;
  struct sockaddr_in addr;

  if ((sock = socket (AF_INET, SOCK_STREAM, 0)) == -1)
    return -1;
  memset ((void *) &addr, 0, sizeof (addr));
  addr.sin_addr.s_addr = uAddr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons (nPort);
  if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) == -1)
    {
      close (sock);
      return -1;
    }

  return sock;

}


int
dce_socket (int *nPort)
{
  static int p = 1024;
  int desc;
  struct sockaddr_in addr;
  int addr_length;
  int option_value = 1;

  if ((desc = socket (AF_INET, SOCK_STREAM, 0)) == -1)
    return -1;
  if (setsockopt (desc, SOL_SOCKET, SO_REUSEADDR, (char *) (&option_value), sizeof (int)) == -1)
    {
      close (desc);
      return -1;
    }
  memset (&addr, 0, sizeof (addr));
  addr.sin_addr.s_addr = getmyaddr ();
  addr.sin_family = AF_INET;
  do
    {
      addr.sin_port = htons (p++);
      if (!p)
	{
	  close (desc);
	  return -1;
	}
    }
  while (bind (desc, (struct sockaddr *) &addr, sizeof (addr)));

  addr_length = sizeof (addr);
  if ((getsockname (desc, (struct sockaddr *) &addr, &addr_length)) == -1)
    {
      close (desc);
      return -1;
    }
  *nPort = ntohs (addr.sin_port);
  listen (desc, MAXLISTEN);
  return (desc);
}

int
dce_socketaccept (int sock)
{
  struct sockaddr addr;
  int addrlen = sizeof (addr);
  return accept (sock, &addr, &addrlen);
}