socket.c

/* $Id: socket.c 1.1 1995/01/01 07:11:14 cthuang Exp $
 *
 * This module has been modified by Radim Kolar for OS/2 emx
 * This module has been modifide by Dave in Linux 2.6.35.14.i686
 */

/***********************************************************************
  module:       socket.c
  program:      popclient
  SCCS ID:      @(#)socket.c    1.5  4/1/94
  programmer:   Virginia Tech Computing Center
  compiler:     DEC RISC C compiler (Ultrix 4.1)
  environment:  DEC Ultrix 4.3
  description:  UNIX sockets code.
 ***********************************************************************/
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "socket.h"
int
Socket(const char *host, int clientPort)
{
	int sock;
	unsigned long inaddr;
	struct sockaddr_in ad;
	struct hostent *hp ;

	memset(&ad, 0, sizeof(ad));
	ad.sin_family = AF_INET;

	inaddr = inet_addr(host);
	if (inaddr != INADDR_NONE)
		memcpy(&ad.sin_addr, &inaddr, sizeof(inaddr));
	else {
		hp = gethostbyname(host);
		if (hp == NULL)
			return -1;
		memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
	}
	ad.sin_port = htons(clientPort);

	sock = socket(AF_INET, SOCK_STREAM, 0);
	if (sock < 0)
		return sock;
	if (connect(sock, (struct sockaddr *)&ad, sizeof(ad)) < 0) {
		close(sock);
		return -1;
	}
	return sock;
}