/*
 * Copyright (C) 2012 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id: connecttcp.c,v 1.3.2.2 2012/07/22 08:04:24 darren_r Exp $
 */

#include "ipf.h"
#include <ctype.h>

/*
 * Format expected is one address per line, at the start of each line.
 */
int
connecttcp(char *server, int port)
{
        struct sockaddr_in sin;
        struct hostent *host;
        int fd;

        memset(&sin, 0, sizeof(sin));
        sin.sin_family = AF_INET;
        sin.sin_port = htons(port & 65535);

        if (ISDIGIT(*server)) {
                if (inet_aton(server, &sin.sin_addr) == -1) {
                        return (-1);
                }
        } else {
                host = gethostbyname(server);
                if (host == NULL)
                        return (-1);
                memcpy(&sin.sin_addr, host->h_addr_list[0],
                       sizeof(sin.sin_addr));
        }

        fd = socket(AF_INET, SOCK_STREAM, 0);
        if (fd == -1)
                return (-1);

        if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
                close(fd);
                return (-1);
        }

        return (fd);
}