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connecttcp.c revision 1.1 
      1 /*	$NetBSD: connecttcp.c,v 1.1 2012/03/23 21:20:08 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2009 by Darren Reed.
      5  *
      6  * See the IPFILTER.LICENCE file for details on licencing.
      7  *
      8  * Id: connecttcp.c,v 1.3.2.1 2012/01/26 05:44:26 darren_r Exp
      9  */
     10 
     11 #include "ipf.h"
     12 #include <ctype.h>
     13 
     14 /*
     15  * Format expected is one addres per line, at the start of each line.
     16  */
     17 int
     18 connecttcp(char *server, int port)
     19 {
     20 	struct sockaddr_in sin;
     21 	struct hostent *host;
     22 	int fd;
     23 
     24 	memset(&sin, 0, sizeof(sin));
     25 	sin.sin_family = AF_INET;
     26 	sin.sin_port = htons(port & 65535);
     27 
     28 	if (ISDIGIT(*server)) {
     29 		if (inet_aton(server, &sin.sin_addr) == -1) {
     30 			return -1;
     31 		}
     32 	} else {
     33 		host = gethostbyname(server);
     34 		if (host == NULL)
     35 			return -1;
     36 		memcpy(&sin.sin_addr, host->h_addr_list[0],
     37 		       sizeof(sin.sin_addr));
     38 	}
     39 
     40 	fd = socket(AF_INET, SOCK_STREAM, 0);
     41 	if (fd == -1)
     42 		return -1;
     43 
     44 	if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
     45 		close(fd);
     46 		return -1;
     47 	}
     48 
     49 	return fd;
     50 }
     51