1 /*
2 * Copyright (C) 2012 by Darren Reed.
3 *
4 * See the IPFILTER.LICENCE file for details on licencing.
5 *
6 * $Id: connecttcp.c,v 1.3.2.2 2012/07/22 08:04:24 darren_r Exp $
7 */
8
9 #include "ipf.h"
10 #include <ctype.h>
11
12 /*
13 * Format expected is one address per line, at the start of each line.
14 */
15 int
connecttcp(char * server,int port)16 connecttcp(char *server, int port)
17 {
18 struct sockaddr_in sin;
19 struct hostent *host;
20 int fd;
21
22 memset(&sin, 0, sizeof(sin));
23 sin.sin_family = AF_INET;
24 sin.sin_port = htons(port & 65535);
25
26 if (ISDIGIT(*server)) {
27 if (inet_aton(server, &sin.sin_addr) == -1) {
28 return (-1);
29 }
30 } else {
31 host = gethostbyname(server);
32 if (host == NULL)
33 return (-1);
34 memcpy(&sin.sin_addr, host->h_addr_list[0],
35 sizeof(sin.sin_addr));
36 }
37
38 fd = socket(AF_INET, SOCK_STREAM, 0);
39 if (fd == -1)
40 return (-1);
41
42 if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
43 close(fd);
44 return (-1);
45 }
46
47 return (fd);
48 }
49