49 lines
921 B
C
49 lines
921 B
C
/*
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* Copyright (C) 2012 by Darren Reed.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*
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* $Id: connecttcp.c,v 1.3.2.2 2012/07/22 08:04:24 darren_r Exp $
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*/
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#include "ipf.h"
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#include <ctype.h>
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/*
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* Format expected is one addres per line, at the start of each line.
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*/
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int
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connecttcp(char *server, int port)
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{
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struct sockaddr_in sin;
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struct hostent *host;
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int fd;
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = htons(port & 65535);
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if (ISDIGIT(*server)) {
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if (inet_aton(server, &sin.sin_addr) == -1) {
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return (-1);
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}
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} else {
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host = gethostbyname(server);
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if (host == NULL)
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return (-1);
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memcpy(&sin.sin_addr, host->h_addr_list[0],
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sizeof(sin.sin_addr));
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}
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fd = socket(AF_INET, SOCK_STREAM, 0);
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if (fd == -1)
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return (-1);
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if (connect(fd, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
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close(fd);
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return (-1);
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}
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return (fd);
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}
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