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/*
cipelib - library routines common to CIPE (user-mode part) and PKCIPE
Copyright 2000 Olaf Titz <olaf@bigred.inka.de>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
2 of the License, or (at your option) any later version.
*/
/* $Id: socks5_cmd.c,v 1.2 2000/11/22 20:23:38 olaf Exp $ */
#include <stdlib.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include "cipelib.h"
#include "socks5_internal.h"
int socks5_cmd(int fd, int cmd, struct sockaddr_in *so)
{
struct socksrq r;
r.ver=5;
r.cmd=cmd;
r.rsv=0;
r.atyp=1;
r.dstaddr=so->sin_addr.s_addr;
r.dstport=so->sin_port;
if (writen(fd, (char *)&r, sizeof(r), "socks5_cmd: wcmd")<0)
goto error;
if (readn(fd, (char *)&r, sizeof(r), "socks5_cmd: rreply")<0)
goto error;
if (r.cmd==0) {
if (r.atyp!=1) {
cipe_syslog(LOG_ERR,
"socks5_cmd: unknown address type %d", r.atyp);
goto error;
}
so->sin_addr.s_addr=r.dstaddr;
so->sin_port=r.dstport;
return fd;
}
cipe_syslog(LOG_ERR, "socks5_cmd: server: %s",
(r.cmd>SOCKS5_MAXERR) ?
"Unknown error" : socks_errlist[(int)r.cmd]);
error:
close(fd);
return -1;
}
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