mirror of
https://github.com/proxytunnel/proxytunnel.git
synced 2026-01-23 02:34:59 +00:00
888dce8506
(Ex: --header "MyCustomHeader: MyValue) Based on Dieter Heiliger's <dieter.heiliger@gmx.de> idea for a User-Agent header git-svn-id: https://proxytunnel.svn.sourceforge.net/svnroot/proxytunnel/trunk/proxytunnel@39 bc163920-b10d-0410-b2c5-a5491ca2ceef
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
/* Proxytunnel - (C) 2001-2002 Jos Visser / Mark Janssen */
|
|
/* Contact: josv@osp.nl / maniac@maniac.nl */
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
/* http.c */
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <netdb.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include "io.h"
|
|
#include "proxytunnel.h"
|
|
#include "basicauth.h"
|
|
|
|
/*
|
|
* Analyze the proxy's HTTP response. This must be a HTTP/1.? 200 OK type
|
|
* header
|
|
*/
|
|
void analyze_HTTP()
|
|
{
|
|
char *p = strtok( buf, " ");
|
|
|
|
if (strcmp( p, "HTTP/1.0" ) != 0 && strcmp( p, "HTTP/1.1" ) != 0)
|
|
{
|
|
message( "Unsupported HTTP version number %s\n", p );
|
|
exit( 1 );
|
|
}
|
|
|
|
p = strtok( 0, " ");
|
|
|
|
if( strcmp( p, "200" ) != 0 )
|
|
{
|
|
message( "HTTP return code: '%s'\n", p );
|
|
p += strlen( p ) + 1;
|
|
message( "%s\n", p );
|
|
exit( 1 );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Execute the basic proxy protocol of CONNECT and response, until the
|
|
* last line of the response has been read. The tunnel is then open.
|
|
*/
|
|
void proxy_protocol()
|
|
{
|
|
/*
|
|
* Create the proxy CONNECT command into buf
|
|
*/
|
|
|
|
if( args_info.dottedquad_flag )
|
|
{
|
|
static char ipbuf[16]; /* IPv4: 'xxx.xxx.xxx.xxx' + \0 = 16 */
|
|
struct hostent * he = gethostbyname( args_info.desthost_arg );
|
|
if ( he )
|
|
{
|
|
sprintf( ipbuf, "%d.%d.%d.%d",
|
|
he->h_addr[0] & 255,
|
|
he->h_addr[1] & 255,
|
|
he->h_addr[2] & 255,
|
|
he->h_addr[3] & 255 );
|
|
|
|
if( args_info.verbose_flag )
|
|
{
|
|
message( "DEBUG: ipbuf = '%s'\n", ipbuf );
|
|
message( "DEBUG: desthost = '%s'\n",
|
|
args_info.desthost_arg );
|
|
}
|
|
|
|
args_info.desthost_arg = ipbuf;
|
|
|
|
if( args_info.verbose_flag )
|
|
message( "DEBUG: desthost = '%s'\n",
|
|
args_info.desthost_arg );
|
|
|
|
}
|
|
else if( args_info.verbose_flag )
|
|
message( "Can't lookup dest host: %s.\n",
|
|
args_info.desthost_arg );
|
|
|
|
}
|
|
|
|
sprintf( buf, "CONNECT %s:%d HTTP/1.0\r\n",
|
|
args_info.desthost_arg, args_info.destport_arg );
|
|
|
|
if ( args_info.user_given && args_info.pass_given )
|
|
{
|
|
/*
|
|
* Create connect string including the authorization part
|
|
*/
|
|
sprintf( buf, "%sProxy-authorization: Basic %s\r\n",
|
|
buf, basicauth );
|
|
}
|
|
|
|
if ( args_info.header_given )
|
|
{
|
|
/*
|
|
* Add extra header(s)
|
|
*/
|
|
sprintf( buf, "%s%s\r\n\r\n", buf, args_info.header_arg );
|
|
}
|
|
|
|
if( args_info.verbose_flag )
|
|
message( "Connect string sent to Proxy: '%s'\n", buf);
|
|
|
|
/*
|
|
* Send the CONNECT instruction to the proxy
|
|
*/
|
|
if( send( sd, buf, strlen( buf ), 0 ) < 0 )
|
|
{
|
|
my_perror( "Socket write error" );
|
|
exit( 1 );
|
|
}
|
|
|
|
/*
|
|
* Read the first line of the response and analyze it
|
|
*/
|
|
readline();
|
|
analyze_HTTP();
|
|
|
|
/*
|
|
* Then, repeat reading lines of the responses until a blank line
|
|
* (which signifies the end of the response) is encountered.
|
|
*/
|
|
do {
|
|
readline();
|
|
} while ( strcmp( buf, "\r\n" ) != 0 );
|
|
}
|