mirror of
https://github.com/yuzu-emu/mbedtls
synced 2024-11-25 11:18:59 +00:00
551 lines
16 KiB
C
551 lines
16 KiB
C
/*
|
|
* UDP proxy: emulate an unreliable UDP connexion for DTLS testing
|
|
*
|
|
* Copyright (C) 2006-2014, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#if !defined(POLARSSL_CONFIG_FILE)
|
|
#include "polarssl/config.h"
|
|
#else
|
|
#include POLARSSL_CONFIG_FILE
|
|
#endif
|
|
|
|
#if !defined(POLARSSL_NET_C)
|
|
#include <stdio.h>
|
|
int main( void )
|
|
{
|
|
printf( "POLARSSL_NET_C not defined.\n" );
|
|
return( 0 );
|
|
}
|
|
#else
|
|
|
|
#include "polarssl/net.h"
|
|
#include "polarssl/error.h"
|
|
#include "polarssl/ssl.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
/* For select() */
|
|
#if (defined(_WIN32) || defined(_WIN32_WCE)) && !defined(EFIX64) && \
|
|
!defined(EFI32)
|
|
#include <winsock2.h>
|
|
#include <windows.h>
|
|
#if defined(_MSC_VER)
|
|
#if defined(_WIN32_WCE)
|
|
#pragma comment( lib, "ws2.lib" )
|
|
#else
|
|
#pragma comment( lib, "ws2_32.lib" )
|
|
#endif
|
|
#endif /* _MSC_VER */
|
|
#else /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#endif /* ( _WIN32 || _WIN32_WCE ) && !EFIX64 && !EFI32 */
|
|
|
|
/* For gettimeofday() */
|
|
#if !defined(_WIN32)
|
|
#include <sys/time.h>
|
|
#endif
|
|
|
|
#define MAX_MSG_SIZE 16384 + 2048 /* max record/datagram size */
|
|
|
|
#define DFL_SERVER_ADDR "localhost"
|
|
#define DFL_SERVER_PORT 4433
|
|
#define DFL_LISTEN_ADDR "localhost"
|
|
#define DFL_LISTEN_PORT 5556
|
|
|
|
#define USAGE \
|
|
"\n usage: udp_proxy param=<>...\n" \
|
|
"\n acceptable parameters:\n" \
|
|
" server_addr=%%d default: localhost\n" \
|
|
" server_port=%%d default: 4433\n" \
|
|
" listen_addr=%%d default: localhost\n" \
|
|
" listen_port=%%d default: 4433\n" \
|
|
"\n" \
|
|
" duplicate=%%d default: 0 (no duplication)\n" \
|
|
" duplicate about 1:N packets randomly\n" \
|
|
" delay=%%d default: 0 (no delayed packets)\n" \
|
|
" delay about 1:N packets randomly\n" \
|
|
" delay_ccs=%%d default: 0 (don't delay ChangeCipherSpec)\n" \
|
|
" drop=%%d default: 0 (no dropped packets)\n" \
|
|
" drop about 1:N packets randomly\n" \
|
|
" mtu=%%d default: 0 (unlimited)\n" \
|
|
" drop packets larger than N bytes\n" \
|
|
" bad_ad=%%d default: 0 (don't add bad ApplicationData)\n" \
|
|
"\n" \
|
|
" seed=%%d default: (use current time)\n" \
|
|
"\n"
|
|
|
|
/*
|
|
* global options
|
|
*/
|
|
static struct options
|
|
{
|
|
const char *server_addr; /* address to forward packets to */
|
|
int server_port; /* port to forward packets to */
|
|
const char *listen_addr; /* address for accepting client connections */
|
|
int listen_port; /* port for accepting client connections */
|
|
|
|
int duplicate; /* duplicate 1 in N packets (none if 0) */
|
|
int delay; /* delay 1 packet in N (none if 0) */
|
|
int delay_ccs; /* delay ChangeCipherSpec */
|
|
int drop; /* drop 1 packet in N (none if 0) */
|
|
int mtu; /* drop packets larger than this */
|
|
int bad_ad; /* inject corrupted ApplicationData record */
|
|
|
|
unsigned int seed; /* seed for "random" events */
|
|
} opt;
|
|
|
|
static void exit_usage( const char *name, const char *value )
|
|
{
|
|
if( value == NULL )
|
|
printf( " unknown option or missing value: %s\n", name );
|
|
else
|
|
printf( " option %s: illegal value: %s\n", name, value );
|
|
|
|
printf( USAGE );
|
|
exit( 1 );
|
|
}
|
|
|
|
static void get_options( int argc, char *argv[] )
|
|
{
|
|
int i;
|
|
char *p, *q;
|
|
|
|
opt.server_addr = DFL_SERVER_ADDR;
|
|
opt.server_port = DFL_SERVER_PORT;
|
|
opt.listen_addr = DFL_LISTEN_ADDR;
|
|
opt.listen_port = DFL_LISTEN_PORT;
|
|
/* Other members default to 0 */
|
|
|
|
for( i = 1; i < argc; i++ )
|
|
{
|
|
p = argv[i];
|
|
if( ( q = strchr( p, '=' ) ) == NULL )
|
|
exit_usage( p, NULL );
|
|
*q++ = '\0';
|
|
|
|
if( strcmp( p, "server_addr" ) == 0 )
|
|
opt.server_addr = q;
|
|
else if( strcmp( p, "server_port" ) == 0 )
|
|
{
|
|
opt.server_port = atoi( q );
|
|
if( opt.server_port < 1 || opt.server_port > 65535 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "listen_addr" ) == 0 )
|
|
opt.listen_addr = q;
|
|
else if( strcmp( p, "listen_port" ) == 0 )
|
|
{
|
|
opt.listen_port = atoi( q );
|
|
if( opt.listen_port < 1 || opt.listen_port > 65535 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "duplicate" ) == 0 )
|
|
{
|
|
opt.duplicate = atoi( q );
|
|
if( opt.duplicate < 0 || opt.duplicate > 20 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "delay" ) == 0 )
|
|
{
|
|
opt.delay = atoi( q );
|
|
if( opt.delay < 0 || opt.delay > 20 || opt.delay == 1 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "delay_ccs" ) == 0 )
|
|
{
|
|
opt.delay_ccs = atoi( q );
|
|
if( opt.delay_ccs < 0 || opt.delay_ccs > 1 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "drop" ) == 0 )
|
|
{
|
|
opt.drop = atoi( q );
|
|
if( opt.drop < 0 || opt.drop > 20 || opt.drop == 1 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "mtu" ) == 0 )
|
|
{
|
|
opt.mtu = atoi( q );
|
|
if( opt.mtu < 0 || opt.mtu > MAX_MSG_SIZE )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "bad_ad" ) == 0 )
|
|
{
|
|
opt.bad_ad = atoi( q );
|
|
if( opt.bad_ad < 0 || opt.bad_ad > 1 )
|
|
exit_usage( p, q );
|
|
}
|
|
else if( strcmp( p, "seed" ) == 0 )
|
|
{
|
|
opt.seed = atoi( q );
|
|
if( opt.seed == 0 )
|
|
exit_usage( p, q );
|
|
}
|
|
else
|
|
exit_usage( p, NULL );
|
|
}
|
|
}
|
|
|
|
static const char *msg_type( unsigned char *msg, size_t len )
|
|
{
|
|
if( len < 1 ) return( "Invalid" );
|
|
switch( msg[0] )
|
|
{
|
|
case SSL_MSG_CHANGE_CIPHER_SPEC: return( "ChangeCipherSpec" );
|
|
case SSL_MSG_ALERT: return( "Alert" );
|
|
case SSL_MSG_APPLICATION_DATA: return( "ApplicationData" );
|
|
case SSL_MSG_HANDSHAKE: break; /* See below */
|
|
default: return( "Unknown" );
|
|
}
|
|
|
|
if( len < 13 ) return( "Invalid handshake" );
|
|
switch( msg[13] )
|
|
{
|
|
case SSL_HS_HELLO_REQUEST: return( "HelloRequest" );
|
|
case SSL_HS_CLIENT_HELLO: return( "ClientHello" );
|
|
case SSL_HS_SERVER_HELLO: return( "ServerHello" );
|
|
case SSL_HS_HELLO_VERIFY_REQUEST: return( "HelloVerifyRequest" );
|
|
case SSL_HS_NEW_SESSION_TICKET: return( "NewSessionTicket" );
|
|
case SSL_HS_CERTIFICATE: return( "Certificate" );
|
|
case SSL_HS_SERVER_KEY_EXCHANGE: return( "ServerKeyExchange" );
|
|
case SSL_HS_CERTIFICATE_REQUEST: return( "CertificateRequest" );
|
|
case SSL_HS_SERVER_HELLO_DONE: return( "ServerHelloDone" );
|
|
case SSL_HS_CERTIFICATE_VERIFY: return( "CertificateVerify" );
|
|
case SSL_HS_CLIENT_KEY_EXCHANGE: return( "ClientKeyExchange" );
|
|
case SSL_HS_FINISHED: return( "Finished" );
|
|
default: return( "Unknown handshake" );
|
|
}
|
|
}
|
|
|
|
/* Return elapsed time in milliseconds since the first call */
|
|
static unsigned long ellapsed_time( void )
|
|
{
|
|
#if defined(_WIN32)
|
|
return( 0 );
|
|
#else
|
|
static struct timeval ref = { 0, 0 };
|
|
struct timeval now;
|
|
|
|
if( ref.tv_sec == 0 && ref.tv_usec == 0 )
|
|
{
|
|
gettimeofday( &ref, NULL );
|
|
return( 0 );
|
|
}
|
|
|
|
gettimeofday( &now, NULL );
|
|
return( 1000 * ( now.tv_sec - ref.tv_sec )
|
|
+ ( now.tv_usec - ref.tv_usec ) / 1000 );
|
|
#endif
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
void *dst;
|
|
const char *way;
|
|
const char *type;
|
|
unsigned len;
|
|
unsigned char buf[MAX_MSG_SIZE];
|
|
} packet;
|
|
|
|
/* Print packet. Outgoing packets come with a reason (forward, dupl, etc.) */
|
|
void print_packet( const packet *p, const char *why )
|
|
{
|
|
if( why == NULL )
|
|
printf( " %05lu %s %s (%u bytes)\n",
|
|
ellapsed_time(), p->way, p->type, p->len );
|
|
else
|
|
printf( " %s %s (%u bytes): %s\n",
|
|
p->way, p->type, p->len, why );
|
|
fflush( stdout );
|
|
}
|
|
|
|
int send_packet( const packet *p, const char *why )
|
|
{
|
|
int ret;
|
|
|
|
/* insert corrupted ApplicationData record? */
|
|
if( opt.bad_ad &&
|
|
strcmp( p->type, "ApplicationData" ) == 0 )
|
|
{
|
|
unsigned char buf[MAX_MSG_SIZE];
|
|
memcpy( buf, p->buf, p->len );
|
|
++buf[p->len - 1];
|
|
|
|
print_packet( p, "corrupted" );
|
|
if( ( ret = net_send( p->dst, buf, p->len ) ) <= 0 )
|
|
{
|
|
printf( " ! net_send returned %d\n", ret );
|
|
return( ret );
|
|
}
|
|
}
|
|
|
|
print_packet( p, why );
|
|
if( ( ret = net_send( p->dst, p->buf, p->len ) ) <= 0 )
|
|
{
|
|
printf( " ! net_send returned %d\n", ret );
|
|
return( ret );
|
|
}
|
|
|
|
/* Don't duplicate Application Data, only handshake covered */
|
|
if( opt.duplicate != 0 &&
|
|
strcmp( p->type, "ApplicationData" ) != 0 &&
|
|
rand() % opt.duplicate == 0 )
|
|
{
|
|
print_packet( p, "duplicated" );
|
|
|
|
if( ( ret = net_send( p->dst, p->buf, p->len ) ) <= 0 )
|
|
{
|
|
printf( " ! net_send returned %d\n", ret );
|
|
return( ret );
|
|
}
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static packet prev;
|
|
|
|
void clear_pending( void )
|
|
{
|
|
memset( &prev, 0, sizeof( packet ) );
|
|
}
|
|
|
|
int handle_message( const char *way, int dst, int src )
|
|
{
|
|
int ret;
|
|
packet cur;
|
|
|
|
/* receive packet */
|
|
if( ( ret = net_recv( &src, cur.buf, sizeof( cur.buf ) ) ) <= 0 )
|
|
{
|
|
printf( " ! net_recv returned %d\n", ret );
|
|
return( ret );
|
|
}
|
|
|
|
cur.len = ret;
|
|
cur.type = msg_type( cur.buf, cur.len );
|
|
cur.way = way;
|
|
cur.dst = &dst;
|
|
print_packet( &cur, NULL );
|
|
|
|
/* do we want to drop, delay, or forward it? */
|
|
if( ( opt.mtu != 0 &&
|
|
cur.len > (unsigned) opt.mtu ) ||
|
|
( opt.drop != 0 &&
|
|
strcmp( cur.type, "ApplicationData" ) != 0 &&
|
|
rand() % opt.drop == 0 ) )
|
|
{
|
|
; /* Nothing to do */
|
|
}
|
|
else if( ( opt.delay_ccs == 1 &&
|
|
strcmp( cur.type, "ChangeCipherSpec" ) == 0 ) ||
|
|
( opt.delay != 0 &&
|
|
strcmp( cur.type, "ApplicationData" ) != 0 &&
|
|
rand() % opt.delay == 0 ) )
|
|
{
|
|
memcpy( &prev, &cur, sizeof( packet ) );
|
|
}
|
|
else
|
|
{
|
|
/* forward and possibly duplicate */
|
|
if( ( ret = send_packet( &cur, "forwarded" ) ) != 0 )
|
|
return( ret );
|
|
|
|
/* send previously delayed message if any */
|
|
if( prev.dst != NULL )
|
|
{
|
|
ret = send_packet( &prev, "delayed" );
|
|
memset( &prev, 0, sizeof( packet ) );
|
|
if( ret != 0 )
|
|
return( ret );
|
|
}
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
int main( int argc, char *argv[] )
|
|
{
|
|
int ret;
|
|
|
|
int listen_fd = -1;
|
|
int client_fd = -1;
|
|
int server_fd = -1;
|
|
|
|
int nb_fds;
|
|
fd_set read_fds;
|
|
|
|
get_options( argc, argv );
|
|
|
|
/*
|
|
* Decisions to drop/delay/duplicate packets are pseudo-random: dropping
|
|
* exactly 1 in N packets would lead to problems when a flight has exactly
|
|
* N packets: the same packet would be dropped on every resend.
|
|
*
|
|
* In order to be able to reproduce problems reliably, the seed may be
|
|
* specified explicitly.
|
|
*/
|
|
if( opt.seed == 0 )
|
|
{
|
|
opt.seed = time( NULL );
|
|
printf( " . Pseudo-random seed: %u\n", opt.seed );
|
|
}
|
|
|
|
srand( opt.seed );
|
|
|
|
/*
|
|
* 0. "Connect" to the server
|
|
*/
|
|
printf( " . Connect to server on UDP/%s/%d ...",
|
|
opt.server_addr, opt.server_port );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = net_connect( &server_fd, opt.server_addr, opt.server_port,
|
|
NET_PROTO_UDP ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! net_connect returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( " ok\n" );
|
|
|
|
/*
|
|
* 1. Setup the "listening" UDP socket
|
|
*/
|
|
printf( " . Bind on UDP/%s/%d ...",
|
|
opt.listen_addr, opt.listen_port );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = net_bind( &listen_fd, opt.listen_addr, opt.listen_port,
|
|
NET_PROTO_UDP ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! net_bind returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( " ok\n" );
|
|
|
|
/*
|
|
* 2. Wait until a client connects
|
|
*/
|
|
accept:
|
|
printf( " . Waiting for a remote connection ..." );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = net_accept( listen_fd, &client_fd, NULL ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! net_accept returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( " ok\n" );
|
|
fflush( stdout );
|
|
|
|
printf( " . Re-bind on UDP/%s/%d ...",
|
|
opt.listen_addr, opt.listen_port );
|
|
fflush( stdout );
|
|
|
|
if( ( ret = net_bind( &listen_fd, opt.listen_addr, opt.listen_port,
|
|
NET_PROTO_UDP ) ) != 0 )
|
|
{
|
|
printf( " failed\n ! net_bind returned %d\n\n", ret );
|
|
goto exit;
|
|
}
|
|
|
|
printf( " ok\n" );
|
|
|
|
/*
|
|
* 3. Forward packets forever (kill the process to terminate it)
|
|
*/
|
|
nb_fds = client_fd;
|
|
if( nb_fds < server_fd )
|
|
nb_fds = server_fd;
|
|
if( nb_fds < listen_fd )
|
|
nb_fds = listen_fd;
|
|
++nb_fds;
|
|
|
|
while( 1 )
|
|
{
|
|
FD_ZERO( &read_fds );
|
|
FD_SET( server_fd, &read_fds );
|
|
FD_SET( client_fd, &read_fds );
|
|
FD_SET( listen_fd, &read_fds );
|
|
|
|
if( ( ret = select( nb_fds, &read_fds, NULL, NULL, NULL ) ) <= 0 )
|
|
{
|
|
perror( "select" );
|
|
goto exit;
|
|
}
|
|
|
|
if( FD_ISSET( listen_fd, &read_fds ) )
|
|
{
|
|
clear_pending();
|
|
goto accept;
|
|
}
|
|
|
|
if( FD_ISSET( client_fd, &read_fds ) )
|
|
{
|
|
if( ( ret = handle_message( "S <- C",
|
|
server_fd, client_fd ) ) != 0 )
|
|
goto exit;
|
|
}
|
|
|
|
if( FD_ISSET( server_fd, &read_fds ) )
|
|
{
|
|
if( ( ret = handle_message( "S -> C",
|
|
client_fd, server_fd ) ) != 0 )
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
exit:
|
|
|
|
#ifdef POLARSSL_ERROR_C
|
|
if( ret != 0 )
|
|
{
|
|
char error_buf[100];
|
|
polarssl_strerror( ret, error_buf, 100 );
|
|
printf( "Last error was: -0x%04X - %s\n\n", - ret, error_buf );
|
|
fflush( stdout );
|
|
}
|
|
#endif
|
|
|
|
if( client_fd != -1 )
|
|
net_close( client_fd );
|
|
|
|
if( listen_fd != -1 )
|
|
net_close( listen_fd );
|
|
|
|
#if defined(_WIN32)
|
|
printf( " Press Enter to exit this program.\n" );
|
|
fflush( stdout ); getchar();
|
|
#endif
|
|
|
|
return( ret != 0 );
|
|
}
|
|
|
|
#endif /* POLARSSL_NET_C */
|