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Add option reconnect_hard to ssl_client2

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- interrupt the connection abruptly (no close_notify)
- reconnect from the same port while server sill has an active connection from
  this port.

Some real-world clients do that, see section 4.2.8 of RFC 6347.
This commit is contained in:
Manuel Pégourié-Gonnard 2015-09-04 10:20:17 +02:00
parent 14d800507a
commit dbd23079d0
1 changed files with 43 additions and 2 deletions
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45
programs/ssl/ssl_client2.c
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@ -90,6 +90,7 @@ int main( void )
#define DFL_DHMLEN -1
#define DFL_RECONNECT 0
#define DFL_RECO_DELAY 0
#define DFL_RECONNECT_HARD 0
#define DFL_TICKETS MBEDTLS_SSL_SESSION_TICKETS_ENABLED
#define DFL_ALPN_STRING NULL
#define DFL_TRANSPORT MBEDTLS_SSL_TRANSPORT_STREAM
@ -238,6 +239,7 @@ int main( void )
" exchanges=%%d default: 1\n" \
" reconnect=%%d default: 0 (disabled)\n" \
" reco_delay=%%d default: 0 seconds\n" \
" reconnect_hard=%%d default: 0 (disabled)\n" \
USAGE_TICKETS \
USAGE_MAX_FRAG_LEN \
USAGE_TRUNC_HMAC \
@ -293,6 +295,7 @@ struct options
int dhmlen; /* minimum DHM params len in bits */
int reconnect; /* attempt to resume session */
int reco_delay; /* delay in seconds before resuming session */
int reconnect_hard; /* unexpectedly reconnect from the same port */
int tickets; /* enable / disable session tickets */
const char *alpn_string; /* ALPN supported protocols */
int transport; /* TLS or DTLS? */
@ -481,6 +484,7 @@ int main( int argc, char *argv[] )
opt.dhmlen = DFL_DHMLEN;
opt.reconnect = DFL_RECONNECT;
opt.reco_delay = DFL_RECO_DELAY;
opt.reconnect_hard = DFL_RECONNECT_HARD;
opt.tickets = DFL_TICKETS;
opt.alpn_string = DFL_ALPN_STRING;
opt.transport = DFL_TRANSPORT;
@ -603,6 +607,12 @@ int main( int argc, char *argv[] )
if( opt.reco_delay < 0 )
goto usage;
}
else if( strcmp( p, "reconnect_hard" ) == 0 )
{
opt.reconnect_hard = atoi( q );
if( opt.reconnect_hard < 0 || opt.reconnect_hard > 1 )
goto usage;
}
else if( strcmp( p, "tickets" ) == 0 )
{
opt.tickets = atoi( q );
@ -1479,7 +1489,38 @@ send_request:
}
/*
* 7b. Continue doing data exchanges?
* 7b. Simulate hard reset and reconnect from same port?
*/
if( opt.reconnect_hard != 0 )
{
opt.reconnect_hard = 0;
mbedtls_printf( " . Restarting connection from same port..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_session_reset( &ssl ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_session_reset returned -0x%x\n\n", -ret );
goto exit;
}
while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
{
if( ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );
goto exit;
}
}
mbedtls_printf( " ok\n" );
goto send_request;
}
/*
* 7c. Continue doing data exchanges?
*/
if( --opt.exchanges > 0 )
goto send_request;
@ -1489,6 +1530,7 @@ send_request:
*/
close_notify:
mbedtls_printf( " . Closing the connection..." );
fflush( stdout );
/* No error checking, the connection might be closed already */
do ret = mbedtls_ssl_close_notify( &ssl );
@ -1513,7 +1555,6 @@ reconnect:
#endif
mbedtls_printf( " . Reconnecting with saved session..." );
fflush( stdout );
if( ( ret = mbedtls_ssl_session_reset( &ssl ) ) != 0 )
{