From a05284964066af1d60d77e3c82733204930f878d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Manuel=20P=C3=A9gouri=C3=A9-Gonnard?= Date: Tue, 16 Jul 2013 17:26:28 +0200 Subject: [PATCH] Send max_fragment_length extension (client) --- library/ssl_cli.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/library/ssl_cli.c b/library/ssl_cli.c index aeba799cb..9dbf4e603 100644 --- a/library/ssl_cli.c +++ b/library/ssl_cli.c @@ -269,6 +269,30 @@ static void ssl_write_supported_point_formats_ext( ssl_context *ssl, } #endif +static void ssl_write_max_fragment_length_ext( ssl_context *ssl, + unsigned char *buf, + size_t *olen ) +{ + unsigned char *p = buf; + + if( ssl->mfl_code == SSL_MAX_FRAG_LEN_NONE ) { + *olen = 0; + return; + } + + SSL_DEBUG_MSG( 3, ( "client hello, adding max_fragment_length extension" ) ); + + *p++ = (unsigned char)( ( TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF ); + *p++ = (unsigned char)( ( TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF ); + + *p++ = 0x00; + *p++ = 1; + + *p++ = ssl->mfl_code; + + *olen = 5; +} + static int ssl_write_client_hello( ssl_context *ssl ) { int ret; @@ -436,6 +460,9 @@ static int ssl_write_client_hello( ssl_context *ssl ) ext_len += olen; #endif + ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen ); + ext_len += olen; + SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d", ext_len ) ); @@ -690,6 +717,8 @@ static int ssl_parse_server_hello( ssl_context *ssl ) ext = buf + 44 + n; + SSL_DEBUG_MSG( 2, ( "server hello, total extension length: %d", ext_len ) ); + while( ext_len ) { unsigned int ext_id = ( ( ext[0] << 8 )