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Send max_fragment_length extension (client)

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Manuel Pégourié-Gonnard 2013-07-16 17:26:28 +02:00
parent 48f8d0dbbd
commit a052849640
1 changed files with 29 additions and 0 deletions
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29
library/ssl_cli.c
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@ -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 )