/**
* Parse a SYN_STREAM control frame.
* Parses the header of a SYN_STREAM control frame and extracts the
* NV block.
* @param syn_stream - Destination frame.
* @param hash - Streamid lookup
* @param data - Data to parse.
* @param frame_length - Length of the frame.
* @see spdy_control_frame
* @see SPDY_SYN_STREAM_MIN_LENGTH
* @return 0 on success, -1 on failure.
*/
int spdy_syn_stream_parse(spdy_syn_stream *syn_stream,
struct spindly_phys *phys,
spdy_data *data,
uint32_t frame_length)
{
int ret;
size_t length = data->data_end - data->cursor;
struct hashnode *hn;
assert(phys != NULL);
if(length < frame_length) {
data->needed = frame_length - length;
SPDYDEBUG("Not enough data for parsing the stream.");
return SPDY_ERROR_INSUFFICIENT_DATA;
}
/* TODO: Optimize the double length check away. */
if(length < SPDY_SYN_STREAM_MIN_LENGTH) {
data->needed = SPDY_SYN_STREAM_MIN_LENGTH - length;
SPDYDEBUG("Not enough data for parsing the stream.");
return SPDY_ERROR_INSUFFICIENT_DATA;
}
/* Parse the frame header. */
ret = spdy_syn_stream_parse_header(syn_stream, data);
if(ret) {
SPDYDEBUG("Failed to parse header.");
return ret;
}
/* make sure the incoming streamid isn't already used */
hn = _spindly_hash_get(&phys->streamhash, syn_stream->stream_id);
if(hn) {
SPDYDEBUG("Got a SPDY_STREAM with an exiting id!");
return SPDY_ERROR_INVALID_DATA;
}
/* Init NV block. */
ret = spdy_nv_block_init(&syn_stream->nv_block);
if(ret)
return ret;
/* Parse NV block. */
ret = spdy_nv_block_inflate_parse(&syn_stream->nv_block,
data->cursor,
frame_length,
&phys->zlib_in);
if(ret) {
/* Clean up. */
SPDYDEBUG("Failed to parse NV block.");
return ret;
}
data->cursor += frame_length - SPDY_SYN_STREAM_HEADER_MIN_LENGTH;
return SPDY_ERROR_NONE;
}
/**
* Parse a SYN_STREAM control frame.
* Parses the header of a SYN_STREAM control frame and extracts the
* NV block.
* @param syn_stream - Destination frame.
* @param data - Data to parse.
* @param frame_length - Length of the frame.
* @param zlib_ctx - The zlib context to use.
* @see spdy_control_frame
* @see SPDY_SYN_STREAM_MIN_LENGTH
* @return 0 on success, -1 on failure.
*/
int spdy_syn_stream_parse(spdy_syn_stream *syn_stream,
spdy_data *data,
uint32_t frame_length, spdy_zlib_context *zlib_ctx)
{
int ret;
size_t length = data->data_end - data->cursor;
if(length < frame_length) {
data->needed = frame_length - length;
SPDYDEBUG("Not enough data for parsing the stream.");
return SPDY_ERROR_INSUFFICIENT_DATA;
}
/* TODO: Optimize the double length check away. */
if(length < SPDY_SYN_STREAM_MIN_LENGTH) {
data->needed = SPDY_SYN_STREAM_MIN_LENGTH - length;
SPDYDEBUG("Not enough data for parsing the stream.");
return SPDY_ERROR_INSUFFICIENT_DATA;
}
/* Parse the frame header. */
if((ret = spdy_syn_stream_parse_header(syn_stream, data)) != SPDY_ERROR_NONE) {
SPDYDEBUG("Failed to parse header.");
return ret;
}
/* Init NV block. */
ret = spdy_nv_block_init(&syn_stream->nv_block);
if(ret) {
return ret;
}
/* Parse NV block. */
if((ret = spdy_nv_block_inflate_parse(&syn_stream->nv_block,
data->cursor,
frame_length,
zlib_ctx)) != SPDY_ERROR_NONE) {
/* Clean up. */
SPDYDEBUG("Failed to parse NV block.");
return ret;
}
data->cursor += frame_length - SPDY_SYN_STREAM_HEADER_MIN_LENGTH;
return SPDY_ERROR_NONE;
}