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Add nghttp2_session_consume() API

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Reworked no automatic WINDOW_UPDATE feature.  We added new API
nghttp2_session_consume() which tells the library how many bytes are
consumed by the application.  Instead of submitting WINDOW_UPDATE by
the application, the library is now responsible to submit
WINDOW_UPDATE based on consumed bytes.  This is more reliable method,
since it enables us to properly send WINDOW_UPDATE for stream and
connection individually.  The previous implementation of nghttpx had
broken connection window management.
This commit is contained in:
Tatsuhiro Tsujikawa
2014-07-25 21:26:03 +09:00
parent 9f17bee51d
commit 079db14d45
18 changed files with 395 additions and 276 deletions
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16
lib/nghttp2_session.h
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@@ -43,8 +43,7 @@
* Option flags.
*/
typedef enum {
NGHTTP2_OPTMASK_NO_AUTO_STREAM_WINDOW_UPDATE = 1 << 0,
NGHTTP2_OPTMASK_NO_AUTO_CONNECTION_WINDOW_UPDATE = 1 << 1
NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE = 1 << 0,
} nghttp2_optmask;
typedef enum {
@@ -206,15 +205,10 @@ struct nghttp2_session {
WINDOW_UPDATE. This could be negative after submitting negative
value to WINDOW_UPDATE. */
int32_t recv_window_size;
/* The number of bytes in ignored DATA frame received without
connection-level WINDOW_UPDATE. Since we do not call
on_data_chunk_recv_callback for ignored DATA chunk, if
nghttp2_option_set_no_auto_connection_window_update is used,
application may not have a chance to send connection
WINDOW_UPDATE. To fix this, we accumulate those received bytes,
and if it exceeds certain number, we automatically send
connection-level WINDOW_UPDATE. */
int32_t recv_ign_window_size;
/* The number of bytes consumed by the application and now is
subject to WINDOW_UPDATE. This is only used when auto
WINDOW_UPDATE is turned off. */
int32_t consumed_size;
/* The amount of recv_window_size cut using submitting negative
value to WINDOW_UPDATE */
int32_t recv_reduction;