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Clarify the condition when opening new stream from remote is allowed

This commit is contained in:
Tatsuhiro Tsujikawa 2015-12-11 21:23:49 +09:00
parent ab93db2259
commit 68c5deea5a
1 changed files with 22 additions and 12 deletions
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34
lib/nghttp2_session.c
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@ -1320,6 +1320,15 @@ int nghttp2_session_close_stream_if_shut_rdwr(nghttp2_session *session,
return 0;
}
/*
* Returns nonzero if local endpoint allows reception of new stream
* from remote.
*/
static int session_allow_incoming_new_stream(nghttp2_session *session) {
return (session->goaway_flags &
(NGHTTP2_GOAWAY_TERM_ON_SEND | NGHTTP2_GOAWAY_SENT)) == 0;
}
/*
* This function returns nonzero if session is closing.
*/
@ -3438,17 +3447,17 @@ int nghttp2_session_on_request_headers_received(nghttp2_session *session,
}
session->last_recv_stream_id = frame->hd.stream_id;
if (session->goaway_flags & NGHTTP2_GOAWAY_SENT) {
/* We just ignore stream after GOAWAY was queued */
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
}
if (session_is_incoming_concurrent_streams_max(session)) {
return session_inflate_handle_invalid_connection(
session, frame, NGHTTP2_ERR_PROTO,
"request HEADERS: max concurrent streams exceeded");
}
if (!session_allow_incoming_new_stream(session)) {
/* We just ignore stream after GOAWAY was sent */
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
}
if (frame->headers.pri_spec.stream_id == frame->hd.stream_id) {
return session_inflate_handle_invalid_connection(
session, frame, NGHTTP2_ERR_PROTO, "request HEADERS: depend on itself");
@ -3513,16 +3522,18 @@ int nghttp2_session_on_push_response_headers_received(nghttp2_session *session,
session, frame, NGHTTP2_ERR_PROTO,
"push response HEADERS: stream_id == 0");
}
if (session->goaway_flags) {
/* We don't accept new stream after GOAWAY is sent or received. */
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
}
if (session_is_incoming_concurrent_streams_max(session)) {
return session_inflate_handle_invalid_connection(
session, frame, NGHTTP2_ERR_PROTO,
"push response HEADERS: max concurrent streams exceeded");
}
if (!session_allow_incoming_new_stream(session)) {
/* We don't accept new stream after GOAWAY was sent. */
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
}
if (session_is_incoming_concurrent_streams_pending_max(session)) {
return session_inflate_handle_invalid_stream(session, frame,
NGHTTP2_ERR_REFUSED_STREAM);
@ -4127,9 +4138,8 @@ int nghttp2_session_on_push_promise_received(nghttp2_session *session,
session, frame, NGHTTP2_ERR_PROTO, "PUSH_PROMISE: invalid stream_id");
}
if (session->goaway_flags) {
/* We just dicard PUSH_PROMISE after GOAWAY is sent or
received. */
if (!session_allow_incoming_new_stream(session)) {
/* We just discard PUSH_PROMISE after GOAWAY was sent */
return NGHTTP2_ERR_IGN_HEADER_BLOCK;
}