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Refactor storage of settings 

Now local and remote settings values are stored in dedicated structure
nghttp2_settings_storage.
This commit is contained in:
Tatsuhiro Tsujikawa 2014-06-10 21:29:19 +09:00
parent 4596f73ee0
commit 2878e1e258
4 changed files with 139 additions and 88 deletions
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6
lib/includes/nghttp2/nghttp2.h
View File

@ -519,10 +519,6 @@ typedef enum {
* SETTINGS_INITIAL_WINDOW_SIZE
*/
NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE = 4,
/**
* Maximum ID of :type:`nghttp2_settings_id`.
*/
NGHTTP2_SETTINGS_MAX = 4
} nghttp2_settings_id;
/**
@ -2030,6 +2026,8 @@ int nghttp2_session_terminate_session(nghttp2_session *session,
* @function
*
* Returns the value of SETTINGS |id| notified by a remote endpoint.
* The |id| must be one of values defined in
* :enum:`nghttp2_settings_id`.
*/
uint32_t nghttp2_session_get_remote_settings(nghttp2_session *session,
nghttp2_settings_id id);

143
lib/nghttp2_session.c
View File

@ -37,24 +37,24 @@
/*
* Returns non-zero if the number of outgoing opened streams is larger
* than or equal to
* remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS].
* remote_settings.max_concurrent_streams.
*/
static int session_is_outgoing_concurrent_streams_max
(nghttp2_session *session)
{
return session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]
return session->remote_settings.max_concurrent_streams
<= session->num_outgoing_streams;
}
/*
* Returns non-zero if the number of incoming opened streams is larger
* than or equal to
* local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS].
* local_settings.max_concurrent_streams.
*/
static int session_is_incoming_concurrent_streams_max
(nghttp2_session *session)
{
return session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]
return session->local_settings.max_concurrent_streams
<= session->num_incoming_streams;
}
@ -255,15 +255,12 @@ static void session_inbound_frame_reset(nghttp2_session *session)
iframe->padlen = 0;
}
static void init_settings(uint32_t *settings)
static void init_settings(nghttp2_settings_storage *settings)
{
settings[NGHTTP2_SETTINGS_HEADER_TABLE_SIZE] =
NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE;
settings[NGHTTP2_SETTINGS_ENABLE_PUSH] = 1;
settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] =
NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE] =
NGHTTP2_INITIAL_WINDOW_SIZE;
settings->header_table_size = NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE;
settings->enable_push = 1;
settings->max_concurrent_streams = NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
settings->initial_window_size = NGHTTP2_INITIAL_WINDOW_SIZE;
}
static void active_outbound_item_reset(nghttp2_active_outbound_item *aob)
@ -348,8 +345,8 @@ static int session_new(nghttp2_session **session_ptr,
active_outbound_item_reset(&(*session_ptr)->aob);
init_settings((*session_ptr)->remote_settings);
init_settings((*session_ptr)->local_settings);
init_settings(&(*session_ptr)->remote_settings);
init_settings(&(*session_ptr)->local_settings);
if(option) {
@ -371,8 +368,7 @@ static int session_new(nghttp2_session **session_ptr,
if(option->opt_set_mask & NGHTTP2_OPT_PEER_MAX_CONCURRENT_STREAMS) {
(*session_ptr)->
remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] =
(*session_ptr)->remote_settings.max_concurrent_streams =
option->peer_max_concurrent_streams;
}
@ -730,10 +726,8 @@ nghttp2_stream* nghttp2_session_open_stream(nghttp2_session *session,
nghttp2_stream_init(stream, stream_id, flags, initial_state,
pri_spec->weight, &session->roots,
session->remote_settings
[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE],
session->local_settings
[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE],
session->remote_settings.initial_window_size,
session->local_settings.initial_window_size,
stream_user_data);
rv = nghttp2_map_insert(&session->streams, &stream->map_entry);
@ -920,9 +914,7 @@ void nghttp2_session_adjust_closed_stream(nghttp2_session *session,
{
size_t num_stream_max;
num_stream_max =
nghttp2_min
(session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS],
num_stream_max = nghttp2_min(session->local_settings.max_concurrent_streams,
session->pending_local_max_concurrent_stream);
DEBUGF(fprintf(stderr, "stream: adjusting kept closed streams "
@ -1206,7 +1198,7 @@ static int session_predicate_push_promise_send
if(rv != 0) {
return rv;
}
if(session->remote_settings[NGHTTP2_SETTINGS_ENABLE_PUSH] == 0) {
if(session->remote_settings.enable_push == 0) {
return NGHTTP2_ERR_PUSH_DISABLED;
}
if(stream->state == NGHTTP2_STREAM_CLOSING) {
@ -3212,10 +3204,11 @@ static int session_update_remote_initial_window_size
int32_t new_initial_window_size)
{
nghttp2_update_window_size_arg arg;
arg.session = session;
arg.new_window_size = new_initial_window_size;
arg.old_window_size =
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE];
arg.old_window_size = session->remote_settings.initial_window_size;
return nghttp2_map_each(&session->streams,
update_remote_initial_window_size_func,
&arg);
@ -3322,18 +3315,32 @@ int nghttp2_session_update_local_settings(nghttp2_session *session,
rv = session_update_local_initial_window_size
(session,
new_initial_window_size,
session->local_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
session->local_settings.initial_window_size);
if(rv != 0) {
return rv;
}
}
for(i = 0; i < niv; ++i) {
if(iv[i].settings_id > 0 && iv[i].settings_id <= NGHTTP2_SETTINGS_MAX) {
session->local_settings[iv[i].settings_id] = iv[i].value;
switch(iv[i].settings_id) {
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
session->local_settings.header_table_size = iv[i].value;
break;
case NGHTTP2_SETTINGS_ENABLE_PUSH:
session->local_settings.enable_push = iv[i].value;
break;
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
session->local_settings.max_concurrent_streams = iv[i].value;
break;
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
session->local_settings.initial_window_size = iv[i].value;
break;
}
}
session->pending_local_max_concurrent_stream =
NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
return 0;
}
@ -3343,7 +3350,11 @@ int nghttp2_session_on_settings_received(nghttp2_session *session,
{
int rv;
int i;
int check[NGHTTP2_SETTINGS_MAX+1];
int header_table_size_seen = 0;
int enable_push_seen = 0;
int max_concurrent_streams_seen = 0;
int initial_window_size_seen = 0;
if(frame->hd.stream_id != 0) {
return session_handle_invalid_connection(session, frame,
NGHTTP2_PROTOCOL_ERROR);
@ -3374,25 +3385,27 @@ int nghttp2_session_on_settings_received(nghttp2_session *session,
}
return session_call_on_frame_received(session, frame);
}
/* Check ID/value pairs and persist them if necessary. */
memset(check, 0, sizeof(check));
for(i = (int)frame->settings.niv - 1; i >= 0; --i) {
nghttp2_settings_entry *entry = &frame->settings.iv[i];
/* The spec says the settings values are processed in the order
they appear in the payload. In other words, if the multiple
values for the same ID were found, use the last one and ignore
the rest. */
if(entry->settings_id > NGHTTP2_SETTINGS_MAX || entry->settings_id <= 0 ||
check[entry->settings_id] == 1) {
continue;
}
check[entry->settings_id] = 1;
switch(entry->settings_id) {
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
if(header_table_size_seen) {
break;
}
header_table_size_seen = 1;
if(entry->value > NGHTTP2_MAX_HEADER_TABLE_SIZE) {
return session_handle_invalid_connection
(session, frame, NGHTTP2_COMPRESSION_ERROR);
}
rv = nghttp2_hd_deflate_change_table_size(&session->hd_deflater,
entry->value);
if(rv != 0) {
@ -3403,46 +3416,84 @@ int nghttp2_session_on_settings_received(nghttp2_session *session,
(session, frame, NGHTTP2_COMPRESSION_ERROR);
}
}
session->remote_settings.header_table_size = entry->value;
break;
case NGHTTP2_SETTINGS_ENABLE_PUSH:
if(enable_push_seen) {
break;
}
enable_push_seen = 1;
if(entry->value != 0 && entry->value != 1) {
return session_handle_invalid_connection
(session, frame, NGHTTP2_PROTOCOL_ERROR);
}
if(!session->server && entry->value != 0) {
return session_handle_invalid_connection
(session, frame, NGHTTP2_PROTOCOL_ERROR);
}
session->remote_settings.enable_push = entry->value;
break;
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
if(max_concurrent_streams_seen) {
break;
}
max_concurrent_streams_seen = 1;
session->remote_settings.max_concurrent_streams = entry->value;
break;
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
if(initial_window_size_seen) {
break;
}
initial_window_size_seen = 1;
/* Update the initial window size of the all active streams */
/* Check that initial_window_size < (1u << 31) */
if(entry->value > NGHTTP2_MAX_WINDOW_SIZE) {
return session_handle_invalid_connection
(session, frame, NGHTTP2_FLOW_CONTROL_ERROR);
}
rv = session_update_remote_initial_window_size(session, entry->value);
if(nghttp2_is_fatal(rv)) {
return rv;
}
if(rv != 0) {
return session_handle_invalid_connection
(session, frame, NGHTTP2_FLOW_CONTROL_ERROR);
}
session->remote_settings.initial_window_size = entry->value;
break;
}
session->remote_settings[entry->settings_id] = entry->value;
}
if(!noack) {
rv = nghttp2_session_add_settings(session, NGHTTP2_FLAG_ACK, NULL, 0);
if(rv != 0) {
if(nghttp2_is_fatal(rv)) {
return rv;
}
return session_handle_invalid_connection
(session, frame, NGHTTP2_INTERNAL_ERROR);
}
}
return session_call_on_frame_received(session, frame);
}
@ -3473,8 +3524,7 @@ int nghttp2_session_on_push_promise_received(nghttp2_session *session,
return session_inflate_handle_invalid_connection
(session, frame, NGHTTP2_PROTOCOL_ERROR);
}
if(session->server ||
session->local_settings[NGHTTP2_SETTINGS_ENABLE_PUSH] == 0) {
if(session->server || session->local_settings.enable_push == 0) {
return session_inflate_handle_invalid_connection
(session, frame, NGHTTP2_PROTOCOL_ERROR);
}
@ -5580,11 +5630,18 @@ int32_t nghttp2_session_get_stream_remote_window_size(nghttp2_session* session,
uint32_t nghttp2_session_get_remote_settings(nghttp2_session *session,
nghttp2_settings_id id)
{
if(id > NGHTTP2_SETTINGS_MAX) {
return 0;
switch(id) {
case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
return session->remote_settings.header_table_size;
case NGHTTP2_SETTINGS_ENABLE_PUSH:
return session->remote_settings.enable_push;
case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
return session->remote_settings.max_concurrent_streams;
case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
return session->remote_settings.initial_window_size;
}
return session->remote_settings[id];
assert(0);
}
int nghttp2_session_upgrade(nghttp2_session *session,

15
lib/nghttp2_session.h
View File

@ -106,6 +106,13 @@ typedef struct {
uint8_t raw_sbuf[8];
} nghttp2_inbound_frame;
typedef struct {
uint32_t header_table_size;
uint32_t enable_push;
uint32_t max_concurrent_streams;
uint32_t initial_window_size;
} nghttp2_settings_storage;
typedef enum {
NGHTTP2_GOAWAY_NONE = 0,
/* Flag means GOAWAY frame is sent to the remote peer. */
@ -159,10 +166,10 @@ struct nghttp2_session {
in-flight SETTINGS. */
ssize_t inflight_niv;
/* The number of outgoing streams. This will be capped by
remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]. */
remote_settings.max_concurrent_streams. */
size_t num_outgoing_streams;
/* The number of incoming streams. This will be capped by
local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]. */
local_settings.max_concurrent_streams. */
size_t num_incoming_streams;
/* The number of closed streams still kept in |streams| hash. The
closed streams can be accessed through single linked list
@ -201,9 +208,9 @@ struct nghttp2_session {
int32_t local_window_size;
/* Settings value received from the remote endpoint. We just use ID
as index. The index = 0 is unused. */
uint32_t remote_settings[NGHTTP2_SETTINGS_MAX+1];
nghttp2_settings_storage remote_settings;
/* Settings value of the local endpoint. */
uint32_t local_settings[NGHTTP2_SETTINGS_MAX+1];
nghttp2_settings_storage local_settings;
/* Option flags. This is bitwise-OR of 0 or more of nghttp2_optmask. */
uint32_t opt_flags;
/* Unacked local SETTINGS_MAX_CONCURRENT_STREAMS value. We use this

59
tests/nghttp2_session_test.c
View File

@ -1514,7 +1514,7 @@ void test_nghttp2_session_on_request_headers_received(void)
CU_ASSERT(0 == (session->goaway_flags & NGHTTP2_GOAWAY_FAIL_ON_SEND));
nghttp2_frame_headers_free(&frame.headers);
session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] =
session->local_settings.max_concurrent_streams =
NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS;
/* Stream ID less than or equal to the previouly received request
@ -1706,7 +1706,7 @@ void test_nghttp2_session_on_push_response_headers_received(void)
/* If ACKed max concurrent streams limit is exceeded, GOAWAY is
issued */
session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 1;
session->local_settings.max_concurrent_streams = 1;
stream = nghttp2_session_open_stream(session, 6, NGHTTP2_STREAM_FLAG_NONE,
&pri_spec_default,
@ -1874,7 +1874,7 @@ void test_nghttp2_session_on_settings_received(void)
memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
nghttp2_session_client_new(&session, &callbacks, &user_data);
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE] = 16*1024;
session->remote_settings.initial_window_size = 16*1024;
stream1 = nghttp2_session_open_stream(session, 1, NGHTTP2_STREAM_FLAG_NONE,
&pri_spec_default,
@ -1891,14 +1891,10 @@ void test_nghttp2_session_on_settings_received(void)
dup_iv(iv, niv), niv);
CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &frame, 0));
CU_ASSERT(1000000009 ==
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]);
CU_ASSERT(64*1024 ==
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
CU_ASSERT(1024 ==
session->remote_settings[NGHTTP2_SETTINGS_HEADER_TABLE_SIZE]);
CU_ASSERT(0 ==
session->remote_settings[NGHTTP2_SETTINGS_ENABLE_PUSH]);
CU_ASSERT(1000000009 == session->remote_settings.max_concurrent_streams);
CU_ASSERT(64*1024 == session->remote_settings.initial_window_size);
CU_ASSERT(1024 == session->remote_settings.header_table_size);
CU_ASSERT(0 == session->remote_settings.enable_push);
CU_ASSERT(64*1024 == stream1->remote_window_size);
CU_ASSERT(0 == stream2->remote_window_size);
@ -2102,7 +2098,7 @@ void test_nghttp2_session_on_push_promise_received(void)
&pri_spec_default,
NGHTTP2_STREAM_OPENING, NULL);
session->local_settings[NGHTTP2_SETTINGS_ENABLE_PUSH] = 0;
session->local_settings.enable_push = 0;
nghttp2_frame_push_promise_init(&frame.push_promise,
NGHTTP2_FLAG_END_HEADERS, 1, 2,
@ -2616,10 +2612,8 @@ void test_nghttp2_session_upgrade(void)
CU_ASSERT(NULL == stream->stream_user_data);
CU_ASSERT(NGHTTP2_SHUT_RD == stream->shut_flags);
CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
CU_ASSERT(1 ==
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]);
CU_ASSERT(4095 ==
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
CU_ASSERT(1 == session->remote_settings.max_concurrent_streams);
CU_ASSERT(4095 == session->remote_settings.initial_window_size);
/* Call nghttp2_session_upgrade() again is error */
CU_ASSERT(NGHTTP2_ERR_PROTO == nghttp2_session_upgrade(session,
settings_payload,
@ -3240,9 +3234,9 @@ void test_nghttp2_submit_settings(void)
/* Make sure that local settings are not changed */
CU_ASSERT(NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS ==
session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]);
session->local_settings.max_concurrent_streams);
CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
session->local_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
session->local_settings.initial_window_size);
/* Now sends without 5th one */
CU_ASSERT(0 == nghttp2_submit_settings(session, NGHTTP2_FLAG_NONE, iv, 4));
@ -3271,11 +3265,9 @@ void test_nghttp2_submit_settings(void)
CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
nghttp2_frame_settings_free(&ack_frame.settings);
CU_ASSERT(16*1024 ==
session->local_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]);
CU_ASSERT(16*1024 == session->local_settings.initial_window_size);
CU_ASSERT(0 == session->hd_inflater.ctx.hd_table_bufsize_max);
CU_ASSERT(50 ==
session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]);
CU_ASSERT(50 == session->local_settings.max_concurrent_streams);
CU_ASSERT(NGHTTP2_INITIAL_MAX_CONCURRENT_STREAMS ==
session->pending_local_max_concurrent_stream);
@ -3716,7 +3708,7 @@ void test_nghttp2_session_get_next_ob_item(void)
callbacks.send_callback = null_send_callback;
nghttp2_session_server_new(&session, &callbacks, NULL);
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 2;
session->remote_settings.max_concurrent_streams = 2;
CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
nghttp2_submit_ping(session, NGHTTP2_FLAG_NONE, NULL);
@ -3746,7 +3738,7 @@ void test_nghttp2_session_get_next_ob_item(void)
nghttp2_submit_request(session, &pri_spec, NULL, 0, NULL, NULL);
CU_ASSERT(NULL == nghttp2_session_get_next_ob_item(session));
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 3;
session->remote_settings.max_concurrent_streams = 3;
CU_ASSERT(NGHTTP2_HEADERS ==
OB_CTRL_TYPE(nghttp2_session_get_next_ob_item(session)));
@ -3765,7 +3757,7 @@ void test_nghttp2_session_pop_next_ob_item(void)
callbacks.send_callback = null_send_callback;
nghttp2_session_server_new(&session, &callbacks, NULL);
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 1;
session->remote_settings.max_concurrent_streams = 1;
CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
@ -3808,7 +3800,7 @@ void test_nghttp2_session_pop_next_ob_item(void)
CU_ASSERT(NULL == nghttp2_session_pop_next_ob_item(session));
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 2;
session->remote_settings.max_concurrent_streams = 2;
item = nghttp2_session_pop_next_ob_item(session);
CU_ASSERT(NGHTTP2_HEADERS == OB_CTRL_TYPE(item));
@ -3819,7 +3811,7 @@ void test_nghttp2_session_pop_next_ob_item(void)
/* Check that push reply HEADERS are queued into ob_ss_pq */
nghttp2_session_server_new(&session, &callbacks, NULL);
session->remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 0;
session->remote_settings.max_concurrent_streams = 0;
nghttp2_session_open_stream(session, 2, NGHTTP2_STREAM_FLAG_NONE,
&pri_spec_default, NGHTTP2_STREAM_RESERVED,
NULL);
@ -3882,7 +3874,7 @@ void test_nghttp2_session_max_concurrent_streams(void)
CU_ASSERT(0 == nghttp2_session_send(session));
/* Check ACKed SETTINGS_MAX_CONCURRENT_STREAMS */
session->local_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS] = 1;
session->local_settings.max_concurrent_streams = 1;
frame.hd.stream_id = 5;
CU_ASSERT(NGHTTP2_ERR_IGN_HEADER_BLOCK ==
@ -4067,7 +4059,7 @@ void test_nghttp2_session_flow_control(void)
nghttp2_session_client_new(&session, &callbacks, &ud);
/* Change it to 64KiB for easy calculation */
session->remote_window_size = 64*1024;
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE] = 64*1024;
session->remote_settings.initial_window_size = 64*1024;
nghttp2_submit_request(session, NULL, NULL, 0, &data_prd, NULL);
@ -4097,10 +4089,9 @@ void test_nghttp2_session_flow_control(void)
negative. */
new_initial_window_size = 16*1024;
stream->remote_window_size = new_initial_window_size-
(session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]
(session->remote_settings.initial_window_size
- stream->remote_window_size);
session->remote_settings[NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE] =
new_initial_window_size;
session->remote_settings.initial_window_size = new_initial_window_size;
CU_ASSERT(-48*1024 == stream->remote_window_size);
/* Back 48KiB to stream window */
@ -4565,9 +4556,7 @@ void test_nghttp2_session_set_option(void)
nghttp2_session_client_new2(&session, &callbacks, NULL, option);
CU_ASSERT(100 ==
session->
remote_settings[NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS]);
CU_ASSERT(100 == session->remote_settings.max_concurrent_streams);
nghttp2_session_del(session);
nghttp2_option_del(option);