Add nghttp2_session_get_local_settings() API function

doc/Makefile.am

@@ -108,6 +108,7 @@ APIDOCS= \
 	nghttp2_session_get_effective_local_window_size.rst \
 	nghttp2_session_get_effective_recv_data_length.rst \
 	nghttp2_session_get_last_proc_stream_id.rst \
+	nghttp2_session_get_local_settings.rst \
 	nghttp2_session_get_local_window_size.rst \
 	nghttp2_session_get_next_stream_id.rst \
 	nghttp2_session_get_outbound_queue_size.rst \

lib/includes/nghttp2/nghttp2.h

@@ -3242,6 +3242,17 @@ NGHTTP2_EXTERN uint32_t
 nghttp2_session_get_remote_settings(nghttp2_session *session,
                                     nghttp2_settings_id id);
 
+/**
+ * @function
+ *
+ * Returns the value of SETTINGS |id| of local endpoint acknowledged
+ * by the remote endpoint.  The |id| must be one of the values defined
+ * in :enum:`nghttp2_settings_id`.
+ */
+NGHTTP2_EXTERN uint32_t
+nghttp2_session_get_local_settings(nghttp2_session *session,
+                                   nghttp2_settings_id id);
+
 /**
  * @function
  *

lib/nghttp2_session.c

@@ -7237,6 +7237,26 @@ uint32_t nghttp2_session_get_remote_settings(nghttp2_session *session,
   assert(0);
 }
 
+uint32_t nghttp2_session_get_local_settings(nghttp2_session *session,
+                                            nghttp2_settings_id id) {
+  switch (id) {
+  case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
+    return session->local_settings.header_table_size;
+  case NGHTTP2_SETTINGS_ENABLE_PUSH:
+    return session->local_settings.enable_push;
+  case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
+    return session->local_settings.max_concurrent_streams;
+  case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
+    return session->local_settings.initial_window_size;
+  case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
+    return session->local_settings.max_frame_size;
+  case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
+    return session->local_settings.max_header_list_size;
+  }
+
+  assert(0);
+}
+
 static int nghttp2_session_upgrade_internal(nghttp2_session *session,
                                             const uint8_t *settings_payload,
                                             size_t settings_payloadlen,

tests/nghttp2_session_test.c

@@ -5112,6 +5112,15 @@ void test_nghttp2_submit_settings(void) {
 
   CU_ASSERT(50 == session->pending_local_max_concurrent_stream);
 
+  /* before receiving SETTINGS ACK, local settings have still default
+     values */
+  CU_ASSERT(NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS ==
+            nghttp2_session_get_local_settings(
+                session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS));
+  CU_ASSERT(NGHTTP2_INITIAL_WINDOW_SIZE ==
+            nghttp2_session_get_local_settings(
+                session, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE));
+
   nghttp2_frame_settings_init(&ack_frame.settings, NGHTTP2_FLAG_ACK, NULL, 0);
   CU_ASSERT(0 == nghttp2_session_on_settings_received(session, &ack_frame, 0));
   nghttp2_frame_settings_free(&ack_frame.settings, mem);
@@ -5120,6 +5129,12 @@ void test_nghttp2_submit_settings(void) {
   CU_ASSERT(1023 == session->hd_inflater.ctx.hd_table_bufsize_max);
   CU_ASSERT(111 == session->hd_inflater.min_hd_table_bufsize_max);
   CU_ASSERT(50 == session->local_settings.max_concurrent_streams);
+
+  CU_ASSERT(50 == nghttp2_session_get_local_settings(
+                      session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS));
+  CU_ASSERT(16 * 1024 == nghttp2_session_get_local_settings(
+                             session, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE));
+
   /* We just keep the last seen value */
   CU_ASSERT(50 == session->pending_local_max_concurrent_stream);