altsvc: Add tests, ignore altsvc if stream does not exist

lib/nghttp2_session.c

@@ -4663,6 +4663,7 @@ static int session_process_window_update_frame(nghttp2_session *session) {
 int nghttp2_session_on_altsvc_received(nghttp2_session *session,
                                        nghttp2_frame *frame) {
   nghttp2_ext_altsvc *altsvc;
+  nghttp2_stream *stream;
 
   altsvc = frame->ext.payload;
 
@@ -4672,8 +4673,19 @@ int nghttp2_session_on_altsvc_received(nghttp2_session *session,
     if (altsvc->origin_len == 0) {
       return 0;
     }
-  } else if (altsvc->origin_len > 0) {
-    return 0;
+  } else {
+    if (altsvc->origin_len > 0) {
+      return 0;
+    }
+
+    stream = nghttp2_session_get_stream(session, frame->hd.stream_id);
+    if (!stream) {
+      return 0;
+    }
+
+    if (stream->state == NGHTTP2_STREAM_CLOSING) {
+      return 0;
+    }
   }
 
   return session_call_on_frame_received(session, frame);

tests/main.c

@@ -103,6 +103,8 @@ int main(int argc _U_, char *argv[] _U_) {
                    test_nghttp2_session_recv_too_large_frame_length) ||
       !CU_add_test(pSuite, "session_recv_extension",
                    test_nghttp2_session_recv_extension) ||
+      !CU_add_test(pSuite, "session_recv_altsvc",
+                   test_nghttp2_session_recv_altsvc) ||
       !CU_add_test(pSuite, "session_continue", test_nghttp2_session_continue) ||
       !CU_add_test(pSuite, "session_add_frame",
                    test_nghttp2_session_add_frame) ||
@@ -132,6 +134,8 @@ int main(int argc _U_, char *argv[] _U_) {
                    test_nghttp2_session_on_data_received) ||
       !CU_add_test(pSuite, "session_on_data_received_fail_fast",
                    test_nghttp2_session_on_data_received_fail_fast) ||
+      !CU_add_test(pSuite, "session_on_altsvc_received",
+                   test_nghttp2_session_on_altsvc_received) ||
       !CU_add_test(pSuite, "session_send_headers_start_stream",
                    test_nghttp2_session_send_headers_start_stream) ||
       !CU_add_test(pSuite, "session_send_headers_reply",

tests/nghttp2_session_test.c

@@ -1955,6 +1955,124 @@ void test_nghttp2_session_recv_extension(void) {
   nghttp2_option_del(option);
 }
 
+void test_nghttp2_session_recv_altsvc(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_buf buf;
+  nghttp2_frame_hd hd;
+  nghttp2_mem *mem;
+  ssize_t rv;
+  nghttp2_option *option;
+  static const uint8_t origin[] = "nghttp2.org";
+  static const uint8_t field_value[] = "h2=\":443\"";
+
+  mem = nghttp2_mem_default();
+
+  nghttp2_buf_init2(&buf, NGHTTP2_FRAME_HDLEN + NGHTTP2_MAX_FRAME_SIZE_MIN,
+                    mem);
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option, NGHTTP2_ALTSVC);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 + sizeof(field_value) - 1,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ALTSVC == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_FLAG_NONE == ud.recv_frame_hd.flags);
+  CU_ASSERT(0 == ud.recv_frame_hd.stream_id);
+
+  nghttp2_session_del(session);
+
+  /* size of origin is larger than frame length */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 - 1, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1 - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* send large frame (16KiB) */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, NGHTTP2_MAX_FRAME_SIZE_MIN, NGHTTP2_ALTSVC,
+                        NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  memset(buf.last, 0, nghttp2_buf_avail(&buf));
+  buf.last += nghttp2_buf_avail(&buf);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+  CU_ASSERT(NGHTTP2_ALTSVC == ud.recv_frame_hd.type);
+  CU_ASSERT(NGHTTP2_MAX_FRAME_SIZE_MIN == ud.recv_frame_hd.length);
+
+  nghttp2_session_del(session);
+
+  /* received by server */
+  nghttp2_buf_reset(&buf);
+
+  nghttp2_session_server_new2(&session, &callbacks, &ud, option);
+
+  nghttp2_frame_hd_init(&hd, 2 + sizeof(origin) - 1 + sizeof(field_value) - 1,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, 0);
+  nghttp2_frame_pack_frame_hd(buf.last, &hd);
+  buf.last += NGHTTP2_FRAME_HDLEN;
+  nghttp2_put_uint16be(buf.last, sizeof(origin) - 1);
+  buf.last += 2;
+  buf.last = nghttp2_cpymem(buf.last, origin, sizeof(origin) - 1);
+  buf.last = nghttp2_cpymem(buf.last, field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_mem_recv(session, buf.pos, nghttp2_buf_len(&buf));
+
+  CU_ASSERT((ssize_t)nghttp2_buf_len(&buf) == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  nghttp2_buf_free(&buf, mem);
+  nghttp2_option_del(option);
+}
+
 void test_nghttp2_session_continue(void) {
   nghttp2_session *session;
   nghttp2_session_callbacks callbacks;
@@ -3364,6 +3482,113 @@ void test_nghttp2_session_on_data_received_fail_fast(void) {
   nghttp2_session_del(session);
 }
 
+void test_nghttp2_session_on_altsvc_received(void) {
+  nghttp2_session *session;
+  nghttp2_session_callbacks callbacks;
+  my_user_data ud;
+  nghttp2_frame frame;
+  nghttp2_mem *mem;
+  nghttp2_option *option;
+  uint8_t origin[] = "nghttp2.org";
+  uint8_t field_value[] = "h2=\":443\"";
+  int rv;
+
+  mem = nghttp2_mem_default();
+
+  memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
+  callbacks.on_frame_recv_callback = on_frame_recv_callback;
+
+  nghttp2_option_new(&option);
+  nghttp2_option_set_builtin_recv_extension_type(option, NGHTTP2_ALTSVC);
+
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  /* We just pass the strings without making a copy.  This is OK,
+     since we never call nghttp2_frame_altsvc_free(). */
+  nghttp2_frame_altsvc_init(&frame.ext, 0, origin, sizeof(origin) - 1,
+                            field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving empty origin with stream ID == 0 */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  nghttp2_frame_altsvc_init(&frame.ext, 0, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving non-empty origin with stream ID != 0 */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, sizeof(origin) - 1,
+                            field_value, sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Receiving empty origin with stream ID != 0; this is OK */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  open_sent_stream(session, 1);
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(1 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  /* Stream does not exist; ALTSVC will be ignored. */
+  nghttp2_session_client_new2(&session, &callbacks, &ud, option);
+
+  frame.ext.payload = &session->iframe.ext_frame_payload;
+
+  nghttp2_frame_altsvc_init(&frame.ext, 1, origin, 0, field_value,
+                            sizeof(field_value) - 1);
+
+  ud.frame_recv_cb_called = 0;
+  rv = nghttp2_session_on_altsvc_received(session, &frame);
+
+  CU_ASSERT(0 == rv);
+  CU_ASSERT(0 == ud.frame_recv_cb_called);
+
+  nghttp2_session_del(session);
+
+  nghttp2_option_del(option);
+}
+
 void test_nghttp2_session_send_headers_start_stream(void) {
   nghttp2_session *session;
   nghttp2_session_callbacks callbacks;

tests/nghttp2_session_test.h

@@ -45,6 +45,7 @@ void test_nghttp2_session_recv_unexpected_continuation(void);
 void test_nghttp2_session_recv_settings_header_table_size(void);
 void test_nghttp2_session_recv_too_large_frame_length(void);
 void test_nghttp2_session_recv_extension(void);
+void test_nghttp2_session_recv_altsvc(void);
 void test_nghttp2_session_continue(void);
 void test_nghttp2_session_add_frame(void);
 void test_nghttp2_session_on_request_headers_received(void);
@@ -60,6 +61,7 @@ void test_nghttp2_session_on_goaway_received(void);
 void test_nghttp2_session_on_window_update_received(void);
 void test_nghttp2_session_on_data_received(void);
 void test_nghttp2_session_on_data_received_fail_fast(void);
+void test_nghttp2_session_on_altsvc_received(void);
 void test_nghttp2_session_send_headers_start_stream(void);
 void test_nghttp2_session_send_headers_reply(void);
 void test_nghttp2_session_send_headers_frame_size_error(void);