etcp_router: round-robin send + контроль заполненности send_q через waiter на send_input_q

tests/test_etcp_router_unit.c

@@ -573,12 +573,12 @@ static int test_send_q(void) {
     int ret = etcp_router_conn_send(c, data, sizeof(data));
     if (ret != 0) FAIL("conn_send should return 0 (queued in send_q)");
     if (c->send_blocked == 0) FAIL("send_blocked not set");
-    if (c->send_resume_timer == NULL) FAIL("send_resume_timer not set");
+    if (c->watchdog_timer == NULL) FAIL("watchdog_timer not set");
     if (queue_entry_count(c->send_q) != 1) FAIL("send_q count != 1");
     if (c->tx_seq != ROUTER_MAX_INFLIGHT) FAIL("tx_seq advanced while queued");
 
     // Cancel timers manually
-    if (c->send_resume_timer) { uasync_cancel_timeout(ua, c->send_resume_timer); c->send_resume_timer = NULL; }
+    if (c->watchdog_timer) { uasync_cancel_timeout(ua, c->watchdog_timer); c->watchdog_timer = NULL; }
 
     etcp_router_conn_close(c);
     TEARDOWN();
@@ -633,7 +633,7 @@ static int test_timestamp(void) {
 }
 
 static int test_conn_send_no_bgp(void) {
-    TEST("conn_send — no BGP returns error");
+    TEST("conn_send — no BGP buffers with no_route (lossless)");
     struct UASYNC* ua; struct UTUN_INSTANCE inst; etcp_recv_fn recv_cb;
     SETUP();
     struct ETCP_ROUTER_CONN* c = etcp_router_conn_get(&inst, TOPO_GROUP_UTUN, TEST_REMOTE_NODE, TEST_SVC_ID);
@@ -641,7 +641,9 @@ static int test_conn_send_no_bgp(void) {
 
     uint8_t data[4] = { 1, 2, 3, 4 };
     int ret = etcp_router_conn_send(c, data, sizeof(data));
-    if (ret == 0) FAIL("conn_send should fail without BGP");
+    if (ret != 0) FAIL("conn_send should buffer (return 0) without BGP");
+    if (c->no_route == 0) FAIL("no_route not set");
+    if (queue_entry_count(c->send_q) != 1) FAIL("send_q count != 1");
 
     etcp_router_conn_close(c);
     TEARDOWN();