fix TCP data stall: feed transport_to_uip on ETCP recv, tcp_poll interval 0→2 for close detection

src/tcp_proxy.c

@@ -172,6 +172,14 @@ static int tcp_proxy_handle_non_tcp(struct tcp_proxy* p, uint8_t* buf, size_t le
     return 0;
 }
 
+// ====================================================================
+// Queue callback: автоматически кормит данные из transport_to_uip в lwIP
+// ====================================================================
+static void transport_to_uip_cb(struct ll_queue* q, void* arg) {
+    proxy_feed_from_transport((struct proxy_conn*)arg);
+    queue_resume_callback(q);
+}
+
 // ====================================================================
 // Helper: feed data from transport_to_uip queue to lwIP TCP
 // ====================================================================
@@ -222,7 +230,7 @@ static err_t proxy_accept_cb(void *arg, struct tcp_pcb *newpcb, err_t err) {
     tcp_recv(newpcb, proxy_recv_cb);
     tcp_sent(newpcb, proxy_sent_cb);
     tcp_err(newpcb, proxy_err_cb);
-    tcp_poll(newpcb, proxy_poll_cb, 0);
+    tcp_poll(newpcb, proxy_poll_cb, 2);
     tcp_nagle_disable(newpcb);
 
     pc->uip_to_transport = queue_new(p->ua, 0, 0, 0, "uip_to_transport");
@@ -299,7 +307,6 @@ static void proxy_err_cb(void *arg, err_t err) {
 static err_t proxy_poll_cb(void *arg, struct tcp_pcb *pcb) {
     struct proxy_conn *pc = (struct proxy_conn *)arg;
     if (!pc) return LERR_OK;
-    proxy_feed_from_transport(pc);
     if (pc->closing_tun && pc->closing_rem && pc->pcb) {
         struct tcp_pcb *save = pc->pcb;
         tcp_arg(save, NULL); pc->pcb = NULL; tcp_close(save);
@@ -688,6 +695,7 @@ void tcp_proxy_etcp_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry) {
                 if (data_len > 0) {
                     struct ll_entry* e = entry_from_data(pc->proxy->entry_pool, entry->dgram + TCP_PROXY_HDR_SIZE, (uint16_t)data_len);
                     if (e) queue_data_put(pc->transport_to_uip, e);
+                    proxy_feed_from_transport(pc);
                 }
             }
         }