fix reconnect

src/etcp_connections.c

@@ -34,12 +34,12 @@ static void keepalive_timer_cb(void* arg);
 
 static void etcp_link_send_init(struct ETCP_LINK* link, uint8_t reset) {
     DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
-    DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "etcp_link_send_init link=%p, is_server=%d, reset=%d", link, link ? link->is_server : -1, reset);
+    DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "link=%p, is_server=%d, reset=%d", link, link ? link->is_server : -1, reset);
     if (!link || !link->etcp || !link->etcp->instance) return;
 
     struct ETCP_DGRAM* dgram = u_malloc(sizeof(struct ETCP_DGRAM) + 100);
     if (!dgram) {
-        DEBUG_ERROR(DEBUG_CATEGORY_CONNECTION, "etcp_link_send_init: malloc failed");
+        DEBUG_ERROR(DEBUG_CATEGORY_CONNECTION, "malloc failed");
         return;
     }
 
@@ -96,29 +96,55 @@ static void etcp_link_send_init(struct ETCP_LINK* link, uint8_t reset) {
     u_free(dgram);
 
     link->init_retry_count++;
-
-    if (!link->init_timer && link->is_server == 0) {
-        link->init_timeout = INIT_TIMEOUT_INITIAL;
-        link->init_timer = uasync_set_timeout(link->etcp->instance->ua, link->init_timeout, link, etcp_link_init_timer_cbk);
-    } else if (link->init_timer) {
-        if ((link->init_retry_count % 10) == 0 && link->init_timeout < INIT_TIMEOUT_MAX) {
-            link->init_timeout *= 2;
-            if (link->init_timeout > INIT_TIMEOUT_MAX) link->init_timeout = INIT_TIMEOUT_MAX;
-        }
-        uasync_cancel_timeout(link->etcp->instance->ua, link->init_timer);
-        link->init_timer = uasync_set_timeout(link->etcp->instance->ua, link->init_timeout, link, etcp_link_init_timer_cbk);
-    }
 }
 
 static void etcp_link_init_timer_cbk(void* arg) {
     DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
     struct ETCP_LINK* link = (struct ETCP_LINK*)arg;
-    if (!link || link->initialized || link->is_server != 0) return;
+    if (!link) return;
 
-    link->init_timer = NULL;
-    etcp_link_send_init(link,1);
+    if ((link->init_retry_count % 10) == 0 && link->init_timeout < INIT_TIMEOUT_MAX) {
+        link->init_timeout += link->init_timeout/4 +1;
+        if (link->init_timeout > INIT_TIMEOUT_MAX) link->init_timeout = INIT_TIMEOUT_MAX;
+    }
+    link->init_timer = uasync_set_timeout(link->etcp->instance->ua, link->init_timeout, link, etcp_link_init_timer_cbk);
+
+    if (link->link_state == 1) etcp_link_send_init(link,1);// init (with etcp reset)
+    else etcp_link_send_init(link,0);// no etcp reset (reinit)
+}
+
+void etcp_link_restart_init_timer(struct ETCP_LINK* link) {
+    DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
+    if (link->init_timer) uasync_cancel_timeout(link->etcp->instance->ua, link->init_timer);
+    link->init_timeout = INIT_TIMEOUT_INITIAL;
+    link->init_timer = uasync_set_timeout(link->etcp->instance->ua, link->init_timeout, link, etcp_link_init_timer_cbk);
 }
 
+void etcp_link_enter_init(struct ETCP_LINK* link) {// 
+    DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
+    if (!link) return;
+    link->link_state = 1; // handshake
+    if (link->is_server != 0) return;
+    etcp_link_send_init(link,1);// init with reset
+    etcp_link_restart_init_timer(link);
+}
+
+void etcp_link_enter_reinit(struct ETCP_LINK* link) {
+    DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
+    if (!link) return;
+    link->link_state = 2; // reconnect
+    if (link->is_server != 0) return;
+    etcp_link_send_init(link,0);// init without reset
+
+    if (link->keepalive_timer) {// keepalive заменяяется reinit запросами
+        uasync_cancel_timeout(link->etcp->instance->ua, link->keepalive_timer);
+        link->keepalive_timer = NULL;
+    }
+
+    etcp_link_restart_init_timer(link);
+}
+
+
 // Send empty keepalive packet (only timestamp, no sections)
 static void etcp_link_send_keepalive(struct ETCP_LINK* link) {
     DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
@@ -159,22 +185,6 @@ static int etcp_all_links_down(struct ETCP_CONN* etcp) {
     return 1;  // All links are down
 }
 
-// Start link recovery process - send CHANNEL_INIT (0x04) on all links
-static void etcp_start_link_recovery(struct ETCP_LINK* link) {
-    if (!link) return;
-
-    DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "[%s] Starting link recovery - all links are down", link->etcp->log_name ? link->etcp->log_name : "????→????");
-
-    struct ETCP_CONN* etcp = link->etcp;
-    if (link->is_server == 0) {  // Only client links
-        // Send CHANNEL_INIT (0x04) without reset
-        etcp_link_send_init(link, 0);
-        DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "[%s] Sent CHANNEL_INIT on link %p for recovery",
-                   etcp->log_name, link);
-    }
-    link = link->next;
-}
-
 // Cancel init_timer for all links of an ETCP_CONN
 static void etcp_cancel_all_init_timers(struct ETCP_CONN* etcp) {
     if (!etcp) return;
@@ -195,16 +205,17 @@ static void etcp_cancel_all_init_timers(struct ETCP_CONN* etcp) {
 static void keepalive_timer_cb(void* arg) {
     DEBUG_TRACE(DEBUG_CATEGORY_CONNECTION, "");
     struct ETCP_LINK* link = (struct ETCP_LINK*)arg;
-    if (!link || !link->etcp || !link->etcp->instance) return;
+    if (!link || !link->etcp || !link->etcp->instance) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CONNECTION, "KEEPALIVE NULL !!!!!!!!");
+        return;
+        }
 
     link->keepalive_timer = NULL;
 
     // Check if all links are down and start recovery if needed (client only)
     if (link->is_server == 0 && etcp_all_links_down(link->etcp)) {
         DEBUG_WARN(DEBUG_CATEGORY_CONNECTION, "[%s] All links are down, starting recovery", link->etcp->log_name);
-        etcp_start_link_recovery(link);
-        if (link->recovery_interval==0) link->recovery_interval=link->keepalive_interval*10;
-        link->keepalive_timer = uasync_set_timeout(link->etcp->instance->ua, link->recovery_interval, link, keepalive_timer_cb);
+        etcp_link_enter_reinit(link);// keepalive timr после reinit не нужен
         return;
     }
 
@@ -238,14 +249,7 @@ static void keepalive_timer_cb(void* arg) {
     }
 
     // Send keepalive only if no packets were sent since last tick
-    if (!link->pkt_sent_since_keepalive) {
-        etcp_link_send_keepalive(link);
-    } else {
-//        DEBUG_DEBUG(DEBUG_CATEGORY_CONNECTION, "[%s] Keepalive skipped - packet sent since last tick", link->etcp->log_name);
-        link->recovery_interval=0;
-    }
-
-    // Reset flag for next interval
+    if (!link->pkt_sent_since_keepalive) etcp_link_send_keepalive(link);
     link->pkt_sent_since_keepalive = 0;
 
 restart_timer:
@@ -598,7 +602,7 @@ struct ETCP_LINK* etcp_link_new(struct ETCP_CONN* etcp, struct ETCP_SOCKET* conn
 
     if (is_server == 0) {
         DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "etcp_link_new: client link, calling etcp_link_send_init");
-        etcp_link_send_init(link,1);
+        etcp_link_enter_init(link);
     }
     
     return link;
@@ -1078,10 +1082,23 @@ process_decrypted:
         link->etcp->peer_node_id = server_node_id; // If not set
         etcp_update_log_name(link->etcp);  // Update log_name with peer_node_id
 
+        // Cancel init timer if exists
+        if (link->init_timer) {
+            uasync_cancel_timeout(link->etcp->instance->ua, link->init_timer);
+            link->init_timer = NULL;
+        }
+
+        if (link->keepalive_timer) {
+            uasync_cancel_timeout(link->etcp->instance->ua, link->keepalive_timer);
+            link->keepalive_timer = NULL;
+        }
+
         // Mark link as initialized
 //        DEBUG_DEBUG(DEBUG_CATEGORY_CONNECTION, "Setting link->initialized=1, link=%p, is_server=%d", link, link->is_server);
         link->initialized = 1;// получен init response (client)
 //        link->link_status = 1;  // Link is up after successful initialization
+        link->link_state = 3; // connected
+
         if (link->etcp->initialized == 0) {
           etcp_conn_ready(link->etcp);
           }
@@ -1092,24 +1109,16 @@ process_decrypted:
 
         // Start keepalive timer
         etcp_link_send_keepalive(link);
-        if (!link->keepalive_timer && link->keepalive_interval > 0) {
-            DEBUG_DEBUG(DEBUG_CATEGORY_CONNECTION, "[%s] Keepalive timer started on link %p (interval=%d ms)",
-                        link->etcp->log_name, link, link->keepalive_interval);
-            link->keepalive_timer = uasync_set_timeout(link->etcp->instance->ua,
-                                                        link->keepalive_interval * 10,
-                                                        link, keepalive_timer_cb);
+
+        if (link->keepalive_interval > 0) {
+            DEBUG_DEBUG(DEBUG_CATEGORY_CONNECTION, "[%s] Keepalive timer started on link %p (interval=%d ms)", link->etcp->log_name, link, link->keepalive_interval);
+            link->keepalive_timer = uasync_set_timeout(link->etcp->instance->ua, link->keepalive_interval * 10, link, keepalive_timer_cb);
         }
 
         loadbalancer_link_ready(link);
         
         DEBUG_INFO(DEBUG_CATEGORY_CONNECTION, "etcp client: Link initialized successfully! Server node_id=%016llx, mtu=%d, local_link_id=%d, remote_link_id=%d", (unsigned long long)server_node_id, link->mtu, link->local_link_id, link->remote_link_id);
         
-        // Cancel init timer if exists
-        if (link->init_timer) {
-            uasync_cancel_timeout(link->etcp->instance->ua, link->init_timer);
-            link->init_timer = NULL;
-        }
-        
         memory_pool_free(e_sock->instance->pkt_pool, pkt);
         return;  // INIT_RESPONSE is handled, no further processing needed
     }

src/etcp_connections.h

@@ -72,6 +72,7 @@ struct ETCP_LINK {
     uint8_t recv_keepalive;         // 1 - up, 0 - down (принимаются ли пакеты)
     uint8_t remote_keepalive;       // 1 - up, 0 - down (удаленная сторона сообщает - принимаются ли у нее пакеты)
     uint8_t link_status;            // 1 - up, 0 - down (итоговый статус - если есть проблемы на любой стороне - линк down)
+    uint8_t link_state;             // 0 - just init, 1 - handshake, 2 - try reconnect, 3 - connected
     
     // Состояние установки соединения (только для клиентов)
     void* init_timer;               // Таймер для повторов INIT (NULL=не подключается)

src/etcp_send_test.txt

@@ -5,4 +5,28 @@
 2. вписываешь в link_ready_for_send_fn свою функцию
 3. в тесте открываешь ответный сокет
 4. добавляешь линк к etcp
-5. 
+5. 
+
+
+
+
+link initialization:
+
+client:
+
+1. init timer:
+  - шлём init with reset
+
+Получили response:
+  - отменяем init, переходим в обычный режим + keepalive
+
+link не отвечает:
+  - шлём init without reset
+
+server:
+  - просто ждёт init request.
+    как получил init, делает линк инициализированным.
+
+общая логика keepalive (client+server):
+    далее на init линках шлём keepalive со статусом remote keepalive.
+    если remote keepalive =0 - значит на другой стороне всё плохо и не шлём данные (только keepalive)

src/utun.c

@@ -385,6 +385,7 @@ int main(int argc, char *argv[]) {
     }
 
     DEBUG_INFO(DEBUG_CATEGORY_MEMORY, "Run mainloop");
+    DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "Run mainloop");
 
     while (instance && instance->running) {
         uasync_poll(ua, 100);

src/utun_instance.c

@@ -400,6 +400,7 @@ int utun_instance_init(struct UTUN_INSTANCE *instance) {
     // Start the main loop
     instance->running = 1;
     
+    DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "Connections initialized successfully");
     return 0;
 }