Define routed stream relay requests and generation-scoped replies

src/stream/stream.c

@@ -879,6 +879,12 @@ void stream_optimizers_tick(struct UTUN_INSTANCE *inst, uint64_t now_ms) {
     }
 }
 
+/* Routed READY будит selector, не создавая пользовательского события или второго экземпляра. */
+void stream_relay_ready(struct UTUN_INSTANCE *inst, const struct stream_descriptor *key, uint64_t peer) {
+    struct stream_session *s = inst && inst->stream ? session_find(inst->stream, key->group_id, key->source_node_id) : NULL;
+    if (s && s->descriptor.source_epoch == key->source_epoch && s->optimizer) stream_optimizer_refresh(s->optimizer, peer);
+}
+
 /* Выборка идёт из live BGP-путей группы, не из nodes.online или глобальных соединений. */
 int stream_get_candidates(const struct STREAM_HANDLE *h, struct stream_candidate **out, size_t *count) {
     if (!out || *out || !count || !stream_handle_active(h)) {

src/stream/stream_optimizer.h

@@ -18,5 +18,7 @@ void stream_optimizer_destroy(struct stream_optimizer *optimizer);
 void stream_optimizer_tick(struct stream_optimizer *optimizer, struct STREAM_HANDLE *subscription, uint64_t now_ms);
 int stream_optimizer_configure(struct stream_optimizer *optimizer, const struct stream_selection_settings *settings);
 void stream_optimizer_info(struct stream_optimizer *optimizer, struct stream_selection_info *info);
+/* Подтверждённая помощь немедленно обновляет кандидатов и снимает старый backoff конкретного пира. */
+void stream_optimizer_refresh(struct stream_optimizer *optimizer, uint64_t peer);
 
 #endif

src/stream/stream_priv.h

@@ -31,6 +31,7 @@ int stream_relay_open(struct UTUN_INSTANCE *inst, const struct stream_descriptor
 int stream_relay_confirmed(struct UTUN_INSTANCE *inst, const struct stream_descriptor *key, uint64_t peer);
 /* Вызывается selector один раз на экземпляр; relay-only экземпляры новых запросов помощи не создают. */
 void stream_relay_demand(struct UTUN_INSTANCE *inst, const struct stream_descriptor *key, int needed, uint64_t now_ms);
+void stream_relay_ready(struct UTUN_INSTANCE *inst, const struct stream_descriptor *key, uint64_t peer);
 
 int stream_ingest_block(struct UTUN_INSTANCE *inst, const uint8_t *wire, size_t length);
 

src/stream/stream_wire.c

@@ -7,7 +7,7 @@
 /* Заголовок одинаков у raw и router payload; cmd raw сохраняется внутри routed-кодограммы. */
 int stream_wire_parse(const uint8_t *wire, size_t length, struct stream_message *m) {
     if (!wire || !m || length < STREAM_WIRE_HEADER || wire[0] != ETCP_ID_STREAM || wire[1] != STREAM_WIRE_VERSION
-        || wire[2] < STREAM_CMD_INFO_REQ || wire[2] > STREAM_CMD_OVERLOAD_SELECT) {
+        || wire[2] < STREAM_CMD_INFO_REQ || wire[2] > STREAM_CMD_RELAY_CANCEL) {
         DEBUG_WARN(DEBUG_CATEGORY_STREAM, "stream wire header invalid bytes=%zu", length); return STREAM_ERR_FORMAT;
     }
     struct stream_message result = {.command = wire[2], .subblock = wire[3], .payload = wire + STREAM_WIRE_HEADER,

src/stream/stream_wire.h

@@ -10,7 +10,7 @@
 extern "C" {
 #endif
 
-#define STREAM_WIRE_VERSION 3
+#define STREAM_WIRE_VERSION 4
 #define STREAM_WIRE_HEADER 52
 #define STREAM_PATH_MAX 32
 #define STREAM_END_SIZE 106
@@ -25,8 +25,12 @@ extern "C" {
 enum stream_command {
     STREAM_CMD_INFO_REQ = 1, STREAM_CMD_INFO_RESP, STREAM_CMD_SUBSCRIBE, STREAM_CMD_ACCEPT,
     STREAM_CMD_REJECT, STREAM_CMD_RENEW, STREAM_CMD_UNSUBSCRIBE, STREAM_CMD_CLOSED,
-    STREAM_CMD_DATA, STREAM_CMD_GAP, STREAM_CMD_END, STREAM_CMD_REVERSE_REQ, STREAM_CMD_OVERLOAD, STREAM_CMD_OVERLOAD_SELECT
+    STREAM_CMD_DATA, STREAM_CMD_GAP, STREAM_CMD_END, STREAM_CMD_REVERSE_REQ, STREAM_CMD_OVERLOAD, STREAM_CMD_OVERLOAD_SELECT,
+    STREAM_CMD_RELAY_REQUEST, STREAM_CMD_RELAY_STATUS, STREAM_CMD_RELAY_CANCEL
 };
+/* Routed помощь: handle — nonce запроса; эпохи запроса/сервиса независимы от raw ETCP-сессии. */
+enum stream_relay_status { STREAM_RELAY_STARTING = 1, STREAM_RELAY_READY, STREAM_RELAY_BOUND,
+                           STREAM_RELAY_REJECTED, STREAM_RELAY_ENDED, STREAM_RELAY_CANCELLED };
 enum stream_reject {
     STREAM_REASON_STOPPED = 1, STREAM_REASON_POSITION, STREAM_REASON_EXPIRED, STREAM_REASON_STALE,
     STREAM_REASON_CONFLICT, STREAM_REASON_LIMIT, STREAM_REASON_LOOP, STREAM_REASON_TRANSPORT,