diff --git a/src/call/call_audio.c b/src/call/call_audio.c
index b5ae771c..64a26b47 100644
--- a/src/call/call_audio.c
+++ b/src/call/call_audio.c
@@ -37,10 +37,6 @@ static opus_codec_decoder_t*   g_decoder = NULL;
 static struct vj*              g_vj = NULL;
 static struct call_tones*      g_tones = NULL;
 
-/* диагностика ставок (DEBUG_CATEGORY_DEBUG): под g_mtx */
-static uint32_t g_tx_feed = 0, g_tx_encode_fail = 0, g_rx_push = 0, g_rx_pull = 0;
-static uint64_t g_rate_last_tb = 0;
-
 static const struct call_audio_ops g_ops = {
     .on_media  = call_audio_on_media,
     .get_stats = call_audio_get_stats,
@@ -78,7 +74,6 @@ void call_audio_on_media(struct UTUN_INSTANCE* inst, uint64_t call_id,
     if (g_active && call_id == g_call_id && g_vj && opus && len > 0) {
         vj_push(g_vj, opus, len);
         g_last_media_tb = get_time_tb();
-        g_rx_push++;
     }
     pthread_mutex_unlock(&g_mtx);
 }
@@ -204,20 +199,6 @@ void call_audio_stop(void) {
 
 /* ── аудио-поток: TX / RX ── */
 
-/* Раз в ~1с логируем ставки TX/RX — диагностика «звонок не проходит» (DEBUG_CATEGORY_DEBUG).
- * Вызывается из аудио-потока (pull_pcm); счётчики под g_mtx. */
-static void call_audio_rate_tick(uint64_t now_tb) {
-    uint32_t feed = 0, encfail = 0, push = 0, pull = 0, resync = 0;
-    pthread_mutex_lock(&g_mtx);
-    feed = g_tx_feed; encfail = g_tx_encode_fail; push = g_rx_push; pull = g_rx_pull;
-    g_tx_feed = g_tx_encode_fail = g_rx_push = g_rx_pull = 0;
-    if (g_vj) resync = vj_resyncs(g_vj);
-    g_rate_last_tb = now_tb;
-    pthread_mutex_unlock(&g_mtx);
-    DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "%s: rates feed=%u/s encfail=%u push=%u/s pull=%u/s resync=%u",
-                CALL_AUDIO_ID, feed, encfail, push, pull, resync);
-}
-
 int call_audio_feed_pcm(uint64_t call_id, const int16_t* pcm, int count) {
     if (!pcm || count != CALL_AUDIO_FRAME_SAMPLES) return -1;
 
@@ -232,8 +213,6 @@ int call_audio_feed_pcm(uint64_t call_id, const int16_t* pcm, int count) {
         return -1;
     }
     len = opus_codec_encode(g_encoder, pcm, count, opus, (int)sizeof(opus));
-    g_tx_feed++;
-    if (len <= 0) g_tx_encode_fail++;
     ua = g_inst ? g_inst->ua : NULL;
     inst = g_inst;
     pthread_mutex_unlock(&g_mtx);
@@ -269,19 +248,11 @@ int call_audio_pull_pcm(uint64_t call_id, int16_t* out, int max_samples) {
         j = g_vj;
         tones = g_tones;
         last_media = g_last_media_tb;
-        g_rx_pull++;
     }
     pthread_mutex_unlock(&g_mtx);
 
     if (!active || !j || !tones) return 0;
 
-    /* диагностика ставок: раз в ~1с (аудио-поток) */
-    {
-        uint64_t now_tb = get_time_tb();
-        if (g_rate_last_tb == 0) g_rate_last_tb = now_tb;
-        else if (now_tb - g_rate_last_tb >= 10000) call_audio_rate_tick(now_tb);
-    }
-
     /* завершение: доигрываем тон (450мс), затем тишина. Тон стартует лениво
      * здесь (аудио-поток) — begin_end лишь выставляет флаг, чтобы не гонять
      * генератор тонов с GUI-потоком. */
diff --git a/src/transport_layer/etcp_connections.c b/src/transport_layer/etcp_connections.c
index 5c8ae58d..1dde2085 100644
--- a/src/transport_layer/etcp_connections.c
+++ b/src/transport_layer/etcp_connections.c
@@ -28,6 +28,9 @@
 #include "../lib/debug_config.h"
 #include "etcp_loadbalancer.h"
 #include "etcp_keepalive.h"
+#ifdef UTUN_HAVE_STANDBY
+#include "standby.h"
+#endif
 #include <stdlib.h>
 #include <time.h>
 #include "../lib/mem.h"
@@ -2107,6 +2110,9 @@ static void etcp_process_packet(struct ETCP_SOCKET* e_sock, uint8_t* data,
                salt[0], salt[1], salt[2], salt[3], salt[4], salt[5], salt[6], salt[7],
                encrypted_pubkey[0], encrypted_pubkey[1], encrypted_pubkey[2], encrypted_pubkey[3]);
     if (sc_decrypt(&sc, data, recv_len - SC_PUBKEY_ENC_SIZE, (uint8_t*)&pkt->timestamp, &pkt_len)) {
+#ifdef UTUN_HAVE_STANDBY
+        { char who[64]; snprintf(who, sizeof(who), "addr=%s", sockaddr_storage_to_str(&addr).str); standby_log_rx("udp undecryptable", who); }
+#endif
         if (link) {
             DEBUG_ERROR(DEBUG_CATEGORY_CRYPTO,
                         "packet undecryptable (normal+init fail) from=%s — existing link log=%s state=%d sess=%d",
@@ -2140,6 +2146,9 @@ static void etcp_process_packet(struct ETCP_SOCKET* e_sock, uint8_t* data,
     uint8_t code = pkt->data[0];
     uint64_t peer_id = be64toh(*(uint64_t*)(pkt->data + 2));
     if (code == ETCP_PING) {
+#ifdef UTUN_HAVE_STANDBY
+        { char who[64]; snprintf(who, sizeof(who), "addr=%s", sockaddr_storage_to_str(&addr).str); standby_log_rx("udp ping", who); }
+#endif
         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "X25519 decrypted: PING from peer=0x%016llx src=%s",
                    (unsigned long long)peer_id, sockaddr_storage_to_str(&addr).str);
         int ret = handle_ping(e_sock, pkt, &addr, decrypted_pubkey, pkt_len);
@@ -2147,6 +2156,9 @@ static void etcp_process_packet(struct ETCP_SOCKET* e_sock, uint8_t* data,
         return;
     }
     if (code == ETCP_PONG) {
+#ifdef UTUN_HAVE_STANDBY
+        { char who[64]; snprintf(who, sizeof(who), "addr=%s", sockaddr_storage_to_str(&addr).str); standby_log_rx("udp pong", who); }
+#endif
         DEBUG_DEBUG(DEBUG_CATEGORY_ETCP, "X25519 decrypted: PONG from peer=0x%016llx src=%s",
                    (unsigned long long)peer_id, sockaddr_storage_to_str(&addr).str);
         int ret = handle_pong(e_sock, pkt, &addr, pkt_len);
@@ -2483,6 +2495,17 @@ int etcp_packet_decrypted(struct ETCP_SOCKET* e_sock, struct ETCP_DGRAM* pkt,
 
     uint8_t pkt_code = pkt->data[0];
 
+#ifdef UTUN_HAVE_STANDBY
+    {
+        char who[256];
+        snprintf(who, sizeof(who), "%s addr=%s", link->etcp->log_name,
+                 sockaddr_storage_to_str(&link->remote_addr).str);
+        int is_ka = (pkt_code == ETCP_KEEPALIVE || pkt_code == ETCP_KEEPALIVE_REQ || pkt_code == ETCP_KEEPALIVE_RESP);
+        standby_log_rx(is_ka ? (link->is_tcp ? "tcp keepalive" : "udp keepalive")
+                              : (link->is_tcp ? "tcp data" : "udp data"), who);
+    }
+#endif
+
     if (etcp_keepalive_on_recv(e_sock, pkt, link, pkt_len)) {
         return 0;
     }
diff --git a/src/transport_layer/etcp_keepalive.c b/src/transport_layer/etcp_keepalive.c
index 8b83b1ed..176503dc 100644
--- a/src/transport_layer/etcp_keepalive.c
+++ b/src/transport_layer/etcp_keepalive.c
@@ -176,13 +176,13 @@ static uint8_t mobile_desired_ka_mode(struct UTUN_INSTANCE* inst) {
     return (inst->client_activity == CLIENT_ACTIVITY_ACTIVE) ? KA_MODE_NORMAL : KA_MODE_STANDBY;
 }
 
-static void restart_keepalive_timer(struct ETCP_LINK* link) {
+static void restart_keepalive_timer_ms(struct ETCP_LINK* link, uint16_t ms) {
     if (!link || !link->etcp || !link->etcp->instance) return;
     if (link->keepalive_timer) {
         uasync_cancel_timeout(link->etcp->instance->ua, link->keepalive_timer);
         link->keepalive_timer = NULL;
     }
-    link->keepalive_timer = uasync_set_timeout(link->etcp->instance->ua, link->ka_period_ms * 10, link, keepalive_timer_cb, "link_keepalive");
+    link->keepalive_timer = uasync_set_timeout(link->etcp->instance->ua, (uint32_t)ms * 10, link, keepalive_timer_cb, "link_keepalive");
 }
 
 static void apply_link_ka_mode(struct ETCP_LINK* link, uint8_t mode) {
@@ -194,7 +194,7 @@ static void apply_link_ka_mode(struct ETCP_LINK* link, uint8_t mode) {
     DEBUG_INFO(DEBUG_CATEGORY_KEEPALIVE, "[%s] keepalive mode applied: mode=%s interval=%dms timeout=%dms pinned=%d",
                link->etcp->log_name, mode == KA_MODE_STANDBY ? "standby" : "normal",
                ms, link->keepalive_timeout, link->ka_pinned);
-    restart_keepalive_timer(link);
+    restart_keepalive_timer_ms(link, link->ka_period_ms);
 }
 
 static void etcp_keepalive_send_mode_pkt(struct ETCP_LINK* link, uint8_t code, uint8_t mode) {
@@ -263,6 +263,13 @@ int etcp_keepalive_on_recv(struct ETCP_SOCKET* e_sock, struct ETCP_DGRAM* pkt,
             link->keepalive_timeout = (uint32_t)peer_period * KA_TIMEOUT_MULT;
         }
         link->keepalive_recv_count++;
+        /* Сервер в standby синхронизируется с keepalive клиента: отвечает echo и
+         * пере-армит свой таймер на период+запас, чтобы собственная проба ушла
+         * только если клиент опаздывает. */
+        if (link->is_server && link->ka_pinned) {
+            etcp_link_send_keepalive(link);
+            restart_keepalive_timer_ms(link, (uint16_t)(link->ka_period_ms + KA_SYNC_MARGIN_MS));
+        }
         memory_pool_free(e_sock->instance->pkt_pool, pkt);
         return 1;
     }
diff --git a/src/transport_layer/etcp_keepalive.h b/src/transport_layer/etcp_keepalive.h
index 345be775..e1966eae 100644
--- a/src/transport_layer/etcp_keepalive.h
+++ b/src/transport_layer/etcp_keepalive.h
@@ -21,6 +21,10 @@ extern "C" {
 #define KA_MOBILE_ACTIVE_MS   3000
 #define KA_MOBILE_STANDBY_MS  30000
 
+/* Запас (мс) поверх периода keepalive: сервер в standby пере-армит свой таймер
+ * на период+запас после эхо-ответа, чтобы пробу успеть отправить при опоздании клиента. */
+#define KA_SYNC_MARGIN_MS     2000
+
 // --- перенесены из etcp_connections.c (имена сохранены) ---
 uint16_t negotiate_keepalive(uint8_t my_type, uint16_t my_ka,
                              uint8_t peer_type, uint16_t peer_ka);
diff --git a/src/transport_layer/reality_relay.c b/src/transport_layer/reality_relay.c
index eaa3644c..b80b6ff6 100644
--- a/src/transport_layer/reality_relay.c
+++ b/src/transport_layer/reality_relay.c
@@ -9,6 +9,9 @@
 #include "../lib/mem.h"
 #include "../lib/debug_config.h"
 #include "../lib/platform_compat.h"
+#ifdef UTUN_HAVE_STANDBY
+#include "standby.h"
+#endif
 #include "../lib/async_dns.h"
 #include <string.h>
 #include <stdlib.h>
@@ -132,6 +135,16 @@ static void relay_client_read_cb(socket_t sock, void *arg) {
         if (r->dest_read_eof) relay_free(r);
         return;
     }
+#ifdef UTUN_HAVE_STANDBY
+    {
+        struct sockaddr_storage sa; socklen_t slen = sizeof(sa);
+        char who[64];
+        if (getpeername(r->client_sock, (struct sockaddr*)&sa, &slen) == 0)
+            snprintf(who, sizeof(who), "addr=%s", sockaddr_storage_to_str(&sa).str);
+        else snprintf(who, sizeof(who), "?");
+        standby_log_rx("reality relay", who);
+    }
+#endif
     r->c2d = buf; r->c2d_len = (size_t)n; r->c2d_off = 0;
     uasync_set_socket_read(r->ua, r->client_sid, 0);   // backpressure
     relay_flush_c2d(r);
diff --git a/src/transport_layer/stcp.c b/src/transport_layer/stcp.c
index 9424f773..cf9b253f 100644
--- a/src/transport_layer/stcp.c
+++ b/src/transport_layer/stcp.c
@@ -4,6 +4,9 @@
 #include "../lib/mem.h"
 #include "../lib/debug_config.h"
 #include "../lib/platform_compat.h"
+#ifdef UTUN_HAVE_STANDBY
+#include "standby.h"
+#endif
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -25,6 +28,19 @@ void stcp_conn_set_on_close(struct stcp_conn *c, void (*cb)(struct stcp_conn *co
     c->close_arg = arg;
 }
 
+static struct sockaddr_storage g_peer_storage;
+static ip_str_t g_peer_ip;
+const char* stcp_conn_peer_str(struct stcp_conn *c) {
+    if (!c || c->sock == SOCKET_INVALID) return "?";
+    memset(&g_peer_storage, 0, sizeof(g_peer_storage));
+    socklen_t slen = sizeof(g_peer_storage);
+    if (getpeername(c->sock, (struct sockaddr*)&g_peer_storage, &slen) == 0) {
+        g_peer_ip = sockaddr_storage_to_str(&g_peer_storage);
+        return g_peer_ip.str;
+    }
+    return "?";
+}
+
 void stcp_conn_free(struct stcp_conn *c) {
     if (!c) return;
     stcp_server_remove_conn(c);
@@ -257,7 +273,12 @@ void stcp_recv_try(struct stcp_conn *c) {
 
         size_t data_len = (size_t)c->recv_msg_size;
         uint8_t *plain = c->recv_buf + 2;
-        if (stcp_check_crc(plain, data_len) != 0) { stcp_conn_do_close(c, 5); return; }
+        if (stcp_check_crc(plain, data_len) != 0) {
+#ifdef UTUN_HAVE_STANDBY
+            standby_log_rx("tcp undecryptable", stcp_conn_peer_str(c));
+#endif
+            stcp_conn_do_close(c, 5); return;
+        }
 
         if (c->recv_on_chunk) c->recv_on_chunk(c, plain, data_len);
         if (c->state == STCP_STATE_CLOSED || c->state == STCP_STATE_ERROR) return;
diff --git a/src/transport_layer/stcp.h b/src/transport_layer/stcp.h
index 8fc91b4e..5ec5d9bd 100644
--- a/src/transport_layer/stcp.h
+++ b/src/transport_layer/stcp.h
@@ -148,6 +148,8 @@ struct stcp_conn {
 };
 
 void stcp_conn_free(struct stcp_conn *c);
+/* Адрес пира соединения для логов (статический буфер). "?" если недоступен. */
+const char* stcp_conn_peer_str(struct stcp_conn *c);
 void stcp_conn_set_tx_queue(struct stcp_conn *c, struct ll_queue *q);
 void stcp_conn_set_rx_queue(struct stcp_conn *c, struct ll_queue *q);
 void stcp_conn_set_on_close(struct stcp_conn *c, void (*cb)(struct stcp_conn *conn, int err, void *arg), void *arg);
diff --git a/src/transport_layer/stcp_client.c b/src/transport_layer/stcp_client.c
index 18326a9b..bc2e9a59 100644
--- a/src/transport_layer/stcp_client.c
+++ b/src/transport_layer/stcp_client.c
@@ -10,6 +10,9 @@
 #include "../lib/mem.h"
 #include "../lib/debug_config.h"
 #include "../lib/platform_compat.h"
+#ifdef UTUN_HAVE_STANDBY
+#include "standby.h"
+#endif
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -107,7 +110,12 @@ static void client_hs_cb(struct stcp_conn *c, uint8_t *data, size_t len) {
     memcpy(enc_hs, data + SC_PUBKEY_ENC_SIZE, STCP_HS_ENC_SERVER);
     log_dump(DEBUG_LEVEL_DEBUG, DEBUG_CATEGORY_CRYPTO, "stcp_client enc_hs BEFORE xor", enc_hs, STCP_HS_ENC_SERVER);
     size_t hs_data_len;
-    if (stcp_frame_decrypt(enc_hs, STCP_HS_ENC_SERVER, &c->stream_recv, &hs_data_len)) { stcp_conn_do_close(c, 3); return; }
+    if (stcp_frame_decrypt(enc_hs, STCP_HS_ENC_SERVER, &c->stream_recv, &hs_data_len)) {
+#ifdef UTUN_HAVE_STANDBY
+        standby_log_rx("tcp undecryptable (hs)", stcp_conn_peer_str(c));
+#endif
+        stcp_conn_do_close(c, 3); return;
+    }
     log_dump(DEBUG_LEVEL_DEBUG, DEBUG_CATEGORY_CRYPTO, "stcp_client enc_hs AFTER xor", enc_hs, STCP_HS_ENC_SERVER);
     memcpy(c->peer_ed25519_pubkey, enc_hs, SC_PUBKEY_SIZE); c->peer_ed25519_set = 1;
     c->peer_got_initial_pkt = enc_hs[32];
diff --git a/src/transport_layer/stcp_server.c b/src/transport_layer/stcp_server.c
index 8fcd11c9..be62c90d 100644
--- a/src/transport_layer/stcp_server.c
+++ b/src/transport_layer/stcp_server.c
@@ -13,6 +13,9 @@
 #include "../utun_instance.h"
 #include "../ntp_time.h"
 #include "etcp.h"
+#ifdef UTUN_HAVE_STANDBY
+#include "standby.h"
+#endif
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -90,6 +93,9 @@ static void server_hs_phase1_cb(struct stcp_conn *c, uint8_t *data, size_t len)
     memcpy(enc_hs, data + SC_PUBKEY_ENC_SIZE, STCP_HS_ENC_CLIENT);
     size_t hs_data_len;
     if (stcp_frame_decrypt(enc_hs, STCP_HS_ENC_CLIENT, &c->stream_recv, &hs_data_len)) {
+#ifdef UTUN_HAVE_STANDBY
+        standby_log_rx("tcp undecryptable (hs)", stcp_conn_peer_str(c));
+#endif
         DEBUG_ERROR(DEBUG_CATEGORY_ETCP, "decrypt/CRC failed");
         stcp_conn_do_close(c, 2); return;
     }
@@ -160,6 +166,9 @@ static void server_hs_phase2_cb(struct stcp_conn *c, uint8_t *data, size_t len)
     int r = stcp_try_send(c, resp, total_resp);
     if (r < 0) { u_free(resp); stcp_conn_do_close(c, 3); return; }
     if (c->peer_flags & STCP_HANDSHAKE_FLAG_PING) {
+#ifdef UTUN_HAVE_STANDBY
+        standby_log_rx("tcp ping", stcp_conn_peer_str(c));
+#endif
         DEBUG_INFO(DEBUG_CATEGORY_ETCP, "stcp_server: ping answered, graceful close sock=%d", (int)c->sock);
         if (r == 0) { stcp_conn_do_close(c, 0); return; }
         c->close_after_send = 1;
@@ -216,12 +225,18 @@ static void reality_ch_hdr_cb(struct stcp_conn *c, uint8_t *data, size_t len) {
     (void)len;
     memcpy(c->reality_hdr, data, 5);
     if (data[0] != 0x16) {
+#ifdef UTUN_HAVE_STANDBY
+        standby_log_rx("reality undecryptable", stcp_conn_peer_str(c));
+#endif
         DEBUG_WARN(DEBUG_CATEGORY_REALITY, "stcp_server: first byte 0x%02x — not TLS, relay", data[0]);
         reality_server_start_relay(c, data, 5, c->recv_buf + 5, c->recv_buf_len - 5);
         return;
     }
     uint16_t rec_len = (uint16_t)((data[3] << 8) | data[4]);
     if (rec_len < 4 || rec_len > REALITY_MAX_CH_SIZE) {
+#ifdef UTUN_HAVE_STANDBY
+        standby_log_rx("reality undecryptable", stcp_conn_peer_str(c));
+#endif
         DEBUG_WARN(DEBUG_CATEGORY_REALITY, "stcp_server: bad TLS record len %u, relay", rec_len);
         reality_server_start_relay(c, data, 5, c->recv_buf + 5, c->recv_buf_len - 5);
         return;
@@ -249,6 +264,9 @@ static void reality_ch_body_cb(struct stcp_conn *c, uint8_t *data, size_t len) {
         return;
     }
     DEBUG_INFO(DEBUG_CATEGORY_REALITY, "stcp_server: reality auth failed rc=%d, relay", rc);
+#ifdef UTUN_HAVE_STANDBY
+    standby_log_rx("reality undecryptable (auth)", stcp_conn_peer_str(c));
+#endif
     reality_server_start_relay(c, full, 5 + len, c->recv_buf + len, c->recv_buf_len - len);
 }
 
diff --git a/tools/chatgui-android/libutun_lite/instance_lite.c b/tools/chatgui-android/libutun_lite/instance_lite.c
index e676e1d4..bf35920e 100644
--- a/tools/chatgui-android/libutun_lite/instance_lite.c
+++ b/tools/chatgui-android/libutun_lite/instance_lite.c
@@ -267,6 +267,7 @@ static void* instance_thread(void* arg) {
     struct utun_config* config = parse_config_from_buf(config_text, strlen(config_text), "android");
     u_free(config_text);
     if (!config) { IL_LOGE("parse_config_from_buf failed"); __atomic_store_n(&g_thread_running, 0, __ATOMIC_RELEASE); pthread_detach(pthread_self()); return NULL; }
+    config->global.client_type = CLIENT_TYPE_MOBILE;   /* Android — всегда мобильный узел (keepalive standby/normal) */
 
     install_crash_handlers();
 
@@ -378,6 +379,7 @@ static void* instance_thread(void* arg) {
         struct utun_config* config = parse_config_from_buf(cfg, strlen(cfg), "android");
         u_free(cfg);
         if (!config) { IL_LOGE("poll exit: parse_config failed"); break; }
+        config->global.client_type = CLIENT_TYPE_MOBILE;   /* Android — всегда мобильный узел */
 
         g_inst = utun_instance_create_from_config(g_ua, config);
         my_inst = g_inst;
diff --git a/tools/chatgui-android/libutun_lite/standby.c b/tools/chatgui-android/libutun_lite/standby.c
index b8fc7539..e066a19c 100644
--- a/tools/chatgui-android/libutun_lite/standby.c
+++ b/tools/chatgui-android/libutun_lite/standby.c
@@ -378,6 +378,15 @@ void standby_notify_network_activity(void) {
     standby_wake_all_waiters();
 }
 
+void standby_log_rx(const char* kind, const char* who) {
+    if (!g_enabled || g_phase != PHASE_SLEEP) return;
+    uint64_t slept = get_time_tb() - g_phase_start_tb;
+    DEBUG_INFO(DEBUG_CATEGORY_DEBUG,
+               "standby: rx in SLEEP: %s from %s, slept %d.%ds",
+               kind ? kind : "?", who ? who : "?",
+               (int)(slept / STANDBY_TB_PER_SEC), (int)((slept % STANDBY_TB_PER_SEC) / 1000));
+}
+
 void standby_set_intervals_ms(int active_ms, int sleep_ms, int min_sleep_ms) {
     if (active_ms <= 0 || sleep_ms <= 0) {
         g_override = 0;
diff --git a/tools/chatgui-android/libutun_lite/standby.h b/tools/chatgui-android/libutun_lite/standby.h
index 9d6f1c33..99084ef6 100644
--- a/tools/chatgui-android/libutun_lite/standby.h
+++ b/tools/chatgui-android/libutun_lite/standby.h
@@ -50,6 +50,10 @@ void  standby_wait_cancel(void* handle);
  * Вызывается на uasync-потоке. */
 void  standby_notify_network_activity(void);
 
+/* Диагностика: входящий пакет во время SLEEP-фазы (фазу НЕ меняет).
+ * kind — транспорт/тип пакета (строка), who — идентификатор отправителя. */
+void  standby_log_rx(const char* kind, const char* who);
+
 /* Переопределить интервалы (мс), минуя chat_setting. Для тестов.
  * active_ms/sleep_ms <= 0 → вернуться к chat_setting.
  * min_sleep_ms может быть 0 (реагировать на сетевую активность сразу). */