Keep BLE candidate monitoring separate from IP probes

src/routing_layer/conn_mgr_monitor.c

@@ -8,6 +8,7 @@
 #include "utun_instance.h"
 #include "etcp.h"
 #include "etcp_connections.h"
+#include "etcp_link_io.h"
 #include "etcp_router.h"
 #include "topo_node.h"
 #include "topo_group.h"
@@ -227,9 +228,29 @@ void cm_candidate_ping_timer_cb(void* arg) {
             struct TOPO_NODE* ni = topo_node_registry_find(mgr->instance->topo_groups, nq->node_id);
             /* пир в SLEEP-фазе — прямое соединение живо, пинг будит его: пропускаем */
             if (ni && !dc->peer_sleep_phase) {
+                /* BLE и другие пакетные драйверы живут через ETCP keepalive, без IP-проб.
+                 * При нескольких транспортах ищем живой IP-путь, не исключая пира из кандидатов. */
+                struct etcp_link_snapshot transport;
+                for (; link; link = link->next) {
+                    if (!link->initialized || !link->link_status || link->closing) continue;
+                    if (etcp_link_get_snapshot(link, &transport)) continue;
+                    if (!transport.has_ip) {
+                        DEBUG_DEBUG(DEBUG_CATEGORY_BGP,
+                            "candidate probe skipped: peer=%016llx link=%u transport=%s reason=non-IP; ETCP keepalive active",
+                            (unsigned long long)nid, link->local_link_id, transport.protocol);
+                        continue;
+                    }
+                    if (link->remote_addr.ss_family != AF_INET && link->remote_addr.ss_family != AF_INET6) {
+                        DEBUG_WARN(DEBUG_CATEGORY_BGP, "candidate probe invalid IP address: peer=%016llx link=%u transport=%s family=%d",
+                                   (unsigned long long)nid, link->local_link_id, transport.protocol, link->remote_addr.ss_family);
+                        continue;
+                    }
+                    break;
+                }
+                if (!link) continue;
                 DEBUG_TRACE(DEBUG_CATEGORY_BGP, "candidate probe: group=%016llx peer=%016llx link=%u transport=%s",
                             (unsigned long long)mgr->group->group_id, (unsigned long long)nid, link->local_link_id,
-                            link->is_tcp ? "TCP" : "UDP");
+                            transport.protocol);
                 if (link->is_tcp) {
                     struct stcp_client** slot = NULL;
                     for (uint8_t i = 0; i < CONN_MGR_MAX_CANDIDATES; i++)