add etcp_router INFO logs for ICMP_PROXY reply path (send+deliver)

src/etcp_router.c

@@ -44,6 +44,9 @@ static void etcp_router_recv_cb(struct ETCP_CONN* conn, struct ll_entry* entry)
                     (unsigned long long)(*(uint64_t*)(entry->dgram + 10)));
         queue_entry_free(entry); queue_dgram_free(entry);
         inst->router_bindings.callbacks[svc_id](conn, svc_entry);
+        if (svc_id == ETCP_ID_ICMP_PROXY)
+            DEBUG_INFO(DEBUG_CATEGORY_ETCP, "etcp_router: ICMP_PROXY reply delivered to handler self=%016llx",
+                       (unsigned long long)inst->node_id);
     } else {
         struct ETCP_CONN* next = route_bgp_find_conn_for_node(inst->bgp, dst_node_id);
         if (!next) {
@@ -142,7 +145,11 @@ int etcp_route_send(struct UTUN_INSTANCE* inst, uint64_t dst_node_id, struct ll_
         queue_entry_free(new_entry); queue_dgram_free(new_entry);
         return -1;
     }
-    DEBUG_TRACE(DEBUG_CATEGORY_ETCP, "etcp_route_send: svc_id=%u → %016llx via %s len=%zu",
-                svc_id, (unsigned long long)dst_node_id, conn->log_name, total_len);
+    if (svc_id == ETCP_ID_ICMP_PROXY)
+        DEBUG_INFO(DEBUG_CATEGORY_ETCP, "etcp_router: ICMP_PROXY reply sent %zu bytes → %016llx via %s",
+                   total_len, (unsigned long long)dst_node_id, conn->log_name);
+    else
+        DEBUG_TRACE(DEBUG_CATEGORY_ETCP, "etcp_route_send: svc_id=%u → %016llx via %s len=%zu",
+                    svc_id, (unsigned long long)dst_node_id, conn->log_name, total_len);
     return etcp_send(conn, new_entry);
 }