fix: getInviteAddresses — use active direct-IP connections instead of DB peer list

Priority: iterate instance->connections for links with NAT_TYPE_DIRECT
(connected and reachable). Fallback: own socket addresses.
Removed broken getOnlinePeerAddresses() which returned other nodes' addresses.

tools/chatgui/transport/utun_node.cpp

@@ -103,12 +103,38 @@ QString UtunNode::pubKeyHex() const {
 }
 
 QList<NodeAddr> UtunNode::getInviteAddresses(DbManager* db) {
+    (void)db;
     QList<NodeAddr> addrs;
 
-    if (db && db->isOpen()) {
-        QList<NodeAddr> peerAddrs = db->getOnlinePeerAddresses(db->myNodeId());
-        for (int i = 0; i < peerAddrs.size() && i < 2; i++)
-            addrs.append(peerAddrs[i]);
+    if (m_instance) {
+        struct ll_entry* entry = m_instance->connections->head;
+        while (entry) {
+            struct conn_queue_entry* ce = (struct conn_queue_entry*)entry->data;
+            struct ETCP_CONN* conn = ce->conn;
+            if (conn && conn->initialized && conn->links_up > 0) {
+                struct ETCP_LINK* link = conn->links;
+                while (link) {
+                    if (link->link_state == 3 && link->nat_type == NAT_TYPE_DIRECT) {
+                        NodeAddr a;
+                        struct sockaddr_storage* sa = &link->remote_addr;
+                        if (sa->ss_family == AF_INET) {
+                            struct sockaddr_in* sin = (struct sockaddr_in*)sa;
+                            a.family = 4;
+                            a.address = QByteArray((const char*)&sin->sin_addr, 4);
+                            a.port = ntohs(sin->sin_port);
+                        } else {
+                            struct sockaddr_in6* sin6 = (struct sockaddr_in6*)sa;
+                            a.family = 6;
+                            a.address = QByteArray((const char*)&sin6->sin6_addr, 16);
+                            a.port = ntohs(sin6->sin6_port);
+                        }
+                        addrs.append(a);
+                    }
+                    link = link->next;
+                }
+            }
+            entry = entry->next;
+        }
     }
 
     if (addrs.isEmpty() && m_instance) {