Try ping contacts that send us storage server messages in the last 2 mins

js/modules/loki_p2p_api.js

@@ -56,7 +56,7 @@ class LokiP2pAPI extends EventEmitter {
       baseDetails.port !== port
     ) {
       // Had the contact marked as online and details we had were the same
-      // Do nothing
+      this.pingContact(pubKey);
       return;
     }
 
@@ -71,6 +71,14 @@ class LokiP2pAPI extends EventEmitter {
     return this.contactP2pDetails[pubKey] || null;
   }
 
+  isContactOnline(pubKey) {
+    const contactDetails = this.contactP2pDetails[pubKey];
+    if (!contactDetails || !contactDetails.isOnline) {
+      return false;
+    }
+    return contactDetails.isOnline;
+  }
+
   setContactOffline(pubKey) {
     this.emit('offline', pubKey);
     if (!this.contactP2pDetails[pubKey]) {
@@ -101,11 +109,8 @@ class LokiP2pAPI extends EventEmitter {
   }
 
   pingContact(pubKey) {
-    if (
-      !this.contactP2pDetails[pubKey] ||
-      this.contactP2pDetails[pubKey].isOnline
-    ) {
-      // Don't ping if we don't have their details or they are already online
+    if (!this.contactP2pDetails[pubKey]) {
+      // Don't ping if we don't have their details
       return;
     }
     this.emit('pingContact', pubKey);

libtextsecure/message_receiver.js

@@ -945,6 +945,16 @@ MessageReceiver.prototype.extend({
     return this.removeFromCache(envelope);
   },
   handleDataMessage(envelope, msg) {
+    if (envelope.isP2p) {
+      lokiP2pAPI.setContactOnline(envelope.source);
+    } else {
+      const timestamp = envelope.timestamp.toNumber();
+      const now = Date.now();
+      const ageInSeconds = (now - timestamp) / 1000;
+      if (ageInSeconds <= 120) {
+        lokiP2pAPI.pingContact(envelope.source);
+      }
+    }
     window.log.info('data message from', this.getEnvelopeId(envelope));
     let p = Promise.resolve();
     // eslint-disable-next-line no-bitwise