net: remoteAddress always undefined called before connected

PR-URL: #43011
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: y1d7ng

lib/net.js

@@ -733,7 +733,7 @@ Socket.prototype._destroy = function(exception, cb) {
 };
 
 Socket.prototype._getpeername = function() {
-  if (!this._handle || !this._handle.getpeername) {
+  if (!this._handle || !this._handle.getpeername || this.connecting) {
     return this._peername || {};
   } else if (!this._peername) {
     this._peername = {};
@@ -760,7 +760,9 @@ protoGetter('remoteAddress', function remoteAddress() {
 });
 
 protoGetter('remoteFamily', function remoteFamily() {
-  return `IPv${this._getpeername().family}`;
+  const { family } = this._getpeername();
+
+  return family ? `IPv${family}` : family;
 });
 
 protoGetter('remotePort', function remotePort() {

test/parallel/test-net-remote-address-port.js

@@ -53,6 +53,14 @@ const server = net.createServer(common.mustCall(function(socket) {
 server.listen(0, function() {
   const client = net.createConnection(this.address().port, '127.0.0.1');
   const client2 = net.createConnection(this.address().port);
+
+  assert.strictEqual(client.remoteAddress, undefined);
+  assert.strictEqual(client.remoteFamily, undefined);
+  assert.strictEqual(client.remotePort, undefined);
+  assert.strictEqual(client2.remoteAddress, undefined);
+  assert.strictEqual(client2.remoteFamily, undefined);
+  assert.strictEqual(client2.remotePort, undefined);
+
   client.on('connect', function() {
     assert.ok(remoteAddrCandidates.includes(client.remoteAddress));
     assert.ok(remoteFamilyCandidates.includes(client.remoteFamily));