net: fix address iteration with autoSelectFamily

When `autoSelectFamily` is set to `true`, `net.connect` is supposed to
try connecting to both IPv4 and IPv6, interleaving the address types.
Instead, it appears that the array that holds the addresses in the order
they should be attempted was never used after being populated.

PR-URL: nodejs#48258
Backport-PR-URL: nodejs#48275
Reviewed-By: Paolo Insogna <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Juan José Arboleda <[email protected]>

Author: indutny

lib/net.js

@@ -1418,7 +1418,7 @@ function lookupAndConnectMultiple(self, async_id_symbol, lookup, host, options,
 
       const context = {
         socket: self,
-        addresses,
+        addresses: toAttempt,
         current: 0,
         port,
         localPort,

test/parallel/test-net-autoselectfamily.js

@@ -117,7 +117,7 @@ function createDnsServer(ipv6Addrs, ipv4Addrs, cb) {
 // Test that only the last successful connection is established.
 {
   createDnsServer(
-    '::1',
+    ['2606:4700::6810:85e5', '2606:4700::6810:84e5', '::1'],
     ['104.20.22.46', '104.20.23.46', '127.0.0.1'],
     common.mustCall(function({ dnsServer, lookup }) {
       const ipv4Server = createServer((socket) => {
@@ -144,7 +144,14 @@ function createDnsServer(ipv6Addrs, ipv4Addrs, cb) {
         connection.on('ready', common.mustCall(() => {
           assert.deepStrictEqual(
             connection.autoSelectFamilyAttemptedAddresses,
-            [`::1:${port}`, `104.20.22.46:${port}`, `104.20.23.46:${port}`, `127.0.0.1:${port}`]
+            [
+              `2606:4700::6810:85e5:${port}`,
+              `104.20.22.46:${port}`,
+              `2606:4700::6810:84e5:${port}`,
+              `104.20.23.46:${port}`,
+              `::1:${port}`,
+              `127.0.0.1:${port}`,
+            ]
           );
         }));