test: fallback to IPv4 if IPv6 is unavailable

openssl seems to default to use IPv6.
This change adds a checks if IPv6 is unavailable and uses IPv4 instead.
On the Node.js CI IBM i build system IPv6 is currently disabled.
This change should resolve the following test case failures:
- https://ci.nodejs.org/job/node-test-commit-ibmi/nodes=ibmi73-ppc64/1085/testReport/(root)/test/sequential_test_tls_psk_client_/
- https://ci.nodejs.org/job/node-test-commit-ibmi/nodes=ibmi73-ppc64/1085/testReport/(root)/test/sequential_test_tls_securepair_client_/

PR-URL: #47017
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Yagiz Nizipli <[email protected]>

Author: abmusse

test/sequential/test-tls-psk-client.js

@@ -14,6 +14,7 @@ const { spawn } = require('child_process');
 const CIPHERS = 'PSK+HIGH';
 const KEY = 'd731ef57be09e5204f0b205b60627028';
 const IDENTITY = 'Client_identity';  // Hardcoded by `openssl s_server`
+const useIPv4 = !common.hasIPv6;
 
 const server = spawn(common.opensslCli, [
   's_server',
@@ -23,6 +24,7 @@ const server = spawn(common.opensslCli, [
   '-psk_hint', IDENTITY,
   '-nocert',
   '-rev',
+  ...(useIPv4 ? ['-4'] : []),
 ], { encoding: 'utf8' });
 let serverErr = '';
 let serverOut = '';

test/sequential/test-tls-securepair-client.js

@@ -38,6 +38,8 @@ const fixtures = require('../common/fixtures');
 const tls = require('tls');
 const spawn = require('child_process').spawn;
 
+const useIPv4 = !common.hasIPv6;
+
 test1();
 
 // simple/test-tls-securepair-client
@@ -64,7 +66,9 @@ function test(keyPath, certPath, check, next) {
   const server = spawn(common.opensslCli, ['s_server',
                                            '-accept', 0,
                                            '-cert', fixtures.path(certPath),
-                                           '-key', fixtures.path(keyPath)]);
+                                           '-key', fixtures.path(keyPath),
+                                           ...(useIPv4 ? ['-4'] : []),
+  ]);
   server.stdout.pipe(process.stdout);
   server.stderr.pipe(process.stdout);