check for localhost ip and ignore link-local v6, i think you need to specify an interface

1a1ab1d18a5f0a586616326fff29f1de091d1317

BPplays <andymalbp@gmail.com>

server.js+19 -6 Viewed

 import responseTime from 'response-time';
 import helmet from 'helmet';
 import bodyParser from 'body-parser';
 +import { getMatch, IPMatch, IPSubnetwork, IPRange, matches } from 'ip-matching';
 // net related library imports
 import fetch from 'node-fetch';

 async function getHasIP() {
     let hasIPv6 = false;
 +    let hasIPv6Local = false;
     let hasIPv4 = false;
 +    let hasIPv4Local = false;
     const interfaces = os.networkInterfaces();
 +    const linkLocalV6 = getMatch('fe80::/10');
     for (const iface of Object.values(interfaces)) {
         if (iface === undefined) {
             continue;
+        }
         for (const info of iface) {
             if (info.family === 'IPv6' && !linkLocalV6.matches(info.address)) {
                 hasIPv6 = true;
 +                if (info.internal === true) {
 +                    hasIPv6Local = true;
 +                }
+            }
             if (info.family === 'IPv4') {
                 hasIPv4 = true;
 +                if (info.internal === true) {
 +                    hasIPv4Local = true;
 +                }
+            }
             if (hasIPv6 && hasIPv4 && hasIPv6Local && hasIPv4Local) break;
+        }
         if (hasIPv6 && hasIPv4 && hasIPv6Local && hasIPv4Local) break;
+    }
     return [hasIPv6, hasIPv4, hasIPv6Local, hasIPv4Local];
+}
 app.use(cookieSession({

 async function startServer() {
     let useIPv6 = (enableIPv6 === true);
     let useIPv4 = (enableIPv4 === true);
     let hasIPv6, hasIPv4, hasIPv6Local, hasIPv4Local, hasIPv6NonLocal, hasIPv4NonLocal;
     if (enableIPv6 === 'auto' || enableIPv4 === 'auto') {
         [hasIPv6hasIPv6NonLocal, hasIPv4hasIPv4NonLocal, hasIPv6Local, hasIPv4Local] = await getHasIP();
++
 +        hasIPv6 = listen ? hasIPv6NonLocal : hasIPv6Local;
         if (enableIPv6 === 'auto') {
             useIPv6 = hasIPv6;
+        }

@@ -947,6 +959,7 @@ async function startServer() {
947	959	}
948	960
949	961
	962	+ hasIPv4 = listen ? hasIPv4NonLocal : hasIPv4Local;
950	963	if (enableIPv4 === 'auto') {
951	964	useIPv4 = hasIPv4;
952	965	}