optional ipv6 conf

src/inventory.ts

@@ -443,10 +443,11 @@ class InventoryBuilder {
     //const remoteGatewayMark = remoteGatewayName ? remoteGateway.mark : undefined;
     //console.log(remoteGateway.name);
     let remoteAddress = remoteGateway.address || null;
-    if (!localGateway.ipv6 && !remoteGateway.ipv4 && remoteGateway.ipv6) {
+    const preferV6 = (!remoteGateway.ipv4 || params.ipv6 === 'on') && remoteGateway.ipv6 && params.ipv6 !== 'off';
+    if (!localGateway.ipv6 && preferV6) {
       remoteAddress = null;
     }
-    const resolvedRemoteAddress = remoteAddress ? await this.resolveDomain(remoteAddress, (!remoteGateway.ipv4 || localGateway.ipv6) && remoteGateway.ipv6) : null;
+    const resolvedRemoteAddress = remoteAddress ? await this.resolveDomain(remoteAddress, preferV6) : null;
     const remoteLocalAddress = remote.address;
     const remoteNextMark = remote.nextMark;
     const remoteDestMark = remote.destMark;