From 19e5530a185018d61d20cb29339dc5cdfb748980 Mon Sep 17 00:00:00 2001
From: Andris Reinman <andris@kreata.ee>
Date: Wed, 16 Nov 2016 15:59:20 +0200
Subject: [PATCH] Allow listening on selected interfaces

---
 services/verp-server.js | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/services/verp-server.js b/services/verp-server.js
index e9e6c060..1870c949 100644
--- a/services/verp-server.js
+++ b/services/verp-server.js
@@ -101,15 +101,33 @@ let server = new SMTPServer({
 
 server.on('error', err => {
     log.error('VERP', err.stack);
+    server.close();
 });
 
 module.exports = callback => {
-    if (config.verp.enabled) {
-        server.listen(config.verp.port, () => {
-            log.info('VERP', 'Server listening on port %s', config.verp.port);
-            setImmediate(callback);
-        });
-    } else {
-        setImmediate(callback);
+    if (!config.verp.enabled) {
+        return setImmediate(callback);
     }
+    let hosts;
+    if (typeof config.verp.host === 'string' && config.verp.host) {
+        hosts = config.verp.host.trim().split(',').map(host => host.trim()).filter(host => host.trim());
+        if (hosts.includes('*') || hosts.includes('all')) {
+            hosts = [false];
+        }
+    } else {
+        hosts = [false];
+    }
+
+    let pos = 0;
+    let startNextHost = () => {
+        if (pos >= hosts.length) {
+            return setImmediate(callback);
+        }
+        server.listen(config.verp.port, () => {
+            log.info('VERP', 'Server listening on %s:%s', config.verp.host || '*', config.verp.port);
+            setImmediate(startNextHost);
+        });
+    };
+
+    startNextHost();
 };