From 47d60b9f2429da43c7de6ab9dc897c5896709d5c Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Sun, 9 Aug 2020 15:16:05 -0700
Subject: [PATCH] Leave permanent mappings alone during the update cycle

---
 miss/miss.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/miss/miss.cpp b/miss/miss.cpp
index 1b1b490..af0d2f8 100644
--- a/miss/miss.cpp
+++ b/miss/miss.cpp
@@ -101,6 +101,11 @@ bool UPnPMapPort(struct UPNPUrls* urls, struct IGDdatas* data, int proto, const
         if (!strcmp(intClient, myAddr)) {
             if (atoi(leaseDuration) == 0) {
                 printf("OK (Permanent)" NL);
+
+                // If we have an existing permanent mapping, we can just leave it alone.
+                if (enable) {
+                    return true;
+                }
             }
             else {
                 printf("OK (%s seconds remaining)" NL, leaseDuration);