From dcd5c3fd6a25c2adea91bd17be5efe61de2c07d5 Mon Sep 17 00:00:00 2001
From: RoboMagus <68224306+RoboMagus@users.noreply.github.com>
Date: Fri, 3 Feb 2023 15:55:36 +0100
Subject: [PATCH] Disable listening on IPv6 ports when IPv6 is not supported
 (#102)

---
 Dockerfile             |  1 +
 docker/ipv6-disable.sh | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 docker/ipv6-disable.sh

diff --git a/Dockerfile b/Dockerfile
index 91a40c880..cfbb63300 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,6 +56,7 @@ ENV VIKUNJA_SENTRY_ENABLED false
 ENV VIKUNJA_SENTRY_DSN https://85694a2d757547cbbc90cd4b55c5a18d@o1047380.ingest.sentry.io/6024480
 
 COPY docker/injector.sh /docker-entrypoint.d/50-injector.sh
+COPY docker/ipv6-disable.sh /docker-entrypoint.d/60-ipv6-disable.sh
 COPY docker/nginx.conf /etc/nginx/nginx.conf
 COPY docker/templates/. /etc/nginx/templates/
 # copy compiled files from stage 1
diff --git a/docker/ipv6-disable.sh b/docker/ipv6-disable.sh
new file mode 100644
index 000000000..4a9172b54
--- /dev/null
+++ b/docker/ipv6-disable.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+set -e
+
+DEFAULT_CONF_FILE="etc/nginx/conf.d/default.conf"
+
+if [ -f "/proc/net/if_inet6" ]; then
+    echo "info: IPv6 available."
+    exit 0
+fi
+
+echo "info: IPv6 not available!"
+echo "info: Removing IPv6 lines from /$DEFAULT_CONF_FILE"
+sed -i 's/\(listen\s*\[::\].*\)$/#\1 # Disabled IPv6/' /${DEFAULT_CONF_FILE}