From ff18e9d277bd9a269c5b1756418c99432860ac32 Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Sat, 20 May 2023 19:17:12 +0200
Subject: network: add IPv6 sysctls for interfaces (sysctl6)

Some IPv6 sysctls are needed under an interface (e.g. proxy_ndp), so
let's add them with the "sysctl6" option name.
---
 sbin/init.d/network | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/sbin/init.d/network b/sbin/init.d/network
index cb16a74..7c97b39 100755
--- a/sbin/init.d/network
+++ b/sbin/init.d/network
@@ -16,6 +16,7 @@
 #     slave <interface*> (implies type=bonding)
 #     bonding <param> <value>
 #     sysctl <var>=<val> (under net or net.ipv4.conf.\$if)
+#     sysctl6 <var>=<val> (under net.ipv6.conf.\$if)
 #     sysset <var>=<val> (under class.net or class.net.\$if)
 #     modprobe <module> <arg*>
 #     load|unload <command> <arg*>
@@ -75,6 +76,7 @@ option	bridge_stp	boolean_option	0
 option	tunnel_type	option_alias_type
 option	type	        standard_option
 option	sysctl		multiple_option
+option	sysctl6		multiple_option
 option	sysset          multiple_option
 option	modprobe 	multiple_option
 option	lladdr		standard_option
@@ -115,6 +117,7 @@ function do_help {
     echo "   - slave <interface*> (implies type=bonding)"
     echo "   - bonding <param> <value>"
     echo "   - sysctl <var>=<val> (under net or net.ipv4.conf.\$if)"
+    echo "   - sysctl6 <var>=<val> (under net.ipv6.conf.\$if)"
     echo "   - sysset <var>=<val> (under class.net or class.net.\$if)"
     echo "   - modprobe <module> <arg*>"
     echo "   - load|unload <command> <arg*>"
@@ -622,7 +625,19 @@ function do_start {
         if [ -e "/proc/sys/net/ipv4/conf/$instname/$sysctl" ]; then
             echo "$value" > "/proc/sys/net/ipv4/conf/$instname/$sysctl"
         else
-            echo "Non-existent network sysctl entry for $instname : $arg"
+            echo "Non-existent IPv4 network sysctl entry for $instname : $arg"
+        fi
+    done
+
+    for arg in "${opt_sysctl6[@]}"; do
+        local sysctl value
+        sysctl="${arg%%=*}"
+        sysctl="${sysctl//.//}"
+        value="${arg##*=}"
+        if [ -e "/proc/sys/net/ipv6/conf/$instname/$sysctl" ]; then
+            echo "$value" > "/proc/sys/net/ipv6/conf/$instname/$sysctl"
+        else
+            echo "Non-existent IPv6 network sysctl entry for $instname : $arg"
         fi
     done
 
-- 
2.35.3