From: Martin Wilck <mwilck@suse.com>
Date: Fri, 3 Feb 2023 20:39:02 +0000 (+0100)
Subject: fix(network): don't assume prefix length 64 by default
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ff255a4488f63cf84179d4572f44fe3a1bd29ec;p=thirdparty%2Fdracut.git

fix(network): don't assume prefix length 64 by default

Assuming a default prefix length of 64 by default if no explicit
prefix length is given is wrong and known to cause connectivity
problems in some networks. A prefix length of 128 should be assumed
in this case.

See https://www.rfc-editor.org/rfc/rfc5942 (specifically section 5)
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684009
---

diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh
index 185df70a9..77d458d80 100755
--- a/modules.d/40network/net-lib.sh
+++ b/modules.d/40network/net-lib.sh
@@ -311,7 +311,7 @@ ibft_to_cmdline() {
                 [ -e "${iface}"/hostname ] && read -r hostname < "${iface}"/hostname
                 if [ "$family" = "ipv6" ]; then
                     if [ -n "$ip" ]; then
-                        [ -n "$prefix" ] || prefix=64
+                        [ -n "$prefix" ] || prefix=128
                         ip="[${ip}]"
                         mask=$prefix
                     fi