Debian: dhclient set the IPv6 prefix length for the addresses

During AIO-DX IPv6 node installation, the management address for
controller-1 set by dhclient receives a "/128" prefix length. The
cause comes from DHCPv6, which does not inform a prefix length on its
negotiation. The prefix should be learned via RA messages.

Since the internode IPv6 communications in StarlingX do not contain
a router and RA is in principle disabled on the management network,
we must set the system with the default prefix length of 64. A similar
patch was done for Centos.

Test Plan
[PASS] Install AIO-DX on IPv6 network, it is correctly setting the
       controller-1 mgmt ip address after the first boot.

Story: 2009968
Task: 46184


Signed-off-by: Andre Fernando Zanella Kantek <AndreFernandoZanella.Kantek@windriver.com>
Change-Id: I2fce4e7fce7f4e1fd6902d24330d7621b238031a

base/dhcp/debian/deb_patches/0003-Use-prefixlen-for-IPv6-address-operations.patch

@@ -0,0 +1,40 @@
+From 42a0e83df41494cc67157f98b18a4087f6853911 Mon Sep 17 00:00:00 2001
+From: Andre Fernando Zanella Kantek
+ <AndreFernandoZanella.Kantek@windriver.com>
+Date: Thu, 1 Sep 2022 10:05:09 -0300
+Subject: [PATCH] Use prefixlen for IPv6 address operations
+
+use the prefix length variable available to the script to correctly
+set the address passed by the dhclient program.
+
+
+Signed-off-by: Andre Fernando Zanella Kantek <AndreFernandoZanella.Kantek@windriver.com>
+---
+ debian/dhclient-script.linux | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/debian/dhclient-script.linux b/debian/dhclient-script.linux
+index 8b29988..915cc13 100644
+--- a/debian/dhclient-script.linux
++++ b/debian/dhclient-script.linux
+@@ -403,7 +403,7 @@ case "$reason" in
+ 
+         if [ "${new_ip6_address}" ]; then
+             # set leased IP
+-            ip -6 addr add ${new_ip6_address} \
++            ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
+                 dev ${interface} scope global
+         fi
+ 
+@@ -429,7 +429,7 @@ case "$reason" in
+         fi
+ 
+         # delete leased IP
+-        ip -6 addr del ${old_ip6_address} \
++        ip -6 addr del ${old_ip6_address}/${old_ip6_prefixlen} \
+             dev ${interface}
+ 
+         ;;
+-- 
+2.17.1
+

base/dhcp/debian/deb_patches/series

@@ -1,2 +1,3 @@
 0001-dhclient-dhcp6-set-hostname.patch
 0002-Update-dn-and-dns-only-with-diff-upon-RENEW.patch
+0003-Use-prefixlen-for-IPv6-address-operations.patch

base/dhcp/debian/patches/dhclient-set-the-default-prefix-length-to-64.patch

@@ -0,0 +1,33 @@
+From 45595a9851a6e09d17a6fc9006b7ddb3b8539756 Mon Sep 17 00:00:00 2001
+From: Andre Fernando Zanella Kantek
+ <AndreFernandoZanella.Kantek@windriver.com>
+Date: Thu, 1 Sep 2022 10:26:19 -0300
+Subject: [PATCH] Set the default prefix length to 64
+
+Since the StarlingX internode communication happens without a L3 router,
+the hosts will not be able to see each other with prefix length of 128.
+
+This commit sets the default value to 64
+
+
+Signed-off-by: Andre Fernando Zanella Kantek <AndreFernandoZanella.Kantek@windriver.com>
+---
+ includes/site.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/includes/site.h b/includes/site.h
+index 2ef69e4..ca2ec6a 100644
+--- a/includes/site.h
++++ b/includes/site.h
+@@ -285,7 +285,7 @@
+    is a host address and doesn't include any on-link information.
+    64 indicates that the first 64 bits are the subnet or on-link
+    prefix. */
+-#define DHCLIENT_DEFAULT_PREFIX_LEN 128
++#define DHCLIENT_DEFAULT_PREFIX_LEN 64
+ 
+ /* Enable the gentle shutdown signal handling.  Currently this
+    means that on SIGINT or SIGTERM a client will release its
+-- 
+2.17.1
+

base/dhcp/debian/patches/series

@@ -1,3 +1,4 @@
 dhclient-restrict-interfaces-to-command-line.patch
 dhclient-ipv6-bind-to-interface.patch
 dhclient-ipv6-conditionally-set-hostname.patch
+dhclient-set-the-default-prefix-length-to-64.patch