In case it's useful, I'm posting here the libvirt/qemu network configuration I
used to try the above patches out.
- Ken.
## Here's a libvirt network config with NAT configured for both IPv4 and IPv6.
## The ULA range is randomly chosen.
# cat /etc/libvirt/qemu/networks/dhcptest.xml
<network>
<name>dhcptest</name>
<forward mode='nat'>
<nat>
<port start='1024' end='65535'/>
</nat>
</forward>
<bridge name='virbr1' stp='on' delay='0'/>
<domain name='dhcptest.home.arpa'/>
<ip address='192.168.100.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.168.100.128' end='192.168.100.254'/>
</dhcp>
</ip>
<ip family='ipv6' address='fd3a:d614:cde6:b03e::1' prefix='64'>
<dhcp>
<range start='fd3a:d614:cde6:b03e::100' end='fd3a:d614:cde6:b03e::1ff'/>
</dhcp>
</ip>
</network>
## Here's the interfaces file for debian running inside qemu.
## Various combinations of {inet,inet6} {static,dhcp} can be tested.
# cat /etc/network/interfaces
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
iface eth0 inet6 dhcp
#iface eth0 inet static
# address 192.168.100.37/24
# gateway 192.168.100.1
# dns-nameservers 192.168.100.1
#iface eth0 inet6 static
# address fd3a:d614:cde6:b03e::37/128
# gateway fd3a:d614:cde6:b03e::1
# dns-nameservers fd3a:d614:cde6:b03e::1
## Then, e.g.
# resolvectl
Global
Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub
Link 2 (eth0)
Current Scopes: DNS
Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
DNS Servers: fd3a:d614:cde6:b03e::1 192.168.100.1
DNS Domain: dhcptest.home.arpa
Link 3 (eth1)
Current Scopes: none
Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
