libvirtd hook for HOST to GUEST forwarding

I found a minor issue in the hook provided by libvirt documentation regarding Host to Guest forwarding. NOTE: This only applies when the guest is using NAT networking.

Scenario on a CentOS 7 VM host:

A KVM (libvirt) guest provides a specific service on some port, let's say 8080.  The idea is to setup the host to NAT traffic destined to host's ip at a specific port, to the guest IP at a specific host.

Host IP: 192.168.100.10
   port to forward: 8080
Guest: 192.168.122.10
   port listening: 8080

client -> 192.168.100.10:8080 -- Forward --> 192.168.122.10:8080

The libvirt documentation provides the following hook script to deal with exactly this situation:

http://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections

However, there is a problem as the script will never succeed in adding the rules.

The following if statement is never entered as the variable tested against does not match the strings.

   if [ "${2}" = "start" ] || [ "${2}" = "reconnect" ]; then

The variable will contain the word "started" when it hits this if statement.  To fix this, simply add another OR:

   if [ "${2}" = "start" ] || [ "${2}" = "reconnect" ] || [ "${2}" = "started" ]; then

After that change restart libvirtd:

systemctl restart libvirtd

Check to make sure the FORWARD rule was added to the ip chain:

iptables -nL FORWARD 

Note that this does not enable localhost:8080 from the Host to work.  However, the host (in NAT Networking) can still connect to the Guest on its IP at 192.168.122.10:8080

Works well for my purposes.