{# Build list of links for this switch #}
{% set switch_links = [] %}
{% set link_idx = namespace(value=0) %}
{% for link in topology.links %}
{% if link.local == vm_name %}
{% set _ = switch_links.append({'port': link.local_port, 'remote': link.remote, 'remote_port': link.remote_port, 'udp_local': udp_base_port + (link_idx.value * 2), 'udp_remote': udp_base_port + (link_idx.value * 2) + 1}) %}
{% endif %}
{% if link.remote == vm_name %}
{% set _ = switch_links.append({'port': link.remote_port, 'remote': link.local, 'remote_port': link.local_port, 'udp_local': udp_base_port + (link_idx.value * 2) + 1, 'udp_remote': udp_base_port + (link_idx.value * 2)}) %}
{% endif %}
{% set link_idx.value = link_idx.value + 1 %}
{% endfor %}
{# Add server links #}
{% set server_link_start = topology.links | length %}
{% for server in servers | default([]) %}
{% if server.connected_to == vm_name %}
{% set _ = switch_links.append({'port': server.switch_port, 'remote': server.name, 'remote_port': 'eth1', 'udp_local': udp_base_port + ((server_link_start + loop.index0) * 2), 'udp_remote': udp_base_port + ((server_link_start + loop.index0) * 2) + 1}) %}
{% endif %}
{% endfor %}
<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>{{ vm_name }}</name>
  <memory unit='MiB'>{{ switch_memory_mb }}</memory>
  <vcpu placement='static'>{{ switch_vcpus }}</vcpu>
  <os>
    <type arch='x86_64' machine='pc-q35-8.2'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none' migratable='on'/>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='{{ vm_disk_path }}/{{ vm_name }}.qcow2'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <controller type='usb' model='none'/>
    <serial type='pty'>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <memballoon model='none'/>
  </devices>

  <!-- QEMU command line arguments for networking -->
  <qemu:commandline>
    <!-- Management interface with SSH port forwarding -->
    <qemu:arg value='-netdev'/>
    <qemu:arg value='user,id=mgmt,net=192.168.100.0/24,hostfwd=tcp::{{ mgmt_ssh_base_port + vm_index | int }}-:22'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='virtio-net-pci,netdev=mgmt,mac=52:54:00:00:{{ "%02x" | format(vm_index | int) }}:00'/>

{% for link in switch_links %}
    <!-- {{ link.port }} <-> {{ link.remote }}:{{ link.remote_port }} -->
    <qemu:arg value='-netdev'/>
    <qemu:arg value='socket,id={{ link.port | replace("/", "_") }},udp=127.0.0.1:{{ link.udp_remote }},localaddr=127.0.0.1:{{ link.udp_local }}'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='virtio-net-pci,netdev={{ link.port | replace("/", "_") }},mac=52:54:{{ "%02x" | format(vm_index | int) }}:{{ "%02x" | format(loop.index) }}:{{ "%02x" | format((link.udp_local // 256) % 256) }}:{{ "%02x" | format(link.udp_local % 256) }}'/>

{% endfor %}
  </qemu:commandline>
</domain>