#
# {{ site }} / {{ network }} FASTd configuration (Salt managed)
#
{%- set node_config = salt['pillar.get']('nodes:' ~ grains['id']) %}
{%- set meshif = "meshif" %}
{%- if grains.oscodename != "buster" %}
  {%- set meshif = "-m" %}
{%- endif %}

log to syslog level info;

interface "{{ site }}_{{ network }}";

{% if network_type == 'nodes' and 'batman_gw' in node_config.get ('roles') %}
method "null";			# Null-cipher for node VPNs
{%- endif %}
{%- if 'aes' in grains.cpu_flags and grains.oscodename not in [ "stretch" ] %}
method "aes128-gcm";
method "aes128-ctr+umac";
{%- else %}
#method "aes128-gcm";		# Not supported by CPU on this machine
#method "aes128-ctr+umac";	# Not supported by CPU on this machine
{%- endif %}
method "salsa2012+umac";

{# Calculating FASTd port depending on network_type #}
{%- set port = -1 %}
{%- if network_type == 'nodes' %}
  {%- set port = 10000 + site_no|int %}
{%- elif network_type == 'intergw' %}
  {%- set port = 11000 + site_no|int %}
{%- endif %}

{%- if network in ['nodes4', 'intergw'] %}
bind 0.0.0.0:{{ port }} interface "vrf_external";
{%- endif %}
{%- if network in ['nodes6', 'intergw'] %}
bind [::]:{{ port }} interface "vrf_external";
{%- endif %}

# Mark packets to make sure they are associated to VRF vrf_external.
# Specifying the interface and setsockopt() isn't enough for fastd.
packet mark 0x1023;

secret "{{ secret }}";
mtu 1406;

status socket "/var/run/fastd.{{ site }}_{{ network }}.sock";

on up "
	ip link set $INTERFACE down
	ip link set address {{ mac_address }} dev $INTERFACE
	ip link set $INTERFACE up

	batctl {{ meshif }} {{ bat_iface }} if add $INTERFACE
{%- if grains.oscodename == "buster" or 'batman-iface-penalty' in node_config.get ('tags', []) %}
	# Make VPN more expensive than intra DC/DCI/WBBL links
	batctl hardif $INTERFACE hop_penalty 50
{%- endif %}
";

on down "
	batctl {{ meshif }} {{ bat_iface }} if del $INTERFACE
";

{%- if network_type == 'nodes' %}
on verify "/etc/fastd/verify-peer.sh $PEER_KEY $PEER_ADDRESS";

  {%- if peer_limit %}
peer limit {{ peer_limit }};
  {%- endif %}
{%- elif network_type == 'intergw' %}

#
# Set up Inter-Gw-VPN link to all nodes of this site
  {%- set node_is_gw = True if grains.id.startswith('gw') else False %}
  {%- for peer, peer_config in salt['pillar.get']('nodes').items ()|sort if peer != grains.id %}
    {%- if site not in peer_config.get ('sites', {}) %}{% continue %}{% endif %}
    {%- if 'fastd' not in peer_config %}{% continue %}{% endif %}

    {#- non gw nodes are only allowed to connect to gw peers #}
    {%- set peer_is_gw = True if peer.startswith('gw') else False %}
    {%- if not node_is_gw and not peer_is_gw %}{% continue %}{% endif %}

# Peer config for {{ peer }}
peer "{{ peer }}" {
	key "{{ peer_config.get('fastd', {}).get('intergw_pubkey') }}";
    {%- if peer_is_gw %}
      {%- set ips = salt['ffho_net.get_node_iface_ips'](peer_config, 'vrf_external') %}

      {#- set peer IPv4 address #}
      {%- for ipv4 in ips['v4'] %}
	remote {{ ipv4 }}:{{ port }};
      {%- endfor %}

      {#- set peer IPv6 address if node has IPv6 #}
      {%- for ipv6 in ips['v6'] %}
	remote [{{ ipv6 }}]:{{ port }};
      {%- endfor %}
    {%- endif %}
}
  {%- endfor %}
{%- endif %}