# Set to true if this peer is directly connected to a dn42 peer
define is_dn42_peer = true;
# If we are connected directly to dn42, we don't want the dn42 routes from others
define import_dn42 = !is_dn42_peer;
define export_dn42 = is_dn42_peer;

template bgp tnet_tpl {
  local    as 4242423538;
  neighbor internal;

  direct;

  password "trygvis";

  ipv6 {
    next hop self;
    import filter {
      if is_tnet() then {
        accept proto, ": (tnet) import accept, net=", net, ", from=", from, ", gw=", gw;
      } else if import_dn42 && dn42_is_valid_network() then {
        accept proto, ": (dn42) import accept, net=", net, ", from=", from, ", gw=", gw;
      } else {
        reject proto, ": import reject, reason=not tnet";
      }
    };
    # newer bird's only
    # import keep filtered;
    export filter {
      if is_tnet() then {
        accept proto, ": (tnet) export accept, net=", net, ", from=", from, ", gw=", gw;
      } else if export_dn42 && dn42_is_valid_network() then {
        accept proto, ": (dn42) import accept, net=", net, ", from=", from, ", gw=", gw;
      } else {
        reject proto, ": export reject, reason=not tnet";
      }
    };
  };
}
{% for p in tnet_bird_peers|default([])|sort %}
{% set peer = tnet_bird_peers[p] %}
{% set policy = peer.policy | default("tnet") %}

{% if policy == "tnet" %}
protocol bgp tnet_{{ p }} from tnet_tpl {
  neighbor {{ hostvars[p].tnet_wg[inventory_hostname].address }};
  interface "tnet-{{ p }}";
{% if peer.rr_client|default(False) %}

  rr client;
{% endif %}
}
{% elif policy == "dn42" %}
protocol bgp {{ p }} {
  local    as 4242423538;
  neighbor {{ peer.address }};
  neighbor as {{ peer.as }};
{% if peer.interface is defined %}
  interface "{{ peer.interface }}";
{% endif %}

  ipv6 {
    import filter {
      if dn42_is_valid_network() && (net !~ tnet) then {
        # Check when unknown or invalid according to ROA
        if (roa_check(dn42_roa, net, bgp_path.last) = ROA_VALID) then {
          accept;
        } else {
          reject proto, "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
        }
      } else {
        reject proto, "[dn42] invalid dn42 network ", net, " ASN ", bgp_path.last;
      }
    };
    export filter {
      if net ~ tnet then {
        accept proto, "[dn42] accepting export tnet: ", net;
      } else {
        reject proto, "[dn42] rejecting export: ", net;
      }
    };
  };
}
{% endif %}
{% endfor %}