log "bird.log" all;

router id 1;
define epoch = 1;

ipv6 table master6 sorted;

debug tables all;
debug channels all;

protocol device {
	scan time 10;
}

protocol kernel kernel6 {
	scan time 10;
	ipv6 { export all; };
}

protocol static p200 {
	ipv6 { import filter { preference = 200; accept; }; };
	route 2001:db8:eee1::/48 unreachable;
	route 2001:db8:eee2::/48 unreachable;
	route 2001:db8:eee3::/48 unreachable;
	route 2001:db8:eee4::/48 unreachable;
	route 2001:db8:eee5::/48 unreachable;
	route 2001:db8:eee6::/48 unreachable;
	disabled;
}

protocol static p190 {
	ipv6 { import filter { preference = 190; accept; }; };
	route 2001:db8:eee1::/48 unreachable;
	route 2001:db8:eee2::/48 unreachable;
	route 2001:db8:eee3::/48 unreachable;
	route 2001:db8:eee4::/48 unreachable;
	route 2001:db8:eee5::/48 unreachable;
	route 2001:db8:eee6::/48 unreachable;
	disabled;
}

protocol static p180 {
	ipv6 { import filter { preference = 180; accept; }; };
	route 2001:db8:eee1::/48 unreachable;
	route 2001:db8:eee2::/48 unreachable;
	route 2001:db8:eee3::/48 unreachable;
	route 2001:db8:eee4::/48 unreachable;
	route 2001:db8:eee5::/48 unreachable;
	route 2001:db8:eee6::/48 unreachable;
	disabled;
}

protocol static p170 {
	ipv6 { import filter { preference = 170; accept; }; };
	route 2001:db8:eee1::/48 unreachable;
	route 2001:db8:eee2::/48 unreachable;
	route 2001:db8:eee3::/48 unreachable;
	route 2001:db8:eee4::/48 unreachable;
	route 2001:db8:eee5::/48 unreachable;
	route 2001:db8:eee6::/48 unreachable;
	disabled;
}

# We need to CHECK this:
# - adding worst to best
# - adding best to worst
# - removing (both dirs)
# - reconf

function CHECK() -> bool {
  bgp_path.prepend(preference);
  case epoch {
    1: case preference {
      170: return net ~ [ 2001:db8:eee4::/48, 2001:db8:eee5::/48 ];
      180: return net ~ [ 2001:db8:eee3::/48 ];
      190: return net ~ [ 2001:db8:eee2::/48, 2001:db8:eee4::/48 ];
      200: return net ~ [ 2001:db8:eee1::/48, 2001:db8:eee3::/48 ];
      else: return false;
    }
    2: case preference {
      170: return net ~ [ 2001:db8:eee5::/48, 2001:db8:eee6::/48 ];
      180: return net ~ [ 2001:db8:eee4::/48 ];
      190: return net ~ [ 2001:db8:eee3::/48, 2001:db8:eee5::/48 ];
      200: return net ~ [ 2001:db8:eee2::/48, 2001:db8:eee4::/48 ];
      else: return false;
    }
    else: return false;
  }
}

protocol bgp LINK {
  local {{ links["L"]["src"]["ipv6"].ip }} as 1;
  neighbor {{ links["L"]["dest"]["ipv6"].ip }} as 2;
  ipv6 {
    import none;
    export where CHECK();
    secondary;
  };
}