https:/birdconf.md
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+#############################################
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+# Variable header #
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+################################################
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+
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+
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+define OWNAS = 4242422322;
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+define OWNIP = 172.22.181.193;
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+define OWNIPv6 = fd42:4242:2322::1;
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+define OWNNET = 172.22.181.192/27;
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+define OWNNETv6 = fd42:4242:2322::/48;
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+define OWNNETSET = [172.22.181.192/27+];
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+define OWNNETSETv6 = [fd42:4242:2322::/48+];
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+
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+################################################
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+# Header end #
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+################################################
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+
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+router id OWNIP;
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+
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+protocol device {
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+ scan time 10;
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+}
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+
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+/*
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+ * Utility functions
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+ */
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+
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+function is_self_net() {
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+ return net ~ OWNNETSET;
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+}
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+
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+function is_self_net_v6() {
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+ return net ~ OWNNETSETv6;
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+}
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+
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+function is_valid_network() {
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+ return net ~ [
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+ 172.20.0.0/14{21,29}, # dn42
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+ 172.20.0.0/24{28,32}, # dn42 Anycast
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+ 172.21.0.0/24{28,32}, # dn42 Anycast
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+ 172.22.0.0/24{28,32}, # dn42 Anycast
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+ 172.23.0.0/24{28,32}, # dn42 Anycast
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+ 172.31.0.0/16+, # ChaosVPN
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+ 10.100.0.0/14+, # ChaosVPN
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+ 10.0.0.0/8{15,24} # Freifunk.net
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+ ];
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+}
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+
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+roa4 table dn42_roa;
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+roa6 table dn42_roa_v6;
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+
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+protocol static {
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+ roa4 { table dn42_roa; };
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+ include "/etc/bird/roa4.conf";
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+};
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+
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+protocol static {
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+ roa6 { table dn42_roa_v6; };
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+ include "/etc/bird/roa6.conf";
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+};
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+
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+function is_valid_network_v6() {
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+ return net ~ [
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+ fd00::/8{44,64} # ULA address space as per RFC 4193
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+ ];
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+}
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+
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+protocol kernel {
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+ scan time 20;
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+
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+ ipv6 {
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+ import none;
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+ export filter {
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+ if source = RTS_STATIC then reject;
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+ krt_prefsrc = OWNIPv6;
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+ accept;
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+ };
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+ };
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+};
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+
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+protocol kernel {
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+ scan time 20;
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+
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+ ipv4 {
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+ import none;
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+ export filter {
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+ if source = RTS_STATIC then reject;
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+ krt_prefsrc = OWNIP;
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+ accept;
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+ };
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+ };
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+}
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+
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+protocol static {
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+ route OWNNET reject;
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+
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+ ipv4 {
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+ import all;
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+ export none;
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+ };
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+}
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+
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+protocol static {
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+ route OWNNETv6 reject;
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+
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+ ipv6 {
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+ import all;
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+ export none;
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+ };
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+}
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+
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+template bgp dnpeers {
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+ local as OWNAS;
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+ path metric 1;
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+
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+ ipv4 {
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+ import filter {
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+ if is_valid_network() && !is_self_net() then {
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+ if (roa_check(dn42_roa, net, bgp_path.last) != ROA_VALID) then {
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+ print "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
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+ reject;
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+ } else accept;
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+ } else reject;
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+ };
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+
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+ export filter { if is_valid_network() then accept; else reject; };
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+ import limit 1000 action block;
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+ };
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+
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+ ipv6 {
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+ import filter {
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+ if is_valid_network_v6() && !is_self_net_v6() then {
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+ if (roa_check(dn42_roa_v6, net, bgp_path.last) != ROA_VALID) then {
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+ print "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
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+ reject;
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+ } else accept;
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+ } else reject;
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+ };
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+ export filter { if is_valid_network_v6() then accept; else reject; };
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+ import limit 1000 action block;
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+ };
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+}
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+
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+
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+include "/etc/bird/peers/*";
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+
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+log syslog { debug, trace, info, remote, warning, error, auth, fatal, bug };
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+log stderr all;
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+#log "/home/bird/bird.log" all;
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+#log "/root/bird.log" all;