1 files changed, 136 insertions, 0 deletions
diff --git a/roles/uvok_bird/files/clear_filters.conf b/roles/uvok_bird/files/clear_filters.conf
new file mode 100644
index 0000000..f78ba9e
--- /dev/null
+++ b/roles/uvok_bird/files/clear_filters.conf
@@ -0,0 +1,136 @@
+# managed by Ansible
+
+## IMPORT FILTERS
+
+define BOGON_ASNS = [
+  0,                      # RFC 7607
+  23456,                  # RFC 4893 AS_TRANS
+  64496..64511,           # RFC 5398 and documentation/example ASNs
+  64512..65534,           # RFC 6996 Private ASNs
+  65535,                  # RFC 7300 Last 16 bit ASN
+  65536..65551,           # RFC 5398 and documentation/example ASNs
+  65552..131071,          # RFC IANA reserved ASNs
+  4200000000..4294967294, # RFC 6996 Private ASNs
+  4294967295 ];           # RFC 7300 Last 32 bit ASN
+
+define BOGON_PREFIXES = [ ::/0,                          # Default route
+                          ::/8+,                         # RFC 4291 IPv4-compatible, loopback, et al
+                          0100::/64+,                    # RFC 6666 Discard-Only
+                          2001:2::/48+,                  # RFC 5180 BMWG
+                          2001:10::/28+,                 # RFC 4843 ORCHID
+                          2001:db8::/32+,                # RFC 3849 documentation
+                          2002::/16+,                    # RFC 7526 6to4 anycast relay
+                          3ffe::/16+,                    # RFC 3701 old 6bone
+                          fc00::/7+,                     # RFC 4193 unique local unicast
+                          fe80::/10+,                    # RFC 4291 link local unicast
+                          fec0::/10+,                    # RFC 3879 old site local unicast
+                          ff00::/8+                      # RFC 4291 multicast
+];
+
+# not supported (yet???)
+# -> bool {
+function is_default_route() {
+    case net.type {
+        NET_IP4: return net = 0.0.0.0/0;
+        NET_IP6: return net = ::/0;
+        else:    return false;
+    }
+}
+
+function accept_default_route() {
+    if is_default_route() then accept;
+}
+
+function reject_bogon_asns()
+int set bogon_asns;
+{
+  bogon_asns = BOGON_ASNS;
+
+  if ( bgp_path ~ bogon_asns ) then {
+    print "Reject: bogon AS_PATH: ", net, " ", bgp_path;
+    clearnet_add_filter(FILTER_BOGON_ASN);
+  }
+}
+
+function reject_bogon_prefixes()
+prefix set bogon_prefixes;
+{
+    bogon_prefixes = BOGON_PREFIXES;
+    if (net ~ bogon_prefixes) then {
+        print "Reject: Bogon prefix: ", net, " ", bgp_path;
+        clearnet_add_filter(FILTER_BOGON_PREFIX);
+    }
+}
+
+define PROBLEM_PREFIXES = [
+];
+
+function reject_problem_prefixes()
+prefix set problem_prefixes;
+{
+    problem_prefixes = PROBLEM_PREFIXES;
+    if (net ~ problem_prefixes) then {
+        print "Reject: Problematic prefix: ", net, " ", bgp_path;
+        clearnet_add_filter(FILTER_PROBLEM_PREFIX);
+    }
+}
+
+function reject_long_aspaths()
+{
+    if ( bgp_path.len > 15 ) then {
+        clearnet_add_filter(FILTER_LONG_ASPATH);
+    }
+}
+
+function reject_small_prefixes()
+{
+  if (net.len > 55 && net.type = NET_IP6) then {
+    print "Reject: Too small prefix: ", net, " ", bgp_path;
+    clearnet_add_filter(FILTER_SMALL_V6_PREFIX);
+  }
+}
+
+function reject_roa_rpki()
+{
+    if ( roa_check(clear_roa_v6, net, bgp_path.last_nonaggregated) = ROA_INVALID ) then {
+        clearnet_add_filter(FILTER_ROA_RPKI);
+    }
+}
+
+function prefer_direct_neighbor()
+{
+    if (bgp_path.len = 1) then
+        bgp_local_pref = bgp_local_pref + 700;
+}
+
+
+function clearnet_common_import() {
+    reject_bogon_asns();
+    reject_bogon_prefixes();
+    reject_long_aspaths();
+    reject_small_prefixes();
+    reject_problem_prefixes();
+    reject_roa_rpki();
+    prefer_direct_neighbor();
+    honor_graceful_shutdown();
+}
+
+## EXPORT FILTERS
+
+filter myas_export
+{
+    if (proto = "myprefix") then {
+        accept;
+    }
+    reject;
+}
+
+# route collector
+filter myas_f_rc
+{
+# export IXP routes after all
+#    if ( clearnet_is_ixp() ) then reject;
+    if (source = RTS_BGP) then accept;
+    if (proto = "myprefix") then accept;
+    reject;
+};