116 lines
4.2 KiB
Plaintext
116 lines
4.2 KiB
Plaintext
function pub_add_communities(int ASN; int PeerType) {
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# DIRECT PEER
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if (PeerType=0) then {
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if bgp_large_community !~ [(LOCAL_ASN, 110, *)] then {
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bgp_large_community.add((LOCAL_ASN, 110, 0));
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bgp_large_community.add((LOCAL_ASN, 110, 2));
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}
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# PEER via IX
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} else if (PeerType=1) then {
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if bgp_large_community !~ [(LOCAL_ASN, 110, *)] then {
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bgp_large_community.add((LOCAL_ASN, 110, 0));
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bgp_large_community.add((LOCAL_ASN, 110, 1));
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}
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# UPSTREAM
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}else if (PeerType=10) then {
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if bgp_large_community !~ [(LOCAL_ASN, 110, *)] then bgp_large_community.add((LOCAL_ASN, 110, 10));
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# DOWNSTREAM
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} else if (PeerType=20) then {
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if bgp_large_community !~ [(LOCAL_ASN, 110, *)] then bgp_large_community.add((LOCAL_ASN, 110, 20));
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# Self Route
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} else if (PeerType=30) then {
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if bgp_large_community !~ [(LOCAL_ASN, 110, *)] then bgp_large_community.add((LOCAL_ASN, 110, 30));
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}
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# Finished (LOCAL_ASN, 110, *);
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if bgp_large_community !~ [(LOCAL_ASN, 120, *)] then bgp_large_community.add((LOCAL_ASN, 120, POP));
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if bgp_large_community !~ [(LOCAL_ASN, 121, *)] then bgp_large_community.add((LOCAL_ASN, 121, REGION));
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# Finished (LOCAL_ASN, 120~130, *);
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return true;
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}
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function pub_preprocess_communities() {
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if (LOCAL_ASN, 115, 1) ~ bgp_large_community then bgp_path.prepend(LOCAL_ASN);
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if (LOCAL_ASN, 115, 3) ~ bgp_large_community then {
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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}
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if (LOCAL_ASN, 115, 5) ~ bgp_large_community then {
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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}
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# Finished (LOCAL_ASN, 115, *);
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return true;
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}
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function pub_process_communities(int ASN; int PeerType) {
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if (65535, 65281) ~ bgp_community then return false;
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if (65535, 65282) ~ bgp_community then return false;
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if (65535, 65283) ~ bgp_community then return false;
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if (LOCAL_ASN, 2, ASN) ~ bgp_large_community then return false;
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# PEER
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if (PeerType<10) then {
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if (LOCAL_ASN, 1, 1) ~ bgp_large_community then return false;
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# UPSTREAM
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} else if (PeerType=10) then {
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if (LOCAL_ASN, 1, 0) ~ bgp_large_community then return false;
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# DOWNSTREAM
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} else if (PeerType=20) then {
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if (LOCAL_ASN, 1, 2) ~ bgp_large_community then return false;
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}
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return true;
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}
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function pub_process_path() {
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# Delete Self eBGP Confed Path.
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bgp_path.delete([4200000000..4225479999]);
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# Route is via or locate Europe & Africa & Middle East
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if bgp_large_community ~ [(LOCAL_ASN, 122, 100), (LOCAL_ASN, 122, 300..310), (LOCAL_ASN, 122, 600), (LOCAL_ASN, 121, 100), (LOCAL_ASN, 121, 300..310), (LOCAL_ASN, 121, 600)] then bgp_path.prepend(LOCAL_ASN);
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# Route is via or locate America
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if bgp_large_community ~ [(LOCAL_ASN, 122, 200..299), (LOCAL_ASN, 121, 200..299)] then bgp_path.prepend(LOCAL_ASN);
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# Route is via or locate East Asia & Oceania
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if bgp_large_community ~ [(LOCAL_ASN, 122, 400..500), (LOCAL_ASN, 121, 200..299)] then bgp_path.prepend(LOCAL_ASN);
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# Self PoP
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if (LOCAL_ASN, 120, POP) ~ bgp_large_community then {
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bgp_path.delete(LOCAL_ASN);
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bgp_path.prepend(LOCAL_ASN);
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}
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pub_preprocess_communities();
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}
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function transit_import_filter(int ASN) {
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if !is_valid() then return false;
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pub_add_communities(ASN, 10);
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pub_preprocess_communities();
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bgp_local_pref = 400 - bgp_path.len * 10;
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if LOCAL_ASN ~ bgp_path then bgp_local_pref = 1;
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pub_route_controller_specific();
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return true;
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}
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function transit_export_filter(int ASN) {
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pub_process_path();
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if !is_valid() then return false;
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if bgp_large_community ~ [(LOCAL_ASN, 110, 0), (LOCAL_ASN, 110, 10)] then return false;
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if bgp_path.last !~ DOWNSTREAM_ASN && source = RTS_BGP then {
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print "transit exporter: for ", net, " ASN ", bgp_path.last;
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return false;
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}
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pub_add_communities(ASN, 30);
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if pub_process_communities(ASN, 10) then return true;
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else return false;
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} |