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Implement bird ASPA filters

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Quantum 2024-10-29 01:26:32 -04:00
parent 1de62619c6
commit a1dd233e78
1 changed files with 46 additions and 0 deletions
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filter_aspa.conf Normal file
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function is_aspa_invalid_customer() {
int prev_asn = MY_ASN;
for int cur_asn in bgp_path do {
if prev_asn != cur_asn && is_aspa_invalid_pair(prev_asn, cur_asn) then
return true;
prev_asn = cur_asn;
}
return false;
}
function is_aspa_invalid_peer(int peer_asn) {
int prev_asn = peer_asn;
for int cur_asn in bgp_path do {
if cur_asn != peer_asn && prev_asn != cur_asn &&
is_aspa_invalid_pair(prev_asn, cur_asn) then
return true;
prev_asn = cur_asn;
}
return false;
}
function is_aspa_invalid_upstream() {
int prev_asn = MY_ASN;
int max_up_ramp = bgp_path.len;
int min_down_ramp = 0;
int i = 0;
for int cur_asn in bgp_path do {
if prev_asn != cur_asn then {
if is_aspa_invalid_pair(cur_asn, cur_asn) && max_up_ramp > i then
max_up_ramp = i;
if is_aspa_invalid_pair(prev_asn, cur_asn) && min_down_ramp < i then
min_down_ramp = i;
}
prev_asn = cur_asn;
i = i + 1;
}
return min_down_ramp > max_up_ramp;
}