dn42-router/scripts/convert_bird_to_yaml.rb

require 'yaml'

# protocol bgp ([\d\w]+) from ((?:neo|dn)peers) {[\s\n ]* neighbor (['"]?[a-f0-9:.]+(?:%[\w\d]+)?['"]?) as (\w{3,10});([a-z0-9\n\s{}_,();]+)[\n\s]}

class ParseError < StandardError; end
class NoProtocolConfigurationFound < ParseError; end
class NoProtocolsConfigured < ParseError; end

def parse cnt
    proto_conf = cnt.scan(/protocol bgp ([\d\w_]+) from ((?:neo|dn)peers) {[\s\n ]* neighbor ([a-f0-9:.]+(?: ?% ?['"]?[\w\d._-]+)?['"]?) as (\w{3,10});([a-z0-9\n\s{}_,();]+)[\n\s]}/)
    peers = []

    raise NoProtocolConfigurationFound if proto_conf.length == 0

    proto_conf.each do |peer_old|
        peer = {}
        peer["name"] = peer_old[0]
        peer["template"] = peer_old[1]
        peer["neighbor"] = peer_old[2]
        peer["neighbor_asn"] = peer_old[3].to_i
        ip_conf = peer_old[4].scan(/(ipv[46]) {[\n\s]+import where dn42_import_filter\((\d),(\d{2}),(\d{2})\);[\n\s]+export where dn42_export_filter\((\d),(\d{2}),(\d{2})\);[\n\s]+};/)

        raise NoProtocolsConfigured if ip_conf.length == 0
        raise ParseError, "Too much protocols configured" if ip_conf.length > 2

        peer["protocols"] = []
        ip_conf.each do |conf|
            peer["protocols"] << conf[0]
        end
        peer["bgp_communities"] = {}
        peer["bgp_communities"]["latency"] = ip_conf[0][1].to_i
        peer["bgp_communities"]["bandwidth"] = ip_conf[0][2].to_i
        peer["bgp_communities"]["encryption"] = ip_conf[0][3].to_i
        
        peer["enabled"] = true

        peers << peer
    end

    return peers
end

peers = []

Dir["peers/*.conf"].each do |conf_file|
    begin
        parsed_peers = parse(File.read(conf_file))
        parsed_peers.each do |peer|
            peers << peer
        end
    rescue ParseError => e
        puts "Parse error at file #{conf_file}: #{e.class}!"
    end
end

puts peers.to_yaml