Class: DnsOne::Server

Inherits:
Object show all
Defined in:
lib/dns_one/server.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Server

Returns a new instance of Server.



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# File 'lib/dns_one/server.rb', line 8

def initialize 
    @zone_search = ZoneSearch.instance.setup
    @req_log = nil
end

Instance Method Details

#dns_daemon_interfaces ⇒ Object 



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# File 'lib/dns_one/server.rb', line 60

def dns_daemon_interfaces
    if RExec.current_user == 'root'
        Global.conf.interfaces
    else
        ports = Global.conf.interfaces.map do |port|
            if port[2] <= 1024
                Global.logger.warn "Changing listening port #{port.join ':'} to #{port[2] + 10000} for non-root process."
                port[2] += 10000 
            end
            port
        end
        ports
    end
end

#resolve(transaction) ⇒ Object 



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# File 'lib/dns_one/server.rb', line 21

def resolve transaction
    rcode = :NoError
    resp_log = []

    begin
        domain_name = transaction.question.to_s
        ip_address = transaction.options[:peer] rescue nil

        records, from_cache = @zone_search.query domain_name, transaction.resource_class, ip_address

        if records
            if records.empty?
                transaction.fail! :NoError
            else
                records.each do |rec|
                    resp_log << rec
                    transaction.respond! *[rec.val].flatten, {resource_class: rec.res_class, section: rec.section}
                end
            end
        else
            rcode = :NXDomain
            transaction.fail! :NXDomain
        end
    rescue => e
        rcode = :ServFail
    end

    @req_log.on_response *[
        ip_address, 
        domain_name, 
        transaction.resource_class, 
        rcode, 
        resp_log, 
        from_cache
    ]

    raise e if e
end

#run ⇒ Object 



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# File 'lib/dns_one/server.rb', line 75

def run
    srv = self

    RubyDNS::run_server(dns_daemon_interfaces) do
        on(:start) do
            srv.start
        end

        match(/(.+)/) do |transaction|
            srv.resolve transaction
        end

        otherwise do |transaction|
            transaction.fail! :NXDomain
        end
    end
end

#start ⇒ Object 



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# File 'lib/dns_one/server.rb', line 13

def start
    if RExec.current_user == 'root'
        RExec.change_user Global.conf.run_as
    end
    @req_log ||= ReqLog::ReqLog.new
    Global.logger.info "Running as #{RExec.current_user}"
end