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94 lines
2.7 KiB
94 lines
2.7 KiB
# See #SOA |
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# = Start of Authority Record |
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# Defined in RFC 1035. The SOA defines global parameters for the zone (domain). |
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# There is only one SOA record allowed in a zone file. |
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# |
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# Obtained from http://www.zytrax.com/books/dns/ch8/soa.html |
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# |
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class SOA < Record |
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validates :domain, :presence => true |
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validates :domain_id, :uniqueness => true # one SOA per domain |
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validates :name, :presence => true, :hostname => true |
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validate :name_equals_domain_name |
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validates :content, :presence => true |
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validates :primary_ns, :presence => true |
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validates :contact, :email => true |
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validates :serial, :presence => true, :numericality => {:allow_blank => true, :greater_than_or_equal_to => 0} |
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before_validation :assemble_content |
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before_update :update_serial |
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after_initialize :disassemble_content |
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before_validation do |
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self.primary_ns ||= domain.ns_records.first.content |
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end |
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# This allows us to have these convenience attributes act like any other |
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# column in terms of validations |
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attr_accessor :primary_ns, :contact, :serial |
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# Treat contact specially |
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# replacing the first period with an @ if no @'s are present |
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def contact=(email) |
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email.sub!('.', '@') if email.present? && email.index('@').nil? |
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@contact = email |
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end |
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# Hook into #reload |
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def reload_with_content |
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reload_without_content |
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disassemble_content |
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end |
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alias_method_chain :reload, :content |
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# Updates the serial number to the next logical one. Format of the generated |
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# serial is YYYYMMDDNN, where NN is the number of the change for the day. |
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# 01 for the first change, 02 the seconds, etc... |
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# |
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# If the serial number is 0, we opt for PowerDNS's automatic serial number |
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# generation, that gets triggered by updating the change_date |
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def update_serial |
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return if self.content_changed? |
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compute_serial |
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end |
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def reset_serial |
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@serial = nil |
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compute_serial |
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end |
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# Same as #update_serial and saves the record |
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def update_serial! |
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update_serial |
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save |
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end |
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# if SOA record's primary NS is among it's domain's NS records |
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def ns? |
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domain.has_ns?(primary_ns) |
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end |
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def to_label; "#{primary_ns} #{contact}" end |
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private |
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def assemble_content |
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self.content = "#{@primary_ns} #{@contact} #{@serial}".strip |
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end |
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# Update our convenience accessors when the object has changed |
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def disassemble_content |
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@primary_ns, @contact, @serial = content.split(/\s+/) unless content.blank? |
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@serial = @serial.to_i unless @serial.nil? |
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update_serial if @serial.nil? || @serial.zero? |
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end |
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def compute_serial |
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date_serial = Time.now.strftime( "%Y%m%d00" ).to_i |
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@serial = (@serial.nil? || date_serial > @serial) ? date_serial : @serial + 1 |
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end |
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end |
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Soa = SOA
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