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domain.rb
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Sat, Mar 21, 10:07 PM

domain.rb
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class Domain < ActiveRecord::Base
self.inheritance_column = :nx
# List all supported domain types.
def self.domain_types
[
'NATIVE',
'MASTER',
'SLAVE',
]
end
# List domain types that can be created.
def self.allowed_domain_types
domain_types - WebDNS.settings[:prohibit_domain_types]
end
belongs_to :group
has_many :records
# BUG in bump_serial_trigger
has_one :soa, -> { unscope(where: :type) }, class_name: SOA
validates :group_id, presence: true
validates :name, uniqueness: true, presence: true
validates :type, presence: true, inclusion: { in: domain_types }
validates :master, presence: true, ipv4: true, if: :slave?
after_create :generate_soa
after_create :generate_ns
attr_writer :serial_strategy
# Get the zone's serial strategy.
#
# Returns one of the supported serial strategies.
def serial_strategy
@serial_strategy ||= WebDNS.settings[:serial_strategy]
end
# Returns true if this a reverse zone.
def reverse?
name.end_with?('.in-addr.arpa') || name.end_with?('.ip6.arpa')
end
# Returns true if this a ENUM zone.
def enum?
name.end_with?('.e164.arpa')
end
# Returns true if this is a slave zone.
def slave?
type == 'SLAVE'
end
# Compute subnet for reverse records
def subnet
return if not reverse?
if name.end_with?('.in-addr.arpa')
subnet_v4
elsif name.end_with?('.ip6.arpa')
subnet_v6
end
end
private
def subnet_v4
# get ip octets (remove .in-addr.arpa)
octets = name.split('.')[0...-2].reverse
return if octets.any? { |_| false }
mask = 8 * octets.size
octets += [0, 0, 0, 0]
ip = IPAddr.new octets[0, 4].join('.')
[ip, mask].join('/')
end
def subnet_v6
nibbles = name.split('.')[0...-2].reverse
return if nibbles.any? { |_| false }
mask = 4 * nibbles.size
nibbles += [0] * 32
ip = IPAddr.new nibbles[0, 32].in_groups_of(4).map(&:join).join(':')
[ip, mask].join('/')
end
# Hooks
def generate_soa
soa_record = SOA.new(domain: self)
soa_record.save!
end
def generate_ns
return if slave?
return if WebDNS.settings[:default_ns].empty?
WebDNS.settings[:default_ns].each { |ns|
Record.find_or_create_by!(domain: self, type: 'NS', name: '', content: ns)
}
end
end

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