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103 lines
3.1 KiB
Ruby
103 lines
3.1 KiB
Ruby
require_dependency 'screening_model'
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# A ScreenedIpAddress record represents an IP address or subnet that is being watched,
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# and possibly blocked from creating accounts.
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class ScreenedIpAddress < ActiveRecord::Base
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include ScreeningModel
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default_action :block
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validates :ip_address, ip_address_format: true, presence: true
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def self.watch(ip_address, opts={})
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match_for_ip_address(ip_address) || create(opts.slice(:action_type).merge(ip_address: ip_address))
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end
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# In Rails 4.0.0, validators are run to handle invalid assignments to inet columns (as they should).
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# In Rails 4.0.1, an exception is raised before validation happens, so we need this hack for
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# inet/cidr columns:
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def ip_address=(val)
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if val.nil?
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self.errors.add(:ip_address, :invalid)
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return
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end
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return write_attribute(:ip_address, val) if val.is_a?(IPAddr)
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num_wildcards = val.count('*')
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if num_wildcards == 0
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write_attribute(:ip_address, val)
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else
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v = val.gsub(/\/.*/, '')
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if v[v.index('*')..-1] =~ /[^\.\*]/
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self.errors.add(:ip_address, :invalid)
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return
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end
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write_attribute(:ip_address, "#{v.gsub('*', '0')}/#{32 - (num_wildcards * 8)}")
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end
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# this gets even messier, Ruby 1.9.2 raised a different exception to Ruby 2.0.0
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# handle both exceptions
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rescue ArgumentError, IPAddr::InvalidAddressError
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self.errors.add(:ip_address, :invalid)
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end
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# Return a string with the ip address and mask in standard format. e.g., "127.0.0.0/8".
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# Ruby's IPAddr class has no method for getting this.
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def ip_address_with_mask
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if ip_address
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mask = ip_address.instance_variable_get(:@mask_addr).to_s(2).count('1')
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if mask == 32
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ip_address.to_s
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else
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"#{ip_address.to_s}/#{ip_address.instance_variable_get(:@mask_addr).to_s(2).count('1')}"
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end
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else
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nil
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end
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end
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def self.match_for_ip_address(ip_address)
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# The <<= operator on inet columns means "is contained within or equal to".
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#
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# Read more about PostgreSQL's inet data type here:
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#
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# http://www.postgresql.org/docs/9.1/static/datatype-net-types.html
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# http://www.postgresql.org/docs/9.1/static/functions-net.html
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find_by("'#{ip_address.to_s}' <<= ip_address")
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end
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def self.should_block?(ip_address)
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exists_for_ip_address_and_action?(ip_address, actions[:block])
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end
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def self.is_whitelisted?(ip_address)
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exists_for_ip_address_and_action?(ip_address, actions[:do_nothing])
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end
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def self.exists_for_ip_address_and_action?(ip_address, action_type)
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b = match_for_ip_address(ip_address)
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b.record_match! if b
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!!b and b.action_type == action_type
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end
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end
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# == Schema Information
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#
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# Table name: screened_ip_addresses
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#
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# id :integer not null, primary key
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# ip_address :inet not null
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# action_type :integer not null
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# match_count :integer default(0), not null
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# last_match_at :datetime
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# created_at :datetime
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# updated_at :datetime
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#
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# Indexes
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#
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# index_screened_ip_addresses_on_ip_address (ip_address) UNIQUE
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# index_screened_ip_addresses_on_last_match_at (last_match_at)
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#
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