Class: SPF::Mech::MX

Inherits:
SPF::Mech show all
Defined in:
lib/spf/model.rb

Constant Summary collapse

NAME = 
'mx'

Constants inherited from SPF::Mech

DEFAULT_QUALIFIER, EXPLANATION_TEMPLATES_BY_RESULT_CODE, NAME_PATTERN, QUALIFIER_PATTERN

Constants inherited from Term

Term::DOMAIN_END_PATTERN, Term::DOMAIN_SPEC_PATTERN, Term::HEXWORD_PATTERN, Term::IPV4_ADDRESS_PATTERN, Term::IPV6_ADDRESS_PATTERN, Term::MACRO_DELIMITER, Term::MACRO_EXPAND_PATTERN, Term::MACRO_LITERAL_PATTERN, Term::MACRO_STRING_PATTERN, Term::MACRO_TRANSFORMERS_PATTERN, Term::NAME_PATTERN, Term::QNUM_PATTERN, Term::TOPLABEL_PATTERN, Term::TWO_HEXWORDS_OR_IPV4_ADDRESS_PATTERN

Instance Attribute Summary

Attributes inherited from Term

#domain_spec, #errors, #ip_address, #ip_netblocks, #ip_network, #ipv4_prefix_length, #ipv6_prefix_length

Instance Method Summary collapse

Methods inherited from SPF::Mech

#default_ipv4_prefix_length, #default_ipv6_prefix_length, #explain, #explanation_template, #initialize, #match_in_domain, #parse, #parse_end, #parse_name, #parse_qualifier, #qualifier, #to_s

Methods inherited from Term

#domain, #error, #initialize, new_from_string, #parse_domain_spec, #parse_ipv4_address, #parse_ipv4_ipv6_prefix_lengths, #parse_ipv4_network, #parse_ipv4_prefix_length, #parse_ipv6_address, #parse_ipv6_network, #parse_ipv6_prefix_length, #text

Constructor Details

This class inherits a constructor from SPF::Mech

Instance Method Details

#match(server, request, want_result = true) ⇒ Object 



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# File 'lib/spf/model.rb', line 544

def match(server, request, want_result = true)

  server.count_dns_interactive_term(request)

  target_domain = self.domain(server, request)
  mx_packet     = server.dns_lookup(target_domain, 'MX')
  mx_rrs        = (mx_packet[0].answer or server.count_void_dns_lookup(request))

  # Respect the MX mechanism lookups limit (RFC 4408, 5.4/3/4):
  if server.max_name_lookups_per_mx_mech
    mx_rrs = max_rrs[0, server.max_name_lookups_per_mx_mech]
  end

  # TODO: Use A records from packet's "additional" section? Probably not.

  # Check MX records:
  mx_rrs.each do |rr|
    if rr.type == 'MX'
      return true if
        self.match_in_domain(server, request, rr.exchange)
    else
      # Unexpected RR type.
      # TODO: Generate debug info or ignore silently.
    end
  end
  return false
end

#params ⇒ Object 



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# File 'lib/spf/model.rb', line 530

def params
  params = ''
  if @domain_spec
    params += ':' + @domain_spec
  end
  if @ipv4_prefix_length and @ipv4_prefix_length != self.default_ipv4_prefix_length
    params += '/' + @ipv4_prefix_length
  end
  if @ipv6_prefix_length and @ipv6_prefix_length != DEFAULT_IPV6_PREFIX_LENGTH
    params += '//' + @ipv6_prefix_length
  end
  return params
end

#parse_params(required = true) ⇒ Object 



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# File 'lib/spf/model.rb', line 525

def parse_params(required = true)
  self.parse_domain_spec
  self.parse_ipv4_ipv6_prefix_lengths
end