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Versions: 14
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Contents
# encoding: binary
module Rex
module Proto
# SIP protocol support
module SIP
SIP_STATUS_REGEX = /^SIP\/(\d\.\d) (\d{3})\s*(.*)$/
# Represents a generic SIP message
class Message
attr_accessor :headers
def initialize
@headers = {}
end
# Returns a list of all values from all +name+ headers, regardless of case,
# or nil if no matching header is found
def header(name)
matches = @headers.select { |k, _| k.downcase == name.downcase }
return nil if matches.empty?
matches.values.flatten
end
# Returns a hash of header name to values mapping
# from the provided message, or nil if no headers
# are found
def self.extract_headers(message)
pairs = message.scan(/^([^\s:]+):\s*(.*)$/)
return nil if pairs.empty?
headers = {}
pairs.each do |pair|
headers[pair.first] ||= []
headers[pair.first] << pair.last.strip
end
headers
end
end
# Represents a SIP response message
class Response < Message
attr_accessor :code, :message, :status_line, :version
# Parses +data+, constructs and returns a Response
def self.parse(data)
response = Response.new
# do some basic sanity checking on this response to ensure that it is SIP
response.status_line = data.split(/\r\n/)[0]
unless response.status_line && response.status_line =~ SIP_STATUS_REGEX
fail(ArgumentError, "Invalid SIP status line: #{response.status_line}")
end
response.version = Regexp.last_match(1)
response.code = Regexp.last_match(2)
response.message = Regexp.last_match(3)
response.headers = extract_headers(data)
response
end
end
end
end
end
Version data entries
14 entries across 14 versions & 3 rubygems