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require "proxifier/proxies/socks"
module Proxifier
class SOCKS4Proxy < SOCKSProxy
VERSION = 0x04
protected
def greet(socket)
# noop
end
def authenticate(socket, method)
# noop
end
def connect(socket, host, port)
begin
ip = IPAddr.new(host)
rescue ArgumentError
ip = IPAddr.new(Socket.getaddrinfo(host, nil, :INET, :STREAM).first)
end
socket << [VERSION, 0x01, port].pack("CCn") << ip.hton
socket << user if user
socket << 0x00
version, status, port = socket.read(4).unpack("CCn")
check_version(version, 0x00)
ip = IPAddr.ntop(socket.read(4))
case status
when 0x5A # request granted
when 0x5B # request rejected or failed
raise "request rejected or failed"
when 0x5C # request rejected becasue SOCKS server cannot connect to identd on the client
raise "request rejected becasue SOCKS server cannot connect to identd on the client"
when 0x5D # request rejected because the client program and identd report different user-ids
raise "request rejected because the client program and identd report different user-ids"
else
raise "unknown SOCKS error"
end
end
end
end
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