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require 'socket'
require 'resolv'
class << IPSocket
alias original_resolv_getaddress getaddress
def getaddress(host)
begin
return Resolv.getaddress(host).to_s
rescue Resolv::ResolvError
raise SocketError, "Hostname not known: #{host}"
end
end
end
class TCPSocket
alias original_resolv_initialize initialize
def initialize(host, serv, *rest)
rest[0] = IPSocket.getaddress(rest[0]) unless rest.empty?
original_resolv_initialize(IPSocket.getaddress(host), serv, *rest)
end
end
class UDPSocket
alias original_resolv_bind bind
def bind(host, port)
original_resolv_bind(IPSocket.getaddress(host), port)
end
alias original_resolv_connect connect
def connect(host, port)
original_resolv_connect(IPSocket.getaddress(host), port)
end
alias original_resolv_send send
def send(mesg, flags, *rest)
if rest.length == 2
host, port = rest
begin
addrs = Resolv.getaddresses(host)
rescue Resolv::ResolvError
raise SocketError, "Hostname not known: #{host}"
end
err = nil
addrs[0...-1].each {|addr|
begin
return original_resolv_send(mesg, flags, addr, port)
rescue SystemCallError
end
}
original_resolv_send(mesg, flags, addrs[-1], port)
else
original_resolv_send(mesg, flags, *rest)
end
end
end
class SOCKSSocket
alias original_resolv_initialize initialize
def initialize(host, serv)
original_resolv_initialize(IPSocket.getaddress(host), port)
end
end if defined? SOCKSSocket
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