133 lines
2.6 KiB
Ruby
133 lines
2.6 KiB
Ruby
# -*- coding: binary -*-
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require 'rex/socket'
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###
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#
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# This class provides methods for interacting with a IP socket.
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#
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###
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module Rex::Socket::Ip
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include Rex::Socket
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##
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#
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# Factory
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#
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##
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#
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# Creates the client using the supplied hash.
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#
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def self.create(hash = {})
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hash['Proto'] = 'ip'
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self.create_param(Rex::Socket::Parameters.from_hash(hash))
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end
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#
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# Wrapper around the base socket class' creation method that automatically
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# sets the parameter's protocol to IP.
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#
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def self.create_param(param)
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param.proto = 'ip'
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Rex::Socket.create_param(param)
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end
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##
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#
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# IP connected state methods
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#
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##
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#
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# Write the supplied datagram to the connected IP socket.
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#
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def write(gram)
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raise RuntimeError, "IP sockets must use sendto(), not write()"
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end
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alias put write
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#
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# Read a datagram from the IP socket.
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#
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def read(length = 65535)
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raise RuntimeError, "IP sockets must use recvfrom(), not read()"
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end
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##
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#
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# IP non-connected state methods
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#
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##
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#
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# Sends a datagram to the supplied host:port with optional flags.
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#
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def sendto(gram, peerhost, flags = 0)
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dest = ::Socket.pack_sockaddr_in(0, peerhost)
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# Some BSDs require byteswap for len and offset
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if(
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Rex::Compat.is_freebsd or
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Rex::Compat.is_netbsd or
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Rex::Compat.is_bsdi or
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Rex::Compat.is_macosx
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)
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gram=gram.dup
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# Note that these are *intentionally* host order for BSD support
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gram[2,2]=gram[2,2].unpack("n").pack("s")
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gram[6,2]=gram[6,2].unpack("n").pack("s")
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end
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begin
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send(gram, flags, dest)
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rescue ::Errno::EHOSTUNREACH,::Errno::ENETDOWN,::Errno::ENETUNREACH,::Errno::ENETRESET,::Errno::EHOSTDOWN,::Errno::EACCES,::Errno::EINVAL,::Errno::EADDRNOTAVAIL
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return nil
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end
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end
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#
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# Receives a datagram and returns the data and host of the requestor
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# as [ data, host ].
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#
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def recvfrom(length = 65535, timeout=def_read_timeout)
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begin
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if ((rv = ::IO.select([ fd ], nil, nil, timeout)) and
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(rv[0]) and (rv[0][0] == fd)
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)
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data, saddr = super(length)
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af, host = Rex::Socket.from_sockaddr(saddr)
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return [ data, host ]
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else
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return [ '', nil ]
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end
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rescue Exception
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return [ '', nil ]
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end
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end
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#
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# Calls recvfrom and only returns the data
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#
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def get(timeout=nil)
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data, saddr = recvfrom(65535, timeout)
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return data
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end
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#
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# The default number of seconds to wait for a read operation to timeout.
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#
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def def_read_timeout
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10
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end
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def type?
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return 'ip'
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end
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end
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