105 lines
1.9 KiB
Ruby
105 lines
1.9 KiB
Ruby
require 'rex'
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module Net
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module SSH
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class CommandStream
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attr_accessor :channel, :thread, :error, :ssh
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attr_accessor :lsock, :rsock, :monitor
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module PeerInfo
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include ::Rex::IO::Stream
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attr_accessor :peerinfo
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attr_accessor :localinfo
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end
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def initialize(ssh, cmd, cleanup = false)
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self.lsock, self.rsock = Rex::Socket.tcp_socket_pair()
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self.lsock.extend(Rex::IO::Stream)
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self.lsock.extend(PeerInfo)
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self.rsock.extend(Rex::IO::Stream)
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self.ssh = ssh
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self.thread = Thread.new(ssh,cmd,cleanup) do |rssh,rcmd,rcleanup|
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begin
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info = ssh.transport.socket.getpeername
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self.lsock.peerinfo = "#{info[1]}:#{info[2]}"
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info = ssh.transport.socket.getsockname
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self.lsock.localinfo = "#{info[1]}:#{info[2]}"
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rssh.open_channel do |rch|
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rch.exec(rcmd) do |c, success|
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raise "could not execute command: #{rcmd.inspect}" unless success
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c[:data] = ''
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c.on_eof do
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self.rsock.close
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self.thread.kill
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end
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c.on_close do
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self.rsock.close
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self.thread.kill
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end
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c.on_data do |ch,data|
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self.rsock.write(data)
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end
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c.on_extended_data do |ch, ctype, data|
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self.rsock.write(data)
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end
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self.channel = c
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end
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end
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self.monitor = Thread.new do
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while(true)
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next if not self.rsock.has_read_data?(1.0)
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buff = self.rsock.sysread(16384)
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break if not buff
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verify_channel
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self.channel.send_data(buff) if buff
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end
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end
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while true
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rssh.process(0.5) { true }
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end
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rescue ::Exception => e
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self.error = e
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ensure
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self.monitor.kill if self.monitor
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end
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# Shut down the SSH session if requested
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if(rcleanup)
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rssh.close
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end
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end
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end
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#
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# Prevent a race condition
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#
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def verify_channel
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while ! self.channel
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raise EOFError if ! self.thread.alive?
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select(nil, nil, nil, 0.10)
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end
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end
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end
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end
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end
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