Class: Rex::Post::Meterpreter::Extensions::Stdapi::Net::SocketSubsystem::TcpServerChannel
- Inherits:
-
Channel
- Object
- Channel
- Rex::Post::Meterpreter::Extensions::Stdapi::Net::SocketSubsystem::TcpServerChannel
- Extended by:
- InboundPacketHandler
- Defined in:
- lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb
Constant Summary collapse
- @@server_channels =
This is a class variable to store all pending client tcp connections which have not been passed off via a call to the respective server tcp channels accept method. The dictionary key is the tcp server channel instance and the values held are an array of pending tcp client channels connected to the tcp server channel.
{}
Instance Attribute Summary
Attributes inherited from Channel
#cid, #client, #cls, #flags, #params, #type
Class Method Summary collapse
- .cls ⇒ Object
-
.open(client, params) ⇒ Object
Open a new tcp server channel on the remote end.
-
.request_handler(client, packet) ⇒ Object
This is the request handler which is registerd to the respective meterpreter instance via Rex::Post::Meterpreter::Extensions::Stdapi::Net::Socket.
Instance Method Summary collapse
-
#accept(opts = {}) ⇒ Object
Accept a new tcp client connection form this tcp server channel.
-
#accept_nonblock ⇒ Object
Accept a new tcp client connection form this tcp server channel.
-
#initialize(client, cid, type, flags) ⇒ TcpServerChannel
constructor
Simply initilize this instance.
Methods included from InboundPacketHandler
request_handler, response_handler
Methods inherited from Channel
_close, #_close, #_read, #_write, #close, #close_read, #close_write, create, #dio_close_handler, #dio_handler, #dio_map, #dio_read_handler, #dio_write_handler, finalize, #flag?, #interactive, #read, #synchronous?, #write
Constructor Details
#initialize(client, cid, type, flags) ⇒ TcpServerChannel
Simply initilize this instance.
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 111 def initialize(client, cid, type, flags) super(client, cid, type, flags) # add this instance to the class variables dictionary of tcp server channels @@server_channels[self] = [] end |
Class Method Details
.cls ⇒ Object
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 83 def cls return CHANNEL_CLASS_STREAM end |
.open(client, params) ⇒ Object
Open a new tcp server channel on the remote end.
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 92 def TcpServerChannel.open(client, params) c = Channel.create(client, 'stdapi_net_tcp_server', self, CHANNEL_FLAG_SYNCHRONOUS, [ { 'type' => TLV_TYPE_LOCAL_HOST, 'value' => params.localhost }, { 'type' => TLV_TYPE_LOCAL_PORT, 'value' => params.localport } ] ) c.params = params c end |
.request_handler(client, packet) ⇒ Object
This is the request handler which is registerd to the respective meterpreter instance via Rex::Post::Meterpreter::Extensions::Stdapi::Net::Socket. All incoming requests from the meterpreter for a ‘tcp_channel_open’ will be processed here. We create a new TcpClientChannel for each request received and store it in the respective tcp server channels list of new pending client channels. These new tcp client channels are passed off via a call the the tcp server channels accept() method.
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 36 def request_handler( client, packet ) if( packet.method == "tcp_channel_open" ) cid = packet.get_tlv_value( TLV_TYPE_CHANNEL_ID ) pid = packet.get_tlv_value( TLV_TYPE_CHANNEL_PARENTID ) localhost = packet.get_tlv_value( TLV_TYPE_LOCAL_HOST ) localport = packet.get_tlv_value( TLV_TYPE_LOCAL_PORT ) peerhost = packet.get_tlv_value( TLV_TYPE_PEER_HOST ) peerport = packet.get_tlv_value( TLV_TYPE_PEER_PORT ) if( cid == nil or pid == nil ) return false end server_channel = client.find_channel( pid ) if( server_channel == nil ) return false end params = Rex::Socket::Parameters.from_hash( { 'Proto' => 'tcp', 'LocalHost' => localhost, 'LocalPort' => localport, 'PeerHost' => peerhost, 'PeerPort' => peerport, 'Comm' => server_channel.client } ) client_channel = TcpClientChannel.new( client, cid, TcpClientChannel, CHANNEL_FLAG_SYNCHRONOUS ) client_channel.params = params if( @@server_channels[server_channel] == nil ) @@server_channels[server_channel] = [] end @@server_channels[server_channel] << client_channel return true end return false end |
Instance Method Details
#accept(opts = {}) ⇒ Object
Accept a new tcp client connection form this tcp server channel. This method will block indefinatly if no timeout is specified.
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 134 def accept( opts={} ) timeout = opts['Timeout'] || -1 if( timeout == -1 ) result = _accept else begin ::Timeout.timeout( timeout ) { result = _accept } rescue Timeout::Error result = nil end end return result end |
#accept_nonblock ⇒ Object
Accept a new tcp client connection form this tcp server channel. This method does not block and returns nil if no new client connection is available.
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# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 121 def accept_nonblock result = nil if( @@server_channels[self].length > 0 ) channel = @@server_channels[self].shift result = channel.lsock end return result end |