Class: Rex::Post::Meterpreter::Extensions::Stdapi::Net::SocketSubsystem::TcpServerChannel
- Inherits:
-
Channel
- Object
- Channel
- Rex::Post::Meterpreter::Extensions::Stdapi::Net::SocketSubsystem::TcpServerChannel
- 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) ⇒ Channel
Open a new tcp server channel on the remote end.
-
.request_handler(client, packet) ⇒ Object
This is the request handler which is registered 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 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
Methods included from InboundPacketHandler
#request_handler, #response_handler
Constructor Details
#initialize(client, cid, type, flags) ⇒ TcpServerChannel
Simply initilize this instance.
98 99 100 101 102 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 98 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] ||= ::Queue.new end |
Class Method Details
.cls ⇒ Object
71 72 73 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 71 def self.cls CHANNEL_CLASS_STREAM end |
.open(client, params) ⇒ Channel
Open a new tcp server channel on the remote end.
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 79 def self.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 registered 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.
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 34 def self.request_handler(client, packet) return false unless 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 ) return false if cid.nil? || pid.nil? server_channel = client.find_channel(pid) return false if server_channel.nil? 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 @@server_channels[server_channel] ||= ::Queue.new @@server_channels[server_channel].enq(client_channel) true 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.
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 116 def accept(opts = {}) timeout = opts['Timeout'] if (timeout.nil? || timeout <= 0) timeout = 0 end result = nil begin ::Timeout.timeout(timeout) { result = _accept } rescue Timeout::Error end 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.
108 109 110 |
# File 'lib/rex/post/meterpreter/extensions/stdapi/net/socket_subsystem/tcp_server_channel.rb', line 108 def accept_nonblock _accept(true) end |