Agent: Revert old TcpProxy and create a new one

monkey/infection_monkey/network/relay/tcp.py

@@ -0,0 +1,127 @@
+import select
+import socket
+from functools import partial
+from logging import getLogger
+from threading import Thread
+from typing import Callable
+
+from infection_monkey.transport.base import (
+    PROXY_TIMEOUT,
+    TransportProxyBase,
+    update_last_serve_time,
+)
+
+READ_BUFFER_SIZE = 8192
+SOCKET_READ_TIMEOUT = 10
+
+logger = getLogger(__name__)
+
+
+def _default_client_data_received(_: bytes, client=None) -> bool:
+    return True
+
+
+class SocketsPipe(Thread):
+    def __init__(
+        self,
+        source,
+        dest,
+        timeout=SOCKET_READ_TIMEOUT,
+        client_disconnected: Callable[[str], None] = None,
+        client_data_received: Callable[[bytes], bool] = _default_client_data_received,
+    ):
+        Thread.__init__(self)
+        self.source = source
+        self.dest = dest
+        self.timeout = timeout
+        self._keep_connection = True
+        super(SocketsPipe, self).__init__()
+        self.daemon = True
+        self._client_disconnected = client_disconnected
+        self._client_data_received = client_data_received
+
+    def run(self):
+        sockets = [self.source, self.dest]
+        while self._keep_connection:
+            self._keep_connection = False
+            rlist, wlist, xlist = select.select(sockets, [], sockets, self.timeout)
+            if xlist:
+                break
+            for r in rlist:
+                other = self.dest if r is self.source else self.source
+                try:
+                    data = r.recv(READ_BUFFER_SIZE)
+                except Exception:
+                    break
+                if data and self._client_data_received(data):
+                    try:
+                        other.sendall(data)
+                        update_last_serve_time()
+                    except Exception:
+                        break
+                    self._keep_connection = True
+
+        self.source.close()
+        self.dest.close()
+        if self._client_disconnected:
+            self._client_disconnected()
+
+
+class TcpProxy(TransportProxyBase):
+    def __init__(
+        self,
+        local_port,
+        dest_host=None,
+        dest_port=None,
+        local_host="",
+        client_connected: Callable[[str], None] = None,
+        client_disconnected: Callable[[str], None] = None,
+        client_data_received: Callable[[bytes, str], bool] = _default_client_data_received,
+    ):
+        super().__init__(local_port, dest_host, dest_port, local_host)
+        self._client_connected = client_connected
+        # TODO: Rethink client_disconnected
+        self._client_disconnected = client_disconnected
+        self._client_data_received = client_data_received
+
+    def run(self):
+        pipes = []
+        l_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        l_socket.bind((self.local_host, self.local_port))
+        l_socket.settimeout(PROXY_TIMEOUT)
+        l_socket.listen(5)
+
+        while not self._stopped:
+            try:
+                source, address = l_socket.accept()
+            except socket.timeout:
+                continue
+
+            dest = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            try:
+                dest.connect((self.dest_host, self.dest_port))
+            except socket.error:
+                source.close()
+                dest.close()
+                continue
+
+            on_disconnect = (
+                partial(self._client_connected, address[0]) if self._client_connected else None
+            )
+            on_data_received = partial(self._client_data_received, client=address[0])
+            pipe = SocketsPipe(source, dest, on_disconnect, on_data_received)
+            pipes.append(pipe)
+            logger.debug(
+                "piping sockets %s:%s->%s:%s",
+                address[0],
+                address[1],
+                self.dest_host,
+                self.dest_port,
+            )
+            if self._client_connected:
+                self._client_connected(address[0])
+            pipe.start()
+
+        l_socket.close()
+        for pipe in pipes:
+            pipe.join()

monkey/infection_monkey/tcp_relay.py

@@ -4,7 +4,7 @@ from threading import Event, Lock, Thread
 from time import sleep, time
 from typing import Dict
 
-from infection_monkey.transport.tcp import TcpProxy
+from infection_monkey.network.relay.tcp import TcpProxy
 
 DEFAULT_NEW_CLIENT_TIMEOUT = 3  # Wait up to 3 seconds for potential new clients to connect
 RELAY_CONTROL_MESSAGE = b"infection-monkey-relay-control-message: -"

monkey/infection_monkey/transport/tcp.py

@@ -1,9 +1,7 @@
 import select
 import socket
-from functools import partial
 from logging import getLogger
 from threading import Thread
-from typing import Callable
 
 from infection_monkey.transport.base import (
     PROXY_TIMEOUT,
@@ -17,19 +15,8 @@ SOCKET_READ_TIMEOUT = 10
 logger = getLogger(__name__)
 
 
-def _default_client_data_received(_: bytes, client=None) -> bool:
-    return True
-
-
 class SocketsPipe(Thread):
-    def __init__(
-        self,
-        source,
-        dest,
-        timeout=SOCKET_READ_TIMEOUT,
-        client_disconnected: Callable[[str], None] = None,
-        client_data_received: Callable[[bytes], bool] = _default_client_data_received,
-    ):
+    def __init__(self, source, dest, timeout=SOCKET_READ_TIMEOUT):
         Thread.__init__(self)
         self.source = source
         self.dest = dest
@@ -37,8 +24,6 @@ class SocketsPipe(Thread):
         self._keep_connection = True
         super(SocketsPipe, self).__init__()
         self.daemon = True
-        self._client_disconnected = client_disconnected
-        self._client_data_received = client_data_received
 
     def run(self):
         sockets = [self.source, self.dest]
@@ -53,7 +38,7 @@ class SocketsPipe(Thread):
                     data = r.recv(READ_BUFFER_SIZE)
                 except Exception:
                     break
-                if data and self._client_data_received(data):
+                if data:
                     try:
                         other.sendall(data)
                         update_last_serve_time()
@@ -63,27 +48,9 @@ class SocketsPipe(Thread):
 
         self.source.close()
         self.dest.close()
-        if self._client_disconnected:
-            self._client_disconnected()
 
 
 class TcpProxy(TransportProxyBase):
-    def __init__(
-        self,
-        local_port,
-        dest_host=None,
-        dest_port=None,
-        local_host="",
-        client_connected: Callable[[str], None] = None,
-        client_disconnected: Callable[[str], None] = None,
-        client_data_received: Callable[[bytes, str], bool] = _default_client_data_received,
-    ):
-        super().__init__(local_port, dest_host, dest_port, local_host)
-        self._client_connected = client_connected
-        # TODO: Rethink client_disconnected
-        self._client_disconnected = client_disconnected
-        self._client_data_received = client_data_received
-
     def run(self):
         pipes = []
         l_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -105,11 +72,7 @@ class TcpProxy(TransportProxyBase):
                 dest.close()
                 continue
 
-            on_disconnect = (
-                partial(self._client_connected, address[0]) if self._client_connected else None
-            )
-            on_data_received = partial(self._client_data_received, client=address[0])
-            pipe = SocketsPipe(source, dest, on_disconnect, on_data_received)
+            pipe = SocketsPipe(source, dest)
             pipes.append(pipe)
             logger.debug(
                 "piping sockets %s:%s->%s:%s",
@@ -118,8 +81,6 @@ class TcpProxy(TransportProxyBase):
                 self.dest_host,
                 self.dest_port,
             )
-            if self._client_connected:
-                self._client_connected(address[0])
             pipe.start()
 
         l_socket.close()