kopia lustrzana https://github.com/markqvist/reticulum
636 wiersze
26 KiB
Python
636 wiersze
26 KiB
Python
# MIT License
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#
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# Copyright (c) 2016-2024 Mark Qvist / unsigned.io
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from RNS.Interfaces.Interface import Interface
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import socketserver
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import threading
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import platform
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import socket
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import time
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import sys
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import os
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import RNS
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class TCPInterface():
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HW_MTU = 262144
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class HDLC():
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FLAG = 0x7E
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ESC = 0x7D
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ESC_MASK = 0x20
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@staticmethod
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def escape(data):
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data = data.replace(bytes([HDLC.ESC]), bytes([HDLC.ESC, HDLC.ESC^HDLC.ESC_MASK]))
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data = data.replace(bytes([HDLC.FLAG]), bytes([HDLC.ESC, HDLC.FLAG^HDLC.ESC_MASK]))
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return data
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class KISS():
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FEND = 0xC0
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FESC = 0xDB
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TFEND = 0xDC
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TFESC = 0xDD
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CMD_DATA = 0x00
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CMD_UNKNOWN = 0xFE
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@staticmethod
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def escape(data):
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data = data.replace(bytes([0xdb]), bytes([0xdb, 0xdd]))
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data = data.replace(bytes([0xc0]), bytes([0xdb, 0xdc]))
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return data
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class ThreadingTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
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pass
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class ThreadingTCP6Server(socketserver.ThreadingMixIn, socketserver.TCPServer):
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address_family = socket.AF_INET6
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class TCPClientInterface(Interface):
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BITRATE_GUESS = 10*1000*1000
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DEFAULT_IFAC_SIZE = 16
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AUTOCONFIGURE_MTU = True
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RECONNECT_WAIT = 5
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RECONNECT_MAX_TRIES = None
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# TCP socket options
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TCP_USER_TIMEOUT = 24
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TCP_PROBE_AFTER = 5
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TCP_PROBE_INTERVAL = 2
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TCP_PROBES = 12
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INITIAL_CONNECT_TIMEOUT = 5
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SYNCHRONOUS_START = True
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I2P_USER_TIMEOUT = 45
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I2P_PROBE_AFTER = 10
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I2P_PROBE_INTERVAL = 9
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I2P_PROBES = 5
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def __init__(self, owner, configuration, connected_socket=None):
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super().__init__()
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c = Interface.get_config_obj(configuration)
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name = c["name"]
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target_ip = c["target_host"] if "target_host" in c and c["target_host"] != None else None
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target_port = int(c["target_port"]) if "target_port" in c and c["target_host"] != None else None
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kiss_framing = False
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if "kiss_framing" in c and c.as_bool("kiss_framing") == True:
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kiss_framing = True
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i2p_tunneled = c.as_bool("i2p_tunneled") if "i2p_tunneled" in c else False
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connect_timeout = c.as_int("connect_timeout") if "connect_timeout" in c else None
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max_reconnect_tries = c.as_int("max_reconnect_tries") if "max_reconnect_tries" in c else None
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self.HW_MTU = TCPInterface.HW_MTU
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self.IN = True
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self.OUT = False
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self.socket = None
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self.parent_interface = None
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self.name = name
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self.initiator = False
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self.reconnecting = False
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self.never_connected = True
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self.owner = owner
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self.writing = False
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self.online = False
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self.detached = False
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self.kiss_framing = kiss_framing
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self.i2p_tunneled = i2p_tunneled
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self.mode = RNS.Interfaces.Interface.Interface.MODE_FULL
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self.bitrate = TCPClientInterface.BITRATE_GUESS
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if max_reconnect_tries == None:
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self.max_reconnect_tries = TCPClientInterface.RECONNECT_MAX_TRIES
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else:
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self.max_reconnect_tries = max_reconnect_tries
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if connected_socket != None:
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self.receives = True
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self.target_ip = None
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self.target_port = None
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self.socket = connected_socket
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if platform.system() == "Linux":
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self.set_timeouts_linux()
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elif platform.system() == "Darwin":
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self.set_timeouts_osx()
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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elif target_ip != None and target_port != None:
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self.receives = True
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self.target_ip = target_ip
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self.target_port = target_port
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self.initiator = True
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if connect_timeout != None:
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self.connect_timeout = connect_timeout
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else:
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self.connect_timeout = TCPClientInterface.INITIAL_CONNECT_TIMEOUT
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if TCPClientInterface.SYNCHRONOUS_START:
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self.initial_connect()
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else:
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thread = threading.Thread(target=self.initial_connect)
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thread.daemon = True
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thread.start()
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def initial_connect(self):
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if not self.connect(initial=True):
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thread = threading.Thread(target=self.reconnect)
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thread.daemon = True
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thread.start()
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else:
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thread = threading.Thread(target=self.read_loop)
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thread.daemon = True
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thread.start()
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if not self.kiss_framing:
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self.wants_tunnel = True
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def set_timeouts_linux(self):
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if not self.i2p_tunneled:
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_USER_TIMEOUT, int(TCPClientInterface.TCP_USER_TIMEOUT * 1000))
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, int(TCPClientInterface.TCP_PROBE_AFTER))
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, int(TCPClientInterface.TCP_PROBE_INTERVAL))
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, int(TCPClientInterface.TCP_PROBES))
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else:
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_USER_TIMEOUT, int(TCPClientInterface.I2P_USER_TIMEOUT * 1000))
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, int(TCPClientInterface.I2P_PROBE_AFTER))
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, int(TCPClientInterface.I2P_PROBE_INTERVAL))
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, int(TCPClientInterface.I2P_PROBES))
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def set_timeouts_osx(self):
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if hasattr(socket, "TCP_KEEPALIVE"):
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TCP_KEEPIDLE = socket.TCP_KEEPALIVE
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else:
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TCP_KEEPIDLE = 0x10
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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if not self.i2p_tunneled:
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self.socket.setsockopt(socket.IPPROTO_TCP, TCP_KEEPIDLE, int(TCPClientInterface.TCP_PROBE_AFTER))
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else:
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self.socket.setsockopt(socket.IPPROTO_TCP, TCP_KEEPIDLE, int(TCPClientInterface.I2P_PROBE_AFTER))
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def detach(self):
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self.online = False
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if self.socket != None:
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if hasattr(self.socket, "close"):
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if callable(self.socket.close):
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self.detached = True
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try:
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self.socket.shutdown(socket.SHUT_RDWR)
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except Exception as e:
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RNS.log("Error while shutting down socket for "+str(self)+": "+str(e))
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try:
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self.socket.close()
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except Exception as e:
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RNS.log("Error while closing socket for "+str(self)+": "+str(e))
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self.socket = None
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def connect(self, initial=False):
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try:
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if initial:
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RNS.log("Establishing TCP connection for "+str(self)+"...", RNS.LOG_DEBUG)
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address_info = socket.getaddrinfo(self.target_ip, self.target_port, proto=socket.IPPROTO_TCP)[0]
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address_family = address_info[0]
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target_address = address_info[4]
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self.socket = socket.socket(address_family, socket.SOCK_STREAM)
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self.socket.settimeout(TCPClientInterface.INITIAL_CONNECT_TIMEOUT)
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self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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self.socket.connect(target_address)
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self.socket.settimeout(None)
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self.online = True
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if initial:
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RNS.log("TCP connection for "+str(self)+" established", RNS.LOG_DEBUG)
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except Exception as e:
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if initial:
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RNS.log("Initial connection for "+str(self)+" could not be established: "+str(e), RNS.LOG_ERROR)
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RNS.log("Leaving unconnected and retrying connection in "+str(TCPClientInterface.RECONNECT_WAIT)+" seconds.", RNS.LOG_ERROR)
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return False
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else:
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raise e
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if platform.system() == "Linux":
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self.set_timeouts_linux()
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elif platform.system() == "Darwin":
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self.set_timeouts_osx()
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self.online = True
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self.writing = False
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self.never_connected = False
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return True
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def reconnect(self):
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if self.initiator:
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if not self.reconnecting:
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self.reconnecting = True
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attempts = 0
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while not self.online:
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time.sleep(TCPClientInterface.RECONNECT_WAIT)
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attempts += 1
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if self.max_reconnect_tries != None and attempts > self.max_reconnect_tries:
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RNS.log("Max reconnection attempts reached for "+str(self), RNS.LOG_ERROR)
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self.teardown()
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break
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try:
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self.connect()
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except Exception as e:
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RNS.log("Connection attempt for "+str(self)+" failed: "+str(e), RNS.LOG_DEBUG)
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if not self.never_connected:
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RNS.log("Reconnected socket for "+str(self)+".", RNS.LOG_INFO)
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self.reconnecting = False
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thread = threading.Thread(target=self.read_loop)
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thread.daemon = True
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thread.start()
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if not self.kiss_framing:
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RNS.Transport.synthesize_tunnel(self)
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else:
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RNS.log("Attempt to reconnect on a non-initiator TCP interface. This should not happen.", RNS.LOG_ERROR)
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raise IOError("Attempt to reconnect on a non-initiator TCP interface")
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def process_incoming(self, data):
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if self.online and not self.detached:
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self.rxb += len(data)
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if hasattr(self, "parent_interface") and self.parent_interface != None:
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self.parent_interface.rxb += len(data)
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self.owner.inbound(data, self)
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def process_outgoing(self, data):
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if self.online and not self.detached:
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# while self.writing:
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# time.sleep(0.01)
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try:
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self.writing = True
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if self.kiss_framing:
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data = bytes([KISS.FEND])+bytes([KISS.CMD_DATA])+KISS.escape(data)+bytes([KISS.FEND])
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else:
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data = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
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self.socket.sendall(data)
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self.writing = False
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self.txb += len(data)
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if hasattr(self, "parent_interface") and self.parent_interface != None:
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self.parent_interface.txb += len(data)
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except Exception as e:
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RNS.log("Exception occurred while transmitting via "+str(self)+", tearing down interface", RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
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self.teardown()
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def read_loop(self):
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try:
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in_frame = False
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escape = False
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frame_buffer = b""
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data_in = b""
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data_buffer = b""
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while True:
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data_in = self.socket.recv(4096)
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if len(data_in) > 0:
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if self.kiss_framing:
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# Read loop for KISS framing
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pointer = 0
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while pointer < len(data_in):
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byte = data_in[pointer]
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pointer += 1
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if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA):
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in_frame = False
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self.process_incoming(data_buffer)
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elif (byte == KISS.FEND):
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in_frame = True
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command = KISS.CMD_UNKNOWN
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data_buffer = b""
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elif (in_frame and len(data_buffer) < self.HW_MTU):
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if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN):
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# We only support one HDLC port for now, so
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# strip off the port nibble
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byte = byte & 0x0F
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command = byte
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elif (command == KISS.CMD_DATA):
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if (byte == KISS.FESC):
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escape = True
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else:
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if (escape):
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if (byte == KISS.TFEND):
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byte = KISS.FEND
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if (byte == KISS.TFESC):
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byte = KISS.FESC
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escape = False
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data_buffer = data_buffer+bytes([byte])
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else:
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# Read loop for standard HDLC framing
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frame_buffer += data_in
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flags_remaining = True
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while flags_remaining:
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frame_start = frame_buffer.find(HDLC.FLAG)
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if frame_start != -1:
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frame_end = frame_buffer.find(HDLC.FLAG, frame_start+1)
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if frame_end != -1:
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frame = frame_buffer[frame_start+1:frame_end]
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frame = frame.replace(bytes([HDLC.ESC, HDLC.FLAG ^ HDLC.ESC_MASK]), bytes([HDLC.FLAG]))
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frame = frame.replace(bytes([HDLC.ESC, HDLC.ESC ^ HDLC.ESC_MASK]), bytes([HDLC.ESC]))
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if len(frame) > RNS.Reticulum.HEADER_MINSIZE:
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self.process_incoming(frame)
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frame_buffer = frame_buffer[frame_end:]
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else:
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flags_remaining = False
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else:
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flags_remaining = False
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else:
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self.online = False
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if self.initiator and not self.detached:
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RNS.log("The socket for "+str(self)+" was closed, attempting to reconnect...", RNS.LOG_WARNING)
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self.reconnect()
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else:
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RNS.log("The socket for remote client "+str(self)+" was closed.", RNS.LOG_VERBOSE)
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self.teardown()
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break
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except Exception as e:
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self.online = False
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RNS.log("An interface error occurred for "+str(self)+", the contained exception was: "+str(e), RNS.LOG_WARNING)
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if self.initiator:
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RNS.log("Attempting to reconnect...", RNS.LOG_WARNING)
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self.reconnect()
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else:
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self.teardown()
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def teardown(self):
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if self.initiator and not self.detached:
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RNS.log("The interface "+str(self)+" experienced an unrecoverable error and is being torn down. Restart Reticulum to attempt to open this interface again.", RNS.LOG_ERROR)
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if RNS.Reticulum.panic_on_interface_error:
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RNS.panic()
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else:
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RNS.log("The interface "+str(self)+" is being torn down.", RNS.LOG_VERBOSE)
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self.online = False
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self.OUT = False
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self.IN = False
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if hasattr(self, "parent_interface") and self.parent_interface != None:
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while self in self.parent_interface.spawned_interfaces:
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self.parent_interface.spawned_interfaces.remove(self)
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if self in RNS.Transport.interfaces:
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if not self.initiator:
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RNS.Transport.interfaces.remove(self)
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def __str__(self):
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if ":" in self.target_ip:
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ip_str = f"[{self.target_ip}]"
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else:
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ip_str = f"{self.target_ip}"
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return "TCPInterface["+str(self.name)+"/"+ip_str+":"+str(self.target_port)+"]"
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class TCPServerInterface(Interface):
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BITRATE_GUESS = 10_000_000
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DEFAULT_IFAC_SIZE = 16
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AUTOCONFIGURE_MTU = True
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@staticmethod
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def get_address_for_if(name, bind_port, prefer_ipv6=False):
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import RNS.vendor.ifaddr.niwrapper as netinfo
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ifaddr = netinfo.ifaddresses(name)
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if len(ifaddr) < 1:
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raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to")
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if (prefer_ipv6 or not netinfo.AF_INET in ifaddr) and netinfo.AF_INET6 in ifaddr:
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bind_ip = ifaddr[netinfo.AF_INET6][0]["addr"]
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if bind_ip.lower().startswith("fe80::"):
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# We'll need to add the interface as scope for link-local addresses
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return TCPServerInterface.get_address_for_host(f"{bind_ip}%{name}", bind_port)
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else:
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return TCPServerInterface.get_address_for_host(bind_ip, bind_port)
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elif netinfo.AF_INET in ifaddr:
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bind_ip = ifaddr[netinfo.AF_INET][0]["addr"]
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return (bind_ip, bind_port)
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else:
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raise SystemError(f"No addresses available on specified kernel interface \"{name}\" for TCPServerInterface to bind to")
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@staticmethod
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def get_address_for_host(name, bind_port):
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address_info = socket.getaddrinfo(name, bind_port, proto=socket.IPPROTO_TCP)[0]
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if address_info[0] == socket.AF_INET6:
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return (name, bind_port, address_info[4][2], address_info[4][3])
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elif address_info[0] == socket.AF_INET:
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return (name, bind_port)
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else:
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raise SystemError(f"No suitable kernel interface available for address \"{name}\" for TCPServerInterface to bind to")
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@property
|
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def clients(self):
|
|
return len(self.spawned_interfaces)
|
|
|
|
def __init__(self, owner, configuration):
|
|
super().__init__()
|
|
|
|
c = Interface.get_config_obj(configuration)
|
|
name = c["name"]
|
|
device = c["device"] if "device" in c else None
|
|
port = int(c["port"]) if "port" in c else None
|
|
bindip = c["listen_ip"] if "listen_ip" in c else None
|
|
bindport = int(c["listen_port"]) if "listen_port" in c else None
|
|
i2p_tunneled = c.as_bool("i2p_tunneled") if "i2p_tunneled" in c else False
|
|
prefer_ipv6 = c.as_bool("prefer_ipv6") if "prefer_ipv6" in c else False
|
|
|
|
if port != None:
|
|
bindport = port
|
|
|
|
self.HW_MTU = TCPInterface.HW_MTU
|
|
|
|
self.online = False
|
|
self.spawned_interfaces = []
|
|
|
|
self.IN = True
|
|
self.OUT = False
|
|
self.name = name
|
|
self.detached = False
|
|
|
|
self.i2p_tunneled = i2p_tunneled
|
|
self.mode = RNS.Interfaces.Interface.Interface.MODE_FULL
|
|
|
|
if bindport == None:
|
|
raise SystemError(f"No TCP port configured for interface \"{name}\"")
|
|
else:
|
|
self.bind_port = bindport
|
|
|
|
bind_address = None
|
|
if device != None:
|
|
bind_address = TCPServerInterface.get_address_for_if(device, self.bind_port, prefer_ipv6)
|
|
else:
|
|
if bindip == None:
|
|
raise SystemError(f"No TCP bind IP configured for interface \"{name}\"")
|
|
bind_address = TCPServerInterface.get_address_for_host(bindip, self.bind_port)
|
|
|
|
if bind_address != None:
|
|
self.receives = True
|
|
self.bind_ip = bind_address[0]
|
|
|
|
def handlerFactory(callback):
|
|
def createHandler(*args, **keys):
|
|
return TCPInterfaceHandler(callback, *args, **keys)
|
|
return createHandler
|
|
|
|
self.owner = owner
|
|
|
|
if len(bind_address) == 4:
|
|
try:
|
|
ThreadingTCP6Server.allow_reuse_address = True
|
|
self.server = ThreadingTCP6Server(bind_address, handlerFactory(self.incoming_connection))
|
|
except Exception as e:
|
|
RNS.log(f"Error while binding IPv6 socket for interface, the contained exception was: {e}", RNS.LOG_ERROR)
|
|
raise SystemError("Could not bind IPv6 socket for interface. Please check the specified \"listen_ip\" configuration option")
|
|
else:
|
|
ThreadingTCPServer.allow_reuse_address = True
|
|
self.server = ThreadingTCPServer(bind_address, handlerFactory(self.incoming_connection))
|
|
|
|
self.bitrate = TCPServerInterface.BITRATE_GUESS
|
|
|
|
thread = threading.Thread(target=self.server.serve_forever)
|
|
thread.daemon = True
|
|
thread.start()
|
|
|
|
self.online = True
|
|
|
|
else:
|
|
raise SystemError("Insufficient parameters to create TCP listener")
|
|
|
|
def incoming_connection(self, handler):
|
|
RNS.log("Accepting incoming TCP connection", RNS.LOG_VERBOSE)
|
|
spawned_configuration = {"name": "Client on "+self.name, "target_host": None, "target_port": None, "i2p_tunneled": self.i2p_tunneled}
|
|
spawned_interface = TCPClientInterface(self.owner, spawned_configuration, connected_socket=handler.request)
|
|
spawned_interface.OUT = self.OUT
|
|
spawned_interface.IN = self.IN
|
|
spawned_interface.target_ip = handler.client_address[0]
|
|
spawned_interface.target_port = str(handler.client_address[1])
|
|
spawned_interface.parent_interface = self
|
|
spawned_interface.bitrate = self.bitrate
|
|
spawned_interface.optimise_mtu()
|
|
|
|
spawned_interface.ifac_size = self.ifac_size
|
|
spawned_interface.ifac_netname = self.ifac_netname
|
|
spawned_interface.ifac_netkey = self.ifac_netkey
|
|
if spawned_interface.ifac_netname != None or spawned_interface.ifac_netkey != None:
|
|
ifac_origin = b""
|
|
if spawned_interface.ifac_netname != None:
|
|
ifac_origin += RNS.Identity.full_hash(spawned_interface.ifac_netname.encode("utf-8"))
|
|
if spawned_interface.ifac_netkey != None:
|
|
ifac_origin += RNS.Identity.full_hash(spawned_interface.ifac_netkey.encode("utf-8"))
|
|
|
|
ifac_origin_hash = RNS.Identity.full_hash(ifac_origin)
|
|
spawned_interface.ifac_key = RNS.Cryptography.hkdf(
|
|
length=64,
|
|
derive_from=ifac_origin_hash,
|
|
salt=RNS.Reticulum.IFAC_SALT,
|
|
context=None
|
|
)
|
|
spawned_interface.ifac_identity = RNS.Identity.from_bytes(spawned_interface.ifac_key)
|
|
spawned_interface.ifac_signature = spawned_interface.ifac_identity.sign(RNS.Identity.full_hash(spawned_interface.ifac_key))
|
|
|
|
spawned_interface.announce_rate_target = self.announce_rate_target
|
|
spawned_interface.announce_rate_grace = self.announce_rate_grace
|
|
spawned_interface.announce_rate_penalty = self.announce_rate_penalty
|
|
spawned_interface.mode = self.mode
|
|
spawned_interface.HW_MTU = self.HW_MTU
|
|
spawned_interface.online = True
|
|
RNS.log("Spawned new TCPClient Interface: "+str(spawned_interface), RNS.LOG_VERBOSE)
|
|
RNS.Transport.interfaces.append(spawned_interface)
|
|
while spawned_interface in self.spawned_interfaces:
|
|
self.spawned_interfaces.remove(spawned_interface)
|
|
self.spawned_interfaces.append(spawned_interface)
|
|
spawned_interface.read_loop()
|
|
|
|
def received_announce(self, from_spawned=False):
|
|
if from_spawned: self.ia_freq_deque.append(time.time())
|
|
|
|
def sent_announce(self, from_spawned=False):
|
|
if from_spawned: self.oa_freq_deque.append(time.time())
|
|
|
|
def process_outgoing(self, data):
|
|
pass
|
|
|
|
def detach(self):
|
|
if self.server != None:
|
|
if hasattr(self.server, "shutdown"):
|
|
if callable(self.server.shutdown):
|
|
try:
|
|
RNS.log("Detaching "+str(self), RNS.LOG_DEBUG)
|
|
self.server.shutdown()
|
|
self.detached = True
|
|
self.server = None
|
|
|
|
except Exception as e:
|
|
RNS.log("Error while shutting down server for "+str(self)+": "+str(e))
|
|
|
|
|
|
def __str__(self):
|
|
if ":" in self.bind_ip:
|
|
ip_str = f"[{self.bind_ip}]"
|
|
else:
|
|
ip_str = f"{self.bind_ip}"
|
|
|
|
return "TCPServerInterface["+self.name+"/"+ip_str+":"+str(self.bind_port)+"]"
|
|
|
|
|
|
class TCPInterfaceHandler(socketserver.BaseRequestHandler):
|
|
def __init__(self, callback, *args, **keys):
|
|
self.callback = callback
|
|
socketserver.BaseRequestHandler.__init__(self, *args, **keys)
|
|
|
|
def handle(self):
|
|
self.callback(handler=self)
|