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https://github.com/markqvist/Reticulum.git
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Added KISS framing option to TCP client interface
This commit is contained in:
Mark Qvist
parent
8fe7c19c59
commit
2e4fcc659c
@ -19,6 +19,20 @@ class HDLC():
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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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@ -32,7 +46,7 @@ class TCPClientInterface(Interface):
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TCP_PROBE_INTERVAL = 3
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TCP_PROBES = 5
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def __init__(self, owner, name, target_ip=None, target_port=None, connected_socket=None, max_reconnect_tries=None):
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def __init__(self, owner, name, target_ip=None, target_port=None, connected_socket=None, max_reconnect_tries=None, kiss_framing=False):
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self.rxb = 0
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self.txb = 0
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@ -48,6 +62,7 @@ class TCPClientInterface(Interface):
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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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if max_reconnect_tries == None:
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self.max_reconnect_tries = TCPClientInterface.RECONNECT_MAX_TRIES
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@ -79,7 +94,8 @@ class TCPClientInterface(Interface):
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thread = threading.Thread(target=self.read_loop)
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thread.setDaemon(True)
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thread.start()
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self.wants_tunnel = True
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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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@ -172,7 +188,8 @@ class TCPClientInterface(Interface):
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thread = threading.Thread(target=self.read_loop)
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thread.setDaemon(True)
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thread.start()
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RNS.Transport.synthesize_tunnel(self)
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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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@ -192,7 +209,12 @@ class TCPClientInterface(Interface):
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try:
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self.writing = True
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data = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
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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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@ -210,6 +232,7 @@ class TCPClientInterface(Interface):
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in_frame = False
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escape = False
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data_buffer = b""
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command = KISS.CMD_UNKNOWN
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while True:
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data_in = self.socket.recv(4096)
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@ -218,23 +241,53 @@ class TCPClientInterface(Interface):
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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 == HDLC.FLAG):
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in_frame = False
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self.processIncoming(data_buffer)
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elif (byte == HDLC.FLAG):
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in_frame = True
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data_buffer = b""
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elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU):
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if (byte == HDLC.ESC):
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escape = True
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else:
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if (escape):
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if (byte == HDLC.FLAG ^ HDLC.ESC_MASK):
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byte = HDLC.FLAG
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if (byte == HDLC.ESC ^ HDLC.ESC_MASK):
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byte = HDLC.ESC
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escape = False
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data_buffer = data_buffer+bytes([byte])
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if self.kiss_framing:
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# Read loop for KISS framing
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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.processIncoming(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) < RNS.Reticulum.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 HDLC framing
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if (in_frame and byte == HDLC.FLAG):
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in_frame = False
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self.processIncoming(data_buffer)
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elif (byte == HDLC.FLAG):
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in_frame = True
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data_buffer = b""
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elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU):
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if (byte == HDLC.ESC):
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escape = True
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else:
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if (escape):
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if (byte == HDLC.FLAG ^ HDLC.ESC_MASK):
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byte = HDLC.FLAG
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if (byte == HDLC.ESC ^ HDLC.ESC_MASK):
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byte = HDLC.ESC
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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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self.online = False
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if self.initiator and not self.detached:
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@ -333,11 +333,16 @@ class Reticulum:
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if c["type"] == "TCPClientInterface":
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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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interface = TCPInterface.TCPClientInterface(
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RNS.Transport,
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name,
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c["target_host"],
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int(c["target_port"])
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int(c["target_port"]),
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kiss_framing = kiss_framing
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)
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if "outgoing" in c and c.as_bool("outgoing") == True:
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