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():
|
|||
data = data.replace(bytes([HDLC.FLAG]), bytes([HDLC.ESC, HDLC.FLAG^HDLC.ESC_MASK]))
|
||||
return data
|
||||
|
||||
class KISS():
|
||||
FEND = 0xC0
|
||||
FESC = 0xDB
|
||||
TFEND = 0xDC
|
||||
TFESC = 0xDD
|
||||
CMD_DATA = 0x00
|
||||
CMD_UNKNOWN = 0xFE
|
||||
|
||||
@staticmethod
|
||||
def escape(data):
|
||||
data = data.replace(bytes([0xdb]), bytes([0xdb, 0xdd]))
|
||||
data = data.replace(bytes([0xc0]), bytes([0xdb, 0xdc]))
|
||||
return data
|
||||
|
||||
class ThreadingTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
|
||||
pass
|
||||
|
||||
|
|
@ -32,7 +46,7 @@ class TCPClientInterface(Interface):
|
|||
TCP_PROBE_INTERVAL = 3
|
||||
TCP_PROBES = 5
|
||||
|
||||
def __init__(self, owner, name, target_ip=None, target_port=None, connected_socket=None, max_reconnect_tries=None):
|
||||
def __init__(self, owner, name, target_ip=None, target_port=None, connected_socket=None, max_reconnect_tries=None, kiss_framing=False):
|
||||
self.rxb = 0
|
||||
self.txb = 0
|
||||
|
||||
|
|
@ -48,6 +62,7 @@ class TCPClientInterface(Interface):
|
|||
self.writing = False
|
||||
self.online = False
|
||||
self.detached = False
|
||||
self.kiss_framing = kiss_framing
|
||||
|
||||
if max_reconnect_tries == None:
|
||||
self.max_reconnect_tries = TCPClientInterface.RECONNECT_MAX_TRIES
|
||||
|
|
@ -79,7 +94,8 @@ class TCPClientInterface(Interface):
|
|||
thread = threading.Thread(target=self.read_loop)
|
||||
thread.setDaemon(True)
|
||||
thread.start()
|
||||
self.wants_tunnel = True
|
||||
if not self.kiss_framing:
|
||||
self.wants_tunnel = True
|
||||
|
||||
|
||||
def set_timeouts_linux(self):
|
||||
|
|
@ -172,7 +188,8 @@ class TCPClientInterface(Interface):
|
|||
thread = threading.Thread(target=self.read_loop)
|
||||
thread.setDaemon(True)
|
||||
thread.start()
|
||||
RNS.Transport.synthesize_tunnel(self)
|
||||
if not self.kiss_framing:
|
||||
RNS.Transport.synthesize_tunnel(self)
|
||||
|
||||
else:
|
||||
RNS.log("Attempt to reconnect on a non-initiator TCP interface. This should not happen.", RNS.LOG_ERROR)
|
||||
|
|
@ -192,7 +209,12 @@ class TCPClientInterface(Interface):
|
|||
|
||||
try:
|
||||
self.writing = True
|
||||
data = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
|
||||
|
||||
if self.kiss_framing:
|
||||
data = bytes([KISS.FEND])+bytes([KISS.CMD_DATA])+KISS.escape(data)+bytes([KISS.FEND])
|
||||
else:
|
||||
data = bytes([HDLC.FLAG])+HDLC.escape(data)+bytes([HDLC.FLAG])
|
||||
|
||||
self.socket.sendall(data)
|
||||
self.writing = False
|
||||
self.txb += len(data)
|
||||
|
|
@ -210,6 +232,7 @@ class TCPClientInterface(Interface):
|
|||
in_frame = False
|
||||
escape = False
|
||||
data_buffer = b""
|
||||
command = KISS.CMD_UNKNOWN
|
||||
|
||||
while True:
|
||||
data_in = self.socket.recv(4096)
|
||||
|
|
@ -218,23 +241,53 @@ class TCPClientInterface(Interface):
|
|||
while pointer < len(data_in):
|
||||
byte = data_in[pointer]
|
||||
pointer += 1
|
||||
if (in_frame and byte == HDLC.FLAG):
|
||||
in_frame = False
|
||||
self.processIncoming(data_buffer)
|
||||
elif (byte == HDLC.FLAG):
|
||||
in_frame = True
|
||||
data_buffer = b""
|
||||
elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU):
|
||||
if (byte == HDLC.ESC):
|
||||
escape = True
|
||||
else:
|
||||
if (escape):
|
||||
if (byte == HDLC.FLAG ^ HDLC.ESC_MASK):
|
||||
byte = HDLC.FLAG
|
||||
if (byte == HDLC.ESC ^ HDLC.ESC_MASK):
|
||||
byte = HDLC.ESC
|
||||
escape = False
|
||||
data_buffer = data_buffer+bytes([byte])
|
||||
|
||||
if self.kiss_framing:
|
||||
# Read loop for KISS framing
|
||||
if (in_frame and byte == KISS.FEND and command == KISS.CMD_DATA):
|
||||
in_frame = False
|
||||
self.processIncoming(data_buffer)
|
||||
elif (byte == KISS.FEND):
|
||||
in_frame = True
|
||||
command = KISS.CMD_UNKNOWN
|
||||
data_buffer = b""
|
||||
elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU):
|
||||
if (len(data_buffer) == 0 and command == KISS.CMD_UNKNOWN):
|
||||
# We only support one HDLC port for now, so
|
||||
# strip off the port nibble
|
||||
byte = byte & 0x0F
|
||||
command = byte
|
||||
elif (command == KISS.CMD_DATA):
|
||||
if (byte == KISS.FESC):
|
||||
escape = True
|
||||
else:
|
||||
if (escape):
|
||||
if (byte == KISS.TFEND):
|
||||
byte = KISS.FEND
|
||||
if (byte == KISS.TFESC):
|
||||
byte = KISS.FESC
|
||||
escape = False
|
||||
data_buffer = data_buffer+bytes([byte])
|
||||
|
||||
else:
|
||||
# Read loop for HDLC framing
|
||||
if (in_frame and byte == HDLC.FLAG):
|
||||
in_frame = False
|
||||
self.processIncoming(data_buffer)
|
||||
elif (byte == HDLC.FLAG):
|
||||
in_frame = True
|
||||
data_buffer = b""
|
||||
elif (in_frame and len(data_buffer) < RNS.Reticulum.MTU):
|
||||
if (byte == HDLC.ESC):
|
||||
escape = True
|
||||
else:
|
||||
if (escape):
|
||||
if (byte == HDLC.FLAG ^ HDLC.ESC_MASK):
|
||||
byte = HDLC.FLAG
|
||||
if (byte == HDLC.ESC ^ HDLC.ESC_MASK):
|
||||
byte = HDLC.ESC
|
||||
escape = False
|
||||
data_buffer = data_buffer+bytes([byte])
|
||||
else:
|
||||
self.online = False
|
||||
if self.initiator and not self.detached:
|
||||
|
|
|
|||
|
|
@ -333,11 +333,16 @@ class Reticulum:
|
|||
|
||||
|
||||
if c["type"] == "TCPClientInterface":
|
||||
kiss_framing = False
|
||||
if "kiss_framing" in c and c.as_bool("kiss_framing") == True:
|
||||
kiss_framing = True
|
||||
|
||||
interface = TCPInterface.TCPClientInterface(
|
||||
RNS.Transport,
|
||||
name,
|
||||
c["target_host"],
|
||||
int(c["target_port"])
|
||||
int(c["target_port"]),
|
||||
kiss_framing = kiss_framing
|
||||
)
|
||||
|
||||
if "outgoing" in c and c.as_bool("outgoing") == True:
|
||||
|
|
|
|||
Loading…
Reference in New Issue