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x0ip.py
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x0ip.py
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##
## imports
##
from abc import ABC, abstractmethod
import socket
##
## code
##
class AbstractIP(ABC):
def __init__(self, name, peer, useLog, timeoutConfig, delimit = None):
self.name = name
self.log = useLog
self.peer = peer
self.socket = None
self.connected = False
self.timeout = timeoutConfig[self.name]
self.buffer = b''
self.chatty = True
self.delimit = delimit
@abstractmethod
def connect(self):
pass
@abstractmethod
def close(self):
pass
@abstractmethod
def send(self,data):
pass
@abstractmethod
def read(self, emptyIt = False):
pass
class X0IPJVC(AbstractIP):
"""IP connectivity to JVC"""
def __init__(self, name, peer, useLog, timeoutConfig, delimit = None):
self.name = name
self.log = useLog
self.peer = peer
self.socket = None
self.connected = False
# self.timeout = timeoutConfig['jvcIP']
self.timeout = timeoutConfig[self.name]
self.buffer = b''
self.ignoreACK = b'\x06\x89\x01\x00\x00\n'
self.chatty = False
def connect(self):
self.log.debug(f'Inside connect with peer {self.peer}')
if self.socket != None:
self.log.debug(f'Socket is not zero so closing it')
self.close()
self.log.debug(f'Creating new socket')
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
self.socket.settimeout(self.timeout)
self.connected = False
try:
self.socket.connect(self.peer)
# improve later
temp = self.socket.recv(20)
self.log.debug(f'JVC Sync1 is {temp}')
self.socket.send(b'PJREQ')
temp = self.socket.recv(20)
self.log.debug(f'JVC Sync2 is {temp}')
self.connected = True
except Exception as ex:
self.log.debug(f'connect exception {ex}')
self.close()
self.log.debug(f'Connected state is {self.connected}')
return self.connected
def close(self):
self.log.debug(f'close socket was called')
if self.socket != None:
self.socket.close()
self.socket = None
self.connected = False
self.buffer = b''
def send(self,data):
try:
if not self.connected:
self.log.debug(f'send called but not connected')
self.connect()
except Exception as ex:
self.log.debug(f'Exception from connect during send {ex}')
return False
if not self.connected:
self.log.debug(f'Unexpected trying to send while not connected')
return False
try:
self.socket.sendall(data)
return True
except Exception as ex:
self.log.debug(f'socket send exception {ex}')
self.close()
return False
def read(self, emptyIt = False):
if emptyIt and (not self.connected):
# if we aren't connected then there's nothing to do for emptyIt
return b''
try:
if not self.connected:
self.log.debug(f'read called but not connected')
self.connect()
except Exception as ex:
self.log.debug(f'Exception from connect during recv {ex}')
return b''
if not self.connected:
self.log.debug(f'Returning nothing because not connected')
return b''
try:
# don't do a socket read if we have a message buffered
haveit = (self.buffer.find(b'\n') >= 0)
if haveit:
self.log.debug(f'Using buffered data len={len(self.buffer)}, data={self.buffer}')
rxData = b''
if not haveit:
rxData = self.socket.recv(200)
if (not haveit) and (rxData == b''):
# no message in buffer and nothing received from network
if self.chatty:
self.log.debug('Socket read returned nothing')
return b''
else:
if self.chatty and (not haveit):
self.log.debug(f'Socket read returned {len(rxData)} bytes. Buffer is {len(self.buffer)}')
self.buffer += rxData
while True:
if self.chatty:
self.log.debug(f'buffer is {self.buffer}')
first = self.buffer.find(b'\n')
if first >= 0:
# we found it
moreThanOne = self.buffer[first+1:].find(b'\n') >= 0
if self.chatty or moreThanOne:
self.log.debug(f'buffer is {len(self.buffer)} data:{self.buffer}')
r = self.buffer[0:first+1]
self.buffer = self.buffer[first+1:]
if self.chatty or moreThanOne:
self.log.debug(f'buffer reduced to len:{len(self.buffer)} data:{self.buffer}')
if emptyIt:
# ignore r and loop again
if self.chatty:
self.log.debug(f'Discarding {r}')
pass
elif r == self.ignoreACK:
# we always ignore this
if self.chatty:
self.log.debug(f'Ignoring {r}')
pass
else:
# ok to return it
if self.chatty:
self.log.debug(f'returning {r}')
return r
else:
# didn't get a full line
# nothing to return yet
return b''
except socket.timeout:
if self.chatty:
self.log.debug(f'Returning nothing because of timeout')
return b''
except Exception as ex:
self.log.debug(f'Exception from recv {ex}', exc_info=True)
self.close()
return b''
class X0IPGeneric(AbstractIP):
"""IP connectivity to JVC"""
def __init__(self, name, peer, useLog, timeoutConfig, delimit = b'\x1a\r\n'):
self.name = name
self.log = useLog
self.peer = peer
self.socket = None
self.connected = False
self.timeout = timeoutConfig[self.name]
self.chatty = True
self.buffer = b''
self.delimit = delimit
def connect(self):
self.log.debug(f'Inside connect with peer {self.peer}')
if self.socket != None:
self.log.debug(f'Socket is not zero so closing it')
self.close()
self.log.debug(f'Creating new socket')
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
self.socket.settimeout(self.timeout)
self.connected = False
try:
self.socket.connect(self.peer)
self.connected = True
except Exception as ex:
self.log.debug(f'connect exception {ex}')
self.close()
self.log.debug(f'Connected state is {self.connected}')
return self.connected
def close(self):
self.log.debug(f'close socket was called and socket is {self.socket}')
if self.socket != None:
self.socket.close()
self.socket = None
self.connected = False
self.buffer = b''
def send(self,data):
self.log.debug('send called')
try:
if not self.connected:
self.log.debug(f'send called but not connected')
self.connect()
except Exception as ex:
self.log.debug(f'Exception from connect during send {ex}')
return False
if not self.connected:
self.log.debug(f'Unexpected trying to send while not connected')
return False
try:
self.socket.sendall(data)
return True
except Exception as ex:
self.log.debug(f'socket send exception {ex}')
self.close()
self.log.debug(f'returning false')
return False
def read(self, emptyIt = False):
self.log.debug(f'read called')
try:
if not self.connected:
self.log.debug(f'read called but not connected')
self.connect()
except Exception as ex:
self.log.debug(f'Exception from connect during recv {ex}')
return b''
if not self.connected:
self.log.debug(f'Returning nothing because not connected')
return b''
try:
# don't do a socket read if we have a message buffered
haveit = (self.buffer.find(self.delimit) >= 0)
if haveit:
self.log.debug(f'Using buffered data len={len(self.buffer)}, data={self.buffer}')
rxData = b''
if not haveit:
rxData = self.socket.recv(2000)
self.log.debug(f'Called recv and got {rxData}')
if (not haveit) and (rxData == b''):
# no message in buffer and nothing received from network
if self.chatty:
self.log.debug('Socket read returned nothing')
return b''
else:
if self.chatty and (not haveit):
self.log.debug(f'Socket read returned {len(rxData)} bytes. Buffer is {len(self.buffer)}')
self.buffer += rxData
while True:
if self.chatty:
self.log.debug(f'buffer is {self.buffer}')
first = self.buffer.find(self.delimit)
if first >= 0:
# we found it
moreThanOne = self.buffer[first+len(self.delimit):].find(self.delimit) >= 0
if self.chatty or moreThanOne:
self.log.debug(f'buffer is {len(self.buffer)} data:{self.buffer}')
r = self.buffer[0:first+len(self.delimit)]
self.buffer = self.buffer[first+len(self.delimit):]
if self.chatty or moreThanOne:
self.log.debug(f'buffer reduced to len:{len(self.buffer)} data:{self.buffer}')
if emptyIt:
# ignore r and loop again
if self.chatty:
self.log.debug(f'Discarding {r}')
pass
else:
# ok to return it
if self.chatty:
self.log.debug(f'returning {r}')
return r
else:
# didn't get a full line
# nothing to return yet
return b''
except socket.timeout:
if self.chatty:
self.log.debug(f'Returning nothing because of timeout')
return b''
except Exception as ex:
self.log.debug(f'Exception from recv {ex}', exc_info=True)
self.close()
return b''
# def read(self, emptyIt = False):
# try:
# if not self.connected:
# self.log.debug(f'read called but not connected')
# self.connect()
# except Exception as ex:
# self.log.debug(f'Exception from connect during recv {ex}')
# return b''
# if not self.connected:
# self.log.debug(f'Returning nothing because not connected')
# return b''
# try:
# rxData = self.socket.recv(200)
# if (rxData == b''):
# # no message in buffer
# if self.chatty:
# self.log.debug('Socket read returned nothing')
# return b''
# else:
# if self.chatty:
# self.log.debug(f'returning {rxData}')
# return rxData
# except socket.timeout:
# if self.chatty:
# self.log.debug(f'Returning nothing because of timeout')
# return b''
# except Exception as ex:
# self.log.debug(f'Exception from recv {ex}')
# self.close()
# return b''