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111 lines
3.3 KiB
Python
111 lines
3.3 KiB
Python
'''SocketTransport implements TCP socket interface for Transport.'''
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import socket
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from select import select
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from .transport import Transport
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class SocketTransportClient(Transport):
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def __init__(self, device, *args, **kwargs):
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device = device.split(':')
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if len(device) < 2:
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device = ('0.0.0.0', int(device[0]))
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else:
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device = (device[0], int(device[1]))
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self.socket = None
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super(SocketTransportClient, self).__init__(device, *args, **kwargs)
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def _open(self):
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.connect(self.device)
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self.filelike = self.socket.makefile()
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def _close(self):
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self.socket.close()
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self.socket = None
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self.filelike = None
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def ready_to_read(self):
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rlist, _, _ = select([self.socket], [], [], 0)
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return len(rlist) > 0
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def _write(self, msg, protobuf_msg):
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self.socket.sendall(msg)
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def _read(self):
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try:
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(msg_type, datalen) = self._read_headers(self.filelike)
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return (msg_type, self.filelike.read(datalen))
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except socket.error:
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print("Failed to read from device")
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return None
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class SocketTransport(Transport):
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def __init__(self, device, *args, **kwargs):
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device = device.split(':')
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if len(device) < 2:
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device = ('0.0.0.0', int(device[0]))
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else:
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device = (device[0], int(device[1]))
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self.socket = None
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self.client = None
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self.filelike = None
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super(SocketTransport, self).__init__(device, *args, **kwargs)
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def _open(self):
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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#self.socket.setblocking(0)
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self.socket.bind(self.device)
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self.socket.listen(5)
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def _disconnect_client(self):
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print("Disconnecting client")
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if self.client != None:
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self.client.close()
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self.client = None
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self.filelike = None
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def _close(self):
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self._disconnect_client()
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self.socket.close()
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self.socket = None
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def ready_to_read(self):
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if self.filelike:
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# Connected
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rlist, _, _ = select([self.client], [], [], 0)
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return len(rlist) > 0
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else:
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# Waiting for connection
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rlist, _, _ = select([self.socket], [], [], 0)
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if len(rlist) > 0:
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(self.client, ipaddr) = self.socket.accept()
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print("Connected", ipaddr[0])
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self.filelike = self.client.makefile()
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return self.ready_to_read()
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return False
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def _write(self, msg, protobuf_msg):
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if self.filelike:
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# None on disconnected client
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try:
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self.filelike.write(msg)
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self.filelike.flush()
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except socket.error:
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print("Socket error")
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self._disconnect_client()
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def _read(self):
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try:
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(msg_type, datalen) = self._read_headers(self.filelike)
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return (msg_type, self.filelike.read(datalen))
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except Exception:
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print("Failed to read from device")
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self._disconnect_client()
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return None
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