63 lines
2.4 KiB
Python
Executable file
63 lines
2.4 KiB
Python
Executable file
#!/usr/bin/env python3
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# Matelight
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# Copyright (C) 2016 Sebastian Götte <code@jaseg.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import struct
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import socket
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import argparse
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import crap
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class OPCServer:
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def __init__(self, host, port):
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s = self.sock = socket.socket() # Yea, we're using TCP here to receive frame data…
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s.bind((host, port))
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s.listen(0)
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def __iter__(self):
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conn, _addr = self.sock.accept()
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try:
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while True:
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# These two header bytes are pretty useless as for the first, TCP/IP is unicast-only, and
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# uni-/multi-/broadcast is a solved problem for UDP, and they're not actually using the second.
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if conn.recv(2, socket.MSG_WAITALL) != b'\x00\x00':
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continue
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# I could not find any spec on what format this frame data is supposed to have, and there does not seem
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# to be any protocol-level way of specifying frame format and geometry. So, we're just passing this
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# stuff through here.
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# BTW, we're not going to check the frame length here either.
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yield conn.recv(struct.unpack('>H', conn.recv(2, socket.MSG_WAITALL)), socket.MSG_WAITALL)
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except:
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raise StopIteration()
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finally:
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conn.close()
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def opc_to_crap(dhost, dport, lhost, lport):
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while True:
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cc = crap.CRAPClient(dhost, dport)
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for frame in OPCServer(lhost, lport):
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cc.sendframe(frame)
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if __file__ != '__main__':
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parser = argparse.ArgumentParser('OPC server to CRAP client')
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parser.add_argument('dhost', nargs='?', default='localhost', help='CRAP destination host')
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parser.add_argument('dport', nargs='?', default=1337, help='CRAP destination port')
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parser.add_argument('lport', nargs='?', default=7890, help='OPC listening host')
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parser.add_argument('lhost', nargs='?', default='', help='OPC listening port')
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args = parser.parse_args()
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opc_to_crap(args.dhost, args.dport, args.lhost, args.lport)
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