88 lines
2.5 KiB
Python
88 lines
2.5 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# TRX Toolkit
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# Burst forwarding between transceivers
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#
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# (C) 2017-2018 by Vadim Yanitskiy <axilirator@gmail.com>
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#
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# All Rights Reserved
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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 2 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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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import logging as log
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class BurstForwarder:
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""" Performs burst forwarding between transceivers.
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BurstForwarder distributes bursts between the list of given
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FakeTRX (Transceiver) instances depending on the following
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parameters of each transceiver:
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- execution state (running or idle),
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- actual RX / TX frequencies,
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- list of active timeslots.
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Each to be distributed L12TRX message is being transformed
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into a TRX2L1 message, and then forwarded to transceivers
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with partially initialized header. All uninitialized header
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fields (such as rssi and toa256) shall be set by each
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transceiver individually before sending towards the L1.
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"""
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def __init__(self, trx_list = None):
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# List of Transceiver instances
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if trx_list is not None:
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self.trx_list = trx_list
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else:
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self.trx_list = []
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def add_trx(self, trx):
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if trx in self.trx_list:
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log.error("TRX is already in the list")
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return
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self.trx_list.append(trx)
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def del_trx(self, trx):
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if trx not in self.trx_list:
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log.error("TRX is not in the list")
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return
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self.trx_list.remove(trx)
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def forward_msg(self, src_trx, rx_msg):
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# Transform from L12TRX to TRX2L1
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tx_msg = rx_msg.gen_trx2l1()
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if tx_msg is None:
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log.error("Forwarding failed, could not transform "
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"message (%s) => dropping..." % rx_msg.desc_hdr())
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# Iterate over all known transceivers
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for trx in self.trx_list:
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if trx == src_trx:
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continue
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# Check transceiver state
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if not trx.running:
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continue
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if trx.rx_freq != src_trx.tx_freq:
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continue
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if tx_msg.tn not in trx.ts_list:
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continue
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trx.send_data_msg(src_trx, rx_msg, tx_msg)
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