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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# These imports are for python3 compatability inside python2 |
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from __future__ import absolute_import |
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from __future__ import division |
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from __future__ import print_function |
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import copy |
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import re |
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import apex.routing |
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__author__ = 'Jeffrey Phillips Freeman (WI2ARD)' |
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__maintainer__ = 'Jeffrey Phillips Freeman (WI2ARD)' |
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__email__ = '[email protected]' |
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__license__ = 'Apache License, Version 2.0' |
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__copyright__ = 'Copyright 2016, Syncleus, Inc. and contributors' |
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__credits__ = [] |
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__version__ = '0.0.4' |
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plugin = None |
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def start(config, port_map, aprsis): |
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global plugin |
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plugin = ApexParadigmPlugin(config, port_map, aprsis) |
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plugin.run() |
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def handle_packet(frame, recv_port, recv_port_name): |
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plugin.handle_packet(frame, recv_port, recv_port_name) |
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def stop(): |
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plugin.stop() |
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class ApexParadigmPlugin(object): |
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BAND_PATH_REGEX = re.compile(r'(\d{1,4})M(\d{0,3})') |
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def __init__(self, config, port_map, aprsis): |
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self.port_map = port_map |
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self.aprsis = aprsis |
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def __passive_digipeat(self, frame, recv_port, recv_port_name): |
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# can't digipeat packets if we are in the expended path |
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if apex.routing.has_seen(self.port_map, frame): |
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return |
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for hop_index in range(0, len(frame['path'])): |
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hop = frame['path'][hop_index] |
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if hop[-1] is not '*': |
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split_hop = hop.split('-') |
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node = split_hop[0].upper() |
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if len(split_hop) >= 2 and split_hop[1]: |
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ssid = int(split_hop[1]) |
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else: |
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ssid = 0 |
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band_path = None |
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band_path_net = None |
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band_match = self.BAND_PATH_REGEX.match(node) |
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if band_match is not None: |
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band_path = band_match.group(1) |
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band_path_net = band_match.group(2) |
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for port_name in self.port_map.keys(): |
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port = self.port_map[port_name] |
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split_port_identifier = port['identifier'].split('-') |
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port_callsign = split_port_identifier[0].upper() |
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if len(split_port_identifier) >= 2 and split_port_identifier[1]: |
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port_ssid = int(split_port_identifier[1]) |
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else: |
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port_ssid = 0 |
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if band_path: |
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if band_path_net: |
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if node == port['net']: |
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frame['path'] = frame['path'][:hop_index] + [recv_port['identifier'] + '*'] +\ |
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View Code Duplication |
[hop + '*'] + frame['path'][hop_index+1:] |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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else: |
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if port['net'].startswith(node): |
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frame['path'] = frame['path'][:hop_index] + [recv_port['identifier'] + '*'] +\ |
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View Code Duplication |
[hop + '*'] + frame['path'][hop_index+1:] |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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if node == port_callsign and ssid == port_ssid: |
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if ssid is 0: |
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frame['path'][hop_index] = port_callsign + '*' |
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else: |
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frame['path'][hop_index] = port['identifier'] + '*' |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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elif node == 'GATE' and port['net'].startswith('2M'): |
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frame['path'] = frame['path'][:hop_index] + [recv_port['identifier'] + '*'] + [node + '*'] +\ |
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View Code Duplication |
frame['path'][hop_index+1:] |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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if node.startswith('WIDE') and ssid > 1: |
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frame['path'] = frame['path'][:hop_index] + [recv_port['identifier'] + '*'] +\ |
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[node + '-' + str(ssid-1)] + frame['path'][hop_index+1:] |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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elif node.startswith('WIDE') and ssid is 1: |
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frame['path'] = frame['path'][:hop_index] + [recv_port['identifier'] + '*'] + [node + '*'] + frame['path'][hop_index+1:] |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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elif node.startswith('WIDE') and ssid is 0: |
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frame['path'][hop_index] = node + '*' |
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# no return |
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else: |
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# If we didnt digipeat it then we didn't modify the frame, send it to aprsis as-is |
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self.aprsis.write(frame) |
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return |
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def __preemptive_digipeat(self, frame, recv_port, recv_port_name): |
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# can't digipeat packets if we are in the expended path |
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if apex.routing.has_seen(self.port_map, frame): |
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return |
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selected_hop = {} |
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node = None |
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ssid = 0 |
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for hop_index in reversed(range(0, len(frame['path']))): |
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hop = frame['path'][hop_index] |
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# If this is the last node before a spent node, or a spent node itself, we are done |
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if hop[-1] == '*' or frame['path'][hop_index-1][-1] == '*': |
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break |
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split_hop = hop.split('-') |
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node = split_hop[0].upper() |
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if len(split_hop) >= 2 and split_hop[1]: |
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ssid = int(split_hop[1]) |
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else: |
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continue |
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band_path = None |
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band_path_net = None |
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band_match = self.BAND_PATH_REGEX.match(node) |
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if band_match is not None: |
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band_path = band_match.group(1) |
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band_path_net = band_match.group(2) |
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if not band_path: |
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continue |
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for port_name in self.port_map.keys(): |
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port = self.port_map[port_name] |
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if band_path_net and node == port['net']: |
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# only when a ssid is present should it be treated preemptively if it is a band path |
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if not selected_hop: |
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selected_hop['index'] = hop_index |
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selected_hop['hop'] = hop |
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selected_hop['node'] = node |
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selected_hop['ssid'] = ssid |
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selected_hop['port_name'] = port_name |
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selected_hop['port'] = port |
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selected_hop['band_path'] = band_path |
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selected_hop['band_path_net'] = band_path_net |
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elif ssid > selected_hop['ssid']: |
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selected_hop['index'] = hop_index |
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selected_hop['hop'] = hop |
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selected_hop['node'] = node |
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selected_hop['ssid'] = ssid |
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selected_hop['port_name'] = port_name |
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selected_hop['port'] = port |
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selected_hop['band_path'] = band_path |
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selected_hop['band_path_net'] = band_path_net |
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elif not band_path_net and port['net'].startswith(band_path): |
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# only when a ssid is present should it be treated preemptively if it is a band path |
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if not selected_hop: |
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selected_hop['index'] = hop_index |
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selected_hop['hop'] = hop |
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selected_hop['node'] = node |
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selected_hop['ssid'] = ssid |
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selected_hop['port_name'] = port_name |
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selected_hop['port'] = port |
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selected_hop['band_path'] = band_path |
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View Code Duplication |
selected_hop['band_path_net'] = band_path_net |
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elif ssid > selected_hop['ssid']: |
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selected_hop['index'] = hop_index |
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selected_hop['hop'] = hop |
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selected_hop['node'] = node |
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selected_hop['ssid'] = ssid |
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selected_hop['port_name'] = port_name |
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selected_hop['port'] = port |
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selected_hop['band_path'] = band_path |
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selected_hop['band_path_net'] = band_path_net |
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for hop_index in reversed(range(0, len(frame['path']))): |
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hop = frame['path'][hop_index] |
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# If this is the last node before a spent node, or a spent node itself, we are done |
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if hop[-1] == '*' or frame['path'][hop_index-1][-1] == '*': |
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break |
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elif selected_hop and selected_hop['index'] <= hop_index: |
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break |
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View Code Duplication |
for port_name in self.port_map.keys(): |
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port = self.port_map[port_name] |
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# since the callsign specifically was specified in the path after the band-path the callsign takes |
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# precedence |
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if port['identifier'] == hop: |
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selected_hop['index'] = hop_index |
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selected_hop['hop'] = hop |
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selected_hop['node'] = node |
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selected_hop['ssid'] = ssid |
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selected_hop['port_name'] = port_name |
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selected_hop['port'] = port |
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selected_hop['band_path'] = None |
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selected_hop['band_path_net'] = None |
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if not selected_hop: |
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return |
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# now lets digipeat this packet |
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new_path = [] |
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for hop_index in range(0, len(frame['path'])): |
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hop = frame['path'][hop_index] |
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if hop[-1] != '*': |
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if hop_index == selected_hop['index']: |
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if selected_hop['band_path'] is None: |
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new_path += [hop + '*'] |
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else: |
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new_path += [selected_hop['port']['identifier'] + '*'] + [hop + '*'] |
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elif hop_index > selected_hop['index']: |
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new_path += [hop] |
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else: |
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new_path += [hop] |
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frame['path'] = new_path |
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port['tnc'].write(frame, port['tnc_port']) |
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self.aprsis.write(frame) |
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return |
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def stop(self): |
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return |
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def run(self): |
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return |
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def handle_packet(self, frame, recv_port, recv_port_name): |
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self.__preemptive_digipeat(copy.deepcopy(frame), recv_port, recv_port_name) |
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self.__passive_digipeat(copy.deepcopy(frame), recv_port, recv_port_name) |
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