278 lines
14 KiB
Python
Executable File
278 lines
14 KiB
Python
Executable File
#!/usr/bin/env python
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#
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###############################################################################
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# Copyright (C) 2016-2018 Cortney T. Buffington, N0MJS <n0mjs@me.com>
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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, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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###############################################################################
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'''
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This module generates the configuration data structure for hblink.py and
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assoicated programs that use it. It has been seaparated into a different
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module so as to keep hblink.py easeier to navigate. This file only needs
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updated if the items in the main configuraiton file (usually hblink.cfg)
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change.
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'''
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import configparser
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import sys
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import const
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from socket import gethostbyname
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# Does anybody read this stuff? There's a PEP somewhere that says I should do this.
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__author__ = 'Cortney T. Buffington, N0MJS'
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__copyright__ = 'Copyright (c) 2016-2018 Cortney T. Buffington, N0MJS and the K0USY Group'
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__credits__ = 'Colin Durbridge, G4EML, Steve Zingman, N4IRS; Mike Zingman, N4IRR; Jonathan Naylor, G4KLX; Hans Barthen, DL5DI; Torsten Shultze, DG1HT'
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__license__ = 'GNU GPLv3'
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__maintainer__ = 'Cort Buffington, N0MJS'
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__email__ = 'n0mjs@me.com'
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# Processing of ALS goes here. It's separated from the acl_build function because this
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# code is hblink config-file format specific, and acl_build is abstracted
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def process_acls(_config):
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# Global registration ACL
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_config['GLOBAL']['REG_ACL'] = acl_build(_config['GLOBAL']['REG_ACL'], const.PEER_MAX)
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# Global subscriber and TGID ACLs
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for acl in ['SUB_ACL', 'TG1_ACL', 'TG2_ACL']:
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_config['GLOBAL'][acl] = acl_build(_config['GLOBAL'][acl], const.ID_MAX)
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# System level ACLs
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for system in _config['SYSTEMS']:
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# Registration ACLs (which make no sense for peer systems)
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if _config['SYSTEMS'][system]['MODE'] == 'MASTER':
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_config['SYSTEMS'][system]['REG_ACL'] = acl_build(_config['SYSTEMS'][system]['REG_ACL'], const.PEER_MAX)
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# Subscriber and TGID ACLs (valid for all system types)
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for acl in ['SUB_ACL', 'TG1_ACL', 'TG2_ACL']:
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_config['SYSTEMS'][system][acl] = acl_build(_config['SYSTEMS'][system][acl], const.ID_MAX)
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# Create an access control list that is programatically useable from human readable:
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# ORIGINAL: 'DENY:1-5,3120101,3120124'
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# PROCESSED: (False, set([(1, 5), (3120124, 3120124), (3120101, 3120101)]))
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def acl_build(_acl, _max):
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if not _acl:
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return(True, set((const.ID_MIN, _max)))
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acl = [] #set()
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sections = _acl.split(':')
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if sections[0] == 'PERMIT':
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action = True
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else:
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action = False
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for entry in sections[1].split(','):
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if entry == 'ALL':
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acl.append((const.ID_MIN, _max))
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break
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elif '-' in entry:
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start,end = entry.split('-')
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start,end = int(start), int(end)
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if (const.ID_MIN <= start <= _max) or (const.ID_MIN <= end <= _max):
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acl.append((start, end))
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else:
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sys.exit('ACL CREATION ERROR, VALUE OUT OF RANGE (} - {})IN RANGE-BASED ENTRY: {}'.format(const.ID_MIN, _max, entry))
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else:
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id = int(entry)
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if (const.ID_MIN <= id <= _max):
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acl.append((id, id))
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else:
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sys.exit('ACL CREATION ERROR, VALUE OUT OF RANGE ({} - {}) IN SINGLE ID ENTRY: {}'.format(const.ID_MIN, _max, entry))
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return (action, acl)
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def build_config(_config_file):
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config = configparser.ConfigParser()
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if not config.read(_config_file):
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sys.exit('Configuration file \''+_config_file+'\' is not a valid configuration file! Exiting...')
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CONFIG = {}
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CONFIG['GLOBAL'] = {}
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CONFIG['REPORTS'] = {}
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CONFIG['LOGGER'] = {}
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CONFIG['ALIASES'] = {}
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CONFIG['SYSTEMS'] = {}
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try:
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for section in config.sections():
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if section == 'GLOBAL':
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CONFIG['GLOBAL'].update({
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'PATH': config.get(section, 'PATH'),
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'PING_TIME': config.getint(section, 'PING_TIME'),
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'MAX_MISSED': config.getint(section, 'MAX_MISSED'),
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'USE_ACL': config.get(section, 'USE_ACL'),
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'REG_ACL': config.get(section, 'REG_ACL'),
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'SUB_ACL': config.get(section, 'SUB_ACL'),
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'TG1_ACL': config.get(section, 'TGID_TS1_ACL'),
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'TG2_ACL': config.get(section, 'TGID_TS2_ACL')
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})
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elif section == 'REPORTS':
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CONFIG['REPORTS'].update({
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'REPORT': config.getboolean(section, 'REPORT'),
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'REPORT_INTERVAL': config.getint(section, 'REPORT_INTERVAL'),
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'REPORT_PORT': config.getint(section, 'REPORT_PORT'),
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'REPORT_CLIENTS': config.get(section, 'REPORT_CLIENTS').split(',')
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})
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elif section == 'LOGGER':
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CONFIG['LOGGER'].update({
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'LOG_FILE': config.get(section, 'LOG_FILE'),
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'LOG_HANDLERS': config.get(section, 'LOG_HANDLERS'),
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'LOG_LEVEL': config.get(section, 'LOG_LEVEL'),
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'LOG_NAME': config.get(section, 'LOG_NAME')
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})
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if not CONFIG['LOGGER']['LOG_FILE']:
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CONFIG['LOGGER']['LOG_FILE'] = '/dev/null'
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elif section == 'ALIASES':
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CONFIG['ALIASES'].update({
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'TRY_DOWNLOAD': config.getboolean(section, 'TRY_DOWNLOAD'),
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'PATH': config.get(section, 'PATH'),
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'PEER_FILE': config.get(section, 'PEER_FILE'),
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'SUBSCRIBER_FILE': config.get(section, 'SUBSCRIBER_FILE'),
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'TGID_FILE': config.get(section, 'TGID_FILE'),
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'PEER_URL': config.get(section, 'PEER_URL'),
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'SUBSCRIBER_URL': config.get(section, 'SUBSCRIBER_URL'),
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'STALE_TIME': config.getint(section, 'STALE_DAYS') * 86400,
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})
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elif config.getboolean(section, 'ENABLED'):
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if config.get(section, 'MODE') == 'PEER':
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CONFIG['SYSTEMS'].update({section: {
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'MODE': config.get(section, 'MODE'),
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'ENABLED': config.getboolean(section, 'ENABLED'),
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'LOOSE': config.getboolean(section, 'LOOSE'),
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'SOCK_ADDR': (gethostbyname(config.get(section, 'IP')), config.getint(section, 'PORT')),
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'IP': gethostbyname(config.get(section, 'IP')),
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'PORT': config.getint(section, 'PORT'),
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'MASTER_SOCKADDR': (gethostbyname(config.get(section, 'MASTER_IP')), config.getint(section, 'MASTER_PORT')),
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'MASTER_IP': gethostbyname(config.get(section, 'MASTER_IP')),
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'MASTER_PORT': config.getint(section, 'MASTER_PORT'),
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'PASSPHRASE': bytes(config.get(section, 'PASSPHRASE'), 'utf-8'),
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'CALLSIGN': bytes(config.get(section, 'CALLSIGN').ljust(8)[:8], 'utf-8'),
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'RADIO_ID': config.getint(section, 'RADIO_ID').to_bytes(4, 'big'),
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'RX_FREQ': bytes(config.get(section, 'RX_FREQ').ljust(9)[:9], 'utf-8'),
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'TX_FREQ': bytes(config.get(section, 'TX_FREQ').ljust(9)[:9], 'utf-8'),
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'TX_POWER': bytes(config.get(section, 'TX_POWER').rjust(2,'0'), 'utf-8'),
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'COLORCODE': bytes(config.get(section, 'COLORCODE').rjust(2,'0'), 'utf-8'),
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'LATITUDE': bytes(config.get(section, 'LATITUDE').ljust(8)[:8], 'utf-8'),
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'LONGITUDE': bytes(config.get(section, 'LONGITUDE').ljust(9)[:9], 'utf-8'),
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'HEIGHT': bytes(config.get(section, 'HEIGHT').rjust(3,'0'), 'utf-8'),
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'LOCATION': bytes(config.get(section, 'LOCATION').ljust(20)[:20], 'utf-8'),
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'DESCRIPTION': bytes(config.get(section, 'DESCRIPTION').ljust(19)[:19], 'utf-8'),
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'SLOTS': bytes(config.get(section, 'SLOTS'), 'utf-8'),
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'URL': bytes(config.get(section, 'URL').ljust(124)[:124], 'utf-8'),
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'SOFTWARE_ID': bytes(config.get(section, 'SOFTWARE_ID').ljust(40)[:40], 'utf-8'),
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'PACKAGE_ID': bytes(config.get(section, 'PACKAGE_ID').ljust(40)[:40], 'utf-8'),
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'GROUP_HANGTIME': config.getint(section, 'GROUP_HANGTIME'),
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'OPTIONS': bytes(config.get(section, 'OPTIONS'), 'utf-8'),
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'USE_ACL': config.getboolean(section, 'USE_ACL'),
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'SUB_ACL': config.get(section, 'SUB_ACL'),
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'TG1_ACL': config.get(section, 'TGID_TS1_ACL'),
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'TG2_ACL': config.get(section, 'TGID_TS2_ACL')
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}})
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CONFIG['SYSTEMS'][section].update({'STATS': {
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'CONNECTION': 'NO', # NO, RTPL_SENT, AUTHENTICATED, CONFIG-SENT, YES
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'CONNECTED': None,
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'PINGS_SENT': 0,
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'PINGS_ACKD': 0,
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'NUM_OUTSTANDING': 0,
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'PING_OUTSTANDING': False,
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'LAST_PING_TX_TIME': 0,
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'LAST_PING_ACK_TIME': 0,
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}})
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elif config.get(section, 'MODE') == 'MASTER':
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CONFIG['SYSTEMS'].update({section: {
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'MODE': config.get(section, 'MODE'),
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'ENABLED': config.getboolean(section, 'ENABLED'),
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'REPEAT': config.getboolean(section, 'REPEAT'),
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'MAX_PEERS': config.getint(section, 'MAX_PEERS'),
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'IP': gethostbyname(config.get(section, 'IP')),
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'PORT': config.getint(section, 'PORT'),
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'PASSPHRASE': bytes(config.get(section, 'PASSPHRASE'), 'utf-8'),
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'GROUP_HANGTIME': config.getint(section, 'GROUP_HANGTIME'),
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'USE_ACL': config.getboolean(section, 'USE_ACL'),
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'REG_ACL': config.get(section, 'REG_ACL'),
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'SUB_ACL': config.get(section, 'SUB_ACL'),
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'TG1_ACL': config.get(section, 'TGID_TS1_ACL'),
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'TG2_ACL': config.get(section, 'TGID_TS2_ACL')
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}})
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CONFIG['SYSTEMS'][section].update({'PEERS': {}})
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elif config.get(section, 'MODE') == 'OPENBRIDGE':
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CONFIG['SYSTEMS'].update({section: {
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'MODE': config.get(section, 'MODE'),
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'ENABLED': config.getboolean(section, 'ENABLED'),
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'NETWORK_ID': config.getint(section, 'NETWORK_ID').to_bytes(4, 'big'),
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'IP': gethostbyname(config.get(section, 'IP')),
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'PORT': config.getint(section, 'PORT'),
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'PASSPHRASE': bytes(config.get(section, 'PASSPHRASE').ljust(20,'\x00')[:20], 'utf-8'),
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'TARGET_SOCK': (gethostbyname(config.get(section, 'TARGET_IP')), config.getint(section, 'TARGET_PORT')),
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'TARGET_IP': gethostbyname(config.get(section, 'TARGET_IP')),
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'TARGET_PORT': config.getint(section, 'TARGET_PORT'),
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'USE_ACL': config.getboolean(section, 'USE_ACL'),
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'SUB_ACL': config.get(section, 'SUB_ACL'),
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'TG1_ACL': config.get(section, 'TGID_ACL'),
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'TG2_ACL': 'PERMIT:ALL'
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}})
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except configparser.Error as err:
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sys.exit('Error processing configuration file -- {}'.format(err))
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process_acls(CONFIG)
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return CONFIG
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# Used to run this file direclty and print the config,
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# which might be useful for debugging
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if __name__ == '__main__':
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import sys
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import os
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import argparse
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from pprint import pprint
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from dmr_utils3.utils import int_id
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# Change the current directory to the location of the application
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os.chdir(os.path.dirname(os.path.realpath(sys.argv[0])))
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# CLI argument parser - handles picking up the config file from the command line, and sending a "help" message
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parser = argparse.ArgumentParser()
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parser.add_argument('-c', '--config', action='store', dest='CONFIG_FILE', help='/full/path/to/config.file (usually hblink.cfg)')
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cli_args = parser.parse_args()
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# Ensure we have a path for the config file, if one wasn't specified, then use the execution directory
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if not cli_args.CONFIG_FILE:
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cli_args.CONFIG_FILE = os.path.dirname(os.path.abspath(__file__))+'/hblink.cfg'
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CONFIG = build_config(cli_args.CONFIG_FILE)
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pprint(CONFIG)
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def acl_check(_id, _acl):
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id = int_id(_id)
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for entry in _acl[1]:
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if entry[0] <= id <= entry[1]:
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return _acl[0]
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return not _acl[0]
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print(acl_check(b'\x00\x01\x37', CONFIG['GLOBAL']['TG1_ACL']))
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