76 lines
1.9 KiB
Python
76 lines
1.9 KiB
Python
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from dmr_utils.utils import int_id
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# Lowest possible Subscirber and/or talkgroup IDs allowed by ETSI standard
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ID_MIN = 1
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ID_MAX = 16776415
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# Checks the supplied ID against the ID given, and the ACL list, and the action
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# Returns True if the ID should be allowed, False if it should not be
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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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def acl_build(_acl):
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if not _acl:
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return(True, set((ID_MIN, ID_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.add((ID_MIN, ID_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 (ID_MIN <= start <= ID_MAX) or (ID_MIN <= end <= ID_MAX):
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acl.add((start, end))
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else:
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pass #logger message here
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else:
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id = int(entry)
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if (ID_MIN <= id <= ID_MAX) or (ID_MIN <= id <= ID_MAX):
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acl.add((id, id))
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else:
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pass #logger message here
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return (action, acl)
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if __name__ == '__main__':
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from time import time
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from pprint import pprint
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ACL = {
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'SUB': {
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'K0USY': 'PERMIT:1-5,3120101,3120124'
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},
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'TGID': {
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'GLOBAL': 'DENY:ALL',
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'K0USY': 'PERMIT:1-5,3120,31201'
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}
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}
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for acl in ACL:
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if 'GLOBAL' not in ACL[acl]:
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ACL[acl].update({'GLOBAL':'PERMIT:ALL'})
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for acltype in ACL[acl]:
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ACL[acl][acltype] = acl_build(ACL[acl][acltype])
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pprint(ACL)
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print
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print(acl_check('\x00\x00\x01', ACL['TGID']['GLOBAL']))
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print(acl_check('\x00\x00\x01', ACL['TGID']['K0USY']))
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