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#!/usr/bin/python3
import sys
import re
from vyos.utils.file import read_file
services_file = '/etc/services'
def get_services():
names = []
service_data = read_file(services_file, "")
for line in service_data.split("\n"):
if not line or line[0] == '#':
continue
names.append(line.split(None, 1)[0])
return names
def error(port_range):
print(f'Error: {port_range} is not a valid port or port range')
sys.exit(1)
if __name__ == '__main__':
if len(sys.argv)>1:
port_range = sys.argv[1]
if re.match('^[0-9]{1,5}-[0-9]{1,5}$', port_range):
port_1, port_2 = port_range.split('-')
if int(port_1) not in range(1, 65536) or int(port_2) not in range(1, 65536):
error(port_range)
if int(port_1) > int(port_2):
error(port_range)
elif port_range.isnumeric() and int(port_range) not in range(1, 65536):
error(port_range)
elif not port_range.isnumeric() and port_range not in get_services():
print(f'Error: {port_range} is not a valid service name')
sys.exit(1)
else:
sys.exit(2)
sys.exit(0)
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