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#!/usr/bin/python3
from sys import argv
from sys import exit
import re
from vyos.util 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
tmp = line.split()
names.append(tmp[0])
if len(tmp) > 2:
# Add port aliases to service list, too
names.extend(tmp[2:])
# remove duplicate entries (e.g. echo) from list
names = list(dict.fromkeys(names))
return names
if __name__ == '__main__':
if len(argv)>1:
ports = argv[1].split(",")
services = get_services()
for port in ports:
if port and port[0] == '!':
port = port[1:]
if re.match('^[0-9]{1,5}-[0-9]{1,5}$', port):
port_1, port_2 = port.split('-')
if int(port_1) not in range(1, 65536) or int(port_2) not in range(1, 65536):
print(f'Error: {port} is not a valid port range')
exit(1)
if int(port_1) > int(port_2):
print(f'Error: {port} is not a valid port range')
exit(1)
elif port.isnumeric():
if int(port) not in range(1, 65536):
print(f'Error: {port} is not a valid port')
exit(1)
elif port not in services:
print(f'Error: {port} is not a valid service name')
exit(1)
else:
exit(2)
exit(0)
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