nifty
: nouveau nom nyfthon
et ré-écriture
This commit is contained in:
parent
75b4d58edd
commit
85454f0309
2 changed files with 74 additions and 59 deletions
59
bin/nifty
59
bin/nifty
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@ -1,59 +0,0 @@
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#!/usr/bin/env python3
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from sys import argv
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from sys import stderr
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from sys import exit
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from os import path
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import nftables
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NFT = nftables.Nftables()
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FILTER_TABLE = "inet filter"
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try:
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NAME = path.basename(argv.pop(0))
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except IndexError:
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pass
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def error(message, exit_code):
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print("%s: %s" % (NAME, message), file = stderr)
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exit(exit_code)
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def alter_set(operation, protocol, port):
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NFT.cmd("%s element %s allowed_%s { %s }" % (operation, FILTER_TABLE, protocol, port))
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def public_allow(argv):
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try:
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protocol = argv.pop(0)
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except IndexError:
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error("no protocol supplied", 1)
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try:
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port = argv.pop(0)
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except IndexError:
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error("no port supplied", 1)
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alter_set('add', protocol, port)
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def public_deny(argv):
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try:
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protocol = argv.pop(0)
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except IndexError:
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error("no protocol supplied", 1)
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try:
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port = argv.pop(0)
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except IndexError:
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error("no port supplied", 1)
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alter_set('delete', protocol, port)
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if __name__ == '__main__':
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try:
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arg = argv.pop(0)
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except IndexError:
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error("No command supplied", 1)
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try:
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command = globals()["public_%s" % (arg)]
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except KeyError:
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error('invalid command "%s"' % (arg), 2)
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command(argv)
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74
bin/nyfthon
Executable file
74
bin/nyfthon
Executable file
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@ -0,0 +1,74 @@
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#!/usr/bin/env python3
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from nftables import Nftables
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from os import path
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import sys
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NFT = Nftables()
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NAME = path.basename(__file__)
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def error(message, code):
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print("%s: %s" % (NAME, message), file = sys.stderr)
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exit(code)
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def error_no_arg(arg_name):
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error("no %s provided" % (arg_name), 1)
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def error_invalid_arg(arg_name, value):
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error('invalid %s "%s"' % (arg_name, value), 2)
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def allowed_ports(operation, protocol, port):
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if operation != "add" and operation != "delete":
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raise ValueError("not a valid nftables operation")
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if protocol != "tcp" and protocol != "udp":
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raise ValueError("not a valid protocol")
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if port < 0 or port > 65535:
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raise ValueError("not a valid port number")
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NFT.cmd("%s element inet filter allowed_%s { %d }" % (operation, protocol, port))
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def manage_ports(action, args):
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match action:
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case "allow":
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operation = "add"
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case "deny":
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operation = "delete"
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case _:
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raise ValueError("invalid action")
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try:
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protocol = args.pop(0)
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except IndexError:
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error_no_arg("protocol")
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try:
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port = args.pop(0)
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except IndexError:
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error_no_arg("port")
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try:
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port = int(port)
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except ValueError:
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error_invalid_arg("port", port)
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try:
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allowed_ports(operation, protocol, port)
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except ValueError as e:
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error(e, 3)
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if __name__ == "__main__":
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sys.argv.pop(0)
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try:
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action = sys.argv.pop(0)
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except IndexError:
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error_no_arg("action")
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match action:
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case "help":
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usage()
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case "allow" | "deny":
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manage_ports(action, sys.argv)
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case _:
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error_invalid_arg("action", action)
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