From 586b24e0af1ae57c47c772229fc94ab50dfc1e4f Mon Sep 17 00:00:00 2001
From: sarthurdev <965089+sarthurdev@users.noreply.github.com>
Date: Wed, 2 Nov 2022 15:32:11 +0100
Subject: policy: T2199: T4605: Migrate policy route interface to `policy
 route|route6 <name> interface <ifname>`

* Include refactor to policy route to allow for deletion of mangle table instead of complex cleanup
* T4605: Rename mangle table to vyos_mangle
---
 src/conf_mode/policy-route-interface.py | 132 --------------------------------
 1 file changed, 132 deletions(-)
 delete mode 100755 src/conf_mode/policy-route-interface.py

(limited to 'src/conf_mode/policy-route-interface.py')

diff --git a/src/conf_mode/policy-route-interface.py b/src/conf_mode/policy-route-interface.py
deleted file mode 100755
index 58c5fd93d..000000000
--- a/src/conf_mode/policy-route-interface.py
+++ /dev/null
@@ -1,132 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2021 VyOS maintainers and contributors
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 or later as
-# published by the Free Software Foundation.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import os
-import re
-
-from sys import argv
-from sys import exit
-
-from vyos.config import Config
-from vyos.ifconfig import Section
-from vyos.template import render
-from vyos.util import cmd
-from vyos.util import run
-from vyos import ConfigError
-from vyos import airbag
-airbag.enable()
-
-def get_config(config=None):
-    if config:
-        conf = config
-    else:
-        conf = Config()
-
-    ifname = argv[1]
-    ifpath = Section.get_config_path(ifname)
-    if_policy_path = f'interfaces {ifpath} policy'
-
-    if_policy = conf.get_config_dict(if_policy_path, key_mangling=('-', '_'), get_first_key=True,
-                                    no_tag_node_value_mangle=True)
-
-    if_policy['ifname'] = ifname
-    if_policy['policy'] = conf.get_config_dict(['policy'], key_mangling=('-', '_'), get_first_key=True,
-                                    no_tag_node_value_mangle=True)
-
-    return if_policy
-
-def verify_chain(table, chain):
-    # Verify policy route applied
-    code = run(f'nft list chain {table} {chain}')
-    return code == 0
-
-def verify(if_policy):
-    # bail out early - looks like removal from running config
-    if not if_policy:
-        return None
-
-    for route in ['route', 'route6']:
-        if route in if_policy:
-            if route not in if_policy['policy']:
-                raise ConfigError('Policy route not configured')
-
-            route_name = if_policy[route]
-
-            if route_name not in if_policy['policy'][route]:
-                raise ConfigError(f'Invalid policy route name "{name}"')
-
-            nft_prefix = 'VYOS_PBR6_' if route == 'route6' else 'VYOS_PBR_'
-            nft_table = 'ip6 mangle' if route == 'route6' else 'ip mangle'
-
-            if not verify_chain(nft_table, nft_prefix + route_name):
-                raise ConfigError('Policy route did not apply')
-
-    return None
-
-def generate(if_policy):
-    return None
-
-def cleanup_rule(table, chain, ifname, new_name=None):
-    results = cmd(f'nft -a list chain {table} {chain}').split("\n")
-    retval = None
-    for line in results:
-        if f'ifname "{ifname}"' in line:
-            if new_name and f'jump {new_name}' in line:
-                # new_name is used to clear rules for any previously referenced chains
-                # returns true when rule exists and doesn't need to be created
-                retval = True
-                continue
-
-            handle_search = re.search('handle (\d+)', line)
-            if handle_search:
-                cmd(f'nft delete rule {table} {chain} handle {handle_search[1]}')
-    return retval
-
-def apply(if_policy):
-    ifname = if_policy['ifname']
-
-    route_chain = 'VYOS_PBR_PREROUTING'
-    ipv6_route_chain = 'VYOS_PBR6_PREROUTING'
-
-    if 'route' in if_policy:
-        name = 'VYOS_PBR_' + if_policy['route']
-        rule_exists = cleanup_rule('ip mangle', route_chain, ifname, name)
-
-        if not rule_exists:
-            cmd(f'nft insert rule ip mangle {route_chain} iifname {ifname} counter jump {name}')
-    else:
-        cleanup_rule('ip mangle', route_chain, ifname)
-
-    if 'route6' in if_policy:
-        name = 'VYOS_PBR6_' + if_policy['route6']
-        rule_exists = cleanup_rule('ip6 mangle', ipv6_route_chain, ifname, name)
-
-        if not rule_exists:
-            cmd(f'nft insert rule ip6 mangle {ipv6_route_chain} iifname {ifname} counter jump {name}')
-    else:
-        cleanup_rule('ip6 mangle', ipv6_route_chain, ifname)
-
-    return None
-
-if __name__ == '__main__':
-    try:
-        c = get_config()
-        verify(c)
-        generate(c)
-        apply(c)
-    except ConfigError as e:
-        print(e)
-        exit(1)
-- 
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