1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
#!/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 argparse
import re
import tabulate
from vyos.config import Config
from vyos.util import cmd
from vyos.util import dict_search_args
def get_policy_interfaces(conf, policy, name=None, ipv6=False):
interfaces = conf.get_config_dict(['interfaces'], key_mangling=('-', '_'),
get_first_key=True, no_tag_node_value_mangle=True)
routes = ['route', 'route6']
def parse_if(ifname, if_conf):
if 'policy' in if_conf:
for route in routes:
if route in if_conf['policy']:
route_name = if_conf['policy'][route]
name_str = f'({ifname},{route})'
if not name:
policy[route][route_name]['interface'].append(name_str)
elif not ipv6 and name == route_name:
policy['interface'].append(name_str)
for iftype in ['vif', 'vif_s', 'vif_c']:
if iftype in if_conf:
for vifname, vif_conf in if_conf[iftype].items():
parse_if(f'{ifname}.{vifname}', vif_conf)
for iftype, iftype_conf in interfaces.items():
for ifname, if_conf in iftype_conf.items():
parse_if(ifname, if_conf)
def get_config_policy(conf, name=None, ipv6=False, interfaces=True):
config_path = ['policy']
if name:
config_path += ['route6' if ipv6 else 'route', name]
policy = conf.get_config_dict(config_path, key_mangling=('-', '_'),
get_first_key=True, no_tag_node_value_mangle=True)
if policy and interfaces:
if name:
policy['interface'] = []
else:
if 'route' in policy:
for route_name, route_conf in policy['route'].items():
route_conf['interface'] = []
if 'route6' in policy:
for route_name, route_conf in policy['ipv6_route'].items():
route_conf['interface'] = []
get_policy_interfaces(conf, policy, name, ipv6)
return policy
def get_nftables_details(name, ipv6=False):
suffix = '6' if ipv6 else ''
command = f'sudo nft list chain ip{suffix} mangle VYOS_PBR{suffix}_{name}'
try:
results = cmd(command)
except:
return {}
out = {}
for line in results.split('\n'):
comment_search = re.search(rf'{name}[\- ](\d+|default-action)', line)
if not comment_search:
continue
rule = {}
rule_id = comment_search[1]
counter_search = re.search(r'counter packets (\d+) bytes (\d+)', line)
if counter_search:
rule['packets'] = counter_search[1]
rule['bytes'] = counter_search[2]
rule['conditions'] = re.sub(r'(\b(counter packets \d+ bytes \d+|drop|reject|return|log)\b|comment "[\w\-]+")', '', line).strip()
out[rule_id] = rule
return out
def output_policy_route(name, route_conf, ipv6=False, single_rule_id=None):
ip_str = 'IPv6' if ipv6 else 'IPv4'
print(f'\n---------------------------------\n{ip_str} Policy Route "{name}"\n')
if route_conf['interface']:
print('Active on: {0}\n'.format(" ".join(route_conf['interface'])))
details = get_nftables_details(name, ipv6)
rows = []
if 'rule' in route_conf:
for rule_id, rule_conf in route_conf['rule'].items():
if single_rule_id and rule_id != single_rule_id:
continue
if 'disable' in rule_conf:
continue
action = rule_conf['action'] if 'action' in rule_conf else 'set'
protocol = rule_conf['protocol'] if 'protocol' in rule_conf else 'all'
row = [rule_id, action, protocol]
if rule_id in details:
rule_details = details[rule_id]
row.append(rule_details.get('packets', 0))
row.append(rule_details.get('bytes', 0))
row.append(rule_details['conditions'])
rows.append(row)
if 'default_action' in route_conf and not single_rule_id:
row = ['default', route_conf['default_action'], 'all']
if 'default-action' in details:
rule_details = details['default-action']
row.append(rule_details.get('packets', 0))
row.append(rule_details.get('bytes', 0))
rows.append(row)
if rows:
header = ['Rule', 'Action', 'Protocol', 'Packets', 'Bytes', 'Conditions']
print(tabulate.tabulate(rows, header) + '\n')
def show_policy(ipv6=False):
print('Ruleset Information')
conf = Config()
policy = get_config_policy(conf)
if not policy:
return
if not ipv6 and 'route' in policy:
for route, route_conf in policy['route'].items():
output_policy_route(route, route_conf, ipv6=False)
if ipv6 and 'route6' in policy:
for route, route_conf in policy['route6'].items():
output_policy_route(route, route_conf, ipv6=True)
def show_policy_name(name, ipv6=False):
print('Ruleset Information')
conf = Config()
policy = get_config_policy(conf, name, ipv6)
if policy:
output_policy_route(name, policy, ipv6)
def show_policy_rule(name, rule_id, ipv6=False):
print('Rule Information')
conf = Config()
policy = get_config_policy(conf, name, ipv6)
if policy:
output_policy_route(name, policy, ipv6, rule_id)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--action', help='Action', required=False)
parser.add_argument('--name', help='Policy name', required=False, action='store', nargs='?', default='')
parser.add_argument('--rule', help='Policy Rule ID', required=False)
parser.add_argument('--ipv6', help='IPv6 toggle', action='store_true')
args = parser.parse_args()
if args.action == 'show':
if not args.rule:
show_policy_name(args.name, args.ipv6)
else:
show_policy_rule(args.name, args.rule, args.ipv6)
elif args.action == 'show_all':
show_policy(args.ipv6)
|
