summaryrefslogtreecommitdiff
path: root/src/conf_mode/service_pppoe-server.py
blob: b43e76f6d41b2ffd2ad6232a1be3b602b019937c (plain)
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
190
191
192
193
194
#!/usr/bin/env python3
#
# Copyright (C) 2018-2020 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

from sys import exit

from vyos.config import Config
from vyos.configdict import dict_merge
from vyos.validate import is_ipv4
from vyos.template import render
from vyos.util import call
from vyos.util import get_half_cpus
from vyos.util import vyos_dict_search
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()

pppoe_conf = r'/run/accel-pppd/pppoe.conf'
pppoe_chap_secrets = r'/run/accel-pppd/pppoe.chap-secrets'

def get_config(config=None):
    if config:
        conf = config
    else:
        conf = Config()
    base = ['service', 'pppoe-server']
    if not conf.exists(base):
        return None

    pppoe = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
    # We have gathered the dict representation of the CLI, but there are default
    # options which we need to update into the dictionary retrived.
    default_values = defaults(base)

    # defaults include RADIUS server specifics per TAG node which need to be
    # added to individual RADIUS servers instead - so we can simply delete them
    if vyos_dict_search('authentication.radius.server', default_values):
        del default_values['authentication']['radius']['server']
    # defaults include static-ip address per TAG node which need to be added to
    # individual local users instead - so we can simply delete them
    if vyos_dict_search('authentication.local_users.username', default_values):
        del default_values['authentication']['local_users']['username']

    pppoe = dict_merge(default_values, pppoe)

    # set CPUs cores to process requests
    pppoe.update({'thread_count' : get_half_cpus()})
    # we need to store the path to the secrets file
    pppoe.update({'chap_secrets_file' : pppoe_chap_secrets})

    # We can only have two IPv4 and three IPv6 nameservers - also they are
    # configured in a different way in the configuration, this is why we split
    # the configuration
    if 'name_server' in pppoe:
        ns_v4 = []
        ns_v6 = []
        for ns in pppoe['name_server']:
            if is_ipv4(ns): ns_v4.append(ns)
            else: ns_v6.append(ns)

        pppoe.update({'name_server_ipv4' : ns_v4, 'name_server_ipv6' : ns_v6})
        del pppoe['name_server']

    # Add individual RADIUS server default values
    if vyos_dict_search('authentication.radius.server', pppoe):
        default_values = defaults(base + ['authentication', 'radius', 'server'])

        for server in vyos_dict_search('authentication.radius.server', pppoe):
            pppoe['authentication']['radius']['server'][server] = dict_merge(
                default_values, pppoe['authentication']['radius']['server'][server])

    # Add individual local-user default values
    if vyos_dict_search('authentication.local_users.username', pppoe):
        default_values = defaults(base + ['authentication', 'local_users', 'username'])

        for username in vyos_dict_search('authentication.local_users.username', pppoe):
            pppoe['authentication']['local_users']['username'][username] = dict_merge(
                default_values, pppoe['authentication']['local_users']['username'][username])

    return pppoe


def verify(pppoe):
    if not pppoe:
        return None

    # vertify auth settings
    if vyos_dict_search('authentication.mode', pppoe) == 'local':
        if not vyos_dict_search('authentication.local_users', pppoe):
            raise ConfigError('PPPoE local auth mode requires local users to be configured!')

        for user in vyos_dict_search('authentication.local_users.username', pppoe):
            user_config = pppoe['authentication']['local_users']['username'][user]

            if 'password' not in user_config:
                raise ConfigError(f'Password required for local user "{user}"')

            if 'rate_limit' in user_config:
                # if up/download is set, check that both have a value
                if not {'upload', 'download'} <= set(user_config['rate_limit']):
                    raise ConfigError(f'User "{user}" has rate-limit configured for only one ' \
                                      'direction but both upload and download must be given!')

    elif vyos_dict_search('authentication.mode', pppoe) == 'radius':
        if not vyos_dict_search('authentication.radius.server', pppoe):
            raise ConfigError('RADIUS authentication requires at least one server')

        for server in vyos_dict_search('authentication.radius.server', pppoe):
            radius_config = pppoe['authentication']['radius']['server'][server]
            if 'key' not in radius_config:
                raise ConfigError(f'Missing RADIUS secret key for server "{server}"')

    if 'wins_server' in pppoe and len(pppoe['wins_server']) > 2:
        raise ConfigError('Not more then two IPv4 WINS name-servers can be configured')

    if 'name_server_ipv4' in pppoe:
        if len(pppoe['name_server_ipv4']) > 2:
            raise ConfigError('Not more then two IPv4 DNS name-servers ' \
                              'can be configured')

    if 'name_server_ipv6' in pppoe:
        if len(pppoe['name_server_ipv6']) > 2:
            raise ConfigError('Not more then three IPv6 DNS name-servers ' \
                              'can be configured')

    if 'interface' not in pppoe:
        raise ConfigError('At least one listen interface must be defined!')

    if 'local_ip' not in pppoe:
        raise ConfigError('PPPoE server requires local-ip to be configured!')

    # local ippool and gateway settings config checks
    if not (vyos_dict_search('client_ip_pool.subnet', pppoe) or
           (vyos_dict_search('client_ip_pool.start', pppoe) and
            vyos_dict_search('client_ip_pool.stop', pppoe))):
        print('Warning: No PPPoE client pool defined')

    if vyos_dict_search('authentication.radius.dynamic_author.server', pppoe):
        if not vyos_dict_search('authentication.radius.dynamic_author.key', pppoe):
            raise ConfigError('DA/CoE server key required!')

    return None


def generate(pppoe):
    if not pppoe:
        return None

    render(pppoe_conf, 'accel-ppp/pppoe.config.tmpl', pppoe, trim_blocks=True)

    if vyos_dict_search('authentication.mode', pppoe) == 'local':
        render(pppoe_chap_secrets, 'accel-ppp/chap-secrets.pppoe.tmpl', pppoe, trim_blocks=True, permission=0o640)
    else:
        if os.path.exists(pppoe_chap_secrets):
            os.unlink(pppoe_chap_secrets)

    return None


def apply(pppoe):
    if not pppoe:
        call('systemctl stop accel-ppp@pppoe.service')
        for file in [pppoe_conf, pppoe_chap_secrets]:
            if os.path.exists(file):
                os.unlink(file)

        return None

    call('systemctl restart accel-ppp@pppoe.service')

if __name__ == '__main__':
    try:
        c = get_config()
        verify(c)
        generate(c)
        apply(c)
    except ConfigError as e:
        print(e)
        exit(1)