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-rwxr-xr-xsrc/conf_mode/dhcp_relay.py75
1 files changed, 19 insertions, 56 deletions
diff --git a/src/conf_mode/dhcp_relay.py b/src/conf_mode/dhcp_relay.py
index 34b3fabb7..6352e0b4a 100755
--- a/src/conf_mode/dhcp_relay.py
+++ b/src/conf_mode/dhcp_relay.py
@@ -19,81 +19,43 @@ import os
from sys import exit
from vyos.config import Config
+from vyos.configdict import dict_merge
from vyos.template import render
from vyos.util import call
+from vyos.util import dict_search
+from vyos.xml import defaults
from vyos import ConfigError
-
from vyos import airbag
airbag.enable()
config_file = r'/run/dhcp-relay/dhcrelay.conf'
-default_config_data = {
- 'interface': [],
- 'server': [],
- 'options': [],
- 'hop_count': '10',
- 'relay_agent_packets': 'forward'
-}
-
def get_config(config=None):
- relay = default_config_data
if config:
conf = config
else:
conf = Config()
- if not conf.exists(['service', 'dhcp-relay']):
+ base = ['service', 'dhcp-relay']
+ if not conf.exists(base):
return None
- else:
- conf.set_level(['service', 'dhcp-relay'])
-
- # Network interfaces to listen on
- if conf.exists(['interface']):
- relay['interface'] = conf.return_values(['interface'])
-
- # Servers equal to the address of the DHCP server(s)
- if conf.exists(['server']):
- relay['server'] = conf.return_values(['server'])
-
- conf.set_level(['service', 'dhcp-relay', 'relay-options'])
-
- if conf.exists(['hop-count']):
- count = '-c ' + conf.return_value(['hop-count'])
- relay['options'].append(count)
-
- # Specify the maximum packet size to send to a DHCPv4/BOOTP server.
- # This might be done to allow sufficient space for addition of relay agent
- # options while still fitting into the Ethernet MTU size.
- #
- # Available in DHCPv4 mode only:
- if conf.exists(['max-size']):
- size = '-A ' + conf.return_value(['max-size'])
- relay['options'].append(size)
-
- # Control the handling of incoming DHCPv4 packets which already contain
- # relay agent options. If such a packet does not have giaddr set in its
- # header, the DHCP standard requires that the packet be discarded. However,
- # if giaddr is set, the relay agent may handle the situation in four ways:
- # It may append its own set of relay options to the packet, leaving the
- # supplied option field intact; it may replace the existing agent option
- # field; it may forward the packet unchanged; or, it may discard it.
- #
- # Available in DHCPv4 mode only:
- if conf.exists(['relay-agents-packets']):
- pkt = '-a -m ' + conf.return_value(['relay-agents-packets'])
- relay['options'].append(pkt)
+
+ relay = 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)
+ relay = dict_merge(default_values, relay)
return relay
def verify(relay):
# bail out early - looks like removal from running config
- if relay is None:
+ if not relay:
return None
- if 'lo' in relay['interface']:
+ if 'lo' in (dict_search('interface', relay) or []):
raise ConfigError('DHCP relay does not support the loopback interface.')
- if len(relay['server']) == 0:
+ if 'server' not in relay :
raise ConfigError('No DHCP relay server(s) configured.\n' \
'At least one DHCP relay server required.')
@@ -108,13 +70,14 @@ def generate(relay):
return None
def apply(relay):
- if relay:
- call('systemctl restart isc-dhcp-relay.service')
- else:
- # DHCP relay support is removed in the commit
+ # bail out early - looks like removal from running config
+ if not relay:
call('systemctl stop isc-dhcp-relay.service')
if os.path.exists(config_file):
os.unlink(config_file)
+ return None
+
+ call('systemctl restart isc-dhcp-relay.service')
return None