diff options
| -rw-r--r-- | interface-definitions/protocols-mpls.xml.in | 2 | ||||
| -rw-r--r-- | op-mode-definitions/clear-dhcp-server-lease.xml.in | 20 | ||||
| -rwxr-xr-x | src/op_mode/clear_dhcp_lease.py | 73 |
3 files changed, 94 insertions, 1 deletions
diff --git a/interface-definitions/protocols-mpls.xml.in b/interface-definitions/protocols-mpls.xml.in index de1aa436d..a9de3aa14 100644 --- a/interface-definitions/protocols-mpls.xml.in +++ b/interface-definitions/protocols-mpls.xml.in @@ -6,7 +6,7 @@ <node name="mpls" owner="${vyos_conf_scripts_dir}/protocols_mpls.py"> <properties> <help>Multiprotocol Label Switching (MPLS)</help> - <priority>299</priority> + <priority>400</priority> </properties> <children> <node name="ldp"> diff --git a/op-mode-definitions/clear-dhcp-server-lease.xml.in b/op-mode-definitions/clear-dhcp-server-lease.xml.in new file mode 100644 index 000000000..b1241588c --- /dev/null +++ b/op-mode-definitions/clear-dhcp-server-lease.xml.in @@ -0,0 +1,20 @@ +<?xml version="1.0"?> +<interfaceDefinition> + <node name="clear"> + <children> + <node name="dhcp-server"> + <properties> + <help>clear DHCP server lease</help> + </properties> + <children> + <tagNode name="lease"> + <properties> + <help>DHCP server lease</help> + </properties> + <command>sudo ${vyos_op_scripts_dir}/clear_dhcp_lease.py --ip $4</command> + </tagNode> + </children> + </node> + </children> + </node> +</interfaceDefinition> diff --git a/src/op_mode/clear_dhcp_lease.py b/src/op_mode/clear_dhcp_lease.py new file mode 100755 index 000000000..6ac3d4c1c --- /dev/null +++ b/src/op_mode/clear_dhcp_lease.py @@ -0,0 +1,73 @@ +#!/usr/bin/env python3 + +import argparse +import re + +from isc_dhcp_leases import Lease +from isc_dhcp_leases import IscDhcpLeases + +from vyos.configquery import ConfigTreeQuery +from vyos.util import ask_yes_no +from vyos.util import call + + +config = ConfigTreeQuery() +base = ['service', 'dhcp-server'] +lease_file = '/config/dhcpd.leases' + + +def del_lease_ip(address): + """ + Read lease_file and write data to this file + without specific section "lease ip" + Delete section "lease x.x.x.x { x;x;x; }" + """ + with open(lease_file, encoding='utf-8') as f: + data = f.read().rstrip() + lease_config_ip = '{(?P<config>[\s\S]+?)\n}' + pattern = rf"lease {address} {lease_config_ip}" + # Delete lease for ip block + data = re.sub(pattern, '', data) + + # Write new data to original lease_file + with open(lease_file, 'w', encoding='utf-8') as f: + f.write(data) + +def is_ip_in_leases(address): + """ + Return True if address found in the lease file + """ + leases = IscDhcpLeases(lease_file) + lease_ips = [] + for lease in leases.get(): + lease_ips.append(lease.ip) + if address not in lease_ips: + print(f'Address "{address}" not found in "{lease_file}"') + return False + return True + + +if not config.exists(base): + print('DHCP-server not configured!') + exit(0) + +if config.exists(base + ['failover']): + print('Lease cannot be reset in failover mode!') + exit(0) + + +if __name__ == '__main__': + parser = argparse.ArgumentParser() + parser.add_argument('--ip', help='IPv4 address', action='store', required=True) + + args = parser.parse_args() + address = args.ip + + if not is_ip_in_leases(address): + exit(1) + + if not ask_yes_no(f'This will restart DHCP server.\nContinue?'): + exit(1) + else: + del_lease_ip(address) + call('systemctl restart isc-dhcp-server.service') |