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authorsarthurdev <965089+sarthurdev@users.noreply.github.com>2024-01-09 22:48:55 +0100
committersarthurdev <965089+sarthurdev@users.noreply.github.com>2024-01-10 00:42:22 +0100
commit41913f4d1d63ddd39d9125b0140b8a33449c2cfb (patch)
tree1fb7ff1b452f13cc2af4c6c48d738729dc71e4ef /src/conf_mode/service_dhcp-server.py
parent39bf15289ca10ff5b61eb4070292ffb13f53e94e (diff)
downloadvyos-1x-41913f4d1d63ddd39d9125b0140b8a33449c2cfb.tar.gz
vyos-1x-41913f4d1d63ddd39d9125b0140b8a33449c2cfb.zip
dhcp: T5787: Prevent duplicate IP addresses on static mappings
Diffstat (limited to 'src/conf_mode/service_dhcp-server.py')
-rwxr-xr-xsrc/conf_mode/service_dhcp-server.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/conf_mode/service_dhcp-server.py b/src/conf_mode/service_dhcp-server.py
index 329e18993..ceaba019e 100755
--- a/src/conf_mode/service_dhcp-server.py
+++ b/src/conf_mode/service_dhcp-server.py
@@ -223,6 +223,7 @@ def verify(dhcp):
if 'static_mapping' in subnet_config:
# Static mappings require just a MAC address (will use an IP from the dynamic pool if IP is not set)
+ used_ips = []
for mapping, mapping_config in subnet_config['static_mapping'].items():
if 'ip_address' in mapping_config:
if ip_address(mapping_config['ip_address']) not in ip_network(subnet):
@@ -234,6 +235,11 @@ def verify(dhcp):
raise ConfigError(f'Either MAC address or Client identifier (DUID) is required for '
f'static mapping "{mapping}" within shared-network "{network}, {subnet}"!')
+ if mapping_config['ip_address'] in used_ips:
+ raise ConfigError(f'Configured IP address for static mapping "{mapping}" exists on another static mapping')
+
+ used_ips.append(mapping_config['ip_address'])
+
# There must be one subnet connected to a listen interface.
# This only counts if the network itself is not disabled!
if 'disable' not in network_config: