dhcp-server: T1968: allow multiple static-routes to be configured

vyos@vyos# show service dhcp-server
 shared-network-name LAN {
     subnet 10.0.0.0/24 {
         default-router 10.0.0.1
         dns-server 194.145.150.1
         lease 88
         range 0 {
             start 10.0.0.100
             stop 10.0.0.200
         }
         static-route 192.168.10.0/24 {
             next-hop 10.0.0.2
         }
         static-route 192.168.20.0/24 {
             router 10.0.0.2
         }
     }
 }

1 files changed, 4 insertions, 3 deletions

diff --git a/src/conf_mode/dhcp_server.py b/src/conf_mode/dhcp_server.py
index cdee72e09..8d6cef8b7 100755
--- a/src/conf_mode/dhcp_server.py
+++ b/src/conf_mode/dhcp_server.py
@@ -159,9 +159,10 @@ def verify(dhcp):
                               'lease subnet must be configured.')
 
         for subnet, subnet_config in network_config['subnet'].items():
-            if 'static_route' in subnet_config and len(subnet_config['static_route']) != 2:
-                raise ConfigError('Missing DHCP static-route parameter(s):\n' \
-                                  'destination-subnet | router must be defined!')
+            if 'static_route' in subnet_config:
+                for route, route_option in subnet_config['static_route'].items():
+                    if 'next_hop' not in route_option:
+                        raise ConfigError(f'DHCP static-route "{route}" requires router to be defined!')
 
             # Check if DHCP address range is inside configured subnet declaration
             if 'range' in subnet_config: