kea dhcpでclassless static route配布

kea-dhcp.conf

// kea dhcpでclassless static route配布
{
  "Dhcp4": {
    // ....
    "subnet4": [
      {
        "id": 1,
        "subnet": "192.168.0.0/24",
        "option-data": [
          {
            "space": "dhcp4",
            "name": "routers",
            "code": 3,
            "data": "192.168.0.1"
          },
          {
            "space": "dhcp4",
            "name": "domain-name-servers",
            "code": 6,
            "data": "8.8.8.8, 1.1.1.1"
          },
          // ....
          { // classless-static-routes to tailscale vpn gw
            "space": "dhcp4",
            "name": "classless-static-routes",
            "code": 121,
            // Route to  100.64.0.0/10 192.168.2.0/24 -> 192.168.0.110
            //       ┌───────────┘                192.168.2.0/24 -> 192.168.0.110
            //       |   |   |                  ┌──────────┘                default route
            //       |   |   |                  |  |   |  |                 |
            "data": "10,100,64, 192.168.0.110, 24,192,168,2, 192.168.0.110, 0,192.168.0.1"
            // data format defined at "option-def"
          }
        ]
      }
    ],
    "option-def": [{
      // define option 121
      "name": "classless-static-routes",
      "code": 121,
      "space": "dhcp4",
      "type": "record",
      "record-types": "uint8,uint8,uint8,ipv4-address, uint8,uint8,uint8,uint8,ipv4-address, uint8,ipv4-address"
    }],
  }
}