path: root/doc/examples/kea4/all-options.json

// This example configuration file for DHCPv4 server in Kea contains:
//
// - data for all the standard options
// - custom option definitions at global level along with some associated
// option data
// - custom option data with standardized option spaces other than "dhcp4"
// - custom option spaces
// - option embedding examples
//
// The reader is strongly encouraged to take a look at the option formats
// documented in the Kea ARM:
// https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html?highlight=list%20of%20standard%20dhcpv4#id2

{
  "Dhcp4": {
    /*                Data for all standard option definitions                */
    // Option data defined globally
    "option-data": [
      /*
       Code   Len        Time Offset
      +-----+-----+-----+-----+-----+-----+
      |  2  |  4  |  n1 |  n2 |  n3 |  n4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: int32
      {
        "code": 2,
        "data": "-25200",
        "name": "time-offset"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  3  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 3,
        "data": "192.0.2.2, 192.0.2.3",
        "name": "routers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  4  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 4,
        "data": "192.0.2.4, 192.0.2.5",
        "name": "time-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  5  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 5,
        "data": "192.0.2.6, 192.0.2.7",
        "name": "name-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  6  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 6,
        "data": "192.0.2.8, 192.0.2.9",
        "name": "domain-name-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  7  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 7,
        "data": "192.0.2.10, 192.0.2.11",
        "name": "log-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  8  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 8,
        "data": "192.0.2.12, 192.0.2.13",
        "name": "cookie-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  9  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 9,
        "data": "192.0.2.14, 192.0.2.15",
        "name": "lpr-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  10 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 10,
        "data": "192.0.2.16, 192.0.2.17",
        "name": "impress-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  11 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 11,
        "data": "192.0.2.18, 192.0.2.19",
        "name": "resource-location-servers"
      },

      /*
       Code   Len   File Size
      +-----+-----+-----+-----+
      |  13 |  2  |  l1 |  l2 |
      +-----+-----+-----+-----+
      */
      // Type: uint16
      {
        "code": 13,
        "data": "1024",
        "name": "boot-size"
      },

      /*
       Code   Len      Dump File Pathname
      +-----+-----+-----+-----+-----+-----+---
      |  14 |  n  |  n1 |  n2 |  n3 |  n4 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 14,
        "data": "/etc/crash-dump.img",
        "name": "merit-dump"
      },

      /*
       Code   Len        Domain Name
      +-----+-----+-----+-----+-----+-----+--
      |  15 |  n  |  d1 |  d2 |  d3 |  d4 |  ...
      +-----+-----+-----+-----+-----+-----+--
      */
      // Type: FQDN
      {
        "code": 15,
        "data": "my.example.org",
        "name": "domain-name"
      },

      /*
       Code   Len    Swap Server Address
      +-----+-----+-----+-----+-----+-----+
      |  16 |  n  |  a1 |  a2 |  a3 |  a4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: IPv4 address
      {
        "code": 16,
        "data": "192.0.2.20",
        "name": "swap-server"
      },

      /*
       Code   Len      Root Disk Pathname
      +-----+-----+-----+-----+-----+-----+---
      |  17 |  n  |  n1 |  n2 |  n3 |  n4 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 17,
        "data": "/path/to/root",
        "name": "root-path"
      },

      /*
       Code   Len      Extensions Pathname
      +-----+-----+-----+-----+-----+-----+---
      |  18 |  n  |  n1 |  n2 |  n3 |  n4 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 18,
        "data": "/path/to/extensions",
        "name": "extensions-path"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  19 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 19,
        "data": "true",
        "name": "ip-forwarding"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  20 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 20,
        "data": "true",
        "name": "non-local-source-routing"
      },

      /*
       Code   Len         Address 1                  Mask 1
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
      |  21 |  n  |  a1 |  a2 |  a3 |  a4 |  m1 |  m2 |  m3 |  m4 |
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
              Address 2                  Mask 2
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      |  a1 |  a2 |  a3 |  a4 |  m1 |  m2 |  m3 |  m4 | ...
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {IPv4 address}
      {
        "code": 21,
        "data": "192.0.2.21, 192.0.2.22",
        "name": "policy-filter"
      },

      /*
       Code   Len      Size
      +-----+-----+-----+-----+
      |  22 |  2  |  s1 |  s2 |
      +-----+-----+-----+-----+
      */
      // Type: uint16
      {
        "code": 22,
        "data": "2048",
        "name": "max-dgram-reassembly"
      },

      /*
       Code   Len   TTL
      +-----+-----+-----+
      |  23 |  1  | ttl |
      +-----+-----+-----+
      */
      // Type: uint8
      {
        "code": 23,
        "data": "248",
        "name": "default-ip-ttl"
      },

      /*
       Code   Len           Timeout
      +-----+-----+-----+-----+-----+-----+
      |  24 |  4  |  t1 |  t2 |  t3 |  t4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: uint32
      {
        "code": 24,
        "data": "131072",
        "name": "path-mtu-aging-timeout"
      },

      /*
       Code   Len     Size 1      Size 2
      +-----+-----+-----+-----+-----+-----+---
      |  25 |  n  |  s1 |  s2 |  s1 |  s2 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {uint16}
      {
        "code": 25,
        "data": "3072, 4096",
        "name": "path-mtu-plateau-table"
      },

      /*
       Code   Len      MTU
      +-----+-----+-----+-----+
      |  26 |  2  |  m1 |  m2 |
      +-----+-----+-----+-----+
      */
      // Type: uint16
      {
        "code": 26,
        "data": "5120",
        "name": "interface-mtu"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  27 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 27,
        "data": "true",
        "name": "all-subnets-local"
      },

      /*
       Code   Len     Broadcast Address
      +-----+-----+-----+-----+-----+-----+
      |  28 |  4  |  b1 |  b2 |  b3 |  b4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: IPv4 address
      {
        "code": 28,
        "data": "192.0.2.255",
        "name": "broadcast-address"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  29 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 29,
        "data": "true",
        "name": "perform-mask-discovery"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  30 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 30,
        "data": "true",
        "name": "mask-supplier"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  31 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 31,
        "data": "true",
        "name": "router-discovery"
      },

      /*
       Code   Len            Address
      +-----+-----+-----+-----+-----+-----+
      |  32 |  4  |  a1 |  a2 |  a3 |  a4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: IPv4 address
      {
        "code": 32,
        "data": "192.0.2.23",
        "name": "router-solicitation-address"
      },

      /*
       Code   Len         Destination 1           Router 1
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
      |  33 |  n  |  d1 |  d2 |  d3 |  d4 |  r1 |  r2 |  r3 |  r4 |
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
              Destination 2           Router 2
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      |  d1 |  d2 |  d3 |  d4 |  r1 |  r2 |  r3 |  r4 | ...
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {IPv4 address}
      {
        "code": 33,
        "data": "192.0.2.24, 192.0.2.25",
        "name": "static-routes"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  34 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 34,
        "data": "true",
        "name": "trailer-encapsulation"
      },

      /*
       Code   Len           Time
      +-----+-----+-----+-----+-----+-----+
      |  35 |  4  |  t1 |  t2 |  t3 |  t4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: uint32
      {
        "code": 35,
        "data": "196608",
        "name": "arp-cache-timeout"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  36 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 36,
        "data": "true",
        "name": "ieee802-3-encapsulation"
      },

      /*
       Code   Len   TTL
      +-----+-----+-----+
      |  37 |  1  |  n  |
      +-----+-----+-----+
      */
      // Type: uint8
      {
        "code": 37,
        "data": "124",
        "name": "default-tcp-ttl"
      },

      /*
       Code   Len           Time
      +-----+-----+-----+-----+-----+-----+
      |  38 |  4  |  t1 |  t2 |  t3 |  t4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: uint32
      {
        "code": 38,
        "data": "262144",
        "name": "tcp-keepalive-interval"
      },

      /*
       Code   Len  Value
      +-----+-----+-----+
      |  39 |  1  | 0/1 |
      +-----+-----+-----+
      */
      // Type: boolean
      {
        "code": 39,
        "data": "true",
        "name": "tcp-keepalive-garbage"
      },

      /*
       Code   Len      NIS Domain Name
      +-----+-----+-----+-----+-----+-----+---
      |  40 |  n  |  n1 |  n2 |  n3 |  n4 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 40,
        "data": "nis.example.org",
        "name": "nis-domain"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  41 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 41,
        "data": "192.0.2.26, 192.0.2.27",
        "name": "nis-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  42 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 42,
        "data": "192.0.2.28, 192.0.2.29",
        "name": "ntp-servers"
      },

      /*
       Code   Len   Vendor-specific information
      +-----+-----+-----+-----+---
      |  43 |  n  |  i1 |  i2 | ...
      +-----+-----+-----+-----+---

       Code   Len   Data item        Code   Len   Data item       Code
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
      |  T1 |  n  |  d1 |  d2 | ... |  T2 |  n  |  D1 |  D2 | ... | ... |
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
      */
      // Type: empty
      {
        "code": 43,
        "name": "vendor-encapsulated-options"
      },

      /*
       Code   Len           Address 1              Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+----
      |  44 |  n  |  a1 |  a2 |  a3 |  a4 |  b1 |  b2 |  b3 |  b4 | ...
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+----
      */
      // Type: array of {IPv4 address}
      {
        "code": 44,
        "data": "192.0.2.30, 192.0.2.31",
        "name": "netbios-name-servers"
      },

      /*
       Code   Len           Address 1              Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+----
      |  45 |  n  |  a1 |  a2 |  a3 |  a4 |  b1 |  b2 |  b3 |  b4 | ...
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+----
      */
      // Type: array of {IPv4 address}
      {
        "code": 45,
        "data": "192.0.2.32, 192.0.2.33",
        "name": "netbios-dd-server"
      },

      /*
      Value         Node Type
      -----         ---------
      0x1           B-node
      0x2           P-node
      0x4           M-node
      0x8           H-node

       Code   Len  Node Type
      +-----+-----+-----------+
      |  46 |  1  | see above |
      +-----+-----+-----------+
      */
      // Type: uint8
      {
        "code": 46,
        "data": "0x1",
        "name": "netbios-node-type"
      },

      /*
       Code   Len       NetBIOS Scope
      +-----+-----+-----+-----+-----+-----+----
      |  47 |  n  |  s1 |  s2 |  s3 |  s4 | ...
      +-----+-----+-----+-----+-----+-----+----
      */
      // Type: string
      {
        "code": 47,
        "data": "scope42",
        "name": "netbios-scope"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      |  48 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |   ...
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {IPv4 address}
      {
        "code": 48,
        "data": "192.0.2.34, 192.0.2.35",
        "name": "font-servers"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      |  49 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |   ...
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {IPv4 address}
      {
        "code": 49,
        "data": "192.0.2.36, 192.0.2.37",
        "name": "x-display-manager"
      },

      /*
      Value   Meaning
      -----   --------
        1     the 'file' field is used to hold options
        2     the 'sname' field is used to hold options
        3     both fields are used to hold options

       Code   Len  Value
      +-----+-----+-----+
      |  52 |  1  |1/2/3|
      +-----+-----+-----+
      */
      // Type: uint8
      {
        "code": 52,
        "data": "3",
        "name": "dhcp-option-overload"
      },

      /*
       Code   Len            Address
      +-----+-----+-----+-----+-----+-----+
      |  54 |  4  |  a1 |  a2 |  a3 |  a4 |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: IPv4 address
      {
        "code": 54,
        "data": "192.0.2.39",
        "name": "dhcp-server-identifier"
      },

      /*
       Code   Len     Text
      +-----+-----+-----+-----+---
      |  56 |  n  |  c1 |  c2 | ...
      +-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 56,
        "data": "Error: here's a DHCPNAK!",
        "name": "dhcp-message"
      },

      /*
       Code   Len     Length
      +-----+-----+-----+-----+
      |  57 |  2  |  l1 |  l2 |
      +-----+-----+-----+-----+
      */
      // Type: uint16
      {
        "code": 57,
        "data": "1536",
        "name": "dhcp-max-message-size"
      },

      /*
       Code   Len   Vendor class Identifier
      +-----+-----+-----+-----+---
      |  60 |  n  |  i1 |  i2 | ...
      +-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 60,
        "data": "ISC",
        "name": "vendor-class-identifier"
      },

      /*
       Code  Len    NetWare/IP Domain Name
      +-----+-----+------+------+------+-----
      |  62 |  n  |  c1  |  c2  |  c3  |  ...
      +-----+-----+------+------+------+-----
      */
      // Type: string
      {
        "code": 62,
        "data": "nwip.example.org",
        "name": "nwip-domain-name"
      },

      /*
       Code   Len  NetWare/IP General Info
      +-----+-----+----+----+
      | 63  | 11  | 2  |  0 |
      +-----+-----+----+----+
                   NWIP_EXIST_IN_OPTIONS_AREA (length 0)

                  +----+----+----+
                  |  5 |  1 |  1 |
                  +----+----+----+
                   NSQ_BROADCAST_SERVER (length 1)
                   value is YES

                  +----+----+------------+
                  |  7 |  4 | IP address |
                  +----+----+------------+
                   NEAREST_NWIP_SERVER (length 4)
                   value is IP address of server
      */
      // Type: binary
      {
        "code": 63,
        "data": "1A BB AD AB BA D0 00 00 00 00 00 00 00 00 CA FE",
        "name": "nwip-suboptions"
      },

      /*
       Code   Len      NIS Client Domain Name
      +-----+-----+-----+-----+-----+-----+---
      |  64 |  n  |  n1 |  n2 |  n3 |  n4 | ...
      +-----+-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 64,
        "data": "nisplus.example.org",
        "name": "nisplus-domain-name"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      |  65 |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: IPv4 address
      {
        "code": 65,
        "data": "192.0.2.40",
        "name": "nisplus-servers"
      },

      /*
       Code  Len   TFTP server
      +-----+-----+-----+-----+-----+---
      | 66  |  n  |  c1 |  c2 |  c3 | ...
      +-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 66,
        "data": "tftp.example.org",
        "name": "tftp-server-name"
      },

      /*
       Code  Len   Bootfile name
      +-----+-----+-----+-----+-----+---
      | 67  |  n  |  c1 |  c2 |  c3 | ...
      +-----+-----+-----+-----+-----+---
      */
      // Type: string
      {
        "code": 67,
        "data": "boot-file.img",
        "name": "boot-file-name"
      },

      /*
       Code Len    Home Agent Addresses (zero or more)
      +-----+-----+-----+-----+-----+-----+--
      | 68  |  n  | a1  | a2  | a3  | a4  | ...
      +-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 68,
        "data": "192.0.2.41, 192.0.2.42",
        "name": "mobile-ip-home-agent"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 69  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 69,
        "data": "192.0.2.43, 192.0.2.44",
        "name": "smtp-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 70  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 70,
        "data": "192.0.2.45, 192.0.2.46",
        "name": "pop-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 71  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 71,
        "data": "192.0.2.47, 192.0.2.48",
        "name": "nntp-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 72  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 72,
        "data": "192.0.2.49, 192.0.2.50",
        "name": "www-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 73  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 73,
        "data": "192.0.2.51, 192.0.2.52",
        "name": "finger-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 74  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 74,
        "data": "192.0.2.53, 192.0.2.54",
        "name": "irc-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 75  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 75,
        "data": "192.0.2.55, 192.0.2.56",
        "name": "streettalk-server"
      },

      /*
       Code   Len         Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      | 76  |  n  |  a1 |  a2 |  a3 |  a4 |  a1 |  a2 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 76,
        "data": "192.0.2.57, 192.0.2.58",
        "name": "streettalk-directory-assistance-server"
      },

      /*
       Code   Len   Value
      +-----+-----+---------------------  . . .  --+
      | 77  |  N  | User Class Data ('Len' octets) |
      +-----+-----+---------------------  . . .  --+
      */
      // Type: binary
      {
        "code": 77,
        "data": "1A BB AD AB BA D0 00 00 00 00 00 00 00 00 CA FE",
        "name": "user-class"
      },

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |   Code = 78   |    Length     |   Mandatory   |      a1       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      a2       |       a3      |       a4      |      ...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      */
      // Type: boolean, array of {IPv4 address}
      {
        "code": 78,
        "data": "true, 192.0.2.59, 192.0.2.60",
        "name": "slp-directory-agent"
      },

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |   Code = 79   |     Length    |   Mandatory   | <Scope List>...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      */
      // Type: boolean, string
      {
        "code": 79,
        "data": "true, slp-scope",
        "name": "slp-service-scope"
      },

      // Option code 80 is not defined in Kea.
      // Option code 83 is not defined in Kea.
      // Option code 84 is unassigned.

      /*
       Code   Len        Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--
      | 85  |  n  |  a1 |  a2 | a3  |  a4 |  a1 |  a2 |  a3 |  a4 |  ...
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of IPv4 address
      {
        "code": 85,
        "data": "192.0.2.61, 192.0.2.62",
        "name": "nds-servers"
      },

      /*
       Code Len  NDS Tree Name
      +----+----+----+----+----+----+--
      | 86 | n  | c1 | c2 | c3 | c4 |  ...
      +----+----+----+----+----+----+--
      */
      // Type: string
      {
        "code": 86,
        "data": "my-tree",
        "name": "nds-tree-name"
      },

      /*
       Code Len  Initial NDS Context
      +----+----+----+----+----+----+--
      | 87 | n  | c1 | c2 | c3 | c4 |  ...
      +----+----+----+----+----+----+--
      */
      // Type: string
      {
        "code": 87,
        "data": "context",
        "name": "nds-context"
      },

      /*
       Code   Len  FQDN(s) of BCMCS Controller
      +-----+-----+-----+-----+-----+-----+-----+--
      | 88  |  n  |  s1 |  s2 |  s3 |  s4 | s5  |  ...
      +-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: FQDN
      {
        "code": 88,
        "data": "bcms-controller.example.org",
        "name": "bcms-controller-names"
      },

      /*
       Code   Len  Address 1               Address 2
      +-----+-----+-----+-----+-----+-----+-----+--
      | 89  |  n  | a1  | a2  | a3  | a4  | a1  |  ...
      +-----+-----+-----+-----+-----+-----+-----+--
      */
      // Type: array of {IPv4 address}
      {
        "code": 89,
        "data": "192.0.2.63",
        "name": "bcms-controller-address"
      },

      /*
       Code  Len  16-bit Type
      +----+-----+-----+-----+
      | 93 |  n  | n1  | n2  |
      +----+-----+-----+-----+
      */
      // Type: array of uint16
      {
        "code": 93,
        "data": "6144, 7168",
        "name": "client-system"
      },

      /*
       Code  Len  Type Major Minor
      +----+-----+----+-----+-----+
      | 94 |  3  |  t |  M  |  m  |
      +----+-----+----+-----+-----+
      */
      // Type: uint8, uint8, uint8
      {
        "code": 94,
        "data": "0, 1, 0",
        "name": "client-ndi"
      },

      // Option code 95 is unsupported.
      // Option code 96 is unassigned.

      /*
       Code  Len  Type  Machine Identifier
      +----+-----+----+-----+ . . . +-----+
      | 97 |  n  |  t |     | . . . |     |
      +----+-----+----+-----+ . . . +-----+
      */
      // Type: uint8, binary
      {
        "code": 97,
        "data": "0, 1A BB AD AB BA D0 00 00 00 00 00 00 00 00 CA FE",
        "name": "uuid-guid"
      },

      /*
      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |     Code      |    Length     |   URL list
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

         Code            98

         Length          The length of the data field (i.e., URL list) in
                         bytes.

         URL list        A list of one or more URLs separated by the ASCII
                         space character (0x20).
      */
      // Type: string
      {
        "code": 98,
        "data": "uap1.example.org uap2.example.org",
        "name": "uap-servers"
      },

      /*
      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      | GEOCONF_CIVIC |       N       |      what     |    country    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |    code       |        civic address elements                ...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      Code GEOCONF_CIVIC:  The code for this DHCP option is 99.

      N:  The length of this option is variable.  The minimum length is 3
         octets.

      what:  The 'what' element describes to which location the DHCP entry
         refers.  Currently, three options are defined: the location of the
         DHCP server (a value of 0), the location of the network element
         believed to be closest to the client (a value of 1), or the
         location of the client (a value of 2).  Option (2) SHOULD be used,
         but may not be known.  Options (0) and (1) SHOULD NOT be used
         unless it is known that the DHCP client is in close physical
         proximity to the server or network element.

      country code:  The two-letter ISO 3166 country code in capital ASCII
         letters, e.g., DE or US.  (Civic addresses always contain country
         designations, suggesting the use of a fixed-format field to save
         space.)

      civic address elements:  Zero or more elements comprising the civic
         and/or postal address, with the format described below
         (Section 3.3).
      */
      // Type: binary
      {
        "code": 99,
        "data": "1A BB AD AB BA D0 00 00 00 00 00 00 00 00 CA FE",
        "name": "geoconf-civic"
      },

      /*
       PCode  Len   TZ-POSIX String
      +-----+-----+------------------------------+
      | 100 |  N  | IEEE 1003.1 String           |
      +-----+-----+------------------------------+
      */
      // Type: string
      {
        "code": 100,
        // String options that have a comma in their values need to have
        // it escaped (i.e. each comma is preceded by two backslashes).
        // That's because commas are reserved for separating fields in
        // compound options. At the same time, we need to be conformant
        // with JSON spec, that does not allow "\,". Therefore the
        // slightly uncommon double backslashes notation is needed.
        // The value sent over the wire is:
        // EST5EDT4,M3.2.0/02:00,M11.1.0/02:00
        "data": "EST5EDT4\\,M3.2.0/02:00\\,M11.1.0/02:00",
        "name": "pcode"
      },

      /*
       TCode  Len   TZ-Database String
      +-----+-----+------------------------------+
      | 101 |  N  | Reference to the TZ Database |
      +-----+-----+------------------------------+
      */
      // Type: string
      {
        "code": 101,
        "data": "Europe/Zurich",
        "name": "tcode"
      },

      // Option codes 102-107 are unassigned.

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |     Code      |   Length      |           Value               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |         Value (cont.)         |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      Code:  8-bit identifier of the IPv6-Only Preferred option code as
         assigned by IANA: 108.  The client includes the Code in the
         Parameter Request List in DHCPDISCOVER and DHCPREQUEST messages as
         described in Section 3.2.

      Length:  8-bit unsigned integer.  The length of the option, excluding
         the Code and Length Fields.  The server MUST set the length field
         to 4.  The client MUST ignore the IPv6-Only Preferred option if
         the length field value is not 4.

      Value:  32-bit unsigned integer.  The number of seconds for which the
         client should disable DHCPv4 (V6ONLY_WAIT configuration variable).
         If the server pool is explicitly configured with a V6ONLY_WAIT
         timer, the server MUST set the field to that configured value.
         Otherwise, the server MUST set it to zero.  The client MUST
         process that field as described in Section 3.2.
      */
      // Type: uint32
      {
        "code": 108,
        "data": "3600",
        "name": "v6-only-preferred"
      },

      // Option codes 109-111 are unassigned.

      // Type: array of {IPv4 address}
      {
        "code": 112,
        "data": "192.0.2.63, 192.0.2.64",
        "name": "netinfo-server-address"
      },

      // Type: string
      {
        "code": 113,
        "data": "server1",
        "name": "netinfo-server-tag"
      },

      // Type: string
      {
        "code": 114,
        "data": "https://default.example.org",
        "name": "v4-captive-portal"
      },

      // Option code 115 is unassigned.

      /*
       Code   Len   Value
      +-----+-----+-----+
      | 116 |  1  |  a  |
      +-----+-----+-----+
      */
      // Type: uint8
      {
        "code": 116,
        "data": "1",
        "name": "auto-config"
      },

      /*
           Code            Length      Name Service Search Order in Sequence
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |     117       |     Len       |             ns1               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |             ns2               |             ...               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      */
      // Type: array of {uint16}
      {
        "code": 117,
        "data": "6, 41, 44, 65",
        "name": "name-service-search"
      },

      /*
       Code   Len        IPv4 Address
      +-----+-----+-----+-----+-----+-----+
      | 118 |  4  | A1  | A2  | A3  | A4  |
      +-----+-----+-----+-----+-----+-----+
      */
      // Type: IPv4 address
      {
        "code": 118,
        "data": "192.0.2.65",
        "name": "subnet-selection"
      },

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |     119       |     Len       |         Searchstring...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                     Searchstring...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      */
      // Type: array of {FQDN}
      {
        "code": 119,
        "data": "example.com, example.org",
        "name": "domain-search"
      },

      // Option codes 120-123 are not defined in Kea.

      /*
                           1 1 1 1 1 1
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |  option-code  |  option-len   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      enterprise-number1       |
      |                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |   data-len1   |               |
      +-+-+-+-+-+-+-+-+               |
      /      vendor-class-data1       /
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ----
      |      enterprise-number2       |   ^
      |                               |   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   |
      |   data-len2   |               | optional
      +-+-+-+-+-+-+-+-+               |   |
      /      vendor-class-data2       /   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   |
      ~            ...                ~   V
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ----

      option-code         OPTION_V-I_VENDOR_CLASS (124)

      option-len          total length of all following option data in
                          octets

      enterprise-numberN  The vendor's 32-bit Enterprise Number as
                          registered with IANA [3]

      data-lenN           Length of vendor-class-data field

      vendor-class-dataN  Details of the hardware configuration of the
                          host on which the client is running, or of
                          industry consortium compliance
      */
      // Type: uint32, binary
      {
        "code": 124,
        "data": "4491, 0f BA AD AB BA D0 00 00 00 00 00 00 00 00 CA FE",
        "name": "vivco-suboptions"
      },

      /*
                           1 1 1 1 1 1
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |  option-code  |  option-len   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      enterprise-number1       |
      |                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |   data-len1   |               |
      +-+-+-+-+-+-+-+-+ option-data1  |
      /                               /
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ----
      |      enterprise-number2       |   ^
      |                               |   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   |
      |   data-len2   |               | optional
      +-+-+-+-+-+-+-+-+ option-data2  |   |
      /                               /   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+   |
      ~            ...                ~   V
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ----

      option-code         OPTION_V-I_VENDOR_OPTS (125)

      option-len          total length of all following option data in
                          octets

      enterprise-numberN  The vendor's registered 32-bit Enterprise Number
                          as registered with IANA [3]

      data-lenN           Length of option-data field

      option-dataN        Vendor-specific options, described below
      */
      // Type: uint32
      {
        "code": 125,
        "data": "4491",
        "name": "vivso-suboptions"
      },

    // Option codes 126-127 are unassigned.
    // Option codes 128-135 are not defined in Kea.

      /*
      0                   1
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |  option-code  | option-length |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                               |
      +      PAA IPv4 Address         +
      |                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |             ...               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         Figure 1: PAA DHCPv4 option

      option-code:        OPTION_PANA_AGENT (136).

      option-length:      Length of the 'options' field in octets;
                          MUST be a multiple of four (4).

      PAA IPv4 Address:   IPv4 address of a PAA for the client to use.
                          The PAAs are listed in the order of preference
                          for use by the client.
      */
      // Type: array of {IPv4 address}
      {
        "code": 136,
        "data": "192.0.2.66, 192.0.2.67",
        "name": "pana-agent"
      },

      /*
      Code    Len   LoST Server Domain Name
      +-----+-----+-----+-----+-----+-----+-----+----
      | 137 |  n  |  s1 |  s2 |  s3 |  s4 | s5  |  ...
      +-----+-----+-----+-----+-----+-----+-----+----
      */
      // Type: FQDN
      {
        "code": 137,
        "data": "lost.example.org",
        "name": "v4-lost"
      },

      /*
      0                   1
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |  option-code  | option-length |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                               |
      +       AC IPv4 Address         +
      |                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |             ...               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      option-code:   OPTION_CAPWAP_AC_V4 (138)

      option-length:   Length of the 'options' field in octets; MUST be a
         multiple of four (4).

      AC IPv4 Address:  IPv4 address of a CAPWAP AC that the WTP may use.
         The ACs are listed in the order of preference for use by the WTP
      */
      // Type: array of {IPv4 address}
      {
        "code": 138,
        "data": "192.0.2.68, 192.0.2.69",
        "name": "capwap-ac-v4"
      },

      // Option codes 139-140 are not defined in Kea.

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |      141      |     Len       |         Searchstring...       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                     Searchstring...                           |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      */
      // Type: array of {FQDN}
      {
        "code": 141,
        "data": "example.com, example.org",
        "name": "sip-ua-cs-domains"
      },

      // Option codes 142-145 are not defined in Kea.

      // Type: uint8, IPv4 address, IPv4 address, array of {FQDN}
      {
        "code": 146,
        "data": "1, 192.0.2.70, 192.0.2.71, example.com, example.org",
        "name": "rdnss-selection"
      },

      // Option codes 147-158 are not defined in Kea.

      // Type: uint8, PSID
      {
        "code": 159,
        "data": "2, 3/4",
        "name": "v4-portparams"
      },

      // Option codes 161-209 are unassigned.

      /*
      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |  OPTION_6RD   | option-length |  IPv4MaskLen  |  6rdPrefixLen |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                                                               |
      |                           6rdPrefix                           |
      |                          (16 octets)                          |
      |                                                               |
      |                                                               |
      |                                                               |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                     6rdBRIPv4Address(es)                      |
      .                                                               .
      .                                                               .
      .                                                               .
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      option-code         OPTION_6RD (212)

      option-length       The length of the DHCP option in octets (22
                          octets with one BR IPv4 address).

      IPv4MaskLen         The number of high-order bits that are identical
                          across all CE IPv4 addresses within a given 6rd
                          domain.  This may be any value between 0 and 32.
                          Any value greater than 32 is invalid.

      6rdPrefixLen        The IPv6 prefix length of the SP's 6rd IPv6
                          prefix in number of bits.  For the purpose of
                          bounds checking by DHCP option processing, the
                          sum of (32 - IPv4MaskLen) + 6rdPrefixLen MUST be
                          less than or equal to 128.

      6rdBRIPv4Address    One or more IPv4 addresses of the 6rd Border
                          Relay(s) for a given 6rd domain.

      6rdPrefix           The service provider's 6rd IPv6 prefix
                          represented as a 16-octet IPv6 address.  The bits
                          in the prefix after the 6rdPrefixlen number of
                          bits are reserved and MUST be initialized to zero
                          by the sender and ignored by the receiver.
      */
      // Type: uint8, uint8, IPv6 address, array of {IPv4 address}
      {
        "code": 212,
        "data": "24, 96, 2001:db8::f001, 192.0.2.72, 192.0.2.73",
        "name": "option-6rd"
      },

      /*
       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |     Code      |   Length      |  Access Network Domain Name   .
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      .            Access Network Domain Name (cont.)                 .
      .                              ...                              .
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      option-code:  OPTION_V4_ACCESS_DOMAIN (213).

      option-length:  The length of the entire access network domain name
         option in octets.

      option-value:  The domain name associated with the access network,
         encoded as described in Section 3.1.
      */
      // Type: FQDN
      {
        "code": 213,
        "data": "example.org",
        "name": "v4-access-domain"
      },

      // Option codes 214-219 are unassigned.
      // Option codes 220-221 are not defined in Kea.
      // Option codes 222-254 are unassigned

      /*                         Custom option data                           */
      // See "option-def" below for the definitions.
      {
        "code": 1,
        "name": "my-empty-option",
        "space": "my-fancy-space"
      },
      {
        "code": 224,
        "data": "192.0.2.74, 3/4, 1, example.org, string",
        "name": "my-lengthy-option",
        "space": "my-fancy-space"
      },
      {
        "code": 254,
        "data": "127, 32767, 2147483647, 255, 65535, 4294967295, 192.0.2.75, 3/4, 1, example.org, string",
        "name": "my-fancy-option",
        "space": "my-fancy-space"
      },
      {
        "code": 232,
        "name": "my-encapsulating-option",
        "space": "my-encapsulating-space"
      }
    ],

    /*                       Custom option definitions                        */
    // For kea-dhcp4, custom option definitions can be global or in a client
    // class.
    "option-def": [
      // New option space allows for a new set of option codes.
      // An empty option requires no "data" in "option-data". It's
      // presence should be sufficient to trigger custom behavior.
      {
        "array": false,
        "code": 1,
        "encapsulate": "",
        "name": "my-empty-option",
        "record-types": "",
        "space": "my-fancy-space",
        "type": "empty"
      },

      // A custom type has "type" set to "record" and all data types (which need
      // to be more than 1, otherwise you're better off using the type directly)
      // are specified in "record-types". If "string" is part of them, it needs
      // to be last.
      {
        "array": false,
        "code": 224,
        "encapsulate": "",
        "name": "my-lengthy-option",
        "record-types": "ipv4-address, psid, tuple, fqdn, string",
        "space": "my-fancy-space",
        "type": "record"
      },

      // Contains arrays of all types except strings since an array of strings
      // is not a valid option definition.
      {
        "array": true,
        "code": 254,
        "encapsulate": "",
        "name": "my-fancy-option",
        "record-types": "int8, int16, int32, uint8, uint16, uint32, ipv4-address, psid, tuple, fqdn",
        "space": "my-fancy-space",
        "type": "record"
      },

      // A single encapsulating space can be used. An option containing any
      // option from said space will now be unpacked successfully by Kea.
      {
        "array": false,
        "code": 232,
        "encapsulate": "my-fancy-space",
        "name": "my-encapsulating-option",
        "record-types": "",
        "space": "my-encapsulating-space",
        "type": "empty"
      }
    ],

    "subnet4": [
      /*                         DOCSIS3 option data                          */
      // Headers are as defined in CL-SP-CANN-DHCP-Reg-I16-200715.
      // "space" is required to be explicitly defined as "docsis3-v4"
      {
        "option-data": [
          /*
           0                   1                   2                   3
           0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          | CL_V4OPTION_ORO|  option-len  | req-opt-code-1| req-opt-code-2|
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          |                              ...                              |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

          option-code   CL_V4OPTION_ORO (1).

          option-len    number of requested options.

          req-opt-code-n The option code for an option requested by the client.

          */
          // Type: array of {uint8}
          {
            "code": 1,
            "data": "32, 42",
            "name": "oro",
            "space": "docsis3-v4"
          },

          /*
           0                   1                   2                   3
           0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          | option code |    option-len   | IPv4 address of TFTP server 1 |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          |  address of server 1 (cont.)  | IPv4 address of TFTP server 2 |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          |  address of server 2 (cont.)  |              ...
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          .               ...             | IPv4 address of TFTP server n |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
          |  address of server n (cont.)  |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

          option code      CL_VV4OPTION_TFTP_SERVERS (2)

          option len       number of bytes for TFTP server IPv4 addresses (4*n for
                           n servers)
          */
          // Type: array of {IPv4 address}
          {
            "code": 2,
            "data": "192.0.2.76, 192.0.2.77",
            "name": "tftp-servers",
            "space": "docsis3-v4"
          }
        ],
        "subnet": "192.0.2.0/24"
      }
    ]
  }
}