DHCPv6 (`dhcpv6`)

Layer: Application and control
Header: variable length
Notes: Application protocols

Reached from

Lower layer	Selector	Value
`udp`	`dst_port` / `src_port`	546 (0x0222)
`udp`	`dst_port` / `src_port`	547 (0x0223)

Fields

Field	Type	Default	Description
`msg_type`	`enum(8)`	`1` (solicit)	DHCPv6 message type (Solicit, Advertise, Request, Reply, Relay-Forward, …).
`transaction_id`	`uint(24)`	`4660`	24-bit transaction ID.
`options`	`tlv` — rest of the PDU	3 items	DHCPv6 options (16-bit code / length; Client ID, IA_NA, Relay Message, …).

`msg_type`

Value	Name
1 (0x01)	`solicit`
2 (0x02)	`advertise`
3 (0x03)	`request`
4 (0x04)	`confirm`
5 (0x05)	`renew`
6 (0x06)	`rebind`
7 (0x07)	`reply`
8 (0x08)	`release`
9 (0x09)	`decline`
10 (0x0a)	`reconfigure`
11 (0x0b)	`information_request`
12 (0x0c)	`relay_forw`
13 (0x0d)	`relay_repl`

`options`

Type 16 bits, length 16 bits.
The length counts the value only.
Unknown types are kept as raw value octets.

Type	Name	Value fields
1 (0x0001)	`client_id`
2 (0x0002)	`server_id`
3 (0x0003)	`ia_na`	`iaid`, `t1`, `t2`, `options`
4 (0x0004)	`ia_ta`	`iaid`, `options`
6 (0x0006)	`oro`	`codes`
7 (0x0007)	`preference`	`value`
8 (0x0008)	`elapsed_time`	`time`
9 (0x0009)	`relay_message`
13 (0x000d)	`status_code`	`code`, `message`
14 (0x000e)	`rapid_commit`
18 (0x0012)	`interface_id`
23 (0x0017)	`dns_servers`	`addresses`
24 (0x0018)	`domain_list`
25 (0x0019)	`ia_pd`	`iaid`, `t1`, `t2`, `options`
37 (0x0025)	`remote_id`	`enterprise`, `id`

`options` › `ia_na`

Field	Type	Default	Auto	Description
`iaid`	`uint(32)`
`t1`	`uint(32)`
`t2`	`uint(32)`
`options`	`tlv` — rest of the PDU

`options` › `ia_na` › `options`

Type 16 bits, length 16 bits.
The length counts the value only.
Unknown types are kept as raw value octets.

Type	Name	Value fields
5 (0x0005)	`ia_addr`	`address`, `preferred_lifetime`, `valid_lifetime`
13 (0x000d)	`status_code`	`code`, `message`
26 (0x001a)	`ia_prefix`	`preferred_lifetime`, `valid_lifetime`, `prefix_length`, `prefix`

`options` › `ia_na` › `options` › `ia_addr`

Field	Type	Default	Auto	Description
`address`	`ipv6`
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`

`options` › `ia_na` › `options` › `status_code`

Field	Type	Default	Auto	Description
`code`	`uint(16)`
`message`	`bytes` — rest of the PDU

`options` › `ia_na` › `options` › `ia_prefix`

Field	Type	Default	Auto	Description
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`
`prefix_length`	`uint(8)`
`prefix`	`ipv6`

`options` › `ia_ta`

Field	Type	Default	Auto	Description
`iaid`	`uint(32)`
`options`	`tlv` — rest of the PDU

`options` › `ia_ta` › `options`

Type 16 bits, length 16 bits.
The length counts the value only.
Unknown types are kept as raw value octets.

Type	Name	Value fields
5 (0x0005)	`ia_addr`	`address`, `preferred_lifetime`, `valid_lifetime`
13 (0x000d)	`status_code`	`code`, `message`
26 (0x001a)	`ia_prefix`	`preferred_lifetime`, `valid_lifetime`, `prefix_length`, `prefix`

`options` › `ia_ta` › `options` › `ia_addr`

Field	Type	Default	Auto	Description
`address`	`ipv6`
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`

`options` › `ia_ta` › `options` › `status_code`

Field	Type	Default	Auto	Description
`code`	`uint(16)`
`message`	`bytes` — rest of the PDU

`options` › `ia_ta` › `options` › `ia_prefix`

Field	Type	Default	Auto	Description
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`
`prefix_length`	`uint(8)`
`prefix`	`ipv6`

`options` › `oro`

Field	Type	Default	Auto	Description
`codes`	`list<uint(16)>` — rest of the PDU

`options` › `preference`

Field	Type	Default	Auto	Description
`value`	`uint(8)`

`options` › `elapsed_time`

Field	Type	Default	Auto	Description
`time`	`uint(16)`

`options` › `status_code`

Field	Type	Default	Auto	Description
`code`	`uint(16)`
`message`	`bytes` — rest of the PDU

`options` › `dns_servers`

Field	Type	Default	Auto	Description
`addresses`	`list<ipv6>` — rest of the PDU

`options` › `ia_pd`

Field	Type	Default	Auto	Description
`iaid`	`uint(32)`
`t1`	`uint(32)`
`t2`	`uint(32)`
`options`	`tlv` — rest of the PDU

`options` › `ia_pd` › `options`

Type 16 bits, length 16 bits.
The length counts the value only.
Unknown types are kept as raw value octets.

Type	Name	Value fields
5 (0x0005)	`ia_addr`	`address`, `preferred_lifetime`, `valid_lifetime`
13 (0x000d)	`status_code`	`code`, `message`
26 (0x001a)	`ia_prefix`	`preferred_lifetime`, `valid_lifetime`, `prefix_length`, `prefix`

`options` › `ia_pd` › `options` › `ia_addr`

Field	Type	Default	Auto	Description
`address`	`ipv6`
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`

`options` › `ia_pd` › `options` › `status_code`

Field	Type	Default	Auto	Description
`code`	`uint(16)`
`message`	`bytes` — rest of the PDU

`options` › `ia_pd` › `options` › `ia_prefix`

Field	Type	Default	Auto	Description
`preferred_lifetime`	`uint(32)`
`valid_lifetime`	`uint(32)`
`prefix_length`	`uint(8)`
`prefix`	`ipv6`

`options` › `remote_id`

Field	Type	Default	Auto	Description
`enterprise`	`uint(32)`
`id`	`bytes` — rest of the PDU

Next layer

The next layer is selected by msg_type; when the field is Auto the builder writes the value of the protocol stacked above.

Value	Protocol	Note
12 (0x0c)	`dhcpv6_relay`	re-decodes this layer
13 (0x0d)	`dhcpv6_relay`	re-decodes this layer

Sample templates

dhcpv6-solicit — templates/protocols/app/dhcpv6-solicit.wpg.yaml

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