Enum MessageOptions 

pub enum MessageOptions {
    Pad,
    Netmask(AddressOption),
    TimeOffset(TimeOffset),
    Router(AddressListOption),
    DnsServer(AddressListOption),
    HostName(StringOption),
    DomainName(StringOption),
    Broadcast(AddressOption),
    RequestedIp(AddressOption),
    LeaseTime(TimeOption),
    Overload(OverloadOptions),
    MessageType(MessageTypes),
    ServerIdentifier(AddressOption),
    RequestedOptions(Vec<u8>),
    Message(StringOption),
    MaxMessage(MaxMessage),
    T1(TimeOption),
    T2(TimeOption),
    VendorId(OpaqueOption),
    ClientId(OpaqueOption),
    SName(SNameOption),
    FileName(FileOption),
    RapidCommit,
    SubnetSelect(AddressOption),
    End,
    Other(u8, u8, Vec<u8>),
}

Variants of an options field in Message. Options are also referred to as “configuration parameters”.

Most options are documented in RFC-2132 unless noted otherwise.

Variants

Pad

0

Netmask(AddressOption)

1

TimeOffset(TimeOffset)

2, Deprecated by options 100 and 101 in RFC-4833

Router(AddressListOption)

3

DnsServer(AddressListOption)

6

HostName(StringOption)

12 See RFC 1035 for character set restrictions.

DomainName(StringOption)

15

Broadcast(AddressOption)

28

RequestedIp(AddressOption)

50

LeaseTime(TimeOption)

51

Number of seconds an ip assignment is valid for. A client may use this option in a Discover or Request MessageType. A server may use this option in a Offer MessageType.

Overload(OverloadOptions)

52

MessageType(MessageTypes)

53

ServerIdentifier(AddressOption)

54

RequestedOptions(Vec<u8>)

55

Message(StringOption)

56

MaxMessage(MaxMessage)

57

T1(TimeOption)

58

T2(TimeOption)

59

VendorId(OpaqueOption)

60

ClientId(OpaqueOption)

61

SName(SNameOption)

66, variable length unlike the fixed Message field

FileName(FileOption)

67, variable length unlike the fixed Message field

RapidCommit

80, RFC-4039

Used to assign an IP through a faster 2-message (Discover-Ack) exchange instead of the traditional 4-message (Discover-Offer-Request-Ack) exchange.

Warning: A client broadcasts its Discover message, so multiple DHCP servers on the same subnet might receive it. In such a scenario:

• A 4-message exchange Requests an IP address from one of the DHCP servers.
• A 2-message exchange would commit an IP address from each DHCP server.

A client may use this option only in a Discover MessageType. A server may use this option only in an Ack MessageType.

SubnetSelect(AddressOption)

118, RFC-3011

End

255

Other(u8, u8, Vec<u8>)

Unknown option

Implementations

impl MessageOptions

pub fn to_tag(&self) -> u8

Converts a MessageOption’s enum to a u8 that describes the “T” (tag) in “TLV” (tag-length-value)

pub fn extend_into(&self, bytes: &mut Vec<u8>)

for use when encoding a collection of options into bytes

pub fn from_bytes(bytes: &[u8]) -> Vec<Self>

Takes an array slice and parses the TLV sub-format

Trait Implementations

impl Clone for MessageOptions

fn clone(&self) -> MessageOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MessageOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MessageOptions

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MessageOptions

fn eq(&self, other: &MessageOptions) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MessageOptions

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MessageOptions