Struct GeneveHdr 

#[repr(C, packed(1))]
pub struct GeneveHdr {
    pub ver_opt_len: u8,
    pub o_c_rsvd: u8,
    pub protocol_type: [u8; 2],
    pub vni: [u8; 3],
    pub reserved2: u8,
}

Represents a Geneve (Generic Network Virtualization Encapsulation) header, according to RFC 8926. Geneve is an encapsulation protocol designed for network virtualization.

Fields

ver_opt_len: u8

Combined field: Version (2 bits) and Option Length (6 bits).

o_c_rsvd: u8

Combined field: OAM flag (1 bit), Critical flag (1 bit), Reserved (6 bits).

protocol_type: [u8; 2]

Protocol Type of the encapsulated payload (16 bits).

vni: [u8; 3]

Virtual Network Identifier (VNI) (24 bits).

reserved2: u8

Reserved field (8 bits). MUST be zero on transmission.

Implementations

impl GeneveHdr

pub const LEN: usize = 8usize

The length of the Geneve header in bytes.

pub fn ver(&self) -> u8

Returns the Geneve protocol version (2 bits).

According to RFC 8926, the current version is 0.

pub fn set_ver(&mut self, ver: u8)

Sets the Geneve protocol version (2 bits).

ver should be a 2-bit value (0-3).

pub fn opt_len(&self) -> u8

Returns the length of the option fields in 4-byte multiples (6 bits).

pub fn set_opt_len(&mut self, opt_len: u8)

Sets the length of the option fields (6 bits).

opt_len should be a 6-bit value (0-63).

pub fn o_flag(&self) -> u8

Returns the OAM (Operations, Administration, and Maintenance) packet flag (1 bit).

If set (1), this packet is an OAM packet. Referred to as ‘O’ bit in RFC 8926.

pub fn set_o_flag(&mut self, o_flag: u8)

Sets the OAM packet flag (1 bit).

o_flag should be a 1-bit value (0 or 1).

pub fn c_flag(&self) -> u8

Returns the Critical Options Present flag (1 bit).

If set (1), one or more options are marked as critical. Referred to as ‘C’ bit in RFC 8926.

pub fn set_c_flag(&mut self, c_flag: u8)

Sets the Critical Options Present flag (1 bit).

c_flag should be a 1-bit value (0 or 1).

pub fn protocol_type(&self) -> u16

Returns the Protocol Type of the encapsulated payload (16 bits, network byte order).

This follows the Ethertype convention.

pub fn set_protocol_type(&mut self, protocol_type: u16)

Sets the Protocol Type (16 bits).

The value is stored in network byte order.

pub fn vni(&self) -> u32

Returns the Virtual Network Identifier (VNI) (24 bits).

pub fn set_vni(&mut self, vni: u32)

Sets the Virtual Network Identifier (VNI) (24 bits).

vni should be a 24-bit value. Higher bits are masked. The value is stored in network byte order.

Trait Implementations

impl Clone for GeneveHdr

fn clone(&self) -> GeneveHdr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GeneveHdr

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

Formats the value using the given formatter.

impl Default for GeneveHdr

fn default() -> GeneveHdr

Returns the “default value” for a type.

impl Copy for GeneveHdr