[−][src]Trait packet_crafter::headers::Header

pub trait Header {
    fn make(self) -> PacketData;
    fn parse(raw_data: &[u8]) -> Result<Box<Self>, ParseError>;
    fn get_proto(&self) -> Protocol;
    fn get_length(&self) -> u8;
    fn get_min_length() -> u8;

    fn into_transport_header(&mut self) -> Option<&mut dyn TransportHeader> { ... }
}

Required methods

`fn make(self) -> PacketData`

'cook' the header, returning it as a Vec<u8>. this function will calculate checksums, even though they will be over-written by the OS if the packet is sent 'down the wire', likewise with a lot of length fields and such.

The reason i decided to still calculate checksums is incase someone uses the packet for some other purpose, or if they are building/using an experimntal OS which doesn calculate checksums (or they havent built that in yet).

`fn parse(raw_data: &[u8]) -> Result<Box<Self>, ParseError>`

parse() should never be run from a box

, is hould only ever br un as

::parse(). this is just here to complete the implementation of Header onto boxed structs that implement header

`fn get_proto(&self) -> Protocol`

`fn get_length(&self) -> u8`

get the current length of the header in bytes. this usually just returns a fixed value as most headers dont have variable length, only really IP does and even then its rare for it to be > 20 bytes

`fn get_min_length() -> u8`

get the minimum length (in bytes) that this type of header can be

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Provided methods

`fn into_transport_header(&mut self) -> Option<&mut dyn TransportHeader>`

attempts to coerce the header (a type which implements the Header trait) into a &mut dyn TransportHeader. Only returns Option::Some when the underlying concrete type is a UdpHeader or a TcpHeader

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