Struct Builder

pub struct Builder { /* private fields */ }

Allows to build a DNS packet

Both query and answer packets may be built with this interface, although, much of functionality is not implemented yet.

Implementations

impl Builder

pub fn new_query(id: u16, recursion: bool) -> Builder

Creates a new query

Initially all sections are empty. You’re expected to fill the questions section with add_question

pub fn add_question( &mut self, qname: &str, prefer_unicast: bool, qtype: QueryType, qclass: QueryClass, ) -> &mut Builder

Adds a question to the packet

Panics

• Answers, nameservers or additional section has already been written
• There are already 65535 questions in the buffer.
• When name is invalid

pub fn build(self) -> Result<Vec<u8>, Vec<u8>>

Returns the final packet

When packet is not truncated method returns Ok(packet). If packet is truncated the method returns Err(packet). In both cases the packet is fully valid.

In the server implementation you may use x.build().unwrap_or_else(|x| x).

In the client implementation it’s probably unwise to send truncated packet, as it doesn’t make sense. Even panicking may be more appropriate.

Trait Implementations

impl Debug for Builder

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

Formats the value using the given formatter.