Struct toluol::DnsHeader

pub struct DnsHeader { /* fields omitted */ }

Represents a DNS header. rcode is an Option<DnsRcode> because valid DNS queries do not have a RCODE. See here for a list of available flags and their respective defining RFCs. The general format of a header is defined in RFC 1035.

Implementations

impl DnsHeader

pub fn new_response_header(
    msg_id: u16,
    opcode: DnsOpcode,
    aa: bool,
    tc: bool,
    rd: bool,
    ra: bool,
    ad: bool,
    cd: bool,
    rcode: DnsRcode,
    qdcount: u16,
    ancount: u16,
    nscount: u16,
    arcount: u16
) -> DnsHeader

Creates a header for a DNS response message. See RFC 1035 and here for information about the parameters.

pub fn new_query_header(
    msg_id: u16,
    opcode: DnsOpcode,
    tc: bool,
    rd: bool,
    ad: bool,
    cd: bool,
    edns: bool,
    qdcount: u16
) -> DnsHeader

Creates a header for a DNS query message. If the query includes an OPT record, edns must be true. See RFC 1035 and here for information about the other parameters.

pub fn encode(&self) -> Result<Vec<u8>>

Encodes a DnsHeader as a series of bytes. Returns an error if a method defined in byteorder::WriteBytesExt returns an error.

pub fn parse(header: &mut Cursor<&[u8]>) -> Result<DnsHeader>

Parses an encoded DnsHeader from a series of bytes. Returns an error if DnsOpcode::parse(), DnsRcode::parse() or a method defined in byteorder::ReadBytesExt return an error.

pub fn info_str(&self) -> String

Creates a string containing information (id, opcode, rcode if applicable, flags) about the header.

Trait Implementations

impl Display for DnsHeader

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

Formats the value using the given formatter.