Struct pcarp::block::NameResolution

pub struct NameResolution {
    pub record_values: Bytes,
}

Defines the mapping from numeric addresses present in the packet capture and the canonical name counterpart.

The Name Resolution Block (NRB) is used to support the correlation of numeric addresses (present in the captured packets) and their corresponding canonical names and it is optional. Having the literal names saved in the file prevents the need for performing name resolution at a later time, when the association between names and addresses may be different from the one in use at capture time. Moreover, the NRB avoids the need for issuing a lot of DNS requests every time the trace capture is opened, and also provides name resolution when reading the capture with a machine not connected to the network.

A Name Resolution Block is often placed at the beginning of the file, but no assumptions can be taken about its position. Multiple NRBs can exist in a pcapng file, either due to memory constraints or because additional name resolutions were performed by file processing tools, like network analyzers.

A Name Resolution Block need not contain any Records, except the nrb_record_end Record which MUST be the last Record. The addresses and names in NRB Records MAY be repeated multiple times; i.e., the same IP address may resolve to multiple names, the same name may resolve to the multiple IP addresses, and even the same address-to-name pair may appear multiple times, in the same NRB or across NRBs.

This documentation is copyright (c) 2018 IETF Trust and the persons identified as the authors of this document. All rights reserved. Please see the linked document for the full copyright notice.

Fields

record_values: Bytes

Zero or more Name Resolution Records (in the TLV format), each of which contains an association between a network address and a name. An nrb_record_end MUST be added after the last Record, and MUST exist even if there are no other Records in the NRB.

Trait Implementations

impl Clone for NameResolution

fn clone(&self) -> NameResolution

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NameResolution

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

Formats the value using the given formatter.

impl From<NameResolution> for Block

fn from(x: NameResolution) -> Self

Converts to this type from the input type.

impl PartialEq<NameResolution> for NameResolution

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for NameResolution

impl StructuralEq for NameResolution

impl StructuralPartialEq for NameResolution