Struct trust_dns_proto::rr::Name

source ·
pub struct Name { /* private fields */ }
Expand description

Them should be through references. As a workaround the Strings are all Rc as well as the array

Implementations

Create a new domain::Name, i.e. label

Returns the root label, i.e. no labels, can probably make this better in the future.

Returns true if there are no labels, i.e. it’s empty.

In DNS the root is represented by .

Examples
use trust_dns_proto::rr::domain::Name;

let root = Name::root();
assert_eq!(&root.to_string(), ".");

Returns true if the name is a fully qualified domain name.

If this is true, it has effects like only querying for this single name, as opposed to building up a search list in resolvers.

warning: this interface is unstable and may change in the future

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let name = Name::from_str("www").unwrap();
assert!(!name.is_fqdn());

let name = Name::from_str("www.example.com").unwrap();
assert!(!name.is_fqdn());

let name = Name::from_str("www.example.com.").unwrap();
assert!(name.is_fqdn());

Specifies this name is a fully qualified domain name

warning: this interface is unstable and may change in the future

Returns an iterator over the labels

Appends the label to the end of this name

Example
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let name = Name::from_str("www.example").unwrap();
let name = name.append_label("com").unwrap();
assert_eq!(name, Name::from_str("www.example.com").unwrap());

Creates a new Name from the specified labels

Arguments
  • labels - vector of items which will be stored as Strings.
Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

// From strings, uses utf8 conversion
let from_labels = Name::from_labels(vec!["www", "example", "com"]).unwrap();
assert_eq!(from_labels, Name::from_str("www.example.com").unwrap());

// Force a set of bytes into labels (this is none-standard and potentially dangerous)
let from_labels = Name::from_labels(vec!["bad chars".as_bytes(), "example".as_bytes(), "com".as_bytes()]).unwrap();
assert_eq!(from_labels[0].as_bytes(), "bad chars".as_bytes());

let root = Name::from_labels(Vec::<&str>::new()).unwrap();
assert!(root.is_root());

Appends other to self, returning a new Name

Carries forward is_fqdn from other.

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let local = Name::from_str("www").unwrap();
let domain = Name::from_str("example.com").unwrap();
assert!(!domain.is_fqdn());

let name = local.clone().append_name(&domain);
assert_eq!(name, Name::from_str("www.example.com").unwrap());
assert!(!name.is_fqdn());

// see also `Name::append_domain`
let domain = Name::from_str("example.com.").unwrap();
assert!(domain.is_fqdn());
let name = local.append_name(&domain);
assert_eq!(name, Name::from_str("www.example.com.").unwrap());
assert!(name.is_fqdn());

Appends the domain to self, making the new Name an FQDN

This is an alias for append_name with the added effect of marking the new Name as a fully-qualified-domain-name.

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let local = Name::from_str("www").unwrap();
let domain = Name::from_str("example.com").unwrap();
let name = local.append_domain(&domain);
assert_eq!(name, Name::from_str("www.example.com").unwrap());
assert!(name.is_fqdn())

Creates a new Name with all labels lowercased

Examples
use std::cmp::Ordering;
use std::str::FromStr;

use trust_dns_proto::rr::domain::{Label, Name};

let example_com = Name::from_ascii("Example.Com").unwrap();
assert_eq!(example_com.cmp_case(&Name::from_str("example.com").unwrap()), Ordering::Less);
assert!(example_com.to_lowercase().eq_case(&Name::from_str("example.com").unwrap()));

Trims off the first part of the name, to help with searching for the domain piece

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let example_com = Name::from_str("example.com.").unwrap();
assert_eq!(example_com.base_name(), Name::from_str("com.").unwrap());
assert_eq!(Name::from_str("com.").unwrap().base_name(), Name::root());
assert_eq!(Name::root().base_name(), Name::root());

Trims to the number of labels specified

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let example_com = Name::from_str("example.com.").unwrap();
assert_eq!(example_com.trim_to(2), Name::from_str("example.com.").unwrap());
assert_eq!(example_com.trim_to(1), Name::from_str("com.").unwrap());
assert_eq!(example_com.trim_to(0), Name::root());
assert_eq!(example_com.trim_to(3), Name::from_str("example.com.").unwrap());

same as zone_of allows for case sensitive call

returns true if the name components of self are all present at the end of name

Example
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let name = Name::from_str("www.example.com").unwrap();
let name = Name::from_str("www.example.com").unwrap();
let zone = Name::from_str("example.com").unwrap();
let another = Name::from_str("example.net").unwrap();
assert!(zone.zone_of(&name));
assert!(!name.zone_of(&zone));
assert!(!another.zone_of(&name));

Returns the number of labels in the name, discounting *.

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let root = Name::root();
assert_eq!(root.num_labels(), 0);

let example_com = Name::from_str("example.com").unwrap();
assert_eq!(example_com.num_labels(), 2);

let star_example_com = Name::from_str("*.example.com.").unwrap();
assert_eq!(star_example_com.num_labels(), 2);

returns the length in bytes of the labels. ‘.’ counts as 1

This can be used as an estimate, when serializing labels, they will often be compressed and/or escaped causing the exact length to be different.

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

assert_eq!(Name::from_str("www.example.com.").unwrap().len(), 16);
assert_eq!(Name::from_str(".").unwrap().len(), 1);
assert_eq!(Name::root().len(), 1);

Returns whether the length of the labels, in bytes is 0. In practive, since ‘.’ counts as 1, this is never the case so the method returns false.

attempts to parse a name such as "example.com." or "subdomain.example.com."

Examples
use std::str::FromStr;
use trust_dns_proto::rr::domain::Name;

let name = Name::from_str("example.com.").unwrap();
assert_eq!(name.base_name(), Name::from_str("com.").unwrap());
assert_eq!(name[0].to_string(), "example");

Will convert the string to a name only allowing ascii as valid input

This method will also preserve the case of the name where that’s desirable

Examples
use trust_dns_proto::rr::Name;

let bytes_name = Name::from_labels(vec!["WWW".as_bytes(), "example".as_bytes(), "COM".as_bytes()]).unwrap();
let ascii_name = Name::from_ascii("WWW.example.COM.").unwrap();
let lower_name = Name::from_ascii("www.example.com.").unwrap();

assert!(bytes_name.eq_case(&ascii_name));
assert!(!lower_name.eq_case(&ascii_name));

// escaped values
let bytes_name = Name::from_labels(vec!["email.name".as_bytes(), "example".as_bytes(), "com".as_bytes()]).unwrap();
let name = Name::from_ascii("email\\.name.example.com.").unwrap();

assert_eq!(bytes_name, name);

let bytes_name = Name::from_labels(vec!["bad.char".as_bytes(), "example".as_bytes(), "com".as_bytes()]).unwrap();
let name = Name::from_ascii("bad\\056char.example.com.").unwrap();

assert_eq!(bytes_name, name);

Emits the canonical version of the name to the encoder.

In canonical form, there will be no pointers written to the encoder (i.e. no compression).

Writes the labels, as lower case, to the encoder

Arguments
  • encoder - encoder for writing this name
  • lowercase - if true the name will be lowercased, otherwise it will not be changed when writing

Case sensitive comparison

Compares the Names, in a case sensitive manner

Converts this name into an ascii safe string.

If the name is an IDNA name, then the name labels will be returned with the xn-- prefix. see to_utf8 or the Display impl for methods which convert labels to utf8.

Converts the Name labels to the utf8 String form.

This converts the name to an unescaped format, that could be used with parse. If, the name is is followed by the final ., e.g. as in www.example.com., which represents a fully qualified Name.

Returns true if the Name is either localhost or in the localhost zone.

Example
use std::str::FromStr;
use trust_dns_proto::rr::Name;

let name = Name::from_str("localhost").unwrap();
assert!(name.is_localhost());

let name = Name::from_str("localhost.").unwrap();
assert!(name.is_localhost());

let name = Name::from_str("my.localhost.").unwrap();
assert!(name.is_localhost());

Trait Implementations

parses the chain of labels this has a max of 255 octets, with each label being less than 63. all names will be stored lowercase internally. This will consume the portions of the Vec which it is reading…

Returns the object in binary form
Write the type to the stream
Returns the object in binary form
Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more
Formats the value using the given formatter. Read more
Converts to this type from the input type.
Converts to this type from the input type.
Converts to this type from the input type.

Uses the Name::from_utf8 conversion on this string, see [from_ascii] for ascii only, or for preserving case

The associated error which can be returned from parsing.
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
The returned type after indexing.
Performs the indexing (container[index]) operation. Read more
The type of the elements being iterated over.
Which kind of iterator are we turning this into?
Creates an iterator from a value. Read more

Clones this into a new Name

Convert this into Name

Case insensitive comparison, see Name::cmp_case for case sensitive comparisons

RFC 4034 DNSSEC Resource Records March 2005

6.1.  Canonical DNS Name Order

 For the purposes of DNS security, owner names are ordered by treating
 individual labels as unsigned left-justified octet strings.  The
 absence of a octet sorts before a zero value octet, and uppercase
 US-ASCII letters are treated as if they were lowercase US-ASCII
 letters.

 To compute the canonical ordering of a set of DNS names, start by
 sorting the names according to their most significant (rightmost)
 labels.  For names in which the most significant label is identical,
 continue sorting according to their next most significant label, and
 so forth.

 For example, the following names are sorted in canonical DNS name
 order.  The most significant label is "example".  At this level,
 "example" sorts first, followed by names ending in "a.example", then
 by names ending "z.example".  The names within each level are sorted
 in the same way.

           example
           a.example
           yljkjljk.a.example
           Z.a.example
           zABC.a.EXAMPLE
           z.example
           \001.z.example
           *.z.example
           \200.z.example
Compares and returns the maximum of two values. Read more
Compares and returns the minimum of two values. Read more
Restrict a value to a certain interval. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Always returns none for Name, it assumes something that is already a name, wants to be a name

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.