Struct tor_protover::Protocols

pub struct Protocols { /* fields omitted */ }

A set of supported or required subprotocol versions.

This type supports both recognized subprotocols (listed in ProtoKind), and unrecognized subprotocols (stored by name).

To construct an instance, use the FromStr trait:

use tor_protover::Protocols;
let p: Result<Protocols,_> = "Link=1-3 LinkAuth=2-3 Relay=1-2".parse();

Implementations

impl Protocols

pub fn new() -> Self

Return a new empty set of protocol versions.

pub fn supports_known_subver(&self, proto: ProtoKind, ver: u8) -> bool

Check whether a known protocol version is supported.

use tor_protover::*;
let protos: Protocols = "Link=1-3 HSDir=2,4-5".parse().unwrap();

assert!(protos.supports_known_subver(ProtoKind::Link, 2));
assert!(protos.supports_known_subver(ProtoKind::HSDir, 4));
assert!(! protos.supports_known_subver(ProtoKind::HSDir, 3));
assert!(! protos.supports_known_subver(ProtoKind::LinkAuth, 3));

pub fn supports_subver(&self, proto: &str, ver: u8) -> bool

Check whether a protocol version identified by a string is supported.

use tor_protover::*;
let protos: Protocols = "Link=1-3 Foobar=7".parse().unwrap();

assert!(protos.supports_subver("Link", 2));
assert!(protos.supports_subver("Foobar", 7));
assert!(! protos.supports_subver("Link", 5));
assert!(! protos.supports_subver("Foobar", 6));
assert!(! protos.supports_subver("Wombat", 3));

Trait Implementations

impl Clone for Protocols

fn clone(&self) -> Protocols

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Protocols

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

Formats the value using the given formatter.

impl Default for Protocols

fn default() -> Self

Returns the “default value” for a type.

impl Display for Protocols

The Display trait formats a protocol set in the format expected by Tor consensus documents.

use tor_protover::*;
let protos: Protocols = "Link=1,2,3 Foobar=7 Relay=2".parse().unwrap();
assert_eq!(format!("{}", protos),
           "Foobar=7 Link=1-3 Relay=2");

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

Formats the value using the given formatter.

impl FromStr for Protocols

A Protocols set can be parsed from a string according to the format used in Tor consensus documents.

A protocols set is represented by a space-separated list of entries. Each entry is of the form Name=Versions, where Name is the name of a protocol, and Versions is a comma-separated list of version numbers and version ranges. Each version range is a pair of integers separated by -.

No protocol name may be listed twice. No version may be listed twice for a single protocol. All versions must be in range 0 through 63 inclusive.

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, ParseError>

Parses a string s to return a value of this type.