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|
//! List of directories that ships with Tor, for initial directory
//! operations.
//!
//! When a client doesn't have directory information yet, it uses a
//! "Fallback Directory" to retrieve its initial information about the
//! network.
//!
//! # Semver note
//!
//! The types in this module are re-exported from `arti-client` and
//! `tor-dirmgr`: any changes here must be reflected there.
use derive_builder::Builder;
use tor_config::ConfigBuildError;
use tor_llcrypto::pk::ed25519::Ed25519Identity;
use tor_llcrypto::pk::rsa::RsaIdentity;
use serde::Deserialize;
use std::net::SocketAddr;
/// A directory whose location ships with Tor (or arti), and which we
/// can use for bootstrapping when we don't know anything else about
/// the network.
//
// Note that we do *not* set serde(deny_unknown_fields) on this
// structure: we want our fallback directory configuration format to
// be future-proof against adding new info about each fallback.
#[derive(Debug, Clone, Deserialize, Builder, Eq, PartialEq)]
#[builder(build_fn(validate = "FallbackDirBuilder::validate", error = "ConfigBuildError"))]
pub struct FallbackDir {
/// RSA identity for the directory relay
rsa_identity: RsaIdentity,
/// Ed25519 identity for the directory relay
ed_identity: Ed25519Identity,
/// List of ORPorts for the directory relay
orports: Vec<SocketAddr>,
}
impl FallbackDir {
/// Return a builder that can be used to make a `FallbackDir`.
pub fn builder() -> FallbackDirBuilder {
FallbackDirBuilder::default()
}
}
impl FallbackDirBuilder {
/// Make a new FallbackDirBuilder.
///
/// You only need to use this if you're using a non-default set of
/// fallback directories.
pub fn new() -> Self {
Self::default()
}
/// Add a single OR port for this fallback directory.
///
/// This field is required, and may be called more than once.
pub fn orport(&mut self, orport: SocketAddr) -> &mut Self {
self.orports.get_or_insert_with(Vec::new).push(orport);
self
}
/// Check whether this builder is ready to make a FallbackDir.
fn validate(&self) -> std::result::Result<(), ConfigBuildError> {
if let Some(orports) = &self.orports {
if orports.is_empty() {
return Err(ConfigBuildError::Invalid {
field: "orport".to_string(),
problem: "list was empty".to_string(),
});
}
}
Ok(())
}
}
impl tor_linkspec::ChanTarget for FallbackDir {
fn addrs(&self) -> &[SocketAddr] {
&self.orports[..]
}
fn ed_identity(&self) -> &Ed25519Identity {
&self.ed_identity
}
fn rsa_identity(&self) -> &RsaIdentity {
&self.rsa_identity
}
}
|
