feat(iroh-base, iroh-net-report)!: intro net-report as a crate (#2921)

## Description

Introduces net-report as its own crate. For this, introduces a new
feature flag `relay` in `iroh-base` for the relay topology types.

- in `iroh-base`, the `RelayUrl` is moved to its own file. It can still
be used as before, this is not a breaking change.
- `RelayMap`, `RelayNode` are moved to `iroh-base` under the `relay`
feature flag.
- `RelayMode` is moved to `endpoint`. See the NOTES section about this.
- net-report now has metrics as a feature flag. I'm not sure how is that
this was not feature flagged before but still worked.
- ping is moved without changes from `iroh-net` to `iroh-net-report`.
This is the only place where it's used so it should have probably been
part of `netcheck` as a module from the beginig.
- Adds missing license files


## Breaking Changes

- `iroh-net`'s `NetcheckMetrics` are now called `NetReportMetrics`

## Notes & open questions

- `RelayMode` remains in `iroh-net` instead of moving to `iroh-base`
with other relay related because this is coupled with the staging and
prod configuration of relay urls. Since this is more configuration than
concept I think it's best to keep it in iroh-net.
- The crate is called `iroh-net-report` because -at least currently- it
depends on relay concepts. For example, the tests depend heavily on the
internal order of the `RelayMap`. Can we change this? yes. Should we
change this? we can discuss it. Is this PR the place for any of that?
No.
- The api needs some love. Some types that are supposed to be internal
are used by dependents (in this case `iroh-net`) It's not terrible but
it could be improved.

## Change checklist

- [x] Self-review.
- [x] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.
- [ ] ~Tests if relevant.~
- [ ] ~All breaking changes documented.~

.github/workflows/ci.yml

@@ -190,7 +190,7 @@ jobs:
         # uses: obi1kenobi/cargo-semver-checks-action@v2
         uses: n0-computer/cargo-semver-checks-action@feat-baseline
         with:
-          package: iroh, iroh-base, iroh-cli, iroh-dns-server, iroh-metrics, iroh-net, iroh-net-bench, iroh-node-util, iroh-router, netwatch, portmapper, iroh-relay
+          package: iroh, iroh-base, iroh-cli, iroh-dns-server, iroh-metrics, iroh-net, iroh-net-bench, iroh-node-util, iroh-router, netwatch, portmapper, iroh-relay, iroh-net-report
           baseline-rev: ${{ env.HEAD_COMMIT_SHA }}
           use-cache: false
 

.github/workflows/tests.yaml

@@ -23,7 +23,7 @@ env:
   RUSTFLAGS: -Dwarnings
   RUSTDOCFLAGS: -Dwarnings
   SCCACHE_CACHE_SIZE: "50G"
-  CRATES_LIST: "iroh,iroh-node-util,iroh-metrics,iroh-net,iroh-net-bench,iroh-test,iroh-cli,iroh-dns-server,iroh-router,netwatch,portmapper,iroh-relay"
+  CRATES_LIST: "iroh,iroh-node-util,iroh-metrics,iroh-net,iroh-net-bench,iroh-test,iroh-cli,iroh-dns-server,iroh-router,netwatch,portmapper,iroh-relay,iroh-net-report"
   IROH_FORCE_STAGING_RELAYS: "1"
 
 jobs:

Cargo.toml

@@ -12,6 +12,7 @@ members = [
   "iroh-router",
   "net-tools/netwatch",
   "net-tools/portmapper",
+  "iroh-net-report",
   "iroh-node-util",
 ]
 resolver = "2"

iroh-base/Cargo.toml

@@ -47,12 +47,13 @@ serde_json = "1.0.107"
 serde_test = "1.0.176"
 
 [features]
-default = ["hash", "base32"]
+default = ["hash", "base32", "relay"]
 hash = ["dep:blake3", "dep:data-encoding", "dep:postcard", "dep:derive_more", "base32"]
 base32 = ["dep:data-encoding", "dep:postcard"]
 redb = ["dep:redb"]
 key = ["dep:ed25519-dalek", "dep:once_cell", "dep:rand", "dep:rand_core", "dep:ssh-key", "dep:ttl_cache", "dep:aead", "dep:crypto_box", "dep:zeroize", "dep:url", "dep:derive_more", "dep:getrandom"]
 wasm = ["getrandom?/js"]
+relay = ["dep:url", "dep:derive_more"]
 
 [package.metadata.docs.rs]
 all-features = true

iroh-base/src/lib.rs

@@ -13,6 +13,11 @@ pub mod key;
 #[cfg(feature = "key")]
 #[cfg_attr(iroh_docsrs, doc(cfg(feature = "key")))]
 pub mod node_addr;
+#[cfg(feature = "relay")]
+#[cfg_attr(iroh_docsrs, doc(cfg(feature = "relay")))]
+pub mod relay_map;
+#[cfg(any(feature = "relay", feature = "key"))]
+mod relay_url;
 #[cfg(feature = "base32")]
 #[cfg_attr(iroh_docsrs, doc(cfg(feature = "base32")))]
 pub mod ticket;

iroh-base/src/node_addr.rs

@@ -6,13 +6,12 @@
 //!
 //! The primary way of addressing a node is by using the [`NodeAddr`].
 
-use std::{collections::BTreeSet, fmt, net::SocketAddr, ops::Deref, str::FromStr};
+use std::{collections::BTreeSet, net::SocketAddr};
 
-use anyhow::Context;
 use serde::{Deserialize, Serialize};
-use url::Url;
 
 use crate::key::{NodeId, PublicKey};
+pub use crate::relay_url::RelayUrl;
 
 /// Network-level addressing information for an iroh-net node.
 ///
@@ -199,120 +198,3 @@ pub enum AddrInfoOptions {
     /// Includes the Node ID and the direct addresses.
     Addresses,
 }
-
-/// A URL identifying a relay server.
-///
-/// This is but a wrapper around [`Url`], with a few custom tweaks:
-///
-/// - A relay URL is never a relative URL, so an implicit `.` is added at the end of the
-///   domain name if missing.
-///
-/// - [`fmt::Debug`] is implemented so it prints the URL rather than the URL struct fields.
-///   Useful when logging e.g. `Option<RelayUrl>`.
-///
-/// To create a [`RelayUrl`] use the `From<Url>` implementation.
-#[derive(
-    Clone, derive_more::Display, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize,
-)]
-pub struct RelayUrl(Url);
-
-impl From<Url> for RelayUrl {
-    fn from(mut url: Url) -> Self {
-        if let Some(domain) = url.domain() {
-            if !domain.ends_with('.') {
-                let domain = String::from(domain) + ".";
-
-                // This can fail, though it is unlikely the resulting URL is usable as a
-                // relay URL, probably it has the wrong scheme or is not a base URL or the
-                // like.  We don't do full URL validation however, so just silently leave
-                // this bad URL in place.  Something will fail later.
-                url.set_host(Some(&domain)).ok();
-            }
-        }
-        Self(url)
-    }
-}
-
-/// Support for parsing strings directly.
-///
-/// If you need more control over the error first create a [`Url`] and use [`RelayUrl::from`]
-/// instead.
-impl FromStr for RelayUrl {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let inner = Url::from_str(s).context("invalid URL")?;
-        Ok(RelayUrl::from(inner))
-    }
-}
-
-impl From<RelayUrl> for Url {
-    fn from(value: RelayUrl) -> Self {
-        value.0
-    }
-}
-
-/// Dereferences to the wrapped [`Url`].
-///
-/// Note that [`DerefMut`] is not implemented on purpose, so this type has more flexibility
-/// to change the inner later.
-///
-/// [`DerefMut`]: std::ops::DerefMut
-impl Deref for RelayUrl {
-    type Target = Url;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl fmt::Debug for RelayUrl {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_tuple("RelayUrl")
-            .field(&DbgStr(self.0.as_str()))
-            .finish()
-    }
-}
-
-/// Helper struct to format a &str without allocating a String.
-///
-/// Maybe this is entirely unneeded and the compiler would be smart enough to never allocate
-/// the String anyway.  Who knows.  Writing this was faster than checking the assembler
-/// output.
-struct DbgStr<'a>(&'a str);
-
-impl<'a> fmt::Debug for DbgStr<'a> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, r#""{}""#, self.0)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_relay_url_debug_display() {
-        let url = RelayUrl::from(Url::parse("https://example.com").unwrap());
-
-        assert_eq!(format!("{url:?}"), r#"RelayUrl("https://example.com./")"#);
-
-        assert_eq!(format!("{url}"), "https://example.com./");
-    }
-
-    #[test]
-    fn test_relay_url_absolute() {
-        let url = RelayUrl::from(Url::parse("https://example.com").unwrap());
-
-        assert_eq!(url.domain(), Some("example.com."));
-
-        let url1 = RelayUrl::from(Url::parse("https://example.com.").unwrap());
-        assert_eq!(url, url1);
-
-        let url2 = RelayUrl::from(Url::parse("https://example.com./").unwrap());
-        assert_eq!(url, url2);
-
-        let url3 = RelayUrl::from(Url::parse("https://example.com/").unwrap());
-        assert_eq!(url, url3);
-    }
-}

iroh-net/src/relay_map.rs → iroh-base/src/relay_map.rs

@@ -3,39 +3,14 @@
 use std::{collections::BTreeMap, fmt, sync::Arc};
 
 use anyhow::{ensure, Result};
-pub use iroh_relay::RelayUrl;
 use serde::{Deserialize, Serialize};
 
-use crate::defaults::DEFAULT_STUN_PORT;
+pub use crate::relay_url::RelayUrl;
 
-/// Configuration of the relay servers for an [`Endpoint`].
+/// The default STUN port used by the Relay server.
 ///
-/// [`Endpoint`]: crate::endpoint::Endpoint
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum RelayMode {
-    /// Disable relay servers completely.
-    Disabled,
-    /// Use the default relay map, with production relay servers from n0.
-    ///
-    /// See [`crate::defaults::prod`] for the severs used.
-    Default,
-    /// Use the staging relay servers from n0.
-    Staging,
-    /// Use a custom relay map.
-    Custom(RelayMap),
-}
-
-impl RelayMode {
-    /// Returns the relay map for this mode.
-    pub fn relay_map(&self) -> RelayMap {
-        match self {
-            RelayMode::Disabled => RelayMap::empty(),
-            RelayMode::Default => crate::defaults::prod::default_relay_map(),
-            RelayMode::Staging => crate::defaults::staging::default_relay_map(),
-            RelayMode::Custom(relay_map) => relay_map.clone(),
-        }
-    }
-}
+/// The STUN port as defined by [RFC 8489](<https://www.rfc-editor.org/rfc/rfc8489#section-18.6>)
+const DEFAULT_STUN_PORT: u16 = 3478;
 
 /// Configuration of all the relay servers that can be used.
 #[derive(Debug, Clone, PartialEq, Eq)]