feat!: introduce iroh-router crate (#2832)

The general goal is to have a single place to deal with custom
protocols.

## Breaking Changes

- moved
  - `iroh::node::ProtocolHandler` -> `iroh::router::ProtocolHandler`

---------

Co-authored-by: Floris Bruynooghe <flub@n0.computer>

Author: dignifiedquire

Cargo.lock

@@ -8,6 +8,7 @@ members = [
   "iroh-test",
   "iroh-net/bench",
   "iroh-cli",
+  "iroh-router",
 ]
 resolver = "2"
 
@@ -49,3 +50,4 @@ iroh-base = { path = "./iroh-base" }
 iroh-net = { path = "./iroh-net" }
 iroh-metrics = { path = "./iroh-metrics" }
 iroh-test = { path = "./iroh-test" }
+iroh-router = { path = "./iroh-router" }

Cargo.toml

@@ -0,0 +1,37 @@
+[package]
+name = "iroh-router"
+version = "0.27.0"
+edition = "2021"
+readme = "README.md"
+description = "protocol router support for iroh"
+license = "MIT OR Apache-2.0"
+authors = ["dignifiedquire <me@dignifiedquire.com>", "n0 team"]
+repository = "https://github.com/n0-computer/iroh"
+keywords = ["quic", "networking", "holepunching", "p2p"]
+
+
+[dependencies]
+anyhow = "1.0.91"
+futures-buffered = "0.2.9"
+futures-lite = "2.3.0"
+futures-util = "0.3.31"
+iroh-net = { version = "0.27.0", path = "../iroh-net" }
+tokio = "1.41.0"
+tokio-util = "0.7.12"
+tracing = "0.1.40"
+
+# Examples
+clap = { version = "4", features = ["derive"], optional = true }
+tracing-subscriber = { version = "0.3", features = ["env-filter"], optional = true }
+
+[lints]
+workspace = true
+
+
+[features]
+default = []
+examples = ["dep:clap", "dep:tracing-subscriber"]
+
+[[example]]
+name = "custom-protocol"
+required-features = ["examples"]

iroh-router/Cargo.toml

@@ -0,0 +1,20 @@
+# iroh-router
+
+This crate contains the definitions for custom protocols for `iroh`.
+
+# License
+
+This project is licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in this project by you, as defined in the Apache-2.0 license,
+shall be dual licensed as above, without any additional terms or conditions.