initial version

.github/workflows/rust.yml

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+name: Rust
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@master
+    - name: Checkout submodules
+      uses: srt32/[email protected]
+      with:
+        args: git submodule update --init --recursive
+    - name: Set up Clang
+      uses: egor-tensin/setup-clang@v1
+      with:
+        version: latest
+        platform: x64
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: cargo test --verbose

.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk

.gitmodules

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+[submodule "kcp"]
+	path = kcp
+	url = https://github.com/skywind3000/kcp

Cargo.toml

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+[package]
+name = "kcp-sys"
+version = "0.1.0"
+edition = "2021"
+authors = ["[email protected]"]
+description = "Safe bindings for KCP transport protocol"
+repository = "https://github.com/EasyTier/kcp-sys"
+readme = "README.md"
+license = "MIT"
+keywords = ["kcp", "bindings"]
+
+[dependencies]
+
+[build-dependencies]
+bindgen = "0.71.1"
+cc = "1.2.7"

LICENSE

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+MIT License
+
+Copyright (c) 2022 b23r0
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# kcp-sys
+
+Safe bindings to the [kcp](https://github.com/skywind3000/kcp) transport protocol library.

build.rs

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+use std::env;
+use std::path::{Path, PathBuf};
+
+fn main() {
+    println!("cargo:rustc-link-lib=kcp");
+    let dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let fulldir = Path::new(&dir).join("kcp");
+
+    let mut config = cc::Build::new();
+    config.include(fulldir.clone());
+    config.file(fulldir.join("ikcp.c"));
+    config.opt_level(3);
+    config.warnings(false);
+    config.compile("libkcp.a");
+    println!("cargo:rustc-link-search=native={}", fulldir.display());
+
+    println!("cargo:rerun-if-changed=kcp/ikcp.h");
+    println!("cargo:rerun-if-changed=kcp/ikcp.c");
+    println!("cargo:rerun-if-changed=wrapper.h");
+
+    let bindings = bindgen::Builder::default()
+        .header("wrapper.h")
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
+        .allowlist_function("ikcp_.*")
+        .opaque_type("ikcpcb")
+        .generate()
+        .expect("Unable to generate bindings");
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}

src/lib.rs

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+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));

wrapper.h

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+#include "kcp/ikcp.h"