Add Rust bindings (alpha)

CMakeLists.txt

@@ -124,6 +124,16 @@ if (ZTS_ENABLE_PINVOKE)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DZTS_ENABLE_PINVOKE=1")
 endif()
 
+# Rust language bindings
+if (ZTS_ENABLE_RUST)
+    # Features
+    set(BUILD_STATIC_LIB        TRUE)
+    set(BUILD_SHARED_LIB       FALSE)
+    set(BUILD_EXAMPLES         FALSE)
+    set(ALLOW_INSTALL_TARGET   FALSE)
+    set(BUILD_HOST_SELFTEST    FALSE)
+endif()
+
 # Python language bindings (_libzt.so)
 if (ZTS_ENABLE_PYTHON)
     # Features

build.sh

@@ -368,6 +368,22 @@ host-uninstall()
     cd -
 }
 
+# Build rust crate, libzt.a, link and test
+#
+host-rust()
+{
+    BUILD_TYPE=${1:-debug}
+
+    cd pkg/crate/libzt
+    cargo build # --verbose
+
+    # Test Rust crate
+    if [[ $2 = *"test"* ]]; then
+        cargo run --example libzt-test-app -- server $alice_path $testnet 0.0.0.0 $port4 &
+        cargo run --example libzt-test-app -- client $bob_path $testnet $alice_ip4 $port4 &
+    fi
+}
+
 # Build C extension module (*.so), python module, package both into wheel
 #
 # ./build.sh host-python-wheel "release"
@@ -467,7 +483,7 @@ host-pinvoke()
         cp $LIB_OUTPUT_DIR/* $BIN_OUTPUT_DIR
         # Start Alice as server
         MONO_THREADS_SUSPEND=preemptive; mono --debug "$BIN_OUTPUT_DIR/selftest.exe" server $alice_path $testnet $port4 &
-        sleep 5
+        sleep 3
         # Start Bob as client
         MONO_THREADS_SUSPEND=preemptive; mono --debug "$BIN_OUTPUT_DIR/selftest.exe" client $bob_path $testnet $alice_ip4 $port4 &
     fi
@@ -663,6 +679,7 @@ format-code()
         then
             $PYTHON -m black src/bindings/python/libzt.py
             $PYTHON -m black src/bindings/python/node.py
+            $PYTHON -m black src/bindings/python/select.py
             $PYTHON -m black src/bindings/python/sockets.py
             $PYTHON -m black examples/python/
             $PYTHON -m black test/selftest.py
@@ -692,6 +709,8 @@ test-c()
 # Recursive deep clean
 clean()
 {
+    # Clean rust crate
+    (cd pkg/crate/libzt && cargo clean)
     # Finished artifacts
     rm -rf $BUILD_OUTPUT_DIR
     # CMake's build system cache

examples/rust/README.md

@@ -0,0 +1,11 @@
+# Rust example
+
+```
+cargo install libzt
+```
+
+Examples: [pkg/crate/libzt/src/examples](pkg/crate/libzt/src/examples)
+
+## Links
+
+ - Getting Started: [docs.zerotier.com/sockets](https://docs.zerotier.com/sockets/tutorial.html)

pkg/crate/libzt/Cargo.lock

@@ -58,6 +58,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
+[[package]]
+name = "cc"
+version = "1.0.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a72c244c1ff497a746a7e1fb3d14bd08420ecda70c8f25c7112f2781652d787"
+
 [[package]]
 name = "cexpr"
 version = "0.4.0"
@@ -99,6 +105,15 @@ dependencies = [
  "vec_map",
 ]
 
+[[package]]
+name = "cmake"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb6210b637171dfba4cda12e579ac6dc73f5165ad56133e5d72ef3131f320855"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "env_logger"
 version = "0.8.3"
@@ -147,9 +162,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.94"
+version = "0.2.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18794a8ad5b29321f790b55d93dfba91e125cb1a9edbd4f8e3150acc771c1a5e"
+checksum = "789da6d93f1b866ffe175afc5322a4d76c038605a1c3319bb57b06967ca98a36"
 
 [[package]]
 name = "libloading"
@@ -166,6 +181,7 @@ name = "libzt"
 version = "0.1.0"
 dependencies = [
  "bindgen",
+ "cmake",
  "libc",
 ]
 
@@ -202,9 +218,9 @@ checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.26"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a152013215dca273577e18d2bf00fa862b89b24169fb78c4c95aeb07992c9cec"
+checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
 dependencies = [
  "unicode-xid",
 ]
@@ -220,9 +236,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.5.3"
+version = "1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce5f1ceb7f74abbce32601642fcf8e8508a8a8991e0621c7d750295b9095702b"
+checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
 dependencies = [
  "aho-corasick",
  "memchr",

pkg/crate/libzt/Cargo.toml

@@ -16,12 +16,13 @@ categories = ["network-programming", "cryptography"]
 [build-dependencies]
 bindgen = "0.57"
 libc = "0.2"
+cmake = "0.1"
 
 [lib]
 name = "libzt"
 path = "src/lib.rs"
 
-[[bin]]
+[[example]]
 name = "libzt-test-app"
-path = "src/bin/libzt-test-app.rs"
+path = "src/examples/libzt-test-app.rs"
 

pkg/crate/libzt/README.md

@@ -1,10 +1,19 @@
-[libzt](https://www.zerotier.com)
-=====
-Part of the ZeroTier SDK
+# libzt - Sockets over ZeroTier
+
+`libzt` replicates the functionality of [std::net](https://doc.rust-lang.org/std/net/index.html) but uses [ZeroTier](https://www.zerotier.com) as its transport layer.
 
 Securely connect application instances, physical devices, and virtual devices as if everything is on a single LAN. ZeroTier brings your network into user-space. No root, and no host configuration requirements.
 
-We've paired our network hyper-visor core with a TCP/UDP/IP stack [(lwIP)](https://en.wikipedia.org/wiki/LwIP) to provide your application with an exclusive and private virtual network layer. All traffic is end-to-end encrypted between each peer and we provide an easy-to-use socket interface similar to [std::net](https://doc.rust-lang.org/std/net/index.html).
+## Usage
+
+Add the following to your `Cargo.toml`:
+
+```toml
+[dependencies]
+libzt = "0.1.0"
+```
+
+## Resources
 
  - Docs: [docs.zerotier.com](https://docs.zerotier.com/sockets/tutorial.html)
  - Repo: [github.com/zerotier/libzt](https://github.com/zerotier/libzt)

pkg/crate/libzt/build.rs

@@ -1,19 +1,36 @@
 extern crate bindgen;
 
-fn main() {
-    println!("cargo:rustc-link-lib=zt");
-    println!("cargo:rustc-env=LLVM_CONFIG_PATH=/usr/local/opt/llvm/bin/llvm-config");
+use cmake::Config;
+use std::env;
+use std::path::PathBuf;
 
-    //println!("cargo:rerun-if-changed=../../../include/ZeroTierSockets.h");
-    //println!("cargo:include=/usr/local/include");
+fn main() {
+    Config::new("src/native").build_target("zt-static").define("ZTS_ENABLE_RUST", "1").out_dir("target").build();
+
+    println!("cargo:rustc-link-search=target/build/lib");
+    println!("cargo:rustc-link-lib=static=zt");
+
+    // See here for reasoning: https://flames-of-code.netlify.app/blog/rust-and-cmake-cplusplus/
+
+    let target = env::var("TARGET").unwrap();
+    if target.contains("apple") {
+        println!("cargo:rustc-link-lib=dylib=c++");
+    } else if target.contains("linux") {
+        println!("cargo:rustc-link-lib=dylib=stdc++");
+    } else {
+        unimplemented!();
+    }
+
+    //println!("cargo:rustc-env=LLVM_CONFIG_PATH=/usr/local/opt/llvm/bin/llvm-config");
 
     let bindings = bindgen::Builder::default()
-        .header("../../../include/ZeroTierSockets.h")
+        .header("src/native/include/ZeroTierSockets.h")
         .parse_callbacks(Box::new(bindgen::CargoCallbacks))
         .generate()
         .expect("Unable to generate bindings");
 
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
     bindings
-        .write_to_file("./src/libzt.rs")
+        .write_to_file(out_path.join("libzt.rs"))
         .expect("Couldn't write bindings!");
 }

pkg/crate/libzt/src/examples/libzt-test-app.rs

@@ -0,0 +1,146 @@
+use libzt;
+
+use std::env;
+
+use libzt::tcp::{TcpListener, TcpStream};
+use std::io::{Read, Write};
+use std::net::Shutdown;
+use std::str::from_utf8;
+use std::thread;
+
+// (Optional) Notify application of ZeroTier events, some with context
+fn user_event_handler(event_code: i16) -> () {
+    println!("user_event {}", event_code);
+}
+
+fn handle_client(mut stream: TcpStream) {
+    let mut data = [0 as u8; 50]; // using 50 byte buffer
+    while match stream.read(&mut data) {
+        Ok(size) => {
+            // echo everything!
+            stream.write(&data[0..size]).unwrap();
+            true
+        }
+        Err(_) => {
+            println!(
+                "An error occurred, terminating connection with {}",
+                stream.peer_addr().unwrap()
+            );
+            stream.shutdown(Shutdown::Both).unwrap();
+            false
+        }
+    } {}
+}
+
+fn main() -> std::io::Result<()> {
+    let args: Vec<String> = env::args().collect();
+    println!("{:?}", args);
+
+    if args.len() != 5 && args.len() != 6 {
+        println!("Incorrect number of arguments.");
+        println!("  Usage: server <storage_path> <net_id> <local_ip> <local_port>");
+        println!("  Usage: client <storage_path> <net_id> <remote_ip> <remote_port>");
+    }
+
+    let storage_path = &args[2];
+    let net_id = u64::from_str_radix(&args[3], 16).unwrap();
+
+    println!("path   = {}", storage_path);
+    println!("net_id = {:x}", net_id);
+
+    // SET UP ZEROTIER
+
+    let nn = libzt::node::ZeroTierNode {};
+    // (Optional) initialization
+    nn.init_set_port(0);
+    nn.init_set_event_handler(user_event_handler);
+    nn.init_from_storage(&storage_path);
+    // Start the node
+    nn.start();
+    println!("Waiting for node to come online...");
+    while !nn.is_online() {
+        nn.delay(50);
+    }
+    println!("Node ID = {:#06x}", nn.id());
+    println!("Joining network");
+    nn.net_join(net_id);
+    println!("Waiting for network to assign addresses...");
+    while !nn.net_transport_is_ready(net_id) {
+        nn.delay(50);
+    }
+    let addr = nn.addr_get(net_id).unwrap();
+    println!("Assigned addr = {}", addr);
+
+    // Server
+
+    if &args[1] == "server" {
+        println!("server mode");
+        let mut addr_str: String = "".to_owned();
+        addr_str.push_str(&args[4]);
+        addr_str.push_str(":");
+        addr_str.push_str(&args[5]);
+
+        let server: std::net::SocketAddr =
+            addr_str.parse().expect("Unable to parse socket address");
+        let listener = TcpListener::bind(&server).unwrap();
+
+        for stream in listener.incoming() {
+            match stream {
+                Ok(stream) => {
+                    println!("New connection: {}", stream.peer_addr().unwrap());
+                    thread::spawn(move || {
+                        // connection succeeded
+                        handle_client(stream)
+                    });
+                }
+                Err(e) => {
+                    println!("Error: {}", e);
+                    // connection failed
+                }
+            }
+        }
+        drop(listener);
+    }
+
+    // Client
+
+    if &args[1] == "client" {
+        println!("client mode");
+        let mut addr_str: String = "".to_owned();
+        addr_str.push_str(&args[4]);
+        addr_str.push_str(":");
+        addr_str.push_str(&args[5]);
+        match TcpStream::connect(addr_str) {
+            Ok(mut stream) => {
+                println!("Successfully connected to server");
+
+                let msg = b"Hello!";
+
+                stream.write(msg).unwrap();
+                println!("Sent Hello, awaiting reply...");
+
+                let mut data = [0 as u8; 6];
+                match stream.read_exact(&mut data) {
+                    Ok(_) => {
+                        if &data == msg {
+                            println!("Reply is ok!");
+                        } else {
+                            let text = from_utf8(&data).unwrap();
+                            println!("Unexpected reply: {}", text);
+                        }
+                    }
+                    Err(e) => {
+                        println!("Failed to receive data: {}", e);
+                    }
+                }
+            }
+            Err(e) => {
+                println!("Failed to connect: {}", e);
+            }
+        }
+        println!("Terminated.");
+    }
+
+    nn.stop();
+    Ok(())
+}

pkg/crate/libzt/src/lib.rs

@@ -15,7 +15,8 @@
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
 
-pub mod libzt;
+include!(concat!(env!("OUT_DIR"), "/libzt.rs"));
+
 pub mod node;
 pub mod socket;
 pub mod tcp;

pkg/crate/libzt/src/node.rs

@@ -14,16 +14,17 @@
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
+#![allow(unused_variables)]
+
+include!(concat!(env!("OUT_DIR"), "/libzt.rs"));
 
-use crate::libzt::*;
 use std::ffi::{c_void, CStr, CString};
-use std::io;
 use std::net::{AddrParseError, IpAddr};
 use std::str::FromStr;
 
 extern "C" fn native_event_handler(msg: *mut c_void) {
     let event: &mut zts_event_msg_t = unsafe { &mut *(msg as *mut zts_event_msg_t) };
-    println!("event: {}", event.event_code);
+    //println!("event: {}", event.event_code);
     //user_event_handler(event.event_code);
 }
 

pkg/crate/libzt/src/socket.rs

@@ -21,7 +21,6 @@ use std::{io, mem};
 
 type time_t = i64;
 
-use crate::libzt::*;
 use crate::utils::*;
 
 // Note: FileDesc and c_int in libc are private so we can't use that. Use i32 instead

pkg/crate/libzt/src/tcp.rs

@@ -19,7 +19,6 @@ use std::os::raw::c_int;
 use std::time::Duration;
 use std::{cmp, mem};
 
-use crate::libzt::*;
 use crate::socket::Socket;
 use crate::utils::*;
 

pkg/crate/libzt/src/udp.rs

@@ -13,13 +13,12 @@
 
 use std::convert::TryInto;
 use std::ffi::{c_void, CString};
-use std::io::{self, Error, ErrorKind};
+use std::io::{self /*, Error, ErrorKind*/};
 use std::net::{/*Ipv4Addr, Ipv6Addr,*/ SocketAddr, ToSocketAddrs};
 use std::os::raw::c_int;
 use std::time::Duration;
 //use std::cmp;
 
-use crate::libzt::*;
 use crate::socket::Socket;
 use crate::utils::*;
 
@@ -82,24 +81,23 @@ impl UdpSocketImpl {
         self.inner.peek_from(buf)
     }
 
-    pub fn send_to(&self, buf: &[u8], dst: &SocketAddr) -> io::Result<usize> {
-        /*
-                let len = cmp::min(buf.len(), <size_t>::MAX as usize) as size_t;
-                let (dstp, dstlen) = dst.into_inner();
-                let ret = cvt(unsafe {
-                    zts_bsd_sendto(
-                        *self.inner.as_inner(),
-                        buf.as_ptr() as *const c_void,
-                        len,
-                        ZTS_MSG_NOSIGNAL,
-                        dstp,
-                        dstlen,
-                    )
-                })?;
-                Ok(ret as usize)
-        */
-        Ok(0)
-    }
+    /*
+        pub fn send_to(&self, buf: &[u8], dst: &SocketAddr) -> io::Result<usize> {
+            let len = cmp::min(buf.len(), <size_t>::MAX as usize) as size_t;
+            let (dstp, dstlen) = dst.into_inner();
+            let ret = cvt(unsafe {
+                zts_bsd_sendto(
+                    *self.inner.as_inner(),
+                    buf.as_ptr() as *const c_void,
+                    len,
+                    ZTS_MSG_NOSIGNAL,
+                    dstp,
+                    dstlen,
+                )
+            })?;
+            Ok(ret as usize)
+        }
+    */
 
     pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> {
         self.inner.set_timeout(dur, ZTS_SO_RCVTIMEO as i32)
@@ -317,17 +315,17 @@ impl UdpSocket {
     pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> {
         self.0.peek_from(buf)
     }
-
-    pub fn send_to<A: ToSocketAddrs>(&self, buf: &[u8], addr: A) -> io::Result<usize> {
-        match addr.to_socket_addrs()?.next() {
-            Some(addr) => self.0.send_to(buf, &addr),
-            None => Err(Error::new(
-                ErrorKind::InvalidInput,
-                "No address to send data to",
-            )),
+    /*
+        pub fn send_to<A: ToSocketAddrs>(&self, buf: &[u8], addr: A) -> io::Result<usize> {
+            match addr.to_socket_addrs()?.next() {
+                Some(addr) => self.0.send_to(buf, &addr),
+                None => Err(Error::new(
+                    ErrorKind::InvalidInput,
+                    "No address to send data to",
+                )),
+            }
         }
-    }
-
+    */
     pub fn peer_addr(&self) -> io::Result<SocketAddr> {
         self.0.peer_addr()
     }

pkg/crate/libzt/src/utils.rs

@@ -15,7 +15,8 @@
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
 
-use crate::libzt::*;
+include!(concat!(env!("OUT_DIR"), "/libzt.rs"));
+
 use std::ffi::c_void;
 use std::io::{Error, ErrorKind};
 use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};