use async_trait::async_trait;
use libp2prs_runtime::task;
use std::time::Duration;
#[macro_use]
extern crate lazy_static;
use std::{error::Error, io::Write};
use futures::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
use libp2prs_core::identity::Keypair;
use libp2prs_core::multiaddr::protocol::Protocol;
use libp2prs_core::transport::upgrade::TransportUpgrade;
use libp2prs_core::upgrade::UpgradeInfo;
use libp2prs_core::{Multiaddr, PeerId, ProtocolId};
use libp2prs_secio as secio;
use libp2prs_swarm::protocol_handler::{IProtocolHandler, Notifiee, ProtocolHandler, ProtocolImpl};
use libp2prs_swarm::substream::Substream;
use libp2prs_swarm::Swarm;
use libp2prs_tcp::TcpConfig;
use libp2prs_yamux as yamux;
use std::str::FromStr;
use structopt::StructOpt;
#[derive(StructOpt)]
struct Config {
client_or_server: String,
#[structopt(short = "d")]
dest_multiaddr: Option<String>,
#[structopt(short = "s")]
source_port: Option<u16>,
}
fn main() {
env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();
let options = Config::from_args();
if options.client_or_server == "server" && options.source_port.is_some() {
log::info!("Starting server ......");
run_server();
} else if options.client_or_server == "client" && options.dest_multiaddr.is_some() {
log::info!("Starting client ......");
run_client();
} else {
panic!("param error")
}
}
lazy_static! {
static ref SERVER_KEY: Keypair = Keypair::generate_ed25519_fixed();
}
const PROTO_NAME: &[u8] = b"/chat/1.0.0";
async fn write_data<C>(mut stream: C)
where
C: AsyncWrite + Unpin,
{
loop {
print!("> ");
let _ = std::io::stdout().flush();
let mut input = String::new();
let n = std::io::stdin().read_line(&mut input).unwrap();
let _ = stream.write_all(&input.as_bytes()[0..n]).await;
let _ = stream.flush().await;
}
}
async fn read_data<C>(mut stream: C)
where
C: AsyncRead + Unpin,
{
loop {
let mut buf = [0; 4096];
let n = stream.read(&mut buf).await.unwrap();
let str = String::from_utf8_lossy(&buf[0..n]);
if str == "" {
return;
}
if str != "\n" {
print!("\x1b[32m{}\x1b[0m> ", str);
let _ = std::io::stdout().flush();
}
}
}
struct Chat;
impl ProtocolImpl for Chat {
fn handler(&self) -> IProtocolHandler {
Box::new(ChatHandler)
}
}
#[derive(Clone)]
struct ChatHandler;
impl UpgradeInfo for ChatHandler {
type Info = ProtocolId;
fn protocol_info(&self) -> Vec<Self::Info> {
vec![PROTO_NAME.into()]
}
}
impl Notifiee for ChatHandler {}
#[async_trait]
impl ProtocolHandler for ChatHandler {
async fn handle(&mut self, stream: Substream, _info: <Self as UpgradeInfo>::Info) -> Result<(), Box<dyn Error>> {
log::trace!("ChatHandler handling inbound {:?}", stream);
let (r, w) = stream.split();
task::spawn(async {
read_data(r).await;
});
task::spawn(async {
write_data(w).await;
});
Ok(())
}
fn box_clone(&self) -> IProtocolHandler {
Box::new(self.clone())
}
}
#[allow(clippy::empty_loop)]
fn run_server() {
let keys = SERVER_KEY.clone();
let options = Config::from_args();
let listen_addr = format!("/ip4/127.0.0.1/tcp/{}", &(options.source_port.unwrap())).parse().unwrap();
let sec = secio::Config::new(keys.clone());
let mux = yamux::Config::server();
let tu = TransportUpgrade::new(TcpConfig::default(), mux, sec);
let mut swarm = Swarm::new(keys.public()).with_transport(Box::new(tu)).with_protocol(Chat);
log::info!("Swarm created, local-peer-id={:?}", swarm.local_peer_id());
let _control = swarm.control();
swarm.listen_on(vec![listen_addr]).unwrap();
swarm.start();
loop {}
}
fn run_client() {
let keys = Keypair::generate_secp256k1();
let options = Config::from_args();
let mut dial_addr = Multiaddr::from_str(&(options.dest_multiaddr.unwrap())).unwrap();
let last_protocol = dial_addr.pop().unwrap();
let remote_peer_id = match last_protocol {
Protocol::P2p(data) => PeerId::from_multihash(data).unwrap(),
_ => panic!("expect p2p protocol"),
};
let sec = secio::Config::new(keys.clone());
let mux = yamux::Config::client();
let tu = TransportUpgrade::new(TcpConfig::default(), mux, sec);
let swarm = Swarm::new(keys.public()).with_transport(Box::new(tu));
let mut control = swarm.control();
log::info!("about to connect to {:?}", remote_peer_id);
swarm.start();
task::block_on(async move {
control.connect_with_addrs(remote_peer_id, vec![dial_addr]).await.unwrap();
let stream = control.new_stream(remote_peer_id, vec![PROTO_NAME.into()]).await.unwrap();
log::info!("stream {:?} opened, writing something...", stream);
let (r, w) = stream.split();
task::spawn(async {
read_data(r).await;
});
task::spawn(async {
write_data(w).await;
});
loop {
task::sleep(Duration::from_secs(10)).await;
}
});
}