sync rustdesk's hbb_common here

libs/hbb_common/src/socket_client.rs

@@ -9,31 +9,15 @@ use std::net::SocketAddr;
 use tokio::net::ToSocketAddrs;
 use tokio_socks::{IntoTargetAddr, TargetAddr};
 
-fn to_socket_addr(host: &str) -> ResultType<SocketAddr> {
-    use std::net::ToSocketAddrs;
-    host.to_socket_addrs()?
-        .filter(|x| x.is_ipv4())
-        .next()
-        .context("Failed to solve")
-}
-
-pub fn get_target_addr(host: &str) -> ResultType<TargetAddr<'static>> {
-    let addr = match Config::get_network_type() {
-        NetworkType::Direct => to_socket_addr(&host)?.into_target_addr()?,
-        NetworkType::ProxySocks => host.into_target_addr()?,
-    }
-    .to_owned();
-    Ok(addr)
-}
-
 pub fn test_if_valid_server(host: &str) -> String {
     let mut host = host.to_owned();
     if !host.contains(":") {
         host = format!("{}:{}", host, 0);
     }
 
+    use std::net::ToSocketAddrs;
     match Config::get_network_type() {
-        NetworkType::Direct => match to_socket_addr(&host) {
+        NetworkType::Direct => match host.to_socket_addrs() {
             Err(err) => err.to_string(),
             Ok(_) => "".to_owned(),
         },
@@ -44,33 +28,126 @@ pub fn test_if_valid_server(host: &str) -> String {
     }
 }
 
-pub async fn connect_tcp<'t, T: IntoTargetAddr<'t>>(
+pub trait IsResolvedSocketAddr {
+    fn resolve(&self) -> Option<&SocketAddr>;
+}
+
+impl IsResolvedSocketAddr for SocketAddr {
+    fn resolve(&self) -> Option<&SocketAddr> {
+        Some(&self)
+    }
+}
+
+impl IsResolvedSocketAddr for String {
+    fn resolve(&self) -> Option<&SocketAddr> {
+        None
+    }
+}
+
+impl IsResolvedSocketAddr for &str {
+    fn resolve(&self) -> Option<&SocketAddr> {
+        None
+    }
+}
+
+#[inline]
+pub async fn connect_tcp<
+    't,
+    T: IntoTargetAddr<'t> + ToSocketAddrs + IsResolvedSocketAddr + std::fmt::Display,
+>(
     target: T,
-    local: SocketAddr,
     ms_timeout: u64,
 ) -> ResultType<FramedStream> {
-    let target_addr = target.into_target_addr()?;
+    connect_tcp_local(target, None, ms_timeout).await
+}
 
+pub async fn connect_tcp_local<
+    't,
+    T: IntoTargetAddr<'t> + ToSocketAddrs + IsResolvedSocketAddr + std::fmt::Display,
+>(
+    target: T,
+    local: Option<SocketAddr>,
+    ms_timeout: u64,
+) -> ResultType<FramedStream> {
     if let Some(conf) = Config::get_socks() {
-        FramedStream::connect(
+        return FramedStream::connect(
             conf.proxy.as_str(),
-            target_addr,
+            target,
             local,
             conf.username.as_str(),
             conf.password.as_str(),
             ms_timeout,
         )
-        .await
-    } else {
-        let addr = std::net::ToSocketAddrs::to_socket_addrs(&target_addr)?
-            .filter(|x| x.is_ipv4())
-            .next()
-            .context("Invalid target addr, no valid ipv4 address can be resolved.")?;
-        Ok(FramedStream::new(addr, local, ms_timeout).await?)
+        .await;
+    }
+    if let Some(target) = target.resolve() {
+        if let Some(local) = local {
+            if local.is_ipv6() && target.is_ipv4() {
+                let target = query_nip_io(&target).await?;
+                return Ok(FramedStream::new(target, Some(local), ms_timeout).await?);
+            }
+        }
+    }
+    Ok(FramedStream::new(target, local, ms_timeout).await?)
+}
+
+#[inline]
+pub fn is_ipv4(target: &TargetAddr<'_>) -> bool {
+    match target {
+        TargetAddr::Ip(addr) => addr.is_ipv4(),
+        _ => true,
     }
 }
 
-pub async fn new_udp<T: ToSocketAddrs>(local: T, ms_timeout: u64) -> ResultType<FramedSocket> {
+#[inline]
+pub async fn query_nip_io(addr: &SocketAddr) -> ResultType<SocketAddr> {
+    tokio::net::lookup_host(format!("{}.nip.io:{}", addr.ip(), addr.port()))
+        .await?
+        .filter(|x| x.is_ipv6())
+        .next()
+        .context("Failed to get ipv6 from nip.io")
+}
+
+#[inline]
+pub fn ipv4_to_ipv6(addr: String, ipv4: bool) -> String {
+    if !ipv4 && crate::is_ipv4_str(&addr) {
+        if let Some(ip) = addr.split(":").next() {
+            return addr.replace(ip, &format!("{}.nip.io", ip));
+        }
+    }
+    addr
+}
+
+async fn test_target(target: &str) -> ResultType<SocketAddr> {
+    if let Ok(Ok(s)) = super::timeout(1000, tokio::net::TcpStream::connect(target)).await {
+        if let Ok(addr) = s.peer_addr() {
+            return Ok(addr);
+        }
+    }
+    tokio::net::lookup_host(target)
+        .await?
+        .next()
+        .context(format!("Failed to look up host for {}", target))
+}
+
+#[inline]
+pub async fn new_udp_for(
+    target: &str,
+    ms_timeout: u64,
+) -> ResultType<(FramedSocket, TargetAddr<'static>)> {
+    let (ipv4, target) = if NetworkType::Direct == Config::get_network_type() {
+        let addr = test_target(target).await?;
+        (addr.is_ipv4(), addr.into_target_addr()?)
+    } else {
+        (true, target.into_target_addr()?)
+    };
+    Ok((
+        new_udp(Config::get_any_listen_addr(ipv4), ms_timeout).await?,
+        target.to_owned(),
+    ))
+}
+
+async fn new_udp<T: ToSocketAddrs>(local: T, ms_timeout: u64) -> ResultType<FramedSocket> {
     match Config::get_socks() {
         None => Ok(FramedSocket::new(local).await?),
         Some(conf) => {
@@ -87,9 +164,56 @@ pub async fn new_udp<T: ToSocketAddrs>(local: T, ms_timeout: u64) -> ResultType<
     }
 }
 
-pub async fn rebind_udp<T: ToSocketAddrs>(local: T) -> ResultType<Option<FramedSocket>> {
-    match Config::get_network_type() {
-        NetworkType::Direct => Ok(Some(FramedSocket::new(local).await?)),
-        _ => Ok(None),
+pub async fn rebind_udp_for(
+    target: &str,
+) -> ResultType<Option<(FramedSocket, TargetAddr<'static>)>> {
+    if Config::get_network_type() != NetworkType::Direct {
+        return Ok(None);
+    }
+    let addr = test_target(target).await?;
+    let v4 = addr.is_ipv4();
+    Ok(Some((
+        FramedSocket::new(Config::get_any_listen_addr(v4)).await?,
+        addr.into_target_addr()?.to_owned(),
+    )))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::net::ToSocketAddrs;
+
+    use super::*;
+
+    #[test]
+    fn test_nat64() {
+        test_nat64_async();
+    }
+
+    #[tokio::main(flavor = "current_thread")]
+    async fn test_nat64_async() {
+        assert_eq!(ipv4_to_ipv6("1.1.1.1".to_owned(), true), "1.1.1.1");
+        assert_eq!(ipv4_to_ipv6("1.1.1.1".to_owned(), false), "1.1.1.1.nip.io");
+        assert_eq!(
+            ipv4_to_ipv6("1.1.1.1:8080".to_owned(), false),
+            "1.1.1.1.nip.io:8080"
+        );
+        assert_eq!(
+            ipv4_to_ipv6("rustdesk.com".to_owned(), false),
+            "rustdesk.com"
+        );
+        if ("rustdesk.com:80")
+            .to_socket_addrs()
+            .unwrap()
+            .next()
+            .unwrap()
+            .is_ipv6()
+        {
+            assert!(query_nip_io(&"1.1.1.1:80".parse().unwrap())
+                .await
+                .unwrap()
+                .is_ipv6());
+            return;
+        }
+        assert!(query_nip_io(&"1.1.1.1:80".parse().unwrap()).await.is_err());
     }
 }