chanmgr: trace-level logs when launching connections.

Based on more temporary debugging code. Yet another part of #677.

crates/tor-chanmgr/src/transport/default.rs

@@ -9,6 +9,7 @@ use safelog::sensitive as sv;
 use tor_error::bad_api_usage;
 use tor_linkspec::{ChannelMethod, HasChanMethod, OwnedChanTarget};
 use tor_rtcompat::{Runtime, TcpProvider};
+use tracing::trace;
 
 use crate::Error;
 
@@ -50,6 +51,8 @@ impl<R: Runtime> crate::transport::TransportImplHelper for DefaultTransport<R> {
             }
         };
 
+        trace!("Launching direct connection for {}", target);
+
         let (stream, addr) = connect_to_one(&self.runtime, &direct_addrs).await?;
         let mut using_target = target.clone();
         let _ignore = using_target.chan_method_mut().retain_addrs(|a| a == &addr);

crates/tor-chanmgr/src/transport/proxied.rs

@@ -26,6 +26,7 @@ use tor_rtcompat::TcpProvider;
 use tor_socksproto::{
     SocksAddr, SocksAuth, SocksClientHandshake, SocksCmd, SocksRequest, SocksStatus, SocksVersion,
 };
+use tracing::trace;
 
 #[cfg(feature = "pt-client")]
 use super::TransportImplHelper;
@@ -69,6 +70,12 @@ pub(crate) async fn connect_via_proxy<R: TcpProvider + Send + Sync>(
     protocol: &Protocol,
     target: &PtTargetAddr,
 ) -> Result<R::TcpStream, ProxyError> {
+    trace!(
+        "Launching a proxied connection to {} via proxy at {} using {:?}",
+        target,
+        proxy,
+        protocol
+    );
     let mut stream = runtime
         .connect(proxy)
         .await
@@ -147,6 +154,11 @@ pub(crate) async fn connect_via_proxy<R: TcpProvider + Send + Sync>(
     let status = reply
         .ok_or_else(|| internal!("SOCKS protocol finished, but gave no status!"))?
         .status();
+    trace!(
+        "SOCKS handshake with {} succeeded, with status {:?}",
+        proxy,
+        status
+    );
 
     if status != SocksStatus::SUCCEEDED {
         return Err(ProxyError::SocksError(status));