Add error code handling

client/internal/peer/conn.go

@@ -2,6 +2,7 @@ package peer
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"math/rand"
 	"net"
@@ -209,7 +210,11 @@ func (conn *Conn) Open(engineCtx context.Context) error {
 	// both peer send offer
 	if err := conn.handshaker.SendOffer(); err != nil {
 		conn.Log.Errorf("failed to send offer: %v", err)
-		conn.guard.FailedToSendOffer()
+		// if remote peer is offline, no need to try to reconnect.
+		// The remote peer when online will send an offer to us
+		if !errors.Is(err, ErrPeerNotAvailable) {
+			conn.guard.FailedToSendOffer()
+		}
 	}
 
 	conn.opened = true