handle ipv6 link loss correctly

1 files changed, 6 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index f70dc7c..b80f70f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 use std::fs::File;
 use std::io;
 use std::net::{Ipv6Addr, SocketAddr};
+use std::path::Path;
 use std::thread;
 use std::time::Duration;
 
@@ -54,6 +55,11 @@ fn main() -> Result<()> {
 fn logic(tnl: &mut Option<IpIp6>) -> Result<()> {
     *tnl = None; // Delete old tunnel.
 
+    if !Path::new(rsdsl_pd_config::LOCATION).exists() {
+        println!("[info] ipv6 down");
+        return Ok(());
+    }
+
     let mut file = File::open(rsdsl_pd_config::LOCATION)?;
     let pdconfig: PdConfig = serde_json::from_reader(&mut file)?;