chore(code): Add error message suggesting sudo if permission error (#59) (#67)

* chore(code): Add error message suggesting sudo if permission error (#59)

I decided to use a nested match statement for further handling
of the error, since it appears to be more rustesqe than a
if statement.

* fix(debugging): remove message

Co-authored-by: Aram Drevekenin <aram@poor.dev>

1 files changed, 10 insertions, 5 deletions

diff --git a/src/os/shared.rs b/src/os/shared.rs
index 5245de7..8fd1300 100644
--- a/src/os/shared.rs
+++ b/src/os/shared.rs
@@ -39,11 +39,16 @@ fn get_datalink_channel(
     match datalink::channel(interface, config) {
         Ok(Ethernet(_tx, rx)) => Ok(rx),
         Ok(_) => failure::bail!("Unknown interface type"),
-        Err(e) => failure::bail!(
-            "Failed to listen on network interface {}: {}",
-            interface.name,
-            e
-        ),
+        Err(e) => {
+            match e.kind() {
+                std::io::ErrorKind::PermissionDenied => failure::bail!("Failed to listen on network interface due to permission error. Try running with sudo"),
+                _ => failure::bail!(
+                    "Failed to listen on network interface {}: {}",
+                    interface.name,
+                    e
+                ),
+            }
+        }
     }
 }