From 6b081f49c4fdfbc62c2d0484b448103d03c54958 Mon Sep 17 00:00:00 2001
From: ddidderr <ddidderr@paul.network>
Date: Fri, 22 May 2026 06:43:25 +0200
Subject: [PATCH] docs: align gateway test command with cli help

Use the canonical --interface flag in the README and MVP test guide so the
handoff command matches lanparty-gateway --help. Keep --iface documented as the
shorter accepted alias because the CLI and tests still support it.

Test Plan:
- ./target/release/lanparty-gateway --help
- cargo test -p lanparty-gateway accepts_iface_alias_for_gateway_interface
- git diff --check
- git diff --cached --check

Refs: MVP test handoff polish
---
 README.md  | 2 +-
 TESTING.md | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 2486804..9797f7f 100644
--- a/README.md
+++ b/README.md
@@ -173,7 +173,7 @@ cargo run -p lanparty-gateway -- \
   --server-name lanparty-relay.local \
   --relay-ca-cert relay-cert.der \
   --room ROOM1 \
-  --iface eth0
+  --interface eth0
 ```
 
 The gateway first opens the wired LAN interface as an AF_PACKET socket with
diff --git a/TESTING.md b/TESTING.md
index 5c7ee52..649e1f1 100644
--- a/TESTING.md
+++ b/TESTING.md
@@ -90,11 +90,12 @@ sudo ./target/release/lanparty-gateway \
   --server-name lanparty-relay.local \
   --relay-ca-cert ./relay-cert.der \
   --room ROOM1 \
-  --iface eth0
+  --interface eth0
 ```
 
-Use the real wired LAN interface name for `--iface`. Do not use Wi-Fi. The
-gateway fails before joining the relay if sysfs reports no Ethernet carrier.
+Use the real wired LAN interface name for `--interface`. `--iface` is accepted
+as a shorter alias. Do not use Wi-Fi. The gateway fails before joining the
+relay if sysfs reports no Ethernet carrier.
 
 Expected gateway output: