From 2ea2dd19e2c6e17acbaf03128c648eb80af46045 Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@codeconstruct.com.au>
Date: Thu, 16 Oct 2025 15:48:57 +0800
Subject: [PATCH] mctp-estack: Add clear_eid()

A counterpart of set_eid(). set_eid() doesn't allow setting a NULL EID.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
---
 mctp-estack/src/lib.rs    | 7 ++++++-
 mctp-estack/src/router.rs | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/mctp-estack/src/lib.rs b/mctp-estack/src/lib.rs
index dc787cf..2d07ee2 100644
--- a/mctp-estack/src/lib.rs
+++ b/mctp-estack/src/lib.rs
@@ -49,7 +49,7 @@ pub use heapless::Vec;
 
 use heapless::{Entry, FnvIndexMap};
 
-use mctp::{Eid, Error, MsgIC, MsgType, Result, Tag, TagValue};
+use mctp::{Eid, Error, MsgIC, MsgType, Result, Tag, TagValue, MCTP_ADDR_NULL};
 
 #[cfg(not(any(feature = "log", feature = "defmt")))]
 compile_error!("Either log or defmt feature must be enabled");
@@ -490,6 +490,11 @@ impl Stack {
         Ok(())
     }
 
+    /// Clears the local Endpoint ID.
+    pub fn clear_eid(&mut self) {
+        self.own_eid = MCTP_ADDR_NULL;
+    }
+
     /// Retrieves  the local Endpoint ID.
     pub fn eid(&self) -> Eid {
         self.own_eid
diff --git a/mctp-estack/src/router.rs b/mctp-estack/src/router.rs
index 23644f8..d664bd3 100644
--- a/mctp-estack/src/router.rs
+++ b/mctp-estack/src/router.rs
@@ -812,6 +812,12 @@ impl<'r> Router<'r> {
         let mut inner = self.inner.lock().await;
         inner.stack.set_eid(eid.0)
     }
+
+    /// Clears the EID assigned to the local stack
+    pub async fn clear_eid(&self) {
+        let mut inner = self.inner.lock().await;
+        inner.stack.clear_eid();
+    }
 }
 
 impl core::fmt::Debug for Router<'_> {