From bac156bcf5854ae2fe28e40b66336c5b88f904d3 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Tue, 15 Aug 2023 13:05:53 -0400
Subject: [PATCH] cell: Add code to iterate over IntroEstablished extensions

---
 crates/tor-cell/semver.md           | 1 +
 crates/tor-cell/src/relaycell/hs.rs | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/crates/tor-cell/semver.md b/crates/tor-cell/semver.md
index c8d977be2..d187e5957 100644
--- a/crates/tor-cell/semver.md
+++ b/crates/tor-cell/semver.md
@@ -1 +1,2 @@
 ADDED: establish_intro functions now take any impl<Into<HsMacKey>>.
+ADDED: Iterator over IntroEstablishedExt.
diff --git a/crates/tor-cell/src/relaycell/hs.rs b/crates/tor-cell/src/relaycell/hs.rs
index 2aa07dc61..45510c8e9 100644
--- a/crates/tor-cell/src/relaycell/hs.rs
+++ b/crates/tor-cell/src/relaycell/hs.rs
@@ -310,7 +310,8 @@ decl_extension_group! {
     ///
     /// (Currently, no extensions of this type are recognized)
     #[derive(Debug,Clone)]
-    enum IntroEstablishedExt [ IntroEstablishedExtType ] {
+    #[non_exhaustive]
+    pub enum IntroEstablishedExt [ IntroEstablishedExtType ] {
     }
 }
 
@@ -327,6 +328,11 @@ impl IntroEstablished {
     pub fn new() -> Self {
         Self::default()
     }
+
+    /// Return an iterator over the extensions declared in this message.
+    pub fn iter_extensions(&self) -> impl Iterator<Item = &IntroEstablishedExt> {
+        self.extensions.iter()
+    }
 }
 
 impl Body for IntroEstablished {