From a8595f5b03bb3eeca46b6313f723a67114fb81fd Mon Sep 17 00:00:00 2001
From: chrysn <chrysn@fsfe.org>
Date: Thu, 11 Apr 2024 12:44:20 +0200
Subject: [PATCH] coap: Use OS RNG

---
 examples/coap/Cargo.toml  | 3 ++-
 examples/coap/laze.yml    | 1 +
 examples/coap/src/main.rs | 3 +--
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/examples/coap/Cargo.toml b/examples/coap/Cargo.toml
index a5b2962cc..0c6219c79 100644
--- a/examples/coap/Cargo.toml
+++ b/examples/coap/Cargo.toml
@@ -25,7 +25,8 @@ coap-message = "0.3.1"
 embassy-futures = "0.1.1"
 coap-message-demos = { version = "0.4.0", default-features = false }
 coap-request-implementations = "0.1.0-alpha.4"
-rand = { version = "0.8.5", default-features = false, features = [ "small_rng" ] }
+# ... and we ensure that it is usable by laze-depending on rng
+riot-rs-random = { version = "0.1.0", path = "../../src/riot-rs-random" }
 
 [features]
 default = [ "proto-ipv4" ] # shame
diff --git a/examples/coap/laze.yml b/examples/coap/laze.yml
index ce37ee7fb..27218a407 100644
--- a/examples/coap/laze.yml
+++ b/examples/coap/laze.yml
@@ -3,3 +3,4 @@ apps:
     selects:
       - ?release
       - network
+      - rng
diff --git a/examples/coap/src/main.rs b/examples/coap/src/main.rs
index e795dec8e..5054f2bc3 100644
--- a/examples/coap/src/main.rs
+++ b/examples/coap/src/main.rs
@@ -74,8 +74,7 @@ where
     // Sync, and async_std expects to work in multiple threads
     embassy_futures::join::join(
         async {
-            let mut rand = rand::rngs::SmallRng::seed_from_u64(4);
-            use rand::SeedableRng;
+            let mut rand = riot_rs_random::get_rng();
             server
                 .run(
                     &mut sock,