From 575117efe1e0eb8073c2d26ae3dff8926be00591 Mon Sep 17 00:00:00 2001
From: Frederik Wedel-Heinen <frederik.wedel-heinen@dencrypt.dk>
Date: Fri, 12 Jan 2024 10:14:43 +0100
Subject: [PATCH] Error in s_server when -rev option is used with dtls.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23278)
---
 apps/s_server.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/apps/s_server.c b/apps/s_server.c
index 93f6cb2983..b1164d10cc 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -1714,6 +1714,11 @@ int s_server_main(int argc, char *argv[])
         BIO_printf(bio_err, "Can only use -listen with DTLS\n");
         goto end;
     }
+
+    if (rev && socket_type == SOCK_DGRAM) {
+        BIO_printf(bio_err, "Can't use -rev with DTLS\n");
+        goto end;
+    }
 #endif
 
     if (tfo && socket_type != SOCK_STREAM) {