From c2377fd2669caea8b71e94fc7acb584b2e05c7c4 Mon Sep 17 00:00:00 2001
From: Juliusz Sosinowicz <juliusz@wolfssl.com>
Date: Thu, 6 Nov 2025 17:11:38 +0100
Subject: [PATCH] DTLS: Clear userSet when peer is set in EmbedReceiveFrom

This allows us to differentiate between the user explicitly setting a peer and wolfio setting it. When wolfio sets the peer, we want to be able to update the peer address while in stateless parsing (governed by the `newPeer` variable).
---
 src/wolfio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/wolfio.c b/src/wolfio.c
index 53a5ad0c6..599978e71 100644
--- a/src/wolfio.c
+++ b/src/wolfio.c
@@ -872,6 +872,7 @@ int EmbedReceiveFrom(WOLFSSL *ssl, char *buf, int sz, void *ctx)
                 /* Store size of saved address. Locking handled internally. */
                 if (wolfSSL_dtls_set_peer(ssl, peer, peerSz) != WOLFSSL_SUCCESS)
                     return WOLFSSL_CBIO_ERR_GENERAL;
+                dtlsCtx->userSet = 0;
             }
 #ifndef WOLFSSL_PEER_ADDRESS_CHANGES
             else {