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diff --git a/src/service/messenger/gnunet-service-messenger_message_recv.h b/src/service/messenger/gnunet-service-messenger_message_recv.h
new file mode 100644
index 000000000..104d62ba0
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+++ b/src/service/messenger/gnunet-service-messenger_message_recv.h
@@ -0,0 +1,85 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2020--2023 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @author Tobias Frisch
+ * @file src/messenger/gnunet-service-messenger_message_recv.h
+ * @brief GNUnet MESSENGER service
+ */
+
+#ifndef GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H
+#define GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+#include "gnunet-service-messenger_member_session.h"
+#include "gnunet-service-messenger_tunnel.h"
+#include "messenger_api_message.h"
+
+/**
+ * Handles a received info message to change the current member id to the one generated by
+ * the host connected to. (all current tunnels will be informed about the id change)
+ *
+ * @param[in,out] room Room of the message
+ * @param[in,out] tunnel Receiving connection
+ * @param[in] message INFO-Message
+ * @param[in] hash Hash of the message
+ * @return #GNUNET_NO to not forward the message
+ */
+int
+recv_message_info (struct GNUNET_MESSENGER_SrvRoom *room,
+                   struct GNUNET_MESSENGER_SrvTunnel *tunnel,
+                   const struct GNUNET_MESSENGER_Message *message,
+                   const struct GNUNET_HashCode *hash);
+
+/**
+ * Handles a received peer message to link it to its origin tunnel if the peer identity matches.
+ * (the peer message and the member id can potentially be linked to the tunnel)
+ *
+ * @param[in,out] room Room of the message
+ * @param[in,out] tunnel Receiving connection
+ * @param[in] message PEER-Message
+ * @param[in] hash Hash of the message
+ * @return #GNUNET_YES to forward the message
+ */
+int
+recv_message_peer (struct GNUNET_MESSENGER_SrvRoom *room,
+                   struct GNUNET_MESSENGER_SrvTunnel *tunnel,
+                   const struct GNUNET_MESSENGER_Message *message,
+                   const struct GNUNET_HashCode *hash);
+
+/**
+ * Handles a received request message by checking for the requested message and forwarding it back
+ * if the message was found.
+ * (this can also cause this peer to send a new request instead of only forwarding the received one)
+ *
+ * @param[in,out] room Room of the message
+ * @param[in,out] tunnel Receiving connection
+ * @param[in] message REQUEST-Message
+ * @param[in] hash Hash of the message
+ * @return #GNUNET_YES or #GNUNET_NO depending on required forwarding
+ */
+int
+recv_message_request (struct GNUNET_MESSENGER_SrvRoom *room,
+                      struct GNUNET_MESSENGER_SrvTunnel *tunnel,
+                      const struct GNUNET_MESSENGER_Message *message,
+                      const struct GNUNET_HashCode *hash);
+
+#endif //GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H