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diff --git a/res/stasis/messaging.h b/res/stasis/messaging.h
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+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2014, Digium, Inc.
+ *
+ * Matt Jordan <mjordan@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+#ifndef _ASTERISK_RES_STASIS_MESSAGING_H
+#define _ASTERISK_RES_STASIS_MESSAGING_H
+
+/*!
+ * \file
+ *
+ * \brief Stasis out-of-call text message support
+ *
+ * \author Matt Jordan <mjordan@digium.com>
+ * \since 12.4.0
+ */
+
+/*!
+ * \brief Callback handler for when a message is received from the core
+ *
+ * \param endpoint_id The ID of the endpoint that we received the message from
+ * \param json_msg JSON representation of the text message
+ * \param pvt ao2 ref counted pvt passed during registration
+ *
+ * \retval 0 the message was handled
+ * \retval non-zero the message was not handled
+ */
+typedef int (* message_received_cb)(const char *endpoint_id, struct ast_json *json_msg, void *pvt);
+
+/*!
+ * \brief Subscribe for messages from a particular endpoint
+ *
+ * \param app_name Name of the stasis application to unsubscribe from messaging
+ * \param endpoint_id The ID of the endpoint we no longer care about
+ *
+ * \retval 0 success
+ * \retval -1 error
+ */
+void messaging_app_unsubscribe_endpoint(const char *app_name, const char *endpoint_id);
+
+/*!
+ * \brief Subscribe an application to an endpoint for messages
+ *
+ * \param app_name The name of the \ref stasis application to subscribe to \c endpoint
+ * \param endpoint The endpoint object to subscribe to
+ * \param message_received_cb The callback to call when a message is received
+ * \param pvt An ao2 ref counted object that will be passed to the callback.
+ *
+ * \retval 0 subscription was successful
+ * \retval -1 subscription failed
+ */
+int messaging_app_subscribe_endpoint(const char *app_name, struct ast_endpoint *endpoint, message_received_cb callback, void *pvt);
+
+/*!
+ * \brief Tidy up the messaging layer
+ *
+ * \retval 0 success
+ * \retval -1 failure
+ */
+int messaging_cleanup(void);
+
+/*!
+ * \brief Initialize the messaging layer
+ *
+ * \retval 0 success
+ * \retval -1 failure
+ */
+int messaging_init(void);
+
+#endif /* #define _ASTERISK_RES_STASIS_MESSAGING_H  */
+\ No newline at end of file