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diff --git a/src/mds-server/queued-interception.h b/src/mds-server/queued-interception.h
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+++ b/src/mds-server/queued-interception.h
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+/**
+ * mds — A micro-display server
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef MDS_MDS_SERVER_QUEUED_INTERCEPTION_H
+#define MDS_MDS_SERVER_QUEUED_INTERCEPTION_H
+
+
+#include "client.h"
+
+#include <stdint.h>
+
+
+#define QUEUED_INTERCEPTION_T_VERSION  0
+
+/**
+ * A queued interception
+ */
+typedef struct queued_interception
+{
+  /**
+   * The intercepting client
+   */
+  struct client* client;
+  
+  /**
+   * The interception priority
+   */
+  int64_t priority;
+  
+  /**
+   * Whether the messages may get modified by the client
+   */
+  int modifying;
+  
+  /**
+   * The file descriptor of the intercepting client's socket (used for unmarshalling)
+   */
+  int socket_fd;
+  
+} queued_interception_t;
+
+
+/**
+ * Calculate the buffer size need to marshal a queued interception
+ * 
+ * @param   this  The client information
+ * @return        The number of bytes to allocate to the output buffer
+ */
+size_t queued_interception_marshal_size(void) __attribute__((const));
+
+/**
+ * Marshals a queued interception
+ * 
+ * @param   this  The queued interception
+ * @param   data  Output buffer for the marshalled data
+ * @return        The number of bytes that have been written (everything will be written)
+ */
+size_t queued_interception_marshal(const queued_interception_t* restrict this, char* restrict data);
+
+/**
+ * Unmarshals a queued interception
+ * 
+ * @param   this  Memory slot in which to store the new queued interception
+ * @param   data  In buffer with the marshalled data
+ * @return        Zero on error, errno will be set accordingly, otherwise the number of read bytes.
+ */
+size_t queued_interception_unmarshal(queued_interception_t* restrict this, char* restrict data);
+
+/**
+ * Pretend to unmarshal a queued interception
+ * 
+ * @param   data  In buffer with the marshalled data
+ * @return        The number of read bytes
+ */
+size_t queued_interception_unmarshal_skip(void) __attribute__((const));
+
+
+#endif
+