This file is indexed.

/usr/include/kannel/wap/wtp_pdu.def is in kannel-dev 1.4.3-2fakesync2build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2009 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the 
 *    distribution. 
 * 
 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
 * 
 * 4. The names "Kannel" and "Kannel Group" must not be used to 
 *    endorse or promote products derived from this software without 
 *    prior written permission. For written permission, please  
 *    contact org@kannel.org. 
 * 
 * 5. Products derived from this software may not be called "Kannel", 
 *    nor may "Kannel" appear in their name, without prior written 
 *    permission of the Kannel Group. 
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED.  IN NO EVENT SHALL THE KANNEL GROUP OR ITS CONTRIBUTORS 
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,  
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT  
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR  
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,  
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE  
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
 * WapIT Ltd., Helsinki, Finland for the Kannel project.  
 */ 

PDU(Invoke, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 1)
	UINT(gtr, "Group trailer (GTR)", 1)
	UINT(ttr, "Transmission trailer (TTR)", 1)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	UINT(version, "WTP protocol version", 2)
	UINT(tidnew, "TIDnew flag", 1)
	UINT(uack, "User ack flag", 1)
	RESERVED(2)
	UINT(class, "Transaction class (TCL)", 2)
	TPI(con)
	REST(user_data, "Payload")
	, p->class <= 2)

PDU(Result, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 2)
	UINT(gtr, "Group trailer (GTR)", 1)
	UINT(ttr, "Transmission trailer (TTR)", 1)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	TPI(con)
	REST(user_data, "Payload")
	, 1)

PDU(Ack, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 3)
	UINT(tidverify, "TID verify / TID OK flag", 1)
	RESERVED(1)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	TPI(con)
	, 1)

PDU(Abort, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 4)
	UINT(abort_type, "Abort type", 3)
	UINT(tid, "Transaction ID (TID)", 16)
	UINT(abort_reason, "Abort reason", 8)
	TPI(con)
	, p->abort_type <= 1)

PDU(Segmented_invoke, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 5)
	UINT(gtr, "Group trailer (GTR)", 1)
	UINT(ttr, "Transmission trailer (TTR)", 1)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	UINT(psn, "Packet sequence number", 8)
	TPI(con)
	REST(user_data, "Payload")
	, 1)

PDU(Segmented_result, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 6)
	UINT(gtr, "Group trailer (GTR)", 1)
	UINT(ttr, "Transmission trailer (TTR)", 1)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	UINT(psn, "Packet sequence number", 8)
	TPI(con)
	REST(user_data, "Payload")
	, 1)

PDU(Negative_ack, "...",
	UINT(con, "Continue flag (CON)", 1)
	TYPE(4, 7)
	RESERVED(2)
	UINT(rid, "Re-transmission indicator (RID)", 1)
	UINT(tid, "Transaction ID (TID)", 16)
	UINT(nmissing, "Number of missing packets", 8)
	OCTSTR(missing, "Missing packet PSNs", nmissing)
	TPI(con)
	, 1)