/usr/include/scamper_icmpext.h is in libscamperfile0-dev 20110503-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* scamper_icmpext.h
*
* $Id: scamper_icmpext.h,v 1.1 2008/05/01 22:10:56 mjl Exp $
*
* Copyright (C) 2008 The University of Waikato
* Author: Matthew Luckie
*
* Load-balancer traceroute technique authored by
* Ben Augustin, Timur Friedman, Renata Teixeira; "Measuring Load-balanced
* Paths in the Internet", in Proc. Internet Measurement Conference 2007.
*
* 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, version 2.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SCAMPER_ICMPEXT_H
#define __SCAMPER_ICMPEXT_H
/*
* scamper_icmpext
*
* this structure holds an individual icmp extension
*/
typedef struct scamper_icmpext
{
uint8_t ie_cn; /* class number */
uint8_t ie_ct; /* class type */
uint16_t ie_dl; /* data length */
uint8_t *ie_data; /* data */
struct scamper_icmpext *ie_next;
} scamper_icmpext_t;
#define SCAMPER_ICMPEXT_IS_MPLS(ie) \
((ie)->ie_cn == 1 && (ie)->ie_ct == 1)
#define SCAMPER_ICMPEXT_MPLS_COUNT(ie) \
((ie)->ie_dl >> 2)
#define SCAMPER_ICMPEXT_MPLS_LABEL(ie, x) \
(( (ie)->ie_data[((x)<<2)+0] << 12) + \
( (ie)->ie_data[((x)<<2)+1] << 4) + \
(((ie)->ie_data[((x)<<2)+2] >> 4) & 0xff))
#define SCAMPER_ICMPEXT_MPLS_EXP(ie, x) \
(((ie)->ie_data[((x)<<2)+2] >> 1) & 0x7)
#define SCAMPER_ICMPEXT_MPLS_S(ie, x) \
((ie)->ie_data[((x)<<2)+2] & 0x1)
#define SCAMPER_ICMPEXT_MPLS_TTL(ie, x) \
((ie)->ie_data[((x)<<2)+3])
scamper_icmpext_t *scamper_icmpext_alloc(uint8_t cn, uint8_t ct, uint16_t dl,
const void *data);
int scamper_icmpext_parse(scamper_icmpext_t **ext, void *data, uint16_t len);
void scamper_icmpext_free(scamper_icmpext_t *exts);
#endif /* __SCAMPER_ICMPEXT_H */
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