/usr/include/scamper_icmpext.h is in libscamperfile0-dev 20171204-2.
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 1.2 2012/11/26 20:54:46 mjl Exp $
*
* Copyright (C) 2008 The University of Waikato
* Copyright (C) 2012 Matthew Luckie
* Author: Matthew Luckie
*
* 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_IS_UNNUMBERED(ie) \
((ie)->ie_cn == 2)
#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])
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_ROLE(ie) \
((ie)->ie_data[0] >> 6)
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_ROLE_ARRIVED_IP 0
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_ROLE_ARRIVED_SUBIP 1
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_ROLE_FORWARD 2
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_ROLE_NEXTHOP 3
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IFINDEX 4
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IPADDR 5
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_NAME 6
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_MTU 7
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IS_IFINDEX(ie) \
((ie)->ie_ct & SCAMPER_ICMPEXT_UNNUMBERED_CT_IFINDEX)
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IS_IPADDR(ie) \
((ie)->ie_ct & SCAMPER_ICMPEXT_UNNUMBERED_CT_IPADDR)
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IS_NAME(ie) \
((ie)->ie_ct & SCAMPER_ICMPEXT_UNNUMBERED_CT_NAME)
#define SCAMPER_ICMPEXT_UNNUMBERED_CT_IS_MTU(ie) \
((ie)->ie_ct & SCAMPER_ICMPEXT_UNNUMBERED_CT_MTU)
typedef struct scamper_icmpext_unnumbered
{
uint8_t flags;
uint32_t ifindex;
int af;
union
{
struct in_addr v4;
struct in6_addr v6;
} un;
char name[64];
uint32_t mtu;
} scamper_icmpext_unnumbered_t;
void scamper_icmpext_unnumbered_parse(scamper_icmpext_t *ext,
scamper_icmpext_unnumbered_t *unn);
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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