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/* $OpenBSD: print-frag6.c,v 1.10 2020/01/24 22:46:36 procter Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <netinet/ip6.h>
#include "interface.h"
#include "addrtoname.h"
int
frag6_print(const u_char *bp, const u_char *bp2)
{
const struct ip6_frag *dp;
const struct ip6_hdr *ip6;
const u_char *ep;
#if 0
#define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc
#endif
dp = (struct ip6_frag *)bp;
ip6 = (struct ip6_hdr *)bp2;
/* 'ep' points to the end of avaible data. */
ep = snapend;
TCHECK(dp->ip6f_ident);
printf("frag (0x%08x:%ld@%d%s)",
ntohl(dp->ip6f_ident),
sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) -
(long)(bp - bp2) - sizeof(struct ip6_frag),
ntohs(dp->ip6f_offlg & IP6F_OFF_MASK),
(dp->ip6f_offlg & IP6F_MORE_FRAG) ? "+" : "");
/* it is meaningless to decode non-first fragment */
if (ntohs(dp->ip6f_offlg & IP6F_OFF_MASK) != 0)
return 65535;
else
{
printf(" ");
return sizeof(struct ip6_frag);
}
trunc:
printf("[|frag]");
return 65535;
#undef TCHECK
}
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