/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
 * Subject to the GPL, version 2.
 *
 * IPv6 Fragmentation Header described in RFC2460
 */

#include <stdio.h>
#include <stdint.h>
#include <netinet/in.h>    /* for ntohs() */

#include "proto.h"
#include "protos.h"
#include "dissector_eth.h"
#include "built_in.h"
#include "pkt_buff.h"

struct fragmhdr {
	uint8_t h_fragm_next_header;
	uint8_t h_fragm_reserved;
	uint16_t h_fragm_off_res_M;	
	uint32_t h_fragm_identification;
} __packed;

static void fragm(struct pkt_buff *pkt)
{
	uint16_t off_res_M;
	struct fragmhdr *fragm_ops;

	fragm_ops = (struct fragmhdr *) pkt_pull(pkt, sizeof(*fragm_ops));
	if (fragm_ops == NULL)
		return;

	off_res_M = ntohs(fragm_ops->h_fragm_off_res_M);
	
	tprintf("\t [ Fragment ");
	tprintf("NextHdr (%u), ", fragm_ops->h_fragm_next_header);
	tprintf("Reserved (%u), ", fragm_ops->h_fragm_reserved);
	tprintf("Offset (%u), ", off_res_M >> 3);
	tprintf("Res (%u), ", (off_res_M >> 1) & 0x3);
	tprintf("M flag (%u), ", off_res_M & 0x1);
	tprintf("Identification (%u)",
		ntohl(fragm_ops->h_fragm_identification));
	tprintf(" ]\n");

	pkt_set_proto(pkt, &eth_lay3, fragm_ops->h_fragm_next_header);
}

static void fragm_less(struct pkt_buff *pkt)
{
	uint16_t off_res_M;
	struct fragmhdr *fragm_ops;

	fragm_ops = (struct fragmhdr *) pkt_pull(pkt, sizeof(*fragm_ops));
	if (fragm_ops == NULL)
		return;

	off_res_M = ntohs(fragm_ops->h_fragm_off_res_M);

	tprintf(" FragmOffs %u", off_res_M >> 3);

	pkt_set_proto(pkt, &eth_lay3, fragm_ops->h_fragm_next_header);
}

struct protocol ipv6_fragm_ops = {
	.key = 0x2C,
	.print_full = fragm,
	.print_less = fragm_less,
};
gi/linux/net-next.git/log/sound/isa/ad1816a?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/isa/ad1816a?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/isa/ad1816a?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/isa/ad1816a?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/isa/ad1816a'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/isa?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>isa</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/isa/ad1816a?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43'>ad1816a</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/isa/ad1816a?h=nds-private-remove&amp;id=c325b3533730016ca5cdaf902d62550b4243fe43&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>