/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

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

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

struct icmphdr {
	uint8_t type;
	uint8_t code;
	uint16_t checksum;
	union {
		struct {
			uint16_t id;
			uint16_t sequence;
		} echo;
		uint32_t gateway;
		struct {
			uint16_t ____unused;
			uint16_t mtu;
		} frag;
	} un;
} __packed;

static void icmp(struct pkt_buff *pkt)
{
	struct icmphdr *icmp = (struct icmphdr *) pkt_pull(pkt, sizeof(*icmp));
	uint16_t csum;

	if (icmp == NULL)
		return;

	csum = calc_csum(icmp, pkt_len(pkt) + sizeof(*icmp), 0);

	tprintf(" [ ICMP ");
	tprintf("Type (%u), ", icmp->type);
	tprintf("Code (%u), ", icmp->code);
	tprintf("CSum (0x%.4x) is %s", ntohs(icmp->checksum),
		csum ? colorize_start_full(black, red) "bogus (!)"
		       colorize_end() : "ok");
	tprintf(" ]\n");
}

static void icmp_less(struct pkt_buff *pkt)
{
	struct icmphdr *icmp = (struct icmphdr *) pkt_pull(pkt, sizeof(*icmp));

	if (icmp == NULL)
		return;

	tprintf(" Type %u Code %u", icmp->type, icmp->code);
}

struct protocol icmpv4_ops = {
	.key = 0x01,
	.print_full = icmp,
	.print_less = icmp_less,
};
ket-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/.mailmap'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/.mailmap?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/.mailmap?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d'>commit</a><a class='active' href='/cgit.cgi/linux/net-next.git/diff/.mailmap?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d&amp;id2=d09960b0032174eb493c4c13be5b9c9ef36dc9a7'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/.mailmap'>
<input type='hidden' name='id' value='937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d'/><input type='hidden' name='id2' value='d09960b0032174eb493c4c13be5b9c9ef36dc9a7'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d&amp;id2=d09960b0032174eb493c4c13be5b9c9ef36dc9a7'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/.mailmap?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d&amp;id2=d09960b0032174eb493c4c13be5b9c9ef36dc9a7'>.mailmap</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d'/><input type='hidden' name='id2' value='d09960b0032174eb493c4c13be5b9c9ef36dc9a7'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d&amp;id2=d09960b0032174eb493c4c13be5b9c9ef36dc9a7'>Diffstat</a> (limited to '.mailmap')</div><table summary='diffstat' class='diffstat'>