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

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

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

struct dest_optshdr {
	uint8_t h_next_header;
	uint8_t hdr_len;
} __packed;


static void dissect_opt_dest(struct pkt_buff *pkt __maybe_unused,
			     ssize_t *opt_len)
{
	/* Have to been upgraded.
	 * http://tools.ietf.org/html/rfc2460#section-4.2
	 * Look also for proto_ipv6_hop_by_hop.h, it needs
	 * dissect_opt(), too.
	 */
	if (*opt_len)
		tprintf(", Option(s) recognized ");

	/* If adding dissector reduce opt_len for each using of pkt_pull
	 * to the same size.
	 */
}

static void dest_opts(struct pkt_buff *pkt)
{
	uint16_t hdr_ext_len;
	ssize_t opt_len;
	struct dest_optshdr *dest_ops;

	dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops));
	if (dest_ops == NULL)
		return;

	/* Total Header Length in Bytes */
	hdr_ext_len = (dest_ops->hdr_len + 1) * 8;
	/* Options length in Bytes */
	opt_len = hdr_ext_len - sizeof(*dest_ops);

	tprintf("\t [ Destination Options ");
	tprintf("NextHdr (%u), ", dest_ops->h_next_header);
	if (opt_len > pkt_len(pkt) || opt_len < 0) {
	      tprintf("HdrExtLen (%u, %u Bytes, %s)", dest_ops->hdr_len,
		    hdr_ext_len, colorize_start_full(black, red)
		    "invalid" colorize_end());
		    return;
	}
	tprintf("HdrExtLen (%u, %u Bytes)", dest_ops->hdr_len,
		hdr_ext_len);

	dissect_opt_dest(pkt, &opt_len);

	tprintf(" ]\n");

	pkt_pull(pkt, opt_len);
	pkt_set_dissector(pkt, &eth_lay3, dest_ops->h_next_header);
}

static void dest_opts_less(struct pkt_buff *pkt)
{
	uint16_t hdr_ext_len;
	ssize_t opt_len;
	struct dest_optshdr *dest_ops;

	dest_ops = (struct dest_optshdr *) pkt_pull(pkt, sizeof(*dest_ops));
	if (dest_ops == NULL)
		return;

	/* Total Header Length in Bytes */
	hdr_ext_len = (dest_ops->hdr_len + 1) * 8;
	/* Options length in Bytes */
	opt_len = hdr_ext_len - sizeof(*dest_ops);
	if (opt_len > pkt_len(pkt) || opt_len < 0)
		return;

	tprintf(" Dest Ops");

	pkt_pull(pkt, opt_len);
	pkt_set_dissector(pkt, &eth_lay3, dest_ops->h_next_header);
}

struct protocol ipv6_dest_opts_ops = {
	.key = 0x3C,
	.print_full = dest_opts,
	.print_less = dest_opts_less,
};
itter'>committer</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>asm-generic</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='a6da83f98267bc8ee4e34aa899169991eb0ceb93'/><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><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2014-01-13 10:59:05 +0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2014-01-13 10:59:05 +0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>a6da83f98267bc8ee4e34aa899169991eb0ceb93</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>84c228e0a87475dbdb0f72621c137cce8253131b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>include/asm-generic</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/asm-generic?id=061f49ec2d722f485237870f04544d8bec15a778'>061f49ec2d722f485237870f04544d8bec15a778</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93&amp;id2=061f49ec2d722f485237870f04544d8bec15a778'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/asm-generic?id=10348f5976830e5d8f74e8abb04a9a057a5e8478'>10348f5976830e5d8f74e8abb04a9a057a5e8478</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/asm-generic?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93&amp;id2=10348f5976830e5d8f74e8abb04a9a057a5e8478'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc</div><div class='commit-msg'>Pull powerpc fix from Ben Herrenschmidt:
 "Here's one regression fix for 3.13 that I would appreciate if you
  could still pull in.  It was an "interesting" one to debug, basically
  it's an old bug that got somewhat "exposed" by new code breaking the
  boot on PA Semi boards (yes, it does appear that some people are still
  using these!)"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Check return value of instance-to-package OF call
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a6da83f98267bc8ee4e34aa899169991eb0ceb93'>Diffstat</a> (limited to 'include/asm-generic')</div><table summary='diffstat' class='diffstat'>