/*
 * 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 "protos.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, 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_proto(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_proto(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,
};
et' action='/cgit.cgi/linux/net-next.git/log/Documentation/i2c/fault-codes'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/i2c?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>i2c</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>fault-codes</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'/><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'>2016-09-03 11:36:55 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-09-03 11:36:55 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>41488202f1afac2e7425cc4d4a3b4208c3e2cc8c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/i2c/fault-codes?id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>a5ccee1c7c95ec760b8abe3c6230a8adfee03c7f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>Documentation/i2c/fault-codes</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=018c81b827563c4d64ad79f9b90ea985a65bff4d'>018c81b827563c4d64ad79f9b90ea985a65bff4d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c&amp;id2=018c81b827563c4d64ad79f9b90ea985a65bff4d'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=17d0774f80681020eccc9638d925a23f1fc4f671'>17d0774f80681020eccc9638d925a23f1fc4f671</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/i2c/fault-codes?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c&amp;id2=17d0774f80681020eccc9638d925a23f1fc4f671'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core</div><div class='commit-msg'>Pull driver core fixes from Greg KH:
 "Here are three small fixes for 4.8-rc5.

  One for sysfs, one for kernfs, and one documentation fix, all for
  reported issues.  All of these have been in linux-next for a while"

* tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  sysfs: correctly handle read offset on PREALLOC attrs
  documentation: drivers/core/of: fix name of of_node symlink
  kernfs: don't depend on d_find_any_alias() when generating notifications
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=41488202f1afac2e7425cc4d4a3b4208c3e2cc8c'>Diffstat</a> (limited to 'Documentation/i2c/fault-codes')</div><table summary='diffstat' class='diffstat'>