/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
 * Subject to the GPL, version 2.
 *
 * IP Authentication Header described in RFC4302
 */

#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 auth_hdr {
	uint8_t h_next_header;
	uint8_t h_payload_len;
	uint16_t h_reserved;
	uint32_t h_spi;
	uint32_t h_snf;
} __packed;

static void auth_hdr(struct pkt_buff *pkt)
{
	ssize_t hdr_len;
	size_t i;
	struct auth_hdr *auth_ops;

	auth_ops = (struct auth_hdr *) pkt_pull(pkt, sizeof(*auth_ops));
	if (auth_ops == NULL)
		return;

	hdr_len = (auth_ops->h_payload_len * 4) + 8;

	tprintf(" [ Authentication Header ");
	tprintf("NextHdr (%u), ", auth_ops->h_next_header);
	if (hdr_len > pkt_len(pkt) || hdr_len < 0){
		tprintf("HdrLen (%u, %zd Bytes %s), ",
		      auth_ops->h_payload_len, hdr_len,
		      colorize_start_full(black, red)
		      "invalid" colorize_end());
		      return;
	}
	tprintf("HdrLen (%u, %zd Bytes), ",auth_ops->h_payload_len, hdr_len);
	tprintf("Reserved (0x%x), ", ntohs(auth_ops->h_reserved));
	/* TODO
	 * Upgrade for Extended (64-bit) Sequence Number
	 * http://tools.ietf.org/html/rfc4302#section-2.5.1
	 */
	tprintf("SPI (0x%x), ", ntohl(auth_ops->h_spi));
	tprintf("SNF (0x%x), ", ntohl(auth_ops->h_snf));
	tprintf("ICV 0x");
	for (i = sizeof(struct auth_hdr); i < hdr_len; i++)
		tprintf("%02x", *pkt_pull(pkt, 1));
	tprintf(" ]\n");

	pkt_set_proto(pkt, &eth_lay3, auth_ops->h_next_header);
}

static void auth_hdr_less(struct pkt_buff *pkt)
{
  	ssize_t hdr_len;
	struct auth_hdr *auth_ops;

	auth_ops = (struct auth_hdr *) pkt_pull(pkt, sizeof(*auth_ops));
	if (auth_ops == NULL)
		return;

	hdr_len = (auth_ops->h_payload_len * 4) + 8;
	if (hdr_len > pkt_len(pkt) || hdr_len < 0)
		return;

	tprintf(" AH");

	pkt_pull(pkt, hdr_len - sizeof(*auth_ops));
	pkt_set_proto(pkt, &eth_lay3, auth_ops->h_next_header);
}

struct protocol ip_auth_ops = {
	.key = 0x33,
	.print_full = auth_hdr,
	.print_less = auth_hdr_less,
};
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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='a3f9d1b58a9ffce011ef4f074bfa36ae30eade28'/><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>Benjamin Coddington &lt;bcodding@redhat.com&gt;</td><td class='right'>2016-10-11 15:53:21 -0400</td></tr>
<tr><th>committer</th><td>Anna Schumaker &lt;Anna.Schumaker@Netapp.com&gt;</td><td class='right'>2016-10-13 16:42:53 -0400</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=a3f9d1b58a9ffce011ef4f074bfa36ae30eade28'>a3f9d1b58a9ffce011ef4f074bfa36ae30eade28</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=a3f9d1b58a9ffce011ef4f074bfa36ae30eade28'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=a3f9d1b58a9ffce011ef4f074bfa36ae30eade28'>3b835438b0bee423b97c5129de3d82da296aa25c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=3f807e5ae5597bd65a6fff684083e8eaa21f3fa7'>3f807e5ae5597bd65a6fff684083e8eaa21f3fa7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=a3f9d1b58a9ffce011ef4f074bfa36ae30eade28&amp;id2=3f807e5ae5597bd65a6fff684083e8eaa21f3fa7'>diff</a>)</td></tr></table>
<div class='commit-subject'>pnfs/blocklayout: fix last_write_offset incorrectly set to page boundary</div><div class='commit-msg'>Commit 41963c10c47a35185e68cb9049f7a3493c94d2d7 sets the block layout's
last written byte to the offset of the end of the extent rather than the
end of the write which incorrectly updates the inode's size for
partial-page writes.

Fixes: 41963c10c47a ("pnfs/blocklayout: update last_write_offset atomically with extents")
Signed-off-by: Benjamin Coddington &lt;bcodding@redhat.com&gt;
Reviewed-by: Christoph Hellwig &lt;hch@lst.de&gt;
Tested-by: Christoph Hellwig &lt;hch@lst.de&gt;
Cc: stable@vger.kernel.org # 4.8+
Signed-off-by: Anna Schumaker &lt;Anna.Schumaker@Netapp.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=a3f9d1b58a9ffce011ef4f074bfa36ae30eade28'>Diffstat</a></div><table summary='diffstat' class='diffstat'>