/*
 * 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 "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)
{
	size_t i, 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;

	tprintf(" [ Authentication Header ");
	tprintf("NextHdr (%u), ", auth_ops->h_next_header);
	if (hdr_len > pkt_len(pkt)) {
		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++) {
		uint8_t *data = pkt_pull(pkt, 1);

		if (data == NULL) {
			tprintf("%sinvalid%s", colorize_start_full(black, red),
				colorize_end());
			break;
		}

		tprintf("%02x", *data);
	}
	tprintf(" ]\n");

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

struct protocol ip_auth_ops = {
	.key = 0x33,
	.print_full = auth_hdr,
	.print_less = auth_hdr_less,
};
ion'>
<input type='hidden' name='h' value='packet-loop-back'/><input type='hidden' name='id' value='99ec269779f1fde25356e14299419551cdb54443'/><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/commit/?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>Documentation</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='packet-loop-back'/><input type='hidden' name='id' value='99ec269779f1fde25356e14299419551cdb54443'/><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>Geliang Tang &lt;geliangtang@163.com&gt;</td><td class='right'>2016-03-13 15:26:29 +0800</td></tr>
<tr><th>committer</th><td>Ilya Dryomov &lt;idryomov@gmail.com&gt;</td><td class='right'>2016-03-25 18:51:56 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>99ec269779f1fde25356e14299419551cdb54443</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=99ec269779f1fde25356e14299419551cdb54443'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>7c440ee9ddd489d406174875a2aad9c8f4452cb1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=packet-loop-back&amp;id=03d9440676163e965cb77d03c102b461d8ccb482'>03d9440676163e965cb77d03c102b461d8ccb482</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443&amp;id2=03d9440676163e965cb77d03c102b461d8ccb482'>diff</a>)</td></tr></table>
<div class='commit-subject'>ceph: use kmem_cache_zalloc</div><div class='commit-msg'>Use kmem_cache_zalloc() instead of kmem_cache_alloc() with flag GFP_ZERO.

Signed-off-by: Geliang Tang &lt;geliangtang@163.com&gt;
Signed-off-by: Ilya Dryomov &lt;idryomov@gmail.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=packet-loop-back&amp;id=99ec269779f1fde25356e14299419551cdb54443'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>