/*
 * 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++) {
		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_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,
};
0da6665a517945c95fc895'/><select name='qt'>
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<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='732a59cb6e7faed7a40da6665a517945c95fc895'/><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>Thomas Richter &lt;tmricht@linux.vnet.ibm.com&gt;</td><td class='right'>2016-09-15 14:39:27 +0200</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2016-09-16 04:29:14 -0400</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=packet-loop-back&amp;id=732a59cb6e7faed7a40da6665a517945c95fc895'>732a59cb6e7faed7a40da6665a517945c95fc895</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=732a59cb6e7faed7a40da6665a517945c95fc895'>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=732a59cb6e7faed7a40da6665a517945c95fc895'>be89253d289b616f1a146ecf11b5db3461784237</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=packet-loop-back&amp;id=5722963a8e83309dad831cf6968c4c805aa342c0'>5722963a8e83309dad831cf6968c4c805aa342c0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=packet-loop-back&amp;id=732a59cb6e7faed7a40da6665a517945c95fc895&amp;id2=5722963a8e83309dad831cf6968c4c805aa342c0'>diff</a>)</td></tr></table>
<div class='commit-subject'>s390/qeth: fix setting VIPA address</div><div class='commit-msg'>commit 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback")
restructured the internal address handling.
This work broke setting a virtual IP address.
The command
echo 10.1.1.1 &gt; /sys/bus/ccwgroup/devices/&lt;device&gt;/vipa/add4
fails with file exist error even if the IP address has not
been set before.

It turned out that the search result for the IP address
search is handled incorrectly in the VIPA case.

This patch fixes the setting of an virtual IP address.

Signed-off-by: Thomas Richter &lt;tmricht@linux.vnet.ibm.com&gt;
Signed-off-by: Ursula Braun &lt;ubraun@linux.vnet.ibm.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=packet-loop-back&amp;id=732a59cb6e7faed7a40da6665a517945c95fc895'>Diffstat</a></div><table summary='diffstat' class='diffstat'>