/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

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

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

struct udphdr {
	uint16_t source;
	uint16_t dest;
	uint16_t len;
	uint16_t check;
} __packed;

static void udp(struct pkt_buff *pkt)
{
	struct udphdr *udp = (struct udphdr *) pkt_pull(pkt, sizeof(*udp));
	ssize_t len;
	uint16_t src, dest;
	char *src_name, *dest_name;

	if (udp == NULL)
		return;

	len = ntohs(udp->len) - sizeof(*udp);
	src = ntohs(udp->source);
	dest = ntohs(udp->dest);

	src_name = lookup_port_udp(src);
	dest_name = lookup_port_udp(dest);

	tprintf(" [ UDP ");
	tprintf("Port (%u", src);
	if (src_name)
		tprintf(" (%s%s%s)", colorize_start(bold), src_name,
			colorize_end());
	tprintf(" => %u", dest);
	if (dest_name)
		tprintf(" (%s%s%s)", colorize_start(bold), dest_name,
			colorize_end());
	tprintf("), ");
	if(len > pkt_len(pkt) || len < 0){
		tprintf("Len (%u) %s, ", ntohs(udp->len),
			colorize_start_full(black, red)
			"invalid" colorize_end());
	}
	tprintf("Len (%u Bytes, %zd Bytes Data), ", ntohs(udp->len), len);
	tprintf("CSum (0x%.4x)", ntohs(udp->check));
	tprintf(" ]\n");
}

static void udp_less(struct pkt_buff *pkt)
{
	struct udphdr *udp = (struct udphdr *) pkt_pull(pkt, sizeof(*udp));
	uint16_t src, dest;
	char *src_name, *dest_name;

	if (udp == NULL)
		return;

	src = ntohs(udp->source);
	dest = ntohs(udp->dest);

	src_name = lookup_port_udp(src);
	dest_name = lookup_port_udp(dest);

	tprintf(" UDP %u", src);
	if(src_name)
		tprintf("(%s%s%s)", colorize_start(bold), src_name,
			colorize_end());
	tprintf("/%u", dest);
	if (dest_name)
		tprintf("(%s%s%s)", colorize_start(bold), dest_name,
			colorize_end());
}

struct protocol udp_ops = {
	.key = 0x11,
	.print_full = udp,
	.print_less = udp_less,
};
ctive' href='/cgit.cgi/linux/net-next.git/commit/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/Makefile'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>Makefile</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='08a5bb2921e490939f78f38fd0d02858bb709942'/><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>Sebastian Siewior &lt;bigeasy@linutronix.de&gt;</td><td class='right'>2016-03-08 10:03:56 +0100</td></tr>
<tr><th>committer</th><td>Michael Ellerman &lt;mpe@ellerman.id.au&gt;</td><td class='right'>2016-03-29 12:08:07 +1100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>08a5bb2921e490939f78f38fd0d02858bb709942</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Makefile?id=08a5bb2921e490939f78f38fd0d02858bb709942'>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=08a5bb2921e490939f78f38fd0d02858bb709942'>69ffd3a4d483b216da03d54daca1cfc5a28b7615</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Makefile?h=packet-loop-back&amp;id=f55532a0c0b8bb6148f4e07853b876ef73bc69ca'>f55532a0c0b8bb6148f4e07853b876ef73bc69ca</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Makefile?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942&amp;id2=f55532a0c0b8bb6148f4e07853b876ef73bc69ca'>diff</a>)</td></tr></table>
<div class='commit-subject'>powerpc/mm: Fixup preempt underflow with huge pages</div><div class='commit-msg'>hugepd_free() used __get_cpu_var() once. Nothing ensured that the code
accessing the variable did not migrate from one CPU to another and soon
this was noticed by Tiejun Chen in 94b09d755462 ("powerpc/hugetlb:
Replace __get_cpu_var with get_cpu_var"). So we had it fixed.

Christoph Lameter was doing his __get_cpu_var() replaces and forgot
PowerPC. Then he noticed this and sent his fixed up batch again which
got applied as 69111bac42f5 ("powerpc: Replace __get_cpu_var uses").

The careful reader will noticed one little detail: get_cpu_var() got
replaced with this_cpu_ptr(). So now we have a put_cpu_var() which does
a preempt_enable() and nothing that does preempt_disable() so we
underflow the preempt counter.

Cc: Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;
Cc: Christoph Lameter &lt;cl@linux.com&gt;
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior &lt;bigeasy@linutronix.de&gt;
Reviewed-by: Aneesh Kumar K.V &lt;aneesh.kumar@linux.vnet.ibm.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=packet-loop-back&amp;id=08a5bb2921e490939f78f38fd0d02858bb709942'>Diffstat</a> (limited to 'Makefile')</div><table summary='diffstat' class='diffstat'>