/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
 * Subject to the GPL, version 2.
 *
 * http://tools.ietf.org/html/rfc3032
 */

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

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

struct mpls_uchdr {
	uint32_t mpls_uc_hdr;
} __packed;

static int mpls_uc_next_proto(struct pkt_buff *pkt)
{
	uint8_t proto;
	uint16_t key = 0;

	if (pkt_len(pkt))
		proto = *(pkt->data);
	else
		return -EIO;

	/* FIXME: Right now only test for IP Version field */
	switch (proto >> 4) {
	case 4:
		key = 0x0800; /* IPv4*/
		break;
	case 6:
		key = 0x86DD; /* IPv6*/
		break;
	default:
		/* Nothing detected ... */
		return -ENOENT;
	}

	return key;
}

static void mpls_uc_full(struct pkt_buff *pkt)
{
	int next;
	uint32_t mpls_uc_data;
	struct mpls_uchdr *mpls_uc;
	uint8_t s = 0;

	do {
		mpls_uc = (struct mpls_uchdr *) pkt_pull(pkt, sizeof(*mpls_uc));
		if (mpls_uc == NULL)
			return;

		mpls_uc_data = ntohl(mpls_uc->mpls_uc_hdr);
		s = (mpls_uc_data >> 8) & 0x1;

		tprintf(" [ MPLS ");
		tprintf("Label (%u), ", mpls_uc_data >> 12);
		tprintf("Exp (%u), ", (mpls_uc_data >> 9) & 0x7);
		tprintf("S (%u), ", s);
		tprintf("TTL (%u)", (mpls_uc_data & 0xFF));
		tprintf(" ]\n");
	} while (!s);

	next = mpls_uc_next_proto(pkt);
	if (next < 0)
		return;

	pkt_set_proto(pkt, &eth_lay2, (uint16_t) next);
}

static void mpls_uc_less(struct pkt_buff *pkt)
{
	int next;
	uint32_t mpls_uc_data;
	struct mpls_uchdr *mpls_uc;
	uint8_t s = 0;

	do {
		mpls_uc = (struct mpls_uchdr *) pkt_pull(pkt, sizeof(*mpls_uc));
		if (mpls_uc == NULL)
			return;

		mpls_uc_data = ntohl(mpls_uc->mpls_uc_hdr);
		s = (mpls_uc_data >> 8) & 0x1;

		tprintf(" MPLS/%u", mpls_uc_data >> 12);
	} while (!s);

	next = mpls_uc_next_proto(pkt);
	if (next < 0)
		return;

	pkt_set_proto(pkt, &eth_lay2, (uint16_t) next);
}

struct protocol mpls_uc_ops = {
	.key = 0x8847,
	.print_full = mpls_uc_full,
	.print_less = mpls_uc_less,
};
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/kernel?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>kernel</a>/<a href='/cgit.cgi/linux/net-next.git/commit/kernel/user.c?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>user.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'/><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>Eric W. Biederman &lt;ebiederm@xmission.com&gt;</td><td class='right'>2012-08-30 01:24:05 -0700</td></tr>
<tr><th>committer</th><td>Eric W. Biederman &lt;ebiederm@xmission.com&gt;</td><td class='right'>2012-09-18 01:01:37 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/kernel/user.c?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>f76d207a66c3a53defea67e7d36c3eb1b7d6d61d</a> (<a href='/cgit.cgi/linux/net-next.git/patch/kernel/user.c?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>2d2a459c539d6f0b92e8ca856632e65f6c293af7</a> /<a href='/cgit.cgi/linux/net-next.git/tree/kernel/user.c?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>kernel/user.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/kernel/user.c?id=69552c0c50f3f950f304fb07a4320e46f7f60c21'>69552c0c50f3f950f304fb07a4320e46f7f60c21</a> (<a href='/cgit.cgi/linux/net-next.git/diff/kernel/user.c?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d&amp;id2=69552c0c50f3f950f304fb07a4320e46f7f60c21'>diff</a>)</td></tr></table>
<div class='commit-subject'>userns: Add kprojid_t and associated infrastructure in projid.h</div><div class='commit-msg'>Implement kprojid_t a cousin of the kuid_t and kgid_t.

The per user namespace mapping of project id values can be set with
/proc/&lt;pid&gt;/projid_map.

A full compliment of helpers is provided: make_kprojid, from_kprojid,
from_kprojid_munged, kporjid_has_mapping, projid_valid, projid_eq,
projid_eq, projid_lt.

Project identifiers are part of the generic disk quota interface,
although it appears only xfs implements project identifiers currently.

The xfs code allows anyone who has permission to set the project
identifier on a file to use any project identifier so when
setting up the user namespace project identifier mappings I do
not require a capability.

Cc: Dave Chinner &lt;david@fromorbit.com&gt;
Cc: Jan Kara &lt;jack@suse.cz&gt;
Signed-off-by: "Eric W. Biederman" &lt;ebiederm@xmission.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f76d207a66c3a53defea67e7d36c3eb1b7d6d61d'>Diffstat</a> (limited to 'kernel/user.c')</div><table summary='diffstat' class='diffstat'>