/*
 *	NET3:	Support for 802.2 demultiplexing off Ethernet
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 *		Demultiplex 802.2 encoded protocols. We match the entry by the
 *		SSAP/DSAP pair and then deliver to the registered datalink that
 *		matches. The control byte is ignored and handling of such items
 *		is up to the routine passed the frame.
 *
 *		Unlike the 802.3 datalink we have a list of 802.2 entries as
 *		there are multiple protocols to demux. The list is currently
 *		short (3 or 4 entries at most). The current demux assumes this.
 */
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <net/datalink.h>
#include <linux/mm.h>
#include <linux/in.h>
#include <linux/init.h>
#include <net/llc.h>
#include <net/p8022.h>

static int p8022_request(struct datalink_proto *dl, struct sk_buff *skb,
			 unsigned char *dest)
{
	llc_build_and_send_ui_pkt(dl->sap, skb, dest, dl->sap->laddr.lsap);
	return 0;
}

struct datalink_proto *register_8022_client(unsigned char type,
					    int (*func)(struct sk_buff *skb,
							struct net_device *dev,
							struct packet_type *pt,
							struct net_device *orig_dev))
{
	struct datalink_proto *proto;

	proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
	if (proto) {
		proto->type[0]		= type;
		proto->header_length	= 3;
		proto->request		= p8022_request;
		proto->sap = llc_sap_open(type, func);
		if (!proto->sap) {
			kfree(proto);
			proto = NULL;
		}
	}
	return proto;
}

void unregister_8022_client(struct datalink_proto *proto)
{
	llc_sap_put(proto->sap);
	kfree(proto);
}

EXPORT_SYMBOL(register_8022_client);
EXPORT_SYMBOL(unregister_8022_client);

MODULE_LICENSE("GPL");
ref='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/gadget/usbstring.c'>
<input type='hidden' name='id' value='9a393b5d5988ea4eaa3e0da138321abe0dc03a68'/><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/?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>gadget</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>usbstring.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='9a393b5d5988ea4eaa3e0da138321abe0dc03a68'/><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>Sainath Grandhi &lt;sainath.grandhi@intel.com&gt;</td><td class='right'>2017-02-10 16:03:51 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-11 20:59:41 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>9a393b5d5988ea4eaa3e0da138321abe0dc03a68</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>5a006ee32965ff9c76984aa7ce7c870d966be7ac</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>drivers/usb/gadget/usbstring.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/gadget/usbstring.c?id=d9f1f61c0801a73ff36d416a7ede54229b231e1d'>d9f1f61c0801a73ff36d416a7ede54229b231e1d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/gadget/usbstring.c?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68&amp;id2=d9f1f61c0801a73ff36d416a7ede54229b231e1d'>diff</a>)</td></tr></table>
<div class='commit-subject'>tap: tap as an independent module</div><div class='commit-msg'>This patch makes tap a separate module for other types of virtual interfaces, for example,
ipvlan to use.

Signed-off-by: Sainath Grandhi &lt;sainath.grandhi@intel.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/?id=9a393b5d5988ea4eaa3e0da138321abe0dc03a68'>Diffstat</a> (limited to 'drivers/usb/gadget/usbstring.c')</div><table summary='diffstat' class='diffstat'>