linux-stable/net/802/p8022.c
Paul Gortmaker 211ed86510 net: delete all instances of special processing for token ring
We are going to delete the Token ring support.  This removes any
special processing in the core networking for token ring, (aside
from net/tr.c itself), leaving the drivers and remaining tokenring
support present but inert.

The mass removal of the drivers and net/tr.c will be in a separate
commit, so that the history of these files that we still care
about won't have the giant deletion tied into their history.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-05-15 20:14:35 -04:00

66 lines
1.9 KiB
C

/*
* 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");