linux-hardened/net/802/p8023.c
Stephen Hemminger 0c4e85813d [NET]: Wrap netdevice hardware header creation.
Add inline for common usage of hardware header creation, and
fix bug in IPV6 mcast where the assumption about negative return is
an errno. Negative return from hard_header means not enough space
was available,(ie -N bytes).

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:52:50 -07:00

63 lines
1.6 KiB
C

/*
* NET3: 802.3 data link hooks used for IPX 802.3
*
* 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.
*
* 802.3 isn't really a protocol data link layer. Some old IPX stuff
* uses it however. Note that there is only one 802.3 protocol layer
* in the system. We don't currently support different protocols
* running raw 802.3 on different devices. Thankfully nobody else
* has done anything like the old IPX.
*/
#include <linux/in.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/datalink.h>
#include <net/p8022.h>
/*
* Place an 802.3 header on a packet. The driver will do the mac
* addresses, we just need to give it the buffer length.
*/
static int p8023_request(struct datalink_proto *dl,
struct sk_buff *skb, unsigned char *dest_node)
{
struct net_device *dev = skb->dev;
dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
return dev_queue_xmit(skb);
}
/*
* Create an 802.3 client. Note there can be only one 802.3 client
*/
struct datalink_proto *make_8023_client(void)
{
struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
if (proto) {
proto->header_length = 0;
proto->request = p8023_request;
}
return proto;
}
/*
* Destroy the 802.3 client.
*/
void destroy_8023_client(struct datalink_proto *dl)
{
kfree(dl);
}
EXPORT_SYMBOL(destroy_8023_client);
EXPORT_SYMBOL(make_8023_client);
MODULE_LICENSE("GPL");