M7350/external/compat-wireless/compat/compat-2.6.24.c
2024-09-09 08:57:42 +00:00

159 lines
4.4 KiB
C

/*
* Copyright 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Compatibility file for Linux wireless for kernels 2.6.24.
*/
#include <net/compat.h>
#include <net/arp.h>
/*
* We simply won't use it though, just declare it for our wrappers and
* for usage with tons of code that makes mention to it.
*/
struct net init_net;
EXPORT_SYMBOL(init_net);
/* 2.6.22 and 2.6.23 have eth_header_cache_update defined as extern in include/linux/etherdevice.h
* and actually defined in net/ethernet/eth.c but 2.6.24 exports it. Lets export it here */
/**
* eth_header_cache_update - update cache entry
* @hh: destination cache entry
* @dev: network device
* @haddr: new hardware address
*
* Called by Address Resolution module to notify changes in address.
*/
void eth_header_cache_update(struct hh_cache *hh,
struct net_device *dev,
unsigned char *haddr)
{
memcpy(((u8 *) hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
haddr, ETH_ALEN);
}
EXPORT_SYMBOL(eth_header_cache_update);
/* 2.6.22 and 2.6.23 have eth_header_cache defined as extern in include/linux/etherdevice.h
* and actually defined in net/ethernet/eth.c but 2.6.24 exports it. Lets export it here */
/**
* eth_header_cache - fill cache entry from neighbour
* @neigh: source neighbour
* @hh: destination cache entry
* Create an Ethernet header template from the neighbour.
*/
int eth_header_cache(struct neighbour *neigh, struct hh_cache *hh)
{
__be16 type = hh->hh_type;
struct ethhdr *eth;
const struct net_device *dev = neigh->dev;
eth = (struct ethhdr *)
(((u8 *) hh->hh_data) + (HH_DATA_OFF(sizeof(*eth))));
if (type == htons(ETH_P_802_3))
return -1;
eth->h_proto = type;
memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
memcpy(eth->h_dest, neigh->ha, ETH_ALEN);
hh->hh_len = ETH_HLEN;
return 0;
}
EXPORT_SYMBOL(eth_header_cache);
/* 2.6.22 and 2.6.23 have eth_header() defined as extern in include/linux/etherdevice.h
* and actually defined in net/ethernet/eth.c but 2.6.24 exports it. Lets export it here */
/**
* eth_header - create the Ethernet header
* @skb: buffer to alter
* @dev: source device
* @type: Ethernet type field
* @daddr: destination address (NULL leave destination address)
* @saddr: source address (NULL use device source address)
* @len: packet length (<= skb->len)
*
*
* Set the protocol type. For a packet of type ETH_P_802_3 we put the length
* in here instead. It is up to the 802.2 layer to carry protocol information.
*/
int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
void *daddr, void *saddr, unsigned len)
{
struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN);
if (type != ETH_P_802_3)
eth->h_proto = htons(type);
else
eth->h_proto = htons(len);
/*
* Set the source hardware address.
*/
if (!saddr)
saddr = dev->dev_addr;
memcpy(eth->h_source, saddr, dev->addr_len);
if (daddr) {
memcpy(eth->h_dest, daddr, dev->addr_len);
return ETH_HLEN;
}
/*
* Anyway, the loopback-device should never use this function...
*/
if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
memset(eth->h_dest, 0, dev->addr_len);
return ETH_HLEN;
}
return -ETH_HLEN;
}
EXPORT_SYMBOL(eth_header);
/* 2.6.22 and 2.6.23 have eth_rebuild_header defined as extern in include/linux/etherdevice.h
* and actually defined in net/ethernet/eth.c but 2.6.24 exports it. Lets export it here */
/**
* eth_rebuild_header- rebuild the Ethernet MAC header.
* @skb: socket buffer to update
*
* This is called after an ARP or IPV6 ndisc it's resolution on this
* sk_buff. We now let protocol (ARP) fill in the other fields.
*
* This routine CANNOT use cached dst->neigh!
* Really, it is used only when dst->neigh is wrong.
*/
int eth_rebuild_header(struct sk_buff *skb)
{
struct ethhdr *eth = (struct ethhdr *)skb->data;
struct net_device *dev = skb->dev;
switch (eth->h_proto) {
#ifdef CONFIG_INET
case __constant_htons(ETH_P_IP):
return arp_find(eth->h_dest, skb);
#endif
default:
printk(KERN_DEBUG
"%s: unable to resolve type %X addresses.\n",
dev->name, (int)eth->h_proto);
memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
break;
}
return 0;
}
EXPORT_SYMBOL(eth_rebuild_header);