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Phonet: provide MAC header operations 

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Remi Denis-Courmont 2008-09-22 20:08:04 -07:00 committed by David S. Miller
parent 107d0d9b8d
commit 5f77076d75
2 changed files with 33 additions and 0 deletions
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4
include/linux/if_phonet.h
View File

@ -12,3 +12,7 @@
/* 6 bytes header + 65535 bytes payload */
#define PHONET_MAX_MTU 65541
#define PHONET_DEV_MTU PHONET_MAX_MTU
#ifdef __KERNEL__
extern struct header_ops phonet_header_ops;
#endif

29
net/phonet/af_phonet.c
View File

@ -99,6 +99,35 @@ static struct net_proto_family phonet_proto_family = {
.owner = THIS_MODULE,
};
/* Phonet device header operations */
static int pn_header_create(struct sk_buff *skb, struct net_device *dev,
unsigned short type, const void *daddr,
const void *saddr, unsigned len)
{
u8 *media = skb_push(skb, 1);
if (type != ETH_P_PHONET)
return -1;
if (!saddr)
saddr = dev->dev_addr;
*media = *(const u8 *)saddr;
return 1;
}
static int pn_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
const u8 *media = skb_mac_header(skb);
*haddr = *media;
return 1;
}
struct header_ops phonet_header_ops = {
.create = pn_header_create,
.parse = pn_header_parse,
};
EXPORT_SYMBOL(phonet_header_ops);
/*
* Prepends an ISI header and sends a datagram.
*/