98e399f82a
For the places where we need a pointer to the mac header, it is still legal to touch skb->mac.raw directly if just adding to, subtracting from or setting it to another layer header. This one also converts some more cases to skb_reset_mac_header() that my regex missed as it had no spaces before nor after '=', ugh. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/stddef.h"
|
|
#include "linux/netdevice.h"
|
|
#include "linux/etherdevice.h"
|
|
#include "linux/skbuff.h"
|
|
#include "linux/init.h"
|
|
#include "asm/errno.h"
|
|
#include "net_kern.h"
|
|
#include "net_user.h"
|
|
#include "tuntap.h"
|
|
|
|
struct tuntap_init {
|
|
char *dev_name;
|
|
char *gate_addr;
|
|
};
|
|
|
|
static void tuntap_init(struct net_device *dev, void *data)
|
|
{
|
|
struct uml_net_private *pri;
|
|
struct tuntap_data *tpri;
|
|
struct tuntap_init *init = data;
|
|
|
|
pri = dev->priv;
|
|
tpri = (struct tuntap_data *) pri->user;
|
|
tpri->dev_name = init->dev_name;
|
|
tpri->fixed_config = (init->dev_name != NULL);
|
|
tpri->gate_addr = init->gate_addr;
|
|
tpri->fd = -1;
|
|
tpri->dev = dev;
|
|
|
|
printk("TUN/TAP backend - ");
|
|
if (tpri->gate_addr != NULL)
|
|
printk("IP = %s", tpri->gate_addr);
|
|
printk("\n");
|
|
}
|
|
|
|
static int tuntap_read(int fd, struct sk_buff **skb,
|
|
struct uml_net_private *lp)
|
|
{
|
|
*skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
|
|
if(*skb == NULL) return(-ENOMEM);
|
|
return(net_read(fd, skb_mac_header(*skb),
|
|
(*skb)->dev->mtu + ETH_HEADER_OTHER));
|
|
}
|
|
|
|
static int tuntap_write(int fd, struct sk_buff **skb,
|
|
struct uml_net_private *lp)
|
|
{
|
|
return(net_write(fd, (*skb)->data, (*skb)->len));
|
|
}
|
|
|
|
const struct net_kern_info tuntap_kern_info = {
|
|
.init = tuntap_init,
|
|
.protocol = eth_protocol,
|
|
.read = tuntap_read,
|
|
.write = tuntap_write,
|
|
};
|
|
|
|
int tuntap_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct tuntap_init *init = data;
|
|
|
|
*init = ((struct tuntap_init)
|
|
{ .dev_name = NULL,
|
|
.gate_addr = NULL });
|
|
if(tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
|
|
&init->gate_addr))
|
|
return(0);
|
|
|
|
return(1);
|
|
}
|
|
|
|
static struct transport tuntap_transport = {
|
|
.list = LIST_HEAD_INIT(tuntap_transport.list),
|
|
.name = "tuntap",
|
|
.setup = tuntap_setup,
|
|
.user = &tuntap_user_info,
|
|
.kern = &tuntap_kern_info,
|
|
.private_size = sizeof(struct tuntap_data),
|
|
.setup_size = sizeof(struct tuntap_init),
|
|
};
|
|
|
|
static int register_tuntap(void)
|
|
{
|
|
register_transport(&tuntap_transport);
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(register_tuntap);
|