95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL.
|
|
*/
|
|
|
|
#include <linux/if_arp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/netdevice.h>
|
|
#include "net_kern.h"
|
|
#include "slip.h"
|
|
|
|
struct slip_init {
|
|
char *gate_addr;
|
|
};
|
|
|
|
static void slip_init(struct net_device *dev, void *data)
|
|
{
|
|
struct uml_net_private *private;
|
|
struct slip_data *spri;
|
|
struct slip_init *init = data;
|
|
|
|
private = netdev_priv(dev);
|
|
spri = (struct slip_data *) private->user;
|
|
|
|
memset(spri->name, 0, sizeof(spri->name));
|
|
spri->addr = NULL;
|
|
spri->gate_addr = init->gate_addr;
|
|
spri->slave = -1;
|
|
spri->dev = dev;
|
|
|
|
slip_proto_init(&spri->slip);
|
|
|
|
dev->init = NULL;
|
|
dev->hard_header_len = 0;
|
|
dev->header_ops = NULL;
|
|
dev->addr_len = 0;
|
|
dev->type = ARPHRD_SLIP;
|
|
dev->tx_queue_len = 256;
|
|
dev->flags = IFF_NOARP;
|
|
printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
|
|
}
|
|
|
|
static unsigned short slip_protocol(struct sk_buff *skbuff)
|
|
{
|
|
return htons(ETH_P_IP);
|
|
}
|
|
|
|
static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
|
|
(struct slip_data *) &lp->user);
|
|
}
|
|
|
|
static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
|
|
{
|
|
return slip_user_write(fd, skb->data, skb->len,
|
|
(struct slip_data *) &lp->user);
|
|
}
|
|
|
|
static const struct net_kern_info slip_kern_info = {
|
|
.init = slip_init,
|
|
.protocol = slip_protocol,
|
|
.read = slip_read,
|
|
.write = slip_write,
|
|
};
|
|
|
|
static int slip_setup(char *str, char **mac_out, void *data)
|
|
{
|
|
struct slip_init *init = data;
|
|
|
|
*init = ((struct slip_init) { .gate_addr = NULL });
|
|
|
|
if (str[0] != '\0')
|
|
init->gate_addr = str;
|
|
return 1;
|
|
}
|
|
|
|
static struct transport slip_transport = {
|
|
.list = LIST_HEAD_INIT(slip_transport.list),
|
|
.name = "slip",
|
|
.setup = slip_setup,
|
|
.user = &slip_user_info,
|
|
.kern = &slip_kern_info,
|
|
.private_size = sizeof(struct slip_data),
|
|
.setup_size = sizeof(struct slip_init),
|
|
};
|
|
|
|
static int register_slip(void)
|
|
{
|
|
register_transport(&slip_transport);
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(register_slip);
|