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/*
* 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->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);
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