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#include "linux/kernel.h"
#include "linux/stddef.h"
#include "linux/init.h"
#include "linux/netdevice.h"
#include "linux/if_arp.h"
#include "net_kern.h"
#include "net_user.h"
#include "kern.h"
#include "slip.h"
struct slip_init {
char *gate_addr;
};
void slip_init(struct net_device *dev, void *data)
{
struct uml_net_private *private;
struct slip_data *spri;
struct slip_init *init = data;
private = dev->priv;
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->header_cache_update = NULL;
dev->hard_header_cache = NULL;
dev->hard_header = NULL;
dev->hard_header_len = 0;
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.raw, (*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));
}
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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