2 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL.
6 #include <linux/if_arp.h>
7 #include <linux/init.h>
8 #include <linux/netdevice.h>
16 void slip_init(struct net_device *dev, void *data)
18 struct uml_net_private *private;
19 struct slip_data *spri;
20 struct slip_init *init = data;
23 spri = (struct slip_data *) private->user;
25 memset(spri->name, 0, sizeof(spri->name));
27 spri->gate_addr = init->gate_addr;
31 slip_proto_init(&spri->slip);
34 dev->header_cache_update = NULL;
35 dev->hard_header_cache = NULL;
36 dev->hard_header = NULL;
37 dev->hard_header_len = 0;
39 dev->type = ARPHRD_SLIP;
40 dev->tx_queue_len = 256;
41 dev->flags = IFF_NOARP;
42 printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
45 static unsigned short slip_protocol(struct sk_buff *skbuff)
47 return htons(ETH_P_IP);
50 static int slip_read(int fd, struct sk_buff **skb,
51 struct uml_net_private *lp)
53 return slip_user_read(fd, skb_mac_header(*skb), (*skb)->dev->mtu,
54 (struct slip_data *) &lp->user);
57 static int slip_write(int fd, struct sk_buff **skb,
58 struct uml_net_private *lp)
60 return slip_user_write(fd, (*skb)->data, (*skb)->len,
61 (struct slip_data *) &lp->user);
64 const struct net_kern_info slip_kern_info = {
66 .protocol = slip_protocol,
71 static int slip_setup(char *str, char **mac_out, void *data)
73 struct slip_init *init = data;
75 *init = ((struct slip_init) { .gate_addr = NULL });
78 init->gate_addr = str;
82 static struct transport slip_transport = {
83 .list = LIST_HEAD_INIT(slip_transport.list),
86 .user = &slip_user_info,
87 .kern = &slip_kern_info,
88 .private_size = sizeof(struct slip_data),
89 .setup_size = sizeof(struct slip_init),
92 static int register_slip(void)
94 register_transport(&slip_transport);
98 late_initcall(register_slip);