blob: dd2aadc14af0ab6768723bc8fbade09e6c3203b3 [file] [log] [blame]
Jeff Dikecd1ae0e2007-10-16 01:27:29 -07001/*
2 * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL.
4 */
5
6#include <linux/if_arp.h>
7#include <linux/init.h>
8#include <linux/netdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include "net_kern.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include "slip.h"
11
12struct slip_init {
13 char *gate_addr;
14};
15
WANG Cong074a0db2008-04-28 02:13:57 -070016static void slip_init(struct net_device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070017{
18 struct uml_net_private *private;
19 struct slip_data *spri;
20 struct slip_init *init = data;
21
Wang Chen17c324f2008-12-04 15:07:33 -080022 private = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 spri = (struct slip_data *) private->user;
Paolo 'Blaisorblade' Giarrusso854e9812006-02-01 03:06:25 -080024
25 memset(spri->name, 0, sizeof(spri->name));
26 spri->addr = NULL;
27 spri->gate_addr = init->gate_addr;
28 spri->slave = -1;
29 spri->dev = dev;
30
31 slip_proto_init(&spri->slip);
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 dev->hard_header_len = 0;
Jeff Dikebe8ad5a2007-10-17 19:35:04 -070034 dev->header_ops = NULL;
Jeff Dikea3c77c62005-06-13 15:52:18 -070035 dev->addr_len = 0;
36 dev->type = ARPHRD_SLIP;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 dev->tx_queue_len = 256;
38 dev->flags = IFF_NOARP;
39 printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
40}
41
42static unsigned short slip_protocol(struct sk_buff *skbuff)
43{
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070044 return htons(ETH_P_IP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}
46
Jeff Dikeb53f35a2007-10-16 01:27:31 -070047static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048{
Jeff Dikeb53f35a2007-10-16 01:27:31 -070049 return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070050 (struct slip_data *) &lp->user);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051}
52
Jeff Dikeb53f35a2007-10-16 01:27:31 -070053static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
Jeff Dikeb53f35a2007-10-16 01:27:31 -070055 return slip_user_write(fd, skb->data, skb->len,
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070056 (struct slip_data *) &lp->user);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057}
58
WANG Cong074a0db2008-04-28 02:13:57 -070059static const struct net_kern_info slip_kern_info = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 .init = slip_init,
61 .protocol = slip_protocol,
62 .read = slip_read,
63 .write = slip_write,
64};
65
66static int slip_setup(char *str, char **mac_out, void *data)
67{
68 struct slip_init *init = data;
69
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070070 *init = ((struct slip_init) { .gate_addr = NULL });
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070072 if (str[0] != '\0')
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 init->gate_addr = str;
Jeff Dikecd1ae0e2007-10-16 01:27:29 -070074 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075}
76
77static struct transport slip_transport = {
78 .list = LIST_HEAD_INIT(slip_transport.list),
79 .name = "slip",
80 .setup = slip_setup,
81 .user = &slip_user_info,
82 .kern = &slip_kern_info,
83 .private_size = sizeof(struct slip_data),
84 .setup_size = sizeof(struct slip_init),
85};
86
87static int register_slip(void)
88{
89 register_transport(&slip_transport);
Jeff Dikef4c57a72006-03-31 02:30:10 -080090 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091}
92
Jeff Dike8210fd22006-12-06 20:34:55 -080093late_initcall(register_slip);