1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include "linux/stddef.h"
#include "linux/netdevice.h"
#include "linux/etherdevice.h"
#include "linux/skbuff.h"
#include "linux/init.h"
#include "asm/errno.h"
#include "net_kern.h"
#include "net_user.h"
#include "tuntap.h"
struct tuntap_init {
char *dev_name;
char *gate_addr;
};
static void tuntap_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct tuntap_data *tpri;
struct tuntap_init *init = data;
pri = dev->priv;
tpri = (struct tuntap_data *) pri->user;
tpri->dev_name = init->dev_name;
tpri->fixed_config = (init->dev_name != NULL);
tpri->gate_addr = init->gate_addr;
tpri->fd = -1;
tpri->dev = dev;
printk("TUN/TAP backend - ");
if (tpri->gate_addr != NULL)
printk("IP = %s", tpri->gate_addr);
printk("\n");
}
static int tuntap_read(int fd, struct sk_buff **skb,
struct uml_net_private *lp)
{
*skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
if(*skb == NULL) return(-ENOMEM);
return(net_read(fd, (*skb)->mac.raw,
(*skb)->dev->mtu + ETH_HEADER_OTHER));
}
static int tuntap_write(int fd, struct sk_buff **skb,
struct uml_net_private *lp)
{
return(net_write(fd, (*skb)->data, (*skb)->len));
}
const struct net_kern_info tuntap_kern_info = {
.init = tuntap_init,
.protocol = eth_protocol,
.read = tuntap_read,
.write = tuntap_write,
};
int tuntap_setup(char *str, char **mac_out, void *data)
{
struct tuntap_init *init = data;
*init = ((struct tuntap_init)
{ .dev_name = NULL,
.gate_addr = NULL });
if(tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
&init->gate_addr))
return(0);
return(1);
}
static struct transport tuntap_transport = {
.list = LIST_HEAD_INIT(tuntap_transport.list),
.name = "tuntap",
.setup = tuntap_setup,
.user = &tuntap_user_info,
.kern = &tuntap_kern_info,
.private_size = sizeof(struct tuntap_data),
.setup_size = sizeof(struct tuntap_init),
};
static int register_tuntap(void)
{
register_transport(&tuntap_transport);
return 0;
}
late_initcall(register_tuntap);
|
