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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
#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 "slirp.h"
struct slirp_init {
struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
};
void slirp_init(struct net_device *dev, void *data)
{
struct uml_net_private *private;
struct slirp_data *spri;
struct slirp_init *init = data;
int i;
private = dev->priv;
spri = (struct slirp_data *) private->user;
spri->argw = init->argw;
spri->pid = -1;
spri->slave = -1;
spri->dev = dev;
slip_proto_init(&spri->slip);
dev->init = NULL;
dev->hard_header_len = 0;
dev->header_cache_update = NULL;
dev->hard_header_cache = NULL;
dev->hard_header = NULL;
dev->addr_len = 0;
dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 256;
dev->flags = IFF_NOARP;
printk("SLIRP backend - command line:");
for(i=0;spri->argw.argv[i]!=NULL;i++) {
printk(" '%s'",spri->argw.argv[i]);
}
printk("\n");
}
static unsigned short slirp_protocol(struct sk_buff *skbuff)
{
return(htons(ETH_P_IP));
}
static int slirp_read(int fd, struct sk_buff **skb,
struct uml_net_private *lp)
{
return(slirp_user_read(fd, (*skb)->mac.raw, (*skb)->dev->mtu,
(struct slirp_data *) &lp->user));
}
static int slirp_write(int fd, struct sk_buff **skb,
struct uml_net_private *lp)
{
return(slirp_user_write(fd, (*skb)->data, (*skb)->len,
(struct slirp_data *) &lp->user));
}
struct net_kern_info slirp_kern_info = {
.init = slirp_init,
.protocol = slirp_protocol,
.read = slirp_read,
.write = slirp_write,
};
static int slirp_setup(char *str, char **mac_out, void *data)
{
struct slirp_init *init = data;
int i=0;
*init = ((struct slirp_init)
{ .argw = { { "slirp", NULL } } });
str = split_if_spec(str, mac_out, NULL);
if(str == NULL) { /* no command line given after MAC addr */
return(1);
}
do {
if(i>=SLIRP_MAX_ARGS-1) {
printk("slirp_setup: truncating slirp arguments\n");
break;
}
init->argw.argv[i++] = str;
while(*str && *str!=',') {
if(*str=='_') *str=' ';
str++;
}
if(*str!=',')
break;
*str++='\0';
} while(1);
init->argw.argv[i]=NULL;
return(1);
}
static struct transport slirp_transport = {
.list = LIST_HEAD_INIT(slirp_transport.list),
.name = "slirp",
.setup = slirp_setup,
.user = &slirp_user_info,
.kern = &slirp_kern_info,
.private_size = sizeof(struct slirp_data),
.setup_size = sizeof(struct slirp_init),
};
static int register_slirp(void)
{
register_transport(&slirp_transport);
return 0;
}
__initcall(register_slirp);
|
