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
|
/*
* Copyright (C) 2002 Jeff Dike <jdike@karaya.com>
* Licensed under the GPL.
*/
#include "linux/init.h"
#include "linux/netdevice.h"
#include "linux/etherdevice.h"
#include "net_kern.h"
#include "net_user.h"
#include "pcap_user.h"
struct pcap_init {
char *host_if;
int promisc;
int optimize;
char *filter;
};
void pcap_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct pcap_data *ppri;
struct pcap_init *init = data;
pri = dev->priv;
ppri = (struct pcap_data *) pri->user;
ppri->host_if = init->host_if;
ppri->promisc = init->promisc;
ppri->optimize = init->optimize;
ppri->filter = init->filter;
}
static int pcap_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(pcap_user_read(fd, skb_mac_header(*skb),
(*skb)->dev->mtu + ETH_HEADER_OTHER,
(struct pcap_data *) &lp->user));
}
static int pcap_write(int fd, struct sk_buff **skb, struct uml_net_private *lp)
{
return(-EPERM);
}
static const struct net_kern_info pcap_kern_info = {
.init = pcap_init,
.protocol = eth_protocol,
.read = pcap_read,
.write = pcap_write,
};
int pcap_setup(char *str, char **mac_out, void *data)
{
struct pcap_init *init = data;
char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
int i;
*init = ((struct pcap_init)
{ .host_if = "eth0",
.promisc = 1,
.optimize = 0,
.filter = NULL });
remain = split_if_spec(str, &host_if, &init->filter,
&options[0], &options[1], NULL);
if(remain != NULL){
printk(KERN_ERR "pcap_setup - Extra garbage on "
"specification : '%s'\n", remain);
return(0);
}
if(host_if != NULL)
init->host_if = host_if;
for(i = 0; i < ARRAY_SIZE(options); i++){
if(options[i] == NULL)
continue;
if(!strcmp(options[i], "promisc"))
init->promisc = 1;
else if(!strcmp(options[i], "nopromisc"))
init->promisc = 0;
else if(!strcmp(options[i], "optimize"))
init->optimize = 1;
else if(!strcmp(options[i], "nooptimize"))
init->optimize = 0;
else printk("pcap_setup : bad option - '%s'\n", options[i]);
}
return(1);
}
static struct transport pcap_transport = {
.list = LIST_HEAD_INIT(pcap_transport.list),
.name = "pcap",
.setup = pcap_setup,
.user = &pcap_user_info,
.kern = &pcap_kern_info,
.private_size = sizeof(struct pcap_data),
.setup_size = sizeof(struct pcap_init),
};
static int register_pcap(void)
{
register_transport(&pcap_transport);
return 0;
}
late_initcall(register_pcap);
|
