Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / arch / um / drivers / pcap_kern.c
1 /*
2  * Copyright (C) 2002 Jeff Dike <jdike@karaya.com>
3  * Licensed under the GPL.
4  */
5
6 #include "linux/init.h"
7 #include "linux/netdevice.h"
8 #include "linux/etherdevice.h"
9 #include "net_kern.h"
10 #include "net_user.h"
11 #include "pcap_user.h"
12
13 struct pcap_init {
14         char *host_if;
15         int promisc;
16         int optimize;
17         char *filter;
18 };
19
20 void pcap_init(struct net_device *dev, void *data)
21 {
22         struct uml_net_private *pri;
23         struct pcap_data *ppri;
24         struct pcap_init *init = data;
25
26         pri = dev->priv;
27         ppri = (struct pcap_data *) pri->user;
28         ppri->host_if = init->host_if;
29         ppri->promisc = init->promisc;
30         ppri->optimize = init->optimize;
31         ppri->filter = init->filter;
32 }
33
34 static int pcap_read(int fd, struct sk_buff **skb, 
35                        struct uml_net_private *lp)
36 {
37         *skb = ether_adjust_skb(*skb, ETH_HEADER_OTHER);
38         if(*skb == NULL) return(-ENOMEM);
39         return(pcap_user_read(fd, (*skb)->mac.raw, 
40                               (*skb)->dev->mtu + ETH_HEADER_OTHER,
41                               (struct pcap_data *) &lp->user));
42 }
43
44 static int pcap_write(int fd, struct sk_buff **skb, struct uml_net_private *lp)
45 {
46         return(-EPERM);
47 }
48
49 static struct net_kern_info pcap_kern_info = {
50         .init                   = pcap_init,
51         .protocol               = eth_protocol,
52         .read                   = pcap_read,
53         .write                  = pcap_write,
54 };
55
56 int pcap_setup(char *str, char **mac_out, void *data)
57 {
58         struct pcap_init *init = data;
59         char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
60         int i;
61
62         *init = ((struct pcap_init)
63                 { .host_if      = "eth0",
64                   .promisc      = 1,
65                   .optimize     = 0,
66                   .filter       = NULL });
67
68         remain = split_if_spec(str, &host_if, &init->filter, 
69                                &options[0], &options[1], NULL);
70         if(remain != NULL){
71                 printk(KERN_ERR "pcap_setup - Extra garbage on "
72                        "specification : '%s'\n", remain);
73                 return(0);
74         }
75
76         if(host_if != NULL)
77                 init->host_if = host_if;
78
79         for(i = 0; i < sizeof(options)/sizeof(options[0]); i++){
80                 if(options[i] == NULL)
81                         continue;
82                 if(!strcmp(options[i], "promisc"))
83                         init->promisc = 1;
84                 else if(!strcmp(options[i], "nopromisc"))
85                         init->promisc = 0;
86                 else if(!strcmp(options[i], "optimize"))
87                         init->optimize = 1;
88                 else if(!strcmp(options[i], "nooptimize"))
89                         init->optimize = 0;
90                 else printk("pcap_setup : bad option - '%s'\n", options[i]);
91         }
92
93         return(1);
94 }
95
96 static struct transport pcap_transport = {
97         .list           = LIST_HEAD_INIT(pcap_transport.list),
98         .name           = "pcap",
99         .setup          = pcap_setup,
100         .user           = &pcap_user_info,
101         .kern           = &pcap_kern_info,
102         .private_size   = sizeof(struct pcap_data),
103         .setup_size     = sizeof(struct pcap_init),
104 };
105
106 static int register_pcap(void)
107 {
108         register_transport(&pcap_transport);
109         return 0;
110 }
111
112 __initcall(register_pcap);