| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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(1); |
| 110 | } |
| 111 | |
| 112 | __initcall(register_pcap); |
| 113 | |
| 114 | /* |
| 115 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 116 | * Emacs will notice this stuff at the end of the file and automatically |
| 117 | * adjust the settings for this buffer only. This must remain at the end |
| 118 | * of the file. |
| 119 | * --------------------------------------------------------------------------- |
| 120 | * Local variables: |
| 121 | * c-file-style: "linux" |
| 122 | * End: |
| 123 | */ |