2 * Copyright (C) 2002 Jeff Dike <jdike@karaya.com>
3 * Licensed under the GPL.
11 #include <asm/types.h>
13 #include "pcap_user.h"
15 #include "um_malloc.h"
17 #define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
19 #define PCAP_FD(p) (*(int *)(p))
21 static int pcap_user_init(void *data, void *dev)
23 struct pcap_data *pri = data;
25 char errors[PCAP_ERRBUF_SIZE];
27 p = pcap_open_live(pri->host_if, MAX_PACKET, pri->promisc, 0, errors);
29 printk("pcap_user_init : pcap_open_live failed - '%s'\n",
39 static int pcap_open(void *data)
41 struct pcap_data *pri = data;
48 if(pri->filter != NULL){
49 err = dev_netmask(pri->dev, &netmask);
51 printk("pcap_open : dev_netmask failed\n");
55 pri->compiled = um_kmalloc(sizeof(struct bpf_program));
56 if(pri->compiled == NULL){
57 printk("pcap_open : kmalloc failed\n");
61 err = pcap_compile(pri->pcap,
62 (struct bpf_program *) pri->compiled,
63 pri->filter, pri->optimize, netmask);
65 printk("pcap_open : pcap_compile failed - '%s'\n",
66 pcap_geterr(pri->pcap));
70 err = pcap_setfilter(pri->pcap, pri->compiled);
72 printk("pcap_open : pcap_setfilter failed - '%s'\n",
73 pcap_geterr(pri->pcap));
78 return PCAP_FD(pri->pcap);
81 static void pcap_remove(void *data)
83 struct pcap_data *pri = data;
85 if(pri->compiled != NULL)
86 pcap_freecode(pri->compiled);
88 pcap_close(pri->pcap);
91 struct pcap_handler_data {
96 static void handler(u_char *data, const struct pcap_pkthdr *header,
101 struct pcap_handler_data *hdata = (struct pcap_handler_data *) data;
103 len = hdata->len < header->caplen ? hdata->len : header->caplen;
104 memcpy(hdata->buffer, packet, len);
108 int pcap_user_read(int fd, void *buffer, int len, struct pcap_data *pri)
110 struct pcap_handler_data hdata = ((struct pcap_handler_data)
115 n = pcap_dispatch(pri->pcap, 1, handler, (u_char *) &hdata);
117 printk("pcap_dispatch failed - %s\n", pcap_geterr(pri->pcap));
125 const struct net_user_info pcap_user_info = {
126 .init = pcap_user_init,
129 .remove = pcap_remove,
132 .delete_address = NULL,
133 .max_packet = MAX_PACKET - ETH_HEADER_OTHER