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/*
* PCAP capture file writer
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include <pcap.h>
#include <pcap-bpf.h>
#include "utils/common.h"
#include "wlantest.h"
int write_pcap_init(struct wlantest *wt, const char *fname)
{
wt->write_pcap = pcap_open_dead(DLT_IEEE802_11_RADIO, 4000);
if (wt->write_pcap == NULL)
return -1;
wt->write_pcap_dumper = pcap_dump_open(wt->write_pcap, fname);
if (wt->write_pcap_dumper == NULL) {
pcap_close(wt->write_pcap);
wt->write_pcap = NULL;
return -1;
}
wpa_printf(MSG_DEBUG, "Writing PCAP dump to '%s'", fname);
return 0;
}
void write_pcap_deinit(struct wlantest *wt)
{
if (wt->write_pcap_dumper) {
pcap_dump_close(wt->write_pcap_dumper);
wt->write_pcap_dumper = NULL;
}
if (wt->write_pcap) {
pcap_close(wt->write_pcap);
wt->write_pcap = NULL;
}
}
void write_pcap_captured(struct wlantest *wt, const u8 *buf, size_t len)
{
struct pcap_pkthdr h;
if (!wt->write_pcap_dumper)
return;
os_memset(&h, 0, sizeof(h));
gettimeofday(&wt->write_pcap_time, NULL);
h.ts = wt->write_pcap_time;
h.caplen = len;
h.len = len;
pcap_dump(wt->write_pcap_dumper, &h, buf);
}
void write_pcap_decrypted(struct wlantest *wt, const u8 *buf1, size_t len1,
const u8 *buf2, size_t len2)
{
struct pcap_pkthdr h;
u8 rtap[] = {
0x00 /* rev */,
0x00 /* pad */,
0x08, 0x00, /* header len */
0x00, 0x00, 0x00, 0x00 /* present flags */
};
u8 *buf;
size_t len;
if (!wt->write_pcap_dumper)
return;
os_memset(&h, 0, sizeof(h));
h.ts = wt->write_pcap_time;
len = sizeof(rtap) + len1 + len2;
buf = os_malloc(len);
if (buf == NULL)
return;
os_memcpy(buf, rtap, sizeof(rtap));
if (buf1) {
os_memcpy(buf + sizeof(rtap), buf1, len1);
buf[sizeof(rtap) + 1] &= ~0x40; /* Clear Protected flag */
}
if (buf2)
os_memcpy(buf + sizeof(rtap) + len1, buf2, len2);
h.caplen = len;
h.len = len;
pcap_dump(wt->write_pcap_dumper, &h, buf);
os_free(buf);
}
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