* PCAP capture file reader
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
-#include <pcap/pcap.h>
+#include <pcap.h>
#include "utils/common.h"
#include "wlantest.h"
+static void write_pcap_with_radiotap(struct wlantest *wt,
+ const u8 *data, size_t data_len)
+{
+ struct pcap_pkthdr h;
+ u8 rtap[] = {
+ 0x00 /* rev */,
+ 0x00 /* pad */,
+ 0x0a, 0x00, /* header len */
+ 0x02, 0x00, 0x00, 0x00, /* present flags */
+ 0x00, /* flags */
+ 0x00 /* pad */
+ };
+ u8 *buf;
+ size_t len;
+
+ if (wt->assume_fcs)
+ rtap[8] |= 0x10;
+
+ os_memset(&h, 0, sizeof(h));
+ h.ts = wt->write_pcap_time;
+ len = sizeof(rtap) + data_len;
+ buf = os_malloc(len);
+ if (buf == NULL)
+ return;
+ os_memcpy(buf, rtap, sizeof(rtap));
+ os_memcpy(buf + sizeof(rtap), data, data_len);
+ h.caplen = len;
+ h.len = len;
+ pcap_dump(wt->write_pcap_dumper, &h, buf);
+ os_free(buf);
+}
+
+
int read_cap_file(struct wlantest *wt, const char *fname)
{
char errbuf[PCAP_ERRBUF_SIZE];
struct pcap_pkthdr *hdr;
const u_char *data;
int res;
+ int dlt;
pcap = pcap_open_offline(fname, errbuf);
if (pcap == NULL) {
fname, errbuf);
return -1;
}
+ dlt = pcap_datalink(pcap);
+ if (dlt != DLT_IEEE802_11_RADIO && dlt != DLT_PRISM_HEADER &&
+ dlt != DLT_IEEE802_11) {
+ wpa_printf(MSG_ERROR, "Unsupported pcap datalink type: %d",
+ dlt);
+ pcap_close(pcap);
+ return -1;
+ }
+ wpa_printf(MSG_DEBUG, "pcap datalink type: %d", dlt);
for (;;) {
+ clear_notes(wt);
+ os_free(wt->decrypted);
+ wt->decrypted = NULL;
+
res = pcap_next_ex(pcap, &hdr, &data);
if (res == -2)
break; /* No more packets */
hdr->caplen, hdr->len);
if (wt->write_pcap_dumper) {
wt->write_pcap_time = hdr->ts;
- pcap_dump(wt->write_pcap_dumper, hdr, data);
+ if (dlt == DLT_IEEE802_11)
+ write_pcap_with_radiotap(wt, data, hdr->caplen);
+ else
+ pcap_dump(wt->write_pcap_dumper, hdr, data);
+ if (wt->pcap_no_buffer)
+ pcap_dump_flush(wt->write_pcap_dumper);
}
if (hdr->caplen < hdr->len) {
- wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "
- "(%u/%u captured)",
- hdr->caplen, hdr->len);
+ add_note(wt, MSG_DEBUG, "pcap: Dropped incomplete "
+ "frame (%u/%u captured)",
+ hdr->caplen, hdr->len);
+ write_pcapng_write_read(wt, dlt, hdr, data);
continue;
}
count++;
- wlantest_process(wt, data, hdr->caplen);
+ switch (dlt) {
+ case DLT_IEEE802_11_RADIO:
+ wlantest_process(wt, data, hdr->caplen);
+ break;
+ case DLT_PRISM_HEADER:
+ wlantest_process_prism(wt, data, hdr->caplen);
+ break;
+ case DLT_IEEE802_11:
+ wlantest_process_80211(wt, data, hdr->caplen);
+ break;
+ }
+ write_pcapng_write_read(wt, dlt, hdr, data);
}
pcap_close(pcap);