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wlantest: Add radiotap header when re-writing DLT_IEEE802_11 file

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When using DLT_IEEE802_11 datalink type in a pcap file, wlantest will now
add a radiotap header to the re-written pcap file to make sure all frames
in the output file will include the radiotap header.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-01-17 16:22:41 +02:00 committed by Jouni Malinen
parent 2531517600
commit 0321bcdfa8
1 changed files with 37 additions and 1 deletions
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38
wlantest/readpcap.c
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@ -13,6 +13,39 @@
#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];
@ -61,7 +94,10 @@ int read_cap_file(struct wlantest *wt, const char *fname)
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 (hdr->caplen < hdr->len) {
wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "