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/*
* 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.
*/
#include "utils/includes.h"
#include <pcap.h>
#include "utils/common.h"
#include "wlantest.h"
int read_cap_file(struct wlantest *wt, const char *fname)
{
char errbuf[PCAP_ERRBUF_SIZE];
pcap_t *pcap;
unsigned int count = 0;
struct pcap_pkthdr *hdr;
const u_char *data;
int res;
int dlt;
pcap = pcap_open_offline(fname, errbuf);
if (pcap == NULL) {
wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s",
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 (;;) {
res = pcap_next_ex(pcap, &hdr, &data);
if (res == -2)
break; /* No more packets */
if (res == -1) {
wpa_printf(MSG_INFO, "pcap_next_ex failure: %s",
pcap_geterr(pcap));
break;
}
if (res != 1) {
wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return "
"value %d", res);
break;
}
/* Packet was read without problems */
wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d "
"len=%u/%u",
(int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec,
hdr->caplen, hdr->len);
if (wt->write_pcap_dumper) {
wt->write_pcap_time = hdr->ts;
pcap_dump(wt->write_pcap_dumper, hdr, data);
}
if (hdr->caplen < hdr->len) {
wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "
"(%u/%u captured)",
hdr->caplen, hdr->len);
continue;
}
count++;
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);
}
}
pcap_close(pcap);
wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count);
return 0;
}
int read_wired_cap_file(struct wlantest *wt, const char *fname)
{
char errbuf[PCAP_ERRBUF_SIZE];
pcap_t *pcap;
unsigned int count = 0;
struct pcap_pkthdr *hdr;
const u_char *data;
int res;
pcap = pcap_open_offline(fname, errbuf);
if (pcap == NULL) {
wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s",
fname, errbuf);
return -1;
}
for (;;) {
res = pcap_next_ex(pcap, &hdr, &data);
if (res == -2)
break; /* No more packets */
if (res == -1) {
wpa_printf(MSG_INFO, "pcap_next_ex failure: %s",
pcap_geterr(pcap));
break;
}
if (res != 1) {
wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return "
"value %d", res);
break;
}
/* Packet was read without problems */
wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d "
"len=%u/%u",
(int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec,
hdr->caplen, hdr->len);
if (hdr->caplen < hdr->len) {
wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "
"(%u/%u captured)",
hdr->caplen, hdr->len);
continue;
}
count++;
wlantest_process_wired(wt, data, hdr->caplen);
}
pcap_close(pcap);
wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count);
return 0;
}
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