hostap/wlantest/readpcap.c
Jouni Malinen ef00c78097 wlantest: Replace pcap header directory
The use of the pcap subdirectory seems to be limited to some of the
newer Linux distros only, so use the older paths to pcap.h and
pcap-bpf.h to make wlantest bit more easier to compile on older
systems.
2010-12-17 08:06:52 +02:00

150 lines
3.5 KiB
C

/*
* 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;
}