mirror of
https://github.com/vanhoefm/fragattacks.git
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64f45d070b
The output file includes all the capture (or read from wireless PCAP file) frames in their original contents and another copy of each frame that is decrypted in wlantest (including EAPOL-Key Key Data field).
132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/*
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* PCAP capture file reader
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* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "utils/includes.h"
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#include <pcap/pcap.h>
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#include "utils/common.h"
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#include "wlantest.h"
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int read_cap_file(struct wlantest *wt, const char *fname)
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{
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char errbuf[PCAP_ERRBUF_SIZE];
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pcap_t *pcap;
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unsigned int count = 0;
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struct pcap_pkthdr *hdr;
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const u_char *data;
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int res;
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pcap = pcap_open_offline(fname, errbuf);
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if (pcap == NULL) {
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wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s",
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fname, errbuf);
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return -1;
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}
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for (;;) {
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res = pcap_next_ex(pcap, &hdr, &data);
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if (res == -2)
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break; /* No more packets */
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if (res == -1) {
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wpa_printf(MSG_INFO, "pcap_next_ex failure: %s",
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pcap_geterr(pcap));
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break;
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}
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if (res != 1) {
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wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return "
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"value %d", res);
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break;
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}
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/* Packet was read without problems */
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wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d "
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"len=%u/%u",
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(int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec,
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hdr->caplen, hdr->len);
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if (wt->write_pcap_dumper) {
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wt->write_pcap_time = hdr->ts;
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pcap_dump(wt->write_pcap_dumper, hdr, data);
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}
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if (hdr->caplen < hdr->len) {
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wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "
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"(%u/%u captured)",
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hdr->caplen, hdr->len);
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continue;
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}
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count++;
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wlantest_process(wt, data, hdr->caplen);
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}
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pcap_close(pcap);
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wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count);
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return 0;
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}
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int read_wired_cap_file(struct wlantest *wt, const char *fname)
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{
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char errbuf[PCAP_ERRBUF_SIZE];
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pcap_t *pcap;
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unsigned int count = 0;
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struct pcap_pkthdr *hdr;
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const u_char *data;
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int res;
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pcap = pcap_open_offline(fname, errbuf);
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if (pcap == NULL) {
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wpa_printf(MSG_ERROR, "Failed to read pcap file '%s': %s",
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fname, errbuf);
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return -1;
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}
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for (;;) {
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res = pcap_next_ex(pcap, &hdr, &data);
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if (res == -2)
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break; /* No more packets */
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if (res == -1) {
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wpa_printf(MSG_INFO, "pcap_next_ex failure: %s",
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pcap_geterr(pcap));
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break;
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}
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if (res != 1) {
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wpa_printf(MSG_INFO, "Unexpected pcap_next_ex return "
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"value %d", res);
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break;
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}
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/* Packet was read without problems */
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wpa_printf(MSG_EXCESSIVE, "pcap hdr: ts=%d.%06d "
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"len=%u/%u",
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(int) hdr->ts.tv_sec, (int) hdr->ts.tv_usec,
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hdr->caplen, hdr->len);
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if (hdr->caplen < hdr->len) {
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wpa_printf(MSG_DEBUG, "pcap: Dropped incomplete frame "
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"(%u/%u captured)",
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hdr->caplen, hdr->len);
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continue;
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}
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count++;
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wlantest_process_wired(wt, data, hdr->caplen);
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}
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pcap_close(pcap);
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wpa_printf(MSG_DEBUG, "Read %s: %u packets", fname, count);
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return 0;
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}
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