182 lines
4.2 KiB
C
182 lines
4.2 KiB
C
/* wtap.c
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*
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* $Id: wtap.c,v 1.17 1999/08/22 03:50:31 guy Exp $
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "wtap.h"
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#include "buffer.h"
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FILE* wtap_file(wtap *wth)
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{
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return wth->fh;
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}
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int wtap_file_type(wtap *wth)
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{
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return wth->file_type;
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}
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int wtap_snapshot_length(wtap *wth)
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{
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return wth->snapshot_length;
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}
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const char *wtap_file_type_string(wtap *wth)
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{
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switch (wth->file_type) {
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case WTAP_FILE_WTAP:
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return "wiretap";
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case WTAP_FILE_PCAP:
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return "pcap";
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case WTAP_FILE_LANALYZER:
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return "Novell LANalyzer";
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case WTAP_FILE_NGSNIFFER:
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return "Network Associates Sniffer (DOS-based)";
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case WTAP_FILE_SNOOP:
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return "snoop";
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case WTAP_FILE_IPTRACE:
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return "iptrace";
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case WTAP_FILE_NETMON_1_x:
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return "Microsoft Network Monitor 1.x";
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case WTAP_FILE_NETMON_2_x:
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return "Microsoft Network Monitor 2.x";
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case WTAP_FILE_NETXRAY_1_0:
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return "Cinco Networks NetXRay";
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case WTAP_FILE_NETXRAY_1_1:
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return "Network Associates Sniffer (Windows-based) 1.1";
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case WTAP_FILE_NETXRAY_2_001:
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return "Network Associates Sniffer (Windows-based) 2.001";
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case WTAP_FILE_RADCOM:
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return "RADCOM WAN/LAN analyzer";
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default:
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g_error("Unknown capture file type %d", wth->file_type);
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return NULL;
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}
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}
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static const char *wtap_errlist[] = {
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"The file isn't a plain file",
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"The file isn't a capture file in a known format",
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"File contains record data we don't support",
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NULL,
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"Files can't be saved in that format",
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"Files from that network type can't be saved in that format",
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"That format doesn't support per-packet encapsulations",
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NULL,
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NULL,
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"Less data was read than was expected",
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"File contains a record that's not valid",
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"Less data was written than was requested"
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};
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#define WTAP_ERRLIST_SIZE (sizeof wtap_errlist / sizeof wtap_errlist[0])
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const char *wtap_strerror(int err)
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{
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static char errbuf[6+11+1]; /* "Error %d" */
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int wtap_errlist_index;
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if (err < 0) {
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wtap_errlist_index = -1 - err;
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if (wtap_errlist_index >= WTAP_ERRLIST_SIZE) {
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sprintf(errbuf, "Error %d", err);
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return errbuf;
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}
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if (wtap_errlist[wtap_errlist_index] == NULL)
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return "Unknown reason";
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return wtap_errlist[wtap_errlist_index];
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} else
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return strerror(err);
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}
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void wtap_close(wtap *wth)
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{
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/* free up memory. If any capture structure ever allocates
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* its own memory, it would be better to make a *close() function
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* for each filetype, like pcap_close(0, lanalyzer_close(), etc.
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* But for now this will work. */
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switch(wth->file_type) {
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case WTAP_FILE_PCAP:
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g_free(wth->capture.pcap);
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break;
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case WTAP_FILE_LANALYZER:
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g_free(wth->capture.lanalyzer);
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break;
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case WTAP_FILE_NGSNIFFER:
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g_free(wth->capture.ngsniffer);
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break;
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case WTAP_FILE_RADCOM:
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g_free(wth->capture.radcom);
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break;
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case WTAP_FILE_NETMON_1_x:
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case WTAP_FILE_NETMON_2_x:
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g_free(wth->capture.netmon);
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break;
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case WTAP_FILE_NETXRAY_1_0:
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case WTAP_FILE_NETXRAY_1_1:
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case WTAP_FILE_NETXRAY_2_001:
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g_free(wth->capture.netxray);
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break;
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/* default:
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nothing */
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}
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fclose(wth->fh);
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}
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int wtap_loop(wtap *wth, int count, wtap_handler callback, u_char* user,
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int *err)
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{
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int data_offset, loop = 0;
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while ((data_offset = wth->subtype_read(wth, err)) > 0) {
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callback(user, &wth->phdr, data_offset,
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buffer_start_ptr(wth->frame_buffer));
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if (count > 0 && ++loop >= count)
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break;
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}
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if (data_offset < 0)
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return FALSE; /* failure */
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else
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return TRUE; /* success */
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}
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