wireshark/wiretap/wtap.c

/* wtap.c
 *
 * $Id: wtap.c,v 1.15 1999/08/19 05:31:33 guy Exp $
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "wtap.h"
#include "buffer.h"

FILE* wtap_file(wtap *wth)
{
	return wth->fh;
}

int wtap_file_type(wtap *wth)
{
	return wth->file_type;
}

int wtap_snapshot_length(wtap *wth)
{
	return wth->snapshot_length;
}

const char *wtap_file_type_string(wtap *wth)
{
	switch (wth->file_type) {
		case WTAP_FILE_WTAP:
			return "wiretap";

		case WTAP_FILE_PCAP:
			return "pcap";

		case WTAP_FILE_LANALYZER:
			return "Novell LANalyzer";

		case WTAP_FILE_NGSNIFFER:
			return "Network Associates Sniffer (DOS-based)";

		case WTAP_FILE_SNOOP:
			return "snoop";

		case WTAP_FILE_IPTRACE:
			return "iptrace";

		case WTAP_FILE_NETMON_1_x:
			return "Microsoft Network Monitor 1.x";

		case WTAP_FILE_NETMON_2_x:
			return "Microsoft Network Monitor 2.x";

		case WTAP_FILE_NETXRAY_1_0:
			return "Cinco Networks NetXRay";

		case WTAP_FILE_NETXRAY_1_1:
			return "Network Associates Sniffer (Windows-based) 1.1";

		case WTAP_FILE_NETXRAY_2_001:
			return "Network Associates Sniffer (Windows-based) 2.001";

		case WTAP_FILE_RADCOM:
			return "RADCOM WAN/LAN analyzer";

		default:
			g_error("Unknown capture file type %d", wth->file_type);
			return NULL;
	}
}

void wtap_close(wtap *wth)
{
	/* free up memory. If any capture structure ever allocates
	 * its own memory, it would be better to make a *close() function
	 * for each filetype, like pcap_close(0, lanalyzer_close(), etc.
	 * But for now this will work. */
	switch(wth->file_type) {
		case WTAP_FILE_PCAP:
			g_free(wth->capture.pcap);
			break;

		case WTAP_FILE_LANALYZER:
			g_free(wth->capture.lanalyzer);
			break;

		case WTAP_FILE_NGSNIFFER:
			g_free(wth->capture.ngsniffer);
			break;

		case WTAP_FILE_RADCOM:
			g_free(wth->capture.radcom);
			break;

		case WTAP_FILE_NETMON_1_x:
		case WTAP_FILE_NETMON_2_x:
			g_free(wth->capture.netmon);
			break;

		case WTAP_FILE_NETXRAY_1_0:
		case WTAP_FILE_NETXRAY_1_1:
		case WTAP_FILE_NETXRAY_2_001:
			g_free(wth->capture.netxray);
			break;

		/* default:
			 nothing */
	}

	fclose(wth->fh);
}

int wtap_loop(wtap *wth, int count, wtap_handler callback, u_char* user,
	int *err)
{
	int data_offset, loop = 0;

	while ((data_offset = wth->subtype_read(wth, err)) > 0) {
		callback(user, &wth->phdr, data_offset,
		    buffer_start_ptr(wth->frame_buffer));
		if (count > 0 && ++loop >= count)
			break;
	}
	if (data_offset < 0)
		return FALSE;	/* failure */
	else
		return TRUE;	/* success */
}