/* tap-smbstat.c
 * smbstat   2003 Ronnie Sahlberg
 *
 * $Id: tap-smbstat.c,v 1.1 2003/01/22 00:42:03 sahlberg Exp $
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * Copyright 1998 Gerald Combs
 * 
 * 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 <stdio.h>

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#include <string.h>
#include "epan/packet_info.h"
#include "tap.h"
#include "epan/value_string.h"
#include "smb.h"
#include "register.h"


typedef struct _smb_procedure_t {
	int num;
	nstime_t min;
	nstime_t max;
	nstime_t tot;
} smb_procedure_t;

/* used to keep track of the statistics for an entire program interface */
typedef struct _smbstat_t {
	char *filter;
	smb_procedure_t proc[256];
	smb_procedure_t trans2[256];
	smb_procedure_t nt_trans[256];
} smbstat_t;



static int
smbstat_packet(void *pss, packet_info *pinfo, epan_dissect_t *edt _U_, void *psi)
{
	smbstat_t *ss=(smbstat_t *)pss;
	smb_info_t *si=psi;
	nstime_t delta;
	smb_procedure_t *sp;

	/* we are only interested in reply packets */
	if(si->request){
		return 0;
	}
	/* if we havnt seen the request, just ignore it */
	if(!si->sip){
		return 0;
	}

	if(si->cmd==0xA0){
		smb_nt_transact_info_t *sti=(smb_nt_transact_info_t *)si->sip->extra_info;

		/*nt transaction*/
		sp=&(ss->nt_trans[sti->subcmd]);
	} else if(si->cmd==0x32){
		smb_transact2_info_t *st2i=(smb_transact2_info_t *)si->sip->extra_info;

		/*transaction2*/
		sp=&(ss->trans2[st2i->subcmd]);
	} else {
		sp=&(ss->proc[si->cmd]);
	}

	/* calculate time delta between request and reply */
	delta.secs=pinfo->fd->abs_secs-si->sip->req_time.secs;
	delta.nsecs=pinfo->fd->abs_usecs*1000-si->sip->req_time.nsecs;
	if(delta.nsecs<0){
		delta.nsecs+=1000000000;
		delta.secs--;
	}

	if((sp->max.secs==0)
	&& (sp->max.nsecs==0) ){
		sp->max.secs=delta.secs;
		sp->max.nsecs=delta.nsecs;
	}

	if((sp->min.secs==0)
	&& (sp->min.nsecs==0) ){
		sp->min.secs=delta.secs;
		sp->min.nsecs=delta.nsecs;
	}

	if( (delta.secs<sp->min.secs)
	||( (delta.secs==sp->min.secs)
	  &&(delta.nsecs<sp->min.nsecs) ) ){
		sp->min.secs=delta.secs;
		sp->min.nsecs=delta.nsecs;
	}

	if( (delta.secs>sp->max.secs)
	||( (delta.secs==sp->max.secs)
	  &&(delta.nsecs>sp->max.nsecs) ) ){
		sp->max.secs=delta.secs;
		sp->max.nsecs=delta.nsecs;
	}
	
	sp->tot.secs += delta.secs;
	sp->tot.nsecs += delta.nsecs;
	if(sp->tot.nsecs>1000000000){
		sp->tot.nsecs-=1000000000;
		sp->tot.secs++;
	}
	sp->num++;

	return 1;
}

static void
smbstat_draw(void *pss)
{
	smbstat_t *ss=(smbstat_t *)pss;
	guint32 i;
#ifdef G_HAVE_UINT64
	guint64 td;
#else
	guint32 td;
#endif
	printf("\n");
	printf("===================================================================\n");
	printf("SMB RTT Statistics:\n");
	printf("Filter: %s\n",ss->filter?ss->filter:"");
	printf("Commands                   Calls   Min RTT   Max RTT   Avg RTT\n");
	for(i=0;i<256;i++){
		/* nothing seen, nothing to do */
		if(ss->proc[i].num==0){
			continue;
		}

		/* we deal with transaction2 later */
		if(i==0x32){
			continue;
		}

		/* we deal with nt transaction later */
		if(i==0xA0){
			continue;
		}

		/* scale it to units of 10us.*/
		/* for long captures with a large tot time, this can overflow on 32bit */
		td=(int)ss->proc[i].tot.secs;
		td=td*100000+(int)ss->proc[i].tot.nsecs/10000;
		if(ss->proc[i].num){
			td/=ss->proc[i].num;
		} else {
			td=0;
		}

		printf("%-25s %6d %3d.%05d %3d.%05d %3d.%05d\n",
			val_to_str(i, smb_cmd_vals, "Unknown (0x%02x)"),
			ss->proc[i].num,
			(int)ss->proc[i].min.secs,ss->proc[i].min.nsecs/10000,
			(int)ss->proc[i].max.secs,ss->proc[i].max.nsecs/10000,
			td/100000, td%100000
		);
	}

	printf("\n");
	printf("Transaction2 Commands      Calls   Min RTT   Max RTT   Avg RTT\n");
	for(i=0;i<256;i++){
		/* nothing seen, nothing to do */
		if(ss->trans2[i].num==0){
			continue;
		}

		/* scale it to units of 10us.*/
		/* for long captures with a large tot time, this can overflow on 32bit */
		td=(int)ss->trans2[i].tot.secs;
		td=td*100000+(int)ss->trans2[i].tot.nsecs/10000;
		if(ss->trans2[i].num){
			td/=ss->trans2[i].num;
		} else {
			td=0;
		}

		printf("%-25s %6d %3d.%05d %3d.%05d %3d.%05d\n",
			val_to_str(i, trans2_cmd_vals, "Unknown (0x%02x)"),
			ss->trans2[i].num,
			(int)ss->trans2[i].min.secs,ss->trans2[i].min.nsecs/10000,
			(int)ss->trans2[i].max.secs,ss->trans2[i].max.nsecs/10000,
			td/100000, td%100000
		);
	}

	printf("\n");
	printf("NT Transaction Commands    Calls   Min RTT   Max RTT   Avg RTT\n");
	for(i=0;i<256;i++){
		/* nothing seen, nothing to do */
		if(ss->nt_trans[i].num==0){
			continue;
		}

		/* scale it to units of 10us.*/
		/* for long captures with a large tot time, this can overflow on 32bit */
		td=(int)ss->nt_trans[i].tot.secs;
		td=td*100000+(int)ss->nt_trans[i].tot.nsecs/10000;
		if(ss->nt_trans[i].num){
			td/=ss->nt_trans[i].num;
		} else {
			td=0;
		}

		printf("%-25s %6d %3d.%05d %3d.%05d %3d.%05d\n",
			val_to_str(i, nt_cmd_vals, "Unknown (0x%02x)"),
			ss->nt_trans[i].num,
			(int)ss->nt_trans[i].min.secs,ss->nt_trans[i].min.nsecs/10000,
			(int)ss->nt_trans[i].max.secs,ss->nt_trans[i].max.nsecs/10000,
			td/100000, td%100000
		);
	}

	printf("===================================================================\n");
}


static void
smbstat_init(char *optarg)
{
	smbstat_t *ss;
	guint32 i;
	char *filter=NULL;


	if(!strncmp(optarg,"smb,rtt,",8)){
		filter=optarg+8;
	} else {
		filter=NULL;
	}

	ss=g_malloc(sizeof(smbstat_t));
	if(filter){
		ss->filter=g_malloc(strlen(filter)+1);
		strcpy(ss->filter, filter);
	} else {
		ss->filter=NULL;
	}

	for(i=0;i<256;i++){
		ss->proc[i].num=0;	
		ss->proc[i].min.secs=0;
		ss->proc[i].min.nsecs=0;
		ss->proc[i].max.secs=0;
		ss->proc[i].max.nsecs=0;
		ss->proc[i].tot.secs=0;
		ss->proc[i].tot.nsecs=0;
		
		ss->trans2[i].num=0;	
		ss->trans2[i].min.secs=0;
		ss->trans2[i].min.nsecs=0;
		ss->trans2[i].max.secs=0;
		ss->trans2[i].max.nsecs=0;
		ss->trans2[i].tot.secs=0;
		ss->trans2[i].tot.nsecs=0;
	}

	if(register_tap_listener("smb", ss, filter, NULL, smbstat_packet, smbstat_draw)){
		/* error, we failed to attach to the tap. clean up */
		g_free(ss->filter);
		g_free(ss);

		fprintf(stderr,"tethereal: smbstat_init() failed to attach to tap.\n");
		exit(1);
	}
}


void
register_tap_listener_smbstat(void)
{
	register_ethereal_tap("smb,rtt", smbstat_init, NULL, NULL);
}