![Ulf Lamping](/assets/img/avatar_default.png)
I've done more than a day to change the timestamp resolution from microseconds to nanoseconds. As I really don't want to loose those changes, I'm going to check in the changes I've done so far. Hopefully someone else will give me a helping hand with the things left ... What's done: I've changed the timestamp resolution from usec to nsec in almost any place in the sources. I've changed parts of the implementation in nstime.s/.h and a lot of places elsewhere. As I don't understand the editcap source (well, I'm maybe just too tired right now), hopefully someone else might be able to fix this soon. Doing all those changes, we get native nanosecond timestamp resolution in Ethereal. After fixing all the remaining issues, I'll take a look how to display this in a convenient way... As I've also changed the wiretap timestamp resolution from usec to nsec we might want to change the wiretap version number... svn path=/trunk/; revision=15520
362 lines
10 KiB
C
362 lines
10 KiB
C
/* tap-rpcstat.c
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* rpcstat 2002 Ronnie Sahlberg
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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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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/* This module provides rpc call/reply RTT statistics to tethereal.
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* It is only used by tethereal and not ethereal
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*
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* It serves as an example on how to use the tap api.
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*/
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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 <stdio.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <string.h>
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#include "epan/packet_info.h"
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#include <epan/tap.h>
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#include <epan/stat_cmd_args.h>
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#include <epan/dissectors/packet-rpc.h>
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#include "register.h"
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/* used to keep track of statistics for a specific procedure */
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typedef struct _rpc_procedure_t {
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const char *proc;
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int num;
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nstime_t min;
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nstime_t max;
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nstime_t tot;
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} rpc_procedure_t;
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/* used to keep track of the statistics for an entire program interface */
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typedef struct _rpcstat_t {
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const char *prog;
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char *filter;
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guint32 program;
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guint32 version;
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guint32 num_procedures;
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rpc_procedure_t *procedures;
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} rpcstat_t;
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/* This callback is never used by tethereal but it is here for completeness.
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* When registering below, we could just have left this function as NULL.
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*
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* When used by ethereal, this function will be called whenever we would need
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* to reset all state. Such as when ethereal opens a new file, when it
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* starts a new capture, when it rescans the packetlist after some prefs have
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* changed etc.
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* So if your aplication has some state it needs to clean up in those
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* situations, here is a good place to put that code.
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*/
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static void
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rpcstat_reset(void *prs)
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{
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rpcstat_t *rs=prs;
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guint32 i;
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for(i=0;i<rs->num_procedures;i++){
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rs->procedures[i].num=0;
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rs->procedures[i].min.secs=0;
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rs->procedures[i].min.nsecs=0;
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rs->procedures[i].max.secs=0;
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rs->procedures[i].max.nsecs=0;
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rs->procedures[i].tot.secs=0;
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rs->procedures[i].tot.nsecs=0;
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}
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}
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/* This callback is invoked whenever the tap system has seen a packet
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* we might be interested in.
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* The function is to be used to only update internal state information
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* in the *tapdata structure, and if there were state changes which requires
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* the window to be redrawn, return 1 and (*draw) will be called sometime
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* later.
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*
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* This function should be as lightweight as possible since it executes together
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* with the normal ethereal dissectors. Try to push as much processing as
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* possible into (*draw) instead since that function executes asynchronously
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* and does not affect the main threads performance.
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*
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* If it is possible, try to do all "filtering" explicitely as we do below in
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* this example since you will get MUCH better performance than applying
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* a similar display-filter in the register call.
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*
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* The third parameter is tap dependant. Since we register this one to the "rpc"
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* tap the third parameters type is rpc_call_info_value.
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*
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*
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* The filtering we do is just to check the rpc_call_info_value struct that
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* we were called for the proper program and version. We didnt apply a filter
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* when we registered so we will be called for ALL rpc packets and not just
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* the ones we are collecting stats for.
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*
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*
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* function returns :
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* 0: no updates, no need to call (*draw) later
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* !0: state has changed, call (*draw) sometime later
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*/
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static int
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rpcstat_packet(void *prs, packet_info *pinfo, epan_dissect_t *edt _U_, const void *pri)
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{
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rpcstat_t *rs=prs;
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const rpc_call_info_value *ri=pri;
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nstime_t delta;
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rpc_procedure_t *rp;
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if(ri->proc>=rs->num_procedures){
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/* dont handle this since its outside of known table */
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return 0;
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}
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/* we are only interested in reply packets */
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if(ri->request){
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return 0;
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}
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/* we are only interested in certain program/versions */
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if( (ri->prog!=rs->program) || (ri->vers!=rs->version) ){
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return 0;
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}
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rp=&(rs->procedures[ri->proc]);
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/* calculate time delta between request and reply */
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nstime_delta(&delta, &pinfo->fd->abs_ts, &ri->req_time);
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if(rp->num==0){
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rp->max.secs=delta.secs;
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rp->max.nsecs=delta.nsecs;
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}
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if(rp->num==0){
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rp->min.secs=delta.secs;
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rp->min.nsecs=delta.nsecs;
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}
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if( (delta.secs<rp->min.secs)
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||( (delta.secs==rp->min.secs)
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&&(delta.nsecs<rp->min.nsecs) ) ){
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rp->min.secs=delta.secs;
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rp->min.nsecs=delta.nsecs;
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}
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if( (delta.secs>rp->max.secs)
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||( (delta.secs==rp->max.secs)
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&&(delta.nsecs>rp->max.nsecs) ) ){
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rp->max.secs=delta.secs;
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rp->max.nsecs=delta.nsecs;
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}
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rp->tot.secs += delta.secs;
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rp->tot.nsecs += delta.nsecs;
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if(rp->tot.nsecs>1000000000){
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rp->tot.nsecs-=1000000000;
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rp->tot.secs++;
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}
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rp->num++;
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return 1;
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}
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/* This callback is used when tethereal wants us to draw/update our
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* data to the output device. Since this is tethereal only output is
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* stdout.
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* Tethereal will only call this callback once, which is when tethereal has
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* finished reading all packets and exists.
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* If used with ethereal this may be called any time, perhaps once every 3
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* seconds or so.
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* This function may even be called in parallell with (*reset) or (*draw)
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* so make sure there are no races. The data in the rpcstat_t can thus change
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* beneath us. Beware.
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*/
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static void
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rpcstat_draw(void *prs)
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{
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rpcstat_t *rs=prs;
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guint32 i;
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#ifdef G_HAVE_UINT64
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guint64 td;
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#else
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guint32 td;
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#endif
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printf("\n");
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printf("===================================================================\n");
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printf("%s Version %d RTT Statistics:\n", rs->prog, rs->version);
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printf("Filter: %s\n",rs->filter?rs->filter:"");
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printf("Procedure Calls Min RTT Max RTT Avg RTT\n");
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for(i=0;i<rs->num_procedures;i++){
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/* scale it to units of 10us.*/
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/* for long captures with a large tot time, this can overflow on 32bit */
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td=(int)rs->procedures[i].tot.secs;
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td=td*100000+(int)rs->procedures[i].tot.nsecs/10000;
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if(rs->procedures[i].num){
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td/=rs->procedures[i].num;
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} else {
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td=0;
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}
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printf("%-15s %6d %3d.%05d %3d.%05d %3d.%05d\n",
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rs->procedures[i].proc,
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rs->procedures[i].num,
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(int)rs->procedures[i].min.secs,rs->procedures[i].min.nsecs/10000,
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(int)rs->procedures[i].max.secs,rs->procedures[i].max.nsecs/10000,
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td/100000, td%100000
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);
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}
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printf("===================================================================\n");
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}
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static guint32 rpc_program=0;
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static guint32 rpc_version=0;
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static gint32 rpc_min_proc=-1;
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static gint32 rpc_max_proc=-1;
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static void *
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rpcstat_find_procs(gpointer *key, gpointer *value _U_, gpointer *user_data _U_)
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{
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rpc_proc_info_key *k=(rpc_proc_info_key *)key;
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if(k->prog!=rpc_program){
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return NULL;
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}
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if(k->vers!=rpc_version){
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return NULL;
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}
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if(rpc_min_proc==-1){
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rpc_min_proc=k->proc;
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rpc_max_proc=k->proc;
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}
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if((gint32)k->proc<rpc_min_proc){
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rpc_min_proc=k->proc;
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}
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if((gint32)k->proc>rpc_max_proc){
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rpc_max_proc=k->proc;
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}
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return NULL;
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}
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/* When called, this function will create a new instance of rpcstat.
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* program and version are whick onc-rpc program/version we want to
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* collect statistics for.
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* This function is called from tethereal when it parses the -z rpc, arguments
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* and it creates a new instance to store statistics in and registers this
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* new instance for the rpc tap.
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*/
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static void
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rpcstat_init(const char *optarg)
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{
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rpcstat_t *rs;
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guint32 i;
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int program, version;
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int pos=0;
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const char *filter=NULL;
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GString *error_string;
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if(sscanf(optarg,"rpc,rtt,%d,%d,%n",&program,&version,&pos)==2){
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if(pos){
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filter=optarg+pos;
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} else {
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filter=NULL;
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}
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} else {
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fprintf(stderr, "tethereal: invalid \"-z rpc,rtt,<program>,<version>[,<filter>]\" argument\n");
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exit(1);
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}
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rs=g_malloc(sizeof(rpcstat_t));
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rs->prog=rpc_prog_name(program);
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rs->program=program;
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rs->version=version;
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if(filter){
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rs->filter=g_malloc(strlen(filter)+1);
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strcpy(rs->filter, filter);
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} else {
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rs->filter=NULL;
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}
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rpc_program=program;
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rpc_version=version;
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rpc_min_proc=-1;
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rpc_max_proc=-1;
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g_hash_table_foreach(rpc_procs, (GHFunc)rpcstat_find_procs, NULL);
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if(rpc_min_proc==-1){
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fprintf(stderr,"tethereal: Invalid -z rpc,rrt,%d,%d\n",rpc_program,rpc_version);
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fprintf(stderr," Program:%d version:%d isn't supported by tethereal.\n", rpc_program, rpc_version);
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exit(1);
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}
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rs->num_procedures=rpc_max_proc+1;
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rs->procedures=g_malloc(sizeof(rpc_procedure_t)*(rs->num_procedures+1));
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for(i=0;i<rs->num_procedures;i++){
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rs->procedures[i].proc=rpc_proc_name(program, version, i);
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rs->procedures[i].num=0;
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rs->procedures[i].min.secs=0;
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rs->procedures[i].min.nsecs=0;
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rs->procedures[i].max.secs=0;
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rs->procedures[i].max.nsecs=0;
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rs->procedures[i].tot.secs=0;
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rs->procedures[i].tot.nsecs=0;
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}
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/* It is possible to create a filter and attach it to the callbacks. Then the
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* callbacks would only be invoked if the filter matched.
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* Evaluating filters is expensive and if we can avoid it and not use them
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* we gain performance.
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* In this case we do the filtering for protocol and version inside the
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* callback itself but use whatever filter the user provided.
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* (Perhaps the user only want the stats for nis+ traffic for certain objects?)
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*
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*/
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error_string=register_tap_listener("rpc", rs, filter, rpcstat_reset, rpcstat_packet, rpcstat_draw);
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if(error_string){
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/* error, we failed to attach to the tap. clean up */
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g_free(rs->procedures);
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g_free(rs->filter);
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g_free(rs);
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fprintf(stderr, "tethereal: Couldn't register rpc,rtt tap: %s\n",
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error_string->str);
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g_string_free(error_string, TRUE);
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exit(1);
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}
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}
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void
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register_tap_listener_rpcstat(void)
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{
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register_stat_cmd_arg("rpc,rtt,", rpcstat_init);
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}
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