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/* tap-smb2stat.c
* Based off if smbstat by Ronnie Sahlberg
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "epan/packet_info.h"
#include <epan/tap.h>
#include <epan/stat_tap_ui.h>
#include "epan/value_string.h"
#include <ui/cli/cli_service_response_time_table.h>
#include <epan/dissectors/packet-smb2.h>
#include "epan/timestats.h"
void register_tap_listener_smbstat(void);
#define SMB2_NUM_PROCEDURES 256
/* used to keep track of the statistics for an entire program interface */
typedef struct _smb2stat_t {
srt_stat_table smb2_srt_table;
} smb2stat_t;
static int
smb2stat_packet(void *pss, packet_info *pinfo, epan_dissect_t *edt _U_, const void *psi)
{
smb2stat_t *ss=(smb2stat_t *)pss;
const smb2_info_t *si=(const smb2_info_t *)psi;
/* we are only interested in response packets */
if(!(si->flags&SMB2_FLAGS_RESPONSE)){
return 0;
}
/* if we haven't seen the request, just ignore it */
if(!si->saved){
return 0;
}
/* SMB2 SRT can be very inaccurate in the presence of retransmissions. Retransmitted responses
* not only add additional (bogus) transactions but also the latency associated with them.
* This can greatly inflate the maximum and average SRT stats especially in the case of
* retransmissions triggered by the expiry of the rexmit timer (RTOs). Only calculating SRT
* for the last received response accomplishes this goal without requiring the TCP pref
* "Do not call subdissectors for error packets" to be set. */
if(si->saved->frame_req
&& si->saved->frame_res==pinfo->fd->num)
add_srt_table_data(&ss->smb2_srt_table, si->opcode, &si->saved->req_time, pinfo);
else
return 0;
return 1;
}
static void
smb2stat_draw(void *pss)
{
smb2stat_t *ss = (smb2stat_t *)pss;
draw_srt_table_data(&ss->smb2_srt_table, TRUE, TRUE);
}
static void
smb2stat_init(const char *opt_arg, void *userdata _U_)
{
smb2stat_t *ss;
guint32 i;
const char *filter = NULL;
GString *error_string;
if (!strncmp(opt_arg, "smb2,srt,", 8)) {
filter = opt_arg + 8;
}
ss = g_new(smb2stat_t, 1);
init_srt_table("SMB2", &ss->smb2_srt_table, SMB2_NUM_PROCEDURES, "Commands", filter ? g_strdup(filter) : NULL);
for (i = 0; i < SMB2_NUM_PROCEDURES; i++)
{
init_srt_table_row(&ss->smb2_srt_table, i, val_to_str_ext_const(i, &smb2_cmd_vals_ext, "<unknown>"));
}
error_string = register_tap_listener("smb2", ss, filter, 0, NULL, smb2stat_packet, smb2stat_draw);
if (error_string) {
/* error, we failed to attach to the tap. clean up */
free_srt_table_data(&ss->smb2_srt_table);
g_free(ss);
fprintf(stderr, "tshark: Couldn't register smb2,srt tap: %s\n",
error_string->str);
g_string_free(error_string, TRUE);
exit(1);
}
}
static stat_tap_ui smb2stat_ui = {
REGISTER_STAT_GROUP_GENERIC,
NULL,
"smb2,srt",
smb2stat_init,
0,
NULL
};
void
register_tap_listener_smb2stat(void)
{
register_stat_tap_ui(&smb2stat_ui, NULL);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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