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/* tap-expert.c
* Copyright 2011 Martin Mathieson
*
* $Id$
*
* 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., 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.h>
#include <epan/packet_info.h>
#include <epan/tap.h>
#include <epan/stat_cmd_args.h>
#include <epan/expert.h>
/* Tap data */
typedef enum severity_level_t {
chat_level=0,
note_level,
warn_level,
error_level,
max_level
} severity_level_t;
typedef struct expert_tapdata_t {
GArray *ei_array[max_level]; /* expert info items */
GStringChunk* text; /* summary text */
} expert_tapdata_t;
/* Reset expert stats */
static void
expert_stat_reset(void *tapdata)
{
gint n;
expert_tapdata_t *etd = tapdata;
/* Free & reallocate chunk of strings */
g_string_chunk_free(etd->text);
etd->text = g_string_chunk_new(100);
/* Empty each of the arrays */
for (n=0; n < max_level; n++) {
g_array_set_size(etd->ei_array[n], 0);
}
}
/* Process stat struct for an expert frame */
static int
expert_stat_packet(void *tapdata, packet_info *pinfo _U_, epan_dissect_t *edt _U_,
const void *pointer)
{
expert_info_t *ei = (expert_info_t *)pointer;
expert_tapdata_t *etd = tapdata;
severity_level_t severity_level;
switch (ei->severity) {
case PI_CHAT:
severity_level = chat_level;
break;
case PI_NOTE:
severity_level = note_level;
break;
case PI_WARN:
severity_level = warn_level;
break;
case PI_ERROR:
severity_level = error_level;
break;
default:
g_assert_not_reached();
return 0;
}
/* Add new item to end of list for severity level */
g_array_append_val(etd->ei_array[severity_level], *(expert_info_t *)pointer);
/* Get pointer to newly-allocated item */
ei = &g_array_index(etd->ei_array[severity_level], expert_info_t,
etd->ei_array[severity_level]->len - 1); /* ugly */
/* Copy/Store protocol and summary strings efficiently using GStringChunk */
ei->protocol = g_string_chunk_insert_const(etd->text, ei->protocol);
ei->summary = g_string_chunk_insert_const(etd->text, ei->summary);
return 1;
}
/* Output for all of the items of one severity */
static void draw_items_for_severity(GArray *items, const gchar *label)
{
guint n;
expert_info_t *ei;
/* Don't print title if no items */
if (items->len == 0) {
return;
}
/* Title */
printf("\n%s (%u)\n", label, items->len);
printf("=============\n");
/* Column headings */
printf(" Frame Group Protocol\n");
/* Items */
for (n=0; n < items->len; n++) {
ei = &g_array_index(items, expert_info_t, n);
printf("%8u %10s %18s %s\n", ei->packet_num,
val_to_str(ei->group, expert_group_vals, "Unknown"),
ei->protocol, ei->summary);
}
}
/* (Re)draw expert stats */
static void
expert_stat_draw(void *phs _U_)
{
/* Look up the statistics struct */
expert_tapdata_t *hs = (expert_tapdata_t *)phs;
draw_items_for_severity(hs->ei_array[error_level], "Errors");
draw_items_for_severity(hs->ei_array[warn_level], "Warns");
draw_items_for_severity(hs->ei_array[note_level], "Notes");
draw_items_for_severity(hs->ei_array[chat_level], "Chats");
}
/* Create a new expert stats struct */
static void expert_stat_init(const char *optarg, void *userdata _U_)
{
const char *filter = NULL;
GString *error_string;
expert_tapdata_t *hs;
int n;
/* Check for a filter string */
if (strncmp(optarg, "expert,stat,", 13) == 0) {
/* Skip those characters from filter to display */
filter = optarg + 11;
}
else {
/* No filter */
filter = NULL;
}
/* Create top-level struct */
hs = g_malloc(sizeof(expert_tapdata_t));
memset(hs, 0, sizeof(expert_tapdata_t));
/* Allocate chunk of strings */
hs->text = g_string_chunk_new(100);
/* Allocate GArray for each severity level */
for (n=0; n < max_level; n++) {
hs->ei_array[n] = g_array_sized_new(FALSE, FALSE, sizeof(expert_info_t), 1000);
}
/**********************************************/
/* Register the tap listener */
/**********************************************/
error_string = register_tap_listener("expert", hs,
filter, 0,
expert_stat_reset,
expert_stat_packet,
expert_stat_draw);
if (error_string) {
g_string_free(error_string, TRUE);
g_free(hs);
exit(1);
}
}
/* Register this tap listener (need void on own so line register function found) */
void
register_tap_listener_expert_info(void)
{
register_stat_cmd_arg("expert,stat", expert_stat_init, NULL);
}
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