nexmon – Rev 1
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/* srt_table.c
* Helper routines common to all SRT taps.
*
* 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 <string.h>
#include "proto.h"
#include "packet_info.h"
#include "srt_table.h"
struct register_srt {
int proto_id; /* protocol id (0-indexed) */
const char* tap_listen_str; /* string used in register_tap_listener (NULL to use protocol name) */
int max_tables; /* Maximum number of tables expected (used by GUI to determine how to display tables) */
tap_packet_cb srt_func; /* function to be called for new incoming packets for SRT */
srt_init_cb srt_init; /* function to create dissector SRT tables */
srt_param_handler_cb param_cb; /* function to parse parameters of optional arguments of tap string */
void* param_data; /* Storage for tap parameter data */
};
int get_srt_proto_id(register_srt_t* srt)
{
if (!srt) {
return -1;
}
return srt->proto_id;
}
const char* get_srt_tap_listener_name(register_srt_t* srt)
{
return srt->tap_listen_str;
}
int get_srt_max_tables(register_srt_t* srt)
{
return srt->max_tables;
}
tap_packet_cb get_srt_packet_func(register_srt_t* srt)
{
return srt->srt_func;
}
void set_srt_table_param_data(register_srt_t* srt, void* data)
{
srt->param_data = data;
}
void* get_srt_table_param_data(register_srt_t* srt)
{
return srt->param_data;
}
void
free_srt_table_data(srt_stat_table *rst)
{
int i;
for(i=0;i<rst->num_procs;i++){
g_free(rst->procedures[i].procedure);
rst->procedures[i].procedure=NULL;
}
g_free(rst->filter_string);
rst->filter_string=NULL;
g_free(rst->procedures);
rst->procedures=NULL;
rst->num_procs=0;
}
void free_srt_table(register_srt_t *srt, GArray* srt_array, srt_gui_free_cb gui_callback, void *callback_data)
{
guint i = 0;
srt_stat_table *srt_table;
for (i = 0; i < srt_array->len; i++)
{
srt_table = g_array_index(srt_array, srt_stat_table*, i);
/* Give GUI the first crack at it before we clean up */
if (gui_callback)
gui_callback(srt_table, callback_data);
free_srt_table_data(srt_table);
}
/* Clear the tables */
g_array_set_size(srt_array, 0);
/* Clear out any possible parameter data */
g_free(srt->param_data);
srt->param_data = NULL;
}
static void reset_srt_table_data(srt_stat_table *rst)
{
int i;
for(i=0;i<rst->num_procs;i++){
time_stat_init(&rst->procedures[i].stats);
}
}
void reset_srt_table(GArray* srt_array, srt_gui_reset_cb gui_callback, void *callback_data)
{
guint i = 0;
srt_stat_table *srt_table;
for (i = 0; i < srt_array->len; i++)
{
srt_table = g_array_index(srt_array, srt_stat_table*, i);
/* Give GUI the first crack at it before we clean up */
if (gui_callback)
gui_callback(srt_table, callback_data);
reset_srt_table_data(srt_table);
}
}
static GSList *registered_srt_tables = NULL;
register_srt_t* get_srt_table_by_name(const char* name)
{
guint i, size = g_slist_length(registered_srt_tables);
register_srt_t* srt;
GSList *slist;
for (i = 0; i < size; i++) {
slist = g_slist_nth(registered_srt_tables, i);
srt = (register_srt_t*)slist->data;
if (strcmp(name, proto_get_protocol_filter_name(srt->proto_id)) == 0)
return srt;
}
return NULL;
}
gchar* srt_table_get_tap_string(register_srt_t* srt)
{
GString *cmd_str = g_string_new(proto_get_protocol_filter_name(srt->proto_id));
g_string_append(cmd_str, ",srt");
return g_string_free(cmd_str, FALSE);
}
void srt_table_get_filter(register_srt_t* srt, const char *opt_arg, const char **filter, char** err)
{
gchar* cmd_str = srt_table_get_tap_string(srt);
guint len = (guint32)strlen(cmd_str);
guint pos = len;
*filter=NULL;
*err = NULL;
if(!strncmp(opt_arg, cmd_str, len))
{
if (srt->param_cb != NULL)
{
pos = srt->param_cb(srt, opt_arg + len, err);
if (*err != NULL)
return;
if (pos > 0)
pos += len;
}
if (opt_arg[pos] == ',')
{
*filter = opt_arg + pos+1;
}
}
g_free(cmd_str);
}
void srt_table_dissector_init(register_srt_t* srt, GArray* srt_array, srt_gui_init_cb gui_callback, void *callback_data)
{
srt->srt_init(srt, srt_array, gui_callback, callback_data);
}
static gint
insert_sorted_by_table_name(gconstpointer aparam, gconstpointer bparam)
{
const register_srt_t *a = (const register_srt_t *)aparam;
const register_srt_t *b = (const register_srt_t *)bparam;
return g_ascii_strcasecmp(proto_get_protocol_short_name(find_protocol_by_id(a->proto_id)), proto_get_protocol_short_name(find_protocol_by_id(b->proto_id)));
}
void
register_srt_table(const int proto_id, const char* tap_listener, int max_tables, tap_packet_cb srt_packet_func, srt_init_cb init_cb, srt_param_handler_cb param_cb)
{
register_srt_t *table;
DISSECTOR_ASSERT(init_cb);
DISSECTOR_ASSERT(srt_packet_func);
table = g_new(register_srt_t,1);
table->proto_id = proto_id;
if (tap_listener != NULL)
table->tap_listen_str = tap_listener;
else
table->tap_listen_str = proto_get_protocol_filter_name(proto_id);
table->max_tables = max_tables;
table->srt_func = srt_packet_func;
table->srt_init = init_cb;
table->param_cb = param_cb;
table->param_data = NULL;
registered_srt_tables = g_slist_insert_sorted(registered_srt_tables, table, insert_sorted_by_table_name);
}
void srt_table_iterate_tables(GFunc func, gpointer user_data)
{
g_slist_foreach(registered_srt_tables, func, user_data);
}
srt_stat_table*
init_srt_table(const char *name, const char *short_name, GArray *srt_array, int num_procs, const char* proc_column_name,
const char *filter_string, srt_gui_init_cb gui_callback, void* gui_data, void* table_specific_data)
{
int i;
srt_stat_table *table = g_new(srt_stat_table, 1);
if(filter_string){
table->filter_string=g_strdup(filter_string);
} else {
table->filter_string=NULL;
}
table->name = name;
table->short_name = short_name;
table->proc_column_name = proc_column_name;
table->num_procs=num_procs;
table->procedures=(srt_procedure_t *)g_malloc(sizeof(srt_procedure_t)*num_procs);
for(i=0;i<num_procs;i++){
time_stat_init(&table->procedures[i].stats);
table->procedures[i].proc_index = 0;
table->procedures[i].procedure = NULL;
}
g_array_insert_val(srt_array, srt_array->len, table);
table->table_specific_data = table_specific_data;
if (gui_callback)
gui_callback(table, gui_data);
return table;
}
void
init_srt_table_row(srt_stat_table *rst, int indx, const char *procedure)
{
/* we have discovered a new procedure. Extend the table accordingly */
if(indx>=rst->num_procs){
int old_num_procs=rst->num_procs;
int i;
rst->num_procs=indx+1;
rst->procedures=(srt_procedure_t *)g_realloc(rst->procedures, sizeof(srt_procedure_t)*(rst->num_procs));
for(i=old_num_procs;i<rst->num_procs;i++){
time_stat_init(&rst->procedures[i].stats);
rst->procedures[i].proc_index = i;
rst->procedures[i].procedure=NULL;
}
}
rst->procedures[indx].proc_index = indx;
rst->procedures[indx].procedure=g_strdup(procedure);
}
void
add_srt_table_data(srt_stat_table *rst, int indx, const nstime_t *req_time, packet_info *pinfo)
{
srt_procedure_t *rp;
nstime_t t, delta;
g_assert(indx >= 0 && indx < rst->num_procs);
rp=&rst->procedures[indx];
/* calculate time delta between request and reply */
t=pinfo->abs_ts;
nstime_delta(&delta, &t, req_time);
time_stat_update(&rp->stats, &delta, pinfo);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/