/* h225_ras_srt.c
 * H.225 RAS Service Response Time statistics for Wireshar
 * Copyright 2003 Lars Roland
 *
 * 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 <gtk/gtk.h>

#include <epan/packet.h>
#include <epan/packet_info.h>
#include <epan/epan.h>
#include <epan/value_string.h>
#include <epan/tap.h>
#include <epan/dissectors/packet-h225.h>

#include "epan/timestats.h"
#include "ui/simple_dialog.h"
#include "../file.h"
#include "../stat_menu.h"

#include "ui/gtk/gui_stat_util.h"
#include "ui/gtk/dlg_utils.h"
#include "ui/gtk/tap_param_dlg.h"
#include "ui/gtk/gui_utils.h"
#include "ui/gtk/main.h"

#include "ui/gtk/old-gtk-compat.h"

void register_tap_listener_gtk_h225rassrt(void);
static void gtk_h225rassrt_init(const char *opt_arg, void *userdata);

static tap_param h225_rassrt_params[] = {
	{ PARAM_FILTER, "Filter", NULL }
};

static tap_param_dlg h225_rassrt_dlg = {
	"H.225 RAS Service Response Time",
	"h225,srt",
	gtk_h225rassrt_init,
	-1,
	G_N_ELEMENTS(h225_rassrt_params),
	h225_rassrt_params
};

/* following values represent the size of their valuestring arrays */
#define NUM_RAS_STATS 7

static const value_string ras_message_category[] = {
  {  0,	"Gatekeeper    "},
  {  1,	"Registration  "},
  {  2,	"UnRegistration"},
  {  3,	"Admission     "},
  {  4,	"Bandwidth     "},
  {  5,	"Disengage     "},
  {  6,	"Location      "},
  {  0, NULL }
};

typedef enum _ras_type {
	RAS_REQUEST,
	RAS_CONFIRM,
	RAS_REJECT,
	RAS_OTHER
}ras_type;

typedef enum _ras_category {
	RAS_GATEKEEPER,
	RAS_REGISTRATION,
	RAS_UNREGISTRATION,
	RAS_ADMISSION,
	RAS_BANDWIDTH,
	RAS_DISENGAGE,
	RAS_LOCATION,
	RAS_OTHERS
}ras_category;

/* Summary of response-time calculations*/
typedef struct _h225_rtd_t {
	guint32 open_req_num;
	guint32 disc_rsp_num;
	guint32 req_dup_num;
	guint32 rsp_dup_num;
	timestat_t stats;
} h225_rtd_t;

/* used to keep track of the statistics for an entire program interface */
typedef struct _h225rassrt_t {
	GtkWidget *win;
	GtkWidget *vbox;
	char *filter;
	GtkWidget *scrolled_window;
	GtkTreeView *table;
	h225_rtd_t ras_rtd[NUM_RAS_STATS];
} h225rassrt_t;


static void
h225rassrt_reset(void *phs)
{
	h225rassrt_t *hs=(h225rassrt_t *)phs;
	int i;

	for(i=0;i<NUM_RAS_STATS;i++) {
		hs->ras_rtd[i].stats.num = 0;
		hs->ras_rtd[i].stats.min_num = 0;
		hs->ras_rtd[i].stats.max_num = 0;
		hs->ras_rtd[i].stats.min.secs = 0;
        	hs->ras_rtd[i].stats.min.nsecs = 0;
        	hs->ras_rtd[i].stats.max.secs = 0;
        	hs->ras_rtd[i].stats.max.nsecs = 0;
        	hs->ras_rtd[i].stats.tot.secs = 0;
        	hs->ras_rtd[i].stats.tot.nsecs = 0;
		hs->ras_rtd[i].open_req_num = 0;
		hs->ras_rtd[i].disc_rsp_num = 0;
		hs->ras_rtd[i].req_dup_num = 0;
		hs->ras_rtd[i].rsp_dup_num = 0;
	}

}


static int
h225rassrt_packet(void *phs, packet_info *pinfo _U_, epan_dissect_t *edt _U_, const void *phi)
{
	h225rassrt_t *hs=(h225rassrt_t *)phs;
	const h225_packet_info *pi=(const h225_packet_info *)phi;

	ras_type rasmsg_type = RAS_OTHER;
	ras_category rascategory = RAS_OTHERS;

	if (pi->msg_type != H225_RAS || pi->msg_tag == -1) {
		/* No RAS Message or uninitialized msg_tag -> return */
		return 0;
	}

	if (pi->msg_tag < 21) {
		/* */
		rascategory = (ras_category)(pi->msg_tag / 3);
		rasmsg_type = (ras_type)(pi->msg_tag % 3);
	}
	else {
		/* No SRT yet (ToDo) */
		return 0;
	}

	switch(rasmsg_type) {

	case RAS_REQUEST:
		if(pi->is_duplicate){
			hs->ras_rtd[rascategory].req_dup_num++;
		}
		else {
			hs->ras_rtd[rascategory].open_req_num++;
		}
		break;

	case RAS_CONFIRM:
		/* no break - delay stats are identical for Confirm and Reject  */
	case RAS_REJECT:
		if(pi->is_duplicate){
			/* Duplicate is ignored */
			hs->ras_rtd[rascategory].rsp_dup_num++;
		}
		else if (!pi->request_available) {
			/* no request was seen, ignore response  */
			hs->ras_rtd[rascategory].disc_rsp_num++;
		}
		else {
			hs->ras_rtd[rascategory].open_req_num--;
			time_stat_update(&(hs->ras_rtd[rascategory].stats),&(pi->delta_time), pinfo);
		}
		break;

	default:
		return 0;
	}
	return 1;
}

static void
h225rassrt_draw(void *phs)
{
	h225rassrt_t *hs=(h225rassrt_t *)phs;
	int i;
	char str[3][256];
	GtkListStore *store;
	GtkTreeIter iter;

	/* Now print Message and Reason Counter Table */
	/* clear list before printing */
  	store = GTK_LIST_STORE(gtk_tree_view_get_model(hs->table));
  	gtk_list_store_clear(store);

	for(i=0;i<NUM_RAS_STATS;i++) {
		/* nothing seen, nothing to do */
		if(hs->ras_rtd[i].stats.num==0){
			continue;
		}
		g_snprintf(str[0], sizeof(char[256]),
				"%8.2f msec", nstime_to_msec(&(hs->ras_rtd[i].stats.min)));
		g_snprintf(str[1], sizeof(char[256]),
				"%8.2f msec", nstime_to_msec(&(hs->ras_rtd[i].stats.max)));
		g_snprintf(str[2], sizeof(char[256]),
				"%8.2f msec", get_average(&(hs->ras_rtd[i].stats.tot), hs->ras_rtd[i].stats.num));

		gtk_list_store_append(store, &iter);
		gtk_list_store_set(store, &iter,
			0, val_to_str(i,ras_message_category,"Other"),
			1, hs->ras_rtd[i].stats.num,
			2, str[0],
			3, str[1],
			4, str[2],
			5, hs->ras_rtd[i].stats.min_num,
			6, hs->ras_rtd[i].stats.max_num,
			7, hs->ras_rtd[i].open_req_num,
			8, hs->ras_rtd[i].disc_rsp_num,
			9, hs->ras_rtd[i].req_dup_num,
			10, hs->ras_rtd[i].rsp_dup_num,
			-1);
	}
}

static void
win_destroy_cb(GtkWindow *win _U_, gpointer data)
{
	h225rassrt_t *hs=(h225rassrt_t *)data;

	remove_tap_listener(hs);

	if(hs->filter){
		g_free(hs->filter);
		hs->filter=NULL;
	}
	g_free(hs);
}


static const stat_column titles[]={
	{G_TYPE_STRING, LEFT, "RAS-Type" },
	{G_TYPE_UINT, RIGHT,   "Measurements" },
	{G_TYPE_STRING, RIGHT, "Min RTT" },
	{G_TYPE_STRING, RIGHT, "Max RTT" },
	{G_TYPE_STRING, RIGHT, "Avg RTT" },
	{G_TYPE_UINT, RIGHT,  "Min in Frame" },
	{G_TYPE_UINT, RIGHT,  "Max in Frame" },
	{G_TYPE_UINT, RIGHT,  "Open Requests" },
	{G_TYPE_UINT, RIGHT,  "Discarded Responses" },
	{G_TYPE_UINT, RIGHT,  "Repeated Requests" },
	{G_TYPE_UINT, RIGHT,  "Repeated Responses"}
};

static void
gtk_h225rassrt_init(const char *opt_arg, void *userdata _U_)
{
	h225rassrt_t *hs;
	GString *error_string;
	GtkWidget *bbox;
	GtkWidget *close_bt;

	hs=(h225rassrt_t *)g_malloc(sizeof(h225rassrt_t));

	if(strncmp(opt_arg,"h225,srt,",9) == 0){
		hs->filter=g_strdup(opt_arg+9);
	} else {
		hs->filter=NULL;
	}

	h225rassrt_reset(hs);

	hs->win = dlg_window_new("h225-ras-srt");  /* transient_for top_level */
	gtk_window_set_destroy_with_parent (GTK_WINDOW(hs->win), TRUE);
	gtk_window_set_default_size(GTK_WINDOW(hs->win), 600, 300);

	hs->vbox=ws_gtk_box_new(GTK_ORIENTATION_VERTICAL, 3, FALSE);
	gtk_container_set_border_width(GTK_CONTAINER(hs->vbox), 12);

	init_main_stat_window(hs->win, hs->vbox, "H.225 RAS Service Response Time", hs->filter);

        /* init a scrolled window*/
	hs->scrolled_window = scrolled_window_new(NULL, NULL);

	hs->table = create_stat_table(hs->scrolled_window, hs->vbox, 11, titles);

	error_string=register_tap_listener("h225", hs, hs->filter, 0, h225rassrt_reset, h225rassrt_packet, h225rassrt_draw);
	if(error_string){
		simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s", error_string->str);
		g_string_free(error_string, TRUE);
		g_free(hs->filter);
		g_free(hs);
		return;
	}

	/* Button row. */
	bbox = dlg_button_row_new(GTK_STOCK_CLOSE, NULL);
	gtk_box_pack_end(GTK_BOX(hs->vbox), bbox, FALSE, FALSE, 0);

	close_bt = (GtkWidget *)g_object_get_data(G_OBJECT(bbox), GTK_STOCK_CLOSE);
	window_set_cancel_button(hs->win, close_bt, window_cancel_button_cb);

	g_signal_connect(hs->win, "delete_event", G_CALLBACK(window_delete_event_cb), NULL);
	g_signal_connect(hs->win, "destroy", G_CALLBACK(win_destroy_cb), hs);

	gtk_widget_show_all(hs->win);
	window_present(hs->win);

	cf_retap_packets(&cfile);
	gdk_window_raise(gtk_widget_get_window(hs->win));
}

void
register_tap_listener_gtk_h225rassrt(void)
{
	register_param_stat(&h225_rassrt_dlg, "H.225 RAS",
	    REGISTER_STAT_GROUP_RESPONSE_TIME);
}
