/* voip_calls_dlg.c
 * VoIP calls summary addition for Wireshark
 *
 * $Id: voip_calls_dlg.c 37035 2011-05-10 05:31:45Z etxrab $
 *
 * Copyright 2004, Ericsson , Spain
 * By Francisco Alcoba <francisco.alcoba@ericsson.com>
 *
 * based on h323_calls_dlg.c
 * Copyright 2004, Iskratel, Ltd, Kranj
 * By Miha Jemec <m.jemec@iskratel.si>
 *
 * H323, RTP and Graph Support
 * By Alejandro Vaquero, alejandro.vaquero@verso.com
 * Copyright 2005, Verso Technologies Inc.
 *
 * 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>
#include <string.h>
#include <ctype.h>

#include "gtk/gtk.h"

#include <epan/epan.h>
#include <epan/packet.h>
#include "epan/filesystem.h"
#include <epan/tap.h>
#include <epan/stat_cmd_args.h>
#include <epan/to_str.h>
#include <epan/address.h>
#include <epan/addr_resolv.h>
#include <epan/dissectors/packet-h248.h>

#include "../globals.h"
#include "../stat_menu.h"

#include "gtk/graph_analysis.h"
#include "gtk/voip_calls_dlg.h"
#include "gtk/voip_calls.h"
#include "gtk/gui_stat_menu.h"
#include "gtk/dlg_utils.h"
#include "gtk/gui_utils.h"
#include "gtk/gtkglobals.h"
#include "gtk/stock_icons.h"

#include "simple_dialog.h"

#ifdef HAVE_LIBPORTAUDIO
#include "gtk/rtp_analysis.h"
#include "gtk/rtp_player.h"
#endif /* HAVE_LIBPORTAUDIO */


/****************************************************************************/
/* pointer to the one and only dialog window */
static GtkWidget *voip_calls_dlg = NULL;

static GtkListStore *list_store  = NULL;
static GtkTreeIter list_iter;
static GtkWidget *list           = NULL;

static GtkWidget *top_label      = NULL;
static GtkWidget *status_label   = NULL;

/*static GtkWidet *bt_unselect   = NULL;*/
static GtkWidget *bt_filter      = NULL;
static GtkWidget *bt_graph       = NULL;
#ifdef HAVE_LIBPORTAUDIO
static GtkWidget *bt_player      = NULL;
#endif /* HAVE_LIBPORTAUDIO */

static guint32 calls_nb = 0;     /* number of displayed calls */
static guint32 calls_ns = 0;     /* number of selected calls */

static graph_analysis_data_t *graph_analysis_data = NULL;

enum
{
	CALL_COL_START_TIME,
	CALL_COL_STOP_TIME,
	CALL_COL_INITIAL_SPEAKER,
	CALL_COL_FROM,
	CALL_COL_TO,
	CALL_COL_PROTOCOL,
	CALL_COL_PACKETS,
	CALL_COL_STATE,
	CALL_COL_COMMENTS,
	CALL_COL_DATA,
	NUM_COLS /* The number of columns */
};


/****************************************************************************/
static void
voip_calls_remove_tap_listener(void)
{
	/* Remove the calls tap listener */
	remove_tap_listener_sip_calls();
	remove_tap_listener_isup_calls();
	remove_tap_listener_mtp3_calls();
	remove_tap_listener_h225_calls();
	remove_tap_listener_h245dg_calls();
	remove_tap_listener_q931_calls();
	remove_tap_listener_h248_calls();
	remove_tap_listener_sccp_calls();
	remove_tap_listener_sdp_calls();
	remove_tap_listener_rtp();
	if (find_tap_id("unistim")) { /* The plugin may be missing */
		remove_tap_listener_unistim_calls();
	}
	if (find_tap_id("voip")) {
		remove_tap_listener_voip_calls();
	}
	remove_tap_listener_rtp_event();
	remove_tap_listener_mgcp_calls();
	remove_tap_listener_actrace_calls();
	remove_tap_listener_skinny_calls();
	remove_tap_listener_iax2_calls();
	remove_tap_listener_t38();
}

/****************************************************************************/
/* CALLBACKS                                                                */
/****************************************************************************/
static void
voip_calls_on_destroy(GtkObject *object _U_, gpointer user_data _U_)
{
	/* remove_tap_listeners */
	voip_calls_remove_tap_listener();

	/* Clean up memory used by calls tap */
	voip_calls_dlg_reset(NULL);

	/* Note that we no longer have a "VoIP Calls" dialog box. */
	voip_calls_dlg = NULL;

	/* Clean up graph analysis memory */
	g_free(graph_analysis_data);
	graph_analysis_data = NULL;
}

/****************************************************************************/
static void
voip_calls_on_unselect(GtkButton *button _U_, gpointer user_data _U_)
{
	/*gtk_widget_set_sensitive(bt_unselect, FALSE);*/
	gtk_widget_set_sensitive(bt_filter, FALSE);
	gtk_widget_set_sensitive(bt_graph, FALSE);
#ifdef HAVE_LIBPORTAUDIO
	gtk_widget_set_sensitive(bt_player, FALSE);
#endif /* HAVE_LIBPORTAUDIO */
}

/****************************************************************************/
static void
voip_calls_on_filter(GtkButton *button _U_, gpointer user_data _U_)
{
	gchar *filter_string;
	GString *filter_string_fwd;
	const gchar *filter_prepend;
	gboolean is_first = TRUE;
	GList* lista;
	GList* listb;
	voip_calls_info_t *listinfo;
	graph_analysis_item_t *gai;
	size_t filter_length;
	size_t max_filter_length = 2048; /* What's this based on ? */
	int pos;

	const sip_calls_info_t *sipinfo;
	const isup_calls_info_t *isupinfo;
	const h323_calls_info_t *h323info;
	const h245_address_t *h245_add = NULL;
	const gcp_ctx_t* ctx;

	filter_string = g_strdup(gtk_entry_get_text(GTK_ENTRY(main_display_filter_widget)));
	filter_length = strlen(filter_string);
	pos = (int)filter_length;	/* we assume the filter won't be more than 2^31-1 octets long */
	g_strstrip(filter_string);

	if (strlen(filter_string) > 0)
		filter_prepend = " or ";
	else
		filter_prepend = "";
	g_free(filter_string);

	filter_string_fwd = g_string_new(filter_prepend);

	/* look in the Graph and get all the frame_num for this call */
	g_string_append_printf(filter_string_fwd, "(");

	/* Build a new filter based on frame numbers */
	lista = g_list_first(voip_calls_get_info()->callsinfo_list);
	while (lista) {
		listinfo = lista->data;
		if (listinfo->selected) {
			listb = g_list_first(voip_calls_get_info()->graph_analysis->list);
			while (listb) {
				gai = listb->data;
				if (gai->conv_num == listinfo->call_num) {
					g_string_append_printf(filter_string_fwd, "%sframe.number == %u", is_first?"":" or ", gai->frame_num);
					is_first = FALSE;
				}
				listb = g_list_next(listb);
			}
		}
		lista = g_list_next(lista);
	}

	g_string_append_printf(filter_string_fwd, ")");
	filter_length += filter_string_fwd->len;

	if (filter_length < max_filter_length) {
		gtk_editable_insert_text(GTK_EDITABLE(main_display_filter_widget), filter_string_fwd->str, -1, &pos);
	} else {
		g_string_free(filter_string_fwd, TRUE);
		filter_string_fwd = g_string_new(filter_prepend);

		g_string_append_printf(filter_string_fwd, "(");
		is_first = TRUE;
		/* Build a new filter based on protocol fields */
		lista = g_list_first(voip_calls_get_info()->callsinfo_list);
		while (lista) {
			listinfo = lista->data;
			if (listinfo->selected) {
				if (!is_first)
					g_string_append_printf(filter_string_fwd, " or ");
				switch (listinfo->protocol) {
				case VOIP_SIP:
					sipinfo = listinfo->prot_info;
					g_string_append_printf(filter_string_fwd,
						"(sip.Call-ID == \"%s\")",
						sipinfo->call_identifier
					);
					break;
				case VOIP_ISUP:
					isupinfo = listinfo->prot_info;
					g_string_append_printf(filter_string_fwd,
						"(isup.cic == %i and frame.number >= %i and frame.number <= %i and mtp3.network_indicator == %i and ((mtp3.dpc == %i) and (mtp3.opc == %i)) or ((mtp3.dpc == %i) and (mtp3.opc == %i)))",
						isupinfo->cic, listinfo->first_frame_num,
						listinfo->last_frame_num,
						isupinfo->ni, isupinfo->dpc, isupinfo->opc,
						isupinfo->opc, isupinfo->dpc
					);
					break;
				case VOIP_H323:
					h323info = listinfo->prot_info;
					g_string_append_printf(filter_string_fwd,
						"((h225.guid == %s || q931.call_ref == %x:%x || q931.call_ref == %x:%x)",
						guid_to_str(&h323info->guid[0]),
						(guint8) (h323info->q931_crv & 0x00ff),
						(guint8)((h323info->q931_crv & 0xff00)>>8),
						(guint8) (h323info->q931_crv2 & 0x00ff),
						(guint8)((h323info->q931_crv2 & 0xff00)>>8));
					listb = g_list_first(h323info->h245_list);
					while (listb) {
						h245_add = listb->data;
						g_string_append_printf(filter_string_fwd,
							" || (ip.addr == %s && tcp.port == %d && h245)",
							ip_to_str((guint8 *)(h245_add->h245_address.data)), h245_add->h245_port);
						listb = g_list_next(listb);
					}
					g_string_append_printf(filter_string_fwd, ")");
					break;
				case TEL_H248:
					ctx = listinfo->prot_info;
					g_string_append_printf(filter_string_fwd,
						"(h248.ctx == 0x%x)", ctx->id);
					break;
				default:
					/* placeholder to assure valid display filter expression */
					g_string_append_printf(filter_string_fwd,
						"(frame)");
					break;
				}
				is_first = FALSE;
			}
			lista = g_list_next(lista);
		}

		g_string_append_printf(filter_string_fwd, ")");
		gtk_editable_insert_text(GTK_EDITABLE(main_display_filter_widget), filter_string_fwd->str, -1, &pos);
	}

	g_string_free(filter_string_fwd, TRUE);
}

/****************************************************************************/
static void
voip_calls_on_select_all(GtkButton *button _U_, gpointer user_data _U_)
{
	GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(list));
	gtk_tree_selection_select_all(selection);
}

/****************************************************************************/
static void
on_graph_bt_clicked(GtkButton *button _U_, gpointer user_data _U_)
{
	graph_analysis_item_t *gai;
	GList* lista;
	GList* listb;
	voip_calls_info_t *listinfo;

	/* reset the "display" parameter in graph analysis */
	listb = g_list_first(voip_calls_get_info()->graph_analysis->list);
	while (listb) {
		gai = listb->data;
		gai->display = FALSE;
		listb = g_list_next(listb);
	}

	/* set the display for selected calls */
	lista = g_list_first(voip_calls_get_info()->callsinfo_list);
	while (lista) {
		listinfo = lista->data;
		if (listinfo->selected) {
			listb = g_list_first(voip_calls_get_info()->graph_analysis->list);
			while (listb) {
				gai = listb->data;
				if (gai->conv_num == listinfo->call_num) {
					gai->display = TRUE;
				}
				listb = g_list_next(listb);
			}
		}
		lista = g_list_next(lista);
	}

	/* create or refresh the graph windows */
	if (graph_analysis_data->dlg.window == NULL)
		graph_analysis_create(graph_analysis_data);  /* create the window */
	else
		graph_analysis_update(graph_analysis_data);  /* refresh it */
}

/****************************************************************************/
#ifdef HAVE_LIBPORTAUDIO
static void
on_player_bt_clicked(GtkButton *button _U_, gpointer user_data _U_)
{
	rtp_player_init(voip_calls_get_info());
}
#endif /* HAVE_LIBPORTAUDIO */

/****************************************************************************/
/* when the user selects a row in the calls list */
static gboolean
voip_calls_mark_selected(GtkTreeModel *model, GtkTreePath *path _U_, GtkTreeIter *iter, gpointer data)
{
	GtkTreeSelection *selection = (GtkTreeSelection *)data;
	voip_calls_info_t* strinfo;

	gtk_tree_model_get(model, iter, CALL_COL_DATA, &strinfo, -1);
	strinfo->selected = gtk_tree_selection_iter_is_selected(selection, iter);

	return FALSE;
}

static void
voip_calls_on_select_row_cb(GtkTreeSelection *selection, gpointer data _U_)
{
	gchar label_text[80];

	gtk_tree_model_foreach(GTK_TREE_MODEL(list_store), voip_calls_mark_selected, selection);

	calls_ns = gtk_tree_selection_count_selected_rows(selection);

	g_snprintf(label_text, 80,
			"Detected %u VoIP %s. Selected %u %s.",
			calls_nb,
			plurality(calls_nb, "Call", "Calls"),
			calls_ns,
			plurality(calls_ns, "Call", "Calls"));
	gtk_label_set_text(GTK_LABEL(top_label), label_text);

	gtk_widget_set_sensitive(bt_filter, calls_ns ? TRUE : FALSE);
	gtk_widget_set_sensitive(bt_graph, calls_ns ? TRUE : FALSE);
#ifdef HAVE_LIBPORTAUDIO
	gtk_widget_set_sensitive(bt_player, calls_ns ? TRUE : FALSE);
#endif /* HAVE_LIBPORTAUDIO */
}

/****************************************************************************/
/* Tree view constructors                                                   */
/****************************************************************************/
/* append a line to list */
static void
add_to_list_store(voip_calls_info_t* strinfo)
{
	gchar field[NUM_COLS][50];
	isup_calls_info_t *isupinfo;
	h323_calls_info_t *h323info;
	gboolean flag = FALSE;

	g_snprintf(field[CALL_COL_INITIAL_SPEAKER], 30, "%s", get_addr_name(&(strinfo->initial_speaker)));
	g_snprintf(field[CALL_COL_FROM],            50, "%s", strinfo->from_identity);
	g_snprintf(field[CALL_COL_TO],              50, "%s", strinfo->to_identity);
	g_snprintf(field[CALL_COL_PROTOCOL],        15, "%s",
		   ((strinfo->protocol==VOIP_COMMON)&&strinfo->protocol_name)?
		       strinfo->protocol_name:voip_protocol_name[strinfo->protocol]);
	g_snprintf(field[CALL_COL_STATE],           15, "%s", voip_call_state_name[strinfo->call_state]);

	/* Add comments based on the protocol */
	switch (strinfo->protocol) {
		case VOIP_ISUP:
			isupinfo = strinfo->prot_info;
			g_snprintf(field[CALL_COL_COMMENTS],30, "%i-%i -> %i-%i", isupinfo->ni, isupinfo->opc,
				isupinfo->ni, isupinfo->dpc);
			break;
		case VOIP_H323:
			h323info = strinfo->prot_info;
			if (strinfo->call_state == VOIP_CALL_SETUP)
				flag = h323info->is_faststart_Setup;
			else
				if ((h323info->is_faststart_Setup == TRUE) && (h323info->is_faststart_Proc == TRUE))
					flag = TRUE;
			g_snprintf(field[CALL_COL_COMMENTS],35, "Tunneling: %s  Fast Start: %s",
				   (h323info->is_h245Tunneling==TRUE?"ON":"OFF"),
				   (flag==TRUE?"ON":"OFF"));
			break;
		case VOIP_COMMON:
			field[CALL_COL_COMMENTS][0]='\0';
			if (strinfo->call_comment)
				g_snprintf(field[CALL_COL_COMMENTS],30, "%s", strinfo->call_comment);
			break;
		default:
			field[CALL_COL_COMMENTS][0]='\0';
	}

	/* Acquire an iterator */
	gtk_list_store_append(list_store, &list_iter);

	/* Fill the new row */
	gtk_list_store_set(list_store, &list_iter,
			   CALL_COL_START_TIME,       nstime_to_sec(&strinfo->start_rel),
			   CALL_COL_STOP_TIME,        nstime_to_sec(&strinfo->stop_rel),
			   CALL_COL_INITIAL_SPEAKER,  &field[CALL_COL_INITIAL_SPEAKER][0],
			   CALL_COL_FROM,             &field[CALL_COL_FROM][0],
			   CALL_COL_TO,               &field[CALL_COL_TO][0],
			   CALL_COL_PROTOCOL,         &field[CALL_COL_PROTOCOL][0],
			   CALL_COL_PACKETS,          strinfo->npackets,
			   CALL_COL_STATE,            &field[CALL_COL_STATE][0],
			   CALL_COL_COMMENTS,         &field[CALL_COL_COMMENTS][0],
			   CALL_COL_DATA,             strinfo,
			   -1);

        calls_nb += 1;
}

/****************************************************************************/
/* Create list view */
static void
create_list_view(void)
{
	GtkTreeViewColumn *column;
	GtkCellRenderer   *renderer;
	GtkTreeSortable   *sortable;
	GtkTreeView       *list_view;
	GtkTreeSelection  *selection;

	/* Create the store */
	list_store = gtk_list_store_new(NUM_COLS,       /* Total number of columns XXX */
					G_TYPE_DOUBLE,  /* Start Time */
					G_TYPE_DOUBLE,  /* Stop Time */
					G_TYPE_STRING,  /* Initial Speaker */
					G_TYPE_STRING,  /* From */
					G_TYPE_STRING,  /* To */
					G_TYPE_STRING,  /* Protocol */
					G_TYPE_UINT,    /* Packets */
					G_TYPE_STRING,  /* State */
					G_TYPE_STRING,  /* Comments */
					G_TYPE_POINTER  /* Data */
				       );

	/* Create a view */
	list = gtk_tree_view_new_with_model(GTK_TREE_MODEL(list_store));

	/* The view now holds a reference.  We can get rid of our own reference */
	g_object_unref(G_OBJECT(list_store));

	list_view = GTK_TREE_VIEW(list);
	sortable = GTK_TREE_SORTABLE(list_store);

#if GTK_CHECK_VERSION(2,6,0)
	/* Speed up the list display */
	gtk_tree_view_set_fixed_height_mode(list_view, TRUE);
#endif

	/* Setup the sortable columns */
	gtk_tree_sortable_set_sort_column_id(sortable, CALL_COL_START_TIME, GTK_SORT_ASCENDING);
	gtk_tree_view_set_headers_clickable(list_view, FALSE);

	/* Start Time */
	renderer = gtk_cell_renderer_text_new();
	g_object_set(G_OBJECT(renderer), "xalign", 1.0, NULL);  /* right align  */
	g_object_set(G_OBJECT(renderer), "xpad", 10, NULL);
	column = gtk_tree_view_column_new_with_attributes("Start Time", renderer,
		"text", CALL_COL_START_TIME,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_START_TIME);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 60);
	gtk_tree_view_column_set_fixed_width(column, 100);
	/* Add the column to the view. */
	gtk_tree_view_append_column(list_view, column);

	/* Stop Time */
	renderer = gtk_cell_renderer_text_new();
	g_object_set(G_OBJECT(renderer), "xalign", 1.0, NULL);  /* right align  */
	g_object_set(G_OBJECT(renderer), "xpad", 10, NULL);
	column = gtk_tree_view_column_new_with_attributes("Stop Time", renderer,
		"text", CALL_COL_STOP_TIME,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_STOP_TIME);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 60);
	gtk_tree_view_column_set_fixed_width(column, 100);
	gtk_tree_view_append_column(list_view, column);

	/* Initial Speaker */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("Initial Speaker", renderer,
		"text", CALL_COL_INITIAL_SPEAKER,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_INITIAL_SPEAKER);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 80);
	gtk_tree_view_column_set_fixed_width(column, 120);
	gtk_tree_view_append_column(list_view, column);

	/* From */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("From", renderer,
		"text", CALL_COL_FROM,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_FROM);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 130);
	gtk_tree_view_column_set_fixed_width(column, 140);
	gtk_tree_view_append_column(list_view, column);

	/* To */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("To", renderer,
		"text", CALL_COL_TO,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_TO);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 130);
	gtk_tree_view_column_set_fixed_width(column, 140);
	gtk_tree_view_append_column(list_view, column);

	/* Protocol */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("Protocol", renderer,
		"text", CALL_COL_PROTOCOL,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_PROTOCOL);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 50);
	gtk_tree_view_column_set_fixed_width(column, 80);
	gtk_tree_view_append_column(list_view, column);

	/* Packets */
	renderer = gtk_cell_renderer_text_new();
	g_object_set(G_OBJECT(renderer), "xalign", 1.0, NULL);  /* right align numbers */
	g_object_set(G_OBJECT(renderer), "xpad", 10, NULL);
	column = gtk_tree_view_column_new_with_attributes("Packets", renderer,
		"text", CALL_COL_PACKETS,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_PACKETS);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 70);
	gtk_tree_view_column_set_fixed_width(column, 80);
	gtk_tree_view_append_column(list_view, column);

	/* State */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("State", renderer,
		"text", CALL_COL_STATE,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_STATE);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 60);
	gtk_tree_view_column_set_fixed_width(column, 80);
	gtk_tree_view_append_column(list_view, column);

	/* Comments */
	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes("Comments", renderer,
		"text", CALL_COL_COMMENTS,
		NULL);
	gtk_tree_view_column_set_sort_column_id(column, CALL_COL_COMMENTS);
	gtk_tree_view_column_set_resizable(column, TRUE);
	gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
	gtk_tree_view_column_set_min_width(column, 100);
	gtk_tree_view_column_set_fixed_width(column, 140);
	gtk_tree_view_append_column(list_view, column);

	/* Now enable the sorting of each column */
	gtk_tree_view_set_rules_hint(list_view, TRUE);
	gtk_tree_view_set_headers_clickable(list_view, TRUE);

	/* Setup the selection handler */
	selection = gtk_tree_view_get_selection(list_view);
	gtk_tree_selection_set_mode(selection, GTK_SELECTION_MULTIPLE);

	g_signal_connect(G_OBJECT(selection), "changed", /* select_row */
			 G_CALLBACK(voip_calls_on_select_row_cb),
			 NULL);

}

/****************************************************************************/
/* INTERFACE                                                                */
/****************************************************************************/
static void
voip_calls_dlg_create(void)
{
	GtkWidget *voip_calls_dlg_w;
	GtkWidget *main_vb;
	GtkWidget *scrolledwindow;
	GtkWidget *hbuttonbox;
	GtkWidget *bt_close;
	GtkWidget *bt_select_all;
	GtkTooltips *tooltips = gtk_tooltips_new();
	const gchar *title_name_ptr;
	gchar *win_name;

	title_name_ptr = cf_get_display_name(&cfile);
	win_name = g_strdup_printf("%s - VoIP Calls", title_name_ptr);
	voip_calls_dlg_w = dlg_window_new(win_name);  /* transient_for top_level */
	gtk_window_set_destroy_with_parent(GTK_WINDOW(voip_calls_dlg_w), TRUE);

	gtk_window_set_default_size(GTK_WINDOW(voip_calls_dlg_w), 1000, 350);

	main_vb = gtk_vbox_new(FALSE, 0);
	gtk_container_add(GTK_CONTAINER(voip_calls_dlg_w), main_vb);
	gtk_container_set_border_width(GTK_CONTAINER (main_vb), 12);

	top_label = gtk_label_new("Detected 0 VoIP Calls. Selected 0 Calls.");
	gtk_box_pack_start(GTK_BOX (main_vb), top_label, FALSE, FALSE, 8);

	scrolledwindow = scrolled_window_new(NULL, NULL);
	gtk_box_pack_start(GTK_BOX (main_vb), scrolledwindow, TRUE, TRUE, 0);

	create_list_view();
	gtk_container_add(GTK_CONTAINER(scrolledwindow), list);
	gtk_widget_show(voip_calls_dlg_w);

	status_label = gtk_label_new("Total: Calls: 0   Start packets: 0   Completed calls: 0   Rejected calls: 0");
	gtk_box_pack_start(GTK_BOX(main_vb), status_label, FALSE, FALSE, 8);

	/* button row */
	hbuttonbox = gtk_hbutton_box_new();
	gtk_box_pack_start(GTK_BOX(main_vb), hbuttonbox, FALSE, FALSE, 0);
	gtk_button_box_set_layout(GTK_BUTTON_BOX (hbuttonbox), GTK_BUTTONBOX_SPREAD);
	gtk_box_set_spacing(GTK_BOX(hbuttonbox), 30);

	/*bt_unselect = gtk_button_new_with_label ("Unselect");
	gtk_container_add (GTK_CONTAINER (hbuttonbox), bt_unselect);
	gtk_tooltips_set_tip (tooltips, bt_unselect, "Unselect this conversation", NULL);*/

	bt_filter = gtk_button_new_from_stock(WIRESHARK_STOCK_PREPARE_FILTER);
	gtk_container_add(GTK_CONTAINER(hbuttonbox), bt_filter);
	gtk_tooltips_set_tip(tooltips, bt_filter, "Prepare a display filter of the selected conversation", NULL);

	bt_graph = gtk_button_new_from_stock(WIRESHARK_STOCK_VOIP_FLOW);
	gtk_container_add(GTK_CONTAINER(hbuttonbox), bt_graph);
	gtk_widget_show(bt_graph);
	g_signal_connect(bt_graph, "clicked", G_CALLBACK(on_graph_bt_clicked), NULL);
	gtk_tooltips_set_tip(tooltips, bt_graph, "Show a flow graph of the selected calls.", NULL);

#ifdef HAVE_LIBPORTAUDIO
	bt_player = gtk_button_new_from_stock(WIRESHARK_STOCK_AUDIO_PLAYER);
	gtk_container_add(GTK_CONTAINER(hbuttonbox), bt_player);
	gtk_widget_show(bt_player);
	g_signal_connect(bt_player, "clicked", G_CALLBACK(on_player_bt_clicked), NULL);
	gtk_tooltips_set_tip(tooltips, bt_player, "Launch the RTP player to listen the selected calls.", NULL);
#endif /* HAVE_LIBPORTAUDIO */

#if GTK_CHECK_VERSION(2,10,0)
	bt_select_all = gtk_button_new_from_stock(GTK_STOCK_SELECT_ALL);
#else
	bt_select_all = gtk_button_new_with_label("Select All");
#endif
	gtk_container_add(GTK_CONTAINER(hbuttonbox), bt_select_all);
	GTK_WIDGET_SET_FLAGS(bt_select_all, GTK_CAN_DEFAULT);
	gtk_tooltips_set_tip(tooltips, bt_select_all, "Select all the calls", NULL);

	bt_close = gtk_button_new_from_stock(GTK_STOCK_CLOSE);
	gtk_container_add(GTK_CONTAINER (hbuttonbox), bt_close);
	GTK_WIDGET_SET_FLAGS(bt_close, GTK_CAN_DEFAULT);
	gtk_tooltips_set_tip(tooltips, bt_close, "Close this dialog", NULL);

	/*g_signal_connect(bt_unselect, "clicked", G_CALLBACK(voip_calls_on_unselect), NULL);*/
	g_signal_connect(bt_filter, "clicked", G_CALLBACK(voip_calls_on_filter), NULL);

	window_set_cancel_button(voip_calls_dlg_w, bt_close, window_cancel_button_cb);

	g_signal_connect(voip_calls_dlg_w, "delete_event", G_CALLBACK(window_delete_event_cb), NULL);
	g_signal_connect(voip_calls_dlg_w, "destroy", G_CALLBACK(voip_calls_on_destroy), NULL);
	g_signal_connect(bt_select_all, "clicked", G_CALLBACK(voip_calls_on_select_all), NULL);

	gtk_widget_show_all(voip_calls_dlg_w);
	window_present(voip_calls_dlg_w);

	voip_calls_on_unselect(NULL, NULL);

	voip_calls_dlg = voip_calls_dlg_w;

	g_free(win_name);
}


/****************************************************************************/
/* PUBLIC                                                                   */
/****************************************************************************/

/****************************************************************************/
/* update the contents of the list view */
/* list: pointer to list of voip_calls_info_t* */
void
voip_calls_dlg_update(GList *listx)
{
	gchar label_text[256];
	if (voip_calls_dlg != NULL) {
		calls_nb = 0;
		calls_ns = 0;
		gtk_list_store_clear(list_store);

		g_snprintf(label_text, sizeof(label_text),
			"Total: Calls: %u   Start packets: %u   Completed calls: %u   Rejected calls: %u",
			g_list_length(voip_calls_get_info()->callsinfo_list),
			voip_calls_get_info()->start_packets,
			voip_calls_get_info()->completed_calls,
			voip_calls_get_info()->rejected_calls);
		gtk_label_set_text(GTK_LABEL(status_label), label_text);

		listx = g_list_first(listx);
		while (listx) {
			add_to_list_store((voip_calls_info_t*)(listx->data));
			listx = g_list_next(listx);
		}

		g_snprintf(label_text, sizeof(label_text),
			"Detected %u VoIP %s. Selected %u %s.",
			calls_nb,
			plurality(calls_nb, "Call", "Calls"),
			calls_ns,
			plurality(calls_ns, "Call", "Calls"));
		gtk_label_set_text(GTK_LABEL(top_label), label_text);
	}
}

/****************************************************************************/
/* draw function for tap listeners to keep the window up to date */
void
voip_calls_dlg_draw(void *ptr _U_)
{
	if (voip_calls_get_info()->redraw) {
		voip_calls_dlg_update(voip_calls_get_info()->callsinfo_list);
		voip_calls_get_info()->redraw = FALSE;
	}
}

/****************************************************************************/
/* reset function for tap listeners to clear window, if necessary */
void
voip_calls_dlg_reset(void *ptr _U_)
{
	/* Clean up memory used by calls tap */
	voip_calls_reset(voip_calls_get_info());

	/* close the graph window if open */
	if (graph_analysis_data && graph_analysis_data->dlg.window != NULL) {
		window_cancel_button_cb(NULL, graph_analysis_data->dlg.window);
		graph_analysis_data->dlg.window = NULL;
	}
}

/****************************************************************************/
/* init function for tap */
static void
voip_calls_init_tap(const char *dummy _U_, void* userdata _U_)
{
	if (graph_analysis_data == NULL) {
		graph_analysis_data_init();
		/* init the Graph Analysys */
		graph_analysis_data = graph_analysis_init();
		graph_analysis_data->graph_info = voip_calls_get_info()->graph_analysis;
	}

	/* Clean up memory used by calls tap */
	voip_calls_reset(voip_calls_get_info());

	/* Register the tap listener */
	sip_calls_init_tap();
	mtp3_calls_init_tap();
	isup_calls_init_tap();
	h225_calls_init_tap();
	h245dg_calls_init_tap();
	q931_calls_init_tap();
	h248_calls_init_tap();
	sccp_calls_init_tap();
	sdp_calls_init_tap();
	/* We don't register this tap, if we don't have the unistim plugin loaded.*/
	if (find_tap_id("unistim")) {
		unistim_calls_init_tap();
	}
	if (find_tap_id("voip")) {
		VoIPcalls_init_tap();
	}
	rtp_init_tap();
	rtp_event_init_tap();
	mgcp_calls_init_tap();
	actrace_calls_init_tap();
	skinny_calls_init_tap();
	iax2_calls_init_tap();
	t38_init_tap();

	/* create dialog box if necessary */
	if (voip_calls_dlg == NULL) {
		voip_calls_dlg_create();
	} else {
		/* There's already a dialog box; reactivate it. */
		reactivate_window(voip_calls_dlg);
	}

	voip_calls_get_info()->redraw = TRUE;
	voip_calls_dlg_draw(NULL);
	voip_calls_get_info()->redraw = TRUE;

	/* Scan for VoIP calls calls (redissect all packets) */
	cf_retap_packets(&cfile);
	gdk_window_raise(voip_calls_dlg->window);
	/* Tap listener will be removed and cleaned up in voip_calls_on_destroy */
}


/****************************************************************************/
/* entry point when called via the GTK menu */
#ifdef MAIN_MENU_USE_UIMANAGER
void
voip_calls_launch(GtkAction *action _U_, gpointer user_data _U_)
{
	voip_calls_init_tap("", NULL);
}
#else
static void
voip_calls_launch(GtkWidget *w _U_, gpointer data _U_)
{
	voip_calls_init_tap("", NULL);
}
#endif

/****************************************************************************/
void
register_tap_listener_voip_calls_dlg(void)
{
	register_stat_cmd_arg("voip,calls", voip_calls_init_tap, NULL);
#ifdef MAIN_MENU_USE_UIMANAGER
#else
	register_stat_menu_item_stock("_VoIP Calls",
		REGISTER_STAT_GROUP_TELEPHONY, WIRESHARK_STOCK_TELEPHONE,
		voip_calls_launch, NULL, NULL, NULL);
#endif
}
