/*

Copyright (C) 2000 - 2004 Christian Kreibich <christian@whoop.org>.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies of the Software and its documentation and acknowledgment shall be
given in the documentation and software packages that this Software was
used.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/
#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#ifdef LINUX
#define __FAVOR_BSD
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <gtk/gtk.h>
#include <callbacks.h>
#include <nd.h>
#include <nd_dialog.h>
#include <nd_gui.h>
#include <nd_packet.h>
#include <nd_trace.h>
#include <nd_trace_registry.h>
#include <nd_tp.h>
#include <nd_protocol_inst.h>
#include <nd_raw_protocol.h>
#include <support.h>



static void
packet_ob_insert_post(LND_Packet *packet)
{
  D_ENTER;

  if (! packet->next)
    nd_tp_packet_insert_at_index(packet->part, packet,
				 libnd_packet_get_index(packet));
  else
    {
      nd_gui_list_update(libnd_packet_get_trace(packet));
      nd_gui_num_packets_set();
    }
  
  D_RETURN;
}

static void
packet_ob_delete_pre(LND_Packet *packet)
{
  D_ENTER;
  nd_packet_delete(packet);
  D_RETURN;
}

static void
packet_ob_delete_post(LND_Packet *packet)
{
  D_ENTER;
  if (libnd_packet_get_trace(packet) == nd_trace_registry_get_current())
    nd_gui_num_packets_set();
  D_RETURN;
}

static void
packet_ob_visibility(LND_Packet *packet)
{
  D_ENTER;
  nd_packet_set_filtered_state(packet);
  D_RETURN;
}

static void
packet_ob_fix_gui(LND_Packet *packet)
{
  LND_Trace *trace;

  return_if_no_current_trace(trace);

  /* If this is not our currently-selected packet, just update
   * the packet list widget. Updating the notebook will only
   * slow things down and cause flickering.
   */
  if (!packet || packet != nd_trace_get_current_packet(trace))
    {
      nd_gui_list_update_packet(packet);    
      return;
    }

  nd_packet_set_gui(packet);
}

void            
nd_packet_init(void)
{
  LND_PacketObserver *ob = libnd_packet_observer_new();
  
  ob->packet_insert_post    = packet_ob_insert_post;
  ob->packet_delete_pre     = packet_ob_delete_pre;
  ob->packet_delete_post    = packet_ob_delete_post;
  ob->packet_visibility     = packet_ob_visibility;
  ob->packet_modified       = packet_ob_fix_gui;
  ob->packet_updated        = packet_ob_fix_gui;
  ob->packet_fixed          = packet_ob_fix_gui;

  libnd_packet_add_observer(ob);
}


void
nd_packet_delete(LND_Packet *packet)
{
  LND_Trace *trace;

  D_ENTER;

  if (!packet)
    D_RETURN;

  trace = libnd_packet_get_trace(packet);

  if (packet == nd_trace_get_current_packet(trace))
    nd_trace_set_current_packet(trace, NULL);

  nd_gui_list_remove_row(trace, libnd_packet_get_index(packet));
  
  D_RETURN;
}



void            
nd_packet_set_filtered_state(LND_Packet *packet)
{
  LND_Trace *trace;
  int index;

  D_ENTER;

  if (!packet)
    D_RETURN;

  if (! (trace = libnd_packet_get_trace(packet)))
    D_RETURN;

  /* If this is not one of the in-memory packets, don't update */
  if (!packet->prev &&                               /* no previous packet */
      !packet->next &&                               /* AND no next packet */
      (!packet->part || packet->part->pl != packet)) /* AND it's not the only packet */
    D_RETURN;
    
  index = libnd_packet_get_index(packet);
  nd_gui_list_set_row_filtered(trace, index, libnd_packet_is_filtered(packet));
  D_RETURN;
}


void    
nd_packet_set_gui(const LND_Packet *packet)
{
  GtkWidget      *page;
  GtkNotebook    *notebook;
  ND_Protocol    *proto_gui;
  ND_Trace       *trace_gui;
  LND_Trace      *trace;
  LND_Protocol   *raw_proto;
  LND_ProtoData  *pd;
  LND_ProtoInfo  *pinf;
  int             i;
  GList          *l;
  gboolean        has_sel_proto = FALSE;

  D_ENTER;

  D(("Setting gui to packet %p\n", packet));

  if (!packet)
    {
      LND_Trace *trace;

      return_if_no_current_trace(trace);
      notebook = nd_trace_get_notebook(trace);
      D_ASSERT_PTR(notebook);
      
      /* Hide all tabs */
      page = gtk_notebook_get_nth_page(notebook, 0);
      
      for (i = 0; gtk_notebook_get_nth_page(notebook, i); i++)
	{
	  page = gtk_notebook_get_nth_page(notebook, i);
	  D_ASSERT_PTR(page);
	  gtk_widget_hide(page);
	}

      D_RETURN;
    }

  trace = libnd_packet_get_trace(packet);
  if (! (trace_gui = nd_trace_get(trace)))
    D_RETURN;

  notebook = nd_trace_get_notebook(trace);
  D_ASSERT_PTR(notebook);

  /* Show and hide the protocol tabs for this packet,
     and while doing this, also gray out the protocol menus
     that aren't applicable for this packet:
  */
  page = gtk_notebook_get_nth_page(notebook, 0);

  for (i = 0; gtk_notebook_get_nth_page(notebook, i); i++)
    {
      page = gtk_notebook_get_nth_page(notebook, i);
      D_ASSERT_PTR(page);

      ND_GTK_GET(pinf, page, "pinf");
      proto_gui = nd_proto_get(pinf->inst.proto);
      
      /* Whereas for the tab itself, we want to keep an
       * eye on that nesting level.
       */
      if (libnd_packet_has_proto_nested(packet, pinf->inst.proto, pinf->inst.nesting))
	{
	  gtk_widget_show(page);
	}
      else
	{
	  gtk_widget_hide(page);
	  D(("Packet doesn't have %s at level %i\n", pinf->inst.proto->name, pinf->inst.nesting));
	}
    }

  if (trace_gui->cur_pi_sel)
    {
      has_sel_proto =
	libnd_packet_has_proto_nested(packet,
				      trace_gui->cur_pi_sel->proto,
				      trace_gui->cur_pi_sel->nesting);
    }

  /* If the packet uses the raw protocol data displayer,
   * reset its label for now -- it may get improved upon
   * in the loop below:
   */
  raw_proto = libnd_raw_proto_get();
  if (libnd_packet_has_proto(packet, raw_proto) && trace)
    {
      ND_ProtoInfo *pinf_raw = nd_raw_proto_get_gui(trace);      
      gtk_label_set_text(GTK_LABEL(pinf_raw->proto_label), raw_proto->name);
    }

  /* Now, update each of the packet's protocol header's contents
     in the GUI: */
  for (l = packet->pd, i = 0; l; l = g_list_next(l), i++)
    {
      pd = (LND_ProtoData *) l->data;
      
      if (i == 0 && !trace_gui->cur_pi_sel)
	nd_trace_set_current_proto_selection(trace, &pd->inst);
      
      /* only update the gui for the first protocol, and only if it
	 does not have the selected protocol (which we set below)
	 anyway. Kills a lot of flickering :)
      */
      nd_trace_set_current_proto(trace, &pd->inst, (i == 0 && !has_sel_proto));
      
      pinf = nd_trace_get_proto_info(trace, pd->inst.proto, pd->inst.nesting);

      if (!pinf)
	continue;

      nd_gui_proto_table_block_events(trace, pinf);
      proto_gui = nd_proto_get(pd->inst.proto);
      proto_gui->set_gui(packet, pinf);
      nd_gui_proto_table_unblock_events(trace, pinf);

      /* sort the tabs so that the GUI reflects the sequence in
	 the packet: */
      
      gtk_notebook_reorder_child(notebook, nd_proto_info_get(pinf)->proto_tab, i);
    }

  if (trace_gui->cur_pi_sel)
    nd_trace_set_current_proto(trace, trace_gui->cur_pi_sel, TRUE);

  nd_gui_list_update_packet(packet);    

  D_RETURN;
}