server/socket/loop.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    The author can be reached via e-mail to <crossfire@schmorp.de>
*/

/**
 * \file
 * Main client/server loops.
 *
 * \date 2003-12-02
 *
 * loop.c mainly deals with initialization and higher level socket
 * maintenance (checking for lost connections and if data has arrived.)
 * The reading of data is handled in ericserver.c
 */


#include <global.h>
#include <sproto.h>
#include <sockproto.h>

#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#include <unistd.h>
#include <arpa/inet.h>

#include <loader.h>

#define MAX_QUEUE_DEPTH   500 //TODO
#define MAX_QUEUE_BACKLOG 5.  //TODO

void
client::reset_state ()
{
  if (!pl)
    return;

  pl->run_on  = 0;
  pl->fire_on = 0;
}

void
client::queue_command (packet_type *handler, char *data, int datalen)
{
  tstamp stamp = now ();

  if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
    {
      //TODO: just disconnect here?
      reset_state ();
      send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
    }
  else if (!cmd_queue.empty () && cmd_queue.front ().stamp + MAX_QUEUE_BACKLOG < stamp)
    {
      reset_state ();
      send_packet_printf ("drawinfo %d too many commands in queue, ignoring.", NDI_RED);
    }
  else
    {
      cmd_queue.push_back (command ());
      command &cmd = cmd_queue.back ();
      cmd.stamp   = stamp;
      cmd.handler = handler;
      cmd.data    = salloc<char> (datalen + 1, data);
      cmd.datalen = datalen;
    }
}

bool
client::handle_command ()
{
  if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)
    return false;

  if (cmd_queue.empty ())
    return false;

  command &cmd = cmd_queue.front ();

  if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
    {
      reset_state ();
      send_packet_printf ("drawinfo %d ignoring delayed command.", NDI_RED);
    }
  else
    execute (cmd.handler, cmd.data, cmd.datalen);

  cmd_queue.pop_front ();

  return true;
}

void
flush_sockets (void)
{
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    if ((*i)->status != Ns_Dead)
      (*i)->flush ();
}

/**
 * This checks the sockets for input, does the right thing.
 *
 * A bit of this code is grabbed out of socket.c
 * There are 2 lists we need to look through - init_sockets is a list
 * 
 */
void
doeric_server (void)
{
#ifdef CS_LOGSTATS
  if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
    write_cs_stats ();
#endif

  /* Go through the players.  Let the loop set the next pl value,
   * since we may remove some
   */
  //TODO: must be handled cleanly elsewhere
  for (player *pl = first_player; pl; )
    {
      player *npl = pl->next;

      //TODO: must be handled cleanly elsewhere
      if (!pl->socket || pl->socket->status == Ns_Dead)
        {
          save_player (pl->ob, 0);

          if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
            {
              terminate_all_pets (pl->ob);
              pl->ob->remove ();
            }

          leave (pl, 1);
          final_free_player (pl);
        }

      pl = npl;
    }

  for (sockvec::iterator i = clients.begin (); i != clients.end (); )
    {
      client *s = *i;

      if (s->status == Ns_Dead)
        {
          clients.erase (i);
          delete s;
        }
      else
        ++i;
    }

  /* We need to do some of the processing below regardless */

  /* Check for any input on the sockets */
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    {
      client *s = *i;
      player *pl = s->pl;

      s->handle_packet ();
      s->handle_command ();

      //TODO: should not be done here, either
      if (s->status != Ns_Dead && pl)
        {
          /* Update the players stats once per tick.  More efficient than
           * sending them whenever they change, and probably just as useful
           */
          esrv_update_stats (pl);

          if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
            {
              esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
              if (pl->last_weight != WEIGHT (pl->ob))
                LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
                     (unsigned long) pl->last_weight, WEIGHT (pl->ob));
            }

          draw_client_map (pl->ob);

          if (s->update_look)
            esrv_draw_look (pl->ob);
        }
    }
}

Revision:	1.25
Committed:	Sat Dec 16 21:40:26 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.24:	+1 -1 lines
Log Message:	- clean up some code - fix some possible (minor) bugs - use a bitset for anims_sent - fix a memory leak - removed dead code
#	Content
1	/*
2	CrossFire, A Multiplayer game for X-windows
3
4	Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
5	Copyright (C) 1992 Frank Tore Johansen
6
7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.
11
12	This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.
16
17	You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	The author can be reached via e-mail to <crossfire@schmorp.de>
22	*/
23
24	/**
25	* \file
26	* Main client/server loops.
27	*
28	* \date 2003-12-02
29	*
30	* loop.c mainly deals with initialization and higher level socket
31	* maintenance (checking for lost connections and if data has arrived.)
32	* The reading of data is handled in ericserver.c
33	*/
34
35
36	#include <global.h>
37	#include <sproto.h>
38	#include <sockproto.h>
39
40	#include <sys/types.h>
41	#include <sys/time.h>
42	#include <sys/socket.h>
43	#include <netinet/in.h>
44	#include <netdb.h>
45
46	#include <unistd.h>
47	#include <arpa/inet.h>
48
49	#include <loader.h>
50
51	#define MAX_QUEUE_DEPTH 500 //TODO
52	#define MAX_QUEUE_BACKLOG 5. //TODO
53
54	void
55	client::reset_state ()
56	{
57	if (!pl)
58	return;
59
60	pl->run_on = 0;
61	pl->fire_on = 0;
62	}
63
64	void
65	client::queue_command (packet_type handler, char data, int datalen)
66	{
67	tstamp stamp = now ();
68
69	if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
70	{
71	//TODO: just disconnect here?
72	reset_state ();
73	send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
74	}
75	else if (!cmd_queue.empty () && cmd_queue.front ().stamp + MAX_QUEUE_BACKLOG < stamp)
76	{
77	reset_state ();
78	send_packet_printf ("drawinfo %d too many commands in queue, ignoring.", NDI_RED);
79	}
80	else
81	{
82	cmd_queue.push_back (command ());
83	command &cmd = cmd_queue.back ();
84	cmd.stamp = stamp;
85	cmd.handler = handler;
86	cmd.data = salloc<char> (datalen + 1, data);
87	cmd.datalen = datalen;
88	}
89	}
90
91	bool
92	client::handle_command ()
93	{
94	if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)
95	return false;
96
97	if (cmd_queue.empty ())
98	return false;
99
100	command &cmd = cmd_queue.front ();
101
102	if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
103	{
104	reset_state ();
105	send_packet_printf ("drawinfo %d ignoring delayed command.", NDI_RED);
106	}
107	else
108	execute (cmd.handler, cmd.data, cmd.datalen);
109
110	cmd_queue.pop_front ();
111
112	return true;
113	}
114
115	void
116	flush_sockets (void)
117	{
118	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
119	if ((*i)->status != Ns_Dead)
120	(*i)->flush ();
121	}
122
123	/**
124	* This checks the sockets for input, does the right thing.
125	*
126	* A bit of this code is grabbed out of socket.c
127	* There are 2 lists we need to look through - init_sockets is a list
128	*
129	*/
130	void
131	doeric_server (void)
132	{
133	#ifdef CS_LOGSTATS
134	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
135	write_cs_stats ();
136	#endif
137
138	/* Go through the players. Let the loop set the next pl value,
139	* since we may remove some
140	*/
141	//TODO: must be handled cleanly elsewhere
142	for (player *pl = first_player; pl; )
143	{
144	player *npl = pl->next;
145
146	//TODO: must be handled cleanly elsewhere
147	if (!pl->socket \|\| pl->socket->status == Ns_Dead)
148	{
149	save_player (pl->ob, 0);
150
151	if (!QUERY_FLAG (pl->ob, FLAG_REMOVED))
152	{
153	terminate_all_pets (pl->ob);
154	pl->ob->remove ();
155	}
156
157	leave (pl, 1);
158	final_free_player (pl);
159	}
160
161	pl = npl;
162	}
163
164	for (sockvec::iterator i = clients.begin (); i != clients.end (); )
165	{
166	client s = i;
167
168	if (s->status == Ns_Dead)
169	{
170	clients.erase (i);
171	delete s;
172	}
173	else
174	++i;
175	}
176
177	/* We need to do some of the processing below regardless */
178
179	/* Check for any input on the sockets */
180	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
181	{
182	client s = i;
183	player *pl = s->pl;
184
185	s->handle_packet ();
186	s->handle_command ();
187
188	//TODO: should not be done here, either
189	if (s->status != Ns_Dead && pl)
190	{
191	/* Update the players stats once per tick. More efficient than
192	* sending them whenever they change, and probably just as useful
193	*/
194	esrv_update_stats (pl);
195
196	if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
197	{
198	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
199	if (pl->last_weight != WEIGHT (pl->ob))
200	LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
201	(unsigned long) pl->last_weight, WEIGHT (pl->ob));
202	}
203
204	draw_client_map (pl->ob);
205
206	if (s->update_look)
207	esrv_draw_look (pl->ob);
208	}
209	}
210	}
211