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
 * maintanance (checking for lost connections and if data has arrived.)
 */


#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
    {
      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 ()
{
  bool skipping = false;

  while (!cmd_queue.empty ()
         && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0))
    {
      command &cmd = cmd_queue.front ();

      if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
        {
          if (!skipping)
            {
              skipping = true;
              reset_state ();
              send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
            }

          cmd_queue.pop_front ();
        }
      else
        {
          execute (cmd.handler, cmd.data, cmd.datalen);
          cmd_queue.pop_front ();
          return true;
        }
    }

  return false;
}

void
flush_sockets (void)
{
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    (*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

  //TODO: should not be done here, either
  for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
    {
      client *s = *i;

      if (player *pl = s->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);
        }

      s->refcnt_chk ();
    }
}

Revision:	1.33
Committed:	Mon Dec 25 11:25:50 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.32:	+4 -19 lines
Log Message:	- small, but subtle, rewrite of object management - perl will now keep attachable objects alive - objects are now refcounted - refcouts need to be tested explicitly (refcnt_chk) - explicit destroy is required current - explicit destroy asks "nicely" for the object to self destruct, if possible - refcounts will be used during mortal killing - minor bugfixes, optimisations etc. - some former hacks removed.
#	User	Rev	Content
1	elmex	1.1	/*
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	root	1.7	The author can be reached via e-mail to <crossfire@schmorp.de>
22	elmex	1.1	*/
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	root	1.26	* maintanance (checking for lost connections and if data has arrived.)
32	elmex	1.1	*/
33
34
35			#include <global.h>
36	root	1.10	#include <sproto.h>
37			#include <sockproto.h>
38	elmex	1.1
39	pippijn	1.8	#include <sys/types.h>
40			#include <sys/time.h>
41			#include <sys/socket.h>
42			#include <netinet/in.h>
43			#include <netdb.h>
44	elmex	1.1
45	root	1.16	#include <unistd.h>
46			#include <arpa/inet.h>
47	elmex	1.1
48			#include <loader.h>
49
50	root	1.20	#define MAX_QUEUE_DEPTH 500 //TODO
51	root	1.23	#define MAX_QUEUE_BACKLOG 5. //TODO
52	elmex	1.1
53	root	1.21	void
54			client::reset_state ()
55			{
56			if (!pl)
57			return;
58
59			pl->run_on = 0;
60			pl->fire_on = 0;
61			}
62	elmex	1.1
63	root	1.20	void
64			client::queue_command (packet_type handler, char data, int datalen)
65	root	1.6	{
66	root	1.20	tstamp stamp = now ();
67	elmex	1.1
68	root	1.20	if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
69	root	1.21	{
70			//TODO: just disconnect here?
71			reset_state ();
72			send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
73			}
74	root	1.20	else
75	root	1.24	{
76			cmd_queue.push_back (command ());
77			command &cmd = cmd_queue.back ();
78			cmd.stamp = stamp;
79			cmd.handler = handler;
80	root	1.25	cmd.data = salloc<char> (datalen + 1, data);
81	root	1.24	cmd.datalen = datalen;
82			}
83	root	1.20	}
84	elmex	1.1
85	root	1.20	bool
86			client::handle_command ()
87	elmex	1.1	{
88	root	1.26	bool skipping = false;
89	elmex	1.1
90	root	1.26	while (!cmd_queue.empty ()
91	root	1.31	&& !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0))
92	root	1.26	{
93			command &cmd = cmd_queue.front ();
94	root	1.6
95	root	1.26	if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
96			{
97			if (!skipping)
98			{
99			skipping = true;
100			reset_state ();
101			send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
102			}
103	root	1.11
104	root	1.26	cmd_queue.pop_front ();
105			}
106			else
107			{
108			execute (cmd.handler, cmd.data, cmd.datalen);
109			cmd_queue.pop_front ();
110			return true;
111			}
112	root	1.21	}
113	root	1.6
114	root	1.26	return false;
115	elmex	1.1	}
116
117	root	1.6	void
118			flush_sockets (void)
119	elmex	1.1	{
120	root	1.19	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
121	root	1.31	(*i)->flush ();
122	elmex	1.1	}
123
124			/**
125	root	1.10	* This checks the sockets for input, does the right thing.
126	elmex	1.1	*
127			* A bit of this code is grabbed out of socket.c
128			* There are 2 lists we need to look through - init_sockets is a list
129			*
130			*/
131	root	1.6	void
132			doeric_server (void)
133	elmex	1.1	{
134			#ifdef CS_LOGSTATS
135	root	1.6	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
136			write_cs_stats ();
137	elmex	1.1	#endif
138
139	root	1.33	//TODO: should not be done here, either
140	root	1.19	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
141	root	1.6	{
142	root	1.19	client s = i;
143	elmex	1.1
144	root	1.33	if (player *pl = s->pl)
145	root	1.6	{
146	root	1.10	/* Update the players stats once per tick. More efficient than
147			* sending them whenever they change, and probably just as useful
148	root	1.6	*/
149	root	1.10	esrv_update_stats (pl);
150	root	1.20
151	root	1.10	if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob))
152	root	1.6	{
153	root	1.10	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
154			if (pl->last_weight != WEIGHT (pl->ob))
155			LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
156			(unsigned long) pl->last_weight, WEIGHT (pl->ob));
157	root	1.6	}
158
159	root	1.10	draw_client_map (pl->ob);
160	root	1.20
161	root	1.14	if (s->update_look)
162	root	1.10	esrv_draw_look (pl->ob);
163	root	1.3	}
164	root	1.33
165			s->refcnt_chk ();
166	elmex	1.1	}
167			}
168	root	1.10