server/socket/loop.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
    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 3.  //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 (int i = 0; i < clients.size (); ++i)
    {
      client *s = clients [i];
      player *pl = s->pl;

      if (pl && pl->ns && !pl->ns->destroyed ())
        {
          client *ns = pl->ns;

          /* 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 (ns->last_weight != -1 && ns->last_weight != WEIGHT (pl->ob))
            {
              esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
              if (ns->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) ns->last_weight, WEIGHT (pl->ob));
            }

          draw_client_map (pl->ob);

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

      s->refcnt_chk ();
    }
}

Revision:	1.37
Committed:	Mon Jan 8 18:18:36 2007 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+5 -3 lines
Log Message:	- move most last_* values into socket, where they belong - this actually saved a lot of space in the text segment, which might mean less complicated pointer accesses, because the data is no where it belongs, mostly.
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4	pippijn	1.36	Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	elmex	1.1	Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team
6			Copyright (C) 1992 Frank Tore Johansen
7
8			This program is free software; you can redistribute it and/or modify
9			it under the terms of the GNU General Public License as published by
10			the Free Software Foundation; either version 2 of the License, or
11			(at your option) any later version.
12
13			This program is distributed in the hope that it will be useful,
14			but WITHOUT ANY WARRANTY; without even the implied warranty of
15			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			GNU General Public License for more details.
17
18			You should have received a copy of the GNU General Public License
19			along with this program; if not, write to the Free Software
20			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22	root	1.7	The author can be reached via e-mail to <crossfire@schmorp.de>
23	elmex	1.1	*/
24
25			/**
26			* \file
27			* Main client/server loops.
28			*
29			* \date 2003-12-02
30			*
31			* loop.c mainly deals with initialization and higher level socket
32	root	1.26	* maintanance (checking for lost connections and if data has arrived.)
33	elmex	1.1	*/
34
35
36			#include <global.h>
37	root	1.10	#include <sproto.h>
38			#include <sockproto.h>
39	elmex	1.1
40	pippijn	1.8	#include <sys/types.h>
41			#include <sys/time.h>
42			#include <sys/socket.h>
43			#include <netinet/in.h>
44			#include <netdb.h>
45	elmex	1.1
46	root	1.16	#include <unistd.h>
47			#include <arpa/inet.h>
48	elmex	1.1
49			#include <loader.h>
50
51	root	1.20	#define MAX_QUEUE_DEPTH 500 //TODO
52	root	1.34	#define MAX_QUEUE_BACKLOG 3. //TODO
53	elmex	1.1
54	root	1.21	void
55			client::reset_state ()
56			{
57			if (!pl)
58			return;
59
60			pl->run_on = 0;
61			pl->fire_on = 0;
62			}
63	elmex	1.1
64	root	1.20	void
65			client::queue_command (packet_type handler, char data, int datalen)
66	root	1.6	{
67	root	1.20	tstamp stamp = now ();
68	elmex	1.1
69	root	1.20	if (cmd_queue.size () >= MAX_QUEUE_DEPTH)
70	root	1.21	{
71			//TODO: just disconnect here?
72			reset_state ();
73			send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED);
74			}
75	root	1.20	else
76	root	1.24	{
77			cmd_queue.push_back (command ());
78			command &cmd = cmd_queue.back ();
79			cmd.stamp = stamp;
80			cmd.handler = handler;
81	root	1.25	cmd.data = salloc<char> (datalen + 1, data);
82	root	1.24	cmd.datalen = datalen;
83			}
84	root	1.20	}
85	elmex	1.1
86	root	1.20	bool
87			client::handle_command ()
88	elmex	1.1	{
89	root	1.26	bool skipping = false;
90	elmex	1.1
91	root	1.26	while (!cmd_queue.empty ()
92	root	1.31	&& !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0))
93	root	1.26	{
94			command &cmd = cmd_queue.front ();
95	root	1.6
96	root	1.26	if (cmd.stamp + MAX_QUEUE_BACKLOG < now ())
97			{
98			if (!skipping)
99			{
100			skipping = true;
101			reset_state ();
102			send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
103			}
104	root	1.11
105	root	1.26	cmd_queue.pop_front ();
106			}
107			else
108			{
109			execute (cmd.handler, cmd.data, cmd.datalen);
110			cmd_queue.pop_front ();
111			return true;
112			}
113	root	1.21	}
114	root	1.6
115	root	1.26	return false;
116	elmex	1.1	}
117
118	root	1.6	void
119			flush_sockets (void)
120	elmex	1.1	{
121	root	1.19	for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
122	root	1.31	(*i)->flush ();
123	elmex	1.1	}
124
125			/**
126	root	1.10	* This checks the sockets for input, does the right thing.
127	elmex	1.1	*
128			* A bit of this code is grabbed out of socket.c
129			* There are 2 lists we need to look through - init_sockets is a list
130			*
131			*/
132	root	1.6	void
133			doeric_server (void)
134	elmex	1.1	{
135			#ifdef CS_LOGSTATS
136	root	1.6	if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME)
137			write_cs_stats ();
138	elmex	1.1	#endif
139
140	root	1.33	//TODO: should not be done here, either
141	root	1.35	for (int i = 0; i < clients.size (); ++i)
142	root	1.6	{
143	root	1.35	client *s = clients [i];
144			player *pl = s->pl;
145	elmex	1.1
146	root	1.35	if (pl && pl->ns && !pl->ns->destroyed ())
147	root	1.6	{
148	root	1.37	client *ns = pl->ns;
149
150	root	1.10	/* Update the players stats once per tick. More efficient than
151			* sending them whenever they change, and probably just as useful
152	root	1.6	*/
153	root	1.10	esrv_update_stats (pl);
154	root	1.20
155	root	1.37	if (ns->last_weight != -1 && ns->last_weight != WEIGHT (pl->ob))
156	root	1.6	{
157	root	1.10	esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
158	root	1.37	if (ns->last_weight != WEIGHT (pl->ob))
159	root	1.10	LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n",
160	root	1.37	(unsigned long) ns->last_weight, WEIGHT (pl->ob));
161	root	1.6	}
162
163	root	1.10	draw_client_map (pl->ob);
164	root	1.20
165	root	1.14	if (s->update_look)
166	root	1.10	esrv_draw_look (pl->ob);
167	root	1.3	}
168	root	1.33
169			s->refcnt_chk ();
170	elmex	1.1	}
171			}
172	root	1.10