/*
* This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
*
* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
* Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team
* Copyright (©) 1992,2007 Frank Tore Johansen
*
* Crossfire TRT 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 3 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, see .
*
* The authors can be reached via e-mail to
*/
/**
* \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
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define BG_SCRUB_RATE 4 // how often to send a face in the background
#define MAX_QUEUE_DEPTH 500
#define MAX_QUEUE_BACKLOG 3.
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 (datalen + 1, data);
cmd.datalen = datalen;
}
}
bool
client::handle_command ()
{
if (!cmd_queue.empty ()
&& state == ST_PLAYING
&& pl->ob->speed_left > 0.f)
{
command &cmd = cmd_queue.front ();
if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW)
{
reset_state ();
send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED);
}
else
execute (cmd.handler, cmd.data, cmd.datalen);
cmd_queue.pop_front ();
return true;
}
else
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)
{
//TODO: should not be done here, either
for (unsigned i = 0; i < clients.size (); ++i)
{
client *ns = clients [i];
ns->tick ();
ns->refcnt_chk ();
}
}
void
client::tick ()
{
if (!pl || destroyed ())
return;
/* 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 (last_weight != -1 && last_weight != WEIGHT (pl->ob))
{
esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob);
if (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) last_weight, WEIGHT (pl->ob));
}
draw_client_map (pl);
if (update_look)
esrv_draw_look (pl);
if (ixface.empty ())
{
// regularly send a new face when queue is empty
if (bg_scrub && !--bg_scrub && enable_bg_scrub)
while (scrub_idx < faces.size () - 1)
{
++scrub_idx;
if (!faces_sent [scrub_idx])
{
send_face (scrub_idx);
flush_fx ();
bg_scrub = 1; // send up to one face per tick, unless an image was requested
break;
}
}
rate_avail = max_rate - outputbuffer_len ();
}
else
{
int ol = outputbuffer_len ();
rate_avail = min (max_rate, rate_avail + max_rate);
rate_avail -= ol;
int avail = rate_avail;
// if we can split images, transfer up to mss-sized packets if possible
// but never 768 bytes more.
if (fxix) avail += min (768, mss - (ol % mss));
bg_scrub = BG_SCRUB_RATE;
while (avail > 0)
{
ixsend &ix = ixface.back ();
if (facedata *d = face_data (ix.idx, faceset))
{
if (fxix)
{
// 9 bytes is enough for fx_FFFOOO, 240 leaves some room for image data
int chunk = min (min (avail - 240, MAXSOCKBUF - 9), ix.ofs);
if (chunk <= 0)
break;
ix.ofs -= chunk;
packet sl ("ix");
sl << ber32 (ix.idx)
<< ber32 (ix.ofs)
<< data (d->data.data () + ix.ofs, chunk);
send_packet (sl);
}
else
{
send_image (ix.idx);
ix.ofs = 0;
}
}
else
ix.ofs = 0;
int consumed = outputbuffer_len () - ol;
avail -= consumed;
rate_avail -= consumed;
ol = outputbuffer_len ();
if (!ix.ofs)
{
ixface.pop_back ();
if (ixface.empty ())
break;
}
}
}
}