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/* |
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* This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
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* |
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* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
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* Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
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* Copyright (©) 1992,2007 Frank Tore Johansen |
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* |
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* Crossfire TRT is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* The authors can be reached via e-mail to <crossfire@schmorp.de> |
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*/ |
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|
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/** |
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* \file |
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* Main client/server loops. |
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* |
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* \date 2003-12-02 |
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* |
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* loop.c mainly deals with initialization and higher level socket |
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* maintanance (checking for lost connections and if data has arrived.) |
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*/ |
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|
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#include <global.h> |
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#include <sproto.h> |
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#include <sockproto.h> |
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|
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netdb.h> |
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|
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#include <unistd.h> |
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#include <arpa/inet.h> |
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|
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#include <loader.h> |
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|
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#define BG_SCRUB_RATE 4 // how often to send a face in the background |
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|
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#define MAX_QUEUE_DEPTH 500 |
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#define MAX_QUEUE_BACKLOG 3. |
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|
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void |
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client::reset_state () |
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{ |
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if (!pl) |
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return; |
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|
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pl->run_on = 0; |
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pl->fire_on = 0; |
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} |
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|
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void |
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client::queue_command (packet_type *handler, char *data, int datalen) |
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{ |
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tstamp stamp = NOW; |
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|
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if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
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{ |
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//TODO: just disconnect here? |
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reset_state (); |
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send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
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} |
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else |
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{ |
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cmd_queue.push_back (command ()); |
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command &cmd = cmd_queue.back (); |
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cmd.stamp = stamp; |
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cmd.handler = handler; |
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cmd.data = salloc<char> (datalen + 1, data); |
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cmd.datalen = datalen; |
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} |
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} |
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|
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bool |
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client::handle_command () |
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{ |
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if (!cmd_queue.empty () |
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&& state == ST_PLAYING |
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&& pl->ob->speed_left > 0.f) |
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{ |
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command &cmd = cmd_queue.front (); |
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|
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if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
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{ |
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reset_state (); |
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send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
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} |
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else |
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execute (cmd.handler, cmd.data, cmd.datalen); |
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|
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cmd_queue.pop_front (); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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void |
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flush_sockets (void) |
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{ |
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for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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(*i)->flush (); |
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} |
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|
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/** |
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* This checks the sockets for input, does the right thing. |
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* |
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* A bit of this code is grabbed out of socket.c |
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* There are 2 lists we need to look through - init_sockets is a list |
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* |
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*/ |
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void |
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doeric_server (void) |
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{ |
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//TODO: should not be done here, either |
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for (unsigned i = 0; i < clients.size (); ++i) |
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{ |
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client *ns = clients [i]; |
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|
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ns->tick (); |
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ns->refcnt_chk (); |
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} |
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} |
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|
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void |
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client::tick () |
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{ |
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if (!pl || destroyed ()) |
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return; |
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|
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/* Update the players stats once per tick. More efficient than |
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* sending them whenever they change, and probably just as useful |
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*/ |
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esrv_update_stats (pl); |
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|
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if (last_weight != -1 && last_weight != WEIGHT (pl->ob)) |
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{ |
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esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
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if (last_weight != WEIGHT (pl->ob)) |
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LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
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(unsigned long) last_weight, WEIGHT (pl->ob)); |
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} |
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|
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draw_client_map (pl); |
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|
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if (update_look) |
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esrv_draw_look (pl); |
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|
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bool overload = false; |
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|
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#if HAVE_TCP_INFO |
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// do bandwidth checking |
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if (tcpi.tcpi_unacked + 1 > max (4, tcpi.tcpi_snd_cwnd)) |
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{ |
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overload = true; |
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if (next_rate_adjust <= NOW) |
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{ |
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next_rate_adjust = NOW + 2; |
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max_rate = max (max_rate >> 1, int (5000 * TICK)); |
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LOG (llevDebug, "tcp %s overloaded (%d + 1 > 4 | %d), rate now %d\n", |
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host, (int)tcpi.tcpi_unacked, (int)tcpi.tcpi_snd_cwnd, int (max_rate / TICK));//D |
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send_packet_printf ("drawinfo %d Due to possible network congestion, your output-rate has been reduced to %dbps.", |
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NDI_RED, int (max_rate / TICK)); |
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} |
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} |
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#endif |
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|
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if (!overload) |
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{ |
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if (ixface.empty ()) |
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{ |
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// regularly send a new face when queue is empty |
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if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
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while (scrub_idx < faces.size () - 1) |
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{ |
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++scrub_idx; |
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|
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if (!faces_sent [scrub_idx]) |
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if (faceinfo *f = face_info (scrub_idx)) |
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if (f->type == FT_FACE) // only scrub faces for now |
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{ |
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send_face (scrub_idx, -120); |
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flush_fx (); |
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|
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bg_scrub = 1; // send up to one face per tick, unless an image was requested |
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break; |
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} |
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} |
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|
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rate_avail = max_rate - outputbuffer_len (); |
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} |
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else |
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{ |
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int ol = outputbuffer_len (); |
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|
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rate_avail = min (max_rate, rate_avail + max_rate); |
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rate_avail -= ol; |
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|
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int avail = rate_avail; |
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|
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// if we can split images, transfer up to mss-sized packets if possible |
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// but never 768 bytes more. |
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if (fxix) avail += min (768, mss - (ol % mss)); |
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|
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bg_scrub = BG_SCRUB_RATE; |
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|
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while (avail > 0) |
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{ |
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ixsend &ix = ixface.back (); |
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|
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if (facedata *d = face_data (ix.idx, faceset)) |
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{ |
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if (fxix) |
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{ |
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// only transfer something if the amount of data transferred |
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// has a healthy relation to the header overhead |
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if (avail <= 40) |
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break; |
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|
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// 9 bytes is enough for fx_FFFOOO |
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int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs); |
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|
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if (chunk <= 0) |
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break; |
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|
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ix.ofs -= chunk; |
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|
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//fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
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|
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packet sl ("ix"); |
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|
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sl << ber32 (ix.idx) |
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<< ber32 (ix.ofs) |
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<< data (d->data.data () + ix.ofs, chunk); |
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|
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send_packet (sl); |
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} |
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else |
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{ |
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send_image (ix.idx); |
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ix.ofs = 0; |
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} |
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} |
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else |
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ix.ofs = 0; |
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|
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int consumed = outputbuffer_len () - ol; |
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|
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avail -= consumed; |
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rate_avail -= consumed; |
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|
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ol = outputbuffer_len (); |
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|
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if (!ix.ofs) |
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{ |
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ixface.pop_back (); |
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|
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if (ixface.empty ()) |
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break; |
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} |
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} |
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} |
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} |
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} |
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|
