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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.54 by root, Sun Jul 1 04:08:14 2007 UTC vs.
Revision 1.70 by root, Thu Nov 8 19:43:30 2007 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team 4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team 5 * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 7 *
8 * Crossfire TRT is free software; you can redistribute it and/or modify it 8 * Deliantra is free software: you can redistribute it and/or modify
9 * under the terms of the GNU General Public License as published by the Free 9 * it under the terms of the GNU General Public License as published by
10 * Software Foundation; either version 2 of the License, or (at your option) 10 * the Free Software Foundation, either version 3 of the License, or
11 * any later version. 11 * (at your option) any later version.
12 * 12 *
13 * This program is distributed in the hope that it will be useful, but 13 * This program is distributed in the hope that it will be useful,
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * for more details. 16 * GNU General Public License for more details.
17 * 17 *
18 * You should have received a copy of the GNU General Public License along 18 * You should have received a copy of the GNU General Public License
19 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * 20 *
22 * The authors can be reached via e-mail to <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <support@deliantra.net>
23 */ 22 */
24 23
25/** 24/**
26 * \file 25 * \file
27 * Main client/server loops. 26 * Main client/server loops.
… …
47 46
48#include <loader.h> 47#include <loader.h>
49 48
50#define BG_SCRUB_RATE 4 // how often to send a face in the background 49#define BG_SCRUB_RATE 4 // how often to send a face in the background
51 50
52#define MAX_QUEUE_DEPTH 500 51#define MAX_QUEUE_DEPTH 50
53#define MAX_QUEUE_BACKLOG 3. 52#define MAX_QUEUE_BACKLOG 3.
53
54// disconnect a socket after this many seconds without an ack
55#define SOCKET_TIMEOUT 8.
54 56
55void 57void
56client::reset_state () 58client::reset_state ()
57{ 59{
58 if (!pl) 60 if (!pl)
… …
107 else 109 else
108 return false; 110 return false;
109} 111}
110 112
111void 113void
112flush_sockets (void)
113{
114 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
115 (*i)->flush ();
116}
117
118/**
119 * This checks the sockets for input, does the right thing.
120 *
121 * A bit of this code is grabbed out of socket.c
122 * There are 2 lists we need to look through - init_sockets is a list
123 *
124 */
125void
126doeric_server (void)
127{
128 //TODO: should not be done here, either
129 for (unsigned i = 0; i < clients.size (); ++i)
130 {
131 client *ns = clients [i];
132
133 ns->tick ();
134 ns->refcnt_chk ();
135 }
136}
137
138void
139client::tick () 114client::tick ()
140{ 115{
141 if (!pl || destroyed ()) 116 if (!pl || destroyed ())
142 return; 117 return;
143 118
… …
156 131
157 draw_client_map (pl); 132 draw_client_map (pl);
158 133
159 if (update_look) 134 if (update_look)
160 esrv_draw_look (pl); 135 esrv_draw_look (pl);
136
137 mapinfo_queue_run ();
138
139#if HAVE_TCP_INFO
140 // check time of last ack, and, if too old, kill connection
141 socklen_t len = sizeof (tcpi);
142
143 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
144 {
145 if (tcpi.tcpi_snd_mss)
146 mss = tcpi.tcpi_snd_mss;
147
148#if 0
149 fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n",
150 tcpi.tcpi_unacked,
151 tcpi.tcpi_sacked,
152 tcpi.tcpi_lost,
153 tcpi.tcpi_retrans,
154 tcpi.tcpi_fackets,
155 tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss,
156
157 tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked));
158#endif
159
160 // fast-time-out a player by checking for missign acks
161 // do this only when player is active
162 if (pl && pl->active
163 && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
164 {
165 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
166 write_outputbuffer ();
167
168 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
169 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
170 destroy ();
171 }
172 }
173#endif
174
175 rate_avail = min (max_rate + mss, rate_avail + max_rate);
176
177 int max_send = rate_avail;
178
179#if HAVE_TCP_INFO
180 // further restrict the available bandwidth by the excess bandwidth available
181 max_send = min (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss);
182#endif
183
184 // if we can split images, round to next-lowest mss
185 if (fxix) max_send -= max_send % mss;
161 186
162 if (ixface.empty ()) 187 if (ixface.empty ())
163 { 188 {
164 // regularly send a new face when queue is empty 189 // regularly send a new face when queue is empty
165 if (bg_scrub && !--bg_scrub && enable_bg_scrub) 190 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
166 while (scrub_idx < faces.size () - 1) 191 while (scrub_idx < faces.size () - 1)
167 { 192 {
168 ++scrub_idx; 193 ++scrub_idx;
169 194
170 if (!faces_sent [scrub_idx]) 195 if (!faces_sent [scrub_idx])
196 if (faceinfo *f = face_info (scrub_idx))
197 if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now
171 { 198 {
172 send_face (scrub_idx); 199 send_face (scrub_idx, -120);
173 flush_fx (); 200 flush_fx ();
174 201
175 bg_scrub = 1; // send up to one face per tick, unless an image was requested 202 bg_scrub = 1; // send up to one fx per tick, unless an image was requested
176 break; 203 break;
177 } 204 }
178 } 205 }
179
180 rate_avail = max_rate - outputbuffer_len ();
181 } 206 }
182 else 207 else
183 { 208 {
184 int ol = outputbuffer_len ();
185
186 rate_avail = min (max_rate, rate_avail + max_rate);
187 rate_avail -= ol;
188
189 int avail = rate_avail;
190
191 // if we can split images, transfer up to mss-sized packets if possible
192 // but never 768 bytes more.
193 if (fxix) avail += min (768, mss - (ol % mss));
194
195 bg_scrub = BG_SCRUB_RATE; 209 bg_scrub = BG_SCRUB_RATE;
196 210
197 while (avail > 0) 211 for (;;)
198 { 212 {
213 int avail = max_send - outputbuffer_len ();
214
215 if (avail <= 0)
216 break;
217
199 ixsend &ix = ixface.back (); 218 ixsend &ix = ixface.back ();
200 219
201 if (facedata *d = face_data (ix.idx, faceset)) 220 if (facedata *d = face_data (ix.idx, faceset))
202 { 221 {
203 if (fxix) 222 if (fxix)
204 { 223 {
205 // 9 bytes is enough for fx_FFFOOO, 40 leaves some room for image data 224 // estimate the packet header overhead "ix " + idx + (new)ofs
225 int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs);
206 int chunk = min (min (avail - 40, MAXSOCKBUF - 9), ix.ofs); 226 int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen;
207 227
228 // only transfer something if the amount of data transferred
229 // has a healthy relation to the header overhead
208 if (chunk <= 0) 230 if (chunk < 64)
209 break; 231 break;
210 232
233 chunk = min (chunk, (int)ix.ofs);
234
211 ix.ofs -= chunk; 235 ix.ofs -= chunk;
236
237 //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
212 238
213 packet sl ("ix"); 239 packet sl ("ix");
214 240
215 sl << ber32 (ix.idx) 241 sl << ber32 (ix.idx)
216 << ber32 (ix.ofs) 242 << ber32 (ix.ofs)
… …
225 } 251 }
226 } 252 }
227 else 253 else
228 ix.ofs = 0; 254 ix.ofs = 0;
229 255
230 int consumed = ol - outputbuffer_len ();
231
232 avail -= consumed;
233 rate_avail -= consumed;
234
235 ol = outputbuffer_len ();
236
237 if (!ix.ofs) 256 if (!ix.ofs)
238 { 257 {
239 ixface.pop_back (); 258 ixface.pop_back ();
259
240 if (ixface.empty ()) 260 if (ixface.empty ())
241 break; 261 break;
242 } 262 }
243 } 263 }
244 } 264 }
245}
246 265
266 rate_avail -= outputbuffer_len ();
267}
268
269void
270client::flush_sockets (void)
271{
272 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
273 (*i)->flush ();
274}
275
276void
277client::clock (void)
278{
279 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
280 (*i)->tick ();
281
282 // give them all the same chances
283 flush_sockets ();
284
285 //TODO: should not be done here, either
286 for (unsigned i = 0; i < clients.size (); ++i)
287 clients[i]->refcnt_chk ();
288}
289

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