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Comparing deliantra/server/socket/loop.C (file contents):
Revision 1.64 by root, Sat Jul 28 00:45:05 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 Roguelike Realtime MORPG. 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 8 * Deliantra is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by 9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) 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, 13 * This program is distributed in the hope that it will be useful,
… …
16 * GNU General Public License 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 18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>. 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * 20 *
21 * 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>
22 */ 22 */
23 23
24/** 24/**
25 * \file 25 * \file
26 * Main client/server loops. 26 * Main client/server loops.
… …
46 46
47#include <loader.h> 47#include <loader.h>
48 48
49#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
50 50
51#define MAX_QUEUE_DEPTH 500 51#define MAX_QUEUE_DEPTH 50
52#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.
53 56
54void 57void
55client::reset_state () 58client::reset_state ()
56{ 59{
57 if (!pl) 60 if (!pl)
… …
106 else 109 else
107 return false; 110 return false;
108} 111}
109 112
110void 113void
111flush_sockets (void)
112{
113 for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i)
114 (*i)->flush ();
115}
116
117/**
118 * This checks the sockets for input, does the right thing.
119 *
120 * A bit of this code is grabbed out of socket.c
121 * There are 2 lists we need to look through - init_sockets is a list
122 *
123 */
124void
125doeric_server (void)
126{
127 //TODO: should not be done here, either
128 for (unsigned i = 0; i < clients.size (); ++i)
129 {
130 client *ns = clients [i];
131
132 ns->tick ();
133 ns->refcnt_chk ();
134 }
135}
136
137void
138client::tick () 114client::tick ()
139{ 115{
140 if (!pl || destroyed ()) 116 if (!pl || destroyed ())
141 return; 117 return;
142 118
… …
156 draw_client_map (pl); 132 draw_client_map (pl);
157 133
158 if (update_look) 134 if (update_look)
159 esrv_draw_look (pl); 135 esrv_draw_look (pl);
160 136
161 bool overload = false; 137 mapinfo_queue_run ();
162 138
163#if HAVE_TCP_INFO 139#if HAVE_TCP_INFO
164 // do bandwidth checking 140 // check time of last ack, and, if too old, kill connection
165 if (tcpi.tcpi_unacked + 1 > max (4, tcpi.tcpi_snd_cwnd)) 141 socklen_t len = sizeof (tcpi);
142
143 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
166 { 144 {
167 overload = true; 145 if (tcpi.tcpi_snd_mss)
168 if (next_rate_adjust <= NOW) 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))
169 { 164 {
170 next_rate_adjust = NOW + 2; 165 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
171 max_rate = max (max_rate >> 1, int (5000 * TICK)); 166 write_outputbuffer ();
172 LOG (llevDebug, "tcp %s overloaded (%d + 1 > 4 | %d), rate now %d\n", 167
173 host, (int)tcpi.tcpi_unacked, (int)tcpi.tcpi_snd_cwnd, int (max_rate / TICK));//D 168 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
174 send_packet_printf ("drawinfo %d Due to possible network congestion, your output-rate has been reduced to %dbps.", 169 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
175 NDI_RED, int (max_rate / TICK)); 170 destroy ();
176 } 171 }
177 } 172 }
178#endif 173#endif
179 174
180 if (!overload) 175 rate_avail = min (max_rate + mss, rate_avail + max_rate);
181 { 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;
186
182 if (ixface.empty ()) 187 if (ixface.empty ())
188 {
189 // regularly send a new face when queue is empty
190 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
191 while (scrub_idx < faces.size () - 1)
192 {
193 ++scrub_idx;
194
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
198 {
199 send_face (scrub_idx, -120);
200 flush_fx ();
201
202 bg_scrub = 1; // send up to one fx per tick, unless an image was requested
203 break;
204 }
205 }
206 }
207 else
208 {
209 bg_scrub = BG_SCRUB_RATE;
210
211 for (;;)
183 { 212 {
184 // regularly send a new face when queue is empty
185 if (bg_scrub && !--bg_scrub && enable_bg_scrub)
186 while (scrub_idx < faces.size () - 1)
187 {
188 ++scrub_idx;
189
190 if (!faces_sent [scrub_idx])
191 if (faceinfo *f = face_info (scrub_idx))
192 if (f->type == FT_FACE) // only scrub faces for now
193 {
194 send_face (scrub_idx, -120);
195 flush_fx ();
196
197 bg_scrub = 1; // send up to one face per tick, unless an image was requested
198 break;
199 }
200 }
201
202 rate_avail = max_rate - outputbuffer_len (); 213 int avail = max_send - outputbuffer_len ();
203 }
204 else
205 {
206 int ol = outputbuffer_len ();
207 214
208 rate_avail = min (max_rate, rate_avail + max_rate);
209 rate_avail -= ol;
210
211 int avail = rate_avail;
212
213 // if we can split images, transfer up to mss-sized packets if possible
214 // but never 768 bytes more.
215 if (fxix) avail += min (768, mss - (ol % mss));
216
217 bg_scrub = BG_SCRUB_RATE;
218
219 while (avail > 0) 215 if (avail <= 0)
216 break;
217
218 ixsend &ix = ixface.back ();
219
220 if (facedata *d = face_data (ix.idx, faceset))
220 { 221 {
221 ixsend &ix = ixface.back (); 222 if (fxix)
222
223 if (facedata *d = face_data (ix.idx, faceset))
224 { 223 {
225 if (fxix) 224 // estimate the packet header overhead "ix " + idx + (new)ofs
226 { 225 int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs);
226 int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen;
227
227 // only transfer something if the amount of data transferred 228 // only transfer something if the amount of data transferred
228 // has a healthy relation to the header overhead 229 // has a healthy relation to the header overhead
229 if (avail <= 40) 230 if (chunk < 64)
230 break; 231 break;
231 232
232 // 9 bytes is enough for fx_FFFOOO 233 chunk = min (chunk, (int)ix.ofs);
233 int chunk = min (min (avail, MAXSOCKBUF - 9), (int)ix.ofs);
234 234
235 if (chunk <= 0)
236 break;
237
238 ix.ofs -= chunk; 235 ix.ofs -= chunk;
239 236
240 //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D 237 //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D
241 238
242 packet sl ("ix"); 239 packet sl ("ix");
243 240
244 sl << ber32 (ix.idx) 241 sl << ber32 (ix.idx)
245 << ber32 (ix.ofs) 242 << ber32 (ix.ofs)
246 << data (d->data.data () + ix.ofs, chunk); 243 << data (d->data.data () + ix.ofs, chunk);
247 244
248 send_packet (sl); 245 send_packet (sl);
249 }
250 else
251 {
252 send_image (ix.idx);
253 ix.ofs = 0;
254 }
255 } 246 }
256 else 247 else
257 ix.ofs = 0;
258
259 int consumed = outputbuffer_len () - ol;
260
261 avail -= consumed;
262 rate_avail -= consumed;
263
264 ol = outputbuffer_len ();
265
266 if (!ix.ofs)
267 { 248 {
268 ixface.pop_back (); 249 send_image (ix.idx);
269 250 ix.ofs = 0;
270 if (ixface.empty ())
271 break;
272 } 251 }
273 } 252 }
253 else
254 ix.ofs = 0;
255
256 if (!ix.ofs)
257 {
258 ixface.pop_back ();
259
260 if (ixface.empty ())
261 break;
262 }
274 } 263 }
275 } 264 }
276}
277 265
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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