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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.45 by root, Sun Jun 10 02:51:46 2007 UTC vs.
Revision 1.69 by root, Sun Dec 28 06:59:27 2008 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 (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 1992,2007 Frank Tore Johansen 5 * Copyright (©) 1992,2007 Frank Tore Johansen
6 * 6 *
7 * Crossfire TRT is free software; you can redistribute it and/or modify it 7 * Deliantra is free software: you can redistribute it and/or modify
8 * under the terms of the GNU General Public License as published by the Free 8 * it under the terms of the GNU General Public License as published by
9 * Software Foundation; either version 2 of the License, or (at your option) 9 * the Free Software Foundation, either version 3 of the License, or
10 * any later version. 10 * (at your option) any later version.
11 * 11 *
12 * This program is distributed in the hope that it will be useful, but 12 * This program is distributed in the hope that it will be useful,
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * for more details. 15 * GNU General Public License for more details.
16 * 16 *
17 * You should have received a copy of the GNU General Public License along 17 * You should have received a copy of the GNU General Public License
18 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * 19 *
21 * The authors can be reached via e-mail to <crossfire@schmorp.de> 20 * The authors can be reached via e-mail to <support@deliantra.net>
22 */ 21 */
23 22
24using namespace std; 23using namespace std;
25 24
26#include <global.h> 25#include <global.h>
… …
32# include <sys/socket.h> 31# include <sys/socket.h>
33# include <netinet/in.h> 32# include <netinet/in.h>
34# include <netinet/tcp.h> 33# include <netinet/tcp.h>
35#endif 34#endif
36 35
37// disconnect a socket after this many seconds without an ack
38#define SOCKET_TIMEOUT 8.
39
40// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
41// forcing an ack regularly. 37// forcing an ack regularly.
42#define IDLE_PING 2. 38#define IDLE_PING 2.
43 39
44void 40void
45client::flush () 41client::flush ()
46{ 42{
47 if (destroyed ()) 43 if (destroyed ())
48 return; 44 return;
49
50#if HAVE_TCP_INFO
51 // check about once per second, spread evenly over all clients
52 if (!((pticks + fd) & 7))
53 {
54 // check time of last ack, and, if too old, kill connection
55 struct tcp_info tcpi;
56 socklen_t len = sizeof (tcpi);
57
58 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
59 {
60 rtt = tcpi.tcpi_rtt;
61 rttvar = tcpi.tcpi_rttvar;
62
63 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
64 {
65 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
66 write_outputbuffer ();
67
68 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
69 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
70 destroy ();
71 }
72 }
73 }
74#endif
75 45
76 /** 46 /**
77 * Writes data to socket. 47 * Writes data to socket.
78 * 48 *
79 * When the socket is clear to write, and we have backlogged data, this 49 * When the socket is clear to write, and we have backlogged data, this
… …
81 */ 51 */
82 52
83 // write a nop to the socket at least every IDLE_NOP seconds. 53 // write a nop to the socket at least every IDLE_NOP seconds.
84 if (!outputbuffer.len) 54 if (!outputbuffer.len)
85 { 55 {
86 if (last_send + IDLE_PING <= NOW) 56 if (last_send + IDLE_PING <= NOW && pl && pl->active)
87 { 57 {
88 // this is a bit ugly, but map1/map1a seem to be the only 58 // this is a bit ugly, but map1/map1a seem to be the only
89 // nop'able commands and they are quite small. 59 // nop'able commands and they are quite small.
90 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 60 packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
91 send_packet (sl); 61 send_packet (sl);
92 } 62 }
93 else 63 else
94 return; 64 return;
95 } 65 }
96 66
97 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
98 return; 68 return;
99 69
100 last_send = NOW; 70 last_send = NOW;
101 write_outputbuffer (); 71 write_outputbuffer ();
102} 72}
… …
129 // just retry 99 // just retry
130 } 100 }
131 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
132 { 102 {
133 // delay till ready 103 // delay till ready
134 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
135 socket_ev.start (); 105 socket_ev.start ();
136 return; 106 return;
137 } 107 }
138 else 108 else
139 { 109 {
… …
141 destroy (); 111 destroy ();
142 return; 112 return;
143 } 113 }
144 } 114 }
145 115
146 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
147} 117}
148 118
149/****************************************************************************** 119/******************************************************************************
150 * 120 *
151 * Start of read routines. 121 * Start of read routines.
… …
162 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
163 return 2 + pkt_len; 133 return 2 + pkt_len;
164 134
165 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
166 { 136 {
167 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); 137 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY);
168 destroy (); 138 destroy ();
169 return -1; 139 return -1;
170 } 140 }
171 } 141 }
172 142
… …
210 {"reply", SC(ReplyCmd) 0 }, 180 {"reply", SC(ReplyCmd) 0 },
211 {"exti", SC(ExtiCmd) 0 }, // CF+ 181 {"exti", SC(ExtiCmd) 0 }, // CF+
212 {"addme", SC(AddMeCmd) 0 }, 182 {"addme", SC(AddMeCmd) 0 },
213 {"askface", SC(AskFaceCmd) 0 }, 183 {"askface", SC(AskFaceCmd) 0 },
214 {"requestinfo", SC(RequestInfo) 0 }, 184 {"requestinfo", SC(RequestInfo) 0 },
215 {"setfacemode", SC(SetFaceMode) 0 },
216 {"setsound", SC(SetSound) 0 }, 185 {"setsound", SC(SetSound) 0 },
217 {"setup", SC(SetUp) 0 }, 186 {"setup", SC(SetUp) 0 },
218 {"version", SC(VersionCmd) 0 }, 187 {"version", SC(VersionCmd) 0 },
219 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
220 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 188 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
221 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
222}; 189};
223 190
224bool 191bool
225client::may_execute (const packet_type *pkt) const 192client::may_execute (const packet_type *pkt) const
226{ 193{
… …
246 { 213 {
247 data += 6; 214 data += 6;
248 len -= 6; 215 len -= 6;
249 } 216 }
250 217
251 if (len > 4 && !strncmp (data, "say " , 4)) 218 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
252 return true; 219 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
253 if (len > 5 && !strncmp (data, "chat ", 5)) 220 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
254 return true; 221
222 if (len == 7 && !strcmp (data, "suicide")) return true;
255 223
256 return false; 224 return false;
257} 225}
258 226
259void 227void
… …
266 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 234 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
267 else 235 else
268 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 236 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
269 } 237 }
270 else 238 else
271 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 239 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
272} 240}
273 241
274bool 242bool
275client::handle_packet () 243client::handle_packet ()
276{ 244{
… …
317 285
318 goto next_packet; 286 goto next_packet;
319 } 287 }
320 288
321 // If we get here, we didn't find a valid command. 289 // If we get here, we didn't find a valid command.
322 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 290 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
323next_packet: 291next_packet:
324 skip_packet (pkt_len); 292 skip_packet (pkt_len);
325 293
326 // input buffer has space again 294 // input buffer has space again
327 socket_ev.poll (socket_ev.poll () | PE_R); 295 socket_ev.poll (socket_ev.poll () | EV_READ);
328 296
329 return true; 297 return true;
330} 298}
331 299
332// callback called when socket is either readable or writable 300// callback called when socket is either readable or writable
333void 301void
334client::socket_cb (iow &w, int got) 302client::socket_cb (iow &w, int revents)
335{ 303{
336 //TODO remove when we have better socket cleanup logic 304 //TODO remove when we have better socket cleanup logic
337 if (destroyed ()) 305 if (destroyed ())
338 { 306 {
339 socket_ev.poll (0); 307 socket_ev.poll (0);
340 return; 308 return;
341 } 309 }
342 310
343 if (got & PE_W) 311 if (revents & EV_WRITE)
344 { 312 {
345 write_outputbuffer (); 313 write_outputbuffer ();
346 314
347 if (!outputbuffer.len) 315 if (!outputbuffer.len)
348 socket_ev.poll (socket_ev.poll () & ~PE_W); 316 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
349 } 317 }
350 318
351 if (got & PE_R) 319 if (revents & EV_READ)
352 { 320 {
353 //TODO: rate-limit tcp connection in better ways, important 321 //TODO: rate-limit tcp connection in better ways, important
354 322
355 int amount = sizeof (inbuf) - inbuf_len; 323 int amount = sizeof (inbuf) - inbuf_len;
356 324
357 if (!amount) 325 if (!amount)
358 { 326 {
359 // input buffer full 327 // input buffer full
360 socket_ev.poll (socket_ev.poll () & ~PE_R); 328 socket_ev.poll (socket_ev.poll () & ~EV_READ);
361 return; 329 return;
362 } 330 }
363 331
364 amount = read (fd, inbuf + inbuf_len, amount); 332 amount = read (fd, inbuf + inbuf_len, amount);
365 333
… …
381 } 349 }
382 else 350 else
383 { 351 {
384 inbuf_len += amount; 352 inbuf_len += amount;
385 353
386 cmd_ev.start ();
387 }
388 }
389}
390
391// called whenever we have additional commands to process
392void
393client::cmd_cb (iw &w)
394{
395 if (handle_packet ()) 354 if (handle_packet ())
396 w.start (); 355 {
397 else 356 while (handle_packet ())
398 flush (); 357 ;
358
359 flush ();
360 }
361 }
362 }
399} 363}
400 364
401/******************************************************************************* 365/*******************************************************************************
402 * 366 *
403 * Start of write related routines. 367 * Start of write related routines.
… …
459client::send_packet (packet &sl) 423client::send_packet (packet &sl)
460{ 424{
461 if (destroyed ()) 425 if (destroyed ())
462 return; 426 return;
463 427
464 if (sl.length () >= MAXSOCKBUF) 428 if (sl.length () > MAXSOCKBUF)
465 { 429 {
466 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 430 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
467 /* Almost certainly we've overflowed a buffer, so quit now to make 431 /* Almost certainly we've overflowed a buffer, so quit now to make
468 * it easier to debug. 432 * it easier to debug.
469 */ 433 */
… …
508 472
509 send_packet (sl); 473 send_packet (sl);
510} 474}
511 475
512void 476void
477client::send_msg (int color, const char *type, const char *msg)
478{
479 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
480 {
481 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
482 return;
483 }
484
485 int len = strlen (msg);
486
487 if (!(color & NDI_VERBATIM)
488 && (msg_is_special (msg)
489 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
490 cfperl_send_msg (this, color, type, msg);
491 else
492 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
493}
494
495void
513client::send_drawinfo (const char *msg, int flags) 496client::send_drawinfo (const char *msg, int flags)
514{ 497{
515 send_packet_printf ("drawinfo %d %s", flags, msg); 498 send_msg (flags, "log", msg);
516}
517
518void
519client::send_msg (int color, const char *type, const char *msg)
520{
521 if (can_msg)
522 send_packet_printf ("msg %d %s %s", color, type, msg);
523 else if (color < 0)
524 return; // client cannot handle this
525 else if (strchr (msg, '<') || strchr (msg, '&'))
526 {
527 //TODO: should escape/modify to old syntax
528 send_packet_printf ("drawinfo %d %s", color, msg);
529 }
530 else
531 send_packet_printf ("drawinfo %d %s", color, msg);
532} 499}
533 500
534/*********************************************************************** 501/***********************************************************************
535 * 502 *
536 * packet functions/utilities 503 * packet functions/utilities

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