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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.48 by root, Sun Jun 24 04:09:29 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 // do this only when player is active
53 if (!((pticks + fd) & 7) && pl && pl->active)
54 {
55 // check time of last ack, and, if too old, kill connection
56 struct tcp_info tcpi;
57 socklen_t len = sizeof (tcpi);
58
59 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
60 {
61 if (tcpi.tcpi_snd_mss)
62 mss = tcpi.tcpi_snd_mss;
63
64 rtt = tcpi.tcpi_rtt;
65 rttvar = tcpi.tcpi_rttvar;
66
67 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
68 {
69 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
70 write_outputbuffer ();
71
72 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
73 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
74 destroy ();
75 }
76 }
77 }
78#endif
79 45
80 /** 46 /**
81 * Writes data to socket. 47 * Writes data to socket.
82 * 48 *
83 * 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
… …
96 } 62 }
97 else 63 else
98 return; 64 return;
99 } 65 }
100 66
101 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
102 return; 68 return;
103 69
104 last_send = NOW; 70 last_send = NOW;
105 write_outputbuffer (); 71 write_outputbuffer ();
106} 72}
… …
133 // just retry 99 // just retry
134 } 100 }
135 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
136 { 102 {
137 // delay till ready 103 // delay till ready
138 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
139 socket_ev.start (); 105 socket_ev.start ();
140 return; 106 return;
141 } 107 }
142 else 108 else
143 { 109 {
… …
145 destroy (); 111 destroy ();
146 return; 112 return;
147 } 113 }
148 } 114 }
149 115
150 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
151} 117}
152 118
153/****************************************************************************** 119/******************************************************************************
154 * 120 *
155 * Start of read routines. 121 * Start of read routines.
… …
166 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
167 return 2 + pkt_len; 133 return 2 + pkt_len;
168 134
169 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
170 { 136 {
171 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);
172 destroy (); 138 destroy ();
173 return -1; 139 return -1;
174 } 140 }
175 } 141 }
176 142
… …
214 {"reply", SC(ReplyCmd) 0 }, 180 {"reply", SC(ReplyCmd) 0 },
215 {"exti", SC(ExtiCmd) 0 }, // CF+ 181 {"exti", SC(ExtiCmd) 0 }, // CF+
216 {"addme", SC(AddMeCmd) 0 }, 182 {"addme", SC(AddMeCmd) 0 },
217 {"askface", SC(AskFaceCmd) 0 }, 183 {"askface", SC(AskFaceCmd) 0 },
218 {"requestinfo", SC(RequestInfo) 0 }, 184 {"requestinfo", SC(RequestInfo) 0 },
219 {"setfacemode", SC(SetFaceMode) 0 },
220 {"setsound", SC(SetSound) 0 }, 185 {"setsound", SC(SetSound) 0 },
221 {"setup", SC(SetUp) 0 }, 186 {"setup", SC(SetUp) 0 },
222 {"version", SC(VersionCmd) 0 }, 187 {"version", SC(VersionCmd) 0 },
223 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
224 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 188 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
225 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
226}; 189};
227 190
228bool 191bool
229client::may_execute (const packet_type *pkt) const 192client::may_execute (const packet_type *pkt) const
230{ 193{
… …
250 { 213 {
251 data += 6; 214 data += 6;
252 len -= 6; 215 len -= 6;
253 } 216 }
254 217
255 if (len > 4 && !strncmp (data, "say " , 4)) 218 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
256 return true; 219 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
257 if (len > 5 && !strncmp (data, "chat ", 5)) 220 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
258 return true; 221
222 if (len == 7 && !strcmp (data, "suicide")) return true;
259 223
260 return false; 224 return false;
261} 225}
262 226
263void 227void
… …
270 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 234 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
271 else 235 else
272 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 236 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
273 } 237 }
274 else 238 else
275 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);
276} 240}
277 241
278bool 242bool
279client::handle_packet () 243client::handle_packet ()
280{ 244{
… …
321 285
322 goto next_packet; 286 goto next_packet;
323 } 287 }
324 288
325 // If we get here, we didn't find a valid command. 289 // If we get here, we didn't find a valid command.
326 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);
327next_packet: 291next_packet:
328 skip_packet (pkt_len); 292 skip_packet (pkt_len);
329 293
330 // input buffer has space again 294 // input buffer has space again
331 socket_ev.poll (socket_ev.poll () | PE_R); 295 socket_ev.poll (socket_ev.poll () | EV_READ);
332 296
333 return true; 297 return true;
334} 298}
335 299
336// callback called when socket is either readable or writable 300// callback called when socket is either readable or writable
337void 301void
338client::socket_cb (iow &w, int got) 302client::socket_cb (iow &w, int revents)
339{ 303{
340 //TODO remove when we have better socket cleanup logic 304 //TODO remove when we have better socket cleanup logic
341 if (destroyed ()) 305 if (destroyed ())
342 { 306 {
343 socket_ev.poll (0); 307 socket_ev.poll (0);
344 return; 308 return;
345 } 309 }
346 310
347 if (got & PE_W) 311 if (revents & EV_WRITE)
348 { 312 {
349 write_outputbuffer (); 313 write_outputbuffer ();
350 314
351 if (!outputbuffer.len) 315 if (!outputbuffer.len)
352 socket_ev.poll (socket_ev.poll () & ~PE_W); 316 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
353 } 317 }
354 318
355 if (got & PE_R) 319 if (revents & EV_READ)
356 { 320 {
357 //TODO: rate-limit tcp connection in better ways, important 321 //TODO: rate-limit tcp connection in better ways, important
358 322
359 int amount = sizeof (inbuf) - inbuf_len; 323 int amount = sizeof (inbuf) - inbuf_len;
360 324
361 if (!amount) 325 if (!amount)
362 { 326 {
363 // input buffer full 327 // input buffer full
364 socket_ev.poll (socket_ev.poll () & ~PE_R); 328 socket_ev.poll (socket_ev.poll () & ~EV_READ);
365 return; 329 return;
366 } 330 }
367 331
368 amount = read (fd, inbuf + inbuf_len, amount); 332 amount = read (fd, inbuf + inbuf_len, amount);
369 333
… …
385 } 349 }
386 else 350 else
387 { 351 {
388 inbuf_len += amount; 352 inbuf_len += amount;
389 353
390 cmd_ev.start ();
391 }
392 }
393}
394
395// called whenever we have additional commands to process
396void
397client::cmd_cb (iw &w)
398{
399 if (handle_packet ()) 354 if (handle_packet ())
400 w.start (); 355 {
401 else 356 while (handle_packet ())
402 flush (); 357 ;
358
359 flush ();
360 }
361 }
362 }
403} 363}
404 364
405/******************************************************************************* 365/*******************************************************************************
406 * 366 *
407 * Start of write related routines. 367 * Start of write related routines.
… …
463client::send_packet (packet &sl) 423client::send_packet (packet &sl)
464{ 424{
465 if (destroyed ()) 425 if (destroyed ())
466 return; 426 return;
467 427
468 if (sl.length () >= MAXSOCKBUF) 428 if (sl.length () > MAXSOCKBUF)
469 { 429 {
470 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 ());
471 /* 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
472 * it easier to debug. 432 * it easier to debug.
473 */ 433 */
… …
511 va_end (ap); 471 va_end (ap);
512 472
513 send_packet (sl); 473 send_packet (sl);
514} 474}
515 475
516// returns true when the message needs special (read: perl) treatment
517static bool
518msg_is_special (const char *msg)
519{
520 return msg [strcspn (msg, "<[&\n")];
521}
522
523void 476void
524client::send_msg (int color, const char *type, const char *msg) 477client::send_msg (int color, const char *type, const char *msg)
525{ 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)
526 if (msg_is_special (msg)) 488 && (msg_is_special (msg)
489 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
527 cfperl_send_msg (this, color, type, msg); 490 cfperl_send_msg (this, color, type, msg);
528 else if (can_msg)
529 send_packet_printf ("msg %d %s %s", color, type, msg);
530 else if (color < 0)
531 return; // client cannot handle this
532 else 491 else
533 send_packet_printf ("drawinfo %d %s", color, msg); 492 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
534} 493}
535 494
536void 495void
537client::send_drawinfo (const char *msg, int flags) 496client::send_drawinfo (const char *msg, int flags)
538{ 497{

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