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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 1.78 by root, Fri Apr 30 20:43:18 2010 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 (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 1992,2007 Frank Tore Johansen
6 * 5 *
7 * Crossfire TRT is free software; you can redistribute it and/or modify it 6 * Deliantra is free software: you can redistribute it and/or modify it under
8 * under the terms of the GNU General Public License as published by the Free 7 * the terms of the Affero GNU General Public License as published by the
9 * Software Foundation; either version 2 of the License, or (at your option) 8 * Free Software Foundation, either version 3 of the License, or (at your
10 * any later version. 9 * option) any later version.
11 * 10 *
12 * This program is distributed in the hope that it will be useful, but 11 * This program is distributed in the hope that it will be useful,
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * for more details. 14 * GNU General Public License for more details.
16 * 15 *
17 * You should have received a copy of the GNU General Public License along 16 * You should have received a copy of the Affero GNU General Public License
18 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 17 * and the GNU General Public License along with this program. If not, see
19 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * <http://www.gnu.org/licenses/>.
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
… …
186 ****************************************************************************/ 156 ****************************************************************************/
187 157
188// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
189#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
190#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | 160#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
161
162static void
163NopCmd (char *, int, client *)
164{
165 // do nothing
166}
191 167
192/** 168/**
193 * Dispatch table for the server. 169 * Dispatch table for the server.
194 */ 170 */
195static struct packet_type packets[] = { 171static struct packet_type packets[] = {
… …
201 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
202 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
203 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
204 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
205 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
206 {"ext", PC(ExtCmd) 0 }, // CF+ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
207 {"mapredraw", PC(MapRedrawCmd) 0 }, 183 {"mapredraw", PC(MapRedrawCmd) 0 },
208 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
209 185
210 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
211 {"exti", SC(ExtiCmd) 0 }, // CF+ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
212 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
213 {"askface", SC(AskFaceCmd) 0 }, 189 {"askface", SC(AskFaceCmd) 0 },
214 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
215 {"setfacemode", SC(SetFaceMode) 0 },
216 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
217 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
218 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
219 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
220 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
221 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
222}; 196};
223 197
224bool 198bool
225client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
226{ 200{
… …
246 { 220 {
247 data += 6; 221 data += 6;
248 len -= 6; 222 len -= 6;
249 } 223 }
250 224
251 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
252 return true; 226 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
253 if (len > 5 && !strncmp (data, "chat ", 5)) 227 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
254 return true; 228 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
229 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
230
231 if (len == 7 && !strcmp (data, "suicide")) return true;
255 232
256 return false; 233 return false;
257} 234}
258 235
259void 236void
… …
261{ 238{
262 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
263 { 240 {
264 //TODO: only one format 241 //TODO: only one format
265 if (pkt->flags & PF_PLAYER) 242 if (pkt->flags & PF_PLAYER)
243 {
266 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 244 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
245 pl->need_updated_stats ();
246 }
267 else 247 else
268 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
269 } 249 }
270 else 250 else
271 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 251 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
272} 252}
273 253
274bool 254bool
275client::handle_packet () 255client::handle_packet ()
276{ 256{
… …
284 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
285 destroy (); 265 destroy ();
286 return false; 266 return false;
287 } 267 }
288 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
289 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
290 271
291 /* First, break out beginning word. There are at least 272 /* First, break out beginning word. There are at least
292 * a few commands that do not have any paremeters. If 273 * a few commands that do not have any paremeters. If
293 * we get such a command, don't worry about trying 274 * we get such a command, don't worry about trying
294 * to break it up. 275 * to break it up.
… …
305 { 286 {
306 data = (char *)inbuf + 2; // better read garbage than segfault 287 data = (char *)inbuf + 2; // better read garbage than segfault
307 datalen = 0; 288 datalen = 0;
308 } 289 }
309 290
310 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) 291 for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
311 if (!strcmp ((char *)inbuf + 2, pkt->name)) 292 if (!strcmp ((char *)inbuf + 2, pkt->name))
312 { 293 {
313 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
314 queue_command (pkt, data, datalen); 295 queue_command (pkt, data, datalen);
315 else 296 else
… …
317 298
318 goto next_packet; 299 goto next_packet;
319 } 300 }
320 301
321 // If we get here, we didn't find a valid command. 302 // 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); 303 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
304
323next_packet: 305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
324 skip_packet (pkt_len); 307 skip_packet (pkt_len);
325 308
326 // input buffer has space again 309 // input buffer has space again
327 socket_ev.poll (socket_ev.poll () | PE_R); 310 socket_ev.poll (socket_ev.poll () | EV_READ);
328 311
329 return true; 312 return true;
330} 313}
331 314
332// callback called when socket is either readable or writable 315// callback called when socket is either readable or writable
333void 316void
334client::socket_cb (iow &w, int got) 317client::socket_cb (iow &w, int revents)
335{ 318{
336 //TODO remove when we have better socket cleanup logic 319 //TODO remove when we have better socket cleanup logic
337 if (destroyed ()) 320 if (destroyed ())
338 { 321 {
339 socket_ev.poll (0); 322 socket_ev.poll (0);
340 return; 323 return;
341 } 324 }
342 325
343 if (got & PE_W) 326 if (revents & EV_WRITE)
344 { 327 {
345 write_outputbuffer (); 328 write_outputbuffer ();
346 329
347 if (!outputbuffer.len) 330 if (!outputbuffer.len)
348 socket_ev.poll (socket_ev.poll () & ~PE_W); 331 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
349 } 332 }
350 333
351 if (got & PE_R) 334 if (revents & EV_READ)
352 { 335 {
353 //TODO: rate-limit tcp connection in better ways, important 336 //TODO: rate-limit tcp connection in better ways, important
354 337
355 int amount = sizeof (inbuf) - inbuf_len; 338 int amount = sizeof (inbuf) - inbuf_len;
356 339
357 if (!amount) 340 if (!amount)
358 { 341 {
359 // input buffer full 342 // input buffer full
360 socket_ev.poll (socket_ev.poll () & ~PE_R); 343 socket_ev.poll (socket_ev.poll () & ~EV_READ);
361 return; 344 return;
362 } 345 }
363 346
364 amount = read (fd, inbuf + inbuf_len, amount); 347 amount = read (fd, inbuf + inbuf_len, amount);
365 348
… …
381 } 364 }
382 else 365 else
383 { 366 {
384 inbuf_len += amount; 367 inbuf_len += amount;
385 368
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 ()) 369 if (handle_packet ())
396 w.start (); 370 {
397 else 371 while (handle_packet ())
398 flush (); 372 ;
373
374 flush ();
375 }
376 }
377 }
399} 378}
400 379
401/******************************************************************************* 380/*******************************************************************************
402 * 381 *
403 * Start of write related routines. 382 * Start of write related routines.
… …
459client::send_packet (packet &sl) 438client::send_packet (packet &sl)
460{ 439{
461 if (destroyed ()) 440 if (destroyed ())
462 return; 441 return;
463 442
464 if (sl.length () >= MAXSOCKBUF) 443 if (sl.length () > MAXSOCKBUF)
465 { 444 {
466 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 445 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 446 /* Almost certainly we've overflowed a buffer, so quit now to make
468 * it easier to debug. 447 * it easier to debug.
469 */ 448 */
… …
508 487
509 send_packet (sl); 488 send_packet (sl);
510} 489}
511 490
512void 491void
492client::send_msg (int color, const char *type, const char *msg)
493{
494 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
495 {
496 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
497 return;
498 }
499
500 int len = strlen (msg);
501
502 if (!(color & NDI_VERBATIM)
503 && (msg_is_special (msg)
504 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
505 cfperl_send_msg (this, color, type, msg);
506 else
507 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
508}
509
510void
513client::send_drawinfo (const char *msg, int flags) 511client::send_drawinfo (const char *msg, int flags)
514{ 512{
515 send_packet_printf ("drawinfo %d %s", flags, msg); 513 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} 514}
533 515
534/*********************************************************************** 516/***********************************************************************
535 * 517 *
536 * packet functions/utilities 518 * packet functions/utilities

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