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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.50 by root, Thu Jul 12 19:36:58 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 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 (©) 2005,2006,2007,2008,2009,2010 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 6 * Deliantra is free software: you can redistribute it and/or modify it under
8 * it under the terms of the GNU General Public License as published by 7 * the terms of the Affero GNU General Public License as published by the
9 * the Free Software Foundation, either version 3 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
10 * (at your option) any later version. 9 * option) any later version.
11 * 10 *
12 * This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License 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 16 * You should have received a copy of the Affero GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>.
19 * 19 *
20 * 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>
21 */ 21 */
22 22
23using namespace std; 23using namespace std;
24 24
25#include <global.h> 25#include <global.h>
… …
31# include <sys/socket.h> 31# include <sys/socket.h>
32# include <netinet/in.h> 32# include <netinet/in.h>
33# include <netinet/tcp.h> 33# include <netinet/tcp.h>
34#endif 34#endif
35 35
36#define HAVE_SIOCOUTQ 1 //TODO configure.ac support
37#if HAVE_SIOCOUTQ
38# include <linux/sockios.h>
39#endif
40
41// disconnect a socket after this many seconds without an ack
42#define SOCKET_TIMEOUT 8.
43
44// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
45// forcing an ack regularly. 37// forcing an ack regularly.
46#define IDLE_PING 2. 38#define IDLE_PING 2.
47 39
48void 40void
49client::flush () 41client::flush ()
50{ 42{
51 if (destroyed ()) 43 if (destroyed ())
52 return; 44 return;
53
54# if HAVE_SIOCOUTQ
55 {
56 int value;
57
58 if (!ioctl (fd, SIOCOUTQ, &value))
59 outq = value;
60 }
61# endif
62
63#if HAVE_TCP_INFO
64 // check about once per second, spread evenly over all clients
65 // do this only when player is active
66 if (!((pticks + fd) & 7) && pl && pl->active)
67 {
68 // check time of last ack, and, if too old, kill connection
69 struct tcp_info tcpi;
70 socklen_t len = sizeof (tcpi);
71
72 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
73 {
74 if (tcpi.tcpi_snd_mss)
75 mss = tcpi.tcpi_snd_mss;
76
77 rtt = tcpi.tcpi_rtt;
78 rttvar = tcpi.tcpi_rttvar;
79
80 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
81 {
82 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
83 write_outputbuffer ();
84
85 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
86 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
87 destroy ();
88 }
89 }
90 }
91#endif
92 45
93 /** 46 /**
94 * Writes data to socket. 47 * Writes data to socket.
95 * 48 *
96 * 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
… …
109 } 62 }
110 else 63 else
111 return; 64 return;
112 } 65 }
113 66
114 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
115 return; 68 return;
116 69
117 last_send = NOW; 70 last_send = NOW;
118 write_outputbuffer (); 71 write_outputbuffer ();
119} 72}
… …
146 // just retry 99 // just retry
147 } 100 }
148 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
149 { 102 {
150 // delay till ready 103 // delay till ready
151 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
152 socket_ev.start (); 105 socket_ev.start ();
153 return; 106 return;
154 } 107 }
155 else 108 else
156 { 109 {
… …
158 destroy (); 111 destroy ();
159 return; 112 return;
160 } 113 }
161 } 114 }
162 115
163 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
164} 117}
165 118
166/****************************************************************************** 119/******************************************************************************
167 * 120 *
168 * Start of read routines. 121 * Start of read routines.
… …
179 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
180 return 2 + pkt_len; 133 return 2 + pkt_len;
181 134
182 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
183 { 136 {
184 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);
185 destroy (); 138 destroy ();
186 return -1; 139 return -1;
187 } 140 }
188 } 141 }
189 142
… …
203 ****************************************************************************/ 156 ****************************************************************************/
204 157
205// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
206#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
207#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}
208 167
209/** 168/**
210 * Dispatch table for the server. 169 * Dispatch table for the server.
211 */ 170 */
212static struct packet_type packets[] = { 171static struct packet_type packets[] = {
… …
218 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
219 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
220 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
221 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
222 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
223 {"ext", PC(ExtCmd) 0 }, // CF+ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
224 {"mapredraw", PC(MapRedrawCmd) 0 }, 183 {"mapredraw", PC(MapRedrawCmd) 0 },
225 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
226 185
227 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
228 {"exti", SC(ExtiCmd) 0 }, // CF+ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
229 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
230 {"askface", SC(AskFaceCmd) 0 }, 189 {"askface", SC(AskFaceCmd) 0 },
231 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
232 {"setfacemode", SC(SetFaceMode) 0 },
233 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
234 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
235 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
236 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
237 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
238 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
239}; 196};
240 197
241bool 198bool
242client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
243{ 200{
… …
263 { 220 {
264 data += 6; 221 data += 6;
265 len -= 6; 222 len -= 6;
266 } 223 }
267 224
268 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
269 return true; 226 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
270 if (len > 5 && !strncmp (data, "chat ", 5)) 227 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
271 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;
272 232
273 return false; 233 return false;
274} 234}
275 235
276void 236void
… …
278{ 238{
279 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
280 { 240 {
281 //TODO: only one format 241 //TODO: only one format
282 if (pkt->flags & PF_PLAYER) 242 if (pkt->flags & PF_PLAYER)
243 {
283 ((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 }
284 else 247 else
285 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
286 } 249 }
287 else 250 else
288 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);
289} 252}
290 253
291bool 254bool
292client::handle_packet () 255client::handle_packet ()
293{ 256{
… …
301 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
302 destroy (); 265 destroy ();
303 return false; 266 return false;
304 } 267 }
305 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
306 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
307 271
308 /* First, break out beginning word. There are at least 272 /* First, break out beginning word. There are at least
309 * a few commands that do not have any paremeters. If 273 * a few commands that do not have any paremeters. If
310 * we get such a command, don't worry about trying 274 * we get such a command, don't worry about trying
311 * to break it up. 275 * to break it up.
… …
322 { 286 {
323 data = (char *)inbuf + 2; // better read garbage than segfault 287 data = (char *)inbuf + 2; // better read garbage than segfault
324 datalen = 0; 288 datalen = 0;
325 } 289 }
326 290
327 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)
328 if (!strcmp ((char *)inbuf + 2, pkt->name)) 292 if (!strcmp ((char *)inbuf + 2, pkt->name))
329 { 293 {
330 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
331 queue_command (pkt, data, datalen); 295 queue_command (pkt, data, datalen);
332 else 296 else
… …
334 298
335 goto next_packet; 299 goto next_packet;
336 } 300 }
337 301
338 // If we get here, we didn't find a valid command. 302 // If we get here, we didn't find a valid command.
339 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
340next_packet: 305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
341 skip_packet (pkt_len); 307 skip_packet (pkt_len);
342 308
343 // input buffer has space again 309 // input buffer has space again
344 socket_ev.poll (socket_ev.poll () | PE_R); 310 socket_ev.poll (socket_ev.poll () | EV_READ);
345 311
346 return true; 312 return true;
347} 313}
348 314
349// callback called when socket is either readable or writable 315// callback called when socket is either readable or writable
350void 316void
351client::socket_cb (iow &w, int got) 317client::socket_cb (iow &w, int revents)
352{ 318{
353 //TODO remove when we have better socket cleanup logic 319 //TODO remove when we have better socket cleanup logic
354 if (destroyed ()) 320 if (destroyed ())
355 { 321 {
356 socket_ev.poll (0); 322 socket_ev.poll (0);
357 return; 323 return;
358 } 324 }
359 325
360 if (got & PE_W) 326 if (revents & EV_WRITE)
361 { 327 {
362 write_outputbuffer (); 328 write_outputbuffer ();
363 329
364 if (!outputbuffer.len) 330 if (!outputbuffer.len)
365 socket_ev.poll (socket_ev.poll () & ~PE_W); 331 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
366 } 332 }
367 333
368 if (got & PE_R) 334 if (revents & EV_READ)
369 { 335 {
370 //TODO: rate-limit tcp connection in better ways, important 336 //TODO: rate-limit tcp connection in better ways, important
371 337
372 int amount = sizeof (inbuf) - inbuf_len; 338 int amount = sizeof (inbuf) - inbuf_len;
373 339
374 if (!amount) 340 if (!amount)
375 { 341 {
376 // input buffer full 342 // input buffer full
377 socket_ev.poll (socket_ev.poll () & ~PE_R); 343 socket_ev.poll (socket_ev.poll () & ~EV_READ);
378 return; 344 return;
379 } 345 }
380 346
381 amount = read (fd, inbuf + inbuf_len, amount); 347 amount = read (fd, inbuf + inbuf_len, amount);
382 348
… …
398 } 364 }
399 else 365 else
400 { 366 {
401 inbuf_len += amount; 367 inbuf_len += amount;
402 368
403 cmd_ev.start ();
404 }
405 }
406}
407
408// called whenever we have additional commands to process
409void
410client::cmd_cb (iw &w)
411{
412 if (handle_packet ()) 369 if (handle_packet ())
413 w.start (); 370 {
414 else 371 while (handle_packet ())
415 flush (); 372 ;
373
374 flush ();
375 }
376 }
377 }
416} 378}
417 379
418/******************************************************************************* 380/*******************************************************************************
419 * 381 *
420 * Start of write related routines. 382 * Start of write related routines.
… …
476client::send_packet (packet &sl) 438client::send_packet (packet &sl)
477{ 439{
478 if (destroyed ()) 440 if (destroyed ())
479 return; 441 return;
480 442
481 if (sl.length () >= MAXSOCKBUF) 443 if (sl.length () > MAXSOCKBUF)
482 { 444 {
483 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 ());
484 /* 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
485 * it easier to debug. 447 * it easier to debug.
486 */ 448 */
… …
524 va_end (ap); 486 va_end (ap);
525 487
526 send_packet (sl); 488 send_packet (sl);
527} 489}
528 490
529// returns true when the message needs special (read: perl) treatment
530static bool
531msg_is_special (const char *msg)
532{
533 return msg [strcspn (msg, "<[&\n")];
534}
535
536void 491void
537client::send_msg (int color, const char *type, const char *msg) 492client::send_msg (int color, const char *type, const char *msg)
538{ 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)
539 if (msg_is_special (msg)) 503 && (msg_is_special (msg)
504 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
540 cfperl_send_msg (this, color, type, msg); 505 cfperl_send_msg (this, color, type, msg);
541 else if (can_msg)
542 send_packet_printf ("msg %d %s %s", color, type, msg);
543 else if (color < 0)
544 return; // client cannot handle this
545 else 506 else
546 send_packet_printf ("drawinfo %d %s", color, msg); 507 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
547} 508}
548 509
549void 510void
550client::send_drawinfo (const char *msg, int flags) 511client::send_drawinfo (const char *msg, int flags)
551{ 512{

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