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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.51 by root, Sat Jul 28 00:15:03 2007 UTC vs.
Revision 1.73 by root, Tue Nov 3 23:44:21 2009 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 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// disconnect a socket after this many seconds without an ack
37#define SOCKET_TIMEOUT 8.
38
39// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
40// forcing an ack regularly. 37// forcing an ack regularly.
41#define IDLE_PING 2. 38#define IDLE_PING 2.
42 39
43void 40void
44client::flush () 41client::flush ()
45{ 42{
46 if (destroyed ()) 43 if (destroyed ())
47 return; 44 return;
48
49#if HAVE_TCP_INFO
50 // check about once per second, spread evenly over all clients
51 // do this only when player is active
52 if (!((pticks + fd) & 7) && pl && pl->active)
53 {
54 // check time of last ack, and, if too old, kill connection
55 socklen_t len = sizeof (tcpi);
56
57 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
58 {
59 if (tcpi.tcpi_snd_mss)
60 mss = tcpi.tcpi_snd_mss;
61
62 fprintf (stderr, "uack %d sst %d cwnd %d mss %d pmtu %d\n",
63 tcpi.tcpi_unacked, tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu);
64
65 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
66 {
67 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
68 write_outputbuffer ();
69
70 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
71 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
72 destroy ();
73 }
74 }
75 }
76#endif
77 45
78 /** 46 /**
79 * Writes data to socket. 47 * Writes data to socket.
80 * 48 *
81 * 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
… …
94 } 62 }
95 else 63 else
96 return; 64 return;
97 } 65 }
98 66
99 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
100 return; 68 return;
101 69
102 last_send = NOW; 70 last_send = NOW;
103 write_outputbuffer (); 71 write_outputbuffer ();
104} 72}
… …
131 // just retry 99 // just retry
132 } 100 }
133 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
134 { 102 {
135 // delay till ready 103 // delay till ready
136 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
137 socket_ev.start (); 105 socket_ev.start ();
138 return; 106 return;
139 } 107 }
140 else 108 else
141 { 109 {
… …
143 destroy (); 111 destroy ();
144 return; 112 return;
145 } 113 }
146 } 114 }
147 115
148 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
149} 117}
150 118
151/****************************************************************************** 119/******************************************************************************
152 * 120 *
153 * Start of read routines. 121 * Start of read routines.
… …
164 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
165 return 2 + pkt_len; 133 return 2 + pkt_len;
166 134
167 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
168 { 136 {
169 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);
170 destroy (); 138 destroy ();
171 return -1; 139 return -1;
172 } 140 }
173 } 141 }
174 142
… …
212 {"reply", SC(ReplyCmd) 0 }, 180 {"reply", SC(ReplyCmd) 0 },
213 {"exti", SC(ExtiCmd) 0 }, // CF+ 181 {"exti", SC(ExtiCmd) 0 }, // CF+
214 {"addme", SC(AddMeCmd) 0 }, 182 {"addme", SC(AddMeCmd) 0 },
215 {"askface", SC(AskFaceCmd) 0 }, 183 {"askface", SC(AskFaceCmd) 0 },
216 {"requestinfo", SC(RequestInfo) 0 }, 184 {"requestinfo", SC(RequestInfo) 0 },
217 {"setfacemode", SC(SetFaceMode) 0 },
218 {"setsound", SC(SetSound) 0 }, 185 {"setsound", SC(SetSound) 0 },
219 {"setup", SC(SetUp) 0 }, 186 {"setup", SC(SetUp) 0 },
220 {"version", SC(VersionCmd) 0 }, 187 {"version", SC(VersionCmd) 0 },
221 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
222 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 188 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
223 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
224}; 189};
225 190
226bool 191bool
227client::may_execute (const packet_type *pkt) const 192client::may_execute (const packet_type *pkt) const
228{ 193{
… …
248 { 213 {
249 data += 6; 214 data += 6;
250 len -= 6; 215 len -= 6;
251 } 216 }
252 217
253 if (len > 4 && !strncmp (data, "say " , 4)) 218 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
254 return true; 219 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
255 if (len > 5 && !strncmp (data, "chat ", 5)) 220 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
256 return true; 221 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
222 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
223
224 if (len == 7 && !strcmp (data, "suicide")) return true;
257 225
258 return false; 226 return false;
259} 227}
260 228
261void 229void
… …
268 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 236 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
269 else 237 else
270 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 238 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
271 } 239 }
272 else 240 else
273 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 241 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
274} 242}
275 243
276bool 244bool
277client::handle_packet () 245client::handle_packet ()
278{ 246{
… …
286 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 254 pl && pl->ob ? &pl->ob->name : "[anonymous]");
287 destroy (); 255 destroy ();
288 return false; 256 return false;
289 } 257 }
290 258
259 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
291 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 260 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
292 261
293 /* First, break out beginning word. There are at least 262 /* First, break out beginning word. There are at least
294 * a few commands that do not have any paremeters. If 263 * a few commands that do not have any paremeters. If
295 * we get such a command, don't worry about trying 264 * we get such a command, don't worry about trying
296 * to break it up. 265 * to break it up.
… …
319 288
320 goto next_packet; 289 goto next_packet;
321 } 290 }
322 291
323 // If we get here, we didn't find a valid command. 292 // If we get here, we didn't find a valid command.
324 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 293 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
294
325next_packet: 295next_packet:
296 inbuf [pkt_len] = save_byte; // rather ugly
326 skip_packet (pkt_len); 297 skip_packet (pkt_len);
327 298
328 // input buffer has space again 299 // input buffer has space again
329 socket_ev.poll (socket_ev.poll () | PE_R); 300 socket_ev.poll (socket_ev.poll () | EV_READ);
330 301
331 return true; 302 return true;
332} 303}
333 304
334// callback called when socket is either readable or writable 305// callback called when socket is either readable or writable
335void 306void
336client::socket_cb (iow &w, int got) 307client::socket_cb (iow &w, int revents)
337{ 308{
338 //TODO remove when we have better socket cleanup logic 309 //TODO remove when we have better socket cleanup logic
339 if (destroyed ()) 310 if (destroyed ())
340 { 311 {
341 socket_ev.poll (0); 312 socket_ev.poll (0);
342 return; 313 return;
343 } 314 }
344 315
345 if (got & PE_W) 316 if (revents & EV_WRITE)
346 { 317 {
347 write_outputbuffer (); 318 write_outputbuffer ();
348 319
349 if (!outputbuffer.len) 320 if (!outputbuffer.len)
350 socket_ev.poll (socket_ev.poll () & ~PE_W); 321 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
351 } 322 }
352 323
353 if (got & PE_R) 324 if (revents & EV_READ)
354 { 325 {
355 //TODO: rate-limit tcp connection in better ways, important 326 //TODO: rate-limit tcp connection in better ways, important
356 327
357 int amount = sizeof (inbuf) - inbuf_len; 328 int amount = sizeof (inbuf) - inbuf_len;
358 329
359 if (!amount) 330 if (!amount)
360 { 331 {
361 // input buffer full 332 // input buffer full
362 socket_ev.poll (socket_ev.poll () & ~PE_R); 333 socket_ev.poll (socket_ev.poll () & ~EV_READ);
363 return; 334 return;
364 } 335 }
365 336
366 amount = read (fd, inbuf + inbuf_len, amount); 337 amount = read (fd, inbuf + inbuf_len, amount);
367 338
… …
383 } 354 }
384 else 355 else
385 { 356 {
386 inbuf_len += amount; 357 inbuf_len += amount;
387 358
388 cmd_ev.start ();
389 }
390 }
391}
392
393// called whenever we have additional commands to process
394void
395client::cmd_cb (iw &w)
396{
397 if (handle_packet ()) 359 if (handle_packet ())
398 w.start (); 360 {
399 else 361 while (handle_packet ())
400 flush (); 362 ;
363
364 flush ();
365 }
366 }
367 }
401} 368}
402 369
403/******************************************************************************* 370/*******************************************************************************
404 * 371 *
405 * Start of write related routines. 372 * Start of write related routines.
… …
461client::send_packet (packet &sl) 428client::send_packet (packet &sl)
462{ 429{
463 if (destroyed ()) 430 if (destroyed ())
464 return; 431 return;
465 432
466 if (sl.length () >= MAXSOCKBUF) 433 if (sl.length () > MAXSOCKBUF)
467 { 434 {
468 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 435 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
469 /* Almost certainly we've overflowed a buffer, so quit now to make 436 /* Almost certainly we've overflowed a buffer, so quit now to make
470 * it easier to debug. 437 * it easier to debug.
471 */ 438 */
… …
509 va_end (ap); 476 va_end (ap);
510 477
511 send_packet (sl); 478 send_packet (sl);
512} 479}
513 480
514// returns true when the message needs special (read: perl) treatment
515static bool
516msg_is_special (const char *msg)
517{
518 return msg [strcspn (msg, "<[&\n")];
519}
520
521void 481void
522client::send_msg (int color, const char *type, const char *msg) 482client::send_msg (int color, const char *type, const char *msg)
523{ 483{
484 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
485 {
486 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
487 return;
488 }
489
490 int len = strlen (msg);
491
492 if (!(color & NDI_VERBATIM)
524 if (msg_is_special (msg)) 493 && (msg_is_special (msg)
494 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
525 cfperl_send_msg (this, color, type, msg); 495 cfperl_send_msg (this, color, type, msg);
526 else if (can_msg)
527 send_packet_printf ("msg %d %s %s", color, type, msg);
528 else if (color < 0)
529 return; // client cannot handle this
530 else 496 else
531 send_packet_printf ("drawinfo %d %s", color, msg); 497 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
532} 498}
533 499
534void 500void
535client::send_drawinfo (const char *msg, int flags) 501client::send_drawinfo (const char *msg, int flags)
536{ 502{

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