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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.55 by root, Sun Jul 29 13:36:40 2007 UTC vs.
Revision 1.75 by root, Fri Mar 26 01:04:45 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// 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 time of last ack, and, if too old, kill connection
51 socklen_t len = sizeof (tcpi);
52
53 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
54 {
55 if (tcpi.tcpi_snd_mss)
56 mss = tcpi.tcpi_snd_mss;
57
58#if 0
59 fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n",
60 tcpi.tcpi_unacked,
61 tcpi.tcpi_sacked,
62 tcpi.tcpi_lost,
63 tcpi.tcpi_retrans,
64 tcpi.tcpi_fackets,
65 tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss,
66
67 tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked));
68#endif
69
70 // do this only when player is active
71 if (pl && pl->active
72 && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
73 {
74 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
75 write_outputbuffer ();
76
77 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
78 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
79 destroy ();
80 }
81 }
82#endif
83 45
84 /** 46 /**
85 * Writes data to socket. 47 * Writes data to socket.
86 * 48 *
87 * 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
… …
100 } 62 }
101 else 63 else
102 return; 64 return;
103 } 65 }
104 66
105 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
106 return; 68 return;
107 69
108 last_send = NOW; 70 last_send = NOW;
109 write_outputbuffer (); 71 write_outputbuffer ();
110} 72}
… …
137 // just retry 99 // just retry
138 } 100 }
139 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
140 { 102 {
141 // delay till ready 103 // delay till ready
142 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
143 socket_ev.start (); 105 socket_ev.start ();
144 return; 106 return;
145 } 107 }
146 else 108 else
147 { 109 {
… …
149 destroy (); 111 destroy ();
150 return; 112 return;
151 } 113 }
152 } 114 }
153 115
154 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
155} 117}
156 118
157/****************************************************************************** 119/******************************************************************************
158 * 120 *
159 * Start of read routines. 121 * Start of read routines.
… …
218 {"reply", SC(ReplyCmd) 0 }, 180 {"reply", SC(ReplyCmd) 0 },
219 {"exti", SC(ExtiCmd) 0 }, // CF+ 181 {"exti", SC(ExtiCmd) 0 }, // CF+
220 {"addme", SC(AddMeCmd) 0 }, 182 {"addme", SC(AddMeCmd) 0 },
221 {"askface", SC(AskFaceCmd) 0 }, 183 {"askface", SC(AskFaceCmd) 0 },
222 {"requestinfo", SC(RequestInfo) 0 }, 184 {"requestinfo", SC(RequestInfo) 0 },
223 {"setfacemode", SC(SetFaceMode) 0 },
224 {"setsound", SC(SetSound) 0 }, 185 {"setsound", SC(SetSound) 0 },
225 {"setup", SC(SetUp) 0 }, 186 {"setup", SC(SetUp) 0 },
226 {"version", SC(VersionCmd) 0 }, 187 {"version", SC(VersionCmd) 0 },
227 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
228 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 188 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
229 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
230}; 189};
231 190
232bool 191bool
233client::may_execute (const packet_type *pkt) const 192client::may_execute (const packet_type *pkt) const
234{ 193{
… …
254 { 213 {
255 data += 6; 214 data += 6;
256 len -= 6; 215 len -= 6;
257 } 216 }
258 217
259 if (len > 4 && !strncmp (data, "say " , 4)) 218 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
260 return true; 219 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
261 if (len > 5 && !strncmp (data, "chat ", 5)) 220 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
262 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;
263 225
264 return false; 226 return false;
265} 227}
266 228
267void 229void
… …
269{ 231{
270 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 232 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
271 { 233 {
272 //TODO: only one format 234 //TODO: only one format
273 if (pkt->flags & PF_PLAYER) 235 if (pkt->flags & PF_PLAYER)
236 {
274 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 237 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
238 pl->need_updated_stats ();
239 }
275 else 240 else
276 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 241 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
277 } 242 }
278 else 243 else
279 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); 244 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
… …
292 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 257 pl && pl->ob ? &pl->ob->name : "[anonymous]");
293 destroy (); 258 destroy ();
294 return false; 259 return false;
295 } 260 }
296 261
262 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
297 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 263 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
298 264
299 /* First, break out beginning word. There are at least 265 /* First, break out beginning word. There are at least
300 * a few commands that do not have any paremeters. If 266 * a few commands that do not have any paremeters. If
301 * we get such a command, don't worry about trying 267 * we get such a command, don't worry about trying
302 * to break it up. 268 * to break it up.
… …
326 goto next_packet; 292 goto next_packet;
327 } 293 }
328 294
329 // If we get here, we didn't find a valid command. 295 // If we get here, we didn't find a valid command.
330 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); 296 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
297
331next_packet: 298next_packet:
299 inbuf [pkt_len] = save_byte; // rather ugly
332 skip_packet (pkt_len); 300 skip_packet (pkt_len);
333 301
334 // input buffer has space again 302 // input buffer has space again
335 socket_ev.poll (socket_ev.poll () | PE_R); 303 socket_ev.poll (socket_ev.poll () | EV_READ);
336 304
337 return true; 305 return true;
338} 306}
339 307
340// callback called when socket is either readable or writable 308// callback called when socket is either readable or writable
341void 309void
342client::socket_cb (iow &w, int got) 310client::socket_cb (iow &w, int revents)
343{ 311{
344 //TODO remove when we have better socket cleanup logic 312 //TODO remove when we have better socket cleanup logic
345 if (destroyed ()) 313 if (destroyed ())
346 { 314 {
347 socket_ev.poll (0); 315 socket_ev.poll (0);
348 return; 316 return;
349 } 317 }
350 318
351 if (got & PE_W) 319 if (revents & EV_WRITE)
352 { 320 {
353 write_outputbuffer (); 321 write_outputbuffer ();
354 322
355 if (!outputbuffer.len) 323 if (!outputbuffer.len)
356 socket_ev.poll (socket_ev.poll () & ~PE_W); 324 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
357 } 325 }
358 326
359 if (got & PE_R) 327 if (revents & EV_READ)
360 { 328 {
361 //TODO: rate-limit tcp connection in better ways, important 329 //TODO: rate-limit tcp connection in better ways, important
362 330
363 int amount = sizeof (inbuf) - inbuf_len; 331 int amount = sizeof (inbuf) - inbuf_len;
364 332
365 if (!amount) 333 if (!amount)
366 { 334 {
367 // input buffer full 335 // input buffer full
368 socket_ev.poll (socket_ev.poll () & ~PE_R); 336 socket_ev.poll (socket_ev.poll () & ~EV_READ);
369 return; 337 return;
370 } 338 }
371 339
372 amount = read (fd, inbuf + inbuf_len, amount); 340 amount = read (fd, inbuf + inbuf_len, amount);
373 341
… …
389 } 357 }
390 else 358 else
391 { 359 {
392 inbuf_len += amount; 360 inbuf_len += amount;
393 361
394 cmd_ev.start ();
395 }
396 }
397}
398
399// called whenever we have additional commands to process
400void
401client::cmd_cb (iw &w)
402{
403 if (handle_packet ()) 362 if (handle_packet ())
404 w.start (); 363 {
405 else 364 while (handle_packet ())
406 flush (); 365 ;
366
367 flush ();
368 }
369 }
370 }
407} 371}
408 372
409/******************************************************************************* 373/*******************************************************************************
410 * 374 *
411 * Start of write related routines. 375 * Start of write related routines.
… …
515 va_end (ap); 479 va_end (ap);
516 480
517 send_packet (sl); 481 send_packet (sl);
518} 482}
519 483
520// returns true when the message needs special (read: perl) treatment
521static bool
522msg_is_special (const char *msg)
523{
524 return msg [strcspn (msg, "<[&\n")];
525}
526
527void 484void
528client::send_msg (int color, const char *type, const char *msg) 485client::send_msg (int color, const char *type, const char *msg)
529{ 486{
487 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
488 {
489 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
490 return;
491 }
492
493 int len = strlen (msg);
494
495 if (!(color & NDI_VERBATIM)
530 if (msg_is_special (msg)) 496 && (msg_is_special (msg)
497 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
531 cfperl_send_msg (this, color, type, msg); 498 cfperl_send_msg (this, color, type, msg);
532 else if (can_msg) 499 else
533 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 500 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
534 else if (color < 0)
535 return; // client cannot handle this
536 else
537 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
538} 501}
539 502
540void 503void
541client::send_drawinfo (const char *msg, int flags) 504client::send_drawinfo (const char *msg, int flags)
542{ 505{

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