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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC vs.
Revision 1.86 by root, Tue Oct 30 17:07:50 2012 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 (©) 2005,2006,2007,2008,2009,2010,2011,2012 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 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 if (tcpi.tcpi_snd_mss)
61 mss = tcpi.tcpi_snd_mss;
62
63 rtt = tcpi.tcpi_rtt;
64 rttvar = tcpi.tcpi_rttvar;
65
66 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
67 {
68 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
69 write_outputbuffer ();
70
71 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
72 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
73 destroy ();
74 }
75 }
76 }
77#endif
78 45
79 /** 46 /**
80 * Writes data to socket. 47 * Writes data to socket.
81 * 48 *
82 * 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
… …
86 // 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.
87 if (!outputbuffer.len) 54 if (!outputbuffer.len)
88 { 55 {
89 if (last_send + IDLE_PING <= NOW && pl && pl->active) 56 if (last_send + IDLE_PING <= NOW && pl && pl->active)
90 { 57 {
91 // this is a bit ugly, but map1/map1a seem to be the only 58 // this is a bit ugly, but map1a seems to be the only
92 // nop'able commands and they are quite small. 59 // nop'able command and it is quite small.
93 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 60 packet sl ("map1a");
94 send_packet (sl); 61 send_packet (sl);
95 } 62 }
96 else 63 else
97 return; 64 return;
98 } 65 }
99 66
100 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
101 return; 68 return;
102 69
103 last_send = NOW; 70 last_send = NOW;
104 write_outputbuffer (); 71 write_outputbuffer ();
105} 72}
… …
132 // just retry 99 // just retry
133 } 100 }
134 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
135 { 102 {
136 // delay till ready 103 // delay till ready
137 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
138 socket_ev.start (); 105 socket_ev.start ();
139 return; 106 return;
140 } 107 }
141 else 108 else
142 { 109 {
… …
144 destroy (); 111 destroy ();
145 return; 112 return;
146 } 113 }
147 } 114 }
148 115
149 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
150} 117}
151 118
152/****************************************************************************** 119/******************************************************************************
153 * 120 *
154 * Start of read routines. 121 * Start of read routines.
… …
165 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
166 return 2 + pkt_len; 133 return 2 + pkt_len;
167 134
168 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
169 { 136 {
170 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);
171 destroy (); 138 destroy ();
172 return -1; 139 return -1;
173 } 140 }
174 } 141 }
175 142
… …
189 ****************************************************************************/ 156 ****************************************************************************/
190 157
191// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
192#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
193#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}
194 167
195/** 168/**
196 * Dispatch table for the server. 169 * Dispatch table for the server.
197 */ 170 */
198static struct packet_type packets[] = { 171static struct packet_type packets[] = {
… …
204 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
205 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
206 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
207 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
208 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
209 {"ext", PC(ExtCmd) 0 }, // CF+ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
210 {"mapredraw", PC(MapRedrawCmd) 0 }, 183 {"mapredraw", PC(MapRedrawCmd) 0 },
211 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
212 185
213 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
214 {"exti", SC(ExtiCmd) 0 }, // CF+ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
215 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
216 {"askface", SC(AskFaceCmd) 0 }, 189 {"askface", SC(AskFaceCmd) 0 },
217 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
218 {"setfacemode", SC(SetFaceMode) 0 },
219 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
220 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
221 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
222 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
223 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
224 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
225}; 196};
226 197
227bool 198bool
228client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
229{ 200{
… …
249 { 220 {
250 data += 6; 221 data += 6;
251 len -= 6; 222 len -= 6;
252 } 223 }
253 224
254 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
255 return true; 226 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
256 if (len > 5 && !strncmp (data, "chat ", 5)) 227 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
257 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;
258 232
259 return false; 233 return false;
260} 234}
261 235
262void 236void
… …
264{ 238{
265 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
266 { 240 {
267 //TODO: only one format 241 //TODO: only one format
268 if (pkt->flags & PF_PLAYER) 242 if (pkt->flags & PF_PLAYER)
243 {
269 ((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 }
270 else 247 else
271 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
272 } 249 }
273 else 250 else
274 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);
275} 252}
276 253
277bool 254bool
278client::handle_packet () 255client::handle_packet ()
279{ 256{
… …
287 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
288 destroy (); 265 destroy ();
289 return false; 266 return false;
290 } 267 }
291 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
292 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
293 271
294 /* First, break out beginning word. There are at least 272 /* First, break out beginning word. There are at least
295 * a few commands that do not have any paremeters. If 273 * a few commands that do not have any paremeters. If
296 * we get such a command, don't worry about trying 274 * we get such a command, don't worry about trying
297 * to break it up. 275 * to break it up.
… …
308 { 286 {
309 data = (char *)inbuf + 2; // better read garbage than segfault 287 data = (char *)inbuf + 2; // better read garbage than segfault
310 datalen = 0; 288 datalen = 0;
311 } 289 }
312 290
313 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)
314 if (!strcmp ((char *)inbuf + 2, pkt->name)) 292 if (!strcmp ((char *)inbuf + 2, pkt->name))
315 { 293 {
316 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
317 queue_command (pkt, data, datalen); 295 queue_command (pkt, data, datalen);
318 else 296 else
… …
320 298
321 goto next_packet; 299 goto next_packet;
322 } 300 }
323 301
324 // If we get here, we didn't find a valid command. 302 // If we get here, we didn't find a valid command.
325 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
326next_packet: 305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
327 skip_packet (pkt_len); 307 skip_packet (pkt_len);
328 308
329 // input buffer has space again 309 // input buffer has space again
330 socket_ev.poll (socket_ev.poll () | PE_R); 310 socket_ev.poll (socket_ev.poll () | EV_READ);
331 311
332 return true; 312 return true;
333} 313}
334 314
315void
316client::inbuf_handle ()
317{
318 if (!handle_packet ())
319 return;
320
321 while (handle_packet ())
322 ;
323
324 flush ();
325}
326
335// callback called when socket is either readable or writable 327// callback called when socket is either readable or writable
336void 328void
337client::socket_cb (iow &w, int got) 329client::socket_cb (iow &w, int revents)
338{ 330{
339 //TODO remove when we have better socket cleanup logic 331 //TODO remove when we have better socket cleanup logic
340 if (destroyed ()) 332 if (destroyed ())
341 { 333 {
342 socket_ev.poll (0); 334 socket_ev.poll (0);
343 return; 335 return;
344 } 336 }
345 337
346 if (got & PE_W) 338 if (revents & EV_WRITE)
347 { 339 {
348 write_outputbuffer (); 340 write_outputbuffer ();
349 341
350 if (!outputbuffer.len) 342 if (!outputbuffer.len)
351 socket_ev.poll (socket_ev.poll () & ~PE_W); 343 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
352 } 344 }
353 345
354 if (got & PE_R) 346 if (revents & EV_READ)
355 { 347 {
356 //TODO: rate-limit tcp connection in better ways, important 348 //TODO: rate-limit tcp connection in better ways, important
357 349
358 int amount = sizeof (inbuf) - inbuf_len; 350 int amount = sizeof (inbuf) - inbuf_len;
359 351
360 if (!amount) 352 if (!amount)
361 { 353 {
362 // input buffer full 354 // input buffer full
363 socket_ev.poll (socket_ev.poll () & ~PE_R); 355 socket_ev.poll (socket_ev.poll () & ~EV_READ);
364 return; 356 return;
365 } 357 }
366 358
367 amount = read (fd, inbuf + inbuf_len, amount); 359 amount = read (fd, inbuf + inbuf_len, amount);
368 360
… …
383 // should not be here, normally 375 // should not be here, normally
384 } 376 }
385 else 377 else
386 { 378 {
387 inbuf_len += amount; 379 inbuf_len += amount;
388 380 inbuf_handle ();
389 cmd_ev.start ();
390 } 381 }
391 } 382 }
392}
393
394// called whenever we have additional commands to process
395void
396client::cmd_cb (iw &w)
397{
398 if (handle_packet ())
399 w.start ();
400 else
401 flush ();
402} 383}
403 384
404/******************************************************************************* 385/*******************************************************************************
405 * 386 *
406 * Start of write related routines. 387 * Start of write related routines.
… …
462client::send_packet (packet &sl) 443client::send_packet (packet &sl)
463{ 444{
464 if (destroyed ()) 445 if (destroyed ())
465 return; 446 return;
466 447
467 if (sl.length () >= MAXSOCKBUF) 448 if (sl.length () > MAXSOCKBUF)
468 { 449 {
469 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 450 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
470 /* Almost certainly we've overflowed a buffer, so quit now to make 451 /* Almost certainly we've overflowed a buffer, so quit now to make
471 * it easier to debug. 452 * it easier to debug.
472 */ 453 */
… …
510 va_end (ap); 491 va_end (ap);
511 492
512 send_packet (sl); 493 send_packet (sl);
513} 494}
514 495
515// returns true when the message needs special (read: perl) treatment
516static bool
517msg_is_special (const char *msg)
518{
519 return msg [strcspn (msg, "<[&\n")];
520}
521
522void 496void
523client::send_msg (int color, const char *type, const char *msg) 497client::send_msg (int color, const char *type, const char *msg)
524{ 498{
499 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
500 {
501 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
502 return;
503 }
504
505 int len = strlen (msg);
506
507 if (!(color & NDI_VERBATIM)
525 if (msg_is_special (msg)) 508 && (msg_is_special (msg)
509 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
526 cfperl_send_msg (this, color, type, msg); 510 cfperl_send_msg (this, color, type, msg);
527 else if (can_msg)
528 send_packet_printf ("msg %d %s %s", color, type, msg);
529 else if (color < 0)
530 return; // client cannot handle this
531 else 511 else
532 send_packet_printf ("drawinfo %d %s", color, msg); 512 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
533} 513}
534 514
535void 515void
536client::send_drawinfo (const char *msg, int flags) 516client::send_drawinfo (const char *msg, int flags)
537{ 517{
… …
553 *cur++ = ' '; 533 *cur++ = ' ';
554} 534}
555 535
556packet &packet::operator <<(const ber32 v) 536packet &packet::operator <<(const ber32 v)
557{ 537{
558 enum { maxlen = 32 / 7 + 1}; 538 enum { maxlen = 32 / 7 + 1 };
559 uint8 buf[maxlen]; 539 uint8 buf[maxlen];
560 uint8 *p = buf + maxlen; 540 uint8 *p = buf + maxlen;
561 uint32 val = v.val; 541 uint32 val = v.val;
562 542
563 *--p = val & 0x7F; 543 *--p = val & 0x7F;

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