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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.59 by root, Sun Sep 30 20:22:25 2007 UTC vs.
Revision 1.87 by root, Tue Nov 6 03:45:17 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>
… …
53 // 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.
54 if (!outputbuffer.len) 54 if (!outputbuffer.len)
55 { 55 {
56 if (last_send + IDLE_PING <= NOW && pl && pl->active) 56 if (last_send + IDLE_PING <= NOW && pl && pl->active)
57 { 57 {
58 // 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
59 // nop'able commands and they are quite small. 59 // nop'able command and it is quite small.
60 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 60 packet sl ("map1a");
61 send_packet (sl); 61 send_packet (sl);
62 } 62 }
63 else 63 else
64 return; 64 return;
65 } 65 }
66 66
67 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
68 return; 68 return;
69 69
70 last_send = NOW; 70 last_send = NOW;
71 write_outputbuffer (); 71 write_outputbuffer ();
72} 72}
… …
99 // just retry 99 // just retry
100 } 100 }
101 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
102 { 102 {
103 // delay till ready 103 // delay till ready
104 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
105 socket_ev.start (); 105 socket_ev.start ();
106 return; 106 return;
107 } 107 }
108 else 108 else
109 { 109 {
… …
111 destroy (); 111 destroy ();
112 return; 112 return;
113 } 113 }
114 } 114 }
115 115
116 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
117} 117}
118 118
119/****************************************************************************** 119/******************************************************************************
120 * 120 *
121 * Start of read routines. 121 * Start of read routines.
… …
156 ****************************************************************************/ 156 ****************************************************************************/
157 157
158// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
160#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}
161 167
162/** 168/**
163 * Dispatch table for the server. 169 * Dispatch table for the server.
164 */ 170 */
165static struct packet_type packets[] = { 171static struct packet_type packets[] = {
… …
171 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
172 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
173 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
174 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
175 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
176 {"ext", PC(ExtCmd) 0 }, // CF+ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
177 {"mapredraw", PC(MapRedrawCmd) 0 }, 183 {"mapredraw", PC(MapRedrawCmd) 0 },
178 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
179 185
180 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
181 {"exti", SC(ExtiCmd) 0 }, // CF+ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
182 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
183 {"askface", SC(AskFaceCmd) 0 }, 189 {"askface", SC(AskFaceCmd) 0 },
184 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
185 {"setfacemode", SC(SetFaceMode) 0 },
186 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
187 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
188 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
189 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
190 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
191 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
192}; 196};
193 197
194bool 198bool
195client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
196{ 200{
… …
216 { 220 {
217 data += 6; 221 data += 6;
218 len -= 6; 222 len -= 6;
219 } 223 }
220 224
221 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
222 return true; 226 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
223 if (len > 5 && !strncmp (data, "chat ", 5)) 227 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
224 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;
225 232
226 return false; 233 return false;
227} 234}
228 235
229void 236void
… …
231{ 238{
232 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
233 { 240 {
234 //TODO: only one format 241 //TODO: only one format
235 if (pkt->flags & PF_PLAYER) 242 if (pkt->flags & PF_PLAYER)
243 {
236 ((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 }
237 else 247 else
238 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
239 } 249 }
240 else 250 else
241 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); 251 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
… …
254 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
255 destroy (); 265 destroy ();
256 return false; 266 return false;
257 } 267 }
258 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
259 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
260 271
261 /* First, break out beginning word. There are at least 272 /* First, break out beginning word. There are at least
262 * a few commands that do not have any paremeters. If 273 * a few commands that do not have any paremeters. If
263 * we get such a command, don't worry about trying 274 * we get such a command, don't worry about trying
264 * to break it up. 275 * to break it up.
… …
275 { 286 {
276 data = (char *)inbuf + 2; // better read garbage than segfault 287 data = (char *)inbuf + 2; // better read garbage than segfault
277 datalen = 0; 288 datalen = 0;
278 } 289 }
279 290
280 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)
281 if (!strcmp ((char *)inbuf + 2, pkt->name)) 292 if (!strcmp ((char *)inbuf + 2, pkt->name))
282 { 293 {
283 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
284 queue_command (pkt, data, datalen); 295 queue_command (pkt, data, datalen);
285 else 296 else
… …
288 goto next_packet; 299 goto next_packet;
289 } 300 }
290 301
291 // If we get here, we didn't find a valid command. 302 // If we get here, we didn't find a valid command.
292 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); 303 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
304
293next_packet: 305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
294 skip_packet (pkt_len); 307 skip_packet (pkt_len);
295 308
296 // input buffer has space again 309 // input buffer has space again
297 socket_ev.poll (socket_ev.poll () | PE_R); 310 socket_ev.poll (socket_ev.poll () | EV_READ);
298 311
299 return true; 312 return true;
300} 313}
301 314
315void
316client::inbuf_handle ()
317{
318 if (!handle_packet ())
319 return;
320
321 while (handle_packet ())
322 ;
323
324 flush ();
325}
326
302// callback called when socket is either readable or writable 327// callback called when socket is either readable or writable
303void 328void
304client::socket_cb (iow &w, int got) 329client::socket_cb (iow &w, int revents)
305{ 330{
306 //TODO remove when we have better socket cleanup logic 331 //TODO remove when we have better socket cleanup logic
307 if (destroyed ()) 332 if (destroyed ())
308 { 333 {
309 socket_ev.poll (0); 334 socket_ev.poll (0);
310 return; 335 return;
311 } 336 }
312 337
313 if (got & PE_W) 338 if (revents & EV_WRITE)
314 { 339 {
315 write_outputbuffer (); 340 write_outputbuffer ();
316 341
317 if (!outputbuffer.len) 342 if (!outputbuffer.len)
318 socket_ev.poll (socket_ev.poll () & ~PE_W); 343 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
319 } 344 }
320 345
321 if (got & PE_R) 346 if (revents & EV_READ)
322 { 347 {
323 //TODO: rate-limit tcp connection in better ways, important 348 //TODO: rate-limit tcp connection in better ways, important
324 349
325 int amount = sizeof (inbuf) - inbuf_len; 350 int amount = sizeof (inbuf) - inbuf_len;
326 351
327 if (!amount) 352 if (!amount)
328 { 353 {
329 // input buffer full 354 // input buffer full
330 socket_ev.poll (socket_ev.poll () & ~PE_R); 355 LOG (llevError, "input buffer overflow.");
356 destroy ();
331 return; 357 return;
332 } 358 }
333 359
360 if (ws_version)
361 {
362 if (ws_inbuf_len + 4096 > ws_inbuf_alloc)
363 ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096);
364
365 int len = read (fd, ws_inbuf + ws_inbuf_len, ws_inbuf_alloc - ws_inbuf_len);
366
367 if (len > 0)
368 {
369 ws_inbuf_len += len;
370
371 if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask
372 return;
373
374 int d = 2;
375 int o = ws_inbuf [0] & 15;
376 int l = ws_inbuf [1] & 127;
377
378 if (l == 126)
379 {
380 l = (ws_inbuf [2] << 8) | ws_inbuf [3];
381 d += 2;
382 }
383 else if (l == 127)
384 {
385 if (ws_inbuf_len < 2 + 8)
386 return;
387
388 // we don't do extra long frames, if a browser wants to send >2**32 bytes,
389 // there are bigger issues to fix.
390 l = (ws_inbuf [6] << 24)
391 | (ws_inbuf [7] << 16)
392 | (ws_inbuf [8] << 8)
393 | ws_inbuf [9];
394 d += 8;
395 }
396
397 // we only continue if we have a complete frame
398 if (ws_inbuf_len < d + 4 + l)
399 return;
400
401 switch (o)
402 {
403 case 0: o = ws_inbuf_type; break; // continuation
404 case 1: ws_inbuf_type = 1; break; // utf-8
405 case 2: ws_inbuf_type = 2; break; // binary
406 }
407
408 if (l > amount)
409 {
410 // input buffer full
411 LOG (llevError, "input buffer overflow (ws).");
412 destroy ();
413 return;
414 }
415
416 for (int i = 0; i < l; ++i)
417 inbuf [inbuf_len + i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)];
418
419 // remove frame
420 ws_inbuf_len -= d + 4 + l;
421 memmove (ws_inbuf, ws_inbuf + d + 4 + l, ws_inbuf_len);
422
423 switch (o)
424 {
425 case 1: // utf-8
426 //TODO
427 break;
428 case 2: // binary
429 break;
430
431 case 9: // ping
432 {
433 // send pong - we assume ping messages are <64k
434 // as we can't handle >10k at the moment anyway.
435 uint8 hdr [] = { 0x8a, 126, l >> 8, l };
436 send (hdr, sizeof (hdr));
437 send (inbuf + inbuf_len, l);
438 }
439 return;
440
441 case 10: // pong
442 return;
443
444 case 8: // close
445 default:
446 destroy ();
447 return;
448 }
449
450 amount = l;
451 }
452 else
453 amount = -1;
454 }
455 else
334 amount = read (fd, inbuf + inbuf_len, amount); 456 amount = read (fd, inbuf + inbuf_len, amount);
335 457
336 if (!amount) 458 if (!amount)
337 { 459 {
338 destroy (); 460 destroy ();
339 return; 461 return;
… …
350 // should not be here, normally 472 // should not be here, normally
351 } 473 }
352 else 474 else
353 { 475 {
354 inbuf_len += amount; 476 inbuf_len += amount;
355 477 inbuf_handle ();
356 cmd_ev.start ();
357 } 478 }
358 } 479 }
359}
360
361// called whenever we have additional commands to process
362void
363client::cmd_cb (iw &w)
364{
365 if (handle_packet ())
366 w.start ();
367 else
368 flush ();
369} 480}
370 481
371/******************************************************************************* 482/*******************************************************************************
372 * 483 *
373 * Start of write related routines. 484 * Start of write related routines.
… …
441 } 552 }
442 553
443 if (!sl.length ()) 554 if (!sl.length ())
444 return; 555 return;
445 556
557 if (ws_version == 8)
558 {
559 uint8 hdr [4] = { 0x81, 126, sl.length () >> 8, sl.length () };
560 // TODO: utf-8 encoding
561 send (hdr, 4);
562 send (sl.buf_ + sl.hdrlen, sl.cur - sl.buf_ - sl.hdrlen);
563 }
564 else if (ws_version == 13)
565 {
566 uint8 hdr [4] = { 0x82, 126, sl.length () >> 8, sl.length () };
567 send (hdr, 4);
568 send (sl.buf_ + sl.hdrlen, sl.cur - sl.buf_ - sl.hdrlen);
569 }
570 else
571 {
446 assert (sl.hdrlen == 2); 572 assert (sl.hdrlen == 2);
447 573
448 sl.buf_ [0] = sl.length () >> 8; 574 sl.buf_ [0] = sl.length () >> 8;
449 sl.buf_ [1] = sl.length () ; 575 sl.buf_ [1] = sl.length () ;
450 576
451 send (sl.buf_, sl.length () + sl.hdrlen); 577 send (sl.buf_, sl.length () + sl.hdrlen);
578 }
452} 579}
453 580
454void 581void
455client::send_packet (const char *buf, int len) 582client::send_packet (const char *buf, int len)
456{ 583{
… …
477 va_end (ap); 604 va_end (ap);
478 605
479 send_packet (sl); 606 send_packet (sl);
480} 607}
481 608
482// returns true when the message needs special (read: perl) treatment
483static bool
484msg_is_special (const char *msg)
485{
486 return msg [strcspn (msg, "<[&\n")];
487}
488
489void 609void
490client::send_msg (int color, const char *type, const char *msg) 610client::send_msg (int color, const char *type, const char *msg)
491{ 611{
492 if (!msg || !type) // it can happen (for example, missing attack messages cause this) 612 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
493 { 613 {
… …
495 return; 615 return;
496 } 616 }
497 617
498 int len = strlen (msg); 618 int len = strlen (msg);
499 619
620 if (!(color & NDI_VERBATIM)
621 && (msg_is_special (msg)
500 if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) 622 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
501 cfperl_send_msg (this, color, type, msg); 623 cfperl_send_msg (this, color, type, msg);
502 else if (can_msg) 624 else
503 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 625 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
504 else if (color < 0)
505 return; // client cannot handle this
506 else
507 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
508} 626}
509 627
510void 628void
511client::send_drawinfo (const char *msg, int flags) 629client::send_drawinfo (const char *msg, int flags)
512{ 630{
… …
528 *cur++ = ' '; 646 *cur++ = ' ';
529} 647}
530 648
531packet &packet::operator <<(const ber32 v) 649packet &packet::operator <<(const ber32 v)
532{ 650{
533 enum { maxlen = 32 / 7 + 1}; 651 enum { maxlen = 32 / 7 + 1 };
534 uint8 buf[maxlen]; 652 uint8 buf[maxlen];
535 uint8 *p = buf + maxlen; 653 uint8 *p = buf + maxlen;
536 uint32 val = v.val; 654 uint32 val = v.val;
537 655
538 *--p = val & 0x7F; 656 *--p = val & 0x7F;

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