1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
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 |
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6 | * |
5 | * |
7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
8 | * under the terms of the GNU General Public License as published by the Free |
7 | * the terms of the Affero GNU General Public License as published by the |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
10 | * any later version. |
9 | * option) any later version. |
11 | * |
10 | * |
12 | * This program is distributed in the hope that it will be useful, but |
11 | * This program is distributed in the hope that it will be useful, |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * 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 along |
16 | * You should have received a copy of the Affero GNU General Public License |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
17 | * and the GNU General Public License along with this program. If not, see |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | * <http://www.gnu.org/licenses/>. |
20 | * |
19 | * |
21 | * 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> |
22 | */ |
21 | */ |
23 | |
22 | |
24 | using namespace std; |
23 | using namespace std; |
25 | |
24 | |
26 | #include <global.h> |
25 | #include <global.h> |
… | |
… | |
32 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
33 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
34 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
35 | #endif |
34 | #endif |
36 | |
35 | |
37 | // disconnect a socket after this many seconds without an ack |
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38 | #define SOCKET_TIMEOUT 8. |
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39 | |
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40 | // force a packet when idle for more than this many seconds, |
36 | // force a packet when idle for more than this many seconds, |
41 | // forcing an ack regularly. |
37 | // forcing an ack regularly. |
42 | #define IDLE_PING 2. |
38 | #define IDLE_PING 2. |
43 | |
39 | |
44 | void |
40 | void |
45 | client::flush () |
41 | client::flush () |
46 | { |
42 | { |
47 | if (destroyed ()) |
43 | if (destroyed ()) |
48 | return; |
44 | return; |
49 | |
|
|
50 | #if HAVE_TCP_INFO |
|
|
51 | // check about once per second, spread evenly over all clients |
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52 | // do this only when player is active |
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53 | if (!((pticks + fd) & 7) && pl && pl->active) |
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54 | { |
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55 | // check time of last ack, and, if too old, kill connection |
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56 | struct tcp_info tcpi; |
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|
57 | socklen_t len = sizeof (tcpi); |
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58 | |
|
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59 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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60 | { |
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61 | if (tcpi.tcpi_snd_mss) |
|
|
62 | mss = tcpi.tcpi_snd_mss; |
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63 | |
|
|
64 | rtt = tcpi.tcpi_rtt; |
|
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65 | rttvar = tcpi.tcpi_rttvar; |
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66 | |
|
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67 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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68 | { |
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69 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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70 | write_outputbuffer (); |
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71 | |
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72 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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73 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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74 | destroy (); |
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75 | } |
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76 | } |
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77 | } |
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|
78 | #endif |
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79 | |
45 | |
80 | /** |
46 | /** |
81 | * Writes data to socket. |
47 | * Writes data to socket. |
82 | * |
48 | * |
83 | * 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 |
… | |
… | |
96 | } |
62 | } |
97 | else |
63 | else |
98 | return; |
64 | return; |
99 | } |
65 | } |
100 | |
66 | |
101 | if (socket_ev.poll () & PE_W) |
67 | if (socket_ev.poll () & EV_WRITE) |
102 | return; |
68 | return; |
103 | |
69 | |
104 | last_send = NOW; |
70 | last_send = NOW; |
105 | write_outputbuffer (); |
71 | write_outputbuffer (); |
106 | } |
72 | } |
… | |
… | |
133 | // just retry |
99 | // just retry |
134 | } |
100 | } |
135 | else if (errno == EAGAIN) |
101 | else if (errno == EAGAIN) |
136 | { |
102 | { |
137 | // delay till ready |
103 | // delay till ready |
138 | socket_ev.poll (socket_ev.poll () | PE_W); |
104 | socket_ev.poll (socket_ev.poll () | EV_WRITE); |
139 | socket_ev.start (); |
105 | socket_ev.start (); |
140 | return; |
106 | return; |
141 | } |
107 | } |
142 | else |
108 | else |
143 | { |
109 | { |
… | |
… | |
145 | destroy (); |
111 | destroy (); |
146 | return; |
112 | return; |
147 | } |
113 | } |
148 | } |
114 | } |
149 | |
115 | |
150 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
116 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
151 | } |
117 | } |
152 | |
118 | |
153 | /****************************************************************************** |
119 | /****************************************************************************** |
154 | * |
120 | * |
155 | * Start of read routines. |
121 | * Start of read routines. |
… | |
… | |
166 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
167 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
168 | |
134 | |
169 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
170 | { |
136 | { |
171 | 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); |
172 | destroy (); |
138 | destroy (); |
173 | return -1; |
139 | return -1; |
174 | } |
140 | } |
175 | } |
141 | } |
176 | |
142 | |
… | |
… | |
214 | {"reply", SC(ReplyCmd) 0 }, |
180 | {"reply", SC(ReplyCmd) 0 }, |
215 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
181 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
216 | {"addme", SC(AddMeCmd) 0 }, |
182 | {"addme", SC(AddMeCmd) 0 }, |
217 | {"askface", SC(AskFaceCmd) 0 }, |
183 | {"askface", SC(AskFaceCmd) 0 }, |
218 | {"requestinfo", SC(RequestInfo) 0 }, |
184 | {"requestinfo", SC(RequestInfo) 0 }, |
219 | {"setfacemode", SC(SetFaceMode) 0 }, |
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|
220 | {"setsound", SC(SetSound) 0 }, |
185 | {"setsound", SC(SetSound) 0 }, |
221 | {"setup", SC(SetUp) 0 }, |
186 | {"setup", SC(SetUp) 0 }, |
222 | {"version", SC(VersionCmd) 0 }, |
187 | {"version", SC(VersionCmd) 0 }, |
223 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
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|
224 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
188 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
225 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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|
226 | }; |
189 | }; |
227 | |
190 | |
228 | bool |
191 | bool |
229 | client::may_execute (const packet_type *pkt) const |
192 | client::may_execute (const packet_type *pkt) const |
230 | { |
193 | { |
… | |
… | |
250 | { |
213 | { |
251 | data += 6; |
214 | data += 6; |
252 | len -= 6; |
215 | len -= 6; |
253 | } |
216 | } |
254 | |
217 | |
255 | if (len > 4 && !strncmp (data, "say " , 4)) |
218 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
256 | return true; |
219 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
257 | if (len > 5 && !strncmp (data, "chat ", 5)) |
220 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
258 | return true; |
221 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
|
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222 | if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
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223 | |
|
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224 | if (len == 7 && !strcmp (data, "suicide")) return true; |
259 | |
225 | |
260 | return false; |
226 | return false; |
261 | } |
227 | } |
262 | |
228 | |
263 | void |
229 | void |
… | |
… | |
265 | { |
231 | { |
266 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
232 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
267 | { |
233 | { |
268 | //TODO: only one format |
234 | //TODO: only one format |
269 | if (pkt->flags & PF_PLAYER) |
235 | if (pkt->flags & PF_PLAYER) |
|
|
236 | { |
270 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
237 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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238 | pl->need_updated_stats (); |
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239 | } |
271 | else |
240 | else |
272 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
241 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
273 | } |
242 | } |
274 | else |
243 | else |
275 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
244 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
276 | } |
245 | } |
277 | |
246 | |
278 | bool |
247 | bool |
279 | client::handle_packet () |
248 | client::handle_packet () |
280 | { |
249 | { |
… | |
… | |
288 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
257 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
289 | destroy (); |
258 | destroy (); |
290 | return false; |
259 | return false; |
291 | } |
260 | } |
292 | |
261 | |
|
|
262 | uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
293 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
263 | inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
294 | |
264 | |
295 | /* First, break out beginning word. There are at least |
265 | /* First, break out beginning word. There are at least |
296 | * a few commands that do not have any paremeters. If |
266 | * a few commands that do not have any paremeters. If |
297 | * we get such a command, don't worry about trying |
267 | * we get such a command, don't worry about trying |
298 | * to break it up. |
268 | * to break it up. |
… | |
… | |
321 | |
291 | |
322 | goto next_packet; |
292 | goto next_packet; |
323 | } |
293 | } |
324 | |
294 | |
325 | // If we get here, we didn't find a valid command. |
295 | // If we get here, we didn't find a valid command. |
326 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
296 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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297 | |
327 | next_packet: |
298 | next_packet: |
|
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299 | inbuf [pkt_len] = save_byte; // rather ugly |
328 | skip_packet (pkt_len); |
300 | skip_packet (pkt_len); |
329 | |
301 | |
330 | // input buffer has space again |
302 | // input buffer has space again |
331 | socket_ev.poll (socket_ev.poll () | PE_R); |
303 | socket_ev.poll (socket_ev.poll () | EV_READ); |
332 | |
304 | |
333 | return true; |
305 | return true; |
334 | } |
306 | } |
335 | |
307 | |
336 | // callback called when socket is either readable or writable |
308 | // callback called when socket is either readable or writable |
337 | void |
309 | void |
338 | client::socket_cb (iow &w, int got) |
310 | client::socket_cb (iow &w, int revents) |
339 | { |
311 | { |
340 | //TODO remove when we have better socket cleanup logic |
312 | //TODO remove when we have better socket cleanup logic |
341 | if (destroyed ()) |
313 | if (destroyed ()) |
342 | { |
314 | { |
343 | socket_ev.poll (0); |
315 | socket_ev.poll (0); |
344 | return; |
316 | return; |
345 | } |
317 | } |
346 | |
318 | |
347 | if (got & PE_W) |
319 | if (revents & EV_WRITE) |
348 | { |
320 | { |
349 | write_outputbuffer (); |
321 | write_outputbuffer (); |
350 | |
322 | |
351 | if (!outputbuffer.len) |
323 | if (!outputbuffer.len) |
352 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
324 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
353 | } |
325 | } |
354 | |
326 | |
355 | if (got & PE_R) |
327 | if (revents & EV_READ) |
356 | { |
328 | { |
357 | //TODO: rate-limit tcp connection in better ways, important |
329 | //TODO: rate-limit tcp connection in better ways, important |
358 | |
330 | |
359 | int amount = sizeof (inbuf) - inbuf_len; |
331 | int amount = sizeof (inbuf) - inbuf_len; |
360 | |
332 | |
361 | if (!amount) |
333 | if (!amount) |
362 | { |
334 | { |
363 | // input buffer full |
335 | // input buffer full |
364 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
336 | socket_ev.poll (socket_ev.poll () & ~EV_READ); |
365 | return; |
337 | return; |
366 | } |
338 | } |
367 | |
339 | |
368 | amount = read (fd, inbuf + inbuf_len, amount); |
340 | amount = read (fd, inbuf + inbuf_len, amount); |
369 | |
341 | |
… | |
… | |
385 | } |
357 | } |
386 | else |
358 | else |
387 | { |
359 | { |
388 | inbuf_len += amount; |
360 | inbuf_len += amount; |
389 | |
361 | |
390 | cmd_ev.start (); |
|
|
391 | } |
|
|
392 | } |
|
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393 | } |
|
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394 | |
|
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395 | // called whenever we have additional commands to process |
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396 | void |
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397 | client::cmd_cb (iw &w) |
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398 | { |
|
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399 | if (handle_packet ()) |
362 | if (handle_packet ()) |
400 | w.start (); |
363 | { |
401 | else |
364 | while (handle_packet ()) |
402 | flush (); |
365 | ; |
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366 | |
|
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367 | flush (); |
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368 | } |
|
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369 | } |
|
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370 | } |
403 | } |
371 | } |
404 | |
372 | |
405 | /******************************************************************************* |
373 | /******************************************************************************* |
406 | * |
374 | * |
407 | * Start of write related routines. |
375 | * Start of write related routines. |
… | |
… | |
463 | client::send_packet (packet &sl) |
431 | client::send_packet (packet &sl) |
464 | { |
432 | { |
465 | if (destroyed ()) |
433 | if (destroyed ()) |
466 | return; |
434 | return; |
467 | |
435 | |
468 | if (sl.length () >= MAXSOCKBUF) |
436 | if (sl.length () > MAXSOCKBUF) |
469 | { |
437 | { |
470 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
438 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
471 | /* Almost certainly we've overflowed a buffer, so quit now to make |
439 | /* Almost certainly we've overflowed a buffer, so quit now to make |
472 | * it easier to debug. |
440 | * it easier to debug. |
473 | */ |
441 | */ |
… | |
… | |
511 | va_end (ap); |
479 | va_end (ap); |
512 | |
480 | |
513 | send_packet (sl); |
481 | send_packet (sl); |
514 | } |
482 | } |
515 | |
483 | |
516 | // returns true when the message needs special (read: perl) treatment |
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517 | static bool |
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518 | msg_is_special (const char *msg) |
|
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519 | { |
|
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520 | return msg [strcspn (msg, "<[&\n")]; |
|
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521 | } |
|
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522 | |
|
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523 | void |
484 | void |
524 | client::send_msg (int color, const char *type, const char *msg) |
485 | client::send_msg (int color, const char *type, const char *msg) |
525 | { |
486 | { |
|
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487 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
488 | { |
|
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489 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
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490 | return; |
|
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491 | } |
|
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492 | |
|
|
493 | int len = strlen (msg); |
|
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494 | |
|
|
495 | if (!(color & NDI_VERBATIM) |
526 | if (msg_is_special (msg)) |
496 | && (msg_is_special (msg) |
|
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497 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
527 | cfperl_send_msg (this, color, type, msg); |
498 | cfperl_send_msg (this, color, type, msg); |
528 | else if (can_msg) |
|
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529 | send_packet_printf ("msg %d %s %s", color, type, msg); |
|
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530 | else if (color < 0) |
|
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531 | return; // client cannot handle this |
|
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532 | else |
499 | else |
533 | send_packet_printf ("drawinfo %d %s", color, msg); |
500 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
534 | } |
501 | } |
535 | |
502 | |
536 | void |
503 | void |
537 | client::send_drawinfo (const char *msg, int flags) |
504 | client::send_drawinfo (const char *msg, int flags) |
538 | { |
505 | { |