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 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * |
6 | * |
7 | * Crossfire TRT is free software: you can redistribute it and/or modify |
7 | * Deliantra is free software: you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation, either version 3 of the License, or |
9 | * the Free Software Foundation, either version 3 of the License, or |
10 | * (at your option) any later version. |
10 | * (at your option) any later version. |
11 | * |
11 | * |
12 | * This program is distributed in the hope that it will be useful, |
12 | * This program is distributed in the hope that it will be useful, |
… | |
… | |
15 | * GNU General Public License for more details. |
15 | * GNU General Public License for more details. |
16 | * |
16 | * |
17 | * You should have received a copy of the GNU General Public License |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 | * along with this program. If not, see <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 | |
23 | using namespace std; |
23 | using 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 | |
43 | void |
40 | void |
44 | client::flush () |
41 | client::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 |
… | |
… | |
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 | |
… | |
… | |
213 | {"reply", SC(ReplyCmd) 0 }, |
180 | {"reply", SC(ReplyCmd) 0 }, |
214 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
181 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
215 | {"addme", SC(AddMeCmd) 0 }, |
182 | {"addme", SC(AddMeCmd) 0 }, |
216 | {"askface", SC(AskFaceCmd) 0 }, |
183 | {"askface", SC(AskFaceCmd) 0 }, |
217 | {"requestinfo", SC(RequestInfo) 0 }, |
184 | {"requestinfo", SC(RequestInfo) 0 }, |
218 | {"setfacemode", SC(SetFaceMode) 0 }, |
|
|
219 | {"setsound", SC(SetSound) 0 }, |
185 | {"setsound", SC(SetSound) 0 }, |
220 | {"setup", SC(SetUp) 0 }, |
186 | {"setup", SC(SetUp) 0 }, |
221 | {"version", SC(VersionCmd) 0 }, |
187 | {"version", SC(VersionCmd) 0 }, |
222 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
|
|
223 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
188 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
224 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
|
|
225 | }; |
189 | }; |
226 | |
190 | |
227 | bool |
191 | bool |
228 | client::may_execute (const packet_type *pkt) const |
192 | client::may_execute (const packet_type *pkt) const |
229 | { |
193 | { |
… | |
… | |
249 | { |
213 | { |
250 | data += 6; |
214 | data += 6; |
251 | len -= 6; |
215 | len -= 6; |
252 | } |
216 | } |
253 | |
217 | |
254 | if (len > 4 && !strncmp (data, "say " , 4)) |
218 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
255 | return true; |
219 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
256 | if (len > 5 && !strncmp (data, "chat ", 5)) |
220 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
257 | return true; |
221 | |
|
|
222 | if (len == 7 && !strcmp (data, "suicide")) return true; |
258 | |
223 | |
259 | return false; |
224 | return false; |
260 | } |
225 | } |
261 | |
226 | |
262 | void |
227 | void |
… | |
… | |
269 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
234 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
270 | else |
235 | else |
271 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
236 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
272 | } |
237 | } |
273 | else |
238 | else |
274 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
239 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
275 | } |
240 | } |
276 | |
241 | |
277 | bool |
242 | bool |
278 | client::handle_packet () |
243 | client::handle_packet () |
279 | { |
244 | { |
… | |
… | |
320 | |
285 | |
321 | goto next_packet; |
286 | goto next_packet; |
322 | } |
287 | } |
323 | |
288 | |
324 | // If we get here, we didn't find a valid command. |
289 | // 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); |
290 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
326 | next_packet: |
291 | next_packet: |
327 | skip_packet (pkt_len); |
292 | skip_packet (pkt_len); |
328 | |
293 | |
329 | // input buffer has space again |
294 | // input buffer has space again |
330 | socket_ev.poll (socket_ev.poll () | PE_R); |
295 | socket_ev.poll (socket_ev.poll () | EV_READ); |
331 | |
296 | |
332 | return true; |
297 | return true; |
333 | } |
298 | } |
334 | |
299 | |
335 | // callback called when socket is either readable or writable |
300 | // callback called when socket is either readable or writable |
336 | void |
301 | void |
337 | client::socket_cb (iow &w, int got) |
302 | client::socket_cb (iow &w, int revents) |
338 | { |
303 | { |
339 | //TODO remove when we have better socket cleanup logic |
304 | //TODO remove when we have better socket cleanup logic |
340 | if (destroyed ()) |
305 | if (destroyed ()) |
341 | { |
306 | { |
342 | socket_ev.poll (0); |
307 | socket_ev.poll (0); |
343 | return; |
308 | return; |
344 | } |
309 | } |
345 | |
310 | |
346 | if (got & PE_W) |
311 | if (revents & EV_WRITE) |
347 | { |
312 | { |
348 | write_outputbuffer (); |
313 | write_outputbuffer (); |
349 | |
314 | |
350 | if (!outputbuffer.len) |
315 | if (!outputbuffer.len) |
351 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
316 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
352 | } |
317 | } |
353 | |
318 | |
354 | if (got & PE_R) |
319 | if (revents & EV_READ) |
355 | { |
320 | { |
356 | //TODO: rate-limit tcp connection in better ways, important |
321 | //TODO: rate-limit tcp connection in better ways, important |
357 | |
322 | |
358 | int amount = sizeof (inbuf) - inbuf_len; |
323 | int amount = sizeof (inbuf) - inbuf_len; |
359 | |
324 | |
360 | if (!amount) |
325 | if (!amount) |
361 | { |
326 | { |
362 | // input buffer full |
327 | // input buffer full |
363 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
328 | socket_ev.poll (socket_ev.poll () & ~EV_READ); |
364 | return; |
329 | return; |
365 | } |
330 | } |
366 | |
331 | |
367 | amount = read (fd, inbuf + inbuf_len, amount); |
332 | amount = read (fd, inbuf + inbuf_len, amount); |
368 | |
333 | |
… | |
… | |
384 | } |
349 | } |
385 | else |
350 | else |
386 | { |
351 | { |
387 | inbuf_len += amount; |
352 | inbuf_len += amount; |
388 | |
353 | |
389 | cmd_ev.start (); |
|
|
390 | } |
|
|
391 | } |
|
|
392 | } |
|
|
393 | |
|
|
394 | // called whenever we have additional commands to process |
|
|
395 | void |
|
|
396 | client::cmd_cb (iw &w) |
|
|
397 | { |
|
|
398 | if (handle_packet ()) |
354 | if (handle_packet ()) |
399 | w.start (); |
355 | { |
400 | else |
356 | while (handle_packet ()) |
401 | flush (); |
357 | ; |
|
|
358 | |
|
|
359 | flush (); |
|
|
360 | } |
|
|
361 | } |
|
|
362 | } |
402 | } |
363 | } |
403 | |
364 | |
404 | /******************************************************************************* |
365 | /******************************************************************************* |
405 | * |
366 | * |
406 | * Start of write related routines. |
367 | * Start of write related routines. |
… | |
… | |
462 | client::send_packet (packet &sl) |
423 | client::send_packet (packet &sl) |
463 | { |
424 | { |
464 | if (destroyed ()) |
425 | if (destroyed ()) |
465 | return; |
426 | return; |
466 | |
427 | |
467 | if (sl.length () >= MAXSOCKBUF) |
428 | if (sl.length () > MAXSOCKBUF) |
468 | { |
429 | { |
469 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
430 | 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 |
431 | /* Almost certainly we've overflowed a buffer, so quit now to make |
471 | * it easier to debug. |
432 | * it easier to debug. |
472 | */ |
433 | */ |
… | |
… | |
510 | va_end (ap); |
471 | va_end (ap); |
511 | |
472 | |
512 | send_packet (sl); |
473 | send_packet (sl); |
513 | } |
474 | } |
514 | |
475 | |
515 | // returns true when the message needs special (read: perl) treatment |
|
|
516 | static bool |
|
|
517 | msg_is_special (const char *msg) |
|
|
518 | { |
|
|
519 | return msg [strcspn (msg, "<[&\n")]; |
|
|
520 | } |
|
|
521 | |
|
|
522 | void |
476 | void |
523 | client::send_msg (int color, const char *type, const char *msg) |
477 | client::send_msg (int color, const char *type, const char *msg) |
524 | { |
478 | { |
|
|
479 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
480 | { |
|
|
481 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
482 | return; |
|
|
483 | } |
|
|
484 | |
|
|
485 | int len = strlen (msg); |
|
|
486 | |
|
|
487 | if (!(color & NDI_VERBATIM) |
525 | if (msg_is_special (msg)) |
488 | && (msg_is_special (msg) |
|
|
489 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
526 | cfperl_send_msg (this, color, type, msg); |
490 | 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 |
491 | else |
532 | send_packet_printf ("drawinfo %d %s", color, msg); |
492 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
533 | } |
493 | } |
534 | |
494 | |
535 | void |
495 | void |
536 | client::send_drawinfo (const char *msg, int flags) |
496 | client::send_drawinfo (const char *msg, int flags) |
537 | { |
497 | { |