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 |
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37 | #define SOCKET_TIMEOUT 8. |
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38 | |
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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 | |
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49 | #if HAVE_TCP_INFO |
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|
50 | // check time of last ack, and, if too old, kill connection |
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51 | socklen_t len = sizeof (tcpi); |
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52 | |
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53 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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54 | { |
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55 | if (tcpi.tcpi_snd_mss) |
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56 | mss = tcpi.tcpi_snd_mss; |
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57 | |
|
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58 | #if 0 |
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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", |
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60 | tcpi.tcpi_unacked, |
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61 | tcpi.tcpi_sacked, |
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62 | tcpi.tcpi_lost, |
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63 | tcpi.tcpi_retrans, |
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64 | tcpi.tcpi_fackets, |
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65 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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66 | |
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67 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
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68 | #endif |
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69 | |
|
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70 | // do this only when player is active |
|
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71 | if (pl && pl->active |
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72 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
|
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73 | { |
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74 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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75 | write_outputbuffer (); |
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76 | |
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77 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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78 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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79 | destroy (); |
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80 | } |
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81 | } |
|
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82 | #endif |
|
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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. |
… | |
… | |
254 | { |
216 | { |
255 | data += 6; |
217 | data += 6; |
256 | len -= 6; |
218 | len -= 6; |
257 | } |
219 | } |
258 | |
220 | |
259 | if (len > 4 && !strncmp (data, "say " , 4)) |
221 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
260 | return true; |
222 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
261 | if (len > 5 && !strncmp (data, "chat ", 5)) |
223 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
262 | return true; |
224 | |
|
|
225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
263 | |
226 | |
264 | return false; |
227 | return false; |
265 | } |
228 | } |
266 | |
229 | |
267 | void |
230 | void |
… | |
… | |
330 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
293 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
331 | next_packet: |
294 | next_packet: |
332 | skip_packet (pkt_len); |
295 | skip_packet (pkt_len); |
333 | |
296 | |
334 | // input buffer has space again |
297 | // input buffer has space again |
335 | socket_ev.poll (socket_ev.poll () | PE_R); |
298 | socket_ev.poll (socket_ev.poll () | EV_READ); |
336 | |
299 | |
337 | return true; |
300 | return true; |
338 | } |
301 | } |
339 | |
302 | |
340 | // callback called when socket is either readable or writable |
303 | // callback called when socket is either readable or writable |
341 | void |
304 | void |
342 | client::socket_cb (iow &w, int got) |
305 | client::socket_cb (iow &w, int revents) |
343 | { |
306 | { |
344 | //TODO remove when we have better socket cleanup logic |
307 | //TODO remove when we have better socket cleanup logic |
345 | if (destroyed ()) |
308 | if (destroyed ()) |
346 | { |
309 | { |
347 | socket_ev.poll (0); |
310 | socket_ev.poll (0); |
348 | return; |
311 | return; |
349 | } |
312 | } |
350 | |
313 | |
351 | if (got & PE_W) |
314 | if (revents & EV_WRITE) |
352 | { |
315 | { |
353 | write_outputbuffer (); |
316 | write_outputbuffer (); |
354 | |
317 | |
355 | if (!outputbuffer.len) |
318 | if (!outputbuffer.len) |
356 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
319 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
357 | } |
320 | } |
358 | |
321 | |
359 | if (got & PE_R) |
322 | if (revents & EV_READ) |
360 | { |
323 | { |
361 | //TODO: rate-limit tcp connection in better ways, important |
324 | //TODO: rate-limit tcp connection in better ways, important |
362 | |
325 | |
363 | int amount = sizeof (inbuf) - inbuf_len; |
326 | int amount = sizeof (inbuf) - inbuf_len; |
364 | |
327 | |
365 | if (!amount) |
328 | if (!amount) |
366 | { |
329 | { |
367 | // input buffer full |
330 | // input buffer full |
368 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
331 | socket_ev.poll (socket_ev.poll () & ~EV_READ); |
369 | return; |
332 | return; |
370 | } |
333 | } |
371 | |
334 | |
372 | amount = read (fd, inbuf + inbuf_len, amount); |
335 | amount = read (fd, inbuf + inbuf_len, amount); |
373 | |
336 | |
… | |
… | |
389 | } |
352 | } |
390 | else |
353 | else |
391 | { |
354 | { |
392 | inbuf_len += amount; |
355 | inbuf_len += amount; |
393 | |
356 | |
394 | cmd_ev.start (); |
|
|
395 | } |
|
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396 | } |
|
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397 | } |
|
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398 | |
|
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399 | // called whenever we have additional commands to process |
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400 | void |
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401 | client::cmd_cb (iw &w) |
|
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402 | { |
|
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403 | if (handle_packet ()) |
357 | if (handle_packet ()) |
404 | w.start (); |
358 | { |
405 | else |
359 | while (handle_packet ()) |
406 | flush (); |
360 | ; |
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361 | |
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362 | flush (); |
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363 | } |
|
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364 | } |
|
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365 | } |
407 | } |
366 | } |
408 | |
367 | |
409 | /******************************************************************************* |
368 | /******************************************************************************* |
410 | * |
369 | * |
411 | * Start of write related routines. |
370 | * Start of write related routines. |
… | |
… | |
467 | client::send_packet (packet &sl) |
426 | client::send_packet (packet &sl) |
468 | { |
427 | { |
469 | if (destroyed ()) |
428 | if (destroyed ()) |
470 | return; |
429 | return; |
471 | |
430 | |
472 | if (sl.length () >= MAXSOCKBUF) |
431 | if (sl.length () > MAXSOCKBUF) |
473 | { |
432 | { |
474 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
433 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
475 | /* Almost certainly we've overflowed a buffer, so quit now to make |
434 | /* Almost certainly we've overflowed a buffer, so quit now to make |
476 | * it easier to debug. |
435 | * it easier to debug. |
477 | */ |
436 | */ |
… | |
… | |
515 | va_end (ap); |
474 | va_end (ap); |
516 | |
475 | |
517 | send_packet (sl); |
476 | send_packet (sl); |
518 | } |
477 | } |
519 | |
478 | |
520 | // returns true when the message needs special (read: perl) treatment |
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521 | static bool |
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522 | msg_is_special (const char *msg) |
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523 | { |
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524 | return msg [strcspn (msg, "<[&\n")]; |
|
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525 | } |
|
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526 | |
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527 | void |
479 | void |
528 | client::send_msg (int color, const char *type, const char *msg) |
480 | client::send_msg (int color, const char *type, const char *msg) |
529 | { |
481 | { |
530 | if (msg_is_special (msg)) |
482 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
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483 | { |
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484 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
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485 | return; |
|
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486 | } |
|
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487 | |
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488 | int len = strlen (msg); |
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489 | |
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490 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
531 | cfperl_send_msg (this, color, type, msg); |
491 | cfperl_send_msg (this, color, type, msg); |
532 | else if (can_msg) |
492 | else if (can_msg) |
533 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
493 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
534 | else if (color < 0) |
494 | else if (color < 0) |
535 | return; // client cannot handle this |
495 | return; // client cannot handle this |