1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT 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 it |
7 | * Crossfire TRT is free software: you can redistribute it and/or modify |
8 | * under the terms of the GNU General Public License as published by the Free |
8 | * it under the terms of the GNU General Public License as published by |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
9 | * the Free Software Foundation, either version 3 of the License, or |
10 | * 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, but |
12 | * This program is distributed in the hope that it will be useful, |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * 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 along |
17 | * You should have received a copy of the GNU General Public License |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
|
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 <crossfire@schmorp.de> |
22 | */ |
21 | */ |
23 | |
22 | |
24 | using namespace std; |
23 | using namespace std; |
… | |
… | |
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 |
|
|
52 | if (!((pticks + fd) & 7)) |
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53 | { |
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54 | // check time of last ack, and, if too old, kill connection |
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55 | struct tcp_info tcpi; |
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|
56 | socklen_t len = sizeof (tcpi); |
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57 | |
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58 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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59 | { |
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60 | if (tcpi.tcpi_snd_mss) |
|
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61 | mss = tcpi.tcpi_snd_mss; |
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62 | |
|
|
63 | rtt = tcpi.tcpi_rtt; |
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64 | rttvar = tcpi.tcpi_rttvar; |
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65 | |
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66 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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67 | { |
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68 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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69 | write_outputbuffer (); |
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70 | |
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71 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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72 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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73 | destroy (); |
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74 | } |
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75 | } |
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76 | } |
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|
77 | #endif |
|
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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 |
… | |
… | |
84 | */ |
51 | */ |
85 | |
52 | |
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) |
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 map1/map1a seem to be the only |
92 | // nop'able commands and they are quite small. |
59 | // nop'able commands and they are quite small. |
93 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
60 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
94 | send_packet (sl); |
61 | send_packet (sl); |
… | |
… | |
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 | |
… | |
… | |
249 | { |
216 | { |
250 | data += 6; |
217 | data += 6; |
251 | len -= 6; |
218 | len -= 6; |
252 | } |
219 | } |
253 | |
220 | |
254 | if (len > 4 && !strncmp (data, "say " , 4)) |
221 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
255 | return true; |
222 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
256 | if (len > 5 && !strncmp (data, "chat ", 5)) |
223 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
257 | return true; |
224 | |
|
|
225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
258 | |
226 | |
259 | return false; |
227 | return false; |
260 | } |
228 | } |
261 | |
229 | |
262 | void |
230 | void |
… | |
… | |
269 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
237 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
270 | else |
238 | else |
271 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
239 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
272 | } |
240 | } |
273 | else |
241 | else |
274 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
242 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
275 | } |
243 | } |
276 | |
244 | |
277 | bool |
245 | bool |
278 | client::handle_packet () |
246 | client::handle_packet () |
279 | { |
247 | { |
… | |
… | |
320 | |
288 | |
321 | goto next_packet; |
289 | goto next_packet; |
322 | } |
290 | } |
323 | |
291 | |
324 | // If we get here, we didn't find a valid command. |
292 | // 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); |
293 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
326 | next_packet: |
294 | next_packet: |
327 | skip_packet (pkt_len); |
295 | skip_packet (pkt_len); |
328 | |
296 | |
329 | // input buffer has space again |
297 | // input buffer has space again |
330 | socket_ev.poll (socket_ev.poll () | PE_R); |
298 | socket_ev.poll (socket_ev.poll () | PE_R); |
… | |
… | |
384 | } |
352 | } |
385 | else |
353 | else |
386 | { |
354 | { |
387 | inbuf_len += amount; |
355 | inbuf_len += amount; |
388 | |
356 | |
389 | cmd_ev.start (); |
|
|
390 | } |
|
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391 | } |
|
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392 | } |
|
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393 | |
|
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394 | // called whenever we have additional commands to process |
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395 | void |
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396 | client::cmd_cb (iw &w) |
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397 | { |
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398 | if (handle_packet ()) |
357 | if (handle_packet ()) |
399 | w.start (); |
358 | { |
400 | else |
359 | while (handle_packet ()) |
401 | 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 | } |
402 | } |
366 | } |
403 | |
367 | |
404 | /******************************************************************************* |
368 | /******************************************************************************* |
405 | * |
369 | * |
406 | * Start of write related routines. |
370 | * Start of write related routines. |
… | |
… | |
462 | client::send_packet (packet &sl) |
426 | client::send_packet (packet &sl) |
463 | { |
427 | { |
464 | if (destroyed ()) |
428 | if (destroyed ()) |
465 | return; |
429 | return; |
466 | |
430 | |
467 | if (sl.length () >= MAXSOCKBUF) |
431 | if (sl.length () > MAXSOCKBUF) |
468 | { |
432 | { |
469 | 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 ()); |
470 | /* 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 |
471 | * it easier to debug. |
435 | * it easier to debug. |
472 | */ |
436 | */ |
… | |
… | |
510 | va_end (ap); |
474 | va_end (ap); |
511 | |
475 | |
512 | send_packet (sl); |
476 | send_packet (sl); |
513 | } |
477 | } |
514 | |
478 | |
515 | void |
479 | // returns true when the message needs special (read: perl) treatment |
516 | client::send_drawinfo (const char *msg, int flags) |
480 | static bool |
517 | { |
481 | msg_is_special (const char *msg) |
518 | send_packet_printf ("drawinfo %d %s", flags, msg); |
482 | { |
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483 | return msg [strcspn (msg, "<[&\n")]; |
519 | } |
484 | } |
520 | |
485 | |
521 | void |
486 | void |
522 | client::send_msg (int color, const char *type, const char *msg) |
487 | client::send_msg (int color, const char *type, const char *msg) |
523 | { |
488 | { |
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489 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
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490 | { |
|
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491 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
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492 | return; |
|
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493 | } |
|
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494 | |
|
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495 | int len = strlen (msg); |
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496 | |
|
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497 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
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498 | cfperl_send_msg (this, color, type, msg); |
524 | if (can_msg) |
499 | else if (can_msg) |
525 | send_packet_printf ("msg %d %s %s", color, type, msg); |
500 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
526 | else if (color < 0) |
501 | else if (color < 0) |
527 | return; // client cannot handle this |
502 | return; // client cannot handle this |
528 | else if (strchr (msg, '<') || strchr (msg, '&')) |
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529 | { |
|
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530 | //TODO: should escape/modify to old syntax |
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531 | send_packet_printf ("drawinfo %d %s", color, msg); |
|
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532 | } |
|
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533 | else |
503 | else |
534 | send_packet_printf ("drawinfo %d %s", color, msg); |
504 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
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505 | } |
|
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506 | |
|
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507 | void |
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508 | client::send_drawinfo (const char *msg, int flags) |
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509 | { |
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510 | send_msg (flags, "log", msg); |
535 | } |
511 | } |
536 | |
512 | |
537 | /*********************************************************************** |
513 | /*********************************************************************** |
538 | * |
514 | * |
539 | * packet functions/utilities |
515 | * packet functions/utilities |