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 |
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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 | |
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50 | #if HAVE_TCP_INFO |
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51 | // check about once per second, spread evenly over all clients |
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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 | rtt = tcpi.tcpi_rtt; |
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61 | rttvar = tcpi.tcpi_rttvar; |
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62 | |
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63 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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64 | { |
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65 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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66 | write_outputbuffer (); |
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67 | |
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68 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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69 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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70 | destroy (); |
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71 | } |
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72 | } |
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73 | } |
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74 | #endif |
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75 | |
45 | |
76 | /** |
46 | /** |
77 | * Writes data to socket. |
47 | * Writes data to socket. |
78 | * |
48 | * |
79 | * 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 |
… | |
… | |
81 | */ |
51 | */ |
82 | |
52 | |
83 | // 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. |
84 | if (!outputbuffer.len) |
54 | if (!outputbuffer.len) |
85 | { |
55 | { |
86 | if (last_send + IDLE_PING <= NOW) |
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
87 | { |
57 | { |
88 | // 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 |
89 | // nop'able commands and they are quite small. |
59 | // nop'able commands and they are quite small. |
90 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
60 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
91 | send_packet (sl); |
61 | send_packet (sl); |
… | |
… | |
162 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
163 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
164 | |
134 | |
165 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
166 | { |
136 | { |
167 | 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); |
168 | destroy (); |
138 | destroy (); |
169 | return -1; |
139 | return -1; |
170 | } |
140 | } |
171 | } |
141 | } |
172 | |
142 | |
… | |
… | |
266 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
236 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
267 | else |
237 | else |
268 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
238 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
269 | } |
239 | } |
270 | else |
240 | else |
271 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
241 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
272 | } |
242 | } |
273 | |
243 | |
274 | bool |
244 | bool |
275 | client::handle_packet () |
245 | client::handle_packet () |
276 | { |
246 | { |
… | |
… | |
317 | |
287 | |
318 | goto next_packet; |
288 | goto next_packet; |
319 | } |
289 | } |
320 | |
290 | |
321 | // If we get here, we didn't find a valid command. |
291 | // If we get here, we didn't find a valid command. |
322 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
292 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
323 | next_packet: |
293 | next_packet: |
324 | skip_packet (pkt_len); |
294 | skip_packet (pkt_len); |
325 | |
295 | |
326 | // input buffer has space again |
296 | // input buffer has space again |
327 | socket_ev.poll (socket_ev.poll () | PE_R); |
297 | socket_ev.poll (socket_ev.poll () | PE_R); |
… | |
… | |
459 | client::send_packet (packet &sl) |
429 | client::send_packet (packet &sl) |
460 | { |
430 | { |
461 | if (destroyed ()) |
431 | if (destroyed ()) |
462 | return; |
432 | return; |
463 | |
433 | |
464 | if (sl.length () >= MAXSOCKBUF) |
434 | if (sl.length () > MAXSOCKBUF) |
465 | { |
435 | { |
466 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
436 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
467 | /* Almost certainly we've overflowed a buffer, so quit now to make |
437 | /* Almost certainly we've overflowed a buffer, so quit now to make |
468 | * it easier to debug. |
438 | * it easier to debug. |
469 | */ |
439 | */ |
… | |
… | |
507 | va_end (ap); |
477 | va_end (ap); |
508 | |
478 | |
509 | send_packet (sl); |
479 | send_packet (sl); |
510 | } |
480 | } |
511 | |
481 | |
512 | void |
482 | // returns true when the message needs special (read: perl) treatment |
513 | client::send_drawinfo (const char *msg, int flags) |
483 | static bool |
514 | { |
484 | msg_is_special (const char *msg) |
515 | send_packet_printf ("drawinfo %d %s", flags, msg); |
485 | { |
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486 | return msg [strcspn (msg, "<[&\n")]; |
516 | } |
487 | } |
517 | |
488 | |
518 | void |
489 | void |
519 | client::send_msg (int color, const char *type, const char *msg) |
490 | client::send_msg (int color, const char *type, const char *msg) |
520 | { |
491 | { |
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492 | if (msg_is_special (msg)) |
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493 | cfperl_send_msg (this, color, type, msg); |
521 | if (can_msg) |
494 | else if (can_msg) |
522 | send_packet_printf ("msg %d %s %s", color, type, msg); |
495 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
523 | else if (color < 0) |
496 | else if (color < 0) |
524 | return; // client cannot handle this |
497 | return; // client cannot handle this |
525 | else if (strchr (msg, '<') || strchr (msg, '&')) |
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526 | { |
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527 | //TODO: should escape/modify to old syntax |
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528 | send_packet_printf ("drawinfo %d %s", color, msg); |
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529 | } |
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530 | else |
498 | else |
531 | send_packet_printf ("drawinfo %d %s", color, msg); |
499 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
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500 | } |
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501 | |
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502 | void |
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503 | client::send_drawinfo (const char *msg, int flags) |
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504 | { |
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505 | send_msg (flags, "log", msg); |
532 | } |
506 | } |
533 | |
507 | |
534 | /*********************************************************************** |
508 | /*********************************************************************** |
535 | * |
509 | * |
536 | * packet functions/utilities |
510 | * packet functions/utilities |