1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game for X-windows |
3 | |
3 | * |
|
|
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (C) 1992 Frank Tore Johansen |
5 | |
6 | * |
6 | This program is free software; you can redistribute it and/or modify |
7 | * This program is free software; you can redistribute it and/or modify |
7 | 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 |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | * the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
10 | * (at your option) any later version. |
10 | |
11 | * |
11 | 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, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
15 | * GNU General Public License for more details. |
15 | |
16 | * |
16 | 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 |
17 | along with this program; if not, write to the Free Software |
18 | * along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | |
20 | * |
20 | The author can be reached via e-mail to mark@pyramid.com |
21 | * The author can be reached via e-mail to mark@pyramid.com |
21 | */ |
22 | */ |
22 | |
23 | |
23 | /** |
24 | /** |
24 | * \file |
25 | * \file |
25 | * Low-level socket-related functions. |
26 | * Low-level socket-related functions. |
26 | * |
27 | * |
27 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
… | |
… | |
40 | |
41 | |
41 | #ifdef __linux__ |
42 | #ifdef __linux__ |
42 | # include <sys/types.h> |
43 | # include <sys/types.h> |
43 | # include <sys/socket.h> |
44 | # include <sys/socket.h> |
44 | # include <netinet/in.h> |
45 | # include <netinet/in.h> |
45 | # define TCP_HZ 1000 // sorry... |
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|
46 | # include <netinet/tcp.h> |
46 | # include <netinet/tcp.h> |
47 | #endif |
47 | #endif |
48 | |
48 | |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
50 | // easily die in 20 seconds... |
50 | // easily die in 20 seconds... |
51 | #define SOCKET_TIMEOUT1 10 |
51 | #define SOCKET_TIMEOUT1 10 * 1000 |
52 | #define SOCKET_TIMEOUT2 20 |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
53 | |
53 | |
54 | void |
54 | void |
55 | client::flush () |
55 | client::flush () |
56 | { |
56 | { |
|
|
57 | if (destroyed ()) |
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58 | return; |
|
|
59 | |
57 | #ifdef __linux__ |
60 | #ifdef __linux__ |
58 | // check time of last ack, and, if too old, kill connection |
61 | // check time of last ack, and, if too old, kill connection |
59 | struct tcp_info tcpi; |
62 | struct tcp_info tcpi; |
60 | socklen_t len = sizeof (tcpi); |
63 | socklen_t len = sizeof (tcpi); |
61 | |
64 | |
… | |
… | |
64 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
65 | |
68 | |
66 | rtt = tcpi.tcpi_rtt; |
69 | rtt = tcpi.tcpi_rtt; |
67 | rttvar = tcpi.tcpi_rttvar; |
70 | rttvar = tcpi.tcpi_rttvar; |
68 | |
71 | |
69 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
70 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
71 | { |
74 | { |
72 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
73 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
74 | destroy (); |
77 | destroy (); |
75 | } |
78 | } |
… | |
… | |
188 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
189 | {"command", PC(PlayerCmd) PF_PLAYING }, |
192 | {"command", PC(PlayerCmd) PF_PLAYING }, |
190 | |
193 | |
191 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
192 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
193 | {"reply", PC(ReplyCmd) PF_IMMEDIATE }, |
|
|
194 | {"lookat", PC(LookAt) PF_PLAYING }, |
196 | {"lookat", PC(LookAt) PF_PLAYING }, |
195 | {"lock", PC(LockItem) PF_PLAYING }, |
197 | {"lock", PC(LockItem) PF_PLAYING }, |
196 | {"mark", PC(MarkItem) PF_PLAYING }, |
198 | {"mark", PC(MarkItem) PF_PLAYING }, |
197 | {"move", PC(MoveCmd) PF_PLAYING }, |
199 | {"move", PC(MoveCmd) PF_PLAYING }, |
198 | {"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */ |
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|
199 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
200 | {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */ |
201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
201 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
202 | |
203 | |
|
|
204 | {"reply", SC(ReplyCmd) 0 }, |
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|
205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
203 | {"addme", SC(AddMeCmd) PF_IMMEDIATE }, |
206 | {"addme", SC(AddMeCmd) 0 }, |
204 | {"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */ |
207 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
205 | {"requestinfo", SC(RequestInfo) PF_IMMEDIATE }, |
208 | {"requestinfo", SC(RequestInfo) 0 }, |
206 | {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE }, |
209 | {"setfacemode", SC(SetFaceMode) 0 }, |
207 | {"setsound", SC(SetSound) PF_IMMEDIATE }, |
210 | {"setsound", SC(SetSound) 0 }, |
208 | {"setup", SC(SetUp) PF_IMMEDIATE }, |
211 | {"setup", SC(SetUp) 0 }, |
209 | {"version", SC(VersionCmd) PF_IMMEDIATE }, |
212 | {"version", SC(VersionCmd) 0 }, |
210 | {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */ |
213 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
211 | {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */ |
214 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
212 | {"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /*Added: tchize (smoothing technologies) */ |
215 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
213 | }; |
216 | }; |
214 | |
217 | |
215 | bool |
218 | bool |
216 | client::may_execute (const packet_type *pkt) const |
219 | client::may_execute (const packet_type *pkt) const |
217 | { |
220 | { |
218 | return (!(pkt->flags & PF_PLAYER) || pl) |
221 | return (!(pkt->flags & PF_PLAYER) || pl) |
219 | && (!(pkt->flags & PF_PLAYING) || (pl && pl->state == ST_PLAYING)); |
222 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
220 | } |
223 | } |
221 | |
224 | |
222 | void |
225 | void |
223 | client::execute (const packet_type *pkt, char *data, int datalen) |
226 | client::execute (const packet_type *pkt, char *data, int datalen) |
224 | { |
227 | { |
… | |
… | |
271 | } |
274 | } |
272 | |
275 | |
273 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
276 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
274 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
277 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
275 | { |
278 | { |
276 | if (pkt->flags & PF_IMMEDIATE) |
279 | if (pkt->flags & PF_PLAYER) |
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280 | queue_command (pkt, data, datalen); |
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281 | else |
277 | execute (pkt, data, datalen); |
282 | execute (pkt, data, datalen); |
278 | else |
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279 | queue_command (pkt, data, datalen); |
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280 | |
283 | |
281 | goto next_packet; |
284 | goto next_packet; |
282 | } |
285 | } |
283 | |
286 | |
284 | /* If we get here, we didn't find a valid command. Logging |
287 | // If we get here, we didn't find a valid command. |
285 | * this might be questionable, because a broken client/malicious |
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286 | * user could certainly send a whole bunch of invalid commands. |
|
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287 | */ |
|
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288 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
288 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
289 | next_packet: |
289 | next_packet: |
290 | skip_packet (pkt_len); |
290 | skip_packet (pkt_len); |
291 | |
291 | |
292 | // input buffer has space again |
292 | // input buffer has space again |
… | |
… | |
298 | // callback called when socket is either readable or writable |
298 | // callback called when socket is either readable or writable |
299 | void |
299 | void |
300 | client::socket_cb (iow &w, int got) |
300 | client::socket_cb (iow &w, int got) |
301 | { |
301 | { |
302 | //TODO remove when we have better socket cleanup logic |
302 | //TODO remove when we have better socket cleanup logic |
303 | if (status == Ns_Dead) |
303 | if (destroyed ()) |
304 | { |
304 | { |
305 | socket_ev.poll (0); |
305 | socket_ev.poll (0); |
306 | return; |
306 | return; |
307 | } |
307 | } |
308 | |
308 | |
… | |
… | |
359 | |
359 | |
360 | // called whenever we have additional commands to process |
360 | // called whenever we have additional commands to process |
361 | void |
361 | void |
362 | client::cmd_cb (iw &w) |
362 | client::cmd_cb (iw &w) |
363 | { |
363 | { |
364 | if (handle_packet () /*|| handle_command ()*/)//TODO: re-enable async command execution(?) |
364 | if (handle_packet ()) |
365 | w.start (); |
365 | w.start (); |
366 | else |
366 | else |
367 | flush (); |
367 | flush (); |
368 | } |
368 | } |
369 | |
369 | |
… | |
… | |
384 | { |
384 | { |
385 | char *buf = (char *)buf_; |
385 | char *buf = (char *)buf_; |
386 | char *pos = buf; |
386 | char *pos = buf; |
387 | int amt = 0; |
387 | int amt = 0; |
388 | |
388 | |
389 | if (status == Ns_Dead || !buf) |
389 | if (destroyed () || !buf) |
390 | return; |
390 | return; |
391 | |
391 | |
392 | if ((len + outputbuffer.len) > SOCKETBUFSIZE) |
392 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
393 | { |
393 | { |
394 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
394 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
395 | destroy (); |
395 | destroy (); |
396 | return; |
396 | return; |
397 | } |
397 | } |
… | |
… | |
425 | * shortcut function. |
425 | * shortcut function. |
426 | */ |
426 | */ |
427 | void |
427 | void |
428 | client::send_packet (packet &sl) |
428 | client::send_packet (packet &sl) |
429 | { |
429 | { |
430 | if (status == Ns_Dead) |
430 | if (destroyed ()) |
431 | return; |
431 | return; |
432 | |
432 | |
433 | if (sl.length () >= MAXSOCKBUF) |
433 | if (sl.length () >= MAXSOCKBUF) |
434 | { |
434 | { |
435 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
435 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
… | |
… | |
481 | /*********************************************************************** |
481 | /*********************************************************************** |
482 | * |
482 | * |
483 | * packet functions/utilities |
483 | * packet functions/utilities |
484 | * |
484 | * |
485 | **********************************************************************/ |
485 | **********************************************************************/ |
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486 | |
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487 | packet::packet (const char *name) |
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488 | { |
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489 | reset (); |
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490 | |
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491 | int len = strlen (name); |
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492 | memcpy (cur, name, len); cur += len; |
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493 | *cur++ = ' '; |
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494 | } |
486 | |
495 | |
487 | packet &packet::operator <<(const data &v) |
496 | packet &packet::operator <<(const data &v) |
488 | { |
497 | { |
489 | if (room () < v.len) |
498 | if (room () < v.len) |
490 | reset (); |
499 | reset (); |