1 | /* |
1 | /* |
2 | * CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | * |
3 | * |
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
5 | * Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | * |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
7 | * Crossfire TRT 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 2 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, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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, write to the Free Software |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
|
|
20 | * |
19 | * |
21 | * The author can be reached via e-mail to mark@pyramid.com |
20 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
|
|
23 | |
|
|
24 | /** |
|
|
25 | * \file |
|
|
26 | * Low-level socket-related functions. |
|
|
27 | * |
|
|
28 | * \date 2003-12-02 |
|
|
29 | * |
|
|
30 | * Contains some base functions that both the client and server |
|
|
31 | * can use. As such, depending what we are being compiled for will |
|
|
32 | * determine what we can include. the client is designed have |
|
|
33 | * CFCLIENT defined as part of its compile flags. |
|
|
34 | */ |
21 | */ |
35 | |
22 | |
36 | using namespace std; |
23 | using namespace std; |
37 | |
24 | |
38 | #include <global.h> |
25 | #include <global.h> |
39 | #include <sproto.h> |
26 | #include <sproto.h> |
40 | #include <cstdarg> |
27 | #include <cstdarg> |
41 | |
28 | |
42 | #ifdef __linux__ |
29 | #if HAVE_TCP_INFO |
43 | # include <sys/types.h> |
30 | # include <sys/types.h> |
44 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
46 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
47 | #endif |
34 | #endif |
48 | |
35 | |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
36 | // force a packet when idle for more than this many seconds, |
50 | // easily die in 20 seconds... |
37 | // forcing an ack regularly. |
51 | #define SOCKET_TIMEOUT1 10 * 1000 |
38 | #define IDLE_PING 2. |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
|
|
53 | |
39 | |
54 | void |
40 | void |
55 | client::flush () |
41 | client::flush () |
56 | { |
42 | { |
57 | if (destroyed ()) |
43 | if (destroyed ()) |
58 | return; |
44 | return; |
59 | |
|
|
60 | #ifdef __linux__ |
|
|
61 | // check time of last ack, and, if too old, kill connection |
|
|
62 | struct tcp_info tcpi; |
|
|
63 | socklen_t len = sizeof (tcpi); |
|
|
64 | |
|
|
65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
|
66 | { |
|
|
67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
|
|
68 | |
|
|
69 | rtt = tcpi.tcpi_rtt; |
|
|
70 | rttvar = tcpi.tcpi_rttvar; |
|
|
71 | |
|
|
72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
|
|
73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
|
|
74 | { |
|
|
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
|
|
76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
|
|
77 | destroy (); |
|
|
78 | } |
|
|
79 | } |
|
|
80 | #endif |
|
|
81 | |
45 | |
82 | /** |
46 | /** |
83 | * Writes data to socket. |
47 | * Writes data to socket. |
84 | * |
48 | * |
85 | * 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 |
86 | * is called to write it out. |
50 | * is called to write it out. |
87 | */ |
51 | */ |
88 | |
52 | |
89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
53 | // write a nop to the socket at least every IDLE_NOP seconds. |
|
|
54 | if (!outputbuffer.len) |
|
|
55 | { |
|
|
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
|
|
57 | { |
|
|
58 | // this is a bit ugly, but map1/map1a seem to be the only |
|
|
59 | // nop'able commands and they are quite small. |
|
|
60 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
|
|
61 | send_packet (sl); |
|
|
62 | } |
|
|
63 | else |
|
|
64 | return; |
|
|
65 | } |
|
|
66 | |
|
|
67 | if (socket_ev.poll () & PE_W) |
90 | return; |
68 | return; |
91 | |
69 | |
|
|
70 | last_send = NOW; |
92 | write_outputbuffer (); |
71 | write_outputbuffer (); |
93 | } |
72 | } |
94 | |
73 | |
95 | void |
74 | void |
96 | client::write_outputbuffer () |
75 | client::write_outputbuffer () |
… | |
… | |
106 | /* wrap back to start of buffer */ |
85 | /* wrap back to start of buffer */ |
107 | if (outputbuffer.start == SOCKETBUFSIZE) |
86 | if (outputbuffer.start == SOCKETBUFSIZE) |
108 | outputbuffer.start = 0; |
87 | outputbuffer.start = 0; |
109 | |
88 | |
110 | outputbuffer.len -= res; |
89 | outputbuffer.len -= res; |
111 | #ifdef CS_LOGSTATS |
|
|
112 | cst_tot.obytes += res; |
|
|
113 | cst_lst.obytes += res; |
|
|
114 | #endif |
|
|
115 | } |
90 | } |
116 | else if (res == 0) |
91 | else if (res == 0) |
117 | { |
92 | { |
118 | LOG (llevError, "socket write failed, connection closed.\n"); |
93 | LOG (llevError, "socket write failed, connection closed.\n"); |
119 | destroy (); |
94 | destroy (); |
… | |
… | |
157 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
158 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
159 | |
134 | |
160 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
161 | { |
136 | { |
162 | 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); |
163 | destroy (); |
138 | destroy (); |
164 | return -1; |
139 | return -1; |
165 | } |
140 | } |
166 | } |
141 | } |
167 | |
142 | |
… | |
… | |
186 | |
161 | |
187 | /** |
162 | /** |
188 | * Dispatch table for the server. |
163 | * Dispatch table for the server. |
189 | */ |
164 | */ |
190 | static struct packet_type packets[] = { |
165 | static struct packet_type packets[] = { |
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
166 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
192 | {"command", PC(PlayerCmd) PF_PLAYING }, |
167 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
193 | |
168 | |
194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
169 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
|
|
170 | {"ex", PC(ExCmd) PF_PLAYING }, |
195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
171 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
196 | {"lookat", PC(LookAt) PF_PLAYING }, |
172 | {"lookat", PC(LookAt) PF_PLAYING }, |
197 | {"lock", PC(LockItem) PF_PLAYING }, |
173 | {"lock", PC(LockItem) PF_PLAYING }, |
198 | {"mark", PC(MarkItem) PF_PLAYING }, |
174 | {"mark", PC(MarkItem) PF_PLAYING }, |
199 | {"move", PC(MoveCmd) PF_PLAYING }, |
175 | {"move", PC(MoveCmd) PF_PLAYING }, |
200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
176 | {"ext", PC(ExtCmd) 0 }, // CF+ |
201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
177 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
178 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
203 | |
179 | |
204 | {"reply", SC(ReplyCmd) 0 }, |
180 | {"reply", SC(ReplyCmd) 0 }, |
205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
181 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
206 | {"addme", SC(AddMeCmd) 0 }, |
182 | {"addme", SC(AddMeCmd) 0 }, |
207 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
183 | {"askface", SC(AskFaceCmd) 0 }, |
208 | {"requestinfo", SC(RequestInfo) 0 }, |
184 | {"requestinfo", SC(RequestInfo) 0 }, |
209 | {"setfacemode", SC(SetFaceMode) 0 }, |
185 | {"setfacemode", SC(SetFaceMode) 0 }, |
210 | {"setsound", SC(SetSound) 0 }, |
186 | {"setsound", SC(SetSound) 0 }, |
211 | {"setup", SC(SetUp) 0 }, |
187 | {"setup", SC(SetUp) 0 }, |
212 | {"version", SC(VersionCmd) 0 }, |
188 | {"version", SC(VersionCmd) 0 }, |
… | |
… | |
220 | { |
196 | { |
221 | return (!(pkt->flags & PF_PLAYER) || pl) |
197 | return (!(pkt->flags & PF_PLAYER) || pl) |
222 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
198 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
223 | } |
199 | } |
224 | |
200 | |
|
|
201 | // HACK: some commands currently should be executed |
|
|
202 | // even when the player is frozen. this hack detects |
|
|
203 | // those commands. it should be folded into may_execute, |
|
|
204 | // but kept seperate to emphasise the hack aspect, i.e. |
|
|
205 | // do it better, then remove. |
|
|
206 | static bool |
|
|
207 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
|
|
208 | { |
|
|
209 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
|
|
210 | return false; |
|
|
211 | |
|
|
212 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
|
|
213 | return false; |
|
|
214 | |
|
|
215 | if (pkt->flags & PF_COMMAND6) |
|
|
216 | { |
|
|
217 | data += 6; |
|
|
218 | len -= 6; |
|
|
219 | } |
|
|
220 | |
|
|
221 | if (len > 4 && !strncmp (data, "say " , 4)) |
|
|
222 | return true; |
|
|
223 | if (len > 5 && !strncmp (data, "chat ", 5)) |
|
|
224 | return true; |
|
|
225 | |
|
|
226 | return false; |
|
|
227 | } |
|
|
228 | |
225 | void |
229 | void |
226 | client::execute (const packet_type *pkt, char *data, int datalen) |
230 | client::execute (const packet_type *pkt, char *data, int datalen) |
227 | { |
231 | { |
228 | if (may_execute (pkt)) |
232 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
229 | { |
233 | { |
230 | //TODO: only one format |
234 | //TODO: only one format |
231 | if (pkt->flags & PF_PLAYER) |
235 | if (pkt->flags & PF_PLAYER) |
232 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
236 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
233 | else |
237 | else |
234 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
238 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
235 | } |
239 | } |
236 | else |
240 | else |
237 | 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); |
238 | } |
242 | } |
239 | |
243 | |
240 | bool |
244 | bool |
241 | client::handle_packet () |
245 | client::handle_packet () |
242 | { |
246 | { |
… | |
… | |
274 | } |
278 | } |
275 | |
279 | |
276 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
280 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
277 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
281 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
278 | { |
282 | { |
279 | if (pkt->flags & PF_PLAYER) |
283 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
280 | queue_command (pkt, data, datalen); |
284 | queue_command (pkt, data, datalen); |
281 | else |
285 | else |
282 | execute (pkt, data, datalen); |
286 | execute (pkt, data, datalen); |
283 | |
287 | |
284 | goto next_packet; |
288 | goto next_packet; |
285 | } |
289 | } |
286 | |
290 | |
287 | // If we get here, we didn't find a valid command. |
291 | // If we get here, we didn't find a valid command. |
288 | 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); |
289 | next_packet: |
293 | next_packet: |
290 | skip_packet (pkt_len); |
294 | skip_packet (pkt_len); |
291 | |
295 | |
292 | // input buffer has space again |
296 | // input buffer has space again |
293 | socket_ev.poll (socket_ev.poll () | PE_R); |
297 | socket_ev.poll (socket_ev.poll () | PE_R); |
… | |
… | |
347 | } |
351 | } |
348 | else |
352 | else |
349 | { |
353 | { |
350 | inbuf_len += amount; |
354 | inbuf_len += amount; |
351 | |
355 | |
352 | cst_tot.ibytes += amount; |
|
|
353 | cst_lst.ibytes += amount; |
|
|
354 | |
|
|
355 | cmd_ev.start (); |
356 | cmd_ev.start (); |
356 | } |
357 | } |
357 | } |
358 | } |
358 | } |
359 | } |
359 | |
360 | |
… | |
… | |
381 | */ |
382 | */ |
382 | void |
383 | void |
383 | client::send (void *buf_, int len) |
384 | client::send (void *buf_, int len) |
384 | { |
385 | { |
385 | char *buf = (char *)buf_; |
386 | char *buf = (char *)buf_; |
386 | char *pos = buf; |
|
|
387 | int amt = 0; |
|
|
388 | |
387 | |
389 | if (destroyed () || !buf) |
388 | if (destroyed () || !buf) |
390 | return; |
389 | return; |
391 | |
390 | |
392 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
391 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
393 | { |
392 | { |
394 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
393 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
395 | destroy (); |
394 | // shutdown the socket, this is safer than destroying it immediately |
|
|
395 | // as lots of code in the callchain might still access the map etc. |
|
|
396 | shutdown (fd, SHUT_RDWR); |
396 | return; |
397 | return; |
397 | } |
398 | } |
398 | |
399 | |
399 | int avail, end; |
400 | int avail, end; |
400 | |
401 | |
… | |
… | |
428 | client::send_packet (packet &sl) |
429 | client::send_packet (packet &sl) |
429 | { |
430 | { |
430 | if (destroyed ()) |
431 | if (destroyed ()) |
431 | return; |
432 | return; |
432 | |
433 | |
433 | if (sl.length () >= MAXSOCKBUF) |
434 | if (sl.length () > MAXSOCKBUF) |
434 | { |
435 | { |
435 | 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 ()); |
436 | /* 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 |
437 | * it easier to debug. |
438 | * it easier to debug. |
438 | */ |
439 | */ |
… | |
… | |
476 | va_end (ap); |
477 | va_end (ap); |
477 | |
478 | |
478 | send_packet (sl); |
479 | send_packet (sl); |
479 | } |
480 | } |
480 | |
481 | |
|
|
482 | // returns true when the message needs special (read: perl) treatment |
|
|
483 | static bool |
|
|
484 | msg_is_special (const char *msg) |
|
|
485 | { |
|
|
486 | return msg [strcspn (msg, "<[&\n")]; |
|
|
487 | } |
|
|
488 | |
|
|
489 | void |
|
|
490 | client::send_msg (int color, const char *type, const char *msg) |
|
|
491 | { |
|
|
492 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/')) |
|
|
493 | cfperl_send_msg (this, color, type, msg); |
|
|
494 | else if (can_msg) |
|
|
495 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
496 | else if (color < 0) |
|
|
497 | return; // client cannot handle this |
|
|
498 | else |
|
|
499 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
|
500 | } |
|
|
501 | |
|
|
502 | void |
|
|
503 | client::send_drawinfo (const char *msg, int flags) |
|
|
504 | { |
|
|
505 | send_msg (flags, "log", msg); |
|
|
506 | } |
|
|
507 | |
481 | /*********************************************************************** |
508 | /*********************************************************************** |
482 | * |
509 | * |
483 | * packet functions/utilities |
510 | * packet functions/utilities |
484 | * |
511 | * |
485 | **********************************************************************/ |
512 | **********************************************************************/ |
… | |
… | |
491 | int len = strlen (name); |
518 | int len = strlen (name); |
492 | memcpy (cur, name, len); cur += len; |
519 | memcpy (cur, name, len); cur += len; |
493 | *cur++ = ' '; |
520 | *cur++ = ' '; |
494 | } |
521 | } |
495 | |
522 | |
|
|
523 | packet &packet::operator <<(const ber32 v) |
|
|
524 | { |
|
|
525 | enum { maxlen = 32 / 7 + 1}; |
|
|
526 | uint8 buf[maxlen]; |
|
|
527 | uint8 *p = buf + maxlen; |
|
|
528 | uint32 val = v.val; |
|
|
529 | |
|
|
530 | *--p = val & 0x7F; |
|
|
531 | |
|
|
532 | while (val > 0x7F) |
|
|
533 | { |
|
|
534 | val >>= 7; |
|
|
535 | *--p = (val & 0x7F) | 0x80; |
|
|
536 | } |
|
|
537 | |
|
|
538 | return *this << data (p, buf + maxlen - p); |
|
|
539 | } |
|
|
540 | |
496 | packet &packet::operator <<(const data &v) |
541 | packet &packet::operator <<(const data &v) |
497 | { |
542 | { |
498 | if (room () < v.len) |
543 | if (room () < v.len) |
499 | reset (); |
544 | reset (); |
500 | else |
545 | else |
… | |
… | |
537 | return reset (); |
582 | return reset (); |
538 | |
583 | |
539 | cur += len; |
584 | cur += len; |
540 | } |
585 | } |
541 | |
586 | |
542 | /****************************************************************************** |
|
|
543 | * |
|
|
544 | * statistics logging functions. |
|
|
545 | * |
|
|
546 | ******************************************************************************/ |
|
|
547 | |
|
|
548 | #ifdef CS_LOGSTATS |
|
|
549 | |
|
|
550 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
551 | * stats |
|
|
552 | */ |
|
|
553 | CS_Stats cst_tot, cst_lst; |
|
|
554 | |
|
|
555 | /** |
|
|
556 | * Writes out the gathered stats. We clear cst_lst. |
|
|
557 | */ |
|
|
558 | void |
|
|
559 | write_cs_stats (void) |
|
|
560 | { |
|
|
561 | time_t now = time (NULL); |
|
|
562 | |
|
|
563 | /* If no connections recently, don't both to log anything */ |
|
|
564 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
565 | return; |
|
|
566 | |
|
|
567 | /* CSSTAT is put in so scripts can easily find the line */ |
|
|
568 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
569 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
570 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
571 | cst_lst.ibytes = 0; |
|
|
572 | cst_lst.obytes = 0; |
|
|
573 | cst_lst.time_start = now; |
|
|
574 | } |
|
|
575 | #endif |
|
|
576 | |
|
|