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 (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
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6 | * |
5 | * |
7 | * Crossfire TRT is free software: you can redistribute it and/or modify |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
8 | * it under the terms of the GNU General Public License as published by |
7 | * the terms of the Affero GNU General Public License as published by the |
9 | * the Free Software Foundation, either version 3 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
10 | * (at your option) any later version. |
9 | * option) any later version. |
11 | * |
10 | * |
12 | * This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
16 | * |
15 | * |
17 | * You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the Affero GNU General Public License |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
17 | * and the GNU General Public License along with this program. If not, see |
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18 | * <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 about once per second, spread evenly over all clients |
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51 | // do this only when player is active |
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52 | if (!((pticks + fd) & 7) && pl && pl->active) |
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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 | socklen_t len = sizeof (tcpi); |
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56 | |
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57 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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58 | { |
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59 | if (tcpi.tcpi_snd_mss) |
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60 | mss = tcpi.tcpi_snd_mss; |
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61 | |
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62 | //fprintf (stderr, "uack %d sst %d cwnd %d mss %d pmtu %d\n", |
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63 | // tcpi.tcpi_unacked, tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu); |
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64 | |
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65 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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66 | { |
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67 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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68 | write_outputbuffer (); |
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69 | |
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70 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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71 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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72 | destroy (); |
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73 | } |
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74 | } |
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75 | } |
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76 | #endif |
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77 | |
45 | |
78 | /** |
46 | /** |
79 | * Writes data to socket. |
47 | * Writes data to socket. |
80 | * |
48 | * |
81 | * 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 |
… | |
… | |
94 | } |
62 | } |
95 | else |
63 | else |
96 | return; |
64 | return; |
97 | } |
65 | } |
98 | |
66 | |
99 | if (socket_ev.poll () & PE_W) |
67 | if (socket_ev.poll () & EV_WRITE) |
100 | return; |
68 | return; |
101 | |
69 | |
102 | last_send = NOW; |
70 | last_send = NOW; |
103 | write_outputbuffer (); |
71 | write_outputbuffer (); |
104 | } |
72 | } |
… | |
… | |
131 | // just retry |
99 | // just retry |
132 | } |
100 | } |
133 | else if (errno == EAGAIN) |
101 | else if (errno == EAGAIN) |
134 | { |
102 | { |
135 | // delay till ready |
103 | // delay till ready |
136 | socket_ev.poll (socket_ev.poll () | PE_W); |
104 | socket_ev.poll (socket_ev.poll () | EV_WRITE); |
137 | socket_ev.start (); |
105 | socket_ev.start (); |
138 | return; |
106 | return; |
139 | } |
107 | } |
140 | else |
108 | else |
141 | { |
109 | { |
… | |
… | |
143 | destroy (); |
111 | destroy (); |
144 | return; |
112 | return; |
145 | } |
113 | } |
146 | } |
114 | } |
147 | |
115 | |
148 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
116 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
149 | } |
117 | } |
150 | |
118 | |
151 | /****************************************************************************** |
119 | /****************************************************************************** |
152 | * |
120 | * |
153 | * Start of read routines. |
121 | * Start of read routines. |
… | |
… | |
188 | ****************************************************************************/ |
156 | ****************************************************************************/ |
189 | |
157 | |
190 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
158 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
191 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
159 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
192 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
160 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
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161 | |
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162 | static void |
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163 | NopCmd (char *, int, client *) |
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164 | { |
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165 | // do nothing |
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166 | } |
193 | |
167 | |
194 | /** |
168 | /** |
195 | * Dispatch table for the server. |
169 | * Dispatch table for the server. |
196 | */ |
170 | */ |
197 | static struct packet_type packets[] = { |
171 | static struct packet_type packets[] = { |
… | |
… | |
203 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
177 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
204 | {"lookat", PC(LookAt) PF_PLAYING }, |
178 | {"lookat", PC(LookAt) PF_PLAYING }, |
205 | {"lock", PC(LockItem) PF_PLAYING }, |
179 | {"lock", PC(LockItem) PF_PLAYING }, |
206 | {"mark", PC(MarkItem) PF_PLAYING }, |
180 | {"mark", PC(MarkItem) PF_PLAYING }, |
207 | {"move", PC(MoveCmd) PF_PLAYING }, |
181 | {"move", PC(MoveCmd) PF_PLAYING }, |
208 | {"ext", PC(ExtCmd) 0 }, // CF+ |
182 | {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra |
209 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
183 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
210 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
184 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra |
211 | |
185 | |
212 | {"reply", SC(ReplyCmd) 0 }, |
186 | {"reply", SC(ReplyCmd) 0 }, |
213 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
187 | {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra |
214 | {"addme", SC(AddMeCmd) 0 }, |
188 | {"addme", SC(AddMeCmd) 0 }, |
215 | {"askface", SC(AskFaceCmd) 0 }, |
189 | {"askface", SC(AskFaceCmd) 0 }, |
216 | {"requestinfo", SC(RequestInfo) 0 }, |
190 | {"requestinfo", SC(RequestInfo) 0 }, |
217 | {"setfacemode", SC(SetFaceMode) 0 }, |
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218 | {"setsound", SC(SetSound) 0 }, |
191 | {"setsound", SC(SetSound) 0 }, |
219 | {"setup", SC(SetUp) 0 }, |
192 | {"setup", SC(SetUp) 0 }, |
220 | {"version", SC(VersionCmd) 0 }, |
193 | {"version", SC(VersionCmd) 0 }, |
221 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
194 | |
222 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
195 | {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled |
223 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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224 | }; |
196 | }; |
225 | |
197 | |
226 | bool |
198 | bool |
227 | client::may_execute (const packet_type *pkt) const |
199 | client::may_execute (const packet_type *pkt) const |
228 | { |
200 | { |
… | |
… | |
248 | { |
220 | { |
249 | data += 6; |
221 | data += 6; |
250 | len -= 6; |
222 | len -= 6; |
251 | } |
223 | } |
252 | |
224 | |
253 | if (len > 4 && !strncmp (data, "say " , 4)) |
225 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
254 | return true; |
226 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
255 | if (len > 5 && !strncmp (data, "chat ", 5)) |
227 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
256 | return true; |
228 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
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229 | if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
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230 | |
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231 | if (len == 7 && !strcmp (data, "suicide")) return true; |
257 | |
232 | |
258 | return false; |
233 | return false; |
259 | } |
234 | } |
260 | |
235 | |
261 | void |
236 | void |
… | |
… | |
263 | { |
238 | { |
264 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
239 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
265 | { |
240 | { |
266 | //TODO: only one format |
241 | //TODO: only one format |
267 | if (pkt->flags & PF_PLAYER) |
242 | if (pkt->flags & PF_PLAYER) |
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243 | { |
268 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
244 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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245 | pl->need_updated_stats (); |
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246 | } |
269 | else |
247 | else |
270 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
248 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
271 | } |
249 | } |
272 | else |
250 | else |
273 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
251 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
… | |
… | |
286 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
264 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
287 | destroy (); |
265 | destroy (); |
288 | return false; |
266 | return false; |
289 | } |
267 | } |
290 | |
268 | |
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269 | uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
291 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
270 | inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
292 | |
271 | |
293 | /* First, break out beginning word. There are at least |
272 | /* First, break out beginning word. There are at least |
294 | * a few commands that do not have any paremeters. If |
273 | * a few commands that do not have any paremeters. If |
295 | * we get such a command, don't worry about trying |
274 | * we get such a command, don't worry about trying |
296 | * to break it up. |
275 | * to break it up. |
… | |
… | |
307 | { |
286 | { |
308 | data = (char *)inbuf + 2; // better read garbage than segfault |
287 | data = (char *)inbuf + 2; // better read garbage than segfault |
309 | datalen = 0; |
288 | datalen = 0; |
310 | } |
289 | } |
311 | |
290 | |
312 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
291 | for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt) |
313 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
292 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
314 | { |
293 | { |
315 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
294 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
316 | queue_command (pkt, data, datalen); |
295 | queue_command (pkt, data, datalen); |
317 | else |
296 | else |
… | |
… | |
320 | goto next_packet; |
299 | goto next_packet; |
321 | } |
300 | } |
322 | |
301 | |
323 | // If we get here, we didn't find a valid command. |
302 | // If we get here, we didn't find a valid command. |
324 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
303 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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304 | |
325 | next_packet: |
305 | next_packet: |
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306 | inbuf [pkt_len] = save_byte; // rather ugly |
326 | skip_packet (pkt_len); |
307 | skip_packet (pkt_len); |
327 | |
308 | |
328 | // input buffer has space again |
309 | // input buffer has space again |
329 | socket_ev.poll (socket_ev.poll () | PE_R); |
310 | socket_ev.poll (socket_ev.poll () | EV_READ); |
330 | |
311 | |
331 | return true; |
312 | return true; |
332 | } |
313 | } |
333 | |
314 | |
334 | // callback called when socket is either readable or writable |
315 | // callback called when socket is either readable or writable |
335 | void |
316 | void |
336 | client::socket_cb (iow &w, int got) |
317 | client::socket_cb (iow &w, int revents) |
337 | { |
318 | { |
338 | //TODO remove when we have better socket cleanup logic |
319 | //TODO remove when we have better socket cleanup logic |
339 | if (destroyed ()) |
320 | if (destroyed ()) |
340 | { |
321 | { |
341 | socket_ev.poll (0); |
322 | socket_ev.poll (0); |
342 | return; |
323 | return; |
343 | } |
324 | } |
344 | |
325 | |
345 | if (got & PE_W) |
326 | if (revents & EV_WRITE) |
346 | { |
327 | { |
347 | write_outputbuffer (); |
328 | write_outputbuffer (); |
348 | |
329 | |
349 | if (!outputbuffer.len) |
330 | if (!outputbuffer.len) |
350 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
331 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
351 | } |
332 | } |
352 | |
333 | |
353 | if (got & PE_R) |
334 | if (revents & EV_READ) |
354 | { |
335 | { |
355 | //TODO: rate-limit tcp connection in better ways, important |
336 | //TODO: rate-limit tcp connection in better ways, important |
356 | |
337 | |
357 | int amount = sizeof (inbuf) - inbuf_len; |
338 | int amount = sizeof (inbuf) - inbuf_len; |
358 | |
339 | |
359 | if (!amount) |
340 | if (!amount) |
360 | { |
341 | { |
361 | // input buffer full |
342 | // input buffer full |
362 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
343 | socket_ev.poll (socket_ev.poll () & ~EV_READ); |
363 | return; |
344 | return; |
364 | } |
345 | } |
365 | |
346 | |
366 | amount = read (fd, inbuf + inbuf_len, amount); |
347 | amount = read (fd, inbuf + inbuf_len, amount); |
367 | |
348 | |
… | |
… | |
383 | } |
364 | } |
384 | else |
365 | else |
385 | { |
366 | { |
386 | inbuf_len += amount; |
367 | inbuf_len += amount; |
387 | |
368 | |
388 | cmd_ev.start (); |
|
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389 | } |
|
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390 | } |
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391 | } |
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392 | |
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393 | // called whenever we have additional commands to process |
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394 | void |
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395 | client::cmd_cb (iw &w) |
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396 | { |
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397 | if (handle_packet ()) |
369 | if (handle_packet ()) |
398 | w.start (); |
370 | { |
399 | else |
371 | while (handle_packet ()) |
400 | flush (); |
372 | ; |
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373 | |
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374 | flush (); |
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375 | } |
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376 | } |
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377 | } |
401 | } |
378 | } |
402 | |
379 | |
403 | /******************************************************************************* |
380 | /******************************************************************************* |
404 | * |
381 | * |
405 | * Start of write related routines. |
382 | * Start of write related routines. |
… | |
… | |
461 | client::send_packet (packet &sl) |
438 | client::send_packet (packet &sl) |
462 | { |
439 | { |
463 | if (destroyed ()) |
440 | if (destroyed ()) |
464 | return; |
441 | return; |
465 | |
442 | |
466 | if (sl.length () >= MAXSOCKBUF) |
443 | if (sl.length () > MAXSOCKBUF) |
467 | { |
444 | { |
468 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
445 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
469 | /* Almost certainly we've overflowed a buffer, so quit now to make |
446 | /* Almost certainly we've overflowed a buffer, so quit now to make |
470 | * it easier to debug. |
447 | * it easier to debug. |
471 | */ |
448 | */ |
… | |
… | |
509 | va_end (ap); |
486 | va_end (ap); |
510 | |
487 | |
511 | send_packet (sl); |
488 | send_packet (sl); |
512 | } |
489 | } |
513 | |
490 | |
514 | // returns true when the message needs special (read: perl) treatment |
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515 | static bool |
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516 | msg_is_special (const char *msg) |
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517 | { |
|
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518 | return msg [strcspn (msg, "<[&\n")]; |
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519 | } |
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520 | |
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521 | void |
491 | void |
522 | client::send_msg (int color, const char *type, const char *msg) |
492 | client::send_msg (int color, const char *type, const char *msg) |
523 | { |
493 | { |
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494 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
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495 | { |
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496 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
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497 | return; |
|
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498 | } |
|
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499 | |
|
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500 | int len = strlen (msg); |
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501 | |
|
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502 | if (!(color & NDI_VERBATIM) |
524 | if (msg_is_special (msg)) |
503 | && (msg_is_special (msg) |
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504 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
525 | cfperl_send_msg (this, color, type, msg); |
505 | cfperl_send_msg (this, color, type, msg); |
526 | else if (can_msg) |
506 | else |
527 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
507 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
528 | else if (color < 0) |
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529 | return; // client cannot handle this |
|
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530 | else |
|
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531 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
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532 | } |
508 | } |
533 | |
509 | |
534 | void |
510 | void |
535 | client::send_drawinfo (const char *msg, int flags) |
511 | client::send_drawinfo (const char *msg, int flags) |
536 | { |
512 | { |