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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 | #define HAVE_SIOCOUTQ 1 //TODO configure.ac support |
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37 | #if HAVE_SIOCOUTQ |
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38 | # include <linux/sockios.h> |
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39 | #endif |
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40 | |
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41 | // disconnect a socket after this many seconds without an ack |
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42 | #define SOCKET_TIMEOUT 8. |
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43 | |
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44 | // force a packet when idle for more than this many seconds, |
36 | // force a packet when idle for more than this many seconds, |
45 | // forcing an ack regularly. |
37 | // forcing an ack regularly. |
46 | #define IDLE_PING 2. |
38 | #define IDLE_PING 2. |
47 | |
39 | |
48 | void |
40 | void |
49 | client::flush () |
41 | client::flush () |
50 | { |
42 | { |
51 | if (destroyed ()) |
43 | if (destroyed ()) |
52 | return; |
44 | return; |
53 | |
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54 | # if HAVE_SIOCOUTQ |
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55 | { |
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56 | int value; |
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57 | |
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58 | if (!ioctl (fd, SIOCOUTQ, &value)) |
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59 | outq = value; |
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60 | } |
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61 | # endif |
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62 | |
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63 | #if HAVE_TCP_INFO |
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64 | // check about once per second, spread evenly over all clients |
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65 | // do this only when player is active |
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66 | if (!((pticks + fd) & 7) && pl && pl->active) |
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67 | { |
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68 | // check time of last ack, and, if too old, kill connection |
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69 | struct tcp_info tcpi; |
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70 | socklen_t len = sizeof (tcpi); |
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71 | |
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72 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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73 | { |
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74 | if (tcpi.tcpi_snd_mss) |
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75 | mss = tcpi.tcpi_snd_mss; |
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76 | |
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77 | rtt = tcpi.tcpi_rtt; |
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78 | rttvar = tcpi.tcpi_rttvar; |
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79 | |
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80 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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81 | { |
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82 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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83 | write_outputbuffer (); |
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84 | |
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85 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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86 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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87 | destroy (); |
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88 | } |
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89 | } |
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90 | } |
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91 | #endif |
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92 | |
45 | |
93 | /** |
46 | /** |
94 | * Writes data to socket. |
47 | * Writes data to socket. |
95 | * |
48 | * |
96 | * 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 |
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179 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
180 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
181 | |
134 | |
182 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
183 | { |
136 | { |
184 | 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); |
185 | destroy (); |
138 | destroy (); |
186 | return -1; |
139 | return -1; |
187 | } |
140 | } |
188 | } |
141 | } |
189 | |
142 | |
… | |
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263 | { |
216 | { |
264 | data += 6; |
217 | data += 6; |
265 | len -= 6; |
218 | len -= 6; |
266 | } |
219 | } |
267 | |
220 | |
268 | if (len > 4 && !strncmp (data, "say " , 4)) |
221 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
269 | return true; |
222 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
270 | if (len > 5 && !strncmp (data, "chat ", 5)) |
223 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
271 | return true; |
224 | |
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225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
272 | |
226 | |
273 | return false; |
227 | return false; |
274 | } |
228 | } |
275 | |
229 | |
276 | void |
230 | void |
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283 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
237 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
284 | else |
238 | else |
285 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
239 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
286 | } |
240 | } |
287 | else |
241 | else |
288 | 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); |
289 | } |
243 | } |
290 | |
244 | |
291 | bool |
245 | bool |
292 | client::handle_packet () |
246 | client::handle_packet () |
293 | { |
247 | { |
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334 | |
288 | |
335 | goto next_packet; |
289 | goto next_packet; |
336 | } |
290 | } |
337 | |
291 | |
338 | // If we get here, we didn't find a valid command. |
292 | // If we get here, we didn't find a valid command. |
339 | 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); |
340 | next_packet: |
294 | next_packet: |
341 | skip_packet (pkt_len); |
295 | skip_packet (pkt_len); |
342 | |
296 | |
343 | // input buffer has space again |
297 | // input buffer has space again |
344 | socket_ev.poll (socket_ev.poll () | PE_R); |
298 | socket_ev.poll (socket_ev.poll () | PE_R); |
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398 | } |
352 | } |
399 | else |
353 | else |
400 | { |
354 | { |
401 | inbuf_len += amount; |
355 | inbuf_len += amount; |
402 | |
356 | |
403 | cmd_ev.start (); |
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404 | } |
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405 | } |
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406 | } |
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407 | |
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408 | // called whenever we have additional commands to process |
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409 | void |
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410 | client::cmd_cb (iw &w) |
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411 | { |
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412 | if (handle_packet ()) |
357 | if (handle_packet ()) |
413 | w.start (); |
358 | { |
414 | else |
359 | while (handle_packet ()) |
415 | 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 | } |
416 | } |
366 | } |
417 | |
367 | |
418 | /******************************************************************************* |
368 | /******************************************************************************* |
419 | * |
369 | * |
420 | * Start of write related routines. |
370 | * Start of write related routines. |
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476 | client::send_packet (packet &sl) |
426 | client::send_packet (packet &sl) |
477 | { |
427 | { |
478 | if (destroyed ()) |
428 | if (destroyed ()) |
479 | return; |
429 | return; |
480 | |
430 | |
481 | if (sl.length () >= MAXSOCKBUF) |
431 | if (sl.length () > MAXSOCKBUF) |
482 | { |
432 | { |
483 | 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 ()); |
484 | /* 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 |
485 | * it easier to debug. |
435 | * it easier to debug. |
486 | */ |
436 | */ |
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534 | } |
484 | } |
535 | |
485 | |
536 | void |
486 | void |
537 | client::send_msg (int color, const char *type, const char *msg) |
487 | client::send_msg (int color, const char *type, const char *msg) |
538 | { |
488 | { |
539 | if (msg_is_special (msg)) |
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)) |
540 | cfperl_send_msg (this, color, type, msg); |
498 | cfperl_send_msg (this, color, type, msg); |
541 | else if (can_msg) |
499 | else if (can_msg) |
542 | send_packet_printf ("msg %d %s %s", color, type, msg); |
500 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
543 | else if (color < 0) |
501 | else if (color < 0) |
544 | return; // client cannot handle this |
502 | return; // client cannot handle this |
545 | else |
503 | else |
546 | send_packet_printf ("drawinfo %d %s", color, msg); |
504 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
547 | } |
505 | } |
548 | |
506 | |
549 | void |
507 | void |
550 | client::send_drawinfo (const char *msg, int flags) |
508 | client::send_drawinfo (const char *msg, int flags) |
551 | { |
509 | { |