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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 | // 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 time of last ack, and, if too old, kill connection |
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51 | socklen_t len = sizeof (tcpi); |
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52 | |
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53 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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54 | { |
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55 | if (tcpi.tcpi_snd_mss) |
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56 | mss = tcpi.tcpi_snd_mss; |
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57 | |
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58 | #if 0 |
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59 | fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n", |
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60 | tcpi.tcpi_unacked, |
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61 | tcpi.tcpi_sacked, |
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62 | tcpi.tcpi_lost, |
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63 | tcpi.tcpi_retrans, |
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64 | tcpi.tcpi_fackets, |
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65 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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66 | |
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67 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
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68 | #endif |
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69 | |
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70 | // do this only when player is active |
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71 | if (pl && pl->active |
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72 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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73 | { |
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74 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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75 | write_outputbuffer (); |
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76 | |
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77 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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78 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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79 | destroy (); |
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80 | } |
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81 | } |
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82 | #endif |
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83 | |
45 | |
84 | /** |
46 | /** |
85 | * Writes data to socket. |
47 | * Writes data to socket. |
86 | * |
48 | * |
87 | * 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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254 | { |
216 | { |
255 | data += 6; |
217 | data += 6; |
256 | len -= 6; |
218 | len -= 6; |
257 | } |
219 | } |
258 | |
220 | |
259 | if (len > 4 && !strncmp (data, "say " , 4)) |
221 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
260 | return true; |
222 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
261 | if (len > 5 && !strncmp (data, "chat ", 5)) |
223 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
262 | return true; |
224 | |
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225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
263 | |
226 | |
264 | return false; |
227 | return false; |
265 | } |
228 | } |
266 | |
229 | |
267 | void |
230 | void |
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389 | } |
352 | } |
390 | else |
353 | else |
391 | { |
354 | { |
392 | inbuf_len += amount; |
355 | inbuf_len += amount; |
393 | |
356 | |
394 | cmd_ev.start (); |
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395 | } |
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396 | } |
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397 | } |
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398 | |
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399 | // called whenever we have additional commands to process |
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400 | void |
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401 | client::cmd_cb (iw &w) |
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402 | { |
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403 | if (handle_packet ()) |
357 | if (handle_packet ()) |
404 | w.start (); |
358 | { |
405 | else |
359 | while (handle_packet ()) |
406 | 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 | } |
407 | } |
366 | } |
408 | |
367 | |
409 | /******************************************************************************* |
368 | /******************************************************************************* |
410 | * |
369 | * |
411 | * Start of write related routines. |
370 | * Start of write related routines. |
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467 | client::send_packet (packet &sl) |
426 | client::send_packet (packet &sl) |
468 | { |
427 | { |
469 | if (destroyed ()) |
428 | if (destroyed ()) |
470 | return; |
429 | return; |
471 | |
430 | |
472 | if (sl.length () >= MAXSOCKBUF) |
431 | if (sl.length () > MAXSOCKBUF) |
473 | { |
432 | { |
474 | 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 ()); |
475 | /* 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 |
476 | * it easier to debug. |
435 | * it easier to debug. |
477 | */ |
436 | */ |
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525 | } |
484 | } |
526 | |
485 | |
527 | void |
486 | void |
528 | client::send_msg (int color, const char *type, const char *msg) |
487 | client::send_msg (int color, const char *type, const char *msg) |
529 | { |
488 | { |
530 | 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)) |
531 | cfperl_send_msg (this, color, type, msg); |
498 | cfperl_send_msg (this, color, type, msg); |
532 | else if (can_msg) |
499 | else if (can_msg) |
533 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
500 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
534 | else if (color < 0) |
501 | else if (color < 0) |
535 | return; // client cannot handle this |
502 | return; // client cannot handle this |