… | |
… | |
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 |
|
|
37 | #define SOCKET_TIMEOUT 8. |
|
|
38 | |
|
|
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 | |
|
|
49 | #if HAVE_TCP_INFO |
|
|
50 | // check about once per second, spread evenly over all clients |
|
|
51 | // do this only when player is active |
|
|
52 | if (!((pticks + fd) & 7) && pl && pl->active) |
|
|
53 | { |
|
|
54 | // check time of last ack, and, if too old, kill connection |
|
|
55 | socklen_t len = sizeof (tcpi); |
|
|
56 | |
|
|
57 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
|
58 | { |
|
|
59 | if (tcpi.tcpi_snd_mss) |
|
|
60 | mss = tcpi.tcpi_snd_mss; |
|
|
61 | |
|
|
62 | //fprintf (stderr, "uack %d sst %d cwnd %d mss %d pmtu %d\n", |
|
|
63 | // tcpi.tcpi_unacked, tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu); |
|
|
64 | |
|
|
65 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
|
|
66 | { |
|
|
67 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
|
|
68 | write_outputbuffer (); |
|
|
69 | |
|
|
70 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
|
|
71 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
|
|
72 | destroy (); |
|
|
73 | } |
|
|
74 | } |
|
|
75 | } |
|
|
76 | #endif |
|
|
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 |
… | |
… | |
248 | { |
216 | { |
249 | data += 6; |
217 | data += 6; |
250 | len -= 6; |
218 | len -= 6; |
251 | } |
219 | } |
252 | |
220 | |
253 | if (len > 4 && !strncmp (data, "say " , 4)) |
221 | if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true; |
254 | return true; |
222 | if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
255 | if (len > 5 && !strncmp (data, "chat ", 5)) |
223 | if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true; |
256 | return true; |
224 | |
|
|
225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
257 | |
226 | |
258 | return false; |
227 | return false; |
259 | } |
228 | } |
260 | |
229 | |
261 | void |
230 | void |
… | |
… | |
383 | } |
352 | } |
384 | else |
353 | else |
385 | { |
354 | { |
386 | inbuf_len += amount; |
355 | inbuf_len += amount; |
387 | |
356 | |
388 | cmd_ev.start (); |
|
|
389 | } |
|
|
390 | } |
|
|
391 | } |
|
|
392 | |
|
|
393 | // called whenever we have additional commands to process |
|
|
394 | void |
|
|
395 | client::cmd_cb (iw &w) |
|
|
396 | { |
|
|
397 | if (handle_packet ()) |
357 | if (handle_packet ()) |
398 | w.start (); |
358 | { |
399 | else |
359 | while (handle_packet ()) |
400 | flush (); |
360 | ; |
|
|
361 | |
|
|
362 | flush (); |
|
|
363 | } |
|
|
364 | } |
|
|
365 | } |
401 | } |
366 | } |
402 | |
367 | |
403 | /******************************************************************************* |
368 | /******************************************************************************* |
404 | * |
369 | * |
405 | * Start of write related routines. |
370 | * Start of write related routines. |
… | |
… | |
461 | client::send_packet (packet &sl) |
426 | client::send_packet (packet &sl) |
462 | { |
427 | { |
463 | if (destroyed ()) |
428 | if (destroyed ()) |
464 | return; |
429 | return; |
465 | |
430 | |
466 | if (sl.length () >= MAXSOCKBUF) |
431 | if (sl.length () > MAXSOCKBUF) |
467 | { |
432 | { |
468 | 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 ()); |
469 | /* 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 |
470 | * it easier to debug. |
435 | * it easier to debug. |
471 | */ |
436 | */ |
… | |
… | |
519 | } |
484 | } |
520 | |
485 | |
521 | void |
486 | void |
522 | client::send_msg (int color, const char *type, const char *msg) |
487 | client::send_msg (int color, const char *type, const char *msg) |
523 | { |
488 | { |
524 | if (msg_is_special (msg)) |
489 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
490 | { |
|
|
491 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
492 | return; |
|
|
493 | } |
|
|
494 | |
|
|
495 | int len = strlen (msg); |
|
|
496 | |
|
|
497 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
525 | cfperl_send_msg (this, color, type, msg); |
498 | cfperl_send_msg (this, color, type, msg); |
526 | else if (can_msg) |
499 | else if (can_msg) |
527 | 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); |
528 | else if (color < 0) |
501 | else if (color < 0) |
529 | return; // client cannot handle this |
502 | return; // client cannot handle this |