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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 |
| … | |
… | |
| 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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| 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 |
