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/cvs/deliantra/server/socket/lowlevel.C
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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.53 by root, Sat Jul 28 12:02:58 2007 UTC vs.
Revision 1.60 by root, Mon Oct 1 01:09:10 2007 UTC

… …
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
43void 40void
44client::flush () 41client::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
… …
383 } 351 }
384 else 352 else
385 { 353 {
386 inbuf_len += amount; 354 inbuf_len += amount;
387 355
388 cmd_ev.start ();
389 }
390 }
391}
392
393// called whenever we have additional commands to process
394void
395client::cmd_cb (iw &w)
396{
397 if (handle_packet ()) 356 if (handle_packet ())
398 w.start (); 357 {
399 else 358 while (handle_packet ())
400 flush (); 359 ;
360
361 flush ();
362 }
363 }
364 }
401} 365}
402 366
403/******************************************************************************* 367/*******************************************************************************
404 * 368 *
405 * Start of write related routines. 369 * Start of write related routines.
… …
461client::send_packet (packet &sl) 425client::send_packet (packet &sl)
462{ 426{
463 if (destroyed ()) 427 if (destroyed ())
464 return; 428 return;
465 429
466 if (sl.length () >= MAXSOCKBUF) 430 if (sl.length () > MAXSOCKBUF)
467 { 431 {
468 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 432 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 433 /* Almost certainly we've overflowed a buffer, so quit now to make
470 * it easier to debug. 434 * it easier to debug.
471 */ 435 */
… …
519} 483}
520 484
521void 485void
522client::send_msg (int color, const char *type, const char *msg) 486client::send_msg (int color, const char *type, const char *msg)
523{ 487{
524 if (msg_is_special (msg)) 488 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
489 {
490 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
491 return;
492 }
493
494 int len = strlen (msg);
495
496 if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))
525 cfperl_send_msg (this, color, type, msg); 497 cfperl_send_msg (this, color, type, msg);
526 else if (can_msg) 498 else if (can_msg)
527 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 499 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
528 else if (color < 0) 500 else if (color < 0)
529 return; // client cannot handle this 501 return; // client cannot handle this

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