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/cvs/deliantra/server/socket/lowlevel.C
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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.50 by root, Thu Jul 12 19:36:58 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#define HAVE_SIOCOUTQ 1 //TODO configure.ac support
37#if HAVE_SIOCOUTQ
38# include <linux/sockios.h>
39#endif
40
41// disconnect a socket after this many seconds without an ack
42#define SOCKET_TIMEOUT 8.
43
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
48void 40void
49client::flush () 41client::flush ()
50{ 42{
51 if (destroyed ()) 43 if (destroyed ())
52 return; 44 return;
53
54# if HAVE_SIOCOUTQ
55 {
56 int value;
57
58 if (!ioctl (fd, SIOCOUTQ, &value))
59 outq = value;
60 }
61# endif
62
63#if HAVE_TCP_INFO
64 // check about once per second, spread evenly over all clients
65 // do this only when player is active
66 if (!((pticks + fd) & 7) && pl && pl->active)
67 {
68 // check time of last ack, and, if too old, kill connection
69 struct tcp_info tcpi;
70 socklen_t len = sizeof (tcpi);
71
72 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
73 {
74 if (tcpi.tcpi_snd_mss)
75 mss = tcpi.tcpi_snd_mss;
76
77 rtt = tcpi.tcpi_rtt;
78 rttvar = tcpi.tcpi_rttvar;
79
80 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
81 {
82 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
83 write_outputbuffer ();
84
85 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
86 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
87 destroy ();
88 }
89 }
90 }
91#endif
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
… …
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
… …
283 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 236 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
284 else 237 else
285 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 238 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
286 } 239 }
287 else 240 else
288 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 241 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
289} 242}
290 243
291bool 244bool
292client::handle_packet () 245client::handle_packet ()
293{ 246{
… …
334 287
335 goto next_packet; 288 goto next_packet;
336 } 289 }
337 290
338 // If we get here, we didn't find a valid command. 291 // 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); 292 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
340next_packet: 293next_packet:
341 skip_packet (pkt_len); 294 skip_packet (pkt_len);
342 295
343 // input buffer has space again 296 // input buffer has space again
344 socket_ev.poll (socket_ev.poll () | PE_R); 297 socket_ev.poll (socket_ev.poll () | PE_R);
… …
398 } 351 }
399 else 352 else
400 { 353 {
401 inbuf_len += amount; 354 inbuf_len += amount;
402 355
403 cmd_ev.start ();
404 }
405 }
406}
407
408// called whenever we have additional commands to process
409void
410client::cmd_cb (iw &w)
411{
412 if (handle_packet ()) 356 if (handle_packet ())
413 w.start (); 357 {
414 else 358 while (handle_packet ())
415 flush (); 359 ;
360
361 flush ();
362 }
363 }
364 }
416} 365}
417 366
418/******************************************************************************* 367/*******************************************************************************
419 * 368 *
420 * Start of write related routines. 369 * Start of write related routines.
… …
476client::send_packet (packet &sl) 425client::send_packet (packet &sl)
477{ 426{
478 if (destroyed ()) 427 if (destroyed ())
479 return; 428 return;
480 429
481 if (sl.length () >= MAXSOCKBUF) 430 if (sl.length () > MAXSOCKBUF)
482 { 431 {
483 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 ());
484 /* 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
485 * it easier to debug. 434 * it easier to debug.
486 */ 435 */
… …
534} 483}
535 484
536void 485void
537client::send_msg (int color, const char *type, const char *msg) 486client::send_msg (int color, const char *type, const char *msg)
538{ 487{
539 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))
540 cfperl_send_msg (this, color, type, msg); 497 cfperl_send_msg (this, color, type, msg);
541 else if (can_msg) 498 else if (can_msg)
542 send_packet_printf ("msg %d %s %s", color, type, msg); 499 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
543 else if (color < 0) 500 else if (color < 0)
544 return; // client cannot handle this 501 return; // client cannot handle this
545 else 502 else
546 send_packet_printf ("drawinfo %d %s", color, msg); 503 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
547} 504}
548 505
549void 506void
550client::send_drawinfo (const char *msg, int flags) 507client::send_drawinfo (const char *msg, int flags)
551{ 508{

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