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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.48 by root, Sun Jun 24 04:09:29 2007 UTC vs.
Revision 1.60 by root, Mon Oct 1 01:09:10 2007 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. 2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team 4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
5 * Copyright (©) 1992,2007 Frank Tore Johansen 5 * Copyright (©) 1992,2007 Frank Tore Johansen
6 * 6 *
7 * Crossfire TRT is free software; you can redistribute it and/or modify it 7 * Crossfire TRT is free software: you can redistribute it and/or modify
8 * under the terms of the GNU General Public License as published by the Free 8 * it under the terms of the GNU General Public License as published by
9 * Software Foundation; either version 2 of the License, or (at your option) 9 * the Free Software Foundation, either version 3 of the License, or
10 * any later version. 10 * (at your option) any later version.
11 * 11 *
12 * This program is distributed in the hope that it will be useful, but 12 * This program is distributed in the hope that it will be useful,
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * for more details. 15 * GNU General Public License for more details.
16 * 16 *
17 * You should have received a copy of the GNU General Public License along 17 * You should have received a copy of the GNU General Public License
18 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * 19 *
21 * The authors can be reached via e-mail to <crossfire@schmorp.de> 20 * The authors can be reached via e-mail to <crossfire@schmorp.de>
22 */ 21 */
23 22
24using namespace std; 23using namespace std;
32# include <sys/socket.h> 31# include <sys/socket.h>
33# include <netinet/in.h> 32# include <netinet/in.h>
34# include <netinet/tcp.h> 33# include <netinet/tcp.h>
35#endif 34#endif
36 35
37// disconnect a socket after this many seconds without an ack
38#define SOCKET_TIMEOUT 8.
39
40// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
41// forcing an ack regularly. 37// forcing an ack regularly.
42#define IDLE_PING 2. 38#define IDLE_PING 2.
43 39
44void 40void
45client::flush () 41client::flush ()
46{ 42{
47 if (destroyed ()) 43 if (destroyed ())
48 return; 44 return;
49
50#if HAVE_TCP_INFO
51 // check about once per second, spread evenly over all clients
52 // do this only when player is active
53 if (!((pticks + fd) & 7) && pl && pl->active)
54 {
55 // check time of last ack, and, if too old, kill connection
56 struct tcp_info tcpi;
57 socklen_t len = sizeof (tcpi);
58
59 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
60 {
61 if (tcpi.tcpi_snd_mss)
62 mss = tcpi.tcpi_snd_mss;
63
64 rtt = tcpi.tcpi_rtt;
65 rttvar = tcpi.tcpi_rttvar;
66
67 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
68 {
69 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
70 write_outputbuffer ();
71
72 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
73 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
74 destroy ();
75 }
76 }
77 }
78#endif
79 45
80 /** 46 /**
81 * Writes data to socket. 47 * Writes data to socket.
82 * 48 *
83 * 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
166 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
167 return 2 + pkt_len; 133 return 2 + pkt_len;
168 134
169 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
170 { 136 {
171 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);
172 destroy (); 138 destroy ();
173 return -1; 139 return -1;
174 } 140 }
175 } 141 }
176 142
270 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 236 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
271 else 237 else
272 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 238 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
273 } 239 }
274 else 240 else
275 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);
276} 242}
277 243
278bool 244bool
279client::handle_packet () 245client::handle_packet ()
280{ 246{
321 287
322 goto next_packet; 288 goto next_packet;
323 } 289 }
324 290
325 // If we get here, we didn't find a valid command. 291 // If we get here, we didn't find a valid command.
326 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);
327next_packet: 293next_packet:
328 skip_packet (pkt_len); 294 skip_packet (pkt_len);
329 295
330 // input buffer has space again 296 // input buffer has space again
331 socket_ev.poll (socket_ev.poll () | PE_R); 297 socket_ev.poll (socket_ev.poll () | PE_R);
385 } 351 }
386 else 352 else
387 { 353 {
388 inbuf_len += amount; 354 inbuf_len += amount;
389 355
390 cmd_ev.start ();
391 }
392 }
393}
394
395// called whenever we have additional commands to process
396void
397client::cmd_cb (iw &w)
398{
399 if (handle_packet ()) 356 if (handle_packet ())
400 w.start (); 357 {
401 else 358 while (handle_packet ())
402 flush (); 359 ;
360
361 flush ();
362 }
363 }
364 }
403} 365}
404 366
405/******************************************************************************* 367/*******************************************************************************
406 * 368 *
407 * Start of write related routines. 369 * Start of write related routines.
463client::send_packet (packet &sl) 425client::send_packet (packet &sl)
464{ 426{
465 if (destroyed ()) 427 if (destroyed ())
466 return; 428 return;
467 429
468 if (sl.length () >= MAXSOCKBUF) 430 if (sl.length () > MAXSOCKBUF)
469 { 431 {
470 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 ());
471 /* 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
472 * it easier to debug. 434 * it easier to debug.
473 */ 435 */
521} 483}
522 484
523void 485void
524client::send_msg (int color, const char *type, const char *msg) 486client::send_msg (int color, const char *type, const char *msg)
525{ 487{
526 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))
527 cfperl_send_msg (this, color, type, msg); 497 cfperl_send_msg (this, color, type, msg);
528 else if (can_msg) 498 else if (can_msg)
529 send_packet_printf ("msg %d %s %s", color, type, msg); 499 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
530 else if (color < 0) 500 else if (color < 0)
531 return; // client cannot handle this 501 return; // client cannot handle this
532 else 502 else
533 send_packet_printf ("drawinfo %d %s", color, msg); 503 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
534} 504}
535 505
536void 506void
537client::send_drawinfo (const char *msg, int flags) 507client::send_drawinfo (const char *msg, int flags)
538{ 508{

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