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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.46 by root, Sun Jun 10 04:44:21 2007 UTC vs.
Revision 1.62 by root, Thu Nov 8 19:43:30 2007 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
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 Deliantra 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 * Deliantra 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 <support@deliantra.net>
22 */ 21 */
23 22
24using namespace std; 23using namespace std;
25 24
26#include <global.h> 25#include <global.h>
… …
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 if (!((pticks + fd) & 7))
53 {
54 // check time of last ack, and, if too old, kill connection
55 struct tcp_info tcpi;
56 socklen_t len = sizeof (tcpi);
57
58 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
59 {
60 if (tcpi.tcpi_snd_mss)
61 mss = tcpi.tcpi_snd_mss;
62
63 rtt = tcpi.tcpi_rtt;
64 rttvar = tcpi.tcpi_rttvar;
65
66 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
67 {
68 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
69 write_outputbuffer ();
70
71 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
72 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
73 destroy ();
74 }
75 }
76 }
77#endif
78 45
79 /** 46 /**
80 * Writes data to socket. 47 * Writes data to socket.
81 * 48 *
82 * 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
… …
84 */ 51 */
85 52
86 // write a nop to the socket at least every IDLE_NOP seconds. 53 // write a nop to the socket at least every IDLE_NOP seconds.
87 if (!outputbuffer.len) 54 if (!outputbuffer.len)
88 { 55 {
89 if (last_send + IDLE_PING <= NOW) 56 if (last_send + IDLE_PING <= NOW && pl && pl->active)
90 { 57 {
91 // this is a bit ugly, but map1/map1a seem to be the only 58 // this is a bit ugly, but map1/map1a seem to be the only
92 // nop'able commands and they are quite small. 59 // nop'able commands and they are quite small.
93 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 60 packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
94 send_packet (sl); 61 send_packet (sl);
… …
165 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
166 return 2 + pkt_len; 133 return 2 + pkt_len;
167 134
168 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
169 { 136 {
170 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);
171 destroy (); 138 destroy ();
172 return -1; 139 return -1;
173 } 140 }
174 } 141 }
175 142
… …
249 { 216 {
250 data += 6; 217 data += 6;
251 len -= 6; 218 len -= 6;
252 } 219 }
253 220
254 if (len > 4 && !strncmp (data, "say " , 4)) 221 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
255 return true; 222 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
256 if (len > 5 && !strncmp (data, "chat ", 5)) 223 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
257 return true; 224
225 if (len == 7 && !strcmp (data, "suicide")) return true;
258 226
259 return false; 227 return false;
260} 228}
261 229
262void 230void
… …
269 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 237 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
270 else 238 else
271 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 239 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
272 } 240 }
273 else 241 else
274 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 242 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
275} 243}
276 244
277bool 245bool
278client::handle_packet () 246client::handle_packet ()
279{ 247{
… …
320 288
321 goto next_packet; 289 goto next_packet;
322 } 290 }
323 291
324 // If we get here, we didn't find a valid command. 292 // If we get here, we didn't find a valid command.
325 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 293 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
326next_packet: 294next_packet:
327 skip_packet (pkt_len); 295 skip_packet (pkt_len);
328 296
329 // input buffer has space again 297 // input buffer has space again
330 socket_ev.poll (socket_ev.poll () | PE_R); 298 socket_ev.poll (socket_ev.poll () | PE_R);
… …
384 } 352 }
385 else 353 else
386 { 354 {
387 inbuf_len += amount; 355 inbuf_len += amount;
388 356
389 cmd_ev.start ();
390 }
391 }
392}
393
394// called whenever we have additional commands to process
395void
396client::cmd_cb (iw &w)
397{
398 if (handle_packet ()) 357 if (handle_packet ())
399 w.start (); 358 {
400 else 359 while (handle_packet ())
401 flush (); 360 ;
361
362 flush ();
363 }
364 }
365 }
402} 366}
403 367
404/******************************************************************************* 368/*******************************************************************************
405 * 369 *
406 * Start of write related routines. 370 * Start of write related routines.
… …
462client::send_packet (packet &sl) 426client::send_packet (packet &sl)
463{ 427{
464 if (destroyed ()) 428 if (destroyed ())
465 return; 429 return;
466 430
467 if (sl.length () >= MAXSOCKBUF) 431 if (sl.length () > MAXSOCKBUF)
468 { 432 {
469 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 ());
470 /* 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
471 * it easier to debug. 435 * it easier to debug.
472 */ 436 */
… …
510 va_end (ap); 474 va_end (ap);
511 475
512 send_packet (sl); 476 send_packet (sl);
513} 477}
514 478
515void 479// returns true when the message needs special (read: perl) treatment
516client::send_drawinfo (const char *msg, int flags) 480static bool
517{ 481msg_is_special (const char *msg)
518 send_packet_printf ("drawinfo %d %s", flags, msg); 482{
483 return msg [strcspn (msg, "<[&\n")];
519} 484}
520 485
521void 486void
522client::send_msg (int color, const char *type, const char *msg) 487client::send_msg (int color, const char *type, const char *msg)
523{ 488{
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))
498 cfperl_send_msg (this, color, type, msg);
524 if (can_msg) 499 else if (can_msg)
525 send_packet_printf ("msg %d %s %s", color, type, msg); 500 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
526 else if (color < 0) 501 else if (color < 0)
527 return; // client cannot handle this 502 return; // client cannot handle this
528 else if (strchr (msg, '<') || strchr (msg, '&'))
529 {
530 //TODO: should escape/modify to old syntax
531 send_packet_printf ("drawinfo %d %s", color, msg);
532 }
533 else 503 else
534 send_packet_printf ("drawinfo %d %s", color, msg); 504 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
505}
506
507void
508client::send_drawinfo (const char *msg, int flags)
509{
510 send_msg (flags, "log", msg);
535} 511}
536 512
537/*********************************************************************** 513/***********************************************************************
538 * 514 *
539 * packet functions/utilities 515 * packet functions/utilities

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