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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 1.57 by root, Sat Sep 1 08:03:46 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 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
269 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 236 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
270 else 237 else
271 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 238 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
272 } 239 }
273 else 240 else
274 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);
275} 242}
276 243
277bool 244bool
278client::handle_packet () 245client::handle_packet ()
279{ 246{
320 287
321 goto next_packet; 288 goto next_packet;
322 } 289 }
323 290
324 // If we get here, we didn't find a valid command. 291 // 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); 292 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
326next_packet: 293next_packet:
327 skip_packet (pkt_len); 294 skip_packet (pkt_len);
328 295
329 // input buffer has space again 296 // input buffer has space again
330 socket_ev.poll (socket_ev.poll () | PE_R); 297 socket_ev.poll (socket_ev.poll () | PE_R);
462client::send_packet (packet &sl) 429client::send_packet (packet &sl)
463{ 430{
464 if (destroyed ()) 431 if (destroyed ())
465 return; 432 return;
466 433
467 if (sl.length () >= MAXSOCKBUF) 434 if (sl.length () > MAXSOCKBUF)
468 { 435 {
469 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 436 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 437 /* Almost certainly we've overflowed a buffer, so quit now to make
471 * it easier to debug. 438 * it easier to debug.
472 */ 439 */
510 va_end (ap); 477 va_end (ap);
511 478
512 send_packet (sl); 479 send_packet (sl);
513} 480}
514 481
515void 482// returns true when the message needs special (read: perl) treatment
516client::send_drawinfo (const char *msg, int flags) 483static bool
517{ 484msg_is_special (const char *msg)
518 send_packet_printf ("drawinfo %d %s", flags, msg); 485{
486 return msg [strcspn (msg, "<[&\n")];
519} 487}
520 488
521void 489void
522client::send_msg (int color, const char *type, const char *msg) 490client::send_msg (int color, const char *type, const char *msg)
523{ 491{
492 if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/'))
493 cfperl_send_msg (this, color, type, msg);
524 if (can_msg) 494 else if (can_msg)
525 send_packet_printf ("msg %d %s %s", color, type, msg); 495 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
526 else if (color < 0) 496 else if (color < 0)
527 return; // client cannot handle this 497 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 498 else
534 send_packet_printf ("drawinfo %d %s", color, msg); 499 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
500}
501
502void
503client::send_drawinfo (const char *msg, int flags)
504{
505 send_msg (flags, "log", msg);
535} 506}
536 507
537/*********************************************************************** 508/***********************************************************************
538 * 509 *
539 * packet functions/utilities 510 * packet functions/utilities

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