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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.44 by root, Sat Jun 9 22:54:28 2007 UTC vs.
Revision 1.53 by root, Sat Jul 28 12:02:58 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
24/**
25 * \file
26 * Low-level socket-related functions.
27 *
28 * \date 2003-12-02
29 *
30 * Contains some base functions that both the client and server
31 * can use. As such, depending what we are being compiled for will
32 * determine what we can include. the client is designed have
33 * CFCLIENT defined as part of its compile flags.
34 */
35
36using namespace std; 23using namespace std;
37 24
38#include <global.h> 25#include <global.h>
39#include <sproto.h> 26#include <sproto.h>
40#include <cstdarg> 27#include <cstdarg>
41 28
42#ifdef __linux__ 29#if HAVE_TCP_INFO
43# include <sys/types.h> 30# include <sys/types.h>
44# include <sys/socket.h> 31# include <sys/socket.h>
45# include <netinet/in.h> 32# include <netinet/in.h>
46# include <netinet/tcp.h> 33# include <netinet/tcp.h>
47#endif 34#endif
57client::flush () 44client::flush ()
58{ 45{
59 if (destroyed ()) 46 if (destroyed ())
60 return; 47 return;
61 48
62#ifdef __linux__ //TODO: this is available on bsds, too, use a configure test. 49#if HAVE_TCP_INFO
63 // check about once per second, spread evenly over all clients 50 // check about once per second, spread evenly over all clients
64 if (!((pticks + fd) & 7)) 51 // do this only when player is active
52 if (!((pticks + fd) & 7) && pl && pl->active)
65 { 53 {
66 // check time of last ack, and, if too old, kill connection 54 // check time of last ack, and, if too old, kill connection
67 struct tcp_info tcpi;
68 socklen_t len = sizeof (tcpi); 55 socklen_t len = sizeof (tcpi);
69 56
70 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) 57 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
71 { 58 {
72 rtt = tcpi.tcpi_rtt; 59 if (tcpi.tcpi_snd_mss)
73 rttvar = tcpi.tcpi_rttvar; 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);
74 64
75 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) 65 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
76 { 66 {
77 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); 67 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
78 write_outputbuffer (); 68 write_outputbuffer ();
79 69
80 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, 70 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
81 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); 71 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
82 destroy (); 72 destroy ();
93 */ 83 */
94 84
95 // write a nop to the socket at least every IDLE_NOP seconds. 85 // write a nop to the socket at least every IDLE_NOP seconds.
96 if (!outputbuffer.len) 86 if (!outputbuffer.len)
97 { 87 {
98 if (last_send + IDLE_PING <= NOW) 88 if (last_send + IDLE_PING <= NOW && pl && pl->active)
99 { 89 {
100 // this is a bit ugly, but map1/map1a seem to be the only 90 // this is a bit ugly, but map1/map1a seem to be the only
101 // nop'able commands and they are quite small. 91 // nop'able commands and they are quite small.
102 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 92 packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
103 send_packet (sl); 93 send_packet (sl);
174 if (inbuf_len >= 2 + pkt_len) 164 if (inbuf_len >= 2 + pkt_len)
175 return 2 + pkt_len; 165 return 2 + pkt_len;
176 166
177 if (inbuf_len == sizeof (inbuf)) 167 if (inbuf_len == sizeof (inbuf))
178 { 168 {
179 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); 169 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY);
180 destroy (); 170 destroy ();
181 return -1; 171 return -1;
182 } 172 }
183 } 173 }
184 174
278 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 268 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
279 else 269 else
280 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 270 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
281 } 271 }
282 else 272 else
283 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 273 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
284} 274}
285 275
286bool 276bool
287client::handle_packet () 277client::handle_packet ()
288{ 278{
329 319
330 goto next_packet; 320 goto next_packet;
331 } 321 }
332 322
333 // If we get here, we didn't find a valid command. 323 // If we get here, we didn't find a valid command.
334 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 324 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
335next_packet: 325next_packet:
336 skip_packet (pkt_len); 326 skip_packet (pkt_len);
337 327
338 // input buffer has space again 328 // input buffer has space again
339 socket_ev.poll (socket_ev.poll () | PE_R); 329 socket_ev.poll (socket_ev.poll () | PE_R);
519 va_end (ap); 509 va_end (ap);
520 510
521 send_packet (sl); 511 send_packet (sl);
522} 512}
523 513
524void 514// returns true when the message needs special (read: perl) treatment
525client::send_drawinfo (const char *msg, int flags) 515static bool
526{ 516msg_is_special (const char *msg)
527 send_packet_printf ("drawinfo %d %s", flags, msg); 517{
518 return msg [strcspn (msg, "<[&\n")];
528} 519}
529 520
530void 521void
531client::send_msg (int color, const char *type, const char *msg) 522client::send_msg (int color, const char *type, const char *msg)
532{ 523{
524 if (msg_is_special (msg))
525 cfperl_send_msg (this, color, type, msg);
533 if (can_msg) 526 else if (can_msg)
534 send_packet_printf ("msg %d %s %s", color, type, msg); 527 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
535 else if (color < 0) 528 else if (color < 0)
536 return; // client cannot handle this 529 return; // client cannot handle this
537 else if (strchr (msg, '<') || strchr (msg, '&'))
538 {
539 //TODO: should escape/modify to old syntax
540 send_packet_printf ("drawinfo %d %s", color, msg);
541 }
542 else 530 else
543 send_packet_printf ("drawinfo %d %s", color, msg); 531 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
532}
533
534void
535client::send_drawinfo (const char *msg, int flags)
536{
537 send_msg (flags, "log", msg);
544} 538}
545 539
546/*********************************************************************** 540/***********************************************************************
547 * 541 *
548 * packet functions/utilities 542 * packet functions/utilities

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