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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.55 by root, Sun Jul 29 13:36:40 2007 UTC vs.
Revision 1.64 by root, Tue May 6 16:55:26 2008 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. 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 (©) 2005,2006,2007,2008 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 7 * Deliantra is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by 8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or 9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) 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, 12 * This program is distributed in the hope that it will be useful,
15 * GNU General Public License 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 17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * 19 *
20 * 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>
21 */ 21 */
22 22
23using namespace std; 23using namespace std;
24 24
25#include <global.h> 25#include <global.h>
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// disconnect a socket after this many seconds without an ack
37#define SOCKET_TIMEOUT 8.
38
39// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
40// forcing an ack regularly. 37// forcing an ack regularly.
41#define IDLE_PING 2. 38#define IDLE_PING 2.
42 39
43void 40void
44client::flush () 41client::flush ()
45{ 42{
46 if (destroyed ()) 43 if (destroyed ())
47 return; 44 return;
48
49#if HAVE_TCP_INFO
50 // check time of last ack, and, if too old, kill connection
51 socklen_t len = sizeof (tcpi);
52
53 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
54 {
55 if (tcpi.tcpi_snd_mss)
56 mss = tcpi.tcpi_snd_mss;
57
58#if 0
59 fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n",
60 tcpi.tcpi_unacked,
61 tcpi.tcpi_sacked,
62 tcpi.tcpi_lost,
63 tcpi.tcpi_retrans,
64 tcpi.tcpi_fackets,
65 tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss,
66
67 tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked));
68#endif
69
70 // do this only when player is active
71 if (pl && pl->active
72 && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
73 {
74 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
75 write_outputbuffer ();
76
77 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
78 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
79 destroy ();
80 }
81 }
82#endif
83 45
84 /** 46 /**
85 * Writes data to socket. 47 * Writes data to socket.
86 * 48 *
87 * 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
100 } 62 }
101 else 63 else
102 return; 64 return;
103 } 65 }
104 66
105 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
106 return; 68 return;
107 69
108 last_send = NOW; 70 last_send = NOW;
109 write_outputbuffer (); 71 write_outputbuffer ();
110} 72}
137 // just retry 99 // just retry
138 } 100 }
139 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
140 { 102 {
141 // delay till ready 103 // delay till ready
142 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
143 socket_ev.start (); 105 socket_ev.start ();
144 return; 106 return;
145 } 107 }
146 else 108 else
147 { 109 {
149 destroy (); 111 destroy ();
150 return; 112 return;
151 } 113 }
152 } 114 }
153 115
154 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
155} 117}
156 118
157/****************************************************************************** 119/******************************************************************************
158 * 120 *
159 * Start of read routines. 121 * Start of read routines.
254 { 216 {
255 data += 6; 217 data += 6;
256 len -= 6; 218 len -= 6;
257 } 219 }
258 220
259 if (len > 4 && !strncmp (data, "say " , 4)) 221 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
260 return true; 222 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
261 if (len > 5 && !strncmp (data, "chat ", 5)) 223 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
262 return true; 224
225 if (len == 7 && !strcmp (data, "suicide")) return true;
263 226
264 return false; 227 return false;
265} 228}
266 229
267void 230void
330 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); 293 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
331next_packet: 294next_packet:
332 skip_packet (pkt_len); 295 skip_packet (pkt_len);
333 296
334 // input buffer has space again 297 // input buffer has space again
335 socket_ev.poll (socket_ev.poll () | PE_R); 298 socket_ev.poll (socket_ev.poll () | EV_READ);
336 299
337 return true; 300 return true;
338} 301}
339 302
340// callback called when socket is either readable or writable 303// callback called when socket is either readable or writable
341void 304void
342client::socket_cb (iow &w, int got) 305client::socket_cb (iow &w, int revents)
343{ 306{
344 //TODO remove when we have better socket cleanup logic 307 //TODO remove when we have better socket cleanup logic
345 if (destroyed ()) 308 if (destroyed ())
346 { 309 {
347 socket_ev.poll (0); 310 socket_ev.poll (0);
348 return; 311 return;
349 } 312 }
350 313
351 if (got & PE_W) 314 if (revents & EV_WRITE)
352 { 315 {
353 write_outputbuffer (); 316 write_outputbuffer ();
354 317
355 if (!outputbuffer.len) 318 if (!outputbuffer.len)
356 socket_ev.poll (socket_ev.poll () & ~PE_W); 319 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
357 } 320 }
358 321
359 if (got & PE_R) 322 if (revents & EV_READ)
360 { 323 {
361 //TODO: rate-limit tcp connection in better ways, important 324 //TODO: rate-limit tcp connection in better ways, important
362 325
363 int amount = sizeof (inbuf) - inbuf_len; 326 int amount = sizeof (inbuf) - inbuf_len;
364 327
365 if (!amount) 328 if (!amount)
366 { 329 {
367 // input buffer full 330 // input buffer full
368 socket_ev.poll (socket_ev.poll () & ~PE_R); 331 socket_ev.poll (socket_ev.poll () & ~EV_READ);
369 return; 332 return;
370 } 333 }
371 334
372 amount = read (fd, inbuf + inbuf_len, amount); 335 amount = read (fd, inbuf + inbuf_len, amount);
373 336
389 } 352 }
390 else 353 else
391 { 354 {
392 inbuf_len += amount; 355 inbuf_len += amount;
393 356
394 cmd_ev.start ();
395 }
396 }
397}
398
399// called whenever we have additional commands to process
400void
401client::cmd_cb (iw &w)
402{
403 if (handle_packet ()) 357 if (handle_packet ())
404 w.start (); 358 {
405 else 359 while (handle_packet ())
406 flush (); 360 ;
361
362 flush ();
363 }
364 }
365 }
407} 366}
408 367
409/******************************************************************************* 368/*******************************************************************************
410 * 369 *
411 * Start of write related routines. 370 * Start of write related routines.
525} 484}
526 485
527void 486void
528client::send_msg (int color, const char *type, const char *msg) 487client::send_msg (int color, const char *type, const char *msg)
529{ 488{
530 if (msg_is_special (msg)) 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))
531 cfperl_send_msg (this, color, type, msg); 498 cfperl_send_msg (this, color, type, msg);
532 else if (can_msg) 499 else if (can_msg)
533 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 500 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
534 else if (color < 0) 501 else if (color < 0)
535 return; // client cannot handle this 502 return; // client cannot handle this

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