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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.53 by root, Sat Jul 28 12:02:58 2007 UTC vs.
Revision 1.66 by root, Fri Sep 19 01:39:45 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 about once per second, spread evenly over all clients
51 // do this only when player is active
52 if (!((pticks + fd) & 7) && pl && pl->active)
53 {
54 // check time of last ack, and, if too old, kill connection
55 socklen_t len = sizeof (tcpi);
56
57 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
58 {
59 if (tcpi.tcpi_snd_mss)
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);
64
65 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
66 {
67 send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
68 write_outputbuffer ();
69
70 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
71 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
72 destroy ();
73 }
74 }
75 }
76#endif
77 45
78 /** 46 /**
79 * Writes data to socket. 47 * Writes data to socket.
80 * 48 *
81 * 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
… …
94 } 62 }
95 else 63 else
96 return; 64 return;
97 } 65 }
98 66
99 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
100 return; 68 return;
101 69
102 last_send = NOW; 70 last_send = NOW;
103 write_outputbuffer (); 71 write_outputbuffer ();
104} 72}
… …
131 // just retry 99 // just retry
132 } 100 }
133 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
134 { 102 {
135 // delay till ready 103 // delay till ready
136 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
137 socket_ev.start (); 105 socket_ev.start ();
138 return; 106 return;
139 } 107 }
140 else 108 else
141 { 109 {
… …
143 destroy (); 111 destroy ();
144 return; 112 return;
145 } 113 }
146 } 114 }
147 115
148 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
149} 117}
150 118
151/****************************************************************************** 119/******************************************************************************
152 * 120 *
153 * Start of read routines. 121 * Start of read routines.
… …
248 { 216 {
249 data += 6; 217 data += 6;
250 len -= 6; 218 len -= 6;
251 } 219 }
252 220
253 if (len > 4 && !strncmp (data, "say " , 4)) 221 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
254 return true; 222 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
255 if (len > 5 && !strncmp (data, "chat ", 5)) 223 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
256 return true; 224
225 if (len == 7 && !strcmp (data, "suicide")) return true;
257 226
258 return false; 227 return false;
259} 228}
260 229
261void 230void
… …
324 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);
325next_packet: 294next_packet:
326 skip_packet (pkt_len); 295 skip_packet (pkt_len);
327 296
328 // input buffer has space again 297 // input buffer has space again
329 socket_ev.poll (socket_ev.poll () | PE_R); 298 socket_ev.poll (socket_ev.poll () | EV_READ);
330 299
331 return true; 300 return true;
332} 301}
333 302
334// callback called when socket is either readable or writable 303// callback called when socket is either readable or writable
335void 304void
336client::socket_cb (iow &w, int got) 305client::socket_cb (iow &w, int revents)
337{ 306{
338 //TODO remove when we have better socket cleanup logic 307 //TODO remove when we have better socket cleanup logic
339 if (destroyed ()) 308 if (destroyed ())
340 { 309 {
341 socket_ev.poll (0); 310 socket_ev.poll (0);
342 return; 311 return;
343 } 312 }
344 313
345 if (got & PE_W) 314 if (revents & EV_WRITE)
346 { 315 {
347 write_outputbuffer (); 316 write_outputbuffer ();
348 317
349 if (!outputbuffer.len) 318 if (!outputbuffer.len)
350 socket_ev.poll (socket_ev.poll () & ~PE_W); 319 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
351 } 320 }
352 321
353 if (got & PE_R) 322 if (revents & EV_READ)
354 { 323 {
355 //TODO: rate-limit tcp connection in better ways, important 324 //TODO: rate-limit tcp connection in better ways, important
356 325
357 int amount = sizeof (inbuf) - inbuf_len; 326 int amount = sizeof (inbuf) - inbuf_len;
358 327
359 if (!amount) 328 if (!amount)
360 { 329 {
361 // input buffer full 330 // input buffer full
362 socket_ev.poll (socket_ev.poll () & ~PE_R); 331 socket_ev.poll (socket_ev.poll () & ~EV_READ);
363 return; 332 return;
364 } 333 }
365 334
366 amount = read (fd, inbuf + inbuf_len, amount); 335 amount = read (fd, inbuf + inbuf_len, amount);
367 336
… …
383 } 352 }
384 else 353 else
385 { 354 {
386 inbuf_len += amount; 355 inbuf_len += amount;
387 356
388 cmd_ev.start ();
389 }
390 }
391}
392
393// called whenever we have additional commands to process
394void
395client::cmd_cb (iw &w)
396{
397 if (handle_packet ()) 357 if (handle_packet ())
398 w.start (); 358 {
399 else 359 while (handle_packet ())
400 flush (); 360 ;
361
362 flush ();
363 }
364 }
365 }
401} 366}
402 367
403/******************************************************************************* 368/*******************************************************************************
404 * 369 *
405 * Start of write related routines. 370 * Start of write related routines.
… …
461client::send_packet (packet &sl) 426client::send_packet (packet &sl)
462{ 427{
463 if (destroyed ()) 428 if (destroyed ())
464 return; 429 return;
465 430
466 if (sl.length () >= MAXSOCKBUF) 431 if (sl.length () > MAXSOCKBUF)
467 { 432 {
468 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 ());
469 /* 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
470 * it easier to debug. 435 * it easier to debug.
471 */ 436 */
… …
509 va_end (ap); 474 va_end (ap);
510 475
511 send_packet (sl); 476 send_packet (sl);
512} 477}
513 478
514// returns true when the message needs special (read: perl) treatment
515static bool
516msg_is_special (const char *msg)
517{
518 return msg [strcspn (msg, "<[&\n")];
519}
520
521void 479void
522client::send_msg (int color, const char *type, const char *msg) 480client::send_msg (int color, const char *type, const char *msg)
523{ 481{
482 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
483 {
484 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
485 return;
486 }
487
488 int len = strlen (msg);
489
490 if (!(color & NDI_VERBATIM)
524 if (msg_is_special (msg)) 491 && (msg_is_special (msg)
492 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
525 cfperl_send_msg (this, color, type, msg); 493 cfperl_send_msg (this, color, type, msg);
526 else if (can_msg) 494 else if (can_msg)
527 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 495 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
528 else if (color < 0) 496 else if (color < 0)
529 return; // client cannot handle this 497 return; // client cannot handle this

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