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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.54 by root, Sun Jul 29 02:24:34 2007 UTC vs.
Revision 1.67 by root, Fri Dec 26 10:44:17 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.
… …
222 {"requestinfo", SC(RequestInfo) 0 }, 184 {"requestinfo", SC(RequestInfo) 0 },
223 {"setfacemode", SC(SetFaceMode) 0 }, 185 {"setfacemode", SC(SetFaceMode) 0 },
224 {"setsound", SC(SetSound) 0 }, 186 {"setsound", SC(SetSound) 0 },
225 {"setup", SC(SetUp) 0 }, 187 {"setup", SC(SetUp) 0 },
226 {"version", SC(VersionCmd) 0 }, 188 {"version", SC(VersionCmd) 0 },
227 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
228 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 189 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
229 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ 190 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
230}; 191};
231 192
232bool 193bool
… …
254 { 215 {
255 data += 6; 216 data += 6;
256 len -= 6; 217 len -= 6;
257 } 218 }
258 219
259 if (len > 4 && !strncmp (data, "say " , 4)) 220 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
260 return true; 221 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
261 if (len > 5 && !strncmp (data, "chat ", 5)) 222 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
262 return true; 223
224 if (len == 7 && !strcmp (data, "suicide")) return true;
263 225
264 return false; 226 return false;
265} 227}
266 228
267void 229void
… …
330 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); 292 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
331next_packet: 293next_packet:
332 skip_packet (pkt_len); 294 skip_packet (pkt_len);
333 295
334 // input buffer has space again 296 // input buffer has space again
335 socket_ev.poll (socket_ev.poll () | PE_R); 297 socket_ev.poll (socket_ev.poll () | EV_READ);
336 298
337 return true; 299 return true;
338} 300}
339 301
340// callback called when socket is either readable or writable 302// callback called when socket is either readable or writable
341void 303void
342client::socket_cb (iow &w, int got) 304client::socket_cb (iow &w, int revents)
343{ 305{
344 //TODO remove when we have better socket cleanup logic 306 //TODO remove when we have better socket cleanup logic
345 if (destroyed ()) 307 if (destroyed ())
346 { 308 {
347 socket_ev.poll (0); 309 socket_ev.poll (0);
348 return; 310 return;
349 } 311 }
350 312
351 if (got & PE_W) 313 if (revents & EV_WRITE)
352 { 314 {
353 write_outputbuffer (); 315 write_outputbuffer ();
354 316
355 if (!outputbuffer.len) 317 if (!outputbuffer.len)
356 socket_ev.poll (socket_ev.poll () & ~PE_W); 318 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
357 } 319 }
358 320
359 if (got & PE_R) 321 if (revents & EV_READ)
360 { 322 {
361 //TODO: rate-limit tcp connection in better ways, important 323 //TODO: rate-limit tcp connection in better ways, important
362 324
363 int amount = sizeof (inbuf) - inbuf_len; 325 int amount = sizeof (inbuf) - inbuf_len;
364 326
365 if (!amount) 327 if (!amount)
366 { 328 {
367 // input buffer full 329 // input buffer full
368 socket_ev.poll (socket_ev.poll () & ~PE_R); 330 socket_ev.poll (socket_ev.poll () & ~EV_READ);
369 return; 331 return;
370 } 332 }
371 333
372 amount = read (fd, inbuf + inbuf_len, amount); 334 amount = read (fd, inbuf + inbuf_len, amount);
373 335
… …
389 } 351 }
390 else 352 else
391 { 353 {
392 inbuf_len += amount; 354 inbuf_len += amount;
393 355
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 ()) 356 if (handle_packet ())
404 w.start (); 357 {
405 else 358 while (handle_packet ())
406 flush (); 359 ;
360
361 flush ();
362 }
363 }
364 }
407} 365}
408 366
409/******************************************************************************* 367/*******************************************************************************
410 * 368 *
411 * Start of write related routines. 369 * Start of write related routines.
… …
467client::send_packet (packet &sl) 425client::send_packet (packet &sl)
468{ 426{
469 if (destroyed ()) 427 if (destroyed ())
470 return; 428 return;
471 429
472 if (sl.length () >= MAXSOCKBUF) 430 if (sl.length () > MAXSOCKBUF)
473 { 431 {
474 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 432 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
475 /* Almost certainly we've overflowed a buffer, so quit now to make 433 /* Almost certainly we've overflowed a buffer, so quit now to make
476 * it easier to debug. 434 * it easier to debug.
477 */ 435 */
… …
515 va_end (ap); 473 va_end (ap);
516 474
517 send_packet (sl); 475 send_packet (sl);
518} 476}
519 477
520// returns true when the message needs special (read: perl) treatment
521static bool
522msg_is_special (const char *msg)
523{
524 return msg [strcspn (msg, "<[&\n")];
525}
526
527void 478void
528client::send_msg (int color, const char *type, const char *msg) 479client::send_msg (int color, const char *type, const char *msg)
529{ 480{
481 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
482 {
483 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
484 return;
485 }
486
487 int len = strlen (msg);
488
489 if (!(color & NDI_VERBATIM)
530 if (msg_is_special (msg)) 490 && (msg_is_special (msg)
491 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
531 cfperl_send_msg (this, color, type, msg); 492 cfperl_send_msg (this, color, type, msg);
532 else if (can_msg) 493 else if (can_msg)
533 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); 494 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
534 else if (color < 0) 495 else if (color < 0)
535 return; // client cannot handle this 496 return; // client cannot handle this

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