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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.50 by root, Thu Jul 12 19:36:58 2007 UTC vs.
Revision 1.65 by root, Thu May 8 20:03:50 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#define HAVE_SIOCOUTQ 1 //TODO configure.ac support
37#if HAVE_SIOCOUTQ
38# include <linux/sockios.h>
39#endif
40
41// disconnect a socket after this many seconds without an ack
42#define SOCKET_TIMEOUT 8.
43
44// force a packet when idle for more than this many seconds, 36// force a packet when idle for more than this many seconds,
45// forcing an ack regularly. 37// forcing an ack regularly.
46#define IDLE_PING 2. 38#define IDLE_PING 2.
47 39
48void 40void
49client::flush () 41client::flush ()
50{ 42{
51 if (destroyed ()) 43 if (destroyed ())
52 return; 44 return;
53
54# if HAVE_SIOCOUTQ
55 {
56 int value;
57
58 if (!ioctl (fd, SIOCOUTQ, &value))
59 outq = value;
60 }
61# endif
62
63#if HAVE_TCP_INFO
64 // check about once per second, spread evenly over all clients
65 // do this only when player is active
66 if (!((pticks + fd) & 7) && pl && pl->active)
67 {
68 // check time of last ack, and, if too old, kill connection
69 struct tcp_info tcpi;
70 socklen_t len = sizeof (tcpi);
71
72 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
73 {
74 if (tcpi.tcpi_snd_mss)
75 mss = tcpi.tcpi_snd_mss;
76
77 rtt = tcpi.tcpi_rtt;
78 rttvar = tcpi.tcpi_rttvar;
79
80 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
81 {
82 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
83 write_outputbuffer ();
84
85 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
86 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
87 destroy ();
88 }
89 }
90 }
91#endif
92 45
93 /** 46 /**
94 * Writes data to socket. 47 * Writes data to socket.
95 * 48 *
96 * 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
… …
109 } 62 }
110 else 63 else
111 return; 64 return;
112 } 65 }
113 66
114 if (socket_ev.poll () & PE_W) 67 if (socket_ev.poll () & EV_WRITE)
115 return; 68 return;
116 69
117 last_send = NOW; 70 last_send = NOW;
118 write_outputbuffer (); 71 write_outputbuffer ();
119} 72}
… …
146 // just retry 99 // just retry
147 } 100 }
148 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
149 { 102 {
150 // delay till ready 103 // delay till ready
151 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
152 socket_ev.start (); 105 socket_ev.start ();
153 return; 106 return;
154 } 107 }
155 else 108 else
156 { 109 {
… …
158 destroy (); 111 destroy ();
159 return; 112 return;
160 } 113 }
161 } 114 }
162 115
163 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
164} 117}
165 118
166/****************************************************************************** 119/******************************************************************************
167 * 120 *
168 * Start of read routines. 121 * Start of read routines.
… …
179 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
180 return 2 + pkt_len; 133 return 2 + pkt_len;
181 134
182 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
183 { 136 {
184 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);
185 destroy (); 138 destroy ();
186 return -1; 139 return -1;
187 } 140 }
188 } 141 }
189 142
… …
263 { 216 {
264 data += 6; 217 data += 6;
265 len -= 6; 218 len -= 6;
266 } 219 }
267 220
268 if (len > 4 && !strncmp (data, "say " , 4)) 221 if (len > 4 && data [3] == ' ' && !strncmp (data, "say " , 4)) return true;
269 return true; 222 if (len > 5 && data [4] == ' ' && !strncmp (data, "chat " , 5)) return true;
270 if (len > 5 && !strncmp (data, "chat ", 5)) 223 if (len > 6 && data [5] == ' ' && !strncmp (data, "shout ", 6)) return true;
271 return true; 224
225 if (len == 7 && !strcmp (data, "suicide")) return true;
272 226
273 return false; 227 return false;
274} 228}
275 229
276void 230void
… …
283 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 237 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
284 else 238 else
285 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 239 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
286 } 240 }
287 else 241 else
288 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 242 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
289} 243}
290 244
291bool 245bool
292client::handle_packet () 246client::handle_packet ()
293{ 247{
… …
334 288
335 goto next_packet; 289 goto next_packet;
336 } 290 }
337 291
338 // If we get here, we didn't find a valid command. 292 // If we get here, we didn't find a valid command.
339 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 293 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
340next_packet: 294next_packet:
341 skip_packet (pkt_len); 295 skip_packet (pkt_len);
342 296
343 // input buffer has space again 297 // input buffer has space again
344 socket_ev.poll (socket_ev.poll () | PE_R); 298 socket_ev.poll (socket_ev.poll () | EV_READ);
345 299
346 return true; 300 return true;
347} 301}
348 302
349// callback called when socket is either readable or writable 303// callback called when socket is either readable or writable
350void 304void
351client::socket_cb (iow &w, int got) 305client::socket_cb (iow &w, int revents)
352{ 306{
353 //TODO remove when we have better socket cleanup logic 307 //TODO remove when we have better socket cleanup logic
354 if (destroyed ()) 308 if (destroyed ())
355 { 309 {
356 socket_ev.poll (0); 310 socket_ev.poll (0);
357 return; 311 return;
358 } 312 }
359 313
360 if (got & PE_W) 314 if (revents & EV_WRITE)
361 { 315 {
362 write_outputbuffer (); 316 write_outputbuffer ();
363 317
364 if (!outputbuffer.len) 318 if (!outputbuffer.len)
365 socket_ev.poll (socket_ev.poll () & ~PE_W); 319 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
366 } 320 }
367 321
368 if (got & PE_R) 322 if (revents & EV_READ)
369 { 323 {
370 //TODO: rate-limit tcp connection in better ways, important 324 //TODO: rate-limit tcp connection in better ways, important
371 325
372 int amount = sizeof (inbuf) - inbuf_len; 326 int amount = sizeof (inbuf) - inbuf_len;
373 327
374 if (!amount) 328 if (!amount)
375 { 329 {
376 // input buffer full 330 // input buffer full
377 socket_ev.poll (socket_ev.poll () & ~PE_R); 331 socket_ev.poll (socket_ev.poll () & ~EV_READ);
378 return; 332 return;
379 } 333 }
380 334
381 amount = read (fd, inbuf + inbuf_len, amount); 335 amount = read (fd, inbuf + inbuf_len, amount);
382 336
… …
398 } 352 }
399 else 353 else
400 { 354 {
401 inbuf_len += amount; 355 inbuf_len += amount;
402 356
403 cmd_ev.start ();
404 }
405 }
406}
407
408// called whenever we have additional commands to process
409void
410client::cmd_cb (iw &w)
411{
412 if (handle_packet ()) 357 if (handle_packet ())
413 w.start (); 358 {
414 else 359 while (handle_packet ())
415 flush (); 360 ;
361
362 flush ();
363 }
364 }
365 }
416} 366}
417 367
418/******************************************************************************* 368/*******************************************************************************
419 * 369 *
420 * Start of write related routines. 370 * Start of write related routines.
… …
476client::send_packet (packet &sl) 426client::send_packet (packet &sl)
477{ 427{
478 if (destroyed ()) 428 if (destroyed ())
479 return; 429 return;
480 430
481 if (sl.length () >= MAXSOCKBUF) 431 if (sl.length () > MAXSOCKBUF)
482 { 432 {
483 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 ());
484 /* 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
485 * it easier to debug. 435 * it easier to debug.
486 */ 436 */
… …
524 va_end (ap); 474 va_end (ap);
525 475
526 send_packet (sl); 476 send_packet (sl);
527} 477}
528 478
529// returns true when the message needs special (read: perl) treatment
530static bool
531msg_is_special (const char *msg)
532{
533 return msg [strcspn (msg, "<[&\n")];
534}
535
536void 479void
537client::send_msg (int color, const char *type, const char *msg) 480client::send_msg (int color, const char *type, const char *msg)
538{ 481{
539 if (msg_is_special (msg)) 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 (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))
540 cfperl_send_msg (this, color, type, msg); 491 cfperl_send_msg (this, color, type, msg);
541 else if (can_msg) 492 else if (can_msg)
542 send_packet_printf ("msg %d %s %s", color, type, msg); 493 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
543 else if (color < 0) 494 else if (color < 0)
544 return; // client cannot handle this 495 return; // client cannot handle this
545 else 496 else
546 send_packet_printf ("drawinfo %d %s", color, msg); 497 send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg);
547} 498}
548 499
549void 500void
550client::send_drawinfo (const char *msg, int flags) 501client::send_drawinfo (const char *msg, int flags)
551{ 502{

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