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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.31 by root, Mon Jan 15 02:39:41 2007 UTC vs.
Revision 1.89 by root, Tue Nov 6 21:50:36 2012 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 3 *
4 Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 1992 Frank Tore Johansen 5 *
6 6 * Deliantra is free software: you can redistribute it and/or modify it under
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by 7 * the terms of the Affero GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 9 * option) any later version.
11 10 *
12 This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 14 * GNU General Public License for more details.
16 15 *
17 You should have received a copy of the GNU General Public License 16 * You should have received a copy of the Affero GNU General Public License
18 along with this program; if not, write to the Free Software 17 * and the GNU General Public License along with this program. If not, see
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
20
21 The author can be reached via e-mail to mark@pyramid.com
22*/
23
24/**
25 * \file
26 * Low-level socket-related functions.
27 * 19 *
28 * \date 2003-12-02 20 * The authors can be reached via e-mail to <support@deliantra.net>
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 */ 21 */
35 22
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
48 35
49// use a really low timeout, as it doesn't cost any bandwidth, and you can 36// force a packet when idle for more than this many seconds,
50// easily die in 20 seconds... 37// forcing an ack regularly.
51#define SOCKET_TIMEOUT1 10 * 1000 38#define IDLE_PING 2.
52#define SOCKET_TIMEOUT2 20 * 1000
53 39
54void 40void
55client::flush () 41client::flush ()
56{ 42{
57 if (destroyed ()) 43 if (destroyed ())
58 return; 44 return;
59
60#ifdef __linux__
61 // check time of last ack, and, if too old, kill connection
62 struct tcp_info tcpi;
63 socklen_t len = sizeof (tcpi);
64
65 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
66 {
67 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
68
69 rtt = tcpi.tcpi_rtt;
70 rttvar = tcpi.tcpi_rttvar;
71
72 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s
73 && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s
74 {
75 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
76 (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
77 destroy ();
78 }
79 }
80#endif
81 45
82 /** 46 /**
83 * Writes data to socket. 47 * Writes data to socket.
84 * 48 *
85 * 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
86 * is called to write it out. 50 * is called to write it out.
87 */ 51 */
88 52
89 if (!outputbuffer.len || socket_ev.poll () & PE_W) 53 // write a nop to the socket at least every IDLE_NOP seconds.
54 if (!outputbuffer.len)
55 {
56 if (last_send + IDLE_PING <= NOW && pl && pl->active)
57 {
58 // this is a bit ugly, but map1a seems to be the only
59 // nop'able command and it is quite small.
60 packet sl ("map1a");
61 send_packet (sl);
62 }
63 else
64 return;
65 }
66
67 if (socket_ev.poll () & EV_WRITE)
90 return; 68 return;
91 69
70 last_send = NOW;
92 write_outputbuffer (); 71 write_outputbuffer ();
93} 72}
94 73
95void 74void
96client::write_outputbuffer () 75client::write_outputbuffer ()
… …
106 /* wrap back to start of buffer */ 85 /* wrap back to start of buffer */
107 if (outputbuffer.start == SOCKETBUFSIZE) 86 if (outputbuffer.start == SOCKETBUFSIZE)
108 outputbuffer.start = 0; 87 outputbuffer.start = 0;
109 88
110 outputbuffer.len -= res; 89 outputbuffer.len -= res;
111#ifdef CS_LOGSTATS
112 cst_tot.obytes += res;
113 cst_lst.obytes += res;
114#endif
115 } 90 }
116 else if (res == 0) 91 else if (res == 0)
117 { 92 {
118 LOG (llevError, "socket write failed, connection closed.\n"); 93 LOG (llevError, "socket write failed, connection closed.\n");
119 destroy (); 94 destroy ();
… …
124 // just retry 99 // just retry
125 } 100 }
126 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
127 { 102 {
128 // delay till ready 103 // delay till ready
129 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
130 socket_ev.start (); 105 socket_ev.start ();
131 return; 106 return;
132 } 107 }
133 else 108 else
134 { 109 {
… …
136 destroy (); 111 destroy ();
137 return; 112 return;
138 } 113 }
139 } 114 }
140 115
141 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
142} 117}
143 118
144/****************************************************************************** 119/******************************************************************************
145 * 120 *
146 * Start of read routines. 121 * Start of read routines.
… …
157 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
158 return 2 + pkt_len; 133 return 2 + pkt_len;
159 134
160 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
161 { 136 {
162 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);
163 destroy (); 138 destroy ();
164 return -1; 139 return -1;
165 } 140 }
166 } 141 }
167 142
… …
182 157
183// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
184#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
185#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | 160#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
186 161
162static void
163NopCmd (char *, int, client *)
164{
165 // do nothing
166}
167
187/** 168/**
188 * Dispatch table for the server. 169 * Dispatch table for the server.
189 */ 170 */
190static struct packet_type packets[] = { 171static struct packet_type packets[] = {
191 {"ncom", PC(NewPlayerCmd) PF_PLAYING }, 172 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
192 {"command", PC(PlayerCmd) PF_PLAYING }, 173 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 },
193 174
194 {"examine", PC(ExamineCmd) PF_PLAYING }, 175 {"examine", PC(ExamineCmd) PF_PLAYING },
176 {"ex", PC(ExCmd) PF_PLAYING },
195 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
196 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
197 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
198 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
199 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
200 {"ext", PC(ExtCmd) 0 }, /* CF+ */ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
201 {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ 183 {"mapredraw", PC(MapRedrawCmd) 0 },
202 {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
203 185
204 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
205 {"exti", SC(ExtiCmd) 0 }, /* CF+ */ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
206 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
207 {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ 189 {"askface", SC(AskFaceCmd) 0 },
208 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
209 {"setfacemode", SC(SetFaceMode) 0 },
210 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
211 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
212 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
213 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
214 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
215 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
216}; 196};
217 197
218bool 198bool
219client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
220{ 200{
221 return (!(pkt->flags & PF_PLAYER) || pl) 201 return (!(pkt->flags & PF_PLAYER) || pl)
222 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); 202 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
223} 203}
224 204
205// HACK: some commands currently should be executed
206// even when the player is frozen. this hack detects
207// those commands. it should be folded into may_execute,
208// but kept seperate to emphasise the hack aspect, i.e.
209// do it better, then remove.
210static bool
211always_immediate (const client *ns, const packet_type *pkt, const char *data, int len)
212{
213 if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6)))
214 return false;
215
216 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
217 return false;
218
219 if (pkt->flags & PF_COMMAND6)
220 {
221 data += 6;
222 len -= 6;
223 }
224
225 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
226 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
227 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
228 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
229 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
230
231 if (len == 7 && !strcmp (data, "suicide")) return true;
232
233 return false;
234}
235
225void 236void
226client::execute (const packet_type *pkt, char *data, int datalen) 237client::execute (const packet_type *pkt, char *data, int datalen)
227{ 238{
228 if (may_execute (pkt)) 239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
229 { 240 {
230 //TODO: only one format 241 //TODO: only one format
231 if (pkt->flags & PF_PLAYER) 242 if (pkt->flags & PF_PLAYER)
243 {
232 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 244 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
245 pl->need_updated_stats ();
246 }
233 else 247 else
234 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
235 } 249 }
236 else 250 else
237 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 251 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
238} 252}
239 253
240bool 254bool
241client::handle_packet () 255client::handle_packet ()
242{ 256{
… …
250 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
251 destroy (); 265 destroy ();
252 return false; 266 return false;
253 } 267 }
254 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
255 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
256 271
257 /* First, break out beginning word. There are at least 272 /* First, break out beginning word. There are at least
258 * a few commands that do not have any paremeters. If 273 * a few commands that do not have any paremeters. If
259 * we get such a command, don't worry about trying 274 * we get such a command, don't worry about trying
260 * to break it up. 275 * to break it up.
… …
271 { 286 {
272 data = (char *)inbuf + 2; // better read garbage than segfault 287 data = (char *)inbuf + 2; // better read garbage than segfault
273 datalen = 0; 288 datalen = 0;
274 } 289 }
275 290
276 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) 291 for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
277 if (!strcmp ((char *)inbuf + 2, pkt->name)) 292 if (!strcmp ((char *)inbuf + 2, pkt->name))
278 { 293 {
279 if (pkt->flags & PF_PLAYER) 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
280 queue_command (pkt, data, datalen); 295 queue_command (pkt, data, datalen);
281 else 296 else
282 execute (pkt, data, datalen); 297 execute (pkt, data, datalen);
283 298
284 goto next_packet; 299 goto next_packet;
285 } 300 }
286 301
287 // If we get here, we didn't find a valid command. 302 // If we get here, we didn't find a valid command.
288 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 303 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
304
289next_packet: 305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
290 skip_packet (pkt_len); 307 skip_packet (pkt_len);
291 308
292 // input buffer has space again 309 // input buffer has space again
293 socket_ev.poll (socket_ev.poll () | PE_R); 310 socket_ev.poll (socket_ev.poll () | EV_READ);
294 311
295 return true; 312 return true;
296} 313}
297 314
315void
316client::inbuf_handle ()
317{
318 if (!handle_packet ())
319 return;
320
321 while (handle_packet ())
322 ;
323
324 flush ();
325}
326
298// callback called when socket is either readable or writable 327// callback called when socket is either readable or writable
299void 328void
300client::socket_cb (iow &w, int got) 329client::socket_cb (iow &w, int revents)
301{ 330{
302 //TODO remove when we have better socket cleanup logic 331 //TODO remove when we have better socket cleanup logic
303 if (destroyed ()) 332 if (destroyed ())
304 { 333 {
305 socket_ev.poll (0); 334 socket_ev.poll (0);
306 return; 335 return;
307 } 336 }
308 337
309 if (got & PE_W) 338 if (revents & EV_WRITE)
310 { 339 {
311 write_outputbuffer (); 340 write_outputbuffer ();
312 341
313 if (!outputbuffer.len) 342 if (!outputbuffer.len)
314 socket_ev.poll (socket_ev.poll () & ~PE_W); 343 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
315 } 344 }
316 345
317 if (got & PE_R) 346 if (revents & EV_READ)
318 { 347 {
319 //TODO: rate-limit tcp connection in better ways, important 348 //TODO: rate-limit tcp connection in better ways, important
320 349
321 int amount = sizeof (inbuf) - inbuf_len; 350 int amount = sizeof (inbuf) - inbuf_len;
322 351
323 if (!amount) 352 if (!amount)
324 { 353 {
325 // input buffer full 354 // input buffer full
326 socket_ev.poll (socket_ev.poll () & ~PE_R); 355 LOG (llevError, "input buffer overflow.");
356 destroy ();
327 return; 357 return;
328 } 358 }
329 359
360 if (ws_version)
361 {
362 if (ws_inbuf_len + 2048 > ws_inbuf_alloc)
363 ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096);
364
365 int len = read (fd, ws_inbuf + ws_inbuf_len, ws_inbuf_alloc - ws_inbuf_len);
366
367 if (len > 0)
368 {
369 ws_inbuf_len += len;
370
371 if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask
372 return;
373
374 int d = 2;
375 int o = ws_inbuf [0] & 15;
376 int l = ws_inbuf [1] & 127;
377
378 if (l == 126)
379 {
380 l = (ws_inbuf [2] << 8) | ws_inbuf [3];
381 d += 2;
382 }
383 else if (l == 127)
384 {
385 if (ws_inbuf_len < 2 + 8)
386 return;
387
388 // we don't do extra long frames, if a browser wants to send >2**32 bytes,
389 // there are bigger issues to fix.
390 l = (ws_inbuf [6] << 24)
391 | (ws_inbuf [7] << 16)
392 | (ws_inbuf [8] << 8)
393 | ws_inbuf [9];
394 d += 8;
395 }
396
397 // we only continue if we have a complete frame
398 if (ws_inbuf_len < d + 4 + l)
399 return;
400
401 switch (o)
402 {
403 case 0: o = ws_inbuf_type; break; // continuation
404 case 1: ws_inbuf_type = 1; break; // utf-8
405 case 2: ws_inbuf_type = 2; break; // binary
406 }
407
408 if (l > amount)
409 {
410 // input buffer full
411 LOG (llevError, "input buffer overflow (ws).");
412 destroy ();
413 return;
414 }
415
416 for (int i = 0; i < l; ++i)
417 inbuf [inbuf_len + i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)];
418
419 // remove frame
420 ws_inbuf_len -= d + 4 + l;
421 memmove (ws_inbuf, ws_inbuf + d + 4 + l, ws_inbuf_len);
422
423 switch (o)
424 {
425 case 1: // utf-8
426 {
427 uint8 *a = inbuf + inbuf_len;
428 uint8 *b = a;
429 uint8 *c = a + l;
430
431 for (; a < c; ++a, ++b)
432 {
433 *b = *a;
434
435 if (*a >= 0x80)
436 *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a;
437 }
438
439 l -= a - b;
440 }
441 break;
442 case 2: // binary
443 break;
444
445 case 9: // ping
446 {
447 // send pong - we assume ping messages are <64k
448 // as we can't handle >10k at the moment anyway.
449 uint8 hdr [] = { 0x8a, 126, l >> 8, l };
450 send (hdr, sizeof (hdr));
451 send (inbuf + inbuf_len, l);
452 }
453 return;
454
455 case 10: // pong
456 return;
457
458 case 8: // close
459 default:
460 destroy ();
461 return;
462 }
463
464 amount = l;
465 }
466 else
467 amount = -1;
468 }
469 else
330 amount = read (fd, inbuf + inbuf_len, amount); 470 amount = read (fd, inbuf + inbuf_len, amount);
331 471
332 if (!amount) 472 if (!amount)
333 { 473 {
334 destroy (); 474 destroy ();
335 return; 475 return;
… …
346 // should not be here, normally 486 // should not be here, normally
347 } 487 }
348 else 488 else
349 { 489 {
350 inbuf_len += amount; 490 inbuf_len += amount;
351 491 inbuf_handle ();
352 cst_tot.ibytes += amount;
353 cst_lst.ibytes += amount;
354
355 cmd_ev.start ();
356 } 492 }
357 } 493 }
358}
359
360// called whenever we have additional commands to process
361void
362client::cmd_cb (iw &w)
363{
364 if (handle_packet ())
365 w.start ();
366 else
367 flush ();
368} 494}
369 495
370/******************************************************************************* 496/*******************************************************************************
371 * 497 *
372 * Start of write related routines. 498 * Start of write related routines.
… …
381 */ 507 */
382void 508void
383client::send (void *buf_, int len) 509client::send (void *buf_, int len)
384{ 510{
385 char *buf = (char *)buf_; 511 char *buf = (char *)buf_;
386 char *pos = buf;
387 int amt = 0;
388 512
389 if (destroyed () || !buf) 513 if (destroyed () || !buf)
390 return; 514 return;
391 515
392 if (len + outputbuffer.len > SOCKETBUFSIZE) 516 if (len + outputbuffer.len > SOCKETBUFSIZE)
393 { 517 {
394 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); 518 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
395 destroy (); 519 // shutdown the socket, this is safer than destroying it immediately
520 // as lots of code in the callchain might still access the map etc.
521 shutdown (fd, SHUT_RDWR);
396 return; 522 return;
397 } 523 }
398 524
399 int avail, end; 525 int avail, end;
400 526
… …
428client::send_packet (packet &sl) 554client::send_packet (packet &sl)
429{ 555{
430 if (destroyed ()) 556 if (destroyed ())
431 return; 557 return;
432 558
433 if (sl.length () >= MAXSOCKBUF) 559 if (sl.length () > MAXSOCKBUF)
434 { 560 {
435 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 561 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
436 /* Almost certainly we've overflowed a buffer, so quit now to make 562 /* Almost certainly we've overflowed a buffer, so quit now to make
437 * it easier to debug. 563 * it easier to debug.
438 */ 564 */
… …
440 } 566 }
441 567
442 if (!sl.length ()) 568 if (!sl.length ())
443 return; 569 return;
444 570
571 if (ws_version == 8)
572 {
573 static uint8 buf [MAXSOCKBUF * 2 + 4];
574
575 uint8 *b = buf + 4;
576 for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a)
577 {
578 if (*a < 0x80)
579 *b++ = *a;
580 else
581 {
582 *b++ = 0xc0 | ((*a >> 6) & 0x1f);
583 *b++ = 0x80 | ( *a & 0x3f);
584 }
585 }
586
587 assert (b - buf < sizeof (buf));
588
589 int l = b - (buf + 4);
590
591 if (l < 126)
592 {
593 buf [2] = 0x81;
594 buf [3] = l;
595
596 send (buf + 2, l + 2);
597 }
598 else
599 {
600 buf [0] = 0x81;
601 buf [1] = 126;
602 buf [2] = l >> 8;
603 buf [3] = l;
604
605 send (buf, l + 4);
606 }
607 }
608 else if (ws_version == 13)
609 {
610 int l = sl.length ();
611
612 if (l < 126)
613 {
614 uint8 hdr [] = { 0x82, l };
615 send (hdr, sizeof (hdr));
616 }
617 else
618 {
619 uint8 hdr [] = { 0x82, 126, l >> 8, l };
620 send (hdr, sizeof (hdr));
621 }
622
623 send (sl.buf_ + sl.hdrlen, l);
624 }
625 else
626 {
445 assert (sl.hdrlen == 2); 627 assert (sl.hdrlen == 2);
446 628
447 sl.buf_ [0] = sl.length () >> 8; 629 sl.buf_ [0] = sl.length () >> 8;
448 sl.buf_ [1] = sl.length () ; 630 sl.buf_ [1] = sl.length () ;
449 631
450 send (sl.buf_, sl.length () + sl.hdrlen); 632 send (sl.buf_, sl.length () + sl.hdrlen);
633 }
451} 634}
452 635
453void 636void
454client::send_packet (const char *buf, int len) 637client::send_packet (const char *buf, int len)
455{ 638{
… …
476 va_end (ap); 659 va_end (ap);
477 660
478 send_packet (sl); 661 send_packet (sl);
479} 662}
480 663
664void
665client::send_msg (int color, const char *type, const char *msg)
666{
667 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
668 {
669 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
670 return;
671 }
672
673 int len = strlen (msg);
674
675 if (!(color & NDI_VERBATIM)
676 && (msg_is_special (msg)
677 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
678 cfperl_send_msg (this, color, type, msg);
679 else
680 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
681}
682
683void
684client::send_drawinfo (const char *msg, int flags)
685{
686 send_msg (flags, "log", msg);
687}
688
481/*********************************************************************** 689/***********************************************************************
482 * 690 *
483 * packet functions/utilities 691 * packet functions/utilities
484 * 692 *
485 **********************************************************************/ 693 **********************************************************************/
… …
491 int len = strlen (name); 699 int len = strlen (name);
492 memcpy (cur, name, len); cur += len; 700 memcpy (cur, name, len); cur += len;
493 *cur++ = ' '; 701 *cur++ = ' ';
494} 702}
495 703
704packet &packet::operator <<(const ber32 v)
705{
706 enum { maxlen = 32 / 7 + 1 };
707 uint8 buf[maxlen];
708 uint8 *p = buf + maxlen;
709 uint32 val = v.val;
710
711 *--p = val & 0x7F;
712
713 while (val > 0x7F)
714 {
715 val >>= 7;
716 *--p = (val & 0x7F) | 0x80;
717 }
718
719 return *this << data (p, buf + maxlen - p);
720}
721
496packet &packet::operator <<(const data &v) 722packet &packet::operator <<(const data &v)
497{ 723{
498 if (room () < v.len) 724 if (room () < v.len)
499 reset (); 725 reset ();
500 else 726 else
… …
537 return reset (); 763 return reset ();
538 764
539 cur += len; 765 cur += len;
540} 766}
541 767
542/******************************************************************************
543 *
544 * statistics logging functions.
545 *
546 ******************************************************************************/
547
548#ifdef CS_LOGSTATS
549
550/* cst_tot is for the life of the server, cst_last is for the last series of
551 * stats
552 */
553CS_Stats cst_tot, cst_lst;
554
555/**
556 * Writes out the gathered stats. We clear cst_lst.
557 */
558void
559write_cs_stats (void)
560{
561 time_t now = time (NULL);
562
563 /* If no connections recently, don't both to log anything */
564 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
565 return;
566
567 /* CSSTAT is put in so scripts can easily find the line */
568 LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
569 ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
570 now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
571 cst_lst.ibytes = 0;
572 cst_lst.obytes = 0;
573 cst_lst.time_start = now;
574}
575#endif
576

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