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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC vs.
Revision 1.101 by root, Sat Dec 1 20:22:13 2018 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 (©) 2018 Marc Alexander Lehmann / the Deliantra team
5 * Copyright (©) 1992,2007 Frank Tore Johansen 5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
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 it under
8 * it under the terms of the GNU General Public License as published by 8 * the terms of the Affero GNU General Public License as published by the
9 * the Free Software Foundation, either version 3 of the License, or 9 * Free Software Foundation, either version 3 of the License, or (at your
10 * (at your option) any later version. 10 * 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,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 Affero GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 * and the GNU General Public License along with this program. If not, see
19 * <http://www.gnu.org/licenses/>.
19 * 20 *
20 * The authors can be reached via e-mail to <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <support@deliantra.net>
21 */ 22 */
22 23
23using namespace std; 24using namespace std;
24 25
25#include <global.h> 26#include <global.h>
… …
31# include <sys/socket.h> 32# include <sys/socket.h>
32# include <netinet/in.h> 33# include <netinet/in.h>
33# include <netinet/tcp.h> 34# include <netinet/tcp.h>
34#endif 35#endif
35 36
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, 37// force a packet when idle for more than this many seconds,
40// forcing an ack regularly. 38// forcing an ack regularly.
41#define IDLE_PING 2. 39#define IDLE_PING 2.
42 40
43void 41void
44client::flush () 42client::flush ()
45{ 43{
46 if (destroyed ()) 44 if (destroyed ())
47 return; 45 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 struct tcp_info tcpi;
56 socklen_t len = sizeof (tcpi);
57
58 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
59 {
60 if (tcpi.tcpi_snd_mss)
61 mss = tcpi.tcpi_snd_mss;
62
63 rtt = tcpi.tcpi_rtt;
64 rttvar = tcpi.tcpi_rttvar;
65
66 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
67 {
68 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
69 write_outputbuffer ();
70
71 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
72 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
73 destroy ();
74 }
75 }
76 }
77#endif
78 46
79 /** 47 /**
80 * Writes data to socket. 48 * Writes data to socket.
81 * 49 *
82 * When the socket is clear to write, and we have backlogged data, this 50 * When the socket is clear to write, and we have backlogged data, this
83 * is called to write it out. 51 * is called to write it out.
84 */ 52 */
85 53
86 // write a nop to the socket at least every IDLE_NOP seconds. 54 // write a nop to the socket at least every IDLE_PING seconds.
87 if (!outputbuffer.len) 55 if (!outputbuffer.len)
88 { 56 {
89 if (last_send + IDLE_PING <= NOW && pl && pl->active) 57 if (last_send + IDLE_PING <= NOW && pl && pl->active)
90 { 58 {
91 // this is a bit ugly, but map1/map1a seem to be the only 59 // this is a bit ugly, but map1a seems to be the only
92 // nop'able commands and they are quite small. 60 // nop'able command and it is quite small.
93 packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); 61 packet sl ("map1a");
94 send_packet (sl); 62 send_packet (sl);
95 } 63 }
96 else 64 else
97 return; 65 return;
98 } 66 }
99 67
100 if (socket_ev.poll () & PE_W) 68 if (socket_ev.poll () & EV_WRITE)
101 return; 69 return;
102 70
103 last_send = NOW; 71 last_send = NOW;
104 write_outputbuffer (); 72 write_outputbuffer ();
105} 73}
… …
132 // just retry 100 // just retry
133 } 101 }
134 else if (errno == EAGAIN) 102 else if (errno == EAGAIN)
135 { 103 {
136 // delay till ready 104 // delay till ready
137 socket_ev.poll (socket_ev.poll () | PE_W); 105 socket_ev.poll (socket_ev.poll () | EV_WRITE);
138 socket_ev.start (); 106 socket_ev.start ();
139 return; 107 return;
140 } 108 }
141 else 109 else
142 { 110 {
… …
144 destroy (); 112 destroy ();
145 return; 113 return;
146 } 114 }
147 } 115 }
148 116
149 socket_ev.poll (socket_ev.poll () & ~PE_W); 117 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
150} 118}
151 119
152/****************************************************************************** 120/******************************************************************************
153 * 121 *
154 * Start of read routines. 122 * Start of read routines.
… …
165 if (inbuf_len >= 2 + pkt_len) 133 if (inbuf_len >= 2 + pkt_len)
166 return 2 + pkt_len; 134 return 2 + pkt_len;
167 135
168 if (inbuf_len == sizeof (inbuf)) 136 if (inbuf_len == sizeof (inbuf))
169 { 137 {
170 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); 138 send_packet_printf ("msg %d log input buffer overflow - closing connection.", NDI_RED | NDI_REPLY);
171 destroy (); 139 destroy ();
172 return -1; 140 return -1;
173 } 141 }
174 } 142 }
175 143
… …
183 memmove (inbuf, inbuf + len, inbuf_len); 151 memmove (inbuf, inbuf + len, inbuf_len);
184} 152}
185 153
186/***************************************************************************** 154/*****************************************************************************
187 * Start of command dispatch area. 155 * Start of command dispatch area.
188 * The commands here are protocol commands. 156 * The commands here are protocol commands.
189 ****************************************************************************/ 157 ****************************************************************************/
190 158
191// SocketCommand, PlayingCommand, should not exist with those ugly casts 159// SocketCommand, PlayingCommand, should not exist with those ugly casts
192#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 160#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
193#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | 161#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
162
163static void
164NopCmd (char *, int, client *)
165{
166 // do nothing
167}
194 168
195/** 169/**
196 * Dispatch table for the server. 170 * Dispatch table for the server.
197 */ 171 */
198static struct packet_type packets[] = { 172static struct packet_type packets[] = {
199 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
200 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, 173 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND },
201 174
202 {"examine", PC(ExamineCmd) PF_PLAYING }, 175 {"examine", PC(ExamineCmd) PF_PLAYING },
203 {"ex", PC(ExCmd) PF_PLAYING }, 176 {"ex", PC(ExCmd) PF_PLAYING },
204 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
205 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
206 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
207 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
208 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
209 {"ext", PC(ExtCmd) 0 }, // CF+ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
210 {"mapredraw", PC(MapRedrawCmd) 0 }, 183 {"mapredraw", PC(MapRedrawCmd) 0 },
211 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
212 185
213 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
214 {"exti", SC(ExtiCmd) 0 }, // CF+ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
215 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
216 {"askface", SC(AskFaceCmd) 0 }, 189 {"askface", SC(AskFaceCmd) 0 },
217 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
218 {"setfacemode", SC(SetFaceMode) 0 },
219 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
220 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
221 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
222 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
223 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
224 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
225}; 196};
226 197
227bool 198bool
228client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
229{ 200{
230 return (!(pkt->flags & PF_PLAYER) || pl) 201 return (!(pkt->flags & PF_PLAYER) || pl)
231 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); 202 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
232} 203}
233 204
234// HACK: some commands currently should be executed 205// HACK: some commands currently should be executed
235// even when the player is frozen. this hack detects 206// even when the player is frozen. this hack detects
236// those commands. it should be folded into may_execute, 207// those commands. it should be folded into may_execute,
237// but kept seperate to emphasise the hack aspect, i.e. 208// but kept seperate to emphasise the hack aspect, i.e.
238// do it better, then remove. 209// do it better, then remove.
239static bool 210static bool
240always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) 211always_immediate (const client *ns, const packet_type *pkt, const char *data, int len)
241{ 212{
242 if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) 213 if (!(pkt->flags & PF_COMMAND))
243 return false; 214 return false;
244 215
245 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) 216 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
246 return false; 217 return false;
247 218
248 if (pkt->flags & PF_COMMAND6) 219 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
249 { 220 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
250 data += 6; 221 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
251 len -= 6; 222 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
252 } 223 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
253 224
254 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len == 7 && !strcmp (data, "suicide")) return true;
255 return true;
256 if (len > 5 && !strncmp (data, "chat ", 5))
257 return true;
258 226
259 return false; 227 return false;
260} 228}
261 229
262void 230void
… …
264{ 232{
265 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 233 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
266 { 234 {
267 //TODO: only one format 235 //TODO: only one format
268 if (pkt->flags & PF_PLAYER) 236 if (pkt->flags & PF_PLAYER)
237 {
269 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 238 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
239 pl->need_updated_stats ();
240 }
270 else 241 else
271 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 242 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
272 } 243 }
273 else 244 else
274 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 245 send_packet_printf ("msg %d log ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
275} 246}
276 247
277bool 248bool
278client::handle_packet () 249client::handle_packet ()
279{ 250{
… …
287 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 258 pl && pl->ob ? &pl->ob->name : "[anonymous]");
288 destroy (); 259 destroy ();
289 return false; 260 return false;
290 } 261 }
291 262
263 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
292 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 264 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
293 265
294 /* First, break out beginning word. There are at least 266 /* First, break out beginning word. There are at least
295 * a few commands that do not have any paremeters. If 267 * a few commands that do not have any paremeters. If
296 * we get such a command, don't worry about trying 268 * we get such a command, don't worry about trying
297 * to break it up. 269 * to break it up.
… …
308 { 280 {
309 data = (char *)inbuf + 2; // better read garbage than segfault 281 data = (char *)inbuf + 2; // better read garbage than segfault
310 datalen = 0; 282 datalen = 0;
311 } 283 }
312 284
313 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) 285 for (packet_type *pkt = packets; pkt < packets + ecb_array_length (packets); ++pkt)
314 if (!strcmp ((char *)inbuf + 2, pkt->name)) 286 if (!strcmp ((char *)inbuf + 2, pkt->name))
315 { 287 {
316 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 288 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
317 queue_command (pkt, data, datalen); 289 queue_command (pkt, data, datalen);
318 else 290 else
… …
320 292
321 goto next_packet; 293 goto next_packet;
322 } 294 }
323 295
324 // If we get here, we didn't find a valid command. 296 // If we get here, we didn't find a valid command.
325 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 297 send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
298
326next_packet: 299next_packet:
300 inbuf [pkt_len] = save_byte; // rather ugly
327 skip_packet (pkt_len); 301 skip_packet (pkt_len);
328 302
329 // input buffer has space again 303 // input buffer has space again
330 socket_ev.poll (socket_ev.poll () | PE_R); 304 socket_ev.poll (socket_ev.poll () | EV_READ);
331 305
332 return true; 306 return true;
333} 307}
334 308
309void
310client::inbuf_handle ()
311{
312 if (!handle_packet ())
313 return;
314
315 while (handle_packet ())
316 ;
317
318 flush ();
319}
320
335// callback called when socket is either readable or writable 321// callback called when socket is either readable or writable
336void 322void
337client::socket_cb (iow &w, int got) 323client::socket_cb (iow &w, int revents)
338{ 324{
339 //TODO remove when we have better socket cleanup logic 325 //TODO remove when we have better socket cleanup logic
340 if (destroyed ()) 326 if (destroyed ())
341 { 327 {
342 socket_ev.poll (0); 328 socket_ev.poll (0);
343 return; 329 return;
344 } 330 }
345 331
346 if (got & PE_W) 332 if (revents & EV_WRITE)
347 { 333 {
348 write_outputbuffer (); 334 write_outputbuffer ();
349 335
350 if (!outputbuffer.len) 336 if (!outputbuffer.len)
351 socket_ev.poll (socket_ev.poll () & ~PE_W); 337 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
352 }
353
354 if (got & PE_R)
355 { 338 }
356 //TODO: rate-limit tcp connection in better ways, important
357 339
340 if (revents & EV_READ)
341 {
342 int amount;
343 uint8 *rbuf;
344
345 if (ws_version)
346 {
347 if (ws_inbuf_len + 2048 > ws_inbuf_alloc)
348 ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096);
349
350 rbuf = ws_inbuf + ws_inbuf_len;
351 amount = ws_inbuf_alloc - ws_inbuf_len;
352 }
353 else
354 {
355 rbuf = inbuf + inbuf_len;
358 int amount = sizeof (inbuf) - inbuf_len; 356 amount = sizeof (inbuf) - inbuf_len;
357 }
359 358
360 if (!amount) 359 if (!amount)
361 { 360 {
362 // input buffer full 361 // input buffer full
363 socket_ev.poll (socket_ev.poll () & ~PE_R); 362 LOG (llevError, "input buffer overflow.");
363 destroy ();
364 return; 364 return;
365 } 365 }
366 366
367 amount = read (fd, inbuf + inbuf_len, amount); 367 amount = read (fd, rbuf, amount);
368 368
369 if (!amount) 369 if (!amount)
370 { 370 {
371 destroy (); 371 destroy ();
372 return; 372 return;
… …
380 return; 380 return;
381 } 381 }
382 382
383 // should not be here, normally 383 // should not be here, normally
384 } 384 }
385
386 if (ws_version)
387 {
388 ws_inbuf_len += amount;
389
390 while (ws_inbuf_len)
391 {
392 if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask
393 break;
394
395 int d = 2;
396 int fin = ws_inbuf [0] & 0x80;
397 int op = ws_inbuf [0] & 0x0f;
398 int len = ws_inbuf [1] & 0x7f;
399
400 if (len == 126)
401 {
402 len = (ws_inbuf [2] << 8) | ws_inbuf [3];
403 d += 2;
404 }
405 else if (len == 127)
406 {
407 if (ws_inbuf_len < 2 + 8)
408 return;
409
410 // we don't do extra long frames, if a browser wants to send >2**32 bytes,
411 // there are bigger issues to fix.
412 len = (ws_inbuf [8] << 8) | ws_inbuf [9];
413 d += 8;
414 }
415
416 // we only continue if we have a complete frame
417 if (ws_inbuf_len < d + 4 + len)
418 return;
419
420 switch (op)
421 {
422 case 0: op = ws_inbuf_type; break; // continuation
423 case 1: ws_inbuf_type = 1; break; // utf-8
424 case 2: ws_inbuf_type = 2; break; // binary
425 }
426
427 if (len > sizeof (inbuf) - inbuf_len)
428 {
429 // input buffer full
430 LOG (llevError, "input buffer overflow (ws).");
431 destroy ();
432 return;
433 }
434
435 uint8 *buf = inbuf + inbuf_len + 2;
436
437 for (int i = 0; i < len; ++i)
438 buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)];
439
440 // remove frame
441 ws_inbuf_len -= d + 4 + len;
442 memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len);
443
444 switch (op)
445 {
446 case 1: // utf-8
447 // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases
448 // but we assume that these extra-long packets will be rare.
449 {
450 uint8 *a = buf;
451 uint8 *b = a;
452 uint8 *c = a + len;
453
454 for (; a < c; ++a, ++b)
455 {
456 *b = *a;
457
458 if (*a >= 0x80)
459 *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a;
460 }
461
462 len -= a - b;
463 }
464 /* FALLTHROUGH */
465 case 2: // binary
466 inbuf_len += len;
467
468 if (fin)
469 {
470 inbuf [0] = inbuf_len >> 8;
471 inbuf [1] = inbuf_len;
472
473 inbuf_len += 2;
474
475 inbuf_handle ();
476 }
477 break;
478
479 case 9: // ping
480 {
481 // send pong - we assume ping messages are <64k
482 // as we can't handle >10k at the moment anyway.
483 uint8 hdr [] = { 0x8a, 126, len >> 8, len };
484 send (hdr, sizeof (hdr));
485 send (inbuf + inbuf_len, len);
486 }
487 break;
488
489 case 10: // pong
490 break;
491
492 case 8: // close
493 default:
494 destroy ();
495 return;
496 }
497 }
498 }
385 else 499 else
386 { 500 {
387 inbuf_len += amount; 501 inbuf_len += amount;
388 502 inbuf_handle ();
389 cmd_ev.start ();
390 } 503 }
391 } 504 }
392}
393
394// called whenever we have additional commands to process
395void
396client::cmd_cb (iw &w)
397{
398 if (handle_packet ())
399 w.start ();
400 else
401 flush ();
402} 505}
403 506
404/******************************************************************************* 507/*******************************************************************************
405 * 508 *
406 * Start of write related routines. 509 * Start of write related routines.
… …
462client::send_packet (packet &sl) 565client::send_packet (packet &sl)
463{ 566{
464 if (destroyed ()) 567 if (destroyed ())
465 return; 568 return;
466 569
467 if (sl.length () >= MAXSOCKBUF) 570 if (sl.length () > MAXSOCKBUF)
468 { 571 {
469 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 572 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
470 /* Almost certainly we've overflowed a buffer, so quit now to make 573 /* Almost certainly we've overflowed a buffer, so quit now to make
471 * it easier to debug. 574 * it easier to debug.
472 */ 575 */
… …
474 } 577 }
475 578
476 if (!sl.length ()) 579 if (!sl.length ())
477 return; 580 return;
478 581
582 if (ws_version == 8)
583 {
584 static uint8 buf [MAXSOCKBUF * 2 + 4];
585
586 uint8 *b = buf + 4;
587 for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a)
588 {
589 if (*a < 0x80)
590 *b++ = *a;
591 else
592 {
593 *b++ = 0xc0 | ((*a >> 6) & 0x1f);
594 *b++ = 0x80 | ( *a & 0x3f);
595 }
596 }
597
598 assert (b - buf < sizeof (buf));
599
600 int len = b - (buf + 4);
601
602 if (len < 126)
603 {
604 buf [2] = 0x81;
605 buf [3] = len;
606
607 send (buf + 2, len + 2);
608 }
609 else
610 {
611 buf [0] = 0x81;
612 buf [1] = 126;
613 buf [2] = len >> 8;
614 buf [3] = len;
615
616 send (buf, len + 4);
617 }
618 }
619 else if (ws_version == 13)
620 {
621 int len = sl.length ();
622
623 if (len < 126)
624 {
625 uint8 hdr [] = { 0x82, len };
626 send (hdr, sizeof (hdr));
627 }
628 else
629 {
630 uint8 hdr [] = { 0x82, 126, len >> 8, len };
631 send (hdr, sizeof (hdr));
632 }
633
634 send (sl.buf_ + sl.hdrlen, len);
635 }
636 else
637 {
479 assert (sl.hdrlen == 2); 638 assert (sl.hdrlen == 2);
480 639
481 sl.buf_ [0] = sl.length () >> 8; 640 sl.buf_ [0] = sl.length () >> 8;
482 sl.buf_ [1] = sl.length () ; 641 sl.buf_ [1] = sl.length () ;
483 642
484 send (sl.buf_, sl.length () + sl.hdrlen); 643 send (sl.buf_, sl.length () + sl.hdrlen);
644 }
485} 645}
486 646
487void 647void
488client::send_packet (const char *buf, int len) 648client::send_packet (const char *buf, int len)
489{ 649{
490 packet sl; 650 packet sl;
491 651
492 sl << data (buf, len); 652 sl << data_n (buf, len);
493 send_packet (sl); 653 send_packet (sl);
494} 654}
495 655
496void 656void
497client::send_packet (const char *buf) 657client::send_packet (const char *buf)
… …
510 va_end (ap); 670 va_end (ap);
511 671
512 send_packet (sl); 672 send_packet (sl);
513} 673}
514 674
515// returns true when the message needs special (read: perl) treatment
516static bool
517msg_is_special (const char *msg)
518{
519 return msg [strcspn (msg, "<[&\n")];
520}
521
522void 675void
523client::send_msg (int color, const char *type, const char *msg) 676client::send_msg (int color, const char *type, const char *msg)
524{ 677{
678 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
679 {
680 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
681 return;
682 }
683
684 int len = strlen (msg);
685
686 if (!(color & NDI_VERBATIM)
525 if (msg_is_special (msg)) 687 && (msg_is_special (msg)
688 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
526 cfperl_send_msg (this, color, type, msg); 689 cfperl_send_msg (this, color, type, msg);
527 else if (can_msg)
528 send_packet_printf ("msg %d %s %s", color, type, msg);
529 else if (color < 0)
530 return; // client cannot handle this
531 else 690 else
532 send_packet_printf ("drawinfo %d %s", color, msg); 691 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
533}
534
535void
536client::send_drawinfo (const char *msg, int flags)
537{
538 send_msg (flags, "log", msg);
539} 692}
540 693
541/*********************************************************************** 694/***********************************************************************
542 * 695 *
543 * packet functions/utilities 696 * packet functions/utilities
… …
553 *cur++ = ' '; 706 *cur++ = ' ';
554} 707}
555 708
556packet &packet::operator <<(const ber32 v) 709packet &packet::operator <<(const ber32 v)
557{ 710{
558 enum { maxlen = 32 / 7 + 1}; 711 enum { maxlen = 32 / 7 + 1 };
559 uint8 buf[maxlen]; 712 uint8 buf[maxlen];
560 uint8 *p = buf + maxlen; 713 uint8 *p = buf + maxlen;
561 uint32 val = v.val; 714 uint32 val = v.val;
562 715
563 *--p = val & 0x7F; 716 *--p = val & 0x7F;
… …
566 { 719 {
567 val >>= 7; 720 val >>= 7;
568 *--p = (val & 0x7F) | 0x80; 721 *--p = (val & 0x7F) | 0x80;
569 } 722 }
570 723
571 return *this << data (p, buf + maxlen - p); 724 return *this << data_n (p, buf + maxlen - p);
572} 725}
573 726
574packet &packet::operator <<(const data &v) 727packet &packet::operator <<(const data_n &v)
575{ 728{
576 if (room () < v.len) 729 if (room () < v.len)
577 reset (); 730 reset ();
578 else 731 else
579 { 732 {
… …
588} 741}
589 742
590packet &packet::operator <<(const data8 &v) 743packet &packet::operator <<(const data8 &v)
591{ 744{
592 unsigned int len = min (v.len, 0x00FF); 745 unsigned int len = min (v.len, 0x00FF);
593 return *this << uint8 (len) << data (v.ptr, len); 746 return *this << uint8 (len) << data_n (v.ptr, len);
594} 747}
595 748
596packet &packet::operator <<(const data16 &v) 749packet &packet::operator <<(const data16 &v)
597{ 750{
598 unsigned int len = min (v.len, 0xFFFF); 751 unsigned int len = min (v.len, 0xFFFF);
599 return *this << uint16 (len) << data (v.ptr, len); 752 return *this << uint16 (len) << data_n (v.ptr, len);
600} 753}
601 754
602packet &packet::operator <<(const char *v) 755packet &packet::operator <<(const char *v)
603{ 756{
604 return *this << data (v, strlen (v ? v : 0)); 757 return *this << data_n (v, v ? strlen (v) : 0);
605} 758}
606 759
607void 760void
608packet::vprintf (const char *format, va_list ap) 761packet::vprintf (const char *format, va_list ap)
609{ 762{

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