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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.24 by root, Sat Dec 16 17:16:52 2006 UTC vs.
Revision 1.99 by root, Thu Jan 19 21:18:34 2017 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) 1992 Frank Tore Johansen 4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 5 *
6 This program is free software; you can redistribute it and/or modify 6 * Deliantra is free software: you can redistribute it and/or modify it under
7 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
8 the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
9 (at your option) any later version. 9 * option) any later version.
10 10 *
11 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,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details. 14 * GNU General Public License for more details.
15 15 *
16 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
17 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
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
19
20 The author can be reached via e-mail to mark@pyramid.com
21*/
22
23/**
24 * \file
25 * Low-level socket-related functions.
26 * 19 *
27 * \date 2003-12-02 20 * The authors can be reached via e-mail to <support@deliantra.net>
28 *
29 * Contains some base functions that both the client and server
30 * can use. As such, depending what we are being compiled for will
31 * determine what we can include. the client is designed have
32 * CFCLIENT defined as part of its compile flags.
33 */ 21 */
34 22
35using namespace std; 23using namespace std;
36 24
37#include <global.h> 25#include <global.h>
38#include <sproto.h> 26#include <sproto.h>
39#include <cstdarg> 27#include <cstdarg>
40 28
41#ifdef __linux__ 29#if HAVE_TCP_INFO
42# include <sys/types.h> 30# include <sys/types.h>
43# include <sys/socket.h> 31# include <sys/socket.h>
44# include <netinet/in.h> 32# include <netinet/in.h>
45# define TCP_HZ 1000 // sorry...
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 38#define IDLE_PING 2.
52#define SOCKET_TIMEOUT2 20
53 39
54void 40void
55client::flush () 41client::flush ()
56{ 42{
57#ifdef __linux__ 43 if (destroyed ())
58 // check time of last ack, and, if too old, kill connection 44 return;
59 struct tcp_info tcpi;
60 socklen_t len = sizeof (tcpi);
61
62 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
63 {
64 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
65
66 rtt = tcpi.tcpi_rtt;
67 rttvar = tcpi.tcpi_rttvar;
68
69 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s
70 && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
71 {
72 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
73 (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
74 destroy ();
75 }
76 }
77#endif
78 45
79 /** 46 /**
80 * Writes data to socket. 47 * Writes data to socket.
81 * 48 *
82 * 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
83 * is called to write it out. 50 * is called to write it out.
84 */ 51 */
85 52
86 if (!outputbuffer.len || socket_ev.poll () & PE_W) 53 // write a nop to the socket at least every IDLE_PING 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)
87 return; 68 return;
88 69
70 last_send = NOW;
89 write_outputbuffer (); 71 write_outputbuffer ();
90} 72}
91 73
92void 74void
93client::write_outputbuffer () 75client::write_outputbuffer ()
… …
103 /* wrap back to start of buffer */ 85 /* wrap back to start of buffer */
104 if (outputbuffer.start == SOCKETBUFSIZE) 86 if (outputbuffer.start == SOCKETBUFSIZE)
105 outputbuffer.start = 0; 87 outputbuffer.start = 0;
106 88
107 outputbuffer.len -= res; 89 outputbuffer.len -= res;
108#ifdef CS_LOGSTATS
109 cst_tot.obytes += res;
110 cst_lst.obytes += res;
111#endif
112 } 90 }
113 else if (res == 0) 91 else if (res == 0)
114 { 92 {
115 LOG (llevError, "socket write failed, connection closed.\n"); 93 LOG (llevError, "socket write failed, connection closed.\n");
116 destroy (); 94 destroy ();
… …
121 // just retry 99 // just retry
122 } 100 }
123 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
124 { 102 {
125 // delay till ready 103 // delay till ready
126 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
127 socket_ev.start (); 105 socket_ev.start ();
128 return; 106 return;
129 } 107 }
130 else 108 else
131 { 109 {
… …
133 destroy (); 111 destroy ();
134 return; 112 return;
135 } 113 }
136 } 114 }
137 115
138 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
139} 117}
140 118
141/****************************************************************************** 119/******************************************************************************
142 * 120 *
143 * Start of read routines. 121 * Start of read routines.
… …
154 if (inbuf_len >= 2 + pkt_len) 132 if (inbuf_len >= 2 + pkt_len)
155 return 2 + pkt_len; 133 return 2 + pkt_len;
156 134
157 if (inbuf_len == sizeof (inbuf)) 135 if (inbuf_len == sizeof (inbuf))
158 { 136 {
159 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); 137 send_packet_printf ("msg %d log input buffer overflow - closing connection.", NDI_RED | NDI_REPLY);
160 destroy (); 138 destroy ();
161 return -1; 139 return -1;
162 } 140 }
163 } 141 }
164 142
… …
172 memmove (inbuf, inbuf + len, inbuf_len); 150 memmove (inbuf, inbuf + len, inbuf_len);
173} 151}
174 152
175/***************************************************************************** 153/*****************************************************************************
176 * Start of command dispatch area. 154 * Start of command dispatch area.
177 * The commands here are protocol commands. 155 * The commands here are protocol commands.
178 ****************************************************************************/ 156 ****************************************************************************/
179 157
180// SocketCommand, PlayingCommand, should not exist with those ugly casts 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
181#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
182#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 |
161
162static void
163NopCmd (char *, int, client *)
164{
165 // do nothing
166}
183 167
184/** 168/**
185 * Dispatch table for the server. 169 * Dispatch table for the server.
186 */ 170 */
187static struct packet_type packets[] = { 171static struct packet_type packets[] = {
188 {"ncom", PC(NewPlayerCmd) PF_PLAYING },
189 {"command", PC(PlayerCmd) PF_PLAYING }, 172 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND },
190 173
191 {"examine", PC(ExamineCmd) PF_PLAYING }, 174 {"examine", PC(ExamineCmd) PF_PLAYING },
175 {"ex", PC(ExCmd) PF_PLAYING },
192 {"apply", PC(ApplyCmd) PF_PLAYING }, 176 {"apply", PC(ApplyCmd) PF_PLAYING },
193 {"reply", PC(ReplyCmd) PF_IMMEDIATE },
194 {"lookat", PC(LookAt) PF_PLAYING }, 177 {"lookat", PC(LookAt) PF_PLAYING },
195 {"lock", PC(LockItem) PF_PLAYING }, 178 {"lock", PC(LockItem) PF_PLAYING },
196 {"mark", PC(MarkItem) PF_PLAYING }, 179 {"mark", PC(MarkItem) PF_PLAYING },
197 {"move", PC(MoveCmd) PF_PLAYING }, 180 {"move", PC(MoveCmd) PF_PLAYING },
198 {"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
199 {"ext", PC(ExtCmd) 0 }, /* CF+ */ 181 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
200 {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */ 182 {"mapredraw", PC(MapRedrawCmd) 0 },
201 {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ 183 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
202 184
185 {"reply", SC(ReplyCmd) 0 },
186 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
203 {"addme", SC(AddMeCmd) PF_IMMEDIATE }, 187 {"addme", SC(AddMeCmd) 0 },
204 {"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */ 188 {"askface", SC(AskFaceCmd) 0 },
205 {"requestinfo", SC(RequestInfo) PF_IMMEDIATE }, 189 {"requestinfo", SC(RequestInfo) 0 },
206 {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
207 {"setsound", SC(SetSound) PF_IMMEDIATE }, 190 {"setsound", SC(SetSound) 0 },
208 {"setup", SC(SetUp) PF_IMMEDIATE }, 191 {"setup", SC(SetUp) 0 },
209 {"version", SC(VersionCmd) PF_IMMEDIATE }, 192 {"version", SC(VersionCmd) 0 },
210 {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */ 193
211 {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */ 194 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
212 {"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /*Added: tchize (smoothing technologies) */
213}; 195};
214 196
215bool 197bool
216client::may_execute (const packet_type *pkt) const 198client::may_execute (const packet_type *pkt) const
217{ 199{
218 return (!(pkt->flags & PF_PLAYER) || pl) 200 return (!(pkt->flags & PF_PLAYER) || pl)
219 && (!(pkt->flags & PF_PLAYING) || (pl && pl->state == ST_PLAYING)); 201 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
202}
203
204// HACK: some commands currently should be executed
205// even when the player is frozen. this hack detects
206// those commands. it should be folded into may_execute,
207// but kept seperate to emphasise the hack aspect, i.e.
208// do it better, then remove.
209static bool
210always_immediate (const client *ns, const packet_type *pkt, const char *data, int len)
211{
212 if (!(pkt->flags & PF_COMMAND))
213 return false;
214
215 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
216 return false;
217
218 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
219 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
220 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
221 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
222 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
223
224 if (len == 7 && !strcmp (data, "suicide")) return true;
225
226 return false;
220} 227}
221 228
222void 229void
223client::execute (const packet_type *pkt, char *data, int datalen) 230client::execute (const packet_type *pkt, char *data, int datalen)
224{ 231{
225 if (may_execute (pkt)) 232 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
226 { 233 {
227 //TODO: only one format 234 //TODO: only one format
228 if (pkt->flags & PF_PLAYER) 235 if (pkt->flags & PF_PLAYER)
236 {
229 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); 237 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
238 pl->need_updated_stats ();
239 }
230 else 240 else
231 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 241 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
232 } 242 }
233 else 243 else
234 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); 244 send_packet_printf ("msg %d log ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
235} 245}
236 246
237bool 247bool
238client::handle_packet () 248client::handle_packet ()
239{ 249{
… …
247 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 257 pl && pl->ob ? &pl->ob->name : "[anonymous]");
248 destroy (); 258 destroy ();
249 return false; 259 return false;
250 } 260 }
251 261
262 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
252 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 263 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
253 264
254 /* First, break out beginning word. There are at least 265 /* First, break out beginning word. There are at least
255 * a few commands that do not have any paremeters. If 266 * a few commands that do not have any paremeters. If
256 * we get such a command, don't worry about trying 267 * we get such a command, don't worry about trying
257 * to break it up. 268 * to break it up.
… …
268 { 279 {
269 data = (char *)inbuf + 2; // better read garbage than segfault 280 data = (char *)inbuf + 2; // better read garbage than segfault
270 datalen = 0; 281 datalen = 0;
271 } 282 }
272 283
273 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) 284 for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
274 if (!strcmp ((char *)inbuf + 2, pkt->name)) 285 if (!strcmp ((char *)inbuf + 2, pkt->name))
275 { 286 {
276 if (pkt->flags & PF_IMMEDIATE) 287 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
288 queue_command (pkt, data, datalen);
289 else
277 execute (pkt, data, datalen); 290 execute (pkt, data, datalen);
278 else
279 queue_command (pkt, data, datalen);
280 291
281 goto next_packet; 292 goto next_packet;
282 } 293 }
283 294
284 /* If we get here, we didn't find a valid command. Logging 295 // If we get here, we didn't find a valid command.
285 * this might be questionable, because a broken client/malicious
286 * user could certainly send a whole bunch of invalid commands.
287 */
288 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); 296 send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
297
289next_packet: 298next_packet:
299 inbuf [pkt_len] = save_byte; // rather ugly
290 skip_packet (pkt_len); 300 skip_packet (pkt_len);
291 301
292 // input buffer has space again 302 // input buffer has space again
293 socket_ev.poll (socket_ev.poll () | PE_R); 303 socket_ev.poll (socket_ev.poll () | EV_READ);
294 304
295 return true; 305 return true;
296} 306}
297 307
308void
309client::inbuf_handle ()
310{
311 if (!handle_packet ())
312 return;
313
314 while (handle_packet ())
315 ;
316
317 flush ();
318}
319
298// callback called when socket is either readable or writable 320// callback called when socket is either readable or writable
299void 321void
300client::socket_cb (iow &w, int got) 322client::socket_cb (iow &w, int revents)
301{ 323{
302 //TODO remove when we have better socket cleanup logic 324 //TODO remove when we have better socket cleanup logic
303 if (status == Ns_Dead) 325 if (destroyed ())
304 { 326 {
305 socket_ev.poll (0); 327 socket_ev.poll (0);
306 return; 328 return;
307 } 329 }
308 330
309 if (got & PE_W) 331 if (revents & EV_WRITE)
310 { 332 {
311 write_outputbuffer (); 333 write_outputbuffer ();
312 334
313 if (!outputbuffer.len) 335 if (!outputbuffer.len)
314 socket_ev.poll (socket_ev.poll () & ~PE_W); 336 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
315 }
316
317 if (got & PE_R)
318 { 337 }
319 //TODO: rate-limit tcp connection in better ways, important
320 338
339 if (revents & EV_READ)
340 {
341 int amount;
342 uint8 *rbuf;
343
344 if (ws_version)
345 {
346 if (ws_inbuf_len + 2048 > ws_inbuf_alloc)
347 ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096);
348
349 rbuf = ws_inbuf + ws_inbuf_len;
350 amount = ws_inbuf_alloc - ws_inbuf_len;
351 }
352 else
353 {
354 rbuf = inbuf + inbuf_len;
321 int amount = sizeof (inbuf) - inbuf_len; 355 amount = sizeof (inbuf) - inbuf_len;
356 }
322 357
323 if (!amount) 358 if (!amount)
324 { 359 {
325 // input buffer full 360 // input buffer full
326 socket_ev.poll (socket_ev.poll () & ~PE_R); 361 LOG (llevError, "input buffer overflow.");
362 destroy ();
327 return; 363 return;
328 } 364 }
329 365
330 amount = read (fd, inbuf + inbuf_len, amount); 366 amount = read (fd, rbuf, amount);
331 367
332 if (!amount) 368 if (!amount)
333 { 369 {
334 destroy (); 370 destroy ();
335 return; 371 return;
… …
343 return; 379 return;
344 } 380 }
345 381
346 // should not be here, normally 382 // should not be here, normally
347 } 383 }
384
385 if (ws_version)
386 {
387 ws_inbuf_len += amount;
388
389 while (ws_inbuf_len)
390 {
391 if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask
392 break;
393
394 int d = 2;
395 int fin = ws_inbuf [0] & 0x80;
396 int op = ws_inbuf [0] & 0x0f;
397 int len = ws_inbuf [1] & 0x7f;
398
399 if (len == 126)
400 {
401 len = (ws_inbuf [2] << 8) | ws_inbuf [3];
402 d += 2;
403 }
404 else if (len == 127)
405 {
406 if (ws_inbuf_len < 2 + 8)
407 return;
408
409 // we don't do extra long frames, if a browser wants to send >2**32 bytes,
410 // there are bigger issues to fix.
411 len = (ws_inbuf [8] << 8) | ws_inbuf [9];
412 d += 8;
413 }
414
415 // we only continue if we have a complete frame
416 if (ws_inbuf_len < d + 4 + len)
417 return;
418
419 switch (op)
420 {
421 case 0: op = ws_inbuf_type; break; // continuation
422 case 1: ws_inbuf_type = 1; break; // utf-8
423 case 2: ws_inbuf_type = 2; break; // binary
424 }
425
426 if (len > sizeof (inbuf) - inbuf_len)
427 {
428 // input buffer full
429 LOG (llevError, "input buffer overflow (ws).");
430 destroy ();
431 return;
432 }
433
434 uint8 *buf = inbuf + inbuf_len + 2;
435
436 for (int i = 0; i < len; ++i)
437 buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)];
438
439 // remove frame
440 ws_inbuf_len -= d + 4 + len;
441 memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len);
442
443 switch (op)
444 {
445 case 1: // utf-8
446 // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases
447 // but we assume that these extra-long packets will be rare.
448 {
449 uint8 *a = buf;
450 uint8 *b = a;
451 uint8 *c = a + len;
452
453 for (; a < c; ++a, ++b)
454 {
455 *b = *a;
456
457 if (*a >= 0x80)
458 *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a;
459 }
460
461 len -= a - b;
462 }
463 /* FALLTHROUGH */
464 case 2: // binary
465 inbuf_len += len;
466
467 if (fin)
468 {
469 inbuf [0] = inbuf_len >> 8;
470 inbuf [1] = inbuf_len;
471
472 inbuf_len += 2;
473
474 inbuf_handle ();
475 }
476 break;
477
478 case 9: // ping
479 {
480 // send pong - we assume ping messages are <64k
481 // as we can't handle >10k at the moment anyway.
482 uint8 hdr [] = { 0x8a, 126, len >> 8, len };
483 send (hdr, sizeof (hdr));
484 send (inbuf + inbuf_len, len);
485 }
486 break;
487
488 case 10: // pong
489 break;
490
491 case 8: // close
492 default:
493 destroy ();
494 return;
495 }
496 }
497 }
348 else 498 else
349 { 499 {
350 inbuf_len += amount; 500 inbuf_len += amount;
351 501 inbuf_handle ();
352 cst_tot.ibytes += amount;
353 cst_lst.ibytes += amount;
354
355 cmd_ev.start ();
356 } 502 }
357 } 503 }
358}
359
360// called whenever we have additional commands to process
361void
362client::cmd_cb (iw &w)
363{
364 if (handle_packet () /*|| handle_command ()*/)//TODO: re-enable async command execution(?)
365 w.start ();
366 else
367 flush ();
368} 504}
369 505
370/******************************************************************************* 506/*******************************************************************************
371 * 507 *
372 * Start of write related routines. 508 * Start of write related routines.
… …
381 */ 517 */
382void 518void
383client::send (void *buf_, int len) 519client::send (void *buf_, int len)
384{ 520{
385 char *buf = (char *)buf_; 521 char *buf = (char *)buf_;
386 char *pos = buf;
387 int amt = 0;
388 522
389 if (status == Ns_Dead || !buf) 523 if (destroyed () || !buf)
390 return; 524 return;
391 525
392 if ((len + outputbuffer.len) > SOCKETBUFSIZE) 526 if (len + outputbuffer.len > SOCKETBUFSIZE)
393 { 527 {
394 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); 528 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
395 destroy (); 529 // shutdown the socket, this is safer than destroying it immediately
530 // as lots of code in the callchain might still access the map etc.
531 shutdown (fd, SHUT_RDWR);
396 return; 532 return;
397 } 533 }
398 534
399 int avail, end; 535 int avail, end;
400 536
… …
425 * shortcut function. 561 * shortcut function.
426 */ 562 */
427void 563void
428client::send_packet (packet &sl) 564client::send_packet (packet &sl)
429{ 565{
430 if (status == Ns_Dead) 566 if (destroyed ())
431 return; 567 return;
432 568
433 if (sl.length () >= MAXSOCKBUF) 569 if (sl.length () > MAXSOCKBUF)
434 { 570 {
435 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 571 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 572 /* Almost certainly we've overflowed a buffer, so quit now to make
437 * it easier to debug. 573 * it easier to debug.
438 */ 574 */
… …
440 } 576 }
441 577
442 if (!sl.length ()) 578 if (!sl.length ())
443 return; 579 return;
444 580
581 if (ws_version == 8)
582 {
583 static uint8 buf [MAXSOCKBUF * 2 + 4];
584
585 uint8 *b = buf + 4;
586 for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a)
587 {
588 if (*a < 0x80)
589 *b++ = *a;
590 else
591 {
592 *b++ = 0xc0 | ((*a >> 6) & 0x1f);
593 *b++ = 0x80 | ( *a & 0x3f);
594 }
595 }
596
597 assert (b - buf < sizeof (buf));
598
599 int len = b - (buf + 4);
600
601 if (len < 126)
602 {
603 buf [2] = 0x81;
604 buf [3] = len;
605
606 send (buf + 2, len + 2);
607 }
608 else
609 {
610 buf [0] = 0x81;
611 buf [1] = 126;
612 buf [2] = len >> 8;
613 buf [3] = len;
614
615 send (buf, len + 4);
616 }
617 }
618 else if (ws_version == 13)
619 {
620 int len = sl.length ();
621
622 if (len < 126)
623 {
624 uint8 hdr [] = { 0x82, len };
625 send (hdr, sizeof (hdr));
626 }
627 else
628 {
629 uint8 hdr [] = { 0x82, 126, len >> 8, len };
630 send (hdr, sizeof (hdr));
631 }
632
633 send (sl.buf_ + sl.hdrlen, len);
634 }
635 else
636 {
445 assert (sl.hdrlen == 2); 637 assert (sl.hdrlen == 2);
446 638
447 sl.buf_ [0] = sl.length () >> 8; 639 sl.buf_ [0] = sl.length () >> 8;
448 sl.buf_ [1] = sl.length () ; 640 sl.buf_ [1] = sl.length () ;
449 641
450 send (sl.buf_, sl.length () + sl.hdrlen); 642 send (sl.buf_, sl.length () + sl.hdrlen);
643 }
451} 644}
452 645
453void 646void
454client::send_packet (const char *buf, int len) 647client::send_packet (const char *buf, int len)
455{ 648{
… …
476 va_end (ap); 669 va_end (ap);
477 670
478 send_packet (sl); 671 send_packet (sl);
479} 672}
480 673
674void
675client::send_msg (int color, const char *type, const char *msg)
676{
677 if (!msg || !type) // it can happen (for example, missing attack messages cause this)
678 {
679 LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg);
680 return;
681 }
682
683 int len = strlen (msg);
684
685 if (!(color & NDI_VERBATIM)
686 && (msg_is_special (msg)
687 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
688 cfperl_send_msg (this, color, type, msg);
689 else
690 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
691}
692
481/*********************************************************************** 693/***********************************************************************
482 * 694 *
483 * packet functions/utilities 695 * packet functions/utilities
484 * 696 *
485 **********************************************************************/ 697 **********************************************************************/
698
699packet::packet (const char *name)
700{
701 reset ();
702
703 int len = strlen (name);
704 memcpy (cur, name, len); cur += len;
705 *cur++ = ' ';
706}
707
708packet &packet::operator <<(const ber32 v)
709{
710 enum { maxlen = 32 / 7 + 1 };
711 uint8 buf[maxlen];
712 uint8 *p = buf + maxlen;
713 uint32 val = v.val;
714
715 *--p = val & 0x7F;
716
717 while (val > 0x7F)
718 {
719 val >>= 7;
720 *--p = (val & 0x7F) | 0x80;
721 }
722
723 return *this << data (p, buf + maxlen - p);
724}
486 725
487packet &packet::operator <<(const data &v) 726packet &packet::operator <<(const data &v)
488{ 727{
489 if (room () < v.len) 728 if (room () < v.len)
490 reset (); 729 reset ();
… …
528 return reset (); 767 return reset ();
529 768
530 cur += len; 769 cur += len;
531} 770}
532 771
533/******************************************************************************
534 *
535 * statistics logging functions.
536 *
537 ******************************************************************************/
538
539#ifdef CS_LOGSTATS
540
541/* cst_tot is for the life of the server, cst_last is for the last series of
542 * stats
543 */
544CS_Stats cst_tot, cst_lst;
545
546/**
547 * Writes out the gathered stats. We clear cst_lst.
548 */
549void
550write_cs_stats (void)
551{
552 time_t now = time (NULL);
553
554 /* If no connections recently, don't both to log anything */
555 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
556 return;
557
558 /* CSSTAT is put in so scripts can easily find the line */
559 LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
560 ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
561 now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
562 cst_lst.ibytes = 0;
563 cst_lst.obytes = 0;
564 cst_lst.time_start = now;
565}
566#endif
567

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