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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.23 by root, Sat Dec 16 03:08:26 2006 UTC vs.
Revision 1.101 by root, Sat Dec 1 20:22:13 2018 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 (©) 2018 Marc Alexander Lehmann / the Deliantra team
5 5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6 This program is free software; you can redistribute it and/or modify 6 *
7 * 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 8 * 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 9 * Free Software Foundation, either version 3 of the License, or (at your
9 (at your option) any later version. 10 * option) any later version.
10 11 *
11 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,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details. 15 * GNU General Public License for more details.
15 16 *
16 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
17 along with this program; if not, write to the Free Software 18 * and the GNU General Public License along with this program. If not, see
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 * <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 * 20 *
27 * \date 2003-12-02 21 * 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 */ 22 */
34 23
35using namespace std; 24using namespace std;
36 25
37#include <global.h> 26#include <global.h>
38#include <sproto.h> 27#include <sproto.h>
39#include <cstdarg> 28#include <cstdarg>
40 29
41#ifdef __linux__ 30#if HAVE_TCP_INFO
42# include <sys/types.h> 31# include <sys/types.h>
43# include <sys/socket.h> 32# include <sys/socket.h>
44# include <netinet/in.h> 33# include <netinet/in.h>
45# define TCP_HZ 1000 // sorry...
46# include <netinet/tcp.h> 34# include <netinet/tcp.h>
47#endif 35#endif
48 36
49// use a really low timeout, as it doesn't cost any bandwidth, and you can 37// force a packet when idle for more than this many seconds,
50// easily die in 20 seconds... 38// forcing an ack regularly.
51#define SOCKET_TIMEOUT1 10 39#define IDLE_PING 2.
52#define SOCKET_TIMEOUT2 20
53 40
54void 41void
55client::flush () 42client::flush ()
56{ 43{
57#ifdef __linux__ 44 if (destroyed ())
58 // check time of last ack, and, if too old, kill connection 45 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 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 if (!outputbuffer.len || socket_ev.poll () & PE_W) 54 // write a nop to the socket at least every IDLE_PING seconds.
55 if (!outputbuffer.len)
56 {
57 if (last_send + IDLE_PING <= NOW && pl && pl->active)
58 {
59 // this is a bit ugly, but map1a seems to be the only
60 // nop'able command and it is quite small.
61 packet sl ("map1a");
62 send_packet (sl);
63 }
64 else
65 return;
66 }
67
68 if (socket_ev.poll () & EV_WRITE)
87 return; 69 return;
88 70
71 last_send = NOW;
89 write_outputbuffer (); 72 write_outputbuffer ();
90} 73}
91 74
92void 75void
93client::write_outputbuffer () 76client::write_outputbuffer ()
… …
103 /* wrap back to start of buffer */ 86 /* wrap back to start of buffer */
104 if (outputbuffer.start == SOCKETBUFSIZE) 87 if (outputbuffer.start == SOCKETBUFSIZE)
105 outputbuffer.start = 0; 88 outputbuffer.start = 0;
106 89
107 outputbuffer.len -= res; 90 outputbuffer.len -= res;
108#ifdef CS_LOGSTATS
109 cst_tot.obytes += res;
110 cst_lst.obytes += res;
111#endif
112 } 91 }
113 else if (res == 0) 92 else if (res == 0)
114 { 93 {
115 LOG (llevError, "socket write failed, connection closed.\n"); 94 LOG (llevError, "socket write failed, connection closed.\n");
116 destroy (); 95 destroy ();
… …
121 // just retry 100 // just retry
122 } 101 }
123 else if (errno == EAGAIN) 102 else if (errno == EAGAIN)
124 { 103 {
125 // delay till ready 104 // delay till ready
126 socket_ev.poll (socket_ev.poll () | PE_W); 105 socket_ev.poll (socket_ev.poll () | EV_WRITE);
127 socket_ev.start (); 106 socket_ev.start ();
128 return; 107 return;
129 } 108 }
130 else 109 else
131 { 110 {
… …
133 destroy (); 112 destroy ();
134 return; 113 return;
135 } 114 }
136 } 115 }
137 116
138 socket_ev.poll (socket_ev.poll () & ~PE_W); 117 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
139} 118}
140 119
141/****************************************************************************** 120/******************************************************************************
142 * 121 *
143 * Start of read routines. 122 * Start of read routines.
… …
154 if (inbuf_len >= 2 + pkt_len) 133 if (inbuf_len >= 2 + pkt_len)
155 return 2 + pkt_len; 134 return 2 + pkt_len;
156 135
157 if (inbuf_len == sizeof (inbuf)) 136 if (inbuf_len == sizeof (inbuf))
158 { 137 {
159 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);
160 destroy (); 139 destroy ();
161 return -1; 140 return -1;
162 } 141 }
163 } 142 }
164 143
… …
172 memmove (inbuf, inbuf + len, inbuf_len); 151 memmove (inbuf, inbuf + len, inbuf_len);
173} 152}
174 153
175/***************************************************************************** 154/*****************************************************************************
176 * Start of command dispatch area. 155 * Start of command dispatch area.
177 * The commands here are protocol commands. 156 * The commands here are protocol commands.
178 ****************************************************************************/ 157 ****************************************************************************/
179 158
180// SocketCommand, PlayingCommand, should not exist with those ugly casts 159// SocketCommand, PlayingCommand, should not exist with those ugly casts
181#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 160#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 | 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}
183 168
184/** 169/**
185 * Dispatch table for the server. 170 * Dispatch table for the server.
186 */ 171 */
187static struct packet_type packets[] = { 172static struct packet_type packets[] = {
188 {"ncom", PC(NewPlayerCmd) PF_PLAYING },
189 {"command", PC(PlayerCmd) PF_PLAYING }, 173 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND },
190 174
191 {"examine", PC(ExamineCmd) PF_PLAYING }, 175 {"examine", PC(ExamineCmd) PF_PLAYING },
176 {"ex", PC(ExCmd) PF_PLAYING },
192 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
193 {"reply", PC(ReplyCmd) PF_IMMEDIATE },
194 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
195 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
196 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
197 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
198 {"exti", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */
199 {"ext", PC(ExtCmd) 0 }, /* CF+ */ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
200 {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */ 183 {"mapredraw", PC(MapRedrawCmd) 0 },
201 {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
202 185
186 {"reply", SC(ReplyCmd) 0 },
187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
203 {"addme", SC(AddMeCmd) PF_IMMEDIATE }, 188 {"addme", SC(AddMeCmd) 0 },
204 {"askface", SC(SendFaceCmd) PF_IMMEDIATE }, /* Added: phil */ 189 {"askface", SC(AskFaceCmd) 0 },
205 {"requestinfo", SC(RequestInfo) PF_IMMEDIATE }, 190 {"requestinfo", SC(RequestInfo) 0 },
206 {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE },
207 {"setsound", SC(SetSound) PF_IMMEDIATE }, 191 {"setsound", SC(SetSound) 0 },
208 {"setup", SC(SetUp) PF_IMMEDIATE }, 192 {"setup", SC(SetUp) 0 },
209 {"version", SC(VersionCmd) PF_IMMEDIATE }, 193 {"version", SC(VersionCmd) 0 },
210 {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */ 194
211 {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
212 {"asksmooth", SC(AskSmooth) PF_IMMEDIATE }, /*Added: tchize (smoothing technologies) */
213}; 196};
214 197
215bool 198bool
216client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
217{ 200{
218 return (!(pkt->flags & PF_PLAYER) || pl) 201 return (!(pkt->flags & PF_PLAYER) || pl)
219 && (!(pkt->flags & PF_PLAYING) || (pl && pl->state == ST_PLAYING)); 202 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
203}
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_COMMAND))
214 return false;
215
216 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
217 return false;
218
219 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
220 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
221 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
222 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
223 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
224
225 if (len == 7 && !strcmp (data, "suicide")) return true;
226
227 return false;
220} 228}
221 229
222void 230void
223client::execute (const packet_type *pkt, char *data, int datalen) 231client::execute (const packet_type *pkt, char *data, int datalen)
224{ 232{
225 if (may_execute (pkt)) 233 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
226 { 234 {
227 //TODO: only one format 235 //TODO: only one format
228 if (pkt->flags & PF_PLAYER) 236 if (pkt->flags & PF_PLAYER)
237 {
229 ((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 }
230 else 241 else
231 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 242 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
232 } 243 }
233 else 244 else
234 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);
235} 246}
236 247
237bool 248bool
238client::handle_packet () 249client::handle_packet ()
239{ 250{
… …
247 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 258 pl && pl->ob ? &pl->ob->name : "[anonymous]");
248 destroy (); 259 destroy ();
249 return false; 260 return false;
250 } 261 }
251 262
263 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
252 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 264 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
253 265
254 /* First, break out beginning word. There are at least 266 /* First, break out beginning word. There are at least
255 * a few commands that do not have any paremeters. If 267 * a few commands that do not have any paremeters. If
256 * we get such a command, don't worry about trying 268 * we get such a command, don't worry about trying
257 * to break it up. 269 * to break it up.
… …
268 { 280 {
269 data = (char *)inbuf + 2; // better read garbage than segfault 281 data = (char *)inbuf + 2; // better read garbage than segfault
270 datalen = 0; 282 datalen = 0;
271 } 283 }
272 284
273 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)
274 if (!strcmp ((char *)inbuf + 2, pkt->name)) 286 if (!strcmp ((char *)inbuf + 2, pkt->name))
275 { 287 {
276 if (pkt->flags & PF_IMMEDIATE) 288 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
289 queue_command (pkt, data, datalen);
290 else
277 execute (pkt, data, datalen); 291 execute (pkt, data, datalen);
278 else
279 queue_command (pkt, data, datalen);
280 292
281 goto next_packet; 293 goto next_packet;
282 } 294 }
283 295
284 /* If we get here, we didn't find a valid command. Logging 296 // 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); 297 send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
298
289next_packet: 299next_packet:
300 inbuf [pkt_len] = save_byte; // rather ugly
290 skip_packet (pkt_len); 301 skip_packet (pkt_len);
291 302
292 // input buffer has space again 303 // input buffer has space again
293 socket_ev.poll (socket_ev.poll () | PE_R); 304 socket_ev.poll (socket_ev.poll () | EV_READ);
294 305
295 return true; 306 return true;
296} 307}
297 308
309void
310client::inbuf_handle ()
311{
312 if (!handle_packet ())
313 return;
314
315 while (handle_packet ())
316 ;
317
318 flush ();
319}
320
298// callback called when socket is either readable or writable 321// callback called when socket is either readable or writable
299void 322void
300client::socket_cb (iow &w, int got) 323client::socket_cb (iow &w, int revents)
301{ 324{
302 //TODO remove when we have better socket cleanup logic 325 //TODO remove when we have better socket cleanup logic
303 if (status == Ns_Dead) 326 if (destroyed ())
304 { 327 {
305 socket_ev.poll (0); 328 socket_ev.poll (0);
306 return; 329 return;
307 } 330 }
308 331
309 if (got & PE_W) 332 if (revents & EV_WRITE)
310 { 333 {
311 write_outputbuffer (); 334 write_outputbuffer ();
312 335
313 if (!outputbuffer.len) 336 if (!outputbuffer.len)
314 socket_ev.poll (socket_ev.poll () & ~PE_W); 337 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
315 }
316
317 if (got & PE_R)
318 { 338 }
319 //TODO: rate-limit tcp connection in better ways, important
320 339
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;
321 int amount = sizeof (inbuf) - inbuf_len; 356 amount = sizeof (inbuf) - inbuf_len;
357 }
322 358
323 if (!amount) 359 if (!amount)
324 { 360 {
325 // input buffer full 361 // input buffer full
326 socket_ev.poll (socket_ev.poll () & ~PE_R); 362 LOG (llevError, "input buffer overflow.");
363 destroy ();
327 return; 364 return;
328 } 365 }
329 366
330 amount = read (fd, inbuf + inbuf_len, amount); 367 amount = read (fd, rbuf, amount);
331 368
332 if (!amount) 369 if (!amount)
333 { 370 {
334 destroy (); 371 destroy ();
335 return; 372 return;
… …
343 return; 380 return;
344 } 381 }
345 382
346 // should not be here, normally 383 // should not be here, normally
347 } 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 }
348 else 499 else
349 { 500 {
350 inbuf_len += amount; 501 inbuf_len += amount;
351 502 inbuf_handle ();
352 cst_tot.ibytes += amount;
353 cst_lst.ibytes += amount;
354
355 cmd_ev.start ();
356 } 503 }
357 } 504 }
358}
359
360// called whenever we have additional commands to process
361void
362client::cmd_cb (iw &w)
363{
364 if (handle_packet () || handle_command ())
365 w.start ();
366 else
367 flush ();
368} 505}
369 506
370/******************************************************************************* 507/*******************************************************************************
371 * 508 *
372 * Start of write related routines. 509 * Start of write related routines.
… …
381 */ 518 */
382void 519void
383client::send (void *buf_, int len) 520client::send (void *buf_, int len)
384{ 521{
385 char *buf = (char *)buf_; 522 char *buf = (char *)buf_;
386 char *pos = buf;
387 int amt = 0;
388 523
389 if (status == Ns_Dead || !buf) 524 if (destroyed () || !buf)
390 return; 525 return;
391 526
392 if ((len + outputbuffer.len) > SOCKETBUFSIZE) 527 if (len + outputbuffer.len > SOCKETBUFSIZE)
393 { 528 {
394 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); 529 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
395 destroy (); 530 // shutdown the socket, this is safer than destroying it immediately
531 // as lots of code in the callchain might still access the map etc.
532 shutdown (fd, SHUT_RDWR);
396 return; 533 return;
397 } 534 }
398 535
399 int avail, end; 536 int avail, end;
400 537
… …
425 * shortcut function. 562 * shortcut function.
426 */ 563 */
427void 564void
428client::send_packet (packet &sl) 565client::send_packet (packet &sl)
429{ 566{
430 if (status == Ns_Dead) 567 if (destroyed ())
431 return; 568 return;
432 569
433 if (sl.length () >= MAXSOCKBUF) 570 if (sl.length () > MAXSOCKBUF)
434 { 571 {
435 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 ());
436 /* 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
437 * it easier to debug. 574 * it easier to debug.
438 */ 575 */
… …
440 } 577 }
441 578
442 if (!sl.length ()) 579 if (!sl.length ())
443 return; 580 return;
444 581
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 {
445 assert (sl.hdrlen == 2); 638 assert (sl.hdrlen == 2);
446 639
447 sl.buf_ [0] = sl.length () >> 8; 640 sl.buf_ [0] = sl.length () >> 8;
448 sl.buf_ [1] = sl.length () ; 641 sl.buf_ [1] = sl.length () ;
449 642
450 send (sl.buf_, sl.length () + sl.hdrlen); 643 send (sl.buf_, sl.length () + sl.hdrlen);
644 }
451} 645}
452 646
453void 647void
454client::send_packet (const char *buf, int len) 648client::send_packet (const char *buf, int len)
455{ 649{
456 packet sl; 650 packet sl;
457 651
458 sl << data (buf, len); 652 sl << data_n (buf, len);
459 send_packet (sl); 653 send_packet (sl);
460} 654}
461 655
462void 656void
463client::send_packet (const char *buf) 657client::send_packet (const char *buf)
… …
476 va_end (ap); 670 va_end (ap);
477 671
478 send_packet (sl); 672 send_packet (sl);
479} 673}
480 674
675void
676client::send_msg (int color, const char *type, const char *msg)
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)
687 && (msg_is_special (msg)
688 || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)))
689 cfperl_send_msg (this, color, type, msg);
690 else
691 send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg);
692}
693
481/*********************************************************************** 694/***********************************************************************
482 * 695 *
483 * packet functions/utilities 696 * packet functions/utilities
484 * 697 *
485 **********************************************************************/ 698 **********************************************************************/
486 699
700packet::packet (const char *name)
701{
702 reset ();
703
704 int len = strlen (name);
705 memcpy (cur, name, len); cur += len;
706 *cur++ = ' ';
707}
708
709packet &packet::operator <<(const ber32 v)
710{
711 enum { maxlen = 32 / 7 + 1 };
712 uint8 buf[maxlen];
713 uint8 *p = buf + maxlen;
714 uint32 val = v.val;
715
716 *--p = val & 0x7F;
717
718 while (val > 0x7F)
719 {
720 val >>= 7;
721 *--p = (val & 0x7F) | 0x80;
722 }
723
724 return *this << data_n (p, buf + maxlen - p);
725}
726
487packet &packet::operator <<(const data &v) 727packet &packet::operator <<(const data_n &v)
488{ 728{
489 if (room () < v.len) 729 if (room () < v.len)
490 reset (); 730 reset ();
491 else 731 else
492 { 732 {
… …
501} 741}
502 742
503packet &packet::operator <<(const data8 &v) 743packet &packet::operator <<(const data8 &v)
504{ 744{
505 unsigned int len = min (v.len, 0x00FF); 745 unsigned int len = min (v.len, 0x00FF);
506 return *this << uint8 (len) << data (v.ptr, len); 746 return *this << uint8 (len) << data_n (v.ptr, len);
507} 747}
508 748
509packet &packet::operator <<(const data16 &v) 749packet &packet::operator <<(const data16 &v)
510{ 750{
511 unsigned int len = min (v.len, 0xFFFF); 751 unsigned int len = min (v.len, 0xFFFF);
512 return *this << uint16 (len) << data (v.ptr, len); 752 return *this << uint16 (len) << data_n (v.ptr, len);
513} 753}
514 754
515packet &packet::operator <<(const char *v) 755packet &packet::operator <<(const char *v)
516{ 756{
517 return *this << data (v, strlen (v ? v : 0)); 757 return *this << data_n (v, v ? strlen (v) : 0);
518} 758}
519 759
520void 760void
521packet::vprintf (const char *format, va_list ap) 761packet::vprintf (const char *format, va_list ap)
522{ 762{
… …
528 return reset (); 768 return reset ();
529 769
530 cur += len; 770 cur += len;
531} 771}
532 772
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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