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Revision 1.21 by root, Fri Dec 15 00:14:13 2006 UTC vs.
Revision 1.88 by root, Tue Nov 6 15:11:16 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) 1992 Frank Tore Johansen 4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 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 <newclient.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# define TCP_HZ 1000 // sorry...
47# include <netinet/tcp.h> 33# include <netinet/tcp.h>
48#endif 34#endif
49 35
50// 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,
51// easily die in 20 seconds... 37// forcing an ack regularly.
52#define SOCKET_TIMEOUT1 10 38#define IDLE_PING 2.
53#define SOCKET_TIMEOUT2 20
54 39
55void 40void
56client_socket::flush () 41client::flush ()
57{ 42{
58#ifdef __linux__ 43 if (destroyed ())
59 // check time of last ack, and, if too old, kill connection 44 return;
60 struct tcp_info tcpi;
61 socklen_t len = sizeof (tcpi);
62
63 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
64 {
65 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
66
67 rtt = tcpi.tcpi_rtt;
68 rttvar = tcpi.tcpi_rttvar;
69
70 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s
71 && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
72 {
73 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
74 (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
75 status = Ns_Dead;
76 }
77 }
78#endif
79 45
80 /** 46 /**
81 * Writes data to socket. 47 * Writes data to socket.
82 * 48 *
83 * 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
84 * is called to write it out. 50 * is called to write it out.
85 */ 51 */
86 52
87 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)
88 return; 68 return;
89 69
70 last_send = NOW;
90 write_outputbuffer (); 71 write_outputbuffer ();
91} 72}
92 73
93void 74void
94client_socket::write_outputbuffer () 75client::write_outputbuffer ()
95{ 76{
96 while (outputbuffer.len) 77 while (outputbuffer.len)
97 { 78 {
98 int res = write (fd, outputbuffer.data + outputbuffer.start, 79 int res = write (fd, outputbuffer.data + outputbuffer.start,
99 min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); 80 min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
… …
104 /* wrap back to start of buffer */ 85 /* wrap back to start of buffer */
105 if (outputbuffer.start == SOCKETBUFSIZE) 86 if (outputbuffer.start == SOCKETBUFSIZE)
106 outputbuffer.start = 0; 87 outputbuffer.start = 0;
107 88
108 outputbuffer.len -= res; 89 outputbuffer.len -= res;
109#ifdef CS_LOGSTATS
110 cst_tot.obytes += res;
111 cst_lst.obytes += res;
112#endif
113 } 90 }
114 else if (res == 0) 91 else if (res == 0)
115 { 92 {
116 LOG (llevError, "socket write failed, connection closed.\n"); 93 LOG (llevError, "socket write failed, connection closed.\n");
117 status = Ns_Dead; 94 destroy ();
118 return; 95 return;
119 } 96 }
120 else if (errno == EINTR) 97 else if (errno == EINTR)
121 { 98 {
122 // just retry 99 // just retry
123 } 100 }
124 else if (errno == EAGAIN) 101 else if (errno == EAGAIN)
125 { 102 {
126 // delay till ready 103 // delay till ready
127 socket_ev.poll (socket_ev.poll () | PE_W); 104 socket_ev.poll (socket_ev.poll () | EV_WRITE);
128 socket_ev.start (); 105 socket_ev.start ();
129 return; 106 return;
130 } 107 }
131 else 108 else
132 { 109 {
133 LOG (llevError, "socket write failed: %s\n", strerror (errno)); 110 LOG (llevError, "socket write failed: %s\n", strerror (errno));
134 status = Ns_Dead; 111 destroy ();
135 return; 112 return;
136 } 113 }
137 } 114 }
138 115
139 socket_ev.poll (socket_ev.poll () & ~PE_W); 116 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
140} 117}
141 118
119/******************************************************************************
120 *
121 * Start of read routines.
122 *
123 ******************************************************************************/
124
125int
126client::next_packet ()
127{
128 if (inbuf_len >= 2)
129 {
130 int pkt_len = (inbuf [0] << 8) | inbuf [1];
131
132 if (inbuf_len >= 2 + pkt_len)
133 return 2 + pkt_len;
134
135 if (inbuf_len == sizeof (inbuf))
136 {
137 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY);
138 destroy ();
139 return -1;
140 }
141 }
142
143 return 0;
144}
145
146void
147client::skip_packet (int len)
148{
149 inbuf_len -= len;
150 memmove (inbuf, inbuf + len, inbuf_len);
151}
152
142/*********************************************************************** 153/*****************************************************************************
143 * 154 * Start of command dispatch area.
144 * packet functions/utilities 155 * The commands here are protocol commands.
145 *
146 **********************************************************************/ 156 ****************************************************************************/
147 157
148packet &packet::operator <<(const data &v) 158// SocketCommand, PlayingCommand, should not exist with those ugly casts
159#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
160#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
161
162static void
163NopCmd (char *, int, client *)
149{ 164{
150 if (room () < v.len) 165 // do nothing
151 reset (); 166}
167
168/**
169 * Dispatch table for the server.
170 */
171static struct packet_type packets[] = {
172 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
173 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 },
174
175 {"examine", PC(ExamineCmd) PF_PLAYING },
176 {"ex", PC(ExCmd) PF_PLAYING },
177 {"apply", PC(ApplyCmd) PF_PLAYING },
178 {"lookat", PC(LookAt) PF_PLAYING },
179 {"lock", PC(LockItem) PF_PLAYING },
180 {"mark", PC(MarkItem) PF_PLAYING },
181 {"move", PC(MoveCmd) PF_PLAYING },
182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
183 {"mapredraw", PC(MapRedrawCmd) 0 },
184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
185
186 {"reply", SC(ReplyCmd) 0 },
187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
188 {"addme", SC(AddMeCmd) 0 },
189 {"askface", SC(AskFaceCmd) 0 },
190 {"requestinfo", SC(RequestInfo) 0 },
191 {"setsound", SC(SetSound) 0 },
192 {"setup", SC(SetUp) 0 },
193 {"version", SC(VersionCmd) 0 },
194
195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
196};
197
198bool
199client::may_execute (const packet_type *pkt) const
200{
201 return (!(pkt->flags & PF_PLAYER) || pl)
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_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
236void
237client::execute (const packet_type *pkt, char *data, int datalen)
238{
239 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
240 {
241 //TODO: only one format
242 if (pkt->flags & PF_PLAYER)
243 {
244 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
245 pl->need_updated_stats ();
246 }
247 else
248 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
249 }
152 else 250 else
251 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name);
252}
253
254bool
255client::handle_packet ()
256{
257 int pkt_len = next_packet ();
258
259 if (!pkt_len)
260 return false;
261 else if (pkt_len < 0)
262 {
263 LOG (llevError, "read error on player %s\n",
264 pl && pl->ob ? &pl->ob->name : "[anonymous]");
265 destroy ();
266 return false;
153 { 267 }
154 if (v.len) 268
269 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
270 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
271
272 /* First, break out beginning word. There are at least
273 * a few commands that do not have any paremeters. If
274 * we get such a command, don't worry about trying
275 * to break it up.
276 */
277 int datalen;
278 char *data = strchr ((char *)inbuf + 2, ' ');
279
280 if (data)
281 {
282 *data++ = 0;
283 datalen = pkt_len - (data - (char *)inbuf);
284 }
285 else
286 {
287 data = (char *)inbuf + 2; // better read garbage than segfault
288 datalen = 0;
289 }
290
291 for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
292 if (!strcmp ((char *)inbuf + 2, pkt->name))
155 { 293 {
156 memcpy (cur, v.ptr, v.len); 294 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
157 cur += v.len; 295 queue_command (pkt, data, datalen);
296 else
297 execute (pkt, data, datalen);
298
299 goto next_packet;
158 } 300 }
301
302 // If we get here, we didn't find a valid command.
303 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2);
304
305next_packet:
306 inbuf [pkt_len] = save_byte; // rather ugly
307 skip_packet (pkt_len);
308
309 // input buffer has space again
310 socket_ev.poll (socket_ev.poll () | EV_READ);
311
312 return true;
313}
314
315void
316client::inbuf_handle ()
317{
318 if (!handle_packet ())
319 return;
320
321 while (handle_packet ())
159 } 322 ;
160 323
161 return *this; 324 flush ();
162} 325}
163 326
164packet &packet::operator <<(const data8 &v) 327// callback called when socket is either readable or writable
165{
166 unsigned int len = min (v.len, 0x00FF);
167 return *this << uint8 (len) << data (v.ptr, len);
168}
169
170packet &packet::operator <<(const data16 &v)
171{
172 unsigned int len = min (v.len, 0xFFFF);
173 return *this << uint16 (len) << data (v.ptr, len);
174}
175
176packet &packet::operator <<(const char *v)
177{
178 return *this << data (v, strlen (v ? v : 0));
179}
180
181void 328void
182packet::printf (const char *format, ...) 329client::socket_cb (iow &w, int revents)
183{ 330{
184 int size = room (); 331 //TODO remove when we have better socket cleanup logic
185 332 if (destroyed ())
186 va_list ap; 333 {
187 va_start (ap, format); 334 socket_ev.poll (0);
188 int len = vsnprintf ((char *)cur, size, format, ap); 335 return;
189 va_end (ap);
190
191 if (len >= size)
192 return reset ();
193
194 cur += len;
195}
196
197/******************************************************************************
198 *
199 * Start of read routines.
200 *
201 ******************************************************************************/
202
203int
204client_socket::read_packet ()
205{
206 for (;;)
207 { 336 }
208 if (inbuf_len >= 2)
209 {
210 unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1];
211 337
212 if (inbuf_len >= 2 + pkt_len) 338 if (revents & EV_WRITE)
213 return pkt_len + 2; 339 {
214 } 340 write_outputbuffer ();
341
342 if (!outputbuffer.len)
343 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
344 }
345
346 if (revents & EV_READ)
347 {
348 //TODO: rate-limit tcp connection in better ways, important
215 349
216 int amount = sizeof (inbuf) - inbuf_len; 350 int amount = sizeof (inbuf) - inbuf_len;
217 351
218 if (amount <= 0)
219 {
220 LOG (llevError, "packet too large");//TODO
221 return -1;
222 }
223
224 amount = read (fd, inbuf + inbuf_len, amount);
225
226 if (!amount) 352 if (!amount)
227 { 353 {
228 status = Ns_Dead; 354 // input buffer full
355 LOG (llevError, "input buffer overflow.");
356 destroy ();
229 return -1; 357 return;
358 }
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
470 amount = read (fd, inbuf + inbuf_len, amount);
471
472 if (!amount)
473 {
474 destroy ();
475 return;
230 } 476 }
231 else if (amount < 0) 477 else if (amount < 0)
232 { 478 {
233 if (errno != EAGAIN && errno != EINTR) 479 if (errno != EAGAIN && errno != EINTR)
234 { 480 {
235 LOG (llevError, "read error: %s\n", strerror (errno)); 481 LOG (llevError, "read error: %s\n", strerror (errno));
482 destroy ();
236 return -1; 483 return;
237 } 484 }
238 485
239 return 0; 486 // should not be here, normally
487 }
488 else
240 } 489 {
241
242 inbuf_len += amount; 490 inbuf_len += amount;
243 491 inbuf_handle ();
244 cst_tot.ibytes += amount; 492 }
245 cst_lst.ibytes += amount;
246 } 493 }
247}
248
249void
250client_socket::skip_packet (int len)
251{
252 inbuf_len -= len;
253 memmove (inbuf, inbuf + len, inbuf_len);
254} 494}
255 495
256/******************************************************************************* 496/*******************************************************************************
257 * 497 *
258 * Start of write related routines. 498 * Start of write related routines.
… …
264 * 504 *
265 * ns is the socket we are adding the data to, buf is the start of the 505 * ns is the socket we are adding the data to, buf is the start of the
266 * data, and len is the number of bytes to add. 506 * data, and len is the number of bytes to add.
267 */ 507 */
268void 508void
269client_socket::send (void *buf_, int len) 509client::send (void *buf_, int len)
270{ 510{
271 char *buf = (char *)buf_; 511 char *buf = (char *)buf_;
272 char *pos = buf;
273 int amt = 0;
274 512
275 if (status == Ns_Dead || !buf) 513 if (destroyed () || !buf)
276 {
277 LOG (llevDebug, "Write_To_Socket called with dead socket\n");
278 return; 514 return;
279 }
280 515
281 if ((len + outputbuffer.len) > SOCKETBUFSIZE) 516 if (len + outputbuffer.len > SOCKETBUFSIZE)
282 { 517 {
283 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);
284 status = Ns_Dead; 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);
285 return; 522 return;
286 } 523 }
287 524
288 int avail, end; 525 int avail, end;
289 526
… …
307 } 544 }
308 545
309 outputbuffer.len += len; 546 outputbuffer.len += len;
310} 547}
311 548
312void
313client_socket::socket_cb (iow &w, int got)
314{
315 write_outputbuffer ();
316
317 if (!outputbuffer.len)
318 socket_ev.poll (socket_ev.poll () & ~PE_W);
319}
320
321/** 549/**
322 * Takes a string of data, and writes it out to the socket. A very handy 550 * Takes a string of data, and writes it out to the socket. A very handy
323 * shortcut function. 551 * shortcut function.
324 */ 552 */
325void 553void
326client_socket::send_packet (packet &sl) 554client::send_packet (packet &sl)
327{ 555{
328 if (status == Ns_Dead) 556 if (destroyed ())
329 return; 557 return;
330 558
331 if (sl.length () >= MAXSOCKBUF) 559 if (sl.length () > MAXSOCKBUF)
332 { 560 {
333 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 ());
334 /* 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
335 * it easier to debug. 563 * it easier to debug.
336 */ 564 */
… …
338 } 566 }
339 567
340 if (!sl.length ()) 568 if (!sl.length ())
341 return; 569 return;
342 570
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, 126, l >> 8, l };
615 send (hdr, sizeof (hdr));
616 }
617 else
618 {
619 uint8 hdr [] = { 0x82, l };
620 send (hdr, sizeof (hdr));
621 }
622
623 send (sl.buf_ + sl.hdrlen, l);
624 }
625 else
626 {
343 assert (sl.hdrlen == 2); 627 assert (sl.hdrlen == 2);
344 628
345 sl.buf_ [0] = sl.length () >> 8; 629 sl.buf_ [0] = sl.length () >> 8;
346 sl.buf_ [1] = sl.length () ; 630 sl.buf_ [1] = sl.length () ;
347 631
348 send (sl.buf_, sl.length () + sl.hdrlen); 632 send (sl.buf_, sl.length () + sl.hdrlen);
633 }
349} 634}
350 635
351void 636void
352client_socket::send_packet (const char *buf, int len) 637client::send_packet (const char *buf, int len)
353{ 638{
354 packet sl; 639 packet sl;
355 640
356 sl << data (buf, len); 641 sl << data (buf, len);
357 send_packet (sl); 642 send_packet (sl);
358} 643}
359 644
360void 645void
361client_socket::send_packet (const char *buf) 646client::send_packet (const char *buf)
362{ 647{
363 send_packet (buf, strlen (buf)); 648 send_packet (buf, strlen (buf));
364} 649}
365 650
651void
652client::send_packet_printf (const char *format, ...)
653{
654 packet sl;
655
656 va_list ap;
657 va_start (ap, format);
658 sl.vprintf (format, ap);
659 va_end (ap);
660
661 send_packet (sl);
662}
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
366/****************************************************************************** 689/***********************************************************************
367 * 690 *
368 * statistics logging functions. 691 * packet functions/utilities
369 * 692 *
370 ******************************************************************************/ 693 **********************************************************************/
371 694
372#ifdef CS_LOGSTATS 695packet::packet (const char *name)
373
374/* cst_tot is for the life of the server, cst_last is for the last series of
375 * stats
376 */
377CS_Stats cst_tot, cst_lst;
378
379/**
380 * Writes out the gathered stats. We clear cst_lst.
381 */
382void
383write_cs_stats (void)
384{ 696{
385 time_t now = time (NULL); 697 reset ();
386 698
387 /* If no connections recently, don't both to log anything */ 699 int len = strlen (name);
388 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) 700 memcpy (cur, name, len); cur += len;
389 return; 701 *cur++ = ' ';
390
391 /* CSSTAT is put in so scripts can easily find the line */
392 LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
393 ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
394 now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
395 cst_lst.ibytes = 0;
396 cst_lst.obytes = 0;
397 cst_lst.time_start = now;
398} 702}
399#endif
400 703
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
722packet &packet::operator <<(const data &v)
723{
724 if (room () < v.len)
725 reset ();
726 else
727 {
728 if (v.len)
729 {
730 memcpy (cur, v.ptr, v.len);
731 cur += v.len;
732 }
733 }
734
735 return *this;
736}
737
738packet &packet::operator <<(const data8 &v)
739{
740 unsigned int len = min (v.len, 0x00FF);
741 return *this << uint8 (len) << data (v.ptr, len);
742}
743
744packet &packet::operator <<(const data16 &v)
745{
746 unsigned int len = min (v.len, 0xFFFF);
747 return *this << uint16 (len) << data (v.ptr, len);
748}
749
750packet &packet::operator <<(const char *v)
751{
752 return *this << data (v, strlen (v ? v : 0));
753}
754
755void
756packet::vprintf (const char *format, va_list ap)
757{
758 int size = room ();
759
760 int len = vsnprintf ((char *)cur, size, format, ap);
761
762 if (len >= size)
763 return reset ();
764
765 cur += len;
766}
767

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