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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.34 by pippijn, Thu Mar 1 12:28:17 2007 UTC vs.
Revision 1.100 by root, Wed Nov 14 23:24:27 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) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2018 Marc Alexander Lehmann / the Deliantra team
5 * Copyright (C) 1992 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 * This program 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 2 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, write to the Free Software 18 * and the GNU General Public License along with this program. If not, see
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 * <http://www.gnu.org/licenses/>.
20 * 20 *
21 * The author can be reached via e-mail to mark@pyramid.com 21 * The authors can be reached via e-mail to <support@deliantra.net>
22 */
23
24/**
25 * \file
26 * Low-level socket-related functions.
27 *
28 * \date 2003-12-02
29 *
30 * Contains some base functions that both the client and server
31 * can use. As such, depending what we are being compiled for will
32 * determine what we can include. the client is designed have
33 * CFCLIENT defined as part of its compile flags.
34 */ 22 */
35 23
36using namespace std; 24using namespace std;
37 25
38#include <global.h> 26#include <global.h>
39#include <sproto.h> 27#include <sproto.h>
40#include <cstdarg> 28#include <cstdarg>
41 29
42#ifdef __linux__ 30#if HAVE_TCP_INFO
43# include <sys/types.h> 31# include <sys/types.h>
44# include <sys/socket.h> 32# include <sys/socket.h>
45# include <netinet/in.h> 33# include <netinet/in.h>
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 * 1000 39#define IDLE_PING 2.
52#define SOCKET_TIMEOUT2 20 * 1000
53 40
54void 41void
55client::flush () 42client::flush ()
56{ 43{
57 if (destroyed ()) 44 if (destroyed ())
58 return; 45 return;
59
60#ifdef __linux__
61 // check time of last ack, and, if too old, kill connection
62 struct tcp_info tcpi;
63 socklen_t len = sizeof (tcpi);
64
65 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
66 {
67 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
68
69 rtt = tcpi.tcpi_rtt;
70 rttvar = tcpi.tcpi_rttvar;
71
72 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s
73 && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s
74 {
75 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
76 (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked);
77 destroy ();
78 }
79 }
80#endif
81 46
82 /** 47 /**
83 * Writes data to socket. 48 * Writes data to socket.
84 * 49 *
85 * 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
86 * is called to write it out. 51 * is called to write it out.
87 */ 52 */
88 53
89 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)
90 return; 69 return;
91 70
71 last_send = NOW;
92 write_outputbuffer (); 72 write_outputbuffer ();
93} 73}
94 74
95void 75void
96client::write_outputbuffer () 76client::write_outputbuffer ()
… …
106 /* wrap back to start of buffer */ 86 /* wrap back to start of buffer */
107 if (outputbuffer.start == SOCKETBUFSIZE) 87 if (outputbuffer.start == SOCKETBUFSIZE)
108 outputbuffer.start = 0; 88 outputbuffer.start = 0;
109 89
110 outputbuffer.len -= res; 90 outputbuffer.len -= res;
111#ifdef CS_LOGSTATS
112 cst_tot.obytes += res;
113 cst_lst.obytes += res;
114#endif
115 } 91 }
116 else if (res == 0) 92 else if (res == 0)
117 { 93 {
118 LOG (llevError, "socket write failed, connection closed.\n"); 94 LOG (llevError, "socket write failed, connection closed.\n");
119 destroy (); 95 destroy ();
… …
124 // just retry 100 // just retry
125 } 101 }
126 else if (errno == EAGAIN) 102 else if (errno == EAGAIN)
127 { 103 {
128 // delay till ready 104 // delay till ready
129 socket_ev.poll (socket_ev.poll () | PE_W); 105 socket_ev.poll (socket_ev.poll () | EV_WRITE);
130 socket_ev.start (); 106 socket_ev.start ();
131 return; 107 return;
132 } 108 }
133 else 109 else
134 { 110 {
… …
136 destroy (); 112 destroy ();
137 return; 113 return;
138 } 114 }
139 } 115 }
140 116
141 socket_ev.poll (socket_ev.poll () & ~PE_W); 117 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
142} 118}
143 119
144/****************************************************************************** 120/******************************************************************************
145 * 121 *
146 * Start of read routines. 122 * Start of read routines.
… …
157 if (inbuf_len >= 2 + pkt_len) 133 if (inbuf_len >= 2 + pkt_len)
158 return 2 + pkt_len; 134 return 2 + pkt_len;
159 135
160 if (inbuf_len == sizeof (inbuf)) 136 if (inbuf_len == sizeof (inbuf))
161 { 137 {
162 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);
163 destroy (); 139 destroy ();
164 return -1; 140 return -1;
165 } 141 }
166 } 142 }
167 143
… …
175 memmove (inbuf, inbuf + len, inbuf_len); 151 memmove (inbuf, inbuf + len, inbuf_len);
176} 152}
177 153
178/***************************************************************************** 154/*****************************************************************************
179 * Start of command dispatch area. 155 * Start of command dispatch area.
180 * The commands here are protocol commands. 156 * The commands here are protocol commands.
181 ****************************************************************************/ 157 ****************************************************************************/
182 158
183// SocketCommand, PlayingCommand, should not exist with those ugly casts 159// SocketCommand, PlayingCommand, should not exist with those ugly casts
184#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), 160#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
185#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | 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}
186 168
187/** 169/**
188 * Dispatch table for the server. 170 * Dispatch table for the server.
189 */ 171 */
190static struct packet_type packets[] = { 172static struct packet_type packets[] = {
191 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
192 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, 173 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND },
193 174
194 {"examine", PC(ExamineCmd) PF_PLAYING }, 175 {"examine", PC(ExamineCmd) PF_PLAYING },
176 {"ex", PC(ExCmd) PF_PLAYING },
195 {"apply", PC(ApplyCmd) PF_PLAYING }, 177 {"apply", PC(ApplyCmd) PF_PLAYING },
196 {"lookat", PC(LookAt) PF_PLAYING }, 178 {"lookat", PC(LookAt) PF_PLAYING },
197 {"lock", PC(LockItem) PF_PLAYING }, 179 {"lock", PC(LockItem) PF_PLAYING },
198 {"mark", PC(MarkItem) PF_PLAYING }, 180 {"mark", PC(MarkItem) PF_PLAYING },
199 {"move", PC(MoveCmd) PF_PLAYING }, 181 {"move", PC(MoveCmd) PF_PLAYING },
200 {"ext", PC(ExtCmd) 0 }, /* CF+ */ 182 {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra
201 {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ 183 {"mapredraw", PC(MapRedrawCmd) 0 },
202 {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ 184 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra
203 185
204 {"reply", SC(ReplyCmd) 0 }, 186 {"reply", SC(ReplyCmd) 0 },
205 {"exti", SC(ExtiCmd) 0 }, /* CF+ */ 187 {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra
206 {"addme", SC(AddMeCmd) 0 }, 188 {"addme", SC(AddMeCmd) 0 },
207 {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ 189 {"askface", SC(AskFaceCmd) 0 },
208 {"requestinfo", SC(RequestInfo) 0 }, 190 {"requestinfo", SC(RequestInfo) 0 },
209 {"setfacemode", SC(SetFaceMode) 0 },
210 {"setsound", SC(SetSound) 0 }, 191 {"setsound", SC(SetSound) 0 },
211 {"setup", SC(SetUp) 0 }, 192 {"setup", SC(SetUp) 0 },
212 {"version", SC(VersionCmd) 0 }, 193 {"version", SC(VersionCmd) 0 },
213 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ 194
214 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ 195 {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled
215 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
216}; 196};
217 197
218bool 198bool
219client::may_execute (const packet_type *pkt) const 199client::may_execute (const packet_type *pkt) const
220{ 200{
221 return (!(pkt->flags & PF_PLAYER) || pl) 201 return (!(pkt->flags & PF_PLAYER) || pl)
222 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); 202 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
223} 203}
224 204
225// HACK: some commands currently should be executed 205// HACK: some commands currently should be executed
226// even when the player is frozen. this hack detects 206// even when the player is frozen. this hack detects
227// those commands. it should be folded into may_execute, 207// those commands. it should be folded into may_execute,
228// but kept seperate to emphasise the hack aspect, i.e. 208// but kept seperate to emphasise the hack aspect, i.e.
229// do it better, then remove. 209// do it better, then remove.
230static bool 210static bool
231always_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)
232{ 212{
233 if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) 213 if (!(pkt->flags & PF_COMMAND))
234 return false; 214 return false;
235 215
236 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) 216 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
237 return false; 217 return false;
238 218
239 if (pkt->flags & PF_COMMAND6) 219 if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true;
240 { 220 if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true;
241 data += 6; 221 if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true;
242 len -= 6; 222 if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true;
243 } 223 if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true;
244 224
245 if (len > 4 && !strncmp (data, "say " , 4)) 225 if (len == 7 && !strcmp (data, "suicide")) return true;
246 return true;
247 if (len > 5 && !strncmp (data, "chat ", 5))
248 return true;
249 226
250 return false; 227 return false;
251} 228}
252 229
253void 230void
… …
255{ 232{
256 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) 233 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
257 { 234 {
258 //TODO: only one format 235 //TODO: only one format
259 if (pkt->flags & PF_PLAYER) 236 if (pkt->flags & PF_PLAYER)
237 {
260 ((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 }
261 else 241 else
262 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); 242 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
263 } 243 }
264 else 244 else
265 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);
266} 246}
267 247
268bool 248bool
269client::handle_packet () 249client::handle_packet ()
270{ 250{
… …
278 pl && pl->ob ? &pl->ob->name : "[anonymous]"); 258 pl && pl->ob ? &pl->ob->name : "[anonymous]");
279 destroy (); 259 destroy ();
280 return false; 260 return false;
281 } 261 }
282 262
263 uint8_t save_byte = inbuf [pkt_len]; // rather ugly
283 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ 264 inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */
284 265
285 /* First, break out beginning word. There are at least 266 /* First, break out beginning word. There are at least
286 * a few commands that do not have any paremeters. If 267 * a few commands that do not have any paremeters. If
287 * we get such a command, don't worry about trying 268 * we get such a command, don't worry about trying
288 * to break it up. 269 * to break it up.
… …
299 { 280 {
300 data = (char *)inbuf + 2; // better read garbage than segfault 281 data = (char *)inbuf + 2; // better read garbage than segfault
301 datalen = 0; 282 datalen = 0;
302 } 283 }
303 284
304 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) 285 for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt)
305 if (!strcmp ((char *)inbuf + 2, pkt->name)) 286 if (!strcmp ((char *)inbuf + 2, pkt->name))
306 { 287 {
307 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) 288 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
308 queue_command (pkt, data, datalen); 289 queue_command (pkt, data, datalen);
309 else 290 else
… …
311 292
312 goto next_packet; 293 goto next_packet;
313 } 294 }
314 295
315 // If we get here, we didn't find a valid command. 296 // If we get here, we didn't find a valid command.
316 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
317next_packet: 299next_packet:
300 inbuf [pkt_len] = save_byte; // rather ugly
318 skip_packet (pkt_len); 301 skip_packet (pkt_len);
319 302
320 // input buffer has space again 303 // input buffer has space again
321 socket_ev.poll (socket_ev.poll () | PE_R); 304 socket_ev.poll (socket_ev.poll () | EV_READ);
322 305
323 return true; 306 return true;
324} 307}
325 308
309void
310client::inbuf_handle ()
311{
312 if (!handle_packet ())
313 return;
314
315 while (handle_packet ())
316 ;
317
318 flush ();
319}
320
326// callback called when socket is either readable or writable 321// callback called when socket is either readable or writable
327void 322void
328client::socket_cb (iow &w, int got) 323client::socket_cb (iow &w, int revents)
329{ 324{
330 //TODO remove when we have better socket cleanup logic 325 //TODO remove when we have better socket cleanup logic
331 if (destroyed ()) 326 if (destroyed ())
332 { 327 {
333 socket_ev.poll (0); 328 socket_ev.poll (0);
334 return; 329 return;
335 } 330 }
336 331
337 if (got & PE_W) 332 if (revents & EV_WRITE)
338 { 333 {
339 write_outputbuffer (); 334 write_outputbuffer ();
340 335
341 if (!outputbuffer.len) 336 if (!outputbuffer.len)
342 socket_ev.poll (socket_ev.poll () & ~PE_W); 337 socket_ev.poll (socket_ev.poll () & ~EV_WRITE);
343 }
344
345 if (got & PE_R)
346 { 338 }
347 //TODO: rate-limit tcp connection in better ways, important
348 339
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;
349 int amount = sizeof (inbuf) - inbuf_len; 356 amount = sizeof (inbuf) - inbuf_len;
357 }
350 358
351 if (!amount) 359 if (!amount)
352 { 360 {
353 // input buffer full 361 // input buffer full
354 socket_ev.poll (socket_ev.poll () & ~PE_R); 362 LOG (llevError, "input buffer overflow.");
363 destroy ();
355 return; 364 return;
356 } 365 }
357 366
358 amount = read (fd, inbuf + inbuf_len, amount); 367 amount = read (fd, rbuf, amount);
359 368
360 if (!amount) 369 if (!amount)
361 { 370 {
362 destroy (); 371 destroy ();
363 return; 372 return;
… …
371 return; 380 return;
372 } 381 }
373 382
374 // should not be here, normally 383 // should not be here, normally
375 } 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 }
376 else 499 else
377 { 500 {
378 inbuf_len += amount; 501 inbuf_len += amount;
379 502 inbuf_handle ();
380 cst_tot.ibytes += amount;
381 cst_lst.ibytes += amount;
382
383 cmd_ev.start ();
384 } 503 }
385 } 504 }
386}
387
388// called whenever we have additional commands to process
389void
390client::cmd_cb (iw &w)
391{
392 if (handle_packet ())
393 w.start ();
394 else
395 flush ();
396} 505}
397 506
398/******************************************************************************* 507/*******************************************************************************
399 * 508 *
400 * Start of write related routines. 509 * Start of write related routines.
… …
416 return; 525 return;
417 526
418 if (len + outputbuffer.len > SOCKETBUFSIZE) 527 if (len + outputbuffer.len > SOCKETBUFSIZE)
419 { 528 {
420 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);
421 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);
422 return; 533 return;
423 } 534 }
424 535
425 int avail, end; 536 int avail, end;
426 537
… …
454client::send_packet (packet &sl) 565client::send_packet (packet &sl)
455{ 566{
456 if (destroyed ()) 567 if (destroyed ())
457 return; 568 return;
458 569
459 if (sl.length () >= MAXSOCKBUF) 570 if (sl.length () > MAXSOCKBUF)
460 { 571 {
461 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 ());
462 /* 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
463 * it easier to debug. 574 * it easier to debug.
464 */ 575 */
… …
466 } 577 }
467 578
468 if (!sl.length ()) 579 if (!sl.length ())
469 return; 580 return;
470 581
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 {
471 assert (sl.hdrlen == 2); 638 assert (sl.hdrlen == 2);
472 639
473 sl.buf_ [0] = sl.length () >> 8; 640 sl.buf_ [0] = sl.length () >> 8;
474 sl.buf_ [1] = sl.length () ; 641 sl.buf_ [1] = sl.length () ;
475 642
476 send (sl.buf_, sl.length () + sl.hdrlen); 643 send (sl.buf_, sl.length () + sl.hdrlen);
644 }
477} 645}
478 646
479void 647void
480client::send_packet (const char *buf, int len) 648client::send_packet (const char *buf, int len)
481{ 649{
482 packet sl; 650 packet sl;
483 651
484 sl << data (buf, len); 652 sl << data_n (buf, len);
485 send_packet (sl); 653 send_packet (sl);
486} 654}
487 655
488void 656void
489client::send_packet (const char *buf) 657client::send_packet (const char *buf)
… …
502 va_end (ap); 670 va_end (ap);
503 671
504 send_packet (sl); 672 send_packet (sl);
505} 673}
506 674
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
507/*********************************************************************** 694/***********************************************************************
508 * 695 *
509 * packet functions/utilities 696 * packet functions/utilities
510 * 697 *
511 **********************************************************************/ 698 **********************************************************************/
… …
517 int len = strlen (name); 704 int len = strlen (name);
518 memcpy (cur, name, len); cur += len; 705 memcpy (cur, name, len); cur += len;
519 *cur++ = ' '; 706 *cur++ = ' ';
520} 707}
521 708
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
522packet &packet::operator <<(const data &v) 727packet &packet::operator <<(const data_n &v)
523{ 728{
524 if (room () < v.len) 729 if (room () < v.len)
525 reset (); 730 reset ();
526 else 731 else
527 { 732 {
… …
536} 741}
537 742
538packet &packet::operator <<(const data8 &v) 743packet &packet::operator <<(const data8 &v)
539{ 744{
540 unsigned int len = min (v.len, 0x00FF); 745 unsigned int len = min (v.len, 0x00FF);
541 return *this << uint8 (len) << data (v.ptr, len); 746 return *this << uint8 (len) << data_n (v.ptr, len);
542} 747}
543 748
544packet &packet::operator <<(const data16 &v) 749packet &packet::operator <<(const data16 &v)
545{ 750{
546 unsigned int len = min (v.len, 0xFFFF); 751 unsigned int len = min (v.len, 0xFFFF);
547 return *this << uint16 (len) << data (v.ptr, len); 752 return *this << uint16 (len) << data_n (v.ptr, len);
548} 753}
549 754
550packet &packet::operator <<(const char *v) 755packet &packet::operator <<(const char *v)
551{ 756{
552 return *this << data (v, strlen (v ? v : 0)); 757 return *this << data_n (v, v ? strlen (v) : 0);
553} 758}
554 759
555void 760void
556packet::vprintf (const char *format, va_list ap) 761packet::vprintf (const char *format, va_list ap)
557{ 762{
… …
563 return reset (); 768 return reset ();
564 769
565 cur += len; 770 cur += len;
566} 771}
567 772
568/******************************************************************************
569 *
570 * statistics logging functions.
571 *
572 ******************************************************************************/
573
574#ifdef CS_LOGSTATS
575
576/* cst_tot is for the life of the server, cst_last is for the last series of
577 * stats
578 */
579CS_Stats cst_tot, cst_lst;
580
581/**
582 * Writes out the gathered stats. We clear cst_lst.
583 */
584void
585write_cs_stats (void)
586{
587 time_t now = time (NULL);
588
589 /* If no connections recently, don't both to log anything */
590 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0)
591 return;
592
593 /* CSSTAT is put in so scripts can easily find the line */
594 LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
595 ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
596 now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
597 cst_lst.ibytes = 0;
598 cst_lst.obytes = 0;
599 cst_lst.time_start = now;
600}
601#endif
602

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