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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.21 by root, Fri Dec 15 00:14:13 2006 UTC vs.
Revision 1.43 by root, Sat Jun 9 22:54:04 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game.
3 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team
4 Copyright (C) 1992 Frank Tore Johansen 5 * Copyright (©) 1992,2007 Frank Tore Johansen
5 6 *
6 This program is free software; you can redistribute it and/or modify 7 * Crossfire TRT is free software; you can redistribute it and/or modify it
7 it under the terms of the GNU General Public License as published by 8 * under the terms of the GNU General Public License as published by the Free
8 the Free Software Foundation; either version 2 of the License, or 9 * Software Foundation; either version 2 of the License, or (at your option)
9 (at your option) any later version. 10 * 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, but
12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 GNU General Public License for more details. 15 * 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 GNU General Public License along
17 along with this program; if not, write to the Free Software 18 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 20 *
20 The author can be reached via e-mail to mark@pyramid.com 21 * The authors can be reached via e-mail to <crossfire@schmorp.de>
21*/ 22 */
22 23
23/** 24/**
24 * \file 25 * \file
25 * Low-level socket-related functions. 26 * Low-level socket-related functions.
26 * 27 *
… …
33 */ 34 */
34 35
35using namespace std; 36using namespace std;
36 37
37#include <global.h> 38#include <global.h>
38#include <newclient.h>
39#include <sproto.h> 39#include <sproto.h>
40#include <cstdarg> 40#include <cstdarg>
41 41
42#ifdef __linux__ 42#ifdef __linux__
43# include <sys/types.h> 43# include <sys/types.h>
44# include <sys/socket.h> 44# include <sys/socket.h>
45# include <netinet/in.h> 45# include <netinet/in.h>
46# define TCP_HZ 1000 // sorry...
47# include <netinet/tcp.h> 46# include <netinet/tcp.h>
48#endif 47#endif
49 48
50// use a really low timeout, as it doesn't cost any bandwidth, and you can 49// disconnect a socket after this many seconds without an ack
51// easily die in 20 seconds...
52#define SOCKET_TIMEOUT1 10 50#define SOCKET_TIMEOUT 8.
53#define SOCKET_TIMEOUT2 20
54 51
52// force a packet when idle for more than this many seconds,
53// forcing an ack regularly.
54#define IDLE_PING 2.
55
55void 56void
56client_socket::flush () 57client::flush ()
57{ 58{
59 if (destroyed ())
60 return;
61
58#ifdef __linux__ 62#ifdef __linux__
63 // check about once per second, spread evenly over all clients
64 if (!((pticks + fd) & 7))
65 {
59 // check time of last ack, and, if too old, kill connection 66 // check time of last ack, and, if too old, kill connection
60 struct tcp_info tcpi; 67 struct tcp_info tcpi;
61 socklen_t len = sizeof (tcpi); 68 socklen_t len = sizeof (tcpi);
62 69
63 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) 70 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
64 { 71 {
65 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent;
66
67 rtt = tcpi.tcpi_rtt; 72 rtt = tcpi.tcpi_rtt;
68 rttvar = tcpi.tcpi_rttvar; 73 rttvar = tcpi.tcpi_rttvar;
69 74
70 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s 75 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
71 && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s
72 { 76 {
77 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
78 write_outputbuffer ();
79
73 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, 80 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); 81 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
75 status = Ns_Dead; 82 destroy ();
83 }
76 } 84 }
77 } 85 }
78#endif 86#endif
79 87
80 /** 88 /**
… …
82 * 90 *
83 * When the socket is clear to write, and we have backlogged data, this 91 * When the socket is clear to write, and we have backlogged data, this
84 * is called to write it out. 92 * is called to write it out.
85 */ 93 */
86 94
87 if (!outputbuffer.len || socket_ev.poll () & PE_W) 95 // write a nop to the socket at least every IDLE_NOP seconds.
96 if (!outputbuffer.len)
97 {
98 if (last_send + IDLE_PING <= NOW)
99 {
100 // this is a bit ugly, but map1/map1a seem to be the only
101 // nop'able commands and they are quite small.
102 packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
103 send_packet (sl);
104 }
105 else
106 return;
107 }
108
109 if (socket_ev.poll () & PE_W)
88 return; 110 return;
89 111
112 last_send = NOW;
90 write_outputbuffer (); 113 write_outputbuffer ();
91} 114}
92 115
93void 116void
94client_socket::write_outputbuffer () 117client::write_outputbuffer ()
95{ 118{
96 while (outputbuffer.len) 119 while (outputbuffer.len)
97 { 120 {
98 int res = write (fd, outputbuffer.data + outputbuffer.start, 121 int res = write (fd, outputbuffer.data + outputbuffer.start,
99 min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); 122 min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
… …
104 /* wrap back to start of buffer */ 127 /* wrap back to start of buffer */
105 if (outputbuffer.start == SOCKETBUFSIZE) 128 if (outputbuffer.start == SOCKETBUFSIZE)
106 outputbuffer.start = 0; 129 outputbuffer.start = 0;
107 130
108 outputbuffer.len -= res; 131 outputbuffer.len -= res;
109#ifdef CS_LOGSTATS
110 cst_tot.obytes += res;
111 cst_lst.obytes += res;
112#endif
113 } 132 }
114 else if (res == 0) 133 else if (res == 0)
115 { 134 {
116 LOG (llevError, "socket write failed, connection closed.\n"); 135 LOG (llevError, "socket write failed, connection closed.\n");
117 status = Ns_Dead; 136 destroy ();
118 return; 137 return;
119 } 138 }
120 else if (errno == EINTR) 139 else if (errno == EINTR)
121 { 140 {
122 // just retry 141 // just retry
… …
129 return; 148 return;
130 } 149 }
131 else 150 else
132 { 151 {
133 LOG (llevError, "socket write failed: %s\n", strerror (errno)); 152 LOG (llevError, "socket write failed: %s\n", strerror (errno));
134 status = Ns_Dead; 153 destroy ();
135 return; 154 return;
136 } 155 }
137 } 156 }
138 157
139 socket_ev.poll (socket_ev.poll () & ~PE_W); 158 socket_ev.poll (socket_ev.poll () & ~PE_W);
140} 159}
141 160
161/******************************************************************************
162 *
163 * Start of read routines.
164 *
165 ******************************************************************************/
166
167int
168client::next_packet ()
169{
170 if (inbuf_len >= 2)
171 {
172 int pkt_len = (inbuf [0] << 8) | inbuf [1];
173
174 if (inbuf_len >= 2 + pkt_len)
175 return 2 + pkt_len;
176
177 if (inbuf_len == sizeof (inbuf))
178 {
179 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED);
180 destroy ();
181 return -1;
182 }
183 }
184
185 return 0;
186}
187
188void
189client::skip_packet (int len)
190{
191 inbuf_len -= len;
192 memmove (inbuf, inbuf + len, inbuf_len);
193}
194
142/*********************************************************************** 195/*****************************************************************************
143 * 196 * Start of command dispatch area.
144 * packet functions/utilities 197 * The commands here are protocol commands.
145 *
146 **********************************************************************/ 198 ****************************************************************************/
147 199
148packet &packet::operator <<(const data &v) 200// SocketCommand, PlayingCommand, should not exist with those ugly casts
201#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
202#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
203
204/**
205 * Dispatch table for the server.
206 */
207static struct packet_type packets[] = {
208 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
209 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 },
210
211 {"examine", PC(ExamineCmd) PF_PLAYING },
212 {"ex", PC(ExCmd) PF_PLAYING },
213 {"apply", PC(ApplyCmd) PF_PLAYING },
214 {"lookat", PC(LookAt) PF_PLAYING },
215 {"lock", PC(LockItem) PF_PLAYING },
216 {"mark", PC(MarkItem) PF_PLAYING },
217 {"move", PC(MoveCmd) PF_PLAYING },
218 {"ext", PC(ExtCmd) 0 }, // CF+
219 {"mapredraw", PC(MapRedrawCmd) 0 },
220 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+
221
222 {"reply", SC(ReplyCmd) 0 },
223 {"exti", SC(ExtiCmd) 0 }, // CF+
224 {"addme", SC(AddMeCmd) 0 },
225 {"askface", SC(AskFaceCmd) 0 },
226 {"requestinfo", SC(RequestInfo) 0 },
227 {"setfacemode", SC(SetFaceMode) 0 },
228 {"setsound", SC(SetSound) 0 },
229 {"setup", SC(SetUp) 0 },
230 {"version", SC(VersionCmd) 0 },
231 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
232 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
233 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
234};
235
236bool
237client::may_execute (const packet_type *pkt) const
149{ 238{
150 if (room () < v.len) 239 return (!(pkt->flags & PF_PLAYER) || pl)
151 reset (); 240 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
241}
242
243// HACK: some commands currently should be executed
244// even when the player is frozen. this hack detects
245// those commands. it should be folded into may_execute,
246// but kept seperate to emphasise the hack aspect, i.e.
247// do it better, then remove.
248static bool
249always_immediate (const client *ns, const packet_type *pkt, const char *data, int len)
250{
251 if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6)))
252 return false;
253
254 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
255 return false;
256
257 if (pkt->flags & PF_COMMAND6)
258 {
259 data += 6;
260 len -= 6;
261 }
262
263 if (len > 4 && !strncmp (data, "say " , 4))
264 return true;
265 if (len > 5 && !strncmp (data, "chat ", 5))
266 return true;
267
268 return false;
269}
270
271void
272client::execute (const packet_type *pkt, char *data, int datalen)
273{
274 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
275 {
276 //TODO: only one format
277 if (pkt->flags & PF_PLAYER)
278 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
279 else
280 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
281 }
152 else 282 else
283 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name);
284}
285
286bool
287client::handle_packet ()
288{
289 int pkt_len = next_packet ();
290
291 if (!pkt_len)
292 return false;
293 else if (pkt_len < 0)
294 {
295 LOG (llevError, "read error on player %s\n",
296 pl && pl->ob ? &pl->ob->name : "[anonymous]");
297 destroy ();
298 return false;
153 { 299 }
154 if (v.len) 300
301 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
302
303 /* First, break out beginning word. There are at least
304 * a few commands that do not have any paremeters. If
305 * we get such a command, don't worry about trying
306 * to break it up.
307 */
308 int datalen;
309 char *data = strchr ((char *)inbuf + 2, ' ');
310
311 if (data)
312 {
313 *data++ = 0;
314 datalen = pkt_len - (data - (char *)inbuf);
315 }
316 else
317 {
318 data = (char *)inbuf + 2; // better read garbage than segfault
319 datalen = 0;
320 }
321
322 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
323 if (!strcmp ((char *)inbuf + 2, pkt->name))
155 { 324 {
156 memcpy (cur, v.ptr, v.len); 325 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
157 cur += v.len; 326 queue_command (pkt, data, datalen);
327 else
328 execute (pkt, data, datalen);
329
330 goto next_packet;
158 } 331 }
332
333 // If we get here, we didn't find a valid command.
334 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
335next_packet:
336 skip_packet (pkt_len);
337
338 // input buffer has space again
339 socket_ev.poll (socket_ev.poll () | PE_R);
340
341 return true;
342}
343
344// callback called when socket is either readable or writable
345void
346client::socket_cb (iow &w, int got)
347{
348 //TODO remove when we have better socket cleanup logic
349 if (destroyed ())
159 } 350 {
160 351 socket_ev.poll (0);
161 return *this; 352 return;
162}
163
164packet &packet::operator <<(const data8 &v)
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
182packet::printf (const char *format, ...)
183{
184 int size = room ();
185
186 va_list ap;
187 va_start (ap, format);
188 int len = vsnprintf ((char *)cur, size, format, ap);
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 { 353 }
208 if (inbuf_len >= 2)
209 {
210 unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1];
211 354
212 if (inbuf_len >= 2 + pkt_len) 355 if (got & PE_W)
213 return pkt_len + 2; 356 {
214 } 357 write_outputbuffer ();
358
359 if (!outputbuffer.len)
360 socket_ev.poll (socket_ev.poll () & ~PE_W);
361 }
362
363 if (got & PE_R)
364 {
365 //TODO: rate-limit tcp connection in better ways, important
215 366
216 int amount = sizeof (inbuf) - inbuf_len; 367 int amount = sizeof (inbuf) - inbuf_len;
217 368
218 if (amount <= 0) 369 if (!amount)
219 { 370 {
220 LOG (llevError, "packet too large");//TODO 371 // input buffer full
372 socket_ev.poll (socket_ev.poll () & ~PE_R);
221 return -1; 373 return;
222 } 374 }
223 375
224 amount = read (fd, inbuf + inbuf_len, amount); 376 amount = read (fd, inbuf + inbuf_len, amount);
225 377
226 if (!amount) 378 if (!amount)
227 { 379 {
228 status = Ns_Dead; 380 destroy ();
229 return -1; 381 return;
230 } 382 }
231 else if (amount < 0) 383 else if (amount < 0)
232 { 384 {
233 if (errno != EAGAIN && errno != EINTR) 385 if (errno != EAGAIN && errno != EINTR)
234 { 386 {
235 LOG (llevError, "read error: %s\n", strerror (errno)); 387 LOG (llevError, "read error: %s\n", strerror (errno));
388 destroy ();
236 return -1; 389 return;
237 } 390 }
238 391
239 return 0; 392 // should not be here, normally
393 }
394 else
240 } 395 {
241
242 inbuf_len += amount; 396 inbuf_len += amount;
243 397
244 cst_tot.ibytes += amount; 398 cmd_ev.start ();
245 cst_lst.ibytes += amount; 399 }
246 } 400 }
247} 401}
248 402
403// called whenever we have additional commands to process
249void 404void
250client_socket::skip_packet (int len) 405client::cmd_cb (iw &w)
251{ 406{
252 inbuf_len -= len; 407 if (handle_packet ())
253 memmove (inbuf, inbuf + len, inbuf_len); 408 w.start ();
409 else
410 flush ();
254} 411}
255 412
256/******************************************************************************* 413/*******************************************************************************
257 * 414 *
258 * Start of write related routines. 415 * Start of write related routines.
… …
264 * 421 *
265 * ns is the socket we are adding the data to, buf is the start of the 422 * 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. 423 * data, and len is the number of bytes to add.
267 */ 424 */
268void 425void
269client_socket::send (void *buf_, int len) 426client::send (void *buf_, int len)
270{ 427{
271 char *buf = (char *)buf_; 428 char *buf = (char *)buf_;
272 char *pos = buf;
273 int amt = 0;
274 429
275 if (status == Ns_Dead || !buf) 430 if (destroyed () || !buf)
276 {
277 LOG (llevDebug, "Write_To_Socket called with dead socket\n");
278 return; 431 return;
279 }
280 432
281 if ((len + outputbuffer.len) > SOCKETBUFSIZE) 433 if (len + outputbuffer.len > SOCKETBUFSIZE)
282 { 434 {
283 LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", fd); 435 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
284 status = Ns_Dead; 436 // shutdown the socket, this is safer than destroying it immediately
437 // as lots of code in the callchain might still access the map etc.
438 shutdown (fd, SHUT_RDWR);
285 return; 439 return;
286 } 440 }
287 441
288 int avail, end; 442 int avail, end;
289 443
… …
307 } 461 }
308 462
309 outputbuffer.len += len; 463 outputbuffer.len += len;
310} 464}
311 465
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/** 466/**
322 * Takes a string of data, and writes it out to the socket. A very handy 467 * Takes a string of data, and writes it out to the socket. A very handy
323 * shortcut function. 468 * shortcut function.
324 */ 469 */
325void 470void
326client_socket::send_packet (packet &sl) 471client::send_packet (packet &sl)
327{ 472{
328 if (status == Ns_Dead) 473 if (destroyed ())
329 return; 474 return;
330 475
331 if (sl.length () >= MAXSOCKBUF) 476 if (sl.length () >= MAXSOCKBUF)
332 { 477 {
333 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); 478 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
… …
347 492
348 send (sl.buf_, sl.length () + sl.hdrlen); 493 send (sl.buf_, sl.length () + sl.hdrlen);
349} 494}
350 495
351void 496void
352client_socket::send_packet (const char *buf, int len) 497client::send_packet (const char *buf, int len)
353{ 498{
354 packet sl; 499 packet sl;
355 500
356 sl << data (buf, len); 501 sl << data (buf, len);
357 send_packet (sl); 502 send_packet (sl);
358} 503}
359 504
360void 505void
361client_socket::send_packet (const char *buf) 506client::send_packet (const char *buf)
362{ 507{
363 send_packet (buf, strlen (buf)); 508 send_packet (buf, strlen (buf));
364} 509}
365 510
511void
512client::send_packet_printf (const char *format, ...)
513{
514 packet sl;
515
516 va_list ap;
517 va_start (ap, format);
518 sl.vprintf (format, ap);
519 va_end (ap);
520
521 send_packet (sl);
522}
523
524void
525client::send_drawinfo (const char *msg, int flags)
526{
527 send_packet_printf ("drawinfo %d %s", flags, msg);
528}
529
530void
531client::send_msg (int color, const char *type, const char *msg)
532{
533 if (can_msg)
534 send_packet_printf ("msg %d %s %s", color, type, msg);
535 else if (color < 0)
536 return; // client cannot handle this
537 else if (strchr (msg, '<') || strchr (msg, '&'))
538 {
539 //TODO: should escape/modify to old syntax
540 send_packet_printf ("drawinfo %d %s", color, msg);
541 }
542 else
543 send_packet_printf ("drawinfo %d %s", color, msg);
544}
545
366/****************************************************************************** 546/***********************************************************************
367 * 547 *
368 * statistics logging functions. 548 * packet functions/utilities
369 * 549 *
370 ******************************************************************************/ 550 **********************************************************************/
371 551
372#ifdef CS_LOGSTATS 552packet::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{ 553{
385 time_t now = time (NULL); 554 reset ();
386 555
387 /* If no connections recently, don't both to log anything */ 556 int len = strlen (name);
388 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) 557 memcpy (cur, name, len); cur += len;
389 return; 558 *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} 559}
399#endif
400 560
561packet &packet::operator <<(const ber32 v)
562{
563 enum { maxlen = 32 / 7 + 1};
564 uint8 buf[maxlen];
565 uint8 *p = buf + maxlen;
566 uint32 val = v.val;
567
568 *--p = val & 0x7F;
569
570 while (val > 0x7F)
571 {
572 val >>= 7;
573 *--p = (val & 0x7F) | 0x80;
574 }
575
576 return *this << data (p, buf + maxlen - p);
577}
578
579packet &packet::operator <<(const data &v)
580{
581 if (room () < v.len)
582 reset ();
583 else
584 {
585 if (v.len)
586 {
587 memcpy (cur, v.ptr, v.len);
588 cur += v.len;
589 }
590 }
591
592 return *this;
593}
594
595packet &packet::operator <<(const data8 &v)
596{
597 unsigned int len = min (v.len, 0x00FF);
598 return *this << uint8 (len) << data (v.ptr, len);
599}
600
601packet &packet::operator <<(const data16 &v)
602{
603 unsigned int len = min (v.len, 0xFFFF);
604 return *this << uint16 (len) << data (v.ptr, len);
605}
606
607packet &packet::operator <<(const char *v)
608{
609 return *this << data (v, strlen (v ? v : 0));
610}
611
612void
613packet::vprintf (const char *format, va_list ap)
614{
615 int size = room ();
616
617 int len = vsnprintf ((char *)cur, size, format, ap);
618
619 if (len >= size)
620 return reset ();
621
622 cur += len;
623}
624

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