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Comparing deliantra/server/socket/lowlevel.C (file contents):
Revision 1.14 by root, Thu Dec 14 01:21:58 2006 UTC vs.
Revision 1.49 by root, Sun Jul 1 05:00:20 2007 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG.
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
7 it under the terms of the GNU General Public License as published by 8 * it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or 9 * the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version. 10 * (at your 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 GNU General Public License
17 along with this program; if not, write to the Free Software 18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 <crossfire@schmorp.de>
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// disconnect a socket after this many seconds without an ack
51// easily die in 20 seconds...
52#define SOCKET_TIMEOUT1 10 37#define SOCKET_TIMEOUT 8.
53#define SOCKET_TIMEOUT2 20
54 38
39// force a packet when idle for more than this many seconds,
40// forcing an ack regularly.
41#define IDLE_PING 2.
42
55void 43void
56Socket_Flush (NewSocket * ns) 44client::flush ()
57{ 45{
58#ifdef __linux__ 46 if (destroyed ())
47 return;
48
49#if HAVE_TCP_INFO
50 // check about once per second, spread evenly over all clients
51 // do this only when player is active
52 if (!((pticks + fd) & 7) && pl && pl->active)
53 {
59 // check time of last ack, and, if too old, kill connection 54 // check time of last ack, and, if too old, kill connection
60 struct tcp_info tcpi; 55 struct tcp_info tcpi;
61 socklen_t len = sizeof (tcpi); 56 socklen_t len = sizeof (tcpi);
62 57
63 if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) 58 if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi))
64 { 59 {
65 unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; 60 if (tcpi.tcpi_snd_mss)
61 mss = tcpi.tcpi_snd_mss;
66 62
67 if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s 63 rtt = tcpi.tcpi_rtt;
68 && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s 64 rttvar = tcpi.tcpi_rttvar;
65
66 if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000))
69 { 67 {
68 send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)");
69 write_outputbuffer ();
70
70 LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, 71 LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd,
71 (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); 72 (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked);
72 ns->status = Ns_Dead; 73 destroy ();
73 } 74 }
75 }
74 } 76 }
75
76 int val;
77
78 val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
79 val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val));
80#endif 77#endif
81}
82 78
83/*********************************************************************** 79 /**
84 * 80 * Writes data to socket.
85 * packet functions/utilities 81 *
86 * 82 * When the socket is clear to write, and we have backlogged data, this
87 **********************************************************************/ 83 * is called to write it out.
84 */
88 85
89packet &packet::operator <<(const data &v) 86 // write a nop to the socket at least every IDLE_NOP seconds.
90{ 87 if (!outputbuffer.len)
91 if (v.len)
92 {
93 memcpy (buf + len, v.ptr, v.len);
94 len += v.len;
95 } 88 {
89 if (last_send + IDLE_PING <= NOW && pl && pl->active)
90 {
91 // this is a bit ugly, but map1/map1a seem to be the only
92 // nop'able commands and they are quite small.
93 packet sl (mapmode == Map1Cmd ? "map1" : "map1a");
94 send_packet (sl);
95 }
96 else
97 return;
98 }
96 99
97 return *this; 100 if (socket_ev.poll () & PE_W)
98} 101 return;
99 102
100packet &packet::operator <<(const data8 &v) 103 last_send = NOW;
101{ 104 write_outputbuffer ();
102 unsigned int len = min (v.len, 0x00FF);
103 return *this << uint8 (len) << data (v.ptr, len);
104} 105}
105 106
106packet &packet::operator <<(const data16 &v)
107{
108 unsigned int len = min (v.len, 0xFFFF);
109 return *this << uint16 (len) << data (v.ptr, len);
110}
111
112packet &packet::operator <<(const char *v)
113{
114 return *this << data (v, strlen (v ? v : 0));
115}
116
117void 107void
118packet::printf (const char *format, ...) 108client::write_outputbuffer ()
119{ 109{
120 va_list ap; 110 while (outputbuffer.len)
121 va_start (ap, format); 111 {
112 int res = write (fd, outputbuffer.data + outputbuffer.start,
113 min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start));
122 114
123 len += vsnprintf ((char *)buf + len, MAXSOCKBUF, format, ap); 115 if (res > 0)
116 {
117 outputbuffer.start += res;
118 /* wrap back to start of buffer */
119 if (outputbuffer.start == SOCKETBUFSIZE)
120 outputbuffer.start = 0;
124 121
125 va_end (ap); 122 outputbuffer.len -= res;
123 }
124 else if (res == 0)
125 {
126 LOG (llevError, "socket write failed, connection closed.\n");
127 destroy ();
128 return;
129 }
130 else if (errno == EINTR)
131 {
132 // just retry
133 }
134 else if (errno == EAGAIN)
135 {
136 // delay till ready
137 socket_ev.poll (socket_ev.poll () | PE_W);
138 socket_ev.start ();
139 return;
140 }
141 else
142 {
143 LOG (llevError, "socket write failed: %s\n", strerror (errno));
144 destroy ();
145 return;
146 }
147 }
148
149 socket_ev.poll (socket_ev.poll () & ~PE_W);
126} 150}
127 151
128/****************************************************************************** 152/******************************************************************************
129 * 153 *
130 * Start of read routines. 154 * Start of read routines.
131 * 155 *
132 ******************************************************************************/ 156 ******************************************************************************/
133 157
134int 158int
135NewSocket::read_packet () 159client::next_packet ()
136{ 160{
137 for (;;)
138 {
139 if (inbuf_len >= 2) 161 if (inbuf_len >= 2)
140 { 162 {
141 unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; 163 int pkt_len = (inbuf [0] << 8) | inbuf [1];
142 164
143 if (inbuf_len >= 2 + pkt_len) 165 if (inbuf_len >= 2 + pkt_len)
144 return pkt_len + 2; 166 return 2 + pkt_len;
167
168 if (inbuf_len == sizeof (inbuf))
145 } 169 {
170 send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED);
171 destroy ();
172 return -1;
173 }
174 }
175
176 return 0;
177}
178
179void
180client::skip_packet (int len)
181{
182 inbuf_len -= len;
183 memmove (inbuf, inbuf + len, inbuf_len);
184}
185
186/*****************************************************************************
187 * Start of command dispatch area.
188 * The commands here are protocol commands.
189 ****************************************************************************/
190
191// SocketCommand, PlayingCommand, should not exist with those ugly casts
192#define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb),
193#define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER |
194
195/**
196 * Dispatch table for the server.
197 */
198static struct packet_type packets[] = {
199 {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 },
200 {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 },
201
202 {"examine", PC(ExamineCmd) PF_PLAYING },
203 {"ex", PC(ExCmd) PF_PLAYING },
204 {"apply", PC(ApplyCmd) PF_PLAYING },
205 {"lookat", PC(LookAt) PF_PLAYING },
206 {"lock", PC(LockItem) PF_PLAYING },
207 {"mark", PC(MarkItem) PF_PLAYING },
208 {"move", PC(MoveCmd) PF_PLAYING },
209 {"ext", PC(ExtCmd) 0 }, // CF+
210 {"mapredraw", PC(MapRedrawCmd) 0 },
211 {"mapinfo", PC(MapInfoCmd) 0 }, // CF+
212
213 {"reply", SC(ReplyCmd) 0 },
214 {"exti", SC(ExtiCmd) 0 }, // CF+
215 {"addme", SC(AddMeCmd) 0 },
216 {"askface", SC(AskFaceCmd) 0 },
217 {"requestinfo", SC(RequestInfo) 0 },
218 {"setfacemode", SC(SetFaceMode) 0 },
219 {"setsound", SC(SetSound) 0 },
220 {"setup", SC(SetUp) 0 },
221 {"version", SC(VersionCmd) 0 },
222 {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */
223 {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */
224 {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */
225};
226
227bool
228client::may_execute (const packet_type *pkt) const
229{
230 return (!(pkt->flags & PF_PLAYER) || pl)
231 && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING);
232}
233
234// HACK: some commands currently should be executed
235// even when the player is frozen. this hack detects
236// those commands. it should be folded into may_execute,
237// but kept seperate to emphasise the hack aspect, i.e.
238// do it better, then remove.
239static bool
240always_immediate (const client *ns, const packet_type *pkt, const char *data, int len)
241{
242 if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6)))
243 return false;
244
245 if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map)
246 return false;
247
248 if (pkt->flags & PF_COMMAND6)
249 {
250 data += 6;
251 len -= 6;
252 }
253
254 if (len > 4 && !strncmp (data, "say " , 4))
255 return true;
256 if (len > 5 && !strncmp (data, "chat ", 5))
257 return true;
258
259 return false;
260}
261
262void
263client::execute (const packet_type *pkt, char *data, int datalen)
264{
265 if (may_execute (pkt) || always_immediate (this, pkt, data, datalen))
266 {
267 //TODO: only one format
268 if (pkt->flags & PF_PLAYER)
269 ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl);
270 else
271 ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this);
272 }
273 else
274 send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name);
275}
276
277bool
278client::handle_packet ()
279{
280 int pkt_len = next_packet ();
281
282 if (!pkt_len)
283 return false;
284 else if (pkt_len < 0)
285 {
286 LOG (llevError, "read error on player %s\n",
287 pl && pl->ob ? &pl->ob->name : "[anonymous]");
288 destroy ();
289 return false;
290 }
291
292 inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */
293
294 /* First, break out beginning word. There are at least
295 * a few commands that do not have any paremeters. If
296 * we get such a command, don't worry about trying
297 * to break it up.
298 */
299 int datalen;
300 char *data = strchr ((char *)inbuf + 2, ' ');
301
302 if (data)
303 {
304 *data++ = 0;
305 datalen = pkt_len - (data - (char *)inbuf);
306 }
307 else
308 {
309 data = (char *)inbuf + 2; // better read garbage than segfault
310 datalen = 0;
311 }
312
313 for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt)
314 if (!strcmp ((char *)inbuf + 2, pkt->name))
315 {
316 if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen))
317 queue_command (pkt, data, datalen);
318 else
319 execute (pkt, data, datalen);
320
321 goto next_packet;
322 }
323
324 // If we get here, we didn't find a valid command.
325 send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2);
326next_packet:
327 skip_packet (pkt_len);
328
329 // input buffer has space again
330 socket_ev.poll (socket_ev.poll () | PE_R);
331
332 return true;
333}
334
335// callback called when socket is either readable or writable
336void
337client::socket_cb (iow &w, int got)
338{
339 //TODO remove when we have better socket cleanup logic
340 if (destroyed ())
341 {
342 socket_ev.poll (0);
343 return;
344 }
345
346 if (got & PE_W)
347 {
348 write_outputbuffer ();
349
350 if (!outputbuffer.len)
351 socket_ev.poll (socket_ev.poll () & ~PE_W);
352 }
353
354 if (got & PE_R)
355 {
356 //TODO: rate-limit tcp connection in better ways, important
146 357
147 int amount = sizeof (inbuf) - inbuf_len; 358 int amount = sizeof (inbuf) - inbuf_len;
148 359
149 if (amount <= 0) 360 if (!amount)
150 { 361 {
151 LOG (llevError, "packet too large");//TODO 362 // input buffer full
363 socket_ev.poll (socket_ev.poll () & ~PE_R);
152 return -1; 364 return;
153 } 365 }
154 366
155 amount = read (fd, inbuf + inbuf_len, amount); 367 amount = read (fd, inbuf + inbuf_len, amount);
156 368
157 if (!amount) 369 if (!amount)
158 { 370 {
159 status = Ns_Dead; 371 destroy ();
160 return -1; 372 return;
161 } 373 }
162 else if (amount < 0) 374 else if (amount < 0)
163 { 375 {
164 if (errno != EAGAIN && errno != EINTR) 376 if (errno != EAGAIN && errno != EINTR)
165 { 377 {
166 LOG (llevError, "read error: %s", strerror (errno)); 378 LOG (llevError, "read error: %s\n", strerror (errno));
379 destroy ();
167 return -1; 380 return;
168 } 381 }
169 382
170 return 0; 383 // should not be here, normally
384 }
385 else
171 } 386 {
172
173 inbuf_len += amount; 387 inbuf_len += amount;
174 388
175 cst_tot.ibytes += amount; 389 cmd_ev.start ();
176 cst_lst.ibytes += amount; 390 }
177 } 391 }
178} 392}
179 393
394// called whenever we have additional commands to process
180void 395void
181NewSocket::skip_packet (int len) 396client::cmd_cb (iw &w)
182{ 397{
183 inbuf_len -= len; 398 if (handle_packet ())
184 memmove (inbuf, inbuf + len, inbuf_len); 399 w.start ();
400 else
401 flush ();
185} 402}
186 403
187/******************************************************************************* 404/*******************************************************************************
188 * 405 *
189 * Start of write related routines. 406 * Start of write related routines.
… …
194 * Adds data to a socket buffer for whatever reason. 411 * Adds data to a socket buffer for whatever reason.
195 * 412 *
196 * ns is the socket we are adding the data to, buf is the start of the 413 * ns is the socket we are adding the data to, buf is the start of the
197 * data, and len is the number of bytes to add. 414 * data, and len is the number of bytes to add.
198 */ 415 */
199 416void
200static void 417client::send (void *buf_, int len)
201add_to_buffer (NewSocket *ns, char *buf, int len)
202{ 418{
419 char *buf = (char *)buf_;
420
421 if (destroyed () || !buf)
422 return;
423
424 if (len + outputbuffer.len > SOCKETBUFSIZE)
425 {
426 LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd);
427 // shutdown the socket, this is safer than destroying it immediately
428 // as lots of code in the callchain might still access the map etc.
429 shutdown (fd, SHUT_RDWR);
430 return;
431 }
432
203 int avail, end; 433 int avail, end;
204
205 if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE)
206 {
207 LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd);
208 ns->status = Ns_Dead;
209 return;
210 }
211 434
212 /* data + end is where we start putting the new data. The last byte 435 /* data + end is where we start putting the new data. The last byte
213 * currently in use is actually data + end -1 436 * currently in use is actually data + end -1
214 */ 437 */
215
216 end = ns->outputbuffer.start + ns->outputbuffer.len; 438 end = outputbuffer.start + outputbuffer.len;
217 /* The buffer is already in a wrapped state, so adjust end */ 439 /* The buffer is already in a wrapped state, so adjust end */
218 if (end >= SOCKETBUFSIZE) 440 if (end >= SOCKETBUFSIZE)
219 end -= SOCKETBUFSIZE; 441 end -= SOCKETBUFSIZE;
220 442
221 avail = SOCKETBUFSIZE - end; 443 avail = SOCKETBUFSIZE - end;
222 444
223 /* We can all fit it behind the current data without wrapping */ 445 /* We can all fit it behind the current data without wrapping */
224 if (avail >= len) 446 if (avail >= len)
225 memcpy (ns->outputbuffer.data + end, buf, len); 447 memcpy (outputbuffer.data + end, buf, len);
226 else 448 else
227 { 449 {
228 memcpy (ns->outputbuffer.data + end, buf, avail); 450 memcpy (outputbuffer.data + end, buf, avail);
229 memcpy (ns->outputbuffer.data, buf + avail, len - avail); 451 memcpy (outputbuffer.data, buf + avail, len - avail);
230 } 452 }
231 453
232 ns->outputbuffer.len += len; 454 outputbuffer.len += len;
233#if 0
234 LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start);
235#endif
236}
237
238/**
239 * Writes data to socket.
240 *
241 * When the socket is clear to write, and we have backlogged data, this
242 * is called to write it out.
243 */
244void
245write_socket_buffer (NewSocket * ns)
246{
247 int amt, max;
248
249 if (ns->outputbuffer.len == 0)
250 {
251 LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd);
252 return;
253 }
254
255 do
256 {
257 max = SOCKETBUFSIZE - ns->outputbuffer.start;
258 if (ns->outputbuffer.len < max)
259 max = ns->outputbuffer.len;
260
261 do
262 {
263 amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max);
264 }
265 while ((amt < 0) && (errno == EINTR));
266
267 if (amt < 0)
268 { /* We got an error */
269
270 if (errno != EWOULDBLOCK)
271 {
272 LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno));
273 ns->status = Ns_Dead;
274 return;
275 }
276 else
277 { /* EWOULDBLOCK */
278 /* can't write it, so store it away. */
279 ns->can_write = 0;
280 return;
281 }
282 }
283 ns->outputbuffer.start += amt;
284 /* wrap back to start of buffer */
285 if (ns->outputbuffer.start == SOCKETBUFSIZE)
286 ns->outputbuffer.start = 0;
287 ns->outputbuffer.len -= amt;
288#ifdef CS_LOGSTATS
289 cst_tot.obytes += amt;
290 cst_lst.obytes += amt;
291#endif
292 }
293 while (ns->outputbuffer.len > 0);
294}
295
296/**
297 * This writes data to the socket. - It is very low level -
298 * all we try and do is write out the data to the socket
299 * provided (ns). buf is the data to write, len is the number
300 * of bytes to write. IT doesn't return anything - rather, it
301 * updates the ns structure if we get an error.
302 */
303void
304Write_To_Socket (NewSocket * ns, char *buf, int len)
305{
306 int amt = 0;
307 char *pos = buf;
308
309 if (ns->status == Ns_Dead || !buf)
310 {
311 LOG (llevDebug, "Write_To_Socket called with dead socket\n");
312 return;
313 }
314
315#ifndef __GNU__ /* This caused problems on Hurd */
316 if (!ns->can_write)
317 {
318 add_to_buffer (ns, buf, len);
319 return;
320 }
321#endif
322 /* If we manage to write more than we wanted, take it as a bonus */
323 while (len > 0)
324 {
325
326 do
327 {
328 amt = write (ns->fd, pos, len);
329 }
330 while ((amt < 0) && (errno == EINTR));
331
332 if (amt < 0)
333 { /* We got an error */
334 if (errno != EWOULDBLOCK)
335 {
336 LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */
337 errno, strerror (errno));
338 ns->status = Ns_Dead;
339 return;
340 }
341 else
342 { /* EWOULDBLOCK */
343 /* can't write it, so store it away. */
344 add_to_buffer (ns, pos, len);
345 ns->can_write = 0;
346 return;
347 }
348 }
349 /* amt gets set to 0 above in blocking code, so we do this as
350 * an else if to make sure we don't reprocess it.
351 */
352 else if (amt == 0)
353 {
354 LOG (llevError, "Write_To_Socket: No data written out.\n");
355 }
356 len -= amt;
357 pos += amt;
358#ifdef CS_LOGSTATS
359 cst_tot.obytes += amt;
360 cst_lst.obytes += amt;
361#endif
362 }
363} 455}
364 456
365/** 457/**
366 * Takes a string of data, and writes it out to the socket. A very handy 458 * Takes a string of data, and writes it out to the socket. A very handy
367 * shortcut function. 459 * shortcut function.
368 */ 460 */
369
370void 461void
371NewSocket::send_packet (packet &sl) 462client::send_packet (packet &sl)
372{ 463{
373 Send_With_Handling (this, &sl); 464 if (destroyed ())
374}
375
376void
377NewSocket::send_packet (const char *buf, int len)
378{
379 packet sl;
380
381 sl << data (buf, len);
382 send_packet (sl);
383}
384
385void
386NewSocket::send_packet (const char *buf)
387{
388 send_packet (buf, strlen (buf));
389}
390
391/**
392 * Calls Write_To_Socket to send data to the client.
393 *
394 * The only difference in this function is that we take a packet
395 *, and we prepend the length information.
396 */
397void
398Send_With_Handling (NewSocket *ns, packet *msg)
399{
400 unsigned char sbuf[4];
401
402 if (ns->status == Ns_Dead || !msg)
403 return; 465 return;
404 466
405 if (msg->len >= MAXSOCKBUF) 467 if (sl.length () >= MAXSOCKBUF)
406 { 468 {
407 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); 469 LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ());
408 /* Almost certainly we've overflowed a buffer, so quite now to make 470 /* Almost certainly we've overflowed a buffer, so quit now to make
409 * it easier to debug. 471 * it easier to debug.
410 */ 472 */
411 abort (); 473 abort ();
412 } 474 }
413 sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF;
414 sbuf[1] = ((uint32) (msg->len)) & 0xFF;
415 if (ns->status != Ns_Old)
416 Write_To_Socket (ns, (char *) sbuf, 2);
417 Write_To_Socket (ns, (char *) msg->buf, msg->len);
418}
419 475
476 if (!sl.length ())
477 return;
478
479 assert (sl.hdrlen == 2);
480
481 sl.buf_ [0] = sl.length () >> 8;
482 sl.buf_ [1] = sl.length () ;
483
484 send (sl.buf_, sl.length () + sl.hdrlen);
485}
486
487void
488client::send_packet (const char *buf, int len)
489{
490 packet sl;
491
492 sl << data (buf, len);
493 send_packet (sl);
494}
495
496void
497client::send_packet (const char *buf)
498{
499 send_packet (buf, strlen (buf));
500}
501
502void
503client::send_packet_printf (const char *format, ...)
504{
505 packet sl;
506
507 va_list ap;
508 va_start (ap, format);
509 sl.vprintf (format, ap);
510 va_end (ap);
511
512 send_packet (sl);
513}
514
515// returns true when the message needs special (read: perl) treatment
516static bool
517msg_is_special (const char *msg)
518{
519 return msg [strcspn (msg, "<[&\n")];
520}
521
522void
523client::send_msg (int color, const char *type, const char *msg)
524{
525 if (msg_is_special (msg))
526 cfperl_send_msg (this, color, type, msg);
527 else if (can_msg)
528 send_packet_printf ("msg %d %s %s", color, type, msg);
529 else if (color < 0)
530 return; // client cannot handle this
531 else
532 send_packet_printf ("drawinfo %d %s", color, msg);
533}
534
535void
536client::send_drawinfo (const char *msg, int flags)
537{
538 send_msg (flags, "log", msg);
539}
540
420/****************************************************************************** 541/***********************************************************************
421 * 542 *
422 * statistics logging functions. 543 * packet functions/utilities
423 * 544 *
424 ******************************************************************************/ 545 **********************************************************************/
425 546
426#ifdef CS_LOGSTATS 547packet::packet (const char *name)
427
428/* cst_tot is for the life of the server, cst_last is for the last series of
429 * stats
430 */
431CS_Stats cst_tot, cst_lst;
432
433/**
434 * Writes out the gathered stats. We clear cst_lst.
435 */
436void
437write_cs_stats (void)
438{ 548{
439 time_t now = time (NULL); 549 reset ();
440 550
441 /* If no connections recently, don't both to log anything */ 551 int len = strlen (name);
442 if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) 552 memcpy (cur, name, len); cur += len;
443 return; 553 *cur++ = ' ';
444
445 /* CSSTAT is put in so scripts can easily find the line */
446 LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n",
447 ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn,
448 now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start);
449 cst_lst.ibytes = 0;
450 cst_lst.obytes = 0;
451 cst_lst.max_conn = socket_info.nconns;
452 cst_lst.time_start = now;
453} 554}
454#endif
455 555
556packet &packet::operator <<(const ber32 v)
557{
558 enum { maxlen = 32 / 7 + 1};
559 uint8 buf[maxlen];
560 uint8 *p = buf + maxlen;
561 uint32 val = v.val;
562
563 *--p = val & 0x7F;
564
565 while (val > 0x7F)
566 {
567 val >>= 7;
568 *--p = (val & 0x7F) | 0x80;
569 }
570
571 return *this << data (p, buf + maxlen - p);
572}
573
574packet &packet::operator <<(const data &v)
575{
576 if (room () < v.len)
577 reset ();
578 else
579 {
580 if (v.len)
581 {
582 memcpy (cur, v.ptr, v.len);
583 cur += v.len;
584 }
585 }
586
587 return *this;
588}
589
590packet &packet::operator <<(const data8 &v)
591{
592 unsigned int len = min (v.len, 0x00FF);
593 return *this << uint8 (len) << data (v.ptr, len);
594}
595
596packet &packet::operator <<(const data16 &v)
597{
598 unsigned int len = min (v.len, 0xFFFF);
599 return *this << uint16 (len) << data (v.ptr, len);
600}
601
602packet &packet::operator <<(const char *v)
603{
604 return *this << data (v, strlen (v ? v : 0));
605}
606
607void
608packet::vprintf (const char *format, va_list ap)
609{
610 int size = room ();
611
612 int len = vsnprintf ((char *)cur, size, format, ap);
613
614 if (len >= size)
615 return reset ();
616
617 cur += len;
618}
619

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