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 | The author can be reached via e-mail to mark@pyramid.com |
|
|
21 | */ |
|
|
22 | |
|
|
23 | /** |
|
|
24 | * \file |
|
|
25 | * Low-level socket-related functions. |
|
|
26 | * |
20 | * |
27 | * \date 2003-12-02 |
21 | * The authors can be reached via e-mail to <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 | */ |
22 | */ |
34 | |
23 | |
35 | using namespace std; |
24 | using namespace std; |
36 | |
25 | |
37 | #include <global.h> |
26 | #include <global.h> |
38 | #include <sproto.h> |
27 | #include <sproto.h> |
39 | #include <cstdarg> |
28 | #include <cstdarg> |
40 | |
29 | |
41 | #ifdef __linux__ |
30 | #if HAVE_TCP_INFO |
42 | # include <sys/types.h> |
31 | # include <sys/types.h> |
43 | # include <sys/socket.h> |
32 | # include <sys/socket.h> |
44 | # include <netinet/in.h> |
33 | # include <netinet/in.h> |
45 | # define TCP_HZ 1000 // sorry... |
|
|
46 | # include <netinet/tcp.h> |
34 | # include <netinet/tcp.h> |
47 | #endif |
35 | #endif |
48 | |
36 | |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
37 | // disconnect a socket after this many seconds without an ack |
50 | // easily die in 20 seconds... |
|
|
51 | #define SOCKET_TIMEOUT1 10 |
38 | #define SOCKET_TIMEOUT 8. |
52 | #define SOCKET_TIMEOUT2 20 |
39 | |
|
|
40 | // force a packet when idle for more than this many seconds, |
|
|
41 | // forcing an ack regularly. |
|
|
42 | #define IDLE_PING 2. |
53 | |
43 | |
54 | void |
44 | void |
55 | client::flush () |
45 | client::flush () |
56 | { |
46 | { |
57 | #ifdef __linux__ |
47 | if (destroyed ()) |
|
|
48 | return; |
|
|
49 | |
|
|
50 | #if HAVE_TCP_INFO |
|
|
51 | // check about once per second, spread evenly over all clients |
|
|
52 | // do this only when player is active |
|
|
53 | if (!((pticks + fd) & 7) && pl && pl->active) |
|
|
54 | { |
58 | // check time of last ack, and, if too old, kill connection |
55 | // check time of last ack, and, if too old, kill connection |
59 | struct tcp_info tcpi; |
56 | struct tcp_info tcpi; |
60 | socklen_t len = sizeof (tcpi); |
57 | socklen_t len = sizeof (tcpi); |
61 | |
58 | |
62 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
59 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
63 | { |
60 | { |
64 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
61 | if (tcpi.tcpi_snd_mss) |
|
|
62 | mss = tcpi.tcpi_snd_mss; |
65 | |
63 | |
66 | rtt = tcpi.tcpi_rtt; |
64 | rtt = tcpi.tcpi_rtt; |
67 | rttvar = tcpi.tcpi_rttvar; |
65 | rttvar = tcpi.tcpi_rttvar; |
68 | |
66 | |
69 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
67 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
70 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
|
|
71 | { |
68 | { |
|
|
69 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
|
|
70 | write_outputbuffer (); |
|
|
71 | |
72 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
72 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
73 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
73 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
74 | status = Ns_Dead; |
74 | destroy (); |
|
|
75 | } |
75 | } |
76 | } |
76 | } |
77 | } |
77 | #endif |
78 | #endif |
78 | |
79 | |
79 | /** |
80 | /** |
… | |
… | |
81 | * |
82 | * |
82 | * When the socket is clear to write, and we have backlogged data, this |
83 | * When the socket is clear to write, and we have backlogged data, this |
83 | * is called to write it out. |
84 | * is called to write it out. |
84 | */ |
85 | */ |
85 | |
86 | |
86 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
87 | // write a nop to the socket at least every IDLE_NOP seconds. |
|
|
88 | if (!outputbuffer.len) |
|
|
89 | { |
|
|
90 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
|
|
91 | { |
|
|
92 | // this is a bit ugly, but map1/map1a seem to be the only |
|
|
93 | // nop'able commands and they are quite small. |
|
|
94 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
|
|
95 | send_packet (sl); |
|
|
96 | } |
|
|
97 | else |
|
|
98 | return; |
|
|
99 | } |
|
|
100 | |
|
|
101 | if (socket_ev.poll () & PE_W) |
87 | return; |
102 | return; |
88 | |
103 | |
|
|
104 | last_send = NOW; |
89 | write_outputbuffer (); |
105 | write_outputbuffer (); |
90 | } |
106 | } |
91 | |
107 | |
92 | void |
108 | void |
93 | client::write_outputbuffer () |
109 | client::write_outputbuffer () |
… | |
… | |
103 | /* wrap back to start of buffer */ |
119 | /* wrap back to start of buffer */ |
104 | if (outputbuffer.start == SOCKETBUFSIZE) |
120 | if (outputbuffer.start == SOCKETBUFSIZE) |
105 | outputbuffer.start = 0; |
121 | outputbuffer.start = 0; |
106 | |
122 | |
107 | outputbuffer.len -= res; |
123 | outputbuffer.len -= res; |
108 | #ifdef CS_LOGSTATS |
|
|
109 | cst_tot.obytes += res; |
|
|
110 | cst_lst.obytes += res; |
|
|
111 | #endif |
|
|
112 | } |
124 | } |
113 | else if (res == 0) |
125 | else if (res == 0) |
114 | { |
126 | { |
115 | LOG (llevError, "socket write failed, connection closed.\n"); |
127 | LOG (llevError, "socket write failed, connection closed.\n"); |
116 | status = Ns_Dead; |
128 | destroy (); |
117 | return; |
129 | return; |
118 | } |
130 | } |
119 | else if (errno == EINTR) |
131 | else if (errno == EINTR) |
120 | { |
132 | { |
121 | // just retry |
133 | // just retry |
… | |
… | |
128 | return; |
140 | return; |
129 | } |
141 | } |
130 | else |
142 | else |
131 | { |
143 | { |
132 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
144 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
133 | status = Ns_Dead; |
145 | destroy (); |
134 | return; |
146 | return; |
135 | } |
147 | } |
136 | } |
148 | } |
137 | |
149 | |
138 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
150 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
139 | } |
|
|
140 | |
|
|
141 | /*********************************************************************** |
|
|
142 | * |
|
|
143 | * packet functions/utilities |
|
|
144 | * |
|
|
145 | **********************************************************************/ |
|
|
146 | |
|
|
147 | packet &packet::operator <<(const data &v) |
|
|
148 | { |
|
|
149 | if (room () < v.len) |
|
|
150 | reset (); |
|
|
151 | else |
|
|
152 | { |
|
|
153 | if (v.len) |
|
|
154 | { |
|
|
155 | memcpy (cur, v.ptr, v.len); |
|
|
156 | cur += v.len; |
|
|
157 | } |
|
|
158 | } |
|
|
159 | |
|
|
160 | return *this; |
|
|
161 | } |
|
|
162 | |
|
|
163 | packet &packet::operator <<(const data8 &v) |
|
|
164 | { |
|
|
165 | unsigned int len = min (v.len, 0x00FF); |
|
|
166 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
167 | } |
|
|
168 | |
|
|
169 | packet &packet::operator <<(const data16 &v) |
|
|
170 | { |
|
|
171 | unsigned int len = min (v.len, 0xFFFF); |
|
|
172 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
173 | } |
|
|
174 | |
|
|
175 | packet &packet::operator <<(const char *v) |
|
|
176 | { |
|
|
177 | return *this << data (v, strlen (v ? v : 0)); |
|
|
178 | } |
|
|
179 | |
|
|
180 | void |
|
|
181 | packet::printf (const char *format, ...) |
|
|
182 | { |
|
|
183 | int size = room (); |
|
|
184 | |
|
|
185 | va_list ap; |
|
|
186 | va_start (ap, format); |
|
|
187 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
188 | va_end (ap); |
|
|
189 | |
|
|
190 | if (len >= size) |
|
|
191 | return reset (); |
|
|
192 | |
|
|
193 | cur += len; |
|
|
194 | } |
151 | } |
195 | |
152 | |
196 | /****************************************************************************** |
153 | /****************************************************************************** |
197 | * |
154 | * |
198 | * Start of read routines. |
155 | * Start of read routines. |
199 | * |
156 | * |
200 | ******************************************************************************/ |
157 | ******************************************************************************/ |
201 | |
158 | |
202 | int |
159 | int |
203 | client::read_packet () |
160 | client::next_packet () |
204 | { |
161 | { |
205 | for (;;) |
|
|
206 | { |
|
|
207 | if (inbuf_len >= 2) |
162 | if (inbuf_len >= 2) |
208 | { |
163 | { |
209 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
164 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
210 | |
165 | |
211 | if (inbuf_len >= 2 + pkt_len) |
166 | if (inbuf_len >= 2 + pkt_len) |
212 | return pkt_len + 2; |
167 | return 2 + pkt_len; |
|
|
168 | |
|
|
169 | if (inbuf_len == sizeof (inbuf)) |
213 | } |
170 | { |
|
|
171 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
|
|
172 | destroy (); |
|
|
173 | return -1; |
|
|
174 | } |
|
|
175 | } |
|
|
176 | |
|
|
177 | return 0; |
|
|
178 | } |
|
|
179 | |
|
|
180 | void |
|
|
181 | client::skip_packet (int len) |
|
|
182 | { |
|
|
183 | inbuf_len -= len; |
|
|
184 | memmove (inbuf, inbuf + len, inbuf_len); |
|
|
185 | } |
|
|
186 | |
|
|
187 | /***************************************************************************** |
|
|
188 | * Start of command dispatch area. |
|
|
189 | * The commands here are protocol commands. |
|
|
190 | ****************************************************************************/ |
|
|
191 | |
|
|
192 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
|
|
193 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
|
|
194 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
|
|
195 | |
|
|
196 | /** |
|
|
197 | * Dispatch table for the server. |
|
|
198 | */ |
|
|
199 | static struct packet_type packets[] = { |
|
|
200 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
|
|
201 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
|
|
202 | |
|
|
203 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
|
|
204 | {"ex", PC(ExCmd) PF_PLAYING }, |
|
|
205 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
|
|
206 | {"lookat", PC(LookAt) PF_PLAYING }, |
|
|
207 | {"lock", PC(LockItem) PF_PLAYING }, |
|
|
208 | {"mark", PC(MarkItem) PF_PLAYING }, |
|
|
209 | {"move", PC(MoveCmd) PF_PLAYING }, |
|
|
210 | {"ext", PC(ExtCmd) 0 }, // CF+ |
|
|
211 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
|
|
212 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
|
|
213 | |
|
|
214 | {"reply", SC(ReplyCmd) 0 }, |
|
|
215 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
|
|
216 | {"addme", SC(AddMeCmd) 0 }, |
|
|
217 | {"askface", SC(AskFaceCmd) 0 }, |
|
|
218 | {"requestinfo", SC(RequestInfo) 0 }, |
|
|
219 | {"setfacemode", SC(SetFaceMode) 0 }, |
|
|
220 | {"setsound", SC(SetSound) 0 }, |
|
|
221 | {"setup", SC(SetUp) 0 }, |
|
|
222 | {"version", SC(VersionCmd) 0 }, |
|
|
223 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
|
|
224 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
|
|
225 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
|
|
226 | }; |
|
|
227 | |
|
|
228 | bool |
|
|
229 | client::may_execute (const packet_type *pkt) const |
|
|
230 | { |
|
|
231 | return (!(pkt->flags & PF_PLAYER) || pl) |
|
|
232 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
|
|
233 | } |
|
|
234 | |
|
|
235 | // HACK: some commands currently should be executed |
|
|
236 | // even when the player is frozen. this hack detects |
|
|
237 | // those commands. it should be folded into may_execute, |
|
|
238 | // but kept seperate to emphasise the hack aspect, i.e. |
|
|
239 | // do it better, then remove. |
|
|
240 | static bool |
|
|
241 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
|
|
242 | { |
|
|
243 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
|
|
244 | return false; |
|
|
245 | |
|
|
246 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
|
|
247 | return false; |
|
|
248 | |
|
|
249 | if (pkt->flags & PF_COMMAND6) |
|
|
250 | { |
|
|
251 | data += 6; |
|
|
252 | len -= 6; |
|
|
253 | } |
|
|
254 | |
|
|
255 | if (len > 4 && !strncmp (data, "say " , 4)) |
|
|
256 | return true; |
|
|
257 | if (len > 5 && !strncmp (data, "chat ", 5)) |
|
|
258 | return true; |
|
|
259 | |
|
|
260 | return false; |
|
|
261 | } |
|
|
262 | |
|
|
263 | void |
|
|
264 | client::execute (const packet_type *pkt, char *data, int datalen) |
|
|
265 | { |
|
|
266 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
|
|
267 | { |
|
|
268 | //TODO: only one format |
|
|
269 | if (pkt->flags & PF_PLAYER) |
|
|
270 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
|
|
271 | else |
|
|
272 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
|
|
273 | } |
|
|
274 | else |
|
|
275 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
|
|
276 | } |
|
|
277 | |
|
|
278 | bool |
|
|
279 | client::handle_packet () |
|
|
280 | { |
|
|
281 | int pkt_len = next_packet (); |
|
|
282 | |
|
|
283 | if (!pkt_len) |
|
|
284 | return false; |
|
|
285 | else if (pkt_len < 0) |
|
|
286 | { |
|
|
287 | LOG (llevError, "read error on player %s\n", |
|
|
288 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
|
|
289 | destroy (); |
|
|
290 | return false; |
|
|
291 | } |
|
|
292 | |
|
|
293 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
|
|
294 | |
|
|
295 | /* First, break out beginning word. There are at least |
|
|
296 | * a few commands that do not have any paremeters. If |
|
|
297 | * we get such a command, don't worry about trying |
|
|
298 | * to break it up. |
|
|
299 | */ |
|
|
300 | int datalen; |
|
|
301 | char *data = strchr ((char *)inbuf + 2, ' '); |
|
|
302 | |
|
|
303 | if (data) |
|
|
304 | { |
|
|
305 | *data++ = 0; |
|
|
306 | datalen = pkt_len - (data - (char *)inbuf); |
|
|
307 | } |
|
|
308 | else |
|
|
309 | { |
|
|
310 | data = (char *)inbuf + 2; // better read garbage than segfault |
|
|
311 | datalen = 0; |
|
|
312 | } |
|
|
313 | |
|
|
314 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
|
|
315 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
|
|
316 | { |
|
|
317 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
|
|
318 | queue_command (pkt, data, datalen); |
|
|
319 | else |
|
|
320 | execute (pkt, data, datalen); |
|
|
321 | |
|
|
322 | goto next_packet; |
|
|
323 | } |
|
|
324 | |
|
|
325 | // If we get here, we didn't find a valid command. |
|
|
326 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
|
|
327 | next_packet: |
|
|
328 | skip_packet (pkt_len); |
|
|
329 | |
|
|
330 | // input buffer has space again |
|
|
331 | socket_ev.poll (socket_ev.poll () | PE_R); |
|
|
332 | |
|
|
333 | return true; |
|
|
334 | } |
|
|
335 | |
|
|
336 | // callback called when socket is either readable or writable |
|
|
337 | void |
|
|
338 | client::socket_cb (iow &w, int got) |
|
|
339 | { |
|
|
340 | //TODO remove when we have better socket cleanup logic |
|
|
341 | if (destroyed ()) |
|
|
342 | { |
|
|
343 | socket_ev.poll (0); |
|
|
344 | return; |
|
|
345 | } |
|
|
346 | |
|
|
347 | if (got & PE_W) |
|
|
348 | { |
|
|
349 | write_outputbuffer (); |
|
|
350 | |
|
|
351 | if (!outputbuffer.len) |
|
|
352 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
353 | } |
|
|
354 | |
|
|
355 | if (got & PE_R) |
|
|
356 | { |
|
|
357 | //TODO: rate-limit tcp connection in better ways, important |
214 | |
358 | |
215 | int amount = sizeof (inbuf) - inbuf_len; |
359 | int amount = sizeof (inbuf) - inbuf_len; |
216 | |
360 | |
217 | if (amount <= 0) |
361 | if (!amount) |
218 | { |
362 | { |
219 | LOG (llevError, "packet too large");//TODO |
363 | // input buffer full |
|
|
364 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
220 | return -1; |
365 | return; |
221 | } |
366 | } |
222 | |
367 | |
223 | amount = read (fd, inbuf + inbuf_len, amount); |
368 | amount = read (fd, inbuf + inbuf_len, amount); |
224 | |
369 | |
225 | if (!amount) |
370 | if (!amount) |
226 | { |
371 | { |
227 | status = Ns_Dead; |
372 | destroy (); |
228 | return -1; |
373 | return; |
229 | } |
374 | } |
230 | else if (amount < 0) |
375 | else if (amount < 0) |
231 | { |
376 | { |
232 | if (errno != EAGAIN && errno != EINTR) |
377 | if (errno != EAGAIN && errno != EINTR) |
233 | { |
378 | { |
234 | LOG (llevError, "read error: %s\n", strerror (errno)); |
379 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
380 | destroy (); |
235 | return -1; |
381 | return; |
236 | } |
382 | } |
237 | |
383 | |
238 | return 0; |
384 | // should not be here, normally |
|
|
385 | } |
|
|
386 | else |
239 | } |
387 | { |
240 | |
|
|
241 | inbuf_len += amount; |
388 | inbuf_len += amount; |
242 | |
389 | |
243 | cst_tot.ibytes += amount; |
390 | cmd_ev.start (); |
244 | cst_lst.ibytes += amount; |
391 | } |
245 | } |
392 | } |
246 | } |
393 | } |
247 | |
394 | |
|
|
395 | // called whenever we have additional commands to process |
248 | void |
396 | void |
249 | client::skip_packet (int len) |
397 | client::cmd_cb (iw &w) |
250 | { |
398 | { |
251 | inbuf_len -= len; |
399 | if (handle_packet ()) |
252 | memmove (inbuf, inbuf + len, inbuf_len); |
400 | w.start (); |
|
|
401 | else |
|
|
402 | flush (); |
253 | } |
403 | } |
254 | |
404 | |
255 | /******************************************************************************* |
405 | /******************************************************************************* |
256 | * |
406 | * |
257 | * Start of write related routines. |
407 | * Start of write related routines. |
… | |
… | |
266 | */ |
416 | */ |
267 | void |
417 | void |
268 | client::send (void *buf_, int len) |
418 | client::send (void *buf_, int len) |
269 | { |
419 | { |
270 | char *buf = (char *)buf_; |
420 | char *buf = (char *)buf_; |
271 | char *pos = buf; |
|
|
272 | int amt = 0; |
|
|
273 | |
421 | |
274 | if (status == Ns_Dead || !buf) |
422 | if (destroyed () || !buf) |
275 | { |
|
|
276 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
277 | return; |
423 | return; |
278 | } |
|
|
279 | |
424 | |
280 | if ((len + outputbuffer.len) > SOCKETBUFSIZE) |
425 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
281 | { |
426 | { |
282 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
427 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
283 | status = Ns_Dead; |
428 | // shutdown the socket, this is safer than destroying it immediately |
|
|
429 | // as lots of code in the callchain might still access the map etc. |
|
|
430 | shutdown (fd, SHUT_RDWR); |
284 | return; |
431 | return; |
285 | } |
432 | } |
286 | |
433 | |
287 | int avail, end; |
434 | int avail, end; |
288 | |
435 | |
… | |
… | |
306 | } |
453 | } |
307 | |
454 | |
308 | outputbuffer.len += len; |
455 | outputbuffer.len += len; |
309 | } |
456 | } |
310 | |
457 | |
311 | void |
|
|
312 | client::socket_cb (iow &w, int got) |
|
|
313 | { |
|
|
314 | write_outputbuffer (); |
|
|
315 | |
|
|
316 | if (!outputbuffer.len) |
|
|
317 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
318 | } |
|
|
319 | |
|
|
320 | /** |
458 | /** |
321 | * Takes a string of data, and writes it out to the socket. A very handy |
459 | * Takes a string of data, and writes it out to the socket. A very handy |
322 | * shortcut function. |
460 | * shortcut function. |
323 | */ |
461 | */ |
324 | void |
462 | void |
325 | client::send_packet (packet &sl) |
463 | client::send_packet (packet &sl) |
326 | { |
464 | { |
327 | if (status == Ns_Dead) |
465 | if (destroyed ()) |
328 | return; |
466 | return; |
329 | |
467 | |
330 | if (sl.length () >= MAXSOCKBUF) |
468 | if (sl.length () >= MAXSOCKBUF) |
331 | { |
469 | { |
332 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
470 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
… | |
… | |
360 | client::send_packet (const char *buf) |
498 | client::send_packet (const char *buf) |
361 | { |
499 | { |
362 | send_packet (buf, strlen (buf)); |
500 | send_packet (buf, strlen (buf)); |
363 | } |
501 | } |
364 | |
502 | |
|
|
503 | void |
|
|
504 | client::send_packet_printf (const char *format, ...) |
|
|
505 | { |
|
|
506 | packet sl; |
|
|
507 | |
|
|
508 | va_list ap; |
|
|
509 | va_start (ap, format); |
|
|
510 | sl.vprintf (format, ap); |
|
|
511 | va_end (ap); |
|
|
512 | |
|
|
513 | send_packet (sl); |
|
|
514 | } |
|
|
515 | |
|
|
516 | // returns true when the message needs special (read: perl) treatment |
|
|
517 | static bool |
|
|
518 | msg_is_special (const char *msg) |
|
|
519 | { |
|
|
520 | return msg [strcspn (msg, "<[&\n")]; |
|
|
521 | } |
|
|
522 | |
|
|
523 | void |
|
|
524 | client::send_msg (int color, const char *type, const char *msg) |
|
|
525 | { |
|
|
526 | if (msg_is_special (msg)) |
|
|
527 | cfperl_send_msg (this, color, type, msg); |
|
|
528 | else if (can_msg) |
|
|
529 | send_packet_printf ("msg %d %s %s", color, type, msg); |
|
|
530 | else if (color < 0) |
|
|
531 | return; // client cannot handle this |
|
|
532 | else |
|
|
533 | send_packet_printf ("drawinfo %d %s", color, msg); |
|
|
534 | } |
|
|
535 | |
|
|
536 | void |
|
|
537 | client::send_drawinfo (const char *msg, int flags) |
|
|
538 | { |
|
|
539 | send_msg (flags, "log", msg); |
|
|
540 | } |
|
|
541 | |
365 | /****************************************************************************** |
542 | /*********************************************************************** |
366 | * |
543 | * |
367 | * statistics logging functions. |
544 | * packet functions/utilities |
368 | * |
545 | * |
369 | ******************************************************************************/ |
546 | **********************************************************************/ |
370 | |
547 | |
371 | #ifdef CS_LOGSTATS |
548 | packet::packet (const char *name) |
372 | |
|
|
373 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
374 | * stats |
|
|
375 | */ |
|
|
376 | CS_Stats cst_tot, cst_lst; |
|
|
377 | |
|
|
378 | /** |
|
|
379 | * Writes out the gathered stats. We clear cst_lst. |
|
|
380 | */ |
|
|
381 | void |
|
|
382 | write_cs_stats (void) |
|
|
383 | { |
549 | { |
384 | time_t now = time (NULL); |
550 | reset (); |
385 | |
551 | |
386 | /* If no connections recently, don't both to log anything */ |
552 | int len = strlen (name); |
387 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
553 | memcpy (cur, name, len); cur += len; |
388 | return; |
554 | *cur++ = ' '; |
389 | |
|
|
390 | /* CSSTAT is put in so scripts can easily find the line */ |
|
|
391 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
392 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
393 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
394 | cst_lst.ibytes = 0; |
|
|
395 | cst_lst.obytes = 0; |
|
|
396 | cst_lst.time_start = now; |
|
|
397 | } |
555 | } |
398 | #endif |
|
|
399 | |
556 | |
|
|
557 | packet &packet::operator <<(const ber32 v) |
|
|
558 | { |
|
|
559 | enum { maxlen = 32 / 7 + 1}; |
|
|
560 | uint8 buf[maxlen]; |
|
|
561 | uint8 *p = buf + maxlen; |
|
|
562 | uint32 val = v.val; |
|
|
563 | |
|
|
564 | *--p = val & 0x7F; |
|
|
565 | |
|
|
566 | while (val > 0x7F) |
|
|
567 | { |
|
|
568 | val >>= 7; |
|
|
569 | *--p = (val & 0x7F) | 0x80; |
|
|
570 | } |
|
|
571 | |
|
|
572 | return *this << data (p, buf + maxlen - p); |
|
|
573 | } |
|
|
574 | |
|
|
575 | packet &packet::operator <<(const data &v) |
|
|
576 | { |
|
|
577 | if (room () < v.len) |
|
|
578 | reset (); |
|
|
579 | else |
|
|
580 | { |
|
|
581 | if (v.len) |
|
|
582 | { |
|
|
583 | memcpy (cur, v.ptr, v.len); |
|
|
584 | cur += v.len; |
|
|
585 | } |
|
|
586 | } |
|
|
587 | |
|
|
588 | return *this; |
|
|
589 | } |
|
|
590 | |
|
|
591 | packet &packet::operator <<(const data8 &v) |
|
|
592 | { |
|
|
593 | unsigned int len = min (v.len, 0x00FF); |
|
|
594 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
595 | } |
|
|
596 | |
|
|
597 | packet &packet::operator <<(const data16 &v) |
|
|
598 | { |
|
|
599 | unsigned int len = min (v.len, 0xFFFF); |
|
|
600 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
601 | } |
|
|
602 | |
|
|
603 | packet &packet::operator <<(const char *v) |
|
|
604 | { |
|
|
605 | return *this << data (v, strlen (v ? v : 0)); |
|
|
606 | } |
|
|
607 | |
|
|
608 | void |
|
|
609 | packet::vprintf (const char *format, va_list ap) |
|
|
610 | { |
|
|
611 | int size = room (); |
|
|
612 | |
|
|
613 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
614 | |
|
|
615 | if (len >= size) |
|
|
616 | return reset (); |
|
|
617 | |
|
|
618 | cur += len; |
|
|
619 | } |
|
|
620 | |