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 | |
35 | using namespace std; |
23 | using namespace std; |
36 | |
24 | |
37 | #include <global.h> |
25 | #include <global.h> |
38 | #include <newclient.h> |
|
|
39 | #include <sproto.h> |
26 | #include <sproto.h> |
|
|
27 | #include <cstdarg> |
40 | |
28 | |
41 | #ifdef __linux__ |
29 | #if HAVE_TCP_INFO |
42 | # include <sys/types.h> |
30 | # include <sys/types.h> |
43 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
44 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
45 | # define TCP_HZ 1000 // sorry... |
|
|
46 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
47 | #endif |
34 | #endif |
48 | |
35 | |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
36 | // force a packet when idle for more than this many seconds, |
50 | // easily die in 20 seconds... |
37 | // forcing an ack regularly. |
51 | #define SOCKET_TIMEOUT1 10 |
38 | #define IDLE_PING 2. |
52 | #define SOCKET_TIMEOUT2 20 |
|
|
53 | |
39 | |
54 | void |
40 | void |
55 | Socket_Flush (NewSocket * ns) |
41 | client::flush () |
56 | { |
42 | { |
57 | #ifdef __linux__ |
43 | if (destroyed ()) |
58 | // check time of last ack, and, if too old, kill connection |
44 | return; |
59 | struct tcp_info tcpi; |
|
|
60 | socklen_t len = sizeof (tcpi); |
|
|
61 | |
45 | |
62 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
46 | /** |
63 | { |
47 | * Writes data to socket. |
64 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
48 | * |
|
|
49 | * When the socket is clear to write, and we have backlogged data, this |
|
|
50 | * is called to write it out. |
|
|
51 | */ |
65 | |
52 | |
66 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
53 | // write a nop to the socket at least every IDLE_NOP seconds. |
67 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
54 | if (!outputbuffer.len) |
68 | { |
55 | { |
69 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
70 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
|
|
71 | ns->status = Ns_Dead; |
|
|
72 | } |
57 | { |
|
|
58 | // this is a bit ugly, but map1/map1a seem to be the only |
|
|
59 | // nop'able commands and they are quite small. |
|
|
60 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
|
|
61 | send_packet (sl); |
|
|
62 | } |
|
|
63 | else |
|
|
64 | return; |
|
|
65 | } |
|
|
66 | |
|
|
67 | if (socket_ev.poll () & PE_W) |
|
|
68 | return; |
|
|
69 | |
|
|
70 | last_send = NOW; |
|
|
71 | write_outputbuffer (); |
|
|
72 | } |
|
|
73 | |
|
|
74 | void |
|
|
75 | client::write_outputbuffer () |
|
|
76 | { |
|
|
77 | while (outputbuffer.len) |
73 | } |
78 | { |
|
|
79 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
|
|
80 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
74 | |
81 | |
75 | int val; |
82 | if (res > 0) |
|
|
83 | { |
|
|
84 | outputbuffer.start += res; |
|
|
85 | /* wrap back to start of buffer */ |
|
|
86 | if (outputbuffer.start == SOCKETBUFSIZE) |
|
|
87 | outputbuffer.start = 0; |
76 | |
88 | |
77 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
89 | outputbuffer.len -= res; |
78 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
90 | } |
79 | #endif |
91 | else if (res == 0) |
80 | } |
92 | { |
|
|
93 | LOG (llevError, "socket write failed, connection closed.\n"); |
|
|
94 | destroy (); |
|
|
95 | return; |
|
|
96 | } |
|
|
97 | else if (errno == EINTR) |
|
|
98 | { |
|
|
99 | // just retry |
|
|
100 | } |
|
|
101 | else if (errno == EAGAIN) |
|
|
102 | { |
|
|
103 | // delay till ready |
|
|
104 | socket_ev.poll (socket_ev.poll () | PE_W); |
|
|
105 | socket_ev.start (); |
|
|
106 | return; |
|
|
107 | } |
|
|
108 | else |
|
|
109 | { |
|
|
110 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
|
|
111 | destroy (); |
|
|
112 | return; |
|
|
113 | } |
|
|
114 | } |
81 | |
115 | |
|
|
116 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
117 | } |
|
|
118 | |
|
|
119 | /****************************************************************************** |
|
|
120 | * |
|
|
121 | * Start of read routines. |
|
|
122 | * |
|
|
123 | ******************************************************************************/ |
|
|
124 | |
|
|
125 | int |
|
|
126 | client::next_packet () |
|
|
127 | { |
|
|
128 | if (inbuf_len >= 2) |
|
|
129 | { |
|
|
130 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
|
|
131 | |
|
|
132 | if (inbuf_len >= 2 + pkt_len) |
|
|
133 | return 2 + pkt_len; |
|
|
134 | |
|
|
135 | if (inbuf_len == sizeof (inbuf)) |
|
|
136 | { |
|
|
137 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
|
|
138 | destroy (); |
|
|
139 | return -1; |
|
|
140 | } |
|
|
141 | } |
|
|
142 | |
|
|
143 | return 0; |
|
|
144 | } |
|
|
145 | |
|
|
146 | void |
|
|
147 | client::skip_packet (int len) |
|
|
148 | { |
|
|
149 | inbuf_len -= len; |
|
|
150 | memmove (inbuf, inbuf + len, inbuf_len); |
|
|
151 | } |
|
|
152 | |
82 | /*********************************************************************** |
153 | /***************************************************************************** |
83 | * |
154 | * Start of command dispatch area. |
84 | * SockList functions/utilities |
155 | * The commands here are protocol commands. |
85 | * |
|
|
86 | **********************************************************************/ |
156 | ****************************************************************************/ |
87 | |
157 | |
88 | SockList &SockList::operator <<(const data8 &v) |
158 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
89 | { |
159 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
90 | *this << uint8 (v.len); |
160 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
91 | |
161 | |
92 | memcpy (buf + len, v.data, v.len); |
162 | /** |
93 | len += v.len; |
163 | * Dispatch table for the server. |
94 | |
|
|
95 | return *this; |
|
|
96 | } |
|
|
97 | |
|
|
98 | SockList &SockList::operator <<(const data16 &v) |
|
|
99 | { |
|
|
100 | *this << uint16 (v.len); |
|
|
101 | |
|
|
102 | memcpy (buf + len, v.data, v.len); |
|
|
103 | len += v.len; |
|
|
104 | |
|
|
105 | return *this; |
|
|
106 | } |
|
|
107 | |
|
|
108 | SockList &SockList::operator <<(const char *v) |
|
|
109 | { |
|
|
110 | if (v) |
|
|
111 | { |
|
|
112 | int l = strlen (v); |
|
|
113 | memcpy (buf + len, v, l); |
|
|
114 | len += l; |
|
|
115 | } |
|
|
116 | |
|
|
117 | return *this; |
|
|
118 | } |
|
|
119 | |
|
|
120 | /* Basically does the reverse of SockList_AddInt, but on |
|
|
121 | * strings instead. Same for the GetShort, but for 16 bits. |
|
|
122 | */ |
164 | */ |
123 | int |
165 | static struct packet_type packets[] = { |
124 | GetInt_String (unsigned char *data) |
166 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
125 | { |
167 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
126 | return ((data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3]); |
|
|
127 | } |
|
|
128 | |
168 | |
129 | short |
169 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
130 | GetShort_String (unsigned char *data) |
170 | {"ex", PC(ExCmd) PF_PLAYING }, |
131 | { |
171 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
132 | return ((data[0] << 8) + data[1]); |
172 | {"lookat", PC(LookAt) PF_PLAYING }, |
133 | } |
173 | {"lock", PC(LockItem) PF_PLAYING }, |
|
|
174 | {"mark", PC(MarkItem) PF_PLAYING }, |
|
|
175 | {"move", PC(MoveCmd) PF_PLAYING }, |
|
|
176 | {"ext", PC(ExtCmd) 0 }, // CF+ |
|
|
177 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
|
|
178 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
134 | |
179 | |
135 | /****************************************************************************** |
180 | {"reply", SC(ReplyCmd) 0 }, |
136 | * |
181 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
137 | * Start of read routines. |
182 | {"addme", SC(AddMeCmd) 0 }, |
138 | * |
183 | {"askface", SC(AskFaceCmd) 0 }, |
139 | ******************************************************************************/ |
184 | {"requestinfo", SC(RequestInfo) 0 }, |
|
|
185 | {"setfacemode", SC(SetFaceMode) 0 }, |
|
|
186 | {"setsound", SC(SetSound) 0 }, |
|
|
187 | {"setup", SC(SetUp) 0 }, |
|
|
188 | {"version", SC(VersionCmd) 0 }, |
|
|
189 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
|
|
190 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
|
|
191 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
|
|
192 | }; |
140 | |
193 | |
141 | /** |
194 | bool |
142 | * This reads from fd and puts the data in sl. We return true if we think |
195 | client::may_execute (const packet_type *pkt) const |
143 | * we have a full packet, 0 if we have a partial packet. The only processing |
|
|
144 | * we do is remove the intial size value. len (As passed) is the size of the |
|
|
145 | * buffer allocated in the socklist. We make the assumption the buffer is |
|
|
146 | * at least 2 bytes long. |
|
|
147 | */ |
|
|
148 | |
|
|
149 | int |
|
|
150 | SockList_ReadPacket (int fd, SockList * sl, int len) |
|
|
151 | { |
196 | { |
152 | int stat, toread; |
197 | return (!(pkt->flags & PF_PLAYER) || pl) |
|
|
198 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
|
|
199 | } |
153 | |
200 | |
154 | /* Sanity check - shouldn't happen */ |
201 | // HACK: some commands currently should be executed |
155 | if (sl->len < 0) |
202 | // even when the player is frozen. this hack detects |
156 | { |
203 | // those commands. it should be folded into may_execute, |
157 | abort (); |
204 | // but kept seperate to emphasise the hack aspect, i.e. |
|
|
205 | // do it better, then remove. |
|
|
206 | static bool |
|
|
207 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
|
|
208 | { |
|
|
209 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
|
|
210 | return false; |
|
|
211 | |
|
|
212 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
|
|
213 | return false; |
|
|
214 | |
|
|
215 | if (pkt->flags & PF_COMMAND6) |
158 | } |
216 | { |
159 | /* We already have a partial packet */ |
217 | data += 6; |
160 | if (sl->len < 2) |
218 | len -= 6; |
161 | { |
219 | } |
162 | do |
220 | |
|
|
221 | if (len > 4 && !strncmp (data, "say " , 4)) |
|
|
222 | return true; |
|
|
223 | if (len > 5 && !strncmp (data, "chat ", 5)) |
|
|
224 | return true; |
|
|
225 | |
|
|
226 | return false; |
|
|
227 | } |
|
|
228 | |
|
|
229 | void |
|
|
230 | client::execute (const packet_type *pkt, char *data, int datalen) |
|
|
231 | { |
|
|
232 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
|
|
233 | { |
|
|
234 | //TODO: only one format |
|
|
235 | if (pkt->flags & PF_PLAYER) |
|
|
236 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
|
|
237 | else |
|
|
238 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
|
|
239 | } |
|
|
240 | else |
|
|
241 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
|
|
242 | } |
|
|
243 | |
|
|
244 | bool |
|
|
245 | client::handle_packet () |
|
|
246 | { |
|
|
247 | int pkt_len = next_packet (); |
|
|
248 | |
|
|
249 | if (!pkt_len) |
|
|
250 | return false; |
|
|
251 | else if (pkt_len < 0) |
|
|
252 | { |
|
|
253 | LOG (llevError, "read error on player %s\n", |
|
|
254 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
|
|
255 | destroy (); |
|
|
256 | return false; |
|
|
257 | } |
|
|
258 | |
|
|
259 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
|
|
260 | |
|
|
261 | /* First, break out beginning word. There are at least |
|
|
262 | * a few commands that do not have any paremeters. If |
|
|
263 | * we get such a command, don't worry about trying |
|
|
264 | * to break it up. |
|
|
265 | */ |
|
|
266 | int datalen; |
|
|
267 | char *data = strchr ((char *)inbuf + 2, ' '); |
|
|
268 | |
|
|
269 | if (data) |
|
|
270 | { |
|
|
271 | *data++ = 0; |
|
|
272 | datalen = pkt_len - (data - (char *)inbuf); |
|
|
273 | } |
|
|
274 | else |
|
|
275 | { |
|
|
276 | data = (char *)inbuf + 2; // better read garbage than segfault |
|
|
277 | datalen = 0; |
|
|
278 | } |
|
|
279 | |
|
|
280 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
|
|
281 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
163 | { |
282 | { |
164 | stat = read (fd, sl->buf + sl->len, 2 - sl->len); |
283 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
|
|
284 | queue_command (pkt, data, datalen); |
|
|
285 | else |
|
|
286 | execute (pkt, data, datalen); |
|
|
287 | |
|
|
288 | goto next_packet; |
|
|
289 | } |
|
|
290 | |
|
|
291 | // If we get here, we didn't find a valid command. |
|
|
292 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
|
|
293 | next_packet: |
|
|
294 | skip_packet (pkt_len); |
|
|
295 | |
|
|
296 | // input buffer has space again |
|
|
297 | socket_ev.poll (socket_ev.poll () | PE_R); |
|
|
298 | |
|
|
299 | return true; |
|
|
300 | } |
|
|
301 | |
|
|
302 | // callback called when socket is either readable or writable |
|
|
303 | void |
|
|
304 | client::socket_cb (iow &w, int got) |
|
|
305 | { |
|
|
306 | //TODO remove when we have better socket cleanup logic |
|
|
307 | if (destroyed ()) |
|
|
308 | { |
|
|
309 | socket_ev.poll (0); |
|
|
310 | return; |
|
|
311 | } |
|
|
312 | |
|
|
313 | if (got & PE_W) |
|
|
314 | { |
|
|
315 | write_outputbuffer (); |
|
|
316 | |
|
|
317 | if (!outputbuffer.len) |
|
|
318 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
319 | } |
|
|
320 | |
|
|
321 | if (got & PE_R) |
|
|
322 | { |
|
|
323 | //TODO: rate-limit tcp connection in better ways, important |
|
|
324 | |
|
|
325 | int amount = sizeof (inbuf) - inbuf_len; |
|
|
326 | |
|
|
327 | if (!amount) |
165 | } |
328 | { |
166 | while ((stat == -1) && (errno == EINTR)); |
329 | // input buffer full |
167 | |
330 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
168 | if (stat < 0) |
331 | return; |
169 | { |
332 | } |
170 | /* In non blocking mode, EAGAIN is set when there is no |
333 | |
171 | * data available. |
334 | amount = read (fd, inbuf + inbuf_len, amount); |
172 | */ |
335 | |
|
|
336 | if (!amount) |
|
|
337 | { |
|
|
338 | destroy (); |
|
|
339 | return; |
|
|
340 | } |
|
|
341 | else if (amount < 0) |
|
|
342 | { |
173 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
343 | if (errno != EAGAIN && errno != EINTR) |
174 | { |
344 | { |
175 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
345 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
346 | destroy (); |
|
|
347 | return; |
176 | } |
348 | } |
177 | return 0; /*Error */ |
|
|
178 | } |
|
|
179 | if (stat == 0) |
|
|
180 | return -1; |
|
|
181 | sl->len += stat; |
|
|
182 | #ifdef CS_LOGSTATS |
|
|
183 | cst_tot.ibytes += stat; |
|
|
184 | cst_lst.ibytes += stat; |
|
|
185 | #endif |
|
|
186 | if (stat < 2) |
|
|
187 | return 0; /* Still don't have a full packet */ |
|
|
188 | } |
|
|
189 | /* Figure out how much more data we need to read. Add 2 from the |
|
|
190 | * end of this - size header information is not included. |
|
|
191 | */ |
|
|
192 | toread = 2 + (sl->buf[0] << 8) + sl->buf[1] - sl->len; |
|
|
193 | if ((toread + sl->len) >= len) |
|
|
194 | { |
|
|
195 | LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len); |
|
|
196 | /* Quick hack in case for 'oldsocketmode' input. If we are |
|
|
197 | * closing the socket anyways, then reading this extra 100 bytes |
|
|
198 | * shouldn't hurt. |
|
|
199 | */ |
|
|
200 | read (fd, sl->buf + 2, 100); |
|
|
201 | |
349 | |
202 | /* return error so the socket is closed */ |
350 | // should not be here, normally |
203 | return -1; |
|
|
204 | } |
|
|
205 | do |
|
|
206 | { |
|
|
207 | do |
|
|
208 | { |
351 | } |
209 | stat = read (fd, sl->buf + sl->len, toread); |
352 | else |
210 | } |
353 | { |
211 | while ((stat < 0) && (errno == EINTR)); |
354 | inbuf_len += amount; |
212 | if (stat < 0) |
|
|
213 | { |
|
|
214 | |
355 | |
215 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
356 | if (handle_packet ()) |
216 | { |
357 | { |
217 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
358 | while (handle_packet ()) |
|
|
359 | ; |
|
|
360 | |
|
|
361 | flush (); |
218 | } |
362 | } |
219 | return 0; /*Error */ |
|
|
220 | } |
|
|
221 | if (stat == 0) |
|
|
222 | return -1; |
|
|
223 | sl->len += stat; |
|
|
224 | #ifdef CS_LOGSTATS |
|
|
225 | cst_tot.ibytes += stat; |
|
|
226 | cst_lst.ibytes += stat; |
|
|
227 | #endif |
|
|
228 | toread -= stat; |
|
|
229 | if (toread == 0) |
|
|
230 | return 1; |
|
|
231 | if (toread < 0) |
|
|
232 | { |
363 | } |
233 | LOG (llevError, "SockList_ReadPacket: Read more bytes than desired.\n"); |
|
|
234 | return 1; |
|
|
235 | } |
|
|
236 | } |
364 | } |
237 | while (toread > 0); |
|
|
238 | return 0; |
|
|
239 | } |
365 | } |
240 | |
366 | |
241 | /******************************************************************************* |
367 | /******************************************************************************* |
242 | * |
368 | * |
243 | * Start of write related routines. |
369 | * Start of write related routines. |
… | |
… | |
248 | * Adds data to a socket buffer for whatever reason. |
374 | * Adds data to a socket buffer for whatever reason. |
249 | * |
375 | * |
250 | * ns is the socket we are adding the data to, buf is the start of the |
376 | * ns is the socket we are adding the data to, buf is the start of the |
251 | * data, and len is the number of bytes to add. |
377 | * data, and len is the number of bytes to add. |
252 | */ |
378 | */ |
253 | |
379 | void |
254 | static void |
380 | client::send (void *buf_, int len) |
255 | add_to_buffer (NewSocket * ns, char *buf, int len) |
|
|
256 | { |
381 | { |
|
|
382 | char *buf = (char *)buf_; |
|
|
383 | |
|
|
384 | if (destroyed () || !buf) |
|
|
385 | return; |
|
|
386 | |
|
|
387 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
|
|
388 | { |
|
|
389 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
|
|
390 | // shutdown the socket, this is safer than destroying it immediately |
|
|
391 | // as lots of code in the callchain might still access the map etc. |
|
|
392 | shutdown (fd, SHUT_RDWR); |
|
|
393 | return; |
|
|
394 | } |
|
|
395 | |
257 | int avail, end; |
396 | int avail, end; |
258 | |
|
|
259 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
|
|
260 | { |
|
|
261 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
|
|
262 | ns->status = Ns_Dead; |
|
|
263 | return; |
|
|
264 | } |
|
|
265 | |
397 | |
266 | /* data + end is where we start putting the new data. The last byte |
398 | /* data + end is where we start putting the new data. The last byte |
267 | * currently in use is actually data + end -1 |
399 | * currently in use is actually data + end -1 |
268 | */ |
400 | */ |
269 | |
|
|
270 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
401 | end = outputbuffer.start + outputbuffer.len; |
271 | /* The buffer is already in a wrapped state, so adjust end */ |
402 | /* The buffer is already in a wrapped state, so adjust end */ |
272 | if (end >= SOCKETBUFSIZE) |
403 | if (end >= SOCKETBUFSIZE) |
273 | end -= SOCKETBUFSIZE; |
404 | end -= SOCKETBUFSIZE; |
274 | |
405 | |
275 | avail = SOCKETBUFSIZE - end; |
406 | avail = SOCKETBUFSIZE - end; |
276 | |
407 | |
277 | /* We can all fit it behind the current data without wrapping */ |
408 | /* We can all fit it behind the current data without wrapping */ |
278 | if (avail >= len) |
409 | if (avail >= len) |
279 | memcpy (ns->outputbuffer.data + end, buf, len); |
410 | memcpy (outputbuffer.data + end, buf, len); |
280 | else |
411 | else |
281 | { |
412 | { |
282 | memcpy (ns->outputbuffer.data + end, buf, avail); |
413 | memcpy (outputbuffer.data + end, buf, avail); |
283 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
414 | memcpy (outputbuffer.data, buf + avail, len - avail); |
284 | } |
415 | } |
285 | |
416 | |
286 | ns->outputbuffer.len += len; |
417 | outputbuffer.len += len; |
287 | #if 0 |
|
|
288 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
|
|
289 | #endif |
|
|
290 | } |
418 | } |
291 | |
|
|
292 | /** |
|
|
293 | * Writes data to socket. |
|
|
294 | * |
|
|
295 | * When the socket is clear to write, and we have backlogged data, this |
|
|
296 | * is called to write it out. |
|
|
297 | */ |
|
|
298 | void |
|
|
299 | write_socket_buffer (NewSocket * ns) |
|
|
300 | { |
|
|
301 | int amt, max; |
|
|
302 | |
|
|
303 | if (ns->outputbuffer.len == 0) |
|
|
304 | { |
|
|
305 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
|
|
306 | return; |
|
|
307 | } |
|
|
308 | |
|
|
309 | do |
|
|
310 | { |
|
|
311 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
|
|
312 | if (ns->outputbuffer.len < max) |
|
|
313 | max = ns->outputbuffer.len; |
|
|
314 | |
|
|
315 | do |
|
|
316 | { |
|
|
317 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
318 | } |
|
|
319 | while ((amt < 0) && (errno == EINTR)); |
|
|
320 | |
|
|
321 | if (amt < 0) |
|
|
322 | { /* We got an error */ |
|
|
323 | |
|
|
324 | if (errno != EWOULDBLOCK) |
|
|
325 | { |
|
|
326 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
|
|
327 | ns->status = Ns_Dead; |
|
|
328 | return; |
|
|
329 | } |
|
|
330 | else |
|
|
331 | { /* EWOULDBLOCK */ |
|
|
332 | /* can't write it, so store it away. */ |
|
|
333 | ns->can_write = 0; |
|
|
334 | return; |
|
|
335 | } |
|
|
336 | } |
|
|
337 | ns->outputbuffer.start += amt; |
|
|
338 | /* wrap back to start of buffer */ |
|
|
339 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
340 | ns->outputbuffer.start = 0; |
|
|
341 | ns->outputbuffer.len -= amt; |
|
|
342 | #ifdef CS_LOGSTATS |
|
|
343 | cst_tot.obytes += amt; |
|
|
344 | cst_lst.obytes += amt; |
|
|
345 | #endif |
|
|
346 | } |
|
|
347 | while (ns->outputbuffer.len > 0); |
|
|
348 | } |
|
|
349 | |
|
|
350 | /** |
|
|
351 | * This writes data to the socket. - It is very low level - |
|
|
352 | * all we try and do is write out the data to the socket |
|
|
353 | * provided (ns). buf is the data to write, len is the number |
|
|
354 | * of bytes to write. IT doesn't return anything - rather, it |
|
|
355 | * updates the ns structure if we get an error. |
|
|
356 | */ |
|
|
357 | void |
|
|
358 | Write_To_Socket (NewSocket * ns, char *buf, int len) |
|
|
359 | { |
|
|
360 | int amt = 0; |
|
|
361 | char *pos = buf; |
|
|
362 | |
|
|
363 | if (ns->status == Ns_Dead || !buf) |
|
|
364 | { |
|
|
365 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
366 | return; |
|
|
367 | } |
|
|
368 | |
|
|
369 | #ifndef __GNU__ /* This caused problems on Hurd */ |
|
|
370 | if (!ns->can_write) |
|
|
371 | { |
|
|
372 | add_to_buffer (ns, buf, len); |
|
|
373 | return; |
|
|
374 | } |
|
|
375 | #endif |
|
|
376 | /* If we manage to write more than we wanted, take it as a bonus */ |
|
|
377 | while (len > 0) |
|
|
378 | { |
|
|
379 | |
|
|
380 | do |
|
|
381 | { |
|
|
382 | amt = write (ns->fd, pos, len); |
|
|
383 | } |
|
|
384 | while ((amt < 0) && (errno == EINTR)); |
|
|
385 | |
|
|
386 | if (amt < 0) |
|
|
387 | { /* We got an error */ |
|
|
388 | if (errno != EWOULDBLOCK) |
|
|
389 | { |
|
|
390 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
|
|
391 | errno, strerror (errno)); |
|
|
392 | ns->status = Ns_Dead; |
|
|
393 | return; |
|
|
394 | } |
|
|
395 | else |
|
|
396 | { /* EWOULDBLOCK */ |
|
|
397 | /* can't write it, so store it away. */ |
|
|
398 | add_to_buffer (ns, pos, len); |
|
|
399 | ns->can_write = 0; |
|
|
400 | return; |
|
|
401 | } |
|
|
402 | } |
|
|
403 | /* amt gets set to 0 above in blocking code, so we do this as |
|
|
404 | * an else if to make sure we don't reprocess it. |
|
|
405 | */ |
|
|
406 | else if (amt == 0) |
|
|
407 | { |
|
|
408 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
|
|
409 | } |
|
|
410 | len -= amt; |
|
|
411 | pos += amt; |
|
|
412 | #ifdef CS_LOGSTATS |
|
|
413 | cst_tot.obytes += amt; |
|
|
414 | cst_lst.obytes += amt; |
|
|
415 | #endif |
|
|
416 | } |
|
|
417 | } |
|
|
418 | |
|
|
419 | |
419 | |
420 | /** |
420 | /** |
421 | * Takes a string of data, and writes it out to the socket. A very handy |
421 | * Takes a string of data, and writes it out to the socket. A very handy |
422 | * shortcut function. |
422 | * shortcut function. |
423 | */ |
423 | */ |
424 | void |
424 | void |
425 | cs_write_string (NewSocket * ns, const char *buf, int len) |
425 | client::send_packet (packet &sl) |
426 | { |
426 | { |
427 | SockList sl; |
427 | if (destroyed ()) |
428 | |
|
|
429 | sl.len = len; |
|
|
430 | sl.buf = (unsigned char *) buf; |
|
|
431 | Send_With_Handling (ns, &sl); |
|
|
432 | } |
|
|
433 | |
|
|
434 | |
|
|
435 | /** |
|
|
436 | * Calls Write_To_Socket to send data to the client. |
|
|
437 | * |
|
|
438 | * The only difference in this function is that we take a SockList |
|
|
439 | *, and we prepend the length information. |
|
|
440 | */ |
|
|
441 | void |
|
|
442 | Send_With_Handling (NewSocket * ns, SockList * msg) |
|
|
443 | { |
|
|
444 | unsigned char sbuf[4]; |
|
|
445 | |
|
|
446 | if (ns->status == Ns_Dead || !msg) |
|
|
447 | return; |
428 | return; |
448 | |
429 | |
449 | if (msg->len >= MAXSOCKBUF) |
430 | if (sl.length () > MAXSOCKBUF) |
450 | { |
431 | { |
451 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); |
432 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
452 | /* Almost certainly we've overflowed a buffer, so quite now to make |
433 | /* Almost certainly we've overflowed a buffer, so quit now to make |
453 | * it easier to debug. |
434 | * it easier to debug. |
454 | */ |
435 | */ |
455 | abort (); |
436 | abort (); |
456 | } |
437 | } |
457 | sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; |
|
|
458 | sbuf[1] = ((uint32) (msg->len)) & 0xFF; |
|
|
459 | if (ns->status != Ns_Old) |
|
|
460 | Write_To_Socket (ns, (char *) sbuf, 2); |
|
|
461 | Write_To_Socket (ns, (char *) msg->buf, msg->len); |
|
|
462 | } |
|
|
463 | |
438 | |
464 | /** |
439 | if (!sl.length ()) |
465 | * Takes a string of data, and writes it out to the socket. A very handy |
|
|
466 | * shortcut function. |
|
|
467 | */ |
|
|
468 | void |
|
|
469 | Write_String_To_Socket (NewSocket * ns, char *buf, int len) |
|
|
470 | { |
|
|
471 | SockList sl; |
|
|
472 | |
|
|
473 | sl.len = len; |
|
|
474 | sl.buf = (unsigned char *) buf; |
|
|
475 | Send_With_Handling (ns, &sl); |
|
|
476 | } |
|
|
477 | |
|
|
478 | |
|
|
479 | /****************************************************************************** |
|
|
480 | * |
|
|
481 | * statistics logging functions. |
|
|
482 | * |
|
|
483 | ******************************************************************************/ |
|
|
484 | |
|
|
485 | #ifdef CS_LOGSTATS |
|
|
486 | |
|
|
487 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
488 | * stats |
|
|
489 | */ |
|
|
490 | CS_Stats cst_tot, cst_lst; |
|
|
491 | |
|
|
492 | /** |
|
|
493 | * Writes out the gathered stats. We clear cst_lst. |
|
|
494 | */ |
|
|
495 | void |
|
|
496 | write_cs_stats (void) |
|
|
497 | { |
|
|
498 | time_t now = time (NULL); |
|
|
499 | |
|
|
500 | /* If no connections recently, don't both to log anything */ |
|
|
501 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
502 | return; |
440 | return; |
503 | |
441 | |
504 | /* CSSTAT is put in so scripts can easily find the line */ |
442 | assert (sl.hdrlen == 2); |
505 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
506 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
507 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
508 | cst_lst.ibytes = 0; |
|
|
509 | cst_lst.obytes = 0; |
|
|
510 | cst_lst.max_conn = socket_info.nconns; |
|
|
511 | cst_lst.time_start = now; |
|
|
512 | } |
|
|
513 | #endif |
|
|
514 | |
443 | |
|
|
444 | sl.buf_ [0] = sl.length () >> 8; |
|
|
445 | sl.buf_ [1] = sl.length () ; |
|
|
446 | |
|
|
447 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
448 | } |
|
|
449 | |
|
|
450 | void |
|
|
451 | client::send_packet (const char *buf, int len) |
|
|
452 | { |
|
|
453 | packet sl; |
|
|
454 | |
|
|
455 | sl << data (buf, len); |
|
|
456 | send_packet (sl); |
|
|
457 | } |
|
|
458 | |
|
|
459 | void |
|
|
460 | client::send_packet (const char *buf) |
|
|
461 | { |
|
|
462 | send_packet (buf, strlen (buf)); |
|
|
463 | } |
|
|
464 | |
|
|
465 | void |
|
|
466 | client::send_packet_printf (const char *format, ...) |
|
|
467 | { |
|
|
468 | packet sl; |
|
|
469 | |
|
|
470 | va_list ap; |
|
|
471 | va_start (ap, format); |
|
|
472 | sl.vprintf (format, ap); |
|
|
473 | va_end (ap); |
|
|
474 | |
|
|
475 | send_packet (sl); |
|
|
476 | } |
|
|
477 | |
|
|
478 | // returns true when the message needs special (read: perl) treatment |
|
|
479 | static bool |
|
|
480 | msg_is_special (const char *msg) |
|
|
481 | { |
|
|
482 | return msg [strcspn (msg, "<[&\n")]; |
|
|
483 | } |
|
|
484 | |
|
|
485 | void |
|
|
486 | client::send_msg (int color, const char *type, const char *msg) |
|
|
487 | { |
|
|
488 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
489 | { |
|
|
490 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
491 | return; |
|
|
492 | } |
|
|
493 | |
|
|
494 | int len = strlen (msg); |
|
|
495 | |
|
|
496 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
|
|
497 | cfperl_send_msg (this, color, type, msg); |
|
|
498 | else if (can_msg) |
|
|
499 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
500 | else if (color < 0) |
|
|
501 | return; // client cannot handle this |
|
|
502 | else |
|
|
503 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
|
504 | } |
|
|
505 | |
|
|
506 | void |
|
|
507 | client::send_drawinfo (const char *msg, int flags) |
|
|
508 | { |
|
|
509 | send_msg (flags, "log", msg); |
|
|
510 | } |
|
|
511 | |
|
|
512 | /*********************************************************************** |
|
|
513 | * |
|
|
514 | * packet functions/utilities |
|
|
515 | * |
|
|
516 | **********************************************************************/ |
|
|
517 | |
|
|
518 | packet::packet (const char *name) |
|
|
519 | { |
|
|
520 | reset (); |
|
|
521 | |
|
|
522 | int len = strlen (name); |
|
|
523 | memcpy (cur, name, len); cur += len; |
|
|
524 | *cur++ = ' '; |
|
|
525 | } |
|
|
526 | |
|
|
527 | packet &packet::operator <<(const ber32 v) |
|
|
528 | { |
|
|
529 | enum { maxlen = 32 / 7 + 1}; |
|
|
530 | uint8 buf[maxlen]; |
|
|
531 | uint8 *p = buf + maxlen; |
|
|
532 | uint32 val = v.val; |
|
|
533 | |
|
|
534 | *--p = val & 0x7F; |
|
|
535 | |
|
|
536 | while (val > 0x7F) |
|
|
537 | { |
|
|
538 | val >>= 7; |
|
|
539 | *--p = (val & 0x7F) | 0x80; |
|
|
540 | } |
|
|
541 | |
|
|
542 | return *this << data (p, buf + maxlen - p); |
|
|
543 | } |
|
|
544 | |
|
|
545 | packet &packet::operator <<(const data &v) |
|
|
546 | { |
|
|
547 | if (room () < v.len) |
|
|
548 | reset (); |
|
|
549 | else |
|
|
550 | { |
|
|
551 | if (v.len) |
|
|
552 | { |
|
|
553 | memcpy (cur, v.ptr, v.len); |
|
|
554 | cur += v.len; |
|
|
555 | } |
|
|
556 | } |
|
|
557 | |
|
|
558 | return *this; |
|
|
559 | } |
|
|
560 | |
|
|
561 | packet &packet::operator <<(const data8 &v) |
|
|
562 | { |
|
|
563 | unsigned int len = min (v.len, 0x00FF); |
|
|
564 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
565 | } |
|
|
566 | |
|
|
567 | packet &packet::operator <<(const data16 &v) |
|
|
568 | { |
|
|
569 | unsigned int len = min (v.len, 0xFFFF); |
|
|
570 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
571 | } |
|
|
572 | |
|
|
573 | packet &packet::operator <<(const char *v) |
|
|
574 | { |
|
|
575 | return *this << data (v, strlen (v ? v : 0)); |
|
|
576 | } |
|
|
577 | |
|
|
578 | void |
|
|
579 | packet::vprintf (const char *format, va_list ap) |
|
|
580 | { |
|
|
581 | int size = room (); |
|
|
582 | |
|
|
583 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
584 | |
|
|
585 | if (len >= size) |
|
|
586 | return reset (); |
|
|
587 | |
|
|
588 | cur += len; |
|
|
589 | } |
|
|
590 | |