1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game for X-windows |
3 | |
3 | * |
|
|
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (C) 1992 Frank Tore Johansen |
5 | |
6 | * |
6 | This program is free software; you can redistribute it and/or modify |
7 | * This program 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 2 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, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | |
20 | * |
20 | The author can be reached via e-mail to mark@pyramid.com |
21 | * The author can be reached via e-mail to mark@pyramid.com |
21 | */ |
22 | */ |
22 | |
23 | |
23 | /** |
24 | /** |
24 | * \file |
25 | * \file |
25 | * Low-level socket-related functions. |
26 | * Low-level socket-related functions. |
26 | * |
27 | * |
27 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
… | |
… | |
33 | */ |
34 | */ |
34 | |
35 | |
35 | using namespace std; |
36 | using 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 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
51 | // easily die in 20 seconds... |
50 | // easily die in 20 seconds... |
52 | #define SOCKET_TIMEOUT1 10 |
51 | #define SOCKET_TIMEOUT1 10 * 1000 |
53 | #define SOCKET_TIMEOUT2 20 |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
54 | |
53 | |
55 | void |
54 | void |
56 | Socket_Flush (client_socket * ns) |
55 | client::flush () |
57 | { |
56 | { |
|
|
57 | if (destroyed ()) |
|
|
58 | return; |
|
|
59 | |
58 | #ifdef __linux__ |
60 | #ifdef __linux__ |
59 | // check time of last ack, and, if too old, kill connection |
61 | // check time of last ack, and, if too old, kill connection |
60 | struct tcp_info tcpi; |
62 | struct tcp_info tcpi; |
61 | socklen_t len = sizeof (tcpi); |
63 | socklen_t len = sizeof (tcpi); |
62 | |
64 | |
63 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
64 | { |
66 | { |
65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
66 | |
68 | |
|
|
69 | rtt = tcpi.tcpi_rtt; |
|
|
70 | rttvar = tcpi.tcpi_rttvar; |
|
|
71 | |
67 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
68 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
69 | { |
74 | { |
70 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
75 | 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); |
76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
72 | ns->status = Ns_Dead; |
77 | destroy (); |
73 | } |
78 | } |
74 | } |
79 | } |
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 |
80 | #endif |
|
|
81 | |
|
|
82 | /** |
|
|
83 | * Writes data to socket. |
|
|
84 | * |
|
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85 | * When the socket is clear to write, and we have backlogged data, this |
|
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86 | * is called to write it out. |
|
|
87 | */ |
|
|
88 | |
|
|
89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
|
|
90 | return; |
|
|
91 | |
|
|
92 | write_outputbuffer (); |
|
|
93 | } |
|
|
94 | |
|
|
95 | void |
|
|
96 | client::write_outputbuffer () |
|
|
97 | { |
|
|
98 | while (outputbuffer.len) |
|
|
99 | { |
|
|
100 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
|
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101 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
|
|
102 | |
|
|
103 | if (res > 0) |
|
|
104 | { |
|
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105 | outputbuffer.start += res; |
|
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106 | /* wrap back to start of buffer */ |
|
|
107 | if (outputbuffer.start == SOCKETBUFSIZE) |
|
|
108 | outputbuffer.start = 0; |
|
|
109 | |
|
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110 | outputbuffer.len -= res; |
|
|
111 | #ifdef CS_LOGSTATS |
|
|
112 | cst_tot.obytes += res; |
|
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113 | cst_lst.obytes += res; |
|
|
114 | #endif |
|
|
115 | } |
|
|
116 | else if (res == 0) |
|
|
117 | { |
|
|
118 | LOG (llevError, "socket write failed, connection closed.\n"); |
|
|
119 | destroy (); |
|
|
120 | return; |
|
|
121 | } |
|
|
122 | else if (errno == EINTR) |
|
|
123 | { |
|
|
124 | // just retry |
|
|
125 | } |
|
|
126 | else if (errno == EAGAIN) |
|
|
127 | { |
|
|
128 | // delay till ready |
|
|
129 | socket_ev.poll (socket_ev.poll () | PE_W); |
|
|
130 | socket_ev.start (); |
|
|
131 | return; |
|
|
132 | } |
|
|
133 | else |
|
|
134 | { |
|
|
135 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
|
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136 | destroy (); |
|
|
137 | return; |
|
|
138 | } |
|
|
139 | } |
|
|
140 | |
|
|
141 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
142 | } |
|
|
143 | |
|
|
144 | /****************************************************************************** |
|
|
145 | * |
|
|
146 | * Start of read routines. |
|
|
147 | * |
|
|
148 | ******************************************************************************/ |
|
|
149 | |
|
|
150 | int |
|
|
151 | client::next_packet () |
|
|
152 | { |
|
|
153 | if (inbuf_len >= 2) |
|
|
154 | { |
|
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155 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
|
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156 | |
|
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157 | if (inbuf_len >= 2 + pkt_len) |
|
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158 | return 2 + pkt_len; |
|
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159 | |
|
|
160 | if (inbuf_len == sizeof (inbuf)) |
|
|
161 | { |
|
|
162 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
|
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163 | destroy (); |
|
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164 | return -1; |
|
|
165 | } |
|
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166 | } |
|
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167 | |
|
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168 | return 0; |
|
|
169 | } |
|
|
170 | |
|
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171 | void |
|
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172 | client::skip_packet (int len) |
|
|
173 | { |
|
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174 | inbuf_len -= len; |
|
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175 | memmove (inbuf, inbuf + len, inbuf_len); |
|
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176 | } |
|
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177 | |
|
|
178 | /***************************************************************************** |
|
|
179 | * Start of command dispatch area. |
|
|
180 | * The commands here are protocol commands. |
|
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181 | ****************************************************************************/ |
|
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182 | |
|
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183 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
|
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184 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
|
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185 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
|
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186 | |
|
|
187 | /** |
|
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188 | * Dispatch table for the server. |
|
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189 | */ |
|
|
190 | static struct packet_type packets[] = { |
|
|
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
|
|
192 | {"command", PC(PlayerCmd) PF_PLAYING }, |
|
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193 | |
|
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194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
|
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195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
|
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196 | {"lookat", PC(LookAt) PF_PLAYING }, |
|
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197 | {"lock", PC(LockItem) PF_PLAYING }, |
|
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198 | {"mark", PC(MarkItem) PF_PLAYING }, |
|
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199 | {"move", PC(MoveCmd) PF_PLAYING }, |
|
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200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
|
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201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
|
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202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
|
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203 | |
|
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204 | {"reply", SC(ReplyCmd) 0 }, |
|
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205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
|
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206 | {"addme", SC(AddMeCmd) 0 }, |
|
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207 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
|
|
208 | {"requestinfo", SC(RequestInfo) 0 }, |
|
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209 | {"setfacemode", SC(SetFaceMode) 0 }, |
|
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210 | {"setsound", SC(SetSound) 0 }, |
|
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211 | {"setup", SC(SetUp) 0 }, |
|
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212 | {"version", SC(VersionCmd) 0 }, |
|
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213 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
|
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214 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
|
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215 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
|
|
216 | }; |
|
|
217 | |
|
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218 | bool |
|
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219 | client::may_execute (const packet_type *pkt) const |
|
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220 | { |
|
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221 | return (!(pkt->flags & PF_PLAYER) || pl) |
|
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222 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
|
|
223 | } |
|
|
224 | |
|
|
225 | void |
|
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226 | client::execute (const packet_type *pkt, char *data, int datalen) |
|
|
227 | { |
|
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228 | if (may_execute (pkt)) |
|
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229 | { |
|
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230 | //TODO: only one format |
|
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231 | if (pkt->flags & PF_PLAYER) |
|
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232 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
|
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233 | else |
|
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234 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
|
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235 | } |
|
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236 | else |
|
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237 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
|
|
238 | } |
|
|
239 | |
|
|
240 | bool |
|
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241 | client::handle_packet () |
|
|
242 | { |
|
|
243 | int pkt_len = next_packet (); |
|
|
244 | |
|
|
245 | if (!pkt_len) |
|
|
246 | return false; |
|
|
247 | else if (pkt_len < 0) |
|
|
248 | { |
|
|
249 | LOG (llevError, "read error on player %s\n", |
|
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250 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
|
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251 | destroy (); |
|
|
252 | return false; |
|
|
253 | } |
|
|
254 | |
|
|
255 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
|
|
256 | |
|
|
257 | /* First, break out beginning word. There are at least |
|
|
258 | * a few commands that do not have any paremeters. If |
|
|
259 | * we get such a command, don't worry about trying |
|
|
260 | * to break it up. |
|
|
261 | */ |
|
|
262 | int datalen; |
|
|
263 | char *data = strchr ((char *)inbuf + 2, ' '); |
|
|
264 | |
|
|
265 | if (data) |
|
|
266 | { |
|
|
267 | *data++ = 0; |
|
|
268 | datalen = pkt_len - (data - (char *)inbuf); |
|
|
269 | } |
|
|
270 | else |
|
|
271 | { |
|
|
272 | data = (char *)inbuf + 2; // better read garbage than segfault |
|
|
273 | datalen = 0; |
|
|
274 | } |
|
|
275 | |
|
|
276 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
|
|
277 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
|
|
278 | { |
|
|
279 | if (pkt->flags & PF_PLAYER) |
|
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280 | queue_command (pkt, data, datalen); |
|
|
281 | else |
|
|
282 | execute (pkt, data, datalen); |
|
|
283 | |
|
|
284 | goto next_packet; |
|
|
285 | } |
|
|
286 | |
|
|
287 | // If we get here, we didn't find a valid command. |
|
|
288 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
|
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289 | next_packet: |
|
|
290 | skip_packet (pkt_len); |
|
|
291 | |
|
|
292 | // input buffer has space again |
|
|
293 | socket_ev.poll (socket_ev.poll () | PE_R); |
|
|
294 | |
|
|
295 | return true; |
|
|
296 | } |
|
|
297 | |
|
|
298 | // callback called when socket is either readable or writable |
|
|
299 | void |
|
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300 | client::socket_cb (iow &w, int got) |
|
|
301 | { |
|
|
302 | //TODO remove when we have better socket cleanup logic |
|
|
303 | if (destroyed ()) |
|
|
304 | { |
|
|
305 | socket_ev.poll (0); |
|
|
306 | return; |
|
|
307 | } |
|
|
308 | |
|
|
309 | if (got & PE_W) |
|
|
310 | { |
|
|
311 | write_outputbuffer (); |
|
|
312 | |
|
|
313 | if (!outputbuffer.len) |
|
|
314 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
315 | } |
|
|
316 | |
|
|
317 | if (got & PE_R) |
|
|
318 | { |
|
|
319 | //TODO: rate-limit tcp connection in better ways, important |
|
|
320 | |
|
|
321 | int amount = sizeof (inbuf) - inbuf_len; |
|
|
322 | |
|
|
323 | if (!amount) |
|
|
324 | { |
|
|
325 | // input buffer full |
|
|
326 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
|
|
327 | return; |
|
|
328 | } |
|
|
329 | |
|
|
330 | amount = read (fd, inbuf + inbuf_len, amount); |
|
|
331 | |
|
|
332 | if (!amount) |
|
|
333 | { |
|
|
334 | destroy (); |
|
|
335 | return; |
|
|
336 | } |
|
|
337 | else if (amount < 0) |
|
|
338 | { |
|
|
339 | if (errno != EAGAIN && errno != EINTR) |
|
|
340 | { |
|
|
341 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
342 | destroy (); |
|
|
343 | return; |
|
|
344 | } |
|
|
345 | |
|
|
346 | // should not be here, normally |
|
|
347 | } |
|
|
348 | else |
|
|
349 | { |
|
|
350 | inbuf_len += amount; |
|
|
351 | |
|
|
352 | cst_tot.ibytes += amount; |
|
|
353 | cst_lst.ibytes += amount; |
|
|
354 | |
|
|
355 | cmd_ev.start (); |
|
|
356 | } |
|
|
357 | } |
|
|
358 | } |
|
|
359 | |
|
|
360 | // called whenever we have additional commands to process |
|
|
361 | void |
|
|
362 | client::cmd_cb (iw &w) |
|
|
363 | { |
|
|
364 | if (handle_packet ()) |
|
|
365 | w.start (); |
|
|
366 | else |
|
|
367 | flush (); |
|
|
368 | } |
|
|
369 | |
|
|
370 | /******************************************************************************* |
|
|
371 | * |
|
|
372 | * Start of write related routines. |
|
|
373 | * |
|
|
374 | ******************************************************************************/ |
|
|
375 | |
|
|
376 | /** |
|
|
377 | * Adds data to a socket buffer for whatever reason. |
|
|
378 | * |
|
|
379 | * ns is the socket we are adding the data to, buf is the start of the |
|
|
380 | * data, and len is the number of bytes to add. |
|
|
381 | */ |
|
|
382 | void |
|
|
383 | client::send (void *buf_, int len) |
|
|
384 | { |
|
|
385 | char *buf = (char *)buf_; |
|
|
386 | char *pos = buf; |
|
|
387 | int amt = 0; |
|
|
388 | |
|
|
389 | if (destroyed () || !buf) |
|
|
390 | return; |
|
|
391 | |
|
|
392 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
|
|
393 | { |
|
|
394 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
|
|
395 | destroy (); |
|
|
396 | return; |
|
|
397 | } |
|
|
398 | |
|
|
399 | int avail, end; |
|
|
400 | |
|
|
401 | /* data + end is where we start putting the new data. The last byte |
|
|
402 | * currently in use is actually data + end -1 |
|
|
403 | */ |
|
|
404 | end = outputbuffer.start + outputbuffer.len; |
|
|
405 | /* The buffer is already in a wrapped state, so adjust end */ |
|
|
406 | if (end >= SOCKETBUFSIZE) |
|
|
407 | end -= SOCKETBUFSIZE; |
|
|
408 | |
|
|
409 | avail = SOCKETBUFSIZE - end; |
|
|
410 | |
|
|
411 | /* We can all fit it behind the current data without wrapping */ |
|
|
412 | if (avail >= len) |
|
|
413 | memcpy (outputbuffer.data + end, buf, len); |
|
|
414 | else |
|
|
415 | { |
|
|
416 | memcpy (outputbuffer.data + end, buf, avail); |
|
|
417 | memcpy (outputbuffer.data, buf + avail, len - avail); |
|
|
418 | } |
|
|
419 | |
|
|
420 | outputbuffer.len += len; |
|
|
421 | } |
|
|
422 | |
|
|
423 | /** |
|
|
424 | * Takes a string of data, and writes it out to the socket. A very handy |
|
|
425 | * shortcut function. |
|
|
426 | */ |
|
|
427 | void |
|
|
428 | client::send_packet (packet &sl) |
|
|
429 | { |
|
|
430 | if (destroyed ()) |
|
|
431 | return; |
|
|
432 | |
|
|
433 | if (sl.length () >= MAXSOCKBUF) |
|
|
434 | { |
|
|
435 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
|
|
436 | /* Almost certainly we've overflowed a buffer, so quit now to make |
|
|
437 | * it easier to debug. |
|
|
438 | */ |
|
|
439 | abort (); |
|
|
440 | } |
|
|
441 | |
|
|
442 | if (!sl.length ()) |
|
|
443 | return; |
|
|
444 | |
|
|
445 | assert (sl.hdrlen == 2); |
|
|
446 | |
|
|
447 | sl.buf_ [0] = sl.length () >> 8; |
|
|
448 | sl.buf_ [1] = sl.length () ; |
|
|
449 | |
|
|
450 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
451 | } |
|
|
452 | |
|
|
453 | void |
|
|
454 | client::send_packet (const char *buf, int len) |
|
|
455 | { |
|
|
456 | packet sl; |
|
|
457 | |
|
|
458 | sl << data (buf, len); |
|
|
459 | send_packet (sl); |
|
|
460 | } |
|
|
461 | |
|
|
462 | void |
|
|
463 | client::send_packet (const char *buf) |
|
|
464 | { |
|
|
465 | send_packet (buf, strlen (buf)); |
|
|
466 | } |
|
|
467 | |
|
|
468 | void |
|
|
469 | client::send_packet_printf (const char *format, ...) |
|
|
470 | { |
|
|
471 | packet sl; |
|
|
472 | |
|
|
473 | va_list ap; |
|
|
474 | va_start (ap, format); |
|
|
475 | sl.vprintf (format, ap); |
|
|
476 | va_end (ap); |
|
|
477 | |
|
|
478 | send_packet (sl); |
81 | } |
479 | } |
82 | |
480 | |
83 | /*********************************************************************** |
481 | /*********************************************************************** |
84 | * |
482 | * |
85 | * packet functions/utilities |
483 | * packet functions/utilities |
86 | * |
484 | * |
87 | **********************************************************************/ |
485 | **********************************************************************/ |
|
|
486 | |
|
|
487 | packet::packet (const char *name) |
|
|
488 | { |
|
|
489 | reset (); |
|
|
490 | |
|
|
491 | int len = strlen (name); |
|
|
492 | memcpy (cur, name, len); cur += len; |
|
|
493 | *cur++ = ' '; |
|
|
494 | } |
88 | |
495 | |
89 | packet &packet::operator <<(const data &v) |
496 | packet &packet::operator <<(const data &v) |
90 | { |
497 | { |
91 | if (room () < v.len) |
498 | if (room () < v.len) |
92 | reset (); |
499 | reset (); |
… | |
… | |
118 | { |
525 | { |
119 | return *this << data (v, strlen (v ? v : 0)); |
526 | return *this << data (v, strlen (v ? v : 0)); |
120 | } |
527 | } |
121 | |
528 | |
122 | void |
529 | void |
123 | packet::printf (const char *format, ...) |
530 | packet::vprintf (const char *format, va_list ap) |
124 | { |
531 | { |
125 | int size = room (); |
532 | int size = room (); |
126 | |
533 | |
127 | va_list ap; |
|
|
128 | va_start (ap, format); |
|
|
129 | int len = vsnprintf ((char *)cur, size, format, ap); |
534 | int len = vsnprintf ((char *)cur, size, format, ap); |
130 | va_end (ap); |
|
|
131 | |
535 | |
132 | if (len >= size) |
536 | if (len >= size) |
133 | return reset (); |
537 | return reset (); |
134 | |
538 | |
135 | cur += len; |
539 | cur += len; |
136 | } |
|
|
137 | |
|
|
138 | /****************************************************************************** |
|
|
139 | * |
|
|
140 | * Start of read routines. |
|
|
141 | * |
|
|
142 | ******************************************************************************/ |
|
|
143 | |
|
|
144 | int |
|
|
145 | client_socket::read_packet () |
|
|
146 | { |
|
|
147 | for (;;) |
|
|
148 | { |
|
|
149 | if (inbuf_len >= 2) |
|
|
150 | { |
|
|
151 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
|
|
152 | |
|
|
153 | if (inbuf_len >= 2 + pkt_len) |
|
|
154 | return pkt_len + 2; |
|
|
155 | } |
|
|
156 | |
|
|
157 | int amount = sizeof (inbuf) - inbuf_len; |
|
|
158 | |
|
|
159 | if (amount <= 0) |
|
|
160 | { |
|
|
161 | LOG (llevError, "packet too large");//TODO |
|
|
162 | return -1; |
|
|
163 | } |
|
|
164 | |
|
|
165 | amount = read (fd, inbuf + inbuf_len, amount); |
|
|
166 | |
|
|
167 | if (!amount) |
|
|
168 | { |
|
|
169 | status = Ns_Dead; |
|
|
170 | return -1; |
|
|
171 | } |
|
|
172 | else if (amount < 0) |
|
|
173 | { |
|
|
174 | if (errno != EAGAIN && errno != EINTR) |
|
|
175 | { |
|
|
176 | LOG (llevError, "read error: %s", strerror (errno)); |
|
|
177 | return -1; |
|
|
178 | } |
|
|
179 | |
|
|
180 | return 0; |
|
|
181 | } |
|
|
182 | |
|
|
183 | inbuf_len += amount; |
|
|
184 | |
|
|
185 | cst_tot.ibytes += amount; |
|
|
186 | cst_lst.ibytes += amount; |
|
|
187 | } |
|
|
188 | } |
|
|
189 | |
|
|
190 | void |
|
|
191 | client_socket::skip_packet (int len) |
|
|
192 | { |
|
|
193 | inbuf_len -= len; |
|
|
194 | memmove (inbuf, inbuf + len, inbuf_len); |
|
|
195 | } |
|
|
196 | |
|
|
197 | /******************************************************************************* |
|
|
198 | * |
|
|
199 | * Start of write related routines. |
|
|
200 | * |
|
|
201 | ******************************************************************************/ |
|
|
202 | |
|
|
203 | /** |
|
|
204 | * Adds data to a socket buffer for whatever reason. |
|
|
205 | * |
|
|
206 | * ns is the socket we are adding the data to, buf is the start of the |
|
|
207 | * data, and len is the number of bytes to add. |
|
|
208 | */ |
|
|
209 | |
|
|
210 | static void |
|
|
211 | add_to_buffer (client_socket *ns, char *buf, int len) |
|
|
212 | { |
|
|
213 | int avail, end; |
|
|
214 | |
|
|
215 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
|
|
216 | { |
|
|
217 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
|
|
218 | ns->status = Ns_Dead; |
|
|
219 | return; |
|
|
220 | } |
|
|
221 | |
|
|
222 | /* data + end is where we start putting the new data. The last byte |
|
|
223 | * currently in use is actually data + end -1 |
|
|
224 | */ |
|
|
225 | |
|
|
226 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
|
|
227 | /* The buffer is already in a wrapped state, so adjust end */ |
|
|
228 | if (end >= SOCKETBUFSIZE) |
|
|
229 | end -= SOCKETBUFSIZE; |
|
|
230 | |
|
|
231 | avail = SOCKETBUFSIZE - end; |
|
|
232 | |
|
|
233 | /* We can all fit it behind the current data without wrapping */ |
|
|
234 | if (avail >= len) |
|
|
235 | memcpy (ns->outputbuffer.data + end, buf, len); |
|
|
236 | else |
|
|
237 | { |
|
|
238 | memcpy (ns->outputbuffer.data + end, buf, avail); |
|
|
239 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
|
|
240 | } |
|
|
241 | |
|
|
242 | ns->outputbuffer.len += len; |
|
|
243 | #if 0 |
|
|
244 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
|
|
245 | #endif |
|
|
246 | } |
|
|
247 | |
|
|
248 | /** |
|
|
249 | * Writes data to socket. |
|
|
250 | * |
|
|
251 | * When the socket is clear to write, and we have backlogged data, this |
|
|
252 | * is called to write it out. |
|
|
253 | */ |
|
|
254 | void |
|
|
255 | write_socket_buffer (client_socket * ns) |
|
|
256 | { |
|
|
257 | int amt, max; |
|
|
258 | |
|
|
259 | if (ns->outputbuffer.len == 0) |
|
|
260 | { |
|
|
261 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
|
|
262 | return; |
|
|
263 | } |
|
|
264 | |
|
|
265 | do |
|
|
266 | { |
|
|
267 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
|
|
268 | if (ns->outputbuffer.len < max) |
|
|
269 | max = ns->outputbuffer.len; |
|
|
270 | |
|
|
271 | do |
|
|
272 | { |
|
|
273 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
274 | } |
|
|
275 | while ((amt < 0) && (errno == EINTR)); |
|
|
276 | |
|
|
277 | if (amt < 0) |
|
|
278 | { /* We got an error */ |
|
|
279 | |
|
|
280 | if (errno != EWOULDBLOCK) |
|
|
281 | { |
|
|
282 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
|
|
283 | ns->status = Ns_Dead; |
|
|
284 | return; |
|
|
285 | } |
|
|
286 | else |
|
|
287 | { /* EWOULDBLOCK */ |
|
|
288 | /* can't write it, so store it away. */ |
|
|
289 | ns->can_write = 0; |
|
|
290 | return; |
|
|
291 | } |
|
|
292 | } |
|
|
293 | ns->outputbuffer.start += amt; |
|
|
294 | /* wrap back to start of buffer */ |
|
|
295 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
296 | ns->outputbuffer.start = 0; |
|
|
297 | ns->outputbuffer.len -= amt; |
|
|
298 | #ifdef CS_LOGSTATS |
|
|
299 | cst_tot.obytes += amt; |
|
|
300 | cst_lst.obytes += amt; |
|
|
301 | #endif |
|
|
302 | } |
|
|
303 | while (ns->outputbuffer.len > 0); |
|
|
304 | } |
|
|
305 | |
|
|
306 | /** |
|
|
307 | * This writes data to the socket. - It is very low level - |
|
|
308 | * all we try and do is write out the data to the socket |
|
|
309 | * provided (ns). buf is the data to write, len is the number |
|
|
310 | * of bytes to write. IT doesn't return anything - rather, it |
|
|
311 | * updates the ns structure if we get an error. |
|
|
312 | */ |
|
|
313 | void |
|
|
314 | client_socket::send (void *buf_, int len) |
|
|
315 | { |
|
|
316 | char *buf = (char *)buf_; |
|
|
317 | char *pos = buf; |
|
|
318 | int amt = 0; |
|
|
319 | |
|
|
320 | if (status == Ns_Dead || !buf) |
|
|
321 | { |
|
|
322 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
323 | return; |
|
|
324 | } |
|
|
325 | |
|
|
326 | #ifndef __GNU__ /* This caused problems on Hurd */ |
|
|
327 | if (!can_write) |
|
|
328 | { |
|
|
329 | add_to_buffer (this, buf, len); |
|
|
330 | return; |
|
|
331 | } |
|
|
332 | #endif |
|
|
333 | |
|
|
334 | /* If we manage to write more than we wanted, take it as a bonus */ |
|
|
335 | while (len > 0) |
|
|
336 | { |
|
|
337 | do |
|
|
338 | { |
|
|
339 | amt = write (fd, pos, len); |
|
|
340 | } |
|
|
341 | while ((amt < 0) && (errno == EINTR)); |
|
|
342 | |
|
|
343 | if (amt < 0) |
|
|
344 | { /* We got an error */ |
|
|
345 | if (errno != EWOULDBLOCK) |
|
|
346 | { |
|
|
347 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
|
|
348 | errno, strerror (errno)); |
|
|
349 | status = Ns_Dead; |
|
|
350 | return; |
|
|
351 | } |
|
|
352 | else |
|
|
353 | { /* EWOULDBLOCK */ |
|
|
354 | /* can't write it, so store it away. */ |
|
|
355 | add_to_buffer (this, pos, len); |
|
|
356 | can_write = 0; |
|
|
357 | return; |
|
|
358 | } |
|
|
359 | } |
|
|
360 | /* amt gets set to 0 above in blocking code, so we do this as |
|
|
361 | * an else if to make sure we don't reprocess it. |
|
|
362 | */ |
|
|
363 | else if (amt == 0) |
|
|
364 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
|
|
365 | |
|
|
366 | len -= amt; |
|
|
367 | pos += amt; |
|
|
368 | #ifdef CS_LOGSTATS |
|
|
369 | cst_tot.obytes += amt; |
|
|
370 | cst_lst.obytes += amt; |
|
|
371 | #endif |
|
|
372 | } |
|
|
373 | } |
|
|
374 | |
|
|
375 | /** |
|
|
376 | * Takes a string of data, and writes it out to the socket. A very handy |
|
|
377 | * shortcut function. |
|
|
378 | */ |
|
|
379 | |
|
|
380 | void |
|
|
381 | client_socket::send_packet (packet &sl) |
|
|
382 | { |
|
|
383 | Send_With_Handling (this, &sl); |
|
|
384 | } |
|
|
385 | |
|
|
386 | void |
|
|
387 | client_socket::send_packet (const char *buf, int len) |
|
|
388 | { |
|
|
389 | packet sl; |
|
|
390 | |
|
|
391 | sl << data (buf, len); |
|
|
392 | send_packet (sl); |
|
|
393 | } |
|
|
394 | |
|
|
395 | void |
|
|
396 | client_socket::send_packet (const char *buf) |
|
|
397 | { |
|
|
398 | send_packet (buf, strlen (buf)); |
|
|
399 | } |
|
|
400 | |
|
|
401 | /** |
|
|
402 | * Calls Write_To_Socket to send data to the client. |
|
|
403 | * |
|
|
404 | * The only difference in this function is that we take a packet |
|
|
405 | *, and we prepend the length information. |
|
|
406 | */ |
|
|
407 | void |
|
|
408 | Send_With_Handling (client_socket *ns, packet *msg) |
|
|
409 | { |
|
|
410 | unsigned char sbuf[4]; |
|
|
411 | |
|
|
412 | if (ns->status == Ns_Dead || !msg) |
|
|
413 | return; |
|
|
414 | |
|
|
415 | if (msg->length () >= MAXSOCKBUF) |
|
|
416 | { |
|
|
417 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->length ()); |
|
|
418 | /* Almost certainly we've overflowed a buffer, so quite now to make |
|
|
419 | * it easier to debug. |
|
|
420 | */ |
|
|
421 | abort (); |
|
|
422 | } |
|
|
423 | |
|
|
424 | sbuf[0] = ((uint32) (msg->length ()) >> 8); |
|
|
425 | sbuf[1] = ((uint32) (msg->length ()) ); |
|
|
426 | |
|
|
427 | if (ns->status != Ns_Old) |
|
|
428 | ns->send (sbuf, 2); |
|
|
429 | |
|
|
430 | ns->send (msg->buf, msg->length ()); |
|
|
431 | } |
540 | } |
432 | |
541 | |
433 | /****************************************************************************** |
542 | /****************************************************************************** |
434 | * |
543 | * |
435 | * statistics logging functions. |
544 | * statistics logging functions. |