1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | |
3 | * |
4 | Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | Copyright (C) 1992 Frank Tore Johansen |
5 | * |
6 | |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
7 | * the terms of the Affero GNU General Public License as published by the |
9 | the Free Software Foundation; either version 2 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
10 | (at your option) any later version. |
9 | * option) any later version. |
11 | |
10 | * |
12 | This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
16 | |
15 | * |
17 | You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the Affero GNU General Public License |
18 | along with this program; if not, write to the Free Software |
17 | * and the GNU General Public License along with this program. If not, see |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
18 | * <http://www.gnu.org/licenses/>. |
20 | |
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21 | The author can be reached via e-mail to mark@pyramid.com |
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22 | */ |
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23 | |
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24 | /** |
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25 | * \file |
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26 | * Low-level socket-related functions. |
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27 | * |
19 | * |
28 | * \date 2003-12-02 |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
29 | * |
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30 | * Contains some base functions that both the client and server |
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31 | * can use. As such, depending what we are being compiled for will |
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32 | * determine what we can include. the client is designed have |
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33 | * CFCLIENT defined as part of its compile flags. |
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34 | */ |
21 | */ |
35 | |
22 | |
36 | using namespace std; |
23 | using namespace std; |
37 | |
24 | |
38 | #include <global.h> |
25 | #include <global.h> |
39 | #include <sproto.h> |
26 | #include <sproto.h> |
40 | #include <cstdarg> |
27 | #include <cstdarg> |
41 | |
28 | |
42 | #ifdef __linux__ |
29 | #if HAVE_TCP_INFO |
43 | # include <sys/types.h> |
30 | # include <sys/types.h> |
44 | # include <sys/socket.h> |
31 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
32 | # include <netinet/in.h> |
46 | # 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 * 1000 |
38 | #define IDLE_PING 2. |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
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53 | |
39 | |
54 | void |
40 | void |
55 | client::flush () |
41 | client::flush () |
56 | { |
42 | { |
57 | if (destroyed ()) |
43 | if (destroyed ()) |
58 | return; |
44 | return; |
59 | |
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60 | #ifdef __linux__ |
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61 | // check time of last ack, and, if too old, kill connection |
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62 | struct tcp_info tcpi; |
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63 | socklen_t len = sizeof (tcpi); |
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64 | |
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65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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66 | { |
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67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
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68 | |
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69 | rtt = tcpi.tcpi_rtt; |
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70 | rttvar = tcpi.tcpi_rttvar; |
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71 | |
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72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
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73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
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74 | { |
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75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
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77 | destroy (); |
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78 | } |
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79 | } |
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80 | #endif |
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81 | |
45 | |
82 | /** |
46 | /** |
83 | * Writes data to socket. |
47 | * Writes data to socket. |
84 | * |
48 | * |
85 | * When the socket is clear to write, and we have backlogged data, this |
49 | * When the socket is clear to write, and we have backlogged data, this |
86 | * is called to write it out. |
50 | * is called to write it out. |
87 | */ |
51 | */ |
88 | |
52 | |
89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
53 | // write a nop to the socket at least every IDLE_PING seconds. |
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54 | if (!outputbuffer.len) |
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55 | { |
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56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
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57 | { |
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58 | // this is a bit ugly, but map1a seems to be the only |
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59 | // nop'able command and it is quite small. |
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60 | packet sl ("map1a"); |
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61 | send_packet (sl); |
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62 | } |
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63 | else |
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64 | return; |
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65 | } |
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66 | |
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67 | if (socket_ev.poll () & EV_WRITE) |
90 | return; |
68 | return; |
91 | |
69 | |
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70 | last_send = NOW; |
92 | write_outputbuffer (); |
71 | write_outputbuffer (); |
93 | } |
72 | } |
94 | |
73 | |
95 | void |
74 | void |
96 | client::write_outputbuffer () |
75 | client::write_outputbuffer () |
… | |
… | |
106 | /* wrap back to start of buffer */ |
85 | /* wrap back to start of buffer */ |
107 | if (outputbuffer.start == SOCKETBUFSIZE) |
86 | if (outputbuffer.start == SOCKETBUFSIZE) |
108 | outputbuffer.start = 0; |
87 | outputbuffer.start = 0; |
109 | |
88 | |
110 | outputbuffer.len -= res; |
89 | outputbuffer.len -= res; |
111 | #ifdef CS_LOGSTATS |
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112 | cst_tot.obytes += res; |
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113 | cst_lst.obytes += res; |
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114 | #endif |
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115 | } |
90 | } |
116 | else if (res == 0) |
91 | else if (res == 0) |
117 | { |
92 | { |
118 | LOG (llevError, "socket write failed, connection closed.\n"); |
93 | LOG (llevError, "socket write failed, connection closed.\n"); |
119 | destroy (); |
94 | destroy (); |
… | |
… | |
124 | // just retry |
99 | // just retry |
125 | } |
100 | } |
126 | else if (errno == EAGAIN) |
101 | else if (errno == EAGAIN) |
127 | { |
102 | { |
128 | // delay till ready |
103 | // delay till ready |
129 | socket_ev.poll (socket_ev.poll () | PE_W); |
104 | socket_ev.poll (socket_ev.poll () | EV_WRITE); |
130 | socket_ev.start (); |
105 | socket_ev.start (); |
131 | return; |
106 | return; |
132 | } |
107 | } |
133 | else |
108 | else |
134 | { |
109 | { |
… | |
… | |
136 | destroy (); |
111 | destroy (); |
137 | return; |
112 | return; |
138 | } |
113 | } |
139 | } |
114 | } |
140 | |
115 | |
141 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
116 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
142 | } |
117 | } |
143 | |
118 | |
144 | /****************************************************************************** |
119 | /****************************************************************************** |
145 | * |
120 | * |
146 | * Start of read routines. |
121 | * Start of read routines. |
… | |
… | |
157 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
158 | return 2 + pkt_len; |
133 | return 2 + pkt_len; |
159 | |
134 | |
160 | if (inbuf_len == sizeof (inbuf)) |
135 | if (inbuf_len == sizeof (inbuf)) |
161 | { |
136 | { |
162 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
137 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
163 | destroy (); |
138 | destroy (); |
164 | return -1; |
139 | return -1; |
165 | } |
140 | } |
166 | } |
141 | } |
167 | |
142 | |
… | |
… | |
182 | |
157 | |
183 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
158 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
184 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
159 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
185 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
160 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
186 | |
161 | |
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162 | static void |
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163 | NopCmd (char *, int, client *) |
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164 | { |
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165 | // do nothing |
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166 | } |
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167 | |
187 | /** |
168 | /** |
188 | * Dispatch table for the server. |
169 | * Dispatch table for the server. |
189 | */ |
170 | */ |
190 | static struct packet_type packets[] = { |
171 | static struct packet_type packets[] = { |
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
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192 | {"command", PC(PlayerCmd) PF_PLAYING }, |
172 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND }, |
193 | |
173 | |
194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
174 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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175 | {"ex", PC(ExCmd) PF_PLAYING }, |
195 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
176 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
196 | {"lookat", PC(LookAt) PF_PLAYING }, |
177 | {"lookat", PC(LookAt) PF_PLAYING }, |
197 | {"lock", PC(LockItem) PF_PLAYING }, |
178 | {"lock", PC(LockItem) PF_PLAYING }, |
198 | {"mark", PC(MarkItem) PF_PLAYING }, |
179 | {"mark", PC(MarkItem) PF_PLAYING }, |
199 | {"move", PC(MoveCmd) PF_PLAYING }, |
180 | {"move", PC(MoveCmd) PF_PLAYING }, |
200 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
181 | {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra |
201 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
182 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
202 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
183 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra |
203 | |
184 | |
204 | {"reply", SC(ReplyCmd) 0 }, |
185 | {"reply", SC(ReplyCmd) 0 }, |
205 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
186 | {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra |
206 | {"addme", SC(AddMeCmd) 0 }, |
187 | {"addme", SC(AddMeCmd) 0 }, |
207 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
188 | {"askface", SC(AskFaceCmd) 0 }, |
208 | {"requestinfo", SC(RequestInfo) 0 }, |
189 | {"requestinfo", SC(RequestInfo) 0 }, |
209 | {"setfacemode", SC(SetFaceMode) 0 }, |
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210 | {"setsound", SC(SetSound) 0 }, |
190 | {"setsound", SC(SetSound) 0 }, |
211 | {"setup", SC(SetUp) 0 }, |
191 | {"setup", SC(SetUp) 0 }, |
212 | {"version", SC(VersionCmd) 0 }, |
192 | {"version", SC(VersionCmd) 0 }, |
213 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
193 | |
214 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
194 | {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled |
215 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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216 | }; |
195 | }; |
217 | |
196 | |
218 | bool |
197 | bool |
219 | client::may_execute (const packet_type *pkt) const |
198 | client::may_execute (const packet_type *pkt) const |
220 | { |
199 | { |
221 | return (!(pkt->flags & PF_PLAYER) || pl) |
200 | return (!(pkt->flags & PF_PLAYER) || pl) |
222 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
201 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
223 | } |
202 | } |
224 | |
203 | |
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204 | // HACK: some commands currently should be executed |
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205 | // even when the player is frozen. this hack detects |
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206 | // those commands. it should be folded into may_execute, |
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207 | // but kept seperate to emphasise the hack aspect, i.e. |
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208 | // do it better, then remove. |
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209 | static bool |
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210 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
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211 | { |
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212 | if (!(pkt->flags & PF_COMMAND)) |
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213 | return false; |
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214 | |
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215 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
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216 | return false; |
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217 | |
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218 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
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219 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
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220 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
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221 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
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222 | if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
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223 | |
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224 | if (len == 7 && !strcmp (data, "suicide")) return true; |
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225 | |
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226 | return false; |
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227 | } |
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228 | |
225 | void |
229 | void |
226 | client::execute (const packet_type *pkt, char *data, int datalen) |
230 | client::execute (const packet_type *pkt, char *data, int datalen) |
227 | { |
231 | { |
228 | if (may_execute (pkt)) |
232 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
229 | { |
233 | { |
230 | //TODO: only one format |
234 | //TODO: only one format |
231 | if (pkt->flags & PF_PLAYER) |
235 | if (pkt->flags & PF_PLAYER) |
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236 | { |
232 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
237 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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238 | pl->need_updated_stats (); |
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239 | } |
233 | else |
240 | else |
234 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
241 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
235 | } |
242 | } |
236 | else |
243 | else |
237 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
244 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
238 | } |
245 | } |
239 | |
246 | |
240 | bool |
247 | bool |
241 | client::handle_packet () |
248 | client::handle_packet () |
242 | { |
249 | { |
… | |
… | |
250 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
257 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
251 | destroy (); |
258 | destroy (); |
252 | return false; |
259 | return false; |
253 | } |
260 | } |
254 | |
261 | |
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262 | uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
255 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
263 | inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
256 | |
264 | |
257 | /* First, break out beginning word. There are at least |
265 | /* First, break out beginning word. There are at least |
258 | * a few commands that do not have any paremeters. If |
266 | * a few commands that do not have any paremeters. If |
259 | * we get such a command, don't worry about trying |
267 | * we get such a command, don't worry about trying |
260 | * to break it up. |
268 | * to break it up. |
… | |
… | |
271 | { |
279 | { |
272 | data = (char *)inbuf + 2; // better read garbage than segfault |
280 | data = (char *)inbuf + 2; // better read garbage than segfault |
273 | datalen = 0; |
281 | datalen = 0; |
274 | } |
282 | } |
275 | |
283 | |
276 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
284 | for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt) |
277 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
285 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
278 | { |
286 | { |
279 | if (pkt->flags & PF_PLAYER) |
287 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
280 | queue_command (pkt, data, datalen); |
288 | queue_command (pkt, data, datalen); |
281 | else |
289 | else |
282 | execute (pkt, data, datalen); |
290 | execute (pkt, data, datalen); |
283 | |
291 | |
284 | goto next_packet; |
292 | goto next_packet; |
285 | } |
293 | } |
286 | |
294 | |
287 | // If we get here, we didn't find a valid command. |
295 | // 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); |
296 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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297 | |
289 | next_packet: |
298 | next_packet: |
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299 | inbuf [pkt_len] = save_byte; // rather ugly |
290 | skip_packet (pkt_len); |
300 | skip_packet (pkt_len); |
291 | |
301 | |
292 | // input buffer has space again |
302 | // input buffer has space again |
293 | socket_ev.poll (socket_ev.poll () | PE_R); |
303 | socket_ev.poll (socket_ev.poll () | EV_READ); |
294 | |
304 | |
295 | return true; |
305 | return true; |
296 | } |
306 | } |
297 | |
307 | |
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308 | void |
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309 | client::inbuf_handle () |
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310 | { |
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311 | if (!handle_packet ()) |
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312 | return; |
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313 | |
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314 | while (handle_packet ()) |
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315 | ; |
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316 | |
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317 | flush (); |
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318 | } |
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319 | |
298 | // callback called when socket is either readable or writable |
320 | // callback called when socket is either readable or writable |
299 | void |
321 | void |
300 | client::socket_cb (iow &w, int got) |
322 | client::socket_cb (iow &w, int revents) |
301 | { |
323 | { |
302 | //TODO remove when we have better socket cleanup logic |
324 | //TODO remove when we have better socket cleanup logic |
303 | if (destroyed ()) |
325 | if (destroyed ()) |
304 | { |
326 | { |
305 | socket_ev.poll (0); |
327 | socket_ev.poll (0); |
306 | return; |
328 | return; |
307 | } |
329 | } |
308 | |
330 | |
309 | if (got & PE_W) |
331 | if (revents & EV_WRITE) |
310 | { |
332 | { |
311 | write_outputbuffer (); |
333 | write_outputbuffer (); |
312 | |
334 | |
313 | if (!outputbuffer.len) |
335 | if (!outputbuffer.len) |
314 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
336 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
315 | } |
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316 | |
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317 | if (got & PE_R) |
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318 | { |
337 | } |
319 | //TODO: rate-limit tcp connection in better ways, important |
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320 | |
338 | |
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339 | if (revents & EV_READ) |
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340 | { |
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341 | int amount; |
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342 | uint8 *rbuf; |
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343 | |
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344 | if (ws_version) |
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345 | { |
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346 | if (ws_inbuf_len + 2048 > ws_inbuf_alloc) |
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347 | ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096); |
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348 | |
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349 | rbuf = ws_inbuf + ws_inbuf_len; |
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350 | amount = ws_inbuf_alloc - ws_inbuf_len; |
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351 | } |
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352 | else |
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353 | { |
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354 | rbuf = inbuf + inbuf_len; |
321 | int amount = sizeof (inbuf) - inbuf_len; |
355 | amount = sizeof (inbuf) - inbuf_len; |
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356 | } |
322 | |
357 | |
323 | if (!amount) |
358 | if (!amount) |
324 | { |
359 | { |
325 | // input buffer full |
360 | // input buffer full |
326 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
361 | LOG (llevError, "input buffer overflow."); |
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362 | destroy (); |
327 | return; |
363 | return; |
328 | } |
364 | } |
329 | |
365 | |
330 | amount = read (fd, inbuf + inbuf_len, amount); |
366 | amount = read (fd, rbuf, amount); |
331 | |
367 | |
332 | if (!amount) |
368 | if (!amount) |
333 | { |
369 | { |
334 | destroy (); |
370 | destroy (); |
335 | return; |
371 | return; |
… | |
… | |
343 | return; |
379 | return; |
344 | } |
380 | } |
345 | |
381 | |
346 | // should not be here, normally |
382 | // should not be here, normally |
347 | } |
383 | } |
|
|
384 | |
|
|
385 | if (ws_version) |
|
|
386 | { |
|
|
387 | ws_inbuf_len += amount; |
|
|
388 | |
|
|
389 | while (ws_inbuf_len) |
|
|
390 | { |
|
|
391 | if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask |
|
|
392 | break; |
|
|
393 | |
|
|
394 | int d = 2; |
|
|
395 | int fin = ws_inbuf [0] & 0x80; |
|
|
396 | int op = ws_inbuf [0] & 0x0f; |
|
|
397 | int len = ws_inbuf [1] & 0x7f; |
|
|
398 | |
|
|
399 | if (len == 126) |
|
|
400 | { |
|
|
401 | len = (ws_inbuf [2] << 8) | ws_inbuf [3]; |
|
|
402 | d += 2; |
|
|
403 | } |
|
|
404 | else if (len == 127) |
|
|
405 | { |
|
|
406 | if (ws_inbuf_len < 2 + 8) |
|
|
407 | return; |
|
|
408 | |
|
|
409 | // we don't do extra long frames, if a browser wants to send >2**32 bytes, |
|
|
410 | // there are bigger issues to fix. |
|
|
411 | len = (ws_inbuf [8] << 8) | ws_inbuf [9]; |
|
|
412 | d += 8; |
|
|
413 | } |
|
|
414 | |
|
|
415 | // we only continue if we have a complete frame |
|
|
416 | if (ws_inbuf_len < d + 4 + len) |
|
|
417 | return; |
|
|
418 | |
|
|
419 | switch (op) |
|
|
420 | { |
|
|
421 | case 0: op = ws_inbuf_type; break; // continuation |
|
|
422 | case 1: ws_inbuf_type = 1; break; // utf-8 |
|
|
423 | case 2: ws_inbuf_type = 2; break; // binary |
|
|
424 | } |
|
|
425 | |
|
|
426 | if (len > sizeof (inbuf) - inbuf_len) |
|
|
427 | { |
|
|
428 | // input buffer full |
|
|
429 | LOG (llevError, "input buffer overflow (ws)."); |
|
|
430 | destroy (); |
|
|
431 | return; |
|
|
432 | } |
|
|
433 | |
|
|
434 | uint8 *buf = inbuf + inbuf_len + 2; |
|
|
435 | |
|
|
436 | for (int i = 0; i < len; ++i) |
|
|
437 | buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)]; |
|
|
438 | |
|
|
439 | // remove frame |
|
|
440 | ws_inbuf_len -= d + 4 + len; |
|
|
441 | memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len); |
|
|
442 | |
|
|
443 | switch (op) |
|
|
444 | { |
|
|
445 | case 1: // utf-8 |
|
|
446 | // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases |
|
|
447 | // but we assume that these extra-long packets will be rare. |
|
|
448 | { |
|
|
449 | uint8 *a = buf; |
|
|
450 | uint8 *b = a; |
|
|
451 | uint8 *c = a + len; |
|
|
452 | |
|
|
453 | for (; a < c; ++a, ++b) |
|
|
454 | { |
|
|
455 | *b = *a; |
|
|
456 | |
|
|
457 | if (*a >= 0x80) |
|
|
458 | *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a; |
|
|
459 | } |
|
|
460 | |
|
|
461 | len -= a - b; |
|
|
462 | } |
|
|
463 | /* FALLTHROUGH */ |
|
|
464 | case 2: // binary |
|
|
465 | inbuf_len += len; |
|
|
466 | |
|
|
467 | if (fin) |
|
|
468 | { |
|
|
469 | inbuf [0] = inbuf_len >> 8; |
|
|
470 | inbuf [1] = inbuf_len; |
|
|
471 | |
|
|
472 | inbuf_len += 2; |
|
|
473 | |
|
|
474 | inbuf_handle (); |
|
|
475 | } |
|
|
476 | break; |
|
|
477 | |
|
|
478 | case 9: // ping |
|
|
479 | { |
|
|
480 | // send pong - we assume ping messages are <64k |
|
|
481 | // as we can't handle >10k at the moment anyway. |
|
|
482 | uint8 hdr [] = { 0x8a, 126, len >> 8, len }; |
|
|
483 | send (hdr, sizeof (hdr)); |
|
|
484 | send (inbuf + inbuf_len, len); |
|
|
485 | } |
|
|
486 | break; |
|
|
487 | |
|
|
488 | case 10: // pong |
|
|
489 | break; |
|
|
490 | |
|
|
491 | case 8: // close |
|
|
492 | default: |
|
|
493 | destroy (); |
|
|
494 | return; |
|
|
495 | } |
|
|
496 | } |
|
|
497 | } |
348 | else |
498 | else |
349 | { |
499 | { |
350 | inbuf_len += amount; |
500 | inbuf_len += amount; |
351 | |
501 | inbuf_handle (); |
352 | cst_tot.ibytes += amount; |
|
|
353 | cst_lst.ibytes += amount; |
|
|
354 | |
|
|
355 | cmd_ev.start (); |
|
|
356 | } |
502 | } |
357 | } |
503 | } |
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 | } |
504 | } |
369 | |
505 | |
370 | /******************************************************************************* |
506 | /******************************************************************************* |
371 | * |
507 | * |
372 | * Start of write related routines. |
508 | * Start of write related routines. |
… | |
… | |
381 | */ |
517 | */ |
382 | void |
518 | void |
383 | client::send (void *buf_, int len) |
519 | client::send (void *buf_, int len) |
384 | { |
520 | { |
385 | char *buf = (char *)buf_; |
521 | char *buf = (char *)buf_; |
386 | char *pos = buf; |
|
|
387 | int amt = 0; |
|
|
388 | |
522 | |
389 | if (destroyed () || !buf) |
523 | if (destroyed () || !buf) |
390 | return; |
524 | return; |
391 | |
525 | |
392 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
526 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
393 | { |
527 | { |
394 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
528 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
395 | destroy (); |
529 | // shutdown the socket, this is safer than destroying it immediately |
|
|
530 | // as lots of code in the callchain might still access the map etc. |
|
|
531 | shutdown (fd, SHUT_RDWR); |
396 | return; |
532 | return; |
397 | } |
533 | } |
398 | |
534 | |
399 | int avail, end; |
535 | int avail, end; |
400 | |
536 | |
… | |
… | |
428 | client::send_packet (packet &sl) |
564 | client::send_packet (packet &sl) |
429 | { |
565 | { |
430 | if (destroyed ()) |
566 | if (destroyed ()) |
431 | return; |
567 | return; |
432 | |
568 | |
433 | if (sl.length () >= MAXSOCKBUF) |
569 | if (sl.length () > MAXSOCKBUF) |
434 | { |
570 | { |
435 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
571 | 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 |
572 | /* Almost certainly we've overflowed a buffer, so quit now to make |
437 | * it easier to debug. |
573 | * it easier to debug. |
438 | */ |
574 | */ |
… | |
… | |
440 | } |
576 | } |
441 | |
577 | |
442 | if (!sl.length ()) |
578 | if (!sl.length ()) |
443 | return; |
579 | return; |
444 | |
580 | |
|
|
581 | if (ws_version == 8) |
|
|
582 | { |
|
|
583 | static uint8 buf [MAXSOCKBUF * 2 + 4]; |
|
|
584 | |
|
|
585 | uint8 *b = buf + 4; |
|
|
586 | for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a) |
|
|
587 | { |
|
|
588 | if (*a < 0x80) |
|
|
589 | *b++ = *a; |
|
|
590 | else |
|
|
591 | { |
|
|
592 | *b++ = 0xc0 | ((*a >> 6) & 0x1f); |
|
|
593 | *b++ = 0x80 | ( *a & 0x3f); |
|
|
594 | } |
|
|
595 | } |
|
|
596 | |
|
|
597 | assert (b - buf < sizeof (buf)); |
|
|
598 | |
|
|
599 | int len = b - (buf + 4); |
|
|
600 | |
|
|
601 | if (len < 126) |
|
|
602 | { |
|
|
603 | buf [2] = 0x81; |
|
|
604 | buf [3] = len; |
|
|
605 | |
|
|
606 | send (buf + 2, len + 2); |
|
|
607 | } |
|
|
608 | else |
|
|
609 | { |
|
|
610 | buf [0] = 0x81; |
|
|
611 | buf [1] = 126; |
|
|
612 | buf [2] = len >> 8; |
|
|
613 | buf [3] = len; |
|
|
614 | |
|
|
615 | send (buf, len + 4); |
|
|
616 | } |
|
|
617 | } |
|
|
618 | else if (ws_version == 13) |
|
|
619 | { |
|
|
620 | int len = sl.length (); |
|
|
621 | |
|
|
622 | if (len < 126) |
|
|
623 | { |
|
|
624 | uint8 hdr [] = { 0x82, len }; |
|
|
625 | send (hdr, sizeof (hdr)); |
|
|
626 | } |
|
|
627 | else |
|
|
628 | { |
|
|
629 | uint8 hdr [] = { 0x82, 126, len >> 8, len }; |
|
|
630 | send (hdr, sizeof (hdr)); |
|
|
631 | } |
|
|
632 | |
|
|
633 | send (sl.buf_ + sl.hdrlen, len); |
|
|
634 | } |
|
|
635 | else |
|
|
636 | { |
445 | assert (sl.hdrlen == 2); |
637 | assert (sl.hdrlen == 2); |
446 | |
638 | |
447 | sl.buf_ [0] = sl.length () >> 8; |
639 | sl.buf_ [0] = sl.length () >> 8; |
448 | sl.buf_ [1] = sl.length () ; |
640 | sl.buf_ [1] = sl.length () ; |
449 | |
641 | |
450 | send (sl.buf_, sl.length () + sl.hdrlen); |
642 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
643 | } |
451 | } |
644 | } |
452 | |
645 | |
453 | void |
646 | void |
454 | client::send_packet (const char *buf, int len) |
647 | client::send_packet (const char *buf, int len) |
455 | { |
648 | { |
… | |
… | |
476 | va_end (ap); |
669 | va_end (ap); |
477 | |
670 | |
478 | send_packet (sl); |
671 | send_packet (sl); |
479 | } |
672 | } |
480 | |
673 | |
|
|
674 | void |
|
|
675 | client::send_msg (int color, const char *type, const char *msg) |
|
|
676 | { |
|
|
677 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
678 | { |
|
|
679 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
680 | return; |
|
|
681 | } |
|
|
682 | |
|
|
683 | int len = strlen (msg); |
|
|
684 | |
|
|
685 | if (!(color & NDI_VERBATIM) |
|
|
686 | && (msg_is_special (msg) |
|
|
687 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
|
|
688 | cfperl_send_msg (this, color, type, msg); |
|
|
689 | else |
|
|
690 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
691 | } |
|
|
692 | |
|
|
693 | void |
|
|
694 | client::send_drawinfo (const char *msg, int flags) |
|
|
695 | { |
|
|
696 | send_msg (flags, "log", msg); |
|
|
697 | } |
|
|
698 | |
481 | /*********************************************************************** |
699 | /*********************************************************************** |
482 | * |
700 | * |
483 | * packet functions/utilities |
701 | * packet functions/utilities |
484 | * |
702 | * |
485 | **********************************************************************/ |
703 | **********************************************************************/ |
… | |
… | |
491 | int len = strlen (name); |
709 | int len = strlen (name); |
492 | memcpy (cur, name, len); cur += len; |
710 | memcpy (cur, name, len); cur += len; |
493 | *cur++ = ' '; |
711 | *cur++ = ' '; |
494 | } |
712 | } |
495 | |
713 | |
|
|
714 | packet &packet::operator <<(const ber32 v) |
|
|
715 | { |
|
|
716 | enum { maxlen = 32 / 7 + 1 }; |
|
|
717 | uint8 buf[maxlen]; |
|
|
718 | uint8 *p = buf + maxlen; |
|
|
719 | uint32 val = v.val; |
|
|
720 | |
|
|
721 | *--p = val & 0x7F; |
|
|
722 | |
|
|
723 | while (val > 0x7F) |
|
|
724 | { |
|
|
725 | val >>= 7; |
|
|
726 | *--p = (val & 0x7F) | 0x80; |
|
|
727 | } |
|
|
728 | |
|
|
729 | return *this << data (p, buf + maxlen - p); |
|
|
730 | } |
|
|
731 | |
496 | packet &packet::operator <<(const data &v) |
732 | packet &packet::operator <<(const data &v) |
497 | { |
733 | { |
498 | if (room () < v.len) |
734 | if (room () < v.len) |
499 | reset (); |
735 | reset (); |
500 | else |
736 | else |
… | |
… | |
537 | return reset (); |
773 | return reset (); |
538 | |
774 | |
539 | cur += len; |
775 | cur += len; |
540 | } |
776 | } |
541 | |
777 | |
542 | /****************************************************************************** |
|
|
543 | * |
|
|
544 | * statistics logging functions. |
|
|
545 | * |
|
|
546 | ******************************************************************************/ |
|
|
547 | |
|
|
548 | #ifdef CS_LOGSTATS |
|
|
549 | |
|
|
550 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
551 | * stats |
|
|
552 | */ |
|
|
553 | CS_Stats cst_tot, cst_lst; |
|
|
554 | |
|
|
555 | /** |
|
|
556 | * Writes out the gathered stats. We clear cst_lst. |
|
|
557 | */ |
|
|
558 | void |
|
|
559 | write_cs_stats (void) |
|
|
560 | { |
|
|
561 | time_t now = time (NULL); |
|
|
562 | |
|
|
563 | /* If no connections recently, don't both to log anything */ |
|
|
564 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
565 | return; |
|
|
566 | |
|
|
567 | /* CSSTAT is put in so scripts can easily find the line */ |
|
|
568 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
569 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
570 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
571 | cst_lst.ibytes = 0; |
|
|
572 | cst_lst.obytes = 0; |
|
|
573 | cst_lst.time_start = now; |
|
|
574 | } |
|
|
575 | #endif |
|
|
576 | |
|
|