1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2018 Marc Alexander Lehmann / the Deliantra team |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
5 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
6 | * |
6 | * |
7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
7 | * Deliantra is free software: you can redistribute it and/or modify it under |
8 | * under the terms of the GNU General Public License as published by the Free |
8 | * the terms of the Affero GNU General Public License as published by the |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
9 | * Free Software Foundation, either version 3 of the License, or (at your |
10 | * any later version. |
10 | * option) any later version. |
11 | * |
11 | * |
12 | * This program is distributed in the hope that it will be useful, but |
12 | * This program is distributed in the hope that it will be useful, |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * for more details. |
15 | * GNU General Public License for more details. |
16 | * |
16 | * |
17 | * You should have received a copy of the GNU General Public License along |
17 | * You should have received a copy of the Affero GNU General Public License |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
18 | * and the GNU General Public License along with this program. If not, see |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | * <http://www.gnu.org/licenses/>. |
20 | * |
20 | * |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
21 | * The authors can be reached via e-mail to <support@deliantra.net> |
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 | * |
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28 | * \date 2003-12-02 |
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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 | */ |
22 | */ |
35 | |
23 | |
36 | using namespace std; |
24 | using namespace std; |
37 | |
25 | |
38 | #include <global.h> |
26 | #include <global.h> |
39 | #include <sproto.h> |
27 | #include <sproto.h> |
40 | #include <cstdarg> |
28 | #include <cstdarg> |
41 | |
29 | |
42 | #ifdef __linux__ |
30 | #if HAVE_TCP_INFO |
43 | # include <sys/types.h> |
31 | # include <sys/types.h> |
44 | # include <sys/socket.h> |
32 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
33 | # include <netinet/in.h> |
46 | # include <netinet/tcp.h> |
34 | # include <netinet/tcp.h> |
47 | #endif |
35 | #endif |
48 | |
36 | |
49 | // disconnect a socket after this many seconds without an ack |
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50 | #define SOCKET_TIMEOUT 8. |
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51 | |
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52 | // force a packet when idle for more than this many seconds, |
37 | // force a packet when idle for more than this many seconds, |
53 | // forcing an ack regularly. |
38 | // forcing an ack regularly. |
54 | #define IDLE_PING 2. |
39 | #define IDLE_PING 2. |
55 | |
40 | |
56 | void |
41 | void |
57 | client::flush () |
42 | client::flush () |
58 | { |
43 | { |
59 | if (destroyed ()) |
44 | if (destroyed ()) |
60 | return; |
45 | return; |
61 | |
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62 | #ifdef __linux__ //TODO: this is available on bsds, too, use a configure test. |
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63 | // check about once per second, spread evenly over all clients |
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64 | if (!((pticks + fd) & 7)) |
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65 | { |
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66 | // check time of last ack, and, if too old, kill connection |
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67 | struct tcp_info tcpi; |
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68 | socklen_t len = sizeof (tcpi); |
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69 | |
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70 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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71 | { |
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72 | rtt = tcpi.tcpi_rtt; |
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73 | rttvar = tcpi.tcpi_rttvar; |
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74 | |
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75 | if (tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
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76 | { |
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77 | send_msg (NDI_RED, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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78 | write_outputbuffer (); |
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79 | |
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80 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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81 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
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82 | destroy (); |
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83 | } |
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84 | } |
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85 | } |
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86 | #endif |
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87 | |
46 | |
88 | /** |
47 | /** |
89 | * Writes data to socket. |
48 | * Writes data to socket. |
90 | * |
49 | * |
91 | * When the socket is clear to write, and we have backlogged data, this |
50 | * When the socket is clear to write, and we have backlogged data, this |
92 | * is called to write it out. |
51 | * is called to write it out. |
93 | */ |
52 | */ |
94 | |
53 | |
95 | // write a nop to the socket at least every IDLE_NOP seconds. |
54 | // write a nop to the socket at least every IDLE_PING seconds. |
96 | if (!outputbuffer.len) |
55 | if (!outputbuffer.len) |
97 | { |
56 | { |
98 | if (last_send + IDLE_PING <= NOW) |
57 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
99 | { |
58 | { |
100 | // this is a bit ugly, but map1/map1a seem to be the only |
59 | // this is a bit ugly, but map1a seems to be the only |
101 | // nop'able commands and they are quite small. |
60 | // nop'able command and it is quite small. |
102 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
61 | packet sl ("map1a"); |
103 | send_packet (sl); |
62 | send_packet (sl); |
104 | } |
63 | } |
105 | else |
64 | else |
106 | return; |
65 | return; |
107 | } |
66 | } |
108 | |
67 | |
109 | if (socket_ev.poll () & PE_W) |
68 | if (socket_ev.poll () & EV_WRITE) |
110 | return; |
69 | return; |
111 | |
70 | |
112 | last_send = NOW; |
71 | last_send = NOW; |
113 | write_outputbuffer (); |
72 | write_outputbuffer (); |
114 | } |
73 | } |
… | |
… | |
141 | // just retry |
100 | // just retry |
142 | } |
101 | } |
143 | else if (errno == EAGAIN) |
102 | else if (errno == EAGAIN) |
144 | { |
103 | { |
145 | // delay till ready |
104 | // delay till ready |
146 | socket_ev.poll (socket_ev.poll () | PE_W); |
105 | socket_ev.poll (socket_ev.poll () | EV_WRITE); |
147 | socket_ev.start (); |
106 | socket_ev.start (); |
148 | return; |
107 | return; |
149 | } |
108 | } |
150 | else |
109 | else |
151 | { |
110 | { |
… | |
… | |
153 | destroy (); |
112 | destroy (); |
154 | return; |
113 | return; |
155 | } |
114 | } |
156 | } |
115 | } |
157 | |
116 | |
158 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
117 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
159 | } |
118 | } |
160 | |
119 | |
161 | /****************************************************************************** |
120 | /****************************************************************************** |
162 | * |
121 | * |
163 | * Start of read routines. |
122 | * Start of read routines. |
… | |
… | |
174 | if (inbuf_len >= 2 + pkt_len) |
133 | if (inbuf_len >= 2 + pkt_len) |
175 | return 2 + pkt_len; |
134 | return 2 + pkt_len; |
176 | |
135 | |
177 | if (inbuf_len == sizeof (inbuf)) |
136 | if (inbuf_len == sizeof (inbuf)) |
178 | { |
137 | { |
179 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
138 | send_packet_printf ("msg %d log input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
180 | destroy (); |
139 | destroy (); |
181 | return -1; |
140 | return -1; |
182 | } |
141 | } |
183 | } |
142 | } |
184 | |
143 | |
… | |
… | |
192 | memmove (inbuf, inbuf + len, inbuf_len); |
151 | memmove (inbuf, inbuf + len, inbuf_len); |
193 | } |
152 | } |
194 | |
153 | |
195 | /***************************************************************************** |
154 | /***************************************************************************** |
196 | * Start of command dispatch area. |
155 | * Start of command dispatch area. |
197 | * The commands here are protocol commands. |
156 | * The commands here are protocol commands. |
198 | ****************************************************************************/ |
157 | ****************************************************************************/ |
199 | |
158 | |
200 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
159 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
201 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
160 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
202 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
161 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
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162 | |
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163 | static void |
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164 | NopCmd (char *, int, client *) |
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165 | { |
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166 | // do nothing |
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167 | } |
203 | |
168 | |
204 | /** |
169 | /** |
205 | * Dispatch table for the server. |
170 | * Dispatch table for the server. |
206 | */ |
171 | */ |
207 | static struct packet_type packets[] = { |
172 | static struct packet_type packets[] = { |
208 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
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209 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
173 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND }, |
210 | |
174 | |
211 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
175 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
212 | {"ex", PC(ExCmd) PF_PLAYING }, |
176 | {"ex", PC(ExCmd) PF_PLAYING }, |
213 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
177 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
214 | {"lookat", PC(LookAt) PF_PLAYING }, |
178 | {"lookat", PC(LookAt) PF_PLAYING }, |
215 | {"lock", PC(LockItem) PF_PLAYING }, |
179 | {"lock", PC(LockItem) PF_PLAYING }, |
216 | {"mark", PC(MarkItem) PF_PLAYING }, |
180 | {"mark", PC(MarkItem) PF_PLAYING }, |
217 | {"move", PC(MoveCmd) PF_PLAYING }, |
181 | {"move", PC(MoveCmd) PF_PLAYING }, |
218 | {"ext", PC(ExtCmd) 0 }, // CF+ |
182 | {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra |
219 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
183 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
220 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
184 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra |
221 | |
185 | |
222 | {"reply", SC(ReplyCmd) 0 }, |
186 | {"reply", SC(ReplyCmd) 0 }, |
223 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
187 | {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra |
224 | {"addme", SC(AddMeCmd) 0 }, |
188 | {"addme", SC(AddMeCmd) 0 }, |
225 | {"askface", SC(AskFaceCmd) 0 }, |
189 | {"askface", SC(AskFaceCmd) 0 }, |
226 | {"requestinfo", SC(RequestInfo) 0 }, |
190 | {"requestinfo", SC(RequestInfo) 0 }, |
227 | {"setfacemode", SC(SetFaceMode) 0 }, |
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228 | {"setsound", SC(SetSound) 0 }, |
191 | {"setsound", SC(SetSound) 0 }, |
229 | {"setup", SC(SetUp) 0 }, |
192 | {"setup", SC(SetUp) 0 }, |
230 | {"version", SC(VersionCmd) 0 }, |
193 | {"version", SC(VersionCmd) 0 }, |
231 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
194 | |
232 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
195 | {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled |
233 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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234 | }; |
196 | }; |
235 | |
197 | |
236 | bool |
198 | bool |
237 | client::may_execute (const packet_type *pkt) const |
199 | client::may_execute (const packet_type *pkt) const |
238 | { |
200 | { |
239 | return (!(pkt->flags & PF_PLAYER) || pl) |
201 | return (!(pkt->flags & PF_PLAYER) || pl) |
240 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
202 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
241 | } |
203 | } |
242 | |
204 | |
243 | // HACK: some commands currently should be executed |
205 | // HACK: some commands currently should be executed |
244 | // even when the player is frozen. this hack detects |
206 | // even when the player is frozen. this hack detects |
245 | // those commands. it should be folded into may_execute, |
207 | // those commands. it should be folded into may_execute, |
246 | // but kept seperate to emphasise the hack aspect, i.e. |
208 | // but kept seperate to emphasise the hack aspect, i.e. |
247 | // do it better, then remove. |
209 | // do it better, then remove. |
248 | static bool |
210 | static bool |
249 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
211 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
250 | { |
212 | { |
251 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
213 | if (!(pkt->flags & PF_COMMAND)) |
252 | return false; |
214 | return false; |
253 | |
215 | |
254 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
216 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
255 | return false; |
217 | return false; |
256 | |
218 | |
257 | if (pkt->flags & PF_COMMAND6) |
219 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
258 | { |
220 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
259 | data += 6; |
221 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
260 | len -= 6; |
222 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
261 | } |
223 | if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
262 | |
224 | |
263 | if (len > 4 && !strncmp (data, "say " , 4)) |
225 | if (len == 7 && !strcmp (data, "suicide")) return true; |
264 | return true; |
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265 | if (len > 5 && !strncmp (data, "chat ", 5)) |
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266 | return true; |
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267 | |
226 | |
268 | return false; |
227 | return false; |
269 | } |
228 | } |
270 | |
229 | |
271 | void |
230 | void |
… | |
… | |
273 | { |
232 | { |
274 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
233 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
275 | { |
234 | { |
276 | //TODO: only one format |
235 | //TODO: only one format |
277 | if (pkt->flags & PF_PLAYER) |
236 | if (pkt->flags & PF_PLAYER) |
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237 | { |
278 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
238 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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239 | pl->need_updated_stats (); |
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240 | } |
279 | else |
241 | else |
280 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
242 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
281 | } |
243 | } |
282 | else |
244 | else |
283 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
245 | send_packet_printf ("msg %d log ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
284 | } |
246 | } |
285 | |
247 | |
286 | bool |
248 | bool |
287 | client::handle_packet () |
249 | client::handle_packet () |
288 | { |
250 | { |
… | |
… | |
296 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
258 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
297 | destroy (); |
259 | destroy (); |
298 | return false; |
260 | return false; |
299 | } |
261 | } |
300 | |
262 | |
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263 | uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
301 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
264 | inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
302 | |
265 | |
303 | /* First, break out beginning word. There are at least |
266 | /* First, break out beginning word. There are at least |
304 | * a few commands that do not have any paremeters. If |
267 | * a few commands that do not have any paremeters. If |
305 | * we get such a command, don't worry about trying |
268 | * we get such a command, don't worry about trying |
306 | * to break it up. |
269 | * to break it up. |
… | |
… | |
317 | { |
280 | { |
318 | data = (char *)inbuf + 2; // better read garbage than segfault |
281 | data = (char *)inbuf + 2; // better read garbage than segfault |
319 | datalen = 0; |
282 | datalen = 0; |
320 | } |
283 | } |
321 | |
284 | |
322 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
285 | for (packet_type *pkt = packets; pkt < packets + ecb_array_length (packets); ++pkt) |
323 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
286 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
324 | { |
287 | { |
325 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
288 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
326 | queue_command (pkt, data, datalen); |
289 | queue_command (pkt, data, datalen); |
327 | else |
290 | else |
… | |
… | |
329 | |
292 | |
330 | goto next_packet; |
293 | goto next_packet; |
331 | } |
294 | } |
332 | |
295 | |
333 | // If we get here, we didn't find a valid command. |
296 | // If we get here, we didn't find a valid command. |
334 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
297 | send_packet_printf ("msg %d log ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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298 | |
335 | next_packet: |
299 | next_packet: |
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300 | inbuf [pkt_len] = save_byte; // rather ugly |
336 | skip_packet (pkt_len); |
301 | skip_packet (pkt_len); |
337 | |
302 | |
338 | // input buffer has space again |
303 | // input buffer has space again |
339 | socket_ev.poll (socket_ev.poll () | PE_R); |
304 | socket_ev.poll (socket_ev.poll () | EV_READ); |
340 | |
305 | |
341 | return true; |
306 | return true; |
342 | } |
307 | } |
343 | |
308 | |
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309 | void |
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310 | client::inbuf_handle () |
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311 | { |
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312 | if (!handle_packet ()) |
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313 | return; |
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314 | |
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315 | while (handle_packet ()) |
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316 | ; |
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317 | |
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318 | flush (); |
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319 | } |
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320 | |
344 | // callback called when socket is either readable or writable |
321 | // callback called when socket is either readable or writable |
345 | void |
322 | void |
346 | client::socket_cb (iow &w, int got) |
323 | client::socket_cb (iow &w, int revents) |
347 | { |
324 | { |
348 | //TODO remove when we have better socket cleanup logic |
325 | //TODO remove when we have better socket cleanup logic |
349 | if (destroyed ()) |
326 | if (destroyed ()) |
350 | { |
327 | { |
351 | socket_ev.poll (0); |
328 | socket_ev.poll (0); |
352 | return; |
329 | return; |
353 | } |
330 | } |
354 | |
331 | |
355 | if (got & PE_W) |
332 | if (revents & EV_WRITE) |
356 | { |
333 | { |
357 | write_outputbuffer (); |
334 | write_outputbuffer (); |
358 | |
335 | |
359 | if (!outputbuffer.len) |
336 | if (!outputbuffer.len) |
360 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
337 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
361 | } |
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362 | |
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363 | if (got & PE_R) |
|
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364 | { |
338 | } |
365 | //TODO: rate-limit tcp connection in better ways, important |
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366 | |
339 | |
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340 | if (revents & EV_READ) |
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341 | { |
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342 | int amount; |
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343 | uint8 *rbuf; |
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344 | |
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345 | if (ws_version) |
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346 | { |
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347 | if (ws_inbuf_len + 2048 > ws_inbuf_alloc) |
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348 | ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096); |
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349 | |
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350 | rbuf = ws_inbuf + ws_inbuf_len; |
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351 | amount = ws_inbuf_alloc - ws_inbuf_len; |
|
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352 | } |
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353 | else |
|
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354 | { |
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355 | rbuf = inbuf + inbuf_len; |
367 | int amount = sizeof (inbuf) - inbuf_len; |
356 | amount = sizeof (inbuf) - inbuf_len; |
|
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357 | } |
368 | |
358 | |
369 | if (!amount) |
359 | if (!amount) |
370 | { |
360 | { |
371 | // input buffer full |
361 | // input buffer full |
372 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
362 | LOG (llevError, "input buffer overflow."); |
|
|
363 | destroy (); |
373 | return; |
364 | return; |
374 | } |
365 | } |
375 | |
366 | |
376 | amount = read (fd, inbuf + inbuf_len, amount); |
367 | amount = read (fd, rbuf, amount); |
377 | |
368 | |
378 | if (!amount) |
369 | if (!amount) |
379 | { |
370 | { |
380 | destroy (); |
371 | destroy (); |
381 | return; |
372 | return; |
… | |
… | |
389 | return; |
380 | return; |
390 | } |
381 | } |
391 | |
382 | |
392 | // should not be here, normally |
383 | // should not be here, normally |
393 | } |
384 | } |
|
|
385 | |
|
|
386 | if (ws_version) |
|
|
387 | { |
|
|
388 | ws_inbuf_len += amount; |
|
|
389 | |
|
|
390 | while (ws_inbuf_len) |
|
|
391 | { |
|
|
392 | if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask |
|
|
393 | break; |
|
|
394 | |
|
|
395 | int d = 2; |
|
|
396 | int fin = ws_inbuf [0] & 0x80; |
|
|
397 | int op = ws_inbuf [0] & 0x0f; |
|
|
398 | int len = ws_inbuf [1] & 0x7f; |
|
|
399 | |
|
|
400 | if (len == 126) |
|
|
401 | { |
|
|
402 | len = (ws_inbuf [2] << 8) | ws_inbuf [3]; |
|
|
403 | d += 2; |
|
|
404 | } |
|
|
405 | else if (len == 127) |
|
|
406 | { |
|
|
407 | if (ws_inbuf_len < 2 + 8) |
|
|
408 | return; |
|
|
409 | |
|
|
410 | // we don't do extra long frames, if a browser wants to send >2**32 bytes, |
|
|
411 | // there are bigger issues to fix. |
|
|
412 | len = (ws_inbuf [8] << 8) | ws_inbuf [9]; |
|
|
413 | d += 8; |
|
|
414 | } |
|
|
415 | |
|
|
416 | // we only continue if we have a complete frame |
|
|
417 | if (ws_inbuf_len < d + 4 + len) |
|
|
418 | return; |
|
|
419 | |
|
|
420 | switch (op) |
|
|
421 | { |
|
|
422 | case 0: op = ws_inbuf_type; break; // continuation |
|
|
423 | case 1: ws_inbuf_type = 1; break; // utf-8 |
|
|
424 | case 2: ws_inbuf_type = 2; break; // binary |
|
|
425 | } |
|
|
426 | |
|
|
427 | if (len > sizeof (inbuf) - inbuf_len) |
|
|
428 | { |
|
|
429 | // input buffer full |
|
|
430 | LOG (llevError, "input buffer overflow (ws)."); |
|
|
431 | destroy (); |
|
|
432 | return; |
|
|
433 | } |
|
|
434 | |
|
|
435 | uint8 *buf = inbuf + inbuf_len + 2; |
|
|
436 | |
|
|
437 | for (int i = 0; i < len; ++i) |
|
|
438 | buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)]; |
|
|
439 | |
|
|
440 | // remove frame |
|
|
441 | ws_inbuf_len -= d + 4 + len; |
|
|
442 | memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len); |
|
|
443 | |
|
|
444 | switch (op) |
|
|
445 | { |
|
|
446 | case 1: // utf-8 |
|
|
447 | // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases |
|
|
448 | // but we assume that these extra-long packets will be rare. |
|
|
449 | { |
|
|
450 | uint8 *a = buf; |
|
|
451 | uint8 *b = a; |
|
|
452 | uint8 *c = a + len; |
|
|
453 | |
|
|
454 | for (; a < c; ++a, ++b) |
|
|
455 | { |
|
|
456 | *b = *a; |
|
|
457 | |
|
|
458 | if (*a >= 0x80) |
|
|
459 | *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a; |
|
|
460 | } |
|
|
461 | |
|
|
462 | len -= a - b; |
|
|
463 | } |
|
|
464 | /* FALLTHROUGH */ |
|
|
465 | case 2: // binary |
|
|
466 | inbuf_len += len; |
|
|
467 | |
|
|
468 | if (fin) |
|
|
469 | { |
|
|
470 | inbuf [0] = inbuf_len >> 8; |
|
|
471 | inbuf [1] = inbuf_len; |
|
|
472 | |
|
|
473 | inbuf_len += 2; |
|
|
474 | |
|
|
475 | inbuf_handle (); |
|
|
476 | } |
|
|
477 | break; |
|
|
478 | |
|
|
479 | case 9: // ping |
|
|
480 | { |
|
|
481 | // send pong - we assume ping messages are <64k |
|
|
482 | // as we can't handle >10k at the moment anyway. |
|
|
483 | uint8 hdr [] = { 0x8a, 126, len >> 8, len }; |
|
|
484 | send (hdr, sizeof (hdr)); |
|
|
485 | send (inbuf + inbuf_len, len); |
|
|
486 | } |
|
|
487 | break; |
|
|
488 | |
|
|
489 | case 10: // pong |
|
|
490 | break; |
|
|
491 | |
|
|
492 | case 8: // close |
|
|
493 | default: |
|
|
494 | destroy (); |
|
|
495 | return; |
|
|
496 | } |
|
|
497 | } |
|
|
498 | } |
394 | else |
499 | else |
395 | { |
500 | { |
396 | inbuf_len += amount; |
501 | inbuf_len += amount; |
397 | |
502 | inbuf_handle (); |
398 | cmd_ev.start (); |
|
|
399 | } |
503 | } |
400 | } |
504 | } |
401 | } |
|
|
402 | |
|
|
403 | // called whenever we have additional commands to process |
|
|
404 | void |
|
|
405 | client::cmd_cb (iw &w) |
|
|
406 | { |
|
|
407 | if (handle_packet ()) |
|
|
408 | w.start (); |
|
|
409 | else |
|
|
410 | flush (); |
|
|
411 | } |
505 | } |
412 | |
506 | |
413 | /******************************************************************************* |
507 | /******************************************************************************* |
414 | * |
508 | * |
415 | * Start of write related routines. |
509 | * Start of write related routines. |
… | |
… | |
471 | client::send_packet (packet &sl) |
565 | client::send_packet (packet &sl) |
472 | { |
566 | { |
473 | if (destroyed ()) |
567 | if (destroyed ()) |
474 | return; |
568 | return; |
475 | |
569 | |
476 | if (sl.length () >= MAXSOCKBUF) |
570 | if (sl.length () > MAXSOCKBUF) |
477 | { |
571 | { |
478 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
572 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
479 | /* Almost certainly we've overflowed a buffer, so quit now to make |
573 | /* Almost certainly we've overflowed a buffer, so quit now to make |
480 | * it easier to debug. |
574 | * it easier to debug. |
481 | */ |
575 | */ |
… | |
… | |
483 | } |
577 | } |
484 | |
578 | |
485 | if (!sl.length ()) |
579 | if (!sl.length ()) |
486 | return; |
580 | return; |
487 | |
581 | |
|
|
582 | if (ws_version == 8) |
|
|
583 | { |
|
|
584 | static uint8 buf [MAXSOCKBUF * 2 + 4]; |
|
|
585 | |
|
|
586 | uint8 *b = buf + 4; |
|
|
587 | for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a) |
|
|
588 | { |
|
|
589 | if (*a < 0x80) |
|
|
590 | *b++ = *a; |
|
|
591 | else |
|
|
592 | { |
|
|
593 | *b++ = 0xc0 | ((*a >> 6) & 0x1f); |
|
|
594 | *b++ = 0x80 | ( *a & 0x3f); |
|
|
595 | } |
|
|
596 | } |
|
|
597 | |
|
|
598 | assert (b - buf < sizeof (buf)); |
|
|
599 | |
|
|
600 | int len = b - (buf + 4); |
|
|
601 | |
|
|
602 | if (len < 126) |
|
|
603 | { |
|
|
604 | buf [2] = 0x81; |
|
|
605 | buf [3] = len; |
|
|
606 | |
|
|
607 | send (buf + 2, len + 2); |
|
|
608 | } |
|
|
609 | else |
|
|
610 | { |
|
|
611 | buf [0] = 0x81; |
|
|
612 | buf [1] = 126; |
|
|
613 | buf [2] = len >> 8; |
|
|
614 | buf [3] = len; |
|
|
615 | |
|
|
616 | send (buf, len + 4); |
|
|
617 | } |
|
|
618 | } |
|
|
619 | else if (ws_version == 13) |
|
|
620 | { |
|
|
621 | int len = sl.length (); |
|
|
622 | |
|
|
623 | if (len < 126) |
|
|
624 | { |
|
|
625 | uint8 hdr [] = { 0x82, len }; |
|
|
626 | send (hdr, sizeof (hdr)); |
|
|
627 | } |
|
|
628 | else |
|
|
629 | { |
|
|
630 | uint8 hdr [] = { 0x82, 126, len >> 8, len }; |
|
|
631 | send (hdr, sizeof (hdr)); |
|
|
632 | } |
|
|
633 | |
|
|
634 | send (sl.buf_ + sl.hdrlen, len); |
|
|
635 | } |
|
|
636 | else |
|
|
637 | { |
488 | assert (sl.hdrlen == 2); |
638 | assert (sl.hdrlen == 2); |
489 | |
639 | |
490 | sl.buf_ [0] = sl.length () >> 8; |
640 | sl.buf_ [0] = sl.length () >> 8; |
491 | sl.buf_ [1] = sl.length () ; |
641 | sl.buf_ [1] = sl.length () ; |
492 | |
642 | |
493 | send (sl.buf_, sl.length () + sl.hdrlen); |
643 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
644 | } |
494 | } |
645 | } |
495 | |
646 | |
496 | void |
647 | void |
497 | client::send_packet (const char *buf, int len) |
648 | client::send_packet (const char *buf, int len) |
498 | { |
649 | { |
499 | packet sl; |
650 | packet sl; |
500 | |
651 | |
501 | sl << data (buf, len); |
652 | sl << data_n (buf, len); |
502 | send_packet (sl); |
653 | send_packet (sl); |
503 | } |
654 | } |
504 | |
655 | |
505 | void |
656 | void |
506 | client::send_packet (const char *buf) |
657 | client::send_packet (const char *buf) |
… | |
… | |
520 | |
671 | |
521 | send_packet (sl); |
672 | send_packet (sl); |
522 | } |
673 | } |
523 | |
674 | |
524 | void |
675 | void |
525 | client::send_drawinfo (const char *msg, int flags) |
|
|
526 | { |
|
|
527 | send_packet_printf ("drawinfo %d %s", flags, msg); |
|
|
528 | } |
|
|
529 | |
|
|
530 | void |
|
|
531 | client::send_msg (int color, const char *type, const char *msg) |
676 | client::send_msg (int color, const char *type, const char *msg) |
532 | { |
677 | { |
533 | if (can_msg) |
678 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
534 | send_packet_printf ("msg %d %s %s", color, type, msg); |
|
|
535 | else if (color < 0) |
|
|
536 | return; // client cannot handle this |
|
|
537 | else if (strchr (msg, '<') || strchr (msg, '&')) |
|
|
538 | { |
|
|
539 | //TODO: should escape/modify to old syntax |
|
|
540 | send_packet_printf ("drawinfo %d %s", color, msg); |
|
|
541 | } |
679 | { |
|
|
680 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
681 | return; |
|
|
682 | } |
|
|
683 | |
|
|
684 | int len = strlen (msg); |
|
|
685 | |
|
|
686 | if (!(color & NDI_VERBATIM) |
|
|
687 | && (msg_is_special (msg) |
|
|
688 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
|
|
689 | cfperl_send_msg (this, color, type, msg); |
542 | else |
690 | else |
543 | send_packet_printf ("drawinfo %d %s", color, msg); |
691 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
544 | } |
692 | } |
545 | |
693 | |
546 | /*********************************************************************** |
694 | /*********************************************************************** |
547 | * |
695 | * |
548 | * packet functions/utilities |
696 | * packet functions/utilities |
… | |
… | |
558 | *cur++ = ' '; |
706 | *cur++ = ' '; |
559 | } |
707 | } |
560 | |
708 | |
561 | packet &packet::operator <<(const ber32 v) |
709 | packet &packet::operator <<(const ber32 v) |
562 | { |
710 | { |
563 | enum { maxlen = 32 / 7 + 1}; |
711 | enum { maxlen = 32 / 7 + 1 }; |
564 | uint8 buf[maxlen]; |
712 | uint8 buf[maxlen]; |
565 | uint8 *p = buf + maxlen; |
713 | uint8 *p = buf + maxlen; |
566 | uint32 val = v.val; |
714 | uint32 val = v.val; |
567 | |
715 | |
568 | *--p = val & 0x7F; |
716 | *--p = val & 0x7F; |
… | |
… | |
571 | { |
719 | { |
572 | val >>= 7; |
720 | val >>= 7; |
573 | *--p = (val & 0x7F) | 0x80; |
721 | *--p = (val & 0x7F) | 0x80; |
574 | } |
722 | } |
575 | |
723 | |
576 | return *this << data (p, buf + maxlen - p); |
724 | return *this << data_n (p, buf + maxlen - p); |
577 | } |
725 | } |
578 | |
726 | |
579 | packet &packet::operator <<(const data &v) |
727 | packet &packet::operator <<(const data_n &v) |
580 | { |
728 | { |
581 | if (room () < v.len) |
729 | if (room () < v.len) |
582 | reset (); |
730 | reset (); |
583 | else |
731 | else |
584 | { |
732 | { |
… | |
… | |
593 | } |
741 | } |
594 | |
742 | |
595 | packet &packet::operator <<(const data8 &v) |
743 | packet &packet::operator <<(const data8 &v) |
596 | { |
744 | { |
597 | unsigned int len = min (v.len, 0x00FF); |
745 | unsigned int len = min (v.len, 0x00FF); |
598 | return *this << uint8 (len) << data (v.ptr, len); |
746 | return *this << uint8 (len) << data_n (v.ptr, len); |
599 | } |
747 | } |
600 | |
748 | |
601 | packet &packet::operator <<(const data16 &v) |
749 | packet &packet::operator <<(const data16 &v) |
602 | { |
750 | { |
603 | unsigned int len = min (v.len, 0xFFFF); |
751 | unsigned int len = min (v.len, 0xFFFF); |
604 | return *this << uint16 (len) << data (v.ptr, len); |
752 | return *this << uint16 (len) << data_n (v.ptr, len); |
605 | } |
753 | } |
606 | |
754 | |
607 | packet &packet::operator <<(const char *v) |
755 | packet &packet::operator <<(const char *v) |
608 | { |
756 | { |
609 | return *this << data (v, strlen (v ? v : 0)); |
757 | return *this << data_n (v, v ? strlen (v) : 0); |
610 | } |
758 | } |
611 | |
759 | |
612 | void |
760 | void |
613 | packet::vprintf (const char *format, va_list ap) |
761 | packet::vprintf (const char *format, va_list ap) |
614 | { |
762 | { |