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) 1992 Frank Tore Johansen |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | |
5 | * |
6 | This program is free software; you can redistribute it and/or modify |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | 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 |
8 | the Free Software Foundation; either version 2 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | (at your option) any later version. |
9 | * option) any later version. |
10 | |
10 | * |
11 | 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, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
15 | |
15 | * |
16 | 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 |
17 | 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 |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
18 | * <http://www.gnu.org/licenses/>. |
19 | |
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20 | The author can be reached via e-mail to mark@pyramid.com |
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21 | */ |
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22 | |
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23 | /** |
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24 | * \file |
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25 | * Low-level socket-related functions. |
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26 | * |
19 | * |
27 | * \date 2003-12-02 |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
28 | * |
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29 | * Contains some base functions that both the client and server |
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30 | * can use. As such, depending what we are being compiled for will |
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31 | * determine what we can include. the client is designed have |
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32 | * CFCLIENT defined as part of its compile flags. |
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33 | */ |
21 | */ |
34 | |
22 | |
35 | using namespace std; |
23 | using namespace std; |
36 | |
24 | |
37 | #include <global.h> |
25 | #include <global.h> |
38 | #include <newclient.h> |
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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 | # define TCP_HZ 1000 // sorry... |
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47 | # include <netinet/tcp.h> |
33 | # include <netinet/tcp.h> |
48 | #endif |
34 | #endif |
49 | |
35 | |
50 | // 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, |
51 | // easily die in 20 seconds... |
37 | // forcing an ack regularly. |
52 | #define SOCKET_TIMEOUT1 10 |
38 | #define IDLE_PING 2. |
53 | #define SOCKET_TIMEOUT2 20 |
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54 | |
39 | |
55 | void |
40 | void |
56 | client_socket::flush () |
41 | client::flush () |
57 | { |
42 | { |
58 | #ifdef __linux__ |
43 | if (destroyed ()) |
59 | // check time of last ack, and, if too old, kill connection |
44 | return; |
60 | struct tcp_info tcpi; |
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61 | socklen_t len = sizeof (tcpi); |
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62 | |
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63 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
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64 | { |
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65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
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66 | |
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67 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
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68 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
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69 | { |
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70 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
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71 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
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72 | status = Ns_Dead; |
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73 | } |
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74 | } |
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75 | #endif |
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76 | |
45 | |
77 | /** |
46 | /** |
78 | * Writes data to socket. |
47 | * Writes data to socket. |
79 | * |
48 | * |
80 | * 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 |
81 | * is called to write it out. |
50 | * is called to write it out. |
82 | */ |
51 | */ |
83 | |
52 | |
84 | 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) |
85 | return; |
68 | return; |
86 | |
69 | |
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70 | last_send = NOW; |
87 | write_outputbuffer (); |
71 | write_outputbuffer (); |
88 | } |
72 | } |
89 | |
73 | |
90 | void |
74 | void |
91 | client_socket::write_outputbuffer () |
75 | client::write_outputbuffer () |
92 | { |
76 | { |
93 | while (outputbuffer.len) |
77 | while (outputbuffer.len) |
94 | { |
78 | { |
95 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
79 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
96 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
80 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
… | |
… | |
101 | /* wrap back to start of buffer */ |
85 | /* wrap back to start of buffer */ |
102 | if (outputbuffer.start == SOCKETBUFSIZE) |
86 | if (outputbuffer.start == SOCKETBUFSIZE) |
103 | outputbuffer.start = 0; |
87 | outputbuffer.start = 0; |
104 | |
88 | |
105 | outputbuffer.len -= res; |
89 | outputbuffer.len -= res; |
106 | #ifdef CS_LOGSTATS |
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107 | cst_tot.obytes += res; |
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108 | cst_lst.obytes += res; |
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109 | #endif |
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110 | } |
90 | } |
111 | else if (res == 0) |
91 | else if (res == 0) |
112 | { |
92 | { |
113 | LOG (llevError, "socket write failed, connection closed.\n"); |
93 | LOG (llevError, "socket write failed, connection closed.\n"); |
114 | status = Ns_Dead; |
94 | destroy (); |
115 | return; |
95 | return; |
116 | } |
96 | } |
117 | else if (errno == EINTR) |
97 | else if (errno == EINTR) |
118 | { |
98 | { |
119 | // just retry |
99 | // just retry |
120 | } |
100 | } |
121 | else if (errno == EAGAIN) |
101 | else if (errno == EAGAIN) |
122 | { |
102 | { |
123 | // delay till ready |
103 | // delay till ready |
124 | socket_ev.poll (socket_ev.poll () | PE_W); |
104 | socket_ev.poll (socket_ev.poll () | EV_WRITE); |
125 | socket_ev.start (); |
105 | socket_ev.start (); |
126 | return; |
106 | return; |
127 | } |
107 | } |
128 | else |
108 | else |
129 | { |
109 | { |
130 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
110 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
131 | status = Ns_Dead; |
111 | destroy (); |
132 | return; |
112 | return; |
133 | } |
113 | } |
134 | } |
114 | } |
135 | |
115 | |
136 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
116 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
137 | } |
117 | } |
138 | |
118 | |
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119 | /****************************************************************************** |
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120 | * |
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121 | * Start of read routines. |
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122 | * |
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123 | ******************************************************************************/ |
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124 | |
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125 | int |
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126 | client::next_packet () |
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127 | { |
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128 | if (inbuf_len >= 2) |
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129 | { |
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130 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
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131 | |
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132 | if (inbuf_len >= 2 + pkt_len) |
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133 | return 2 + pkt_len; |
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134 | |
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135 | if (inbuf_len == sizeof (inbuf)) |
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136 | { |
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137 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
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138 | destroy (); |
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139 | return -1; |
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140 | } |
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141 | } |
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142 | |
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143 | return 0; |
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144 | } |
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145 | |
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146 | void |
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147 | client::skip_packet (int len) |
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148 | { |
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149 | inbuf_len -= len; |
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150 | memmove (inbuf, inbuf + len, inbuf_len); |
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151 | } |
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152 | |
139 | /*********************************************************************** |
153 | /***************************************************************************** |
140 | * |
154 | * Start of command dispatch area. |
141 | * packet functions/utilities |
155 | * The commands here are protocol commands. |
142 | * |
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143 | **********************************************************************/ |
156 | ****************************************************************************/ |
144 | |
157 | |
145 | packet &packet::operator <<(const data &v) |
158 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
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159 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
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160 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
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161 | |
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162 | static void |
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163 | NopCmd (char *, int, client *) |
146 | { |
164 | { |
147 | if (room () < v.len) |
165 | // do nothing |
148 | reset (); |
166 | } |
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167 | |
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168 | /** |
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169 | * Dispatch table for the server. |
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170 | */ |
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171 | static struct packet_type packets[] = { |
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172 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
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173 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
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174 | |
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175 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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176 | {"ex", PC(ExCmd) PF_PLAYING }, |
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177 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
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178 | {"lookat", PC(LookAt) PF_PLAYING }, |
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179 | {"lock", PC(LockItem) PF_PLAYING }, |
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180 | {"mark", PC(MarkItem) PF_PLAYING }, |
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181 | {"move", PC(MoveCmd) PF_PLAYING }, |
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182 | {"ext", PC(ExtCmd) 0 }, // CF+/Deliantra |
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183 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
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184 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+/Deliantra |
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185 | |
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186 | {"reply", SC(ReplyCmd) 0 }, |
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187 | {"exti", SC(ExtiCmd) 0 }, // CF+/Deliantra |
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188 | {"addme", SC(AddMeCmd) 0 }, |
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189 | {"askface", SC(AskFaceCmd) 0 }, |
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190 | {"requestinfo", SC(RequestInfo) 0 }, |
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191 | {"setsound", SC(SetSound) 0 }, |
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192 | {"setup", SC(SetUp) 0 }, |
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193 | {"version", SC(VersionCmd) 0 }, |
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194 | |
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195 | {"toggleextendedtext", SC(NopCmd) 0 }, // deliantra: disabled |
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196 | }; |
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197 | |
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198 | bool |
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199 | client::may_execute (const packet_type *pkt) const |
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200 | { |
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201 | return (!(pkt->flags & PF_PLAYER) || pl) |
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202 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
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203 | } |
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204 | |
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205 | // HACK: some commands currently should be executed |
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206 | // even when the player is frozen. this hack detects |
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207 | // those commands. it should be folded into may_execute, |
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208 | // but kept seperate to emphasise the hack aspect, i.e. |
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209 | // do it better, then remove. |
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210 | static bool |
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211 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
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212 | { |
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213 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
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214 | return false; |
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215 | |
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216 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
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217 | return false; |
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218 | |
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219 | if (pkt->flags & PF_COMMAND6) |
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220 | { |
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221 | data += 6; |
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222 | len -= 6; |
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223 | } |
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224 | |
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225 | if (len > 4 && data [ 3] == ' ' && !strncmp (data, "say " , 4)) return true; |
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226 | if (len > 5 && data [ 4] == ' ' && !strncmp (data, "chat " , 5)) return true; |
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227 | if (len > 6 && data [ 5] == ' ' && !strncmp (data, "shout " , 6)) return true; |
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228 | if (len > 8 && data [ 7] == ' ' && !strncmp (data, "suicide " , 8)) return true; |
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229 | if (len > 18 && data [17] == ' ' && !strncmp (data, "accept-invitation ", 18)) return true; |
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230 | |
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231 | if (len == 7 && !strcmp (data, "suicide")) return true; |
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232 | |
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233 | return false; |
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234 | } |
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235 | |
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236 | void |
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237 | client::execute (const packet_type *pkt, char *data, int datalen) |
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238 | { |
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239 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
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240 | { |
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241 | //TODO: only one format |
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242 | if (pkt->flags & PF_PLAYER) |
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243 | { |
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244 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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245 | pl->need_updated_stats (); |
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246 | } |
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247 | else |
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248 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
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249 | } |
149 | else |
250 | else |
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251 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
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252 | } |
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253 | |
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254 | bool |
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255 | client::handle_packet () |
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256 | { |
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257 | int pkt_len = next_packet (); |
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258 | |
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259 | if (!pkt_len) |
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260 | return false; |
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261 | else if (pkt_len < 0) |
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262 | { |
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263 | LOG (llevError, "read error on player %s\n", |
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264 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
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265 | destroy (); |
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266 | return false; |
150 | { |
267 | } |
151 | if (v.len) |
268 | |
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269 | uint8_t save_byte = inbuf [pkt_len]; // rather ugly |
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270 | inbuf [pkt_len] = 0; /* temporarily terminate buffer - useful for string data */ |
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271 | |
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272 | /* First, break out beginning word. There are at least |
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273 | * a few commands that do not have any paremeters. If |
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274 | * we get such a command, don't worry about trying |
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275 | * to break it up. |
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276 | */ |
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277 | int datalen; |
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278 | char *data = strchr ((char *)inbuf + 2, ' '); |
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279 | |
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280 | if (data) |
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281 | { |
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282 | *data++ = 0; |
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283 | datalen = pkt_len - (data - (char *)inbuf); |
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284 | } |
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285 | else |
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286 | { |
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287 | data = (char *)inbuf + 2; // better read garbage than segfault |
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288 | datalen = 0; |
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289 | } |
|
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290 | |
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291 | for (packet_type *pkt = packets; pkt < packets + array_length (packets); ++pkt) |
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292 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
152 | { |
293 | { |
153 | memcpy (cur, v.ptr, v.len); |
294 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
154 | cur += v.len; |
295 | queue_command (pkt, data, datalen); |
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296 | else |
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297 | execute (pkt, data, datalen); |
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298 | |
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299 | goto next_packet; |
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300 | } |
|
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301 | |
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302 | // If we get here, we didn't find a valid command. |
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303 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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304 | |
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305 | next_packet: |
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306 | inbuf [pkt_len] = save_byte; // rather ugly |
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307 | skip_packet (pkt_len); |
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308 | |
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309 | // input buffer has space again |
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310 | socket_ev.poll (socket_ev.poll () | EV_READ); |
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311 | |
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312 | return true; |
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313 | } |
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314 | |
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315 | void |
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316 | client::inbuf_handle () |
|
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317 | { |
|
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318 | if (!handle_packet ()) |
|
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319 | return; |
|
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320 | |
|
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321 | while (handle_packet ()) |
|
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322 | ; |
|
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323 | |
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324 | flush (); |
|
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325 | } |
|
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326 | |
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327 | // callback called when socket is either readable or writable |
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328 | void |
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329 | client::socket_cb (iow &w, int revents) |
|
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330 | { |
|
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331 | //TODO remove when we have better socket cleanup logic |
|
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332 | if (destroyed ()) |
|
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333 | { |
|
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334 | socket_ev.poll (0); |
|
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335 | return; |
|
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336 | } |
|
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337 | |
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338 | if (revents & EV_WRITE) |
|
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339 | { |
|
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340 | write_outputbuffer (); |
|
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341 | |
|
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342 | if (!outputbuffer.len) |
|
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343 | socket_ev.poll (socket_ev.poll () & ~EV_WRITE); |
|
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344 | } |
|
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345 | |
|
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346 | if (revents & EV_READ) |
|
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347 | { |
|
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348 | int amount; |
|
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349 | uint8 *rbuf; |
|
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350 | |
|
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351 | if (ws_version) |
155 | } |
352 | { |
156 | } |
353 | if (ws_inbuf_len + 2048 > ws_inbuf_alloc) |
|
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354 | ws_inbuf = (uint8 *)realloc (ws_inbuf, ws_inbuf_alloc += 4096); |
157 | |
355 | |
158 | return *this; |
356 | rbuf = ws_inbuf; |
159 | } |
357 | amount = ws_inbuf_alloc - ws_inbuf_len; |
160 | |
|
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161 | packet &packet::operator <<(const data8 &v) |
|
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162 | { |
|
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163 | unsigned int len = min (v.len, 0x00FF); |
|
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164 | return *this << uint8 (len) << data (v.ptr, len); |
|
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165 | } |
|
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166 | |
|
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167 | packet &packet::operator <<(const data16 &v) |
|
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168 | { |
|
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169 | unsigned int len = min (v.len, 0xFFFF); |
|
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170 | return *this << uint16 (len) << data (v.ptr, len); |
|
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171 | } |
|
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172 | |
|
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173 | packet &packet::operator <<(const char *v) |
|
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174 | { |
|
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175 | return *this << data (v, strlen (v ? v : 0)); |
|
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176 | } |
|
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177 | |
|
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178 | void |
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179 | packet::printf (const char *format, ...) |
|
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180 | { |
|
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181 | int size = room (); |
|
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182 | |
|
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183 | va_list ap; |
|
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184 | va_start (ap, format); |
|
|
185 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
186 | va_end (ap); |
|
|
187 | |
|
|
188 | if (len >= size) |
|
|
189 | return reset (); |
|
|
190 | |
|
|
191 | cur += len; |
|
|
192 | } |
|
|
193 | |
|
|
194 | /****************************************************************************** |
|
|
195 | * |
|
|
196 | * Start of read routines. |
|
|
197 | * |
|
|
198 | ******************************************************************************/ |
|
|
199 | |
|
|
200 | int |
|
|
201 | client_socket::read_packet () |
|
|
202 | { |
|
|
203 | for (;;) |
|
|
204 | { |
|
|
205 | if (inbuf_len >= 2) |
|
|
206 | { |
358 | } |
207 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
359 | else |
208 | |
|
|
209 | if (inbuf_len >= 2 + pkt_len) |
|
|
210 | return pkt_len + 2; |
|
|
211 | } |
360 | { |
212 | |
361 | rbuf = inbuf; |
213 | int amount = sizeof (inbuf) - inbuf_len; |
362 | amount = sizeof (inbuf) - inbuf_len; |
214 | |
|
|
215 | if (amount <= 0) |
|
|
216 | { |
363 | } |
217 | LOG (llevError, "packet too large");//TODO |
|
|
218 | return -1; |
|
|
219 | } |
|
|
220 | |
|
|
221 | amount = read (fd, inbuf + inbuf_len, amount); |
|
|
222 | |
364 | |
223 | if (!amount) |
365 | if (!amount) |
224 | { |
366 | { |
225 | status = Ns_Dead; |
367 | // input buffer full |
|
|
368 | LOG (llevError, "input buffer overflow."); |
|
|
369 | destroy (); |
226 | return -1; |
370 | return; |
|
|
371 | } |
|
|
372 | |
|
|
373 | amount = read (fd, ws_inbuf + ws_inbuf_len, amount); |
|
|
374 | |
|
|
375 | if (!amount) |
|
|
376 | { |
|
|
377 | destroy (); |
|
|
378 | return; |
227 | } |
379 | } |
228 | else if (amount < 0) |
380 | else if (amount < 0) |
229 | { |
381 | { |
230 | if (errno != EAGAIN && errno != EINTR) |
382 | if (errno != EAGAIN && errno != EINTR) |
231 | { |
383 | { |
232 | LOG (llevError, "read error: %s\n", strerror (errno)); |
384 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
385 | destroy (); |
233 | return -1; |
386 | return; |
234 | } |
387 | } |
235 | |
388 | |
236 | return 0; |
389 | // should not be here, normally |
|
|
390 | } |
|
|
391 | |
|
|
392 | if (ws_version) |
237 | } |
393 | { |
|
|
394 | ws_inbuf_len += amount; |
238 | |
395 | |
|
|
396 | while (ws_inbuf_len) |
|
|
397 | { |
|
|
398 | if (ws_inbuf_len < 2 + 4) // 6 is minimum length: op, len, mask |
|
|
399 | break; |
|
|
400 | |
|
|
401 | int d = 2; |
|
|
402 | int fin = ws_inbuf [0] & 0x80; |
|
|
403 | int op = ws_inbuf [0] & 0x0f; |
|
|
404 | int len = ws_inbuf [1] & 0x7f; |
|
|
405 | |
|
|
406 | if (len == 126) |
|
|
407 | { |
|
|
408 | len = (ws_inbuf [2] << 8) | ws_inbuf [3]; |
|
|
409 | d += 2; |
|
|
410 | } |
|
|
411 | else if (len == 127) |
|
|
412 | { |
|
|
413 | if (ws_inbuf_len < 2 + 8) |
|
|
414 | return; |
|
|
415 | |
|
|
416 | // we don't do extra long frames, if a browser wants to send >2**32 bytes, |
|
|
417 | // there are bigger issues to fix. |
|
|
418 | len = (ws_inbuf [8] << 8) | ws_inbuf [9]; |
|
|
419 | d += 8; |
|
|
420 | } |
|
|
421 | |
|
|
422 | // we only continue if we have a complete frame |
|
|
423 | if (ws_inbuf_len < d + 4 + len) |
|
|
424 | return; |
|
|
425 | |
|
|
426 | switch (op) |
|
|
427 | { |
|
|
428 | case 0: op = ws_inbuf_type; break; // continuation |
|
|
429 | case 1: ws_inbuf_type = 1; break; // utf-8 |
|
|
430 | case 2: ws_inbuf_type = 2; break; // binary |
|
|
431 | } |
|
|
432 | |
|
|
433 | if (len > sizeof (inbuf) - inbuf_len) |
|
|
434 | { |
|
|
435 | // input buffer full |
|
|
436 | LOG (llevError, "input buffer overflow (ws)."); |
|
|
437 | destroy (); |
|
|
438 | return; |
|
|
439 | } |
|
|
440 | |
|
|
441 | uint8 *buf = inbuf + inbuf_len + 2; |
|
|
442 | |
|
|
443 | for (int i = 0; i < len; ++i) |
|
|
444 | buf [i] = ws_inbuf [d + 4 + i] ^ ws_inbuf [d + (i & 3)]; |
|
|
445 | |
|
|
446 | // remove frame |
|
|
447 | ws_inbuf_len -= d + 4 + len; |
|
|
448 | memmove (ws_inbuf, ws_inbuf + d + 4 + len, ws_inbuf_len); |
|
|
449 | |
|
|
450 | switch (op) |
|
|
451 | { |
|
|
452 | case 1: // utf-8 |
|
|
453 | // utf-8 encoded frames cannot have full length (MAXSOCKBUF) in all cases |
|
|
454 | // but we assume that these extra-long packets will be rare. |
|
|
455 | { |
|
|
456 | uint8 *a = buf; |
|
|
457 | uint8 *b = a; |
|
|
458 | uint8 *c = a + len; |
|
|
459 | |
|
|
460 | for (; a < c; ++a, ++b) |
|
|
461 | { |
|
|
462 | *b = *a; |
|
|
463 | |
|
|
464 | if (*a >= 0x80) |
|
|
465 | *b = (a [0] & 0x1f) << 6 | (a [1] & 0x3f), ++a; |
|
|
466 | } |
|
|
467 | |
|
|
468 | len -= a - b; |
|
|
469 | } |
|
|
470 | /* FALLTHROUGH */ |
|
|
471 | case 2: // binary |
|
|
472 | inbuf_len += len; |
|
|
473 | |
|
|
474 | if (fin) |
|
|
475 | { |
|
|
476 | inbuf [0] = inbuf_len >> 8; |
|
|
477 | inbuf [1] = inbuf_len; |
|
|
478 | |
|
|
479 | inbuf_len += 2; |
|
|
480 | |
|
|
481 | inbuf_handle (); |
|
|
482 | } |
|
|
483 | break; |
|
|
484 | |
|
|
485 | case 9: // ping |
|
|
486 | { |
|
|
487 | // send pong - we assume ping messages are <64k |
|
|
488 | // as we can't handle >10k at the moment anyway. |
|
|
489 | uint8 hdr [] = { 0x8a, 126, len >> 8, len }; |
|
|
490 | send (hdr, sizeof (hdr)); |
|
|
491 | send (inbuf + inbuf_len, len); |
|
|
492 | } |
|
|
493 | break; |
|
|
494 | |
|
|
495 | case 10: // pong |
|
|
496 | break; |
|
|
497 | |
|
|
498 | case 8: // close |
|
|
499 | default: |
|
|
500 | destroy (); |
|
|
501 | return; |
|
|
502 | } |
|
|
503 | } |
|
|
504 | } |
|
|
505 | else |
|
|
506 | { |
239 | inbuf_len += amount; |
507 | inbuf_len += amount; |
240 | |
508 | inbuf_handle (); |
241 | cst_tot.ibytes += amount; |
509 | } |
242 | cst_lst.ibytes += amount; |
|
|
243 | } |
510 | } |
244 | } |
|
|
245 | |
|
|
246 | void |
|
|
247 | client_socket::skip_packet (int len) |
|
|
248 | { |
|
|
249 | inbuf_len -= len; |
|
|
250 | memmove (inbuf, inbuf + len, inbuf_len); |
|
|
251 | } |
511 | } |
252 | |
512 | |
253 | /******************************************************************************* |
513 | /******************************************************************************* |
254 | * |
514 | * |
255 | * Start of write related routines. |
515 | * Start of write related routines. |
… | |
… | |
261 | * |
521 | * |
262 | * ns is the socket we are adding the data to, buf is the start of the |
522 | * ns is the socket we are adding the data to, buf is the start of the |
263 | * data, and len is the number of bytes to add. |
523 | * data, and len is the number of bytes to add. |
264 | */ |
524 | */ |
265 | void |
525 | void |
266 | client_socket::send (void *buf_, int len) |
526 | client::send (void *buf_, int len) |
267 | { |
527 | { |
268 | char *buf = (char *)buf_; |
528 | char *buf = (char *)buf_; |
269 | char *pos = buf; |
|
|
270 | int amt = 0; |
|
|
271 | |
529 | |
272 | if (status == Ns_Dead || !buf) |
530 | if (destroyed () || !buf) |
273 | { |
|
|
274 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
275 | return; |
531 | return; |
276 | } |
|
|
277 | |
532 | |
278 | if ((len + outputbuffer.len) > SOCKETBUFSIZE) |
533 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
279 | { |
534 | { |
280 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
535 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
281 | status = Ns_Dead; |
536 | // shutdown the socket, this is safer than destroying it immediately |
|
|
537 | // as lots of code in the callchain might still access the map etc. |
|
|
538 | shutdown (fd, SHUT_RDWR); |
282 | return; |
539 | return; |
283 | } |
540 | } |
284 | |
541 | |
285 | int avail, end; |
542 | int avail, end; |
286 | |
543 | |
… | |
… | |
304 | } |
561 | } |
305 | |
562 | |
306 | outputbuffer.len += len; |
563 | outputbuffer.len += len; |
307 | } |
564 | } |
308 | |
565 | |
309 | void |
|
|
310 | client_socket::socket_cb (iow &w, int got) |
|
|
311 | { |
|
|
312 | write_outputbuffer (); |
|
|
313 | |
|
|
314 | if (!outputbuffer.len) |
|
|
315 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
316 | } |
|
|
317 | |
|
|
318 | /** |
566 | /** |
319 | * Takes a string of data, and writes it out to the socket. A very handy |
567 | * Takes a string of data, and writes it out to the socket. A very handy |
320 | * shortcut function. |
568 | * shortcut function. |
321 | */ |
569 | */ |
322 | void |
570 | void |
323 | client_socket::send_packet (packet &sl) |
571 | client::send_packet (packet &sl) |
324 | { |
572 | { |
325 | if (status == Ns_Dead) |
573 | if (destroyed ()) |
326 | return; |
574 | return; |
327 | |
575 | |
328 | if (sl.length () >= MAXSOCKBUF) |
576 | if (sl.length () > MAXSOCKBUF) |
329 | { |
577 | { |
330 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
578 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
331 | /* Almost certainly we've overflowed a buffer, so quit now to make |
579 | /* Almost certainly we've overflowed a buffer, so quit now to make |
332 | * it easier to debug. |
580 | * it easier to debug. |
333 | */ |
581 | */ |
… | |
… | |
335 | } |
583 | } |
336 | |
584 | |
337 | if (!sl.length ()) |
585 | if (!sl.length ()) |
338 | return; |
586 | return; |
339 | |
587 | |
|
|
588 | if (ws_version == 8) |
|
|
589 | { |
|
|
590 | static uint8 buf [MAXSOCKBUF * 2 + 4]; |
|
|
591 | |
|
|
592 | uint8 *b = buf + 4; |
|
|
593 | for (uint8 *a = sl.buf_ + sl.hdrlen; a < sl.cur; ++a) |
|
|
594 | { |
|
|
595 | if (*a < 0x80) |
|
|
596 | *b++ = *a; |
|
|
597 | else |
|
|
598 | { |
|
|
599 | *b++ = 0xc0 | ((*a >> 6) & 0x1f); |
|
|
600 | *b++ = 0x80 | ( *a & 0x3f); |
|
|
601 | } |
|
|
602 | } |
|
|
603 | |
|
|
604 | assert (b - buf < sizeof (buf)); |
|
|
605 | |
|
|
606 | int len = b - (buf + 4); |
|
|
607 | |
|
|
608 | if (len < 126) |
|
|
609 | { |
|
|
610 | buf [2] = 0x81; |
|
|
611 | buf [3] = len; |
|
|
612 | |
|
|
613 | send (buf + 2, len + 2); |
|
|
614 | } |
|
|
615 | else |
|
|
616 | { |
|
|
617 | buf [0] = 0x81; |
|
|
618 | buf [1] = 126; |
|
|
619 | buf [2] = len >> 8; |
|
|
620 | buf [3] = len; |
|
|
621 | |
|
|
622 | send (buf, len + 4); |
|
|
623 | } |
|
|
624 | } |
|
|
625 | else if (ws_version == 13) |
|
|
626 | { |
|
|
627 | int len = sl.length (); |
|
|
628 | |
|
|
629 | if (len < 126) |
|
|
630 | { |
|
|
631 | uint8 hdr [] = { 0x82, len }; |
|
|
632 | send (hdr, sizeof (hdr)); |
|
|
633 | } |
|
|
634 | else |
|
|
635 | { |
|
|
636 | uint8 hdr [] = { 0x82, 126, len >> 8, len }; |
|
|
637 | send (hdr, sizeof (hdr)); |
|
|
638 | } |
|
|
639 | |
|
|
640 | send (sl.buf_ + sl.hdrlen, len); |
|
|
641 | } |
|
|
642 | else |
|
|
643 | { |
340 | assert (sl.hdrlen == 2); |
644 | assert (sl.hdrlen == 2); |
341 | |
645 | |
342 | sl.buf_ [0] = sl.length () >> 8; |
646 | sl.buf_ [0] = sl.length () >> 8; |
343 | sl.buf_ [1] = sl.length () ; |
647 | sl.buf_ [1] = sl.length () ; |
344 | |
648 | |
345 | send (sl.buf_, sl.length () + sl.hdrlen); |
649 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
650 | } |
346 | } |
651 | } |
347 | |
652 | |
348 | void |
653 | void |
349 | client_socket::send_packet (const char *buf, int len) |
654 | client::send_packet (const char *buf, int len) |
350 | { |
655 | { |
351 | packet sl; |
656 | packet sl; |
352 | |
657 | |
353 | sl << data (buf, len); |
658 | sl << data (buf, len); |
354 | send_packet (sl); |
659 | send_packet (sl); |
355 | } |
660 | } |
356 | |
661 | |
357 | void |
662 | void |
358 | client_socket::send_packet (const char *buf) |
663 | client::send_packet (const char *buf) |
359 | { |
664 | { |
360 | send_packet (buf, strlen (buf)); |
665 | send_packet (buf, strlen (buf)); |
361 | } |
666 | } |
362 | |
667 | |
|
|
668 | void |
|
|
669 | client::send_packet_printf (const char *format, ...) |
|
|
670 | { |
|
|
671 | packet sl; |
|
|
672 | |
|
|
673 | va_list ap; |
|
|
674 | va_start (ap, format); |
|
|
675 | sl.vprintf (format, ap); |
|
|
676 | va_end (ap); |
|
|
677 | |
|
|
678 | send_packet (sl); |
|
|
679 | } |
|
|
680 | |
|
|
681 | void |
|
|
682 | client::send_msg (int color, const char *type, const char *msg) |
|
|
683 | { |
|
|
684 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
685 | { |
|
|
686 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
687 | return; |
|
|
688 | } |
|
|
689 | |
|
|
690 | int len = strlen (msg); |
|
|
691 | |
|
|
692 | if (!(color & NDI_VERBATIM) |
|
|
693 | && (msg_is_special (msg) |
|
|
694 | || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128))) |
|
|
695 | cfperl_send_msg (this, color, type, msg); |
|
|
696 | else |
|
|
697 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
698 | } |
|
|
699 | |
|
|
700 | void |
|
|
701 | client::send_drawinfo (const char *msg, int flags) |
|
|
702 | { |
|
|
703 | send_msg (flags, "log", msg); |
|
|
704 | } |
|
|
705 | |
363 | /****************************************************************************** |
706 | /*********************************************************************** |
364 | * |
707 | * |
365 | * statistics logging functions. |
708 | * packet functions/utilities |
366 | * |
709 | * |
367 | ******************************************************************************/ |
710 | **********************************************************************/ |
368 | |
711 | |
369 | #ifdef CS_LOGSTATS |
712 | packet::packet (const char *name) |
370 | |
|
|
371 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
372 | * stats |
|
|
373 | */ |
|
|
374 | CS_Stats cst_tot, cst_lst; |
|
|
375 | |
|
|
376 | /** |
|
|
377 | * Writes out the gathered stats. We clear cst_lst. |
|
|
378 | */ |
|
|
379 | void |
|
|
380 | write_cs_stats (void) |
|
|
381 | { |
713 | { |
382 | time_t now = time (NULL); |
714 | reset (); |
383 | |
715 | |
384 | /* If no connections recently, don't both to log anything */ |
716 | int len = strlen (name); |
385 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
717 | memcpy (cur, name, len); cur += len; |
386 | return; |
718 | *cur++ = ' '; |
387 | |
|
|
388 | /* CSSTAT is put in so scripts can easily find the line */ |
|
|
389 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
390 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
391 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
392 | cst_lst.ibytes = 0; |
|
|
393 | cst_lst.obytes = 0; |
|
|
394 | cst_lst.time_start = now; |
|
|
395 | } |
719 | } |
396 | #endif |
|
|
397 | |
720 | |
|
|
721 | packet &packet::operator <<(const ber32 v) |
|
|
722 | { |
|
|
723 | enum { maxlen = 32 / 7 + 1 }; |
|
|
724 | uint8 buf[maxlen]; |
|
|
725 | uint8 *p = buf + maxlen; |
|
|
726 | uint32 val = v.val; |
|
|
727 | |
|
|
728 | *--p = val & 0x7F; |
|
|
729 | |
|
|
730 | while (val > 0x7F) |
|
|
731 | { |
|
|
732 | val >>= 7; |
|
|
733 | *--p = (val & 0x7F) | 0x80; |
|
|
734 | } |
|
|
735 | |
|
|
736 | return *this << data (p, buf + maxlen - p); |
|
|
737 | } |
|
|
738 | |
|
|
739 | packet &packet::operator <<(const data &v) |
|
|
740 | { |
|
|
741 | if (room () < v.len) |
|
|
742 | reset (); |
|
|
743 | else |
|
|
744 | { |
|
|
745 | if (v.len) |
|
|
746 | { |
|
|
747 | memcpy (cur, v.ptr, v.len); |
|
|
748 | cur += v.len; |
|
|
749 | } |
|
|
750 | } |
|
|
751 | |
|
|
752 | return *this; |
|
|
753 | } |
|
|
754 | |
|
|
755 | packet &packet::operator <<(const data8 &v) |
|
|
756 | { |
|
|
757 | unsigned int len = min (v.len, 0x00FF); |
|
|
758 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
759 | } |
|
|
760 | |
|
|
761 | packet &packet::operator <<(const data16 &v) |
|
|
762 | { |
|
|
763 | unsigned int len = min (v.len, 0xFFFF); |
|
|
764 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
765 | } |
|
|
766 | |
|
|
767 | packet &packet::operator <<(const char *v) |
|
|
768 | { |
|
|
769 | return *this << data (v, strlen (v ? v : 0)); |
|
|
770 | } |
|
|
771 | |
|
|
772 | void |
|
|
773 | packet::vprintf (const char *format, va_list ap) |
|
|
774 | { |
|
|
775 | int size = room (); |
|
|
776 | |
|
|
777 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
778 | |
|
|
779 | if (len >= size) |
|
|
780 | return reset (); |
|
|
781 | |
|
|
782 | cur += len; |
|
|
783 | } |
|
|
784 | |