1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * CrossFire, A Multiplayer game for X-windows |
3 | |
3 | * |
|
|
4 | * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (C) 1992 Frank Tore Johansen |
5 | |
6 | * |
6 | This program is free software; you can redistribute it and/or modify |
7 | * This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
8 | * it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | * the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. |
10 | * (at your option) any later version. |
10 | |
11 | * |
11 | This program is distributed in the hope that it will be useful, |
12 | * This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
15 | * GNU General Public License for more details. |
15 | |
16 | * |
16 | You should have received a copy of the GNU General Public License |
17 | * You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software |
18 | * along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | |
20 | * |
20 | The author can be reached via e-mail to mark@pyramid.com |
21 | * The author can be reached via e-mail to mark@pyramid.com |
21 | */ |
22 | */ |
22 | |
23 | |
23 | /** |
24 | /** |
24 | * \file |
25 | * \file |
25 | * Low-level socket-related functions. |
26 | * Low-level socket-related functions. |
26 | * |
27 | * |
27 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
… | |
… | |
33 | */ |
34 | */ |
34 | |
35 | |
35 | using namespace std; |
36 | using namespace std; |
36 | |
37 | |
37 | #include <global.h> |
38 | #include <global.h> |
38 | #include <newclient.h> |
|
|
39 | #include <sproto.h> |
39 | #include <sproto.h> |
40 | #include <cstdarg> |
40 | #include <cstdarg> |
41 | |
41 | |
42 | #ifdef __linux__ |
42 | #ifdef __linux__ |
43 | # include <sys/types.h> |
43 | # include <sys/types.h> |
44 | # include <sys/socket.h> |
44 | # include <sys/socket.h> |
45 | # include <netinet/in.h> |
45 | # include <netinet/in.h> |
46 | # define TCP_HZ 1000 // sorry... |
|
|
47 | # include <netinet/tcp.h> |
46 | # include <netinet/tcp.h> |
48 | #endif |
47 | #endif |
49 | |
48 | |
50 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
51 | // easily die in 20 seconds... |
50 | // easily die in 20 seconds... |
52 | #define SOCKET_TIMEOUT1 10 |
51 | #define SOCKET_TIMEOUT1 10 * 1000 |
53 | #define SOCKET_TIMEOUT2 20 |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
54 | |
53 | |
55 | void |
54 | void |
56 | Socket_Flush (client_socket * ns) |
55 | client::flush () |
57 | { |
56 | { |
|
|
57 | if (destroyed ()) |
|
|
58 | return; |
|
|
59 | |
58 | #ifdef __linux__ |
60 | #ifdef __linux__ |
59 | // check time of last ack, and, if too old, kill connection |
61 | // check time of last ack, and, if too old, kill connection |
60 | struct tcp_info tcpi; |
62 | struct tcp_info tcpi; |
61 | socklen_t len = sizeof (tcpi); |
63 | socklen_t len = sizeof (tcpi); |
62 | |
64 | |
63 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
65 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
64 | { |
66 | { |
65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
67 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
66 | |
68 | |
|
|
69 | rtt = tcpi.tcpi_rtt; |
|
|
70 | rttvar = tcpi.tcpi_rttvar; |
|
|
71 | |
67 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
72 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 < diff && diff < 0x80000000UL // ack delayed for 20s |
68 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
73 | && SOCKET_TIMEOUT2 < tcpi.tcpi_last_data_sent) // no data sent for 10s |
69 | { |
74 | { |
70 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
71 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
76 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
72 | ns->status = Ns_Dead; |
77 | destroy (); |
73 | } |
78 | } |
74 | } |
79 | } |
75 | |
|
|
76 | int val; |
|
|
77 | |
|
|
78 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
|
|
79 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
|
|
80 | #endif |
80 | #endif |
81 | } |
|
|
82 | |
81 | |
|
|
82 | /** |
|
|
83 | * Writes data to socket. |
|
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84 | * |
|
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85 | * When the socket is clear to write, and we have backlogged data, this |
|
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86 | * is called to write it out. |
|
|
87 | */ |
|
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88 | |
|
|
89 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
|
|
90 | return; |
|
|
91 | |
|
|
92 | write_outputbuffer (); |
|
|
93 | } |
|
|
94 | |
|
|
95 | void |
|
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96 | client::write_outputbuffer () |
|
|
97 | { |
|
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98 | while (outputbuffer.len) |
|
|
99 | { |
|
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100 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
|
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101 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
|
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102 | |
|
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103 | if (res > 0) |
|
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104 | { |
|
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105 | outputbuffer.start += res; |
|
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106 | /* wrap back to start of buffer */ |
|
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107 | if (outputbuffer.start == SOCKETBUFSIZE) |
|
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108 | outputbuffer.start = 0; |
|
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109 | |
|
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110 | 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 |
|
|
115 | } |
|
|
116 | else if (res == 0) |
|
|
117 | { |
|
|
118 | LOG (llevError, "socket write failed, connection closed.\n"); |
|
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119 | destroy (); |
|
|
120 | return; |
|
|
121 | } |
|
|
122 | else if (errno == EINTR) |
|
|
123 | { |
|
|
124 | // just retry |
|
|
125 | } |
|
|
126 | else if (errno == EAGAIN) |
|
|
127 | { |
|
|
128 | // delay till ready |
|
|
129 | socket_ev.poll (socket_ev.poll () | PE_W); |
|
|
130 | socket_ev.start (); |
|
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131 | return; |
|
|
132 | } |
|
|
133 | else |
|
|
134 | { |
|
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135 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
|
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136 | destroy (); |
|
|
137 | return; |
|
|
138 | } |
|
|
139 | } |
|
|
140 | |
|
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141 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
142 | } |
|
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143 | |
|
|
144 | /****************************************************************************** |
|
|
145 | * |
|
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146 | * Start of read routines. |
|
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147 | * |
|
|
148 | ******************************************************************************/ |
|
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149 | |
|
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150 | int |
|
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151 | client::next_packet () |
|
|
152 | { |
|
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153 | if (inbuf_len >= 2) |
|
|
154 | { |
|
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155 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
|
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156 | |
|
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157 | if (inbuf_len >= 2 + pkt_len) |
|
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158 | return 2 + pkt_len; |
|
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159 | |
|
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160 | if (inbuf_len == sizeof (inbuf)) |
|
|
161 | { |
|
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162 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED); |
|
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163 | destroy (); |
|
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164 | return -1; |
|
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165 | } |
|
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166 | } |
|
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167 | |
|
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168 | return 0; |
|
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169 | } |
|
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170 | |
|
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171 | void |
|
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172 | client::skip_packet (int len) |
|
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173 | { |
|
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174 | inbuf_len -= len; |
|
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175 | memmove (inbuf, inbuf + len, inbuf_len); |
|
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176 | } |
|
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177 | |
83 | /*********************************************************************** |
178 | /***************************************************************************** |
84 | * |
179 | * Start of command dispatch area. |
85 | * packet functions/utilities |
180 | * The commands here are protocol commands. |
86 | * |
|
|
87 | **********************************************************************/ |
181 | ****************************************************************************/ |
88 | |
182 | |
89 | packet &packet::operator <<(const data &v) |
183 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
|
|
184 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
|
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185 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
|
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186 | |
|
|
187 | /** |
|
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188 | * Dispatch table for the server. |
|
|
189 | */ |
|
|
190 | static struct packet_type packets[] = { |
|
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191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
|
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192 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
|
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193 | |
|
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194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
|
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195 | {"ex", PC(ExCmd) PF_PLAYING }, |
|
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196 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
|
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197 | {"lookat", PC(LookAt) PF_PLAYING }, |
|
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198 | {"lock", PC(LockItem) PF_PLAYING }, |
|
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199 | {"mark", PC(MarkItem) PF_PLAYING }, |
|
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200 | {"move", PC(MoveCmd) PF_PLAYING }, |
|
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201 | {"ext", PC(ExtCmd) 0 }, // CF+ |
|
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202 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
|
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203 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
|
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204 | |
|
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205 | {"reply", SC(ReplyCmd) 0 }, |
|
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206 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
|
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207 | {"addme", SC(AddMeCmd) 0 }, |
|
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208 | {"askface", SC(AskFaceCmd) 0 }, |
|
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209 | {"requestinfo", SC(RequestInfo) 0 }, |
|
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210 | {"setfacemode", SC(SetFaceMode) 0 }, |
|
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211 | {"setsound", SC(SetSound) 0 }, |
|
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212 | {"setup", SC(SetUp) 0 }, |
|
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213 | {"version", SC(VersionCmd) 0 }, |
|
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214 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
|
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215 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
|
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216 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
|
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217 | }; |
|
|
218 | |
|
|
219 | bool |
|
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220 | client::may_execute (const packet_type *pkt) const |
90 | { |
221 | { |
91 | if (room () < v.len) |
222 | return (!(pkt->flags & PF_PLAYER) || pl) |
92 | reset (); |
223 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
|
|
224 | } |
|
|
225 | |
|
|
226 | // HACK: some commands currently should be executed |
|
|
227 | // even when the player is frozen. this hack detects |
|
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228 | // those commands. it should be folded into may_execute, |
|
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229 | // but kept seperate to emphasise the hack aspect, i.e. |
|
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230 | // do it better, then remove. |
|
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231 | static bool |
|
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232 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
|
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233 | { |
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234 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
|
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235 | return false; |
|
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236 | |
|
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237 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
|
|
238 | return false; |
|
|
239 | |
|
|
240 | if (pkt->flags & PF_COMMAND6) |
|
|
241 | { |
|
|
242 | data += 6; |
|
|
243 | len -= 6; |
|
|
244 | } |
|
|
245 | |
|
|
246 | if (len > 4 && !strncmp (data, "say " , 4)) |
|
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247 | return true; |
|
|
248 | if (len > 5 && !strncmp (data, "chat ", 5)) |
|
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249 | return true; |
|
|
250 | |
|
|
251 | return false; |
|
|
252 | } |
|
|
253 | |
|
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254 | void |
|
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255 | client::execute (const packet_type *pkt, char *data, int datalen) |
|
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256 | { |
|
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257 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
|
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258 | { |
|
|
259 | //TODO: only one format |
|
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260 | if (pkt->flags & PF_PLAYER) |
|
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261 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
|
|
262 | else |
|
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263 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
|
|
264 | } |
93 | else |
265 | else |
|
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266 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED, pkt->name); |
|
|
267 | } |
|
|
268 | |
|
|
269 | bool |
|
|
270 | client::handle_packet () |
|
|
271 | { |
|
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272 | int pkt_len = next_packet (); |
|
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273 | |
|
|
274 | if (!pkt_len) |
|
|
275 | return false; |
|
|
276 | else if (pkt_len < 0) |
|
|
277 | { |
|
|
278 | LOG (llevError, "read error on player %s\n", |
|
|
279 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
|
|
280 | destroy (); |
|
|
281 | return false; |
94 | { |
282 | } |
95 | if (v.len) |
283 | |
|
|
284 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
|
|
285 | |
|
|
286 | /* First, break out beginning word. There are at least |
|
|
287 | * a few commands that do not have any paremeters. If |
|
|
288 | * we get such a command, don't worry about trying |
|
|
289 | * to break it up. |
|
|
290 | */ |
|
|
291 | int datalen; |
|
|
292 | char *data = strchr ((char *)inbuf + 2, ' '); |
|
|
293 | |
|
|
294 | if (data) |
|
|
295 | { |
|
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296 | *data++ = 0; |
|
|
297 | datalen = pkt_len - (data - (char *)inbuf); |
|
|
298 | } |
|
|
299 | else |
|
|
300 | { |
|
|
301 | data = (char *)inbuf + 2; // better read garbage than segfault |
|
|
302 | datalen = 0; |
|
|
303 | } |
|
|
304 | |
|
|
305 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
|
|
306 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
96 | { |
307 | { |
97 | memcpy (cur, v.ptr, v.len); |
308 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
98 | cur += v.len; |
309 | queue_command (pkt, data, datalen); |
|
|
310 | else |
|
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311 | execute (pkt, data, datalen); |
|
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312 | |
|
|
313 | goto next_packet; |
99 | } |
314 | } |
|
|
315 | |
|
|
316 | // If we get here, we didn't find a valid command. |
|
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317 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED, (char *)inbuf + 2); |
|
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318 | next_packet: |
|
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319 | skip_packet (pkt_len); |
|
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320 | |
|
|
321 | // input buffer has space again |
|
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322 | socket_ev.poll (socket_ev.poll () | PE_R); |
|
|
323 | |
|
|
324 | return true; |
|
|
325 | } |
|
|
326 | |
|
|
327 | // callback called when socket is either readable or writable |
|
|
328 | void |
|
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329 | client::socket_cb (iow &w, int got) |
|
|
330 | { |
|
|
331 | //TODO remove when we have better socket cleanup logic |
|
|
332 | if (destroyed ()) |
100 | } |
333 | { |
101 | |
334 | socket_ev.poll (0); |
102 | return *this; |
335 | return; |
103 | } |
|
|
104 | |
|
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105 | packet &packet::operator <<(const data8 &v) |
|
|
106 | { |
|
|
107 | unsigned int len = min (v.len, 0x00FF); |
|
|
108 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
109 | } |
|
|
110 | |
|
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111 | packet &packet::operator <<(const data16 &v) |
|
|
112 | { |
|
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113 | unsigned int len = min (v.len, 0xFFFF); |
|
|
114 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
115 | } |
|
|
116 | |
|
|
117 | packet &packet::operator <<(const char *v) |
|
|
118 | { |
|
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119 | return *this << data (v, strlen (v ? v : 0)); |
|
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120 | } |
|
|
121 | |
|
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122 | void |
|
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123 | packet::printf (const char *format, ...) |
|
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124 | { |
|
|
125 | int size = room (); |
|
|
126 | |
|
|
127 | va_list ap; |
|
|
128 | va_start (ap, format); |
|
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129 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
130 | va_end (ap); |
|
|
131 | |
|
|
132 | if (len >= size) |
|
|
133 | return reset (); |
|
|
134 | |
|
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135 | cur += len; |
|
|
136 | } |
|
|
137 | |
|
|
138 | /****************************************************************************** |
|
|
139 | * |
|
|
140 | * Start of read routines. |
|
|
141 | * |
|
|
142 | ******************************************************************************/ |
|
|
143 | |
|
|
144 | int |
|
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145 | client_socket::read_packet () |
|
|
146 | { |
|
|
147 | for (;;) |
|
|
148 | { |
336 | } |
149 | if (inbuf_len >= 2) |
|
|
150 | { |
|
|
151 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
|
|
152 | |
337 | |
153 | if (inbuf_len >= 2 + pkt_len) |
338 | if (got & PE_W) |
154 | return pkt_len + 2; |
339 | { |
155 | } |
340 | write_outputbuffer (); |
|
|
341 | |
|
|
342 | if (!outputbuffer.len) |
|
|
343 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
344 | } |
|
|
345 | |
|
|
346 | if (got & PE_R) |
|
|
347 | { |
|
|
348 | //TODO: rate-limit tcp connection in better ways, important |
156 | |
349 | |
157 | int amount = sizeof (inbuf) - inbuf_len; |
350 | int amount = sizeof (inbuf) - inbuf_len; |
158 | |
351 | |
159 | if (amount <= 0) |
352 | if (!amount) |
160 | { |
353 | { |
161 | LOG (llevError, "packet too large");//TODO |
354 | // input buffer full |
|
|
355 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
162 | return -1; |
356 | return; |
163 | } |
357 | } |
164 | |
358 | |
165 | amount = read (fd, inbuf + inbuf_len, amount); |
359 | amount = read (fd, inbuf + inbuf_len, amount); |
166 | |
360 | |
167 | if (!amount) |
361 | if (!amount) |
168 | { |
362 | { |
169 | status = Ns_Dead; |
363 | destroy (); |
170 | return -1; |
364 | return; |
171 | } |
365 | } |
172 | else if (amount < 0) |
366 | else if (amount < 0) |
173 | { |
367 | { |
174 | if (errno != EAGAIN && errno != EINTR) |
368 | if (errno != EAGAIN && errno != EINTR) |
175 | { |
369 | { |
176 | LOG (llevError, "read error: %s", strerror (errno)); |
370 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
371 | destroy (); |
177 | return -1; |
372 | return; |
178 | } |
373 | } |
179 | |
374 | |
180 | return 0; |
375 | // should not be here, normally |
|
|
376 | } |
|
|
377 | else |
181 | } |
378 | { |
182 | |
|
|
183 | inbuf_len += amount; |
379 | inbuf_len += amount; |
184 | |
380 | |
185 | cst_tot.ibytes += amount; |
381 | cst_tot.ibytes += amount; |
186 | cst_lst.ibytes += amount; |
382 | cst_lst.ibytes += amount; |
187 | } |
|
|
188 | } |
|
|
189 | |
383 | |
|
|
384 | cmd_ev.start (); |
|
|
385 | } |
|
|
386 | } |
|
|
387 | } |
|
|
388 | |
|
|
389 | // called whenever we have additional commands to process |
190 | void |
390 | void |
191 | client_socket::skip_packet (int len) |
391 | client::cmd_cb (iw &w) |
192 | { |
392 | { |
193 | inbuf_len -= len; |
393 | if (handle_packet ()) |
194 | memmove (inbuf, inbuf + len, inbuf_len); |
394 | w.start (); |
|
|
395 | else |
|
|
396 | flush (); |
195 | } |
397 | } |
196 | |
398 | |
197 | /******************************************************************************* |
399 | /******************************************************************************* |
198 | * |
400 | * |
199 | * Start of write related routines. |
401 | * Start of write related routines. |
… | |
… | |
204 | * Adds data to a socket buffer for whatever reason. |
406 | * Adds data to a socket buffer for whatever reason. |
205 | * |
407 | * |
206 | * ns is the socket we are adding the data to, buf is the start of the |
408 | * ns is the socket we are adding the data to, buf is the start of the |
207 | * data, and len is the number of bytes to add. |
409 | * data, and len is the number of bytes to add. |
208 | */ |
410 | */ |
209 | |
411 | void |
210 | static void |
412 | client::send (void *buf_, int len) |
211 | add_to_buffer (client_socket *ns, char *buf, int len) |
|
|
212 | { |
413 | { |
|
|
414 | char *buf = (char *)buf_; |
|
|
415 | |
|
|
416 | if (destroyed () || !buf) |
|
|
417 | return; |
|
|
418 | |
|
|
419 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
|
|
420 | { |
|
|
421 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
|
|
422 | // shutdown the socket, this is safer than destroying it immediately |
|
|
423 | // as lots of code in the callchain might still access the map etc. |
|
|
424 | shutdown (fd, SHUT_RDWR); |
|
|
425 | return; |
|
|
426 | } |
|
|
427 | |
213 | int avail, end; |
428 | int avail, end; |
214 | |
|
|
215 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
|
|
216 | { |
|
|
217 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
|
|
218 | ns->status = Ns_Dead; |
|
|
219 | return; |
|
|
220 | } |
|
|
221 | |
429 | |
222 | /* data + end is where we start putting the new data. The last byte |
430 | /* data + end is where we start putting the new data. The last byte |
223 | * currently in use is actually data + end -1 |
431 | * currently in use is actually data + end -1 |
224 | */ |
432 | */ |
225 | |
|
|
226 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
433 | end = outputbuffer.start + outputbuffer.len; |
227 | /* The buffer is already in a wrapped state, so adjust end */ |
434 | /* The buffer is already in a wrapped state, so adjust end */ |
228 | if (end >= SOCKETBUFSIZE) |
435 | if (end >= SOCKETBUFSIZE) |
229 | end -= SOCKETBUFSIZE; |
436 | end -= SOCKETBUFSIZE; |
230 | |
437 | |
231 | avail = SOCKETBUFSIZE - end; |
438 | avail = SOCKETBUFSIZE - end; |
232 | |
439 | |
233 | /* We can all fit it behind the current data without wrapping */ |
440 | /* We can all fit it behind the current data without wrapping */ |
234 | if (avail >= len) |
441 | if (avail >= len) |
235 | memcpy (ns->outputbuffer.data + end, buf, len); |
442 | memcpy (outputbuffer.data + end, buf, len); |
236 | else |
443 | else |
237 | { |
444 | { |
238 | memcpy (ns->outputbuffer.data + end, buf, avail); |
445 | memcpy (outputbuffer.data + end, buf, avail); |
239 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
446 | memcpy (outputbuffer.data, buf + avail, len - avail); |
240 | } |
447 | } |
241 | |
448 | |
242 | ns->outputbuffer.len += len; |
449 | outputbuffer.len += len; |
243 | #if 0 |
|
|
244 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
|
|
245 | #endif |
|
|
246 | } |
|
|
247 | |
|
|
248 | /** |
|
|
249 | * Writes data to socket. |
|
|
250 | * |
|
|
251 | * When the socket is clear to write, and we have backlogged data, this |
|
|
252 | * is called to write it out. |
|
|
253 | */ |
|
|
254 | void |
|
|
255 | write_socket_buffer (client_socket * ns) |
|
|
256 | { |
|
|
257 | int amt, max; |
|
|
258 | |
|
|
259 | if (ns->outputbuffer.len == 0) |
|
|
260 | { |
|
|
261 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
|
|
262 | return; |
|
|
263 | } |
|
|
264 | |
|
|
265 | do |
|
|
266 | { |
|
|
267 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
|
|
268 | if (ns->outputbuffer.len < max) |
|
|
269 | max = ns->outputbuffer.len; |
|
|
270 | |
|
|
271 | do |
|
|
272 | { |
|
|
273 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
274 | } |
|
|
275 | while ((amt < 0) && (errno == EINTR)); |
|
|
276 | |
|
|
277 | if (amt < 0) |
|
|
278 | { /* We got an error */ |
|
|
279 | |
|
|
280 | if (errno != EWOULDBLOCK) |
|
|
281 | { |
|
|
282 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
|
|
283 | ns->status = Ns_Dead; |
|
|
284 | return; |
|
|
285 | } |
|
|
286 | else |
|
|
287 | { /* EWOULDBLOCK */ |
|
|
288 | /* can't write it, so store it away. */ |
|
|
289 | ns->can_write = 0; |
|
|
290 | return; |
|
|
291 | } |
|
|
292 | } |
|
|
293 | ns->outputbuffer.start += amt; |
|
|
294 | /* wrap back to start of buffer */ |
|
|
295 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
296 | ns->outputbuffer.start = 0; |
|
|
297 | ns->outputbuffer.len -= amt; |
|
|
298 | #ifdef CS_LOGSTATS |
|
|
299 | cst_tot.obytes += amt; |
|
|
300 | cst_lst.obytes += amt; |
|
|
301 | #endif |
|
|
302 | } |
|
|
303 | while (ns->outputbuffer.len > 0); |
|
|
304 | } |
|
|
305 | |
|
|
306 | /** |
|
|
307 | * This writes data to the socket. - It is very low level - |
|
|
308 | * all we try and do is write out the data to the socket |
|
|
309 | * provided (ns). buf is the data to write, len is the number |
|
|
310 | * of bytes to write. IT doesn't return anything - rather, it |
|
|
311 | * updates the ns structure if we get an error. |
|
|
312 | */ |
|
|
313 | void |
|
|
314 | client_socket::send (void *buf_, int len) |
|
|
315 | { |
|
|
316 | char *buf = (char *)buf_; |
|
|
317 | char *pos = buf; |
|
|
318 | int amt = 0; |
|
|
319 | |
|
|
320 | if (status == Ns_Dead || !buf) |
|
|
321 | { |
|
|
322 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
323 | return; |
|
|
324 | } |
|
|
325 | |
|
|
326 | #ifndef __GNU__ /* This caused problems on Hurd */ |
|
|
327 | if (!can_write) |
|
|
328 | { |
|
|
329 | add_to_buffer (this, buf, len); |
|
|
330 | return; |
|
|
331 | } |
|
|
332 | #endif |
|
|
333 | |
|
|
334 | /* If we manage to write more than we wanted, take it as a bonus */ |
|
|
335 | while (len > 0) |
|
|
336 | { |
|
|
337 | do |
|
|
338 | { |
|
|
339 | amt = write (fd, pos, len); |
|
|
340 | } |
|
|
341 | while ((amt < 0) && (errno == EINTR)); |
|
|
342 | |
|
|
343 | if (amt < 0) |
|
|
344 | { /* We got an error */ |
|
|
345 | if (errno != EWOULDBLOCK) |
|
|
346 | { |
|
|
347 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
|
|
348 | errno, strerror (errno)); |
|
|
349 | status = Ns_Dead; |
|
|
350 | return; |
|
|
351 | } |
|
|
352 | else |
|
|
353 | { /* EWOULDBLOCK */ |
|
|
354 | /* can't write it, so store it away. */ |
|
|
355 | add_to_buffer (this, pos, len); |
|
|
356 | can_write = 0; |
|
|
357 | return; |
|
|
358 | } |
|
|
359 | } |
|
|
360 | /* amt gets set to 0 above in blocking code, so we do this as |
|
|
361 | * an else if to make sure we don't reprocess it. |
|
|
362 | */ |
|
|
363 | else if (amt == 0) |
|
|
364 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
|
|
365 | |
|
|
366 | len -= amt; |
|
|
367 | pos += amt; |
|
|
368 | #ifdef CS_LOGSTATS |
|
|
369 | cst_tot.obytes += amt; |
|
|
370 | cst_lst.obytes += amt; |
|
|
371 | #endif |
|
|
372 | } |
|
|
373 | } |
450 | } |
374 | |
451 | |
375 | /** |
452 | /** |
376 | * Takes a string of data, and writes it out to the socket. A very handy |
453 | * Takes a string of data, and writes it out to the socket. A very handy |
377 | * shortcut function. |
454 | * shortcut function. |
378 | */ |
455 | */ |
379 | |
|
|
380 | void |
456 | void |
381 | client_socket::send_packet (packet &sl) |
457 | client::send_packet (packet &sl) |
382 | { |
458 | { |
383 | Send_With_Handling (this, &sl); |
459 | if (destroyed ()) |
384 | } |
|
|
385 | |
|
|
386 | void |
|
|
387 | client_socket::send_packet (const char *buf, int len) |
|
|
388 | { |
|
|
389 | packet sl; |
|
|
390 | |
|
|
391 | sl << data (buf, len); |
|
|
392 | send_packet (sl); |
|
|
393 | } |
|
|
394 | |
|
|
395 | void |
|
|
396 | client_socket::send_packet (const char *buf) |
|
|
397 | { |
|
|
398 | send_packet (buf, strlen (buf)); |
|
|
399 | } |
|
|
400 | |
|
|
401 | /** |
|
|
402 | * Calls Write_To_Socket to send data to the client. |
|
|
403 | * |
|
|
404 | * The only difference in this function is that we take a packet |
|
|
405 | *, and we prepend the length information. |
|
|
406 | */ |
|
|
407 | void |
|
|
408 | Send_With_Handling (client_socket *ns, packet *msg) |
|
|
409 | { |
|
|
410 | unsigned char sbuf[4]; |
|
|
411 | |
|
|
412 | if (ns->status == Ns_Dead || !msg) |
|
|
413 | return; |
460 | return; |
414 | |
461 | |
415 | if (msg->length () >= MAXSOCKBUF) |
462 | if (sl.length () >= MAXSOCKBUF) |
416 | { |
463 | { |
417 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->length ()); |
464 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
418 | /* Almost certainly we've overflowed a buffer, so quite now to make |
465 | /* Almost certainly we've overflowed a buffer, so quit now to make |
419 | * it easier to debug. |
466 | * it easier to debug. |
420 | */ |
467 | */ |
421 | abort (); |
468 | abort (); |
422 | } |
469 | } |
423 | |
470 | |
424 | sbuf[0] = ((uint32) (msg->length ()) >> 8); |
471 | if (!sl.length ()) |
425 | sbuf[1] = ((uint32) (msg->length ()) ); |
472 | return; |
426 | |
473 | |
427 | if (ns->status != Ns_Old) |
474 | assert (sl.hdrlen == 2); |
428 | ns->send (sbuf, 2); |
|
|
429 | |
475 | |
430 | ns->send (msg->buf, msg->length ()); |
476 | sl.buf_ [0] = sl.length () >> 8; |
|
|
477 | sl.buf_ [1] = sl.length () ; |
|
|
478 | |
|
|
479 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
480 | } |
|
|
481 | |
|
|
482 | void |
|
|
483 | client::send_packet (const char *buf, int len) |
|
|
484 | { |
|
|
485 | packet sl; |
|
|
486 | |
|
|
487 | sl << data (buf, len); |
|
|
488 | send_packet (sl); |
|
|
489 | } |
|
|
490 | |
|
|
491 | void |
|
|
492 | client::send_packet (const char *buf) |
|
|
493 | { |
|
|
494 | send_packet (buf, strlen (buf)); |
|
|
495 | } |
|
|
496 | |
|
|
497 | void |
|
|
498 | client::send_packet_printf (const char *format, ...) |
|
|
499 | { |
|
|
500 | packet sl; |
|
|
501 | |
|
|
502 | va_list ap; |
|
|
503 | va_start (ap, format); |
|
|
504 | sl.vprintf (format, ap); |
|
|
505 | va_end (ap); |
|
|
506 | |
|
|
507 | send_packet (sl); |
|
|
508 | } |
|
|
509 | |
|
|
510 | void |
|
|
511 | client::send_drawinfo (const char *msg, int flags) |
|
|
512 | { |
|
|
513 | send_packet_printf ("drawinfo %d %s", flags, msg); |
|
|
514 | } |
|
|
515 | |
|
|
516 | /*********************************************************************** |
|
|
517 | * |
|
|
518 | * packet functions/utilities |
|
|
519 | * |
|
|
520 | **********************************************************************/ |
|
|
521 | |
|
|
522 | packet::packet (const char *name) |
|
|
523 | { |
|
|
524 | reset (); |
|
|
525 | |
|
|
526 | int len = strlen (name); |
|
|
527 | memcpy (cur, name, len); cur += len; |
|
|
528 | *cur++ = ' '; |
|
|
529 | } |
|
|
530 | |
|
|
531 | packet &packet::operator <<(const ber32 v) |
|
|
532 | { |
|
|
533 | enum { maxlen = 32 / 7 + 1}; |
|
|
534 | uint8 buf[maxlen]; |
|
|
535 | uint8 *p = buf + maxlen; |
|
|
536 | uint32 val = v.val; |
|
|
537 | |
|
|
538 | *--p = val & 0x7F; |
|
|
539 | |
|
|
540 | while (val > 0x7F) |
|
|
541 | { |
|
|
542 | val >>= 7; |
|
|
543 | *--p = (val & 0x7F) | 0x80; |
|
|
544 | } |
|
|
545 | |
|
|
546 | return *this << data (p, buf + maxlen - p); |
|
|
547 | } |
|
|
548 | |
|
|
549 | packet &packet::operator <<(const data &v) |
|
|
550 | { |
|
|
551 | if (room () < v.len) |
|
|
552 | reset (); |
|
|
553 | else |
|
|
554 | { |
|
|
555 | if (v.len) |
|
|
556 | { |
|
|
557 | memcpy (cur, v.ptr, v.len); |
|
|
558 | cur += v.len; |
|
|
559 | } |
|
|
560 | } |
|
|
561 | |
|
|
562 | return *this; |
|
|
563 | } |
|
|
564 | |
|
|
565 | packet &packet::operator <<(const data8 &v) |
|
|
566 | { |
|
|
567 | unsigned int len = min (v.len, 0x00FF); |
|
|
568 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
569 | } |
|
|
570 | |
|
|
571 | packet &packet::operator <<(const data16 &v) |
|
|
572 | { |
|
|
573 | unsigned int len = min (v.len, 0xFFFF); |
|
|
574 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
575 | } |
|
|
576 | |
|
|
577 | packet &packet::operator <<(const char *v) |
|
|
578 | { |
|
|
579 | return *this << data (v, strlen (v ? v : 0)); |
|
|
580 | } |
|
|
581 | |
|
|
582 | void |
|
|
583 | packet::vprintf (const char *format, va_list ap) |
|
|
584 | { |
|
|
585 | int size = room (); |
|
|
586 | |
|
|
587 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
588 | |
|
|
589 | if (len >= size) |
|
|
590 | return reset (); |
|
|
591 | |
|
|
592 | cur += len; |
431 | } |
593 | } |
432 | |
594 | |
433 | /****************************************************************************** |
595 | /****************************************************************************** |
434 | * |
596 | * |
435 | * statistics logging functions. |
597 | * statistics logging functions. |
… | |
… | |
459 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
621 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
460 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
622 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
461 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
623 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
462 | cst_lst.ibytes = 0; |
624 | cst_lst.ibytes = 0; |
463 | cst_lst.obytes = 0; |
625 | cst_lst.obytes = 0; |
464 | cst_lst.max_conn = socket_info.nconns; |
|
|
465 | cst_lst.time_start = now; |
626 | cst_lst.time_start = now; |
466 | } |
627 | } |
467 | #endif |
628 | #endif |
468 | |
629 | |