1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | |
3 | * |
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
5 | |
6 | * |
6 | This program is free software; you can redistribute it and/or modify |
7 | * Crossfire TRT 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 3 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, see <http://www.gnu.org/licenses/>. |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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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 <crossfire@schmorp.de> |
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 | // disconnect a socket after this many seconds without an ack |
51 | // easily die in 20 seconds... |
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52 | #define SOCKET_TIMEOUT1 10 |
37 | #define SOCKET_TIMEOUT 8. |
53 | #define SOCKET_TIMEOUT2 20 |
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54 | |
38 | |
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39 | // force a packet when idle for more than this many seconds, |
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40 | // forcing an ack regularly. |
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41 | #define IDLE_PING 2. |
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42 | |
55 | void |
43 | void |
56 | client_socket::flush () |
44 | client::flush () |
57 | { |
45 | { |
58 | #ifdef __linux__ |
46 | if (destroyed ()) |
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47 | return; |
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48 | |
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49 | #if HAVE_TCP_INFO |
59 | // check time of last ack, and, if too old, kill connection |
50 | // check time of last ack, and, if too old, kill connection |
60 | struct tcp_info tcpi; |
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61 | socklen_t len = sizeof (tcpi); |
51 | socklen_t len = sizeof (tcpi); |
62 | |
52 | |
63 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
53 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
64 | { |
54 | { |
65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
55 | if (tcpi.tcpi_snd_mss) |
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56 | mss = tcpi.tcpi_snd_mss; |
66 | |
57 | |
67 | rtt = tcpi.tcpi_rtt; |
58 | #if 0 |
68 | rttvar = tcpi.tcpi_rttvar; |
59 | fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n", |
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60 | tcpi.tcpi_unacked, |
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61 | tcpi.tcpi_sacked, |
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62 | tcpi.tcpi_lost, |
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63 | tcpi.tcpi_retrans, |
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64 | tcpi.tcpi_fackets, |
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65 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
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66 | |
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67 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
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68 | #endif |
69 | |
69 | |
70 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
70 | // do this only when player is active |
71 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
71 | if (pl && pl->active |
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72 | && tcpi.tcpi_last_ack_recv > int (SOCKET_TIMEOUT * 1000)) |
72 | { |
73 | { |
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74 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
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75 | write_outputbuffer (); |
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76 | |
73 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
77 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
74 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
78 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
75 | status = Ns_Dead; |
79 | destroy (); |
76 | } |
80 | } |
77 | } |
81 | } |
78 | #endif |
82 | #endif |
79 | |
83 | |
80 | /** |
84 | /** |
… | |
… | |
82 | * |
86 | * |
83 | * When the socket is clear to write, and we have backlogged data, this |
87 | * When the socket is clear to write, and we have backlogged data, this |
84 | * is called to write it out. |
88 | * is called to write it out. |
85 | */ |
89 | */ |
86 | |
90 | |
87 | if (!outputbuffer.len || socket_ev.poll () & PE_W) |
91 | // write a nop to the socket at least every IDLE_NOP seconds. |
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92 | if (!outputbuffer.len) |
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93 | { |
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94 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
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95 | { |
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96 | // this is a bit ugly, but map1/map1a seem to be the only |
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97 | // nop'able commands and they are quite small. |
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98 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
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99 | send_packet (sl); |
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100 | } |
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101 | else |
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102 | return; |
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103 | } |
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104 | |
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105 | if (socket_ev.poll () & PE_W) |
88 | return; |
106 | return; |
89 | |
107 | |
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108 | last_send = NOW; |
90 | write_outputbuffer (); |
109 | write_outputbuffer (); |
91 | } |
110 | } |
92 | |
111 | |
93 | void |
112 | void |
94 | client_socket::write_outputbuffer () |
113 | client::write_outputbuffer () |
95 | { |
114 | { |
96 | while (outputbuffer.len) |
115 | while (outputbuffer.len) |
97 | { |
116 | { |
98 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
117 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
99 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
118 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
… | |
… | |
104 | /* wrap back to start of buffer */ |
123 | /* wrap back to start of buffer */ |
105 | if (outputbuffer.start == SOCKETBUFSIZE) |
124 | if (outputbuffer.start == SOCKETBUFSIZE) |
106 | outputbuffer.start = 0; |
125 | outputbuffer.start = 0; |
107 | |
126 | |
108 | outputbuffer.len -= res; |
127 | outputbuffer.len -= res; |
109 | #ifdef CS_LOGSTATS |
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110 | cst_tot.obytes += res; |
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111 | cst_lst.obytes += res; |
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112 | #endif |
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113 | } |
128 | } |
114 | else if (res == 0) |
129 | else if (res == 0) |
115 | { |
130 | { |
116 | LOG (llevError, "socket write failed, connection closed.\n"); |
131 | LOG (llevError, "socket write failed, connection closed.\n"); |
117 | status = Ns_Dead; |
132 | destroy (); |
118 | return; |
133 | return; |
119 | } |
134 | } |
120 | else if (errno == EINTR) |
135 | else if (errno == EINTR) |
121 | { |
136 | { |
122 | // just retry |
137 | // just retry |
… | |
… | |
129 | return; |
144 | return; |
130 | } |
145 | } |
131 | else |
146 | else |
132 | { |
147 | { |
133 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
148 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
134 | status = Ns_Dead; |
149 | destroy (); |
135 | return; |
150 | return; |
136 | } |
151 | } |
137 | } |
152 | } |
138 | |
153 | |
139 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
154 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
140 | } |
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141 | |
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142 | /*********************************************************************** |
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143 | * |
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144 | * packet functions/utilities |
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145 | * |
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146 | **********************************************************************/ |
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147 | |
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148 | packet &packet::operator <<(const data &v) |
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149 | { |
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150 | if (room () < v.len) |
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151 | reset (); |
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152 | else |
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153 | { |
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154 | if (v.len) |
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155 | { |
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156 | memcpy (cur, v.ptr, v.len); |
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157 | cur += v.len; |
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158 | } |
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159 | } |
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160 | |
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161 | return *this; |
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162 | } |
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163 | |
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164 | packet &packet::operator <<(const data8 &v) |
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165 | { |
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166 | unsigned int len = min (v.len, 0x00FF); |
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167 | return *this << uint8 (len) << data (v.ptr, len); |
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168 | } |
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169 | |
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170 | packet &packet::operator <<(const data16 &v) |
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171 | { |
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172 | unsigned int len = min (v.len, 0xFFFF); |
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173 | return *this << uint16 (len) << data (v.ptr, len); |
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174 | } |
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175 | |
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176 | packet &packet::operator <<(const char *v) |
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177 | { |
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178 | return *this << data (v, strlen (v ? v : 0)); |
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179 | } |
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180 | |
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181 | void |
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182 | packet::printf (const char *format, ...) |
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183 | { |
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184 | int size = room (); |
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185 | |
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186 | va_list ap; |
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187 | va_start (ap, format); |
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188 | int len = vsnprintf ((char *)cur, size, format, ap); |
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189 | va_end (ap); |
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190 | |
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191 | if (len >= size) |
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192 | return reset (); |
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193 | |
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194 | cur += len; |
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195 | } |
155 | } |
196 | |
156 | |
197 | /****************************************************************************** |
157 | /****************************************************************************** |
198 | * |
158 | * |
199 | * Start of read routines. |
159 | * Start of read routines. |
200 | * |
160 | * |
201 | ******************************************************************************/ |
161 | ******************************************************************************/ |
202 | |
162 | |
203 | int |
163 | int |
204 | client_socket::read_packet () |
164 | client::next_packet () |
205 | { |
165 | { |
206 | for (;;) |
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207 | { |
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208 | if (inbuf_len >= 2) |
166 | if (inbuf_len >= 2) |
209 | { |
167 | { |
210 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
168 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
211 | |
169 | |
212 | if (inbuf_len >= 2 + pkt_len) |
170 | if (inbuf_len >= 2 + pkt_len) |
213 | return pkt_len + 2; |
171 | return 2 + pkt_len; |
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172 | |
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173 | if (inbuf_len == sizeof (inbuf)) |
214 | } |
174 | { |
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175 | send_packet_printf ("drawinfo %d input buffer overflow - closing connection.", NDI_RED | NDI_REPLY); |
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176 | destroy (); |
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177 | return -1; |
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178 | } |
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179 | } |
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180 | |
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181 | return 0; |
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182 | } |
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183 | |
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184 | void |
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185 | client::skip_packet (int len) |
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186 | { |
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187 | inbuf_len -= len; |
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188 | memmove (inbuf, inbuf + len, inbuf_len); |
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189 | } |
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190 | |
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191 | /***************************************************************************** |
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192 | * Start of command dispatch area. |
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193 | * The commands here are protocol commands. |
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194 | ****************************************************************************/ |
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195 | |
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196 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
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197 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
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198 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
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199 | |
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200 | /** |
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201 | * Dispatch table for the server. |
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202 | */ |
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203 | static struct packet_type packets[] = { |
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204 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
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205 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
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206 | |
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207 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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208 | {"ex", PC(ExCmd) PF_PLAYING }, |
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209 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
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210 | {"lookat", PC(LookAt) PF_PLAYING }, |
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211 | {"lock", PC(LockItem) PF_PLAYING }, |
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212 | {"mark", PC(MarkItem) PF_PLAYING }, |
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213 | {"move", PC(MoveCmd) PF_PLAYING }, |
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214 | {"ext", PC(ExtCmd) 0 }, // CF+ |
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215 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
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216 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
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217 | |
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218 | {"reply", SC(ReplyCmd) 0 }, |
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219 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
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220 | {"addme", SC(AddMeCmd) 0 }, |
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221 | {"askface", SC(AskFaceCmd) 0 }, |
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222 | {"requestinfo", SC(RequestInfo) 0 }, |
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223 | {"setfacemode", SC(SetFaceMode) 0 }, |
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224 | {"setsound", SC(SetSound) 0 }, |
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225 | {"setup", SC(SetUp) 0 }, |
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226 | {"version", SC(VersionCmd) 0 }, |
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227 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
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228 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
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229 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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230 | }; |
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231 | |
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232 | bool |
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233 | client::may_execute (const packet_type *pkt) const |
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234 | { |
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235 | return (!(pkt->flags & PF_PLAYER) || pl) |
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236 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
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237 | } |
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238 | |
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239 | // HACK: some commands currently should be executed |
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240 | // even when the player is frozen. this hack detects |
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241 | // those commands. it should be folded into may_execute, |
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242 | // but kept seperate to emphasise the hack aspect, i.e. |
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243 | // do it better, then remove. |
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244 | static bool |
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245 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
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246 | { |
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247 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
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248 | return false; |
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249 | |
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250 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
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251 | return false; |
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252 | |
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253 | if (pkt->flags & PF_COMMAND6) |
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254 | { |
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255 | data += 6; |
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256 | len -= 6; |
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257 | } |
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258 | |
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259 | if (len > 4 && !strncmp (data, "say " , 4)) |
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260 | return true; |
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261 | if (len > 5 && !strncmp (data, "chat ", 5)) |
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262 | return true; |
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263 | |
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264 | return false; |
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265 | } |
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266 | |
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267 | void |
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268 | client::execute (const packet_type *pkt, char *data, int datalen) |
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269 | { |
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270 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
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271 | { |
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272 | //TODO: only one format |
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273 | if (pkt->flags & PF_PLAYER) |
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274 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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275 | else |
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276 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
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277 | } |
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278 | else |
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279 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
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280 | } |
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281 | |
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282 | bool |
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283 | client::handle_packet () |
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284 | { |
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285 | int pkt_len = next_packet (); |
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286 | |
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287 | if (!pkt_len) |
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288 | return false; |
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289 | else if (pkt_len < 0) |
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290 | { |
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291 | LOG (llevError, "read error on player %s\n", |
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292 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
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293 | destroy (); |
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294 | return false; |
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295 | } |
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296 | |
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297 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
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298 | |
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299 | /* First, break out beginning word. There are at least |
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300 | * a few commands that do not have any paremeters. If |
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301 | * we get such a command, don't worry about trying |
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302 | * to break it up. |
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303 | */ |
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304 | int datalen; |
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305 | char *data = strchr ((char *)inbuf + 2, ' '); |
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306 | |
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307 | if (data) |
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308 | { |
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309 | *data++ = 0; |
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310 | datalen = pkt_len - (data - (char *)inbuf); |
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311 | } |
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312 | else |
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313 | { |
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314 | data = (char *)inbuf + 2; // better read garbage than segfault |
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315 | datalen = 0; |
|
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316 | } |
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317 | |
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318 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
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319 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
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320 | { |
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321 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
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322 | queue_command (pkt, data, datalen); |
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323 | else |
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324 | execute (pkt, data, datalen); |
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325 | |
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326 | goto next_packet; |
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327 | } |
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328 | |
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329 | // If we get here, we didn't find a valid command. |
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330 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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331 | next_packet: |
|
|
332 | skip_packet (pkt_len); |
|
|
333 | |
|
|
334 | // input buffer has space again |
|
|
335 | socket_ev.poll (socket_ev.poll () | PE_R); |
|
|
336 | |
|
|
337 | return true; |
|
|
338 | } |
|
|
339 | |
|
|
340 | // callback called when socket is either readable or writable |
|
|
341 | void |
|
|
342 | client::socket_cb (iow &w, int got) |
|
|
343 | { |
|
|
344 | //TODO remove when we have better socket cleanup logic |
|
|
345 | if (destroyed ()) |
|
|
346 | { |
|
|
347 | socket_ev.poll (0); |
|
|
348 | return; |
|
|
349 | } |
|
|
350 | |
|
|
351 | if (got & PE_W) |
|
|
352 | { |
|
|
353 | write_outputbuffer (); |
|
|
354 | |
|
|
355 | if (!outputbuffer.len) |
|
|
356 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
357 | } |
|
|
358 | |
|
|
359 | if (got & PE_R) |
|
|
360 | { |
|
|
361 | //TODO: rate-limit tcp connection in better ways, important |
215 | |
362 | |
216 | int amount = sizeof (inbuf) - inbuf_len; |
363 | int amount = sizeof (inbuf) - inbuf_len; |
217 | |
364 | |
218 | if (amount <= 0) |
365 | if (!amount) |
219 | { |
366 | { |
220 | LOG (llevError, "packet too large");//TODO |
367 | // input buffer full |
|
|
368 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
221 | return -1; |
369 | return; |
222 | } |
370 | } |
223 | |
371 | |
224 | amount = read (fd, inbuf + inbuf_len, amount); |
372 | amount = read (fd, inbuf + inbuf_len, amount); |
225 | |
373 | |
226 | if (!amount) |
374 | if (!amount) |
227 | { |
375 | { |
228 | status = Ns_Dead; |
376 | destroy (); |
229 | return -1; |
377 | return; |
230 | } |
378 | } |
231 | else if (amount < 0) |
379 | else if (amount < 0) |
232 | { |
380 | { |
233 | if (errno != EAGAIN && errno != EINTR) |
381 | if (errno != EAGAIN && errno != EINTR) |
234 | { |
382 | { |
235 | LOG (llevError, "read error: %s\n", strerror (errno)); |
383 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
|
384 | destroy (); |
236 | return -1; |
385 | return; |
237 | } |
386 | } |
238 | |
387 | |
239 | return 0; |
388 | // should not be here, normally |
|
|
389 | } |
|
|
390 | else |
240 | } |
391 | { |
241 | |
|
|
242 | inbuf_len += amount; |
392 | inbuf_len += amount; |
243 | |
393 | |
244 | cst_tot.ibytes += amount; |
394 | cmd_ev.start (); |
245 | cst_lst.ibytes += amount; |
395 | } |
246 | } |
396 | } |
247 | } |
397 | } |
248 | |
398 | |
|
|
399 | // called whenever we have additional commands to process |
249 | void |
400 | void |
250 | client_socket::skip_packet (int len) |
401 | client::cmd_cb (iw &w) |
251 | { |
402 | { |
252 | inbuf_len -= len; |
403 | if (handle_packet ()) |
253 | memmove (inbuf, inbuf + len, inbuf_len); |
404 | w.start (); |
|
|
405 | else |
|
|
406 | flush (); |
254 | } |
407 | } |
255 | |
408 | |
256 | /******************************************************************************* |
409 | /******************************************************************************* |
257 | * |
410 | * |
258 | * Start of write related routines. |
411 | * Start of write related routines. |
… | |
… | |
264 | * |
417 | * |
265 | * ns is the socket we are adding the data to, buf is the start of the |
418 | * ns is the socket we are adding the data to, buf is the start of the |
266 | * data, and len is the number of bytes to add. |
419 | * data, and len is the number of bytes to add. |
267 | */ |
420 | */ |
268 | void |
421 | void |
269 | client_socket::send (void *buf_, int len) |
422 | client::send (void *buf_, int len) |
270 | { |
423 | { |
271 | char *buf = (char *)buf_; |
424 | char *buf = (char *)buf_; |
272 | char *pos = buf; |
|
|
273 | int amt = 0; |
|
|
274 | |
425 | |
275 | if (status == Ns_Dead || !buf) |
426 | if (destroyed () || !buf) |
276 | { |
|
|
277 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
278 | return; |
427 | return; |
279 | } |
|
|
280 | |
428 | |
281 | if ((len + outputbuffer.len) > SOCKETBUFSIZE) |
429 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
282 | { |
430 | { |
283 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
431 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
284 | status = Ns_Dead; |
432 | // shutdown the socket, this is safer than destroying it immediately |
|
|
433 | // as lots of code in the callchain might still access the map etc. |
|
|
434 | shutdown (fd, SHUT_RDWR); |
285 | return; |
435 | return; |
286 | } |
436 | } |
287 | |
437 | |
288 | int avail, end; |
438 | int avail, end; |
289 | |
439 | |
… | |
… | |
307 | } |
457 | } |
308 | |
458 | |
309 | outputbuffer.len += len; |
459 | outputbuffer.len += len; |
310 | } |
460 | } |
311 | |
461 | |
312 | void |
|
|
313 | client_socket::socket_cb (iow &w, int got) |
|
|
314 | { |
|
|
315 | write_outputbuffer (); |
|
|
316 | |
|
|
317 | if (!outputbuffer.len) |
|
|
318 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
|
319 | } |
|
|
320 | |
|
|
321 | /** |
462 | /** |
322 | * Takes a string of data, and writes it out to the socket. A very handy |
463 | * Takes a string of data, and writes it out to the socket. A very handy |
323 | * shortcut function. |
464 | * shortcut function. |
324 | */ |
465 | */ |
325 | void |
466 | void |
326 | client_socket::send_packet (packet &sl) |
467 | client::send_packet (packet &sl) |
327 | { |
468 | { |
328 | if (status == Ns_Dead) |
469 | if (destroyed ()) |
329 | return; |
470 | return; |
330 | |
471 | |
331 | if (sl.length () >= MAXSOCKBUF) |
472 | if (sl.length () >= MAXSOCKBUF) |
332 | { |
473 | { |
333 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
474 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
… | |
… | |
347 | |
488 | |
348 | send (sl.buf_, sl.length () + sl.hdrlen); |
489 | send (sl.buf_, sl.length () + sl.hdrlen); |
349 | } |
490 | } |
350 | |
491 | |
351 | void |
492 | void |
352 | client_socket::send_packet (const char *buf, int len) |
493 | client::send_packet (const char *buf, int len) |
353 | { |
494 | { |
354 | packet sl; |
495 | packet sl; |
355 | |
496 | |
356 | sl << data (buf, len); |
497 | sl << data (buf, len); |
357 | send_packet (sl); |
498 | send_packet (sl); |
358 | } |
499 | } |
359 | |
500 | |
360 | void |
501 | void |
361 | client_socket::send_packet (const char *buf) |
502 | client::send_packet (const char *buf) |
362 | { |
503 | { |
363 | send_packet (buf, strlen (buf)); |
504 | send_packet (buf, strlen (buf)); |
364 | } |
505 | } |
365 | |
506 | |
|
|
507 | void |
|
|
508 | client::send_packet_printf (const char *format, ...) |
|
|
509 | { |
|
|
510 | packet sl; |
|
|
511 | |
|
|
512 | va_list ap; |
|
|
513 | va_start (ap, format); |
|
|
514 | sl.vprintf (format, ap); |
|
|
515 | va_end (ap); |
|
|
516 | |
|
|
517 | send_packet (sl); |
|
|
518 | } |
|
|
519 | |
|
|
520 | // returns true when the message needs special (read: perl) treatment |
|
|
521 | static bool |
|
|
522 | msg_is_special (const char *msg) |
|
|
523 | { |
|
|
524 | return msg [strcspn (msg, "<[&\n")]; |
|
|
525 | } |
|
|
526 | |
|
|
527 | void |
|
|
528 | client::send_msg (int color, const char *type, const char *msg) |
|
|
529 | { |
|
|
530 | if (msg_is_special (msg)) |
|
|
531 | cfperl_send_msg (this, color, type, msg); |
|
|
532 | else if (can_msg) |
|
|
533 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
534 | else if (color < 0) |
|
|
535 | return; // client cannot handle this |
|
|
536 | else |
|
|
537 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
|
538 | } |
|
|
539 | |
|
|
540 | void |
|
|
541 | client::send_drawinfo (const char *msg, int flags) |
|
|
542 | { |
|
|
543 | send_msg (flags, "log", msg); |
|
|
544 | } |
|
|
545 | |
366 | /****************************************************************************** |
546 | /*********************************************************************** |
367 | * |
547 | * |
368 | * statistics logging functions. |
548 | * packet functions/utilities |
369 | * |
549 | * |
370 | ******************************************************************************/ |
550 | **********************************************************************/ |
371 | |
551 | |
372 | #ifdef CS_LOGSTATS |
552 | packet::packet (const char *name) |
373 | |
|
|
374 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
375 | * stats |
|
|
376 | */ |
|
|
377 | CS_Stats cst_tot, cst_lst; |
|
|
378 | |
|
|
379 | /** |
|
|
380 | * Writes out the gathered stats. We clear cst_lst. |
|
|
381 | */ |
|
|
382 | void |
|
|
383 | write_cs_stats (void) |
|
|
384 | { |
553 | { |
385 | time_t now = time (NULL); |
554 | reset (); |
386 | |
555 | |
387 | /* If no connections recently, don't both to log anything */ |
556 | int len = strlen (name); |
388 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
557 | memcpy (cur, name, len); cur += len; |
389 | return; |
558 | *cur++ = ' '; |
390 | |
|
|
391 | /* CSSTAT is put in so scripts can easily find the line */ |
|
|
392 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
393 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
394 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
395 | cst_lst.ibytes = 0; |
|
|
396 | cst_lst.obytes = 0; |
|
|
397 | cst_lst.time_start = now; |
|
|
398 | } |
559 | } |
399 | #endif |
|
|
400 | |
560 | |
|
|
561 | packet &packet::operator <<(const ber32 v) |
|
|
562 | { |
|
|
563 | enum { maxlen = 32 / 7 + 1}; |
|
|
564 | uint8 buf[maxlen]; |
|
|
565 | uint8 *p = buf + maxlen; |
|
|
566 | uint32 val = v.val; |
|
|
567 | |
|
|
568 | *--p = val & 0x7F; |
|
|
569 | |
|
|
570 | while (val > 0x7F) |
|
|
571 | { |
|
|
572 | val >>= 7; |
|
|
573 | *--p = (val & 0x7F) | 0x80; |
|
|
574 | } |
|
|
575 | |
|
|
576 | return *this << data (p, buf + maxlen - p); |
|
|
577 | } |
|
|
578 | |
|
|
579 | packet &packet::operator <<(const data &v) |
|
|
580 | { |
|
|
581 | if (room () < v.len) |
|
|
582 | reset (); |
|
|
583 | else |
|
|
584 | { |
|
|
585 | if (v.len) |
|
|
586 | { |
|
|
587 | memcpy (cur, v.ptr, v.len); |
|
|
588 | cur += v.len; |
|
|
589 | } |
|
|
590 | } |
|
|
591 | |
|
|
592 | return *this; |
|
|
593 | } |
|
|
594 | |
|
|
595 | packet &packet::operator <<(const data8 &v) |
|
|
596 | { |
|
|
597 | unsigned int len = min (v.len, 0x00FF); |
|
|
598 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
599 | } |
|
|
600 | |
|
|
601 | packet &packet::operator <<(const data16 &v) |
|
|
602 | { |
|
|
603 | unsigned int len = min (v.len, 0xFFFF); |
|
|
604 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
605 | } |
|
|
606 | |
|
|
607 | packet &packet::operator <<(const char *v) |
|
|
608 | { |
|
|
609 | return *this << data (v, strlen (v ? v : 0)); |
|
|
610 | } |
|
|
611 | |
|
|
612 | void |
|
|
613 | packet::vprintf (const char *format, va_list ap) |
|
|
614 | { |
|
|
615 | int size = room (); |
|
|
616 | |
|
|
617 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
618 | |
|
|
619 | if (len >= size) |
|
|
620 | return reset (); |
|
|
621 | |
|
|
622 | cur += len; |
|
|
623 | } |
|
|
624 | |