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 | // 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 | Socket_Flush (NewSocket * ns) |
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 | |
45 | |
63 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
46 | /** |
64 | { |
47 | * Writes data to socket. |
65 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
48 | * |
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49 | * When the socket is clear to write, and we have backlogged data, this |
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50 | * is called to write it out. |
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51 | */ |
66 | |
52 | |
67 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
53 | // write a nop to the socket at least every IDLE_NOP seconds. |
68 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
54 | if (!outputbuffer.len) |
69 | { |
55 | { |
70 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
56 | if (last_send + IDLE_PING <= NOW && pl && pl->active) |
71 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
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72 | ns->status = Ns_Dead; |
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73 | } |
57 | { |
74 | } |
58 | // this is a bit ugly, but map1/map1a seem to be the only |
75 | |
59 | // nop'able commands and they are quite small. |
76 | int val; |
60 | packet sl (mapmode == Map1Cmd ? "map1" : "map1a"); |
77 | |
61 | send_packet (sl); |
78 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
62 | } |
79 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
63 | else |
80 | #endif |
64 | return; |
81 | } |
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82 | |
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83 | /*********************************************************************** |
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84 | * |
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85 | * packet functions/utilities |
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86 | * |
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87 | **********************************************************************/ |
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88 | |
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89 | packet &packet::operator <<(const data &v) |
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90 | { |
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91 | if (v.len) |
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92 | { |
65 | } |
93 | memcpy (buf + len, v.ptr, v.len); |
66 | |
94 | len += v.len; |
67 | if (socket_ev.poll () & PE_W) |
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68 | return; |
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69 | |
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70 | last_send = NOW; |
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71 | write_outputbuffer (); |
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72 | } |
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73 | |
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74 | void |
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75 | client::write_outputbuffer () |
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76 | { |
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77 | while (outputbuffer.len) |
95 | } |
78 | { |
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79 | int res = write (fd, outputbuffer.data + outputbuffer.start, |
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80 | min (outputbuffer.len, SOCKETBUFSIZE - outputbuffer.start)); |
96 | |
81 | |
97 | return *this; |
82 | if (res > 0) |
98 | } |
83 | { |
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84 | outputbuffer.start += res; |
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85 | /* wrap back to start of buffer */ |
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86 | if (outputbuffer.start == SOCKETBUFSIZE) |
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87 | outputbuffer.start = 0; |
99 | |
88 | |
100 | packet &packet::operator <<(const data8 &v) |
89 | outputbuffer.len -= res; |
101 | { |
90 | } |
102 | unsigned int len = min (v.len, 0x00FF); |
91 | else if (res == 0) |
103 | return *this << uint8 (len) << data (v.ptr, len); |
92 | { |
104 | } |
93 | LOG (llevError, "socket write failed, connection closed.\n"); |
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94 | destroy (); |
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95 | return; |
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96 | } |
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97 | else if (errno == EINTR) |
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98 | { |
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99 | // just retry |
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100 | } |
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101 | else if (errno == EAGAIN) |
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102 | { |
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103 | // delay till ready |
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104 | socket_ev.poll (socket_ev.poll () | PE_W); |
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105 | socket_ev.start (); |
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106 | return; |
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107 | } |
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108 | else |
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109 | { |
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110 | LOG (llevError, "socket write failed: %s\n", strerror (errno)); |
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111 | destroy (); |
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112 | return; |
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113 | } |
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114 | } |
105 | |
115 | |
106 | packet &packet::operator <<(const data16 &v) |
116 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
107 | { |
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108 | unsigned int len = min (v.len, 0xFFFF); |
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109 | return *this << uint16 (len) << data (v.ptr, len); |
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110 | } |
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111 | |
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112 | packet &packet::operator <<(const char *v) |
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113 | { |
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114 | return *this << data (v, strlen (v ? v : 0)); |
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115 | } |
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116 | |
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117 | void |
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118 | packet::printf (const char *format, ...) |
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119 | { |
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120 | va_list ap; |
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121 | va_start (ap, format); |
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122 | |
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123 | len += vsnprintf ((char *)buf + len, MAXSOCKBUF, format, ap); |
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124 | |
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125 | va_end (ap); |
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126 | } |
117 | } |
127 | |
118 | |
128 | /****************************************************************************** |
119 | /****************************************************************************** |
129 | * |
120 | * |
130 | * Start of read routines. |
121 | * Start of read routines. |
131 | * |
122 | * |
132 | ******************************************************************************/ |
123 | ******************************************************************************/ |
133 | |
124 | |
134 | int |
125 | int |
135 | NewSocket::read_packet () |
126 | client::next_packet () |
136 | { |
127 | { |
137 | for (;;) |
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138 | { |
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139 | if (inbuf_len >= 2) |
128 | if (inbuf_len >= 2) |
140 | { |
129 | { |
141 | unsigned int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
130 | int pkt_len = (inbuf [0] << 8) | inbuf [1]; |
142 | |
131 | |
143 | if (inbuf_len >= 2 + pkt_len) |
132 | if (inbuf_len >= 2 + pkt_len) |
144 | return pkt_len + 2; |
133 | return 2 + pkt_len; |
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134 | |
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135 | if (inbuf_len == sizeof (inbuf)) |
145 | } |
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 | |
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153 | /***************************************************************************** |
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154 | * Start of command dispatch area. |
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155 | * The commands here are protocol commands. |
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156 | ****************************************************************************/ |
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157 | |
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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 | /** |
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163 | * Dispatch table for the server. |
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164 | */ |
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165 | static struct packet_type packets[] = { |
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166 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
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167 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
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168 | |
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169 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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170 | {"ex", PC(ExCmd) PF_PLAYING }, |
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171 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
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172 | {"lookat", PC(LookAt) PF_PLAYING }, |
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173 | {"lock", PC(LockItem) PF_PLAYING }, |
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174 | {"mark", PC(MarkItem) PF_PLAYING }, |
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175 | {"move", PC(MoveCmd) PF_PLAYING }, |
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176 | {"ext", PC(ExtCmd) 0 }, // CF+ |
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177 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
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178 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
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179 | |
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180 | {"reply", SC(ReplyCmd) 0 }, |
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181 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
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182 | {"addme", SC(AddMeCmd) 0 }, |
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183 | {"askface", SC(AskFaceCmd) 0 }, |
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184 | {"requestinfo", SC(RequestInfo) 0 }, |
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185 | {"setfacemode", SC(SetFaceMode) 0 }, |
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186 | {"setsound", SC(SetSound) 0 }, |
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187 | {"setup", SC(SetUp) 0 }, |
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188 | {"version", SC(VersionCmd) 0 }, |
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189 | {"toggleextendedinfos", SC(ToggleExtendedInfos) 0 }, /*Added: tchize */ |
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190 | {"toggleextendedtext", SC(ToggleExtendedText) 0 }, /*Added: tchize */ |
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191 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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192 | }; |
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193 | |
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194 | bool |
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195 | client::may_execute (const packet_type *pkt) const |
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196 | { |
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197 | return (!(pkt->flags & PF_PLAYER) || pl) |
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198 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
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199 | } |
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200 | |
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201 | // HACK: some commands currently should be executed |
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202 | // even when the player is frozen. this hack detects |
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203 | // those commands. it should be folded into may_execute, |
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204 | // but kept seperate to emphasise the hack aspect, i.e. |
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205 | // do it better, then remove. |
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206 | static bool |
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207 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
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208 | { |
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209 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
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210 | return false; |
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211 | |
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212 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
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213 | return false; |
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214 | |
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215 | if (pkt->flags & PF_COMMAND6) |
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216 | { |
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217 | data += 6; |
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218 | len -= 6; |
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219 | } |
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220 | |
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221 | if (len > 4 && !strncmp (data, "say " , 4)) |
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222 | return true; |
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223 | if (len > 5 && !strncmp (data, "chat ", 5)) |
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224 | return true; |
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225 | |
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226 | return false; |
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227 | } |
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228 | |
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229 | void |
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230 | client::execute (const packet_type *pkt, char *data, int datalen) |
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231 | { |
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232 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
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233 | { |
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234 | //TODO: only one format |
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235 | if (pkt->flags & PF_PLAYER) |
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236 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
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237 | else |
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238 | ((void (*)(char *, int, client *))pkt->cb)((char *)data, datalen, this); |
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239 | } |
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240 | else |
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241 | send_packet_printf ("drawinfo %d ERROR: you cannot execute '%s' now.", NDI_RED | NDI_REPLY, pkt->name); |
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242 | } |
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243 | |
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244 | bool |
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245 | client::handle_packet () |
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246 | { |
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247 | int pkt_len = next_packet (); |
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248 | |
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249 | if (!pkt_len) |
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250 | return false; |
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251 | else if (pkt_len < 0) |
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252 | { |
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253 | LOG (llevError, "read error on player %s\n", |
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254 | pl && pl->ob ? &pl->ob->name : "[anonymous]"); |
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255 | destroy (); |
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256 | return false; |
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257 | } |
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258 | |
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259 | inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
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260 | |
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261 | /* First, break out beginning word. There are at least |
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262 | * a few commands that do not have any paremeters. If |
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263 | * we get such a command, don't worry about trying |
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264 | * to break it up. |
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265 | */ |
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266 | int datalen; |
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267 | char *data = strchr ((char *)inbuf + 2, ' '); |
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268 | |
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269 | if (data) |
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270 | { |
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271 | *data++ = 0; |
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272 | datalen = pkt_len - (data - (char *)inbuf); |
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273 | } |
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274 | else |
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275 | { |
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276 | data = (char *)inbuf + 2; // better read garbage than segfault |
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277 | datalen = 0; |
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278 | } |
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279 | |
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280 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
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281 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
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282 | { |
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283 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
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284 | queue_command (pkt, data, datalen); |
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285 | else |
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286 | execute (pkt, data, datalen); |
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287 | |
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288 | goto next_packet; |
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289 | } |
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290 | |
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291 | // If we get here, we didn't find a valid command. |
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292 | send_packet_printf ("drawinfo %d ERROR: command '%s' not supported.", NDI_RED | NDI_REPLY, (char *)inbuf + 2); |
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293 | next_packet: |
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294 | skip_packet (pkt_len); |
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295 | |
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296 | // input buffer has space again |
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297 | socket_ev.poll (socket_ev.poll () | PE_R); |
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298 | |
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299 | return true; |
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300 | } |
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301 | |
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302 | // callback called when socket is either readable or writable |
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303 | void |
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304 | client::socket_cb (iow &w, int got) |
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305 | { |
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306 | //TODO remove when we have better socket cleanup logic |
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307 | if (destroyed ()) |
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308 | { |
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309 | socket_ev.poll (0); |
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310 | return; |
|
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311 | } |
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312 | |
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313 | if (got & PE_W) |
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314 | { |
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315 | write_outputbuffer (); |
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316 | |
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317 | if (!outputbuffer.len) |
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318 | socket_ev.poll (socket_ev.poll () & ~PE_W); |
|
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319 | } |
|
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320 | |
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321 | if (got & PE_R) |
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322 | { |
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323 | //TODO: rate-limit tcp connection in better ways, important |
146 | |
324 | |
147 | int amount = sizeof (inbuf) - inbuf_len; |
325 | int amount = sizeof (inbuf) - inbuf_len; |
148 | |
326 | |
149 | if (amount <= 0) |
327 | if (!amount) |
150 | { |
328 | { |
151 | LOG (llevError, "packet too large");//TODO |
329 | // input buffer full |
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330 | socket_ev.poll (socket_ev.poll () & ~PE_R); |
152 | return -1; |
331 | return; |
153 | } |
332 | } |
154 | |
333 | |
155 | amount = read (fd, inbuf + inbuf_len, amount); |
334 | amount = read (fd, inbuf + inbuf_len, amount); |
156 | |
335 | |
157 | if (!amount) |
336 | if (!amount) |
158 | { |
337 | { |
159 | status = Ns_Dead; |
338 | destroy (); |
160 | return -1; |
339 | return; |
161 | } |
340 | } |
162 | else if (amount < 0) |
341 | else if (amount < 0) |
163 | { |
342 | { |
164 | if (errno != EAGAIN && errno != EINTR) |
343 | if (errno != EAGAIN && errno != EINTR) |
165 | { |
344 | { |
166 | LOG (llevError, "read error: %s", strerror (errno)); |
345 | LOG (llevError, "read error: %s\n", strerror (errno)); |
|
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346 | destroy (); |
167 | return -1; |
347 | return; |
168 | } |
348 | } |
169 | |
349 | |
170 | return 0; |
350 | // should not be here, normally |
|
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351 | } |
|
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352 | else |
171 | } |
353 | { |
172 | |
|
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173 | inbuf_len += amount; |
354 | inbuf_len += amount; |
174 | |
355 | |
175 | cst_tot.ibytes += amount; |
356 | if (handle_packet ()) |
176 | cst_lst.ibytes += amount; |
357 | { |
177 | } |
358 | while (handle_packet ()) |
178 | } |
359 | ; |
179 | |
360 | |
180 | void |
361 | flush (); |
181 | NewSocket::skip_packet (int len) |
362 | } |
182 | { |
363 | } |
183 | inbuf_len -= len; |
364 | } |
184 | memmove (inbuf, inbuf + len, inbuf_len); |
|
|
185 | } |
365 | } |
186 | |
366 | |
187 | /******************************************************************************* |
367 | /******************************************************************************* |
188 | * |
368 | * |
189 | * Start of write related routines. |
369 | * Start of write related routines. |
… | |
… | |
194 | * Adds data to a socket buffer for whatever reason. |
374 | * Adds data to a socket buffer for whatever reason. |
195 | * |
375 | * |
196 | * ns is the socket we are adding the data to, buf is the start of the |
376 | * ns is the socket we are adding the data to, buf is the start of the |
197 | * data, and len is the number of bytes to add. |
377 | * data, and len is the number of bytes to add. |
198 | */ |
378 | */ |
199 | |
379 | void |
200 | static void |
380 | client::send (void *buf_, int len) |
201 | add_to_buffer (NewSocket *ns, char *buf, int len) |
|
|
202 | { |
381 | { |
|
|
382 | char *buf = (char *)buf_; |
|
|
383 | |
|
|
384 | if (destroyed () || !buf) |
|
|
385 | return; |
|
|
386 | |
|
|
387 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
|
|
388 | { |
|
|
389 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
|
|
390 | // shutdown the socket, this is safer than destroying it immediately |
|
|
391 | // as lots of code in the callchain might still access the map etc. |
|
|
392 | shutdown (fd, SHUT_RDWR); |
|
|
393 | return; |
|
|
394 | } |
|
|
395 | |
203 | int avail, end; |
396 | int avail, end; |
204 | |
|
|
205 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
|
|
206 | { |
|
|
207 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
|
|
208 | ns->status = Ns_Dead; |
|
|
209 | return; |
|
|
210 | } |
|
|
211 | |
397 | |
212 | /* data + end is where we start putting the new data. The last byte |
398 | /* data + end is where we start putting the new data. The last byte |
213 | * currently in use is actually data + end -1 |
399 | * currently in use is actually data + end -1 |
214 | */ |
400 | */ |
215 | |
|
|
216 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
401 | end = outputbuffer.start + outputbuffer.len; |
217 | /* The buffer is already in a wrapped state, so adjust end */ |
402 | /* The buffer is already in a wrapped state, so adjust end */ |
218 | if (end >= SOCKETBUFSIZE) |
403 | if (end >= SOCKETBUFSIZE) |
219 | end -= SOCKETBUFSIZE; |
404 | end -= SOCKETBUFSIZE; |
220 | |
405 | |
221 | avail = SOCKETBUFSIZE - end; |
406 | avail = SOCKETBUFSIZE - end; |
222 | |
407 | |
223 | /* We can all fit it behind the current data without wrapping */ |
408 | /* We can all fit it behind the current data without wrapping */ |
224 | if (avail >= len) |
409 | if (avail >= len) |
225 | memcpy (ns->outputbuffer.data + end, buf, len); |
410 | memcpy (outputbuffer.data + end, buf, len); |
226 | else |
411 | else |
227 | { |
412 | { |
228 | memcpy (ns->outputbuffer.data + end, buf, avail); |
413 | memcpy (outputbuffer.data + end, buf, avail); |
229 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
414 | memcpy (outputbuffer.data, buf + avail, len - avail); |
230 | } |
415 | } |
231 | |
416 | |
232 | ns->outputbuffer.len += len; |
417 | outputbuffer.len += len; |
233 | #if 0 |
|
|
234 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
|
|
235 | #endif |
|
|
236 | } |
|
|
237 | |
|
|
238 | /** |
|
|
239 | * Writes data to socket. |
|
|
240 | * |
|
|
241 | * When the socket is clear to write, and we have backlogged data, this |
|
|
242 | * is called to write it out. |
|
|
243 | */ |
|
|
244 | void |
|
|
245 | write_socket_buffer (NewSocket * ns) |
|
|
246 | { |
|
|
247 | int amt, max; |
|
|
248 | |
|
|
249 | if (ns->outputbuffer.len == 0) |
|
|
250 | { |
|
|
251 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
|
|
252 | return; |
|
|
253 | } |
|
|
254 | |
|
|
255 | do |
|
|
256 | { |
|
|
257 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
|
|
258 | if (ns->outputbuffer.len < max) |
|
|
259 | max = ns->outputbuffer.len; |
|
|
260 | |
|
|
261 | do |
|
|
262 | { |
|
|
263 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
264 | } |
|
|
265 | while ((amt < 0) && (errno == EINTR)); |
|
|
266 | |
|
|
267 | if (amt < 0) |
|
|
268 | { /* We got an error */ |
|
|
269 | |
|
|
270 | if (errno != EWOULDBLOCK) |
|
|
271 | { |
|
|
272 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
|
|
273 | ns->status = Ns_Dead; |
|
|
274 | return; |
|
|
275 | } |
|
|
276 | else |
|
|
277 | { /* EWOULDBLOCK */ |
|
|
278 | /* can't write it, so store it away. */ |
|
|
279 | ns->can_write = 0; |
|
|
280 | return; |
|
|
281 | } |
|
|
282 | } |
|
|
283 | ns->outputbuffer.start += amt; |
|
|
284 | /* wrap back to start of buffer */ |
|
|
285 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
286 | ns->outputbuffer.start = 0; |
|
|
287 | ns->outputbuffer.len -= amt; |
|
|
288 | #ifdef CS_LOGSTATS |
|
|
289 | cst_tot.obytes += amt; |
|
|
290 | cst_lst.obytes += amt; |
|
|
291 | #endif |
|
|
292 | } |
|
|
293 | while (ns->outputbuffer.len > 0); |
|
|
294 | } |
|
|
295 | |
|
|
296 | /** |
|
|
297 | * This writes data to the socket. - It is very low level - |
|
|
298 | * all we try and do is write out the data to the socket |
|
|
299 | * provided (ns). buf is the data to write, len is the number |
|
|
300 | * of bytes to write. IT doesn't return anything - rather, it |
|
|
301 | * updates the ns structure if we get an error. |
|
|
302 | */ |
|
|
303 | void |
|
|
304 | Write_To_Socket (NewSocket * ns, char *buf, int len) |
|
|
305 | { |
|
|
306 | int amt = 0; |
|
|
307 | char *pos = buf; |
|
|
308 | |
|
|
309 | if (ns->status == Ns_Dead || !buf) |
|
|
310 | { |
|
|
311 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
|
|
312 | return; |
|
|
313 | } |
|
|
314 | |
|
|
315 | #ifndef __GNU__ /* This caused problems on Hurd */ |
|
|
316 | if (!ns->can_write) |
|
|
317 | { |
|
|
318 | add_to_buffer (ns, buf, len); |
|
|
319 | return; |
|
|
320 | } |
|
|
321 | #endif |
|
|
322 | /* If we manage to write more than we wanted, take it as a bonus */ |
|
|
323 | while (len > 0) |
|
|
324 | { |
|
|
325 | |
|
|
326 | do |
|
|
327 | { |
|
|
328 | amt = write (ns->fd, pos, len); |
|
|
329 | } |
|
|
330 | while ((amt < 0) && (errno == EINTR)); |
|
|
331 | |
|
|
332 | if (amt < 0) |
|
|
333 | { /* We got an error */ |
|
|
334 | if (errno != EWOULDBLOCK) |
|
|
335 | { |
|
|
336 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
|
|
337 | errno, strerror (errno)); |
|
|
338 | ns->status = Ns_Dead; |
|
|
339 | return; |
|
|
340 | } |
|
|
341 | else |
|
|
342 | { /* EWOULDBLOCK */ |
|
|
343 | /* can't write it, so store it away. */ |
|
|
344 | add_to_buffer (ns, pos, len); |
|
|
345 | ns->can_write = 0; |
|
|
346 | return; |
|
|
347 | } |
|
|
348 | } |
|
|
349 | /* amt gets set to 0 above in blocking code, so we do this as |
|
|
350 | * an else if to make sure we don't reprocess it. |
|
|
351 | */ |
|
|
352 | else if (amt == 0) |
|
|
353 | { |
|
|
354 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
|
|
355 | } |
|
|
356 | len -= amt; |
|
|
357 | pos += amt; |
|
|
358 | #ifdef CS_LOGSTATS |
|
|
359 | cst_tot.obytes += amt; |
|
|
360 | cst_lst.obytes += amt; |
|
|
361 | #endif |
|
|
362 | } |
|
|
363 | } |
418 | } |
364 | |
419 | |
365 | /** |
420 | /** |
366 | * Takes a string of data, and writes it out to the socket. A very handy |
421 | * Takes a string of data, and writes it out to the socket. A very handy |
367 | * shortcut function. |
422 | * shortcut function. |
368 | */ |
423 | */ |
369 | |
|
|
370 | void |
424 | void |
371 | NewSocket::send_packet (packet &sl) |
425 | client::send_packet (packet &sl) |
372 | { |
426 | { |
373 | Send_With_Handling (this, &sl); |
427 | if (destroyed ()) |
374 | } |
|
|
375 | |
|
|
376 | void |
|
|
377 | NewSocket::send_packet (const char *buf, int len) |
|
|
378 | { |
|
|
379 | packet sl; |
|
|
380 | |
|
|
381 | sl << data (buf, len); |
|
|
382 | send_packet (sl); |
|
|
383 | } |
|
|
384 | |
|
|
385 | void |
|
|
386 | NewSocket::send_packet (const char *buf) |
|
|
387 | { |
|
|
388 | send_packet (buf, strlen (buf)); |
|
|
389 | } |
|
|
390 | |
|
|
391 | /** |
|
|
392 | * Calls Write_To_Socket to send data to the client. |
|
|
393 | * |
|
|
394 | * The only difference in this function is that we take a packet |
|
|
395 | *, and we prepend the length information. |
|
|
396 | */ |
|
|
397 | void |
|
|
398 | Send_With_Handling (NewSocket *ns, packet *msg) |
|
|
399 | { |
|
|
400 | unsigned char sbuf[4]; |
|
|
401 | |
|
|
402 | if (ns->status == Ns_Dead || !msg) |
|
|
403 | return; |
428 | return; |
404 | |
429 | |
405 | if (msg->len >= MAXSOCKBUF) |
430 | if (sl.length () > MAXSOCKBUF) |
406 | { |
431 | { |
407 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); |
432 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
408 | /* Almost certainly we've overflowed a buffer, so quite now to make |
433 | /* Almost certainly we've overflowed a buffer, so quit now to make |
409 | * it easier to debug. |
434 | * it easier to debug. |
410 | */ |
435 | */ |
411 | abort (); |
436 | abort (); |
412 | } |
437 | } |
413 | sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; |
|
|
414 | sbuf[1] = ((uint32) (msg->len)) & 0xFF; |
|
|
415 | if (ns->status != Ns_Old) |
|
|
416 | Write_To_Socket (ns, (char *) sbuf, 2); |
|
|
417 | Write_To_Socket (ns, (char *) msg->buf, msg->len); |
|
|
418 | } |
|
|
419 | |
438 | |
420 | /****************************************************************************** |
439 | if (!sl.length ()) |
421 | * |
|
|
422 | * statistics logging functions. |
|
|
423 | * |
|
|
424 | ******************************************************************************/ |
|
|
425 | |
|
|
426 | #ifdef CS_LOGSTATS |
|
|
427 | |
|
|
428 | /* cst_tot is for the life of the server, cst_last is for the last series of |
|
|
429 | * stats |
|
|
430 | */ |
|
|
431 | CS_Stats cst_tot, cst_lst; |
|
|
432 | |
|
|
433 | /** |
|
|
434 | * Writes out the gathered stats. We clear cst_lst. |
|
|
435 | */ |
|
|
436 | void |
|
|
437 | write_cs_stats (void) |
|
|
438 | { |
|
|
439 | time_t now = time (NULL); |
|
|
440 | |
|
|
441 | /* If no connections recently, don't both to log anything */ |
|
|
442 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
443 | return; |
440 | return; |
444 | |
441 | |
445 | /* CSSTAT is put in so scripts can easily find the line */ |
442 | assert (sl.hdrlen == 2); |
446 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
|
|
447 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
|
|
448 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
|
|
449 | cst_lst.ibytes = 0; |
|
|
450 | cst_lst.obytes = 0; |
|
|
451 | cst_lst.max_conn = socket_info.nconns; |
|
|
452 | cst_lst.time_start = now; |
|
|
453 | } |
|
|
454 | #endif |
|
|
455 | |
443 | |
|
|
444 | sl.buf_ [0] = sl.length () >> 8; |
|
|
445 | sl.buf_ [1] = sl.length () ; |
|
|
446 | |
|
|
447 | send (sl.buf_, sl.length () + sl.hdrlen); |
|
|
448 | } |
|
|
449 | |
|
|
450 | void |
|
|
451 | client::send_packet (const char *buf, int len) |
|
|
452 | { |
|
|
453 | packet sl; |
|
|
454 | |
|
|
455 | sl << data (buf, len); |
|
|
456 | send_packet (sl); |
|
|
457 | } |
|
|
458 | |
|
|
459 | void |
|
|
460 | client::send_packet (const char *buf) |
|
|
461 | { |
|
|
462 | send_packet (buf, strlen (buf)); |
|
|
463 | } |
|
|
464 | |
|
|
465 | void |
|
|
466 | client::send_packet_printf (const char *format, ...) |
|
|
467 | { |
|
|
468 | packet sl; |
|
|
469 | |
|
|
470 | va_list ap; |
|
|
471 | va_start (ap, format); |
|
|
472 | sl.vprintf (format, ap); |
|
|
473 | va_end (ap); |
|
|
474 | |
|
|
475 | send_packet (sl); |
|
|
476 | } |
|
|
477 | |
|
|
478 | // returns true when the message needs special (read: perl) treatment |
|
|
479 | static bool |
|
|
480 | msg_is_special (const char *msg) |
|
|
481 | { |
|
|
482 | return msg [strcspn (msg, "<[&\n")]; |
|
|
483 | } |
|
|
484 | |
|
|
485 | void |
|
|
486 | client::send_msg (int color, const char *type, const char *msg) |
|
|
487 | { |
|
|
488 | if (!msg || !type) // it can happen (for example, missing attack messages cause this) |
|
|
489 | { |
|
|
490 | LOG (logBacktrace | llevError, "send_msg(%d,%p,%p) called with NULL msg or type.\n", color, type, msg); |
|
|
491 | return; |
|
|
492 | } |
|
|
493 | |
|
|
494 | int len = strlen (msg); |
|
|
495 | |
|
|
496 | if (msg_is_special (msg) || (type [0] == 'c' && type [1] == '/') || len > (MAXSOCKBUF - 128)) |
|
|
497 | cfperl_send_msg (this, color, type, msg); |
|
|
498 | else if (can_msg) |
|
|
499 | send_packet_printf ("msg %d %s %s", color & NDI_CLIENT_MASK, type, msg); |
|
|
500 | else if (color < 0) |
|
|
501 | return; // client cannot handle this |
|
|
502 | else |
|
|
503 | send_packet_printf ("drawinfo %d %s", color & NDI_COLOR_MASK, msg); |
|
|
504 | } |
|
|
505 | |
|
|
506 | void |
|
|
507 | client::send_drawinfo (const char *msg, int flags) |
|
|
508 | { |
|
|
509 | send_msg (flags, "log", msg); |
|
|
510 | } |
|
|
511 | |
|
|
512 | /*********************************************************************** |
|
|
513 | * |
|
|
514 | * packet functions/utilities |
|
|
515 | * |
|
|
516 | **********************************************************************/ |
|
|
517 | |
|
|
518 | packet::packet (const char *name) |
|
|
519 | { |
|
|
520 | reset (); |
|
|
521 | |
|
|
522 | int len = strlen (name); |
|
|
523 | memcpy (cur, name, len); cur += len; |
|
|
524 | *cur++ = ' '; |
|
|
525 | } |
|
|
526 | |
|
|
527 | packet &packet::operator <<(const ber32 v) |
|
|
528 | { |
|
|
529 | enum { maxlen = 32 / 7 + 1}; |
|
|
530 | uint8 buf[maxlen]; |
|
|
531 | uint8 *p = buf + maxlen; |
|
|
532 | uint32 val = v.val; |
|
|
533 | |
|
|
534 | *--p = val & 0x7F; |
|
|
535 | |
|
|
536 | while (val > 0x7F) |
|
|
537 | { |
|
|
538 | val >>= 7; |
|
|
539 | *--p = (val & 0x7F) | 0x80; |
|
|
540 | } |
|
|
541 | |
|
|
542 | return *this << data (p, buf + maxlen - p); |
|
|
543 | } |
|
|
544 | |
|
|
545 | packet &packet::operator <<(const data &v) |
|
|
546 | { |
|
|
547 | if (room () < v.len) |
|
|
548 | reset (); |
|
|
549 | else |
|
|
550 | { |
|
|
551 | if (v.len) |
|
|
552 | { |
|
|
553 | memcpy (cur, v.ptr, v.len); |
|
|
554 | cur += v.len; |
|
|
555 | } |
|
|
556 | } |
|
|
557 | |
|
|
558 | return *this; |
|
|
559 | } |
|
|
560 | |
|
|
561 | packet &packet::operator <<(const data8 &v) |
|
|
562 | { |
|
|
563 | unsigned int len = min (v.len, 0x00FF); |
|
|
564 | return *this << uint8 (len) << data (v.ptr, len); |
|
|
565 | } |
|
|
566 | |
|
|
567 | packet &packet::operator <<(const data16 &v) |
|
|
568 | { |
|
|
569 | unsigned int len = min (v.len, 0xFFFF); |
|
|
570 | return *this << uint16 (len) << data (v.ptr, len); |
|
|
571 | } |
|
|
572 | |
|
|
573 | packet &packet::operator <<(const char *v) |
|
|
574 | { |
|
|
575 | return *this << data (v, strlen (v ? v : 0)); |
|
|
576 | } |
|
|
577 | |
|
|
578 | void |
|
|
579 | packet::vprintf (const char *format, va_list ap) |
|
|
580 | { |
|
|
581 | int size = room (); |
|
|
582 | |
|
|
583 | int len = vsnprintf ((char *)cur, size, format, ap); |
|
|
584 | |
|
|
585 | if (len >= size) |
|
|
586 | return reset (); |
|
|
587 | |
|
|
588 | cur += len; |
|
|
589 | } |
|
|
590 | |