1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
3 | |
3 | * |
|
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
5 | * Copyright (©) 2002-2003,2007 Mark Wedel & The Crossfire Development Team |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | |
7 | * |
7 | This program is free software; you can redistribute it and/or modify |
8 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
8 | it under the terms of the GNU General Public License as published by |
9 | * under the terms of the GNU General Public License as published by the Free |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | * Software Foundation; either version 2 of the License, or (at your option) |
10 | (at your option) any later version. |
11 | * any later version. |
11 | |
12 | * |
12 | This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, but |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
15 | GNU General Public License for more details. |
16 | * for more details. |
16 | |
17 | * |
17 | You should have received a copy of the GNU General Public License |
18 | * You should have received a copy of the GNU General Public License along |
18 | along with this program; if not, write to the Free Software |
19 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | |
21 | * |
21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
22 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
23 | */ |
23 | |
24 | |
24 | /** |
25 | /** |
25 | * \file |
26 | * \file |
26 | * Main client/server loops. |
27 | * Main client/server loops. |
27 | * |
28 | * |
28 | * \date 2003-12-02 |
29 | * \date 2003-12-02 |
29 | * |
30 | * |
30 | * loop.c mainly deals with initialization and higher level socket |
31 | * loop.c mainly deals with initialization and higher level socket |
31 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * maintanance (checking for lost connections and if data has arrived.) |
32 | * The reading of data is handled in ericserver.c |
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33 | */ |
33 | */ |
34 | |
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35 | |
34 | |
36 | #include <global.h> |
35 | #include <global.h> |
37 | #include <sproto.h> |
36 | #include <sproto.h> |
38 | #include <sockproto.h> |
37 | #include <sockproto.h> |
39 | |
38 | |
… | |
… | |
46 | #include <unistd.h> |
45 | #include <unistd.h> |
47 | #include <arpa/inet.h> |
46 | #include <arpa/inet.h> |
48 | |
47 | |
49 | #include <loader.h> |
48 | #include <loader.h> |
50 | |
49 | |
51 | /***************************************************************************** |
50 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
52 | * Start of command dispatch area. |
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53 | * The commands here are protocol commands. |
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54 | ****************************************************************************/ |
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55 | |
51 | |
56 | /* Either keep this near the start or end of the file so it is |
52 | #define MAX_QUEUE_DEPTH 500 |
57 | * at least reasonablye easy to find. |
53 | #define MAX_QUEUE_BACKLOG 3. |
58 | * There are really 2 commands - those which are sent/received |
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59 | * before player joins, and those happen after the player has joined. |
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60 | * As such, we have function types that might be called, so |
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61 | * we end up having 2 tables. |
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62 | */ |
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63 | |
54 | |
64 | enum { |
55 | void |
65 | PF_PLAYER = 0x01, // must have valid player |
56 | client::reset_state () |
66 | PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately |
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67 | PF_PLAYING = 0x04, // must be in playing state |
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68 | }; |
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69 | |
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70 | struct pkt_type |
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71 | { |
57 | { |
72 | const char *name; |
58 | if (!pl) |
73 | void *cb; |
59 | return; |
74 | int flags; |
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75 | |
60 | |
76 | bool may_execute (client *ns) |
61 | pl->run_on = 0; |
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62 | pl->fire_on = 0; |
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63 | } |
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64 | |
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65 | void |
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66 | client::queue_command (packet_type *handler, char *data, int datalen) |
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67 | { |
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68 | tstamp stamp = NOW; |
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69 | |
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70 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
77 | { |
71 | { |
78 | return (!(flags & PF_PLAYER) || ns->pl) |
72 | //TODO: just disconnect here? |
79 | && (!(flags & PF_PLAYING) || (ns->pl && ns->pl->state == ST_PLAYING)); |
73 | reset_state (); |
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74 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
80 | } |
75 | } |
81 | |
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82 | void execute (client *ns, char *data, int datalen) |
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83 | { |
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84 | //TODO: only one format |
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85 | if (flags & PF_PLAYER) |
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86 | ((void (*)(char *, int, player * ))cb)((char *)data, datalen, ns->pl); |
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87 | else |
76 | else |
88 | ((void (*)(char *, int, client *))cb)((char *)data, datalen, ns); |
77 | { |
89 | } |
78 | cmd_queue.push_back (command ()); |
90 | }; |
79 | command &cmd = cmd_queue.back (); |
91 | |
80 | cmd.stamp = stamp; |
92 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
81 | cmd.handler = handler; |
93 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client *)>(cb), |
82 | cmd.data = salloc<char> (datalen + 1, data); |
94 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
83 | cmd.datalen = datalen; |
95 | |
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96 | /** |
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97 | * Dispatch table for the server. |
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98 | */ |
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99 | static struct pkt_type packets[] = { |
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100 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
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101 | {"command", PC(PlayerCmd) PF_PLAYING }, |
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102 | |
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103 | {"examine", PC(ExamineCmd) PF_PLAYING | PF_IMMEDIATE }, |
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104 | {"apply", PC(ApplyCmd) PF_PLAYING | PF_IMMEDIATE }, |
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105 | {"reply", PC(ReplyCmd) PF_IMMEDIATE }, |
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106 | {"lookat", PC(LookAt) PF_PLAYING | PF_IMMEDIATE }, |
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107 | {"lock", PC(LockItem) PF_PLAYING | PF_IMMEDIATE }, |
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108 | {"mark", PC(MarkItem) PF_PLAYING | PF_IMMEDIATE }, |
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109 | {"move", PC(MoveCmd) PF_PLAYING | PF_IMMEDIATE }, |
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110 | {"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */ |
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111 | {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */ |
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112 | {"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */ |
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113 | |
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114 | {"addme", SC(AddMeCmd) PF_IMMEDIATE }, |
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115 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
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116 | {"requestinfo", SC(RequestInfo) 0 }, |
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117 | {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE }, |
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118 | {"setsound", SC(SetSound) PF_IMMEDIATE }, |
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119 | {"setup", SC(SetUp) PF_IMMEDIATE }, |
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120 | {"version", SC(VersionCmd) PF_IMMEDIATE }, |
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121 | {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */ |
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122 | {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */ |
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123 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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124 | }; |
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125 | |
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126 | /** |
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127 | * Handle client input. |
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128 | * |
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129 | * HandleClient is actually not named really well - we only get here once |
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130 | * there is input, so we don't do exception or other stuff here. |
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131 | * sock is the output socket information. pl is the player associated |
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132 | * with this socket, null if no player (one of the init_sockets for just |
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133 | * starting a connection) |
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134 | */ |
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135 | void |
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136 | HandleClient (client *ns, player *pl) |
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137 | { |
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138 | /* Loop through this - maybe we have several complete packets here. */ |
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139 | // limit to a few commands only, though, as to not monopolise the server |
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140 | for (int repeat = 16; repeat--;) |
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141 | { |
84 | } |
142 | /* If it is a player, and they don't have any speed left, we |
85 | } |
143 | * return, and will read in the data when they do have time. |
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144 | */ |
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145 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
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146 | return; |
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147 | |
86 | |
148 | int pkt_len = ns->read_packet (); |
87 | bool |
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88 | client::handle_command () |
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89 | { |
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90 | if (!cmd_queue.empty () |
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91 | && state == ST_PLAYING |
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92 | && pl->ob->speed_left > 0.f) |
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93 | { |
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94 | command &cmd = cmd_queue.front (); |
149 | |
95 | |
150 | if (pkt_len < 0) |
96 | if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
151 | { |
97 | { |
152 | LOG (llevError, "read error on player %s\n", &pl->ob->name); |
98 | reset_state (); |
153 | /* Caller will take care of cleaning this up */ |
99 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
154 | ns->status = Ns_Dead; |
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155 | return; |
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156 | } |
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157 | else if (pkt_len == 0) |
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158 | /* Still dont have a full packet */ |
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159 | return; |
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160 | |
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161 | /* First, break out beginning word. There are at least |
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162 | * a few commands that do not have any paremeters. If |
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163 | * we get such a command, don't worry about trying |
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164 | * to break it up. |
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165 | */ |
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166 | int datalen; |
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167 | char *data = strchr ((char *)ns->inbuf + 2, ' '); |
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168 | |
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169 | if (data) |
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170 | { |
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171 | *data++ = 0; |
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172 | datalen = pkt_len - (data - (char *)ns->inbuf); |
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173 | } |
100 | } |
174 | else |
101 | else |
175 | { |
102 | execute (cmd.handler, cmd.data, cmd.datalen); |
176 | data = (char *)ns->inbuf + 2; // better read garbage than segfault |
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177 | datalen = 0; |
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178 | } |
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179 | |
103 | |
180 | ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
104 | cmd_queue.pop_front (); |
181 | |
105 | return true; |
182 | for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
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183 | if (!strcmp ((char *)ns->inbuf + 2, pkt->name)) |
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184 | { |
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185 | if (pkt->may_execute (ns)) |
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186 | { |
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187 | pkt->execute (ns, data, datalen); |
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188 | ns->skip_packet (pkt_len); |
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189 | //D//TODO not doing this causes random memory corruption |
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190 | if (pkt->flags & PF_IMMEDIATE) |
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191 | goto next_packet; |
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192 | return; |
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193 | } |
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194 | } |
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195 | |
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196 | /* If we get here, we didn't find a valid command. Logging |
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197 | * this might be questionable, because a broken client/malicious |
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198 | * user could certainly send a whole bunch of invalid commands. |
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199 | */ |
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200 | LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2); |
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201 | ns->skip_packet (pkt_len); |
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202 | next_packet: |
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203 | ; |
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204 | } |
106 | } |
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107 | else |
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108 | return false; |
205 | } |
109 | } |
206 | |
110 | |
207 | void |
111 | void |
208 | flush_sockets (void) |
112 | flush_sockets (void) |
209 | { |
113 | { |
210 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
114 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
211 | if ((*i)->status != Ns_Dead) |
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212 | (*i)->flush (); |
115 | (*i)->flush (); |
213 | } |
116 | } |
214 | |
117 | |
215 | /** |
118 | /** |
216 | * This checks the sockets for input, does the right thing. |
119 | * This checks the sockets for input, does the right thing. |
217 | * |
120 | * |
… | |
… | |
220 | * |
123 | * |
221 | */ |
124 | */ |
222 | void |
125 | void |
223 | doeric_server (void) |
126 | doeric_server (void) |
224 | { |
127 | { |
225 | int i, pollret; |
128 | //TODO: should not be done here, either |
226 | fd_set tmp_read; |
129 | for (unsigned i = 0; i < clients.size (); ++i) |
227 | struct sockaddr_in addr; |
130 | { |
228 | socklen_t addrlen = sizeof (struct sockaddr); |
131 | client *ns = clients [i]; |
229 | player *pl, *next; |
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230 | int maxfd = 0; |
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231 | |
132 | |
232 | #ifdef CS_LOGSTATS |
133 | ns->tick (); |
233 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
134 | ns->refcnt_chk (); |
234 | write_cs_stats (); |
135 | } |
235 | #endif |
136 | } |
236 | |
137 | |
237 | /* Go through the players. Let the loop set the next pl value, |
138 | void |
238 | * since we may remove some |
139 | client::tick () |
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140 | { |
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141 | if (!pl || destroyed ()) |
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142 | return; |
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143 | |
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144 | /* Update the players stats once per tick. More efficient than |
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145 | * sending them whenever they change, and probably just as useful |
239 | */ |
146 | */ |
240 | //TODO: must be handled cleanly elsewhere |
147 | esrv_update_stats (pl); |
241 | for (pl = first_player; pl; ) |
148 | |
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149 | if (last_weight != -1 && last_weight != WEIGHT (pl->ob)) |
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150 | { |
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151 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
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152 | if (last_weight != WEIGHT (pl->ob)) |
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153 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
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154 | (unsigned long) last_weight, WEIGHT (pl->ob)); |
242 | { |
155 | } |
243 | player *npl = pl->next; |
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244 | |
156 | |
245 | //TODO: must be handled cleanly elsewhere |
157 | draw_client_map (pl); |
246 | if (pl->socket->status == Ns_Dead) |
158 | |
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159 | if (update_look) |
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160 | esrv_draw_look (pl); |
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161 | |
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162 | if (ixface.empty () && !partial_face_ofs) |
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163 | { |
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164 | // regularly send a new face when queue is empty |
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165 | if (bg_scrub && !--bg_scrub && enable_bg_scrub) |
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166 | while (scrub_idx < faces.size () - 1) |
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167 | { |
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168 | ++scrub_idx; |
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169 | if (!faces_sent [scrub_idx]) |
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170 | { |
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171 | send_face (scrub_idx); |
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172 | flush_fx (); |
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173 | |
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174 | bg_scrub = 1; // send up to one face per tick, unless an image was requested |
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175 | break; |
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176 | } |
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177 | } |
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178 | |
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179 | rate_avail = max_rate - outputbuffer_len (); |
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180 | } |
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181 | else |
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182 | { |
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183 | int ol = outputbuffer_len (); |
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184 | |
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185 | rate_avail = min (max_rate, rate_avail + max_rate); |
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186 | rate_avail -= ol; |
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187 | |
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188 | int avail = rate_avail; |
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189 | |
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190 | // if we can split images, transfer up to mss-sized packets if possible |
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191 | // but never 768 bytes more. |
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192 | if (fxix) avail += min (768, mss - (ol % mss)); |
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193 | |
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194 | bg_scrub = BG_SCRUB_RATE; |
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195 | |
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196 | while (avail > 0) |
247 | { |
197 | { |
248 | save_player (pl->ob, 0); |
198 | if (partial_face_ofs) |
249 | |
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250 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
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251 | { |
199 | { |
252 | terminate_all_pets (pl->ob); |
200 | if (facedata *d = face_data (partial_face, faceset)) |
253 | pl->ob->remove (); |
201 | { |
|
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202 | // 9 bytes is enough for fx_FFFOOO, 40 leaves some room for image data |
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203 | int chunk = min (min (avail - 40, MAXSOCKBUF - 9), partial_face_ofs); |
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204 | |
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205 | if (chunk <= 0) |
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206 | break; |
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207 | |
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208 | partial_face_ofs -= chunk; |
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209 | |
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210 | packet sl ("ix"); |
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211 | |
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212 | sl << ber32 (partial_face) |
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213 | << ber32 (partial_face_ofs) |
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214 | << data (d->data.data () + partial_face_ofs, chunk); |
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215 | |
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216 | send_packet (sl); |
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217 | } |
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218 | else |
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219 | partial_face_ofs = 0; |
254 | } |
220 | } |
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221 | else if (!ixface.empty ()) |
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222 | { |
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223 | // use a lifo to send most recently requested images |
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224 | faceidx facenum = ixface.back (); |
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225 | ixface.pop_back (); |
255 | |
226 | |
256 | leave (pl, 1); |
227 | if (fxix) |
257 | final_free_player (pl); |
228 | { |
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229 | if (facedata *d = face_data (facenum, faceset)) |
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230 | { |
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231 | partial_face = facenum; |
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232 | partial_face_ofs = d->data.size (); |
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233 | } |
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234 | } |
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235 | else |
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236 | send_image (facenum); |
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237 | } |
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238 | else |
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239 | break; |
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240 | |
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241 | int consumed = ol - outputbuffer_len (); |
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242 | avail -= consumed; |
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243 | rate_avail -= consumed; |
258 | } |
244 | } |
259 | |
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260 | pl = npl; |
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261 | } |
|
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262 | |
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263 | FD_ZERO (&tmp_read); |
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264 | |
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265 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ) |
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266 | { |
245 | } |
267 | client *s = *i; |
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268 | |
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269 | if (s->status == Ns_Dead) |
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270 | { |
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271 | clients.erase (i); |
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272 | delete s; |
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273 | } |
|
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274 | else |
|
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275 | { |
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276 | if (s->fd > maxfd) maxfd = s->fd; |
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277 | |
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278 | FD_SET (s->fd, &tmp_read); |
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279 | |
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280 | ++i; |
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281 | } |
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282 | } |
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283 | |
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284 | struct timeval timeout; |
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285 | |
|
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286 | timeout.tv_sec = 0; |
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287 | timeout.tv_usec = 0; |
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288 | |
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289 | pollret = select (maxfd + 1, |
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290 | &tmp_read, 0, 0, |
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291 | &timeout); |
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292 | |
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293 | if (pollret == -1) |
|
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294 | { |
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295 | LOG (llevError, "select failed: %s\n", strerror (errno)); |
|
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296 | return; |
|
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297 | } |
|
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298 | |
|
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299 | /* We need to do some of the processing below regardless */ |
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300 | |
|
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301 | /* Check for any input on the sockets */ |
|
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302 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
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303 | { |
|
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304 | client *s = *i; |
|
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305 | player *pl = s->pl; |
|
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306 | |
|
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307 | //TODO: disassociate handleclient from socket readin |
|
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308 | if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read)) |
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309 | HandleClient (s, pl); |
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310 | |
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311 | //TODO: should not be done here, either |
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312 | if (s->status != Ns_Dead && pl) |
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313 | { |
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314 | /* Update the players stats once per tick. More efficient than |
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315 | * sending them whenever they change, and probably just as useful |
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316 | */ |
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317 | esrv_update_stats (pl); |
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318 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
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319 | { |
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320 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
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321 | if (pl->last_weight != WEIGHT (pl->ob)) |
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322 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
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323 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
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324 | } |
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325 | |
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326 | /* draw_client_map does sanity checking that map is |
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327 | * valid, so don't do it here. |
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328 | */ |
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329 | draw_client_map (pl->ob); |
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330 | if (s->update_look) |
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331 | esrv_draw_look (pl->ob); |
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332 | } |
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333 | } |
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334 | } |
246 | } |
335 | |
247 | |