1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
3 | |
3 | |
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4 | Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
5 | Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | Copyright (C) 1992 Frank Tore Johansen |
6 | |
7 | |
7 | This program is free software; you can redistribute it and/or modify |
8 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
9 | it under the terms of the GNU General Public License as published by |
… | |
… | |
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 | |
34 | |
35 | |
35 | |
36 | #include <global.h> |
36 | #include <global.h> |
37 | #include <sproto.h> |
37 | #include <sproto.h> |
… | |
… | |
45 | |
45 | |
46 | #include <unistd.h> |
46 | #include <unistd.h> |
47 | #include <arpa/inet.h> |
47 | #include <arpa/inet.h> |
48 | |
48 | |
49 | #include <loader.h> |
49 | #include <loader.h> |
50 | #include <newserver.h> |
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51 | |
50 | |
52 | /***************************************************************************** |
51 | #define MAX_QUEUE_DEPTH 500 //TODO |
53 | * Start of command dispatch area. |
52 | #define MAX_QUEUE_BACKLOG 3. //TODO |
54 | * The commands here are protocol commands. |
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55 | ****************************************************************************/ |
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56 | |
53 | |
57 | /* Either keep this near the start or end of the file so it is |
54 | void |
58 | * at least reasonablye easy to find. |
55 | client::reset_state () |
59 | * There are really 2 commands - those which are sent/received |
56 | { |
60 | * before player joins, and those happen after the player has joined. |
57 | if (!pl) |
61 | * As such, we have function types that might be called, so |
58 | return; |
62 | * we end up having 2 tables. |
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63 | */ |
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64 | |
59 | |
65 | enum { |
60 | pl->run_on = 0; |
66 | PF_PLAYER = 0x01, // must have valid player |
61 | pl->fire_on = 0; |
67 | PF_IMMEDIATE = 0x02, // TODO: hack, can be executed immediately |
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68 | PF_PLAYING = 0x04, // must be in playing state |
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69 | }; |
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70 | |
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71 | struct pkt_type |
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72 | { |
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73 | const char *name; |
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74 | void *cb; |
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75 | int flags; |
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76 | |
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77 | bool may_execute (client_socket *ns) |
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78 | { |
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79 | return (!(flags & PF_PLAYER) || ns->pl) |
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80 | && (!(flags & PF_PLAYING) || (ns->pl && ns->pl->state == ST_PLAYING)); |
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81 | } |
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82 | |
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83 | void execute (client_socket *ns, char *data, int datalen) |
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84 | { |
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85 | //TODO: only one format |
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86 | if (flags & PF_PLAYER) |
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87 | ((void (*)(char *, int, player * ))cb)((char *)data, datalen, ns->pl); |
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88 | else |
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89 | ((void (*)(char *, int, client_socket *))cb)((char *)data, datalen, ns); |
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90 | } |
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91 | }; |
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92 | |
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93 | // SocketCommand, PlayingCommand, should not exist with those ugly casts |
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94 | #define SC(cb) (void *)static_cast<void (*)(char *, int, client_socket *)>(cb), |
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95 | #define PC(cb) (void *)static_cast<void (*)(char *, int, player *)>(cb), PF_PLAYER | |
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96 | |
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97 | /** |
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98 | * Dispatch table for the server. |
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99 | */ |
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100 | static struct pkt_type packets[] = { |
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101 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
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102 | {"command", PC(PlayerCmd) PF_PLAYING }, |
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103 | |
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104 | {"examine", PC(ExamineCmd) PF_PLAYING | PF_IMMEDIATE }, |
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105 | {"apply", PC(ApplyCmd) PF_PLAYING | PF_IMMEDIATE }, |
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106 | {"reply", PC(ReplyCmd) PF_IMMEDIATE }, |
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107 | {"lookat", PC(LookAt) PF_PLAYING | PF_IMMEDIATE }, |
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108 | {"lock", PC(LockItem) PF_PLAYING | PF_IMMEDIATE }, |
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109 | {"mark", PC(MarkItem) PF_PLAYING | PF_IMMEDIATE }, |
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110 | {"move", PC(MoveCmd) PF_PLAYING | PF_IMMEDIATE }, |
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111 | {"ext", PC(ExtCmd) PF_IMMEDIATE }, /* CF+ */ |
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112 | {"mapredraw", PC(MapRedrawCmd) PF_IMMEDIATE }, /* Added: phil */ |
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113 | {"mapinfo", PC(MapInfoCmd) PF_IMMEDIATE }, /* CF+ */ |
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114 | |
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115 | {"addme", SC(AddMeCmd) PF_IMMEDIATE }, |
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116 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
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117 | {"requestinfo", SC(RequestInfo) 0 }, |
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118 | {"setfacemode", SC(SetFaceMode) PF_IMMEDIATE }, |
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119 | {"setsound", SC(SetSound) PF_IMMEDIATE }, |
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120 | {"setup", SC(SetUp) PF_IMMEDIATE }, |
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121 | {"version", SC(VersionCmd) PF_IMMEDIATE }, |
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122 | {"toggleextendedinfos", SC(ToggleExtendedInfos) PF_IMMEDIATE }, /*Added: tchize */ |
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123 | {"toggleextendedtext", SC(ToggleExtendedText) PF_IMMEDIATE }, /*Added: tchize */ |
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124 | {"asksmooth", SC(AskSmooth) 0 }, /*Added: tchize (smoothing technologies) */ |
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125 | }; |
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126 | |
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127 | /** |
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128 | * RequestInfo is sort of a meta command. There is some specific |
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129 | * request of information, but we call other functions to provide |
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130 | * that information. |
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131 | */ |
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132 | void |
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133 | RequestInfo (char *buf, int len, client_socket * ns) |
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134 | { |
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135 | char *params = NULL, *cp; |
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136 | |
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137 | /* No match */ |
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138 | char bigbuf[MAX_BUF]; |
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139 | int slen; |
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140 | |
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141 | /* Set up replyinfo before we modify any of the buffers - this is used |
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142 | * if we don't find a match. |
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143 | */ |
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144 | strcpy (bigbuf, "replyinfo "); |
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145 | slen = strlen (bigbuf); |
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146 | safe_strcat (bigbuf, buf, &slen, MAX_BUF); |
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147 | |
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148 | /* find the first space, make it null, and update the |
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149 | * params pointer. |
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150 | */ |
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151 | for (cp = buf; *cp != '\0'; cp++) |
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152 | if (*cp == ' ') |
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153 | { |
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154 | *cp = '\0'; |
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155 | params = cp + 1; |
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156 | break; |
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157 | } |
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158 | |
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159 | if (!strcmp (buf, "image_info")) |
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160 | send_image_info (ns, params); |
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161 | else if (!strcmp (buf, "image_sums")) |
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162 | send_image_sums (ns, params); |
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163 | else if (!strcmp (buf, "skill_info")) |
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164 | send_skill_info (ns, params); |
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165 | else if (!strcmp (buf, "spell_paths")) |
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166 | send_spell_paths (ns, params); |
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167 | else |
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168 | ns->send_packet (bigbuf, len); |
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169 | } |
62 | } |
170 | |
63 | |
171 | /** |
64 | void |
172 | * Handle client input. |
65 | client::queue_command (packet_type *handler, char *data, int datalen) |
173 | * |
66 | { |
174 | * HandleClient is actually not named really well - we only get here once |
67 | tstamp stamp = now (); |
175 | * there is input, so we don't do exception or other stuff here. |
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176 | * sock is the output socket information. pl is the player associated |
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177 | * with this socket, null if no player (one of the init_sockets for just |
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178 | * starting a connection) |
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179 | */ |
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180 | |
68 | |
181 | void |
69 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
182 | HandleClient (client_socket *ns, player *pl) |
70 | { |
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71 | //TODO: just disconnect here? |
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72 | reset_state (); |
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73 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
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74 | } |
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75 | else |
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76 | { |
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77 | cmd_queue.push_back (command ()); |
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78 | command &cmd = cmd_queue.back (); |
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79 | cmd.stamp = stamp; |
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80 | cmd.handler = handler; |
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81 | cmd.data = salloc<char> (datalen + 1, data); |
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82 | cmd.datalen = datalen; |
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83 | } |
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84 | } |
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85 | |
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86 | bool |
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87 | client::handle_command () |
183 | { |
88 | { |
184 | /* Loop through this - maybe we have several complete packets here. */ |
89 | bool skipping = false; |
185 | // limit to a few commands only, though, as to not monopolise the server |
90 | |
186 | for (int repeat = 16; repeat--;) |
91 | while (!cmd_queue.empty () |
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92 | && !(state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)) |
187 | { |
93 | { |
188 | /* If it is a player, and they don't have any speed left, we |
94 | command &cmd = cmd_queue.front (); |
189 | * return, and will read in the data when they do have time. |
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190 | */ |
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191 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
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192 | return; |
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193 | |
95 | |
194 | int pkt_len = ns->read_packet (); |
96 | if (cmd.stamp + MAX_QUEUE_BACKLOG < now ()) |
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97 | { |
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98 | if (!skipping) |
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99 | { |
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100 | skipping = true; |
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101 | reset_state (); |
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102 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
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103 | } |
195 | |
104 | |
196 | if (pkt_len < 0) |
105 | cmd_queue.pop_front (); |
197 | { |
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198 | LOG (llevError, "read error on player %s\n", &pl->ob->name); |
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199 | /* Caller will take care of cleaning this up */ |
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200 | ns->status = Ns_Dead; |
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201 | return; |
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202 | } |
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203 | else if (pkt_len == 0) |
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204 | /* Still dont have a full packet */ |
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205 | return; |
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206 | |
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207 | /* First, break out beginning word. There are at least |
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208 | * a few commands that do not have any paremeters. If |
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209 | * we get such a command, don't worry about trying |
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210 | * to break it up. |
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211 | */ |
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212 | int datalen; |
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213 | char *data = strchr ((char *)ns->inbuf + 2, ' '); |
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214 | |
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215 | if (data) |
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216 | { |
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217 | *data++ = 0; |
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218 | datalen = pkt_len - (data - (char *)ns->inbuf); |
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219 | } |
106 | } |
220 | else |
107 | else |
221 | { |
108 | { |
222 | data = (char *)ns->inbuf + 2; // better read garbage than segfault |
109 | execute (cmd.handler, cmd.data, cmd.datalen); |
223 | datalen = 0; |
110 | cmd_queue.pop_front (); |
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111 | return true; |
224 | } |
112 | } |
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113 | } |
225 | |
114 | |
226 | ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
115 | return false; |
227 | |
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228 | for (pkt_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
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229 | if (!strcmp ((char *)ns->inbuf + 2, pkt->name)) |
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230 | { |
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231 | if (pkt->may_execute (ns)) |
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232 | { |
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233 | pkt->execute (ns, data, datalen); |
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234 | ns->skip_packet (pkt_len); |
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235 | //D//TODO not doing this causes random memory corruption |
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236 | if (pkt->flags & PF_IMMEDIATE) |
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237 | goto next_packet; |
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238 | return; |
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239 | } |
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240 | } |
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241 | |
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242 | /* If we get here, we didn't find a valid command. Logging |
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243 | * this might be questionable, because a broken client/malicious |
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244 | * user could certainly send a whole bunch of invalid commands. |
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245 | */ |
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246 | LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2); |
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247 | ns->skip_packet (pkt_len); |
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248 | next_packet: |
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249 | ; |
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250 | } |
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251 | } |
116 | } |
252 | |
117 | |
253 | void |
118 | void |
254 | flush_sockets (void) |
119 | flush_sockets (void) |
255 | { |
120 | { |
256 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) |
121 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
257 | if ((*i)->status != Ns_Dead) |
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258 | (*i)->flush (); |
122 | (*i)->flush (); |
259 | } |
123 | } |
260 | |
124 | |
261 | /** |
125 | /** |
262 | * This checks the sockets for input, does the right thing. |
126 | * This checks the sockets for input, does the right thing. |
263 | * |
127 | * |
… | |
… | |
266 | * |
130 | * |
267 | */ |
131 | */ |
268 | void |
132 | void |
269 | doeric_server (void) |
133 | doeric_server (void) |
270 | { |
134 | { |
271 | int i, pollret; |
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272 | fd_set tmp_read; |
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273 | struct sockaddr_in addr; |
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274 | socklen_t addrlen = sizeof (struct sockaddr); |
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275 | player *pl, *next; |
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276 | int maxfd = 0; |
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277 | |
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278 | #ifdef CS_LOGSTATS |
135 | #ifdef CS_LOGSTATS |
279 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
136 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
280 | write_cs_stats (); |
137 | write_cs_stats (); |
281 | #endif |
138 | #endif |
282 | |
139 | |
283 | /* Go through the players. Let the loop set the next pl value, |
140 | //TODO: should not be done here, either |
284 | * since we may remove some |
141 | for (int i = 0; i < clients.size (); ++i) |
285 | */ |
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286 | //TODO: must be handled cleanly elsewhere |
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287 | for (pl = first_player; pl; ) |
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288 | { |
142 | { |
289 | player *npl = pl->next; |
143 | client *s = clients [i]; |
290 | |
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291 | //TODO: must be handled cleanly elsewhere |
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292 | if (pl->socket->status == Ns_Dead) |
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293 | { |
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294 | save_player (pl->ob, 0); |
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295 | |
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296 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
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297 | { |
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298 | terminate_all_pets (pl->ob); |
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299 | pl->ob->remove (); |
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300 | } |
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301 | |
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302 | leave (pl, 1); |
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303 | final_free_player (pl); |
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304 | } |
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305 | |
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306 | pl = npl; |
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307 | } |
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308 | |
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309 | FD_ZERO (&tmp_read); |
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310 | |
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311 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ) |
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312 | { |
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313 | client_socket *s = *i; |
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314 | |
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315 | if (s->status == Ns_Dead) |
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316 | { |
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317 | client_sockets.erase (i); |
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318 | delete s; |
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319 | } |
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320 | else |
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321 | { |
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322 | if (s->fd > maxfd) maxfd = s->fd; |
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323 | |
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324 | FD_SET (s->fd, &tmp_read); |
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325 | |
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326 | ++i; |
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327 | } |
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328 | } |
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329 | |
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330 | struct timeval timeout; |
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331 | |
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332 | timeout.tv_sec = 0; |
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333 | timeout.tv_usec = 0; |
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334 | |
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335 | pollret = select (maxfd + 1, |
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336 | &tmp_read, 0, 0, |
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337 | &timeout); |
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338 | |
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339 | if (pollret == -1) |
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340 | { |
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341 | LOG (llevError, "select failed: %s\n", strerror (errno)); |
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342 | return; |
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343 | } |
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344 | |
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345 | /* We need to do some of the processing below regardless */ |
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346 | |
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347 | /* Check for any input on the sockets */ |
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348 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) |
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349 | { |
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350 | client_socket *s = *i; |
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351 | player *pl = s->pl; |
144 | player *pl = s->pl; |
352 | |
145 | |
353 | //TODO: disassociate handleclient from socket readin |
146 | if (pl && pl->ns && !pl->ns->destroyed ()) |
354 | if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read)) |
147 | { |
355 | HandleClient (s, pl); |
148 | client *ns = pl->ns; |
356 | |
149 | |
357 | //TODO: should not be done here, either |
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358 | if (s->status != Ns_Dead && pl) |
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359 | { |
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360 | /* Update the players stats once per tick. More efficient than |
150 | /* Update the players stats once per tick. More efficient than |
361 | * sending them whenever they change, and probably just as useful |
151 | * sending them whenever they change, and probably just as useful |
362 | */ |
152 | */ |
363 | esrv_update_stats (pl); |
153 | esrv_update_stats (pl); |
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154 | |
364 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
155 | if (ns->last_weight != -1 && ns->last_weight != WEIGHT (pl->ob)) |
365 | { |
156 | { |
366 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
157 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
367 | if (pl->last_weight != WEIGHT (pl->ob)) |
158 | if (ns->last_weight != WEIGHT (pl->ob)) |
368 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
159 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
369 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
160 | (unsigned long) ns->last_weight, WEIGHT (pl->ob)); |
370 | } |
161 | } |
371 | |
162 | |
372 | /* draw_client_map does sanity checking that map is |
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373 | * valid, so don't do it here. |
|
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374 | */ |
|
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375 | draw_client_map (pl->ob); |
163 | draw_client_map (pl->ob); |
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164 | |
376 | if (s->update_look) |
165 | if (s->update_look) |
377 | esrv_draw_look (pl->ob); |
166 | esrv_draw_look (pl->ob); |
378 | } |
167 | } |
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168 | |
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169 | s->refcnt_chk (); |
379 | } |
170 | } |
380 | } |
171 | } |
381 | |
172 | |