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26 | * Main client/server loops. |
26 | * Main client/server loops. |
27 | * |
27 | * |
28 | * \date 2003-12-02 |
28 | * \date 2003-12-02 |
29 | * |
29 | * |
30 | * loop.c mainly deals with initialization and higher level socket |
30 | * loop.c mainly deals with initialization and higher level socket |
31 | * maintenance (checking for lost connections and if data has arrived.) |
31 | * 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 | */ |
32 | */ |
34 | |
33 | |
35 | |
34 | |
36 | #include <global.h> |
35 | #include <global.h> |
37 | #include <sproto.h> |
36 | #include <sproto.h> |
… | |
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45 | |
44 | |
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 | #include <newserver.h> |
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51 | |
49 | |
52 | /***************************************************************************** |
50 | #define MAX_QUEUE_DEPTH 500 //TODO |
53 | * Start of command dispatch area. |
51 | #define MAX_QUEUE_BACKLOG 5. //TODO |
54 | * The commands here are protocol commands. |
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55 | ****************************************************************************/ |
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56 | |
52 | |
57 | /* Either keep this near the start or end of the file so it is |
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58 | * at least reasonablye easy to find. |
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59 | * There are really 2 commands - those which are sent/received |
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60 | * before player joins, and those happen after the player has joined. |
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61 | * As such, we have function types that might be called, so |
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62 | * we end up having 2 tables. |
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63 | */ |
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64 | |
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65 | typedef void (*func_uint8_int_ns) (char *, int, client_socket *); |
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66 | |
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67 | struct NsCmdMapping |
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68 | { |
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69 | const char *cmdname; |
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70 | func_uint8_int_ns cmdproc; |
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71 | uint8 flag; |
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72 | }; |
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73 | |
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74 | typedef void (*func_uint8_int_pl) (char *, int, player *); |
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75 | struct PlCmdMapping |
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76 | { |
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77 | const char *cmdname; |
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78 | func_uint8_int_pl cmdproc; |
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79 | uint8 flag; |
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80 | }; |
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81 | |
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82 | /** |
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83 | * Dispatch table for the server. |
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84 | * |
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85 | * CmdMapping is the dispatch table for the server, used in HandleClient, |
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86 | * which gets called when the client has input. All commands called here |
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87 | * use the same parameter form (char* data, int len, int clientnum. |
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88 | * We do implicit casts, because the data that is being passed is |
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89 | * unsigned (pretty much needs to be for binary data), however, most |
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90 | * of these treat it only as strings, so it makes things easier |
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91 | * to cast it here instead of a bunch of times in the function itself. |
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92 | * flag is 1 if the player must be in the playing state to issue the |
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93 | * command, 0 if they can issue it at any time. |
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94 | */ |
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95 | static struct PlCmdMapping plcommands[] = { |
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96 | {"examine", ExamineCmd, 1}, |
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97 | {"apply", ApplyCmd, 1}, |
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98 | {"move", MoveCmd, 1}, |
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99 | {"reply", ReplyCmd, 0}, |
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100 | {"command", PlayerCmd, 1}, |
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101 | {"ncom", (func_uint8_int_pl) NewPlayerCmd, 1}, |
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102 | {"lookat", LookAt, 1}, |
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103 | {"lock", (func_uint8_int_pl) LockItem, 1}, |
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104 | {"mark", (func_uint8_int_pl) MarkItem, 1}, |
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105 | {"mapredraw", MapRedrawCmd, 0}, /* Added: phil */ |
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106 | {"mapinfo", MapInfoCmd, 2}, /* CF+ */ |
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107 | {"ext", ExtCmd, 2}, /* CF+ */ |
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108 | { 0 } /* terminator */ |
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109 | }; |
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110 | |
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111 | /** Face-related commands */ |
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112 | static struct NsCmdMapping nscommands[] = { |
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113 | {"addme", AddMeCmd, 2}, |
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114 | {"askface", SendFaceCmd}, /* Added: phil */ |
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115 | {"requestinfo", RequestInfo}, |
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116 | {"setfacemode", SetFaceMode, 2}, |
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117 | {"setsound", SetSound, 2}, |
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118 | {"setup", SetUp, 2}, |
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119 | {"version", VersionCmd, 2}, |
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120 | {"toggleextendedinfos", ToggleExtendedInfos, 2}, /*Added: tchize */ |
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121 | {"toggleextendedtext", ToggleExtendedText, 2}, /*Added: tchize */ |
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122 | {"asksmooth", AskSmooth}, /*Added: tchize (smoothing technologies) */ |
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123 | { 0 } /* terminator (I, II & III) */ |
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124 | }; |
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125 | |
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126 | /** |
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127 | * RequestInfo is sort of a meta command. There is some specific |
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128 | * request of information, but we call other functions to provide |
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129 | * that information. |
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130 | */ |
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131 | void |
53 | void |
132 | RequestInfo (char *buf, int len, client_socket * ns) |
54 | client::reset_state () |
133 | { |
55 | { |
134 | char *params = NULL, *cp; |
56 | if (!pl) |
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57 | return; |
135 | |
58 | |
136 | /* No match */ |
59 | pl->run_on = 0; |
137 | char bigbuf[MAX_BUF]; |
60 | pl->fire_on = 0; |
138 | int slen; |
61 | } |
139 | |
62 | |
140 | /* Set up replyinfo before we modify any of the buffers - this is used |
63 | void |
141 | * if we don't find a match. |
64 | client::queue_command (packet_type *handler, char *data, int datalen) |
142 | */ |
65 | { |
143 | strcpy (bigbuf, "replyinfo "); |
66 | tstamp stamp = now (); |
144 | slen = strlen (bigbuf); |
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145 | safe_strcat (bigbuf, buf, &slen, MAX_BUF); |
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146 | |
67 | |
147 | /* find the first space, make it null, and update the |
68 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
148 | * params pointer. |
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149 | */ |
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150 | for (cp = buf; *cp != '\0'; cp++) |
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151 | if (*cp == ' ') |
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152 | { |
69 | { |
153 | *cp = '\0'; |
70 | //TODO: just disconnect here? |
154 | params = cp + 1; |
71 | reset_state (); |
155 | break; |
72 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
156 | } |
73 | } |
157 | |
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158 | if (!strcmp (buf, "image_info")) |
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159 | send_image_info (ns, params); |
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160 | else if (!strcmp (buf, "image_sums")) |
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161 | send_image_sums (ns, params); |
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162 | else if (!strcmp (buf, "skill_info")) |
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163 | send_skill_info (ns, params); |
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164 | else if (!strcmp (buf, "spell_paths")) |
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165 | send_spell_paths (ns, params); |
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166 | else |
74 | else |
167 | ns->send_packet (bigbuf, len); |
75 | { |
168 | } |
76 | cmd_queue.push_back (command ()); |
169 | |
77 | command &cmd = cmd_queue.back (); |
170 | /** |
78 | cmd.stamp = stamp; |
171 | * Handle client input. |
79 | cmd.handler = handler; |
172 | * |
80 | cmd.data = salloc<char> (datalen + 1, data); |
173 | * HandleClient is actually not named really well - we only get here once |
81 | cmd.datalen = datalen; |
174 | * there is input, so we don't do exception or other stuff here. |
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175 | * sock is the output socket information. pl is the player associated |
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176 | * with this socket, null if no player (one of the init_sockets for just |
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177 | * starting a connection) |
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178 | */ |
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179 | |
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180 | void |
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181 | HandleClient (client_socket *ns, player *pl) |
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182 | { |
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183 | /* Loop through this - maybe we have several complete packets here. */ |
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184 | // limit to a few commands only, though, as to not monopolise the server |
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185 | for (int repeat = 16; repeat--;) |
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186 | { |
82 | } |
187 | /* If it is a player, and they don't have any speed left, we |
83 | } |
188 | * return, and will read in the data when they do have time. |
84 | |
189 | */ |
85 | bool |
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86 | client::handle_command () |
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87 | { |
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88 | bool skipping = false; |
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89 | |
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90 | while (!cmd_queue.empty () |
190 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
91 | && !(pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0)) |
191 | return; |
92 | { |
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93 | command &cmd = cmd_queue.front (); |
192 | |
94 | |
193 | int pkt_len = ns->read_packet (); |
95 | if (cmd.stamp + MAX_QUEUE_BACKLOG < now ()) |
194 | |
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195 | if (pkt_len < 0) |
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196 | { |
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197 | LOG (llevError, "read error on player %s\n", &pl->ob->name); |
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198 | /* Caller will take care of cleaning this up */ |
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199 | ns->status = Ns_Dead; |
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200 | return; |
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201 | } |
96 | { |
202 | else if (pkt_len == 0) |
97 | if (!skipping) |
203 | /* Still dont have a full packet */ |
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204 | return; |
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205 | |
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206 | /* First, break out beginning word. There are at least |
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207 | * a few commands that do not have any paremeters. If |
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208 | * we get such a command, don't worry about trying |
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209 | * to break it up. |
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210 | */ |
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211 | int datalen; |
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212 | char *data = strchr ((char *)ns->inbuf + 2, ' '); |
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213 | |
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214 | if (data) |
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215 | { |
98 | { |
216 | *data++ = 0; |
99 | skipping = true; |
217 | datalen = pkt_len - (data - (char *)ns->inbuf); |
100 | reset_state (); |
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101 | send_packet_printf ("drawinfo %d ignoring delayed commands.", NDI_RED); |
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102 | } |
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103 | |
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104 | cmd_queue.pop_front (); |
218 | } |
105 | } |
219 | else |
106 | else |
220 | { |
107 | { |
221 | data = (char *)ns->inbuf + 2; // better read garbage than segfault |
108 | execute (cmd.handler, cmd.data, cmd.datalen); |
222 | datalen = 0; |
109 | cmd_queue.pop_front (); |
223 | } |
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224 | |
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225 | ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
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226 | |
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227 | for (int i = 0; nscommands[i].cmdname; i++) |
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228 | { |
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229 | if (!strcmp ((char *)ns->inbuf + 2, nscommands[i].cmdname)) |
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230 | { |
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231 | nscommands[i].cmdproc (data, datalen, ns); |
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232 | ns->skip_packet (pkt_len); |
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233 | //D// not doing this causes random memory corruption |
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234 | if (nscommands[i].flag & 2) |
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235 | goto next_packet; |
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236 | return; |
110 | return true; |
237 | } |
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238 | } |
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239 | |
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240 | /* Player must be in the playing state or the flag on the |
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241 | * the command must be zero for the user to use the command - |
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242 | * otherwise, a player cam save, be in the play_again state, and |
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243 | * the map they were on gets swapped out, yet things that try to look |
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244 | * at the map causes a crash. If the command is valid, but |
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245 | * one they can't use, we still swallow it up. |
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246 | */ |
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247 | if (pl) |
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248 | for (int i = 0; plcommands[i].cmdname; i++) |
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249 | { |
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250 | if (!strcmp ((char *)ns->inbuf + 2, plcommands[i].cmdname)) |
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251 | { |
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252 | if (pl->state == ST_PLAYING || !(plcommands[i].flag & 1)) |
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253 | plcommands[i].cmdproc ((char *) data, datalen, pl); |
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254 | |
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255 | ns->skip_packet (pkt_len); |
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256 | //D// not doing this causes random memory corruption |
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257 | if (plcommands[i].flag & 2) |
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258 | goto next_packet; |
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259 | |
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260 | return; |
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261 | } |
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262 | } |
111 | } |
263 | |
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264 | /* If we get here, we didn't find a valid command. Logging |
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265 | * this might be questionable, because a broken client/malicious |
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266 | * user could certainly send a whole bunch of invalid commands. |
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267 | */ |
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268 | LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2); |
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269 | ns->skip_packet (pkt_len); |
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270 | next_packet: |
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271 | ; |
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272 | } |
112 | } |
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113 | |
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114 | return false; |
273 | } |
115 | } |
274 | |
116 | |
275 | void |
117 | void |
276 | flush_sockets (void) |
118 | flush_sockets (void) |
277 | { |
119 | { |
278 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) |
120 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
279 | if ((*i)->status != Ns_Dead) |
121 | if ((*i)->status != Ns_Dead) |
280 | (*i)->flush (); |
122 | (*i)->flush (); |
281 | } |
123 | } |
282 | |
124 | |
283 | /** |
125 | /** |
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288 | * |
130 | * |
289 | */ |
131 | */ |
290 | void |
132 | void |
291 | doeric_server (void) |
133 | doeric_server (void) |
292 | { |
134 | { |
293 | int i, pollret; |
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294 | fd_set tmp_read; |
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295 | struct sockaddr_in addr; |
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296 | socklen_t addrlen = sizeof (struct sockaddr); |
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297 | player *pl, *next; |
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298 | int maxfd = 0; |
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299 | |
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300 | #ifdef CS_LOGSTATS |
135 | #ifdef CS_LOGSTATS |
301 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
136 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
302 | write_cs_stats (); |
137 | write_cs_stats (); |
303 | #endif |
138 | #endif |
304 | |
139 | |
305 | /* Go through the players. Let the loop set the next pl value, |
140 | /* Go through the players. Let the loop set the next pl value, |
306 | * since we may remove some |
141 | * since we may remove some |
307 | */ |
142 | */ |
308 | //TODO: must be handled cleanly elsewhere |
143 | //TODO: must be handled cleanly elsewhere |
309 | for (pl = first_player; pl; ) |
144 | for (player *pl = first_player; pl; ) |
310 | { |
145 | { |
311 | player *npl = pl->next; |
146 | player *npl = pl->next; |
312 | |
147 | |
313 | //TODO: must be handled cleanly elsewhere |
148 | //TODO: must be handled cleanly elsewhere |
314 | if (pl->socket->status == Ns_Dead) |
149 | if (!pl->socket || pl->socket->status == Ns_Dead) |
315 | { |
150 | { |
316 | save_player (pl->ob, 0); |
151 | save_player (pl->ob, 0); |
317 | |
152 | |
318 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
153 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
319 | { |
154 | { |
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326 | } |
161 | } |
327 | |
162 | |
328 | pl = npl; |
163 | pl = npl; |
329 | } |
164 | } |
330 | |
165 | |
331 | FD_ZERO (&tmp_read); |
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332 | |
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333 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ) |
166 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ) |
334 | { |
167 | { |
335 | client_socket *s = *i; |
168 | client *s = *i; |
336 | |
169 | |
337 | if (s->status == Ns_Dead) |
170 | if (s->status == Ns_Dead) |
338 | { |
171 | { |
339 | client_sockets.erase (i); |
172 | clients.erase (i); |
340 | delete s; |
173 | delete s; |
341 | } |
174 | } |
342 | else |
175 | else |
343 | { |
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344 | if (s->fd > maxfd) maxfd = s->fd; |
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345 | |
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346 | FD_SET (s->fd, &tmp_read); |
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347 | |
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348 | ++i; |
176 | ++i; |
349 | } |
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350 | } |
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351 | |
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352 | struct timeval timeout; |
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353 | |
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354 | timeout.tv_sec = 0; |
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355 | timeout.tv_usec = 0; |
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356 | |
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357 | pollret = select (maxfd + 1, |
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358 | &tmp_read, 0, 0, |
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359 | &timeout); |
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360 | |
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361 | if (pollret == -1) |
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362 | { |
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363 | LOG (llevError, "select failed: %s\n", strerror (errno)); |
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364 | return; |
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365 | } |
177 | } |
366 | |
178 | |
367 | /* We need to do some of the processing below regardless */ |
179 | /* We need to do some of the processing below regardless */ |
368 | |
180 | |
369 | /* Check for any input on the sockets */ |
181 | /* Check for any input on the sockets */ |
370 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) |
182 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
371 | { |
183 | { |
372 | client_socket *s = *i; |
184 | client *s = *i; |
373 | player *pl = s->pl; |
185 | player *pl = s->pl; |
374 | |
186 | |
375 | //TODO: disassociate handleclient from socket readin |
187 | s->handle_packet (); |
376 | if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read)) |
188 | s->handle_command (); |
377 | HandleClient (s, pl); |
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378 | |
189 | |
379 | //TODO: should not be done here, either |
190 | //TODO: should not be done here, either |
380 | if (s->status != Ns_Dead && pl) |
191 | if (s->status != Ns_Dead && pl) |
381 | { |
192 | { |
382 | /* Update the players stats once per tick. More efficient than |
193 | /* Update the players stats once per tick. More efficient than |
383 | * sending them whenever they change, and probably just as useful |
194 | * sending them whenever they change, and probably just as useful |
384 | */ |
195 | */ |
385 | esrv_update_stats (pl); |
196 | esrv_update_stats (pl); |
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197 | |
386 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
198 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
387 | { |
199 | { |
388 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
200 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
389 | if (pl->last_weight != WEIGHT (pl->ob)) |
201 | if (pl->last_weight != WEIGHT (pl->ob)) |
390 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
202 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
391 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
203 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
392 | } |
204 | } |
393 | |
205 | |
394 | /* draw_client_map does sanity checking that map is |
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395 | * valid, so don't do it here. |
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396 | */ |
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397 | draw_client_map (pl->ob); |
206 | draw_client_map (pl->ob); |
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207 | |
398 | if (s->update_look) |
208 | if (s->update_look) |
399 | esrv_draw_look (pl->ob); |
209 | esrv_draw_look (pl->ob); |
400 | } |
210 | } |
401 | } |
211 | } |
402 | } |
212 | } |