src/command_parse.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include "inspircd_config.h"
  18 #include "inspircd.h"
  19 #include "configreader.h"
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <sys/errno.h>
  23 #include <sys/ioctl.h>
  24 #include <sys/utsname.h>
  25 #include <time.h>
  26 #include <string>
  27 #include <sstream>
  28 #include <vector>
  29 #include <sched.h>
  30 #ifdef THREADED_DNS
  31 #include <pthread.h>
  32 #endif
  33 #include "users.h"
  34 #include "globals.h"
  35 #include "modules.h"
  36 #include "dynamic.h"
  37 #include "wildcard.h"
  38 #include "message.h"
  39 #include "mode.h"
  40 #include "commands.h"
  41 #include "xline.h"
  42 #include "inspstring.h"
  43 #include "dnsqueue.h"
  44 #include "helperfuncs.h"
  45 #include "hashcomp.h"
  46 #include "socketengine.h"
  47 #include "userprocess.h"
  48 #include "socket.h"
  49 #include "dns.h"
  50 #include "typedefs.h"
  51 #include "command_parse.h"
  52 #include "ctables.h"
  53
  54 #define nspace __gnu_cxx
  55
  56 extern InspIRCd* ServerInstance;
  57
  58 extern std::vector<Module*> modules;
  59 extern std::vector<ircd_module*> factory;
  60 extern std::vector<InspSocket*> module_sockets;
  61 extern std::vector<userrec*> local_users;
  62
  63 extern int MODCOUNT;
  64 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  65 extern time_t TIME;
  66
  67 // This table references users by file descriptor.
  68 // its an array to make it VERY fast, as all lookups are referenced
  69 // by an integer, meaning there is no need for a scan/search operation.
  70 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  71
  72 extern Server* MyServer;
  73 extern ServerConfig *Config;
  74
  75 extern user_hash clientlist;
  76 extern chan_hash chanlist;
  77
  78 /* Special commands which may occur without registration of the user */
  79 cmd_user* command_user;
  80 cmd_nick* command_nick;
  81 cmd_pass* command_pass;
  82
  83 /* This function pokes and hacks at a parameter list like the following:
  84  *
  85  * PART #winbot,#darkgalaxy :m00!
  86  *
  87  * to turn it into a series of individual calls like this:
  88  *
  89  * PART #winbot :m00!
  90  * PART #darkgalaxy :m00!
  91  *
  92  * The seperate calls are sent to a callback function provided by the caller
  93  * (the caller will usually call itself recursively). The callback function
  94  * must be a command handler. Calling this function on a line with no list causes
  95  * no action to be taken. You must provide a starting and ending parameter number
  96  * where the range of the list can be found, useful if you have a terminating
  97  * parameter as above which is actually not part of the list, or parameters
  98  * before the actual list as well. This code is used by many functions which
  99  * can function as "one to list" (see the RFC) */
 100
 101 int CommandParser::LoopCall(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere, unsigned int extra)
 102 {
 103         /*if ((unsigned int)j > Config->MaxTargets)
 104         {
 105                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,sep_items[j-1]);
 106                 return 1;
 107         }
 108         fn->Handle(pars,pcnt-(end-start),u);
 109         return 1;*/
 110         if (!strchr(parameters[splithere],','))
 111                 return 0;
 112
 113         irc::commasepstream items1(parameters[splithere]);
 114         irc::commasepstream items2(parameters[extra]);
 115         std::string item = "";
 116
 117         while ((item = items1.GetToken()) != "")
 118         {
 119                 std::string extrastuff = items2.GetToken();
 120                 parameters[splithere] = item.c_str();
 121                 parameters[extra] = extrastuff.c_str();
 122                 CommandObj->Handle(parameters,pcnt,user);
 123         }
 124         return 1;
 125 }
 126
 127 int CommandParser::LoopCall(userrec* user, command_t* CommandObj, const char** parameters, int pcnt, unsigned int splithere)
 128 {
 129         if (!strchr(parameters[splithere],','))
 130                 return 0;
 131
 132         irc::commasepstream items1(parameters[splithere]);
 133         std::string item = "";
 134
 135         while ((item = items1.GetToken()) != "")
 136         {
 137                 parameters[splithere] = item.c_str();
 138                 CommandObj->Handle(parameters,pcnt,user);
 139         }
 140         return 1;
 141 }
 142
 143 bool CommandParser::IsValidCommand(const std::string &commandname, int pcnt, userrec * user)
 144 {
 145         nspace::hash_map<std::string,command_t*>::iterator n = cmdlist.find(commandname);
 146
 147         if (n != cmdlist.end())
 148         {
 149                 if ((pcnt>=n->second->min_params) && (n->second->source != "<core>"))
 150                 {
 151                         if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
 152                         {
 153                                 if (n->second->flags_needed)
 154                                 {
 155                                         return ((user->HasPermission(commandname)) || (is_uline(user->server)));
 156                                 }
 157                                 return true;
 158                         }
 159                 }
 160         }
 161         return false;
 162 }
 163
 164 // calls a handler function for a command
 165
 166 bool CommandParser::CallHandler(const std::string &commandname,const char** parameters, int pcnt, userrec *user)
 167 {
 168         nspace::hash_map<std::string,command_t*>::iterator n = cmdlist.find(commandname);
 169
 170         if (n != cmdlist.end())
 171         {
 172                 if (pcnt >= n->second->min_params)
 173                 {
 174                         if ((!n->second->flags_needed) || (user->modes[n->second->flags_needed-65]))
 175                         {
 176                                 if (n->second->flags_needed)
 177                                 {
 178                                         if ((user->HasPermission(commandname)) || (!IS_LOCAL(user)))
 179                                         {
 180                                                 n->second->Handle(parameters,pcnt,user);
 181                                                 return true;
 182                                         }
 183                                 }
 184                                 else
 185                                 {
 186                                         n->second->Handle(parameters,pcnt,user);
 187                                         return true;
 188                                 }
 189                         }
 190                 }
 191         }
 192         return false;
 193 }
 194
 195 void CommandParser::ProcessCommand(userrec *user, std::string &cmd)
 196 {
 197         const char *command_p[127];
 198         int items = 0;
 199         std::string para[127];
 200         irc::tokenstream tokens(cmd);
 201         std::string command = tokens.GetToken();
 202
 203         while (((para[items] = tokens.GetToken()) != "") && (items < 127))
 204                 command_p[items] = para[items++].c_str();
 205
 206         for (std::string::iterator makeupper = command.begin(); makeupper != command.end(); makeupper++)
 207                 *makeupper = toupper(*makeupper);
 208
 209         int MOD_RESULT = 0;
 210         FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,false));
 211         if (MOD_RESULT == 1) {
 212                 return;
 213         }
 214
 215         nspace::hash_map<std::string,command_t*>::iterator cm = cmdlist.find(command);
 216
 217         if (cm != cmdlist.end())
 218         {
 219                 if (user)
 220                 {
 221                         /* activity resets the ping pending timer */
 222                         user->nping = TIME + user->pingmax;
 223                         if (items < cm->second->min_params)
 224                         {
 225                                 log(DEBUG,"not enough parameters: %s %s",user->nick,command.c_str());
 226                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command.c_str());
 227                                 return;
 228                         }
 229                         if (cm->second->flags_needed)
 230                         {
 231                                 if (!user->IsModeSet(cm->second->flags_needed))
 232                                 {
 233                                         log(DEBUG,"permission denied: %s %s",user->nick,command.c_str());
 234                                         WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
 235                                         return;
 236                                 }
 237                         }
 238                         if ((cm->second->flags_needed) && (!user->HasPermission(command)))
 239                         {
 240                                 log(DEBUG,"permission denied: %s %s",user->nick,command.c_str());
 241                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command.c_str());
 242                                 return;
 243                         }
 244                         if ((user->registered == 7) && (!*user->oper) && (cm->second->IsDisabled()))
 245                         {
 246                                 /* command is disabled! */
 247                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command.c_str());
 248                                 return;
 249                         }
 250                         if ((user->registered == 7) || (cm->second == command_user) || (cm->second == command_nick) || (cm->second == command_pass))
 251                         {
 252                                 /* ikky /stats counters */
 253                                 cm->second->use_count++;
 254                                 cm->second->total_bytes += cmd.length();
 255
 256                                 int MOD_RESULT = 0;
 257                                 FOREACH_RESULT(I_OnPreCommand,OnPreCommand(command,command_p,items,user,true));
 258                                 if (MOD_RESULT == 1)
 259                                         return;
 260
 261                                 /*
 262                                  * WARNING: nothing may come after the
 263                                  * command handler call, as the handler
 264                                  * may free the user structure!
 265                                  */
 266
 267                                 cm->second->Handle(command_p,items,user);
 268                                 return;
 269                         }
 270                         else
 271                         {
 272                                 WriteServ(user->fd,"451 %s :You have not registered",command.c_str());
 273                                 return;
 274                         }
 275                 }
 276         }
 277         else if (user)
 278         {
 279                 ServerInstance->stats->statsUnknown++;
 280                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command.c_str());
 281         }
 282 }
 283
 284 bool CommandParser::RemoveCommands(const char* source)
 285 {
 286         bool go_again = true;
 287
 288         while (go_again)
 289         {
 290                 go_again = false;
 291
 292                 for (nspace::hash_map<std::string,command_t*>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
 293                 {
 294                         command_t* x = i->second;
 295                         if (x->source == std::string(source))
 296                         {
 297                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",x->source.c_str(),x->command.c_str());
 298                                 cmdlist.erase(i);
 299                                 go_again = true;
 300                                 break;
 301                         }
 302                 }
 303         }
 304
 305         return true;
 306 }
 307
 308 void CommandParser::ProcessBuffer(std::string &buffer,userrec *user)
 309 {
 310         std::string::size_type a;
 311
 312         if (!user)
 313                 return;
 314
 315         while ((a = buffer.find("\n")) != std::string::npos)
 316                 buffer.erase(a);
 317         while ((a = buffer.find("\r")) != std::string::npos)
 318                 buffer.erase(a);
 319
 320         log(DEBUG,"CMDIN: %s %s",user->nick,buffer.c_str());
 321
 322         this->ProcessCommand(user,buffer);
 323 }
 324
 325 bool CommandParser::CreateCommand(command_t *f)
 326 {
 327         /* create the command and push it onto the table */
 328         if (cmdlist.find(f->command) == cmdlist.end())
 329         {
 330                 cmdlist[f->command] = f;
 331                 log(DEBUG,"Added command %s (%lu parameters)",f->command.c_str(),(unsigned long)f->min_params);
 332                 return true;
 333         }
 334         else return false;
 335 }
 336
 337 CommandParser::CommandParser()
 338 {
 339         this->SetupCommandTable();
 340 }
 341
 342 void CommandParser::SetupCommandTable()
 343 {
 344         /* These three are special (can occur without
 345          * full user registration) and so are saved
 346          * for later use.
 347          */
 348         command_user = new cmd_user;
 349         command_nick = new cmd_nick;
 350         command_pass = new cmd_pass;
 351         this->CreateCommand(command_user);
 352         this->CreateCommand(command_nick);
 353         this->CreateCommand(command_pass);
 354
 355         /* The rest of these arent special. boo hoo.
 356          */
 357         this->CreateCommand(new cmd_quit);
 358         this->CreateCommand(new cmd_version);
 359         this->CreateCommand(new cmd_ping);
 360         this->CreateCommand(new cmd_pong);
 361         this->CreateCommand(new cmd_admin);
 362         this->CreateCommand(new cmd_privmsg);
 363         this->CreateCommand(new cmd_info);
 364         this->CreateCommand(new cmd_time);
 365         this->CreateCommand(new cmd_whois);
 366         this->CreateCommand(new cmd_wallops);
 367         this->CreateCommand(new cmd_notice);
 368         this->CreateCommand(new cmd_join);
 369         this->CreateCommand(new cmd_names);
 370         this->CreateCommand(new cmd_part);
 371         this->CreateCommand(new cmd_kick);
 372         this->CreateCommand(new cmd_mode);
 373         this->CreateCommand(new cmd_topic);
 374         this->CreateCommand(new cmd_who);
 375         this->CreateCommand(new cmd_motd);
 376         this->CreateCommand(new cmd_rules);
 377         this->CreateCommand(new cmd_oper);
 378         this->CreateCommand(new cmd_list);
 379         this->CreateCommand(new cmd_die);
 380         this->CreateCommand(new cmd_restart);
 381         this->CreateCommand(new cmd_kill);
 382         this->CreateCommand(new cmd_rehash);
 383         this->CreateCommand(new cmd_lusers);
 384         this->CreateCommand(new cmd_stats);
 385         this->CreateCommand(new cmd_userhost);
 386         this->CreateCommand(new cmd_away);
 387         this->CreateCommand(new cmd_ison);
 388         this->CreateCommand(new cmd_summon);
 389         this->CreateCommand(new cmd_users);
 390         this->CreateCommand(new cmd_invite);
 391         this->CreateCommand(new cmd_trace);
 392         this->CreateCommand(new cmd_whowas);
 393         this->CreateCommand(new cmd_connect);
 394         this->CreateCommand(new cmd_squit);
 395         this->CreateCommand(new cmd_modules);
 396         this->CreateCommand(new cmd_links);
 397         this->CreateCommand(new cmd_map);
 398         this->CreateCommand(new cmd_kline);
 399         this->CreateCommand(new cmd_gline);
 400         this->CreateCommand(new cmd_zline);
 401         this->CreateCommand(new cmd_qline);
 402         this->CreateCommand(new cmd_eline);
 403         this->CreateCommand(new cmd_loadmodule);
 404         this->CreateCommand(new cmd_unloadmodule);
 405         this->CreateCommand(new cmd_server);
 406         this->CreateCommand(new cmd_commands);
 407 }