src/cmd_whowas.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "commands/cmd_whowas.h"
  16
  17 WhoWasMaintainTimer * timer;
  18
  19 extern "C" DllExport command_t* init_command(InspIRCd* Instance)
  20 {
  21         return new cmd_whowas(Instance);
  22 }
  23
  24 cmd_whowas::cmd_whowas(InspIRCd* Instance)
  25 : command_t(Instance, "WHOWAS", 0, 1)
  26 {
  27         syntax = "<nick>{,<nick>}";
  28         timer = new WhoWasMaintainTimer(Instance, 3600);
  29         Instance->Timers->AddTimer(timer);
  30 }
  31
  32 CmdResult cmd_whowas::Handle (const char** parameters, int pcnt, userrec* user)
  33 {
  34         /* if whowas disabled in config */
  35         if (ServerInstance->Config->WhoWasGroupSize == 0 || ServerInstance->Config->WhoWasMaxGroups == 0)
  36         {
  37                 user->WriteServ("421 %s %s :This command has been disabled.",user->nick,command.c_str());
  38                 return CMD_FAILURE;
  39         }
  40
  41         whowas_users::iterator i = whowas.find(parameters[0]);
  42
  43         if (i == whowas.end())
  44         {
  45                 user->WriteServ("406 %s %s :There was no such nickname",user->nick,parameters[0]);
  46                 user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  47                 return CMD_FAILURE;
  48         }
  49         else
  50         {
  51                 whowas_set* grp = i->second;
  52                 if (grp->size())
  53                 {
  54                         for (whowas_set::iterator ux = grp->begin(); ux != grp->end(); ux++)
  55                         {
  56                                 WhoWasGroup* u = *ux;
  57                                 time_t rawtime = u->signon;
  58                                 tm *timeinfo;
  59                                 char b[MAXBUF];
  60
  61                                 timeinfo = localtime(&rawtime);
  62
  63                                 /* XXX - 'b' could be only 25 chars long and then strlcpy() would terminate it for us too? */
  64                                 strlcpy(b,asctime(timeinfo),MAXBUF);
  65                                 b[24] = 0;
  66
  67                                 user->WriteServ("314 %s %s %s %s * :%s",user->nick,parameters[0],u->ident,u->dhost,u->gecos);
  68
  69                                 if (IS_OPER(user))
  70                                         user->WriteServ("379 %s %s :was connecting from *@%s", user->nick, parameters[0], u->host);
  71
  72                                 if (*ServerInstance->Config->HideWhoisServer && !IS_OPER(user))
  73                                         user->WriteServ("312 %s %s %s :%s",user->nick,parameters[0], ServerInstance->Config->HideWhoisServer, b);
  74                                 else
  75                                         user->WriteServ("312 %s %s %s :%s",user->nick,parameters[0], u->server, b);
  76                         }
  77                 }
  78                 else
  79                 {
  80                         user->WriteServ("406 %s %s :There was no such nickname",user->nick,parameters[0]);
  81                         user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  82                         return CMD_FAILURE;
  83                 }
  84         }
  85
  86         user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  87         return CMD_SUCCESS;
  88 }
  89
  90 CmdResult cmd_whowas::HandleInternal(const unsigned int id, const std::deque<classbase*> &parameters)
  91 {
  92         switch (id)
  93         {
  94                 case WHOWAS_ADD:
  95                         AddToWhoWas((userrec*)parameters[0]);
  96                 break;
  97
  98                 case WHOWAS_STATS:
  99                         GetStats((Extensible*)parameters[0]);
 100                 break;
 101
 102                 case WHOWAS_PRUNE:
 103                         PruneWhoWas(ServerInstance->Time());
 104                 break;
 105
 106                 case WHOWAS_MAINTAIN:
 107                         MaintainWhoWas(ServerInstance->Time());
 108                 break;
 109
 110                 default:
 111                 break;
 112         }
 113         return CMD_SUCCESS;
 114 }
 115
 116 void cmd_whowas::GetStats(Extensible* ext)
 117 {
 118         int whowas_size = 0;
 119         int whowas_bytes = 0;
 120         whowas_users_fifo::iterator iter;
 121         for (iter = whowas_fifo.begin(); iter != whowas_fifo.end(); iter++)
 122         {
 123                 whowas_set* n = (whowas_set*)whowas.find(iter->second)->second;
 124                 if (n->size())
 125                 {
 126                         whowas_size += n->size();
 127                         whowas_bytes += (sizeof(whowas_set) + ( sizeof(WhoWasGroup) * n->size() ) );
 128                 }
 129         }
 130         stats.assign("Whowas(MAPSETS) " +ConvToStr(whowas_size)+" ("+ConvToStr(whowas_bytes)+" bytes)");
 131         ext->Extend("stats", stats.c_str());
 132 }
 133
 134 void cmd_whowas::AddToWhoWas(userrec* user)
 135 {
 136         /* if whowas disabled */
 137         if (ServerInstance->Config->WhoWasGroupSize == 0 || ServerInstance->Config->WhoWasMaxGroups == 0)
 138         {
 139                 return;
 140         }
 141
 142         whowas_users::iterator iter = whowas.find(user->nick);
 143
 144         if (iter == whowas.end())
 145         {
 146                 whowas_set* n = new whowas_set;
 147                 WhoWasGroup *a = new WhoWasGroup(user);
 148                 n->push_back(a);
 149                 whowas[user->nick] = n;
 150                 whowas_fifo.push_back(std::make_pair(ServerInstance->Time(),user->nick));
 151
 152                 if ((int)(whowas.size()) > ServerInstance->Config->WhoWasMaxGroups)
 153                 {
 154                         whowas_users::iterator iter = whowas.find(whowas_fifo[0].second);
 155                         if (iter != whowas.end())
 156                         {
 157                                 whowas_set* n = (whowas_set*)iter->second;
 158                                 if (n->size())
 159                                 {
 160                                         while (n->begin() != n->end())
 161                                         {
 162                                                 WhoWasGroup *a = *(n->begin());
 163                                                 DELETE(a);
 164                                                 n->pop_front();
 165                                         }
 166                                 }
 167                                 DELETE(n);
 168                                 whowas.erase(iter);
 169                         }
 170                         whowas_fifo.pop_front();
 171                 }
 172         }
 173         else
 174         {
 175                 whowas_set* group = (whowas_set*)iter->second;
 176                 WhoWasGroup *a = new WhoWasGroup(user);
 177                 group->push_back(a);
 178
 179                 if ((int)(group->size()) > ServerInstance->Config->WhoWasGroupSize)
 180                 {
 181                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 182                         DELETE(a);
 183                         group->pop_front();
 184                 }
 185         }
 186 }
 187
 188 /* on rehash, refactor maps according to new conf values */
 189 void cmd_whowas::PruneWhoWas(time_t t)
 190 {
 191         /* config values */
 192         int groupsize = ServerInstance->Config->WhoWasGroupSize;
 193         int maxgroups = ServerInstance->Config->WhoWasMaxGroups;
 194         int maxkeep =   ServerInstance->Config->WhoWasMaxKeep;
 195
 196         /* first cut the list to new size (maxgroups) and also prune entries that are timed out. */
 197         whowas_users::iterator iter;
 198         int fifosize;
 199         while ((fifosize = (int)whowas_fifo.size()) > 0)
 200         {
 201                 if (fifosize > maxgroups || whowas_fifo[0].first < t - maxkeep)
 202                 {
 203                         iter = whowas.find(whowas_fifo[0].second);
 204                         /* hopefully redundant integrity check, but added while debugging r6216 */
 205                         if (iter == whowas.end())
 206                         {
 207                                 /* this should never happen, if it does maps are corrupt */
 208                                 ServerInstance->Log(DEFAULT, "BUG: Whowas maps got corrupted! (1)");
 209                                 return;
 210                         }
 211                         whowas_set* n = (whowas_set*)iter->second;
 212                         if (n->size())
 213                         {
 214                                 while (n->begin() != n->end())
 215                                 {
 216                                         WhoWasGroup *a = *(n->begin());
 217                                         DELETE(a);
 218                                         n->pop_front();
 219                                 }
 220                         }
 221                         DELETE(n);
 222                         whowas.erase(iter);
 223                         whowas_fifo.pop_front();
 224                 }
 225                 else
 226                         break;
 227         }
 228
 229         /* Then cut the whowas sets to new size (groupsize) */
 230         fifosize = (int)whowas_fifo.size();
 231         for (int i = 0; i < fifosize; i++)
 232         {
 233                 iter = whowas.find(whowas_fifo[0].second);
 234                 /* hopefully redundant integrity check, but added while debugging r6216 */
 235                 if (iter == whowas.end())
 236                 {
 237                         /* this should never happen, if it does maps are corrupt */
 238                         ServerInstance->Log(DEFAULT, "BUG: Whowas maps got corrupted! (2)");
 239                         return;
 240                 }
 241                 whowas_set* n = (whowas_set*)iter->second;
 242                 if (n->size())
 243                 {
 244                         int nickcount = n->size();
 245                         while (n->begin() != n->end() && nickcount > groupsize)
 246                         {
 247                                 WhoWasGroup *a = *(n->begin());
 248                                 DELETE(a);
 249                                 n->pop_front();
 250                                 nickcount--;
 251                         }
 252                 }
 253         }
 254 }
 255
 256 /* call maintain once an hour to remove expired nicks */
 257 void cmd_whowas::MaintainWhoWas(time_t t)
 258 {
 259         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 260         {
 261                 whowas_set* n = (whowas_set*)iter->second;
 262                 if (n->size())
 263                 {
 264                         while ((n->begin() != n->end()) && ((*n->begin())->signon < t - ServerInstance->Config->WhoWasMaxKeep))
 265                         {
 266                                 WhoWasGroup *a = *(n->begin());
 267                                 DELETE(a);
 268                                 n->erase(n->begin());
 269                         }
 270                 }
 271         }
 272 }
 273
 274 cmd_whowas::~cmd_whowas()
 275 {
 276         if (timer)
 277         {
 278                 ServerInstance->Timers->DelTimer(timer);
 279         }
 280
 281         whowas_users::iterator iter;
 282         int fifosize;
 283         while ((fifosize = (int)whowas_fifo.size()) > 0)
 284         {
 285                 iter = whowas.find(whowas_fifo[0].second);
 286                 /* hopefully redundant integrity check, but added while debugging r6216 */
 287                 if (iter == whowas.end())
 288                 {
 289                         /* this should never happen, if it does maps are corrupt */
 290                         ServerInstance->Log(DEFAULT, "BUG: Whowas maps got corrupted! (3)");
 291                         return;
 292                 }
 293                 whowas_set* n = (whowas_set*)iter->second;
 294                 if (n->size())
 295                 {
 296                         while (n->begin() != n->end())
 297                         {
 298                                 WhoWasGroup *a = *(n->begin());
 299                                 DELETE(a);
 300                                 n->pop_front();
 301                         }
 302                 }
 303                 DELETE(n);
 304                 whowas.erase(iter);
 305                 whowas_fifo.pop_front();
 306         }
 307 }
 308
 309 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 310 {
 311         this->host = strdup(user->host);
 312         this->dhost = strdup(user->dhost);
 313         this->ident = strdup(user->ident);
 314         this->server = user->server;
 315         this->gecos = strdup(user->fullname);
 316 }
 317
 318 WhoWasGroup::~WhoWasGroup()
 319 {
 320         if (host)
 321                 free(host);
 322         if (dhost)
 323                 free(dhost);
 324         if (ident)
 325                 free(ident);
 326         if (gecos)
 327                 free(gecos);
 328 }
 329
 330 /* every hour, run this function which removes all entries older than Config->WhoWasMaxKeep */
 331 void WhoWasMaintainTimer::Tick(time_t t)
 332 {
 333         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 334         if (whowas_command)
 335         {
 336                 std::deque<classbase*> params;
 337                 whowas_command->HandleInternal(WHOWAS_MAINTAIN, params);
 338         }
 339 }