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