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         ServerInstance->Log(DEBUG,"Entered cmd_whowas");
  43
  44         if (i == whowas.end())
  45         {
  46                 ServerInstance->Log(DEBUG,"No such nick in whowas");
  47                 user->WriteServ("406 %s %s :There was no such nickname",user->nick,parameters[0]);
  48                 user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  49                 return CMD_FAILURE;
  50         }
  51         else
  52         {
  53                 ServerInstance->Log(DEBUG,"Whowas set found");
  54                 whowas_set* grp = i->second;
  55                 if (grp->size())
  56                 {
  57                         for (whowas_set::iterator ux = grp->begin(); ux != grp->end(); ux++)
  58                         {
  59                                 ServerInstance->Log(DEBUG,"Spool whowas entry");
  60                                 WhoWasGroup* u = *ux;
  61                                 time_t rawtime = u->signon;
  62                                 tm *timeinfo;
  63                                 char b[MAXBUF];
  64
  65                                 timeinfo = localtime(&rawtime);
  66
  67                                 /* XXX - 'b' could be only 25 chars long and then strlcpy() would terminate it for us too? */
  68                                 strlcpy(b,asctime(timeinfo),MAXBUF);
  69                                 b[24] = 0;
  70
  71                                 user->WriteServ("314 %s %s %s %s * :%s",user->nick,parameters[0],u->ident,u->dhost,u->gecos);
  72
  73                                 if(*user->oper)
  74                                         user->WriteServ("379 %s %s :was connecting from *@%s", user->nick, parameters[0], u->host);
  75
  76                                 if(*ServerInstance->Config->HideWhoisServer && !(*user->oper))
  77                                         user->WriteServ("312 %s %s %s :%s",user->nick,parameters[0], ServerInstance->Config->HideWhoisServer, b);
  78                                 else
  79                                         user->WriteServ("312 %s %s %s :%s",user->nick,parameters[0], u->server, b);
  80                         }
  81                 }
  82                 else
  83                 {
  84                         ServerInstance->Log(DEBUG,"Oops, empty whowas set found");
  85                         user->WriteServ("406 %s %s :There was no such nickname",user->nick,parameters[0]);
  86                         user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  87                         return CMD_FAILURE;
  88                 }
  89         }
  90
  91         user->WriteServ("369 %s %s :End of WHOWAS",user->nick,parameters[0]);
  92         return CMD_SUCCESS;
  93 };
  94
  95 CmdResult cmd_whowas::HandleInternal(const unsigned int id, const std::deque<classbase*> &parameters)
  96 {
  97         switch (id)
  98         {
  99                 case WHOWAS_ADD:
 100                         AddToWhoWas((userrec*)parameters[0]);
 101                 break;
 102
 103                 case WHOWAS_STATS:
 104                         GetStats((Extensible*)parameters[0]);
 105                 break;
 106
 107                 case WHOWAS_PRUNE:
 108                         PruneWhoWas(ServerInstance->Time());
 109                 break;
 110
 111                 default:
 112                 break;
 113         }
 114         return CMD_SUCCESS;
 115 };
 116
 117 void cmd_whowas::GetStats(Extensible* ext)
 118 {
 119         int whowas_size = 0;
 120         int whowas_bytes = 0;
 121         whowas_users_fifo::iterator iter;
 122         for (iter = whowas_fifo.begin(); iter != whowas_fifo.end(); iter++)
 123         {
 124                 whowas_set* n = (whowas_set*)whowas.find(iter->second)->second;
 125                 if (n->size())
 126                 {
 127                         whowas_size += n->size();
 128                         whowas_bytes += (sizeof(whowas_set) + ( sizeof(WhoWasGroup) * n->size() ) );
 129                 }
 130         }
 131         ext->Extend("stats", std::string("Whowas(MAPSETS) " +ConvToStr(whowas_size)+" ("+ConvToStr(whowas_bytes)+" bytes)").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         ServerInstance->Log(DEBUG,"Add to whowas lists");
 145
 146         if (iter == whowas.end())
 147         {
 148                 ServerInstance->Log(DEBUG,"Adding new whowas set for %s",user->nick);
 149
 150                 whowas_set* n = new whowas_set;
 151                 WhoWasGroup *a = new WhoWasGroup(user);
 152                 n->push_back(a);
 153                 whowas[user->nick] = n;
 154                 whowas_fifo.push_back(std::make_pair(ServerInstance->Time(),user->nick));
 155
 156                 if ((int)(whowas.size()) > ServerInstance->Config->WhoWasMaxGroups)
 157                 {
 158                         ServerInstance->Log(DEBUG,"Maxgroups of %d reached deleting oldest group '%s'",ServerInstance->Config->WhoWasMaxGroups, whowas_fifo[0].second.c_str());
 159
 160                         whowas_users::iterator iter = whowas.find(whowas_fifo[0].second);
 161                         if (iter != whowas.end())
 162                         {
 163                                 whowas_set* n = (whowas_set*)iter->second;
 164                                 if (n->size())
 165                                 {
 166                                         while (n->begin() != n->end())
 167                                         {
 168                                                 WhoWasGroup *a = *(n->begin());
 169                                                 DELETE(a);
 170                                                 n->pop_front();
 171                                         }
 172                                 }
 173                                 whowas.erase(iter);
 174                         }
 175                         whowas_fifo.pop_front();
 176                 }
 177         }
 178         else
 179         {
 180                 whowas_set* group = (whowas_set*)iter->second;
 181
 182                 ServerInstance->Log(DEBUG,"Using existing whowas group for %s",user->nick);
 183
 184                 WhoWasGroup *a = new WhoWasGroup(user);
 185                 group->push_back(a);
 186
 187                 if ((int)(group->size()) > ServerInstance->Config->WhoWasGroupSize)
 188                 {
 189                         ServerInstance->Log(DEBUG,"Trimming existing group '%s' to %d entries",user->nick, ServerInstance->Config->WhoWasGroupSize);
 190                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 191                         DELETE(a);
 192                         group->pop_front();
 193                 }
 194         }
 195 }
 196
 197 /* on rehash, refactor maps according to new conf values */
 198 void cmd_whowas::PruneWhoWas(time_t t)
 199 {
 200         /* config values */
 201         int groupsize = ServerInstance->Config->WhoWasGroupSize;
 202         int maxgroups = ServerInstance->Config->WhoWasMaxGroups;
 203         int maxkeep =   ServerInstance->Config->WhoWasMaxKeep;
 204
 205         /* first cut the list to new size (maxgroups) and also prune entries that are timed out. */
 206         whowas_users::iterator iter;
 207         int fifosize;
 208         while ((fifosize = (int)whowas_fifo.size()) > 0)
 209         {
 210                 if (fifosize > maxgroups || whowas_fifo[0].first < t - maxkeep)
 211                 {
 212                         iter = whowas.find(whowas_fifo[0].second);
 213                         /* hopefully redundant integrity check, but added while debugging r6216 */
 214                         if (iter == whowas.end())
 215                         {
 216                                 /* this should never happen, if it does maps are corrupt */
 217                                 ServerInstance->Log(DEBUG, "Whowas maps got corrupted! (1)");
 218                                 return;
 219                         }
 220                         whowas_set* n = (whowas_set*)iter->second;
 221                         if (n->size())
 222                         {
 223                                 while (n->begin() != n->end())
 224                                 {
 225                                         WhoWasGroup *a = *(n->begin());
 226                                         DELETE(a);
 227                                         n->pop_front();
 228                                 }
 229                         }
 230                         DELETE(n);
 231                         whowas.erase(iter);
 232                         whowas_fifo.pop_front();
 233                 }
 234                 else
 235                         break;
 236         }
 237
 238         /* Then cut the whowas sets to new size (groupsize) */
 239         fifosize = (int)whowas_fifo.size();
 240         for (int i = 0; i < fifosize; i++)
 241         {
 242                 iter = whowas.find(whowas_fifo[0].second);
 243                 /* hopefully redundant integrity check, but added while debugging r6216 */
 244                 if (iter == whowas.end())
 245                 {
 246                         /* this should never happen, if it does maps are corrupt */
 247                         ServerInstance->Log(DEBUG, "Whowas maps got corrupted! (2)");
 248                         return;
 249                 }
 250                 whowas_set* n = (whowas_set*)iter->second;
 251                 if (n->size())
 252                 {
 253                         int nickcount = n->size();
 254                         while (n->begin() != n->end() && nickcount > groupsize)
 255                         {
 256                                 WhoWasGroup *a = *(n->begin());
 257                                 DELETE(a);
 258                                 n->pop_front();
 259                                 nickcount--;
 260                         }
 261                 }
 262         }
 263 }
 264
 265 cmd_whowas::~cmd_whowas()
 266 {
 267         if (timer)
 268         {
 269                 ServerInstance->Timers->DelTimer(timer);
 270         }
 271
 272         whowas_users::iterator iter;
 273         int fifosize;
 274         while ((fifosize = (int)whowas_fifo.size()) > 0)
 275         {
 276                 iter = whowas.find(whowas_fifo[0].second);
 277                 /* hopefully redundant integrity check, but added while debugging r6216 */
 278                 if (iter == whowas.end())
 279                 {
 280                         /* this should never happen, if it does maps are corrupt */
 281                         ServerInstance->Log(DEBUG, "Whowas maps got corrupted! (1)");
 282                         return;
 283                 }
 284                 whowas_set* n = (whowas_set*)iter->second;
 285                 if (n->size())
 286                 {
 287                         while (n->begin() != n->end())
 288                         {
 289                                 WhoWasGroup *a = *(n->begin());
 290                                 DELETE(a);
 291                                 n->pop_front();
 292                         }
 293                 }
 294                 DELETE(n);
 295                 whowas.erase(iter);
 296                 whowas_fifo.pop_front();
 297         }
 298 }
 299
 300 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 301 {
 302         this->host = strdup(user->host);
 303         this->dhost = strdup(user->dhost);
 304         this->ident = strdup(user->ident);
 305         this->server = user->server;
 306         this->gecos = strdup(user->fullname);
 307 }
 308
 309 WhoWasGroup::~WhoWasGroup()
 310 {
 311         if (host)
 312                 free(host);
 313         if (dhost)
 314                 free(dhost);
 315         if (ident)
 316                 free(ident);
 317         if (gecos)
 318                 free(gecos);
 319 }
 320
 321 /* every hour, run this function which removes all entries older than Config->WhoWasMaxKeep */
 322 void MaintainTimer::Tick(time_t t)
 323 {
 324         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 325         {
 326                 whowas_set* n = (whowas_set*)iter->second;
 327                 if (n->size())
 328                 {
 329                         while ((n->begin() != n->end()) && ((*n->begin())->signon < t - ServerInstance->Config->WhoWasMaxKeep))
 330                         {
 331                                 WhoWasGroup *a = *(n->begin());
 332                                 DELETE(a);
 333                                 n->erase(n->begin());
 334                         }
 335                 }
 336         }
 337         timer = new MaintainTimer(ServerInstance, 3600);
 338         ServerInstance->Timers->AddTimer(timer);
 339 }