src/userprocess.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 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "modules.h"
  24 #include "wildcard.h"
  25 #include "xline.h"
  26 #include "socketengine.h"
  27 #include "userprocess.h"
  28 #include "inspircd.h"
  29 #include "command_parse.h"
  30 #include "cull_list.h"
  31
  32 void InspIRCd::ProcessUser(userrec* cu)
  33 {
  34         int result = EAGAIN;
  35
  36         if (cu->GetFd() == FD_MAGIC_NUMBER)
  37                 return;
  38
  39         if (this->Config->GetIOHook(cu->GetPort()))
  40         {
  41                 int result2 = 0;
  42                 int MOD_RESULT = 0;
  43
  44                 try
  45                 {
  46                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
  47                         this->Log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  48                 }
  49                 catch (ModuleException& modexcept)
  50                 {
  51                         this->Log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  52                 }
  53
  54                 if (MOD_RESULT < 0)
  55                 {
  56                         result = -EAGAIN;
  57                 }
  58                 else
  59                 {
  60                         result = result2;
  61                 }
  62         }
  63         else
  64         {
  65                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  66         }
  67
  68         this->Log(DEBUG,"Read result: %d",result);
  69
  70         if ((result) && (result != -EAGAIN))
  71         {
  72                 userrec *current;
  73                 int currfd;
  74                 int floodlines = 0;
  75
  76                 this->stats->statsRecv += result;
  77                 /*
  78                  * perform a check on the raw buffer as an array (not a string!) to remove
  79                  * character 0 which is illegal in the RFC - replace them with spaces.
  80                  * XXX - no garauntee there's not \0's in the middle of the data,
  81                  *       and no reason for it to be terminated either. -- Om
  82                  */
  83
  84                 for (int checker = 0; checker < result; checker++)
  85                 {
  86                         if (ReadBuffer[checker] == 0)
  87                                 ReadBuffer[checker] = ' ';
  88                 }
  89
  90                 if (result > 0)
  91                         ReadBuffer[result] = '\0';
  92
  93                 current = cu;
  94                 currfd = current->GetFd();
  95
  96                 // add the data to the users buffer
  97                 if (result > 0)
  98                 {
  99                         if (!current->AddBuffer(ReadBuffer))
 100                         {
 101                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 102                                 if (current->registered == REG_ALL)
 103                                 {
 104                                         // Make sure they arn't flooding long lines.
 105                                         if (TIME > current->reset_due)
 106                                         {
 107                                                 current->reset_due = TIME + current->threshold;
 108                                                 current->lines_in = 0;
 109                                         }
 110
 111                                         current->lines_in++;
 112
 113                                         if (current->lines_in > current->flood)
 114                                         {
 115                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 116                                                 this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 117                                                 userrec::QuitUser(this, current,"Excess flood");
 118                                                 return;
 119                                         }
 120                                         else
 121                                         {
 122                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 123                                                 current->recvq = "";
 124                                         }
 125                                 }
 126                                 else
 127                                 {
 128                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 129                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 130                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 131                                         XLines->apply_lines(APPLY_ZLINES);
 132                                 }
 133
 134                                 return;
 135                         }
 136
 137                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 138                         {
 139                                 if (current->registered == REG_ALL)
 140                                 {
 141                                         userrec::QuitUser(this, current,"RecvQ exceeded");
 142                                 }
 143                                 else
 144                                 {
 145                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 146                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 147                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 148                                         XLines->apply_lines(APPLY_ZLINES);
 149                                 }
 150
 151                                 return;
 152                         }
 153
 154                         // while there are complete lines to process...
 155                         while (current->BufferIsReady())
 156                         {
 157                                 if (TIME > current->reset_due)
 158                                 {
 159                                         current->reset_due = TIME + current->threshold;
 160                                         current->lines_in = 0;
 161                                 }
 162
 163                                 if (++current->lines_in > current->flood)
 164                                 {
 165                                         this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 166                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 167                                         userrec::QuitUser(this, current,"Excess flood");
 168                                         return;
 169                                 }
 170
 171                                 if ((++floodlines > current->flood) && (current->flood != 0))
 172                                 {
 173                                         if (current->registered == REG_ALL)
 174                                         {
 175                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 176                                                 SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 177                                                 userrec::QuitUser(this, current,"Excess flood");
 178                                         }
 179                                         else
 180                                         {
 181                                                 XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 182                                                 XLines->apply_lines(APPLY_ZLINES);
 183                                         }
 184
 185                                         return;
 186                                 }
 187
 188                                 // use GetBuffer to copy single lines into the sanitized string
 189                                 std::string single_line = current->GetBuffer();
 190                                 current->bytes_in += single_line.length();
 191                                 current->cmds_in++;
 192                                 if (single_line.length() > 512)
 193                                         single_line.resize(512);
 194
 195                                 EventHandler* old_comp = this->SE->GetRef(currfd);
 196
 197                                 this->Parser->ProcessBuffer(single_line,current);
 198                                 /*
 199                                  * look for the user's record in case it's changed... if theyve quit,
 200                                  * we cant do anything more with their buffer, so bail.
 201                                  * there used to be an ugly, slow loop here. Now we have a reference
 202                                  * table, life is much easier (and FASTER)
 203                                  */
 204                                 EventHandler* new_comp = this->SE->GetRef(currfd);
 205                                 if (old_comp != new_comp)
 206                                 {
 207                                         return;
 208                                 }
 209                                 else
 210                                 {
 211                                         /* The user is still here, flush their buffer */
 212                                         current->FlushWriteBuf();
 213                                 }
 214                         }
 215
 216                         return;
 217                 }
 218
 219                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 220                 {
 221                         this->Log(DEBUG,"killing: %s",cu->nick);
 222                         userrec::QuitUser(this,cu,strerror(errno));
 223                         return;
 224                 }
 225         }
 226
 227         // result EAGAIN means nothing read
 228         else if ((result == EAGAIN) || (result == -EAGAIN))
 229         {
 230                 /* do nothing */
 231         }
 232         else if (result == 0)
 233         {
 234                 this->Log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 235                 userrec::QuitUser(this,cu,"Client exited");
 236                 this->Log(DEBUG,"Bailing from client exit");
 237                 return;
 238         }
 239 }
 240
 241 /**
 242  * This function is called once a second from the mainloop.
 243  * It is intended to do background checking on all the user structs, e.g.
 244  * stuff like ping checks, registration timeouts, etc. This function is
 245  * also responsible for checking if InspSocket derived classes are timed out.
 246  */
 247 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 248 {
 249         CullList GlobalGoners(this);
 250
 251         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 252         for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 253         {
 254                 if (count2 >= this->local_users.size())
 255                         break;
 256
 257                 userrec* curr = this->local_users[count2];
 258
 259                 if (curr)
 260                 {
 261                         /*
 262                          * registration timeout -- didnt send USER/NICK/HOST
 263                          * in the time specified in their connection class.
 264                          */
 265                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 266                         {
 267                                 this->Log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 268                                 //ZapThisDns(curr->fd);
 269                                 GlobalGoners.AddItem(curr,"Registration timeout");
 270                                 continue;
 271                         }
 272                         /*
 273                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 274                          * say this user is ok to proceed, fully connect them.
 275                          */
 276                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 277                         {
 278                                 curr->dns_done = true;
 279                                 //ZapThisDns(curr->fd);
 280                                 this->stats->statsDnsBad++;
 281                                 curr->FullConnect(&GlobalGoners);
 282                                 continue;
 283                         }
 284                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 285                         {
 286                                 this->Log(DEBUG,"dns done, registered=3, and modules ready, OK");
 287                                 curr->FullConnect(&GlobalGoners);
 288                                 //ZapThisDns(curr->fd);
 289                                 continue;
 290                         }
 291                         // It's time to PING this user. Send them a ping.
 292                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 293                         {
 294                                 // This user didn't answer the last ping, remove them
 295                                 if (!curr->lastping)
 296                                 {
 297                                         GlobalGoners.AddItem(curr,"Ping timeout");
 298                                         curr->lastping = 1;
 299                                         curr->nping = TIME+curr->pingmax;
 300                                         continue;
 301                                 }
 302                                 curr->Write("PING :%s",this->Config->ServerName);
 303                                 curr->lastping = 0;
 304                                 curr->nping = TIME+curr->pingmax;
 305                         }
 306
 307                         /*
 308                          * We can flush the write buffer as the last thing we do, because if they
 309                          * match any of the above conditions its no use flushing their buffer anyway.
 310                          */
 311
 312                         curr->FlushWriteBuf();
 313                         if (*curr->GetWriteError())
 314                         {
 315                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 316                                 continue;
 317                         }
 318                 }
 319
 320         }
 321
 322
 323         /* Remove all the queued users who are due to be quit, free memory used. */
 324         GlobalGoners.Apply();
 325 }
 326