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