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 "inspircd.h"
  28 #include "command_parse.h"
  29 #include "cull_list.h"
  30
  31 void InspIRCd::ProcessUser(userrec* cu)
  32 {
  33         int result = EAGAIN;
  34
  35         if (cu->GetFd() == FD_MAGIC_NUMBER)
  36                 return;
  37
  38         if (this->Config->GetIOHook(cu->GetPort()))
  39         {
  40                 int result2 = 0;
  41                 int MOD_RESULT = 0;
  42
  43                 try
  44                 {
  45                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
  46                 }
  47                 catch (ModuleException& modexcept)
  48                 {
  49                         this->Log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  50                 }
  51
  52                 if (MOD_RESULT < 0)
  53                 {
  54                         result = -EAGAIN;
  55                 }
  56                 else
  57                 {
  58                         result = result2;
  59                 }
  60         }
  61         else
  62         {
  63                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  64         }
  65
  66         this->Log(DEBUG,"Read result: %d",result);
  67
  68         if ((result) && (result != -EAGAIN))
  69         {
  70                 userrec *current;
  71                 int currfd;
  72                 int floodlines = 0;
  73
  74                 this->stats->statsRecv += result;
  75                 /*
  76                  * perform a check on the raw buffer as an array (not a string!) to remove
  77                  * character 0 which is illegal in the RFC - replace them with spaces.
  78                  * XXX - no garauntee there's not \0's in the middle of the data,
  79                  *       and no reason for it to be terminated either. -- Om
  80                  */
  81
  82                 for (int checker = 0; checker < result; checker++)
  83                 {
  84                         if (ReadBuffer[checker] == 0)
  85                                 ReadBuffer[checker] = ' ';
  86                 }
  87
  88                 if (result > 0)
  89                         ReadBuffer[result] = '\0';
  90
  91                 current = cu;
  92                 currfd = current->GetFd();
  93
  94                 // add the data to the users buffer
  95                 if (result > 0)
  96                 {
  97                         if (!current->AddBuffer(ReadBuffer))
  98                         {
  99                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 100                                 if (current->registered == REG_ALL)
 101                                 {
 102                                         // Make sure they arn't flooding long lines.
 103                                         if (TIME > current->reset_due)
 104                                         {
 105                                                 current->reset_due = TIME + current->threshold;
 106                                                 current->lines_in = 0;
 107                                         }
 108
 109                                         current->lines_in++;
 110
 111                                         if (current->lines_in > current->flood)
 112                                         {
 113                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 114                                                 this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 115                                                 current->SetWriteError("Excess flood");
 116                                                 return;
 117                                         }
 118                                         else
 119                                         {
 120                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 121                                                 current->recvq = "";
 122                                         }
 123                                 }
 124                                 else
 125                                 {
 126                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 127                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 128                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 129                                         XLines->apply_lines(APPLY_ZLINES);
 130                                 }
 131
 132                                 return;
 133                         }
 134
 135                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 136                         {
 137                                 if (current->registered == REG_ALL)
 138                                 {
 139                                         current->SetWriteError("RecvQ exceeded");
 140                                 }
 141                                 else
 142                                 {
 143                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 144                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 145                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 146                                         XLines->apply_lines(APPLY_ZLINES);
 147                                 }
 148
 149                                 return;
 150                         }
 151
 152                         // while there are complete lines to process...
 153                         while (current->BufferIsReady())
 154                         {
 155                                 if (TIME > current->reset_due)
 156                                 {
 157                                         current->reset_due = TIME + current->threshold;
 158                                         current->lines_in = 0;
 159                                 }
 160
 161                                 if (++current->lines_in > current->flood)
 162                                 {
 163                                         this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 164                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 165                                         current->SetWriteError("Excess flood");
 166                                         return;
 167                                 }
 168
 169                                 if ((++floodlines > current->flood) && (current->flood != 0))
 170                                 {
 171                                         if (current->registered == REG_ALL)
 172                                         {
 173                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 174                                                 SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 175                                                 current->SetWriteError("Excess flood");
 176                                         }
 177                                         else
 178                                         {
 179                                                 XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 180                                                 XLines->apply_lines(APPLY_ZLINES);
 181                                         }
 182
 183                                         return;
 184                                 }
 185
 186                                 // use GetBuffer to copy single lines into the sanitized string
 187                                 std::string single_line = current->GetBuffer();
 188                                 current->bytes_in += single_line.length();
 189                                 current->cmds_in++;
 190                                 if (single_line.length() > 512)
 191                                         single_line.resize(512);
 192
 193                                 EventHandler* old_comp = this->SE->GetRef(currfd);
 194
 195                                 this->Parser->ProcessBuffer(single_line,current);
 196                                 /*
 197                                  * look for the user's record in case it's changed... if theyve quit,
 198                                  * we cant do anything more with their buffer, so bail.
 199                                  * there used to be an ugly, slow loop here. Now we have a reference
 200                                  * table, life is much easier (and FASTER)
 201                                  */
 202                                 EventHandler* new_comp = this->SE->GetRef(currfd);
 203
 204                                 if (new_comp != old_comp)
 205                                         return;
 206                         }
 207
 208                         return;
 209                 }
 210
 211                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 212                 {
 213                         this->Log(DEBUG,"killing: %s",cu->nick);
 214                         cu->SetWriteError(strerror(errno));
 215                         return;
 216                 }
 217         }
 218
 219         // result EAGAIN means nothing read
 220         else if ((result == EAGAIN) || (result == -EAGAIN))
 221         {
 222                 /* do nothing */
 223         }
 224         else if (result == 0)
 225         {
 226                 cu->SetWriteError("Client exited");
 227                 this->Log(DEBUG,"Bailing from client exit");
 228                 return;
 229         }
 230 }
 231
 232 /**
 233  * This function is called once a second from the mainloop.
 234  * It is intended to do background checking on all the user structs, e.g.
 235  * stuff like ping checks, registration timeouts, etc.
 236  */
 237 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 238 {
 239         /* Is it time yet? */
 240         if (TIME < next_call)
 241                 return;
 242         else
 243         {
 244                 CullList GlobalGoners(this);
 245
 246                 /* Time we actually need to call this again */
 247                 const time_t DUMMY_VALUE = 32768;
 248                 next_call = TIME + DUMMY_VALUE;
 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                                         GlobalGoners.AddItem(curr,"Registration timeout");
 268                                         continue;
 269                                 }
 270                                 else
 271                                 {
 272                                         if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
 273                                                 next_call = curr->timeout;
 274                                 }
 275
 276                                 /*
 277                                  * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 278                                  * say this user is ok to proceed, fully connect them.
 279                                  */
 280                                 bool ready = AllModulesReportReady(curr);
 281                                 if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
 282                                 {
 283                                         curr->dns_done = true;
 284                                         this->stats->statsDnsBad++;
 285                                         curr->FullConnect(&GlobalGoners);
 286                                         continue;
 287                                 }
 288                                 else
 289                                 {
 290                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
 291                                                 next_call = curr->signon;
 292                                 }
 293
 294                                 if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
 295                                 {
 296                                         this->Log(DEBUG,"dns done, registered=3, and modules ready, OK");
 297                                         curr->FullConnect(&GlobalGoners);
 298                                         continue;
 299                                 }
 300                                 else
 301                                 {
 302                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
 303                                                 next_call = curr->signon + this->Config->dns_timeout;
 304                                 }
 305
 306                                 // It's time to PING this user. Send them a ping.
 307                                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 308                                 {
 309                                         // This user didn't answer the last ping, remove them
 310                                         if (!curr->lastping)
 311                                         {
 312                                                 /* Everybody loves boobies. */
 313                                                 time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 314                                                 std::string boobies = "Ping timeout: " + ConvToStr(time) + " second" + (time > 1 ? "s" : "");
 315                                                 GlobalGoners.AddItem(curr, boobies);
 316                                                 curr->lastping = 1;
 317                                                 curr->nping = TIME+curr->pingmax;
 318                                                 continue;
 319                                         }
 320                                         curr->Write("PING :%s",this->Config->ServerName);
 321                                         curr->lastping = 0;
 322                                         curr->nping = TIME+curr->pingmax;
 323                                 }
 324                                 else
 325                                 {
 326                                         if ((curr->registered == REG_ALL) && (next_call > curr->nping))
 327                                                 next_call = curr->nping;
 328                                 }
 329                         }
 330                 }
 331
 332                 /* If theres nothing to do, trigger in the next second, something might come up */
 333                 time_t delta = next_call - TIME;
 334                 if (delta == DUMMY_VALUE)
 335                 {
 336                         next_call = TIME + 1;
 337                         delta = 1;
 338                 }
 339
 340                 /* Remove all the queued users who are due to be quit, free memory used. */
 341                 GlobalGoners.Apply();
 342         }
 343 }
 344