src/userprocess.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 "modules.h"
  17 #include "wildcard.h"
  18 #include "xline.h"
  19 #include "socketengine.h"
  20 #include "inspircd.h"
  21 #include "command_parse.h"
  22 #include "cull_list.h"
  23
  24 void InspIRCd::ProcessUser(userrec* cu)
  25 {
  26         int result = EAGAIN;
  27
  28         if (cu->GetFd() == FD_MAGIC_NUMBER)
  29                 return;
  30
  31         if (this->Config->GetIOHook(cu->GetPort()))
  32         {
  33                 int result2 = 0;
  34                 int MOD_RESULT = 0;
  35
  36                 try
  37                 {
  38                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
  39                 }
  40                 catch (CoreException& modexcept)
  41                 {
  42                         this->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  43                 }
  44
  45                 if (MOD_RESULT < 0)
  46                 {
  47                         result = -EAGAIN;
  48                 }
  49                 else
  50                 {
  51                         result = result2;
  52                 }
  53         }
  54         else
  55         {
  56                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  57         }
  58
  59         if ((result) && (result != -EAGAIN))
  60         {
  61                 userrec *current;
  62                 int currfd;
  63                 int floodlines = 0;
  64
  65                 this->stats->statsRecv += result;
  66                 /*
  67                  * perform a check on the raw buffer as an array (not a string!) to remove
  68                  * character 0 which is illegal in the RFC - replace them with spaces.
  69                  * XXX - no garauntee there's not \0's in the middle of the data,
  70                  *       and no reason for it to be terminated either. -- Om
  71                  */
  72
  73                 for (int checker = 0; checker < result; checker++)
  74                 {
  75                         if (ReadBuffer[checker] == 0)
  76                                 ReadBuffer[checker] = ' ';
  77                 }
  78
  79                 if (result > 0)
  80                         ReadBuffer[result] = '\0';
  81
  82                 current = cu;
  83                 currfd = current->GetFd();
  84
  85                 // add the data to the users buffer
  86                 if (result > 0)
  87                 {
  88                         if (!current->AddBuffer(ReadBuffer))
  89                         {
  90                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
  91                                 if (current->registered == REG_ALL)
  92                                 {
  93                                         // Make sure they arn't flooding long lines.
  94                                         if (TIME > current->reset_due)
  95                                         {
  96                                                 current->reset_due = TIME + current->threshold;
  97                                                 current->lines_in = 0;
  98                                         }
  99
 100                                         current->lines_in++;
 101
 102                                         if (current->lines_in > current->flood)
 103                                         {
 104                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 105                                                 this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 106                                                 current->SetWriteError("Excess flood");
 107                                                 return;
 108                                         }
 109                                         else
 110                                         {
 111                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 112                                                 current->recvq = "";
 113                                         }
 114                                 }
 115                                 else
 116                                 {
 117                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 118                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 119                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 120                                         XLines->apply_lines(APPLY_ZLINES);
 121                                 }
 122
 123                                 return;
 124                         }
 125
 126                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 127                         {
 128                                 if (current->registered == REG_ALL)
 129                                 {
 130                                         current->SetWriteError("RecvQ exceeded");
 131                                 }
 132                                 else
 133                                 {
 134                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 135                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s",current->GetIPString());
 136                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 137                                         XLines->apply_lines(APPLY_ZLINES);
 138                                 }
 139
 140                                 return;
 141                         }
 142
 143                         // while there are complete lines to process...
 144                         while (current->BufferIsReady())
 145                         {
 146                                 if (TIME > current->reset_due)
 147                                 {
 148                                         current->reset_due = TIME + current->threshold;
 149                                         current->lines_in = 0;
 150                                 }
 151
 152                                 if (++current->lines_in > current->flood)
 153                                 {
 154                                         this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 155                                         this->SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 156                                         current->SetWriteError("Excess flood");
 157                                         return;
 158                                 }
 159
 160                                 if ((++floodlines > current->flood) && (current->flood != 0))
 161                                 {
 162                                         if (current->registered == REG_ALL)
 163                                         {
 164                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 165                                                 SNO->WriteToSnoMask('f',"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 166                                                 current->SetWriteError("Excess flood");
 167                                         }
 168                                         else
 169                                         {
 170                                                 XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 171                                                 XLines->apply_lines(APPLY_ZLINES);
 172                                         }
 173
 174                                         return;
 175                                 }
 176
 177                                 // use GetBuffer to copy single lines into the sanitized string
 178                                 std::string single_line = current->GetBuffer();
 179                                 current->bytes_in += single_line.length();
 180                                 current->cmds_in++;
 181                                 if (single_line.length() > 512)
 182                                         single_line.resize(512);
 183
 184                                 EventHandler* old_comp = this->SE->GetRef(currfd);
 185
 186                                 this->Parser->ProcessBuffer(single_line,current);
 187                                 /*
 188                                  * look for the user's record in case it's changed... if theyve quit,
 189                                  * we cant do anything more with their buffer, so bail.
 190                                  * there used to be an ugly, slow loop here. Now we have a reference
 191                                  * table, life is much easier (and FASTER)
 192                                  */
 193                                 EventHandler* new_comp = this->SE->GetRef(currfd);
 194
 195                                 if (new_comp != old_comp)
 196                                         return;
 197                         }
 198
 199                         return;
 200                 }
 201
 202                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 203                 {
 204                         this->Log(DEBUG,"killing: %s",cu->nick);
 205                         cu->SetWriteError(strerror(errno));
 206                         return;
 207                 }
 208         }
 209
 210         // result EAGAIN means nothing read
 211         else if ((result == EAGAIN) || (result == -EAGAIN))
 212         {
 213                 /* do nothing */
 214         }
 215         else if (result == 0)
 216         {
 217                 cu->SetWriteError("Client exited");
 218                 this->Log(DEBUG,"Bailing from client exit");
 219                 return;
 220         }
 221 }
 222
 223 /**
 224  * This function is called once a second from the mainloop.
 225  * It is intended to do background checking on all the user structs, e.g.
 226  * stuff like ping checks, registration timeouts, etc.
 227  */
 228 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 229 {
 230         /* Is it time yet? */
 231         if (TIME < next_call)
 232                 return;
 233         else
 234         {
 235                 CullList GlobalGoners(this);
 236
 237                 /* Time we actually need to call this again */
 238                 const time_t DUMMY_VALUE = 32768;
 239                 next_call = TIME + DUMMY_VALUE;
 240
 241                 /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 242                 for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 243                 {
 244                         if (count2 >= this->local_users.size())
 245                                 break;
 246
 247                         userrec* curr = this->local_users[count2];
 248
 249                         if (curr)
 250                         {
 251                                 /*
 252                                  * registration timeout -- didnt send USER/NICK/HOST
 253                                  * in the time specified in their connection class.
 254                                  */
 255                                 if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
 256                                 {
 257                                         this->Log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 258                                         GlobalGoners.AddItem(curr,"Registration timeout");
 259                                         continue;
 260                                 }
 261                                 else
 262                                 {
 263                                         if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
 264                                                 next_call = curr->timeout;
 265                                 }
 266
 267                                 /*
 268                                  * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 269                                  * say this user is ok to proceed, fully connect them.
 270                                  */
 271                                 bool ready = AllModulesReportReady(curr);
 272                                 if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
 273                                 {
 274                                         curr->dns_done = true;
 275                                         this->stats->statsDnsBad++;
 276                                         curr->FullConnect(&GlobalGoners);
 277                                         continue;
 278                                 }
 279                                 else
 280                                 {
 281                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
 282                                                 next_call = curr->signon;
 283                                 }
 284
 285                                 if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
 286                                 {
 287                                         this->Log(DEBUG,"dns done, registered=3, and modules ready, OK");
 288                                         curr->FullConnect(&GlobalGoners);
 289                                         continue;
 290                                 }
 291                                 else
 292                                 {
 293                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
 294                                                 next_call = curr->signon + this->Config->dns_timeout;
 295                                 }
 296
 297                                 // It's time to PING this user. Send them a ping.
 298                                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 299                                 {
 300                                         // This user didn't answer the last ping, remove them
 301                                         if (!curr->lastping)
 302                                         {
 303                                                 /* Everybody loves boobies. */
 304                                                 time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 305                                                 std::string boobies = "Ping timeout: " + ConvToStr(time) + " second" + (time > 1 ? "s" : "");
 306                                                 GlobalGoners.AddItem(curr, boobies);
 307                                                 curr->lastping = 1;
 308                                                 curr->nping = TIME+curr->pingmax;
 309                                                 continue;
 310                                         }
 311                                         curr->Write("PING :%s",this->Config->ServerName);
 312                                         curr->lastping = 0;
 313                                         curr->nping = TIME+curr->pingmax;
 314                                 }
 315                                 else
 316                                 {
 317                                         if ((curr->registered == REG_ALL) && (next_call > curr->nping))
 318                                                 next_call = curr->nping;
 319                                 }
 320                         }
 321                 }
 322
 323                 /* If theres nothing to do, trigger in the next second, something might come up */
 324                 time_t delta = next_call - TIME;
 325                 if (delta == DUMMY_VALUE)
 326                 {
 327                         next_call = TIME + 1;
 328                         delta = 1;
 329                 }
 330
 331                 /* Remove all the queued users who are due to be quit, free memory used. */
 332                 GlobalGoners.Apply();
 333         }
 334 }
 335