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