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 "inspircd_config.h"
  22 #include "configreader.h"
  23 #include <unistd.h>
  24 #include <fcntl.h>
  25 #include <sys/errno.h>
  26 #include <sys/ioctl.h>
  27 #include <sys/utsname.h>
  28 #include <time.h>
  29 #include <string>
  30 #include <ext/hash_map>
  31 #include <map>
  32 #include <sstream>
  33 #include <vector>
  34 #include <deque>
  35 #include "users.h"
  36 #include "ctables.h"
  37 #include "globals.h"
  38 #include "modules.h"
  39 #include "dynamic.h"
  40 #include "wildcard.h"
  41 #include "mode.h"
  42 #include "commands.h"
  43 #include "xline.h"
  44 #include "inspstring.h"
  45
  46 #include "hashcomp.h"
  47 #include "socketengine.h"
  48 #include "userprocess.h"
  49 #include "inspircd.h"
  50 #include "typedefs.h"
  51 #include "command_parse.h"
  52 #include "cull_list.h"
  53
  54 void InspIRCd::ProcessUser(userrec* cu)
  55 {
  56         int result = EAGAIN;
  57
  58         if (cu->fd == FD_MAGIC_NUMBER)
  59                 return;
  60
  61         this->Log(DEBUG,"Processing user with fd %d",cu->fd);
  62
  63         if (this->Config->GetIOHook(cu->GetPort()))
  64         {
  65                 int result2 = 0;
  66                 int MOD_RESULT = 0;
  67
  68                 try
  69                 {
  70                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,ReadBuffer,sizeof(ReadBuffer),result2);
  71                         this->Log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  72                 }
  73                 catch (ModuleException& modexcept)
  74                 {
  75                         this->Log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  76                 }
  77
  78                 if (MOD_RESULT < 0)
  79                 {
  80                         result = -EAGAIN;
  81                 }
  82                 else
  83                 {
  84                         result = result2;
  85                 }
  86         }
  87         else
  88         {
  89                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  90         }
  91
  92         this->Log(DEBUG,"Read result: %d",result);
  93
  94         if ((result) && (result != -EAGAIN))
  95         {
  96                 userrec *current;
  97                 int currfd;
  98                 int floodlines = 0;
  99
 100                 this->stats->statsRecv += result;
 101                 /*
 102                  * perform a check on the raw buffer as an array (not a string!) to remove
 103                  * character 0 which is illegal in the RFC - replace them with spaces.
 104                  * XXX - no garauntee there's not \0's in the middle of the data,
 105                  *       and no reason for it to be terminated either. -- Om
 106                  */
 107
 108                 for (int checker = 0; checker < result; checker++)
 109                 {
 110                         if (ReadBuffer[checker] == 0)
 111                                 ReadBuffer[checker] = ' ';
 112                 }
 113
 114                 if (result > 0)
 115                         ReadBuffer[result] = '\0';
 116
 117                 current = cu;
 118                 currfd = current->fd;
 119
 120                 // add the data to the users buffer
 121                 if (result > 0)
 122                 {
 123                         if (!current->AddBuffer(ReadBuffer))
 124                         {
 125                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 126                                 if (current->registered == REG_ALL)
 127                                 {
 128                                         // Make sure they arn't flooding long lines.
 129                                         if (TIME > current->reset_due)
 130                                         {
 131                                                 current->reset_due = TIME + current->threshold;
 132                                                 current->lines_in = 0;
 133                                         }
 134
 135                                         current->lines_in++;
 136
 137                                         if (current->lines_in > current->flood)
 138                                         {
 139                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 140                                                 this->WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 141                                                 userrec::QuitUser(this, current,"Excess flood");
 142                                                 return;
 143                                         }
 144                                         else
 145                                         {
 146                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 147                                                 current->recvq = "";
 148                                         }
 149                                 }
 150                                 else
 151                                 {
 152                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 153                                         this->Log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 154                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 155                                         XLines->apply_lines(APPLY_ZLINES);
 156                                 }
 157
 158                                 return;
 159                         }
 160
 161                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 162                         {
 163                                 if (current->registered == REG_ALL)
 164                                 {
 165                                         userrec::QuitUser(this, current,"RecvQ exceeded");
 166                                 }
 167                                 else
 168                                 {
 169                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 170                                         this->Log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 171                                         XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 172                                         XLines->apply_lines(APPLY_ZLINES);
 173                                 }
 174
 175                                 return;
 176                         }
 177
 178                         // while there are complete lines to process...
 179                         while (current->BufferIsReady())
 180                         {
 181                                 if (TIME > current->reset_due)
 182                                 {
 183                                         current->reset_due = TIME + current->threshold;
 184                                         current->lines_in = 0;
 185                                 }
 186
 187                                 if (++current->lines_in > current->flood)
 188                                 {
 189                                         this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 190                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 191                                         userrec::QuitUser(this, current,"Excess flood");
 192                                         return;
 193                                 }
 194
 195                                 if ((++floodlines > current->flood) && (current->flood != 0))
 196                                 {
 197                                         if (current->registered == REG_ALL)
 198                                         {
 199                                                 this->Log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 200                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 201                                                 userrec::QuitUser(this, current,"Excess flood");
 202                                         }
 203                                         else
 204                                         {
 205                                                 XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 206                                                 XLines->apply_lines(APPLY_ZLINES);
 207                                         }
 208
 209                                         return;
 210                                 }
 211
 212                                 // use GetBuffer to copy single lines into the sanitized string
 213                                 std::string single_line = current->GetBuffer();
 214                                 current->bytes_in += single_line.length();
 215                                 current->cmds_in++;
 216                                 if (single_line.length() > 512)
 217                                         single_line.resize(512);
 218
 219                                 userrec* old_comp = this->fd_ref_table[currfd];
 220
 221                                 this->Parser->ProcessBuffer(single_line,current);
 222                                 /*
 223                                  * look for the user's record in case it's changed... if theyve quit,
 224                                  * we cant do anything more with their buffer, so bail.
 225                                  * there used to be an ugly, slow loop here. Now we have a reference
 226                                  * table, life is much easier (and FASTER)
 227                                  */
 228                                 userrec* new_comp = this->fd_ref_table[currfd];
 229                                 if ((currfd < 0) || (!this->fd_ref_table[currfd]) || (old_comp != new_comp))
 230                                 {
 231                                         return;
 232                                 }
 233                                 else
 234                                 {
 235                                         /* The user is still here, flush their buffer */
 236                                         current->FlushWriteBuf();
 237                                 }
 238                         }
 239
 240                         return;
 241                 }
 242
 243                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 244                 {
 245                         this->Log(DEBUG,"killing: %s",cu->nick);
 246                         userrec::QuitUser(this,cu,strerror(errno));
 247                         return;
 248                 }
 249         }
 250
 251         // result EAGAIN means nothing read
 252         else if ((result == EAGAIN) || (result == -EAGAIN))
 253         {
 254                 /* do nothing */
 255         }
 256         else if (result == 0)
 257         {
 258                 this->Log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 259                 userrec::QuitUser(this,cu,"Client exited");
 260                 this->Log(DEBUG,"Bailing from client exit");
 261                 return;
 262         }
 263 }
 264
 265 void InspIRCd::DoSocketTimeouts(time_t TIME)
 266 {
 267         unsigned int numsockets = this->module_sockets.size();
 268         SocketEngine* SE = this->SE;
 269
 270         for (std::vector<InspSocket*>::iterator a = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
 271         {
 272                 InspSocket* s = (InspSocket*)*a;
 273                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (this->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 274                 {
 275                         this->Log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 276                         this->socket_ref[s->GetFd()] = NULL;
 277                         SE->DelFd(s->GetFd());
 278                         this->module_sockets.erase(a);
 279                         s->Close();
 280                         DELETE(s);
 281                         break;
 282                 }
 283
 284                 if (this->module_sockets.size() != numsockets)
 285                         break;
 286         }
 287 }
 288
 289 /**
 290  * This function is called once a second from the mainloop.
 291  * It is intended to do background checking on all the user structs, e.g.
 292  * stuff like ping checks, registration timeouts, etc. This function is
 293  * also responsible for checking if InspSocket derived classes are timed out.
 294  */
 295 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 296 {
 297         CullList GlobalGoners(this);
 298
 299         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 300         for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 301         {
 302                 if (count2 >= this->local_users.size())
 303                         break;
 304
 305                 userrec* curr = this->local_users[count2];
 306
 307                 if (curr)
 308                 {
 309                         /*
 310                          * registration timeout -- didnt send USER/NICK/HOST
 311                          * in the time specified in their connection class.
 312                          */
 313                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 314                         {
 315                                 this->Log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 316                                 //ZapThisDns(curr->fd);
 317                                 GlobalGoners.AddItem(curr,"Registration timeout");
 318                                 continue;
 319                         }
 320                         /*
 321                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 322                          * say this user is ok to proceed, fully connect them.
 323                          */
 324                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 325                         {
 326                                 curr->dns_done = true;
 327                                 //ZapThisDns(curr->fd);
 328                                 this->stats->statsDnsBad++;
 329                                 curr->FullConnect(&GlobalGoners);
 330                                 continue;
 331                         }
 332                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 333                         {
 334                                 this->Log(DEBUG,"dns done, registered=3, and modules ready, OK");
 335                                 curr->FullConnect(&GlobalGoners);
 336                                 //ZapThisDns(curr->fd);
 337                                 continue;
 338                         }
 339                         // It's time to PING this user. Send them a ping.
 340                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 341                         {
 342                                 // This user didn't answer the last ping, remove them
 343                                 if (!curr->lastping)
 344                                 {
 345                                         GlobalGoners.AddItem(curr,"Ping timeout");
 346                                         curr->lastping = 1;
 347                                         curr->nping = TIME+curr->pingmax;
 348                                         continue;
 349                                 }
 350                                 curr->Write("PING :%s",this->Config->ServerName);
 351                                 curr->lastping = 0;
 352                                 curr->nping = TIME+curr->pingmax;
 353                         }
 354
 355                         /*
 356                          * We can flush the write buffer as the last thing we do, because if they
 357                          * match any of the above conditions its no use flushing their buffer anyway.
 358                          */
 359
 360                         curr->FlushWriteBuf();
 361                         if (*curr->GetWriteError())
 362                         {
 363                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 364                                 continue;
 365                         }
 366                 }
 367
 368         }
 369
 370
 371         /* Remove all the queued users who are due to be quit, free memory used. */
 372         GlobalGoners.Apply();
 373 }