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