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 #include "helperfuncs.h"
  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 extern struct sockaddr_in client,server;
  55 extern socklen_t length;
  56
  57 extern time_t TIME;
  58 extern time_t OLDTIME;
  59 char data[65536];
  60
  61 void InspIRCd::ProcessUser(userrec* cu)
  62 {
  63         int result = EAGAIN;
  64
  65         if (cu->fd == FD_MAGIC_NUMBER)
  66                 return;
  67
  68         log(DEBUG,"Processing user with fd %d",cu->fd);
  69
  70         if (this->Config->GetIOHook(cu->GetPort()))
  71         {
  72                 int result2 = 0;
  73                 int MOD_RESULT = 0;
  74
  75                 try
  76                 {
  77                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  78                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  79                 }
  80                 catch (ModuleException& modexcept)
  81                 {
  82                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  83                 }
  84
  85                 if (MOD_RESULT < 0)
  86                 {
  87                         result = -EAGAIN;
  88                 }
  89                 else
  90                 {
  91                         result = result2;
  92                 }
  93         }
  94         else
  95         {
  96                 result = cu->ReadData(data, 65535);
  97         }
  98
  99         log(DEBUG,"Read result: %d",result);
 100
 101         if ((result) && (result != -EAGAIN))
 102         {
 103                 userrec *current;
 104                 int currfd;
 105                 int floodlines = 0;
 106
 107                 this->stats->statsRecv += result;
 108                 /*
 109                  * perform a check on the raw buffer as an array (not a string!) to remove
 110                  * character 0 which is illegal in the RFC - replace them with spaces.
 111                  * XXX - no garauntee there's not \0's in the middle of the data,
 112                  *       and no reason for it to be terminated either. -- Om
 113                  */
 114
 115                 for (int checker = 0; checker < result; checker++)
 116                 {
 117                         if (data[checker] == 0)
 118                                 data[checker] = ' ';
 119                 }
 120
 121                 if (result > 0)
 122                         data[result] = '\0';
 123
 124                 current = cu;
 125                 currfd = current->fd;
 126
 127                 // add the data to the users buffer
 128                 if (result > 0)
 129                 {
 130                         if (!current->AddBuffer(data))
 131                         {
 132                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 133                                 if (current->registered == REG_ALL)
 134                                 {
 135                                         // Make sure they arn't flooding long lines.
 136                                         if (TIME > current->reset_due)
 137                                         {
 138                                                 current->reset_due = TIME + current->threshold;
 139                                                 current->lines_in = 0;
 140                                         }
 141
 142                                         current->lines_in++;
 143
 144                                         if (current->lines_in > current->flood)
 145                                         {
 146                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 147                                                 this->WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 148                                                 userrec::QuitUser(this, current,"Excess flood");
 149                                                 return;
 150                                         }
 151                                         else
 152                                         {
 153                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 154                                                 current->recvq = "";
 155                                         }
 156                                 }
 157                                 else
 158                                 {
 159                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 160                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 161                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 162                                         apply_lines(APPLY_ZLINES);
 163                                 }
 164
 165                                 return;
 166                         }
 167
 168                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 169                         {
 170                                 if (current->registered == REG_ALL)
 171                                 {
 172                                         userrec::QuitUser(this, current,"RecvQ exceeded");
 173                                 }
 174                                 else
 175                                 {
 176                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 177                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 178                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 179                                         apply_lines(APPLY_ZLINES);
 180                                 }
 181
 182                                 return;
 183                         }
 184
 185                         // while there are complete lines to process...
 186                         while (current->BufferIsReady())
 187                         {
 188                                 if (TIME > current->reset_due)
 189                                 {
 190                                         current->reset_due = TIME + current->threshold;
 191                                         current->lines_in = 0;
 192                                 }
 193
 194                                 if (++current->lines_in > current->flood)
 195                                 {
 196                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 197                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 198                                         userrec::QuitUser(this, current,"Excess flood");
 199                                         return;
 200                                 }
 201
 202                                 if ((++floodlines > current->flood) && (current->flood != 0))
 203                                 {
 204                                         if (current->registered == REG_ALL)
 205                                         {
 206                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 207                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 208                                                 userrec::QuitUser(this, current,"Excess flood");
 209                                         }
 210                                         else
 211                                         {
 212                                                 add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 213                                                 apply_lines(APPLY_ZLINES);
 214                                         }
 215
 216                                         return;
 217                                 }
 218
 219                                 // use GetBuffer to copy single lines into the sanitized string
 220                                 std::string single_line = current->GetBuffer();
 221                                 current->bytes_in += single_line.length();
 222                                 current->cmds_in++;
 223                                 if (single_line.length() > 512)
 224                                         single_line.resize(512);
 225
 226                                 userrec* old_comp = this->fd_ref_table[currfd];
 227
 228                                 this->Parser->ProcessBuffer(single_line,current);
 229                                 /*
 230                                  * look for the user's record in case it's changed... if theyve quit,
 231                                  * we cant do anything more with their buffer, so bail.
 232                                  * there used to be an ugly, slow loop here. Now we have a reference
 233                                  * table, life is much easier (and FASTER)
 234                                  */
 235                                 userrec* new_comp = this->fd_ref_table[currfd];
 236                                 if ((currfd < 0) || (!this->fd_ref_table[currfd]) || (old_comp != new_comp))
 237                                 {
 238                                         return;
 239                                 }
 240                                 else
 241                                 {
 242                                         /* The user is still here, flush their buffer */
 243                                         current->FlushWriteBuf();
 244                                 }
 245                         }
 246
 247                         return;
 248                 }
 249
 250                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 251                 {
 252                         log(DEBUG,"killing: %s",cu->nick);
 253                         userrec::QuitUser(this,cu,strerror(errno));
 254                         return;
 255                 }
 256         }
 257
 258         // result EAGAIN means nothing read
 259         else if ((result == EAGAIN) || (result == -EAGAIN))
 260         {
 261                 /* do nothing */
 262         }
 263         else if (result == 0)
 264         {
 265                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 266                 userrec::QuitUser(this,cu,"Client exited");
 267                 log(DEBUG,"Bailing from client exit");
 268                 return;
 269         }
 270 }
 271
 272 void InspIRCd::DoSocketTimeouts(time_t TIME)
 273 {
 274         unsigned int numsockets = this->module_sockets.size();
 275         SocketEngine* SE = this->SE;
 276
 277         for (std::vector<InspSocket*>::iterator a = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
 278         {
 279                 InspSocket* s = (InspSocket*)*a;
 280                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (this->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 281                 {
 282                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 283                         this->socket_ref[s->GetFd()] = NULL;
 284                         SE->DelFd(s->GetFd());
 285                         this->module_sockets.erase(a);
 286                         s->Close();
 287                         DELETE(s);
 288                         break;
 289                 }
 290
 291                 if (this->module_sockets.size() != numsockets)
 292                         break;
 293         }
 294 }
 295
 296 /**
 297  * This function is called once a second from the mainloop.
 298  * It is intended to do background checking on all the user structs, e.g.
 299  * stuff like ping checks, registration timeouts, etc. This function is
 300  * also responsible for checking if InspSocket derived classes are timed out.
 301  */
 302 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 303 {
 304         CullList GlobalGoners;
 305
 306         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 307         for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 308         {
 309                 if (count2 >= this->local_users.size())
 310                         break;
 311
 312                 userrec* curr = this->local_users[count2];
 313
 314                 if (curr)
 315                 {
 316                         /*
 317                          * registration timeout -- didnt send USER/NICK/HOST
 318                          * in the time specified in their connection class.
 319                          */
 320                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 321                         {
 322                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 323                                 //ZapThisDns(curr->fd);
 324                                 GlobalGoners.AddItem(curr,"Registration timeout");
 325                                 continue;
 326                         }
 327                         /*
 328                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 329                          * say this user is ok to proceed, fully connect them.
 330                          */
 331                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 332                         {
 333                                 curr->dns_done = true;
 334                                 //ZapThisDns(curr->fd);
 335                                 this->stats->statsDnsBad++;
 336                                 curr->FullConnect(&GlobalGoners);
 337                                 continue;
 338                         }
 339                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 340                         {
 341                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 342                                 curr->FullConnect(&GlobalGoners);
 343                                 //ZapThisDns(curr->fd);
 344                                 continue;
 345                         }
 346                         // It's time to PING this user. Send them a ping.
 347                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 348                         {
 349                                 // This user didn't answer the last ping, remove them
 350                                 if (!curr->lastping)
 351                                 {
 352                                         GlobalGoners.AddItem(curr,"Ping timeout");
 353                                         curr->lastping = 1;
 354                                         curr->nping = TIME+curr->pingmax;
 355                                         continue;
 356                                 }
 357                                 curr->Write("PING :%s",this->Config->ServerName);
 358                                 curr->lastping = 0;
 359                                 curr->nping = TIME+curr->pingmax;
 360                         }
 361
 362                         /*
 363                          * We can flush the write buffer as the last thing we do, because if they
 364                          * match any of the above conditions its no use flushing their buffer anyway.
 365                          */
 366
 367                         curr->FlushWriteBuf();
 368                         if (*curr->GetWriteError())
 369                         {
 370                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 371                                 continue;
 372                         }
 373                 }
 374
 375         }
 376
 377
 378         /* Remove all the queued users who are due to be quit, free memory used. */
 379         GlobalGoners.Apply();
 380 }