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 extern std::vector<Module*> modules;
  57 extern std::vector<ircd_module*> factory;
  58 extern time_t TIME;
  59 extern time_t OLDTIME;
  60 char data[65536];
  61
  62 void InspIRCd::ProcessUser(userrec* cu)
  63 {
  64         int result = EAGAIN;
  65
  66         if (cu->fd == FD_MAGIC_NUMBER)
  67                 return;
  68
  69         log(DEBUG,"Processing user with fd %d",cu->fd);
  70
  71         if (this->Config->GetIOHook(cu->GetPort()))
  72         {
  73                 int result2 = 0;
  74                 int MOD_RESULT = 0;
  75
  76                 try
  77                 {
  78                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  79                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  80                 }
  81                 catch (ModuleException& modexcept)
  82                 {
  83                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  84                 }
  85
  86                 if (MOD_RESULT < 0)
  87                 {
  88                         result = -EAGAIN;
  89                 }
  90                 else
  91                 {
  92                         result = result2;
  93                 }
  94         }
  95         else
  96         {
  97                 result = cu->ReadData(data, 65535);
  98         }
  99
 100         log(DEBUG,"Read result: %d",result);
 101
 102         if ((result) && (result != -EAGAIN))
 103         {
 104                 userrec *current;
 105                 int currfd;
 106                 int floodlines = 0;
 107
 108                 this->stats->statsRecv += result;
 109                 /*
 110                  * perform a check on the raw buffer as an array (not a string!) to remove
 111                  * character 0 which is illegal in the RFC - replace them with spaces.
 112                  * XXX - no garauntee there's not \0's in the middle of the data,
 113                  *       and no reason for it to be terminated either. -- Om
 114                  */
 115
 116                 for (int checker = 0; checker < result; checker++)
 117                 {
 118                         if (data[checker] == 0)
 119                                 data[checker] = ' ';
 120                 }
 121
 122                 if (result > 0)
 123                         data[result] = '\0';
 124
 125                 current = cu;
 126                 currfd = current->fd;
 127
 128                 // add the data to the users buffer
 129                 if (result > 0)
 130                 {
 131                         if (!current->AddBuffer(data))
 132                         {
 133                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 134                                 if (current->registered == REG_ALL)
 135                                 {
 136                                         // Make sure they arn't flooding long lines.
 137                                         if (TIME > current->reset_due)
 138                                         {
 139                                                 current->reset_due = TIME + current->threshold;
 140                                                 current->lines_in = 0;
 141                                         }
 142
 143                                         current->lines_in++;
 144
 145                                         if (current->lines_in > current->flood)
 146                                         {
 147                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 148                                                 this->WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 149                                                 userrec::QuitUser(this, current,"Excess flood");
 150                                                 return;
 151                                         }
 152                                         else
 153                                         {
 154                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 155                                                 current->recvq = "";
 156                                         }
 157                                 }
 158                                 else
 159                                 {
 160                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 161                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 162                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 163                                         apply_lines(APPLY_ZLINES);
 164                                 }
 165
 166                                 return;
 167                         }
 168
 169                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 170                         {
 171                                 if (current->registered == REG_ALL)
 172                                 {
 173                                         userrec::QuitUser(this, current,"RecvQ exceeded");
 174                                 }
 175                                 else
 176                                 {
 177                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 178                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 179                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 180                                         apply_lines(APPLY_ZLINES);
 181                                 }
 182
 183                                 return;
 184                         }
 185
 186                         // while there are complete lines to process...
 187                         while (current->BufferIsReady())
 188                         {
 189                                 if (TIME > current->reset_due)
 190                                 {
 191                                         current->reset_due = TIME + current->threshold;
 192                                         current->lines_in = 0;
 193                                 }
 194
 195                                 if (++current->lines_in > current->flood)
 196                                 {
 197                                         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                                         return;
 201                                 }
 202
 203                                 if ((++floodlines > current->flood) && (current->flood != 0))
 204                                 {
 205                                         if (current->registered == REG_ALL)
 206                                         {
 207                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 208                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 209                                                 userrec::QuitUser(this, current,"Excess flood");
 210                                         }
 211                                         else
 212                                         {
 213                                                 add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 214                                                 apply_lines(APPLY_ZLINES);
 215                                         }
 216
 217                                         return;
 218                                 }
 219
 220                                 // use GetBuffer to copy single lines into the sanitized string
 221                                 std::string single_line = current->GetBuffer();
 222                                 current->bytes_in += single_line.length();
 223                                 current->cmds_in++;
 224                                 if (single_line.length() > 512)
 225                                         single_line.resize(512);
 226
 227                                 userrec* old_comp = this->fd_ref_table[currfd];
 228
 229                                 this->Parser->ProcessBuffer(single_line,current);
 230                                 /*
 231                                  * look for the user's record in case it's changed... if theyve quit,
 232                                  * we cant do anything more with their buffer, so bail.
 233                                  * there used to be an ugly, slow loop here. Now we have a reference
 234                                  * table, life is much easier (and FASTER)
 235                                  */
 236                                 userrec* new_comp = this->fd_ref_table[currfd];
 237                                 if ((currfd < 0) || (!this->fd_ref_table[currfd]) || (old_comp != new_comp))
 238                                 {
 239                                         return;
 240                                 }
 241                                 else
 242                                 {
 243                                         /* The user is still here, flush their buffer */
 244                                         current->FlushWriteBuf();
 245                                 }
 246                         }
 247
 248                         return;
 249                 }
 250
 251                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 252                 {
 253                         log(DEBUG,"killing: %s",cu->nick);
 254                         userrec::QuitUser(this,cu,strerror(errno));
 255                         return;
 256                 }
 257         }
 258
 259         // result EAGAIN means nothing read
 260         else if ((result == EAGAIN) || (result == -EAGAIN))
 261         {
 262                 /* do nothing */
 263         }
 264         else if (result == 0)
 265         {
 266                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 267                 userrec::QuitUser(this,cu,"Client exited");
 268                 log(DEBUG,"Bailing from client exit");
 269                 return;
 270         }
 271 }
 272
 273 void InspIRCd::DoSocketTimeouts(time_t TIME)
 274 {
 275         unsigned int numsockets = this->module_sockets.size();
 276         SocketEngine* SE = this->SE;
 277
 278         for (std::vector<InspSocket*>::iterator a = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
 279         {
 280                 InspSocket* s = (InspSocket*)*a;
 281                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (this->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 282                 {
 283                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 284                         this->socket_ref[s->GetFd()] = NULL;
 285                         SE->DelFd(s->GetFd());
 286                         this->module_sockets.erase(a);
 287                         s->Close();
 288                         DELETE(s);
 289                         break;
 290                 }
 291
 292                 if (this->module_sockets.size() != numsockets)
 293                         break;
 294         }
 295 }
 296
 297 /**
 298  * This function is called once a second from the mainloop.
 299  * It is intended to do background checking on all the user structs, e.g.
 300  * stuff like ping checks, registration timeouts, etc. This function is
 301  * also responsible for checking if InspSocket derived classes are timed out.
 302  */
 303 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 304 {
 305         CullList GlobalGoners;
 306
 307         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 308         for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 309         {
 310                 if (count2 >= this->local_users.size())
 311                         break;
 312
 313                 userrec* curr = this->local_users[count2];
 314
 315                 if (curr)
 316                 {
 317                         /*
 318                          * registration timeout -- didnt send USER/NICK/HOST
 319                          * in the time specified in their connection class.
 320                          */
 321                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 322                         {
 323                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 324                                 //ZapThisDns(curr->fd);
 325                                 GlobalGoners.AddItem(curr,"Registration timeout");
 326                                 continue;
 327                         }
 328                         /*
 329                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 330                          * say this user is ok to proceed, fully connect them.
 331                          */
 332                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 333                         {
 334                                 curr->dns_done = true;
 335                                 //ZapThisDns(curr->fd);
 336                                 this->stats->statsDnsBad++;
 337                                 curr->FullConnect(&GlobalGoners);
 338                                 continue;
 339                         }
 340                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 341                         {
 342                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 343                                 curr->FullConnect(&GlobalGoners);
 344                                 //ZapThisDns(curr->fd);
 345                                 continue;
 346                         }
 347                         // It's time to PING this user. Send them a ping.
 348                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 349                         {
 350                                 // This user didn't answer the last ping, remove them
 351                                 if (!curr->lastping)
 352                                 {
 353                                         GlobalGoners.AddItem(curr,"Ping timeout");
 354                                         curr->lastping = 1;
 355                                         curr->nping = TIME+curr->pingmax;
 356                                         continue;
 357                                 }
 358                                 curr->Write("PING :%s",this->Config->ServerName);
 359                                 curr->lastping = 0;
 360                                 curr->nping = TIME+curr->pingmax;
 361                         }
 362
 363                         /*
 364                          * We can flush the write buffer as the last thing we do, because if they
 365                          * match any of the above conditions its no use flushing their buffer anyway.
 366                          */
 367
 368                         curr->FlushWriteBuf();
 369                         if (*curr->GetWriteError())
 370                         {
 371                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 372                                 continue;
 373                         }
 374                 }
 375
 376         }
 377
 378
 379         /* Remove all the queued users who are due to be quit, free memory used. */
 380         GlobalGoners.Apply();
 381 }