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