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 "message.h"
  42 #include "mode.h"
  43 #include "commands.h"
  44 #include "xline.h"
  45 #include "inspstring.h"
  46 #include "helperfuncs.h"
  47 #include "hashcomp.h"
  48 #include "socketengine.h"
  49 #include "userprocess.h"
  50 #include "inspircd.h"
  51 #include "typedefs.h"
  52 #include "command_parse.h"
  53 #include "cull_list.h"
  54
  55 extern struct sockaddr_in client,server;
  56 extern socklen_t length;
  57 extern std::vector<Module*> modules;
  58 extern std::vector<ircd_module*> factory;
  59 extern time_t TIME;
  60 extern time_t OLDTIME;
  61 char data[65536];
  62
  63 void InspIRCd::ProcessUser(userrec* cu)
  64 {
  65         int result = EAGAIN;
  66
  67         if (cu->fd == FD_MAGIC_NUMBER)
  68                 return;
  69
  70         log(DEBUG,"Processing user with fd %d",cu->fd);
  71
  72         if (this->Config->GetIOHook(cu->GetPort()))
  73         {
  74                 int result2 = 0;
  75                 int MOD_RESULT = 0;
  76
  77                 try
  78                 {
  79                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  80                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  81                 }
  82                 catch (ModuleException& modexcept)
  83                 {
  84                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  85                 }
  86
  87                 if (MOD_RESULT < 0)
  88                 {
  89                         result = -EAGAIN;
  90                 }
  91                 else
  92                 {
  93                         result = result2;
  94                 }
  95         }
  96         else
  97         {
  98                 result = cu->ReadData(data, 65535);
  99         }
 100
 101         log(DEBUG,"Read result: %d",result);
 102
 103         if ((result) && (result != -EAGAIN))
 104         {
 105                 userrec *current;
 106                 int currfd;
 107                 int floodlines = 0;
 108
 109                 this->stats->statsRecv += result;
 110                 /*
 111                  * perform a check on the raw buffer as an array (not a string!) to remove
 112                  * character 0 which is illegal in the RFC - replace them with spaces.
 113                  * XXX - no garauntee there's not \0's in the middle of the data,
 114                  *       and no reason for it to be terminated either. -- Om
 115                  */
 116
 117                 for (int checker = 0; checker < result; checker++)
 118                 {
 119                         if (data[checker] == 0)
 120                                 data[checker] = ' ';
 121                 }
 122
 123                 if (result > 0)
 124                         data[result] = '\0';
 125
 126                 current = cu;
 127                 currfd = current->fd;
 128
 129                 // add the data to the users buffer
 130                 if (result > 0)
 131                 {
 132                         if (!current->AddBuffer(data))
 133                         {
 134                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 135                                 if (current->registered == REG_ALL)
 136                                 {
 137                                         // Make sure they arn't flooding long lines.
 138                                         if (TIME > current->reset_due)
 139                                         {
 140                                                 current->reset_due = TIME + current->threshold;
 141                                                 current->lines_in = 0;
 142                                         }
 143
 144                                         current->lines_in++;
 145
 146                                         if (current->lines_in > current->flood)
 147                                         {
 148                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 149                                                 this->WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 150                                                 userrec::QuitUser(this, current,"Excess flood");
 151                                                 return;
 152                                         }
 153                                         else
 154                                         {
 155                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 156                                                 current->recvq = "";
 157                                         }
 158                                 }
 159                                 else
 160                                 {
 161                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 162                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 163                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 164                                         apply_lines(APPLY_ZLINES);
 165                                 }
 166
 167                                 return;
 168                         }
 169
 170                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 171                         {
 172                                 if (current->registered == REG_ALL)
 173                                 {
 174                                         userrec::QuitUser(this, current,"RecvQ exceeded");
 175                                 }
 176                                 else
 177                                 {
 178                                         this->WriteOpers("*** Excess flood from %s",current->GetIPString());
 179                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 180                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 181                                         apply_lines(APPLY_ZLINES);
 182                                 }
 183
 184                                 return;
 185                         }
 186
 187                         // while there are complete lines to process...
 188                         while (current->BufferIsReady())
 189                         {
 190                                 if (TIME > current->reset_due)
 191                                 {
 192                                         current->reset_due = TIME + current->threshold;
 193                                         current->lines_in = 0;
 194                                 }
 195
 196                                 if (++current->lines_in > current->flood)
 197                                 {
 198                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 199                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 200                                         userrec::QuitUser(this, current,"Excess flood");
 201                                         return;
 202                                 }
 203
 204                                 if ((++floodlines > current->flood) && (current->flood != 0))
 205                                 {
 206                                         if (current->registered == REG_ALL)
 207                                         {
 208                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 209                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 210                                                 userrec::QuitUser(this, current,"Excess flood");
 211                                         }
 212                                         else
 213                                         {
 214                                                 add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 215                                                 apply_lines(APPLY_ZLINES);
 216                                         }
 217
 218                                         return;
 219                                 }
 220
 221                                 // use GetBuffer to copy single lines into the sanitized string
 222                                 std::string single_line = current->GetBuffer();
 223                                 current->bytes_in += single_line.length();
 224                                 current->cmds_in++;
 225                                 if (single_line.length() > 512)
 226                                         single_line.resize(512);
 227
 228                                 userrec* old_comp = this->fd_ref_table[currfd];
 229
 230                                 this->Parser->ProcessBuffer(single_line,current);
 231                                 /*
 232                                  * look for the user's record in case it's changed... if theyve quit,
 233                                  * we cant do anything more with their buffer, so bail.
 234                                  * there used to be an ugly, slow loop here. Now we have a reference
 235                                  * table, life is much easier (and FASTER)
 236                                  */
 237                                 userrec* new_comp = this->fd_ref_table[currfd];
 238                                 if ((currfd < 0) || (!this->fd_ref_table[currfd]) || (old_comp != new_comp))
 239                                 {
 240                                         return;
 241                                 }
 242                                 else
 243                                 {
 244                                         /* The user is still here, flush their buffer */
 245                                         current->FlushWriteBuf();
 246                                 }
 247                         }
 248
 249                         return;
 250                 }
 251
 252                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 253                 {
 254                         log(DEBUG,"killing: %s",cu->nick);
 255                         userrec::QuitUser(this,cu,strerror(errno));
 256                         return;
 257                 }
 258         }
 259
 260         // result EAGAIN means nothing read
 261         else if ((result == EAGAIN) || (result == -EAGAIN))
 262         {
 263                 /* do nothing */
 264         }
 265         else if (result == 0)
 266         {
 267                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 268                 userrec::QuitUser(this,cu,"Client exited");
 269                 log(DEBUG,"Bailing from client exit");
 270                 return;
 271         }
 272 }
 273
 274 void InspIRCd::DoSocketTimeouts(time_t TIME)
 275 {
 276         unsigned int numsockets = this->module_sockets.size();
 277         SocketEngine* SE = this->SE;
 278
 279         for (std::vector<InspSocket*>::iterator a = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
 280         {
 281                 InspSocket* s = (InspSocket*)*a;
 282                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (this->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 283                 {
 284                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 285                         this->socket_ref[s->GetFd()] = NULL;
 286                         SE->DelFd(s->GetFd());
 287                         this->module_sockets.erase(a);
 288                         s->Close();
 289                         DELETE(s);
 290                         break;
 291                 }
 292
 293                 if (this->module_sockets.size() != numsockets)
 294                         break;
 295         }
 296 }
 297
 298 /**
 299  * This function is called once a second from the mainloop.
 300  * It is intended to do background checking on all the user structs, e.g.
 301  * stuff like ping checks, registration timeouts, etc. This function is
 302  * also responsible for checking if InspSocket derived classes are timed out.
 303  */
 304 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 305 {
 306         CullList GlobalGoners;
 307
 308         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 309         for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 310         {
 311                 if (count2 >= this->local_users.size())
 312                         break;
 313
 314                 userrec* curr = this->local_users[count2];
 315
 316                 if (curr)
 317                 {
 318                         /*
 319                          * registration timeout -- didnt send USER/NICK/HOST
 320                          * in the time specified in their connection class.
 321                          */
 322                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 323                         {
 324                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 325                                 //ZapThisDns(curr->fd);
 326                                 GlobalGoners.AddItem(curr,"Registration timeout");
 327                                 continue;
 328                         }
 329                         /*
 330                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 331                          * say this user is ok to proceed, fully connect them.
 332                          */
 333                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 334                         {
 335                                 curr->dns_done = true;
 336                                 //ZapThisDns(curr->fd);
 337                                 this->stats->statsDnsBad++;
 338                                 curr->FullConnect(&GlobalGoners);
 339                                 continue;
 340                         }
 341                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 342                         {
 343                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 344                                 curr->FullConnect(&GlobalGoners);
 345                                 //ZapThisDns(curr->fd);
 346                                 continue;
 347                         }
 348                         // It's time to PING this user. Send them a ping.
 349                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 350                         {
 351                                 // This user didn't answer the last ping, remove them
 352                                 if (!curr->lastping)
 353                                 {
 354                                         GlobalGoners.AddItem(curr,"Ping timeout");
 355                                         curr->lastping = 1;
 356                                         curr->nping = TIME+curr->pingmax;
 357                                         continue;
 358                                 }
 359                                 curr->Write("PING :%s",this->Config->ServerName);
 360                                 curr->lastping = 0;
 361                                 curr->nping = TIME+curr->pingmax;
 362                         }
 363
 364                         /*
 365                          * We can flush the write buffer as the last thing we do, because if they
 366                          * match any of the above conditions its no use flushing their buffer anyway.
 367                          */
 368
 369                         curr->FlushWriteBuf();
 370                         if (*curr->GetWriteError())
 371                         {
 372                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 373                                 continue;
 374                         }
 375                 }
 376
 377         }
 378
 379
 380         /* Remove all the queued users who are due to be quit, free memory used. */
 381         GlobalGoners.Apply();
 382 }