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 "inspircd.h"
  23 #include "configreader.h"
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <sys/errno.h>
  27 #include <sys/ioctl.h>
  28 #include <sys/utsname.h>
  29 #include <time.h>
  30 #include <string>
  31 #include <ext/hash_map>
  32 #include <map>
  33 #include <sstream>
  34 #include <vector>
  35 #include <deque>
  36 #include "users.h"
  37 #include "ctables.h"
  38 #include "globals.h"
  39 #include "modules.h"
  40 #include "dynamic.h"
  41 #include "wildcard.h"
  42 #include "message.h"
  43 #include "mode.h"
  44 #include "commands.h"
  45 #include "xline.h"
  46 #include "inspstring.h"
  47 #include "helperfuncs.h"
  48 #include "hashcomp.h"
  49 #include "socketengine.h"
  50 #include "userprocess.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 extern std::vector<userrec*> local_users;
  62 char data[65536];
  63
  64 extern user_hash clientlist;
  65 extern chan_hash chanlist;
  66
  67 void InspIRCd::ProcessUser(userrec* cu)
  68 {
  69         int result = EAGAIN;
  70
  71         if (cu->fd == FD_MAGIC_NUMBER)
  72                 return;
  73
  74         log(DEBUG,"Processing user with fd %d",cu->fd);
  75
  76         if (this->Config->GetIOHook(cu->GetPort()))
  77         {
  78                 int result2 = 0;
  79                 int MOD_RESULT = 0;
  80
  81                 try
  82                 {
  83                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  84                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  85                 }
  86                 catch (ModuleException& modexcept)
  87                 {
  88                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  89                 }
  90
  91                 if (MOD_RESULT < 0)
  92                 {
  93                         result = -EAGAIN;
  94                 }
  95                 else
  96                 {
  97                         result = result2;
  98                 }
  99         }
 100         else
 101         {
 102                 result = cu->ReadData(data, 65535);
 103         }
 104
 105         log(DEBUG,"Read result: %d",result);
 106
 107         if ((result) && (result != -EAGAIN))
 108         {
 109                 userrec *current;
 110                 int currfd;
 111                 int floodlines = 0;
 112
 113                 this->stats->statsRecv += result;
 114                 /*
 115                  * perform a check on the raw buffer as an array (not a string!) to remove
 116                  * character 0 which is illegal in the RFC - replace them with spaces.
 117                  * XXX - no garauntee there's not \0's in the middle of the data,
 118                  *       and no reason for it to be terminated either. -- Om
 119                  */
 120
 121                 for (int checker = 0; checker < result; checker++)
 122                 {
 123                         if (data[checker] == 0)
 124                                 data[checker] = ' ';
 125                 }
 126
 127                 if (result > 0)
 128                         data[result] = '\0';
 129
 130                 current = cu;
 131                 currfd = current->fd;
 132
 133                 // add the data to the users buffer
 134                 if (result > 0)
 135                 {
 136                         if (!current->AddBuffer(data))
 137                         {
 138                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 139                                 if (current->registered == REG_ALL)
 140                                 {
 141                                         // Make sure they arn't flooding long lines.
 142                                         if (TIME > current->reset_due)
 143                                         {
 144                                                 current->reset_due = TIME + current->threshold;
 145                                                 current->lines_in = 0;
 146                                         }
 147
 148                                         current->lines_in++;
 149
 150                                         if (current->lines_in > current->flood)
 151                                         {
 152                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 153                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 154                                                 userrec::QuitUser(current,"Excess flood");
 155                                                 return;
 156                                         }
 157                                         else
 158                                         {
 159                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 160                                                 current->recvq = "";
 161                                         }
 162                                 }
 163                                 else
 164                                 {
 165                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 166                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 167                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 168                                         apply_lines(APPLY_ZLINES);
 169                                 }
 170
 171                                 return;
 172                         }
 173
 174                         if (current->recvq.length() > (unsigned)this->Config->NetBufferSize)
 175                         {
 176                                 if (current->registered == REG_ALL)
 177                                 {
 178                                         userrec::QuitUser(current,"RecvQ exceeded");
 179                                 }
 180                                 else
 181                                 {
 182                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 183                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 184                                         add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 185                                         apply_lines(APPLY_ZLINES);
 186                                 }
 187
 188                                 return;
 189                         }
 190
 191                         // while there are complete lines to process...
 192                         while (current->BufferIsReady())
 193                         {
 194                                 if (TIME > current->reset_due)
 195                                 {
 196                                         current->reset_due = TIME + current->threshold;
 197                                         current->lines_in = 0;
 198                                 }
 199
 200                                 if (++current->lines_in > current->flood)
 201                                 {
 202                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 203                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 204                                         userrec::QuitUser(current,"Excess flood");
 205                                         return;
 206                                 }
 207
 208                                 if ((++floodlines > current->flood) && (current->flood != 0))
 209                                 {
 210                                         if (current->registered == REG_ALL)
 211                                         {
 212                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 213                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 214                                                 userrec::QuitUser(current,"Excess flood");
 215                                         }
 216                                         else
 217                                         {
 218                                                 add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 219                                                 apply_lines(APPLY_ZLINES);
 220                                         }
 221
 222                                         return;
 223                                 }
 224
 225                                 // use GetBuffer to copy single lines into the sanitized string
 226                                 std::string single_line = current->GetBuffer();
 227                                 current->bytes_in += single_line.length();
 228                                 current->cmds_in++;
 229                                 if (single_line.length() > 512)
 230                                         single_line.resize(512);
 231
 232                                 userrec* old_comp = this->fd_ref_table[currfd];
 233
 234                                 this->Parser->ProcessBuffer(single_line,current);
 235                                 /*
 236                                  * look for the user's record in case it's changed... if theyve quit,
 237                                  * we cant do anything more with their buffer, so bail.
 238                                  * there used to be an ugly, slow loop here. Now we have a reference
 239                                  * table, life is much easier (and FASTER)
 240                                  */
 241                                 userrec* new_comp = this->fd_ref_table[currfd];
 242                                 if ((currfd < 0) || (!this->fd_ref_table[currfd]) || (old_comp != new_comp))
 243                                 {
 244                                         return;
 245                                 }
 246                                 else
 247                                 {
 248                                         /* The user is still here, flush their buffer */
 249                                         current->FlushWriteBuf();
 250                                 }
 251                         }
 252
 253                         return;
 254                 }
 255
 256                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 257                 {
 258                         log(DEBUG,"killing: %s",cu->nick);
 259                         userrec::QuitUser(cu,strerror(errno));
 260                         return;
 261                 }
 262         }
 263
 264         // result EAGAIN means nothing read
 265         else if ((result == EAGAIN) || (result == -EAGAIN))
 266         {
 267                 /* do nothing */
 268         }
 269         else if (result == 0)
 270         {
 271                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 272                 userrec::QuitUser(cu,"Client exited");
 273                 log(DEBUG,"Bailing from client exit");
 274                 return;
 275         }
 276 }
 277
 278 void InspIRCd::DoSocketTimeouts(time_t TIME)
 279 {
 280         unsigned int numsockets = this->module_sockets.size();
 281         SocketEngine* SE = this->SE;
 282
 283         for (std::vector<InspSocket*>::iterator a = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
 284         {
 285                 InspSocket* s = (InspSocket*)*a;
 286                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (this->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 287                 {
 288                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 289                         this->socket_ref[s->GetFd()] = NULL;
 290                         SE->DelFd(s->GetFd());
 291                         this->module_sockets.erase(a);
 292                         s->Close();
 293                         DELETE(s);
 294                         break;
 295                 }
 296
 297                 if (this->module_sockets.size() != numsockets)
 298                         break;
 299         }
 300 }
 301
 302 /**
 303  * This function is called once a second from the mainloop.
 304  * It is intended to do background checking on all the user structs, e.g.
 305  * stuff like ping checks, registration timeouts, etc. This function is
 306  * also responsible for checking if InspSocket derived classes are timed out.
 307  */
 308 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 309 {
 310         CullList GlobalGoners;
 311
 312         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 313         for (unsigned long count2 = 0; count2 != local_users.size(); count2++)
 314         {
 315                 if (count2 >= local_users.size())
 316                         break;
 317
 318                 userrec* curr = local_users[count2];
 319
 320                 if (curr)
 321                 {
 322                         /*
 323                          * registration timeout -- didnt send USER/NICK/HOST
 324                          * in the time specified in their connection class.
 325                          */
 326                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 327                         {
 328                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 329                                 //ZapThisDns(curr->fd);
 330                                 GlobalGoners.AddItem(curr,"Registration timeout");
 331                                 continue;
 332                         }
 333                         /*
 334                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 335                          * say this user is ok to proceed, fully connect them.
 336                          */
 337                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 338                         {
 339                                 curr->dns_done = true;
 340                                 //ZapThisDns(curr->fd);
 341                                 this->stats->statsDnsBad++;
 342                                 curr->FullConnect(&GlobalGoners);
 343                                 continue;
 344                         }
 345                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 346                         {
 347                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 348                                 curr->FullConnect(&GlobalGoners);
 349                                 //ZapThisDns(curr->fd);
 350                                 continue;
 351                         }
 352                         // It's time to PING this user. Send them a ping.
 353                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 354                         {
 355                                 // This user didn't answer the last ping, remove them
 356                                 if (!curr->lastping)
 357                                 {
 358                                         GlobalGoners.AddItem(curr,"Ping timeout");
 359                                         curr->lastping = 1;
 360                                         curr->nping = TIME+curr->pingmax;
 361                                         continue;
 362                                 }
 363                                 curr->Write("PING :%s",this->Config->ServerName);
 364                                 curr->lastping = 0;
 365                                 curr->nping = TIME+curr->pingmax;
 366                         }
 367
 368                         /*
 369                          * We can flush the write buffer as the last thing we do, because if they
 370                          * match any of the above conditions its no use flushing their buffer anyway.
 371                          */
 372
 373                         curr->FlushWriteBuf();
 374                         if (*curr->GetWriteError())
 375                         {
 376                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 377                                 continue;
 378                         }
 379                 }
 380
 381         }
 382
 383
 384         /* Remove all the queued users who are due to be quit, free memory used. */
 385         GlobalGoners.Apply();
 386 }