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 std::vector<InspSocket*> module_sockets;
  60 extern time_t TIME;
  61 extern time_t OLDTIME;
  62 extern std::vector<userrec*> local_users;
  63 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  64
  65 extern InspIRCd* ServerInstance;
  66 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  67 char data[65536];
  68
  69 extern user_hash clientlist;
  70 extern chan_hash chanlist;
  71
  72 void ProcessUser(userrec* cu)
  73 {
  74         int result = EAGAIN;
  75
  76         if (cu->fd == FD_MAGIC_NUMBER)
  77                 return;
  78
  79         log(DEBUG,"Processing user with fd %d",cu->fd);
  80
  81         if (ServerInstance->Config->GetIOHook(cu->GetPort()))
  82         {
  83                 int result2 = 0;
  84                 int MOD_RESULT = 0;
  85
  86                 try
  87                 {
  88                         MOD_RESULT = ServerInstance->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  89                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  90                 }
  91                 catch (ModuleException& modexcept)
  92                 {
  93                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  94                 }
  95
  96                 if (MOD_RESULT < 0)
  97                 {
  98                         result = -EAGAIN;
  99                 }
 100                 else
 101                 {
 102                         result = result2;
 103                 }
 104         }
 105         else
 106         {
 107                 result = cu->ReadData(data, 65535);
 108         }
 109
 110         log(DEBUG,"Read result: %d",result);
 111
 112         if ((result) && (result != -EAGAIN))
 113         {
 114                 userrec *current;
 115                 int currfd;
 116                 int floodlines = 0;
 117
 118                 ServerInstance->stats->statsRecv += result;
 119                 /*
 120                  * perform a check on the raw buffer as an array (not a string!) to remove
 121                  * character 0 which is illegal in the RFC - replace them with spaces.
 122                  * XXX - no garauntee there's not \0's in the middle of the data,
 123                  *       and no reason for it to be terminated either. -- Om
 124                  */
 125
 126                 for (int checker = 0; checker < result; checker++)
 127                 {
 128                         if (data[checker] == 0)
 129                                 data[checker] = ' ';
 130                 }
 131
 132                 if (result > 0)
 133                         data[result] = '\0';
 134
 135                 current = cu;
 136                 currfd = current->fd;
 137
 138                 // add the data to the users buffer
 139                 if (result > 0)
 140                 {
 141                         if (!current->AddBuffer(data))
 142                         {
 143                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 144                                 if (current->registered == REG_ALL)
 145                                 {
 146                                         // Make sure they arn't flooding long lines.
 147                                         if (TIME > current->reset_due)
 148                                         {
 149                                                 current->reset_due = TIME + current->threshold;
 150                                                 current->lines_in = 0;
 151                                         }
 152
 153                                         current->lines_in++;
 154
 155                                         if (current->lines_in > current->flood)
 156                                         {
 157                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 158                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 159                                                 userrec::QuitUser(current,"Excess flood");
 160                                                 return;
 161                                         }
 162                                         else
 163                                         {
 164                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 165                                                 current->recvq = "";
 166                                         }
 167                                 }
 168                                 else
 169                                 {
 170                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 171                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 172                                         add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 173                                         apply_lines(APPLY_ZLINES);
 174                                 }
 175
 176                                 return;
 177                         }
 178
 179                         if (current->recvq.length() > (unsigned)ServerInstance->Config->NetBufferSize)
 180                         {
 181                                 if (current->registered == REG_ALL)
 182                                 {
 183                                         userrec::QuitUser(current,"RecvQ exceeded");
 184                                 }
 185                                 else
 186                                 {
 187                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 188                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 189                                         add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 190                                         apply_lines(APPLY_ZLINES);
 191                                 }
 192
 193                                 return;
 194                         }
 195
 196                         // while there are complete lines to process...
 197                         while (current->BufferIsReady())
 198                         {
 199                                 if (TIME > current->reset_due)
 200                                 {
 201                                         current->reset_due = TIME + current->threshold;
 202                                         current->lines_in = 0;
 203                                 }
 204
 205                                 if (++current->lines_in > current->flood)
 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(current,"Excess flood");
 210                                         return;
 211                                 }
 212
 213                                 if ((++floodlines > current->flood) && (current->flood != 0))
 214                                 {
 215                                         if (current->registered == REG_ALL)
 216                                         {
 217                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 218                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 219                                                 userrec::QuitUser(current,"Excess flood");
 220                                         }
 221                                         else
 222                                         {
 223                                                 add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 224                                                 apply_lines(APPLY_ZLINES);
 225                                         }
 226
 227                                         return;
 228                                 }
 229
 230                                 // use GetBuffer to copy single lines into the sanitized string
 231                                 std::string single_line = current->GetBuffer();
 232                                 current->bytes_in += single_line.length();
 233                                 current->cmds_in++;
 234                                 if (single_line.length() > 512)
 235                                         single_line.resize(512);
 236
 237                                 userrec* old_comp = fd_ref_table[currfd];
 238
 239                                 ServerInstance->Parser->ProcessBuffer(single_line,current);
 240                                 /*
 241                                  * look for the user's record in case it's changed... if theyve quit,
 242                                  * we cant do anything more with their buffer, so bail.
 243                                  * there used to be an ugly, slow loop here. Now we have a reference
 244                                  * table, life is much easier (and FASTER)
 245                                  */
 246                                 userrec* new_comp = fd_ref_table[currfd];
 247                                 if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
 248                                 {
 249                                         return;
 250                                 }
 251                                 else
 252                                 {
 253                                         /* The user is still here, flush their buffer */
 254                                         current->FlushWriteBuf();
 255                                 }
 256                         }
 257
 258                         return;
 259                 }
 260
 261                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 262                 {
 263                         log(DEBUG,"killing: %s",cu->nick);
 264                         userrec::QuitUser(cu,strerror(errno));
 265                         return;
 266                 }
 267         }
 268
 269         // result EAGAIN means nothing read
 270         else if ((result == EAGAIN) || (result == -EAGAIN))
 271         {
 272                 /* do nothing */
 273         }
 274         else if (result == 0)
 275         {
 276                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 277                 userrec::QuitUser(cu,"Client exited");
 278                 log(DEBUG,"Bailing from client exit");
 279                 return;
 280         }
 281 }
 282
 283 void DoSocketTimeouts(time_t TIME)
 284 {
 285         unsigned int numsockets = module_sockets.size();
 286         SocketEngine* SE = ServerInstance->SE;
 287
 288         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 289         {
 290                 InspSocket* s = (InspSocket*)*a;
 291                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 292                 {
 293                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 294                         socket_ref[s->GetFd()] = NULL;
 295                         SE->DelFd(s->GetFd());
 296                         module_sockets.erase(a);
 297                         s->Close();
 298                         DELETE(s);
 299                         break;
 300                 }
 301
 302                 if (module_sockets.size() != numsockets)
 303                         break;
 304         }
 305 }
 306
 307 /**
 308  * This function is called once a second from the mainloop.
 309  * It is intended to do background checking on all the user structs, e.g.
 310  * stuff like ping checks, registration timeouts, etc. This function is
 311  * also responsible for checking if InspSocket derived classes are timed out.
 312  */
 313 void DoBackgroundUserStuff(time_t TIME)
 314 {
 315         CullList GlobalGoners;
 316
 317         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 318         for (unsigned long count2 = 0; count2 != local_users.size(); count2++)
 319         {
 320                 if (count2 >= local_users.size())
 321                         break;
 322
 323                 userrec* curr = local_users[count2];
 324
 325                 if (curr)
 326                 {
 327                         /*
 328                          * registration timeout -- didnt send USER/NICK/HOST
 329                          * in the time specified in their connection class.
 330                          */
 331                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 332                         {
 333                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 334                                 //ZapThisDns(curr->fd);
 335                                 GlobalGoners.AddItem(curr,"Registration timeout");
 336                                 continue;
 337                         }
 338                         /*
 339                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 340                          * say this user is ok to proceed, fully connect them.
 341                          */
 342                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 343                         {
 344                                 curr->dns_done = true;
 345                                 //ZapThisDns(curr->fd);
 346                                 ServerInstance->stats->statsDnsBad++;
 347                                 curr->FullConnect(&GlobalGoners);
 348                                 continue;
 349                         }
 350                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 351                         {
 352                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 353                                 curr->FullConnect(&GlobalGoners);
 354                                 //ZapThisDns(curr->fd);
 355                                 continue;
 356                         }
 357                         // It's time to PING this user. Send them a ping.
 358                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 359                         {
 360                                 // This user didn't answer the last ping, remove them
 361                                 if (!curr->lastping)
 362                                 {
 363                                         GlobalGoners.AddItem(curr,"Ping timeout");
 364                                         curr->lastping = 1;
 365                                         curr->nping = TIME+curr->pingmax;
 366                                         continue;
 367                                 }
 368                                 curr->Write("PING :%s",ServerInstance->Config->ServerName);
 369                                 curr->lastping = 0;
 370                                 curr->nping = TIME+curr->pingmax;
 371                         }
 372
 373                         /*
 374                          * We can flush the write buffer as the last thing we do, because if they
 375                          * match any of the above conditions its no use flushing their buffer anyway.
 376                          */
 377
 378                         curr->FlushWriteBuf();
 379                         if (*curr->GetWriteError())
 380                         {
 381                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 382                                 continue;
 383                         }
 384                 }
 385
 386         }
 387
 388
 389         /* Remove all the queued users who are due to be quit, free memory used. */
 390         GlobalGoners.Apply();
 391 }