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 extern InspIRCd* ServerInstance;
  63 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  64 char data[65536];
  65
  66 extern user_hash clientlist;
  67 extern chan_hash chanlist;
  68
  69 void ProcessUser(userrec* cu)
  70 {
  71         int result = EAGAIN;
  72
  73         if (cu->fd == FD_MAGIC_NUMBER)
  74                 return;
  75
  76         log(DEBUG,"Processing user with fd %d",cu->fd);
  77
  78         if (ServerInstance->Config->GetIOHook(cu->GetPort()))
  79         {
  80                 int result2 = 0;
  81                 int MOD_RESULT = 0;
  82
  83                 try
  84                 {
  85                         MOD_RESULT = ServerInstance->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  86                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  87                 }
  88                 catch (ModuleException& modexcept)
  89                 {
  90                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  91                 }
  92
  93                 if (MOD_RESULT < 0)
  94                 {
  95                         result = -EAGAIN;
  96                 }
  97                 else
  98                 {
  99                         result = result2;
 100                 }
 101         }
 102         else
 103         {
 104                 result = cu->ReadData(data, 65535);
 105         }
 106
 107         log(DEBUG,"Read result: %d",result);
 108
 109         if ((result) && (result != -EAGAIN))
 110         {
 111                 userrec *current;
 112                 int currfd;
 113                 int floodlines = 0;
 114
 115                 ServerInstance->stats->statsRecv += result;
 116                 /*
 117                  * perform a check on the raw buffer as an array (not a string!) to remove
 118                  * character 0 which is illegal in the RFC - replace them with spaces.
 119                  * XXX - no garauntee there's not \0's in the middle of the data,
 120                  *       and no reason for it to be terminated either. -- Om
 121                  */
 122
 123                 for (int checker = 0; checker < result; checker++)
 124                 {
 125                         if (data[checker] == 0)
 126                                 data[checker] = ' ';
 127                 }
 128
 129                 if (result > 0)
 130                         data[result] = '\0';
 131
 132                 current = cu;
 133                 currfd = current->fd;
 134
 135                 // add the data to the users buffer
 136                 if (result > 0)
 137                 {
 138                         if (!current->AddBuffer(data))
 139                         {
 140                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 141                                 if (current->registered == REG_ALL)
 142                                 {
 143                                         // Make sure they arn't flooding long lines.
 144                                         if (TIME > current->reset_due)
 145                                         {
 146                                                 current->reset_due = TIME + current->threshold;
 147                                                 current->lines_in = 0;
 148                                         }
 149
 150                                         current->lines_in++;
 151
 152                                         if (current->lines_in > current->flood)
 153                                         {
 154                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 155                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 156                                                 userrec::QuitUser(current,"Excess flood");
 157                                                 return;
 158                                         }
 159                                         else
 160                                         {
 161                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 162                                                 current->recvq = "";
 163                                         }
 164                                 }
 165                                 else
 166                                 {
 167                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 168                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 169                                         add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 170                                         apply_lines(APPLY_ZLINES);
 171                                 }
 172
 173                                 return;
 174                         }
 175
 176                         if (current->recvq.length() > (unsigned)ServerInstance->Config->NetBufferSize)
 177                         {
 178                                 if (current->registered == REG_ALL)
 179                                 {
 180                                         userrec::QuitUser(current,"RecvQ exceeded");
 181                                 }
 182                                 else
 183                                 {
 184                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 185                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 186                                         add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 187                                         apply_lines(APPLY_ZLINES);
 188                                 }
 189
 190                                 return;
 191                         }
 192
 193                         // while there are complete lines to process...
 194                         while (current->BufferIsReady())
 195                         {
 196                                 if (TIME > current->reset_due)
 197                                 {
 198                                         current->reset_due = TIME + current->threshold;
 199                                         current->lines_in = 0;
 200                                 }
 201
 202                                 if (++current->lines_in > current->flood)
 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(current,"Excess flood");
 207                                         return;
 208                                 }
 209
 210                                 if ((++floodlines > current->flood) && (current->flood != 0))
 211                                 {
 212                                         if (current->registered == REG_ALL)
 213                                         {
 214                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 215                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 216                                                 userrec::QuitUser(current,"Excess flood");
 217                                         }
 218                                         else
 219                                         {
 220                                                 add_zline(120,ServerInstance->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 221                                                 apply_lines(APPLY_ZLINES);
 222                                         }
 223
 224                                         return;
 225                                 }
 226
 227                                 // use GetBuffer to copy single lines into the sanitized string
 228                                 std::string single_line = current->GetBuffer();
 229                                 current->bytes_in += single_line.length();
 230                                 current->cmds_in++;
 231                                 if (single_line.length() > 512)
 232                                         single_line.resize(512);
 233
 234                                 userrec* old_comp = fd_ref_table[currfd];
 235
 236                                 ServerInstance->Parser->ProcessBuffer(single_line,current);
 237                                 /*
 238                                  * look for the user's record in case it's changed... if theyve quit,
 239                                  * we cant do anything more with their buffer, so bail.
 240                                  * there used to be an ugly, slow loop here. Now we have a reference
 241                                  * table, life is much easier (and FASTER)
 242                                  */
 243                                 userrec* new_comp = fd_ref_table[currfd];
 244                                 if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
 245                                 {
 246                                         return;
 247                                 }
 248                                 else
 249                                 {
 250                                         /* The user is still here, flush their buffer */
 251                                         current->FlushWriteBuf();
 252                                 }
 253                         }
 254
 255                         return;
 256                 }
 257
 258                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 259                 {
 260                         log(DEBUG,"killing: %s",cu->nick);
 261                         userrec::QuitUser(cu,strerror(errno));
 262                         return;
 263                 }
 264         }
 265
 266         // result EAGAIN means nothing read
 267         else if ((result == EAGAIN) || (result == -EAGAIN))
 268         {
 269                 /* do nothing */
 270         }
 271         else if (result == 0)
 272         {
 273                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 274                 userrec::QuitUser(cu,"Client exited");
 275                 log(DEBUG,"Bailing from client exit");
 276                 return;
 277         }
 278 }
 279
 280 void DoSocketTimeouts(time_t TIME, InspIRCd* SI)
 281 {
 282         unsigned int numsockets = SI->module_sockets.size();
 283         SocketEngine* SE = SI->SE;
 284
 285         for (std::vector<InspSocket*>::iterator a = SI->module_sockets.begin(); a < SI->module_sockets.end(); a++)
 286         {
 287                 InspSocket* s = (InspSocket*)*a;
 288                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (SI->socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 289                 {
 290                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 291                         SI->socket_ref[s->GetFd()] = NULL;
 292                         SE->DelFd(s->GetFd());
 293                         SI->module_sockets.erase(a);
 294                         s->Close();
 295                         DELETE(s);
 296                         break;
 297                 }
 298
 299                 if (SI->module_sockets.size() != numsockets)
 300                         break;
 301         }
 302 }
 303
 304 /**
 305  * This function is called once a second from the mainloop.
 306  * It is intended to do background checking on all the user structs, e.g.
 307  * stuff like ping checks, registration timeouts, etc. This function is
 308  * also responsible for checking if InspSocket derived classes are timed out.
 309  */
 310 void DoBackgroundUserStuff(time_t TIME)
 311 {
 312         CullList GlobalGoners;
 313
 314         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 315         for (unsigned long count2 = 0; count2 != local_users.size(); count2++)
 316         {
 317                 if (count2 >= local_users.size())
 318                         break;
 319
 320                 userrec* curr = local_users[count2];
 321
 322                 if (curr)
 323                 {
 324                         /*
 325                          * registration timeout -- didnt send USER/NICK/HOST
 326                          * in the time specified in their connection class.
 327                          */
 328                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 329                         {
 330                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 331                                 //ZapThisDns(curr->fd);
 332                                 GlobalGoners.AddItem(curr,"Registration timeout");
 333                                 continue;
 334                         }
 335                         /*
 336                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 337                          * say this user is ok to proceed, fully connect them.
 338                          */
 339                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 340                         {
 341                                 curr->dns_done = true;
 342                                 //ZapThisDns(curr->fd);
 343                                 ServerInstance->stats->statsDnsBad++;
 344                                 curr->FullConnect(&GlobalGoners);
 345                                 continue;
 346                         }
 347                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 348                         {
 349                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 350                                 curr->FullConnect(&GlobalGoners);
 351                                 //ZapThisDns(curr->fd);
 352                                 continue;
 353                         }
 354                         // It's time to PING this user. Send them a ping.
 355                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 356                         {
 357                                 // This user didn't answer the last ping, remove them
 358                                 if (!curr->lastping)
 359                                 {
 360                                         GlobalGoners.AddItem(curr,"Ping timeout");
 361                                         curr->lastping = 1;
 362                                         curr->nping = TIME+curr->pingmax;
 363                                         continue;
 364                                 }
 365                                 curr->Write("PING :%s",ServerInstance->Config->ServerName);
 366                                 curr->lastping = 0;
 367                                 curr->nping = TIME+curr->pingmax;
 368                         }
 369
 370                         /*
 371                          * We can flush the write buffer as the last thing we do, because if they
 372                          * match any of the above conditions its no use flushing their buffer anyway.
 373                          */
 374
 375                         curr->FlushWriteBuf();
 376                         if (*curr->GetWriteError())
 377                         {
 378                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 379                                 continue;
 380                         }
 381                 }
 382
 383         }
 384
 385
 386         /* Remove all the queued users who are due to be quit, free memory used. */
 387         GlobalGoners.Apply();
 388 }