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