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 ServerConfig *Config;
  67 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  68 char data[65536];
  69
  70 extern user_hash clientlist;
  71 extern chan_hash chanlist;
  72
  73 void ProcessUser(userrec* cu)
  74 {
  75         int result = EAGAIN;
  76
  77         if (cu->fd == FD_MAGIC_NUMBER)
  78                 return;
  79
  80         log(DEBUG,"Processing user with fd %d",cu->fd);
  81
  82         if (Config->GetIOHook(cu->GetPort()))
  83         {
  84                 int result2 = 0;
  85                 int MOD_RESULT = 0;
  86
  87                 try
  88                 {
  89                         MOD_RESULT = Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->fd,data,65535,result2);
  90                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  91                 }
  92                 catch (ModuleException& modexcept)
  93                 {
  94                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
  95                 }
  96
  97                 if (MOD_RESULT < 0)
  98                 {
  99                         result = -EAGAIN;
 100                 }
 101                 else
 102                 {
 103                         result = result2;
 104                 }
 105         }
 106         else
 107         {
 108                 result = cu->ReadData(data, 65535);
 109         }
 110
 111         log(DEBUG,"Read result: %d",result);
 112
 113         if ((result) && (result != -EAGAIN))
 114         {
 115                 userrec *current;
 116                 int currfd;
 117                 int floodlines = 0;
 118
 119                 ServerInstance->stats->statsRecv += result;
 120                 /*
 121                  * perform a check on the raw buffer as an array (not a string!) to remove
 122                  * character 0 which is illegal in the RFC - replace them with spaces.
 123                  * XXX - no garauntee there's not \0's in the middle of the data,
 124                  *       and no reason for it to be terminated either. -- Om
 125                  */
 126
 127                 for (int checker = 0; checker < result; checker++)
 128                 {
 129                         if (data[checker] == 0)
 130                                 data[checker] = ' ';
 131                 }
 132
 133                 if (result > 0)
 134                         data[result] = '\0';
 135
 136                 current = cu;
 137                 currfd = current->fd;
 138
 139                 // add the data to the users buffer
 140                 if (result > 0)
 141                 {
 142                         if (!current->AddBuffer(data))
 143                         {
 144                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 145                                 if (current->registered == REG_ALL)
 146                                 {
 147                                         // Make sure they arn't flooding long lines.
 148                                         if (TIME > current->reset_due)
 149                                         {
 150                                                 current->reset_due = TIME + current->threshold;
 151                                                 current->lines_in = 0;
 152                                         }
 153
 154                                         current->lines_in++;
 155
 156                                         if (current->lines_in > current->flood)
 157                                         {
 158                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 159                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 160                                                 userrec::QuitUser(current,"Excess flood");
 161                                                 return;
 162                                         }
 163                                         else
 164                                         {
 165                                                 WriteServ(currfd, "NOTICE %s :Your previous line was too long and was not delivered (Over 512chars) Please shorten it.", current->nick);
 166                                                 current->recvq = "";
 167                                         }
 168                                 }
 169                                 else
 170                                 {
 171                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 172                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 173                                         add_zline(120,Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 174                                         apply_lines(APPLY_ZLINES);
 175                                 }
 176
 177                                 return;
 178                         }
 179
 180                         if (current->recvq.length() > (unsigned)Config->NetBufferSize)
 181                         {
 182                                 if (current->registered == REG_ALL)
 183                                 {
 184                                         userrec::QuitUser(current,"RecvQ exceeded");
 185                                 }
 186                                 else
 187                                 {
 188                                         WriteOpers("*** Excess flood from %s",current->GetIPString());
 189                                         log(DEFAULT,"Excess flood from: %s",current->GetIPString());
 190                                         add_zline(120,Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 191                                         apply_lines(APPLY_ZLINES);
 192                                 }
 193
 194                                 return;
 195                         }
 196
 197                         // while there are complete lines to process...
 198                         while (current->BufferIsReady())
 199                         {
 200                                 if (TIME > current->reset_due)
 201                                 {
 202                                         current->reset_due = TIME + current->threshold;
 203                                         current->lines_in = 0;
 204                                 }
 205
 206                                 if (++current->lines_in > current->flood)
 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(current,"Excess flood");
 211                                         return;
 212                                 }
 213
 214                                 if ((++floodlines > current->flood) && (current->flood != 0))
 215                                 {
 216                                         if (current->registered == REG_ALL)
 217                                         {
 218                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 219                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 220                                                 userrec::QuitUser(current,"Excess flood");
 221                                         }
 222                                         else
 223                                         {
 224                                                 add_zline(120,Config->ServerName,"Flood from unregistered connection",current->GetIPString());
 225                                                 apply_lines(APPLY_ZLINES);
 226                                         }
 227
 228                                         return;
 229                                 }
 230
 231                                 // use GetBuffer to copy single lines into the sanitized string
 232                                 std::string single_line = current->GetBuffer();
 233                                 current->bytes_in += single_line.length();
 234                                 current->cmds_in++;
 235                                 if (single_line.length() > 512)
 236                                         single_line.resize(512);
 237
 238                                 userrec* old_comp = fd_ref_table[currfd];
 239
 240                                 ServerInstance->Parser->ProcessBuffer(single_line,current);
 241                                 /*
 242                                  * look for the user's record in case it's changed... if theyve quit,
 243                                  * we cant do anything more with their buffer, so bail.
 244                                  * there used to be an ugly, slow loop here. Now we have a reference
 245                                  * table, life is much easier (and FASTER)
 246                                  */
 247                                 userrec* new_comp = fd_ref_table[currfd];
 248                                 if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
 249                                 {
 250                                         return;
 251                                 }
 252                                 else
 253                                 {
 254                                         /* The user is still here, flush their buffer */
 255                                         current->FlushWriteBuf();
 256                                 }
 257                         }
 258
 259                         return;
 260                 }
 261
 262                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 263                 {
 264                         log(DEBUG,"killing: %s",cu->nick);
 265                         userrec::QuitUser(cu,strerror(errno));
 266                         return;
 267                 }
 268         }
 269
 270         // result EAGAIN means nothing read
 271         else if ((result == EAGAIN) || (result == -EAGAIN))
 272         {
 273                 /* do nothing */
 274         }
 275         else if (result == 0)
 276         {
 277                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 278                 userrec::QuitUser(cu,"Client exited");
 279                 log(DEBUG,"Bailing from client exit");
 280                 return;
 281         }
 282 }
 283
 284 void DoSocketTimeouts(time_t TIME)
 285 {
 286         unsigned int numsockets = module_sockets.size();
 287         SocketEngine* SE = ServerInstance->SE;
 288
 289         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 290         {
 291                 InspSocket* s = (InspSocket*)*a;
 292                 if ((s) && (s->GetFd() >= 0) && (s->GetFd() < MAX_DESCRIPTORS) && (socket_ref[s->GetFd()] != NULL) && (s->Timeout(TIME)))
 293                 {
 294                         log(DEBUG,"userprocess.cpp: Socket poll returned false, close and bail");
 295                         socket_ref[s->GetFd()] = NULL;
 296                         SE->DelFd(s->GetFd());
 297                         module_sockets.erase(a);
 298                         s->Close();
 299                         DELETE(s);
 300                         break;
 301                 }
 302
 303                 if (module_sockets.size() != numsockets)
 304                         break;
 305         }
 306 }
 307
 308 /**
 309  * This function is called once a second from the mainloop.
 310  * It is intended to do background checking on all the user structs, e.g.
 311  * stuff like ping checks, registration timeouts, etc. This function is
 312  * also responsible for checking if InspSocket derived classes are timed out.
 313  */
 314 void DoBackgroundUserStuff(time_t TIME)
 315 {
 316         CullList GlobalGoners;
 317
 318         /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 319         for (unsigned long count2 = 0; count2 != local_users.size(); count2++)
 320         {
 321                 if (count2 >= local_users.size())
 322                         break;
 323
 324                 userrec* curr = local_users[count2];
 325
 326                 if (curr)
 327                 {
 328                         /*
 329                          * registration timeout -- didnt send USER/NICK/HOST
 330                          * in the time specified in their connection class.
 331                          */
 332                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != REG_ALL))
 333                         {
 334                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 335                                 //ZapThisDns(curr->fd);
 336                                 GlobalGoners.AddItem(curr,"Registration timeout");
 337                                 continue;
 338                         }
 339                         /*
 340                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 341                          * say this user is ok to proceed, fully connect them.
 342                          */
 343                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 344                         {
 345                                 curr->dns_done = true;
 346                                 //ZapThisDns(curr->fd);
 347                                 ServerInstance->stats->statsDnsBad++;
 348                                 FullConnectUser(curr,&GlobalGoners);
 349                                 continue;
 350                         }
 351                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (AllModulesReportReady(curr)))
 352                         {
 353                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
 354                                 FullConnectUser(curr,&GlobalGoners);
 355                                 //ZapThisDns(curr->fd);
 356                                 continue;
 357                         }
 358                         // It's time to PING this user. Send them a ping.
 359                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 360                         {
 361                                 // This user didn't answer the last ping, remove them
 362                                 if (!curr->lastping)
 363                                 {
 364                                         GlobalGoners.AddItem(curr,"Ping timeout");
 365                                         curr->lastping = 1;
 366                                         curr->nping = TIME+curr->pingmax;
 367                                         continue;
 368                                 }
 369                                 Write(curr->fd,"PING :%s",Config->ServerName);
 370                                 curr->lastping = 0;
 371                                 curr->nping = TIME+curr->pingmax;
 372                         }
 373
 374                         /*
 375                          * We can flush the write buffer as the last thing we do, because if they
 376                          * match any of the above conditions its no use flushing their buffer anyway.
 377                          */
 378
 379                         curr->FlushWriteBuf();
 380                         if (*curr->GetWriteError())
 381                         {
 382                                 GlobalGoners.AddItem(curr,curr->GetWriteError());
 383                                 continue;
 384                         }
 385                 }
 386
 387         }
 388
 389
 390         /* Remove all the queued users who are due to be quit, free memory used. */
 391         GlobalGoners.Apply();
 392 }