src/userprocess.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 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 "inspircd_io.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 #ifdef GCC3
  32 #include <ext/hash_map>
  33 #else
  34 #include <hash_map>
  35 #endif
  36 #include <map>
  37 #include <sstream>
  38 #include <vector>
  39 #include <deque>
  40 #include <sched.h>
  41 #ifdef THREADED_DNS
  42 #include <pthread.h>
  43 #endif
  44 #include "users.h"
  45 #include "ctables.h"
  46 #include "globals.h"
  47 #include "modules.h"
  48 #include "dynamic.h"
  49 #include "wildcard.h"
  50 #include "message.h"
  51 #include "mode.h"
  52 #include "commands.h"
  53 #include "xline.h"
  54 #include "inspstring.h"
  55 #include "dnsqueue.h"
  56 #include "helperfuncs.h"
  57 #include "hashcomp.h"
  58 #include "socketengine.h"
  59 #include "typedefs.h"
  60 #include "command_parse.h"
  61
  62 extern int MODCOUNT;
  63 extern struct sockaddr_in client,server;
  64 extern socklen_t length;
  65 extern std::vector<Module*> modules;
  66 extern std::vector<ircd_module*> factory;
  67 extern std::vector<InspSocket*> module_sockets;
  68 extern time_t TIME;
  69 extern time_t OLDTIME;
  70 extern std::vector<userrec*> local_users;
  71
  72 extern InspIRCd* ServerInstance;
  73 extern ServerConfig *Config;
  74 extern userrec* fd_ref_table[65536];
  75 char data[65536];
  76
  77 extern user_hash clientlist;
  78 extern chan_hash chanlist;
  79
  80 void ProcessUser(userrec* cu)
  81 {
  82         int result = EAGAIN;
  83         log(DEBUG,"Processing user with fd %d",cu->fd);
  84         if (Config->GetIOHook(cu->port))
  85         {
  86                 int result2 = 0;
  87                 int MOD_RESULT = Config->GetIOHook(cu->port)->OnRawSocketRead(cu->fd,data,65535,result2);
  88                 log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
  89                 if (MOD_RESULT < 0)
  90                 {
  91                         result = EAGAIN;
  92                 }
  93                 else
  94                 {
  95                         result = result2;
  96                 }
  97         }
  98         else
  99         {
 100                 result = cu->ReadData(data, 65535);
 101         }
 102         log(DEBUG,"Read result: %d",result);
 103         if (result)
 104         {
 105                 ServerInstance->stats->statsRecv += result;
 106                 // perform a check on the raw buffer as an array (not a string!) to remove
 107                 // characters 0 and 7 which are illegal in the RFC - replace them with spaces.
 108                 // hopefully this should stop even more people whining about "Unknown command: *"
 109                 for (int checker = 0; checker < result; checker++)
 110                 {
 111                         if ((data[checker] == 0) || (data[checker] == 7))
 112                                 data[checker] = ' ';
 113                 }
 114                 if (result > 0)
 115                         data[result] = '\0';
 116                 userrec* current = cu;
 117                 int currfd = current->fd;
 118                 int floodlines = 0;
 119                 // add the data to the users buffer
 120                 if (result > 0)
 121                 {
 122                         if (!current->AddBuffer(data))
 123                         {
 124                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 125                                 if (current->registered == 7)
 126                                 {
 127                                         kill_link(current,"RecvQ exceeded");
 128                                 }
 129                                 else
 130                                 {
 131                                         WriteOpers("*** Excess flood from %s",current->ip);
 132                                         log(DEFAULT,"Excess flood from: %s",current->ip);
 133                                         add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
 134                                         apply_lines(APPLY_ZLINES);
 135                                 }
 136                                 return;
 137                         }
 138                         if (current->recvq.length() > (unsigned)Config->NetBufferSize)
 139                         {
 140                                 if (current->registered == 7)
 141                                 {
 142                                         kill_link(current,"RecvQ exceeded");
 143                                 }
 144                                 else
 145                                 {
 146                                         WriteOpers("*** Excess flood from %s",current->ip);
 147                                         log(DEFAULT,"Excess flood from: %s",current->ip);
 148                                         add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
 149                                         apply_lines(APPLY_ZLINES);
 150                                 }
 151                                 return;
 152                         }
 153                         // while there are complete lines to process...
 154                         while (current->BufferIsReady())
 155                         {
 156                                 floodlines++;
 157                                 if (TIME > current->reset_due)
 158                                 {
 159                                         current->reset_due = TIME + current->threshold;
 160                                         current->lines_in = 0;
 161                                 }
 162                                 current->lines_in++;
 163                                 if (current->lines_in > current->flood)
 164                                 {
 165                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 166                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 167                                         kill_link(current,"Excess flood");
 168                                         return;
 169                                 }
 170                                 if ((floodlines > current->flood) && (current->flood != 0))
 171                                 {
 172                                         if (current->registered == 7)
 173                                         {
 174                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 175                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 176                                                 kill_link(current,"Excess flood");
 177                                         }
 178                                         else
 179                                         {
 180                                                 add_zline(120,Config->ServerName,"Flood from unregistered connection",current->ip);
 181                                                 apply_lines(APPLY_ZLINES);
 182                                         }
 183                                         return;
 184                                 }
 185                                 char sanitized[MAXBUF];
 186                                 // use GetBuffer to copy single lines into the sanitized string
 187                                 std::string single_line = current->GetBuffer();
 188                                 current->bytes_in += single_line.length();
 189                                 current->cmds_in++;
 190                                 if (single_line.length()>512)
 191                                 {
 192                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 193                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 194                                         kill_link(current,"Excess flood");
 195                                         return;
 196                                 }
 197                                 strlcpy(sanitized,single_line.c_str(),MAXBUF);
 198                                 if (*sanitized)
 199                                 {
 200                                         userrec* old_comp = fd_ref_table[currfd];
 201                                         // we're gonna re-scan to check if the nick is gone, after every
 202                                         // command - if it has, we're gonna bail
 203                                         ServerInstance->Parser->ProcessBuffer(sanitized,current);
 204                                         // look for the user's record in case it's changed... if theyve quit,
 205                                         // we cant do anything more with their buffer, so bail.
 206                                         // there used to be an ugly, slow loop here. Now we have a reference
 207                                         // table, life is much easier (and FASTER)
 208                                         userrec* new_comp = fd_ref_table[currfd];
 209                                         if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
 210                                         {
 211                                                 return;
 212                                         }
 213                                         else
 214                                         {
 215                                                 /* The user is still here, flush their buffer */
 216                                                 current->FlushWriteBuf();
 217                                         }
 218                                 }
 219                         }
 220                         return;
 221                 }
 222                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 223                 {
 224                         log(DEBUG,"killing: %s",cu->nick);
 225                         kill_link(cu,strerror(errno));
 226                         return;
 227                 }
 228         }
 229         // result EAGAIN means nothing read
 230         else if (result == EAGAIN)
 231         {
 232         }
 233         else if (result == 0)
 234         {
 235                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 236                 kill_link(cu,"Client exited");
 237                 log(DEBUG,"Bailing from client exit");
 238                 return;
 239         }
 240 }
 241
 242
 243 /**
 244  * This function is called once a second from the mainloop.
 245  * It is intended to do background checking on all the user structs, e.g.
 246  * stuff like ping checks, registration timeouts, etc.
 247  * The function returns false when it is finished, and true if
 248  * it needs to be run again (e.g. it has processed one of a batch of
 249  * QUIT messages, but couldnt continue iterating because the iterator
 250  * became invalid). This function is also responsible for checking
 251  * if InspSocket derived classes are timed out.
 252  */
 253 bool DoBackgroundUserStuff(time_t TIME)
 254 {
 255         unsigned int numsockets = module_sockets.size();
 256         SocketEngine* SE = ServerInstance->SE;
 257         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 258         {
 259                 InspSocket* s = (InspSocket*)*a;
 260                 if (s->Timeout(TIME))
 261                 {
 262                         log(DEBUG,"Socket poll returned false, close and bail");
 263                         SE->DelFd(s->GetFd());
 264                         s->Close();
 265                         module_sockets.erase(a);
 266                         delete s;
 267                         break;
 268                 }
 269                 if (module_sockets.size() != numsockets) break;
 270         }
 271         /* TODO: We need a seperate hash containing only local users for this
 272          */
 273         for (std::vector<userrec*>::iterator count2 = local_users.begin(); count2 != local_users.end(); count2++)
 274         {
 275                 /* Sanity checks for corrupted iterators (yes, really) */
 276                 userrec* curr = NULL;
 277                 if (*count2)
 278                         curr = (userrec*)(*count2);
 279                 if ((long)curr == -1)
 280                         return false;
 281
 282                 if ((curr) && (curr->fd != 0)) /* XXX - why are we checking fd != 0? --w00t */
 283                 {
 284                         int currfd = curr->fd;
 285                         // we don't check the state of remote users.
 286                         if (IS_LOCAL(curr))
 287                         {
 288                                 curr->FlushWriteBuf();
 289                                 if (curr->GetWriteError() != "")
 290                                 {
 291                                         log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str());
 292                                         kill_link(curr,curr->GetWriteError().c_str());
 293                                         return true;
 294                                 }
 295                                 // registration timeout -- didnt send USER/NICK/HOST in the time specified in
 296                                 // their connection class.
 297                                 if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7))
 298                                 {
 299                                         log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 300                                         kill_link(curr,"Registration timeout");
 301                                         return true;
 302                                 }
 303                                 if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
 304                                 {
 305                                         log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon);
 306                                         curr->dns_done = true;
 307                                         ServerInstance->stats->statsDnsBad++;
 308                                         FullConnectUser(curr);
 309                                         if (fd_ref_table[currfd] != curr) // something changed, bail pronto
 310                                                 return true;
 311                                  }
 312                                  if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr)))
 313                                  {
 314                                        log(DEBUG,"dns done, registered=3, and modules ready, OK");
 315                                        FullConnectUser(curr);
 316                                        if (fd_ref_table[currfd] != curr) // something changed, bail pronto
 317                                                 return true;
 318                                  }
 319                                  if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
 320                                  {
 321                                        if ((!curr->lastping) && (curr->registered == 7))
 322                                        {
 323                                                log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
 324                                                kill_link(curr,"Ping timeout");
 325                                                return true;
 326                                        }
 327                                        Write(curr->fd,"PING :%s",Config->ServerName);
 328                                        log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
 329                                        curr->lastping = 0;
 330                                        curr->nping = TIME+curr->pingmax;       // was hard coded to 120
 331                                 }
 332                         }
 333                 }
 334         }
 335         return false;
 336 }
 337
 338 void OpenLog(char** argv, int argc)
 339 {
 340         std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log";
 341         Config->log_file = fopen(logpath.c_str(),"a+");
 342         if (!Config->log_file)
 343         {
 344                 printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str());
 345                 Exit(ERROR);
 346         }
 347 #ifdef IS_CYGWIN
 348         printf("Logging to ircd.log...\n");
 349 #else
 350         printf("Logging to %s...\n",logpath.c_str());
 351 #endif
 352 }
 353
 354
 355 void CheckRoot()
 356 {
 357         if (geteuid() == 0)
 358         {
 359                 printf("WARNING!!! You are running an irc server as ROOT!!! DO NOT DO THIS!!!\n\n");
 360                 log(DEFAULT,"InspIRCd: startup: not starting with UID 0!");
 361                 Exit(ERROR);
 362         }
 363 }
 364
 365
 366 void CheckDie()
 367 {
 368         if (*Config->DieValue)
 369         {
 370                 printf("WARNING: %s\n\n",Config->DieValue);
 371                 log(DEFAULT,"Ut-Oh, somebody didn't read their config file: '%s'",Config->DieValue);
 372                 exit(0);
 373         }
 374 }
 375
 376 void LoadAllModules(InspIRCd* ServerInstance)
 377 {
 378         /* We must load the modules AFTER initializing the socket engine, now */
 379         MODCOUNT = -1;
 380         char configToken[MAXBUF];
 381         for (int count = 0; count < Config->ConfValueEnum("module",&Config->config_f); count++)
 382         {
 383                 Config->ConfValue("module","name",count,configToken,&Config->config_f);
 384                 printf("Loading module... \033[1;32m%s\033[0m\n",configToken);
 385                 if (!ServerInstance->LoadModule(configToken))
 386                 {
 387                         log(DEFAULT,"Exiting due to a module loader error.");
 388                         printf("\nThere was an error loading a module: %s\n\nYou might want to do './inspircd start' instead of 'bin/inspircd'\n\n",ServerInstance->ModuleError());
 389                         Exit(0);
 390                 }
 391         }
 392         log(DEFAULT,"Total loaded modules: %lu",(unsigned long)MODCOUNT+1);
 393 }
 394
 395