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 "inspircd_util.h"
  25 #include <unistd.h>
  26 #include <fcntl.h>
  27 #include <sys/errno.h>
  28 #include <sys/ioctl.h>
  29 #include <sys/utsname.h>
  30 #include <time.h>
  31 #include <string>
  32 #ifdef GCC3
  33 #include <ext/hash_map>
  34 #else
  35 #include <hash_map>
  36 #endif
  37 #include <map>
  38 #include <sstream>
  39 #include <vector>
  40 #include <deque>
  41 #include <sched.h>
  42 #ifdef THREADED_DNS
  43 #include <pthread.h>
  44 #endif
  45 #include "users.h"
  46 #include "ctables.h"
  47 #include "globals.h"
  48 #include "modules.h"
  49 #include "dynamic.h"
  50 #include "wildcard.h"
  51 #include "message.h"
  52 #include "mode.h"
  53 #include "commands.h"
  54 #include "xline.h"
  55 #include "inspstring.h"
  56 #include "dnsqueue.h"
  57 #include "helperfuncs.h"
  58 #include "hashcomp.h"
  59 #include "socketengine.h"
  60
  61 extern int MODCOUNT;
  62 extern int openSockfd[MAXSOCKS];
  63 extern bool nofork;
  64 extern bool unlimitcore;
  65 extern struct sockaddr_in client,server;
  66 extern char addrs[MAXBUF][255];
  67 extern socklen_t length;
  68 extern char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
  69
  70 extern char DisabledCommands[MAXBUF];
  71
  72 extern bool AllowHalfop;
  73 extern bool AllowProtect;
  74 extern bool AllowFounder;
  75
  76 extern std::vector<Module*> modules;
  77 extern std::vector<std::string> module_names;
  78 extern std::vector<ircd_module*> factory;
  79
  80 extern std::vector<InspSocket*> module_sockets;
  81
  82 extern SocketEngine* SE;
  83
  84 extern time_t TIME;
  85 extern time_t OLDTIME;
  86
  87 extern int DieDelay;
  88 extern time_t startup_time;
  89 extern int NetBufferSize;
  90 extern int MaxConn;
  91 extern unsigned int SoftLimit;
  92 extern int MaxWhoResults;
  93 extern time_t nb_start;
  94 extern int dns_timeout;
  95
  96 extern int statsAccept, statsRefused, statsUnknown, statsCollisions, statsDns, statsDnsGood, statsDnsBad, statsConnects, statsSent, statsRecv;
  97
  98 extern userrec* fd_ref_table[65536];
  99
 100 extern int LogLevel;
 101 extern char ServerName[MAXBUF];
 102 extern char Network[MAXBUF];
 103 extern char ServerDesc[MAXBUF];
 104 extern char AdminName[MAXBUF];
 105 extern char AdminEmail[MAXBUF];
 106 extern char AdminNick[MAXBUF];
 107 extern char diepass[MAXBUF];
 108 extern char restartpass[MAXBUF];
 109 extern char motd[MAXBUF];
 110 extern char rules[MAXBUF];
 111 extern char list[MAXBUF];
 112 extern char PrefixQuit[MAXBUF];
 113 extern char DieValue[MAXBUF];
 114 extern char DNSServer[MAXBUF];
 115 extern char data[65536];
 116
 117
 118 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
 119 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
 120 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, irc::InAddr_HashComp> address_cache;
 121 typedef nspace::hash_map<std::string, WhoWasUser*, nspace::hash<string>, irc::StrHashComp> whowas_hash;
 122
 123 extern user_hash clientlist;
 124 extern chan_hash chanlist;
 125 extern whowas_hash whowas;
 126
 127 extern FILE *log_file;
 128 extern std::stringstream config_f;
 129
 130 void ProcessUser(userrec* cu)
 131 {
 132         int result = EAGAIN;
 133         log(DEBUG,"Processing user with fd %d",cu->fd);
 134         int MOD_RESULT = 0;
 135         int result2 = 0;
 136         FOREACH_RESULT(OnRawSocketRead(cu->fd,data,65535,result2));
 137         if (!MOD_RESULT)
 138         {
 139                 result = cu->ReadData(data, 65535);
 140         }
 141         else
 142         {
 143                 log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
 144                 result = result2;
 145         }
 146         log(DEBUG,"Read result: %d",result);
 147         if (result)
 148         {
 149                 statsRecv += result;
 150                 // perform a check on the raw buffer as an array (not a string!) to remove
 151                 // characters 0 and 7 which are illegal in the RFC - replace them with spaces.
 152                 // hopefully this should stop even more people whining about "Unknown command: *"
 153                 for (int checker = 0; checker < result; checker++)
 154                 {
 155                         if ((data[checker] == 0) || (data[checker] == 7))
 156                                 data[checker] = ' ';
 157                 }
 158                 if (result > 0)
 159                         data[result] = '\0';
 160                 userrec* current = cu;
 161                 int currfd = current->fd;
 162                 int floodlines = 0;
 163                 // add the data to the users buffer
 164                 if (result > 0)
 165                 {
 166                         if (!current->AddBuffer(data))
 167                         {
 168                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 169                                 if (current->registered == 7)
 170                                 {
 171                                         kill_link(current,"RecvQ exceeded");
 172                                 }
 173                                 else
 174                                 {
 175                                         WriteOpers("*** Excess flood from %s",current->ip);
 176                                         log(DEFAULT,"Excess flood from: %s",current->ip);
 177                                         add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
 178                                         apply_lines();
 179                                 }
 180                                 return;
 181                         }
 182                         if (current->recvq.length() > (unsigned)NetBufferSize)
 183                         {
 184                                 if (current->registered == 7)
 185                                 {
 186                                         kill_link(current,"RecvQ exceeded");
 187                                 }
 188                                 else
 189                                 {
 190                                         WriteOpers("*** Excess flood from %s",current->ip);
 191                                         log(DEFAULT,"Excess flood from: %s",current->ip);
 192                                         add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
 193                                         apply_lines();
 194                                 }
 195                                 return;
 196                         }
 197                         // while there are complete lines to process...
 198                         while (current->BufferIsReady())
 199                         {
 200                                 floodlines++;
 201                                 if (TIME > current->reset_due)
 202                                 {
 203                                         current->reset_due = TIME + current->threshold;
 204                                         current->lines_in = 0;
 205                                 }
 206                                 current->lines_in++;
 207                                 if (current->lines_in > current->flood)
 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                                         kill_link(current,"Excess flood");
 212                                         return;
 213                                 }
 214                                 if ((floodlines > current->flood) && (current->flood != 0))
 215                                 {
 216                                         if (current->registered == 7)
 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                                                 kill_link(current,"Excess flood");
 221                                         }
 222                                         else
 223                                         {
 224                                                 add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
 225                                                 apply_lines();
 226                                         }
 227                                         return;
 228                                 }
 229                                 char sanitized[MAXBUF];
 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                                 {
 236                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 237                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
 238                                         kill_link(current,"Excess flood");
 239                                         return;
 240                                 }
 241                                 strlcpy(sanitized,single_line.c_str(),MAXBUF);
 242                                 if (*sanitized)
 243                                 {
 244                                         userrec* old_comp = fd_ref_table[currfd];
 245                                         // we're gonna re-scan to check if the nick is gone, after every
 246                                         // command - if it has, we're gonna bail
 247                                         process_buffer(sanitized,current);
 248                                         // look for the user's record in case it's changed... if theyve quit,
 249                                         // we cant do anything more with their buffer, so bail.
 250                                         // there used to be an ugly, slow loop here. Now we have a reference
 251                                         // table, life is much easier (and FASTER)
 252                                         userrec* new_comp = fd_ref_table[currfd];
 253                                         if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
 254                                         {
 255                                                 return;
 256                                         }
 257                                         else
 258                                         {
 259                                                 /* The user is still here, flush their buffer */
 260                                                 current->FlushWriteBuf();
 261                                         }
 262                                 }
 263                         }
 264                         return;
 265                 }
 266                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 267                 {
 268                         log(DEBUG,"killing: %s",cu->nick);
 269                         kill_link(cu,strerror(errno));
 270                         return;
 271                 }
 272         }
 273         // result EAGAIN means nothing read
 274         else if (result == EAGAIN)
 275         {
 276         }
 277         else if (result == 0)
 278         {
 279                 log(DEBUG,"InspIRCd: Exited: %s",cu->nick);
 280                 kill_link(cu,"Client exited");
 281                 log(DEBUG,"Bailing from client exit");
 282                 return;
 283         }
 284 }
 285
 286
 287 /**
 288  * This function is called once a second from the mainloop.
 289  * It is intended to do background checking on all the user structs, e.g.
 290  * stuff like ping checks, registration timeouts, etc.
 291  * The function returns false when it is finished, and true if
 292  * it needs to be run again (e.g. it has processed one of a batch of
 293  * QUIT messages, but couldnt continue iterating because the iterator
 294  * became invalid). This function is also responsible for checking
 295  * if InspSocket derived classes are timed out.
 296  */
 297 bool DoBackgroundUserStuff(time_t TIME)
 298 {
 299         unsigned int numsockets = module_sockets.size();
 300         for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
 301         {
 302                 InspSocket* s = (InspSocket*)*a;
 303                 if (s->Timeout(TIME))
 304                 {
 305                         log(DEBUG,"Socket poll returned false, close and bail");
 306                         SE->DelFd(s->GetFd());
 307                         s->Close();
 308                         module_sockets.erase(a);
 309                         delete s;
 310                         break;
 311                 }
 312                 if (module_sockets.size() != numsockets) break;
 313         }
 314         /* TODO: We need a seperate hash containing only local users for this
 315          */
 316         for (user_hash::iterator count2 = clientlist.begin(); count2 != clientlist.end(); count2++)
 317         {
 318                 /* Sanity checks for corrupted iterators (yes, really) */
 319                 userrec* curr = NULL;
 320                 if (count2->second)
 321                         curr = count2->second;
 322                 if ((long)curr == -1)
 323                         return false;
 324
 325                 if ((curr) && (curr->fd != 0)) /* XXX - why are we checking fd != 0? --w00t */
 326                 {
 327                         int currfd = curr->fd;
 328                         // we don't check the state of remote users.
 329                         if (IS_LOCAL(curr))
 330                         {
 331                                 curr->FlushWriteBuf();
 332                                 if (curr->GetWriteError() != "")
 333                                 {
 334                                         log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str());
 335                                         kill_link(curr,curr->GetWriteError().c_str());
 336                                         return true;
 337                                 }
 338                                 // registration timeout -- didnt send USER/NICK/HOST in the time specified in
 339                                 // their connection class.
 340                                 if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7))
 341                                 {
 342                                         log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
 343                                         kill_link(curr,"Registration timeout");
 344                                         return true;
 345                                 }
 346                                 if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
 347                                 {
 348                                         log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon);
 349                                         curr->dns_done = true;
 350                                         statsDnsBad++;
 351                                         FullConnectUser(curr);
 352                                         if (fd_ref_table[currfd] != curr) // something changed, bail pronto
 353                                                 return true;
 354                                  }
 355                                  if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr)))
 356                                  {
 357                                        log(DEBUG,"dns done, registered=3, and modules ready, OK");
 358                                        FullConnectUser(curr);
 359                                        if (fd_ref_table[currfd] != curr) // something changed, bail pronto
 360                                                 return true;
 361                                  }
 362                                  if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
 363                                  {
 364                                        if ((!curr->lastping) && (curr->registered == 7))
 365                                        {
 366                                                log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
 367                                                kill_link(curr,"Ping timeout");
 368                                                return true;
 369                                        }
 370                                        Write(curr->fd,"PING :%s",ServerName);
 371                                        log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
 372                                        curr->lastping = 0;
 373                                        curr->nping = TIME+curr->pingmax;       // was hard coded to 120
 374                                 }
 375                         }
 376                 }
 377         }
 378         return false;
 379 }
 380
 381 void OpenLog(char** argv, int argc)
 382 {
 383         std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log";
 384         log_file = fopen(logpath.c_str(),"a+");
 385         if (!log_file)
 386         {
 387                 printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str());
 388                 Exit(ERROR);
 389         }
 390 #ifdef IS_CYGWIN
 391         printf("Logging to ircd.log...\n");
 392 #else
 393         printf("Logging to %s...\n",logpath.c_str());
 394 #endif
 395 }
 396
 397
 398 void CheckRoot()
 399 {
 400         if (geteuid() == 0)
 401         {
 402                 printf("WARNING!!! You are running an irc server as ROOT!!! DO NOT DO THIS!!!\n\n");
 403                 log(DEFAULT,"InspIRCd: startup: not starting with UID 0!");
 404                 Exit(ERROR);
 405         }
 406 }
 407
 408
 409 void CheckDie()
 410 {
 411         if (DieValue[0])
 412         {
 413                 printf("WARNING: %s\n\n",DieValue);
 414                 log(DEFAULT,"Ut-Oh, somebody didn't read their config file: '%s'",DieValue);
 415                 exit(0);
 416         }
 417 }
 418
 419 void LoadAllModules()
 420 {
 421         /* We must load the modules AFTER initializing the socket engine, now */
 422         MODCOUNT = -1;
 423         for (int count = 0; count < ConfValueEnum("module",&config_f); count++)
 424         {
 425                 ConfValue("module","name",count,configToken,&config_f);
 426                 printf("Loading module... \033[1;32m%s\033[0m\n",configToken);
 427                 if (!LoadModule(configToken))
 428                 {
 429                         log(DEFAULT,"Exiting due to a module loader error.");
 430                         printf("\nThere was an error loading a module: %s\n\nYou might want to do './inspircd start' instead of 'bin/inspircd'\n\n",ModuleError());
 431                         Exit(0);
 432                 }
 433         }
 434         log(DEFAULT,"Total loaded modules: %lu",(unsigned long)MODCOUNT+1);
 435 }
 436
 437