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