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