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