src/inspircd.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 "userprocess.h"
  61 #include "socket.h"
  62 #include "dns.h"
  63
  64 int LogLevel = DEFAULT;
  65 char ServerName[MAXBUF];
  66 char Network[MAXBUF];
  67 char ServerDesc[MAXBUF];
  68 char AdminName[MAXBUF];
  69 char AdminEmail[MAXBUF];
  70 char AdminNick[MAXBUF];
  71 char diepass[MAXBUF];
  72 char restartpass[MAXBUF];
  73 char motd[MAXBUF];
  74 char rules[MAXBUF];
  75 char list[MAXBUF];
  76 char PrefixQuit[MAXBUF];
  77 char DieValue[MAXBUF];
  78 char DNSServer[MAXBUF];
  79 char data[65536];
  80 int debugging =  0;
  81 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  82 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  83 int DieDelay  =  5;
  84 time_t startup_time = time(NULL);
  85 int NetBufferSize = 10240;      // NetBufferSize used as the buffer size for all read() ops
  86 int MaxConn = SOMAXCONN;        // size of accept() backlog (128 by default on *BSD)
  87 unsigned int SoftLimit = MAXCLIENTS;
  88 extern int MaxWhoResults;
  89 time_t nb_start = 0;
  90 int dns_timeout = 5;
  91
  92 char DisabledCommands[MAXBUF];
  93
  94 bool AllowHalfop = true;
  95 bool AllowProtect = true;
  96 bool AllowFounder = true;
  97
  98 extern std::vector<Module*> modules;
  99 std::vector<std::string> module_names;
 100 extern std::vector<ircd_module*> factory;
 101
 102 std::vector<InspSocket*> module_sockets;
 103
 104 extern int MODCOUNT;
 105 int openSockfd[MAXSOCKS];
 106 bool nofork = false;
 107 bool unlimitcore = false;
 108 struct sockaddr_in client,server;
 109 char addrs[MAXBUF][255];
 110 socklen_t length;
 111 char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
 112
 113 extern InspSocket* socket_ref[65535];
 114
 115 time_t TIME = time(NULL), OLDTIME = time(NULL);
 116
 117 SocketEngine* SE = NULL;
 118
 119 bool has_been_netsplit = false;
 120 extern std::vector<std::string> include_stack;
 121
 122 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
 123 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
 124 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, irc::InAddr_HashComp> address_cache;
 125 typedef nspace::hash_map<std::string, WhoWasUser*, nspace::hash<string>, irc::StrHashComp> whowas_hash;
 126 typedef std::deque<command_t> command_table;
 127 typedef std::map<std::string,time_t> autoconnects;
 128 typedef std::vector<std::string> servernamelist;
 129
 130 // This table references users by file descriptor.
 131 // its an array to make it VERY fast, as all lookups are referenced
 132 // by an integer, meaning there is no need for a scan/search operation.
 133 userrec* fd_ref_table[65536];
 134
 135 int statsAccept = 0, statsRefused = 0, statsUnknown = 0, statsCollisions = 0, statsDns = 0, statsDnsGood = 0, statsDnsBad = 0, statsConnects = 0, statsSent= 0, statsRecv = 0;
 136
 137 Server* MyServer = new Server;
 138
 139 FILE *log_file;
 140
 141 user_hash clientlist;
 142 chan_hash chanlist;
 143 whowas_hash whowas;
 144 command_table cmdlist;
 145 autoconnects autoconns;
 146 file_cache MOTD;
 147 file_cache RULES;
 148 address_cache IP;
 149
 150 ClassVector Classes;
 151 servernamelist servernames;
 152
 153 struct linger linger = { 0 };
 154 char MyExecutable[1024];
 155 int boundPortCount = 0;
 156 int portCount = 0, SERVERportCount = 0, ports[MAXSOCKS];
 157
 158 char ModPath[MAXBUF];
 159
 160 /* prototypes */
 161
 162 int has_channel(userrec *u, chanrec *c);
 163 int usercount(chanrec *c);
 164 int usercount_i(chanrec *c);
 165 char* Passwd(userrec *user);
 166 bool IsDenied(userrec *user);
 167 void AddWhoWas(userrec* u);
 168
 169 std::stringstream config_f(stringstream::in | stringstream::out);
 170
 171 std::vector<userrec*> all_opers;
 172
 173 char lowermap[255];
 174
 175 void AddOper(userrec* user)
 176 {
 177         log(DEBUG,"Oper added to optimization list");
 178         all_opers.push_back(user);
 179 }
 180
 181 void AddServerName(std::string servername)
 182 {
 183         log(DEBUG,"Adding server name: %s",servername.c_str());
 184         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 185         {
 186                 if (*a == servername)
 187                         return;
 188         }
 189         servernames.push_back(servername);
 190 }
 191
 192 const char* FindServerNamePtr(std::string servername)
 193 {
 194         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 195         {
 196                 if (*a == servername)
 197                         return a->c_str();
 198         }
 199         AddServerName(servername);
 200         return FindServerNamePtr(servername);
 201 }
 202
 203 void DeleteOper(userrec* user)
 204 {
 205         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 206         {
 207                 if (*a == user)
 208                 {
 209                         log(DEBUG,"Oper removed from optimization list");
 210                         all_opers.erase(a);
 211                         return;
 212                 }
 213         }
 214 }
 215
 216 std::string GetRevision()
 217 {
 218         /* w00t got me to replace a bunch of strtok_r
 219          * with something nicer, so i did this. Its the
 220          * same thing really, only in C++. It places the
 221          * text into a std::stringstream which is a readable
 222          * and writeable buffer stream, and then pops two
 223          * words off it, space delimited. Because it reads
 224          * into the same variable twice, the first word
 225          * is discarded, and the second one returned.
 226          */
 227         std::stringstream Revision("$Revision$");
 228         std::string single;
 229         Revision >> single >> single;
 230         return single;
 231 }
 232
 233
 234 std::string getservername()
 235 {
 236         return ServerName;
 237 }
 238
 239 std::string getserverdesc()
 240 {
 241         return ServerDesc;
 242 }
 243
 244 std::string getnetworkname()
 245 {
 246         return Network;
 247 }
 248
 249 std::string getadminname()
 250 {
 251         return AdminName;
 252 }
 253
 254 std::string getadminemail()
 255 {
 256         return AdminEmail;
 257 }
 258
 259 std::string getadminnick()
 260 {
 261         return AdminNick;
 262 }
 263
 264 void ReadConfig(bool bail, userrec* user)
 265 {
 266         char dbg[MAXBUF],pauseval[MAXBUF],Value[MAXBUF],timeout[MAXBUF],NB[MAXBUF],flood[MAXBUF],MW[MAXBUF],MCON[MAXBUF];
 267         char AH[MAXBUF],AP[MAXBUF],AF[MAXBUF],DNT[MAXBUF],pfreq[MAXBUF],thold[MAXBUF],sqmax[MAXBUF],rqmax[MAXBUF],SLIMT[MAXBUF];
 268         ConnectClass c;
 269         std::stringstream errstr;
 270         include_stack.clear();
 271
 272         if (!LoadConf(CONFIG_FILE,&config_f,&errstr))
 273         {
 274                 errstr.seekg(0);
 275                 log(DEFAULT,"There were errors in your configuration:\n%s",errstr.str().c_str());
 276                 if (bail)
 277                 {
 278                         printf("There were errors in your configuration:\n%s",errstr.str().c_str());
 279                         Exit(0);
 280                 }
 281                 else
 282                 {
 283                         char dataline[1024];
 284                         if (user)
 285                         {
 286                                 WriteServ(user->fd,"NOTICE %s :There were errors in the configuration file:",user->nick);
 287                                 while (!errstr.eof())
 288                                 {
 289                                         errstr.getline(dataline,1024);
 290                                         WriteServ(user->fd,"NOTICE %s :%s",user->nick,dataline);
 291                                 }
 292                         }
 293                         else
 294                         {
 295                                 WriteOpers("There were errors in the configuration file:");
 296                                 while (!errstr.eof())
 297                                 {
 298                                         errstr.getline(dataline,1024);
 299                                         WriteOpers(dataline);
 300                                 }
 301                         }
 302                         return;
 303                 }
 304         }
 305
 306         ConfValue("server","name",0,ServerName,&config_f);
 307         ConfValue("server","description",0,ServerDesc,&config_f);
 308         ConfValue("server","network",0,Network,&config_f);
 309         ConfValue("admin","name",0,AdminName,&config_f);
 310         ConfValue("admin","email",0,AdminEmail,&config_f);
 311         ConfValue("admin","nick",0,AdminNick,&config_f);
 312         ConfValue("files","motd",0,motd,&config_f);
 313         ConfValue("files","rules",0,rules,&config_f);
 314         ConfValue("power","diepass",0,diepass,&config_f);
 315         ConfValue("power","pause",0,pauseval,&config_f);
 316         ConfValue("power","restartpass",0,restartpass,&config_f);
 317         ConfValue("options","prefixquit",0,PrefixQuit,&config_f);
 318         ConfValue("die","value",0,DieValue,&config_f);
 319         ConfValue("options","loglevel",0,dbg,&config_f);
 320         ConfValue("options","netbuffersize",0,NB,&config_f);
 321         ConfValue("options","maxwho",0,MW,&config_f);
 322         ConfValue("options","allowhalfop",0,AH,&config_f);
 323         ConfValue("options","allowprotect",0,AP,&config_f);
 324         ConfValue("options","allowfounder",0,AF,&config_f);
 325         ConfValue("dns","server",0,DNSServer,&config_f);
 326         ConfValue("dns","timeout",0,DNT,&config_f);
 327         ConfValue("options","moduledir",0,ModPath,&config_f);
 328         ConfValue("disabled","commands",0,DisabledCommands,&config_f);
 329         ConfValue("options","somaxconn",0,MCON,&config_f);
 330         ConfValue("options","softlimit",0,SLIMT,&config_f);
 331
 332         SoftLimit = atoi(SLIMT);
 333         if ((SoftLimit < 1) || (SoftLimit > MAXCLIENTS))
 334         {
 335                 log(DEFAULT,"WARNING: <options:softlimit> value is greater than %d or less than 0, set to %d.",MAXCLIENTS,MAXCLIENTS);
 336                 SoftLimit = MAXCLIENTS;
 337         }
 338         MaxConn = atoi(MCON);
 339         if (MaxConn > SOMAXCONN)
 340                 log(DEFAULT,"WARNING: <options:somaxconn> value may be higher than the system-defined SOMAXCONN value!");
 341         NetBufferSize = atoi(NB);
 342         MaxWhoResults = atoi(MW);
 343         dns_timeout = atoi(DNT);
 344         if (!dns_timeout)
 345                 dns_timeout = 5;
 346         if (!MaxConn)
 347                 MaxConn = SOMAXCONN;
 348         if (!DNSServer[0])
 349                 strlcpy(DNSServer,"127.0.0.1",MAXBUF);
 350         if (!ModPath[0])
 351                 strlcpy(ModPath,MOD_PATH,MAXBUF);
 352         AllowHalfop = ((!strcasecmp(AH,"true")) || (!strcasecmp(AH,"1")) || (!strcasecmp(AH,"yes")));
 353         AllowProtect = ((!strcasecmp(AP,"true")) || (!strcasecmp(AP,"1")) || (!strcasecmp(AP,"yes")));
 354         AllowFounder = ((!strcasecmp(AF,"true")) || (!strcasecmp(AF,"1")) || (!strcasecmp(AF,"yes")));
 355         if ((!NetBufferSize) || (NetBufferSize > 65535) || (NetBufferSize < 1024))
 356         {
 357                 log(DEFAULT,"No NetBufferSize specified or size out of range, setting to default of 10240.");
 358                 NetBufferSize = 10240;
 359         }
 360         if ((!MaxWhoResults) || (MaxWhoResults > 65535) || (MaxWhoResults < 1))
 361         {
 362                 log(DEFAULT,"No MaxWhoResults specified or size out of range, setting to default of 128.");
 363                 MaxWhoResults = 128;
 364         }
 365         if (!strcmp(dbg,"debug"))
 366                 LogLevel = DEBUG;
 367         if (!strcmp(dbg,"verbose"))
 368                 LogLevel = VERBOSE;
 369         if (!strcmp(dbg,"default"))
 370                 LogLevel = DEFAULT;
 371         if (!strcmp(dbg,"sparse"))
 372                 LogLevel = SPARSE;
 373         if (!strcmp(dbg,"none"))
 374                 LogLevel = NONE;
 375         readfile(MOTD,motd);
 376         log(DEFAULT,"Reading message of the day...");
 377         readfile(RULES,rules);
 378         log(DEFAULT,"Reading connect classes...");
 379         Classes.clear();
 380         for (int i = 0; i < ConfValueEnum("connect",&config_f); i++)
 381         {
 382                 strcpy(Value,"");
 383                 ConfValue("connect","allow",i,Value,&config_f);
 384                 ConfValue("connect","timeout",i,timeout,&config_f);
 385                 ConfValue("connect","flood",i,flood,&config_f);
 386                 ConfValue("connect","pingfreq",i,pfreq,&config_f);
 387                 ConfValue("connect","threshold",i,thold,&config_f);
 388                 ConfValue("connect","sendq",i,sqmax,&config_f);
 389                 ConfValue("connect","recvq",i,rqmax,&config_f);
 390                 if (Value[0])
 391                 {
 392                         strlcpy(c.host,Value,MAXBUF);
 393                         c.type = CC_ALLOW;
 394                         strlcpy(Value,"",MAXBUF);
 395                         ConfValue("connect","password",i,Value,&config_f);
 396                         strlcpy(c.pass,Value,MAXBUF);
 397                         c.registration_timeout = 90; // default is 2 minutes
 398                         c.pingtime = 120;
 399                         c.flood = atoi(flood);
 400                         c.threshold = 5;
 401                         c.sendqmax = 262144; // 256k
 402                         c.recvqmax = 4096;   // 4k
 403                         if (atoi(thold)>0)
 404                         {
 405                                 c.threshold = atoi(thold);
 406                         }
 407                         if (atoi(sqmax)>0)
 408                         {
 409                                 c.sendqmax = atoi(sqmax);
 410                         }
 411                         if (atoi(rqmax)>0)
 412                         {
 413                                 c.recvqmax = atoi(rqmax);
 414                         }
 415                         if (atoi(timeout)>0)
 416                         {
 417                                 c.registration_timeout = atoi(timeout);
 418                         }
 419                         if (atoi(pfreq)>0)
 420                         {
 421                                 c.pingtime = atoi(pfreq);
 422                         }
 423                         Classes.push_back(c);
 424                         log(DEBUG,"Read connect class type ALLOW, host=%s password=%s timeout=%lu flood=%lu",c.host,c.pass,(unsigned long)c.registration_timeout,(unsigned long)c.flood);
 425                 }
 426                 else
 427                 {
 428                         ConfValue("connect","deny",i,Value,&config_f);
 429                         strlcpy(c.host,Value,MAXBUF);
 430                         c.type = CC_DENY;
 431                         Classes.push_back(c);
 432                         log(DEBUG,"Read connect class type DENY, host=%s",c.host);
 433                 }
 434
 435         }
 436         log(DEFAULT,"Reading K lines,Q lines and Z lines from config...");
 437         read_xline_defaults();
 438         log(DEFAULT,"Applying K lines, Q lines and Z lines...");
 439         apply_lines();
 440
 441         autoconns.clear();
 442         for (int i = 0; i < ConfValueEnum("link",&config_f); i++)
 443         {
 444                 char Link_ServerName[MAXBUF],Link_AConn[MAXBUF];
 445                 ConfValue("link","name",i,Link_ServerName,&config_f);
 446                 ConfValue("link","autoconnect",i,Link_AConn,&config_f);
 447                 if (strcmp(Link_AConn,""))
 448                 {
 449                         autoconns[std::string(Link_ServerName)] = atoi(Link_AConn) + time(NULL);
 450                 }
 451         }
 452
 453
 454         log(DEFAULT,"Done reading configuration file, InspIRCd is now starting.");
 455         if (!bail)
 456         {
 457                 log(DEFAULT,"Adding and removing modules due to rehash...");
 458
 459                 std::vector<std::string> old_module_names, new_module_names, added_modules, removed_modules;
 460
 461                 // store the old module names
 462                 for (std::vector<std::string>::iterator t = module_names.begin(); t != module_names.end(); t++)
 463                 {
 464                         old_module_names.push_back(*t);
 465                 }
 466
 467                 // get the new module names
 468                 for (int count2 = 0; count2 < ConfValueEnum("module",&config_f); count2++)
 469                 {
 470                         ConfValue("module","name",count2,Value,&config_f);
 471                         new_module_names.push_back(Value);
 472                 }
 473
 474                 // now create a list of new modules that are due to be loaded
 475                 // and a seperate list of modules which are due to be unloaded
 476                 for (std::vector<std::string>::iterator _new = new_module_names.begin(); _new != new_module_names.end(); _new++)
 477                 {
 478                         bool added = true;
 479                         for (std::vector<std::string>::iterator old = old_module_names.begin(); old != old_module_names.end(); old++)
 480                         {
 481                                 if (*old == *_new)
 482                                         added = false;
 483                         }
 484                         if (added)
 485                                 added_modules.push_back(*_new);
 486                 }
 487                 for (std::vector<std::string>::iterator oldm = old_module_names.begin(); oldm != old_module_names.end(); oldm++)
 488                 {
 489                         bool removed = true;
 490                         for (std::vector<std::string>::iterator newm = new_module_names.begin(); newm != new_module_names.end(); newm++)
 491                         {
 492                                 if (*newm == *oldm)
 493                                         removed = false;
 494                         }
 495                         if (removed)
 496                                 removed_modules.push_back(*oldm);
 497                 }
 498                 // now we have added_modules, a vector of modules to be loaded, and removed_modules, a vector of modules
 499                 // to be removed.
 500                 int rem = 0, add = 0;
 501                 if (!removed_modules.empty())
 502                 for (std::vector<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 503                 {
 504                         if (UnloadModule(removing->c_str()))
 505                         {
 506                                 WriteOpers("*** REHASH UNLOADED MODULE: %s",removing->c_str());
 507                                 WriteServ(user->fd,"973 %s %s :Module %s successfully unloaded.",user->nick, removing->c_str(), removing->c_str());
 508                                 rem++;
 509                         }
 510                         else
 511                         {
 512                                 WriteServ(user->fd,"972 %s %s :Failed to unload module %s: %s",user->nick, removing->c_str(), removing->c_str(), ModuleError());
 513                         }
 514                 }
 515                 if (!added_modules.empty())
 516                 for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 517                 {
 518                         if (LoadModule(adding->c_str()))
 519                         {
 520                                 WriteOpers("*** REHASH LOADED MODULE: %s",adding->c_str());
 521                                 WriteServ(user->fd,"975 %s %s :Module %s successfully loaded.",user->nick, adding->c_str(), adding->c_str());
 522                                 add++;
 523                         }
 524                         else
 525                         {
 526                                 WriteServ(user->fd,"974 %s %s :Failed to load module %s: %s",user->nick, adding->c_str(), adding->c_str(), ModuleError());
 527                         }
 528                 }
 529                 log(DEFAULT,"Successfully unloaded %lu of %lu modules and loaded %lu of %lu modules.",(unsigned long)rem,(unsigned long)removed_modules.size(),(unsigned long)add,(unsigned long)added_modules.size());
 530         }
 531 }
 532
 533
 534 /* add a channel to a user, creating the record for it if needed and linking
 535  * it to the user record */
 536
 537 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 538 {
 539         if ((!user) || (!cn))
 540         {
 541                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 542                 return 0;
 543         }
 544
 545         chanrec* Ptr;
 546         int created = 0;
 547         char cname[MAXBUF];
 548
 549         strncpy(cname,cn,MAXBUF);
 550
 551         // we MUST declare this wherever we use FOREACH_RESULT
 552         int MOD_RESULT = 0;
 553
 554         if (strlen(cname) > CHANMAX)
 555         {
 556                 cname[CHANMAX] = '\0';
 557         }
 558
 559         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 560
 561         if ((FindChan(cname)) && (has_channel(user,FindChan(cname))))
 562         {
 563                 return NULL; // already on the channel!
 564         }
 565
 566
 567         if (!FindChan(cname))
 568         {
 569                 if (!strcasecmp(ServerName,user->server))
 570                 {
 571                         MOD_RESULT = 0;
 572                         FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
 573                         if (MOD_RESULT == 1) {
 574                                 return NULL;
 575                         }
 576                 }
 577
 578                 /* create a new one */
 579                 log(DEBUG,"add_channel: creating: %s",cname);
 580                 {
 581                         chanlist[cname] = new chanrec();
 582
 583                         strlcpy(chanlist[cname]->name, cname,CHANMAX);
 584                         chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 585                         chanlist[cname]->created = TIME;
 586                         strcpy(chanlist[cname]->topic, "");
 587                         strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
 588                         chanlist[cname]->topicset = 0;
 589                         Ptr = chanlist[cname];
 590                         log(DEBUG,"add_channel: created: %s",cname);
 591                         /* set created to 2 to indicate user
 592                          * is the first in the channel
 593                          * and should be given ops */
 594                         created = 2;
 595                 }
 596         }
 597         else
 598         {
 599                 /* channel exists, just fish out a pointer to its struct */
 600                 Ptr = FindChan(cname);
 601                 if (Ptr)
 602                 {
 603                         log(DEBUG,"add_channel: joining to: %s",Ptr->name);
 604
 605                         // remote users are allowed us to bypass channel modes
 606                         // and bans (used by servers)
 607                         if (!strcasecmp(ServerName,user->server))
 608                         {
 609                                 log(DEBUG,"Not overriding...");
 610                                 MOD_RESULT = 0;
 611                                 FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
 612                                 if (MOD_RESULT == 1) {
 613                                         return NULL;
 614                                 }
 615                                 log(DEBUG,"MOD_RESULT=%d",MOD_RESULT);
 616
 617                                 if (!MOD_RESULT)
 618                                 {
 619                                         log(DEBUG,"add_channel: checking key, invite, etc");
 620                                         MOD_RESULT = 0;
 621                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
 622                                         if (MOD_RESULT == 0)
 623                                         {
 624                                                 if (Ptr->key[0])
 625                                                 {
 626                                                         log(DEBUG,"add_channel: %s has key %s",Ptr->name,Ptr->key);
 627                                                         if (!key)
 628                                                         {
 629                                                                 log(DEBUG,"add_channel: no key given in JOIN");
 630                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 631                                                                 return NULL;
 632                                                         }
 633                                                         else
 634                                                         {
 635                                                                 if (strcasecmp(key,Ptr->key))
 636                                                                 {
 637                                                                         log(DEBUG,"add_channel: bad key given in JOIN");
 638                                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 639                                                                         return NULL;
 640                                                                 }
 641                                                         }
 642                                                 }
 643                                                 log(DEBUG,"add_channel: no key");
 644                                         }
 645                                         MOD_RESULT = 0;
 646                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 647                                         if (MOD_RESULT == 0)
 648                                         {
 649                                                 if (Ptr->binarymodes & CM_INVITEONLY)
 650                                                 {
 651                                                         log(DEBUG,"add_channel: channel is +i");
 652                                                         if (user->IsInvited(Ptr->name))
 653                                                         {
 654                                                                 /* user was invited to channel */
 655                                                                 /* there may be an optional channel NOTICE here */
 656                                                         }
 657                                                         else
 658                                                         {
 659                                                                 WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 660                                                                 return NULL;
 661                                                         }
 662                                                 }
 663                                                 log(DEBUG,"add_channel: channel is not +i");
 664                                         }
 665                                         MOD_RESULT = 0;
 666                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 667                                         if (MOD_RESULT == 0)
 668                                         {
 669                                                 if (Ptr->limit)
 670                                                 {
 671                                                         if (usercount(Ptr) >= Ptr->limit)
 672                                                         {
 673                                                                 WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 674                                                                 return NULL;
 675                                                         }
 676                                                 }
 677                                         }
 678                                         log(DEBUG,"add_channel: about to walk banlist");
 679                                         MOD_RESULT = 0;
 680                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 681                                         if (MOD_RESULT == 0)
 682                                         {
 683                                                 /* check user against the channel banlist */
 684                                                 if (Ptr)
 685                                                 {
 686                                                         if (Ptr->bans.size())
 687                                                         {
 688                                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 689                                                                 {
 690                                                                         if (match(user->GetFullHost(),i->data))
 691                                                                         {
 692                                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 693                                                                                 return NULL;
 694                                                                         }
 695                                                                 }
 696                                                         }
 697                                                 }
 698                                                 log(DEBUG,"add_channel: bans checked");
 699                                         }
 700
 701                                 }
 702
 703
 704                                 if ((Ptr) && (user))
 705                                 {
 706                                         user->RemoveInvite(Ptr->name);
 707                                 }
 708
 709                                 log(DEBUG,"add_channel: invites removed");
 710
 711                         }
 712                         else
 713                         {
 714                                 log(DEBUG,"Overridden checks");
 715                         }
 716
 717
 718                 }
 719                 created = 1;
 720         }
 721
 722         log(DEBUG,"Passed channel checks");
 723
 724         for (unsigned int index =0; index < user->chans.size(); index++)
 725         {
 726                 if (user->chans[index].channel == NULL)
 727                 {
 728                         return ForceChan(Ptr,user->chans[index],user,created);
 729                 }
 730         }
 731         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 732          * and put the channel in here. Same for remote users which are not bound by
 733          * the channel limits. Otherwise, nope, youre boned.
 734          */
 735         if (strcasecmp(user->server,ServerName))
 736         {
 737                 ucrec a;
 738                 chanrec* c = ForceChan(Ptr,a,user,created);
 739                 user->chans.push_back(a);
 740                 return c;
 741         }
 742         else if (strchr(user->modes,'o'))
 743         {
 744                 /* Oper allows extension up to the OPERMAXCHANS value */
 745                 if (user->chans.size() < OPERMAXCHANS)
 746                 {
 747                         ucrec a;
 748                         chanrec* c = ForceChan(Ptr,a,user,created);
 749                         user->chans.push_back(a);
 750                         return c;
 751                 }
 752         }
 753         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 754         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 755         return NULL;
 756 }
 757
 758 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 759 {
 760         if (created == 2)
 761         {
 762                 /* first user in is given ops */
 763                 a.uc_modes = UCMODE_OP;
 764         }
 765         else
 766         {
 767                 a.uc_modes = 0;
 768         }
 769         a.channel = Ptr;
 770         Ptr->AddUser((char*)user);
 771         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 772         log(DEBUG,"Sent JOIN to client");
 773         if (Ptr->topicset)
 774         {
 775                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 776                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 777         }
 778         userlist(user,Ptr);
 779         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 780         FOREACH_MOD OnUserJoin(user,Ptr);
 781         return Ptr;
 782 }
 783
 784 /* remove a channel from a users record, and remove the record from memory
 785  * if the channel has become empty */
 786
 787 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 788 {
 789         if ((!user) || (!cname))
 790         {
 791                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 792                 return NULL;
 793         }
 794
 795         chanrec* Ptr;
 796
 797         if ((!cname) || (!user))
 798         {
 799                 return NULL;
 800         }
 801
 802         Ptr = FindChan(cname);
 803
 804         if (!Ptr)
 805         {
 806                 return NULL;
 807         }
 808
 809         FOREACH_MOD OnUserPart(user,Ptr);
 810         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 811
 812         for (unsigned int i =0; i < user->chans.size(); i++)
 813         {
 814                 /* zap it from the channel list of the user */
 815                 if (user->chans[i].channel == Ptr)
 816                 {
 817                         if (reason)
 818                         {
 819                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 820                         }
 821                         else
 822                         {
 823                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 824                         }
 825                         user->chans[i].uc_modes = 0;
 826                         user->chans[i].channel = NULL;
 827                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 828                         break;
 829                 }
 830         }
 831
 832         Ptr->DelUser((char*)user);
 833
 834         /* if there are no users left on the channel */
 835         if (!usercount(Ptr))
 836         {
 837                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 838
 839                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 840
 841                 /* kill the record */
 842                 if (iter != chanlist.end())
 843                 {
 844                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 845                         delete Ptr;
 846                         chanlist.erase(iter);
 847                 }
 848         }
 849
 850         return NULL;
 851 }
 852
 853
 854 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 855 {
 856         if ((!src) || (!user) || (!Ptr) || (!reason))
 857         {
 858                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 859                 return;
 860         }
 861
 862         if ((!Ptr) || (!user) || (!src))
 863         {
 864                 return;
 865         }
 866
 867         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 868
 869         if (!has_channel(user,Ptr))
 870         {
 871                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 872                 return;
 873         }
 874
 875         int MOD_RESULT = 0;
 876         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 877         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 878                 return;
 879
 880         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 881         {
 882                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 883                 {
 884                         if (cstatus(src,Ptr) == STATUS_HOP)
 885                         {
 886                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 887                         }
 888                         else
 889                         {
 890                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 891                         }
 892
 893                         return;
 894                 }
 895         }
 896
 897         if (!is_uline(src->server))
 898         {
 899                 MOD_RESULT = 0;
 900                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 901                 if (MOD_RESULT)
 902                         return;
 903         }
 904
 905         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 906
 907         for (unsigned int i =0; i < user->chans.size(); i++)
 908         {
 909                 /* zap it from the channel list of the user */
 910                 if (user->chans[i].channel)
 911                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 912                 {
 913                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 914                         user->chans[i].uc_modes = 0;
 915                         user->chans[i].channel = NULL;
 916                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 917                         break;
 918                 }
 919         }
 920
 921         Ptr->DelUser((char*)user);
 922
 923         /* if there are no users left on the channel */
 924         if (!usercount(Ptr))
 925         {
 926                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 927
 928                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 929
 930                 /* kill the record */
 931                 if (iter != chanlist.end())
 932                 {
 933                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 934                         delete Ptr;
 935                         chanlist.erase(iter);
 936                 }
 937         }
 938 }
 939
 940
 941
 942
 943 /* This function pokes and hacks at a parameter list like the following:
 944  *
 945  * PART #winbot,#darkgalaxy :m00!
 946  *
 947  * to turn it into a series of individual calls like this:
 948  *
 949  * PART #winbot :m00!
 950  * PART #darkgalaxy :m00!
 951  *
 952  * The seperate calls are sent to a callback function provided by the caller
 953  * (the caller will usually call itself recursively). The callback function
 954  * must be a command handler. Calling this function on a line with no list causes
 955  * no action to be taken. You must provide a starting and ending parameter number
 956  * where the range of the list can be found, useful if you have a terminating
 957  * parameter as above which is actually not part of the list, or parameters
 958  * before the actual list as well. This code is used by many functions which
 959  * can function as "one to list" (see the RFC) */
 960
 961 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 962 {
 963         char plist[MAXBUF];
 964         char *param;
 965         char *pars[32];
 966         char blog[32][MAXBUF];
 967         char blog2[32][MAXBUF];
 968         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 969         char keystr[MAXBUF];
 970         char moo[MAXBUF];
 971
 972         for (int i = 0; i <32; i++)
 973                 strcpy(blog[i],"");
 974
 975         for (int i = 0; i <32; i++)
 976                 strcpy(blog2[i],"");
 977
 978         strcpy(moo,"");
 979         for (int i = 0; i <10; i++)
 980         {
 981                 if (!parameters[i])
 982                 {
 983                         parameters[i] = moo;
 984                 }
 985         }
 986         if (joins)
 987         {
 988                 if (pcnt > 1) /* we have a key to copy */
 989                 {
 990                         strlcpy(keystr,parameters[1],MAXBUF);
 991                 }
 992         }
 993
 994         if (!parameters[start])
 995         {
 996                 return 0;
 997         }
 998         if (!strchr(parameters[start],','))
 999         {
1000                 return 0;
1001         }
1002         strcpy(plist,"");
1003         for (int i = start; i <= end; i++)
1004         {
1005                 if (parameters[i])
1006                 {
1007                         strlcat(plist,parameters[i],MAXBUF);
1008                 }
1009         }
1010
1011         j = 0;
1012         param = plist;
1013
1014         t = strlen(plist);
1015         for (int i = 0; i < t; i++)
1016         {
1017                 if (plist[i] == ',')
1018                 {
1019                         plist[i] = '\0';
1020                         strlcpy(blog[j++],param,MAXBUF);
1021                         param = plist+i+1;
1022                         if (j>20)
1023                         {
1024                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
1025                                 return 1;
1026                         }
1027                 }
1028         }
1029         strlcpy(blog[j++],param,MAXBUF);
1030         total = j;
1031
1032         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
1033         {
1034                 strcat(keystr,",");
1035         }
1036
1037         if ((joins) && (keystr))
1038         {
1039                 if (strchr(keystr,','))
1040                 {
1041                         j = 0;
1042                         param = keystr;
1043                         t2 = strlen(keystr);
1044                         for (int i = 0; i < t2; i++)
1045                         {
1046                                 if (keystr[i] == ',')
1047                                 {
1048                                         keystr[i] = '\0';
1049                                         strlcpy(blog2[j++],param,MAXBUF);
1050                                         param = keystr+i+1;
1051                                 }
1052                         }
1053                         strlcpy(blog2[j++],param,MAXBUF);
1054                         total2 = j;
1055                 }
1056         }
1057
1058         for (j = 0; j < total; j++)
1059         {
1060                 if (blog[j])
1061                 {
1062                         pars[0] = blog[j];
1063                 }
1064                 for (q = end; q < pcnt-1; q++)
1065                 {
1066                         if (parameters[q+1])
1067                         {
1068                                 pars[q-end+1] = parameters[q+1];
1069                         }
1070                 }
1071                 if ((joins) && (parameters[1]))
1072                 {
1073                         if (pcnt > 1)
1074                         {
1075                                 pars[1] = blog2[j];
1076                         }
1077                         else
1078                         {
1079                                 pars[1] = NULL;
1080                         }
1081                 }
1082                 /* repeatedly call the function with the hacked parameter list */
1083                 if ((joins) && (pcnt > 1))
1084                 {
1085                         if (pars[1])
1086                         {
1087                                 // pars[1] already set up and containing key from blog2[j]
1088                                 fn(pars,2,u);
1089                         }
1090                         else
1091                         {
1092                                 pars[1] = parameters[1];
1093                                 fn(pars,2,u);
1094                         }
1095                 }
1096                 else
1097                 {
1098                         fn(pars,pcnt-(end-start),u);
1099                 }
1100         }
1101
1102         return 1;
1103 }
1104
1105
1106
1107 void kill_link(userrec *user,const char* r)
1108 {
1109         user_hash::iterator iter = clientlist.find(user->nick);
1110
1111         char reason[MAXBUF];
1112
1113         strncpy(reason,r,MAXBUF);
1114
1115         if (strlen(reason)>MAXQUIT)
1116         {
1117                 reason[MAXQUIT-1] = '\0';
1118         }
1119
1120         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1121         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1122         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1123
1124         if (user->registered == 7) {
1125                 FOREACH_MOD OnUserQuit(user,reason);
1126                 WriteCommonExcept(user,"QUIT :%s",reason);
1127         }
1128
1129         user->FlushWriteBuf();
1130
1131         FOREACH_MOD OnUserDisconnect(user);
1132
1133         if (user->fd > -1)
1134         {
1135                 FOREACH_MOD OnRawSocketClose(user->fd);
1136                 SE->DelFd(user->fd);
1137                 user->CloseSocket();
1138         }
1139
1140         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
1141         // if they were an oper with +s.
1142         if (user->registered == 7) {
1143                 purge_empty_chans(user);
1144                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
1145                 if (!strcmp(user->server,ServerName))
1146                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
1147                 AddWhoWas(user);
1148         }
1149
1150         if (iter != clientlist.end())
1151         {
1152                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1153                 if (user->fd > -1)
1154                         fd_ref_table[user->fd] = NULL;
1155                 clientlist.erase(iter);
1156         }
1157         delete user;
1158 }
1159
1160 void kill_link_silent(userrec *user,const char* r)
1161 {
1162         user_hash::iterator iter = clientlist.find(user->nick);
1163
1164         char reason[MAXBUF];
1165
1166         strncpy(reason,r,MAXBUF);
1167
1168         if (strlen(reason)>MAXQUIT)
1169         {
1170                 reason[MAXQUIT-1] = '\0';
1171         }
1172
1173         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1174         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1175         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1176
1177         user->FlushWriteBuf();
1178
1179         if (user->registered == 7) {
1180                 FOREACH_MOD OnUserQuit(user,reason);
1181                 WriteCommonExcept(user,"QUIT :%s",reason);
1182         }
1183
1184         FOREACH_MOD OnUserDisconnect(user);
1185
1186         if (user->fd > -1)
1187         {
1188                 FOREACH_MOD OnRawSocketClose(user->fd);
1189                 SE->DelFd(user->fd);
1190                 user->CloseSocket();
1191         }
1192
1193         if (user->registered == 7) {
1194                 purge_empty_chans(user);
1195         }
1196
1197         if (iter != clientlist.end())
1198         {
1199                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1200                 if (user->fd > -1)
1201                         fd_ref_table[user->fd] = NULL;
1202                 clientlist.erase(iter);
1203         }
1204         delete user;
1205 }
1206
1207
1208 int main(int argc, char** argv)
1209 {
1210         Start();
1211         srand(time(NULL));
1212         log(DEBUG,"*** InspIRCd starting up!");
1213         if (!FileExists(CONFIG_FILE))
1214         {
1215                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
1216                 log(DEFAULT,"main: no config");
1217                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
1218                 Exit(ERROR);
1219         }
1220         if (argc > 1) {
1221                 for (int i = 1; i < argc; i++)
1222                 {
1223                         if (!strcmp(argv[i],"-nofork")) {
1224                                 nofork = true;
1225                         }
1226                         if (!strcmp(argv[i],"-wait")) {
1227                                 sleep(6);
1228                         }
1229                         if (!strcmp(argv[i],"-nolimit")) {
1230                                 unlimitcore = true;
1231                         }
1232                 }
1233         }
1234
1235         strlcpy(MyExecutable,argv[0],MAXBUF);
1236
1237         // initialize the lowercase mapping table
1238         for (unsigned int cn = 0; cn < 256; cn++)
1239                 lowermap[cn] = cn;
1240         // lowercase the uppercase chars
1241         for (unsigned int cn = 65; cn < 91; cn++)
1242                 lowermap[cn] = tolower(cn);
1243         // now replace the specific chars for scandanavian comparison
1244         lowermap[(unsigned)'['] = '{';
1245         lowermap[(unsigned)']'] = '}';
1246         lowermap[(unsigned)'\\'] = '|';
1247
1248         if (InspIRCd(argv,argc) == ERROR)
1249         {
1250                 log(DEFAULT,"main: daemon function bailed");
1251                 printf("ERROR: could not initialise. Shutting down.\n");
1252                 Exit(ERROR);
1253         }
1254         Exit(TRUE);
1255         return 0;
1256 }
1257
1258 template<typename T> inline string ConvToStr(const T &in)
1259 {
1260         stringstream tmp;
1261         if (!(tmp << in)) return string();
1262         return tmp.str();
1263 }
1264
1265 /* re-allocates a nick in the user_hash after they change nicknames,
1266  * returns a pointer to the new user as it may have moved */
1267
1268 userrec* ReHashNick(char* Old, char* New)
1269 {
1270         //user_hash::iterator newnick;
1271         user_hash::iterator oldnick = clientlist.find(Old);
1272
1273         log(DEBUG,"ReHashNick: %s %s",Old,New);
1274
1275         if (!strcasecmp(Old,New))
1276         {
1277                 log(DEBUG,"old nick is new nick, skipping");
1278                 return oldnick->second;
1279         }
1280
1281         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
1282
1283         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1284
1285         userrec* olduser = oldnick->second;
1286         clientlist[New] = olduser;
1287         clientlist.erase(oldnick);
1288
1289         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1290
1291         return clientlist[New];
1292 }
1293
1294 /* adds or updates an entry in the whowas list */
1295 void AddWhoWas(userrec* u)
1296 {
1297         whowas_hash::iterator iter = whowas.find(u->nick);
1298         WhoWasUser *a = new WhoWasUser();
1299         strlcpy(a->nick,u->nick,NICKMAX);
1300         strlcpy(a->ident,u->ident,IDENTMAX);
1301         strlcpy(a->dhost,u->dhost,160);
1302         strlcpy(a->host,u->host,160);
1303         strlcpy(a->fullname,u->fullname,MAXGECOS);
1304         strlcpy(a->server,u->server,256);
1305         a->signon = u->signon;
1306
1307         /* MAX_WHOWAS:   max number of /WHOWAS items
1308          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
1309          *               can be replaced by a newer one
1310          */
1311
1312         if (iter == whowas.end())
1313         {
1314                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
1315                 {
1316                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
1317                         {
1318                                 // 3600 seconds in an hour ;)
1319                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
1320                                 {
1321                                         // delete the old one
1322                                         if (i->second) delete i->second;
1323                                         // replace with new one
1324                                         i->second = a;
1325                                         log(DEBUG,"added WHOWAS entry, purged an old record");
1326                                         return;
1327                                 }
1328                         }
1329                         // no space left and user doesnt exist. Don't leave ram in use!
1330                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
1331                         delete a;
1332                 }
1333                 else
1334                 {
1335                         log(DEBUG,"added fresh WHOWAS entry");
1336                         whowas[a->nick] = a;
1337                 }
1338         }
1339         else
1340         {
1341                 log(DEBUG,"updated WHOWAS entry");
1342                 if (iter->second) delete iter->second;
1343                 iter->second = a;
1344         }
1345 }
1346
1347 #ifdef THREADED_DNS
1348 void* dns_task(void* arg)
1349 {
1350         userrec* u = (userrec*)arg;
1351         log(DEBUG,"DNS thread for user %s",u->nick);
1352         DNS dns1;
1353         DNS dns2;
1354         std::string host;
1355         std::string ip;
1356         if (dns1.ReverseLookup(u->ip))
1357         {
1358                 log(DEBUG,"DNS Step 1");
1359                 while (!dns1.HasResult())
1360                 {
1361                         usleep(100);
1362                 }
1363                 host = dns1.GetResult();
1364                 if (host != "")
1365                 {
1366                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
1367                         if (dns2.ForwardLookup(host))
1368                         {
1369                                 while (!dns2.HasResult())
1370                                 {
1371                                         usleep(100);
1372                                 }
1373                                 ip = dns2.GetResultIP();
1374                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
1375                                 if (ip == std::string(u->ip))
1376                                 {
1377                                         log(DEBUG,"DNS Step 4");
1378                                         if (host.length() < 160)
1379                                         {
1380                                                 log(DEBUG,"DNS Step 5");
1381                                                 strcpy(u->host,host.c_str());
1382                                                 strcpy(u->dhost,host.c_str());
1383                                         }
1384                                 }
1385                         }
1386                 }
1387         }
1388         u->dns_done = true;
1389         return NULL;
1390 }
1391 #endif
1392
1393 /* add a client connection to the sockets list */
1394 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
1395 {
1396         string tempnick;
1397         char tn2[MAXBUF];
1398         user_hash::iterator iter;
1399
1400         tempnick = ConvToStr(socket) + "-unknown";
1401         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
1402
1403         iter = clientlist.find(tempnick);
1404
1405         // fix by brain.
1406         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
1407         // using one as a registered connection. As theyre per fd, we can also safely assume
1408         // that we wont have collisions. Therefore, if the nick exists in the list, its only
1409         // used by a dead socket, erase the iterator so that the new client may reclaim it.
1410         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
1411         // issue in earlier alphas/betas
1412         if (iter != clientlist.end())
1413         {
1414                 userrec* goner = iter->second;
1415                 delete goner;
1416                 clientlist.erase(iter);
1417         }
1418
1419         /*
1420          * It is OK to access the value here this way since we know
1421          * it exists, we just created it above.
1422          *
1423          * At NO other time should you access a value in a map or a
1424          * hash_map this way.
1425          */
1426         clientlist[tempnick] = new userrec();
1427
1428         NonBlocking(socket);
1429         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
1430
1431         clientlist[tempnick]->fd = socket;
1432         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
1433         strlcpy(clientlist[tempnick]->host, host,160);
1434         strlcpy(clientlist[tempnick]->dhost, host,160);
1435         clientlist[tempnick]->server = (char*)FindServerNamePtr(ServerName);
1436         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
1437         clientlist[tempnick]->registered = 0;
1438         clientlist[tempnick]->signon = TIME+dns_timeout;
1439         clientlist[tempnick]->lastping = 1;
1440         clientlist[tempnick]->port = port;
1441         strlcpy(clientlist[tempnick]->ip,ip,16);
1442
1443         // set the registration timeout for this user
1444         unsigned long class_regtimeout = 90;
1445         int class_flood = 0;
1446         long class_threshold = 5;
1447         long class_sqmax = 262144;      // 256kb
1448         long class_rqmax = 4096;        // 4k
1449
1450         for (ClassVector::iterator i = Classes.begin(); i != Classes.end(); i++)
1451         {
1452                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
1453                 {
1454                         class_regtimeout = (unsigned long)i->registration_timeout;
1455                         class_flood = i->flood;
1456                         clientlist[tempnick]->pingmax = i->pingtime;
1457                         class_threshold = i->threshold;
1458                         class_sqmax = i->sendqmax;
1459                         class_rqmax = i->recvqmax;
1460                         break;
1461                 }
1462         }
1463
1464         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax+dns_timeout;
1465         clientlist[tempnick]->timeout = TIME+class_regtimeout;
1466         clientlist[tempnick]->flood = class_flood;
1467         clientlist[tempnick]->threshold = class_threshold;
1468         clientlist[tempnick]->sendqmax = class_sqmax;
1469         clientlist[tempnick]->recvqmax = class_rqmax;
1470
1471         ucrec a;
1472         a.channel = NULL;
1473         a.uc_modes = 0;
1474         for (int i = 0; i < MAXCHANS; i++)
1475                 clientlist[tempnick]->chans.push_back(a);
1476
1477         if (clientlist.size() > SoftLimit)
1478         {
1479                 kill_link(clientlist[tempnick],"No more connections allowed");
1480                 return;
1481         }
1482
1483         if (clientlist.size() >= MAXCLIENTS)
1484         {
1485                 kill_link(clientlist[tempnick],"No more connections allowed");
1486                 return;
1487         }
1488
1489         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
1490         // its a pretty big but for the moment valid assumption:
1491         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
1492         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
1493         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
1494         // which for the time being is a physical impossibility (even the largest networks dont have more
1495         // than about 10,000 users on ONE server!)
1496         if ((unsigned)socket > 65534)
1497         {
1498                 kill_link(clientlist[tempnick],"Server is full");
1499                 return;
1500         }
1501
1502
1503         char* e = matches_exception(ip);
1504         if (!e)
1505         {
1506                 char* r = matches_zline(ip);
1507                 if (r)
1508                 {
1509                         char reason[MAXBUF];
1510                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
1511                         kill_link(clientlist[tempnick],reason);
1512                         return;
1513                 }
1514         }
1515         fd_ref_table[socket] = clientlist[tempnick];
1516         SE->AddFd(socket,true,X_ESTAB_CLIENT);
1517 }
1518
1519 /* shows the message of the day, and any other on-logon stuff */
1520 void FullConnectUser(userrec* user)
1521 {
1522         statsConnects++;
1523         user->idle_lastmsg = TIME;
1524         log(DEBUG,"ConnectUser: %s",user->nick);
1525
1526         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
1527         {
1528                 kill_link(user,"Invalid password");
1529                 return;
1530         }
1531         if (IsDenied(user))
1532         {
1533                 kill_link(user,"Unauthorised connection");
1534                 return;
1535         }
1536
1537         char match_against[MAXBUF];
1538         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
1539         char* e = matches_exception(match_against);
1540         if (!e)
1541         {
1542                 char* r = matches_gline(match_against);
1543                 if (r)
1544                 {
1545                         char reason[MAXBUF];
1546                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1547                         kill_link_silent(user,reason);
1548                         return;
1549                 }
1550                 r = matches_kline(user->host);
1551                 if (r)
1552                 {
1553                         char reason[MAXBUF];
1554                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1555                         kill_link_silent(user,reason);
1556                         return;
1557                 }
1558         }
1559
1560
1561         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Network);
1562         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Network,user->nick,user->ident,user->host);
1563         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,ServerName,VERSION);
1564         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
1565         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,ServerName,VERSION);
1566         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
1567         std::stringstream v;
1568         v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
1569         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
1570         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
1571         v << Network;
1572         std::string data005 = v.str();
1573         FOREACH_MOD On005Numeric(data005);
1574         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1575         // so i'd better split it :)
1576         std::stringstream out(data005);
1577         std::string token = "";
1578         std::string line5 = "";
1579         int token_counter = 0;
1580         while (!out.eof())
1581         {
1582                 out >> token;
1583                 line5 = line5 + token + " ";
1584                 token_counter++;
1585                 if ((token_counter >= 13) || (out.eof() == true))
1586                 {
1587                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1588                         line5 = "";
1589                         token_counter = 0;
1590                 }
1591         }
1592         ShowMOTD(user);
1593
1594         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
1595         // onto the network and produce 'fake direction'
1596         FOREACH_MOD OnUserConnect(user);
1597         FOREACH_MOD OnGlobalConnect(user);
1598         user->registered = 7;
1599         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
1600 }
1601
1602
1603 /* shows the message of the day, and any other on-logon stuff */
1604 void ConnectUser(userrec *user)
1605 {
1606         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
1607         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
1608         {
1609                 FullConnectUser(user);
1610         }
1611 }
1612
1613 std::string GetVersionString()
1614 {
1615         char Revision[] = "$Revision$";
1616         char versiondata[MAXBUF];
1617         char *s1 = Revision;
1618         char *savept;
1619         char *v2 = strtok_r(s1," ",&savept);
1620         s1 = savept;
1621         v2 = strtok_r(s1," ",&savept);
1622         s1 = savept;
1623 #ifdef THREADED_DNS
1624         char dnsengine[] = "multithread";
1625 #else
1626         char dnsengine[] = "singlethread";
1627 #endif
1628         snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,v2,ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
1629         return versiondata;
1630 }
1631
1632 void handle_version(char **parameters, int pcnt, userrec *user)
1633 {
1634         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
1635 }
1636
1637
1638 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
1639 {
1640         for (unsigned int i = 0; i < cmdlist.size(); i++)
1641         {
1642                 if (!strcasecmp(cmdlist[i].command,commandname))
1643                 {
1644                         if (cmdlist[i].handler_function)
1645                         {
1646                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
1647                                 {
1648                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1649                                         {
1650                                                 if (cmdlist[i].flags_needed)
1651                                                 {
1652                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
1653                                                         {
1654                                                                 return true;
1655                                                         }
1656                                                         else
1657                                                         {
1658                                                                 return false;
1659                                                         }
1660                                                 }
1661                                                 return true;
1662                                         }
1663                                 }
1664                         }
1665                 }
1666         }
1667         return false;
1668 }
1669
1670 // calls a handler function for a command
1671
1672 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
1673 {
1674         for (unsigned int i = 0; i < cmdlist.size(); i++)
1675         {
1676                 if (!strcasecmp(cmdlist[i].command,commandname))
1677                 {
1678                         if (cmdlist[i].handler_function)
1679                         {
1680                                 if (pcnt>=cmdlist[i].min_params)
1681                                 {
1682                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1683                                         {
1684                                                 if (cmdlist[i].flags_needed)
1685                                                 {
1686                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
1687                                                         {
1688                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
1689                                                         }
1690                                                 }
1691                                                 else
1692                                                 {
1693                                                         cmdlist[i].handler_function(parameters,pcnt,user);
1694                                                 }
1695                                         }
1696                                 }
1697                         }
1698                 }
1699         }
1700 }
1701
1702
1703 void force_nickchange(userrec* user,const char* newnick)
1704 {
1705         char nick[MAXBUF];
1706         int MOD_RESULT = 0;
1707
1708         strcpy(nick,"");
1709
1710         FOREACH_RESULT(OnUserPreNick(user,newnick));
1711         if (MOD_RESULT) {
1712                 statsCollisions++;
1713                 kill_link(user,"Nickname collision");
1714                 return;
1715         }
1716         if (matches_qline(newnick))
1717         {
1718                 statsCollisions++;
1719                 kill_link(user,"Nickname collision");
1720                 return;
1721         }
1722
1723         if (user)
1724         {
1725                 if (newnick)
1726                 {
1727                         strncpy(nick,newnick,MAXBUF);
1728                 }
1729                 if (user->registered == 7)
1730                 {
1731                         char* pars[1];
1732                         pars[0] = nick;
1733                         handle_nick(pars,1,user);
1734                 }
1735         }
1736 }
1737
1738
1739 int process_parameters(char **command_p,char *parameters)
1740 {
1741         int j = 0;
1742         int q = strlen(parameters);
1743         if (!q)
1744         {
1745                 /* no parameters, command_p invalid! */
1746                 return 0;
1747         }
1748         if (parameters[0] == ':')
1749         {
1750                 command_p[0] = parameters+1;
1751                 return 1;
1752         }
1753         if (q)
1754         {
1755                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
1756                 {
1757                         /* only one parameter */
1758                         command_p[0] = parameters;
1759                         if (parameters[0] == ':')
1760                         {
1761                                 if (strchr(parameters,' ') != NULL)
1762                                 {
1763                                         command_p[0]++;
1764                                 }
1765                         }
1766                         return 1;
1767                 }
1768         }
1769         command_p[j++] = parameters;
1770         for (int i = 0; i <= q; i++)
1771         {
1772                 if (parameters[i] == ' ')
1773                 {
1774                         command_p[j++] = parameters+i+1;
1775                         parameters[i] = '\0';
1776                         if (command_p[j-1][0] == ':')
1777                         {
1778                                 *command_p[j-1]++; /* remove dodgy ":" */
1779                                 break;
1780                                 /* parameter like this marks end of the sequence */
1781                         }
1782                 }
1783         }
1784         return j; /* returns total number of items in the list */
1785 }
1786
1787 void process_command(userrec *user, char* cmd)
1788 {
1789         char *parameters;
1790         char *command;
1791         char *command_p[127];
1792         char p[MAXBUF], temp[MAXBUF];
1793         int j, items, cmd_found;
1794
1795         for (int i = 0; i < 127; i++)
1796                 command_p[i] = NULL;
1797
1798         if (!user)
1799         {
1800                 return;
1801         }
1802         if (!cmd)
1803         {
1804                 return;
1805         }
1806         if (!cmd[0])
1807         {
1808                 return;
1809         }
1810
1811         int total_params = 0;
1812         if (strlen(cmd)>2)
1813         {
1814                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1815                 {
1816                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1817                         {
1818                                 total_params++;
1819                                 // found a 'trailing', we dont count them after this.
1820                                 break;
1821                         }
1822                         if (cmd[q] == ' ')
1823                                 total_params++;
1824                 }
1825         }
1826
1827         // another phidjit bug...
1828         if (total_params > 126)
1829         {
1830                 *(strchr(cmd,' ')) = '\0';
1831                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1832                 return;
1833         }
1834
1835         strlcpy(temp,cmd,MAXBUF);
1836
1837         std::string tmp = cmd;
1838         for (int i = 0; i <= MODCOUNT; i++)
1839         {
1840                 std::string oldtmp = tmp;
1841                 modules[i]->OnServerRaw(tmp,true,user);
1842                 if (oldtmp != tmp)
1843                 {
1844                         log(DEBUG,"A Module changed the input string!");
1845                         log(DEBUG,"New string: %s",tmp.c_str());
1846                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1847                         break;
1848                 }
1849         }
1850         strlcpy(cmd,tmp.c_str(),MAXBUF);
1851         strlcpy(temp,cmd,MAXBUF);
1852
1853         if (!strchr(cmd,' '))
1854         {
1855                 /* no parameters, lets skip the formalities and not chop up
1856                  * the string */
1857                 log(DEBUG,"About to preprocess command with no params");
1858                 items = 0;
1859                 command_p[0] = NULL;
1860                 parameters = NULL;
1861                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1862                 {
1863                         cmd[i] = toupper(cmd[i]);
1864                 }
1865                 command = cmd;
1866         }
1867         else
1868         {
1869                 strcpy(cmd,"");
1870                 j = 0;
1871                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1872                 for (unsigned int i = 0; i < strlen(temp); i++)
1873                 {
1874                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1875                         {
1876                                 cmd[j++] = temp[i];
1877                                 cmd[j] = 0;
1878                         }
1879                 }
1880                 /* split the full string into a command plus parameters */
1881                 parameters = p;
1882                 strcpy(p," ");
1883                 command = cmd;
1884                 if (strchr(cmd,' '))
1885                 {
1886                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1887                         {
1888                                 /* capitalise the command ONLY, leave params intact */
1889                                 cmd[i] = toupper(cmd[i]);
1890                                 /* are we nearly there yet?! :P */
1891                                 if (cmd[i] == ' ')
1892                                 {
1893                                         command = cmd;
1894                                         parameters = cmd+i+1;
1895                                         cmd[i] = '\0';
1896                                         break;
1897                                 }
1898                         }
1899                 }
1900                 else
1901                 {
1902                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1903                         {
1904                                 cmd[i] = toupper(cmd[i]);
1905                         }
1906                 }
1907
1908         }
1909         cmd_found = 0;
1910
1911         if (strlen(command)>MAXCOMMAND)
1912         {
1913                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1914                 return;
1915         }
1916
1917         for (unsigned int x = 0; x < strlen(command); x++)
1918         {
1919                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1920                 {
1921                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1922                         {
1923                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1924                                 {
1925                                         statsUnknown++;
1926                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1927                                         return;
1928                                 }
1929                         }
1930                 }
1931         }
1932
1933         for (unsigned int i = 0; i != cmdlist.size(); i++)
1934         {
1935                 if (cmdlist[i].command[0])
1936                 {
1937                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1938                         {
1939                                 if (parameters)
1940                                 {
1941                                         if (parameters[0])
1942                                         {
1943                                                 items = process_parameters(command_p,parameters);
1944                                         }
1945                                         else
1946                                         {
1947                                                 items = 0;
1948                                                 command_p[0] = NULL;
1949                                         }
1950                                 }
1951                                 else
1952                                 {
1953                                         items = 0;
1954                                         command_p[0] = NULL;
1955                                 }
1956
1957                                 if (user)
1958                                 {
1959                                         /* activity resets the ping pending timer */
1960                                         user->nping = TIME + user->pingmax;
1961                                         if ((items) < cmdlist[i].min_params)
1962                                         {
1963                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1964                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1965                                                 return;
1966                                         }
1967                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1968                                         {
1969                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1970                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1971                                                 cmd_found = 1;
1972                                                 return;
1973                                         }
1974                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1975                                         {
1976                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1977                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1978                                                 cmd_found = 1;
1979                                                 return;
1980                                         }
1981                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1982                                          * deny command! */
1983                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1984                                         {
1985                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1986                                                 {
1987                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1988                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1989                                                         return;
1990                                                 }
1991                                         }
1992                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1993                                         {
1994                                                 std::stringstream dcmds(DisabledCommands);
1995                                                 while (!dcmds.eof())
1996                                                 {
1997                                                         std::string thiscmd;
1998                                                         dcmds >> thiscmd;
1999                                                         if (!strcasecmp(thiscmd.c_str(),command))
2000                                                         {
2001                                                                 // command is disabled!
2002                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
2003                                                                 return;
2004                                                         }
2005                                                 }
2006                                         }
2007                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
2008                                         {
2009                                                 if (cmdlist[i].handler_function)
2010                                                 {
2011
2012                                                         /* ikky /stats counters */
2013                                                         if (temp)
2014                                                         {
2015                                                                 cmdlist[i].use_count++;
2016                                                                 cmdlist[i].total_bytes+=strlen(temp);
2017                                                         }
2018
2019                                                         int MOD_RESULT = 0;
2020                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
2021                                                         if (MOD_RESULT == 1) {
2022                                                                 return;
2023                                                         }
2024
2025                                                         /* WARNING: nothing may come after the
2026                                                          * command handler call, as the handler
2027                                                          * may free the user structure! */
2028
2029                                                         cmdlist[i].handler_function(command_p,items,user);
2030                                                 }
2031                                                 return;
2032                                         }
2033                                         else
2034                                         {
2035                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
2036                                                 return;
2037                                         }
2038                                 }
2039                                 cmd_found = 1;
2040                         }
2041                 }
2042         }
2043         if ((!cmd_found) && (user))
2044         {
2045                 statsUnknown++;
2046                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
2047         }
2048 }
2049
2050 bool removecommands(const char* source)
2051 {
2052         bool go_again = true;
2053         while (go_again)
2054         {
2055                 go_again = false;
2056                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
2057                 {
2058                         if (!strcmp(i->source,source))
2059                         {
2060                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
2061                                 cmdlist.erase(i);
2062                                 go_again = true;
2063                                 break;
2064                         }
2065                 }
2066         }
2067         return true;
2068 }
2069
2070
2071 void process_buffer(const char* cmdbuf,userrec *user)
2072 {
2073         if (!user)
2074         {
2075                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2076                 return;
2077         }
2078         char cmd[MAXBUF];
2079         if (!cmdbuf)
2080         {
2081                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2082                 return;
2083         }
2084         if (!cmdbuf[0])
2085         {
2086                 return;
2087         }
2088         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
2089
2090         strlcpy(cmd,cmdbuf,MAXBUF);
2091         if (!cmd[0])
2092         {
2093                 return;
2094         }
2095         int sl = strlen(cmd)-1;
2096         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2097         {
2098                 cmd[sl] = '\0';
2099         }
2100         sl = strlen(cmd)-1;
2101         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2102         {
2103                 cmd[sl] = '\0';
2104         }
2105         sl = strlen(cmd)-1;
2106         while (cmd[sl] == ' ') // strip trailing spaces
2107         {
2108                 cmd[sl] = '\0';
2109                 sl = strlen(cmd)-1;
2110         }
2111
2112         if (!cmd[0])
2113         {
2114                 return;
2115         }
2116         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
2117         tidystring(cmd);
2118         if ((user) && (cmd))
2119         {
2120                 process_command(user,cmd);
2121         }
2122 }
2123
2124 char MODERR[MAXBUF];
2125
2126 char* ModuleError()
2127 {
2128         return MODERR;
2129 }
2130
2131 void erase_factory(int j)
2132 {
2133         int v = 0;
2134         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
2135         {
2136                 if (v == j)
2137                 {
2138                         factory.erase(t);
2139                         factory.push_back(NULL);
2140                         return;
2141                 }
2142                 v++;
2143         }
2144 }
2145
2146 void erase_module(int j)
2147 {
2148         int v1 = 0;
2149         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
2150         {
2151                 if (v1 == j)
2152                 {
2153                         delete *m;
2154                         modules.erase(m);
2155                         modules.push_back(NULL);
2156                         break;
2157                 }
2158                 v1++;
2159         }
2160         int v2 = 0;
2161         for (std::vector<std::string>::iterator v = module_names.begin(); v != module_names.end(); v++)
2162         {
2163                 if (v2 == j)
2164                 {
2165                        module_names.erase(v);
2166                        break;
2167                 }
2168                 v2++;
2169         }
2170
2171 }
2172
2173 bool UnloadModule(const char* filename)
2174 {
2175         std::string filename_str = filename;
2176         for (unsigned int j = 0; j != module_names.size(); j++)
2177         {
2178                 if (module_names[j] == filename_str)
2179                 {
2180                         if (modules[j]->GetVersion().Flags & VF_STATIC)
2181                         {
2182                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
2183                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
2184                                 return false;
2185                         }
2186                         /* Give the module a chance to tidy out all its metadata */
2187                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
2188                         {
2189                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
2190                         }
2191                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
2192                         {
2193                                 modules[j]->OnCleanup(TYPE_USER,u->second);
2194                         }
2195                         FOREACH_MOD OnUnloadModule(modules[j],module_names[j]);
2196                         // found the module
2197                         log(DEBUG,"Deleting module...");
2198                         erase_module(j);
2199                         log(DEBUG,"Erasing module entry...");
2200                         erase_factory(j);
2201                         log(DEBUG,"Removing dependent commands...");
2202                         removecommands(filename);
2203                         log(DEFAULT,"Module %s unloaded",filename);
2204                         MODCOUNT--;
2205                         return true;
2206                 }
2207         }
2208         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
2209         snprintf(MODERR,MAXBUF,"Module not loaded");
2210         return false;
2211 }
2212
2213 bool LoadModule(const char* filename)
2214 {
2215         char modfile[MAXBUF];
2216 #ifdef STATIC_LINK
2217         snprintf(modfile,MAXBUF,"%s",filename);
2218 #else
2219         snprintf(modfile,MAXBUF,"%s/%s",ModPath,filename);
2220 #endif
2221         std::string filename_str = filename;
2222 #ifndef STATIC_LINK
2223         if (!DirValid(modfile))
2224         {
2225                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
2226                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
2227                 return false;
2228         }
2229 #endif
2230         log(DEBUG,"Loading module: %s",modfile);
2231 #ifndef STATIC_LINK
2232         if (FileExists(modfile))
2233         {
2234 #endif
2235                 for (unsigned int j = 0; j < module_names.size(); j++)
2236                 {
2237                         if (module_names[j] == filename_str)
2238                         {
2239                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
2240                                 snprintf(MODERR,MAXBUF,"Module already loaded");
2241                                 return false;
2242                         }
2243                 }
2244                 ircd_module* a = new ircd_module(modfile);
2245                 factory[MODCOUNT+1] = a;
2246                 if (factory[MODCOUNT+1]->LastError())
2247                 {
2248                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
2249                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
2250                         MODCOUNT--;
2251                         return false;
2252                 }
2253                 if (factory[MODCOUNT+1]->factory)
2254                 {
2255                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
2256                         modules[MODCOUNT+1] = m;
2257                         /* save the module and the module's classfactory, if
2258                          * this isnt done, random crashes can occur :/ */
2259                         module_names.push_back(filename);
2260                 }
2261                 else
2262                 {
2263                         log(DEFAULT,"Unable to load %s",modfile);
2264                         snprintf(MODERR,MAXBUF,"Factory function failed!");
2265                         return false;
2266                 }
2267 #ifndef STATIC_LINK
2268         }
2269         else
2270         {
2271                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
2272                 snprintf(MODERR,MAXBUF,"Module file could not be found");
2273                 return false;
2274         }
2275 #endif
2276         MODCOUNT++;
2277         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
2278         return true;
2279 }
2280
2281 int BindPorts()
2282 {
2283         int clientportcount = 0;
2284         for (int count = 0; count < ConfValueEnum("bind",&config_f); count++)
2285         {
2286                 ConfValue("bind","port",count,configToken,&config_f);
2287                 ConfValue("bind","address",count,Addr,&config_f);
2288                 ConfValue("bind","type",count,Type,&config_f);
2289                 if (strcmp(Type,"servers"))
2290                 {
2291                         // modules handle server bind types now,
2292                         // its not a typo in the strcmp.
2293                         ports[clientportcount] = atoi(configToken);
2294                         strlcpy(addrs[clientportcount],Addr,256);
2295                         clientportcount++;
2296                         log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
2297                 }
2298         }
2299         portCount = clientportcount;
2300
2301         for (int count = 0; count < portCount; count++)
2302         {
2303                 if ((openSockfd[boundPortCount] = OpenTCPSocket()) == ERROR)
2304                 {
2305                         log(DEBUG,"InspIRCd: startup: bad fd %lu",(unsigned long)openSockfd[boundPortCount]);
2306                         return(ERROR);
2307                 }
2308                 if (BindSocket(openSockfd[boundPortCount],client,server,ports[count],addrs[count]) == ERROR)
2309                 {
2310                         log(DEFAULT,"InspIRCd: startup: failed to bind port %lu",(unsigned long)ports[count]);
2311                 }
2312                 else    /* well we at least bound to one socket so we'll continue */
2313                 {
2314                         boundPortCount++;
2315                 }
2316         }
2317
2318         /* if we didn't bind to anything then abort */
2319         if (!boundPortCount)
2320         {
2321                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
2322                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)portCount);
2323                 return (ERROR);
2324         }
2325
2326         return boundPortCount;
2327 }
2328
2329 int InspIRCd(char** argv, int argc)
2330 {
2331         bool expire_run = false;
2332         std::vector<int> activefds;
2333         int incomingSockfd;
2334         int in_port;
2335         userrec* cu = NULL;
2336         InspSocket* s = NULL;
2337         InspSocket* s_del = NULL;
2338         char* target;
2339         unsigned int numberactive;
2340         sockaddr_in sock_us;     // our port number
2341         socklen_t uslen;         // length of our port number
2342
2343         /* Beta 7 moved all this stuff out of the main function
2344          * into smaller sub-functions, much tidier -- Brain
2345          */
2346         OpenLog(argv, argc);
2347         CheckRoot();
2348         SetupCommandTable();
2349         ReadConfig(true,NULL);
2350         AddServerName(ServerName);
2351         CheckDie();
2352         boundPortCount = BindPorts();
2353
2354         printf("\n");
2355         startup_time = time(NULL);
2356
2357         char PID[MAXBUF];
2358         ConfValue("pid","file",0,PID,&config_f);
2359         // write once here, to try it out and make sure its ok
2360         WritePID(PID);
2361
2362         if (!nofork)
2363         {
2364                 if (DaemonSeed() == ERROR)
2365                 {
2366                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
2367                         Exit(ERROR);
2368                 }
2369         }
2370
2371         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
2372          * initialize the socket engine.
2373          */
2374         SE = new SocketEngine();
2375
2376         /* We must load the modules AFTER initializing the socket engine, now */
2377         LoadAllModules();
2378
2379         printf("\nInspIRCd is now running!\n");
2380         if (!nofork)
2381         {
2382                 freopen("/dev/null","w",stdout);
2383                 freopen("/dev/null","w",stderr);
2384         }
2385
2386         /* Add the listening sockets used for client inbound connections
2387          * to the socket engine
2388          */
2389         for (int count = 0; count < portCount; count++)
2390                 SE->AddFd(openSockfd[count],true,X_LISTEN);
2391
2392         WritePID(PID);
2393
2394         /* main loop, this never returns */
2395         for (;;)
2396         {
2397                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
2398                  * Once per loop iteration is pleanty.
2399                  */
2400                 OLDTIME = TIME;
2401                 TIME = time(NULL);
2402
2403                 /* Run background module timers every few seconds
2404                  * (the docs say modules shouldnt rely on accurate
2405                  * timing using this event, so we dont have to
2406                  * time this exactly).
2407                  */
2408                 if (((TIME % 8) == 0) && (!expire_run))
2409                 {
2410                         expire_lines();
2411                         FOREACH_MOD OnBackgroundTimer(TIME);
2412                         expire_run = true;
2413                         continue;
2414                 }
2415                 if ((TIME % 8) == 1)
2416                         expire_run = false;
2417
2418                 /* Once a second, do the background processing */
2419                 if (TIME != OLDTIME)
2420                         while (DoBackgroundUserStuff(TIME));
2421
2422                 /* Call the socket engine to wait on the active
2423                  * file descriptors. The socket engine has everything's
2424                  * descriptors in its list... dns, modules, users,
2425                  * servers... so its nice and easy, just one call.
2426                  */
2427                 SE->Wait(activefds);
2428
2429                 /**
2430                  * Now process each of the fd's. For users, we have a fast
2431                  * lookup table which can find a user by file descriptor, so
2432                  * processing them by fd isnt expensive. If we have a lot of
2433                  * listening ports or module sockets though, things could get
2434                  * ugly.
2435                  */
2436                 numberactive = activefds.size();
2437                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
2438                 {
2439                         int socket_type = SE->GetType(activefds[activefd]);
2440                         switch (socket_type)
2441                         {
2442                                 case X_ESTAB_CLIENT:
2443
2444                                         cu = fd_ref_table[activefds[activefd]];
2445                                         if (cu)
2446                                                 ProcessUser(cu);
2447
2448                                 break;
2449
2450                                 case X_ESTAB_MODULE:
2451
2452                                         /* Process module-owned sockets.
2453                                          * Modules are encouraged to inherit their sockets from
2454                                          * InspSocket so we can process them neatly like this.
2455                                          */
2456                                         s = socket_ref[activefds[activefd]];
2457
2458                                         if ((s) && (!s->Poll()))
2459                                         {
2460                                                 log(DEBUG,"Socket poll returned false, close and bail");
2461                                                 SE->DelFd(s->GetFd());
2462                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
2463                                                 {
2464                                                         s_del = (InspSocket*)*a;
2465                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
2466                                                         {
2467                                                                 module_sockets.erase(a);
2468                                                                 break;
2469                                                         }
2470                                                 }
2471                                                 s->Close();
2472                                                 delete s;
2473                                         }
2474
2475                                 break;
2476
2477                                 case X_ESTAB_DNS:
2478
2479                                         /* When we are using single-threaded dns,
2480                                          * the sockets for dns end up in our mainloop.
2481                                          * When we are using multi-threaded dns,
2482                                          * each thread has its own basic poll() loop
2483                                          * within it, making them 'fire and forget'
2484                                          * and independent of the mainloop.
2485                                          */
2486 #ifndef THREADED_DNS
2487                                         dns_poll(activefds[activefd]);
2488 #endif
2489                                 break;
2490
2491                                 case X_LISTEN:
2492
2493                                         /* It's a listener */
2494                                         uslen = sizeof(sock_us);
2495                                         length = sizeof(client);
2496                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
2497                                         if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen))
2498                                         {
2499                                                 in_port = ntohs(sock_us.sin_port);
2500                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
2501                                                 target = (char*)inet_ntoa(client.sin_addr);
2502                                                 /* Years and years ago, we used to resolve here
2503                                                  * using gethostbyaddr(). That is sucky and we
2504                                                  * don't do that any more...
2505                                                  */
2506                                                 if (incomingSockfd >= 0)
2507                                                 {
2508                                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, target, in_port);
2509                                                         statsAccept++;
2510                                                         AddClient(incomingSockfd, target, in_port, false, target);
2511                                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
2512                                                 }
2513                                                 else
2514                                                 {
2515                                                         WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target);
2516                                                         log(DEBUG,"accept failed: %lu",(unsigned long)in_port);
2517                                                         statsRefused++;
2518                                                 }
2519                                         }
2520                                         else
2521                                         {
2522                                                 log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd);
2523                                                 shutdown(incomingSockfd,2);
2524                                                 close(incomingSockfd);
2525                                         }
2526                                 break;
2527
2528                                 default:
2529                                         /* Something went wrong if we're in here.
2530                                          * In fact, so wrong, im not quite sure
2531                                          * what we would do, so for now, its going
2532                                          * to safely do bugger all.
2533                                          */
2534                                 break;
2535                         }
2536                 }
2537
2538         }
2539         /* This is never reached -- we hope! */
2540         return 0;
2541 }
2542