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
  31 #ifdef USE_KQUEUE
  32 #include <sys/types.h>
  33 #include <sys/event.h>
  34 #include <sys/time.h>
  35 #endif
  36
  37 #ifdef USE_EPOLL
  38 #include <sys/epoll.h>
  39 #define EP_DELAY 50
  40 #endif
  41
  42 #include <time.h>
  43 #include <string>
  44 #ifdef GCC3
  45 #include <ext/hash_map>
  46 #else
  47 #include <hash_map>
  48 #endif
  49 #include <map>
  50 #include <sstream>
  51 #include <vector>
  52 #include <deque>
  53 #include <sched.h>
  54 #ifdef THREADED_DNS
  55 #include <pthread.h>
  56 #endif
  57 #include "users.h"
  58 #include "ctables.h"
  59 #include "globals.h"
  60 #include "modules.h"
  61 #include "dynamic.h"
  62 #include "wildcard.h"
  63 #include "message.h"
  64 #include "mode.h"
  65 #include "commands.h"
  66 #include "xline.h"
  67 #include "inspstring.h"
  68 #include "dnsqueue.h"
  69 #include "helperfuncs.h"
  70 #include "hashcomp.h"
  71 #include "socketengine.h"
  72 #include "socket.h"
  73 #include "dns.h"
  74
  75 int LogLevel = DEFAULT;
  76 char ServerName[MAXBUF];
  77 char Network[MAXBUF];
  78 char ServerDesc[MAXBUF];
  79 char AdminName[MAXBUF];
  80 char AdminEmail[MAXBUF];
  81 char AdminNick[MAXBUF];
  82 char diepass[MAXBUF];
  83 char restartpass[MAXBUF];
  84 char motd[MAXBUF];
  85 char rules[MAXBUF];
  86 char list[MAXBUF];
  87 char PrefixQuit[MAXBUF];
  88 char DieValue[MAXBUF];
  89 char DNSServer[MAXBUF];
  90 int debugging =  0;
  91 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  92 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  93 int DieDelay  =  5;
  94 time_t startup_time = time(NULL);
  95 int NetBufferSize = 10240;      // NetBufferSize used as the buffer size for all read() ops
  96 int MaxConn = SOMAXCONN;        // size of accept() backlog (128 by default on *BSD)
  97 unsigned int SoftLimit = MAXCLIENTS;
  98 extern int MaxWhoResults;
  99 time_t nb_start = 0;
 100 int dns_timeout = 5;
 101
 102 char DisabledCommands[MAXBUF];
 103
 104 bool AllowHalfop = true;
 105 bool AllowProtect = true;
 106 bool AllowFounder = true;
 107
 108 extern std::vector<Module*> modules;
 109 std::vector<std::string> module_names;
 110 extern std::vector<ircd_module*> factory;
 111
 112 std::vector<InspSocket*> module_sockets;
 113
 114 extern int MODCOUNT;
 115 int openSockfd[MAXSOCKS];
 116 bool nofork = false;
 117 bool unlimitcore = false;
 118
 119 time_t TIME = time(NULL), OLDTIME = time(NULL);
 120
 121 #ifdef USE_KQUEUE
 122 int kq, lkq, skq;
 123 #endif
 124
 125 #ifdef USE_EPOLL
 126 int ep, lep, sep;
 127 #endif
 128
 129 bool has_been_netsplit = false;
 130 extern std::vector<std::string> include_stack;
 131
 132 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
 133 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
 134 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, irc::InAddr_HashComp> address_cache;
 135 typedef nspace::hash_map<std::string, WhoWasUser*, nspace::hash<string>, irc::StrHashComp> whowas_hash;
 136 typedef std::deque<command_t> command_table;
 137 typedef std::map<std::string,time_t> autoconnects;
 138 typedef std::vector<std::string> servernamelist;
 139
 140 // This table references users by file descriptor.
 141 // its an array to make it VERY fast, as all lookups are referenced
 142 // by an integer, meaning there is no need for a scan/search operation.
 143 userrec* fd_ref_table[65536];
 144
 145 int statsAccept = 0, statsRefused = 0, statsUnknown = 0, statsCollisions = 0, statsDns = 0, statsDnsGood = 0, statsDnsBad = 0, statsConnects = 0, statsSent= 0, statsRecv = 0;
 146
 147
 148
 149 FILE *log_file;
 150
 151 user_hash clientlist;
 152 chan_hash chanlist;
 153 whowas_hash whowas;
 154 command_table cmdlist;
 155 autoconnects autoconns;
 156 file_cache MOTD;
 157 file_cache RULES;
 158 address_cache IP;
 159
 160 ClassVector Classes;
 161 servernamelist servernames;
 162
 163 struct linger linger = { 0 };
 164 char MyExecutable[1024];
 165 int boundPortCount = 0;
 166 int portCount = 0, SERVERportCount = 0, ports[MAXSOCKS];
 167
 168 char ModPath[MAXBUF];
 169
 170 /* prototypes */
 171
 172 int has_channel(userrec *u, chanrec *c);
 173 int usercount(chanrec *c);
 174 int usercount_i(chanrec *c);
 175 char* Passwd(userrec *user);
 176 bool IsDenied(userrec *user);
 177 void AddWhoWas(userrec* u);
 178
 179 std::stringstream config_f(stringstream::in | stringstream::out);
 180
 181 std::vector<userrec*> all_opers;
 182
 183 char lowermap[255];
 184
 185 void AddOper(userrec* user)
 186 {
 187         log(DEBUG,"Oper added to optimization list");
 188         all_opers.push_back(user);
 189 }
 190
 191 void AddServerName(std::string servername)
 192 {
 193         log(DEBUG,"Adding server name: %s",servername.c_str());
 194         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 195         {
 196                 if (*a == servername)
 197                         return;
 198         }
 199         servernames.push_back(servername);
 200 }
 201
 202 const char* FindServerNamePtr(std::string servername)
 203 {
 204         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 205         {
 206                 if (*a == servername)
 207                         return a->c_str();
 208         }
 209         AddServerName(servername);
 210         return FindServerNamePtr(servername);
 211 }
 212
 213 void DeleteOper(userrec* user)
 214 {
 215         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 216         {
 217                 if (*a == user)
 218                 {
 219                         log(DEBUG,"Oper removed from optimization list");
 220                         all_opers.erase(a);
 221                         return;
 222                 }
 223         }
 224 }
 225
 226 std::string GetRevision()
 227 {
 228         char Revision[] = "$Revision$";
 229         char *s1 = Revision;
 230         char *savept;
 231         char *v2 = strtok_r(s1," ",&savept);
 232         s1 = savept;
 233         v2 = strtok_r(s1," ",&savept);
 234         s1 = savept;
 235         return std::string(v2);
 236 }
 237
 238
 239 std::string getservername()
 240 {
 241         return ServerName;
 242 }
 243
 244 std::string getserverdesc()
 245 {
 246         return ServerDesc;
 247 }
 248
 249 std::string getnetworkname()
 250 {
 251         return Network;
 252 }
 253
 254 std::string getadminname()
 255 {
 256         return AdminName;
 257 }
 258
 259 std::string getadminemail()
 260 {
 261         return AdminEmail;
 262 }
 263
 264 std::string getadminnick()
 265 {
 266         return AdminNick;
 267 }
 268
 269 void ReadConfig(bool bail, userrec* user)
 270 {
 271         char dbg[MAXBUF],pauseval[MAXBUF],Value[MAXBUF],timeout[MAXBUF],NB[MAXBUF],flood[MAXBUF],MW[MAXBUF],MCON[MAXBUF];
 272         char AH[MAXBUF],AP[MAXBUF],AF[MAXBUF],DNT[MAXBUF],pfreq[MAXBUF],thold[MAXBUF],sqmax[MAXBUF],rqmax[MAXBUF],SLIMT[MAXBUF];
 273         ConnectClass c;
 274         std::stringstream errstr;
 275         include_stack.clear();
 276
 277         if (!LoadConf(CONFIG_FILE,&config_f,&errstr))
 278         {
 279                 errstr.seekg(0);
 280                 log(DEFAULT,"There were errors in your configuration:\n%s",errstr.str().c_str());
 281                 if (bail)
 282                 {
 283                         printf("There were errors in your configuration:\n%s",errstr.str().c_str());
 284                         Exit(0);
 285                 }
 286                 else
 287                 {
 288                         char dataline[1024];
 289                         if (user)
 290                         {
 291                                 WriteServ(user->fd,"NOTICE %s :There were errors in the configuration file:",user->nick);
 292                                 while (!errstr.eof())
 293                                 {
 294                                         errstr.getline(dataline,1024);
 295                                         WriteServ(user->fd,"NOTICE %s :%s",user->nick,dataline);
 296                                 }
 297                         }
 298                         else
 299                         {
 300                                 WriteOpers("There were errors in the configuration file:");
 301                                 while (!errstr.eof())
 302                                 {
 303                                         errstr.getline(dataline,1024);
 304                                         WriteOpers(dataline);
 305                                 }
 306                         }
 307                         return;
 308                 }
 309         }
 310
 311         ConfValue("server","name",0,ServerName,&config_f);
 312         ConfValue("server","description",0,ServerDesc,&config_f);
 313         ConfValue("server","network",0,Network,&config_f);
 314         ConfValue("admin","name",0,AdminName,&config_f);
 315         ConfValue("admin","email",0,AdminEmail,&config_f);
 316         ConfValue("admin","nick",0,AdminNick,&config_f);
 317         ConfValue("files","motd",0,motd,&config_f);
 318         ConfValue("files","rules",0,rules,&config_f);
 319         ConfValue("power","diepass",0,diepass,&config_f);
 320         ConfValue("power","pause",0,pauseval,&config_f);
 321         ConfValue("power","restartpass",0,restartpass,&config_f);
 322         ConfValue("options","prefixquit",0,PrefixQuit,&config_f);
 323         ConfValue("die","value",0,DieValue,&config_f);
 324         ConfValue("options","loglevel",0,dbg,&config_f);
 325         ConfValue("options","netbuffersize",0,NB,&config_f);
 326         ConfValue("options","maxwho",0,MW,&config_f);
 327         ConfValue("options","allowhalfop",0,AH,&config_f);
 328         ConfValue("options","allowprotect",0,AP,&config_f);
 329         ConfValue("options","allowfounder",0,AF,&config_f);
 330         ConfValue("dns","server",0,DNSServer,&config_f);
 331         ConfValue("dns","timeout",0,DNT,&config_f);
 332         ConfValue("options","moduledir",0,ModPath,&config_f);
 333         ConfValue("disabled","commands",0,DisabledCommands,&config_f);
 334         ConfValue("options","somaxconn",0,MCON,&config_f);
 335         ConfValue("options","softlimit",0,SLIMT,&config_f);
 336
 337         SoftLimit = atoi(SLIMT);
 338         if ((SoftLimit < 1) || (SoftLimit > MAXCLIENTS))
 339         {
 340                 log(DEFAULT,"WARNING: <options:softlimit> value is greater than %d or less than 0, set to %d.",MAXCLIENTS,MAXCLIENTS);
 341                 SoftLimit = MAXCLIENTS;
 342         }
 343         MaxConn = atoi(MCON);
 344         if (MaxConn > SOMAXCONN)
 345                 log(DEFAULT,"WARNING: <options:somaxconn> value may be higher than the system-defined SOMAXCONN value!");
 346         NetBufferSize = atoi(NB);
 347         MaxWhoResults = atoi(MW);
 348         dns_timeout = atoi(DNT);
 349         if (!dns_timeout)
 350                 dns_timeout = 5;
 351         if (!MaxConn)
 352                 MaxConn = SOMAXCONN;
 353         if (!DNSServer[0])
 354                 strlcpy(DNSServer,"127.0.0.1",MAXBUF);
 355         if (!ModPath[0])
 356                 strlcpy(ModPath,MOD_PATH,MAXBUF);
 357         AllowHalfop = ((!strcasecmp(AH,"true")) || (!strcasecmp(AH,"1")) || (!strcasecmp(AH,"yes")));
 358         AllowProtect = ((!strcasecmp(AP,"true")) || (!strcasecmp(AP,"1")) || (!strcasecmp(AP,"yes")));
 359         AllowFounder = ((!strcasecmp(AF,"true")) || (!strcasecmp(AF,"1")) || (!strcasecmp(AF,"yes")));
 360         if ((!NetBufferSize) || (NetBufferSize > 65535) || (NetBufferSize < 1024))
 361         {
 362                 log(DEFAULT,"No NetBufferSize specified or size out of range, setting to default of 10240.");
 363                 NetBufferSize = 10240;
 364         }
 365         if ((!MaxWhoResults) || (MaxWhoResults > 65535) || (MaxWhoResults < 1))
 366         {
 367                 log(DEFAULT,"No MaxWhoResults specified or size out of range, setting to default of 128.");
 368                 MaxWhoResults = 128;
 369         }
 370         if (!strcmp(dbg,"debug"))
 371                 LogLevel = DEBUG;
 372         if (!strcmp(dbg,"verbose"))
 373                 LogLevel = VERBOSE;
 374         if (!strcmp(dbg,"default"))
 375                 LogLevel = DEFAULT;
 376         if (!strcmp(dbg,"sparse"))
 377                 LogLevel = SPARSE;
 378         if (!strcmp(dbg,"none"))
 379                 LogLevel = NONE;
 380         readfile(MOTD,motd);
 381         log(DEFAULT,"Reading message of the day...");
 382         readfile(RULES,rules);
 383         log(DEFAULT,"Reading connect classes...");
 384         Classes.clear();
 385         for (int i = 0; i < ConfValueEnum("connect",&config_f); i++)
 386         {
 387                 strcpy(Value,"");
 388                 ConfValue("connect","allow",i,Value,&config_f);
 389                 ConfValue("connect","timeout",i,timeout,&config_f);
 390                 ConfValue("connect","flood",i,flood,&config_f);
 391                 ConfValue("connect","pingfreq",i,pfreq,&config_f);
 392                 ConfValue("connect","threshold",i,thold,&config_f);
 393                 ConfValue("connect","sendq",i,sqmax,&config_f);
 394                 ConfValue("connect","recvq",i,rqmax,&config_f);
 395                 if (Value[0])
 396                 {
 397                         strlcpy(c.host,Value,MAXBUF);
 398                         c.type = CC_ALLOW;
 399                         strlcpy(Value,"",MAXBUF);
 400                         ConfValue("connect","password",i,Value,&config_f);
 401                         strlcpy(c.pass,Value,MAXBUF);
 402                         c.registration_timeout = 90; // default is 2 minutes
 403                         c.pingtime = 120;
 404                         c.flood = atoi(flood);
 405                         c.threshold = 5;
 406                         c.sendqmax = 262144; // 256k
 407                         c.recvqmax = 4096;   // 4k
 408                         if (atoi(thold)>0)
 409                         {
 410                                 c.threshold = atoi(thold);
 411                         }
 412                         if (atoi(sqmax)>0)
 413                         {
 414                                 c.sendqmax = atoi(sqmax);
 415                         }
 416                         if (atoi(rqmax)>0)
 417                         {
 418                                 c.recvqmax = atoi(rqmax);
 419                         }
 420                         if (atoi(timeout)>0)
 421                         {
 422                                 c.registration_timeout = atoi(timeout);
 423                         }
 424                         if (atoi(pfreq)>0)
 425                         {
 426                                 c.pingtime = atoi(pfreq);
 427                         }
 428                         Classes.push_back(c);
 429                         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);
 430                 }
 431                 else
 432                 {
 433                         ConfValue("connect","deny",i,Value,&config_f);
 434                         strlcpy(c.host,Value,MAXBUF);
 435                         c.type = CC_DENY;
 436                         Classes.push_back(c);
 437                         log(DEBUG,"Read connect class type DENY, host=%s",c.host);
 438                 }
 439
 440         }
 441         log(DEFAULT,"Reading K lines,Q lines and Z lines from config...");
 442         read_xline_defaults();
 443         log(DEFAULT,"Applying K lines, Q lines and Z lines...");
 444         apply_lines();
 445
 446         autoconns.clear();
 447         for (int i = 0; i < ConfValueEnum("link",&config_f); i++)
 448         {
 449                 char Link_ServerName[MAXBUF],Link_AConn[MAXBUF];
 450                 ConfValue("link","name",i,Link_ServerName,&config_f);
 451                 ConfValue("link","autoconnect",i,Link_AConn,&config_f);
 452                 if (strcmp(Link_AConn,""))
 453                 {
 454                         autoconns[std::string(Link_ServerName)] = atoi(Link_AConn) + time(NULL);
 455                 }
 456         }
 457
 458
 459         log(DEFAULT,"Done reading configuration file, InspIRCd is now starting.");
 460         if (!bail)
 461         {
 462                 log(DEFAULT,"Adding and removing modules due to rehash...");
 463
 464                 std::vector<std::string> old_module_names, new_module_names, added_modules, removed_modules;
 465
 466                 // store the old module names
 467                 for (std::vector<std::string>::iterator t = module_names.begin(); t != module_names.end(); t++)
 468                 {
 469                         old_module_names.push_back(*t);
 470                 }
 471
 472                 // get the new module names
 473                 for (int count2 = 0; count2 < ConfValueEnum("module",&config_f); count2++)
 474                 {
 475                         ConfValue("module","name",count2,Value,&config_f);
 476                         new_module_names.push_back(Value);
 477                 }
 478
 479                 // now create a list of new modules that are due to be loaded
 480                 // and a seperate list of modules which are due to be unloaded
 481                 for (std::vector<std::string>::iterator _new = new_module_names.begin(); _new != new_module_names.end(); _new++)
 482                 {
 483                         bool added = true;
 484                         for (std::vector<std::string>::iterator old = old_module_names.begin(); old != old_module_names.end(); old++)
 485                         {
 486                                 if (*old == *_new)
 487                                         added = false;
 488                         }
 489                         if (added)
 490                                 added_modules.push_back(*_new);
 491                 }
 492                 for (std::vector<std::string>::iterator oldm = old_module_names.begin(); oldm != old_module_names.end(); oldm++)
 493                 {
 494                         bool removed = true;
 495                         for (std::vector<std::string>::iterator newm = new_module_names.begin(); newm != new_module_names.end(); newm++)
 496                         {
 497                                 if (*newm == *oldm)
 498                                         removed = false;
 499                         }
 500                         if (removed)
 501                                 removed_modules.push_back(*oldm);
 502                 }
 503                 // now we have added_modules, a vector of modules to be loaded, and removed_modules, a vector of modules
 504                 // to be removed.
 505                 int rem = 0, add = 0;
 506                 if (!removed_modules.empty())
 507                 for (std::vector<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 508                 {
 509                         if (UnloadModule(removing->c_str()))
 510                         {
 511                                 WriteOpers("*** REHASH UNLOADED MODULE: %s",removing->c_str());
 512                                 WriteServ(user->fd,"973 %s %s :Module %s successfully unloaded.",user->nick, removing->c_str(), removing->c_str());
 513                                 rem++;
 514                         }
 515                         else
 516                         {
 517                                 WriteServ(user->fd,"972 %s %s :Failed to unload module %s: %s",user->nick, removing->c_str(), removing->c_str(), ModuleError());
 518                         }
 519                 }
 520                 if (!added_modules.empty())
 521                 for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 522                 {
 523                         if (LoadModule(adding->c_str()))
 524                         {
 525                                 WriteOpers("*** REHASH LOADED MODULE: %s",adding->c_str());
 526                                 WriteServ(user->fd,"975 %s %s :Module %s successfully loaded.",user->nick, adding->c_str(), adding->c_str());
 527                                 add++;
 528                         }
 529                         else
 530                         {
 531                                 WriteServ(user->fd,"974 %s %s :Failed to load module %s: %s",user->nick, adding->c_str(), adding->c_str(), ModuleError());
 532                         }
 533                 }
 534                 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());
 535         }
 536 }
 537
 538
 539 /* add a channel to a user, creating the record for it if needed and linking
 540  * it to the user record */
 541
 542 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 543 {
 544         if ((!user) || (!cn))
 545         {
 546                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 547                 return 0;
 548         }
 549
 550         chanrec* Ptr;
 551         int created = 0;
 552         char cname[MAXBUF];
 553
 554         strncpy(cname,cn,MAXBUF);
 555
 556         // we MUST declare this wherever we use FOREACH_RESULT
 557         int MOD_RESULT = 0;
 558
 559         if (strlen(cname) > CHANMAX)
 560         {
 561                 cname[CHANMAX] = '\0';
 562         }
 563
 564         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 565
 566         if ((FindChan(cname)) && (has_channel(user,FindChan(cname))))
 567         {
 568                 return NULL; // already on the channel!
 569         }
 570
 571
 572         if (!FindChan(cname))
 573         {
 574                 MOD_RESULT = 0;
 575                 FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
 576                 if (MOD_RESULT == 1) {
 577                         return NULL;
 578                 }
 579
 580                 /* create a new one */
 581                 log(DEBUG,"add_channel: creating: %s",cname);
 582                 {
 583                         chanlist[cname] = new chanrec();
 584
 585                         strlcpy(chanlist[cname]->name, cname,CHANMAX);
 586                         chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 587                         chanlist[cname]->created = TIME;
 588                         strcpy(chanlist[cname]->topic, "");
 589                         strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
 590                         chanlist[cname]->topicset = 0;
 591                         Ptr = chanlist[cname];
 592                         log(DEBUG,"add_channel: created: %s",cname);
 593                         /* set created to 2 to indicate user
 594                          * is the first in the channel
 595                          * and should be given ops */
 596                         created = 2;
 597                 }
 598         }
 599         else
 600         {
 601                 /* channel exists, just fish out a pointer to its struct */
 602                 Ptr = FindChan(cname);
 603                 if (Ptr)
 604                 {
 605                         log(DEBUG,"add_channel: joining to: %s",Ptr->name);
 606
 607                         // the override flag allows us to bypass channel modes
 608                         // and bans (used by servers)
 609                         if ((!override) || (!strcasecmp(user->server,ServerName)))
 610                         {
 611                                 log(DEBUG,"Not overriding...");
 612                                 MOD_RESULT = 0;
 613                                 FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
 614                                 if (MOD_RESULT == 1) {
 615                                         return NULL;
 616                                 }
 617                                 log(DEBUG,"MOD_RESULT=%d",MOD_RESULT);
 618
 619                                 if (!MOD_RESULT)
 620                                 {
 621                                         log(DEBUG,"add_channel: checking key, invite, etc");
 622                                         MOD_RESULT = 0;
 623                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
 624                                         if (MOD_RESULT == 0)
 625                                         {
 626                                                 if (Ptr->key[0])
 627                                                 {
 628                                                         log(DEBUG,"add_channel: %s has key %s",Ptr->name,Ptr->key);
 629                                                         if (!key)
 630                                                         {
 631                                                                 log(DEBUG,"add_channel: no key given in JOIN");
 632                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 633                                                                 return NULL;
 634                                                         }
 635                                                         else
 636                                                         {
 637                                                                 if (strcasecmp(key,Ptr->key))
 638                                                                 {
 639                                                                         log(DEBUG,"add_channel: bad key given in JOIN");
 640                                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 641                                                                         return NULL;
 642                                                                 }
 643                                                         }
 644                                                 }
 645                                                 log(DEBUG,"add_channel: no key");
 646                                         }
 647                                         MOD_RESULT = 0;
 648                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 649                                         if (MOD_RESULT == 0)
 650                                         {
 651                                                 if (Ptr->binarymodes & CM_INVITEONLY)
 652                                                 {
 653                                                         log(DEBUG,"add_channel: channel is +i");
 654                                                         if (user->IsInvited(Ptr->name))
 655                                                         {
 656                                                                 /* user was invited to channel */
 657                                                                 /* there may be an optional channel NOTICE here */
 658                                                         }
 659                                                         else
 660                                                         {
 661                                                                 WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 662                                                                 return NULL;
 663                                                         }
 664                                                 }
 665                                                 log(DEBUG,"add_channel: channel is not +i");
 666                                         }
 667                                         MOD_RESULT = 0;
 668                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 669                                         if (MOD_RESULT == 0)
 670                                         {
 671                                                 if (Ptr->limit)
 672                                                 {
 673                                                         if (usercount(Ptr) >= Ptr->limit)
 674                                                         {
 675                                                                 WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 676                                                                 return NULL;
 677                                                         }
 678                                                 }
 679                                         }
 680                                         log(DEBUG,"add_channel: about to walk banlist");
 681                                         MOD_RESULT = 0;
 682                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 683                                         if (MOD_RESULT == 0)
 684                                         {
 685                                                 /* check user against the channel banlist */
 686                                                 if (Ptr)
 687                                                 {
 688                                                         if (Ptr->bans.size())
 689                                                         {
 690                                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 691                                                                 {
 692                                                                         if (match(user->GetFullHost(),i->data))
 693                                                                         {
 694                                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 695                                                                                 return NULL;
 696                                                                         }
 697                                                                 }
 698                                                         }
 699                                                 }
 700                                                 log(DEBUG,"add_channel: bans checked");
 701                                         }
 702
 703                                 }
 704
 705
 706                                 if ((Ptr) && (user))
 707                                 {
 708                                         user->RemoveInvite(Ptr->name);
 709                                 }
 710
 711                                 log(DEBUG,"add_channel: invites removed");
 712
 713                         }
 714                         else
 715                         {
 716                                 log(DEBUG,"Overridden checks");
 717                         }
 718
 719
 720                 }
 721                 created = 1;
 722         }
 723
 724         log(DEBUG,"Passed channel checks");
 725
 726         for (int index =0; index != MAXCHANS; index++)
 727         {
 728                 log(DEBUG,"Check location %d",index);
 729                 if (user->chans[index].channel == NULL)
 730                 {
 731                         log(DEBUG,"Adding into their channel list at location %d",index);
 732
 733                         if (created == 2)
 734                         {
 735                                 /* first user in is given ops */
 736                                 user->chans[index].uc_modes = UCMODE_OP;
 737                         }
 738                         else
 739                         {
 740                                 user->chans[index].uc_modes = 0;
 741                         }
 742                         user->chans[index].channel = Ptr;
 743                         Ptr->AddUser((char*)user);
 744                         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 745
 746                         log(DEBUG,"Sent JOIN to client");
 747
 748                         if (Ptr->topicset)
 749                         {
 750                                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 751                                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 752                         }
 753                         userlist(user,Ptr);
 754                         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 755                         //WriteServ(user->fd,"324 %s %s +%s",user->nick, Ptr->name,chanmodes(Ptr));
 756                         //WriteServ(user->fd,"329 %s %s %lu", user->nick, Ptr->name, (unsigned long)Ptr->created);
 757                         FOREACH_MOD OnUserJoin(user,Ptr);
 758                         return Ptr;
 759                 }
 760         }
 761         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 762         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 763         return NULL;
 764 }
 765
 766 /* remove a channel from a users record, and remove the record from memory
 767  * if the channel has become empty */
 768
 769 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 770 {
 771         if ((!user) || (!cname))
 772         {
 773                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 774                 return NULL;
 775         }
 776
 777         chanrec* Ptr;
 778
 779         if ((!cname) || (!user))
 780         {
 781                 return NULL;
 782         }
 783
 784         Ptr = FindChan(cname);
 785
 786         if (!Ptr)
 787         {
 788                 return NULL;
 789         }
 790
 791         FOREACH_MOD OnUserPart(user,Ptr);
 792         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 793
 794         for (int i =0; i != MAXCHANS; i++)
 795         {
 796                 /* zap it from the channel list of the user */
 797                 if (user->chans[i].channel == Ptr)
 798                 {
 799                         if (reason)
 800                         {
 801                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 802                         }
 803                         else
 804                         {
 805                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 806                         }
 807                         user->chans[i].uc_modes = 0;
 808                         user->chans[i].channel = NULL;
 809                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 810                         break;
 811                 }
 812         }
 813
 814         Ptr->DelUser((char*)user);
 815
 816         /* if there are no users left on the channel */
 817         if (!usercount(Ptr))
 818         {
 819                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 820
 821                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 822
 823                 /* kill the record */
 824                 if (iter != chanlist.end())
 825                 {
 826                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 827                         delete Ptr;
 828                         chanlist.erase(iter);
 829                 }
 830         }
 831
 832         return NULL;
 833 }
 834
 835
 836 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 837 {
 838         if ((!src) || (!user) || (!Ptr) || (!reason))
 839         {
 840                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 841                 return;
 842         }
 843
 844         if ((!Ptr) || (!user) || (!src))
 845         {
 846                 return;
 847         }
 848
 849         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 850
 851         if (!has_channel(user,Ptr))
 852         {
 853                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 854                 return;
 855         }
 856
 857         int MOD_RESULT = 0;
 858         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 859         if (MOD_RESULT == ACR_DENY)
 860                 return;
 861
 862         if (MOD_RESULT == ACR_DEFAULT)
 863         {
 864                 if (((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr))) && (!is_uline(src->server)))
 865                 {
 866                         if (cstatus(src,Ptr) == STATUS_HOP)
 867                         {
 868                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 869                         }
 870                         else
 871                         {
 872                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 873                         }
 874
 875                         return;
 876                 }
 877         }
 878
 879         MOD_RESULT = 0;
 880         FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 881         if (MOD_RESULT)
 882                 return;
 883
 884         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 885
 886         for (int i =0; i != MAXCHANS; i++)
 887         {
 888                 /* zap it from the channel list of the user */
 889                 if (user->chans[i].channel)
 890                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 891                 {
 892                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 893                         user->chans[i].uc_modes = 0;
 894                         user->chans[i].channel = NULL;
 895                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 896                         break;
 897                 }
 898         }
 899
 900         Ptr->DelUser((char*)user);
 901
 902         /* if there are no users left on the channel */
 903         if (!usercount(Ptr))
 904         {
 905                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 906
 907                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 908
 909                 /* kill the record */
 910                 if (iter != chanlist.end())
 911                 {
 912                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 913                         delete Ptr;
 914                         chanlist.erase(iter);
 915                 }
 916         }
 917 }
 918
 919
 920
 921
 922 /* This function pokes and hacks at a parameter list like the following:
 923  *
 924  * PART #winbot,#darkgalaxy :m00!
 925  *
 926  * to turn it into a series of individual calls like this:
 927  *
 928  * PART #winbot :m00!
 929  * PART #darkgalaxy :m00!
 930  *
 931  * The seperate calls are sent to a callback function provided by the caller
 932  * (the caller will usually call itself recursively). The callback function
 933  * must be a command handler. Calling this function on a line with no list causes
 934  * no action to be taken. You must provide a starting and ending parameter number
 935  * where the range of the list can be found, useful if you have a terminating
 936  * parameter as above which is actually not part of the list, or parameters
 937  * before the actual list as well. This code is used by many functions which
 938  * can function as "one to list" (see the RFC) */
 939
 940 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 941 {
 942         char plist[MAXBUF];
 943         char *param;
 944         char *pars[32];
 945         char blog[32][MAXBUF];
 946         char blog2[32][MAXBUF];
 947         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 948         char keystr[MAXBUF];
 949         char moo[MAXBUF];
 950
 951         for (int i = 0; i <32; i++)
 952                 strcpy(blog[i],"");
 953
 954         for (int i = 0; i <32; i++)
 955                 strcpy(blog2[i],"");
 956
 957         strcpy(moo,"");
 958         for (int i = 0; i <10; i++)
 959         {
 960                 if (!parameters[i])
 961                 {
 962                         parameters[i] = moo;
 963                 }
 964         }
 965         if (joins)
 966         {
 967                 if (pcnt > 1) /* we have a key to copy */
 968                 {
 969                         strlcpy(keystr,parameters[1],MAXBUF);
 970                 }
 971         }
 972
 973         if (!parameters[start])
 974         {
 975                 return 0;
 976         }
 977         if (!strchr(parameters[start],','))
 978         {
 979                 return 0;
 980         }
 981         strcpy(plist,"");
 982         for (int i = start; i <= end; i++)
 983         {
 984                 if (parameters[i])
 985                 {
 986                         strlcat(plist,parameters[i],MAXBUF);
 987                 }
 988         }
 989
 990         j = 0;
 991         param = plist;
 992
 993         t = strlen(plist);
 994         for (int i = 0; i < t; i++)
 995         {
 996                 if (plist[i] == ',')
 997                 {
 998                         plist[i] = '\0';
 999                         strlcpy(blog[j++],param,MAXBUF);
1000                         param = plist+i+1;
1001                         if (j>20)
1002                         {
1003                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
1004                                 return 1;
1005                         }
1006                 }
1007         }
1008         strlcpy(blog[j++],param,MAXBUF);
1009         total = j;
1010
1011         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
1012         {
1013                 strcat(keystr,",");
1014         }
1015
1016         if ((joins) && (keystr))
1017         {
1018                 if (strchr(keystr,','))
1019                 {
1020                         j = 0;
1021                         param = keystr;
1022                         t2 = strlen(keystr);
1023                         for (int i = 0; i < t2; i++)
1024                         {
1025                                 if (keystr[i] == ',')
1026                                 {
1027                                         keystr[i] = '\0';
1028                                         strlcpy(blog2[j++],param,MAXBUF);
1029                                         param = keystr+i+1;
1030                                 }
1031                         }
1032                         strlcpy(blog2[j++],param,MAXBUF);
1033                         total2 = j;
1034                 }
1035         }
1036
1037         for (j = 0; j < total; j++)
1038         {
1039                 if (blog[j])
1040                 {
1041                         pars[0] = blog[j];
1042                 }
1043                 for (q = end; q < pcnt-1; q++)
1044                 {
1045                         if (parameters[q+1])
1046                         {
1047                                 pars[q-end+1] = parameters[q+1];
1048                         }
1049                 }
1050                 if ((joins) && (parameters[1]))
1051                 {
1052                         if (pcnt > 1)
1053                         {
1054                                 pars[1] = blog2[j];
1055                         }
1056                         else
1057                         {
1058                                 pars[1] = NULL;
1059                         }
1060                 }
1061                 /* repeatedly call the function with the hacked parameter list */
1062                 if ((joins) && (pcnt > 1))
1063                 {
1064                         if (pars[1])
1065                         {
1066                                 // pars[1] already set up and containing key from blog2[j]
1067                                 fn(pars,2,u);
1068                         }
1069                         else
1070                         {
1071                                 pars[1] = parameters[1];
1072                                 fn(pars,2,u);
1073                         }
1074                 }
1075                 else
1076                 {
1077                         fn(pars,pcnt-(end-start),u);
1078                 }
1079         }
1080
1081         return 1;
1082 }
1083
1084
1085
1086 void kill_link(userrec *user,const char* r)
1087 {
1088         user_hash::iterator iter = clientlist.find(user->nick);
1089
1090         char reason[MAXBUF];
1091
1092         strncpy(reason,r,MAXBUF);
1093
1094         if (strlen(reason)>MAXQUIT)
1095         {
1096                 reason[MAXQUIT-1] = '\0';
1097         }
1098
1099         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1100         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1101         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1102
1103         if (user->registered == 7) {
1104                 FOREACH_MOD OnUserQuit(user,reason);
1105                 WriteCommonExcept(user,"QUIT :%s",reason);
1106         }
1107
1108         user->FlushWriteBuf();
1109
1110         FOREACH_MOD OnUserDisconnect(user);
1111
1112         if (user->fd > -1)
1113         {
1114                 FOREACH_MOD OnRawSocketClose(user->fd);
1115                 engine_delete_fd;
1116                 user->CloseSocket();
1117         }
1118
1119         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
1120         // if they were an oper with +s.
1121         if (user->registered == 7) {
1122                 purge_empty_chans(user);
1123                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
1124                 if (!strcmp(user->server,ServerName))
1125                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
1126                 AddWhoWas(user);
1127         }
1128
1129         if (iter != clientlist.end())
1130         {
1131                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1132                 if (user->fd > -1)
1133                         fd_ref_table[user->fd] = NULL;
1134                 clientlist.erase(iter);
1135         }
1136         delete user;
1137 }
1138
1139 void kill_link_silent(userrec *user,const char* r)
1140 {
1141         user_hash::iterator iter = clientlist.find(user->nick);
1142
1143         char reason[MAXBUF];
1144
1145         strncpy(reason,r,MAXBUF);
1146
1147         if (strlen(reason)>MAXQUIT)
1148         {
1149                 reason[MAXQUIT-1] = '\0';
1150         }
1151
1152         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1153         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1154         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1155
1156         user->FlushWriteBuf();
1157
1158         if (user->registered == 7) {
1159                 FOREACH_MOD OnUserQuit(user,reason);
1160                 WriteCommonExcept(user,"QUIT :%s",reason);
1161         }
1162
1163         FOREACH_MOD OnUserDisconnect(user);
1164
1165         if (user->fd > -1)
1166         {
1167                 FOREACH_MOD OnRawSocketClose(user->fd);
1168                 engine_delete_fd;
1169                 user->CloseSocket();
1170         }
1171
1172         if (user->registered == 7) {
1173                 purge_empty_chans(user);
1174         }
1175
1176         if (iter != clientlist.end())
1177         {
1178                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1179                 if (user->fd > -1)
1180                         fd_ref_table[user->fd] = NULL;
1181                 clientlist.erase(iter);
1182         }
1183         delete user;
1184 }
1185
1186
1187 /*void *task(void *arg)
1188 {
1189         for (;;) {
1190                 cout << (char *)arg;
1191                 cout.flush();
1192         }
1193         return NULL;
1194 }*/
1195
1196 int main(int argc, char** argv)
1197 {
1198         Start();
1199         srand(time(NULL));
1200         log(DEBUG,"*** InspIRCd starting up!");
1201         if (!FileExists(CONFIG_FILE))
1202         {
1203                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
1204                 log(DEFAULT,"main: no config");
1205                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
1206                 Exit(ERROR);
1207         }
1208         if (argc > 1) {
1209                 for (int i = 1; i < argc; i++)
1210                 {
1211                         if (!strcmp(argv[i],"-nofork")) {
1212                                 nofork = true;
1213                         }
1214                         if (!strcmp(argv[i],"-wait")) {
1215                                 sleep(6);
1216                         }
1217                         if (!strcmp(argv[i],"-nolimit")) {
1218                                 unlimitcore = true;
1219                         }
1220                 }
1221         }
1222
1223         strlcpy(MyExecutable,argv[0],MAXBUF);
1224
1225         // initialize the lowercase mapping table
1226         for (unsigned int cn = 0; cn < 256; cn++)
1227                 lowermap[cn] = cn;
1228         // lowercase the uppercase chars
1229         for (unsigned int cn = 65; cn < 91; cn++)
1230                 lowermap[cn] = tolower(cn);
1231         // now replace the specific chars for scandanavian comparison
1232         lowermap[(unsigned)'['] = '{';
1233         lowermap[(unsigned)']'] = '}';
1234         lowermap[(unsigned)'\\'] = '|';
1235
1236         if (InspIRCd(argv,argc) == ERROR)
1237         {
1238                 log(DEFAULT,"main: daemon function bailed");
1239                 printf("ERROR: could not initialise. Shutting down.\n");
1240                 Exit(ERROR);
1241         }
1242         Exit(TRUE);
1243         return 0;
1244 }
1245
1246 template<typename T> inline string ConvToStr(const T &in)
1247 {
1248         stringstream tmp;
1249         if (!(tmp << in)) return string();
1250         return tmp.str();
1251 }
1252
1253 /* re-allocates a nick in the user_hash after they change nicknames,
1254  * returns a pointer to the new user as it may have moved */
1255
1256 userrec* ReHashNick(char* Old, char* New)
1257 {
1258         //user_hash::iterator newnick;
1259         user_hash::iterator oldnick = clientlist.find(Old);
1260
1261         log(DEBUG,"ReHashNick: %s %s",Old,New);
1262
1263         if (!strcasecmp(Old,New))
1264         {
1265                 log(DEBUG,"old nick is new nick, skipping");
1266                 return oldnick->second;
1267         }
1268
1269         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
1270
1271         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1272
1273         userrec* olduser = oldnick->second;
1274         clientlist[New] = olduser;
1275         clientlist.erase(oldnick);
1276
1277         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1278
1279         return clientlist[New];
1280 }
1281
1282 /* adds or updates an entry in the whowas list */
1283 void AddWhoWas(userrec* u)
1284 {
1285         whowas_hash::iterator iter = whowas.find(u->nick);
1286         WhoWasUser *a = new WhoWasUser();
1287         strlcpy(a->nick,u->nick,NICKMAX);
1288         strlcpy(a->ident,u->ident,IDENTMAX);
1289         strlcpy(a->dhost,u->dhost,160);
1290         strlcpy(a->host,u->host,160);
1291         strlcpy(a->fullname,u->fullname,MAXGECOS);
1292         strlcpy(a->server,u->server,256);
1293         a->signon = u->signon;
1294
1295         /* MAX_WHOWAS:   max number of /WHOWAS items
1296          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
1297          *               can be replaced by a newer one
1298          */
1299
1300         if (iter == whowas.end())
1301         {
1302                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
1303                 {
1304                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
1305                         {
1306                                 // 3600 seconds in an hour ;)
1307                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
1308                                 {
1309                                         // delete the old one
1310                                         if (i->second) delete i->second;
1311                                         // replace with new one
1312                                         i->second = a;
1313                                         log(DEBUG,"added WHOWAS entry, purged an old record");
1314                                         return;
1315                                 }
1316                         }
1317                         // no space left and user doesnt exist. Don't leave ram in use!
1318                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
1319                         delete a;
1320                 }
1321                 else
1322                 {
1323                         log(DEBUG,"added fresh WHOWAS entry");
1324                         whowas[a->nick] = a;
1325                 }
1326         }
1327         else
1328         {
1329                 log(DEBUG,"updated WHOWAS entry");
1330                 if (iter->second) delete iter->second;
1331                 iter->second = a;
1332         }
1333 }
1334
1335 #ifdef THREADED_DNS
1336 void* dns_task(void* arg)
1337 {
1338         userrec* u = (userrec*)arg;
1339         log(DEBUG,"DNS thread for user %s",u->nick);
1340         DNS dns1;
1341         DNS dns2;
1342         std::string host;
1343         std::string ip;
1344         if (dns1.ReverseLookup(u->ip))
1345         {
1346                 log(DEBUG,"DNS Step 1");
1347                 while (!dns1.HasResult())
1348                 {
1349                         usleep(100);
1350                 }
1351                 host = dns1.GetResult();
1352                 if (host != "")
1353                 {
1354                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
1355                         if (dns2.ForwardLookup(host))
1356                         {
1357                                 while (!dns2.HasResult())
1358                                 {
1359                                         usleep(100);
1360                                 }
1361                                 ip = dns2.GetResultIP();
1362                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
1363                                 if (ip == std::string(u->ip))
1364                                 {
1365                                         log(DEBUG,"DNS Step 4");
1366                                         if (host.length() < 160)
1367                                         {
1368                                                 log(DEBUG,"DNS Step 5");
1369                                                 strcpy(u->host,host.c_str());
1370                                         }
1371                                 }
1372                         }
1373                 }
1374         }
1375         u->dns_done = true;
1376         return NULL;
1377 }
1378 #endif
1379
1380 /* add a client connection to the sockets list */
1381 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
1382 {
1383         string tempnick;
1384         char tn2[MAXBUF];
1385         user_hash::iterator iter;
1386
1387         tempnick = ConvToStr(socket) + "-unknown";
1388         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
1389
1390         iter = clientlist.find(tempnick);
1391
1392         // fix by brain.
1393         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
1394         // using one as a registered connection. As theyre per fd, we can also safely assume
1395         // that we wont have collisions. Therefore, if the nick exists in the list, its only
1396         // used by a dead socket, erase the iterator so that the new client may reclaim it.
1397         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
1398         // issue in earlier alphas/betas
1399         if (iter != clientlist.end())
1400         {
1401                 userrec* goner = iter->second;
1402                 delete goner;
1403                 clientlist.erase(iter);
1404         }
1405
1406         /*
1407          * It is OK to access the value here this way since we know
1408          * it exists, we just created it above.
1409          *
1410          * At NO other time should you access a value in a map or a
1411          * hash_map this way.
1412          */
1413         clientlist[tempnick] = new userrec();
1414
1415         NonBlocking(socket);
1416         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
1417
1418         clientlist[tempnick]->fd = socket;
1419         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
1420         strlcpy(clientlist[tempnick]->host, host,160);
1421         strlcpy(clientlist[tempnick]->dhost, host,160);
1422         clientlist[tempnick]->server = (char*)FindServerNamePtr(ServerName);
1423         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
1424         clientlist[tempnick]->registered = 0;
1425         clientlist[tempnick]->signon = TIME+dns_timeout;
1426         clientlist[tempnick]->lastping = 1;
1427         clientlist[tempnick]->port = port;
1428         strlcpy(clientlist[tempnick]->ip,ip,16);
1429
1430         // set the registration timeout for this user
1431         unsigned long class_regtimeout = 90;
1432         int class_flood = 0;
1433         long class_threshold = 5;
1434         long class_sqmax = 262144;      // 256kb
1435         long class_rqmax = 4096;        // 4k
1436
1437         for (ClassVector::iterator i = Classes.begin(); i != Classes.end(); i++)
1438         {
1439                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
1440                 {
1441                         class_regtimeout = (unsigned long)i->registration_timeout;
1442                         class_flood = i->flood;
1443                         clientlist[tempnick]->pingmax = i->pingtime;
1444                         class_threshold = i->threshold;
1445                         class_sqmax = i->sendqmax;
1446                         class_rqmax = i->recvqmax;
1447                         break;
1448                 }
1449         }
1450
1451         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax+dns_timeout;
1452         clientlist[tempnick]->timeout = TIME+class_regtimeout;
1453         clientlist[tempnick]->flood = class_flood;
1454         clientlist[tempnick]->threshold = class_threshold;
1455         clientlist[tempnick]->sendqmax = class_sqmax;
1456         clientlist[tempnick]->recvqmax = class_rqmax;
1457
1458         for (int i = 0; i < MAXCHANS; i++)
1459         {
1460                 clientlist[tempnick]->chans[i].channel = NULL;
1461                 clientlist[tempnick]->chans[i].uc_modes = 0;
1462         }
1463
1464         if (clientlist.size() > SoftLimit)
1465         {
1466                 kill_link(clientlist[tempnick],"No more connections allowed");
1467                 return;
1468         }
1469
1470         if (clientlist.size() >= MAXCLIENTS)
1471         {
1472                 kill_link(clientlist[tempnick],"No more connections allowed");
1473                 return;
1474         }
1475
1476         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
1477         // its a pretty big but for the moment valid assumption:
1478         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
1479         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
1480         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
1481         // which for the time being is a physical impossibility (even the largest networks dont have more
1482         // than about 10,000 users on ONE server!)
1483         if ((unsigned)socket > 65534)
1484         {
1485                 kill_link(clientlist[tempnick],"Server is full");
1486                 return;
1487         }
1488
1489
1490         char* e = matches_exception(ip);
1491         if (!e)
1492         {
1493                 char* r = matches_zline(ip);
1494                 if (r)
1495                 {
1496                         char reason[MAXBUF];
1497                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
1498                         kill_link(clientlist[tempnick],reason);
1499                         return;
1500                 }
1501         }
1502         fd_ref_table[socket] = clientlist[tempnick];
1503         engine_add_fd;
1504
1505         // initialize their dns lookup thread
1506         //if (pthread_create(&clientlist[tempnick]->dnsthread, NULL, dns_task, (void *)clientlist[tempnick]) != 0)
1507         //{
1508         //      log(DEBUG,"Failed to create DNS lookup thread for user %s",clientlist[tempnick]->nick);
1509         //}
1510 }
1511
1512 /* shows the message of the day, and any other on-logon stuff */
1513 void FullConnectUser(userrec* user)
1514 {
1515         statsConnects++;
1516         user->idle_lastmsg = TIME;
1517         log(DEBUG,"ConnectUser: %s",user->nick);
1518
1519         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
1520         {
1521                 kill_link(user,"Invalid password");
1522                 return;
1523         }
1524         if (IsDenied(user))
1525         {
1526                 kill_link(user,"Unauthorised connection");
1527                 return;
1528         }
1529
1530         char match_against[MAXBUF];
1531         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
1532         char* e = matches_exception(match_against);
1533         if (!e)
1534         {
1535                 char* r = matches_gline(match_against);
1536                 if (r)
1537                 {
1538                         char reason[MAXBUF];
1539                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1540                         kill_link_silent(user,reason);
1541                         return;
1542                 }
1543                 r = matches_kline(user->host);
1544                 if (r)
1545                 {
1546                         char reason[MAXBUF];
1547                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1548                         kill_link_silent(user,reason);
1549                         return;
1550                 }
1551         }
1552
1553         // fix by brain: move this below the xline checks to prevent spurious quits going onto the net that dont belong
1554         user->registered = 7;
1555
1556         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Network);
1557         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Network,user->nick,user->ident,user->host);
1558         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,ServerName,VERSION);
1559         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
1560         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,ServerName,VERSION);
1561         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
1562         std::stringstream v;
1563         v << "MESHED WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
1564         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
1565         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
1566         v << Network;
1567         std::string data005 = v.str();
1568         FOREACH_MOD On005Numeric(data005);
1569         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1570         // so i'd better split it :)
1571         std::stringstream out(data005);
1572         std::string token = "";
1573         std::string line5 = "";
1574         int token_counter = 0;
1575         while (!out.eof())
1576         {
1577                 out >> token;
1578                 line5 = line5 + token + " ";
1579                 token_counter++;
1580                 if ((token_counter >= 13) || (out.eof() == true))
1581                 {
1582                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1583                         line5 = "";
1584                         token_counter = 0;
1585                 }
1586         }
1587         ShowMOTD(user);
1588
1589         // fix by brain: these should be AFTER the N token, so other servers know what the HELL we're on about... :)
1590         FOREACH_MOD OnUserConnect(user);
1591         FOREACH_MOD OnGlobalConnect(user);
1592         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
1593 }
1594
1595
1596 /* shows the message of the day, and any other on-logon stuff */
1597 void ConnectUser(userrec *user)
1598 {
1599         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
1600         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
1601         {
1602                 FullConnectUser(user);
1603         }
1604 }
1605
1606 std::string GetVersionString()
1607 {
1608         char Revision[] = "$Revision$";
1609         char versiondata[MAXBUF];
1610         char *s1 = Revision;
1611         char *savept;
1612         char *v2 = strtok_r(s1," ",&savept);
1613         s1 = savept;
1614         v2 = strtok_r(s1," ",&savept);
1615         s1 = savept;
1616         char socketengine[] = engine_name;
1617 #ifdef THREADED_DNS
1618         char dnsengine[] = "multithread";
1619 #else
1620         char dnsengine[] = "singlethread";
1621 #endif
1622         snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,v2,ServerName,SYSTEM,(unsigned long)OPTIMISATION,socketengine,dnsengine);
1623         return versiondata;
1624 }
1625
1626 void handle_version(char **parameters, int pcnt, userrec *user)
1627 {
1628         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
1629 }
1630
1631
1632 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
1633 {
1634         for (unsigned int i = 0; i < cmdlist.size(); i++)
1635         {
1636                 if (!strcasecmp(cmdlist[i].command,commandname))
1637                 {
1638                         if (cmdlist[i].handler_function)
1639                         {
1640                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
1641                                 {
1642                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1643                                         {
1644                                                 if (cmdlist[i].flags_needed)
1645                                                 {
1646                                                         if (user->HasPermission((char*)commandname))
1647                                                         {
1648                                                                 return true;
1649                                                         }
1650                                                         else
1651                                                         {
1652                                                                 return false;
1653                                                         }
1654                                                 }
1655                                                 return true;
1656                                         }
1657                                 }
1658                         }
1659                 }
1660         }
1661         return false;
1662 }
1663
1664 // calls a handler function for a command
1665
1666 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
1667 {
1668         for (unsigned int i = 0; i < cmdlist.size(); i++)
1669         {
1670                 if (!strcasecmp(cmdlist[i].command,commandname))
1671                 {
1672                         if (cmdlist[i].handler_function)
1673                         {
1674                                 if (pcnt>=cmdlist[i].min_params)
1675                                 {
1676                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1677                                         {
1678                                                 if (cmdlist[i].flags_needed)
1679                                                 {
1680                                                         if (user->HasPermission((char*)commandname))
1681                                                         {
1682                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
1683                                                         }
1684                                                 }
1685                                                 else
1686                                                 {
1687                                                         cmdlist[i].handler_function(parameters,pcnt,user);
1688                                                 }
1689                                         }
1690                                 }
1691                         }
1692                 }
1693         }
1694 }
1695
1696
1697 void force_nickchange(userrec* user,const char* newnick)
1698 {
1699         char nick[MAXBUF];
1700         int MOD_RESULT = 0;
1701
1702         strcpy(nick,"");
1703
1704         FOREACH_RESULT(OnUserPreNick(user,newnick));
1705         if (MOD_RESULT) {
1706                 statsCollisions++;
1707                 kill_link(user,"Nickname collision");
1708                 return;
1709         }
1710         if (matches_qline(newnick))
1711         {
1712                 statsCollisions++;
1713                 kill_link(user,"Nickname collision");
1714                 return;
1715         }
1716
1717         if (user)
1718         {
1719                 if (newnick)
1720                 {
1721                         strncpy(nick,newnick,MAXBUF);
1722                 }
1723                 if (user->registered == 7)
1724                 {
1725                         char* pars[1];
1726                         pars[0] = nick;
1727                         handle_nick(pars,1,user);
1728                 }
1729         }
1730 }
1731
1732
1733 int process_parameters(char **command_p,char *parameters)
1734 {
1735         int j = 0;
1736         int q = strlen(parameters);
1737         if (!q)
1738         {
1739                 /* no parameters, command_p invalid! */
1740                 return 0;
1741         }
1742         if (parameters[0] == ':')
1743         {
1744                 command_p[0] = parameters+1;
1745                 return 1;
1746         }
1747         if (q)
1748         {
1749                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
1750                 {
1751                         /* only one parameter */
1752                         command_p[0] = parameters;
1753                         if (parameters[0] == ':')
1754                         {
1755                                 if (strchr(parameters,' ') != NULL)
1756                                 {
1757                                         command_p[0]++;
1758                                 }
1759                         }
1760                         return 1;
1761                 }
1762         }
1763         command_p[j++] = parameters;
1764         for (int i = 0; i <= q; i++)
1765         {
1766                 if (parameters[i] == ' ')
1767                 {
1768                         command_p[j++] = parameters+i+1;
1769                         parameters[i] = '\0';
1770                         if (command_p[j-1][0] == ':')
1771                         {
1772                                 *command_p[j-1]++; /* remove dodgy ":" */
1773                                 break;
1774                                 /* parameter like this marks end of the sequence */
1775                         }
1776                 }
1777         }
1778         return j; /* returns total number of items in the list */
1779 }
1780
1781 void process_command(userrec *user, char* cmd)
1782 {
1783         char *parameters;
1784         char *command;
1785         char *command_p[127];
1786         char p[MAXBUF], temp[MAXBUF];
1787         int j, items, cmd_found;
1788
1789         for (int i = 0; i < 127; i++)
1790                 command_p[i] = NULL;
1791
1792         if (!user)
1793         {
1794                 return;
1795         }
1796         if (!cmd)
1797         {
1798                 return;
1799         }
1800         if (!cmd[0])
1801         {
1802                 return;
1803         }
1804
1805         int total_params = 0;
1806         if (strlen(cmd)>2)
1807         {
1808                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1809                 {
1810                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1811                         {
1812                                 total_params++;
1813                                 // found a 'trailing', we dont count them after this.
1814                                 break;
1815                         }
1816                         if (cmd[q] == ' ')
1817                                 total_params++;
1818                 }
1819         }
1820
1821         // another phidjit bug...
1822         if (total_params > 126)
1823         {
1824                 *(strchr(cmd,' ')) = '\0';
1825                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1826                 return;
1827         }
1828
1829         strlcpy(temp,cmd,MAXBUF);
1830
1831         std::string tmp = cmd;
1832         for (int i = 0; i <= MODCOUNT; i++)
1833         {
1834                 std::string oldtmp = tmp;
1835                 modules[i]->OnServerRaw(tmp,true,user);
1836                 if (oldtmp != tmp)
1837                 {
1838                         log(DEBUG,"A Module changed the input string!");
1839                         log(DEBUG,"New string: %s",tmp.c_str());
1840                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1841                         break;
1842                 }
1843         }
1844         strlcpy(cmd,tmp.c_str(),MAXBUF);
1845         strlcpy(temp,cmd,MAXBUF);
1846
1847         if (!strchr(cmd,' '))
1848         {
1849                 /* no parameters, lets skip the formalities and not chop up
1850                  * the string */
1851                 log(DEBUG,"About to preprocess command with no params");
1852                 items = 0;
1853                 command_p[0] = NULL;
1854                 parameters = NULL;
1855                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1856                 {
1857                         cmd[i] = toupper(cmd[i]);
1858                 }
1859                 command = cmd;
1860         }
1861         else
1862         {
1863                 strcpy(cmd,"");
1864                 j = 0;
1865                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1866                 for (unsigned int i = 0; i < strlen(temp); i++)
1867                 {
1868                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1869                         {
1870                                 cmd[j++] = temp[i];
1871                                 cmd[j] = 0;
1872                         }
1873                 }
1874                 /* split the full string into a command plus parameters */
1875                 parameters = p;
1876                 strcpy(p," ");
1877                 command = cmd;
1878                 if (strchr(cmd,' '))
1879                 {
1880                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1881                         {
1882                                 /* capitalise the command ONLY, leave params intact */
1883                                 cmd[i] = toupper(cmd[i]);
1884                                 /* are we nearly there yet?! :P */
1885                                 if (cmd[i] == ' ')
1886                                 {
1887                                         command = cmd;
1888                                         parameters = cmd+i+1;
1889                                         cmd[i] = '\0';
1890                                         break;
1891                                 }
1892                         }
1893                 }
1894                 else
1895                 {
1896                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1897                         {
1898                                 cmd[i] = toupper(cmd[i]);
1899                         }
1900                 }
1901
1902         }
1903         cmd_found = 0;
1904
1905         if (strlen(command)>MAXCOMMAND)
1906         {
1907                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1908                 return;
1909         }
1910
1911         for (unsigned int x = 0; x < strlen(command); x++)
1912         {
1913                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1914                 {
1915                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1916                         {
1917                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1918                                 {
1919                                         statsUnknown++;
1920                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1921                                         return;
1922                                 }
1923                         }
1924                 }
1925         }
1926
1927         for (unsigned int i = 0; i != cmdlist.size(); i++)
1928         {
1929                 if (cmdlist[i].command[0])
1930                 {
1931                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1932                         {
1933                                 if (parameters)
1934                                 {
1935                                         if (parameters[0])
1936                                         {
1937                                                 items = process_parameters(command_p,parameters);
1938                                         }
1939                                         else
1940                                         {
1941                                                 items = 0;
1942                                                 command_p[0] = NULL;
1943                                         }
1944                                 }
1945                                 else
1946                                 {
1947                                         items = 0;
1948                                         command_p[0] = NULL;
1949                                 }
1950
1951                                 if (user)
1952                                 {
1953                                         /* activity resets the ping pending timer */
1954                                         user->nping = TIME + user->pingmax;
1955                                         if ((items) < cmdlist[i].min_params)
1956                                         {
1957                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1958                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1959                                                 return;
1960                                         }
1961                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1962                                         {
1963                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1964                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1965                                                 cmd_found = 1;
1966                                                 return;
1967                                         }
1968                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1969                                         {
1970                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1971                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1972                                                 cmd_found = 1;
1973                                                 return;
1974                                         }
1975                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1976                                          * deny command! */
1977                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1978                                         {
1979                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1980                                                 {
1981                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1982                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1983                                                         return;
1984                                                 }
1985                                         }
1986                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1987                                         {
1988                                                 std::stringstream dcmds(DisabledCommands);
1989                                                 while (!dcmds.eof())
1990                                                 {
1991                                                         std::string thiscmd;
1992                                                         dcmds >> thiscmd;
1993                                                         if (!strcasecmp(thiscmd.c_str(),command))
1994                                                         {
1995                                                                 // command is disabled!
1996                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1997                                                                 return;
1998                                                         }
1999                                                 }
2000                                         }
2001                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
2002                                         {
2003                                                 if (cmdlist[i].handler_function)
2004                                                 {
2005
2006                                                         /* ikky /stats counters */
2007                                                         if (temp)
2008                                                         {
2009                                                                 cmdlist[i].use_count++;
2010                                                                 cmdlist[i].total_bytes+=strlen(temp);
2011                                                         }
2012
2013                                                         int MOD_RESULT = 0;
2014                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
2015                                                         if (MOD_RESULT == 1) {
2016                                                                 return;
2017                                                         }
2018
2019                                                         /* WARNING: nothing may come after the
2020                                                          * command handler call, as the handler
2021                                                          * may free the user structure! */
2022
2023                                                         cmdlist[i].handler_function(command_p,items,user);
2024                                                 }
2025                                                 return;
2026                                         }
2027                                         else
2028                                         {
2029                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
2030                                                 return;
2031                                         }
2032                                 }
2033                                 cmd_found = 1;
2034                         }
2035                 }
2036         }
2037         if ((!cmd_found) && (user))
2038         {
2039                 statsUnknown++;
2040                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
2041         }
2042 }
2043
2044 bool removecommands(const char* source)
2045 {
2046         bool go_again = true;
2047         while (go_again)
2048         {
2049                 go_again = false;
2050                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
2051                 {
2052                         if (!strcmp(i->source,source))
2053                         {
2054                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
2055                                 cmdlist.erase(i);
2056                                 go_again = true;
2057                                 break;
2058                         }
2059                 }
2060         }
2061         return true;
2062 }
2063
2064
2065 void process_buffer(const char* cmdbuf,userrec *user)
2066 {
2067         if (!user)
2068         {
2069                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2070                 return;
2071         }
2072         char cmd[MAXBUF];
2073         if (!cmdbuf)
2074         {
2075                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2076                 return;
2077         }
2078         if (!cmdbuf[0])
2079         {
2080                 return;
2081         }
2082         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
2083
2084         strlcpy(cmd,cmdbuf,MAXBUF);
2085         if (!cmd[0])
2086         {
2087                 return;
2088         }
2089         int sl = strlen(cmd)-1;
2090         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2091         {
2092                 cmd[sl] = '\0';
2093         }
2094         sl = strlen(cmd)-1;
2095         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2096         {
2097                 cmd[sl] = '\0';
2098         }
2099         sl = strlen(cmd)-1;
2100         while (cmd[sl] == ' ') // strip trailing spaces
2101         {
2102                 cmd[sl] = '\0';
2103                 sl = strlen(cmd)-1;
2104         }
2105
2106         if (!cmd[0])
2107         {
2108                 return;
2109         }
2110         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
2111         tidystring(cmd);
2112         if ((user) && (cmd))
2113         {
2114                 process_command(user,cmd);
2115         }
2116 }
2117
2118 char MODERR[MAXBUF];
2119
2120 char* ModuleError()
2121 {
2122         return MODERR;
2123 }
2124
2125 void erase_factory(int j)
2126 {
2127         int v = 0;
2128         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
2129         {
2130                 if (v == j)
2131                 {
2132                         factory.erase(t);
2133                         factory.push_back(NULL);
2134                         return;
2135                 }
2136                 v++;
2137         }
2138 }
2139
2140 void erase_module(int j)
2141 {
2142         int v1 = 0;
2143         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
2144         {
2145                 if (v1 == j)
2146                 {
2147                         delete *m;
2148                         modules.erase(m);
2149                         modules.push_back(NULL);
2150                         break;
2151                 }
2152                 v1++;
2153         }
2154         int v2 = 0;
2155         for (std::vector<std::string>::iterator v = module_names.begin(); v != module_names.end(); v++)
2156         {
2157                 if (v2 == j)
2158                 {
2159                        module_names.erase(v);
2160                        break;
2161                 }
2162                 v2++;
2163         }
2164
2165 }
2166
2167 bool UnloadModule(const char* filename)
2168 {
2169         std::string filename_str = filename;
2170         for (unsigned int j = 0; j != module_names.size(); j++)
2171         {
2172                 if (module_names[j] == filename_str)
2173                 {
2174                         if (modules[j]->GetVersion().Flags & VF_STATIC)
2175                         {
2176                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
2177                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
2178                                 return false;
2179                         }
2180                         FOREACH_MOD OnUnloadModule(modules[j],module_names[j]);
2181                         // found the module
2182                         log(DEBUG,"Deleting module...");
2183                         erase_module(j);
2184                         log(DEBUG,"Erasing module entry...");
2185                         erase_factory(j);
2186                         log(DEBUG,"Removing dependent commands...");
2187                         removecommands(filename);
2188                         log(DEFAULT,"Module %s unloaded",filename);
2189                         MODCOUNT--;
2190                         return true;
2191                 }
2192         }
2193         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
2194         snprintf(MODERR,MAXBUF,"Module not loaded");
2195         return false;
2196 }
2197
2198 bool LoadModule(const char* filename)
2199 {
2200         char modfile[MAXBUF];
2201 #ifdef STATIC_LINK
2202         snprintf(modfile,MAXBUF,"%s",filename);
2203 #else
2204         snprintf(modfile,MAXBUF,"%s/%s",ModPath,filename);
2205 #endif
2206         std::string filename_str = filename;
2207 #ifndef STATIC_LINK
2208         if (!DirValid(modfile))
2209         {
2210                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
2211                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
2212                 return false;
2213         }
2214 #endif
2215         log(DEBUG,"Loading module: %s",modfile);
2216 #ifndef STATIC_LINK
2217         if (FileExists(modfile))
2218         {
2219 #endif
2220                 for (unsigned int j = 0; j < module_names.size(); j++)
2221                 {
2222                         if (module_names[j] == filename_str)
2223                         {
2224                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
2225                                 snprintf(MODERR,MAXBUF,"Module already loaded");
2226                                 return false;
2227                         }
2228                 }
2229                 ircd_module* a = new ircd_module(modfile);
2230                 factory[MODCOUNT+1] = a;
2231                 if (factory[MODCOUNT+1]->LastError())
2232                 {
2233                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
2234                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
2235                         MODCOUNT--;
2236                         return false;
2237                 }
2238                 if (factory[MODCOUNT+1]->factory)
2239                 {
2240                         Module* m = factory[MODCOUNT+1]->factory->CreateModule();
2241                         modules[MODCOUNT+1] = m;
2242                         /* save the module and the module's classfactory, if
2243                          * this isnt done, random crashes can occur :/ */
2244                         module_names.push_back(filename);
2245                 }
2246                 else
2247                 {
2248                         log(DEFAULT,"Unable to load %s",modfile);
2249                         snprintf(MODERR,MAXBUF,"Factory function failed!");
2250                         return false;
2251                 }
2252 #ifndef STATIC_LINK
2253         }
2254         else
2255         {
2256                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
2257                 snprintf(MODERR,MAXBUF,"Module file could not be found");
2258                 return false;
2259         }
2260 #endif
2261         MODCOUNT++;
2262         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
2263         return true;
2264 }
2265
2266
2267 int InspIRCd(char** argv, int argc)
2268 {
2269         struct sockaddr_in client,server;
2270         char addrs[MAXBUF][255];
2271         int incomingSockfd, result = TRUE;
2272         socklen_t length;
2273         int count = 0;
2274 #ifdef USE_SELECT
2275         int selectResult = 0, selectResult2 = 0;
2276         fd_set selectFds;
2277 #endif
2278         char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
2279         timeval tv;
2280
2281         std::string logpath = GetFullProgDir(argv,argc) + "/ircd.log";
2282         log_file = fopen(logpath.c_str(),"a+");
2283         if (!log_file)
2284         {
2285                 printf("ERROR: Could not write to logfile %s, bailing!\n\n",logpath.c_str());
2286                 Exit(ERROR);
2287         }
2288
2289 #ifdef IS_CYGWIN
2290         printf("Logging to ircd.log...\n");
2291 #else
2292         printf("Logging to %s...\n",logpath.c_str());
2293 #endif
2294
2295         log(DEFAULT,"$Id$");
2296         if (geteuid() == 0)
2297         {
2298                 printf("WARNING!!! You are running an irc server as ROOT!!! DO NOT DO THIS!!!\n\n");
2299                 Exit(ERROR);
2300                 log(DEFAULT,"InspIRCd: startup: not starting with UID 0!");
2301         }
2302         SetupCommandTable();
2303         log(DEBUG,"InspIRCd: startup: default command table set up");
2304
2305         ReadConfig(true,NULL);
2306         if (DieValue[0])
2307         {
2308                 printf("WARNING: %s\n\n",DieValue);
2309                 log(DEFAULT,"Ut-Oh, somebody didn't read their config file: '%s'",DieValue);
2310                 exit(0);
2311         }
2312         log(DEBUG,"InspIRCd: startup: read config");
2313
2314         AddServerName(ServerName);
2315
2316         int clientportcount = 0;
2317
2318         for (count = 0; count < ConfValueEnum("bind",&config_f); count++)
2319         {
2320                 ConfValue("bind","port",count,configToken,&config_f);
2321                 ConfValue("bind","address",count,Addr,&config_f);
2322                 ConfValue("bind","type",count,Type,&config_f);
2323                 if (!strcmp(Type,"servers"))
2324                 {
2325                         // modules handle this bind type now.
2326                 }
2327                 else
2328                 {
2329                         ports[clientportcount] = atoi(configToken);
2330                         strlcpy(addrs[clientportcount],Addr,256);
2331                         clientportcount++;
2332                 }
2333                 log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
2334         }
2335         portCount = clientportcount;
2336
2337         log(DEBUG,"InspIRCd: startup: read %lu total client ports",(unsigned long)portCount);
2338         log(DEBUG,"InspIRCd: startup: InspIRCd is now starting!");
2339
2340         printf("\n");
2341
2342         /* BugFix By Craig! :p */
2343         MODCOUNT = -1;
2344         for (count = 0; count < ConfValueEnum("module",&config_f); count++)
2345         {
2346                 ConfValue("module","name",count,configToken,&config_f);
2347                 printf("Loading module... \033[1;32m%s\033[0m\n",configToken);
2348                 if (!LoadModule(configToken))
2349                 {
2350                         log(DEFAULT,"Exiting due to a module loader error.");
2351                         printf("\nThere was an error loading a module: %s\n\nYou might want to do './inspircd start' instead of 'bin/inspircd'\n\n",ModuleError());
2352                         Exit(0);
2353                 }
2354         }
2355         log(DEFAULT,"Total loaded modules: %lu",(unsigned long)MODCOUNT+1);
2356
2357         startup_time = time(NULL);
2358
2359         char PID[MAXBUF];
2360         ConfValue("pid","file",0,PID,&config_f);
2361         // write once here, to try it out and make sure its ok
2362         WritePID(PID);
2363
2364         /* setup select call */
2365 #ifdef USE_SELECT
2366         FD_ZERO(&selectFds);
2367 #endif
2368         log(DEBUG,"InspIRCd: startup: zero selects");
2369         log(VERBOSE,"InspIRCd: startup: portCount = %lu", (unsigned long)portCount);
2370
2371         for (count = 0; count < portCount; count++)
2372         {
2373                 if ((openSockfd[boundPortCount] = OpenTCPSocket()) == ERROR)
2374                 {
2375                         log(DEBUG,"InspIRCd: startup: bad fd %lu",(unsigned long)openSockfd[boundPortCount]);
2376                         return(ERROR);
2377                 }
2378                 if (BindSocket(openSockfd[boundPortCount],client,server,ports[count],addrs[count]) == ERROR)
2379                 {
2380                         log(DEFAULT,"InspIRCd: startup: failed to bind port %lu",(unsigned long)ports[count]);
2381                 }
2382                 else    /* well we at least bound to one socket so we'll continue */
2383                 {
2384                         boundPortCount++;
2385                 }
2386         }
2387
2388         log(DEBUG,"InspIRCd: startup: total bound ports %lu",(unsigned long)boundPortCount);
2389
2390         /* if we didn't bind to anything then abort */
2391         if (boundPortCount == 0)
2392         {
2393                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
2394                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)portCount);
2395                 return (ERROR);
2396         }
2397
2398
2399         printf("\nInspIRCd is now running!\n");
2400
2401         if (nofork)
2402         {
2403                 log(VERBOSE,"Not forking as -nofork was specified");
2404         }
2405         else
2406         {
2407                 if (DaemonSeed() == ERROR)
2408                 {
2409                         log(DEFAULT,"InspIRCd: startup: can't daemonise");
2410                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
2411                         Exit(ERROR);
2412                 }
2413         }
2414
2415         engine_init;
2416         engine_server_fill;
2417
2418         WritePID(PID);
2419
2420         length = sizeof (client);
2421         engine_structs;
2422         timeval tvs;
2423         tvs.tv_usec = 10000L;
2424         tvs.tv_sec = 0;
2425         tv.tv_sec = 0;
2426         tv.tv_usec = 10000L;
2427         char data[65536];
2428         timeval tval;
2429         tval.tv_usec = 10000L;
2430         tval.tv_sec = 0;
2431         int total_in_this_set = 0;
2432         int i = 0, v = 0, j = 0, cycle_iter = 0;
2433         bool expire_run = false;
2434
2435         cycle_iter = i = j = 0;         // stop the compiler whining - these may be marked unused in certain socket engine types
2436
2437         /* main loop, this never returns */
2438         for (;;)
2439         {
2440 #ifdef _POSIX_PRIORITY_SCHEDULING
2441                 sched_yield();
2442 #endif
2443 #ifdef USE_SELECT
2444                 FD_ZERO(&sfd);
2445 #endif
2446                 // we only read time() once per iteration rather than tons of times!
2447                 OLDTIME = TIME;
2448                 TIME = time(NULL);
2449
2450                 dns_poll();
2451
2452                 unsigned int numsockets = module_sockets.size();
2453                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
2454                 {
2455                         InspSocket* s = (InspSocket*)*a;
2456                         if ((s) && (!s->Poll()))
2457                         {
2458                                 log(DEBUG,"Socket poll returned false, close and bail");
2459                                 s->Close();
2460                                 module_sockets.erase(a);
2461                                 delete s;
2462                                 break;
2463                         }
2464                         // we gained a socket, sarper
2465                         if (module_sockets.size() != numsockets) break;
2466                 }
2467
2468                 // *FIX* Instead of closing sockets in kill_link when they receive the ERROR :blah line, we should queue
2469                 // them in a list, then reap the list every second or so.
2470                 if (((TIME % 5) == 0) && (!expire_run))
2471                 {
2472                         expire_lines();
2473                         FOREACH_MOD OnBackgroundTimer(TIME);
2474                         expire_run = true;
2475                         continue;
2476                 }
2477                 if ((TIME % 5) == 1)
2478                         expire_run = false;
2479
2480                 // fix by brain - this must be below any manipulation of the hashmap by modules
2481                 user_hash::iterator count2 = clientlist.begin();
2482
2483
2484                 while (count2 != clientlist.end())
2485                 {
2486 #ifdef USE_SELECT
2487                         FD_ZERO(&sfd);
2488 #endif
2489
2490                         total_in_this_set = 0;
2491
2492                         user_hash::iterator xcount = count2;
2493                         user_hash::iterator endingiter = count2;
2494
2495                         if (count2 == clientlist.end()) break;
2496
2497                         userrec* curr = NULL;
2498
2499                         if (count2->second)
2500                                 curr = count2->second;
2501
2502                         if ((long)curr == -1)
2503                                 goto label;
2504
2505                         if ((curr) && (curr->fd != 0))
2506                         {
2507 #ifdef _POSIX_PRIORITY_SCHEDULING
2508                 sched_yield();
2509 #endif
2510                                 // assemble up to 64 sockets into an fd_set
2511                                 // to implement a pooling mechanism.
2512                                 //
2513                                 // This should be up to 64x faster than the
2514                                 // old implementation.
2515 #ifdef USE_SELECT
2516                                 while (total_in_this_set < 1024)
2517                                 {
2518                                         if (count2 != clientlist.end())
2519                                         {
2520                                                 curr = count2->second;
2521                                                 if ((long)curr == -1)
2522                                                         goto label;
2523                                                 int currfd = curr->fd;
2524                                                 // we don't check the state of remote users.
2525                                                 if ((currfd != -1) && (currfd != FD_MAGIC_NUMBER))
2526                                                 {
2527                                                         curr->FlushWriteBuf();
2528                                                         if (curr->GetWriteError() != "")
2529                                                         {
2530                                                                 log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str());
2531                                                                 kill_link(curr,curr->GetWriteError().c_str());
2532                                                                 goto label;
2533                                                         }
2534
2535                                                         FD_SET (curr->fd, &sfd);
2536
2537                                                         // registration timeout -- didnt send USER/NICK/HOST in the time specified in
2538                                                         // their connection class.
2539                                                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7))
2540                                                         {
2541                                                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
2542                                                                 kill_link(curr,"Registration timeout");
2543                                                                 goto label;
2544                                                         }
2545                                                         if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
2546                                                         {
2547                                                                 log(DEBUG,"signon exceed, registered=3, and modules ready, OK");
2548                                                                 curr->dns_done = true;
2549                                                                 statsDnsBad++;
2550                                                                 FullConnectUser(curr);
2551                                                                 if (fd_ref_table[currfd] != curr) // something changed, bail pronto
2552                                                                         goto label;
2553                                                         }
2554                                                         if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr))) // both NICK and USER... and DNS
2555                                                         {
2556                                                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
2557                                                                 FullConnectUser(curr);
2558                                                                 if (fd_ref_table[currfd] != curr) // something changed, bail pronto
2559                                                                         goto label;
2560                                                         }
2561                                                         if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
2562                                                         {
2563                                                                 if ((!curr->lastping) && (curr->registered == 7))
2564                                                                 {
2565                                                                         log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
2566                                                                         kill_link(curr,"Ping timeout");
2567                                                                         goto label;
2568                                                                 }
2569                                                                 Write(curr->fd,"PING :%s",ServerName);
2570                                                                 log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
2571                                                                 curr->lastping = 0;
2572                                                                 curr->nping = TIME+curr->pingmax;       // was hard coded to 120
2573                                                         }
2574                                                 }
2575                                                 count2++;
2576                                                 total_in_this_set++;
2577                                         }
2578                                         else break;
2579                                 }
2580                                 endingiter = count2;
2581                                 count2 = xcount; // roll back to where we were
2582 #else
2583                                 // KQUEUE and EPOLL: We don't go through a loop to fill the fd_set so instead we must manually do this loop every now and again.
2584                                 // TODO: We dont need to do all this EVERY loop iteration, tone down the visits to this if we're using kqueue.
2585                                 cycle_iter++;
2586                                 if (cycle_iter > 20) while (count2 != clientlist.end())
2587                                 {
2588                                         cycle_iter = 0;
2589                                         if (count2 != clientlist.end())
2590                                         {
2591                                                 curr = count2->second;
2592                                                 if ((long)curr == -1)
2593                                                         goto label;
2594                                                 int currfd = curr->fd;
2595                                                 // we don't check the state of remote users.
2596                                                 if ((currfd != -1) && (currfd != FD_MAGIC_NUMBER))
2597                                                 {
2598                                                         curr->FlushWriteBuf();
2599                                                         if (curr->GetWriteError() != "")
2600                                                         {
2601                                                                 log(DEBUG,"InspIRCd: write error: %s",curr->GetWriteError().c_str());
2602                                                                 kill_link(curr,curr->GetWriteError().c_str());
2603                                                                 goto label;
2604                                                         }
2605
2606                                                         // registration timeout -- didnt send USER/NICK/HOST in the time specified in
2607                                                         // their connection class.
2608                                                         if (((unsigned)TIME > (unsigned)curr->timeout) && (curr->registered != 7))
2609                                                         {
2610                                                                 log(DEBUG,"InspIRCd: registration timeout: %s",curr->nick);
2611                                                                 kill_link(curr,"Registration timeout");
2612                                                                 goto label;
2613
2614                                                         }
2615                                                         if ((TIME > curr->signon) && (curr->registered == 3) && (AllModulesReportReady(curr)))
2616                                                         {
2617                                                                 log(DEBUG,"signon exceed, registered=3, and modules ready, OK: %d %d",TIME,curr->signon);
2618                                                                 curr->dns_done = true;
2619                                                                 statsDnsBad++;
2620                                                                 FullConnectUser(curr);
2621                                                                 if (fd_ref_table[currfd] != curr) // something changed, bail pronto
2622                                                                         goto label;
2623                                                         }
2624                                                         if ((curr->dns_done) && (curr->registered == 3) && (AllModulesReportReady(curr)))
2625                                                         {
2626                                                                 log(DEBUG,"dns done, registered=3, and modules ready, OK");
2627                                                                 FullConnectUser(curr);
2628                                                                 if (fd_ref_table[currfd] != curr) // something changed, bail pronto
2629                                                                         goto label;
2630                                                         }
2631                                                         if ((TIME > curr->nping) && (isnick(curr->nick)) && (curr->registered == 7))
2632                                                         {
2633                                                                 if ((!curr->lastping) && (curr->registered == 7))
2634                                                                 {
2635                                                                         log(DEBUG,"InspIRCd: ping timeout: %s",curr->nick);
2636                                                                         kill_link(curr,"Ping timeout");
2637                                                                         goto label;
2638                                                                 }
2639                                                                 Write(curr->fd,"PING :%s",ServerName);
2640                                                                 log(DEBUG,"InspIRCd: pinging: %s",curr->nick);
2641                                                                 curr->lastping = 0;
2642                                                                 curr->nping = TIME+curr->pingmax;       // was hard coded to 120
2643                                                         }
2644                                                 }
2645                                         }
2646                                         else break;
2647                                         count2++;
2648                                 }
2649                                 // increment the counter right to the end of the list, as kqueue processes everything in one go
2650 #endif
2651
2652                                 v = 0;
2653                                 engine_fill;
2654
2655 #ifdef _POSIX_PRIORITY_SCHEDULING
2656                                         sched_yield();
2657 #endif
2658                                         result = EAGAIN;
2659                                         if (engine_check)
2660                                         {
2661                                                 log(DEBUG,"Data waiting on socket %d",cu->fd);
2662                                                 int MOD_RESULT = 0;
2663                                                 int result2 = 0;
2664                                                 FOREACH_RESULT(OnRawSocketRead(cu->fd,data,65535,result2));
2665                                                 if (!MOD_RESULT)
2666                                                 {
2667                                                         result = cu->ReadData(data, 65535);
2668                                                 }
2669                                                 else
2670                                                 {
2671                                                         log(DEBUG,"Data result returned by module: %d",MOD_RESULT);
2672                                                         result = result2;
2673                                                 }
2674                                                 log(DEBUG,"Read result: %d",result);
2675                                                 if (result)
2676                                                 {
2677                                                         statsRecv += result;
2678                                                         // perform a check on the raw buffer as an array (not a string!) to remove
2679                                                         // characters 0 and 7 which are illegal in the RFC - replace them with spaces.
2680                                                         // hopefully this should stop even more people whining about "Unknown command: *"
2681                                                         for (int checker = 0; checker < result; checker++)
2682                                                         {
2683                                                                 if ((data[checker] == 0) || (data[checker] == 7))
2684                                                                         data[checker] = ' ';
2685                                                         }
2686                                                         if (result > 0)
2687                                                                 data[result] = '\0';
2688                                                         userrec* current = cu;
2689                                                         int currfd = current->fd;
2690                                                         int floodlines = 0;
2691                                                         // add the data to the users buffer
2692                                                         if (result > 0)
2693                                                         if (!current->AddBuffer(data))
2694                                                         {
2695                                                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
2696                                                                 if (current->registered == 7)
2697                                                                 {
2698                                                                         kill_link(current,"RecvQ exceeded");
2699                                                                 }
2700                                                                 else
2701                                                                 {
2702                                                                         WriteOpers("*** Excess flood from %s",current->ip);
2703                                                                         log(DEFAULT,"Excess flood from: %s",current->ip);
2704                                                                         add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
2705                                                                         apply_lines();
2706                                                                 }
2707                                                                 goto label;
2708                                                         }
2709                                                         if (current->recvq.length() > (unsigned)NetBufferSize)
2710                                                         {
2711                                                                 if (current->registered == 7)
2712                                                                 {
2713                                                                         kill_link(current,"RecvQ exceeded");
2714                                                                 }
2715                                                                 else
2716                                                                 {
2717                                                                         WriteOpers("*** Excess flood from %s",current->ip);
2718                                                                         log(DEFAULT,"Excess flood from: %s",current->ip);
2719                                                                         add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
2720                                                                         apply_lines();
2721                                                                 }
2722                                                                 goto label;
2723                                                         }
2724                                                         // while there are complete lines to process...
2725                                                         while (current->BufferIsReady())
2726                                                         {
2727                                                                 floodlines++;
2728                                                                 if (TIME > current->reset_due)
2729                                                                 {
2730                                                                         current->reset_due = TIME + current->threshold;
2731                                                                         current->lines_in = 0;
2732                                                                 }
2733                                                                 current->lines_in++;
2734                                                                 if (current->lines_in > current->flood)
2735                                                                 {
2736                                                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2737                                                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2738                                                                         kill_link(current,"Excess flood");
2739                                                                         goto label;
2740                                                                 }
2741                                                                 if ((floodlines > current->flood) && (current->flood != 0))
2742                                                                 {
2743                                                                         if (current->registered == 7)
2744                                                                         {
2745                                                                                 log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2746                                                                                 WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2747                                                                                 kill_link(current,"Excess flood");
2748                                                                         }
2749                                                                         else
2750                                                                         {
2751                                                                                 add_zline(120,ServerName,"Flood from unregistered connection",current->ip);
2752                                                                                 apply_lines();
2753                                                                         }
2754                                                                         goto label;
2755                                                                 }
2756                                                                 char sanitized[MAXBUF];
2757                                                                 // use GetBuffer to copy single lines into the sanitized string
2758                                                                 std::string single_line = current->GetBuffer();
2759                                                                 current->bytes_in += single_line.length();
2760                                                                 current->cmds_in++;
2761                                                                 if (single_line.length()>512)
2762                                                                 {
2763                                                                         log(DEFAULT,"Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2764                                                                         WriteOpers("*** Excess flood from: %s!%s@%s",current->nick,current->ident,current->host);
2765                                                                         kill_link(current,"Excess flood");
2766                                                                         goto label;
2767                                                                 }
2768                                                                 strlcpy(sanitized,single_line.c_str(),MAXBUF);
2769                                                                 if (*sanitized)
2770                                                                 {
2771                                                                         userrec* old_comp = fd_ref_table[currfd];
2772                                                                         // we're gonna re-scan to check if the nick is gone, after every
2773                                                                         // command - if it has, we're gonna bail
2774                                                                         process_buffer(sanitized,current);
2775                                                                         // look for the user's record in case it's changed... if theyve quit,
2776                                                                         // we cant do anything more with their buffer, so bail.
2777                                                                         // there used to be an ugly, slow loop here. Now we have a reference
2778                                                                         // table, life is much easier (and FASTER)
2779                                                                         userrec* new_comp = fd_ref_table[currfd];
2780                                                                         if ((currfd < 0) || (!fd_ref_table[currfd]) || (old_comp != new_comp))
2781                                                                                 goto label;
2782
2783                                                                 }
2784                                                         }
2785                                                         goto label;
2786                                                 }
2787
2788                                                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
2789                                                 {
2790                                                         log(DEBUG,"killing: %s",cu->nick);
2791                                                         kill_link(cu,strerror(errno));
2792                                                         goto label;
2793                                                 }
2794                                         }
2795                                         // result EAGAIN means nothing read
2796                                         if (result == EAGAIN)
2797                                         {
2798                                         }
2799                                         else
2800                                         if (result == 0)
2801                                         {
2802                                                 engine_cleanup;
2803                                         }
2804                                         else if (result > 0)
2805                                         {
2806                                         }
2807                                 }
2808                         }
2809                         for (int q = 0; q < total_in_this_set; q++)
2810                         {
2811                                 count2++;
2812                         }
2813                 }
2814
2815 #ifdef _POSIX_PRIORITY_SCHEDULING
2816                 sched_yield();
2817 #endif
2818
2819
2820                 engine_scanset;
2821                                 char target[MAXBUF], resolved[MAXBUF];
2822                                 length = sizeof (client);
2823                                 incomingSockfd = accept (openSockfd[count], (struct sockaddr *) &client, &length);
2824                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
2825
2826                                 strlcpy (target, (char *) inet_ntoa (client.sin_addr), MAXBUF);
2827                                 strlcpy (resolved, target, MAXBUF);
2828
2829                                 if (incomingSockfd < 0)
2830                                 {
2831                                         WriteOpers("*** WARNING: Accept failed on port %lu (%s)",(unsigned long)ports[count],target);
2832                                         log(DEBUG,"InspIRCd: accept failed: %lu",(unsigned long)ports[count]);
2833                                         statsRefused++;
2834                                 }
2835                                 else
2836                                 {
2837                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, resolved, ports[count]);
2838                                         statsAccept++;
2839                                         AddClient(incomingSockfd, resolved, ports[count], false, inet_ntoa (client.sin_addr));
2840                                         log(DEBUG,"InspIRCd: adding client on port %lu fd=%lu",(unsigned long)ports[count],(unsigned long)incomingSockfd);
2841                                 }
2842                         }
2843                 }
2844         }
2845         label:
2846         if (0) {};
2847 #ifdef _POSIX_PRIORITY_SCHEDULING
2848         sched_yield();
2849         sched_yield();
2850 #endif
2851 }
2852 /* not reached */
2853 close (incomingSockfd);
2854 return 0;
2855 }
2856