src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include "inspircd_util.h"
  25 #include <unistd.h>
  26 #include <fcntl.h>
  27 #include <sys/errno.h>
  28 #include <sys/ioctl.h>
  29 #include <sys/utsname.h>
  30 #include <time.h>
  31 #include <string>
  32 #ifdef GCC3
  33 #include <ext/hash_map>
  34 #else
  35 #include <hash_map>
  36 #endif
  37 #include <map>
  38 #include <sstream>
  39 #include <vector>
  40 #include <deque>
  41 #include <sched.h>
  42 #ifdef THREADED_DNS
  43 #include <pthread.h>
  44 #endif
  45 #include "users.h"
  46 #include "ctables.h"
  47 #include "globals.h"
  48 #include "modules.h"
  49 #include "dynamic.h"
  50 #include "wildcard.h"
  51 #include "message.h"
  52 #include "mode.h"
  53 #include "commands.h"
  54 #include "xline.h"
  55 #include "inspstring.h"
  56 #include "dnsqueue.h"
  57 #include "helperfuncs.h"
  58 #include "hashcomp.h"
  59 #include "socketengine.h"
  60 #include "userprocess.h"
  61 #include "socket.h"
  62 #include "dns.h"
  63
  64 int LogLevel = DEFAULT;
  65 char ServerName[MAXBUF];
  66 char Network[MAXBUF];
  67 char ServerDesc[MAXBUF];
  68 char AdminName[MAXBUF];
  69 char AdminEmail[MAXBUF];
  70 char AdminNick[MAXBUF];
  71 char diepass[MAXBUF];
  72 char restartpass[MAXBUF];
  73 char motd[MAXBUF];
  74 char rules[MAXBUF];
  75 char list[MAXBUF];
  76 char PrefixQuit[MAXBUF];
  77 char DieValue[MAXBUF];
  78 char DNSServer[MAXBUF];
  79 char data[65536];
  80 int debugging =  0;
  81 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  82 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  83 int DieDelay  =  5;
  84 time_t startup_time = time(NULL);
  85 int NetBufferSize = 10240;      // NetBufferSize used as the buffer size for all read() ops
  86 int MaxConn = SOMAXCONN;        // size of accept() backlog (128 by default on *BSD)
  87 unsigned int SoftLimit = MAXCLIENTS;
  88 extern int MaxWhoResults;
  89 time_t nb_start = 0;
  90 int dns_timeout = 5;
  91
  92 char DisabledCommands[MAXBUF];
  93
  94 bool AllowHalfop = true;
  95 bool AllowProtect = true;
  96 bool AllowFounder = true;
  97
  98 extern std::vector<Module*> modules;
  99 std::vector<std::string> module_names;
 100 extern std::vector<ircd_module*> factory;
 101
 102 std::vector<InspSocket*> module_sockets;
 103
 104 extern int MODCOUNT;
 105 int openSockfd[MAXSOCKS];
 106 bool nofork = false;
 107 bool unlimitcore = false;
 108 struct sockaddr_in client,server;
 109 char addrs[MAXBUF][255];
 110 socklen_t length;
 111 char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
 112
 113 extern InspSocket* socket_ref[65535];
 114
 115 time_t TIME = time(NULL), OLDTIME = time(NULL);
 116
 117 SocketEngine* SE = NULL;
 118
 119 bool has_been_netsplit = false;
 120 extern std::vector<std::string> include_stack;
 121
 122 typedef nspace::hash_map<std::string, userrec*, nspace::hash<string>, irc::StrHashComp> user_hash;
 123 typedef nspace::hash_map<std::string, chanrec*, nspace::hash<string>, irc::StrHashComp> chan_hash;
 124 typedef nspace::hash_map<in_addr,string*, nspace::hash<in_addr>, irc::InAddr_HashComp> address_cache;
 125 typedef nspace::hash_map<std::string, WhoWasUser*, nspace::hash<string>, irc::StrHashComp> whowas_hash;
 126 typedef std::deque<command_t> command_table;
 127 typedef std::map<std::string,time_t> autoconnects;
 128 typedef std::vector<std::string> servernamelist;
 129
 130 // This table references users by file descriptor.
 131 // its an array to make it VERY fast, as all lookups are referenced
 132 // by an integer, meaning there is no need for a scan/search operation.
 133 userrec* fd_ref_table[65536];
 134
 135 int statsAccept = 0, statsRefused = 0, statsUnknown = 0, statsCollisions = 0, statsDns = 0, statsDnsGood = 0, statsDnsBad = 0, statsConnects = 0, statsSent= 0, statsRecv = 0;
 136
 137 Server* MyServer = new Server;
 138
 139 FILE *log_file;
 140
 141 user_hash clientlist;
 142 chan_hash chanlist;
 143 whowas_hash whowas;
 144 command_table cmdlist;
 145 autoconnects autoconns;
 146 file_cache MOTD;
 147 file_cache RULES;
 148 address_cache IP;
 149
 150 ClassVector Classes;
 151 servernamelist servernames;
 152
 153 struct linger linger = { 0 };
 154 char MyExecutable[1024];
 155 int boundPortCount = 0;
 156 int portCount = 0, SERVERportCount = 0, ports[MAXSOCKS];
 157
 158 char ModPath[MAXBUF];
 159
 160 /* prototypes */
 161
 162 int has_channel(userrec *u, chanrec *c);
 163 int usercount(chanrec *c);
 164 int usercount_i(chanrec *c);
 165 char* Passwd(userrec *user);
 166 bool IsDenied(userrec *user);
 167 void AddWhoWas(userrec* u);
 168
 169 std::stringstream config_f(stringstream::in | stringstream::out);
 170
 171 std::vector<userrec*> all_opers;
 172
 173 char lowermap[255];
 174
 175 void AddOper(userrec* user)
 176 {
 177         log(DEBUG,"Oper added to optimization list");
 178         all_opers.push_back(user);
 179 }
 180
 181 void AddServerName(std::string servername)
 182 {
 183         log(DEBUG,"Adding server name: %s",servername.c_str());
 184         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 185         {
 186                 if (*a == servername)
 187                         return;
 188         }
 189         servernames.push_back(servername);
 190 }
 191
 192 const char* FindServerNamePtr(std::string servername)
 193 {
 194         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 195         {
 196                 if (*a == servername)
 197                         return a->c_str();
 198         }
 199         AddServerName(servername);
 200         return FindServerNamePtr(servername);
 201 }
 202
 203 void DeleteOper(userrec* user)
 204 {
 205         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 206         {
 207                 if (*a == user)
 208                 {
 209                         log(DEBUG,"Oper removed from optimization list");
 210                         all_opers.erase(a);
 211                         return;
 212                 }
 213         }
 214 }
 215
 216 std::string GetRevision()
 217 {
 218         char Revision[] = "$Revision$";
 219         char *s1 = Revision;
 220         char *savept;
 221         char *v2 = strtok_r(s1," ",&savept);
 222         s1 = savept;
 223         v2 = strtok_r(s1," ",&savept);
 224         s1 = savept;
 225         return std::string(v2);
 226 }
 227
 228
 229 std::string getservername()
 230 {
 231         return ServerName;
 232 }
 233
 234 std::string getserverdesc()
 235 {
 236         return ServerDesc;
 237 }
 238
 239 std::string getnetworkname()
 240 {
 241         return Network;
 242 }
 243
 244 std::string getadminname()
 245 {
 246         return AdminName;
 247 }
 248
 249 std::string getadminemail()
 250 {
 251         return AdminEmail;
 252 }
 253
 254 std::string getadminnick()
 255 {
 256         return AdminNick;
 257 }
 258
 259 void ReadConfig(bool bail, userrec* user)
 260 {
 261         char dbg[MAXBUF],pauseval[MAXBUF],Value[MAXBUF],timeout[MAXBUF],NB[MAXBUF],flood[MAXBUF],MW[MAXBUF],MCON[MAXBUF];
 262         char AH[MAXBUF],AP[MAXBUF],AF[MAXBUF],DNT[MAXBUF],pfreq[MAXBUF],thold[MAXBUF],sqmax[MAXBUF],rqmax[MAXBUF],SLIMT[MAXBUF];
 263         ConnectClass c;
 264         std::stringstream errstr;
 265         include_stack.clear();
 266
 267         if (!LoadConf(CONFIG_FILE,&config_f,&errstr))
 268         {
 269                 errstr.seekg(0);
 270                 log(DEFAULT,"There were errors in your configuration:\n%s",errstr.str().c_str());
 271                 if (bail)
 272                 {
 273                         printf("There were errors in your configuration:\n%s",errstr.str().c_str());
 274                         Exit(0);
 275                 }
 276                 else
 277                 {
 278                         char dataline[1024];
 279                         if (user)
 280                         {
 281                                 WriteServ(user->fd,"NOTICE %s :There were errors in the configuration file:",user->nick);
 282                                 while (!errstr.eof())
 283                                 {
 284                                         errstr.getline(dataline,1024);
 285                                         WriteServ(user->fd,"NOTICE %s :%s",user->nick,dataline);
 286                                 }
 287                         }
 288                         else
 289                         {
 290                                 WriteOpers("There were errors in the configuration file:");
 291                                 while (!errstr.eof())
 292                                 {
 293                                         errstr.getline(dataline,1024);
 294                                         WriteOpers(dataline);
 295                                 }
 296                         }
 297                         return;
 298                 }
 299         }
 300
 301         ConfValue("server","name",0,ServerName,&config_f);
 302         ConfValue("server","description",0,ServerDesc,&config_f);
 303         ConfValue("server","network",0,Network,&config_f);
 304         ConfValue("admin","name",0,AdminName,&config_f);
 305         ConfValue("admin","email",0,AdminEmail,&config_f);
 306         ConfValue("admin","nick",0,AdminNick,&config_f);
 307         ConfValue("files","motd",0,motd,&config_f);
 308         ConfValue("files","rules",0,rules,&config_f);
 309         ConfValue("power","diepass",0,diepass,&config_f);
 310         ConfValue("power","pause",0,pauseval,&config_f);
 311         ConfValue("power","restartpass",0,restartpass,&config_f);
 312         ConfValue("options","prefixquit",0,PrefixQuit,&config_f);
 313         ConfValue("die","value",0,DieValue,&config_f);
 314         ConfValue("options","loglevel",0,dbg,&config_f);
 315         ConfValue("options","netbuffersize",0,NB,&config_f);
 316         ConfValue("options","maxwho",0,MW,&config_f);
 317         ConfValue("options","allowhalfop",0,AH,&config_f);
 318         ConfValue("options","allowprotect",0,AP,&config_f);
 319         ConfValue("options","allowfounder",0,AF,&config_f);
 320         ConfValue("dns","server",0,DNSServer,&config_f);
 321         ConfValue("dns","timeout",0,DNT,&config_f);
 322         ConfValue("options","moduledir",0,ModPath,&config_f);
 323         ConfValue("disabled","commands",0,DisabledCommands,&config_f);
 324         ConfValue("options","somaxconn",0,MCON,&config_f);
 325         ConfValue("options","softlimit",0,SLIMT,&config_f);
 326
 327         SoftLimit = atoi(SLIMT);
 328         if ((SoftLimit < 1) || (SoftLimit > MAXCLIENTS))
 329         {
 330                 log(DEFAULT,"WARNING: <options:softlimit> value is greater than %d or less than 0, set to %d.",MAXCLIENTS,MAXCLIENTS);
 331                 SoftLimit = MAXCLIENTS;
 332         }
 333         MaxConn = atoi(MCON);
 334         if (MaxConn > SOMAXCONN)
 335                 log(DEFAULT,"WARNING: <options:somaxconn> value may be higher than the system-defined SOMAXCONN value!");
 336         NetBufferSize = atoi(NB);
 337         MaxWhoResults = atoi(MW);
 338         dns_timeout = atoi(DNT);
 339         if (!dns_timeout)
 340                 dns_timeout = 5;
 341         if (!MaxConn)
 342                 MaxConn = SOMAXCONN;
 343         if (!DNSServer[0])
 344                 strlcpy(DNSServer,"127.0.0.1",MAXBUF);
 345         if (!ModPath[0])
 346                 strlcpy(ModPath,MOD_PATH,MAXBUF);
 347         AllowHalfop = ((!strcasecmp(AH,"true")) || (!strcasecmp(AH,"1")) || (!strcasecmp(AH,"yes")));
 348         AllowProtect = ((!strcasecmp(AP,"true")) || (!strcasecmp(AP,"1")) || (!strcasecmp(AP,"yes")));
 349         AllowFounder = ((!strcasecmp(AF,"true")) || (!strcasecmp(AF,"1")) || (!strcasecmp(AF,"yes")));
 350         if ((!NetBufferSize) || (NetBufferSize > 65535) || (NetBufferSize < 1024))
 351         {
 352                 log(DEFAULT,"No NetBufferSize specified or size out of range, setting to default of 10240.");
 353                 NetBufferSize = 10240;
 354         }
 355         if ((!MaxWhoResults) || (MaxWhoResults > 65535) || (MaxWhoResults < 1))
 356         {
 357                 log(DEFAULT,"No MaxWhoResults specified or size out of range, setting to default of 128.");
 358                 MaxWhoResults = 128;
 359         }
 360         if (!strcmp(dbg,"debug"))
 361                 LogLevel = DEBUG;
 362         if (!strcmp(dbg,"verbose"))
 363                 LogLevel = VERBOSE;
 364         if (!strcmp(dbg,"default"))
 365                 LogLevel = DEFAULT;
 366         if (!strcmp(dbg,"sparse"))
 367                 LogLevel = SPARSE;
 368         if (!strcmp(dbg,"none"))
 369                 LogLevel = NONE;
 370         readfile(MOTD,motd);
 371         log(DEFAULT,"Reading message of the day...");
 372         readfile(RULES,rules);
 373         log(DEFAULT,"Reading connect classes...");
 374         Classes.clear();
 375         for (int i = 0; i < ConfValueEnum("connect",&config_f); i++)
 376         {
 377                 strcpy(Value,"");
 378                 ConfValue("connect","allow",i,Value,&config_f);
 379                 ConfValue("connect","timeout",i,timeout,&config_f);
 380                 ConfValue("connect","flood",i,flood,&config_f);
 381                 ConfValue("connect","pingfreq",i,pfreq,&config_f);
 382                 ConfValue("connect","threshold",i,thold,&config_f);
 383                 ConfValue("connect","sendq",i,sqmax,&config_f);
 384                 ConfValue("connect","recvq",i,rqmax,&config_f);
 385                 if (Value[0])
 386                 {
 387                         strlcpy(c.host,Value,MAXBUF);
 388                         c.type = CC_ALLOW;
 389                         strlcpy(Value,"",MAXBUF);
 390                         ConfValue("connect","password",i,Value,&config_f);
 391                         strlcpy(c.pass,Value,MAXBUF);
 392                         c.registration_timeout = 90; // default is 2 minutes
 393                         c.pingtime = 120;
 394                         c.flood = atoi(flood);
 395                         c.threshold = 5;
 396                         c.sendqmax = 262144; // 256k
 397                         c.recvqmax = 4096;   // 4k
 398                         if (atoi(thold)>0)
 399                         {
 400                                 c.threshold = atoi(thold);
 401                         }
 402                         if (atoi(sqmax)>0)
 403                         {
 404                                 c.sendqmax = atoi(sqmax);
 405                         }
 406                         if (atoi(rqmax)>0)
 407                         {
 408                                 c.recvqmax = atoi(rqmax);
 409                         }
 410                         if (atoi(timeout)>0)
 411                         {
 412                                 c.registration_timeout = atoi(timeout);
 413                         }
 414                         if (atoi(pfreq)>0)
 415                         {
 416                                 c.pingtime = atoi(pfreq);
 417                         }
 418                         Classes.push_back(c);
 419                         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);
 420                 }
 421                 else
 422                 {
 423                         ConfValue("connect","deny",i,Value,&config_f);
 424                         strlcpy(c.host,Value,MAXBUF);
 425                         c.type = CC_DENY;
 426                         Classes.push_back(c);
 427                         log(DEBUG,"Read connect class type DENY, host=%s",c.host);
 428                 }
 429
 430         }
 431         log(DEFAULT,"Reading K lines,Q lines and Z lines from config...");
 432         read_xline_defaults();
 433         log(DEFAULT,"Applying K lines, Q lines and Z lines...");
 434         apply_lines();
 435
 436         autoconns.clear();
 437         for (int i = 0; i < ConfValueEnum("link",&config_f); i++)
 438         {
 439                 char Link_ServerName[MAXBUF],Link_AConn[MAXBUF];
 440                 ConfValue("link","name",i,Link_ServerName,&config_f);
 441                 ConfValue("link","autoconnect",i,Link_AConn,&config_f);
 442                 if (strcmp(Link_AConn,""))
 443                 {
 444                         autoconns[std::string(Link_ServerName)] = atoi(Link_AConn) + time(NULL);
 445                 }
 446         }
 447
 448
 449         log(DEFAULT,"Done reading configuration file, InspIRCd is now starting.");
 450         if (!bail)
 451         {
 452                 log(DEFAULT,"Adding and removing modules due to rehash...");
 453
 454                 std::vector<std::string> old_module_names, new_module_names, added_modules, removed_modules;
 455
 456                 // store the old module names
 457                 for (std::vector<std::string>::iterator t = module_names.begin(); t != module_names.end(); t++)
 458                 {
 459                         old_module_names.push_back(*t);
 460                 }
 461
 462                 // get the new module names
 463                 for (int count2 = 0; count2 < ConfValueEnum("module",&config_f); count2++)
 464                 {
 465                         ConfValue("module","name",count2,Value,&config_f);
 466                         new_module_names.push_back(Value);
 467                 }
 468
 469                 // now create a list of new modules that are due to be loaded
 470                 // and a seperate list of modules which are due to be unloaded
 471                 for (std::vector<std::string>::iterator _new = new_module_names.begin(); _new != new_module_names.end(); _new++)
 472                 {
 473                         bool added = true;
 474                         for (std::vector<std::string>::iterator old = old_module_names.begin(); old != old_module_names.end(); old++)
 475                         {
 476                                 if (*old == *_new)
 477                                         added = false;
 478                         }
 479                         if (added)
 480                                 added_modules.push_back(*_new);
 481                 }
 482                 for (std::vector<std::string>::iterator oldm = old_module_names.begin(); oldm != old_module_names.end(); oldm++)
 483                 {
 484                         bool removed = true;
 485                         for (std::vector<std::string>::iterator newm = new_module_names.begin(); newm != new_module_names.end(); newm++)
 486                         {
 487                                 if (*newm == *oldm)
 488                                         removed = false;
 489                         }
 490                         if (removed)
 491                                 removed_modules.push_back(*oldm);
 492                 }
 493                 // now we have added_modules, a vector of modules to be loaded, and removed_modules, a vector of modules
 494                 // to be removed.
 495                 int rem = 0, add = 0;
 496                 if (!removed_modules.empty())
 497                 for (std::vector<std::string>::iterator removing = removed_modules.begin(); removing != removed_modules.end(); removing++)
 498                 {
 499                         if (UnloadModule(removing->c_str()))
 500                         {
 501                                 WriteOpers("*** REHASH UNLOADED MODULE: %s",removing->c_str());
 502                                 WriteServ(user->fd,"973 %s %s :Module %s successfully unloaded.",user->nick, removing->c_str(), removing->c_str());
 503                                 rem++;
 504                         }
 505                         else
 506                         {
 507                                 WriteServ(user->fd,"972 %s %s :Failed to unload module %s: %s",user->nick, removing->c_str(), removing->c_str(), ModuleError());
 508                         }
 509                 }
 510                 if (!added_modules.empty())
 511                 for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
 512                 {
 513                         if (LoadModule(adding->c_str()))
 514                         {
 515                                 WriteOpers("*** REHASH LOADED MODULE: %s",adding->c_str());
 516                                 WriteServ(user->fd,"975 %s %s :Module %s successfully loaded.",user->nick, adding->c_str(), adding->c_str());
 517                                 add++;
 518                         }
 519                         else
 520                         {
 521                                 WriteServ(user->fd,"974 %s %s :Failed to load module %s: %s",user->nick, adding->c_str(), adding->c_str(), ModuleError());
 522                         }
 523                 }
 524                 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());
 525         }
 526 }
 527
 528
 529 /* add a channel to a user, creating the record for it if needed and linking
 530  * it to the user record */
 531
 532 chanrec* add_channel(userrec *user, const char* cn, const char* key, bool override)
 533 {
 534         if ((!user) || (!cn))
 535         {
 536                 log(DEFAULT,"*** BUG *** add_channel was given an invalid parameter");
 537                 return 0;
 538         }
 539
 540         chanrec* Ptr;
 541         int created = 0;
 542         char cname[MAXBUF];
 543
 544         strncpy(cname,cn,MAXBUF);
 545
 546         // we MUST declare this wherever we use FOREACH_RESULT
 547         int MOD_RESULT = 0;
 548
 549         if (strlen(cname) > CHANMAX)
 550         {
 551                 cname[CHANMAX] = '\0';
 552         }
 553
 554         log(DEBUG,"add_channel: %s %s",user->nick,cname);
 555
 556         if ((FindChan(cname)) && (has_channel(user,FindChan(cname))))
 557         {
 558                 return NULL; // already on the channel!
 559         }
 560
 561
 562         if (!FindChan(cname))
 563         {
 564                 if (!strcasecmp(ServerName,user->server))
 565                 {
 566                         MOD_RESULT = 0;
 567                         FOREACH_RESULT(OnUserPreJoin(user,NULL,cname));
 568                         if (MOD_RESULT == 1) {
 569                                 return NULL;
 570                         }
 571                 }
 572
 573                 /* create a new one */
 574                 log(DEBUG,"add_channel: creating: %s",cname);
 575                 {
 576                         chanlist[cname] = new chanrec();
 577
 578                         strlcpy(chanlist[cname]->name, cname,CHANMAX);
 579                         chanlist[cname]->binarymodes = CM_TOPICLOCK | CM_NOEXTERNAL;
 580                         chanlist[cname]->created = TIME;
 581                         strcpy(chanlist[cname]->topic, "");
 582                         strncpy(chanlist[cname]->setby, user->nick,NICKMAX);
 583                         chanlist[cname]->topicset = 0;
 584                         Ptr = chanlist[cname];
 585                         log(DEBUG,"add_channel: created: %s",cname);
 586                         /* set created to 2 to indicate user
 587                          * is the first in the channel
 588                          * and should be given ops */
 589                         created = 2;
 590                 }
 591         }
 592         else
 593         {
 594                 /* channel exists, just fish out a pointer to its struct */
 595                 Ptr = FindChan(cname);
 596                 if (Ptr)
 597                 {
 598                         log(DEBUG,"add_channel: joining to: %s",Ptr->name);
 599
 600                         // remote users are allowed us to bypass channel modes
 601                         // and bans (used by servers)
 602                         if (!strcasecmp(ServerName,user->server))
 603                         {
 604                                 log(DEBUG,"Not overriding...");
 605                                 MOD_RESULT = 0;
 606                                 FOREACH_RESULT(OnUserPreJoin(user,Ptr,cname));
 607                                 if (MOD_RESULT == 1) {
 608                                         return NULL;
 609                                 }
 610                                 log(DEBUG,"MOD_RESULT=%d",MOD_RESULT);
 611
 612                                 if (!MOD_RESULT)
 613                                 {
 614                                         log(DEBUG,"add_channel: checking key, invite, etc");
 615                                         MOD_RESULT = 0;
 616                                         FOREACH_RESULT(OnCheckKey(user, Ptr, key ? key : ""));
 617                                         if (MOD_RESULT == 0)
 618                                         {
 619                                                 if (Ptr->key[0])
 620                                                 {
 621                                                         log(DEBUG,"add_channel: %s has key %s",Ptr->name,Ptr->key);
 622                                                         if (!key)
 623                                                         {
 624                                                                 log(DEBUG,"add_channel: no key given in JOIN");
 625                                                                 WriteServ(user->fd,"475 %s %s :Cannot join channel (Requires key)",user->nick, Ptr->name);
 626                                                                 return NULL;
 627                                                         }
 628                                                         else
 629                                                         {
 630                                                                 if (strcasecmp(key,Ptr->key))
 631                                                                 {
 632                                                                         log(DEBUG,"add_channel: bad key given in JOIN");
 633                                                                         WriteServ(user->fd,"475 %s %s :Cannot join channel (Incorrect key)",user->nick, Ptr->name);
 634                                                                         return NULL;
 635                                                                 }
 636                                                         }
 637                                                 }
 638                                                 log(DEBUG,"add_channel: no key");
 639                                         }
 640                                         MOD_RESULT = 0;
 641                                         FOREACH_RESULT(OnCheckInvite(user, Ptr));
 642                                         if (MOD_RESULT == 0)
 643                                         {
 644                                                 if (Ptr->binarymodes & CM_INVITEONLY)
 645                                                 {
 646                                                         log(DEBUG,"add_channel: channel is +i");
 647                                                         if (user->IsInvited(Ptr->name))
 648                                                         {
 649                                                                 /* user was invited to channel */
 650                                                                 /* there may be an optional channel NOTICE here */
 651                                                         }
 652                                                         else
 653                                                         {
 654                                                                 WriteServ(user->fd,"473 %s %s :Cannot join channel (Invite only)",user->nick, Ptr->name);
 655                                                                 return NULL;
 656                                                         }
 657                                                 }
 658                                                 log(DEBUG,"add_channel: channel is not +i");
 659                                         }
 660                                         MOD_RESULT = 0;
 661                                         FOREACH_RESULT(OnCheckLimit(user, Ptr));
 662                                         if (MOD_RESULT == 0)
 663                                         {
 664                                                 if (Ptr->limit)
 665                                                 {
 666                                                         if (usercount(Ptr) >= Ptr->limit)
 667                                                         {
 668                                                                 WriteServ(user->fd,"471 %s %s :Cannot join channel (Channel is full)",user->nick, Ptr->name);
 669                                                                 return NULL;
 670                                                         }
 671                                                 }
 672                                         }
 673                                         log(DEBUG,"add_channel: about to walk banlist");
 674                                         MOD_RESULT = 0;
 675                                         FOREACH_RESULT(OnCheckBan(user, Ptr));
 676                                         if (MOD_RESULT == 0)
 677                                         {
 678                                                 /* check user against the channel banlist */
 679                                                 if (Ptr)
 680                                                 {
 681                                                         if (Ptr->bans.size())
 682                                                         {
 683                                                                 for (BanList::iterator i = Ptr->bans.begin(); i != Ptr->bans.end(); i++)
 684                                                                 {
 685                                                                         if (match(user->GetFullHost(),i->data))
 686                                                                         {
 687                                                                                 WriteServ(user->fd,"474 %s %s :Cannot join channel (You're banned)",user->nick, Ptr->name);
 688                                                                                 return NULL;
 689                                                                         }
 690                                                                 }
 691                                                         }
 692                                                 }
 693                                                 log(DEBUG,"add_channel: bans checked");
 694                                         }
 695
 696                                 }
 697
 698
 699                                 if ((Ptr) && (user))
 700                                 {
 701                                         user->RemoveInvite(Ptr->name);
 702                                 }
 703
 704                                 log(DEBUG,"add_channel: invites removed");
 705
 706                         }
 707                         else
 708                         {
 709                                 log(DEBUG,"Overridden checks");
 710                         }
 711
 712
 713                 }
 714                 created = 1;
 715         }
 716
 717         log(DEBUG,"Passed channel checks");
 718
 719         for (unsigned int index =0; index < user->chans.size(); index++)
 720         {
 721                 if (user->chans[index].channel == NULL)
 722                 {
 723                         return ForceChan(Ptr,user->chans[index],user,created);
 724                 }
 725         }
 726         /* XXX: If the user is an oper here, we can just extend their user->chans vector by one
 727          * and put the channel in here. Same for remote users which are not bound by
 728          * the channel limits. Otherwise, nope, youre boned.
 729          */
 730         if (strcasecmp(user->server,ServerName))
 731         {
 732                 ucrec a;
 733                 chanrec* c = ForceChan(Ptr,a,user,created);
 734                 user->chans.push_back(a);
 735                 return c;
 736         }
 737         else if (strchr(user->modes,'o'))
 738         {
 739                 /* Oper allows extension up to the OPERMAXCHANS value */
 740                 if (user->chans.size() < OPERMAXCHANS)
 741                 {
 742                         ucrec a;
 743                         chanrec* c = ForceChan(Ptr,a,user,created);
 744                         user->chans.push_back(a);
 745                         return c;
 746                 }
 747         }
 748         log(DEBUG,"add_channel: user channel max exceeded: %s %s",user->nick,cname);
 749         WriteServ(user->fd,"405 %s %s :You are on too many channels",user->nick, cname);
 750         return NULL;
 751 }
 752
 753 chanrec* ForceChan(chanrec* Ptr,ucrec &a,userrec* user, int created)
 754 {
 755         if (created == 2)
 756         {
 757                 /* first user in is given ops */
 758                 a.uc_modes = UCMODE_OP;
 759         }
 760         else
 761         {
 762                 a.uc_modes = 0;
 763         }
 764         a.channel = Ptr;
 765         Ptr->AddUser((char*)user);
 766         WriteChannel(Ptr,user,"JOIN :%s",Ptr->name);
 767         log(DEBUG,"Sent JOIN to client");
 768         if (Ptr->topicset)
 769         {
 770                 WriteServ(user->fd,"332 %s %s :%s", user->nick, Ptr->name, Ptr->topic);
 771                 WriteServ(user->fd,"333 %s %s %s %lu", user->nick, Ptr->name, Ptr->setby, (unsigned long)Ptr->topicset);
 772         }
 773         userlist(user,Ptr);
 774         WriteServ(user->fd,"366 %s %s :End of /NAMES list.", user->nick, Ptr->name);
 775         FOREACH_MOD OnUserJoin(user,Ptr);
 776         return Ptr;
 777 }
 778
 779 /* remove a channel from a users record, and remove the record from memory
 780  * if the channel has become empty */
 781
 782 chanrec* del_channel(userrec *user, const char* cname, const char* reason, bool local)
 783 {
 784         if ((!user) || (!cname))
 785         {
 786                 log(DEFAULT,"*** BUG *** del_channel was given an invalid parameter");
 787                 return NULL;
 788         }
 789
 790         chanrec* Ptr;
 791
 792         if ((!cname) || (!user))
 793         {
 794                 return NULL;
 795         }
 796
 797         Ptr = FindChan(cname);
 798
 799         if (!Ptr)
 800         {
 801                 return NULL;
 802         }
 803
 804         FOREACH_MOD OnUserPart(user,Ptr);
 805         log(DEBUG,"del_channel: removing: %s %s",user->nick,Ptr->name);
 806
 807         for (unsigned int i =0; i < user->chans.size(); i++)
 808         {
 809                 /* zap it from the channel list of the user */
 810                 if (user->chans[i].channel == Ptr)
 811                 {
 812                         if (reason)
 813                         {
 814                                 WriteChannel(Ptr,user,"PART %s :%s",Ptr->name, reason);
 815                         }
 816                         else
 817                         {
 818                                 WriteChannel(Ptr,user,"PART :%s",Ptr->name);
 819                         }
 820                         user->chans[i].uc_modes = 0;
 821                         user->chans[i].channel = NULL;
 822                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 823                         break;
 824                 }
 825         }
 826
 827         Ptr->DelUser((char*)user);
 828
 829         /* if there are no users left on the channel */
 830         if (!usercount(Ptr))
 831         {
 832                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 833
 834                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 835
 836                 /* kill the record */
 837                 if (iter != chanlist.end())
 838                 {
 839                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 840                         delete Ptr;
 841                         chanlist.erase(iter);
 842                 }
 843         }
 844
 845         return NULL;
 846 }
 847
 848
 849 void kick_channel(userrec *src,userrec *user, chanrec *Ptr, char* reason)
 850 {
 851         if ((!src) || (!user) || (!Ptr) || (!reason))
 852         {
 853                 log(DEFAULT,"*** BUG *** kick_channel was given an invalid parameter");
 854                 return;
 855         }
 856
 857         if ((!Ptr) || (!user) || (!src))
 858         {
 859                 return;
 860         }
 861
 862         log(DEBUG,"kick_channel: removing: %s %s %s",user->nick,Ptr->name,src->nick);
 863
 864         if (!has_channel(user,Ptr))
 865         {
 866                 WriteServ(src->fd,"441 %s %s %s :They are not on that channel",src->nick, user->nick, Ptr->name);
 867                 return;
 868         }
 869
 870         int MOD_RESULT = 0;
 871         FOREACH_RESULT(OnAccessCheck(src,user,Ptr,AC_KICK));
 872         if ((MOD_RESULT == ACR_DENY) && (!is_uline(src->server)))
 873                 return;
 874
 875         if ((MOD_RESULT == ACR_DEFAULT) || (!is_uline(src->server)))
 876         {
 877                 if ((cstatus(src,Ptr) < STATUS_HOP) || (cstatus(src,Ptr) < cstatus(user,Ptr)))
 878                 {
 879                         if (cstatus(src,Ptr) == STATUS_HOP)
 880                         {
 881                                 WriteServ(src->fd,"482 %s %s :You must be a channel operator",src->nick, Ptr->name);
 882                         }
 883                         else
 884                         {
 885                                 WriteServ(src->fd,"482 %s %s :You must be at least a half-operator to change modes on this channel",src->nick, Ptr->name);
 886                         }
 887
 888                         return;
 889                 }
 890         }
 891
 892         if (!is_uline(src->server))
 893         {
 894                 MOD_RESULT = 0;
 895                 FOREACH_RESULT(OnUserPreKick(src,user,Ptr,reason));
 896                 if (MOD_RESULT)
 897                         return;
 898         }
 899
 900         FOREACH_MOD OnUserKick(src,user,Ptr,reason);
 901
 902         for (unsigned int i =0; i < user->chans.size(); i++)
 903         {
 904                 /* zap it from the channel list of the user */
 905                 if (user->chans[i].channel)
 906                 if (!strcasecmp(user->chans[i].channel->name,Ptr->name))
 907                 {
 908                         WriteChannel(Ptr,src,"KICK %s %s :%s",Ptr->name, user->nick, reason);
 909                         user->chans[i].uc_modes = 0;
 910                         user->chans[i].channel = NULL;
 911                         log(DEBUG,"del_channel: unlinked: %s %s",user->nick,Ptr->name);
 912                         break;
 913                 }
 914         }
 915
 916         Ptr->DelUser((char*)user);
 917
 918         /* if there are no users left on the channel */
 919         if (!usercount(Ptr))
 920         {
 921                 chan_hash::iterator iter = chanlist.find(Ptr->name);
 922
 923                 log(DEBUG,"del_channel: destroying channel: %s",Ptr->name);
 924
 925                 /* kill the record */
 926                 if (iter != chanlist.end())
 927                 {
 928                         log(DEBUG,"del_channel: destroyed: %s",Ptr->name);
 929                         delete Ptr;
 930                         chanlist.erase(iter);
 931                 }
 932         }
 933 }
 934
 935
 936
 937
 938 /* This function pokes and hacks at a parameter list like the following:
 939  *
 940  * PART #winbot,#darkgalaxy :m00!
 941  *
 942  * to turn it into a series of individual calls like this:
 943  *
 944  * PART #winbot :m00!
 945  * PART #darkgalaxy :m00!
 946  *
 947  * The seperate calls are sent to a callback function provided by the caller
 948  * (the caller will usually call itself recursively). The callback function
 949  * must be a command handler. Calling this function on a line with no list causes
 950  * no action to be taken. You must provide a starting and ending parameter number
 951  * where the range of the list can be found, useful if you have a terminating
 952  * parameter as above which is actually not part of the list, or parameters
 953  * before the actual list as well. This code is used by many functions which
 954  * can function as "one to list" (see the RFC) */
 955
 956 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 957 {
 958         char plist[MAXBUF];
 959         char *param;
 960         char *pars[32];
 961         char blog[32][MAXBUF];
 962         char blog2[32][MAXBUF];
 963         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 964         char keystr[MAXBUF];
 965         char moo[MAXBUF];
 966
 967         for (int i = 0; i <32; i++)
 968                 strcpy(blog[i],"");
 969
 970         for (int i = 0; i <32; i++)
 971                 strcpy(blog2[i],"");
 972
 973         strcpy(moo,"");
 974         for (int i = 0; i <10; i++)
 975         {
 976                 if (!parameters[i])
 977                 {
 978                         parameters[i] = moo;
 979                 }
 980         }
 981         if (joins)
 982         {
 983                 if (pcnt > 1) /* we have a key to copy */
 984                 {
 985                         strlcpy(keystr,parameters[1],MAXBUF);
 986                 }
 987         }
 988
 989         if (!parameters[start])
 990         {
 991                 return 0;
 992         }
 993         if (!strchr(parameters[start],','))
 994         {
 995                 return 0;
 996         }
 997         strcpy(plist,"");
 998         for (int i = start; i <= end; i++)
 999         {
1000                 if (parameters[i])
1001                 {
1002                         strlcat(plist,parameters[i],MAXBUF);
1003                 }
1004         }
1005
1006         j = 0;
1007         param = plist;
1008
1009         t = strlen(plist);
1010         for (int i = 0; i < t; i++)
1011         {
1012                 if (plist[i] == ',')
1013                 {
1014                         plist[i] = '\0';
1015                         strlcpy(blog[j++],param,MAXBUF);
1016                         param = plist+i+1;
1017                         if (j>20)
1018                         {
1019                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
1020                                 return 1;
1021                         }
1022                 }
1023         }
1024         strlcpy(blog[j++],param,MAXBUF);
1025         total = j;
1026
1027         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
1028         {
1029                 strcat(keystr,",");
1030         }
1031
1032         if ((joins) && (keystr))
1033         {
1034                 if (strchr(keystr,','))
1035                 {
1036                         j = 0;
1037                         param = keystr;
1038                         t2 = strlen(keystr);
1039                         for (int i = 0; i < t2; i++)
1040                         {
1041                                 if (keystr[i] == ',')
1042                                 {
1043                                         keystr[i] = '\0';
1044                                         strlcpy(blog2[j++],param,MAXBUF);
1045                                         param = keystr+i+1;
1046                                 }
1047                         }
1048                         strlcpy(blog2[j++],param,MAXBUF);
1049                         total2 = j;
1050                 }
1051         }
1052
1053         for (j = 0; j < total; j++)
1054         {
1055                 if (blog[j])
1056                 {
1057                         pars[0] = blog[j];
1058                 }
1059                 for (q = end; q < pcnt-1; q++)
1060                 {
1061                         if (parameters[q+1])
1062                         {
1063                                 pars[q-end+1] = parameters[q+1];
1064                         }
1065                 }
1066                 if ((joins) && (parameters[1]))
1067                 {
1068                         if (pcnt > 1)
1069                         {
1070                                 pars[1] = blog2[j];
1071                         }
1072                         else
1073                         {
1074                                 pars[1] = NULL;
1075                         }
1076                 }
1077                 /* repeatedly call the function with the hacked parameter list */
1078                 if ((joins) && (pcnt > 1))
1079                 {
1080                         if (pars[1])
1081                         {
1082                                 // pars[1] already set up and containing key from blog2[j]
1083                                 fn(pars,2,u);
1084                         }
1085                         else
1086                         {
1087                                 pars[1] = parameters[1];
1088                                 fn(pars,2,u);
1089                         }
1090                 }
1091                 else
1092                 {
1093                         fn(pars,pcnt-(end-start),u);
1094                 }
1095         }
1096
1097         return 1;
1098 }
1099
1100
1101
1102 void kill_link(userrec *user,const char* r)
1103 {
1104         user_hash::iterator iter = clientlist.find(user->nick);
1105
1106         char reason[MAXBUF];
1107
1108         strncpy(reason,r,MAXBUF);
1109
1110         if (strlen(reason)>MAXQUIT)
1111         {
1112                 reason[MAXQUIT-1] = '\0';
1113         }
1114
1115         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1116         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1117         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1118
1119         if (user->registered == 7) {
1120                 FOREACH_MOD OnUserQuit(user,reason);
1121                 WriteCommonExcept(user,"QUIT :%s",reason);
1122         }
1123
1124         user->FlushWriteBuf();
1125
1126         FOREACH_MOD OnUserDisconnect(user);
1127
1128         if (user->fd > -1)
1129         {
1130                 FOREACH_MOD OnRawSocketClose(user->fd);
1131                 SE->DelFd(user->fd);
1132                 user->CloseSocket();
1133         }
1134
1135         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
1136         // if they were an oper with +s.
1137         if (user->registered == 7) {
1138                 purge_empty_chans(user);
1139                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
1140                 if (!strcmp(user->server,ServerName))
1141                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
1142                 AddWhoWas(user);
1143         }
1144
1145         if (iter != clientlist.end())
1146         {
1147                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1148                 if (user->fd > -1)
1149                         fd_ref_table[user->fd] = NULL;
1150                 clientlist.erase(iter);
1151         }
1152         delete user;
1153 }
1154
1155 void kill_link_silent(userrec *user,const char* r)
1156 {
1157         user_hash::iterator iter = clientlist.find(user->nick);
1158
1159         char reason[MAXBUF];
1160
1161         strncpy(reason,r,MAXBUF);
1162
1163         if (strlen(reason)>MAXQUIT)
1164         {
1165                 reason[MAXQUIT-1] = '\0';
1166         }
1167
1168         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
1169         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
1170         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
1171
1172         user->FlushWriteBuf();
1173
1174         if (user->registered == 7) {
1175                 FOREACH_MOD OnUserQuit(user,reason);
1176                 WriteCommonExcept(user,"QUIT :%s",reason);
1177         }
1178
1179         FOREACH_MOD OnUserDisconnect(user);
1180
1181         if (user->fd > -1)
1182         {
1183                 FOREACH_MOD OnRawSocketClose(user->fd);
1184                 SE->DelFd(user->fd);
1185                 user->CloseSocket();
1186         }
1187
1188         if (user->registered == 7) {
1189                 purge_empty_chans(user);
1190         }
1191
1192         if (iter != clientlist.end())
1193         {
1194                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
1195                 if (user->fd > -1)
1196                         fd_ref_table[user->fd] = NULL;
1197                 clientlist.erase(iter);
1198         }
1199         delete user;
1200 }
1201
1202
1203 int main(int argc, char** argv)
1204 {
1205         Start();
1206         srand(time(NULL));
1207         log(DEBUG,"*** InspIRCd starting up!");
1208         if (!FileExists(CONFIG_FILE))
1209         {
1210                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
1211                 log(DEFAULT,"main: no config");
1212                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
1213                 Exit(ERROR);
1214         }
1215         if (argc > 1) {
1216                 for (int i = 1; i < argc; i++)
1217                 {
1218                         if (!strcmp(argv[i],"-nofork")) {
1219                                 nofork = true;
1220                         }
1221                         if (!strcmp(argv[i],"-wait")) {
1222                                 sleep(6);
1223                         }
1224                         if (!strcmp(argv[i],"-nolimit")) {
1225                                 unlimitcore = true;
1226                         }
1227                 }
1228         }
1229
1230         strlcpy(MyExecutable,argv[0],MAXBUF);
1231
1232         // initialize the lowercase mapping table
1233         for (unsigned int cn = 0; cn < 256; cn++)
1234                 lowermap[cn] = cn;
1235         // lowercase the uppercase chars
1236         for (unsigned int cn = 65; cn < 91; cn++)
1237                 lowermap[cn] = tolower(cn);
1238         // now replace the specific chars for scandanavian comparison
1239         lowermap[(unsigned)'['] = '{';
1240         lowermap[(unsigned)']'] = '}';
1241         lowermap[(unsigned)'\\'] = '|';
1242
1243         if (InspIRCd(argv,argc) == ERROR)
1244         {
1245                 log(DEFAULT,"main: daemon function bailed");
1246                 printf("ERROR: could not initialise. Shutting down.\n");
1247                 Exit(ERROR);
1248         }
1249         Exit(TRUE);
1250         return 0;
1251 }
1252
1253 template<typename T> inline string ConvToStr(const T &in)
1254 {
1255         stringstream tmp;
1256         if (!(tmp << in)) return string();
1257         return tmp.str();
1258 }
1259
1260 /* re-allocates a nick in the user_hash after they change nicknames,
1261  * returns a pointer to the new user as it may have moved */
1262
1263 userrec* ReHashNick(char* Old, char* New)
1264 {
1265         //user_hash::iterator newnick;
1266         user_hash::iterator oldnick = clientlist.find(Old);
1267
1268         log(DEBUG,"ReHashNick: %s %s",Old,New);
1269
1270         if (!strcasecmp(Old,New))
1271         {
1272                 log(DEBUG,"old nick is new nick, skipping");
1273                 return oldnick->second;
1274         }
1275
1276         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
1277
1278         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1279
1280         userrec* olduser = oldnick->second;
1281         clientlist[New] = olduser;
1282         clientlist.erase(oldnick);
1283
1284         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1285
1286         return clientlist[New];
1287 }
1288
1289 /* adds or updates an entry in the whowas list */
1290 void AddWhoWas(userrec* u)
1291 {
1292         whowas_hash::iterator iter = whowas.find(u->nick);
1293         WhoWasUser *a = new WhoWasUser();
1294         strlcpy(a->nick,u->nick,NICKMAX);
1295         strlcpy(a->ident,u->ident,IDENTMAX);
1296         strlcpy(a->dhost,u->dhost,160);
1297         strlcpy(a->host,u->host,160);
1298         strlcpy(a->fullname,u->fullname,MAXGECOS);
1299         strlcpy(a->server,u->server,256);
1300         a->signon = u->signon;
1301
1302         /* MAX_WHOWAS:   max number of /WHOWAS items
1303          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
1304          *               can be replaced by a newer one
1305          */
1306
1307         if (iter == whowas.end())
1308         {
1309                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
1310                 {
1311                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
1312                         {
1313                                 // 3600 seconds in an hour ;)
1314                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
1315                                 {
1316                                         // delete the old one
1317                                         if (i->second) delete i->second;
1318                                         // replace with new one
1319                                         i->second = a;
1320                                         log(DEBUG,"added WHOWAS entry, purged an old record");
1321                                         return;
1322                                 }
1323                         }
1324                         // no space left and user doesnt exist. Don't leave ram in use!
1325                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
1326                         delete a;
1327                 }
1328                 else
1329                 {
1330                         log(DEBUG,"added fresh WHOWAS entry");
1331                         whowas[a->nick] = a;
1332                 }
1333         }
1334         else
1335         {
1336                 log(DEBUG,"updated WHOWAS entry");
1337                 if (iter->second) delete iter->second;
1338                 iter->second = a;
1339         }
1340 }
1341
1342 #ifdef THREADED_DNS
1343 void* dns_task(void* arg)
1344 {
1345         userrec* u = (userrec*)arg;
1346         log(DEBUG,"DNS thread for user %s",u->nick);
1347         DNS dns1;
1348         DNS dns2;
1349         std::string host;
1350         std::string ip;
1351         if (dns1.ReverseLookup(u->ip))
1352         {
1353                 log(DEBUG,"DNS Step 1");
1354                 while (!dns1.HasResult())
1355                 {
1356                         usleep(100);
1357                 }
1358                 host = dns1.GetResult();
1359                 if (host != "")
1360                 {
1361                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
1362                         if (dns2.ForwardLookup(host))
1363                         {
1364                                 while (!dns2.HasResult())
1365                                 {
1366                                         usleep(100);
1367                                 }
1368                                 ip = dns2.GetResultIP();
1369                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
1370                                 if (ip == std::string(u->ip))
1371                                 {
1372                                         log(DEBUG,"DNS Step 4");
1373                                         if (host.length() < 160)
1374                                         {
1375                                                 log(DEBUG,"DNS Step 5");
1376                                                 strcpy(u->host,host.c_str());
1377                                                 strcpy(u->dhost,host.c_str());
1378                                         }
1379                                 }
1380                         }
1381                 }
1382         }
1383         u->dns_done = true;
1384         return NULL;
1385 }
1386 #endif
1387
1388 /* add a client connection to the sockets list */
1389 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
1390 {
1391         string tempnick;
1392         char tn2[MAXBUF];
1393         user_hash::iterator iter;
1394
1395         tempnick = ConvToStr(socket) + "-unknown";
1396         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
1397
1398         iter = clientlist.find(tempnick);
1399
1400         // fix by brain.
1401         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
1402         // using one as a registered connection. As theyre per fd, we can also safely assume
1403         // that we wont have collisions. Therefore, if the nick exists in the list, its only
1404         // used by a dead socket, erase the iterator so that the new client may reclaim it.
1405         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
1406         // issue in earlier alphas/betas
1407         if (iter != clientlist.end())
1408         {
1409                 userrec* goner = iter->second;
1410                 delete goner;
1411                 clientlist.erase(iter);
1412         }
1413
1414         /*
1415          * It is OK to access the value here this way since we know
1416          * it exists, we just created it above.
1417          *
1418          * At NO other time should you access a value in a map or a
1419          * hash_map this way.
1420          */
1421         clientlist[tempnick] = new userrec();
1422
1423         NonBlocking(socket);
1424         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
1425
1426         clientlist[tempnick]->fd = socket;
1427         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
1428         strlcpy(clientlist[tempnick]->host, host,160);
1429         strlcpy(clientlist[tempnick]->dhost, host,160);
1430         clientlist[tempnick]->server = (char*)FindServerNamePtr(ServerName);
1431         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
1432         clientlist[tempnick]->registered = 0;
1433         clientlist[tempnick]->signon = TIME+dns_timeout;
1434         clientlist[tempnick]->lastping = 1;
1435         clientlist[tempnick]->port = port;
1436         strlcpy(clientlist[tempnick]->ip,ip,16);
1437
1438         // set the registration timeout for this user
1439         unsigned long class_regtimeout = 90;
1440         int class_flood = 0;
1441         long class_threshold = 5;
1442         long class_sqmax = 262144;      // 256kb
1443         long class_rqmax = 4096;        // 4k
1444
1445         for (ClassVector::iterator i = Classes.begin(); i != Classes.end(); i++)
1446         {
1447                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
1448                 {
1449                         class_regtimeout = (unsigned long)i->registration_timeout;
1450                         class_flood = i->flood;
1451                         clientlist[tempnick]->pingmax = i->pingtime;
1452                         class_threshold = i->threshold;
1453                         class_sqmax = i->sendqmax;
1454                         class_rqmax = i->recvqmax;
1455                         break;
1456                 }
1457         }
1458
1459         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax+dns_timeout;
1460         clientlist[tempnick]->timeout = TIME+class_regtimeout;
1461         clientlist[tempnick]->flood = class_flood;
1462         clientlist[tempnick]->threshold = class_threshold;
1463         clientlist[tempnick]->sendqmax = class_sqmax;
1464         clientlist[tempnick]->recvqmax = class_rqmax;
1465
1466         ucrec a;
1467         a.channel = NULL;
1468         a.uc_modes = 0;
1469         for (int i = 0; i < MAXCHANS; i++)
1470                 clientlist[tempnick]->chans.push_back(a);
1471
1472         if (clientlist.size() > SoftLimit)
1473         {
1474                 kill_link(clientlist[tempnick],"No more connections allowed");
1475                 return;
1476         }
1477
1478         if (clientlist.size() >= MAXCLIENTS)
1479         {
1480                 kill_link(clientlist[tempnick],"No more connections allowed");
1481                 return;
1482         }
1483
1484         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
1485         // its a pretty big but for the moment valid assumption:
1486         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
1487         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
1488         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
1489         // which for the time being is a physical impossibility (even the largest networks dont have more
1490         // than about 10,000 users on ONE server!)
1491         if ((unsigned)socket > 65534)
1492         {
1493                 kill_link(clientlist[tempnick],"Server is full");
1494                 return;
1495         }
1496
1497
1498         char* e = matches_exception(ip);
1499         if (!e)
1500         {
1501                 char* r = matches_zline(ip);
1502                 if (r)
1503                 {
1504                         char reason[MAXBUF];
1505                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
1506                         kill_link(clientlist[tempnick],reason);
1507                         return;
1508                 }
1509         }
1510         fd_ref_table[socket] = clientlist[tempnick];
1511         SE->AddFd(socket,true,X_ESTAB_CLIENT);
1512 }
1513
1514 /* shows the message of the day, and any other on-logon stuff */
1515 void FullConnectUser(userrec* user)
1516 {
1517         statsConnects++;
1518         user->idle_lastmsg = TIME;
1519         log(DEBUG,"ConnectUser: %s",user->nick);
1520
1521         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
1522         {
1523                 kill_link(user,"Invalid password");
1524                 return;
1525         }
1526         if (IsDenied(user))
1527         {
1528                 kill_link(user,"Unauthorised connection");
1529                 return;
1530         }
1531
1532         char match_against[MAXBUF];
1533         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
1534         char* e = matches_exception(match_against);
1535         if (!e)
1536         {
1537                 char* r = matches_gline(match_against);
1538                 if (r)
1539                 {
1540                         char reason[MAXBUF];
1541                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1542                         kill_link_silent(user,reason);
1543                         return;
1544                 }
1545                 r = matches_kline(user->host);
1546                 if (r)
1547                 {
1548                         char reason[MAXBUF];
1549                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1550                         kill_link_silent(user,reason);
1551                         return;
1552                 }
1553         }
1554
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 << "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 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
1590         // onto the network and produce 'fake direction'
1591         FOREACH_MOD OnUserConnect(user);
1592         FOREACH_MOD OnGlobalConnect(user);
1593         user->registered = 7;
1594         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
1595 }
1596
1597
1598 /* shows the message of the day, and any other on-logon stuff */
1599 void ConnectUser(userrec *user)
1600 {
1601         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
1602         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
1603         {
1604                 FullConnectUser(user);
1605         }
1606 }
1607
1608 std::string GetVersionString()
1609 {
1610         char Revision[] = "$Revision$";
1611         char versiondata[MAXBUF];
1612         char *s1 = Revision;
1613         char *savept;
1614         char *v2 = strtok_r(s1," ",&savept);
1615         s1 = savept;
1616         v2 = strtok_r(s1," ",&savept);
1617         s1 = savept;
1618 #ifdef THREADED_DNS
1619         char dnsengine[] = "multithread";
1620 #else
1621         char dnsengine[] = "singlethread";
1622 #endif
1623         snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,v2,ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
1624         return versiondata;
1625 }
1626
1627 void handle_version(char **parameters, int pcnt, userrec *user)
1628 {
1629         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
1630 }
1631
1632
1633 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
1634 {
1635         for (unsigned int i = 0; i < cmdlist.size(); i++)
1636         {
1637                 if (!strcasecmp(cmdlist[i].command,commandname))
1638                 {
1639                         if (cmdlist[i].handler_function)
1640                         {
1641                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
1642                                 {
1643                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1644                                         {
1645                                                 if (cmdlist[i].flags_needed)
1646                                                 {
1647                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
1648                                                         {
1649                                                                 return true;
1650                                                         }
1651                                                         else
1652                                                         {
1653                                                                 return false;
1654                                                         }
1655                                                 }
1656                                                 return true;
1657                                         }
1658                                 }
1659                         }
1660                 }
1661         }
1662         return false;
1663 }
1664
1665 // calls a handler function for a command
1666
1667 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
1668 {
1669         for (unsigned int i = 0; i < cmdlist.size(); i++)
1670         {
1671                 if (!strcasecmp(cmdlist[i].command,commandname))
1672                 {
1673                         if (cmdlist[i].handler_function)
1674                         {
1675                                 if (pcnt>=cmdlist[i].min_params)
1676                                 {
1677                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
1678                                         {
1679                                                 if (cmdlist[i].flags_needed)
1680                                                 {
1681                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
1682                                                         {
1683                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
1684                                                         }
1685                                                 }
1686                                                 else
1687                                                 {
1688                                                         cmdlist[i].handler_function(parameters,pcnt,user);
1689                                                 }
1690                                         }
1691                                 }
1692                         }
1693                 }
1694         }
1695 }
1696
1697
1698 void force_nickchange(userrec* user,const char* newnick)
1699 {
1700         char nick[MAXBUF];
1701         int MOD_RESULT = 0;
1702
1703         strcpy(nick,"");
1704
1705         FOREACH_RESULT(OnUserPreNick(user,newnick));
1706         if (MOD_RESULT) {
1707                 statsCollisions++;
1708                 kill_link(user,"Nickname collision");
1709                 return;
1710         }
1711         if (matches_qline(newnick))
1712         {
1713                 statsCollisions++;
1714                 kill_link(user,"Nickname collision");
1715                 return;
1716         }
1717
1718         if (user)
1719         {
1720                 if (newnick)
1721                 {
1722                         strncpy(nick,newnick,MAXBUF);
1723                 }
1724                 if (user->registered == 7)
1725                 {
1726                         char* pars[1];
1727                         pars[0] = nick;
1728                         handle_nick(pars,1,user);
1729                 }
1730         }
1731 }
1732
1733
1734 int process_parameters(char **command_p,char *parameters)
1735 {
1736         int j = 0;
1737         int q = strlen(parameters);
1738         if (!q)
1739         {
1740                 /* no parameters, command_p invalid! */
1741                 return 0;
1742         }
1743         if (parameters[0] == ':')
1744         {
1745                 command_p[0] = parameters+1;
1746                 return 1;
1747         }
1748         if (q)
1749         {
1750                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
1751                 {
1752                         /* only one parameter */
1753                         command_p[0] = parameters;
1754                         if (parameters[0] == ':')
1755                         {
1756                                 if (strchr(parameters,' ') != NULL)
1757                                 {
1758                                         command_p[0]++;
1759                                 }
1760                         }
1761                         return 1;
1762                 }
1763         }
1764         command_p[j++] = parameters;
1765         for (int i = 0; i <= q; i++)
1766         {
1767                 if (parameters[i] == ' ')
1768                 {
1769                         command_p[j++] = parameters+i+1;
1770                         parameters[i] = '\0';
1771                         if (command_p[j-1][0] == ':')
1772                         {
1773                                 *command_p[j-1]++; /* remove dodgy ":" */
1774                                 break;
1775                                 /* parameter like this marks end of the sequence */
1776                         }
1777                 }
1778         }
1779         return j; /* returns total number of items in the list */
1780 }
1781
1782 void process_command(userrec *user, char* cmd)
1783 {
1784         char *parameters;
1785         char *command;
1786         char *command_p[127];
1787         char p[MAXBUF], temp[MAXBUF];
1788         int j, items, cmd_found;
1789
1790         for (int i = 0; i < 127; i++)
1791                 command_p[i] = NULL;
1792
1793         if (!user)
1794         {
1795                 return;
1796         }
1797         if (!cmd)
1798         {
1799                 return;
1800         }
1801         if (!cmd[0])
1802         {
1803                 return;
1804         }
1805
1806         int total_params = 0;
1807         if (strlen(cmd)>2)
1808         {
1809                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1810                 {
1811                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1812                         {
1813                                 total_params++;
1814                                 // found a 'trailing', we dont count them after this.
1815                                 break;
1816                         }
1817                         if (cmd[q] == ' ')
1818                                 total_params++;
1819                 }
1820         }
1821
1822         // another phidjit bug...
1823         if (total_params > 126)
1824         {
1825                 *(strchr(cmd,' ')) = '\0';
1826                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1827                 return;
1828         }
1829
1830         strlcpy(temp,cmd,MAXBUF);
1831
1832         std::string tmp = cmd;
1833         for (int i = 0; i <= MODCOUNT; i++)
1834         {
1835                 std::string oldtmp = tmp;
1836                 modules[i]->OnServerRaw(tmp,true,user);
1837                 if (oldtmp != tmp)
1838                 {
1839                         log(DEBUG,"A Module changed the input string!");
1840                         log(DEBUG,"New string: %s",tmp.c_str());
1841                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1842                         break;
1843                 }
1844         }
1845         strlcpy(cmd,tmp.c_str(),MAXBUF);
1846         strlcpy(temp,cmd,MAXBUF);
1847
1848         if (!strchr(cmd,' '))
1849         {
1850                 /* no parameters, lets skip the formalities and not chop up
1851                  * the string */
1852                 log(DEBUG,"About to preprocess command with no params");
1853                 items = 0;
1854                 command_p[0] = NULL;
1855                 parameters = NULL;
1856                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1857                 {
1858                         cmd[i] = toupper(cmd[i]);
1859                 }
1860                 command = cmd;
1861         }
1862         else
1863         {
1864                 strcpy(cmd,"");
1865                 j = 0;
1866                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1867                 for (unsigned int i = 0; i < strlen(temp); i++)
1868                 {
1869                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1870                         {
1871                                 cmd[j++] = temp[i];
1872                                 cmd[j] = 0;
1873                         }
1874                 }
1875                 /* split the full string into a command plus parameters */
1876                 parameters = p;
1877                 strcpy(p," ");
1878                 command = cmd;
1879                 if (strchr(cmd,' '))
1880                 {
1881                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1882                         {
1883                                 /* capitalise the command ONLY, leave params intact */
1884                                 cmd[i] = toupper(cmd[i]);
1885                                 /* are we nearly there yet?! :P */
1886                                 if (cmd[i] == ' ')
1887                                 {
1888                                         command = cmd;
1889                                         parameters = cmd+i+1;
1890                                         cmd[i] = '\0';
1891                                         break;
1892                                 }
1893                         }
1894                 }
1895                 else
1896                 {
1897                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1898                         {
1899                                 cmd[i] = toupper(cmd[i]);
1900                         }
1901                 }
1902
1903         }
1904         cmd_found = 0;
1905
1906         if (strlen(command)>MAXCOMMAND)
1907         {
1908                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1909                 return;
1910         }
1911
1912         for (unsigned int x = 0; x < strlen(command); x++)
1913         {
1914                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1915                 {
1916                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1917                         {
1918                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1919                                 {
1920                                         statsUnknown++;
1921                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1922                                         return;
1923                                 }
1924                         }
1925                 }
1926         }
1927
1928         for (unsigned int i = 0; i != cmdlist.size(); i++)
1929         {
1930                 if (cmdlist[i].command[0])
1931                 {
1932                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1933                         {
1934                                 if (parameters)
1935                                 {
1936                                         if (parameters[0])
1937                                         {
1938                                                 items = process_parameters(command_p,parameters);
1939                                         }
1940                                         else
1941                                         {
1942                                                 items = 0;
1943                                                 command_p[0] = NULL;
1944                                         }
1945                                 }
1946                                 else
1947                                 {
1948                                         items = 0;
1949                                         command_p[0] = NULL;
1950                                 }
1951
1952                                 if (user)
1953                                 {
1954                                         /* activity resets the ping pending timer */
1955                                         user->nping = TIME + user->pingmax;
1956                                         if ((items) < cmdlist[i].min_params)
1957                                         {
1958                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1959                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1960                                                 return;
1961                                         }
1962                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1963                                         {
1964                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1965                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1966                                                 cmd_found = 1;
1967                                                 return;
1968                                         }
1969                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1970                                         {
1971                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1972                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1973                                                 cmd_found = 1;
1974                                                 return;
1975                                         }
1976                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1977                                          * deny command! */
1978                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1979                                         {
1980                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1981                                                 {
1982                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1983                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1984                                                         return;
1985                                                 }
1986                                         }
1987                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1988                                         {
1989                                                 std::stringstream dcmds(DisabledCommands);
1990                                                 while (!dcmds.eof())
1991                                                 {
1992                                                         std::string thiscmd;
1993                                                         dcmds >> thiscmd;
1994                                                         if (!strcasecmp(thiscmd.c_str(),command))
1995                                                         {
1996                                                                 // command is disabled!
1997                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1998                                                                 return;
1999                                                         }
2000                                                 }
2001                                         }
2002                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
2003                                         {
2004                                                 if (cmdlist[i].handler_function)
2005                                                 {
2006
2007                                                         /* ikky /stats counters */
2008                                                         if (temp)
2009                                                         {
2010                                                                 cmdlist[i].use_count++;
2011                                                                 cmdlist[i].total_bytes+=strlen(temp);
2012                                                         }
2013
2014                                                         int MOD_RESULT = 0;
2015                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
2016                                                         if (MOD_RESULT == 1) {
2017                                                                 return;
2018                                                         }
2019
2020                                                         /* WARNING: nothing may come after the
2021                                                          * command handler call, as the handler
2022                                                          * may free the user structure! */
2023
2024                                                         cmdlist[i].handler_function(command_p,items,user);
2025                                                 }
2026                                                 return;
2027                                         }
2028                                         else
2029                                         {
2030                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
2031                                                 return;
2032                                         }
2033                                 }
2034                                 cmd_found = 1;
2035                         }
2036                 }
2037         }
2038         if ((!cmd_found) && (user))
2039         {
2040                 statsUnknown++;
2041                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
2042         }
2043 }
2044
2045 bool removecommands(const char* source)
2046 {
2047         bool go_again = true;
2048         while (go_again)
2049         {
2050                 go_again = false;
2051                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
2052                 {
2053                         if (!strcmp(i->source,source))
2054                         {
2055                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
2056                                 cmdlist.erase(i);
2057                                 go_again = true;
2058                                 break;
2059                         }
2060                 }
2061         }
2062         return true;
2063 }
2064
2065
2066 void process_buffer(const char* cmdbuf,userrec *user)
2067 {
2068         if (!user)
2069         {
2070                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2071                 return;
2072         }
2073         char cmd[MAXBUF];
2074         if (!cmdbuf)
2075         {
2076                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
2077                 return;
2078         }
2079         if (!cmdbuf[0])
2080         {
2081                 return;
2082         }
2083         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
2084
2085         strlcpy(cmd,cmdbuf,MAXBUF);
2086         if (!cmd[0])
2087         {
2088                 return;
2089         }
2090         int sl = strlen(cmd)-1;
2091         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2092         {
2093                 cmd[sl] = '\0';
2094         }
2095         sl = strlen(cmd)-1;
2096         if ((cmd[sl] == 13) || (cmd[sl] == 10))
2097         {
2098                 cmd[sl] = '\0';
2099         }
2100         sl = strlen(cmd)-1;
2101         while (cmd[sl] == ' ') // strip trailing spaces
2102         {
2103                 cmd[sl] = '\0';
2104                 sl = strlen(cmd)-1;
2105         }
2106
2107         if (!cmd[0])
2108         {
2109                 return;
2110         }
2111         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
2112         tidystring(cmd);
2113         if ((user) && (cmd))
2114         {
2115                 process_command(user,cmd);
2116         }
2117 }
2118
2119 char MODERR[MAXBUF];
2120
2121 char* ModuleError()
2122 {
2123         return MODERR;
2124 }
2125
2126 void erase_factory(int j)
2127 {
2128         int v = 0;
2129         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
2130         {
2131                 if (v == j)
2132                 {
2133                         factory.erase(t);
2134                         factory.push_back(NULL);
2135                         return;
2136                 }
2137                 v++;
2138         }
2139 }
2140
2141 void erase_module(int j)
2142 {
2143         int v1 = 0;
2144         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
2145         {
2146                 if (v1 == j)
2147                 {
2148                         delete *m;
2149                         modules.erase(m);
2150                         modules.push_back(NULL);
2151                         break;
2152                 }
2153                 v1++;
2154         }
2155         int v2 = 0;
2156         for (std::vector<std::string>::iterator v = module_names.begin(); v != module_names.end(); v++)
2157         {
2158                 if (v2 == j)
2159                 {
2160                        module_names.erase(v);
2161                        break;
2162                 }
2163                 v2++;
2164         }
2165
2166 }
2167
2168 bool UnloadModule(const char* filename)
2169 {
2170         std::string filename_str = filename;
2171         for (unsigned int j = 0; j != module_names.size(); j++)
2172         {
2173                 if (module_names[j] == filename_str)
2174                 {
2175                         if (modules[j]->GetVersion().Flags & VF_STATIC)
2176                         {
2177                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
2178                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
2179                                 return false;
2180                         }
2181                         /* Give the module a chance to tidy out all its metadata */
2182                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
2183                         {
2184                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
2185                         }
2186                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
2187                         {
2188                                 modules[j]->OnCleanup(TYPE_USER,u->second);
2189                         }
2190                         FOREACH_MOD OnUnloadModule(modules[j],module_names[j]);
2191                         // found the module
2192                         log(DEBUG,"Deleting module...");
2193                         erase_module(j);
2194                         log(DEBUG,"Erasing module entry...");
2195                         erase_factory(j);
2196                         log(DEBUG,"Removing dependent commands...");
2197                         removecommands(filename);
2198                         log(DEFAULT,"Module %s unloaded",filename);
2199                         MODCOUNT--;
2200                         return true;
2201                 }
2202         }
2203         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
2204         snprintf(MODERR,MAXBUF,"Module not loaded");
2205         return false;
2206 }
2207
2208 bool LoadModule(const char* filename)
2209 {
2210         char modfile[MAXBUF];
2211 #ifdef STATIC_LINK
2212         snprintf(modfile,MAXBUF,"%s",filename);
2213 #else
2214         snprintf(modfile,MAXBUF,"%s/%s",ModPath,filename);
2215 #endif
2216         std::string filename_str = filename;
2217 #ifndef STATIC_LINK
2218         if (!DirValid(modfile))
2219         {
2220                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
2221                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
2222                 return false;
2223         }
2224 #endif
2225         log(DEBUG,"Loading module: %s",modfile);
2226 #ifndef STATIC_LINK
2227         if (FileExists(modfile))
2228         {
2229 #endif
2230                 for (unsigned int j = 0; j < module_names.size(); j++)
2231                 {
2232                         if (module_names[j] == filename_str)
2233                         {
2234                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
2235                                 snprintf(MODERR,MAXBUF,"Module already loaded");
2236                                 return false;
2237                         }
2238                 }
2239                 ircd_module* a = new ircd_module(modfile);
2240                 factory[MODCOUNT+1] = a;
2241                 if (factory[MODCOUNT+1]->LastError())
2242                 {
2243                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
2244                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
2245                         MODCOUNT--;
2246                         return false;
2247                 }
2248                 if (factory[MODCOUNT+1]->factory)
2249                 {
2250                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
2251                         modules[MODCOUNT+1] = m;
2252                         /* save the module and the module's classfactory, if
2253                          * this isnt done, random crashes can occur :/ */
2254                         module_names.push_back(filename);
2255                 }
2256                 else
2257                 {
2258                         log(DEFAULT,"Unable to load %s",modfile);
2259                         snprintf(MODERR,MAXBUF,"Factory function failed!");
2260                         return false;
2261                 }
2262 #ifndef STATIC_LINK
2263         }
2264         else
2265         {
2266                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
2267                 snprintf(MODERR,MAXBUF,"Module file could not be found");
2268                 return false;
2269         }
2270 #endif
2271         MODCOUNT++;
2272         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
2273         return true;
2274 }
2275
2276 int BindPorts()
2277 {
2278         int clientportcount = 0;
2279         for (int count = 0; count < ConfValueEnum("bind",&config_f); count++)
2280         {
2281                 ConfValue("bind","port",count,configToken,&config_f);
2282                 ConfValue("bind","address",count,Addr,&config_f);
2283                 ConfValue("bind","type",count,Type,&config_f);
2284                 if (strcmp(Type,"servers"))
2285                 {
2286                         // modules handle server bind types now,
2287                         // its not a typo in the strcmp.
2288                         ports[clientportcount] = atoi(configToken);
2289                         strlcpy(addrs[clientportcount],Addr,256);
2290                         clientportcount++;
2291                         log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
2292                 }
2293         }
2294         portCount = clientportcount;
2295
2296         for (int count = 0; count < portCount; count++)
2297         {
2298                 if ((openSockfd[boundPortCount] = OpenTCPSocket()) == ERROR)
2299                 {
2300                         log(DEBUG,"InspIRCd: startup: bad fd %lu",(unsigned long)openSockfd[boundPortCount]);
2301                         return(ERROR);
2302                 }
2303                 if (BindSocket(openSockfd[boundPortCount],client,server,ports[count],addrs[count]) == ERROR)
2304                 {
2305                         log(DEFAULT,"InspIRCd: startup: failed to bind port %lu",(unsigned long)ports[count]);
2306                 }
2307                 else    /* well we at least bound to one socket so we'll continue */
2308                 {
2309                         boundPortCount++;
2310                 }
2311         }
2312
2313         /* if we didn't bind to anything then abort */
2314         if (!boundPortCount)
2315         {
2316                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
2317                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)portCount);
2318                 return (ERROR);
2319         }
2320
2321         return boundPortCount;
2322 }
2323
2324 int InspIRCd(char** argv, int argc)
2325 {
2326         bool expire_run = false;
2327         std::vector<int> activefds;
2328         int incomingSockfd;
2329         int in_port;
2330         userrec* cu = NULL;
2331         InspSocket* s = NULL;
2332         InspSocket* s_del = NULL;
2333         char* target;
2334         unsigned int numberactive;
2335         sockaddr_in sock_us;     // our port number
2336         socklen_t uslen;         // length of our port number
2337
2338         /* Beta 7 moved all this stuff out of the main function
2339          * into smaller sub-functions, much tidier -- Brain
2340          */
2341         OpenLog(argv, argc);
2342         CheckRoot();
2343         SetupCommandTable();
2344         ReadConfig(true,NULL);
2345         AddServerName(ServerName);
2346         CheckDie();
2347         boundPortCount = BindPorts();
2348
2349         printf("\n");
2350         startup_time = time(NULL);
2351
2352         char PID[MAXBUF];
2353         ConfValue("pid","file",0,PID,&config_f);
2354         // write once here, to try it out and make sure its ok
2355         WritePID(PID);
2356
2357         if (!nofork)
2358         {
2359                 if (DaemonSeed() == ERROR)
2360                 {
2361                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
2362                         Exit(ERROR);
2363                 }
2364         }
2365
2366         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
2367          * initialize the socket engine.
2368          */
2369         SE = new SocketEngine();
2370
2371         /* We must load the modules AFTER initializing the socket engine, now */
2372         LoadAllModules();
2373
2374         printf("\nInspIRCd is now running!\n");
2375         if (!nofork)
2376         {
2377                 freopen("/dev/null","w",stdout);
2378                 freopen("/dev/null","w",stderr);
2379         }
2380
2381         /* Add the listening sockets used for client inbound connections
2382          * to the socket engine
2383          */
2384         for (int count = 0; count < portCount; count++)
2385                 SE->AddFd(openSockfd[count],true,X_LISTEN);
2386
2387         WritePID(PID);
2388
2389         /* main loop, this never returns */
2390         for (;;)
2391         {
2392                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
2393                  * Once per loop iteration is pleanty.
2394                  */
2395                 OLDTIME = TIME;
2396                 TIME = time(NULL);
2397
2398                 /* Run background module timers every few seconds
2399                  * (the docs say modules shouldnt rely on accurate
2400                  * timing using this event, so we dont have to
2401                  * time this exactly).
2402                  */
2403                 if (((TIME % 8) == 0) && (!expire_run))
2404                 {
2405                         expire_lines();
2406                         FOREACH_MOD OnBackgroundTimer(TIME);
2407                         expire_run = true;
2408                         continue;
2409                 }
2410                 if ((TIME % 8) == 1)
2411                         expire_run = false;
2412
2413                 /* Once a second, do the background processing */
2414                 if (TIME != OLDTIME)
2415                         while (DoBackgroundUserStuff(TIME));
2416
2417                 /* Call the socket engine to wait on the active
2418                  * file descriptors. The socket engine has everything's
2419                  * descriptors in its list... dns, modules, users,
2420                  * servers... so its nice and easy, just one call.
2421                  */
2422                 SE->Wait(activefds);
2423
2424                 /**
2425                  * Now process each of the fd's. For users, we have a fast
2426                  * lookup table which can find a user by file descriptor, so
2427                  * processing them by fd isnt expensive. If we have a lot of
2428                  * listening ports or module sockets though, things could get
2429                  * ugly.
2430                  */
2431                 numberactive = activefds.size();
2432                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
2433                 {
2434                         int socket_type = SE->GetType(activefds[activefd]);
2435                         switch (socket_type)
2436                         {
2437                                 case X_ESTAB_CLIENT:
2438
2439                                         cu = fd_ref_table[activefds[activefd]];
2440                                         if (cu)
2441                                                 ProcessUser(cu);
2442
2443                                 break;
2444
2445                                 case X_ESTAB_MODULE:
2446
2447                                         /* Process module-owned sockets.
2448                                          * Modules are encouraged to inherit their sockets from
2449                                          * InspSocket so we can process them neatly like this.
2450                                          */
2451                                         s = socket_ref[activefds[activefd]];
2452
2453                                         if ((s) && (!s->Poll()))
2454                                         {
2455                                                 log(DEBUG,"Socket poll returned false, close and bail");
2456                                                 SE->DelFd(s->GetFd());
2457                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
2458                                                 {
2459                                                         s_del = (InspSocket*)*a;
2460                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
2461                                                         {
2462                                                                 module_sockets.erase(a);
2463                                                                 break;
2464                                                         }
2465                                                 }
2466                                                 s->Close();
2467                                                 delete s;
2468                                         }
2469
2470                                 break;
2471
2472                                 case X_ESTAB_DNS:
2473
2474                                         /* When we are using single-threaded dns,
2475                                          * the sockets for dns end up in our mainloop.
2476                                          * When we are using multi-threaded dns,
2477                                          * each thread has its own basic poll() loop
2478                                          * within it, making them 'fire and forget'
2479                                          * and independent of the mainloop.
2480                                          */
2481 #ifndef THREADED_DNS
2482                                         dns_poll(activefds[activefd]);
2483 #endif
2484                                 break;
2485
2486                                 case X_LISTEN:
2487
2488                                         /* It's a listener */
2489                                         uslen = sizeof(sock_us);
2490                                         length = sizeof(client);
2491                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
2492                                         if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen))
2493                                         {
2494                                                 in_port = ntohs(sock_us.sin_port);
2495                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
2496                                                 target = (char*)inet_ntoa(client.sin_addr);
2497                                                 /* Years and years ago, we used to resolve here
2498                                                  * using gethostbyaddr(). That is sucky and we
2499                                                  * don't do that any more...
2500                                                  */
2501                                                 if (incomingSockfd >= 0)
2502                                                 {
2503                                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, target, in_port);
2504                                                         statsAccept++;
2505                                                         AddClient(incomingSockfd, target, in_port, false, target);
2506                                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
2507                                                 }
2508                                                 else
2509                                                 {
2510                                                         WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target);
2511                                                         log(DEBUG,"accept failed: %lu",(unsigned long)in_port);
2512                                                         statsRefused++;
2513                                                 }
2514                                         }
2515                                         else
2516                                         {
2517                                                 log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd);
2518                                                 shutdown(incomingSockfd,2);
2519                                                 close(incomingSockfd);
2520                                         }
2521                                 break;
2522
2523                                 default:
2524                                         /* Something went wrong if we're in here.
2525                                          * In fact, so wrong, im not quite sure
2526                                          * what we would do, so for now, its going
2527                                          * to safely do bugger all.
2528                                          */
2529                                 break;
2530                         }
2531                 }
2532
2533         }
2534         /* This is never reached -- we hope! */
2535         return 0;
2536 }
2537