/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * Inspire is copyright (C) 2002-2005 ChatSpike-Dev. * E-mail: * * * * Written by Craig Edwards, Craig McLure, and others. * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ /* Now with added unF! ;) */ using namespace std; #include "inspircd_config.h" #include "inspircd.h" #include "inspircd_io.h" #include #include #include #include #include #include #include #ifdef GCC3 #include #else #include #endif #include #include #include #include #include #ifdef THREADED_DNS #include #endif #include "users.h" #include "ctables.h" #include "globals.h" #include "modules.h" #include "dynamic.h" #include "wildcard.h" #include "message.h" #include "mode.h" #include "commands.h" #include "xline.h" #include "inspstring.h" #include "dnsqueue.h" #include "helperfuncs.h" #include "hashcomp.h" #include "socketengine.h" #include "userprocess.h" #include "socket.h" #include "dns.h" #include "typedefs.h" #include "command_parse.h" InspIRCd* ServerInstance; int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale' int WHOWAS_MAX = 100; // default 100 people maximum in the WHOWAS list extern std::vector modules; extern std::vector factory; std::vector module_sockets; std::vector local_users; extern int MODCOUNT; int openSockfd[MAXSOCKS]; sockaddr_in client,server; socklen_t length; extern Module* IOHookModule; extern InspSocket* socket_ref[65535]; time_t TIME = time(NULL), OLDTIME = time(NULL); SocketEngine* SE = NULL; // This table references users by file descriptor. // its an array to make it VERY fast, as all lookups are referenced // by an integer, meaning there is no need for a scan/search operation. userrec* fd_ref_table[65536]; serverstats* stats = new serverstats; Server* MyServer = new Server; ServerConfig *Config = new ServerConfig; CommandParser *Parser = NULL; user_hash clientlist; chan_hash chanlist; whowas_hash whowas; servernamelist servernames; char lowermap[255]; void AddServerName(std::string servername) { log(DEBUG,"Adding server name: %s",servername.c_str()); for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++) { if (*a == servername) return; } servernames.push_back(servername); } const char* FindServerNamePtr(std::string servername) { for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++) { if (*a == servername) return a->c_str(); } AddServerName(servername); return FindServerNamePtr(servername); } std::string InspIRCd::GetRevision() { /* w00t got me to replace a bunch of strtok_r * with something nicer, so i did this. Its the * same thing really, only in C++. It places the * text into a std::stringstream which is a readable * and writeable buffer stream, and then pops two * words off it, space delimited. Because it reads * into the same variable twice, the first word * is discarded, and the second one returned. */ std::stringstream Revision("$Revision$"); std::string single; Revision >> single >> single; return single; } InspIRCd::InspIRCd(int argc, char** argv) { Start(); module_sockets.clear(); this->startup_time = time(NULL); srand(time(NULL)); log(DEBUG,"*** InspIRCd starting up!"); if (!FileExists(CONFIG_FILE)) { printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE); log(DEFAULT,"main: no config"); printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n"); Exit(ERROR); } if (argc > 1) { for (int i = 1; i < argc; i++) { if (!strcmp(argv[i],"-nofork")) { Config->nofork = true; } if (!strcmp(argv[i],"-wait")) { sleep(6); } if (!strcmp(argv[i],"-nolimit")) { Config->unlimitcore = true; } } } strlcpy(Config->MyExecutable,argv[0],MAXBUF); // initialize the lowercase mapping table for (unsigned int cn = 0; cn < 256; cn++) lowermap[cn] = cn; // lowercase the uppercase chars for (unsigned int cn = 65; cn < 91; cn++) lowermap[cn] = tolower(cn); // now replace the specific chars for scandanavian comparison lowermap[(unsigned)'['] = '{'; lowermap[(unsigned)']'] = '}'; lowermap[(unsigned)'\\'] = '|'; OpenLog(argv, argc); Config->ClearStack(); Config->Read(true,NULL); CheckRoot(); Parser = new CommandParser(); AddServerName(Config->ServerName); CheckDie(); stats->BoundPortCount = BindPorts(); printf("\n"); if (!Config->nofork) { if (DaemonSeed() == ERROR) { printf("ERROR: could not go into daemon mode. Shutting down.\n"); Exit(ERROR); } } /* Because of limitations in kqueue on freebsd, we must fork BEFORE we * initialize the socket engine. */ SE = new SocketEngine(); /* We must load the modules AFTER initializing the socket engine, now */ LoadAllModules(); printf("\nInspIRCd is now running!\n"); return; } std::string InspIRCd::GetVersionString() { char versiondata[MAXBUF]; #ifdef THREADED_DNS char dnsengine[] = "multithread"; #else char dnsengine[] = "singlethread"; #endif snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,GetRevision().c_str(),Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine); return versiondata; } char* InspIRCd::ModuleError() { return MODERR; } void InspIRCd::erase_factory(int j) { int v = 0; for (std::vector::iterator t = factory.begin(); t != factory.end(); t++) { if (v == j) { factory.erase(t); factory.push_back(NULL); return; } v++; } } void InspIRCd::erase_module(int j) { int v1 = 0; for (std::vector::iterator m = modules.begin(); m!= modules.end(); m++) { if (v1 == j) { delete *m; modules.erase(m); modules.push_back(NULL); break; } v1++; } int v2 = 0; for (std::vector::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++) { if (v2 == j) { Config->module_names.erase(v); break; } v2++; } } bool InspIRCd::UnloadModule(const char* filename) { std::string filename_str = filename; for (unsigned int j = 0; j != Config->module_names.size(); j++) { if (Config->module_names[j] == filename_str) { if (modules[j]->GetVersion().Flags & VF_STATIC) { log(DEFAULT,"Failed to unload STATIC module %s",filename); snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)"); return false; } /* Give the module a chance to tidy out all its metadata */ for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++) { modules[j]->OnCleanup(TYPE_CHANNEL,c->second); } for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++) { modules[j]->OnCleanup(TYPE_USER,u->second); } FOREACH_MOD OnUnloadModule(modules[j],Config->module_names[j]); // found the module log(DEBUG,"Deleting module..."); erase_module(j); log(DEBUG,"Erasing module entry..."); erase_factory(j); log(DEBUG,"Removing dependent commands..."); Parser->RemoveCommands(filename); log(DEFAULT,"Module %s unloaded",filename); MODCOUNT--; return true; } } log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename); snprintf(MODERR,MAXBUF,"Module not loaded"); return false; } bool InspIRCd::LoadModule(const char* filename) { char modfile[MAXBUF]; #ifdef STATIC_LINK snprintf(modfile,MAXBUF,"%s",filename); #else snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename); #endif std::string filename_str = filename; #ifndef STATIC_LINK if (!DirValid(modfile)) { log(DEFAULT,"Module %s is not within the modules directory.",modfile); snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile); return false; } #endif log(DEBUG,"Loading module: %s",modfile); #ifndef STATIC_LINK if (FileExists(modfile)) { #endif for (unsigned int j = 0; j < Config->module_names.size(); j++) { if (Config->module_names[j] == filename_str) { log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile); snprintf(MODERR,MAXBUF,"Module already loaded"); return false; } } ircd_module* a = new ircd_module(modfile); factory[MODCOUNT+1] = a; if (factory[MODCOUNT+1]->LastError()) { log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError()); snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError()); MODCOUNT--; return false; } if (factory[MODCOUNT+1]->factory) { Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer); modules[MODCOUNT+1] = m; /* save the module and the module's classfactory, if * this isnt done, random crashes can occur :/ */ Config->module_names.push_back(filename); } else { log(DEFAULT,"Unable to load %s",modfile); snprintf(MODERR,MAXBUF,"Factory function failed!"); return false; } #ifndef STATIC_LINK } else { log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile); snprintf(MODERR,MAXBUF,"Module file could not be found"); return false; } #endif MODCOUNT++; FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str); return true; } int InspIRCd::Run() { bool expire_run = false; std::vector activefds; int incomingSockfd; int in_port; userrec* cu = NULL; InspSocket* s = NULL; InspSocket* s_del = NULL; char* target; unsigned int numberactive; sockaddr_in sock_us; // our port number socklen_t uslen; // length of our port number if (!Config->nofork) { freopen("/dev/null","w",stdout); freopen("/dev/null","w",stderr); } /* Add the listening sockets used for client inbound connections * to the socket engine */ for (int count = 0; count < stats->BoundPortCount; count++) SE->AddFd(openSockfd[count],true,X_LISTEN); WritePID(Config->PID); /* main loop, this never returns */ for (;;) { /* time() seems to be a pretty expensive syscall, so avoid calling it too much. * Once per loop iteration is pleanty. */ OLDTIME = TIME; TIME = time(NULL); /* Run background module timers every few seconds * (the docs say modules shouldnt rely on accurate * timing using this event, so we dont have to * time this exactly). */ if (((TIME % 8) == 0) && (!expire_run)) { expire_lines(); FOREACH_MOD OnBackgroundTimer(TIME); expire_run = true; continue; } if ((TIME % 8) == 1) expire_run = false; /* Once a second, do the background processing */ if (TIME != OLDTIME) while (DoBackgroundUserStuff(TIME)); /* Call the socket engine to wait on the active * file descriptors. The socket engine has everything's * descriptors in its list... dns, modules, users, * servers... so its nice and easy, just one call. */ SE->Wait(activefds); /** * Now process each of the fd's. For users, we have a fast * lookup table which can find a user by file descriptor, so * processing them by fd isnt expensive. If we have a lot of * listening ports or module sockets though, things could get * ugly. */ numberactive = activefds.size(); for (unsigned int activefd = 0; activefd < numberactive; activefd++) { int socket_type = SE->GetType(activefds[activefd]); switch (socket_type) { case X_ESTAB_CLIENT: cu = fd_ref_table[activefds[activefd]]; if (cu) ProcessUser(cu); break; case X_ESTAB_MODULE: /* Process module-owned sockets. * Modules are encouraged to inherit their sockets from * InspSocket so we can process them neatly like this. */ s = socket_ref[activefds[activefd]]; if ((s) && (!s->Poll())) { log(DEBUG,"Socket poll returned false, close and bail"); SE->DelFd(s->GetFd()); for (std::vector::iterator a = module_sockets.begin(); a < module_sockets.end(); a++) { s_del = (InspSocket*)*a; if ((s_del) && (s_del->GetFd() == activefds[activefd])) { module_sockets.erase(a); break; } } s->Close(); delete s; } break; case X_ESTAB_DNS: /* When we are using single-threaded dns, * the sockets for dns end up in our mainloop. * When we are using multi-threaded dns, * each thread has its own basic poll() loop * within it, making them 'fire and forget' * and independent of the mainloop. */ #ifndef THREADED_DNS dns_poll(activefds[activefd]); #endif break; case X_LISTEN: /* It's a listener */ uslen = sizeof(sock_us); length = sizeof(client); incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length); if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen)) { in_port = ntohs(sock_us.sin_port); log(DEBUG,"Accepted socket %d",incomingSockfd); target = (char*)inet_ntoa(client.sin_addr); /* Years and years ago, we used to resolve here * using gethostbyaddr(). That is sucky and we * don't do that any more... */ if (incomingSockfd >= 0) { if (IOHookModule) { IOHookModule->OnRawSocketAccept(incomingSockfd, target, in_port); } stats->statsAccept++; AddClient(incomingSockfd, target, in_port, false, target); log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd); } else { WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target); log(DEBUG,"accept failed: %lu",(unsigned long)in_port); stats->statsRefused++; } } else { log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd); shutdown(incomingSockfd,2); close(incomingSockfd); } break; default: /* Something went wrong if we're in here. * In fact, so wrong, im not quite sure * what we would do, so for now, its going * to safely do bugger all. */ break; } } } /* This is never reached -- we hope! */ return 0; } /**********************************************************************************/ /** * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*. */ int main(int argc, char** argv) { ServerInstance = new InspIRCd(argc, argv); ServerInstance->Run(); delete ServerInstance; return 0; }