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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* Inspire is copyright (C) 2002-2005 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* 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 <unistd.h>
#include <fcntl.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/utsname.h>
#include <time.h>
#include <string>
#ifdef GCC3
#include <ext/hash_map>
#else
#include <hash_map>
#endif
#include <map>
#include <sstream>
#include <vector>
#include <deque>
#include <sched.h>
#ifdef THREADED_DNS
#include <pthread.h>
#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<Module*> modules;
extern std::vector<ircd_module*> factory;
std::vector<InspSocket*> module_sockets;
std::vector<userrec*> 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 = new CommandParser;
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();
SetupCommandTable();
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<ircd_module*>::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<Module*>::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<std::string>::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...");
remove_commands(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<int> 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<InspSocket*>::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;
}
|