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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2006 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.
*
* ---------------------------------------------------
*/
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 <time.h>
#include <string>
#ifdef GCC3
#include <ext/hash_map>
#else
#include <hash_map>
#endif
#include <map>
#include <sstream>
#include <vector>
#include <deque>
#include "users.h"
#include "ctables.h"
#include "globals.h"
#include "modules.h"
#include "dynamic.h"
#include "wildcard.h"
#include "message.h"
#include "commands.h"
#include "xline.h"
#include "inspstring.h"
#include "inspircd.h"
#include "helperfuncs.h"
#include "hashcomp.h"
#include "typedefs.h"
#include "cull_list.h"
extern InspIRCd* ServerInstance;
extern user_hash clientlist;
bool CullList::IsValid(userrec* user)
{
time_t esignon = 0;
std::map<userrec*,time_t>::iterator es = exempt.find(user);
if (es != exempt.end())
esignon = es->second;
for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
{
/*
* BUGFIX
*
* Because there is an undetermined period of time between a user existing,
* and this function being called, we have to check for the following condition:
*
* Between CullList::AddItem(u) being called, and CullList::IsValid(u) being called,
* the user with the pointer u has quit, but only to be REPLACED WITH A NEW USER WHO
* BECAUSE OF ALLOCATION RULES, HAS THE SAME MEMORY ADDRESS! To prevent this, we
* cross reference each pointer to the user's signon time, and if the signon times
* do not match, we return false here to indicate this user is NOT valid as it
* seems to differ from the pointer snapshot we got a few seconds earlier. Should
* prevent a few random crashes during netsplits.
*/
if (user == u->second)
return (u->second->signon == esignon);
}
return false;
}
CullItem::CullItem(userrec* u, std::string &r)
{
this->user = u;
this->reason = r;
}
CullItem::CullItem(userrec* u, const char* r)
{
this->user = u;
this->reason = r;
}
CullItem::~CullItem()
{
}
userrec* CullItem::GetUser()
{
return this->user;
}
std::string& CullItem::GetReason()
{
return this->reason;
}
CullList::CullList()
{
list.clear();
exempt.clear();
}
void CullList::AddItem(userrec* user, std::string &reason)
{
if (exempt.find(user) == exempt.end())
{
CullItem item(user,reason);
list.push_back(item);
exempt[user] = user->signon;
}
}
void CullList::AddItem(userrec* user, const char* reason)
{
if (exempt.find(user) == exempt.end())
{
CullItem item(user,reason);
list.push_back(item);
exempt[user] = user->signon;
}
}
int CullList::Apply()
{
int n = 0;
while (list.size())
{
std::vector<CullItem>::iterator a = list.begin();
userrec* u = a->GetUser();
/* Because ServerInstance->DoOneIteration can
* take the user away from us in the middle of
* our operation, we should check to see if this
* pointer is still valid by iterating the hash.
* It's expensive, yes, but the DoOneIteration
* call stops it being horrendously bad.
*/
if (IsValid(u))
{
kill_link(u,a->GetReason().c_str());
list.erase(list.begin());
/* So that huge numbers of quits dont block,
* we yield back to our mainloop every 15
* iterations.
* The DoOneIteration call basically acts
* like a software threading mechanism.
*/
if (((n++) % 15) == 0)
{
ServerInstance->DoOneIteration(false);
}
}
}
return n;
}
|
