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#ifndef ENGINE_SHARED_NETBAN_H
#define ENGINE_SHARED_NETBAN_H
#include <base/system.h>
inline int NetComp(const NETADDR *pAddr1, const NETADDR *pAddr2)
{
return mem_comp(pAddr1, pAddr2, pAddr1->type==NETTYPE_IPV4 ? 8 : 20);
}
class CNetRange
{
public:
NETADDR m_LB;
NETADDR m_UB;
bool IsValid() const { return m_LB.type == m_UB.type && NetComp(&m_LB, &m_UB) < 0; }
};
inline int NetComp(const CNetRange *pRange1, const CNetRange *pRange2)
{
return NetComp(&pRange1->m_LB, &pRange2->m_LB) || NetComp(&pRange1->m_UB, &pRange2->m_UB);
}
class CNetBan
{
protected:
bool NetMatch(const NETADDR *pAddr1, const NETADDR *pAddr2) const
{
return NetComp(pAddr1, pAddr2) == 0;
}
bool NetMatch(const CNetRange *pRange, const NETADDR *pAddr, int Start, int Length) const
{
return pRange->m_LB.type == pAddr->type && (Start == 0 || mem_comp(&pRange->m_LB.ip[0], &pAddr->ip[0], Start) == 0) &&
mem_comp(&pRange->m_LB.ip[Start], &pAddr->ip[Start], Length-Start) <= 0 && mem_comp(&pRange->m_UB.ip[Start], &pAddr->ip[Start], Length-Start) >= 0;
}
bool NetMatch(const CNetRange *pRange, const NETADDR *pAddr) const
{
return NetMatch(pRange, pAddr, 0, pRange->m_LB.type==NETTYPE_IPV4 ? 4 : 16);
}
const char *NetToString(const NETADDR *pData, char *pBuffer, unsigned BufferSize) const
{
char aAddrStr[NETADDR_MAXSTRSIZE];
net_addr_str(pData, aAddrStr, sizeof(aAddrStr), false);
str_format(pBuffer, BufferSize, "'%s'", aAddrStr);
return pBuffer;
}
const char *NetToString(const CNetRange *pData, char *pBuffer, unsigned BufferSize) const
{
char aAddrStr1[NETADDR_MAXSTRSIZE], aAddrStr2[NETADDR_MAXSTRSIZE];
net_addr_str(&pData->m_LB, aAddrStr1, sizeof(aAddrStr1), false);
net_addr_str(&pData->m_UB, aAddrStr2, sizeof(aAddrStr2), false);
str_format(pBuffer, BufferSize, "'%s' - '%s'", aAddrStr1, aAddrStr2);
return pBuffer;
}
// todo: move?
static bool StrAllnum(const char *pStr);
class CNetHash
{
public:
int m_Hash;
int m_HashIndex; // matching parts for ranges, 0 for addr
CNetHash() {}
CNetHash(const NETADDR *pAddr);
CNetHash(const CNetRange *pRange);
static int MakeHashArray(const NETADDR *pAddr, CNetHash aHash[17]);
};
struct CBanInfo
{
enum
{
EXPIRES_NEVER=-1,
REASON_LENGTH=64,
};
int m_Expires;
char m_aReason[REASON_LENGTH];
};
template<class T> struct CBan
{
T m_Data;
CBanInfo m_Info;
CNetHash m_NetHash;
// hash list
CBan *m_pHashNext;
CBan *m_pHashPrev;
// used or free list
CBan *m_pNext;
CBan *m_pPrev;
};
template<class T, int HashCount> class CBanPool
{
public:
typedef T CDataType;
CBan<CDataType> *Add(const CDataType *pData, const CBanInfo *pInfo, const CNetHash *pNetHash);
int Remove(CBan<CDataType> *pBan);
void Update(CBan<CDataType> *pBan, const CBanInfo *pInfo);
void Reset();
int Num() const { return m_CountUsed; }
bool IsFull() const { return m_CountUsed == MAX_BANS; }
CBan<CDataType> *First() const { return m_pFirstUsed; }
CBan<CDataType> *First(const CNetHash *pNetHash) const { return m_paaHashList[pNetHash->m_HashIndex][pNetHash->m_Hash]; }
CBan<CDataType> *Find(const CDataType *pData, const CNetHash *pNetHash) const
{
for(CBan<CDataType> *pBan = m_paaHashList[pNetHash->m_HashIndex][pNetHash->m_Hash]; pBan; pBan = pBan->m_pHashNext)
{
if(NetComp(&pBan->m_Data, pData) == 0)
return pBan;
}
return 0;
}
CBan<CDataType> *Get(int Index) const;
private:
enum
{
MAX_BANS=1024,
};
CBan<CDataType> *m_paaHashList[HashCount][256];
CBan<CDataType> m_aBans[MAX_BANS];
CBan<CDataType> *m_pFirstFree;
CBan<CDataType> *m_pFirstUsed;
int m_CountUsed;
};
typedef CBanPool<NETADDR, 1> CBanAddrPool;
typedef CBanPool<CNetRange, 16> CBanRangePool;
typedef CBan<NETADDR> CBanAddr;
typedef CBan<CNetRange> CBanRange;
template<class T> void MakeBanInfo(const CBan<T> *pBan, char *pBuf, unsigned BuffSize, int Type) const;
template<class T> int Ban(T *pBanPool, const typename T::CDataType *pData, int Seconds, const char *pReason);
template<class T> int Unban(T *pBanPool, const typename T::CDataType *pData);
class IConsole *m_pConsole;
class IStorage *m_pStorage;
CBanAddrPool m_BanAddrPool;
CBanRangePool m_BanRangePool;
NETADDR m_LocalhostIPV4, m_LocalhostIPV6;
public:
enum
{
MSGTYPE_PLAYER=0,
MSGTYPE_LIST,
MSGTYPE_BANADD,
MSGTYPE_BANREM,
};
class IConsole *Console() const { return m_pConsole; }
class IStorage *Storage() const { return m_pStorage; }
virtual ~CNetBan() {}
void Init(class IConsole *pConsole, class IStorage *pStorage);
void Update();
virtual int BanAddr(const NETADDR *pAddr, int Seconds, const char *pReason);
virtual int BanRange(const CNetRange *pRange, int Seconds, const char *pReason);
int UnbanByAddr(const NETADDR *pAddr);
int UnbanByRange(const CNetRange *pRange);
int UnbanByIndex(int Index);
void UnbanAll() { m_BanAddrPool.Reset(); m_BanRangePool.Reset(); }
bool IsBanned(const NETADDR *pAddr, char *pBuf, unsigned BufferSize) const;
static void ConBan(class IConsole::IResult *pResult, void *pUser);
static void ConBanRange(class IConsole::IResult *pResult, void *pUser);
static void ConUnban(class IConsole::IResult *pResult, void *pUser);
static void ConUnbanRange(class IConsole::IResult *pResult, void *pUser);
static void ConUnbanAll(class IConsole::IResult *pResult, void *pUser);
static void ConBans(class IConsole::IResult *pResult, void *pUser);
static void ConBansSave(class IConsole::IResult *pResult, void *pUser);
};
template<class T>
void CNetBan::MakeBanInfo(const CBan<T> *pBan, char *pBuf, unsigned BuffSize, int Type) const
{
if(pBan == 0 || pBuf == 0)
{
if(BuffSize > 0)
pBuf[0] = 0;
return;
}
// build type based part
char aBuf[256];
if(Type == MSGTYPE_PLAYER)
str_copy(aBuf, "You have been banned", sizeof(aBuf));
else
{
char aTemp[256];
switch(Type)
{
case MSGTYPE_LIST:
str_format(aBuf, sizeof(aBuf), "%s banned", NetToString(&pBan->m_Data, aTemp, sizeof(aTemp))); break;
case MSGTYPE_BANADD:
str_format(aBuf, sizeof(aBuf), "banned %s", NetToString(&pBan->m_Data, aTemp, sizeof(aTemp))); break;
case MSGTYPE_BANREM:
str_format(aBuf, sizeof(aBuf), "unbanned %s", NetToString(&pBan->m_Data, aTemp, sizeof(aTemp))); break;
default:
aBuf[0] = 0;
}
}
// add info part
if(pBan->m_Info.m_Expires != CBanInfo::EXPIRES_NEVER)
{
int Mins = ((pBan->m_Info.m_Expires-time_timestamp()) + 59) / 60;
if(Mins <= 1)
str_format(pBuf, BuffSize, "%s for 1 minute (%s)", aBuf, pBan->m_Info.m_aReason);
else
str_format(pBuf, BuffSize, "%s for %d minutes (%s)", aBuf, Mins, pBan->m_Info.m_aReason);
}
else
str_format(pBuf, BuffSize, "%s for life (%s)", aBuf, pBan->m_Info.m_aReason);
}
#endif
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