427 lines
11 KiB
C++
427 lines
11 KiB
C++
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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rdns.hxx
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Abstract:
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Reverse DNS service
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Author:
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Philippe Choquier (phillich) 5-june-1996
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--*/
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#if !defined(_RDNS_INCLUDE)
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#define _RDNS_INCLUDE
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typedef LPVOID DNSARG;
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typedef void (*DNSFUNC)( DNSARG, BOOL, LPSTR );
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#define RDNS_REQUEST_TYPE_IP2DNS 0
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#define RDNS_REQUEST_TYPE_DNS2IP 1
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#define SIZEOF_IP_ADDRESS (4)
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typedef struct _DNSFUNCDESC
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{
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DWORD dwRequestType;
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DNSFUNC pFunc;
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} DNSFUNCDESC, *PDNSFUNCDESC;
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extern BOOL InitRDns();
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extern void TerminateRDns();
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dllexp
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BOOL
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AsyncHostByAddr(
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PDNSFUNCDESC pFunc, // will store DNS name, post dummy completion status
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// if NULL ( or g_cMaxThreadLimit==0 ) then sync request
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DNSARG pArg, // ptr to be passed to FUNC
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struct sockaddr *pHostAddr,
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BOOL *pfSync, // updated with TRUE if sync call
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LPSTR pName,
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DWORD dwMaxNameLen
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);
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dllexp
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BOOL
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AsyncAddrByHost(
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PDNSFUNCDESC pFunc, // will store DNS name, post dummy completion status
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// if NULL ( or g_cMaxThreadLimit==0 ) then sync request
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DNSARG pArg, // ptr to be passed to FUNC
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struct sockaddr *pHostAddr,
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BOOL *pfSync, // updated with TRUE if sync call
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LPSTR pName
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);
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BOOL
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FireUpNewThread(
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PDNSFUNCDESC pFunc,
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DNSARG pArg,
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LPVOID pOvr
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);
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#define XAR_GRAIN 256
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//
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// extensible array class
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//
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class XAR {
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public:
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XAR() { m_fDidAlloc = FALSE; m_pAlloc = NULL; m_cAlloc = m_cUsed = 0; }
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~XAR() { if ( m_fDidAlloc ) LocalFree( m_pAlloc ); }
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BOOL Init( LPBYTE p=NULL, DWORD c=0) { m_fDidAlloc = FALSE; m_pAlloc = p; m_cAlloc = m_cUsed = c; return TRUE; }
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VOID Terminate()
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{
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if ( m_fDidAlloc )
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{
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LocalFree( m_pAlloc );
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}
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m_fDidAlloc = FALSE;
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m_pAlloc = NULL;
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m_cAlloc = m_cUsed = 0;
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}
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BOOL Resize( DWORD dwDelta );
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DWORD GetUsed() { return m_cUsed; }
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VOID SetUsed( DWORD c ) { m_cUsed = c; }
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VOID AdjustUsed( int c ) { m_cUsed += (DWORD)c; }
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LPBYTE GetAlloc() { return m_pAlloc; }
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private:
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LPBYTE m_pAlloc;
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DWORD m_cAlloc;
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DWORD m_cUsed;
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BOOL m_fDidAlloc;
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} ;
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//
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// This type defines a relocatable index inside a dynamic array.
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// to allow easy fixups when part of the array is to be extended/shrinked
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// index are identified by setting bit 31 to 1. Other DWORD in the reference
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// part of the array are assumed to have bit 31 set to 0.
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// The size of the reference part of the array is defined by cRefSize
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//
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typedef DWORD SELFREFINDEX;
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// combine array base address with SELFREFINDEX
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#define MAKEPTR(a,b) ((LPBYTE)(a)+((b)&0x7fffffff))
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// build a SELFREFINDEX from an offset in array
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#define MAKEREF(a) ((a)|0x80000000)
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// build an offset from a SELFREFINDEX
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#define MAKEOFFSET(a) ((a)&0x7fffffff)
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//
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// ADDRESS_CHECK_LIST Flags. bit31 must not be used.
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//
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#define RDNS_FLAG_DODNS2IPCHECK 0x00000001
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// uses non-standard extension : zero-sized array in struct
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#pragma warning(disable:4200)
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// array header
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typedef struct _ADDRESS_CHECK_LIST {
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SELFREFINDEX iDenyAddr; // address deny list
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// points to ADDRESS_HEADER
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SELFREFINDEX iGrantAddr; // address grant list
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// points to ADDRESS_HEADER
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SELFREFINDEX iDenyName; // DNS name deny list
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// points to NAME_HEADER
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SELFREFINDEX iGrantName; // DNS name grant list
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// points to NAME_HEADER
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DWORD dwFlags;
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DWORD cRefSize; // size of reference area ( in bytes )
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} ADDRESS_CHECK_LIST, *PADDRESS_CHECK_LIST;
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typedef struct _ADDRESS_LIST_ENTRY {
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DWORD iFamily;
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DWORD cAddresses;
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DWORD cFullBytes;
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DWORD LastByte;
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SELFREFINDEX iFirstAddress; // points to array of addresses
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// which size are derived from iFamily
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} ADDRESS_LIST_ENTRY, *PADDRESS_LIST_ENTRY;
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typedef struct _ADDRESS_HEADER {
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DWORD cEntries; // # of Entries[]
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DWORD cAddresses; // total # of addresses in all
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// ADDRESS_LIST_ENTRY
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ADDRESS_LIST_ENTRY Entries[];
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} ADDRESS_HEADER, *PADDRESS_HEADER ;
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typedef struct _NAME_LIST_ENTRY {
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DWORD cComponents; // # of DNS components
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DWORD cNames;
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SELFREFINDEX iName[]; // array of references to DNS names
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} NAME_LIST_ENTRY, *PNAME_LIST_ENTRY;
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typedef struct _NAME_HEADER {
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DWORD cEntries;
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DWORD cNames; // total # of names for all Entries[]
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//NAME_LIST_ENTRY Entries[0]; // array of name classes
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} NAME_HEADER, *PNAME_HEADER ;
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typedef struct ADDRCMPDESC {
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LPBYTE pMask;
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UINT cFullBytes;
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UINT LastByte;
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UINT cSizeAddress;
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} ADDRCMPDESC, *PADDRCMPDESC;
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typedef struct NAMECMPDESC {
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LPVOID pName;
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LPBYTE pBase;
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} NAMECMPDESC, *PNAMECMPDESC;
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typedef LPVOID ADDRCHECKARG;
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typedef void (*ADDRCHECKFUNC)(ADDRCHECKARG, BOOL );
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typedef void (*ADDRCHECKFUNCEX)(ADDRCHECKARG, BOOL, LPSTR );
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typedef int (__cdecl *CMPFUNC)(const void*, const void*, LPVOID);
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#define SIZE_FAST_REVERSE_DNS 128
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enum AC_RESULT {
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AC_NOT_CHECKED,
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AC_IN_DENY_LIST,
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AC_NOT_IN_DENY_LIST, // deny list present but not in deny list
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AC_IN_GRANT_LIST,
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AC_NOT_IN_GRANT_LIST, // grant list present but not in grant list
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AC_NO_LIST
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} ;
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#define DNSLIST_FLAG_NOSUBDOMAIN 0x80000000
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#define DNSLIST_FLAGS 0x80000000 // bitmask of all flags
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class ADDRESS_CHECK {
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public:
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dllexp ADDRESS_CHECK()
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{
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m_pszDnsName = NULL;
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}
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dllexp ~ADDRESS_CHECK()
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{
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if ( m_pszDnsName != NULL )
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{
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LocalFree( m_pszDnsName );
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m_pszDnsName = NULL;
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}
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}
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//
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dllexp BOOL BindCheckList( LPBYTE p = NULL, DWORD c = 0 );
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dllexp VOID UnbindCheckList() { m_Storage.Terminate(); }
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dllexp BOOL BindAddr( struct sockaddr* pAddr )
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{
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m_pAddr = pAddr;
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m_fDnsResolved = FALSE;
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m_fIpResolved = FALSE;
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m_dwErrorResolving = 0;
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return TRUE;
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}
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dllexp VOID UnbindAddr()
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{
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m_pAddr = NULL;
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m_fDnsResolved = FALSE;
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}
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dllexp XAR* GetStorage() { return &m_Storage; }
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dllexp AC_RESULT CheckAccess(
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LPBOOL pfSync,
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ADDRCHECKFUNC pFunc,
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ADDRCHECKARG pArg
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);
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//
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void AdjustRefs( LPBYTE, DWORD dwCut, DWORD dwAdj );
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//
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UINT GetAddrSize( DWORD );
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VOID MakeAcd( PADDRCMPDESC pacd, LPBYTE pMask, UINT cLen );
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// for UI, addr
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dllexp BOOL AddAddr( BOOL fGrant, DWORD dwFamily, LPBYTE pMask, LPBYTE pAddr );
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dllexp BOOL DeleteAddr( BOOL fGrant, DWORD iIndex );
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dllexp BOOL GetAddr( BOOL fGrant, DWORD iIndex, LPDWORD pdwFamily, LPBYTE* pMask, LPBYTE* pAddr );
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dllexp DWORD GetNbAddr( BOOL fGrant );
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BOOL LocateAddr( BOOL fGrant, DWORD iIndex, PADDRESS_HEADER* ppHd, PADDRESS_LIST_ENTRY* pHeader, LPDWORD iIndexInHeader );
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dllexp BOOL DeleteAllAddr( BOOL fGrant );
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dllexp BOOL SetFlag( DWORD dwFlag, BOOL fEnable );
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dllexp DWORD GetFlags();
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// test all mask for this family, do bsearch on each
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BOOL IsMatchAddr( BOOL fGrant, DWORD dwFamily, LPBYTE pAddr );
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AC_RESULT CheckAddress(
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struct sockaddr* pAddr
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);
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dllexp BOOL QueryDnsName(
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LPBOOL pfSync,
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ADDRCHECKFUNCEX pFunc,
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ADDRCHECKARG pArg,
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LPSTR * ppName
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);
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dllexp AC_RESULT CheckIpAccess( LPBOOL pfNeedDns);
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dllexp AC_RESULT CheckDnsAccess()
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{ return CheckName( m_pszDnsName ); }
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dllexp BOOL IsDnsResolved()
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{ return m_fDnsResolved; }
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dllexp LPSTR QueryResolvedDnsName()
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{ return m_pszDnsName; }
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dllexp DWORD QueryErrorResolving()
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{ return m_dwErrorResolving; }
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// for UI, name
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dllexp BOOL AddName( BOOL fGrant, LPSTR pName, DWORD dwFlags = 0 );
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BOOL AddReversedName( BOOL fGrant, LPSTR pName );
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dllexp BOOL DeleteName( BOOL fGrant, DWORD iIndex );
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dllexp BOOL GetName( BOOL fGrant, DWORD iIndex, LPSTR* ppName, LPDWORD pdwFlags = NULL );
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BOOL GetReversedName( BOOL fGrant, DWORD iIndex, LPSTR pName, LPDWORD pdwSize );
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dllexp DWORD GetNbName( BOOL fGrant );
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BOOL LocateName( BOOL fGrant, DWORD iIndex, PNAME_HEADER* ppHd, PNAME_LIST_ENTRY* pHeader, LPDWORD iIndexInHeader );
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dllexp BOOL DeleteAllName( BOOL fGrant );
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dllexp DWORD QueryCheckListSize() { return m_Storage.GetUsed(); }
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dllexp LPBYTE QueryCheckListPtr() { return m_Storage.GetAlloc(); }
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UINT GetNbComponent( LPSTR pName );
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// test all classes, do bsearch on each
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BOOL IsMatchName( BOOL fGrant, LPSTR pName );
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BOOL CheckReversedName( LPSTR pName ); // synchronous version
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dllexp AC_RESULT CheckName( LPSTR pName ); // synchronous version
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LPSTR InitReverse( LPSTR pR, LPSTR pTarget, LPBOOL pfAlloc );
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VOID TerminateReverse( LPSTR, BOOL );
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VOID AddrCheckDnsCallBack(
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BOOL fSt,
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LPSTR pDns
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);
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VOID AddrCheckDnsCallBack2(
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BOOL fSt,
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struct sockaddr* pAddr
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);
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VOID AddrCheckDnsCallBack3(
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BOOL fSt,
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struct sockaddr* pAddr
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);
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VOID ResolveDnsCallBack(
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BOOL fSt,
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LPSTR pDns
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);
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#if DBG
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VOID DumpAddrAndName( VOID );
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VOID DumpAddr( BOOL );
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VOID DumpName( BOOL );
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#endif
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private:
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XAR m_Storage;
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struct sockaddr * m_pAddr;
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struct sockaddr m_ResolvedAddr;
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LPSTR m_pszDnsName;
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BOOL m_fDnsResolved;
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BOOL m_fIpResolved;
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DWORD m_dwErrorResolving;
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ADDRCHECKFUNC m_HttpReqCallback;
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ADDRCHECKFUNCEX m_HttpReqCallbackEx;
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ADDRCHECKARG m_HttpReqParam;
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} ;
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typedef struct _SID_CACHE_ENTRY
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{
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DWORD tExpire; // now + TTL
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DWORD dwSidLen;
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BYTE Sid[0];
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} SID_CACHE_ENTRY, *PSID_CACHE_ENTRY;
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class CSidCache
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{
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public:
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CSidCache() {}
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~CSidCache() {}
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//
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BOOL Init();
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VOID Terminate();
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//
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dllexp BOOL AddToCache( PSID, DWORD dwTTL ); // TTL in seconds
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dllexp BOOL IsInCache( PSID );
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dllexp BOOL CheckPresentAndResetTtl( PSID, DWORD );
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//
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BOOL Scavenger();
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private:
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XAR xaStore; // buffer of SID_CACHE_ENTRY
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CRITICAL_SECTION csLock;
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} ;
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//
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// PEN : Password Expiration Notification API
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//
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extern CSidCache g_scPen;
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dllexp BOOL PenAddToCache( PSID, DWORD );
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dllexp BOOL PenIsInCache( PSID );
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dllexp BOOL PenCheckPresentAndResetTtl( PSID, DWORD );
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#define PEN_TTL (10*60) // in seconds
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#if DBG
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extern VOID TestAPI();
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#endif
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#if defined(_RDNS_STANDALONE)
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typedef
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VOID
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(* PFN_SCHED_CALLBACK)(
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VOID * pContext
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);
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dllexp
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DWORD
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ScheduleWorkItem(
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PFN_SCHED_CALLBACK pfnCallback,
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PVOID pContext,
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DWORD msecTimeInterval,
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BOOL fPeriodic = FALSE
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)
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{
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return 0;
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}
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dllexp
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BOOL
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RemoveWorkItem(
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DWORD pdwCookie
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)
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{
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return FALSE;
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}
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#endif
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#endif
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