133 lines
2.4 KiB
C++
133 lines
2.4 KiB
C++
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/*++
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Copyright (C) Microsoft Corporation, 1997 - 1999
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Module Name:
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ipname.hxx
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Abstract:
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Header file for IP name resolution routines.
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Author:
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Gopal Parupudi <GopalP>
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Notes:
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a. Class IP_ADDRESS_RESOLVER cloned from RPC Runtime Transport sources
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(rpc\runtime\trans\winnt\common\trans.hxx).
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Revision History:
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GopalP 10/13/1997 Start.
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--*/
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#define MAX_DESTINATION_NAME_LEN 255
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//
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// Common macros
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//
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#if DBG
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#define DEBUG_MIN(x,y) min((x),(y))
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#else
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#define DEBUG_MIN(x,y) max((x),(y))
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#endif
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//
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// Forward declarations
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//
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DWORD
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ResolveName(
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IN TCHAR *lpszDestination,
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OUT LPDWORD lpdwIpAddr
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);
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#if !defined(SENS_CHICAGO)
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//
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// IP name resolver
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//
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const int IP_RETAIL_BUFFER_SIZE = 3*0x38;
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const int IP_BUFFER_SIZE = DEBUG_MIN(1, IP_RETAIL_BUFFER_SIZE);
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class IP_ADDRESS_RESOLVER
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/*++
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Class Description:
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Manages the WSALookupServiceBegin/Next/End calls in a more
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natural way. Used to convert a string network name into
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one or more IP addresses.
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Members:
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_Name - The name being resolved. Set to NULL after the
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first call to NextAddress();
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_hRnr - NULL or the handle returned by a call to
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WSALookupServiceBegin.
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_size - The (total) size of the buffer pointed at by _pwsqs.
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_fFree - If TRUE, _pwsqs needs to be freed when the object
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is destroyed.
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_pwsqs - A buffer of _size bytes used to hold the output
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from WSALookupSericeNext. Maybe a caller supplied
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buffer or allocated internally.
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--*/
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{
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public:
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IP_ADDRESS_RESOLVER(
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IN TCHAR *Name,
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IN DWORD dwSize,
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IN PVOID Buffer
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)
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/*++
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Arguments:
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Name - The name (dotted ip address or DNS name) to resolve.
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dwSize - The size of the Buffer parameter
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Buffer - storage used to keep internal state between
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calls to NextAddress. Maybe freed after the object
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is destoryed.
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--*/
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{
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_Name = Name;
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_hRnr = 0;
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_size = dwSize;
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_fFree = FALSE;
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_pwsqs = (PWSAQUERYSET)Buffer;
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ASSERT(dwSize == 0 || dwSize >= sizeof(WSAQUERYSET));
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}
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RPC_STATUS
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NextAddress(
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OUT LPDWORD lpdwIpAddr
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);
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~IP_ADDRESS_RESOLVER();
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private:
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TCHAR *_Name;
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HANDLE _hRnr;
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DWORD _index;
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DWORD _size;
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BOOL _fFree;
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PWSAQUERYSET _pwsqs;
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};
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#endif // SENS_CHICAGO
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