162 lines
9.4 KiB
C
162 lines
9.4 KiB
C
//================================================================================
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// Copyright (C) Microsoft Corporation 1997.
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// Author: RameshV
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// Date: 09-Sep-97 06:20
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// Description: Manages the class-id and options information
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//================================================================================
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#ifndef OPTIONS_H
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#define OPTIONS_H
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#define MAX_DATA_LEN 255 // atmost 255 bytes for an option
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typedef struct _DHCP_CLASSES { // common pool of class names
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LIST_ENTRY ClassList; // global list of classes
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LPBYTE ClassName; // name of the class
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DWORD ClassLen; // # of bytes in class name
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DWORD RefCount; // # of references to this
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} DHCP_CLASSES, *LPDHCP_CLASSES, *PDHCP_CLASSES;
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typedef struct _DHCP_OPTION { // list of options
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LIST_ENTRY OptionList; // the fwd/back ptrs
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BYTE OptionId; // the option value
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BOOL IsVendor; // is this vendor specific
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LPBYTE ClassName; // the class of this option
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DWORD ClassLen; // the length of above option
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time_t ExpiryTime; // when this option expires
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LPBYTE Data; // the data value for this option
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DWORD DataLen; // the # of bytes of above
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} DHCP_OPTION , *LPDHCP_OPTION , *PDHCP_OPTION ;
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typedef struct _DHCP_OPTION_DEF {
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LIST_ENTRY OptionDefList; // list of option definitions
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BYTE OptionId; // the option id
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BOOL IsVendor; // is this vendor specific?
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LPBYTE ClassName; // the class this belongs to
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DWORD ClassLen; // the size of above in bytes
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LPWSTR RegSendLoc; // where is the info about sending this out
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LPWSTR RegSaveLoc; // where is this option going to be stored?
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DWORD RegValueType; // as what value should this be stored?
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} DHCP_OPTION_DEF, *LPDHCP_OPTION_DEF, *PDHCP_OPTION_DEF;
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//================================================================================
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// exported functions classes
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//================================================================================
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//--------------------------------------------------------------------------------
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// In all of the following functions, ClassesList is unprotected within the fn.
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// Caller has to take a lock on it.
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//--------------------------------------------------------------------------------
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LPBYTE // data bytes, or NULL (no mem)
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DhcpAddClass( // add a new class
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IN OUT PLIST_ENTRY ClassesList, // list to add to
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IN LPBYTE Data, // input class name
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IN DWORD Len // # of bytes of above
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); // Add the new class into the list or bump up ref count if already there
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DWORD // status (FILE_NOT_FOUND => no such class)
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DhcpDelClass( // de-refernce a class
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IN OUT PLIST_ENTRY ClassesList, // the list to delete off
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IN LPBYTE Data, // the data ptr
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IN DWORD Len // the # of bytes of above
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); // decrease refcount in the list and if becomes zero, free the struct
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VOID // always succeeds
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DhcpFreeAllClasses( // free each elt of the list
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IN OUT PLIST_ENTRY ClassesList // input list of classes
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); // free every class in the list
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//--------------------------------------------------------------------------------
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// In all the following functions, OptionsList is unprotected within the fn.
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// Caller has to take a lock on it.
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//--------------------------------------------------------------------------------
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PDHCP_OPTION // the reqd structure or NULL
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DhcpFindOption( // find a specific option
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IN OUT PLIST_ENTRY OptionsList, // the list of options to search
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IN BYTE OptionId, // the option id to search for
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IN BOOL IsVendor, // is it vendor specific?
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IN LPBYTE ClassName, // is there a class associated?
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IN DWORD ClassLen // # of bytes of above parameter
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); // search for the required option in the list, return NULL if not found
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DWORD // status or ERROR_FILE_NOT_FOUND
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DhcpDelOption( // remove a particular option
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IN PDHCP_OPTION Option2Delete // delete this option
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); // delete an existing option in the list, and free up space used
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DWORD // status
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DhcpAddOption( // add a new option
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IN OUT PLIST_ENTRY OptionsList, // list to add to
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IN BYTE OptionId, // option id to add
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IN BOOL IsVendor, // is it vendor specific?
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IN LPBYTE ClassName, // what is the class?
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IN DWORD ClassLen, // size of above in bytes
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IN LPBYTE Data, // data for this option
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IN DWORD DataLen, // # of bytes of above
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IN time_t ExpiryTime // when the option expires
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); // replace or add new option to the list. fail if not enough memory
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VOID // always succeeds
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DhcpFreeAllOptions( // frees all the options
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IN OUT PLIST_ENTRY OptionsList // input list of options
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); // free every option in the list
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time_t // 0 || time for next expiry (absolute)
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DhcpGetExpiredOptions( // delete all expired options
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IN OUT PLIST_ENTRY OptionsList, // list to search frm
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OUT PLIST_ENTRY ExpiredOptions // o/p list of expired options
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); // move expired options between lists and return timer. 0 => switch off timer.
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//--------------------------------------------------------------------------------
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// In all the following functions, OptionsDefList is unprotected. Caller has
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// to take a lock on it.
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//--------------------------------------------------------------------------------
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DWORD // status
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DhcpAddOptionDef( // add a new option definition
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IN OUT PLIST_ENTRY OptionDefList, // input list of options to add to
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IN BYTE OptionId, // option to add
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IN BOOL IsVendor, // is it vendor specific
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IN LPBYTE ClassName, // name of class it belongs to
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IN DWORD ClassLen, // the size of above in bytes
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IN LPWSTR RegSendLoc, // where to get info about sending this out
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IN LPWSTR RegSaveLoc, // where to get info about saving this
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IN DWORD ValueType // what is the type when saving it?
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);
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PDHCP_OPTION_DEF // NULL, or requested option def
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DhcpFindOptionDef( // search for a particular option
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IN PLIST_ENTRY OptionDefList, // list to search in
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IN BYTE OptionId, // the option id to search for
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IN BOOL IsVendor, // is it vendor specific
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IN LPBYTE ClassName, // the class, if one exists
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IN DWORD ClassLen // # of bytes of class name
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);
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DWORD // status
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DhcpDelOptionDef( // delete a particular option def
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IN PLIST_ENTRY OptionDefList, // list to delete from
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IN BYTE OptionId, // the option id to delete
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IN BOOL IsVendor, // is it vendor specific
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IN LPBYTE ClassName, // the class, if one exists
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IN DWORD ClassLen // # of bytes of class name
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);
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VOID
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DhcpFreeAllOptionDefs( // free each element of a list
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IN OUT PLIST_ENTRY OptionDefList, // the list to free
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IN OUT PLIST_ENTRY ClassesList // classes to de-ref off
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);
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BOOL // TRUE==>found..
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DhcpOptionsFindDomain( // find the domain name option values
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IN OUT PDHCP_CONTEXT DhcpContext, // for this adapter
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OUT LPBYTE *Data, // fill this ptr up
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OUT LPDWORD DataLen
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);
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#endif OPTIONS_H
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