+++ /dev/null
-#ifndef _WINDNS_H
-#define _WINDNS_H
-#if __GNUC__ >= 3
-#pragma GCC system_header
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define DNS_QUERY_STANDARD 0x0
-#define DNS_QUERY_ACCEPT_TRUNCATED_RESPONSE 0x1
-#define DNS_QUERY_USE_TCP_ONLY 0x2
-#define DNS_QUERY_NO_RECURSION 0x4
-#define DNS_QUERY_BYPASS_CACHE 0x8
-#define DNS_QUERY_NO_WIRE_QUERY 0x10
-#define DNS_QUERY_NO_LOCAL_NAME 0x20
-#define DNS_QUERY_NO_HOSTS_FILE 0x40
-#define DNS_QUERY_NO_NETBT 0x80
-#define DNS_QUERY_TREAT_AS_FQDN 0x1000
-#define DNS_QUERY_WIRE_ONLY 0x100
-#define DNS_QUERY_RETURN_MESSAGE 0x200
-#define DNS_QUERY_DONT_RESET_TTL_VALUES 0x100000
-#define DNS_QUERY_RESERVED 0xff000000
-
-#define DNS_UPDATE_SECURITY_USE_DEFAULT 0x0
-#define DNS_UPDATE_SECURITY_OFF 0x10
-#define DNS_UPDATE_SECURITY_ON 0x20
-#define DNS_UPDATE_SECURITY_ONLY 0x100
-#define DNS_UPDATE_CACHE_SECURITY_CONTEXT 0x200
-#define DNS_UPDATE_TEST_USE_LOCAL_SYS_ACCT 0x400
-#define DNS_UPDATE_FORCE_SECURITY_NEGO 0x800
-#define DNS_UPDATE_RESERVED 0xffff0000
-
-#ifndef RC_INVOKE
-typedef DWORD IP4_ADDRESS;
-typedef DWORD DNS_STATUS;
-enum {
- DNS_TYPE_A=1,
- DNS_TYPE_NS,
- DNS_TYPE_MD,
- DNS_TYPE_MF,
- DNS_TYPE_CNAME,
- DNS_TYPE_SOA,
- DNS_TYPE_MB,
- DNS_TYPE_MG,
- DNS_TYPE_MR,
- DNS_TYPE_NULL,
- DNS_TYPE_WKS,
- DNS_TYPE_PTR,
- DNS_TYPE_HINFO,
- DNS_TYPE_MINFO,
- DNS_TYPE_MX,
- DNS_TYPE_TEXT
-};
-typedef enum _DNS_CHARSET
-{
- DnsCharSetUnknown,
- DnsCharSetUnicode,
- DnsCharSetUtf8,
- DnsCharSetAnsi
-} DNS_CHARSET;
-typedef enum
-{
- DnsConfigPrimaryDomainName_W,
- DnsConfigPrimaryDomainName_A,
- DnsConfigPrimaryDomainName_UTF8,
- DnsConfigAdapterDomainName_W,
- DnsConfigAdapterDomainName_A,
- DnsConfigAdapterDomainName_UTF8,
- DnsConfigDnsServerList,
- DnsConfigSearchList,
- DnsConfigAdapterInfo,
- DnsConfigPrimaryHostNameRegistrationEnabled,
- DnsConfigAdapterHostNameRegistrationEnabled,
- DnsConfigAddressRegistrationMaxCount,
- DnsConfigHostName_W,
- DnsConfigHostName_A,
- DnsConfigHostName_UTF8,
- DnsConfigFullHostName_W,
- DnsConfigFullHostName_A,
- DnsConfigFullHostName_UTF8
-} DNS_CONFIG_TYPE;
-typedef enum
-{
- DnsFreeFlat = 0,
- DnsFreeRecordList,
- DnsFreeParsedMessageFields
-} DNS_FREE_TYPE;
-typedef enum _DNS_NAME_FORMAT
-{
- DnsNameDomain,
- DnsNameDomainLabel,
- DnsNameHostnameFull,
- DnsNameHostnameLabel,
- DnsNameWildcard,
- DnsNameSrvRecord
-} DNS_NAME_FORMAT;
-typedef enum
-{
- DnsSectionQuestion,
- DnsSectionAnswer,
- DnsSectionAuthority,
- DnsSectionAdditional
-} DNS_SECTION;
-typedef struct _IP4_ARRAY {
- DWORD AddrCount;
- IP4_ADDRESS AddrArray[1];
-} IP4_ARRAY, *PIP4_ARRAY;
-typedef struct {
- DWORD IP6Dword[4];
-} IP6_ADDRESS, *PIP6_ADDRESS, DNS_IP6_ADDRESS, *PDNS_IP6_ADDRESS;
-typedef struct _DNS_HEADER {
- WORD Xid;
- BYTE RecursionDesired;
- BYTE Truncation;
- BYTE Authoritative;
- BYTE Opcode;
- BYTE IsResponse;
- BYTE ResponseCode;
- BYTE Reserved;
- BYTE RecursionAvailable;
- WORD QuestionCount;
- WORD AnswerCount;
- WORD NameServerCount;
- WORD AdditionalCount;
-} DNS_HEADER, *PDNS_HEADER;
-typedef struct _DNS_MESSAGE_BUFFER {
- DNS_HEADER MessageHead;
- CHAR MessageBody[1];
-} DNS_MESSAGE_BUFFER, *PDNS_MESSAGE_BUFFER;
-typedef struct _DnsRecordFlags {
- DWORD Section :2;
- DWORD Delete :1;
- DWORD CharSet :2;
- DWORD Unused :3;
- DWORD Reserved :24;
-} DNS_RECORD_FLAGS;
-typedef struct {
- IP4_ADDRESS IpAddress;
-} DNS_A_DATA, *PDNS_A_DATA;
-typedef struct {
- DNS_IP6_ADDRESS Ip6Address;
-} DNS_AAAA_DATA, *PDNS_AAAA_DATA;
-#define DNS_ATMA_MAX_ADDR_LENGTH 20
-typedef struct {
- BYTE AddressType;
- BYTE Address[DNS_ATMA_MAX_ADDR_LENGTH];
-} DNS_ATMA_DATA, *PDNS_ATMA_DATA;
-typedef struct {
- WORD wFlags;
- BYTE chProtocol;
- BYTE chAlgorithm;
- BYTE Key[1];
-} DNS_KEY_DATA, *PDNS_KEY_DATA;
-typedef struct {
- WORD wVersion;
- WORD wSize;
- WORD wHorPrec;
- WORD wVerPrec;
- DWORD dwLatitude;
- DWORD dwLongitude;
- DWORD dwAltitude;
-} DNS_LOC_DATA, *PDNS_LOC_DATA;
-typedef struct {
- LPSTR pNameMailbox;
- LPSTR pNameErrorsMailbox;
-} DNS_MINFO_DATAA, *PDNS_MINFO_DATAA;
-typedef struct {
- LPWSTR pNameMailbox;
- LPWSTR pNameErrorsMailbox;
-} DNS_MINFO_DATAW, *PDNS_MINFO_DATAW;
-typedef struct {
- LPSTR pNameExchange;
- WORD wPreference;
- WORD Pad;
-} DNS_MX_DATAA, *PDNS_MX_DATAA;
-typedef struct {
- LPWSTR pNameExchange;
- WORD wPreference;
- WORD Pad;
-} DNS_MX_DATAW, *PDNS_MX_DATAW;
-typedef struct {
- DWORD dwByteCount;
- BYTE Data[1];
-} DNS_NULL_DATA, *PDNS_NULL_DATA;
-typedef struct {
- LPSTR pNameNext;
- WORD wNumTypes;
- WORD wTypes[1];
-} DNS_NXT_DATAA, *PDNS_NXT_DATAA;
-typedef struct {
- LPWSTR pNameNext;
- WORD wNumTypes;
- WORD wTypes[1];
-} DNS_NXT_DATAW, *PDNS_NXT_DATAW;
-typedef struct {
- LPSTR pNameHost;
-} DNS_PTR_DATAA, *PDNS_PTR_DATAA;
-typedef struct {
- LPWSTR pNameHost;
-} DNS_PTR_DATAW, *PDNS_PTR_DATAW;
-typedef struct {
- LPSTR pNameSigner;
- WORD wTypeCovered;
- BYTE chAlgorithm;
- BYTE chLabelCount;
- DWORD dwOriginalTtl;
- DWORD dwExpiration;
- DWORD dwTimeSigned;
- WORD wKeyTag;
- WORD Pad;
- BYTE Signature[1];
-} DNS_SIG_DATAA, *PDNS_SIG_DATAA;
-typedef struct {
- LPWSTR pNameSigner;
- WORD wTypeCovered;
- BYTE chAlgorithm;
- BYTE chLabelCount;
- DWORD dwOriginalTtl;
- DWORD dwExpiration;
- DWORD dwTimeSigned;
- WORD wKeyTag;
- WORD Pad;
- BYTE Signature[1];
-} DNS_SIG_DATAW, *PDNS_SIG_DATAW;
-typedef struct {
- LPSTR pNamePrimaryServer;
- LPSTR pNameAdministrator;
- DWORD dwSerialNo;
- DWORD dwRefresh;
- DWORD dwRetry;
- DWORD dwExpire;
- DWORD dwDefaultTtl;
-} DNS_SOA_DATAA, *PDNS_SOA_DATAA;
-typedef struct {
- LPWSTR pNamePrimaryServer;
- LPWSTR pNameAdministrator;
- DWORD dwSerialNo;
- DWORD dwRefresh;
- DWORD dwRetry;
- DWORD dwExpire;
- DWORD dwDefaultTtl;
-} DNS_SOA_DATAW, *PDNS_SOA_DATAW;
-typedef struct {
- LPSTR pNameTarget;
- WORD wPriority;
- WORD wWeight;
- WORD wPort;
- WORD Pad;
-} DNS_SRV_DATAA, *PDNS_SRV_DATAA;
-typedef struct {
- LPWSTR pNameTarget;
- WORD wPriority;
- WORD wWeight;
- WORD wPort;
- WORD Pad;
-} DNS_SRV_DATAW, *PDNS_SRV_DATAW;
-typedef struct {
- DWORD dwStringCount;
- LPSTR pStringArray[1];
-} DNS_TXT_DATAA, *PDNS_TXT_DATAA;
-typedef struct {
- DWORD dwStringCount;
- LPWSTR pStringArray[1];
-} DNS_TXT_DATAW, *PDNS_TXT_DATAW;
-typedef struct {
- LPSTR pNameAlgorithm;
- PBYTE pAlgorithmPacket;
- PBYTE pKey;
- PBYTE pOtherData;
- DWORD dwCreateTime;
- DWORD dwExpireTime;
- WORD wMode;
- WORD wError;
- WORD wKeyLength;
- WORD wOtherLength;
- UCHAR cAlgNameLength;
- BOOL bPacketPointers;
-} DNS_TKEY_DATAA, *PDNS_TKEY_DATAA;
-typedef struct {
- LPWSTR pNameAlgorithm;
- PBYTE pAlgorithmPacket;
- PBYTE pKey;
- PBYTE pOtherData;
- DWORD dwCreateTime;
- DWORD dwExpireTime;
- WORD wMode;
- WORD wError;
- WORD wKeyLength;
- WORD wOtherLength;
- UCHAR cAlgNameLength;
- BOOL bPacketPointers;
-} DNS_TKEY_DATAW, *PDNS_TKEY_DATAW;
-typedef struct {
- LPSTR pNameAlgorithm;
- PBYTE pAlgorithmPacket;
- PBYTE pSignature;
- PBYTE pOtherData;
- LONGLONG i64CreateTime;
- WORD wFudgeTime;
- WORD wOriginalXid;
- WORD wError;
- WORD wSigLength;
- WORD wOtherLength;
- UCHAR cAlgNameLength;
- BOOL bPacketPointers;
-} DNS_TSIG_DATAA, *PDNS_TSIG_DATAA;
-typedef struct {
- LPWSTR pNameAlgorithm;
- PBYTE pAlgorithmPacket;
- PBYTE pSignature;
- PBYTE pOtherData;
- LONGLONG i64CreateTime;
- WORD wFudgeTime;
- WORD wOriginalXid;
- WORD wError;
- WORD wSigLength;
- WORD wOtherLength;
- UCHAR cAlgNameLength;
- BOOL bPacketPointers;
-} DNS_TSIG_DATAW, *PDNS_TSIG_DATAW;
-typedef struct {
- DWORD dwMappingFlag;
- DWORD dwLookupTimeout;
- DWORD dwCacheTimeout;
- DWORD cWinsServerCount;
- IP4_ADDRESS WinsServers[1];
-} DNS_WINS_DATA, *PDNS_WINS_DATA;
-typedef struct {
- DWORD dwMappingFlag;
- DWORD dwLookupTimeout;
- DWORD dwCacheTimeout;
- LPSTR pNameResultDomain;
-} DNS_WINSR_DATAA, *PDNS_WINSR_DATAA;
-typedef struct {
- DWORD dwMappingFlag;
- DWORD dwLookupTimeout;
- DWORD dwCacheTimeout;
- LPWSTR pNameResultDomain;
-} DNS_WINSR_DATAW, *PDNS_WINSR_DATAW;
-typedef struct _DNS_WIRE_QUESTION {
- WORD QuestionType;
- WORD QuestionClass;
-} DNS_WIRE_QUESTION, *PDNS_WIRE_QUESTION;
-typedef struct _DNS_WIRE_RECORD {
- WORD RecordType;
- WORD RecordClass;
- DWORD TimeToLive;
- WORD DataLength;
-} DNS_WIRE_RECORD, *PDNS_WIRE_RECORD;
-typedef struct {
- IP4_ADDRESS IpAddress;
- UCHAR chProtocol;
- BYTE BitMask[1];
-} DNS_WKS_DATA, *PDNS_WKS_DATA;
-typedef struct _DnsRecordA {
- struct _DnsRecordA* pNext;
- LPSTR pName;
- WORD wType;
- WORD wDataLength;
- union {
- DWORD DW;
- DNS_RECORD_FLAGS S;
- } Flags;
- DWORD dwTtl;
- DWORD dwReserved;
- union {
- DNS_A_DATA A;
- DNS_SOA_DATAA SOA, Soa;
- DNS_PTR_DATAA PTR, Ptr, NS, Ns, CNAME, Cname, MB, Mb,
- MD, Md, MF, Mf, MG, Mg, MR, Mr;
- DNS_MINFO_DATAA MINFO, Minfo, RP, Rp;
- DNS_MX_DATAA MX, Mx, AFSDB, Afsdb, RT, Rt;
- DNS_TXT_DATAA HINFO, Hinfo, ISDN, Isdn, TXT, Txt, X25;
- DNS_NULL_DATA Null;
- DNS_WKS_DATA WKS, Wks;
- DNS_AAAA_DATA AAAA;
- DNS_KEY_DATA KEY, Key;
- DNS_SIG_DATAA SIG, Sig;
- DNS_ATMA_DATA ATMA, Atma;
- DNS_NXT_DATAA NXT, Nxt;
- DNS_SRV_DATAA SRV, Srv;
- DNS_TKEY_DATAA TKEY, Tkey;
- DNS_TSIG_DATAA TSIG, Tsig;
- DNS_WINS_DATA WINS, Wins;
- DNS_WINSR_DATAA WINSR, WinsR, NBSTAT, Nbstat;
- } Data;
-} DNS_RECORDA, *PDNS_RECORDA;
-typedef struct _DnsRecordW {
- struct _DnsRecordW* pNext;
- LPWSTR pName;
- WORD wType;
- WORD wDataLength;
- union {
- DWORD DW;
- DNS_RECORD_FLAGS S;
- } Flags;
- DWORD dwTtl;
- DWORD dwReserved;
- union {
- DNS_A_DATA A;
- DNS_SOA_DATAW SOA, Soa;
- DNS_PTR_DATAW PTR, Ptr, NS, Ns, CNAME, Cname, MB, Mb,
- MD, Md, MF, Mf, MG, Mg, MR, Mr;
- DNS_MINFO_DATAW MINFO, Minfo, RP, Rp;
- DNS_MX_DATAW MX, Mx, AFSDB, Afsdb, RT, Rt;
- DNS_TXT_DATAW HINFO, Hinfo, ISDN, Isdn, TXT, Txt, X25;
- DNS_NULL_DATA Null;
- DNS_WKS_DATA WKS, Wks;
- DNS_AAAA_DATA AAAA;
- DNS_KEY_DATA KEY, Key;
- DNS_SIG_DATAW SIG, Sig;
- DNS_ATMA_DATA ATMA, Atma;
- DNS_NXT_DATAW NXT, Nxt;
- DNS_SRV_DATAW SRV, Srv;
- DNS_TKEY_DATAW TKEY, Tkey;
- DNS_TSIG_DATAW TSIG, Tsig;
- DNS_WINS_DATA WINS, Wins;
- DNS_WINSR_DATAW WINSR, WinsR, NBSTAT, Nbstat;
- } Data;
-} DNS_RECORDW, *PDNS_RECORDW;
-
-#ifdef UNICODE
-#define DNS_RECORD DNS_RECORDW
-#define PDNS_RECORD PDNS_RECORDW
-#else
-#define DNS_RECORD DNS_RECORDA
-#define PDNS_RECORD PDNS_RECORDA
-#endif
-
-typedef struct _DnsRRSet {
- PDNS_RECORD pFirstRR;
- PDNS_RECORD pLastRR;
-} DNS_RRSET, *PDNS_RRSET;
-
-DNS_STATUS WINAPI DnsAcquireContextHandle_A(DWORD,PVOID,HANDLE*);
-DNS_STATUS WINAPI DnsAcquireContextHandle_W(DWORD,PVOID,HANDLE*);
-DNS_STATUS WINAPI DnsExtractRecordsFromMessage_W(PDNS_MESSAGE_BUFFER,WORD,PDNS_RECORD*);
-DNS_STATUS WINAPI DnsExtractRecordsFromMessage_UTF8(PDNS_MESSAGE_BUFFER,WORD,PDNS_RECORD*);
-DNS_STATUS WINAPI DnsModifyRecordsInSet_A(PDNS_RECORD,PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-DNS_STATUS WINAPI DnsModifyRecordsInSet_W(PDNS_RECORD,PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-DNS_STATUS WINAPI DnsModifyRecordsInSet_UTF8(PDNS_RECORD,PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-BOOL WINAPI DnsNameCompare_A(LPSTR,LPSTR);
-BOOL WINAPI DnsNameCompare_W(LPWSTR,LPWSTR);
-DNS_STATUS WINAPI DnsQuery_A(PCSTR,WORD,DWORD,PIP4_ARRAY,PDNS_RECORD*,PVOID*);
-DNS_STATUS WINAPI DnsQuery_W(PCWSTR,WORD,DWORD,PIP4_ARRAY,PDNS_RECORD*,PVOID*);
-DNS_STATUS WINAPI DnsQuery_UTF8(PCSTR,WORD,DWORD,PIP4_ARRAY,PDNS_RECORD*,PVOID*);
-DNS_STATUS WINAPI DnsQueryConfig(DNS_CONFIG_TYPE,DWORD,PWSTR,PVOID,PVOID,PDWORD);
-BOOL WINAPI DnsRecordCompare(PDNS_RECORD,PDNS_RECORD);
-PDNS_RECORD WINAPI DnsRecordCopyEx(PDNS_RECORD,DNS_CHARSET,DNS_CHARSET);
-void WINAPI DnsRecordListFree(PDNS_RECORD,DNS_FREE_TYPE);
-BOOL WINAPI DnsRecordSetCompare(PDNS_RECORD,PDNS_RECORD,PDNS_RECORD*,PDNS_RECORD*);
-PDNS_RECORD WINAPI DnsRecordSetCopyEx(PDNS_RECORD,DNS_CHARSET,DNS_CHARSET);
-PDNS_RECORD WINAPI DnsRecordSetDetach(PDNS_RECORD);
-void WINAPI DnsReleaseContextHandle(HANDLE);
-DNS_STATUS WINAPI DnsReplaceRecordSetA(PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-DNS_STATUS WINAPI DnsReplaceRecordSetW(PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-DNS_STATUS WINAPI DnsReplaceRecordSetUTF8(PDNS_RECORD,DWORD,HANDLE,PIP4_ARRAY,PVOID);
-DNS_STATUS WINAPI DnsValidateName_A(LPCSTR,DNS_NAME_FORMAT);
-DNS_STATUS WINAPI DnsValidateName_W(LPCWSTR, DNS_NAME_FORMAT);
-DNS_STATUS WINAPI DnsValidateName_UTF8(LPCSTR,DNS_NAME_FORMAT);
-BOOL WINAPI DnsWriteQuestionToBuffer_W(PDNS_MESSAGE_BUFFER,LPDWORD,LPWSTR,WORD,WORD,BOOL);
-BOOL WINAPI DnsWriteQuestionToBuffer_UTF8(PDNS_MESSAGE_BUFFER,LPDWORD,LPSTR,WORD,WORD,BOOL);
-
-#ifdef UNICODE
-#define DNS_MINFO_DATA DNS_MINFO_DATAW
-#define PDNS_MINFO_DATA PDNS_MINFO_DATAW
-#define DNS_MX_DATA DNS_MX_DATAW
-#define PDNS_MX_DATA PDNS_MX_DATAW
-#define DNS_NXT_DATA DNS_NXT_DATAW
-#define PDNS_NXT_DATA PDNS_NXT_DATAW
-#define DNS_PTR_DATA DNS_PTR_DATAW
-#define PDNS_PTR_DATA PDNS_PTR_DATAW
-#define DNS_SIG_DATA DNS_SIG_DATAW
-#define PDNS_SIG_DATA PDNS_SIG_DATAW
-#define DNS_SOA_DATA DNS_SOA_DATAW
-#define PDNS_SOA_DATA PDNS_SOA_DATAW
-#define DNS_TXT_DATA DNS_TXT_DATAW
-#define PDNS_TXT_DATA PDNS_TXT_DATAW
-#define DNS_TKEY_DATA DNS_TKEY_DATAW
-#define PDNS_TKEY_DATA PDNS_TKEY_DATAW
-#define DNS_WINSR_DATA DNS_WINSR_DATAW
-#define PDNS_WINSR_DATA PDNS_WINSR_DATAW
-#define DnsAcquireContextHandle DnsAcquireContextHandle_W
-#define DnsModifyRecordsInSet DnsModifyRecordsInSet_W
-#define DnsNameCompare DnsNameCompare_W
-#define DnsQuery DnsQuery_W
-#define DnsReplaceRecordSet DnsReplaceRecordSetW
-#define DnsValidateName DnsValidateName_W
-#else
-#define DNS_MINFO_DATA DNS_MINFO_DATAA
-#define PDNS_MINFO_DATA PDNS_MINFO_DATAA
-#define DNS_MX_DATA DNS_MX_DATAA
-#define PDNS_MX_DATA PDNS_MX_DATAA
-#define DNS_NXT_DATA DNS_NXT_DATAA
-#define PDNS_NXT_DATA PDNS_NXT_DATAA
-#define DNS_PTR_DATA DNS_PTR_DATAA
-#define PDNS_PTR_DATA PDNS_PTR_DATAA
-#define DNS_SIG_DATA DNS_SIG_DATAA
-#define PDNS_SIG_DATA PDNS_SIG_DATAA
-#define DNS_SOA_DATA DNS_SOA_DATAA
-#define PDNS_SOA_DATA PDNS_SOA_DATAA
-#define DNS_TXT_DATA DNS_TXT_DATAA
-#define PDNS_TXT_DATA PDNS_TXT_DATAA
-#define DNS_TKEY_DATA DNS_TKEY_DATAA
-#define PDNS_TKEY_DATA PDNS_TKEY_DATAA
-#define DNS_WINSR_DATA DNS_WINSR_DATAA
-#define PDNS_WINSR_DATA PDNS_WINSR_DATAA
-#define DnsAcquireContextHandle DnsAcquireContextHandle_A
-#define DnsModifyRecordsInSet DnsModifyRecordsInSet_A
-#define DnsNameCompare DnsNameCompare_A
-#define DnsQuery DnsQuery_A
-#define DnsReplaceRecordSet DnsReplaceRecordSetA
-#define DnsValidateName DnsValidateName_A
-#endif
-
-#endif /* RC_INVOKED */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _WINDNS_H */
projects / reactos.git / blobdiff