#pragma	lib	"libventi.a"#pragma	src	"/sys/src/libventi" typedef struct VtSession	VtSession;typedef struct VtSha1		VtSha1;typedef struct Packet		Packet;typedef struct VtLock 		VtLock;typedef struct VtRendez		VtRendez;typedef struct VtRootLump	VtRootLump;typedef struct VtDirEntry1	VtDirEntry1;typedef struct VtDirEntry2	VtDirEntry2;typedef struct VtServerVtbl	VtServerVtbl;typedef VtDirEntry2	VtDirEntry; enum {	VtScoreSize	= 20, /* Venti */	VtMaxLumpSize	= 56*1024,	VtPointerDepth	= 7,		VtDirEntrySize1	= 32,	VtDirEntrySize2	= 40,	VtDirEntrySize	= VtDirEntrySize2,	VtRootSize 	= 300,	VtMaxStringSize	= 1000,	VtAuthSize 	= 1024,  /* size of auth group - in bits - must be multiple of 8 */	MaxFragSize 	= 9*1024,	VtMaxFileSize	= (1ULL<<48) - 1,	VtRootVersion1	= 1,	VtRootVersion2	= 2,	VtRootVersion	= VtRootVersion2,}; /* crypto strengths */enum {	VtCryptoStrengthNone,	VtCryptoStrengthAuth,	VtCryptoStrengthWeak,	VtCryptoStrengthStrong,}; /* crypto suites */enum {	VtCryptoNone,	VtCryptoSSL3,	VtCryptoTLS1, 	VtCryptoMax}; /* codecs */enum {	VtCodecNone, 	VtCodecDeflate,	VtCodecThwack, 	VtCodecMax}; /* Lump Types */enum {	VtErrType,		/* illegal */ 	VtRootType,	VtDirType,	VtPointerType0,	VtPointerType1,	VtPointerType2,	VtPointerType3,	VtPointerType4,	VtPointerType5,	VtPointerType6,	VtPointerType7,		/* not used */	VtPointerType8,		/* not used */	VtPointerType9,		/* not used */	VtDataType, 	VtMaxType, 	VtPrivateTypes = 0xf0,	/* for interal use - not to go over protocol */}; /* Dir Entry flags */enum {	VtDirEntryActive = (1<<0),	/* entry is in use */	VtDirEntryDir = (1<<1),		/* a directory */	VtDirEntryDepthShift = 2,	/* shift for pointer depth */	VtDirEntryDepthMask = (0x7<<2),	/* mask for pointer depth */}; /* * VtRootLump & VtDirEntry perhaps need to be more portable */struct VtRootLump {	uchar version[2];	char name[128];	char type[128];	uchar score[VtScoreSize];	/* to a Dir block */	uchar blockSize[2];		/* maximum block size */	uchar prev[VtScoreSize];	/* last root block */};  /* the old directory structure - should go away */struct VtDirEntry1 {	uchar psize[2];			/* pointer block size */	uchar dsize[2];			/* data block size */	uchar flag;	uchar gen;	uchar size[6];	uchar score[VtScoreSize];}; struct VtDirEntry2 {	uchar gen[4];			/* generation number */	uchar psize[2];			/* pointer block size */	uchar dsize[2];			/* data block size */	uchar flag;	uchar reserved[5];	uchar size[6];	uchar score[VtScoreSize];}; struct VtServerVtbl {	Packet *(*read)(VtSession*, uchar score[VtScoreSize], int type, int n);	int (*write)(VtSession*, uchar score[VtScoreSize], int type, Packet *p);	void (*closing)(VtSession*, int clean);}; /* versions */enum {	/* experimental versions */	VtVersion01 = 1,	VtVersion02,}; /* score of zero length block */extern uchar vtZeroScore[VtScoreSize];	 /* both sides */void vtAttach(void);void vtDetach(void);void vtClose(VtSession *s);void vtFree(VtSession *s);char *vtGetUid(VtSession *s);char *vtGetSid(VtSession *s);int vtSetDebug(VtSession *s, int);int vtGetDebug(VtSession *s);int vtSetFd(VtSession *s, int fd);int vtGetFd(VtSession *s);int vtConnect(VtSession *s, char *password);int vtSetCryptoStrength(VtSession *s, int);int vtGetCryptoStrength(VtSession *s);int vtSetCompression(VtSession *s, int);int vtGetCompression(VtSession *s);int vtGetCrypto(VtSession *s);int vtGetCodec(VtSession *s);char *vtGetVersion(VtSession *s);char *vtGetError(void);int vtErrFmt(Fmt *fmt);void vtDebug(VtSession*, char *, ...);void vtDebugMesg(VtSession *z, Packet *p, char *s);  /* client side */VtSession *vtClientAlloc(void);VtSession *vtDial(char *server);VtSession *vtStdioServer(char *server);int vtPing(VtSession *s);int vtSetUid(VtSession*, char *uid);int vtRead(VtSession*, uchar score[VtScoreSize], int type, uchar *buf, int n);int vtWrite(VtSession*, uchar score[VtScoreSize], int type, uchar *buf, int n);Packet *vtReadPacket(VtSession*, uchar score[VtScoreSize], int type, int n);int vtWritePacket(VtSession*, uchar score[VtScoreSize], int type, Packet *p); int vtZeroExtend(int type, uchar *buf, int n, int nn);int vtZeroRetract(int type, uchar *buf, int n); /* server side */VtSession *vtServerAlloc(VtServerVtbl*);int vtSetSid(VtSession *s, char *sid);int vtExport(VtSession *s); /* sha1 */VtSha1* vtSha1Alloc(void);void vtSha1Free(VtSha1*);void vtSha1Init(VtSha1*);void vtSha1Update(VtSha1*, uchar *, int n);void vtSha1Final(VtSha1*, uchar sha1[VtScoreSize]);void vtSha1(uchar score[VtScoreSize], uchar *, int);int vtSha1Check(uchar score[VtScoreSize], uchar *, int);int vtScoreFmt(Fmt *fmt); /* Packet */Packet *packetAlloc(void);void packetFree(Packet*);Packet *packetForeign(uchar *buf, int n, void (*free)(void *a), void *a);Packet *packetDup(Packet*, int offset, int n);Packet *packetSplit(Packet*, int n);int packetConsume(Packet*, uchar *buf, int n);int packetTrim(Packet*, int offset, int n);uchar *packetHeader(Packet*, int n);uchar *packetTrailer(Packet*, int n);int packetPrefix(Packet*, uchar *buf, int n);int packetAppend(Packet*, uchar *buf, int n);int packetConcat(Packet*, Packet*);uchar *packetPeek(Packet*, uchar *buf, int offset, int n);int packetCopy(Packet*, uchar *buf, int offset, int n);int packetFragments(Packet*, IOchunk*, int nio, int offset);int packetSize(Packet*);int packetAllocatedSize(Packet*);void packetSha1(Packet*, uchar sha1[VtScoreSize]);int packetCompact(Packet*);int packetCmp(Packet*, Packet*);void packetStats(void); /* portability stuff - should be a seperate library */ void vtMemFree(void *);void *vtMemAlloc(int);void *vtMemAllocZ(int);void *vtMemRealloc(void *p, int);void *vtMemBrk(int n);char *vtStrDup(char *);void vtFatal(char *, ...);char *vtGetError(void);char *vtSetError(char *);char *vtOSError(void); int	vtGetUint16(uchar *p);ulong	vtGetUint32(uchar *p);uvlong	vtGetUint48(uchar *p);uvlong	vtGetUint64(uchar *p);void	vtPutUint16(uchar *p, int x);void	vtPutUint32(uchar *p, ulong x);void	vtPutUint48(uchar *p, uvlong x);void	vtPutUint64(uchar *p, uvlong x); /* locking/threads */int vtThread(void (*f)(void*), void *rock);VtLock *vtLockAlloc(void);void vtLockInit(VtLock**);void vtLock(VtLock *);void vtUnlock(VtLock *);void vtLockFree(VtLock *);VtRendez *vtRendezAlloc(VtLock*);void vtRendezFree(VtRendez*);int vtSleep(VtRendez*);int vtWakeup(VtRendez*); /* fd functions - really network (socket) functions */void vtFdClose(int);int vtFdRead(int, uchar*, int);int vtFdReadFully(int, uchar*, int);int vtFdWrite(int, uchar*, int); /* * formatting * other than noted, these formats all ignore * the width and precision arguments, and all flags * * V	a venti score * R	venti error */#pragma	varargck	type	"V"		uchar*#pragma	varargck	type	"R"		void