1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
#pragma lib "liboventi.a"
#pragma src "/sys/src/liboventi"
typedef struct VtSession VtSession;
typedef struct VtSha1 VtSha1;
typedef struct Packet Packet;
typedef struct VtLock VtLock;
typedef struct VtRendez VtRendez;
typedef struct VtRoot VtRoot;
typedef struct VtEntry VtEntry;
typedef struct VtServerVtbl VtServerVtbl;
#pragma incomplete VtSession
#pragma incomplete VtSha1
#pragma incomplete Packet
#pragma incomplete VtLock
#pragma incomplete VtRendez
enum {
VtScoreSize = 20, /* Venti */
VtMaxLumpSize = 56*1024,
VtPointerDepth = 7,
VtEntrySize = 40,
VtRootSize = 300,
VtMaxStringSize = 1000,
VtAuthSize = 1024, /* size of auth group - in bits - must be multiple of 8 */
MaxFragSize = 9*1024,
VtMaxFileSize = (1ULL<<48) - 1,
VtRootVersion = 2,
};
/* 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
};
/* Dir Entry flags */
enum {
VtEntryActive = (1<<0), /* entry is in use */
VtEntryDir = (1<<1), /* a directory */
VtEntryDepthShift = 2, /* shift for pointer depth */
VtEntryDepthMask = (0x7<<2), /* mask for pointer depth */
VtEntryLocal = (1<<5), /* used for local storage: should not be set for Venti blocks */
VtEntryNoArchive = (1<<6), /* used for local storage: should not be set for Venti blocks */
};
struct VtRoot {
ushort version;
char name[128];
char type[128];
uchar score[VtScoreSize]; /* to a Dir block */
ushort blockSize; /* maximum block size */
uchar prev[VtScoreSize]; /* last root block */
};
struct VtEntry {
ulong gen; /* generation number */
ushort psize; /* pointer block size */
ushort dsize; /* data block size */
uchar depth; /* unpacked from flags */
uchar flags;
uvlong size;
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);
void (*sync)(VtSession*);
};
/* 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);
/* internal */
VtSession *vtAlloc(void);
void vtReset(VtSession*);
int vtAddString(Packet*, char*);
int vtGetString(Packet*, char**);
int vtSendPacket(VtSession*, Packet*);
Packet *vtRecvPacket(VtSession*);
void vtDisconnect(VtSession*, int);
int vtHello(VtSession*);
/* client side */
VtSession *vtClientAlloc(void);
VtSession *vtDial(char *server, int canfail);
int vtRedial(VtSession*, 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 vtSync(VtSession *s);
int vtZeroExtend(int type, uchar *buf, int n, int nn);
int vtZeroTruncate(int type, uchar *buf, int n);
int vtParseScore(char*, uint, uchar[VtScoreSize]);
void vtRootPack(VtRoot*, uchar*);
int vtRootUnpack(VtRoot*, uchar*);
void vtEntryPack(VtEntry*, uchar*, int index);
int vtEntryUnpack(VtEntry*, uchar*, int index);
/* 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);
/* locking/threads */
int vtThread(void (*f)(void*), void *rock);
void vtThreadSetName(char*);
VtLock *vtLockAlloc(void);
/* void vtLockInit(VtLock**); */
void vtLock(VtLock*);
int vtCanLock(VtLock*);
void vtRLock(VtLock*);
int vtCanRLock(VtLock*);
void vtUnlock(VtLock*);
void vtRUnlock(VtLock*);
void vtLockFree(VtLock*);
VtRendez *vtRendezAlloc(VtLock*);
void vtRendezFree(VtRendez*);
int vtSleep(VtRendez*);
int vtWakeup(VtRendez*);
int vtWakeupAll(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
#pragma varargck argpos vtSetError 1
|
