2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 /* String conversion routines have the following copyright */
13 * Copyright (c) 2002 Kungliga Tekniska Högskolan
14 * (Royal Institute of Technology, Stockholm, Sweden).
15 * All rights reserved.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
28 * 3. Neither the name of the Institute nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
32 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
45 #include <afsconfig.h>
46 #include <afs/param.h>
55 # if !defined(AFS_LINUX20_ENV) && !defined(AFS_ARM_DARWIN_ENV)
56 # include <netinet/if_ether.h>
63 # include "afs/sysincludes.h"
64 # include "afsincludes.h"
67 # include "rx/rx_prototypes.h"
71 char eaddr[6]; /* 6 bytes of ethernet hardware address */
72 } uuid_address_t, *uuid_address_p_t;
78 } uuid_time_t, *uuid_time_p_t;
80 static int uuid_get_address(uuid_address_p_t addr);
81 void uuid__get_os_time(uuid_time_t * os_time);
84 * |<------------------------- 32 bits -------------------------->|
86 * +--------------------------------------------------------------+
87 * | low 32 bits of time | 0-3 .time_low
88 * +-------------------------------+-------------------------------
89 * | mid 16 bits of time | 4-5 .time_mid
90 * +-------+-----------------------+
91 * | vers. | hi 12 bits of time | 6-7 .time_hi_and_version
92 * +-------+-------+---------------+
93 * |Res| clkSeqHi | 8 .clock_seq_hi_and_reserved
95 * | clkSeqLow | 9 .clock_seq_low
96 * +---------------+----------...-----+
97 * | node ID | 8-16 .node
98 * +--------------------------...-----+
101 afsUUID afs_uuid_g_nil_uuid;
102 static uuid_time_t time_now, time_last;
103 static u_short uuid_time_adjust, clock_seq;
104 static afs_uint32 rand_m, rand_ia, rand_ib, rand_irand, uuid_init_done = 0;
106 #define uuid_create_nil(uuid) memset(uuid, 0, sizeof(afsUUID))
109 afs_uuid_equal(afsUUID * u1, afsUUID * u2)
111 return (memcmp(u1, u2, sizeof(afsUUID)) == 0);
115 afs_uuid_is_nil(afsUUID * u1)
119 return afs_uuid_equal(u1, &afs_uuid_g_nil_uuid);
123 afs_htonuuid(afsUUID * uuidp)
125 uuidp->time_low = htonl(uuidp->time_low);
126 uuidp->time_mid = htons(uuidp->time_mid);
127 uuidp->time_hi_and_version = htons(uuidp->time_hi_and_version);
131 afs_ntohuuid(afsUUID * uuidp)
133 uuidp->time_low = ntohl(uuidp->time_low);
134 uuidp->time_mid = ntohs(uuidp->time_mid);
135 uuidp->time_hi_and_version = ntohs(uuidp->time_hi_and_version);
146 if (rand_ia >= 99991)
148 if (rand_ib >= 224729)
150 rand_irand = (rand_irand * rand_m) + rand_ia + rand_ib;
151 return (((rand_irand) >> 16) ^ (rand_irand & 0x3fff));
156 time_cmp(uuid_time_p_t time1, uuid_time_p_t time2)
158 if (time1->hi < time2->hi)
160 if (time1->hi > time2->hi)
162 if (time1->lo < time2->lo)
164 if (time1->lo > time2->lo)
170 * Converts a string UUID to binary representation.
173 #if !defined(KERNEL) && !defined(UKERNEL)
175 afsUUID_from_string(const char *str, afsUUID * uuid)
177 unsigned int time_low, time_mid, time_hi_and_version;
178 unsigned int clock_seq_hi_and_reserved, clock_seq_low;
179 unsigned int node[6];
182 i = sscanf(str, "%08x-%04x-%04x-%02x-%02x-%02x%02x%02x%02x%02x%02x",
183 &time_low, &time_mid, &time_hi_and_version,
184 &clock_seq_hi_and_reserved, &clock_seq_low, &node[0], &node[1],
185 &node[2], &node[3], &node[4], &node[5]);
189 uuid->time_low = time_low;
190 uuid->time_mid = time_mid;
191 uuid->time_hi_and_version = time_hi_and_version;
192 uuid->clock_seq_hi_and_reserved = clock_seq_hi_and_reserved;
193 uuid->clock_seq_low = clock_seq_low;
195 for (i = 0; i < 6; i++)
196 uuid->node[i] = node[i];
202 * Converts a UUID from binary representation to a string representation.
204 * @param[in] uuid pointer to a afsUUID
205 * @param[out] buf format work buffer
207 * @returns pointer to buffer containing string representation of "uuid"
211 afsUUID_to_string(const afsUUID * uuid, struct uuid_fmtbuf *buf)
213 memset(buf, 0, sizeof(*buf));
214 snprintf(buf->buffer, sizeof(buf->buffer),
215 "%08x-%04x-%04x-%02x-%02x-%02x%02x%02x%02x%02x%02x",
216 uuid->time_low, uuid->time_mid, uuid->time_hi_and_version,
217 (unsigned char)uuid->clock_seq_hi_and_reserved,
218 (unsigned char)uuid->clock_seq_low, (unsigned char)uuid->node[0],
219 (unsigned char)uuid->node[1], (unsigned char)uuid->node[2],
220 (unsigned char)uuid->node[3], (unsigned char)uuid->node[4],
221 (unsigned char)uuid->node[5]);
228 afs_uuid_create(afsUUID * uuid)
231 UuidCreate((UUID *) uuid);
232 #else /* AFS_NT40_ENV */
233 uuid_address_t eaddr;
234 afs_int32 got_no_time = 0, code;
236 if (!uuid_init_done) {
238 u_short seedp[4], seed = 0;
244 * Generating our 'seed' value
246 * We start with the current time, but, since the resolution of clocks is
247 * system hardware dependent (eg. Ultrix is 10 msec.) and most likely
248 * coarser than our resolution (10 usec) we 'mixup' the bits by xor'ing
249 * all the bits together. This will have the effect of involving all of
250 * the bits in the determination of the seed value while remaining system
251 * independent. Then for good measure to ensure a unique seed when there
252 * are multiple processes creating UUID's on a system, we add in the PID.
254 uuid__get_os_time(&t);
255 memcpy(&seedp, &t, sizeof(seedp));
260 #if defined(KERNEL) && defined(AFS_XBSD_ENV)
261 rand_irand += seed + (afs_uint32) curproc->p_pid;
262 #elif defined(UKERNEL)
263 rand_irand += seed + (afs_uint32) osi_getpid();
265 rand_irand += seed + (afs_uint32) getpid();
267 uuid__get_os_time(&time_last);
268 clock_seq = true_random();
270 if (afs_winsockInit() < 0) {
271 return WSAGetLastError();
276 if ((code = uuid_get_address(&eaddr)))
277 return code; /* get our hardware network address */
279 /* get the current time */
280 uuid__get_os_time(&time_now);
282 * check that our clock hasn't gone backwards and handle it
283 * accordingly with clock_seq
284 * check that we're not generating uuid's faster than we
285 * can accommodate with our uuid_time_adjust fudge factor
287 if ((code = time_cmp(&time_now, &time_last)) == -1) {
288 /* A clock_seq value of 0 indicates that it hasn't been initialized. */
289 if (clock_seq == 0) {
290 clock_seq = true_random();
292 clock_seq = (clock_seq + 1) & 0x3fff;
294 clock_seq = clock_seq + 1;
295 uuid_time_adjust = 0;
296 } else if (code == 1) {
297 uuid_time_adjust = 0;
299 if (uuid_time_adjust == 0x7fff) /* spin while we wait for the clock to tick */
304 } while (got_no_time);
305 time_last.lo = time_now.lo;
306 time_last.hi = time_now.hi;
307 if (uuid_time_adjust != 0) {
308 if (time_now.lo & 0x80000000) {
309 time_now.lo += uuid_time_adjust;
310 if (!(time_now.lo & 0x80000000))
313 time_now.lo += uuid_time_adjust;
315 uuid->time_low = time_now.lo;
316 uuid->time_mid = time_now.hi & 0x0000ffff;
317 uuid->time_hi_and_version = (time_now.hi & 0x0fff0000) >> 16;
318 uuid->time_hi_and_version |= (1 << 12);
319 uuid->clock_seq_low = clock_seq & 0xff;
320 uuid->clock_seq_hi_and_reserved = (clock_seq & 0x3f00) >> 8;
321 uuid->clock_seq_hi_and_reserved |= 0x80;
322 memcpy(uuid->node, &eaddr, sizeof(uuid_address_t));
323 #endif /* AFS_NT40_ENV */
328 afs_uuid_hash(afsUUID * uuid)
330 short c0 = 0, c1 = 0, x, y;
331 char *next_uuid = (char *)uuid;
334 * For speed lets unroll the following loop:
336 * for (i = 0; i < UUID_K_LENGTH; i++)
338 * c0 = c0 + *next_uuid++;
342 c0 = c0 + *next_uuid++;
344 c0 = c0 + *next_uuid++;
346 c0 = c0 + *next_uuid++;
348 c0 = c0 + *next_uuid++;
350 c0 = c0 + *next_uuid++;
352 c0 = c0 + *next_uuid++;
354 c0 = c0 + *next_uuid++;
356 c0 = c0 + *next_uuid++;
358 c0 = c0 + *next_uuid++;
360 c0 = c0 + *next_uuid++;
362 c0 = c0 + *next_uuid++;
364 c0 = c0 + *next_uuid++;
366 c0 = c0 + *next_uuid++;
368 c0 = c0 + *next_uuid++;
370 c0 = c0 + *next_uuid++;
372 c0 = c0 + *next_uuid++;
374 /* Calculate the value for "First octet" of the hash */
379 /* Calculate the value for "second octet" of the hash */
384 return ((y * 256) + x);
389 extern struct interfaceAddr afs_cb_interface;
392 uuid_get_address(uuid_address_p_t addr)
394 memcpy(addr->eaddr, &afs_cb_interface.addr_in[0], 4);
395 addr->eaddr[4] = 0xaa;
396 addr->eaddr[5] = 0x77;
401 uuid__get_os_time(uuid_time_t * os_time)
406 os_time->hi = tp.tv_sec;
407 os_time->lo = tp.tv_usec * 10;
412 char hostName1[128] = "localhost";
414 uuid_get_address(uuid_address_p_t addr)
417 afs_uint32 addr1 = 0;
418 struct hostent *he = NULL;
420 code = gethostname(hostName1, 64);
422 he = gethostbyname(hostName1);
425 memcpy(&addr1, he->h_addr_list[0], 4);
439 addr1 = ntohl(addr1);
440 memcpy(addr->eaddr, &addr1, 4);
441 addr->eaddr[4] = 0xaa;
442 addr->eaddr[5] = 0x77;
444 printf("uuid_get_address: %02x-%02x-%02x-%02x-%02x-%02x\n",
445 addr->eaddr[0], addr->eaddr[1], addr->eaddr[2], addr->eaddr[3],
446 addr->eaddr[4], addr->eaddr[5]);
452 uuid__get_os_time(uuid_time_t * os_time)
456 if (gettimeofday(&tp, NULL)) {
457 perror("uuid__get_time");
460 os_time->hi = tp.tv_sec;
461 os_time->lo = tp.tv_usec * 10;