* Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU
- * Library General Public License.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
+ * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
* %End-Header%
*/
*/
#define _SVID_SOURCE
+#include "config.h"
+
+#ifdef _WIN32
+#define _WIN32_WINNT 0x0500
+#include <windows.h>
+#define UUID MYUUID
+#endif
+#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
+#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
+#endif
+#include <sys/wait.h>
#include <sys/stat.h>
+#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
+#ifdef HAVE_NET_IF_DL_H
+#include <net/if_dl.h>
+#endif
+#if defined(__linux__) && defined(HAVE_SYS_SYSCALL_H)
+#include <sys/syscall.h>
+#endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
#include "uuidP.h"
+#include "uuidd.h"
#ifdef HAVE_SRANDOM
#define srand(x) srandom(x)
#define rand() random()
#endif
+#ifdef TLS
+#define THREAD_LOCAL static TLS
+#else
+#define THREAD_LOCAL static
+#endif
+
+#if defined(__linux__) && defined(__NR_gettid) && defined(HAVE_JRAND48)
+#define DO_JRAND_MIX
+THREAD_LOCAL unsigned short jrand_seed[3];
+#endif
+
+#ifdef _WIN32
+static void gettimeofday (struct timeval *tv, void *dummy)
+{
+ FILETIME ftime;
+ uint64_t n;
+
+ GetSystemTimeAsFileTime (&ftime);
+ n = (((uint64_t) ftime.dwHighDateTime << 32)
+ + (uint64_t) ftime.dwLowDateTime);
+ if (n) {
+ n /= 10;
+ n -= ((369 * 365 + 89) * (uint64_t) 86400) * 1000000;
+ }
+
+ tv->tv_sec = n / 1000000;
+ tv->tv_usec = n % 1000000;
+}
+
+static int getuid (void)
+{
+ return 1;
+}
+#endif
+
static int get_random_fd(void)
{
struct timeval tv;
if (fd == -2) {
gettimeofday(&tv, 0);
+#ifndef _WIN32
fd = open("/dev/urandom", O_RDONLY);
if (fd == -1)
fd = open("/dev/random", O_RDONLY | O_NONBLOCK);
+ if (fd >= 0) {
+ i = fcntl(fd, F_GETFD);
+ if (i >= 0)
+ fcntl(fd, F_SETFD, i | FD_CLOEXEC);
+ }
+#endif
srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec);
+#ifdef DO_JRAND_MIX
+ jrand_seed[0] = getpid() ^ (tv.tv_sec & 0xFFFF);
+ jrand_seed[1] = getppid() ^ (tv.tv_usec & 0xFFFF);
+ jrand_seed[2] = (tv.tv_sec ^ tv.tv_usec) >> 16;
+#endif
}
/* Crank the random number generator a few times */
gettimeofday(&tv, 0);
*/
static void get_random_bytes(void *buf, int nbytes)
{
- int i, fd = get_random_fd();
+ int i, n = nbytes, fd = get_random_fd();
int lose_counter = 0;
- char *cp = (char *) buf;
+ unsigned char *cp = buf;
if (fd >= 0) {
- while (nbytes > 0) {
- i = read(fd, cp, nbytes);
+ while (n > 0) {
+ i = read(fd, cp, n);
if (i <= 0) {
if (lose_counter++ > 16)
break;
continue;
}
- nbytes -= i;
+ n -= i;
cp += i;
lose_counter = 0;
}
}
- /* XXX put something better here if no /dev/random! */
- for (i = 0; i < nbytes; i++)
- *cp++ = rand() & 0xFF;
+ /*
+ * We do this all the time, but this is the only source of
+ * randomness if /dev/random/urandom is out to lunch.
+ */
+ for (cp = buf, i = 0; i < nbytes; i++)
+ *cp++ ^= (rand() >> 7) & 0xFF;
+#ifdef DO_JRAND_MIX
+ {
+ unsigned short tmp_seed[3];
+
+ memcpy(tmp_seed, jrand_seed, sizeof(tmp_seed));
+ jrand_seed[2] = jrand_seed[2] ^ syscall(__NR_gettid);
+ for (cp = buf, i = 0; i < nbytes; i++)
+ *cp++ ^= (jrand48(tmp_seed) >> 7) & 0xFF;
+ memcpy(jrand_seed, tmp_seed,
+ sizeof(jrand_seed) - sizeof(unsigned short));
+ }
+#endif
+
return;
}
/*
* Get the ethernet hardware address, if we can find it...
+ *
+ * XXX for a windows version, probably should use GetAdaptersInfo:
+ * http://www.codeguru.com/cpp/i-n/network/networkinformation/article.php/c5451
+ * commenting out get_node_id just to get gen_uuid to compile under windows
+ * is not the right way to go!
*/
static int get_node_id(unsigned char *node_id)
{
char buf[1024];
int n, i;
unsigned char *a;
-
+#ifdef HAVE_NET_IF_DL_H
+ struct sockaddr_dl *sdlp;
+#endif
+
/*
* BSD 4.4 defines the size of an ifreq to be
* max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
- * However, under earlier systems, sa_len isn't present, so the size is
+ * However, under earlier systems, sa_len isn't present, so the size is
* just sizeof(struct ifreq)
*/
#ifdef HAVE_SA_LEN
return -1;
}
n = ifc.ifc_len;
- for (i = 0; i < n; i+= ifreq_size(*ifr) ) {
+ for (i = 0; i < n; i+= ifreq_size(*ifrp) ) {
ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
#ifdef SIOCGIFHWADDR
if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
continue;
a = (unsigned char *) ifr.ifr_enaddr;
+#else
+#ifdef HAVE_NET_IF_DL_H
+ sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr;
+ if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6))
+ continue;
+ a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen];
#else
/*
* XXX we don't have a way of getting the hardware
*/
close(sd);
return 0;
+#endif /* HAVE_NET_IF_DL_H */
#endif /* SIOCGENADDR */
#endif /* SIOCGIFHWADDR */
if (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5])
/* Assume that the gettimeofday() has microsecond granularity */
#define MAX_ADJUSTMENT 10
-static int get_clock(__u32 *clock_high, __u32 *clock_low, __u16 *ret_clock_seq)
+static int get_clock(uint32_t *clock_high, uint32_t *clock_low,
+ uint16_t *ret_clock_seq, int *num)
{
- static int adjustment = 0;
- static struct timeval last = {0, 0};
- static __u16 clock_seq;
+ THREAD_LOCAL int adjustment = 0;
+ THREAD_LOCAL struct timeval last = {0, 0};
+ THREAD_LOCAL int state_fd = -2;
+ THREAD_LOCAL FILE *state_f;
+ THREAD_LOCAL uint16_t clock_seq;
struct timeval tv;
- unsigned long long clock_reg;
-
-try_again:
- gettimeofday(&tv, 0);
+ struct flock fl;
+ uint64_t clock_reg;
+ mode_t save_umask;
+ int len;
+
+ if (state_fd == -2) {
+ save_umask = umask(0);
+ state_fd = open("/var/lib/libuuid/clock.txt",
+ O_RDWR|O_CREAT, 0660);
+ (void) umask(save_umask);
+ if (state_fd >= 0) {
+ state_f = fdopen(state_fd, "r+");
+ if (!state_f) {
+ close(state_fd);
+ state_fd = -1;
+ }
+ }
+ }
+ fl.l_type = F_WRLCK;
+ fl.l_whence = SEEK_SET;
+ fl.l_start = 0;
+ fl.l_len = 0;
+ fl.l_pid = 0;
+ if (state_fd >= 0) {
+ rewind(state_f);
+ while (fcntl(state_fd, F_SETLKW, &fl) < 0) {
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ fclose(state_f);
+ state_fd = -1;
+ break;
+ }
+ }
+ if (state_fd >= 0) {
+ unsigned int cl;
+ unsigned long tv1, tv2;
+ int a;
+
+ if (fscanf(state_f, "clock: %04x tv: %lu %lu adj: %d\n",
+ &cl, &tv1, &tv2, &a) == 4) {
+ clock_seq = cl & 0x3FFF;
+ last.tv_sec = tv1;
+ last.tv_usec = tv2;
+ adjustment = a;
+ }
+ }
+
if ((last.tv_sec == 0) && (last.tv_usec == 0)) {
get_random_bytes(&clock_seq, sizeof(clock_seq));
- clock_seq &= 0x1FFF;
- last = tv;
+ clock_seq &= 0x3FFF;
+ gettimeofday(&last, 0);
last.tv_sec--;
}
+
+try_again:
+ gettimeofday(&tv, 0);
if ((tv.tv_sec < last.tv_sec) ||
((tv.tv_sec == last.tv_sec) &&
(tv.tv_usec < last.tv_usec))) {
- clock_seq = (clock_seq+1) & 0x1FFF;
+ clock_seq = (clock_seq+1) & 0x3FFF;
adjustment = 0;
last = tv;
} else if ((tv.tv_sec == last.tv_sec) &&
adjustment = 0;
last = tv;
}
-
+
clock_reg = tv.tv_usec*10 + adjustment;
- clock_reg += ((unsigned long long) tv.tv_sec)*10000000;
- clock_reg += (((unsigned long long) 0x01B21DD2) << 32) + 0x13814000;
+ clock_reg += ((uint64_t) tv.tv_sec)*10000000;
+ clock_reg += (((uint64_t) 0x01B21DD2) << 32) + 0x13814000;
+
+ if (num && (*num > 1)) {
+ adjustment += *num - 1;
+ last.tv_usec += adjustment / 10;
+ adjustment = adjustment % 10;
+ last.tv_sec += last.tv_usec / 1000000;
+ last.tv_usec = last.tv_usec % 1000000;
+ }
+
+ if (state_fd > 0) {
+ rewind(state_f);
+ len = fprintf(state_f,
+ "clock: %04x tv: %016lu %08lu adj: %08d\n",
+ clock_seq, last.tv_sec, (long)last.tv_usec,
+ adjustment);
+ fflush(state_f);
+ if (ftruncate(state_fd, len) < 0) {
+ fprintf(state_f, " \n");
+ fflush(state_f);
+ }
+ rewind(state_f);
+ fl.l_type = F_UNLCK;
+ if (fcntl(state_fd, F_SETLK, &fl) < 0) {
+ fclose(state_f);
+ state_fd = -1;
+ }
+ }
*clock_high = clock_reg >> 32;
*clock_low = clock_reg;
return 0;
}
-void uuid_generate_time(uuid_t out)
+#if defined(USE_UUIDD) && defined(HAVE_SYS_UN_H)
+static ssize_t read_all(int fd, char *buf, size_t count)
+{
+ ssize_t ret;
+ ssize_t c = 0;
+ int tries = 0;
+
+ memset(buf, 0, count);
+ while (count > 0) {
+ ret = read(fd, buf, count);
+ if (ret <= 0) {
+ if ((errno == EAGAIN || errno == EINTR || ret == 0) &&
+ (tries++ < 5))
+ continue;
+ return c ? c : -1;
+ }
+ if (ret > 0)
+ tries = 0;
+ count -= ret;
+ buf += ret;
+ c += ret;
+ }
+ return c;
+}
+
+/*
+ * Close all file descriptors
+ */
+static void close_all_fds(void)
+{
+ int i, max;
+
+#if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
+ max = sysconf(_SC_OPEN_MAX);
+#elif defined(HAVE_GETDTABLESIZE)
+ max = getdtablesize();
+#elif defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
+ struct rlimit rl;
+
+ getrlimit(RLIMIT_NOFILE, &rl);
+ max = rl.rlim_cur;
+#else
+ max = OPEN_MAX;
+#endif
+
+ for (i=0; i < max; i++) {
+ close(i);
+ if (i <= 2)
+ open("/dev/null", O_RDWR);
+ }
+}
+#endif /* defined(USE_UUIDD) && defined(HAVE_SYS_UN_H) */
+
+#pragma GCC diagnostic push
+#if !defined(USE_UUIDD) || !defined(HAVE_SYS_UN_H)
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+/*
+ * Try using the uuidd daemon to generate the UUID
+ *
+ * Returns 0 on success, non-zero on failure.
+ */
+static int get_uuid_via_daemon(int op, uuid_t out, int *num)
+{
+#if defined(USE_UUIDD) && defined(HAVE_SYS_UN_H)
+ char op_buf[64];
+ int op_len;
+ int s;
+ ssize_t ret;
+ int32_t reply_len = 0, expected = 16;
+ struct sockaddr_un srv_addr;
+ struct stat st;
+ pid_t pid;
+ static const char *uuidd_path = UUIDD_PATH;
+ static int access_ret = -2;
+ static int start_attempts = 0;
+
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+ return -1;
+
+ srv_addr.sun_family = AF_UNIX;
+ strcpy(srv_addr.sun_path, UUIDD_SOCKET_PATH);
+
+ if (connect(s, (const struct sockaddr *) &srv_addr,
+ sizeof(struct sockaddr_un)) < 0) {
+ if (access_ret == -2)
+ access_ret = access(uuidd_path, X_OK);
+ if (access_ret == 0)
+ access_ret = stat(uuidd_path, &st);
+ if (access_ret == 0 && (st.st_mode & (S_ISUID | S_ISGID)) == 0)
+ access_ret = access(UUIDD_DIR, W_OK);
+ if (access_ret == 0 && start_attempts++ < 5) {
+ if ((pid = fork()) == 0) {
+ close_all_fds();
+ execl(uuidd_path, "uuidd", "-qT", "300",
+ (char *) NULL);
+ exit(1);
+ }
+ (void) waitpid(pid, 0, 0);
+ if (connect(s, (const struct sockaddr *) &srv_addr,
+ sizeof(struct sockaddr_un)) < 0)
+ goto fail;
+ } else
+ goto fail;
+ }
+ op_buf[0] = op;
+ op_len = 1;
+ if (op == UUIDD_OP_BULK_TIME_UUID) {
+ memcpy(op_buf+1, num, sizeof(*num));
+ op_len += sizeof(*num);
+ expected += sizeof(*num);
+ }
+
+ ret = write(s, op_buf, op_len);
+ if (ret < 1)
+ goto fail;
+
+ ret = read_all(s, (char *) &reply_len, sizeof(reply_len));
+ if (ret < 0)
+ goto fail;
+
+ if (reply_len != expected)
+ goto fail;
+
+ ret = read_all(s, op_buf, reply_len);
+
+ if (op == UUIDD_OP_BULK_TIME_UUID)
+ memcpy(op_buf+16, num, sizeof(int));
+
+ memcpy(out, op_buf, 16);
+
+ close(s);
+ return ((ret == expected) ? 0 : -1);
+
+fail:
+ close(s);
+#endif
+ return -1;
+}
+#pragma GCC diagnostic pop
+
+void uuid__generate_time(uuid_t out, int *num)
{
static unsigned char node_id[6];
static int has_init = 0;
struct uuid uu;
- __u32 clock_mid;
+ uint32_t clock_mid;
if (!has_init) {
if (get_node_id(node_id) <= 0) {
* with IEEE 802 addresses obtained from
* network cards
*/
- node_id[0] |= 0x80;
+ node_id[0] |= 0x01;
}
has_init = 1;
}
- get_clock(&clock_mid, &uu.time_low, &uu.clock_seq);
+ get_clock(&clock_mid, &uu.time_low, &uu.clock_seq, num);
uu.clock_seq |= 0x8000;
- uu.time_mid = (__u16) clock_mid;
- uu.time_hi_and_version = (clock_mid >> 16) | 0x1000;
+ uu.time_mid = (uint16_t) clock_mid;
+ uu.time_hi_and_version = ((clock_mid >> 16) & 0x0FFF) | 0x1000;
memcpy(uu.node, node_id, 6);
uuid_pack(&uu, out);
}
-void uuid_generate_random(uuid_t out)
+void uuid_generate_time(uuid_t out)
+{
+#ifdef TLS
+ THREAD_LOCAL int num = 0;
+ THREAD_LOCAL struct uuid uu;
+ THREAD_LOCAL time_t last_time = 0;
+ time_t now;
+
+ if (num > 0) {
+ now = time(0);
+ if (now > last_time+1)
+ num = 0;
+ }
+ if (num <= 0) {
+ num = 1000;
+ if (get_uuid_via_daemon(UUIDD_OP_BULK_TIME_UUID,
+ out, &num) == 0) {
+ last_time = time(0);
+ uuid_unpack(out, &uu);
+ num--;
+ return;
+ }
+ num = 0;
+ }
+ if (num > 0) {
+ uu.time_low++;
+ if (uu.time_low == 0) {
+ uu.time_mid++;
+ if (uu.time_mid == 0)
+ uu.time_hi_and_version++;
+ }
+ num--;
+ uuid_pack(&uu, out);
+ return;
+ }
+#else
+ if (get_uuid_via_daemon(UUIDD_OP_TIME_UUID, out, 0) == 0)
+ return;
+#endif
+
+ uuid__generate_time(out, 0);
+}
+
+
+void uuid__generate_random(uuid_t out, int *num)
{
uuid_t buf;
struct uuid uu;
+ int i, n;
- get_random_bytes(buf, sizeof(buf));
- uuid_unpack(buf, &uu);
+ if (!num || !*num)
+ n = 1;
+ else
+ n = *num;
- uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
- uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;
- uuid_pack(&uu, out);
+ for (i = 0; i < n; i++) {
+ get_random_bytes(buf, sizeof(buf));
+ uuid_unpack(buf, &uu);
+
+ uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
+ uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF)
+ | 0x4000;
+ uuid_pack(&uu, out);
+ out += sizeof(uuid_t);
+ }
+}
+
+void uuid_generate_random(uuid_t out)
+{
+ int num = 1;
+ /* No real reason to use the daemon for random uuid's -- yet */
+
+ uuid__generate_random(out, &num);
}
+
/*
* This is the generic front-end to uuid_generate_random and
* uuid_generate_time. It uses uuid_generate_random only if
projects / thirdparty / e2fsprogs.git / blobdiff