diff options
Diffstat (limited to 'e2fsprogs/old_e2fsprogs/uuid/gen_uuid.c')
| -rw-r--r-- | e2fsprogs/old_e2fsprogs/uuid/gen_uuid.c | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/e2fsprogs/old_e2fsprogs/uuid/gen_uuid.c b/e2fsprogs/old_e2fsprogs/uuid/gen_uuid.c deleted file mode 100644 index 4310c17db..000000000 --- a/e2fsprogs/old_e2fsprogs/uuid/gen_uuid.c +++ /dev/null @@ -1,304 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * gen_uuid.c --- generate a DCE-compatible uuid - * - * Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o. - * - * %Begin-Header% - * 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% - */ - -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <errno.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/file.h> -#include <sys/time.h> -#ifdef HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif -#include <sys/socket.h> -#ifdef HAVE_SYS_SOCKIO_H -#include <sys/sockio.h> -#endif -#ifdef HAVE_NET_IF_H -#include <net/if.h> -#endif -#ifdef HAVE_NETINET_IN_H -#include <netinet/in.h> -#endif -#ifdef HAVE_NET_IF_DL_H -#include <net/if_dl.h> -#endif - -#include "uuidP.h" - -#ifdef HAVE_SRANDOM -#define srand(x) srandom(x) -#define rand() random() -#endif - -static int get_random_fd(void) -{ - struct timeval tv; - static int fd = -2; - int i; - - if (fd == -2) { - gettimeofday(&tv, 0); - fd = open("/dev/urandom", O_RDONLY); - if (fd == -1) - fd = open("/dev/random", O_RDONLY | O_NONBLOCK); - srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec); - } - /* Crank the random number generator a few times */ - gettimeofday(&tv, 0); - for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--) - rand(); - return fd; -} - - -/* - * Generate a series of random bytes. Use /dev/urandom if possible, - * and if not, use srandom/random. - */ -static void get_random_bytes(void *buf, int nbytes) -{ - int i, n = nbytes, fd = get_random_fd(); - int lose_counter = 0; - unsigned char *cp = (unsigned char *) buf; - - if (fd >= 0) { - while (n > 0) { - i = read(fd, cp, n); - if (i <= 0) { - if (lose_counter++ > 16) - break; - continue; - } - n -= i; - cp += i; - lose_counter = 0; - } - } - - /* - * 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; -} - -/* - * Get the ethernet hardware address, if we can find it... - */ -static int get_node_id(unsigned char *node_id) -{ -#ifdef HAVE_NET_IF_H - int sd; - struct ifreq ifr, *ifrp; - struct ifconf ifc; - 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 - * just sizeof(struct ifreq) - */ -#ifdef HAVE_SA_LEN -#ifndef max -#define max(a,b) ((a) > (b) ? (a) : (b)) -#endif -#define ifreq_size(i) max(sizeof(struct ifreq),\ - sizeof((i).ifr_name)+(i).ifr_addr.sa_len) -#else -#define ifreq_size(i) sizeof(struct ifreq) -#endif /* HAVE_SA_LEN*/ - - sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); - if (sd < 0) { - return -1; - } - memset(buf, 0, sizeof(buf)); - ifc.ifc_len = sizeof(buf); - ifc.ifc_buf = buf; - if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0) { - close(sd); - return -1; - } - n = ifc.ifc_len; - for (i = 0; i < n; i+= ifreq_size(*ifrp) ) { - ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i); - strncpy_IFNAMSIZ(ifr.ifr_name, ifrp->ifr_name); -#ifdef SIOCGIFHWADDR - if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0) - continue; - a = (unsigned char *) &ifr.ifr_hwaddr.sa_data; -#else -#ifdef SIOCGENADDR - 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 - * address - */ - 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]) - continue; - if (node_id) { - memcpy(node_id, a, 6); - close(sd); - return 1; - } - } - close(sd); -#endif - return 0; -} - -/* Assume that the gettimeofday() has microsecond granularity */ -#define MAX_ADJUSTMENT 10 - -static int get_clock(uint32_t *clock_high, uint32_t *clock_low, uint16_t *ret_clock_seq) -{ - static int adjustment = 0; - static struct timeval last = {0, 0}; - static uint16_t clock_seq; - struct timeval tv; - unsigned long long clock_reg; - -try_again: - gettimeofday(&tv, 0); - if ((last.tv_sec == 0) && (last.tv_usec == 0)) { - get_random_bytes(&clock_seq, sizeof(clock_seq)); - clock_seq &= 0x3FFF; - last = tv; - last.tv_sec--; - } - if ((tv.tv_sec < last.tv_sec) || - ((tv.tv_sec == last.tv_sec) && - (tv.tv_usec < last.tv_usec))) { - clock_seq = (clock_seq+1) & 0x3FFF; - adjustment = 0; - last = tv; - } else if ((tv.tv_sec == last.tv_sec) && - (tv.tv_usec == last.tv_usec)) { - if (adjustment >= MAX_ADJUSTMENT) - goto try_again; - adjustment++; - } else { - 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_high = clock_reg >> 32; - *clock_low = clock_reg; - *ret_clock_seq = clock_seq; - return 0; -} - -void uuid_generate_time(uuid_t out) -{ - static unsigned char node_id[6]; - static int has_init = 0; - struct uuid uu; - uint32_t clock_mid; - - if (!has_init) { - if (get_node_id(node_id) <= 0) { - get_random_bytes(node_id, 6); - /* - * Set multicast bit, to prevent conflicts - * with IEEE 802 addresses obtained from - * network cards - */ - node_id[0] |= 0x01; - } - has_init = 1; - } - get_clock(&clock_mid, &uu.time_low, &uu.clock_seq); - uu.clock_seq |= 0x8000; - 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) -{ - uuid_t buf; - struct uuid uu; - - 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); -} - -/* - * This is the generic front-end to uuid_generate_random and - * uuid_generate_time. It uses uuid_generate_random only if - * /dev/urandom is available, since otherwise we won't have - * high-quality randomness. - */ -void uuid_generate(uuid_t out) -{ - if (get_random_fd() >= 0) - uuid_generate_random(out); - else - uuid_generate_time(out); -} |