diff options
Diffstat (limited to 'capplets/file-types/libuuid/gen_uuid.c')
| -rw-r--r-- | capplets/file-types/libuuid/gen_uuid.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/capplets/file-types/libuuid/gen_uuid.c b/capplets/file-types/libuuid/gen_uuid.c deleted file mode 100644 index 0d08f356c..000000000 --- a/capplets/file-types/libuuid/gen_uuid.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * gen_uuid.c --- generate a DCE-compatible uuid - * - * Copyright (C) 1996, 1997 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <config.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif -#include <stdlib.h> -#include <string.h> -#include <fcntl.h> -#include <errno.h> -#include <sys/types.h> -#include <sys/time.h> -#include <sys/stat.h> -#include <sys/file.h> -#include <sys/ioctl.h> -#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 - -#include "uuidP.h" - -#ifdef HAVE_SRANDOM -#define srand(x) srandom(x) -#define rand() random() -#endif - -/* - * 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) -{ - static int fd = -2; - int i; - char *cp = (char *) buf; - - if (fd == -2) { - fd = open("/dev/urandom", O_RDONLY); - srand((getpid() << 16) ^ getuid() ^ time(0)); - } - if (fd >= 0) { - while (nbytes > 0) { - i = read(fd, cp, nbytes); - if (i < 0) { - if ((errno == EINTR) || (errno == EAGAIN)) - continue; - break; - } - nbytes -= i; - cp += i; - } - } - if (nbytes == 0) - return; - - /* XXX put something better here if no /dev/random! */ - for (i=0; i < nbytes; i++) - *cp++ = rand() & 0xFF; - return; - -} - -/* - * 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; - -/* - * 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*/ -#ifdef AF_INET6 - sd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP); - - /* If IPv6 fails then try with IPv4 socket. */ - if (sd < 0) -#endif - { - 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(*ifr) ) { - ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i); - strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ); -#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 - /* - * XXX we don't have a way of getting the hardware - * address - */ - close(sd); - return 0; -#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(guint32 *clock_high, guint32 *clock_low, guint16 *ret_clock_seq) -{ - static int adjustment = 0; - static struct timeval last = {0, 0}; - static guint16 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 &= 0x1FFF; - 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) & 0x1FFF; - adjustment = 0; - } 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; - - 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; - guint32 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] |= 0x80; - } - has_init = 1; - } - get_clock(&clock_mid, &uu.time_low, &uu.clock_seq); - uu.clock_seq |= 0x8000; - uu.time_mid = (guint16) clock_mid; - uu.time_hi_and_version = (clock_mid >> 16) | 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) -{ - static int has_random = -1; - - if (has_random < 0) { - if (access("/dev/urandom", R_OK) == 0) - has_random = 1; - else - has_random = 0; - } - if (has_random) - uuid_generate_random(out); - else - uuid_generate_time(out); -} - |