This function generates a version 7 UUID as per
draft-ietf-uuidrev-rfc4122bis-14.
---
include/haproxy/tools.h | 1 +
src/tools.c | 25 +++++++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/haproxy/tools.h b/include/haproxy/tools.h
index cbce218dc6..4e1a6dfa3f 100644
--- a/include/haproxy/tools.h
+++ b/include/haproxy/tools.h
@@ -1057,6 +1057,7 @@ int parse_dotted_uints(const char *s, unsigned int
**nums, size_t *sz);
/* PRNG */
void ha_generate_uuid_v4(struct buffer *output);
+void ha_generate_uuid_v7(struct buffer *output);
void ha_random_seed(const unsigned char *seed, size_t len);
void ha_random_jump96(uint32_t dist);
uint64_t ha_random64(void);
diff --git a/src/tools.c b/src/tools.c
index f3b095569a..114cbf6ddf 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -5605,6 +5605,31 @@ void ha_generate_uuid_v4(struct buffer *output)
(long long)((rnd[2] >> 14u) | ((uint64_t) rnd[3] << 18u))
& 0xFFFFFFFFFFFFull);
}
+/* Generates a draft-ietf-uuidrev-rfc4122bis-14 version 7 UUID into chunk
+ * <output> which must be at least 37 bytes large.
+ */
+void ha_generate_uuid_v7(struct buffer *output)
+{
+ uint32_t rnd[3];
+ uint64_t last;
+ uint64_t time;
+
+ time = (date.tv_sec * 1000) + (date.tv_usec / 1000);
+ last = ha_random64();
+ rnd[0] = last;
+ rnd[1] = last >> 32;
+
+ last = ha_random64();
+ rnd[2] = last;
+
+ chunk_printf(output, "%8.8x-%4.4x-%4.4x-%4.4x-%12.12llx",
+ (uint)(time >> 16u),
+ (uint)(time & 0xFFFF),
+ ((rnd[0] >> 16u) & 0xFFF) | 0x7000, // highest 4 bits
indicate the uuid version
+ (rnd[1] & 0x3FFF) | 0x8000, // the highest 2 bits
indicate the UUID variant (10),
+ (long long)((rnd[1] >> 14u) | ((uint64_t) rnd[2] << 18u))
& 0xFFFFFFFFFFFFull);
+}
+
/* only used by parse_line() below. It supports writing in place provided that
* <in> is updated to the next location before calling it. In that case, the
--
2.43.2
