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Diffstat (limited to '')
-rw-r--r-- | src/libnetdata/uuid/uuid.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/libnetdata/uuid/uuid.h b/src/libnetdata/uuid/uuid.h new file mode 100644 index 000000000..cde457616 --- /dev/null +++ b/src/libnetdata/uuid/uuid.h @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_UUID_H +#define NETDATA_UUID_H + +// for compatibility with libuuid +typedef unsigned char nd_uuid_t[16]; + +// for quickly managing it as 2x 64-bit numbers +typedef struct _uuid { + union { + nd_uuid_t uuid; + struct { + uint64_t hig64; + uint64_t low64; + } parts; + }; +} ND_UUID; + +#ifdef __GNUC__ +#define ND_UUID_DEFINE(name,u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15) \ + static const nd_uuid_t name __attribute__ ((unused)) = {u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15} +#else +#define ND_UUID_DEFINE(name,u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15) \ + static const nd_uuid_t name = {u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12,u13,u14,u15} +#endif + +static const ND_UUID UUID_ZERO = (ND_UUID){ { .parts = { .hig64 = 0, .low64 = 0 } }}; +ND_UUID_DEFINE(streaming_from_child_msgid, 0xed,0x4c,0xdb, 0x8f, 0x1b, 0xeb, 0x4a, 0xd3, 0xb5, 0x7c, 0xb3, 0xca, 0xe2, 0xd1, 0x62, 0xfa); +ND_UUID_DEFINE(streaming_to_parent_msgid, 0x6e, 0x2e, 0x38, 0x39, 0x06, 0x76, 0x48, 0x96, 0x8b, 0x64, 0x60, 0x45, 0xdb, 0xf2, 0x8d, 0x66); +ND_UUID_DEFINE(health_alert_transition_msgid, 0x9c, 0xe0, 0xcb, 0x58, 0xab, 0x8b, 0x44, 0xdf, 0x82, 0xc4, 0xbf, 0x1a, 0xd9, 0xee, 0x22, 0xde); + +// this is also defined in alarm-notify.sh.in +ND_UUID_DEFINE(health_alert_notification_msgid, 0x6d, 0xb0, 0x01, 0x8e, 0x83, 0xe3, 0x43, 0x20, 0xae, 0x2a, 0x65, 0x9d, 0x78, 0x01, 0x9f, 0xb7); + +ND_UUID UUID_generate_from_hash(const void *payload, size_t payload_len); + +#define UUIDeq(a, b) ((a).parts.hig64 == (b).parts.hig64 && (a).parts.low64 == (b).parts.low64) + +static inline ND_UUID uuid2UUID(const nd_uuid_t uu1) { + // uu1 may not be aligned, so copy it to the output + ND_UUID copy; + memcpy(copy.uuid, uu1, sizeof(nd_uuid_t)); + return copy; +} + +#ifndef UUID_STR_LEN +// CentOS 7 has older version that doesn't define this +// same goes for MacOS +#define UUID_STR_LEN 37 +#endif + +#define UUID_COMPACT_STR_LEN 33 + +void uuid_unparse_lower_compact(const nd_uuid_t uuid, char *out); +int uuid_parse_compact(const char *in, nd_uuid_t uuid); + +int uuid_parse_flexi(const char *in, nd_uuid_t uuid); +#define uuid_parse(in, uuid) uuid_parse_flexi(in, uuid) + +static inline int hex_char_to_int(char c) { + if (c >= '0' && c <= '9') return c - '0'; + if (c >= 'a' && c <= 'f') return c - 'a' + 10; + if (c >= 'A' && c <= 'F') return c - 'A' + 10; + return -1; // Invalid hexadecimal character +} + +static inline void nd_uuid_clear(nd_uuid_t uu) { + memset(uu, 0, sizeof(nd_uuid_t)); +} + +// Netdata does not need to sort UUIDs lexicographically and this kind +// of sorting does not need to be portable between little/big endian. +// So, any kind of sorting will work, as long as it compares UUIDs. +// The fastest possible, is good enough. +static inline int nd_uuid_compare(const nd_uuid_t uu1, const nd_uuid_t uu2) { + // IMPORTANT: + // uu1 or uu2 may not be aligned to word boundaries on this call, + // so casting this to a struct may give SIGBUS on some architectures. + return memcmp(uu1, uu2, sizeof(nd_uuid_t)); +} + +static inline void nd_uuid_copy(nd_uuid_t dst, const nd_uuid_t src) { + memcpy(dst, src, sizeof(nd_uuid_t)); +} + +static inline bool nd_uuid_eq(const nd_uuid_t uu1, const nd_uuid_t uu2) { + return nd_uuid_compare(uu1, uu2) == 0; +} + +static inline int nd_uuid_is_null(const nd_uuid_t uu) { + return nd_uuid_compare(uu, UUID_ZERO.uuid) == 0; +} + +void nd_uuid_unparse_lower(const nd_uuid_t uuid, char *out); +void nd_uuid_unparse_upper(const nd_uuid_t uuid, char *out); + +#define uuid_is_null(uu) nd_uuid_is_null(uu) +#define uuid_clear(uu) nd_uuid_clear(uu) +#define uuid_compare(uu1, uu2) nd_uuid_compare(uu1, uu2) +#define uuid_copy(dst, src) nd_uuid_copy(dst, src) +#define uuid_eq(uu1, uu2) nd_uuid_eq(uu1, uu2) + +#define uuid_generate(out) os_uuid_generate(out) +#define uuid_generate_random(out) os_uuid_generate_random(out) +#define uuid_generate_time(out) os_uuid_generate_time(out) + +#define uuid_unparse(uu, out) nd_uuid_unparse_lower(uu, out) +#define uuid_unparse_lower(uu, out) nd_uuid_unparse_lower(uu, out) +#define uuid_unparse_upper(uu, out) nd_uuid_unparse_upper(uu, out) + +#endif //NETDATA_UUID_H |