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Diffstat (limited to 'src/backend/utils/adt/mac8.c')
| -rw-r--r-- | src/backend/utils/adt/mac8.c | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/src/backend/utils/adt/mac8.c b/src/backend/utils/adt/mac8.c new file mode 100644 index 0000000..b7b2968 --- /dev/null +++ b/src/backend/utils/adt/mac8.c @@ -0,0 +1,577 @@ +/*------------------------------------------------------------------------- + * + * mac8.c + * PostgreSQL type definitions for 8 byte (EUI-64) MAC addresses. + * + * EUI-48 (6 byte) MAC addresses are accepted as input and are stored in + * EUI-64 format, with the 4th and 5th bytes set to FF and FE, respectively. + * + * Output is always in 8 byte (EUI-64) format. + * + * The following code is written with the assumption that the OUI field + * size is 24 bits. + * + * Portions Copyright (c) 1998-2020, PostgreSQL Global Development Group + * + * IDENTIFICATION + * src/backend/utils/adt/mac8.c + * + *------------------------------------------------------------------------- + */ + +#include "postgres.h" + +#include "common/hashfn.h" +#include "libpq/pqformat.h" +#include "utils/builtins.h" +#include "utils/inet.h" + +/* + * Utility macros used for sorting and comparing: + */ +#define hibits(addr) \ + ((unsigned long)(((addr)->a<<24) | ((addr)->b<<16) | ((addr)->c<<8) | ((addr)->d))) + +#define lobits(addr) \ + ((unsigned long)(((addr)->e<<24) | ((addr)->f<<16) | ((addr)->g<<8) | ((addr)->h))) + +static unsigned char hex2_to_uchar(const unsigned char *ptr, const unsigned char *str); + +static const signed char hexlookup[128] = { + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, + -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, +}; + +/* + * hex2_to_uchar - convert 2 hex digits to a byte (unsigned char) + * + * This will ereport() if the end of the string is reached ('\0' found), or if + * either character is not a valid hex digit. + * + * ptr is the pointer to where the digits to convert are in the string, str is + * the entire string, which is used only for error reporting. + */ +static inline unsigned char +hex2_to_uchar(const unsigned char *ptr, const unsigned char *str) +{ + unsigned char ret = 0; + signed char lookup; + + /* Handle the first character */ + if (*ptr > 127) + goto invalid_input; + + lookup = hexlookup[*ptr]; + if (lookup < 0) + goto invalid_input; + + ret = lookup << 4; + + /* Move to the second character */ + ptr++; + + if (*ptr > 127) + goto invalid_input; + + lookup = hexlookup[*ptr]; + if (lookup < 0) + goto invalid_input; + + ret += lookup; + + return ret; + +invalid_input: + ereport(ERROR, + (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION), + errmsg("invalid input syntax for type %s: \"%s\"", "macaddr8", + str))); + + /* We do not actually reach here */ + return 0; +} + +/* + * MAC address (EUI-48 and EUI-64) reader. Accepts several common notations. + */ +Datum +macaddr8_in(PG_FUNCTION_ARGS) +{ + const unsigned char *str = (unsigned char *) PG_GETARG_CSTRING(0); + const unsigned char *ptr = str; + macaddr8 *result; + unsigned char a = 0, + b = 0, + c = 0, + d = 0, + e = 0, + f = 0, + g = 0, + h = 0; + int count = 0; + unsigned char spacer = '\0'; + + /* skip leading spaces */ + while (*ptr && isspace(*ptr)) + ptr++; + + /* digits must always come in pairs */ + while (*ptr && *(ptr + 1)) + { + /* + * Attempt to decode each byte, which must be 2 hex digits in a row. + * If either digit is not hex, hex2_to_uchar will throw ereport() for + * us. Either 6 or 8 byte MAC addresses are supported. + */ + + /* Attempt to collect a byte */ + count++; + + switch (count) + { + case 1: + a = hex2_to_uchar(ptr, str); + break; + case 2: + b = hex2_to_uchar(ptr, str); + break; + case 3: + c = hex2_to_uchar(ptr, str); + break; + case 4: + d = hex2_to_uchar(ptr, str); + break; + case 5: + e = hex2_to_uchar(ptr, str); + break; + case 6: + f = hex2_to_uchar(ptr, str); + break; + case 7: + g = hex2_to_uchar(ptr, str); + break; + case 8: + h = hex2_to_uchar(ptr, str); + break; + default: + /* must be trailing garbage... */ + ereport(ERROR, + (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION), + errmsg("invalid input syntax for type %s: \"%s\"", "macaddr8", + str))); + } + + /* Move forward to where the next byte should be */ + ptr += 2; + + /* Check for a spacer, these are valid, anything else is not */ + if (*ptr == ':' || *ptr == '-' || *ptr == '.') + { + /* remember the spacer used, if it changes then it isn't valid */ + if (spacer == '\0') + spacer = *ptr; + + /* Have to use the same spacer throughout */ + else if (spacer != *ptr) + ereport(ERROR, + (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION), + errmsg("invalid input syntax for type %s: \"%s\"", "macaddr8", + str))); + + /* move past the spacer */ + ptr++; + } + + /* allow trailing whitespace after if we have 6 or 8 bytes */ + if (count == 6 || count == 8) + { + if (isspace(*ptr)) + { + while (*++ptr && isspace(*ptr)); + + /* If we found a space and then non-space, it's invalid */ + if (*ptr) + ereport(ERROR, + (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION), + errmsg("invalid input syntax for type %s: \"%s\"", "macaddr8", + str))); + } + } + } + + /* Convert a 6 byte MAC address to macaddr8 */ + if (count == 6) + { + h = f; + g = e; + f = d; + + d = 0xFF; + e = 0xFE; + } + else if (count != 8) + ereport(ERROR, + (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION), + errmsg("invalid input syntax for type %s: \"%s\"", "macaddr8", + str))); + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + + result->a = a; + result->b = b; + result->c = c; + result->d = d; + result->e = e; + result->f = f; + result->g = g; + result->h = h; + + PG_RETURN_MACADDR8_P(result); +} + +/* + * MAC8 address (EUI-64) output function. Fixed format. + */ +Datum +macaddr8_out(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + char *result; + + result = (char *) palloc(32); + + snprintf(result, 32, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", + addr->a, addr->b, addr->c, addr->d, + addr->e, addr->f, addr->g, addr->h); + + PG_RETURN_CSTRING(result); +} + +/* + * macaddr8_recv - converts external binary format(EUI-48 and EUI-64) to macaddr8 + * + * The external representation is just the eight bytes, MSB first. + */ +Datum +macaddr8_recv(PG_FUNCTION_ARGS) +{ + StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); + macaddr8 *addr; + + addr = (macaddr8 *) palloc0(sizeof(macaddr8)); + + addr->a = pq_getmsgbyte(buf); + addr->b = pq_getmsgbyte(buf); + addr->c = pq_getmsgbyte(buf); + + if (buf->len == 6) + { + addr->d = 0xFF; + addr->e = 0xFE; + } + else + { + addr->d = pq_getmsgbyte(buf); + addr->e = pq_getmsgbyte(buf); + } + + addr->f = pq_getmsgbyte(buf); + addr->g = pq_getmsgbyte(buf); + addr->h = pq_getmsgbyte(buf); + + PG_RETURN_MACADDR8_P(addr); +} + +/* + * macaddr8_send - converts macaddr8(EUI-64) to binary format + */ +Datum +macaddr8_send(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + StringInfoData buf; + + pq_begintypsend(&buf); + pq_sendbyte(&buf, addr->a); + pq_sendbyte(&buf, addr->b); + pq_sendbyte(&buf, addr->c); + pq_sendbyte(&buf, addr->d); + pq_sendbyte(&buf, addr->e); + pq_sendbyte(&buf, addr->f); + pq_sendbyte(&buf, addr->g); + pq_sendbyte(&buf, addr->h); + + PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); +} + + +/* + * macaddr8_cmp_internal - comparison function for sorting: + */ +static int32 +macaddr8_cmp_internal(macaddr8 *a1, macaddr8 *a2) +{ + if (hibits(a1) < hibits(a2)) + return -1; + else if (hibits(a1) > hibits(a2)) + return 1; + else if (lobits(a1) < lobits(a2)) + return -1; + else if (lobits(a1) > lobits(a2)) + return 1; + else + return 0; +} + +Datum +macaddr8_cmp(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_INT32(macaddr8_cmp_internal(a1, a2)); +} + +/* + * Boolean comparison functions. + */ + +Datum +macaddr8_lt(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) < 0); +} + +Datum +macaddr8_le(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) <= 0); +} + +Datum +macaddr8_eq(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) == 0); +} + +Datum +macaddr8_ge(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) >= 0); +} + +Datum +macaddr8_gt(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) > 0); +} + +Datum +macaddr8_ne(PG_FUNCTION_ARGS) +{ + macaddr8 *a1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *a2 = PG_GETARG_MACADDR8_P(1); + + PG_RETURN_BOOL(macaddr8_cmp_internal(a1, a2) != 0); +} + +/* + * Support function for hash indexes on macaddr8. + */ +Datum +hashmacaddr8(PG_FUNCTION_ARGS) +{ + macaddr8 *key = PG_GETARG_MACADDR8_P(0); + + return hash_any((unsigned char *) key, sizeof(macaddr8)); +} + +Datum +hashmacaddr8extended(PG_FUNCTION_ARGS) +{ + macaddr8 *key = PG_GETARG_MACADDR8_P(0); + + return hash_any_extended((unsigned char *) key, sizeof(macaddr8), + PG_GETARG_INT64(1)); +} + +/* + * Arithmetic functions: bitwise NOT, AND, OR. + */ +Datum +macaddr8_not(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + result->a = ~addr->a; + result->b = ~addr->b; + result->c = ~addr->c; + result->d = ~addr->d; + result->e = ~addr->e; + result->f = ~addr->f; + result->g = ~addr->g; + result->h = ~addr->h; + + PG_RETURN_MACADDR8_P(result); +} + +Datum +macaddr8_and(PG_FUNCTION_ARGS) +{ + macaddr8 *addr1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *addr2 = PG_GETARG_MACADDR8_P(1); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + result->a = addr1->a & addr2->a; + result->b = addr1->b & addr2->b; + result->c = addr1->c & addr2->c; + result->d = addr1->d & addr2->d; + result->e = addr1->e & addr2->e; + result->f = addr1->f & addr2->f; + result->g = addr1->g & addr2->g; + result->h = addr1->h & addr2->h; + + PG_RETURN_MACADDR8_P(result); +} + +Datum +macaddr8_or(PG_FUNCTION_ARGS) +{ + macaddr8 *addr1 = PG_GETARG_MACADDR8_P(0); + macaddr8 *addr2 = PG_GETARG_MACADDR8_P(1); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + result->a = addr1->a | addr2->a; + result->b = addr1->b | addr2->b; + result->c = addr1->c | addr2->c; + result->d = addr1->d | addr2->d; + result->e = addr1->e | addr2->e; + result->f = addr1->f | addr2->f; + result->g = addr1->g | addr2->g; + result->h = addr1->h | addr2->h; + + PG_RETURN_MACADDR8_P(result); +} + +/* + * Truncation function to allow comparing macaddr8 manufacturers. + */ +Datum +macaddr8_trunc(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + + result->a = addr->a; + result->b = addr->b; + result->c = addr->c; + result->d = 0; + result->e = 0; + result->f = 0; + result->g = 0; + result->h = 0; + + PG_RETURN_MACADDR8_P(result); +} + +/* + * Set 7th bit for modified EUI-64 as used in IPv6. + */ +Datum +macaddr8_set7bit(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + + result->a = addr->a | 0x02; + result->b = addr->b; + result->c = addr->c; + result->d = addr->d; + result->e = addr->e; + result->f = addr->f; + result->g = addr->g; + result->h = addr->h; + + PG_RETURN_MACADDR8_P(result); +} + +/*---------------------------------------------------------- + * Conversion operators. + *---------------------------------------------------------*/ + +Datum +macaddrtomacaddr8(PG_FUNCTION_ARGS) +{ + macaddr *addr6 = PG_GETARG_MACADDR_P(0); + macaddr8 *result; + + result = (macaddr8 *) palloc0(sizeof(macaddr8)); + + result->a = addr6->a; + result->b = addr6->b; + result->c = addr6->c; + result->d = 0xFF; + result->e = 0xFE; + result->f = addr6->d; + result->g = addr6->e; + result->h = addr6->f; + + + PG_RETURN_MACADDR8_P(result); +} + +Datum +macaddr8tomacaddr(PG_FUNCTION_ARGS) +{ + macaddr8 *addr = PG_GETARG_MACADDR8_P(0); + macaddr *result; + + result = (macaddr *) palloc0(sizeof(macaddr)); + + if ((addr->d != 0xFF) || (addr->e != 0xFE)) + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("macaddr8 data out of range to convert to macaddr"), + errhint("Only addresses that have FF and FE as values in the " + "4th and 5th bytes from the left, for example " + "xx:xx:xx:ff:fe:xx:xx:xx, are eligible to be converted " + "from macaddr8 to macaddr."))); + + result->a = addr->a; + result->b = addr->b; + result->c = addr->c; + result->d = addr->f; + result->e = addr->g; + result->f = addr->h; + + PG_RETURN_MACADDR_P(result); +} |