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/*
* PostgreSQL type definitions for MAC addresses.
*
* $Id: mac.c,v 1.3 1998/02/26 04:27:44 momjian Exp $
*/
#include <stdio.h>
#include <postgres.h>
#include <utils/palloc.h>
#include "mac.h"
/*
* This is the internal storage format for MAC addresses:
*/
typedef struct macaddr
{
unsigned char a;
unsigned char b;
unsigned char c;
unsigned char d;
unsigned char e;
unsigned char f;
} macaddr;
/*
* Various forward declarations:
*/
macaddr *macaddr_in(char *str);
char *macaddr_out(macaddr * addr);
bool macaddr_lt(macaddr * a1, macaddr * a2);
bool macaddr_le(macaddr * a1, macaddr * a2);
bool macaddr_eq(macaddr * a1, macaddr * a2);
bool macaddr_ge(macaddr * a1, macaddr * a2);
bool macaddr_gt(macaddr * a1, macaddr * a2);
bool macaddr_ne(macaddr * a1, macaddr * a2);
int4 macaddr_cmp(macaddr * a1, macaddr * a2);
text *macaddr_manuf(macaddr * addr);
/*
* Utility macros used for sorting and comparing:
*/
#define hibits(addr) \
((unsigned long)((addr->a<<16)|(addr->b<<8)|(addr->c)))
#define lobits(addr) \
((unsigned long)((addr->c<<16)|(addr->e<<8)|(addr->f)))
/*
* MAC address reader. Accepts several common notations.
*/
macaddr *
macaddr_in(char *str)
{
int a,
b,
c,
d,
e,
f;
macaddr *result;
int count;
if (strlen(str) > 0)
{
count = sscanf(str, "%x:%x:%x:%x:%x:%x", &a, &b, &c, &d, &e, &f);
if (count != 6)
count = sscanf(str, "%x-%x-%x-%x-%x-%x", &a, &b, &c, &d, &e, &f);
if (count != 6)
count = sscanf(str, "%2x%2x%2x:%2x%2x%2x", &a, &b, &c, &d, &e, &f);
if (count != 6)
count = sscanf(str, "%2x%2x%2x-%2x%2x%2x", &a, &b, &c, &d, &e, &f);
if (count != 6)
count = sscanf(str, "%2x%2x.%2x%2x.%2x%2x", &a, &b, &c, &d, &e, &f);
if (count != 6)
{
elog(ERROR, "macaddr_in: error in parsing \"%s\"", str);
return (NULL);
}
if ((a < 0) || (a > 255) || (b < 0) || (b > 255) ||
(c < 0) || (c > 255) || (d < 0) || (d > 255) ||
(e < 0) || (e > 255) || (f < 0) || (f > 255))
{
elog(ERROR, "macaddr_in: illegal address \"%s\"", str);
return (NULL);
}
}
else
{
a = b = c = d = e = f = 0; /* special case for missing
* address */
}
result = (macaddr *) palloc(sizeof(macaddr));
result->a = a;
result->b = b;
result->c = c;
result->d = d;
result->e = e;
result->f = f;
return (result);
}
/*
* MAC address output function. Fixed format.
*/
char *
macaddr_out(macaddr * addr)
{
char *result;
if (addr == NULL)
return (NULL);
result = (char *) palloc(32);
if ((hibits(addr) > 0) || (lobits(addr) > 0))
{
sprintf(result, "%02x:%02x:%02x:%02x:%02x:%02x",
addr->a, addr->b, addr->c, addr->d, addr->e, addr->f);
}
else
{
result[0] = 0; /* special case for missing address */
}
return (result);
}
/*
* Boolean tests.
*/
bool
macaddr_lt(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) < hibits(a2)) ||
((hibits(a1) == hibits(a2)) && lobits(a1) < lobits(a2)));
};
bool
macaddr_le(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) < hibits(a2)) ||
((hibits(a1) == hibits(a2)) && lobits(a1) <= lobits(a2)));
};
bool
macaddr_eq(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) == hibits(a2)) && (lobits(a1) == lobits(a2)));
};
bool
macaddr_ge(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) > hibits(a2)) ||
((hibits(a1) == hibits(a2)) && lobits(a1) >= lobits(a2)));
};
bool
macaddr_gt(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) > hibits(a2)) ||
((hibits(a1) == hibits(a2)) && lobits(a1) > lobits(a2)));
};
bool
macaddr_ne(macaddr * a1, macaddr * a2)
{
return ((hibits(a1) != hibits(a2)) || (lobits(a1) != lobits(a2)));
};
/*
* Comparison function for sorting:
*/
int4
macaddr_cmp(macaddr * a1, macaddr * 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;
}
/*
* The special manufacturer fetching function. See "mac.h".
*/
text *
macaddr_manuf(macaddr * addr)
{
manufacturer *manuf;
int length;
text *result;
for (manuf = manufacturers; manuf->name != NULL; manuf++)
{
if ((manuf->a == addr->a) &&
(manuf->b == addr->b) &&
(manuf->c == addr->c))
break;
}
if (manuf->name == NULL)
{
result = palloc(VARHDRSZ + 1);
memset(result, 0, VARHDRSZ + 1);
VARSIZE(result) = VARHDRSZ + 1;
}
else
{
length = strlen(manuf->name) + 1;
result = palloc(length + VARHDRSZ);
memset(result, 0, length + VARHDRSZ);
VARSIZE(result) = length + VARHDRSZ;
memcpy(VARDATA(result), manuf->name, length);
}
return result;
}
/*
* eof
*/
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