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8d8bf12760
and rely exclusively on the SQL type system to tell the difference between the types. Prevent creation of invalid CIDR values via casting from INET or set_masklen() --- both of these operations now silently zero any bits to the right of the netmask. Remove duplicate CIDR comparison operators, letting the type rely on the INET operators instead.
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* inet.h
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* Declarations for operations on INET datatypes.
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*
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/utils/inet.h,v 1.22 2006/01/26 02:35:51 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef INET_H
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#define INET_H
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/*
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* This is the internal storage format for IP addresses
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* (both INET and CIDR datatypes):
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*/
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typedef struct
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{
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unsigned char family; /* PGSQL_AF_INET or PGSQL_AF_INET6 */
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unsigned char bits; /* number of bits in netmask */
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unsigned char ipaddr[16]; /* up to 128 bits of address */
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} inet_struct;
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/*
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* Referencing all of the non-AF_INET types to AF_INET lets us work on
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* machines which may not have the appropriate address family (like
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* inet6 addresses when AF_INET6 isn't present) but doesn't cause a
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* dump/reload requirement. Existing databases used AF_INET for the family
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* type on disk.
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*/
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#define PGSQL_AF_INET (AF_INET + 0)
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#define PGSQL_AF_INET6 (AF_INET + 1)
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/*
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* Both INET and CIDR addresses are represented within Postgres as varlena
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* objects, ie, there is a varlena header (basically a length word) in front
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* of the struct type depicted above.
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*
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* Although these types are variable-length, the maximum length
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* is pretty short, so we make no provision for TOASTing them.
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*/
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typedef struct varlena inet;
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/*
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* This is the internal storage format for MAC addresses:
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*/
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typedef struct macaddr
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{
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unsigned char a;
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unsigned char b;
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unsigned char c;
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unsigned char d;
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unsigned char e;
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unsigned char f;
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} macaddr;
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/*
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* fmgr interface macros
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*/
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#define DatumGetInetP(X) ((inet *) DatumGetPointer(X))
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#define InetPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_INET_P(n) DatumGetInetP(PG_GETARG_DATUM(n))
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#define PG_RETURN_INET_P(x) return InetPGetDatum(x)
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/* macaddr is a fixed-length pass-by-reference datatype */
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#define DatumGetMacaddrP(X) ((macaddr *) DatumGetPointer(X))
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#define MacaddrPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_MACADDR_P(n) DatumGetMacaddrP(PG_GETARG_DATUM(n))
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#define PG_RETURN_MACADDR_P(x) return MacaddrPGetDatum(x)
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#endif /* INET_H */
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