bcc8b14ef6
SUSv3 <netinet/in.h> defines struct sockaddr_in6, and all targeted Unix systems have it. Windows has it in <ws2ipdef.h>. Remove the configure probe, the macro and a small amount of dead code. Also remove a mention of IPv6-less builds from the documentation, since there aren't any. This is similar to commits f5580882 and 077bf2f2 for Unix sockets. Even though AF_INET6 is an "optional" component of SUSv3, there are no known modern operating system without it, and it seems even less likely to be omitted from future systems than AF_UNIX. Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/CA+hUKGKErNfhmvb_H0UprEmp4LPzGN06yR2_0tYikjzB-2ECMw@mail.gmail.com
150 lines
4.7 KiB
C
150 lines
4.7 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) 1996-2022, 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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* src/include/utils/inet.h
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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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#include "fmgr.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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* We use these values for the "family" field.
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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 did not have the appropriate address family (like
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* inet6 addresses when AF_INET6 wasn't present) but didn't cause a
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* dump/reload requirement. Pre-7.4 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 in front of the struct type
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* depicted above. This struct depicts what we actually have in memory
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* in "uncompressed" cases. Note that since the maximum data size is only
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* 18 bytes, INET/CIDR will invariably be stored into tuples using the
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* 1-byte-header varlena format. However, we have to be prepared to cope
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* with the 4-byte-header format too, because various code may helpfully
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* try to "decompress" 1-byte-header datums.
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*/
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typedef struct
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{
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char vl_len_[4]; /* Do not touch this field directly! */
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inet_struct inet_data;
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} inet;
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/*
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* Access macros. We use VARDATA_ANY so that we can process short-header
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* varlena values without detoasting them. This requires a trick:
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* VARDATA_ANY assumes the varlena header is already filled in, which is
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* not the case when constructing a new value (until SET_INET_VARSIZE is
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* called, which we typically can't do till the end). Therefore, we
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* always initialize the newly-allocated value to zeroes (using palloc0).
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* A zero length word will look like the not-1-byte case to VARDATA_ANY,
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* and so we correctly construct an uncompressed value.
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*
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* Note that ip_addrsize(), ip_maxbits(), and SET_INET_VARSIZE() require
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* the family field to be set correctly.
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*/
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#define ip_family(inetptr) \
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(((inet_struct *) VARDATA_ANY(inetptr))->family)
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#define ip_bits(inetptr) \
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(((inet_struct *) VARDATA_ANY(inetptr))->bits)
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#define ip_addr(inetptr) \
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(((inet_struct *) VARDATA_ANY(inetptr))->ipaddr)
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#define ip_addrsize(inetptr) \
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(ip_family(inetptr) == PGSQL_AF_INET ? 4 : 16)
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#define ip_maxbits(inetptr) \
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(ip_family(inetptr) == PGSQL_AF_INET ? 32 : 128)
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#define SET_INET_VARSIZE(dst) \
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SET_VARSIZE(dst, VARHDRSZ + offsetof(inet_struct, ipaddr) + \
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ip_addrsize(dst))
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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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* This is the internal storage format for MAC8 addresses:
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*/
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typedef struct macaddr8
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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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unsigned char g;
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unsigned char h;
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} macaddr8;
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/*
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* fmgr interface macros
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*/
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#define DatumGetInetPP(X) ((inet *) PG_DETOAST_DATUM_PACKED(X))
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#define InetPGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_INET_PP(n) DatumGetInetPP(PG_GETARG_DATUM(n))
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#define PG_RETURN_INET_P(x) return InetPGetDatum(x)
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/* obsolescent variants */
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#define DatumGetInetP(X) ((inet *) PG_DETOAST_DATUM(X))
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#define PG_GETARG_INET_P(n) DatumGetInetP(PG_GETARG_DATUM(n))
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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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/* macaddr8 is a fixed-length pass-by-reference datatype */
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#define DatumGetMacaddr8P(X) ((macaddr8 *) DatumGetPointer(X))
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#define Macaddr8PGetDatum(X) PointerGetDatum(X)
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#define PG_GETARG_MACADDR8_P(n) DatumGetMacaddr8P(PG_GETARG_DATUM(n))
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#define PG_RETURN_MACADDR8_P(x) return Macaddr8PGetDatum(x)
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/*
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* Support functions in network.c
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*/
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extern inet *cidr_set_masklen_internal(const inet *src, int bits);
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extern int bitncmp(const unsigned char *l, const unsigned char *r, int n);
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extern int bitncommon(const unsigned char *l, const unsigned char *r, int n);
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#endif /* INET_H */
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