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/*++
/* NAME
/* inet_addr_sizes 3
/* SUMMARY
/* get network address size metrics
/* SYNOPSIS
/* #include <inet_addr_sizes.h>
/*
/* typedef struct {
/* .in +4
/* int af; /* network address family (binary) */
/* char *ipproto_str; /* IP protocol version (string) */
/* int addr_bitcount; /* bits per address */
/* int addr_bytecount; /* bytes per address */
/* int addr_strlen; /* address string length */
/* int addr_bitcount_strlen;/* addr_bitcount string length */
/* .in -4
/* } INET_ADDR_SIZES;
/*
/* const INET_ADDR_SIZES *inet_addr_sizes(int family)
/* DESCRIPTION
/* inet_addr_sizes() returns address size metrics for the
/* specified network address family, AF_INET or AF_INET6.
/* DIAGNOSTICS
/* inet_addr_sizes() returns a null pointer when the argument
/* specifies an unexpected address family.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/*--*/
/*
* System library.
*/
#include <sys_defs.h>
#include <string.h>
/*
* Utility library.
*/
#include <inet_addr_sizes.h>
#include <msg.h>
#include <myaddrinfo.h>
/*
* Stringify a numeric constant and use sizeof() to determine the resulting
* string length at compile time. Note that sizeof() includes a null
* terminator; the -1 corrects for that.
*/
#define _STRINGIFY(x) #x
#define _STRLEN(x) (sizeof(_STRINGIFY(x)) - 1)
static const INET_ADDR_SIZES table[] = {
{AF_INET, "IPv4", MAI_V4ADDR_BITS, MAI_V4ADDR_BYTES, INET_ADDRSTRLEN,
_STRLEN(MAI_V4ADDR_BITS)},
#ifdef HAS_IPV6
{AF_INET6, "IPv6", MAI_V6ADDR_BITS, MAI_V6ADDR_BYTES, INET6_ADDRSTRLEN,
_STRLEN(MAI_V6ADDR_BITS)},
#endif
};
/* inet_addr_sizes - get address size metrics for address family */
const INET_ADDR_SIZES *inet_addr_sizes(int af)
{
const INET_ADDR_SIZES *sp;
for (sp = table; /* see below */ ; sp++) {
if (sp >= table + sizeof(table) / sizeof(*table))
return (0);
if (sp->af == af)
return (sp);
}
}
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