1 files changed, 77 insertions, 0 deletions
diff --git a/src/util/inet_addr_sizes.c b/src/util/inet_addr_sizes.c
new file mode 100644
index 0000000..e788c22
--- /dev/null
+++ b/src/util/inet_addr_sizes.c
@@ -0,0 +1,77 @@
+/*++
+/* 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);
+    }
+}