From b434d7d43690d91a360403149fe01cb048e6657f Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Tue, 5 Sep 2017 17:11:25 +0200
Subject: [PATCH] shared: add nm_utils_ip_is_site_local()

---
 shared/nm-utils/nm-shared-utils.c | 21 +++++++++++++++++++++
 shared/nm-utils/nm-shared-utils.h |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/shared/nm-utils/nm-shared-utils.c b/shared/nm-utils/nm-shared-utils.c
index a1a310d0f..aa1e9f02d 100644
--- a/shared/nm-utils/nm-shared-utils.c
+++ b/shared/nm-utils/nm-shared-utils.c
@@ -146,6 +146,27 @@ _nm_utils_ip4_get_default_prefix (guint32 ip)
 	return 24;  /* Class C - 255.255.255.0 */
 }
 
+gboolean
+nm_utils_ip_is_site_local (int addr_family,
+                           const void *address)
+{
+	in_addr_t addr4;
+
+	switch (addr_family) {
+	case AF_INET:
+		/* RFC1918 private addresses
+		 * 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 */
+		addr4 = ntohl (*((const in_addr_t *) address));
+		return    (addr4 & 0xff000000) == 0x0a000000
+		       || (addr4 & 0xfff00000) == 0xac100000
+		       || (addr4 & 0xffff0000) == 0xc0a80000;
+	case AF_INET6:
+		return IN6_IS_ADDR_SITELOCAL (address);
+	default:
+		g_return_val_if_reached (FALSE);
+	}
+}
+
 /*****************************************************************************/
 
 /* _nm_utils_ascii_str_to_int64:
diff --git a/shared/nm-utils/nm-shared-utils.h b/shared/nm-utils/nm-shared-utils.h
index 419bc9d41..968f709ad 100644
--- a/shared/nm-utils/nm-shared-utils.h
+++ b/shared/nm-utils/nm-shared-utils.h
@@ -146,6 +146,9 @@ char **_nm_utils_strv_cleanup (char **strv,
 guint32 _nm_utils_ip4_prefix_to_netmask (guint32 prefix);
 guint32 _nm_utils_ip4_get_default_prefix (guint32 ip);
 
+gboolean nm_utils_ip_is_site_local (int addr_family,
+                                    const void *address);
+
 /*****************************************************************************/
 
 gint64 _nm_utils_ascii_str_to_int64 (const char *str, guint base, gint64 min, gint64 max, gint64 fallback);