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-rw-r--r--include/net/ip6_route.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 4a808de7c0f..68f67836e14 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -37,6 +37,24 @@ struct route_info {
#define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
#define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
+/*
+ * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate
+ * between IPV6_ADDR_PREFERENCES socket option values
+ * IPV6_PREFER_SRC_TMP = 0x1
+ * IPV6_PREFER_SRC_PUBLIC = 0x2
+ * IPV6_PREFER_SRC_COA = 0x4
+ * and above RT6_LOOKUP_F_SRCPREF_xxx flags.
+ */
+static inline int rt6_srcprefs2flags(unsigned int srcprefs)
+{
+ /* No need to bitmask because srcprefs have only 3 bits. */
+ return srcprefs << 3;
+}
+
+static inline unsigned int rt6_flags2srcprefs(int flags)
+{
+ return (flags >> 3) & 7;
+}
extern void ip6_route_input(struct sk_buff *skb);