if: Add a generic function to create an aliased address name

Reduces complexity between IPv4 and IPv6 and silences a warning
about potential string trunctaion if the LUN makes too big an
interface name.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/if.h b/src/if.h
index c8e406da..f10a8c37 100644
--- a/src/if.h
+++ b/src/if.h
@@ -129,6 +129,10 @@ int if_domtu(const struct interface *, short int);
 #define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
 int if_carrier(struct interface *);
 
+#ifdef ALIAS_ADDR
+int if_makealias(char *, size_t, const char *, int);
+#endif
+
 int if_carrier_os(struct interface *);
 int if_mtu_os(const struct interface *);