+/**
+ * Push IPv6 header to buffer
+ *
+ * @param vm - vlib_main
+ * @param b - buffer to write the header to
+ * @param src - source IP
+ * @param dst - destination IP
+ * @param prot - payload proto
+ *
+ * @return - pointer to start of IP header
+ */
+always_inline void *
+vlib_buffer_push_ip6 (vlib_main_t * vm, vlib_buffer_t * b,
+ ip6_address_t * src, ip6_address_t * dst, int proto)
+{
+ return vlib_buffer_push_ip6_custom (vm, b, src, dst, proto,
+ 0 /* flow label */ );
+
+}
+
+always_inline u32
+vlib_buffer_get_ip6_fib_index (vlib_buffer_t * b)
+{
+ u32 fib_index, sw_if_index;
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ fib_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ return (fib_index == (u32) ~ 0) ?
+ vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) : fib_index;
+}