+always_inline void
+ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
+ u16 adj_packet_bytes, u32 * next, u32 * error)
+{
+ if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
+ {
+ *error = IP6_ERROR_MTU_EXCEEDED;
+ icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
+ adj_packet_bytes);
+ *next = IP6_REWRITE_NEXT_ICMP_ERROR;
+ }
+}
+