# mark set ip saddr map { 10.2.3.2 : 0x0000002a, 10.2.3.1 : 0x00000017} __map%d test-ip4 b __map%d test-ip4 0 element 0203020a : 0000002a 0 [end] element 0103020a : 00000017 0 [end] ip test-ip4 input [ payload load 4b @ network header + 12 => reg 1 ] [ lookup reg 1 set __map%d dreg 1 ] [ meta set mark with reg 1 ] # mark set ip hdrlength map { 5 : 0x00000017, 4 : 0x00000001} __map%d test-ip4 b __map%d test-ip4 0 element 00000005 : 00000017 0 [end] element 00000004 : 00000001 0 [end] ip test-ip4 input [ payload load 1b @ network header + 0 => reg 1 ] [ bitwise reg 1 = ( reg 1 & 0x0000000f ) ^ 0x00000000 ] [ lookup reg 1 set __map%d dreg 1 ] [ meta set mark with reg 1 ]