--- /dev/null
+:PREROUTING,INPUT,FORWARD,OUTPUT,POSTROUTING
+*mangle
+-j TOS --set-tos 0x1f;=;OK
+-j TOS --set-tos 0x1f/0x1f;=;OK
+# maximum TOS is 0x1f (5 bits)
+# ERROR: should fail: iptables -A PREROUTING -t mangle -j TOS --set-tos 0xff
+# -j TOS --set-tos 0xff;;FAIL
+-j TOS --set-tos Minimize-Delay;-j TOS --set-tos 0x10;OK
+-j TOS --set-tos Maximize-Throughput;-j TOS --set-tos 0x08;OK
+-j TOS --set-tos Maximize-Reliability;-j TOS --set-tos 0x04;OK
+-j TOS --set-tos Minimize-Cost;-j TOS --set-tos 0x02;OK
+-j TOS --set-tos Normal-Service;-j TOS --set-tos 0x00;OK
+-j TOS --and-tos 0x12;-j TOS --set-tos 0x00/0xed;OK
+-j TOS --or-tos 0x12;-j TOS --set-tos 0x12/0x12;OK
+-j TOS --xor-tos 0x12;-j TOS --set-tos 0x12/0x00;OK
+-j TOS;;FAIL