: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