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Opcodes A-7
or (bit-wise OR)
Description:
Pops two values from the stack and pushes the bit-wise OR of these values back
onto the stack. The size of the operands and the result are determined by the
contents of the stack.
Storage Needed:
1 byte
xor (bit-wise exclusive-OR)
Description:
Pops two values from the stack and pushes the bit-wise
exclusive-OR of these
values back onto the stack. The size of the operands and the result are
determined by the contents of the stack.
Storage Needed:
1 byte
not
Description:
A byte is popped from the stack; if it is non-zero, a zero byte is pushed back onto
the stack. Otherwise, a non-zero byte is pushed back onto the stack.
Storage Needed:
1 byte
accept
Description:
Conditionally accepts the packet being examined. A byte is popped from the
stack. If it is non-zero, the packet is accepted, and evaluation of the filter ends
immediately; otherwise, filter evaluation continues with the next instruction.
Storage Needed:
1 byte