toggle

If flowbit is set, unset it. If it is unset, set it. Toggle every bit specified or toggle all the bits in group (Group must be present). This keyword always returns true.

Syntax:  
   flowbits:toggle,bats
   flowbits:toggle,all,group
   
Usage:
   flowbits: toggle, bit1&bit2
   If bit1 is 0 and bit2 is 1 before, after this rule, bit1 is 1 and bit2 is 0.
   
   flowbits:toggle,all,doc
   Toggle all the bits in group doc as described above.