-b
The information are read or stored using binary format. The default format is a readable ASCII format, similar to pfctl.conf syntax.
-l
Lock state tables in the kernel.
-R filename
Restore information from filename and load it into the kernel. The state tables are locked at the beginning of this operation and unlocked once complete.
-r filename
Read information in from filename and load it into the kernel. This requires the state tables to have already been locked and does not change the lock once complete.
-u
Unlock state tables in the kernel.
-v
Provide a verbose description of what's being done.
-W filename
Write information from the kernel out to filename. The state tables are locked at the beginning of this operation and unlocked once complete.
-w filename
Write information from the kernel out to filename. This requires the state tables to have already been locked and does not change the lock once complete.