IP_FW_SET_SWAP
i = do_range_cmd(IP_FW_SET_SWAP, &rt);
{ IP_FW_SET_SWAP, IP_FW3_OPVER_0, HDIR_SET, manage_sets_v0 },
case IP_FW_SET_SWAP:
{ IP_FW_SET_SWAP, IP_FW3_OPVER, HDIR_SET, manage_sets },