This is an OpenWRT feed with a Linux kernel module implementing flexible NAT46.
Since 4856fa3 was merged, nat46 can be built by selecting the corresponding option under:
- Kernel modules -> Network Support -> kmod-nat46
The management of the NAT46 interfaces is done via the /proc/net/nat46/control file.
For more information about the module, take a look at the nat46/modules/README file.