As the tun interface operates on the network layer and above, I am not aware of any protocol that allows carrying more than 2^16 bytes in a single packet, which is the maximum value for an IP packet. The current implementation may lead some developers to choose the wrong value. Therefore, I suggest changing the mtu variable type from usize to u16 to prevent potential mistakes by developers.
xmh0511
commented
5 months ago
As the tun interface operates on the network layer and above, I am not aware of any protocol that allows carrying more than 2^16 bytes in a single packet, which is the maximum value for an IP packet. The current implementation may lead some developers to choose the wrong value. Therefore, I suggest changing the mtu variable type from usize to u16 to prevent potential mistakes by developers.