icmp/raw socket support

[tommikas]

The network-socket API doesn't seem to support either at the moment.
Would it be possible to add it, so for example ping could be implemented on top of the network-socket API?

[0xc0170]

cc @geky

[geky]

We accept patches ; )

This would be a good feature to have, but at the moment we are focusing on cementing the current network-socket API with minimal modifications.

[stevew817]

At least for NanoStack though, the ping functionality mentioned here is hardcoded in the stack and not exposed upwards. cc @SeppoTakalo

[nargetdev]

Would love to be able to operate directly with MAC addresses for application were reliability is zero tier priority

[SeppoTakalo]

@nargetdev Ethernet driver already provide interface for Network stack.
This network stack can be replaced with your own application, if you need to operate directly on Ethenet layer.

This is how Ethernet MAC tests work. They operate directly with Ethernet driver, bypassing the IP stack entirely. Please see: https://github.com/ARMmbed/mbed-os/tree/master/TESTS/network/emac