Could "alt-loc" relation type point to other nodes?

mcocak / core-coap-protocol-negotiation

CoAP Protocol Negotiation draft

0 stars 1 forks source link

Could "alt-loc" relation type point to other nodes? #2

Open bsilverajan opened 8 years ago

bsilverajan commented 8 years ago

Is a server allowed to point to other locations other than its own for obtaining the resource representation?

It allows sleepy T0 nodes to inform clients where to retrieve a representation in case it's asleep
It allows load balancing, similar to HTTP Alternative Services
It introduces security risks, eg reflective DoS attack

bsilverajan commented 8 years ago

We actually don't have a way to NOT point to other nodes: A CoAP+SMS URI would have an authority component that has to differ from a CoAP+UDP URI. Similarly a multi-homed server may choose to expose CoAP+UDP and CoAP+TCP on different physical network interfaces, to overcome NAT traversal problems and so on.