There is another way to obtain a sending port -- receive it in a message. This way both the sender and the receiver of that message have the same sending port pointing at the same receiving port.
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| Ports are an essential ingredients of the TCE model. They allow one to decouple the verification and authentication processes from regular operations on channels. By controlling the access to its receiving port, a thread can avoid other possibly malicious, threads tampering with its internal state. As we will see later, one is permitted to create more than one channel per connection, as well as to specify whether the channel is two-way, one-way or null. |