--address vs --hostname

[yoshuawuyts]

In #2 we ended up going with --hostname to define the IP. But as per #2 (comment), this might not be the ideal option.

This is possibly too late, but re address vs hostname: my suggestion of address was intentional. This isn't a URL, and address is the name used in the socket API and the TCP RFC.

I'm opening up this issue to continue the discussion in a proper issue, rather than on a merged PR.

[yoshuawuyts]

@kamalmarhubi is it from this RFC? The word "address" doesn't seem to be clearly defined anywhere (whereas port seems a bit more clear). I found the following instances in the RFC:

---

Socket

It seems "port" is defined here as part of "address", which seems different from what we're trying to achieve.

socket
          An address which specifically includes a port identifier, that
          is, the concatenation of an Internet Address with a TCP port.

Source Address

I'm not sure what they mean here by "network and host identifiers". Would that include the port also, or is that just the IP?

Source Address
          The source address, usually the network and host identifiers.

Multiplexing

"addresses or ports" sounds like they're mutually exclusive, which doesn't seem to work with what we're trying to do either.

  Multiplexing:

    To allow for many processes within a single Host to use TCP
    communication facilities simultaneously, the TCP provides a set of
    addresses or ports within each host.  

[yoshuawuyts]

Oh I also just found this. Is this the part you're referring to?

2.7.  Connection Establishment and Clearing

  To identify the separate data streams that a TCP may handle, the TCP
  provides a port identifier.  Since port identifiers are selected
  independently by each TCP they might not be unique.  To provide for
  unique addresses within each TCP, we concatenate an internet address
  identifying the TCP with a port identifier to create a socket which
  will be unique throughout all networks connected together.

This does make it sound like address and port are counterparts. You're probably right that address then makes more sense!