1027456 - Reserve discovery address / port if needed

Status: RESOLVED FIXED

(DevTools Graveyard :: WebIDE, defect)

Description

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

We may need to reserve a multicast address and/or port with IANA for our service discovery mechanism.

Comment 1

[Paul Rouget [:paul]]

Ryan, can you explain what IANA is, why we need that, how we request an address and/or port?

Comment 2

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

(In reply to Paul Rouget [:paul] (slow to respond. Ping me on IRC) from comment #1)
> Ryan, can you explain what IANA is, why we need that, how we request an
> address and/or port?

Sure, IANA is the Internet Assigned Numbers Authority[1].  They maintain a registry of multicast addresses[2], and we may need to register ours to ensure that someone else does not collide with us in a real world setting, since things would fall apart pretty fast if they did.

There are various type of address blocks, so I am still reading up to verify we would want to register.  There is a mostly straightforward form[3] to apply for an address.

[1]: http://www.iana.org/
[2]: http://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml
[3]: http://www.iana.org/form/multicast-ipv4

Comment 3

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

My reading of the IANA allocation rules suggests it's best to request an address, so I've completed the allocation request form.  Waiting to hear back from them.

With our own address, the port would not matter, so no allocation is needed there.

Comment 4

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

IANA has assigned the address 224.0.0.115 for this protocol.

Comment 5

[Paul Rouget [:paul]]

\o/

Thank you. Should we close this bug?

Comment 6

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

Attachment: Use assigned multicast address for discovery

Just have to tweak the address.

Try: https://tbpl.mozilla.org/?tree=Try&rev=dd47db013beb

Comment 7

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/integration/fx-team/rev/5dbd8de0373e

Comment 8

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/5dbd8de0373e