Issue #14612 has been updated by jeremyevans0 (Jeremy Evans).

Assignee set to akr (Akira Tanaka)
Status changed from Open to Assigned
File resolv-ipv6-lowercase.patch added

I agree that Ruby should consistently use lowercase for IPv6 addresses.  However, I don't think we should introduce a dependency on `ipaddr` to `resolv`.  For one, it changes how the IPv6 addresses with noncontiguous 0 components are displayed. Attached a simpler patch that just uses `%x` instead of `%X` in sprintf.

----------------------------------------
Bug #14612: IPv6 address inconsistency (downcase vs. upcase)
https://bugs.ruby-lang.org/issues/14612#change-78748

* Author: chucke (Tiago Cardoso)
* Status: Assigned
* Priority: Normal
* Assignee: akr (Akira Tanaka)
* Target version: 
* ruby -v: 2.5.0
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
I've noticed that sometimes ip addresses re shown using a-f characters in downcase, other times upcase. Here is a small script to show results:

```ruby
require "resolv"
require "socket"
puts TCPSocket.getaddress("nghttp2.org") #=> "2400:8902::f03c:91ff:fe69:a454"
puts Resolv.getaddresses("nghttp2.org") #=> ["139.162.123.134", "2400:8902::F03C:91FF:FE69:A454"]
```

Results might be system-dependent (I'm using Mac OS High Sierra).

This makes compare operations a bit harder. 

---Files--------------------------------
resolv-ipv6-to_s.patch (1.48 KB)
resolv-ipv6-lowercase.patch (1.82 KB)


-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>