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https://issues.apache.org/jira/browse/PROTON-2104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17563904#comment-17563904
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Andrew Stitcher commented on PROTON-2104:
-----------------------------------------
{quote}
First, proton::container::impl::start_connection calls pn_proactor_addr, which
transforms the original [ip]:port into ip:port, thus irrecoverably destroying
the IPv6 address structure.
{quote}
Strangely the IPv6 address is not irrecoverably lost! Because
{{pn_proactor_addr}} always appends a ':' and the port, you can recover the
host and port by simply looking for the last ':' and splitting the address
using it. This is in fact what {{pni_parse_addr}} actually does.
The one issue that still exists is that you cannot use the IPv6 literal syntax
(as in the syntax with '[', ']') to specify a literal IPv6 address to
{{pn_proactor_connect2}}.
> [cpp] Error specifying url with IPv6 literal host address
> ---------------------------------------------------------
>
> Key: PROTON-2104
> URL: https://issues.apache.org/jira/browse/PROTON-2104
> Project: Qpid Proton
> Issue Type: Bug
> Components: cpp-binding
> Affects Versions: proton-c-0.29.0, proton-c-0.33.0
> Reporter: Charles E. Rolke
> Assignee: Andrew Stitcher
> Priority: Major
>
> C++ examples simple_send and simple_recv accept IPv6 loopback address [::1]
> but have issues with other apparently legal addresses.
> These work on my system:
> {noformat}
> ping6 fe80::c662:ab36:1ef1:1596
> ping6 fe80::c662:ab36:1ef1:1596%wlp4s0
> ping6 fe80:0000:0000:0000:c662:ab36:1ef1:1596
> {noformat}
> Wrapping the host part in square brackets and sending that address to
> simple_send fails:
> {noformat}
> ./simple_send -a [fe80::c662:ab36:1ef1:1596]:5672/abc
> proton:io: Invalid argument - on connect fe80::c662:ab36:1ef1:1596:5672
> {noformat}
> All three variants of the address that work with ping6 fail with the same
> error on the simple_send command line.
>
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