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https://issues.apache.org/jira/browse/PROTON-1706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Ross updated PROTON-1706:
--------------------------------
Fix Version/s: (was: proton-c-0.19.0)
proton-c-0.20.0
> pn_listener_t provide access to actual listening port
> -----------------------------------------------------
>
> Key: PROTON-1706
> URL: https://issues.apache.org/jira/browse/PROTON-1706
> Project: Qpid Proton
> Issue Type: Improvement
> Components: proton-c
> Affects Versions: proton-c-0.18.1
> Reporter: Alan Conway
> Assignee: Alan Conway
> Fix For: proton-c-0.20.0
>
>
> Allow access to the actual listening port of a pn_listener_t so that the
> actual address is available when listening on port 0.
> Proposed API:
> {code}
> /**
> * Get the listening addresses of a listener.
> * A listener can have more than one address for several reasons:
> * - DNS host records may indicate more than one address
> * - On a multi-homed host, listening on the default host "" will listen on
> all local addresses.
> * - Some IPv4/IPV6 configurations may expand a single address into a v4/v6
> pair.
> *
> * @param l points to the listener
> * @param addrs an array of `pn_netaddr_t*` to be filled with pointers the
> listening addresses
> * Pointers are invalid after the listener closes (PN_LISTENER_CLOSE event
> is handled)
> * @param len is the length of the array @p addrs
> * @return The actual number of addresses used for listening. This may be:
> * - 0: addresses are unavailable.
> * - <= @p len: all addresses were copied to @p addrs, remaining entries
> were set to NULL.
> * - > @p len: the first @p len addresses were copied to @p addr.
> * `pn_netaddr_listen(l, NULL, 0)` returns the number of listening addresses.
> */
> PNP_EXTERN const size_t pn_netaddr_listen(pn_listener_t *l, pn_netaddr_t**
> addrs, size_t len);
> {code}
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