[#BIO_ADDR_service_string]
= BIO_ADDR_service_string
:mrdocs:

Format the service/port portion of a BIO_ADDR as an allocated string.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char*
BIO_ADDR_service_string(
    xref:BIO_ADDR.adoc[BIO_ADDR] const* ap,
    int numeric);
----

== Return Value

Newly allocated NUL‐terminated string; free with OPENSSL_free(), or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ap*
| Address to format.
| *numeric*
| Non‐zero to prefer a numeric port (NI_NUMERICSERV); 0 may use a service name.
|===


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