[#BIO_find_type]
= BIO_find_type
:mrdocs:

Walk a BIO chain and return the first BIO whose method type matches `bio_type.`

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
BIO_find_type(
    xref:BIO.adoc[BIO]* b,
    int bio_type);
----

== Return Value

Matching BIO in the chain, or NULL if none matches.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| Starting BIO in the chain (may be a filter or source/sink).
| *bio_type*
| BIO_TYPE_* mask or exact type to match.
|===


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