[#BIO_recvmmsg]
= BIO_recvmmsg
:mrdocs:

Receive multiple datagram messages through a BIO (recvmmsg‐style).

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BIO_recvmmsg(
    xref:BIO.adoc[BIO]* b,
    xref:BIO_MSG.adoc[BIO_MSG]* msg,
    size_t stride,
    size_t num_msg,
    uint64_t flags,
    size_t* msgs_processed);
----

== Return Value

1 on success, 0 on retry/failure (check BIO_should_retry()).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| Datagram‐capable BIO.
| *msg*
| Array of BIO_MSG descriptors to fill.
| *stride*
| Byte stride between consecutive BIO_MSG elements.
| *num_msg*
| Number of messages that may be received into `msg.`
| *flags*
| Implementation‐specific receive flags (often 0).
| *msgs_processed*
| Receives how many messages were filled.
|===


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