---
name: "SSL_get_rbio"
section: "3ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/SSL_get_rbio"
---

# SSL\_get\_rbio(3ssl)

get BIO linked to an SSL object

## NAME

SSL\_get\_rbio, SSL\_get\_wbio - get BIO linked to an SSL object

## SYNOPSIS

```
 #include <openssl/ssl.h>
 BIO *SSL_get_rbio(SSL *ssl);
 BIO *SSL_get_wbio(SSL *ssl);
```

## DESCRIPTION

**SSL\_get\_rbio()** and **SSL\_get\_wbio()** return pointers to the BIOs for the read or the write channel, which can be different. The reference count of the BIO is not incremented.

## RETURN VALUES

The following return values can occur:

- NULL

  No BIO was connected to the SSL object

- Any other pointer

  The BIO linked to **ssl**.

## SEE ALSO

**SSL\_set\_bio**(3), [**ssl**(7)](/ssl/7.md) , **bio**(7)

## COPYRIGHT

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License").  You may not use this file except in compliance with the License.  You can obtain a copy in the file LICENSE in the source distribution or at \<https://www.openssl.org/source/license.html\>.