SSL_SET_BIO(3)

📦 version 4.4.0, in alpine 3.24, arch rolling

💖 SSL_SET_BIO — a libssl Library Functions Manual moment, bestie 💖

okay so this is the Library Functions Manual page for SSL_set_bio, brought to you by libssl, and it’s literally all about connecting an SSL object to a BIO. iconic. 💅

✨ NAME ✨

SSL_set_bio — connect the SSL object with a BIO

🎀 SYNOPSIS 🎀

library “libssl” libcrypto #include <openssl/ssl.h>

void
SSL_set_bio(SSL *ssl, BIO *rbio, BIO *wbio);

🦋 DESCRIPTION 🦋

SSL_set_bio() connects the BIOs rbio and wbio for the read and write operations of the TLS/SSL (encrypted) side of ssl. so rbio is handling the read vibe and wbio is handling the write vibe, no cap. 🫶

The SSL engine inherits the behaviour of rbio and wbio, respectively. so if a BIO is non-blocking, the ssl will also have non-blocking behaviour. it’s giving “you are who you surround yourself with” but for I/O. 😭

heads up bestie: if there was already a BIO connected to ssl, BIO_free(3) will be called (for both the reading and writing side, if different). so yeah, the old BIO gets cleaned up. don’t forget it. 💀

👑 SEE ALSO 👑

🌈 HISTORY 🌈

SSL_set_bio() first appeared in SSLeay 0.6.0 and has been available since OpenBSD 2.4. a whole historical moment, fr fr. ⭐

that’s the whole page, bestie — footer says Debian, June 8, 2025, SSL_SET_BIO(3). mwah 💋✨

📦 where this page comes from