SSL_SESSION_get_compress_id.3ossl - Man Page

 #include <openssl/ssl.h>

 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s);

If compression has been negotiated for an ssl session then SSL_SESSION_get_compress_id() will return the id for the compression method or 0 otherwise. The only built-in supported compression method is zlib which has an id of 1.

SSL_SESSION_get_compress_id() returns the id of the compression method or 0 if none.

ssl(7)

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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>.