SSL_NEW(3SSL) | OpenSSL | SSL_NEW(3SSL) |
SSL_dup, SSL_new, SSL_up_ref - create an SSL structure for a connection
#include <openssl/ssl.h> SSL *SSL_dup(SSL *s); SSL *SSL_new(SSL_CTX *ctx); int SSL_up_ref(SSL *s);
SSL_new() creates a new SSL structure which is needed to hold the data for a TLS/SSL connection. The new structure inherits the settings of the underlying context ctx: connection method, options, verification settings, timeout settings. An SSL structure is reference counted. Creating an SSL structure for the first time increments the reference count. Freeing it (using SSL_free) decrements it. When the reference count drops to zero, any memory or resources allocated to the SSL structure are freed.
SSL_up_ref() increments the reference count for an existing SSL structure.
The function SSL_dup() creates and returns a new SSL structure from the same SSL_CTX that was used to create s. It additionally duplicates a subset of the settings in s into the new SSL object.
For SSL_dup() to work, the connection MUST be in its initial state and MUST NOT have yet started the SSL handshake. For connections that are not in their initial state SSL_dup() just increments an internal reference count and returns the same handle. It may be possible to use SSL_clear(3) to recycle an SSL handle that is not in its initial state for re-use, but this is best avoided. Instead, save and restore the session, if desired, and construct a fresh handle for each connection.
The subset of settings in s that are duplicated are:
The following return values can occur:
SSL_up_ref() returns 1 for success and 0 for failure.
SSL_free(3), SSL_clear(3), SSL_CTX_set_options(3), SSL_get_SSL_CTX(3), ssl(7)
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Licensed under the OpenSSL license (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>.
2023-09-13 | 1.1.1w |