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Manpages SSL_connectSection: OpenSSL (3ssl)Updated: 0.9.6c Index Return to Main Contents NAMESSL_connect - initiate the TLS/SSL handshake with an TLS/SSL serverSYNOPSIS
#include <openssl/ssl.h> int SSL_connect(SSL *ssl); DESCRIPTIONSSL_connect() initiates the TLS/SSL handshake with a server. The communication channel must already have been set and assigned to the ssl by setting an underlying BIO.NOTESThe behaviour of SSL_connect() depends on the underlying BIO.If the underlying BIO is blocking, SSL_connect() will only return once the handshake has been finished or an error occurred. If the underlying BIO is non-blocking, SSL_connect() will also return when the underlying BIO could not satisfy the needs of SSL_connect() to continue the handshake. In this case a call to SSL_get_error() with the return value of SSL_connect() will yield SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE. The calling process then must repeat the call after taking appropriate action to satisfy the needs of SSL_connect(). The action depends on the underlying BIO. When using a non-blocking socket, nothing is to be done, but select() can be used to check for the required condition. When using a buffering BIO, like a BIO pair, data must be written into or retrieved out of the BIO before being able to continue. RETURN VALUESThe following return values can occur:
SEE ALSOSSL_get_error(3), SSL_accept(3), SSL_shutdown(3), ssl(3), bio(3), SSL_set_connect_state(3), SSL_CTX_new(3)
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