I have made a programmer following this: OpenSSL Read/Write Handshake data with Memory BIOBut now the function call SSL_do_handshake gets the error wrong version number, do you have any idea?Here is the sample code.client,SSL_set_bio(pssl, rbio, wbio); SSL_set_connect_state(pssl); SSL_do_handshake(pssl); length = BIO_read(wbio, buffer, length);server,SSL_CTX_load_verify_locations(global_sslctx , "cacerts.pem" , NULL); SSL_CTX_use_certificate_file( global_sslctx , "cert.pem" , SSL_FILETYPE_PEM); SSL_CTX_use_PrivateKey_file( global_sslctx , "cert.pem" , SSL_FILETYPE_PEM); BIO_write(SSL_get_wbio(pssl) , pdata , length); if (!SSL_is_init_finished(pssl)) { SSL_do_handshake(pssl); printf("%s" ,ERR_reason_error_string(ERR_get_error())); }And i have dumped the momery data of the client,16 03 01 00 de 01 00 00 da 03 01 9b dc 1e ef 4d f6 74 96 9b 8a 3f c0 3f de 37 4c 1b fa d7 d8 04 12 79 f9 bf 92 38 d8 59 c0 4f b4 00 00 68 c0 14 c0 0a c0 22 c0 21 00 39 00 38 00 88 00 87 c0 0f c0 05 00 zyf01...@gmail.com