Hi, I am writing an application, which uses DTLS over UDP. As I read in the OpenSSL-dev mailinglist (http://www.mail-archive.com/openssl-dev@openssl.org/msg28844.html) threads are recommended when handling multiple DTLS connections. In my case, however, when using threads, an SSL connection has to be accessed by multiple threads. So I am thinking about introducing a mutex for each SSL connection to prevent concurrent access by multiple threads.
Is it safe to call SSL_write() in thread B, while thread A is blocking at DTLSv1_listen() for the same SSL connection? Here comes an example for better understanding: THREAD A: ... while (DTLSv1_listen(ssl, &client_addr) <= 0); pthread_mutex_lock(&mutex); /* handle connection */ pthread_mutex_unlock(&mutex); ... THREAD B: ... pthread_mutex_lock(&mutex); SSL_write(ssl, buffer, len); pthread_mutex_unlock(&mutex); ... I am using OpenSSL 1.0.0d on Linux, patched with the DTLS bugfixes from http://sctp.fh-muenster.de/dtls-patches.html ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
