ssl: prevent encoded NPN advertised protocol list from being GCed

SSLContext#setup encodes the protocol list set in @npn_protocols into a
String. The String is passed to SSL_CTX_set_next_protos_advertised_cb()
and OpenSSL invokes the callback function with the String. However since
Ruby's GC can't find the reference to the String from the inside of
OpenSSL, it can be free'd before the callback is invoked. So store the
String in an instance variable to prevent this.

0 files changed, 0 insertions, 0 deletions