Fix probelms with DTLS when no packets are pending.

When using DTLS you might run into the situation where no packets
are pending, so SSL_read returns len=0. On a TLS connection this
means that the connection was closed, but on DTLS it does not
(a DTLS connection cannot be closed in the usual sense).
This commit fixes a bug introduced by c8d23f3.

Conflicts:
	openssl/src/ssl/mod.rs

1 files changed, 6 insertions, 1 deletions

diff --git a/openssl/src/ssl/tests.rs b/openssl/src/ssl/tests.rs
index 8401836d..3a8ffa2b 100644
--- a/openssl/src/ssl/tests.rs
+++ b/openssl/src/ssl/tests.rs
@@ -51,7 +51,7 @@ macro_rules! run_test(
             use std::net::TcpStream;
             use ssl;
             use ssl::SslMethod;
-            use ssl::{SslContext, SslStream, VerifyCallback};
+            use ssl::{SslContext, Ssl, SslStream, VerifyCallback};
             use ssl::SSL_VERIFY_PEER;
             use crypto::hash::Type::SHA256;
             use x509::X509StoreContext;
@@ -86,6 +86,11 @@ run_test!(new_sslstream, |method, stream| {
     SslStream::connect_generic(&SslContext::new(method).unwrap(), stream).unwrap();
 });
 
+run_test!(get_ssl_method, |method, _| {
+    let ssl = Ssl::new(&SslContext::new(method).unwrap()).unwrap();
+    assert_eq!(ssl.get_ssl_method(), Some(method));
+});
+
 run_test!(verify_untrusted, |method, stream| {
     let mut ctx = SslContext::new(method).unwrap();
     ctx.set_verify(SSL_VERIFY_PEER, None);