Added virtual Callback Interface

- extracted inner class TLS::Channel::Callbacks to stand-alone class
  TLS::Callbacks.
- provided default implementations for TLS::Callbacks members executing
  calls to std::function members for backward compatibility.
- applied changes to cli, tests and TLS::Channel related classes to be
  compatible with new interface.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/cli/tls_client.cpp b/src/cli/tls_client.cpp
index f6cc2e518..2e7daed6e 100644
--- a/src/cli/tls_client.cpp
+++ b/src/cli/tls_client.cpp
@@ -119,7 +119,7 @@ class TLS_Client final : public Command
             version = Botan::TLS::Protocol_Version::TLS_V11;
             }
 
-         Botan::TLS::Client client(Botan::TLS::Client::Callbacks(
+         Botan::TLS::Client client(Botan::TLS::Callbacks(
                                       socket_write,
                                       std::bind(&TLS_Client::process_data, this, _1, _2),
                                       std::bind(&TLS_Client::alert_received, this, _1),
diff --git a/src/cli/tls_server.cpp b/src/cli/tls_server.cpp
index c9f0b0a79..dffd30f66 100644
--- a/src/cli/tls_server.cpp
+++ b/src/cli/tls_server.cpp
@@ -107,7 +107,7 @@ class TLS_Server final : public Command
                      }
                };
 
-            Botan::TLS::Server server(Botan::TLS::Server::Callbacks(
+            Botan::TLS::Server server(Botan::TLS::Callbacks(
                                          socket_write,
                                          proc_fn,
                                          std::bind(&TLS_Server::alert_received, this, _1),