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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_PLUGIN_PLUGIN_CREDENTIALS_H
#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_PLUGIN_PLUGIN_CREDENTIALS_H
#include <grpc/support/port_platform.h>
#include "src/core/lib/security/credentials/credentials.h"
extern grpc_core::TraceFlag grpc_plugin_credentials_trace;
// This type is forward declared as a C struct and we cannot define it as a
// class. Otherwise, compiler will complain about type mismatch due to
// -Wmismatched-tags.
struct grpc_plugin_credentials final : public grpc_call_credentials {
public:
struct pending_request {
bool cancelled;
struct grpc_plugin_credentials* creds;
grpc_credentials_mdelem_array* md_array;
grpc_closure* on_request_metadata;
struct pending_request* prev;
struct pending_request* next;
};
explicit grpc_plugin_credentials(grpc_metadata_credentials_plugin plugin);
~grpc_plugin_credentials() override;
bool get_request_metadata(grpc_polling_entity* pollent,
grpc_auth_metadata_context context,
grpc_credentials_mdelem_array* md_array,
grpc_closure* on_request_metadata,
grpc_error** error) override;
void cancel_get_request_metadata(grpc_credentials_mdelem_array* md_array,
grpc_error* error) override;
// Checks if the request has been cancelled.
// If not, removes it from the pending list, so that it cannot be
// cancelled out from under us.
// When this returns, r->cancelled indicates whether the request was
// cancelled before completion.
void pending_request_complete(pending_request* r);
private:
void pending_request_remove_locked(pending_request* pending_request);
grpc_metadata_credentials_plugin plugin_;
gpr_mu mu_;
pending_request* pending_requests_ = nullptr;
};
#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_PLUGIN_PLUGIN_CREDENTIALS_H */
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