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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <string.h>
#include "src/core/lib/channel/channel_stack.h"
#include "src/cpp/common/channel_filter.h"
#include <grpc++/impl/codegen/slice.h>
namespace grpc {
// MetadataBatch
grpc_linked_mdelem *MetadataBatch::AddMetadata(grpc_exec_ctx *exec_ctx,
const string &key,
const string &value) {
grpc_linked_mdelem *storage = new grpc_linked_mdelem;
memset(storage, 0, sizeof(grpc_linked_mdelem));
storage->md = grpc_mdelem_from_slices(exec_ctx, SliceFromCopiedString(key),
SliceFromCopiedString(value));
GRPC_LOG_IF_ERROR("MetadataBatch::AddMetadata",
grpc_metadata_batch_link_head(exec_ctx, batch_, storage));
return storage;
}
// ChannelData
void ChannelData::StartTransportOp(grpc_exec_ctx *exec_ctx,
grpc_channel_element *elem,
TransportOp *op) {
grpc_channel_next_op(exec_ctx, elem, op->op());
}
void ChannelData::GetInfo(grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
const grpc_channel_info *channel_info) {
grpc_channel_next_get_info(exec_ctx, elem, channel_info);
}
// CallData
void CallData::StartTransportStreamOp(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
TransportStreamOp *op) {
grpc_call_next_op(exec_ctx, elem, op->op());
}
void CallData::SetPollsetOrPollsetSet(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
grpc_polling_entity *pollent) {
grpc_call_stack_ignore_set_pollset_or_pollset_set(exec_ctx, elem, pollent);
}
char *CallData::GetPeer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
return grpc_call_next_get_peer(exec_ctx, elem);
}
// internal code used by RegisterChannelFilter()
namespace internal {
// Note: Implicitly initialized to nullptr due to static lifetime.
std::vector<FilterRecord> *channel_filters;
namespace {
bool MaybeAddFilter(grpc_exec_ctx *exec_ctx,
grpc_channel_stack_builder *builder, void *arg) {
const FilterRecord &filter = *(FilterRecord *)arg;
if (filter.include_filter) {
const grpc_channel_args *args =
grpc_channel_stack_builder_get_channel_arguments(builder);
if (!filter.include_filter(*args)) return true;
}
return grpc_channel_stack_builder_prepend_filter(builder, &filter.filter,
nullptr, nullptr);
}
} // namespace
void ChannelFilterPluginInit() {
for (size_t i = 0; i < channel_filters->size(); ++i) {
FilterRecord &filter = (*channel_filters)[i];
grpc_channel_init_register_stage(filter.stack_type, filter.priority,
MaybeAddFilter, (void *)&filter);
}
}
void ChannelFilterPluginShutdown() {}
} // namespace internal
} // namespace grpc
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