mirror of https://github.com/istio/proxy.git
143 lines
4.5 KiB
C++
143 lines
4.5 KiB
C++
/* Copyright 2019 Istio Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <set>
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#include "absl/strings/string_view.h"
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#include "extensions/common/node_info.pb.h"
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#include "google/protobuf/struct.pb.h"
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namespace Wasm {
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namespace Common {
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using StringView = absl::string_view;
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// Node metadata
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constexpr StringView WholeNodeKey = ".";
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constexpr StringView kUpstreamMetadataIdKey =
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"envoy.wasm.metadata_exchange.upstream_id";
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constexpr StringView kUpstreamMetadataKey =
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"envoy.wasm.metadata_exchange.upstream";
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constexpr StringView kDownstreamMetadataIdKey =
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"envoy.wasm.metadata_exchange.downstream_id";
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constexpr StringView kDownstreamMetadataKey =
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"envoy.wasm.metadata_exchange.downstream";
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// Header keys
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constexpr StringView kAuthorityHeaderKey = ":authority";
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constexpr StringView kMethodHeaderKey = ":method";
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constexpr StringView kContentTypeHeaderKey = "content-type";
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const std::string kProtocolHTTP = "http";
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const std::string kProtocolGRPC = "grpc";
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const std::set<std::string> kGrpcContentTypes{
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"application/grpc", "application/grpc+proto", "application/grpc+json"};
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// RequestInfo represents the information collected from filter stream
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// callbacks. This is used to fill metrics and logs.
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struct RequestInfo {
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// Start timestamp in nanoseconds.
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int64_t start_timestamp = 0;
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// End timestamp in nanoseconds.
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int64_t end_timestamp = 0;
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// Request total size in bytes, include header, body, and trailer.
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int64_t request_size = 0;
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// Response total size in bytes, include header, body, and trailer.
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int64_t response_size = 0;
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// Destination port that the request targets.
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uint32_t destination_port = 0;
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// Protocol used the request (HTTP/1.1, gRPC, etc).
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std::string request_protocol;
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// Response code of the request.
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uint32_t response_code = 0;
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// Response flag giving additional information - NR, UAEX etc.
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// TODO populate
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std::string response_flag;
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// Host name of destination service.
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std::string destination_service_host;
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// Short name of destination service.
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std::string destination_service_name;
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// Operation of the request, i.e. HTTP method or gRPC API method.
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std::string request_operation;
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// Indicates if the request uses mTLS.
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bool mTLS = false;
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// Principal of source and destination workload extracted from TLS
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// certificate.
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std::string source_principal;
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std::string destination_principal;
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// Rbac filter policy id and result.
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std::string rbac_permissive_policy_id;
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std::string rbac_permissive_engine_result;
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};
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// RequestContext contains all the information available in the request.
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// Some or all part may be populated depending on need.
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struct RequestContext {
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const bool outbound;
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const wasm::common::NodeInfo& source;
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const wasm::common::NodeInfo& destination;
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const Common::RequestInfo& request;
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};
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// TrafficDirection is a mirror of envoy xDS traffic direction.
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enum class TrafficDirection : int64_t {
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Unspecified = 0,
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Inbound = 1,
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Outbound = 2,
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};
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// Extracts NodeInfo from proxy node metadata passed in as a protobuf struct.
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// It converts the metadata struct to a JSON struct and parse NodeInfo proto
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// from that JSON struct.
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// Returns status of protocol/JSON operations.
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google::protobuf::util::Status extractNodeMetadata(
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const google::protobuf::Struct& metadata,
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wasm::common::NodeInfo* node_info);
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// Read from local node metadata and populate node_info.
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google::protobuf::util::Status extractLocalNodeMetadata(
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wasm::common::NodeInfo* node_info);
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// populateHTTPRequestInfo populates the RequestInfo struct. It needs access to
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// the request context.
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void populateHTTPRequestInfo(bool outbound, RequestInfo* request_info);
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// Extracts node metadata value. It looks for values of all the keys
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// corresponding to EXCHANGE_KEYS in node_metadata and populates it in
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// google::protobuf::Value pointer that is passed in.
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google::protobuf::util::Status extractNodeMetadataValue(
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const google::protobuf::Struct& node_metadata,
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google::protobuf::Struct* metadata);
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} // namespace Common
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} // namespace Wasm
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