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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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.
*/
#include "utils.h"
#include <cstdint>
#include <optional>
#include "common/libs/fs/shared_buf.h"
#include "common/libs/fs/shared_fd.h"
#include "request.h"
namespace cuttlefish {
// While the JSON schema and payload structure are designed to be extensible,
// and avoid version incompatibility. However, should project requirements
// change, it is necessary that we have a mechanism to handle incompatibilities
// that arise over time. If an incompatibility should come about, the
// kMinHeaderVersion constant should be increased to match the new minimal set
// of features that are supported.
/// Current supported Header version number
constexpr uint16_t kCurHeaderVersion = 1;
/// Oldest compatible header version number
constexpr uint16_t kMinHeaderVersion = 1;
const std::map<RequestType, const char*> RequestTyToStrMap = {
{RequestType::ID, "alloc_id"},
{RequestType::CreateInterface, "create_interface"},
{RequestType::DestroyInterface, "destroy_interface"},
{RequestType::StopSession, "stop_session"},
{RequestType::Shutdown, "shutdown"},
{RequestType::Invalid, "invalid"}};
const std::map<std::string, RequestType> StrToRequestTyMap = {
{"alloc_id", RequestType::ID},
{"create_interface", RequestType::CreateInterface},
{"destroy_interface", RequestType::DestroyInterface},
{"stop_session", RequestType::StopSession},
{"shutdown", RequestType::Shutdown},
{"invalid", RequestType::Invalid}};
const std::map<std::string, IfaceType> StrToIfaceTyMap = {
{"invalid", IfaceType::Invalid}, {"mtap", IfaceType::mtap},
{"wtap", IfaceType::wtap}, {"wifiap", IfaceType::wifiap},
{"etap", IfaceType::etap}, {"wbr", IfaceType::wbr},
{"ebr", IfaceType::ebr}};
const std::map<IfaceType, std::string> IfaceTyToStrMap = {
{IfaceType::Invalid, "invalid"}, {IfaceType::mtap, "mtap"},
{IfaceType::wtap, "wtap"}, {IfaceType::wifiap, "wifiap"},
{IfaceType::etap, "etap"}, {IfaceType::wbr, "wbr"},
{IfaceType::ebr, "ebr"}};
const std::map<RequestStatus, std::string> ReqStatusToStrMap = {
{RequestStatus::Invalid, "invalid"},
{RequestStatus::Pending, "pending"},
{RequestStatus::Failure, "failure"},
{RequestStatus::Success, "success"}};
const std::map<std::string, RequestStatus> StrToReqStatusMap = {
{"invalid", RequestStatus::Invalid},
{"pending", RequestStatus::Pending},
{"failure", RequestStatus::Failure},
{"success", RequestStatus::Success}};
bool SendJsonMsg(SharedFD client_socket, const Json::Value& resp) {
LOG(INFO) << "Sending JSON message";
Json::StreamWriterBuilder factory;
auto resp_str = Json::writeString(factory, resp);
std::string header_buff(sizeof(RequestHeader), 0);
// fill in header
RequestHeader* header = reinterpret_cast<RequestHeader*>(header_buff.data());
header->len = resp_str.size();
header->version = kCurHeaderVersion;
auto payload = header_buff + resp_str;
return SendAll(client_socket, payload);
}
std::optional<Json::Value> RecvJsonMsg(SharedFD client_socket) {
LOG(INFO) << "Receiving JSON message";
RequestHeader header;
client_socket->Recv(&header, sizeof(header), kRecvFlags);
if (header.version < kMinHeaderVersion) {
LOG(WARNING) << "bad request header version: " << header.version;
return std::nullopt;
}
std::string payload = RecvAll(client_socket, header.len);
JsonRequestReader reader;
return reader.parse(payload);
}
std::string ReqTyToStr(RequestType req_ty) {
switch (req_ty) {
case RequestType::Invalid:
return "invalid";
case RequestType::Shutdown:
return "shutdown";
case RequestType::StopSession:
return "stop_session";
case RequestType::DestroyInterface:
return "destroy_interface";
case RequestType::CreateInterface:
return "create_interface";
case RequestType::ID:
return "id";
}
}
RequestType StrToReqTy(const std::string& req) {
auto it = StrToRequestTyMap.find(req);
if (it == StrToRequestTyMap.end()) {
return RequestType::Invalid;
} else {
return it->second;
}
}
RequestStatus StrToStatus(const std::string& st) {
auto it = StrToReqStatusMap.find(st);
if (it == StrToReqStatusMap.end()) {
return RequestStatus::Invalid;
} else {
return it->second;
}
}
std::string StatusToStr(RequestStatus st) {
switch (st) {
case RequestStatus::Invalid:
return "invalid";
case RequestStatus::Pending:
return "pending";
case RequestStatus::Success:
return "success";
case RequestStatus::Failure:
return "failure";
}
}
std::string IfaceTyToStr(IfaceType iface) {
switch (iface) {
case IfaceType::Invalid:
return "invalid";
case IfaceType::mtap:
return "mtap";
case IfaceType::wtap:
return "wtap";
case IfaceType::wifiap:
return "wifiap";
case IfaceType::etap:
return "etap";
case IfaceType::wbr:
return "wbr";
case IfaceType::ebr:
return "ebr";
}
}
IfaceType StrToIfaceTy(const std::string& iface) {
auto it = StrToIfaceTyMap.find(iface);
if (it == StrToIfaceTyMap.end()) {
return IfaceType::Invalid;
} else {
return it->second;
}
}
} // namespace cuttlefish
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