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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 "host/commands/assemble_cvd/alloc.h"
#include <iomanip>
#include <sstream>
#include "common/libs/fs/shared_fd.h"
#include "host/libs/allocd/request.h"
#include "host/libs/allocd/utils.h"
namespace cuttlefish {
static std::string StrForInstance(const std::string& prefix, int num) {
std::ostringstream stream;
stream << prefix << std::setfill('0') << std::setw(2) << num;
return stream.str();
}
IfaceConfig DefaultNetworkInterfaces(int num) {
IfaceConfig config{};
config.mobile_tap.name = StrForInstance("cvd-mtap-", num);
config.mobile_tap.resource_id = 0;
config.mobile_tap.session_id = 0;
config.wireless_tap.name = StrForInstance("cvd-wtap-", num);
config.wireless_tap.resource_id = 0;
config.wireless_tap.session_id = 0;
config.ethernet_tap.name = StrForInstance("cvd-etap-", num);
config.ethernet_tap.resource_id = 0;
config.ethernet_tap.session_id = 0;
return config;
}
std::optional<IfaceConfig> AllocateNetworkInterfaces() {
IfaceConfig config{};
SharedFD allocd_sock = SharedFD::SocketLocalClient(
kDefaultLocation, false, SOCK_STREAM);
CHECK(allocd_sock->IsOpen())
<< "Unable to connect to allocd on " << kDefaultLocation
<< ": " << allocd_sock->StrError();
Json::Value resource_config;
Json::Value request_list;
Json::Value req;
req["request_type"] = "create_interface";
req["uid"] = geteuid();
req["iface_type"] = "mtap";
request_list.append(req);
req["iface_type"] = "wtap";
request_list.append(req);
req["iface_type"] = "etap";
request_list.append(req);
resource_config["config_request"]["request_list"] = request_list;
CHECK(SendJsonMsg(allocd_sock, resource_config))
<< "Failed to send JSON to allocd";
auto resp_opt = RecvJsonMsg(allocd_sock);
CHECK(resp_opt.has_value()) << "Bad response from allocd";
auto resp = resp_opt.value();
CHECK(resp.isMember("config_status") && !resp["config_status"].isString())
<< "Bad response from allocd: " << resp;
CHECK_EQ(
resp["config_status"].asString(),
StatusToStr(RequestStatus::Success))
<<"Failed to allocate interfaces " << resp;
CHECK(resp.isMember("session_id") && resp["session_id"].isUInt())
<< "Bad response from allocd: " << resp;
auto session_id = resp["session_id"].asUInt();
CHECK(resp.isMember("response_list") && resp["response_list"].isArray())
<< "Bad response from allocd: " << resp;
Json::Value resp_list = resp["response_list"];
Json::Value mtap_resp;
Json::Value wtap_resp;
Json::Value etap_resp;
for (Json::Value::ArrayIndex i = 0; i != resp_list.size(); ++i) {
auto ty = StrToIfaceTy(resp_list[i]["iface_type"].asString());
switch (ty) {
case IfaceType::mtap: {
mtap_resp = resp_list[i];
break;
}
case IfaceType::wtap: {
wtap_resp = resp_list[i];
break;
}
case IfaceType::etap: {
etap_resp = resp_list[i];
break;
}
default: {
break;
}
}
}
if (!mtap_resp.isMember("iface_type")) {
LOG(ERROR) << "Missing mtap response from allocd";
return std::nullopt;
}
if (!wtap_resp.isMember("iface_type")) {
LOG(ERROR) << "Missing wtap response from allocd";
return std::nullopt;
}
if (!etap_resp.isMember("iface_type")) {
LOG(ERROR) << "Missing etap response from allocd";
return std::nullopt;
}
config.mobile_tap.name = mtap_resp["iface_name"].asString();
config.mobile_tap.resource_id = mtap_resp["resource_id"].asUInt();
config.mobile_tap.session_id = session_id;
config.wireless_tap.name = wtap_resp["iface_name"].asString();
config.wireless_tap.resource_id = wtap_resp["resource_id"].asUInt();
config.wireless_tap.session_id = session_id;
config.ethernet_tap.name = etap_resp["iface_name"].asString();
config.ethernet_tap.resource_id = etap_resp["resource_id"].asUInt();
config.ethernet_tap.session_id = session_id;
return config;
}
} // namespace cuttlefish
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