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/*
* Copyright (C) 2010 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.
*/
#pragma once
#include <string>
#include <netd_resolv/resolv.h> // android_net_context
#include <sysutils/FrameworkCommand.h>
#include <sysutils/FrameworkListener.h>
struct addrinfo;
struct hostent;
namespace android {
namespace net {
class NetworkDnsEventReported;
class DnsProxyListener : public FrameworkListener {
public:
DnsProxyListener();
virtual ~DnsProxyListener() {}
static constexpr const char* SOCKET_NAME = "dnsproxyd";
private:
class Handler {
public:
Handler(SocketClient* c) : mClient(c) { mClient->incRef(); }
virtual ~Handler() { mClient->decRef(); }
void operator=(const Handler&) = delete;
// Attept to spawn the worker thread, or return an error to the client.
// The Handler instance will self-delete in either case.
void spawn();
virtual void run() = 0;
virtual std::string threadName() = 0;
SocketClient* mClient; // ref-counted
};
/* ------ getaddrinfo ------*/
class GetAddrInfoCmd : public FrameworkCommand {
public:
GetAddrInfoCmd();
virtual ~GetAddrInfoCmd() {}
int runCommand(SocketClient* c, int argc, char** argv) override;
};
class GetAddrInfoHandler : public Handler {
public:
// Note: All of host, service, and hints may be NULL
GetAddrInfoHandler(SocketClient* c, std::string host, std::string service,
std::unique_ptr<addrinfo> hints, const android_net_context& netcontext);
~GetAddrInfoHandler() override = default;
void run() override;
std::string threadName() override;
private:
void doDns64Synthesis(int32_t* rv, addrinfo** res, NetworkDnsEventReported* event);
std::string mHost;
std::string mService;
std::unique_ptr<addrinfo> mHints;
android_net_context mNetContext;
};
/* ------ gethostbyname ------*/
class GetHostByNameCmd : public FrameworkCommand {
public:
GetHostByNameCmd();
virtual ~GetHostByNameCmd() {}
int runCommand(SocketClient* c, int argc, char** argv) override;
};
class GetHostByNameHandler : public Handler {
public:
GetHostByNameHandler(SocketClient* c, std::string name, int af,
const android_net_context& netcontext);
~GetHostByNameHandler() override = default;
void run() override;
std::string threadName() override;
private:
void doDns64Synthesis(int32_t* rv, hostent* hbuf, char* buf, size_t buflen, hostent** hpp,
NetworkDnsEventReported* event);
std::string mName;
int mAf;
android_net_context mNetContext;
};
/* ------ gethostbyaddr ------*/
class GetHostByAddrCmd : public FrameworkCommand {
public:
GetHostByAddrCmd();
virtual ~GetHostByAddrCmd() {}
int runCommand(SocketClient* c, int argc, char** argv) override;
};
class GetHostByAddrHandler : public Handler {
public:
GetHostByAddrHandler(SocketClient* c, in6_addr address, int addressLen, int addressFamily,
const android_net_context& netcontext);
~GetHostByAddrHandler() override = default;
void run() override;
std::string threadName() override;
private:
void doDns64ReverseLookup(hostent* hbuf, char* buf, size_t buflen, hostent** hpp,
NetworkDnsEventReported* event);
in6_addr mAddress;
int mAddressLen; // length of address to look up
int mAddressFamily; // address family
android_net_context mNetContext;
};
/* ------ resnsend ------*/
class ResNSendCommand : public FrameworkCommand {
public:
ResNSendCommand();
virtual ~ResNSendCommand() {}
int runCommand(SocketClient* c, int argc, char** argv) override;
};
class ResNSendHandler : public Handler {
public:
ResNSendHandler(SocketClient* c, std::string msg, uint32_t flags,
const android_net_context& netcontext);
~ResNSendHandler() override = default;
void run() override;
std::string threadName() override;
private:
std::string mMsg;
uint32_t mFlags;
android_net_context mNetContext;
};
/* ------ getdnsnetid ------*/
class GetDnsNetIdCommand : public FrameworkCommand {
public:
GetDnsNetIdCommand();
virtual ~GetDnsNetIdCommand() {}
int runCommand(SocketClient* c, int argc, char** argv) override;
};
std::unique_ptr<GetAddrInfoCmd> mGetAddrInfoCmd;
std::unique_ptr<GetHostByAddrCmd> mGetHostByAddrCmd;
std::unique_ptr<GetHostByNameCmd> mGetHostByNameCmd;
std::unique_ptr<ResNSendCommand> mResNSendCommand;
std::unique_ptr<GetDnsNetIdCommand> mGetDnsNetIdCommand;
};
} // namespace net
} // namespace android
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