ICE 网络库尝试

关注

原创最新推荐文章于 2026-09-29 14:50:05 发布 4.6k 阅读 AI 写同款· GEO 优化 ›

libdatachannel：轻量高效的C++ WebRTC P2P通信库快速上手指南 WebRTC（Web实时通信）是一套支持浏览器与原生应用之间进行点对点（P2P）音视频和数据传输的开放标准协议栈。其核心原理在于通过ICE（交互式连接建立）框架实现NAT穿透，并利用DTLS（数据报传输层安全）和SCTP（流控制传输协议）分别保障通信安全与数据传输的可靠性。这项技术的核心价值在于能够建立低延迟、高隐私性的直接连接，无需依赖中心服务器中转数据，从而显著降低服务端带宽成本并提升用户体验。其典型应用场景包括远程桌面控制、在线协作工具、物联网（IoT）设备指令下发以及实时游戏状态同步等。本文聚焦于l 阅读详情

1.编写 ice 对象定义文件Printer.ice：

// **********************************************************************

// This copy of Ice is licensed to you under the terms described in the

// ICE_LICENSE file included in this distribution.

// **********************************************************************

#ifndef SIMPLE_ICE

#define SIMPLE_ICE

module Demo

{

interface Printer

{

void printString(string s);

};

#endif

2. 生成c++ 代理类：

在命令行输入 slice2cpp Printer.ice

生成：

// **********************************************************************

// This copy of Ice is licensed to you under the terms described in the

// ICE_LICENSE file included in this distribution.

// **********************************************************************

// Ice version 3.4.1

// <auto-generated>

// Generated from file `printer.ice'

// Warning: do not edit this file.

// </auto-generated>

#ifndef __printer_h__

#define __printer_h__

#include <Ice/LocalObjectF.h>

#include <Ice/ProxyF.h>

#include <Ice/ObjectF.h>

#include <Ice/Exception.h>

#include <Ice/LocalObject.h>

#include <Ice/Proxy.h>

#include <Ice/Object.h>

#include <Ice/Outgoing.h>

#include <Ice/OutgoingAsync.h>

#include <Ice/Incoming.h>

#include <Ice/Direct.h>

#include <IceUtil/ScopedArray.h>

#include <Ice/StreamF.h>

#include <Ice/UndefSysMacros.h>

#ifndef ICE_IGNORE_VERSION

# if ICE_INT_VERSION / 100 != 304

# error Ice version mismatch!

# endif

# if ICE_INT_VERSION % 100 > 50

# error Beta header file detected

# endif

# if ICE_INT_VERSION % 100 < 1

# error Ice patch level mismatch!

# endif

#endif

namespace IceProxy

{

namespace Demo

{

class Printer;

}

namespace Demo

{

class Printer;

bool operator==(const Printer&, const Printer&);

bool operator<(const Printer&, const Printer&);

}

namespace IceInternal

{

::Ice::Object* upCast(::Demo::Printer*);

::IceProxy::Ice::Object* upCast(::IceProxy::Demo::Printer*);

}

namespace Demo

{

typedef ::IceInternal::Handle< ::Demo::Printer> PrinterPtr;

typedef ::IceInternal::ProxyHandle< ::IceProxy::Demo::Printer> PrinterPrx;

void __read(::IceInternal::BasicStream*, PrinterPrx&);

void __patch__PrinterPtr(void*, ::Ice::ObjectPtr&);

}

namespace Demo

{

class Callback_Printer_printString_Base : virtual public ::IceInternal::CallbackBase { };

typedef ::IceUtil::Handle< Callback_Printer_printString_Base> Callback_Printer_printStringPtr;

}

namespace IceProxy

{

namespace Demo

{

class Printer : virtual public ::IceProxy::Ice::Object

{

public:

void printString(const ::std::string& s)

{

printString(s, 0);

}

void printString(const ::std::string& s, const ::Ice::Context& __ctx)

{

printString(s, &__ctx);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s)

{

return begin_printString(s, 0, ::IceInternal::__dummyCallback, 0);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s, const ::Ice::Context& __ctx)

{

return begin_printString(s, &__ctx, ::IceInternal::__dummyCallback, 0);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s, const ::Ice::CallbackPtr& __del, const ::Ice::LocalObjectPtr& __cookie = 0)

{

return begin_printString(s, 0, __del, __cookie);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s, const ::Ice::Context& __ctx, const ::Ice::CallbackPtr& __del, const ::Ice::LocalObjectPtr& __cookie = 0)

{

return begin_printString(s, &__ctx, __del, __cookie);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s, const ::Demo::Callback_Printer_printStringPtr& __del, const ::Ice::LocalObjectPtr& __cookie = 0)

{

return begin_printString(s, 0, __del, __cookie);

}

::Ice::AsyncResultPtr begin_printString(const ::std::string& s, const ::Ice::Context& __ctx, const ::Demo::Callback_Printer_printStringPtr& __del, const ::Ice::LocalObjectPtr& __cookie = 0)

{

return begin_printString(s, &__ctx, __del, __cookie);

}

void end_printString(const ::Ice::AsyncResultPtr&);

private:

void printString(const ::std::string&, const ::Ice::Context*);

::Ice::AsyncResultPtr begin_printString(const ::std::string&, const ::Ice::Context*, const ::IceInternal::CallbackBasePtr&, const ::Ice::LocalObjectPtr& __cookie = 0);

public:

::IceInternal::ProxyHandle<Printer> ice_context(const ::Ice::Context& __context) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_context(__context).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_context(__context).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_adapterId(const std::string& __id) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_adapterId(__id).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_adapterId(__id).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_endpoints(const ::Ice::EndpointSeq& __endpoints) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_endpoints(__endpoints).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_endpoints(__endpoints).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_locatorCacheTimeout(int __timeout) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_locatorCacheTimeout(__timeout).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_locatorCacheTimeout(__timeout).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_connectionCached(bool __cached) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_connectionCached(__cached).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_connectionCached(__cached).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_endpointSelection(::Ice::EndpointSelectionType __est) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_endpointSelection(__est).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_endpointSelection(__est).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_secure(bool __secure) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_secure(__secure).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_secure(__secure).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_preferSecure(bool __preferSecure) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_preferSecure(__preferSecure).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_preferSecure(__preferSecure).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_router(const ::Ice::RouterPrx& __router) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_router(__router).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_router(__router).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_locator(const ::Ice::LocatorPrx& __locator) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_locator(__locator).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_locator(__locator).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_collocationOptimized(bool __co) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_collocationOptimized(__co).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_collocationOptimized(__co).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_twoway() const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_twoway().get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_twoway().get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_oneway() const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_oneway().get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_oneway().get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_batchOneway() const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_batchOneway().get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_batchOneway().get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_datagram() const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_datagram().get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_datagram().get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_batchDatagram() const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_batchDatagram().get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_batchDatagram().get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_compress(bool __compress) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_compress(__compress).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_compress(__compress).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_timeout(int __timeout) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_timeout(__timeout).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_timeout(__timeout).get());

#endif

}

::IceInternal::ProxyHandle<Printer> ice_connectionId(const std::string& __id) const

{

#if defined(_MSC_VER) && (_MSC_VER < 1300) // VC++ 6 compiler bug

typedef ::IceProxy::Ice::Object _Base;

return dynamic_cast<Printer*>(_Base::ice_connectionId(__id).get());

#else

return dynamic_cast<Printer*>(::IceProxy::Ice::Object::ice_connectionId(__id).get());

#endif

}

static const ::std::string& ice_staticId();

private:

virtual ::IceInternal::Handle< ::IceDelegateM::Ice::Object> __createDelegateM();

virtual ::IceInternal::Handle< ::IceDelegateD::Ice::Object> __createDelegateD();

virtual ::IceProxy::Ice::Object* __newInstance() const;

};

}

namespace IceDelegate

{

namespace Demo

{

class Printer : virtual public ::IceDelegate::Ice::Object

{

public:

virtual void printString(const ::std::string&, const ::Ice::Context*) = 0;

};

}

namespace IceDelegateM

{

namespace Demo

{

class Printer : virtual public ::IceDelegate::Demo::Printer,

virtual public ::IceDelegateM::Ice::Object

{

public:

virtual void printString(const ::std::string&, const ::Ice::Context*);

};

}

namespace IceDelegateD

{

namespace Demo

{

class Printer : virtual public ::IceDelegate::Demo::Printer,

virtual public ::IceDelegateD::Ice::Object

{

public:

virtual void printString(const ::std::string&, const ::Ice::Context*);

};

}

namespace Demo

{

class Printer : virtual public ::Ice::Object

{

public:

typedef PrinterPrx ProxyType;

typedef PrinterPtr PointerType;

virtual ::Ice::ObjectPtr ice_clone() const;

virtual bool ice_isA(const ::std::string&, const ::Ice::Current& = ::Ice::Current()) const;

virtual ::std::vector< ::std::string> ice_ids(const ::Ice::Current& = ::Ice::Current()) const;

virtual const ::std::string& ice_id(const ::Ice::Current& = ::Ice::Current()) const;

static const ::std::string& ice_staticId();

virtual void printString(const ::std::string&, const ::Ice::Current& = ::Ice::Current()) = 0;

::Ice::DispatchStatus ___printString(::IceInternal::Incoming&, const ::Ice::Current&);

virtual ::Ice::DispatchStatus __dispatch(::IceInternal::Incoming&, const ::Ice::Current&);

virtual void __write(::IceInternal::BasicStream*) const;

virtual void __read(::IceInternal::BasicStream*, bool);

// COMPILERFIX: Stream API is not supported with VC++ 6

#if !defined(_MSC_VER) || (_MSC_VER >= 1300)

virtual void __write(const ::Ice::OutputStreamPtr&) const;

virtual void __read(const ::Ice::InputStreamPtr&, bool);

#endif

};

inline bool operator==(const Printer& l, const Printer& r)

{

return static_cast<const ::Ice::Object&>(l) == static_cast<const ::Ice::Object&>(r);

}

inline bool operator<(const Printer& l, const Printer& r)

{

return static_cast<const ::Ice::Object&>(l) < static_cast<const ::Ice::Object&>(r);

}

namespace Demo

{

template<class T>

class CallbackNC_Printer_printString : public Callback_Printer_printString_Base, public ::IceInternal::OnewayCallbackNC<T>

{

public:

typedef IceUtil::Handle<T> TPtr;

typedef void (T::*Exception)(const ::Ice::Exception&);

typedef void (T::*Sent)(bool);

typedef void (T::*Response)();

CallbackNC_Printer_printString(const TPtr& obj, Response cb, Exception excb, Sent sentcb)

: ::IceInternal::OnewayCallbackNC<T>(obj, cb, excb, sentcb)

{

}

};

template<class T> Callback_Printer_printStringPtr

newCallback_Printer_printString(const IceUtil::Handle<T>& instance, void (T::*cb)(), void (T::*excb)(const ::Ice::Exception&), void (T::*sentcb)(bool) = 0)

{

return new CallbackNC_Printer_printString<T>(instance, cb, excb, sentcb);

}

template<class T> Callback_Printer_printStringPtr

newCallback_Printer_printString(const IceUtil::Handle<T>& instance, void (T::*excb)(const ::Ice::Exception&), void (T::*sentcb)(bool) = 0)

{

return new CallbackNC_Printer_printString<T>(instance, 0, excb, sentcb);

}

template<class T> Callback_Printer_printStringPtr

newCallback_Printer_printString(T* instance, void (T::*cb)(), void (T::*excb)(const ::Ice::Exception&), void (T::*sentcb)(bool) = 0)

{

return new CallbackNC_Printer_printString<T>(instance, cb, excb, sentcb);

}

template<class T> Callback_Printer_printStringPtr

newCallback_Printer_printString(T* instance, void (T::*excb)(const ::Ice::Exception&), void (T::*sentcb)(bool) = 0)

{

return new CallbackNC_Printer_printString<T>(instance, 0, excb, sentcb);

}

template<class T, typename CT>

class Callback_Printer_printString : public Callback_Printer_printString_Base, public ::IceInternal::OnewayCallback<T, CT>

{

public:

typedef IceUtil::Handle<T> TPtr;

typedef void (T::*Exception)(const ::Ice::Exception& , const CT&);

typedef void (T::*Sent)(bool , const CT&);

typedef void (T::*Response)(const CT&);

Callback_Printer_printString(const TPtr& obj, Response cb, Exception excb, Sent sentcb)

: ::IceInternal::OnewayCallback<T, CT>(obj, cb, excb, sentcb)

{

}

};

template<class T, typename CT> Callback_Printer_printStringPtr

newCallback_Printer_printString(const IceUtil::Handle<T>& instance, void (T::*cb)(const CT&), void (T::*excb)(const ::Ice::Exception&, const CT&), void (T::*sentcb)(bool, const CT&) = 0)

{

return new Callback_Printer_printString<T, CT>(instance, cb, excb, sentcb);

}

template<class T, typename CT> Callback_Printer_printStringPtr

newCallback_Printer_printString(const IceUtil::Handle<T>& instance, void (T::*excb)(const ::Ice::Exception&, const CT&), void (T::*sentcb)(bool, const CT&) = 0)

{

return new Callback_Printer_printString<T, CT>(instance, 0, excb, sentcb);

}

template<class T, typename CT> Callback_Printer_printStringPtr

newCallback_Printer_printString(T* instance, void (T::*cb)(const CT&), void (T::*excb)(const ::Ice::Exception&, const CT&), void (T::*sentcb)(bool, const CT&) = 0)

{

return new Callback_Printer_printString<T, CT>(instance, cb, excb, sentcb);

}

template<class T, typename CT> Callback_Printer_printStringPtr

newCallback_Printer_printString(T* instance, void (T::*excb)(const ::Ice::Exception&, const CT&), void (T::*sentcb)(bool, const CT&) = 0)

{

return new Callback_Printer_printString<T, CT>(instance, 0, excb, sentcb);

}

#endif

3. 编写服务端代码：

///////////////////////////

// **********************************************************************

// This copy of Ice is licensed to you under the terms described in the

// ICE_LICENSE file included in this distribution.

// **********************************************************************

#include <Ice/Ice.h>

#include <Printer.h>

using namespace std;

using namespace Demo;

class PrinterI : public Printer

{

public:

virtual void printString(const string &, const Ice::Current&);

};

void

PrinterI::

printString(const string &s, const Ice::Current&)

{

cout << s << endl;

}

int

main(int argc, char* argv[])

{

int status = 0;

int dummy;

dummy = 0;

Ice::CommunicatorPtr ic;

try

{

Ice::PropertiesPtr props = Ice::createProperties();

props->setProperty("Ice.ThreadPool.Server.Size" , "10"); //设置线程池数

props->setProperty("Ice.ThreadPool.Server.SizeMax" , "20"); //设置最大线程池数

Ice::InitializationData ini_data;

ini_data.properties = props;

//ic = Ice::initialize(argc, argv);

//ic = Ice::initialize( dummy , 0 , props);

ic = Ice::initialize(ini_data);

Ice::ObjectAdapterPtr adapter =

ic->createObjectAdapterWithEndpoints("SimplePrinterAdapter", "tcp -p 10000");

Ice::ObjectPtr object = new PrinterI;

adapter->add(object, ic->stringToIdentity("SimplePrinter"));

adapter->activate();

ic->waitForShutdown();

}

catch(const Ice::Exception& e)

{

cerr << e << endl;

status = 1;

}

catch(const char* msg)

{

cerr << msg << endl;

status = 1;

}

if(ic)

{

try

{

ic->destroy();

}

catch(const Ice::Exception& e)

{

cerr << e << endl;

status = 1;

}

return status;

}

4.编写客户端代码：

// **********************************************************************

// This copy of Ice is licensed to you under the terms described in the

// ICE_LICENSE file included in this distribution.

// **********************************************************************

#include <Ice/Ice.h>

#include <Printer.h>

using namespace std;

using namespace Demo;

int

main(int argc, char * argv[])

{

int status = 0;

Ice::CommunicatorPtr ic;

try

{

Ice::PropertiesPtr props = Ice::createProperties();

props->setProperty("Ice.Default.Host", "127.0.0.1"); //设置线程池数

Ice::InitializationData ini_data;

ini_data.properties = props;

//ic = Ice::initialize(argc, argv);

ic = Ice::initialize(ini_data);

Ice::ObjectPrx base = ic->stringToProxy("SimplePrinter:tcp -p 10000");

PrinterPrx printer = PrinterPrx::checkedCast(base);

if(!printer)

{

throw "Invalid proxy";

}

printer->printString("Hello World! by ken 2010");

}

catch(const Ice::Exception& ex)

{

cerr << ex << endl;

status = 1;

}

catch(const char* msg)

{

cerr << msg << endl;

status = 1;

}

if(ic)

{

try

{

ic->destroy();

}

catch (const Ice::Exception& ex)

{

cerr << ex << endl;

status = 1;

}

return status;

}

运行结果：

Hello World! by ken 2010

标签

#网络 #object #compiler #exception #callback

libdatachannel：轻量跨平台WebRTC数据通道实现与应用实战 WebRTC（Web实时通信）是一套支持浏览器与移动端进行点对点音视频和数据传输的开放标准协议栈，其核心价值在于无需插件即可实现低延迟、安全的实时通信。其技术原理基于ICE、STUN/TURN、DTLS-SRTP和SCTP等协议，通过NAT穿透建立直接连接，并保障传输安全。在工程实践中，原生WebRTC库（libwebrtc）常因庞大的体积、复杂的编译依赖和平台绑定问题，在嵌入式设备、IoT终端和原生桌面应用等非浏览器环境中集成困难。libdatachannel作为一款用现代C++17重写的轻量级、模块化W 阅读详情

ICE 网络库尝试

相关推荐