/usr/include/Poco/Net/Net.h is in libpoco-dev 1.8.0.1-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Net.h
//
// Library: Net
// Package: NetCore
// Module: Net
//
// Basic definitions for the Poco Net library.
// This file must be the first file included by every other Net
// header file.
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Net_Net_INCLUDED
#define Net_Net_INCLUDED
#include "Poco/Foundation.h"
//
// The following block is the standard way of creating macros which make exporting
// from a DLL simpler. All files within this DLL are compiled with the Net_EXPORTS
// symbol defined on the command line. this symbol should not be defined on any project
// that uses this DLL. This way any other project whose source files include this file see
// Net_API functions as being imported from a DLL, wheras this DLL sees symbols
// defined with this macro as being exported.
//
#if defined(_WIN32) && defined(POCO_DLL)
#if defined(Net_EXPORTS)
#define Net_API __declspec(dllexport)
#else
#define Net_API __declspec(dllimport)
#endif
#endif
#if !defined(Net_API)
#if !defined(POCO_NO_GCC_API_ATTRIBUTE) && defined (__GNUC__) && (__GNUC__ >= 4)
#define Net_API __attribute__ ((visibility ("default")))
#else
#define Net_API
#endif
#endif
//
// Automatically link Net library.
//
#if defined(_MSC_VER)
#if !defined(POCO_NO_AUTOMATIC_LIBS) && !defined(Net_EXPORTS)
#pragma comment(lib, "PocoNet" POCO_LIB_SUFFIX)
#endif
#endif
// Default to enabled IPv6 support if not explicitly disabled
#if !defined(POCO_NET_NO_IPv6) && !defined (POCO_HAVE_IPv6)
#define POCO_HAVE_IPv6
#elif defined(POCO_NET_NO_IPv6) && defined (POCO_HAVE_IPv6)
#undef POCO_HAVE_IPv6
#endif // POCO_NET_NO_IPv6, POCO_HAVE_IPv6
namespace Poco {
namespace Net {
void Net_API initializeNetwork();
/// Initialize the network subsystem.
/// (Windows only, no-op elsewhere)
void Net_API uninitializeNetwork();
/// Uninitialize the network subsystem.
/// (Windows only, no-op elsewhere)
}} // namespace Poco::Net
//
// Automate network initialization (only relevant on Windows).
//
#if defined(POCO_OS_FAMILY_WINDOWS) && !defined(POCO_NO_AUTOMATIC_LIB_INIT) && !defined(__GNUC__)
extern "C" const struct Net_API NetworkInitializer pocoNetworkInitializer;
#if defined(Net_EXPORTS)
#if defined(_WIN64) || defined(_WIN32_WCE)
#define POCO_NET_FORCE_SYMBOL(s) __pragma(comment (linker, "/export:"#s))
#elif defined(_WIN32)
#define POCO_NET_FORCE_SYMBOL(s) __pragma(comment (linker, "/export:_"#s))
#endif
#else // !Net_EXPORTS
#if defined(_WIN64) || defined(_WIN32_WCE)
#define POCO_NET_FORCE_SYMBOL(s) __pragma(comment (linker, "/include:"#s))
#elif defined(_WIN32)
#define POCO_NET_FORCE_SYMBOL(s) __pragma(comment (linker, "/include:_"#s))
#endif
#endif // Net_EXPORTS
POCO_NET_FORCE_SYMBOL(pocoNetworkInitializer)
#endif // POCO_OS_FAMILY_WINDOWS
//
// Define POCO_NET_HAS_INTERFACE for platforms that have network interface detection implemented.
//
#if defined(POCO_OS_FAMILY_WINDOWS) || (POCO_OS == POCO_OS_LINUX) || defined(POCO_OS_FAMILY_BSD) || (POCO_OS == POCO_OS_SOLARIS) || (POCO_OS == POCO_OS_QNX)
#define POCO_NET_HAS_INTERFACE
#endif
#endif // Net_Net_INCLUDED
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