mirror of
https://github.com/pocoproject/poco.git
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423 lines
9.2 KiB
C++
423 lines
9.2 KiB
C++
//
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// SocketAddress.cpp
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//
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// $Id: //poco/1.4/Net/src/SocketAddress.cpp#5 $
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//
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// Library: Net
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// Package: NetCore
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// Module: SocketAddress
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//
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// Copyright (c) 2005-2011, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/Net/SocketAddress.h"
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#include "Poco/Net/IPAddress.h"
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#include "Poco/Net/NetException.h"
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#include "Poco/Net/DNS.h"
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#include "Poco/RefCountedObject.h"
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#include "Poco/NumberParser.h"
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#include "Poco/NumberFormatter.h"
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#include <algorithm>
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#include <cstring>
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using Poco::RefCountedObject;
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using Poco::NumberParser;
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using Poco::NumberFormatter;
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using Poco::UInt16;
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using Poco::InvalidArgumentException;
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namespace Poco {
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namespace Net {
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struct AFLT
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{
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bool operator () (const IPAddress& a1, const IPAddress& a2)
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{
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return a1.af() < a2.af();
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}
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};
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//
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// SocketAddressImpl
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//
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class SocketAddressImpl: public RefCountedObject
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{
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public:
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virtual IPAddress host() const = 0;
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virtual UInt16 port() const = 0;
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virtual poco_socklen_t length() const = 0;
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virtual const struct sockaddr* addr() const = 0;
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virtual int af() const = 0;
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protected:
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SocketAddressImpl()
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{
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#if defined(_WIN32)
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Poco::Net::initializeNetwork();
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#endif
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}
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virtual ~SocketAddressImpl()
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{
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#if defined(_WIN32)
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Poco::Net::uninitializeNetwork();
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#endif
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}
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private:
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SocketAddressImpl(const SocketAddressImpl&);
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SocketAddressImpl& operator = (const SocketAddressImpl&);
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};
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class IPv4SocketAddressImpl: public SocketAddressImpl
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{
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public:
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IPv4SocketAddressImpl()
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{
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std::memset(&_addr, 0, sizeof(_addr));
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_addr.sin_family = AF_INET;
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poco_set_sin_len(&_addr);
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}
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IPv4SocketAddressImpl(const struct sockaddr_in* addr)
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{
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std::memcpy(&_addr, addr, sizeof(_addr));
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}
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IPv4SocketAddressImpl(const void* addr, UInt16 port)
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{
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std::memset(&_addr, 0, sizeof(_addr));
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_addr.sin_family = AF_INET;
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std::memcpy(&_addr.sin_addr, addr, sizeof(_addr.sin_addr));
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_addr.sin_port = port;
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}
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IPAddress host() const
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{
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return IPAddress(&_addr.sin_addr, sizeof(_addr.sin_addr));
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}
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UInt16 port() const
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{
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return _addr.sin_port;
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}
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poco_socklen_t length() const
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{
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return sizeof(_addr);
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}
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const struct sockaddr* addr() const
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{
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return reinterpret_cast<const struct sockaddr*>(&_addr);
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}
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int af() const
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{
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return _addr.sin_family;
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}
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private:
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struct sockaddr_in _addr;
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};
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#if defined(POCO_HAVE_IPv6)
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class IPv6SocketAddressImpl: public SocketAddressImpl
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{
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public:
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IPv6SocketAddressImpl(const struct sockaddr_in6* addr)
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{
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std::memcpy(&_addr, addr, sizeof(_addr));
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}
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IPv6SocketAddressImpl(const void* addr, UInt16 port)
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{
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std::memset(&_addr, 0, sizeof(_addr));
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_addr.sin6_family = AF_INET6;
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poco_set_sin6_len(&_addr);
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std::memcpy(&_addr.sin6_addr, addr, sizeof(_addr.sin6_addr));
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_addr.sin6_port = port;
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}
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IPv6SocketAddressImpl(const void* addr, UInt16 port, UInt32 scope)
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{
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std::memset(&_addr, 0, sizeof(_addr));
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_addr.sin6_family = AF_INET6;
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poco_set_sin6_len(&_addr);
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std::memcpy(&_addr.sin6_addr, addr, sizeof(_addr.sin6_addr));
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_addr.sin6_port = port;
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_addr.sin6_scope_id = scope;
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}
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IPAddress host() const
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{
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return IPAddress(&_addr.sin6_addr, sizeof(_addr.sin6_addr), _addr.sin6_scope_id);
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}
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UInt16 port() const
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{
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return _addr.sin6_port;
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}
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poco_socklen_t length() const
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{
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return sizeof(_addr);
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}
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const struct sockaddr* addr() const
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{
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return reinterpret_cast<const struct sockaddr*>(&_addr);
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}
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int af() const
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{
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return _addr.sin6_family;
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}
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private:
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struct sockaddr_in6 _addr;
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};
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#endif // POCO_HAVE_IPv6
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//
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// SocketAddress
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//
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SocketAddress::SocketAddress()
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{
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_pImpl = new IPv4SocketAddressImpl;
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}
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SocketAddress::SocketAddress(const IPAddress& addr, Poco::UInt16 port)
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{
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init(addr, port);
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}
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SocketAddress::SocketAddress(const std::string& addr, Poco::UInt16 port)
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{
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init(addr, port);
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}
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SocketAddress::SocketAddress(const std::string& addr, const std::string& port)
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{
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init(addr, resolveService(port));
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}
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SocketAddress::SocketAddress(const std::string& hostAndPort)
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{
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poco_assert (!hostAndPort.empty());
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std::string host;
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std::string port;
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std::string::const_iterator it = hostAndPort.begin();
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std::string::const_iterator end = hostAndPort.end();
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if (*it == '[')
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{
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++it;
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while (it != end && *it != ']') host += *it++;
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if (it == end) throw InvalidArgumentException("Malformed IPv6 address");
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++it;
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}
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else
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{
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while (it != end && *it != ':') host += *it++;
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}
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if (it != end && *it == ':')
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{
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++it;
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while (it != end) port += *it++;
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}
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else throw InvalidArgumentException("Missing port number");
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init(host, resolveService(port));
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}
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SocketAddress::SocketAddress(const SocketAddress& addr)
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{
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_pImpl = addr._pImpl;
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_pImpl->duplicate();
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}
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SocketAddress::SocketAddress(const struct sockaddr* addr, poco_socklen_t length)
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{
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if (length == sizeof(struct sockaddr_in))
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_pImpl = new IPv4SocketAddressImpl(reinterpret_cast<const struct sockaddr_in*>(addr));
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#if defined(POCO_HAVE_IPv6)
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else if (length == sizeof(struct sockaddr_in6))
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_pImpl = new IPv6SocketAddressImpl(reinterpret_cast<const struct sockaddr_in6*>(addr));
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#endif
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else throw Poco::InvalidArgumentException("Invalid address length passed to SocketAddress()");
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}
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SocketAddress::~SocketAddress()
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{
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_pImpl->release();
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}
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SocketAddress& SocketAddress::operator = (const SocketAddress& addr)
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{
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if (&addr != this)
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{
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_pImpl->release();
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_pImpl = addr._pImpl;
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_pImpl->duplicate();
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}
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return *this;
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}
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void SocketAddress::swap(SocketAddress& addr)
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{
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std::swap(_pImpl, addr._pImpl);
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}
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IPAddress SocketAddress::host() const
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{
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return _pImpl->host();
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}
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Poco::UInt16 SocketAddress::port() const
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{
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return ntohs(_pImpl->port());
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}
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poco_socklen_t SocketAddress::length() const
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{
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return _pImpl->length();
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}
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const struct sockaddr* SocketAddress::addr() const
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{
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return _pImpl->addr();
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}
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int SocketAddress::af() const
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{
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return _pImpl->af();
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}
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std::string SocketAddress::toString() const
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{
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std::string result;
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if (host().family() == IPAddress::IPv6)
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result.append("[");
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result.append(host().toString());
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if (host().family() == IPAddress::IPv6)
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result.append("]");
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result.append(":");
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NumberFormatter::append(result, port());
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return result;
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}
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void SocketAddress::init(const IPAddress& host, Poco::UInt16 port)
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{
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if (host.family() == IPAddress::IPv4)
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_pImpl = new IPv4SocketAddressImpl(host.addr(), htons(port));
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#if defined(POCO_HAVE_IPv6)
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else if (host.family() == IPAddress::IPv6)
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_pImpl = new IPv6SocketAddressImpl(host.addr(), htons(port), host.scope());
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#endif
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else throw Poco::NotImplementedException("unsupported IP address family");
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}
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void SocketAddress::init(const std::string& host, Poco::UInt16 port)
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{
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IPAddress ip;
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if (IPAddress::tryParse(host, ip))
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{
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init(ip, port);
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}
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else
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{
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HostEntry he = DNS::hostByName(host);
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HostEntry::AddressList addresses = he.addresses();
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if (addresses.size() > 0)
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{
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#if defined(POCO_HAVE_IPv6)
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// if we get both IPv4 and IPv6 addresses, prefer IPv4
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std::sort(addresses.begin(), addresses.end(), AFLT());
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#endif
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init(addresses[0], port);
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}
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else throw HostNotFoundException("No address found for host", host);
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}
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}
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Poco::UInt16 SocketAddress::resolveService(const std::string& service)
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{
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unsigned port;
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if (NumberParser::tryParseUnsigned(service, port) && port <= 0xFFFF)
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{
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return (UInt16) port;
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}
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else
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{
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#if defined(POCO_VXWORKS)
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throw ServiceNotFoundException(service);
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#else
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struct servent* se = getservbyname(service.c_str(), NULL);
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if (se)
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return ntohs(se->s_port);
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else
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throw ServiceNotFoundException(service);
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#endif
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}
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}
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} } // namespace Poco::Net
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