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tdelibs/tdecore/network/ksocketaddress.h

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/* -*- C++ -*-
* Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef KSOCKETADDRESS_H
#define KSOCKETADDRESS_H
#include <tqstring.h>
#include <tqcstring.h>
#include <tdelibs_export.h>
struct sockaddr;
struct sockaddr_in;
struct sockaddr_in6;
struct sockaddr_un;
namespace KNetwork {
class KIpAddress;
class KSocketAddress;
class KInetSocketAddress;
class KUnixSocketAddress;
/** @class KIpAddress ksocketaddress.h ksocketaddress.h
* @brief An IP address.
*
* This class represents one IP address, version 4 or 6. This is only
* the address, not including port information or other data.
*
* It is not a good programming practice to create address from objects
* like this. Instead, prefer a more thorough function like
* @ref KResolver::resolve, which also handle extra information like scope
* ids.
*
* This is a light-weight class. Most of the member functions are inlined and
* there are no virtual functions. This object's size should be less than 20
* bytes. Also note that there is no sharing of data.
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
*/
class TDECORE_EXPORT KIpAddress
{
public:
/**
* Default constructor. Creates an empty address.
* It defaults to IP version 4.
*/
inline KIpAddress() : m_version(0)
{ }
/**
* Copy constructor. Copies the data from the other
* object.
*
* Data is not shared.
*
* @param other the other
*/
inline KIpAddress(const KIpAddress& other)
{ *this = other; }
/**
* Creates an object from the given string representation.
*
* The IP version is guessed from the address format.
*
* @param addr the address
*/
inline KIpAddress(const TQString& addr)
{ setAddress(addr); }
/**
* Creates an object from the given string representation.
*
* The IP version is guessed from the address format.
*
* @param addr the address
*/
inline KIpAddress(const char* addr)
{ setAddress(addr); }
/**
* Creates an object from the given raw data and IP version.
*
* @param addr the raw data
* @param version the IP version (4 or 6)
*/
inline KIpAddress(const void* addr, int version = 4)
{ setAddress(addr, version); }
/**
* This is a convenience constructor. Constructs an object
* from the given IPv4 address in the form of an integer.
*
* Note: do not write code to depend on IPv4 addresses being
* integer types. Instead, treat them as a special type, like
* a KIpAddress or the system's in_addr.
*
* @param ip4addr the IPv4 address
*/
inline KIpAddress(TQ_UINT32 ip4addr)
{ setAddress(&ip4addr, 4); }
/**
* Destructor. This frees resources associated with this object.
*
* Note: destructor is non-virtual. The compiler will happily optimise it
* out of the way.
*/
inline ~KIpAddress()
{ }
/**
* Copy operator.
*
* Copies the data from the other object into this one.
*
* @param other the object to copy
*/
KIpAddress& operator =(const KIpAddress& other);
/**
* Returns true if the two addresses match.
* This function performs a v4-mapped check.
* @see compare
*/
inline bool operator ==(const KIpAddress& other) const
{ return compare(other, true); }
/**
* Compares this address against the other, supplied one and return
* true if they match. The @p checkMapped parameter controls whether
* a check for an IPv6 v4-mapped address will be performed.
*
* An IPv6 v4-mapped address is an IPv6 address that is, for all purposes,
* equivalent to an IPv4 one. The default behaviour of this function
* is to take that into account. If you want a strict matching,
* pass @b false to the @p checkMapped parameter.
*
* @param other the other IP address
* @param checkMapped whether v4-mapped addresses will be taken into account
*/
bool compare(const KIpAddress& other, bool checkMapped = true) const;
/**
* Retrieves the IP version in this object.
*
* @returns the version: 4 or 6
*/
inline int version() const
{ return m_version; }
/**
* Returns true if this is an IPv4 address.
*/
inline bool isIPv4Addr() const
{ return version() == 4; }
/**
* Returns true if this is an IPv6 address.
*/
inline bool isIPv6Addr() const
{ return version() == 6; }
/**
* Sets the address to the given string representation.
*
* @return true if the address was successfully parsed; otherwise returns
* false and leaves the object unchanged.
*/
bool setAddress(const TQString& address);
/**
* Sets the address to the given string representation.
*
* @return true if the address was successfully parsed; otherwise returns
* false and leaves the object unchanged.
*/
bool setAddress(const char* address);
/**
* Sets the address to the given raw binary representation.
*
* @param raw a pointer to the raw binary data
* @param version the IP version
* @return true if the address was successfully parsed; otherwise returns
* false and leaves the object unchanged.
*/
bool setAddress(const void* raw, int version = 4);
/**
* Returns the address as a string.
*/
TQString toString() const;
/**
* Returns a pointer to binary raw data representing the address.
*/
inline const void *addr() const
{ return m_data; }
/**
* This is a convenience function. Returns the IPv4 address in a
* 32-bit integer. The result is only valid if @ref isIPv4Addr returns
* true. Alternatively, if the contained IPv6 address is a v4-mapped one
* and the @p convertMapped parameter is true, the result will also be
* valid. The address returned is in network byte order.
*
* Note: you should not treat IP addresses as integers. Instead,
* use types defined for that purpose, such as KIpAddress or the
* system's in_addr type.
*
*/
inline TQ_UINT32 IPv4Addr(bool convertMapped = true) const
{
return (convertMapped && isV4Mapped()) ? m_data[3] : m_data[0];
}
/**
* This is a convenience function. Returns the IPv4 address in a
* 32-bit integer. The result is only valid if @ref isIPv4Addr returns
* true. Alternatively, if the contained IPv6 address is a v4-mapped one
* and the @p convertMapped parameter is true, the result will also be
* valid. The address returned is in host byte order.
*
*/
TQ_UINT32 hostIPv4Addr(bool convertMapped = true) const;
public:
/*-- tests --*/
/**
* Returns true if this is the IPv4 or IPv6 unspecified address.
*/
inline bool isUnspecified() const
{ return version() == 0 ? true : (*this == anyhostV4 || *this == anyhostV6); }
/**
* Returns true if this is either the IPv4 or the IPv6 localhost address.
*/
inline bool isLocalhost() const
{ return version() == 0 ? false : (*this == localhostV4 || *this == localhostV6); }
/**
* This is an alias for @ref isLocalhost.
*/
inline bool isLoopback() const
{ return isLocalhost(); }
/**
* Returns true if this is an IPv4 class A address, i.e.,
* from 0.0.0.0 to 127.255.255.255.
*
* This function does not test for v4-mapped addresses.
*/
inline bool isClassA() const
{ return version() != 4 ? false : (hostIPv4Addr() & 0x80000000) == 0; }
/**
* Returns true if this is an IPv4 class B address, i.e., one from
* 128.0.0.0 to 191.255.255.255.
*
* This function does not test for v4-mapped addresses.
*/
inline bool isClassB() const
{ return version() != 4 ? false : (hostIPv4Addr() & 0xc0000000) == 0x80000000; }
/**
* Returns true if this is an IPv4 class C address, i.e., one from
* 192.0.0.0 to 223.255.255.255.
*
* This function does not test for v4-mapped addresses.
*/
inline bool isClassC() const
{ return version() != 4 ? false : (hostIPv4Addr() & 0xe0000000) == 0xc0000000; }
/**
* Returns true if this is an IPv4 class D (a.k.a. multicast) address.
*
* Note: this function is not the same as @ref isMulticast. isMulticast also
* tests for IPv6 multicast addresses.
*/
inline bool isClassD() const
{ return version() != 4 ? false : (hostIPv4Addr() & 0xf0000000) == 0xe0000000; }
/**
* Returns true if this is a multicast address, be it IPv4 or IPv6.
*/
inline bool isMulticast() const
{
if (version() == 4) return isClassD();
if (version() == 6) return ((TQ_UINT8*)addr())[0] == 0xff;
return false;
}
/**
* Returns true if this is an IPv6 link-local address.
*/
inline bool isLinkLocal() const
{
if (version() != 6) return false;
TQ_UINT8* addr = (TQ_UINT8*)this->addr();
return (addr[0] & 0xff) == 0xfe &&
(addr[1] & 0xc0) == 0x80;
}
/**
* Returns true if this is an IPv6 site-local address.
*/
inline bool isSiteLocal() const
{
if (version() != 6) return false;
TQ_UINT8* addr = (TQ_UINT8*)this->addr();
return (addr[0] & 0xff) == 0xfe &&
(addr[1] & 0xc0) == 0xc0;
}
/**
* Returns true if this is a global IPv6 address.
*/
inline bool isGlobal() const
{ return version() != 6 ? false : !(isMulticast() || isLinkLocal() || isSiteLocal()); }
/**
* Returns true if this is a v4-mapped IPv6 address.
*/
inline bool isV4Mapped() const
{
if (version() != 6) return false;
TQ_UINT32* addr = (TQ_UINT32*)this->addr();
return addr[0] == 0 && addr[1] == 0 &&
((TQ_UINT16*)&addr[2])[0] == 0 &&
((TQ_UINT16*)&addr[2])[1] == 0xffff;
}
/**
* Returns true if this is a v4-compat IPv6 address.
*/
inline bool isV4Compat() const
{
if (version() != 6 || isLocalhost()) return false;
TQ_UINT32* addr = (TQ_UINT32*)this->addr();
return addr[0] == 0 && addr[1] == 0 && addr[2] == 0 && addr[3] != 0;
}
/**
* Returns true if this is an IPv6 node-local multicast address.
*/
inline bool isMulticastNodeLocal() const
{ return version() == 6 && isMulticast() && (((TQ_UINT32*)addr())[0] & 0xf) == 0x1; }
/**
* Returns true if this is an IPv6 link-local multicast address.
*/
inline bool isMulticastLinkLocal() const
{ return version() == 6 && isMulticast() && (((TQ_UINT32*)addr())[0] & 0xf) == 0x2; }
/**
* Returns true if this is an IPv6 site-local multicast address.
*/
inline bool isMulticastSiteLocal() const
{ return version() == 6 && isMulticast() && (((TQ_UINT32*)addr())[0] & 0xf) == 0x5; }
/**
* Returns true if this is an IPv6 organisational-local multicast address.
*/
inline bool isMulticastOrgLocal() const
{ return version() == 6 && isMulticast() && (((TQ_UINT32*)addr())[0] & 0xf) == 0x8; }
/**
* Returns true if this is an IPv6 global multicast address.
*/
inline bool isMulticastGlobal() const
{ return version() == 6 && isMulticast() && (((TQ_UINT32*)addr())[0] & 0xf) == 0xe; }
protected:
TQ_UINT32 m_data[4]; // 16 bytes, needed for an IPv6 address
char m_version;
public:
/// localhost in IPv4 (127.0.0.1)
static const KIpAddress localhostV4;
/// the any host or undefined address in IPv4 (0.0.0.0)
static const KIpAddress anyhostV4;
/// localhost in IPv6 (::1)
static const KIpAddress localhostV6;
/// the any host or undefined address in IPv6 (::)
static const KIpAddress anyhostV6;
};
class KSocketAddressData;
/** @class KSocketAddress ksocketaddress.h ksocketaddress.h
* @brief A generic socket address.
*
* This class holds one generic socket address.
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
*/
class TDECORE_EXPORT KSocketAddress
{
public:
/**
* Default constructor.
*
* Creates an empty object
*/
KSocketAddress();
/**
* Creates this object with the given data.
* The raw socket address is copied into this object.
*
* @param sa the socket address structure
* @param len the socket address length
*/
KSocketAddress(const sockaddr* sa, TQ_UINT16 len);
/**
* Copy constructor. This creates a copy of the other
* object.
*
* Data is not shared.
*
* @param other the object to copy from
*/
KSocketAddress(const KSocketAddress& other);
/**
* Destructor. Frees any associated resources.
*/
virtual ~KSocketAddress();
/**
* Performs a shallow copy of the other object into this one.
* Data will be copied.
*
* @param other the object to copy from
*/
KSocketAddress& operator =(const KSocketAddress& other);
/**
* Returns the socket address structure, to be passed down to
* low level functions.
*
* Note that this function returns NULL for invalid or empty sockets,
* so you may use to to test for validity.
*/
const sockaddr* address() const;
/**
* Returns the socket address structure, to be passed down to
* low level functions.
*
* Note that this function returns NULL for invalid or empty sockets,
* so you may use to to test for validity.
*
* The returned value, if not NULL, is an internal buffer which is guaranteed
* to be at least @ref length() bytes long.
*/
sockaddr* address();
/**
* Sets the address to the given address.
* The raw socket address is copied into this object.
*
* @param sa the socket address structure
* @param len the socket address length
*/
KSocketAddress& setAddress(const sockaddr *sa, TQ_UINT16 len);
/**
* Returns the socket address structure, to be passed down to
* low level functions.
*/
inline operator const sockaddr*() const
{ return address(); }
/**
* Returns the length of this socket address structure.
*/
TQ_UINT16 length() const;
/**
* Sets the length of this socket structure.
*
* Use this function with care. It allows you to resize the internal
* buffer to fit needs. This function should not be used except for handling
* unknown socket address structures.
*
* Also note that this function may tqinvalidate the socket if a known
* family is set (Internet or Unix socket) and the new length would be
* too small to hold the system's sockaddr_* structure. If unsure, reset
* the family:
*
* \code
* KSocketAddress qsa;
* [...]
* qsa.setFamily(AF_UNSPEC).setLength(newlen);
* \endcode
*
* @param len the new length
*/
KSocketAddress& setLength(TQ_UINT16 len);
/**
* Returns the family of this address.
* @return the family of this address, AF_UNSPEC if it's undefined
*/
int family() const;
/**
* Sets the family of this object.
*
* Note: setting the family will probably tqinvalidate any address data
* contained in this object. Use this function with care.
*
* @param family the new family to set
*/
virtual KSocketAddress& setFamily(int family);
/**
* Returns the IANA family number of this address.
* @return the IANA family number of this address (1 for AF_INET.
* 2 for AF_INET6, otherwise 0)
*/
inline int ianaFamily() const
{ return ianaFamily(family()); }
/**
* Returns true if this equals the other socket.
*
* Socket addresses are considered matching if and only if all data is the same.
*
* @param other the other socket
* @return true if both sockets are equal
*/
bool operator ==(const KSocketAddress& other) const;
/**
* Returns the node name of this socket.
*
* In the case of Internet sockets, this is string representation of the IP address.
* The default implementation returns TQString::null.
*
* @return the node name, can be TQString::null
* @bug use KResolver to resolve unknown families
*/
virtual TQString nodeName() const;
/**
* Returns the service name for this socket.
*
* In the case of Internet sockets, this is the port number.
* The default implementation returns TQString::null.
*
* @return the service name, can be TQString::null
* @bug use KResolver to resolve unknown families
*/
virtual TQString serviceName() const;
/**
* Returns this socket address as a string suitable for
* printing. Family, node and service are part of this address.
*
* @bug use KResolver to resolve unknown families
*/
virtual TQString toString() const;
/**
* Returns an object reference that can be used to manipulate this socket
* as an Internet socket address. Both objects share the same data.
*/
KInetSocketAddress& asInet();
/**
* Returns an object is equal to this object's data, but they don't share it.
*/
KInetSocketAddress asInet() const;
/**
* Returns an object reference that can be used to manipulate this socket
* as a Unix socket address. Both objects share the same data.
*/
KUnixSocketAddress& asUnix();
/**
* Returns an object is equal to this object's data, but they don't share it.
*/
KUnixSocketAddress asUnix() const;
protected:
/// @internal
/// private data
KSocketAddressData *d;
/// @internal
/// extra constructor
KSocketAddress(KSocketAddressData* d);
public: // static
/**
* Returns the IANA family number of the given address family.
* Returns 0 if there is no corresponding IANA family number.
* @param af the address family, in AF_* constants
* @return the IANA family number of this address (1 for AF_INET.
* 2 for AF_INET6, otherwise 0)
*/
static int ianaFamily(int af);
/**
* Returns the address family of the given IANA family number.
* @return the address family, AF_UNSPEC for unknown IANA family numbers
*/
static int fromIanaFamily(int iana);
};
/** @class KInetSocketAddress ksocketaddress.h ksocketaddress.h
* @brief an Internet socket address
*
* An Inet (IPv4 or IPv6) socket address
*
* This is an IPv4 or IPv6 address of the Internet.
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
*/
class TDECORE_EXPORT KInetSocketAddress: public KSocketAddress
{
friend class KSocketAddress;
public:
/**
* Public constructor. Creates an empty object.
*/
KInetSocketAddress();
/**
* Creates an object from raw data.
*
* Note: if the socket address @p sa does not contain a valid Internet
* socket (IPv4 or IPv6), this object will be empty.
*
* @param sa the sockaddr structure
* @param len the structure's length
*/
KInetSocketAddress(const sockaddr* sa, TQ_UINT16 len);
/**
* Creates an object from an IP address and port.
*
* @param host the IP address
* @param port the port number
*/
KInetSocketAddress(const KIpAddress& host, TQ_UINT16 port);
/**
* Copy constructor.
*
* Data is not shared.
*
* @param other the other object
*/
KInetSocketAddress(const KInetSocketAddress& other);
/**
* Copy constructor.
*
* If the other, generic socket address contains an Internet address,
* it will be copied. Otherwise, this object will be empty.
*
* @param other the other object
*/
KInetSocketAddress(const KSocketAddress& other);
/**
* Destroys this object.
*/
virtual ~KInetSocketAddress();
/**
* Copy operator.
*
* Copies the other object into this one.
*
* @param other the other object
*/
KInetSocketAddress& operator =(const KInetSocketAddress& other);
/**
* Cast operator to sockaddr_in.
*/
inline operator const sockaddr_in*() const
{ return (const sockaddr_in*)address(); }
/**
* Cast operator to sockaddr_in6.
*/
inline operator const sockaddr_in6*() const
{ return (const sockaddr_in6*)address(); }
/**
* Returns the IP version of the address this object holds.
*
* @return 4 or 6, if IPv4 or IPv6, respectively; 0 if this object is empty
*/
int ipVersion() const;
/**
* Returns the IP address component.
*/
KIpAddress ipAddress() const;
/**
* Sets the IP address to the given raw address.
*
* This call will preserve port numbers accross IP versions, but will lose
* IPv6 specific data if the address is set to IPv4.
*
* @param addr the address to set to
* @return a reference to itself
*/
KInetSocketAddress& setHost(const KIpAddress& addr);
/**
* Retrieves the port number stored in this object.
*
* @return a port number in the range 0 to 65535, inclusive. An empty or
* invalid object will have a port number of 0.
*/
TQ_UINT16 port() const;
/**
* Sets the port number. If this object is empty, this function will default to
* creating an IPv4 address.
*
* @param port the port number to set
* @return a reference to itself
*/
KInetSocketAddress& setPort(TQ_UINT16 port);
/**
* Converts this object to an IPv4 socket address. It has no effect if the object
* is already an IPv4 socket address.
*
* If this object is an IPv6 address, the port number is preserved. All other information
* is lost.
*
* @return a reference to itself
*/
KInetSocketAddress& makeIPv4();
/**
* Converts this object to an IPv6 socket address. It has no effect if the object
* is already an IPv6 socket address.
*
* If this object is an IPv4 address, the port number is preserved.
*
* @return a reference to itself
*/
KInetSocketAddress& makeIPv6();
/**
* Returns the flowinfo information from the IPv6 socket address.
*
* @return the flowinfo information or 0 if this object is empty or IPv4
*/
TQ_UINT32 flowinfo() const;
/**
* Sets the flowinfo information for an IPv6 socket address. If this is not
* an IPv6 socket address, this function converts it to one. See makeIPv6.
*
* @param flowinfo the flowinfo to set
* @return a reference to itself
*/
KInetSocketAddress& setFlowinfo(TQ_UINT32 flowinfo);
/**
* Returns the scope id this IPv6 socket is bound to.
*
* @return the scope id, or 0 if this is not an IPv6 object
*/
int scopeId() const;
/**
* Sets the scope id for this IPv6 object. If this is not an IPv6 socket
* address, this function converts it to one. See makeIPv6
*
* @param scopeid the scopeid to set
* @return a reference to itself
*/
KInetSocketAddress& setScopeId(int scopeid);
protected:
/// @internal
/// extra constructor
KInetSocketAddress(KSocketAddressData* d);
private:
void update();
};
/*
* External definition
*/
/** @class KUnixSocketAddress ksocketaddress.h ksocketaddress.h
* @brief A Unix (local) socket address.
*
* This is a Unix socket address.
*
* Note that this class uses QStrings to represent filenames, which means
* the proper encoding is used to translate into valid filesystem file names.
*
* @author Thiago Macieira <thiago.macieira@kdemail.net>
*/
class TDECORE_EXPORT KUnixSocketAddress: public KSocketAddress
{
friend class KSocketAddress;
public:
/**
* Default constructor. Creates an empty object.
*/
KUnixSocketAddress();
/**
* Creates this object with the given raw data. If
* the sockaddr structure does not contain a Local namespace
* (Unix) socket, this object will be created empty.
*
* @param sa the socket address structure
* @param len the structure's length
*/
KUnixSocketAddress(const sockaddr* sa, TQ_UINT16 len);
/**
* Copy constructor. Creates a copy of the other object,
* sharing the data explicitly.
*
* @param other the other object
*/
KUnixSocketAddress(const KUnixSocketAddress& other);
/**
* Constructs an object from the given pathname.
*/
KUnixSocketAddress(const TQString& pathname);
/**
* Destructor.
*/
virtual ~KUnixSocketAddress();
/**
* Copy operator. Copies the contents of the other object into
* this one. Data is explicitly shared.
*
* @param other the other
*/
KUnixSocketAddress& operator =(const KUnixSocketAddress& other);
/**
* Cast operator to sockaddr_un.
*/
inline operator const sockaddr_un*() const
{ return (const sockaddr_un*)address(); }
/**
* Returns the pathname associated with this object. Will return
* TQString::null if this object is empty.
*/
TQString pathname() const;
/**
* Sets the pathname for the object.
*
* @return a reference to itself
*/
KUnixSocketAddress& setPathname(const TQString& path);
protected:
/// @internal
/// extra constructor
KUnixSocketAddress(KSocketAddressData* d);
};
} // namespace KNetwork
#endif