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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 TDESOCKETADDRESS_H
+#define TDESOCKETADDRESS_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 tdesocketaddress.h tdesocketaddress.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 tdesocketaddress.h tdesocketaddress.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 invalidate 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 invalidate 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 tdesocketaddress.h tdesocketaddress.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 tdesocketaddress.h tdesocketaddress.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