//===-- SocketAddress.h -----------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_SocketAddress_h_
#define liblldb_SocketAddress_h_

// C Includes
#include <stdint.h>

#ifdef _WIN32
#include "lldb/Host/windows/windows.h"
#include <winsock2.h>
#include <WS2tcpip.h>
typedef ADDRESS_FAMILY sa_family_t;
#else
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#endif

#if defined(__FreeBSD__)
#include <sys/types.h>
#endif

// C++ Includes
// Other libraries and framework includes
// Project includes

namespace lldb_private {

class SocketAddress
{
public:
    //------------------------------------------------------------------
    // Constructors and Destructors
    //------------------------------------------------------------------
    SocketAddress ();
    SocketAddress (const struct sockaddr &s);
    SocketAddress (const struct sockaddr_in &s);
    SocketAddress (const struct sockaddr_in6 &s);
    SocketAddress (const struct sockaddr_storage &s);
    SocketAddress (const SocketAddress& rhs);
    ~SocketAddress ();

    //------------------------------------------------------------------
    // Operators
    //------------------------------------------------------------------
    const SocketAddress&
    operator=(const SocketAddress& rhs);

    const SocketAddress&
    operator=(const struct addrinfo *addr_info);

    const SocketAddress&
    operator=(const struct sockaddr &s);

    const SocketAddress&
    operator=(const struct sockaddr_in &s);

    const SocketAddress&
    operator=(const struct sockaddr_in6 &s);

    const SocketAddress&
    operator=(const struct sockaddr_storage &s);
    
    //------------------------------------------------------------------
    // Clear the contents of this socket address
    //------------------------------------------------------------------
    void
    Clear ();

    //------------------------------------------------------------------
    // Get the length for the current socket address family
    //------------------------------------------------------------------
    socklen_t
    GetLength () const;

    //------------------------------------------------------------------
    // Get the mex length for the the largest socket address supported.
    //------------------------------------------------------------------
    static socklen_t
    GetMaxLength ();

    //------------------------------------------------------------------
    // Get the socket address family 
    //------------------------------------------------------------------
    sa_family_t
    GetFamily () const;

    //------------------------------------------------------------------
    // Set the socket address family 
    //------------------------------------------------------------------
    void
    SetFamily (sa_family_t family);

    //------------------------------------------------------------------
    // Get the port if the socket address for the family has a port
    //------------------------------------------------------------------
    uint16_t
    GetPort () const;

    //------------------------------------------------------------------
    // Set the port if the socket address for the family has a port. 
    // The family must be set correctly prior to calling this function.
    //------------------------------------------------------------------
    bool
    SetPort (uint16_t port);

    //------------------------------------------------------------------
    // Set the socket address according to the first match from a call
    // to getaddrinfo() (or equivalent functions for systems that don't
    // have getaddrinfo(). If "addr_info_ptr" is not NULL, it will get
    // filled in with the match that was used to populate this socket
    // address.
    //------------------------------------------------------------------
    bool
    getaddrinfo (const char *host,          // Hostname ("foo.bar.com" or "foo" or IP address string ("123.234.12.1" or "2001:0db8:85a3:0000:0000:8a2e:0370:7334")
                 const char *service,       // Protocol name ("tcp", "http", etc) or a raw port number string ("81")
                 int ai_family = PF_UNSPEC,
                 int ai_socktype = 0,
                 int ai_protocol = 0,
                 int ai_flags = 0);

    //------------------------------------------------------------------
    // Quick way to set the SocketAddress to localhost given the family.
    // Returns true if successful, false if "family" doesn't support 
    // localhost or if "family" is not supported by this class.
    //------------------------------------------------------------------
    bool
    SetToLocalhost (sa_family_t family, 
                    uint16_t port);

    bool
    SetToAnyAddress (sa_family_t family,
                     uint16_t port);

    //------------------------------------------------------------------
    // Returns true if there is a valid socket address in this object.
    //------------------------------------------------------------------
    bool
    IsValid () const;

    //------------------------------------------------------------------
    // Direct access to all of the sockaddr structures
    //------------------------------------------------------------------
    struct sockaddr &
    sockaddr ()
    {
        return m_socket_addr.sa;
    }

    const struct sockaddr &
    sockaddr () const
    {
        return m_socket_addr.sa;
    }
    
    struct sockaddr_in &
    sockaddr_in ()
    {
        return m_socket_addr.sa_ipv4;
    }
    
    const struct sockaddr_in &
    sockaddr_in () const
    {
        return m_socket_addr.sa_ipv4;
    }
    
    struct sockaddr_in6 &
    sockaddr_in6 ()
    {
        return m_socket_addr.sa_ipv6;
    }
    
    const struct sockaddr_in6 &
    sockaddr_in6 () const
    {
        return m_socket_addr.sa_ipv6;
    }
    
    struct sockaddr_storage &
    sockaddr_storage ()
    {
        return m_socket_addr.sa_storage;
    }

    
    const struct sockaddr_storage &
    sockaddr_storage () const
    {
        return m_socket_addr.sa_storage;
    }
    
    
    //------------------------------------------------------------------
    // Conversion operators to allow getting the contents of this class
    // as a pointer to the appropriate structure. This allows an instance
    // of this class to be used in calls that take one of the sockaddr
    // structure variants without having to manally use the correct
    // accessor function.
    //------------------------------------------------------------------
    
    operator struct sockaddr * ()
    {
        return &m_socket_addr.sa;
    }
    
    operator const struct sockaddr * () const
    {
        return &m_socket_addr.sa;
    }

    operator struct sockaddr_in * ()
    {
        return &m_socket_addr.sa_ipv4;
    }
    
    operator const struct sockaddr_in * () const
    {
        return &m_socket_addr.sa_ipv4;
    }

    operator struct sockaddr_in6 * ()
    {
        return &m_socket_addr.sa_ipv6;
    }
    
    operator const struct sockaddr_in6 * () const
    {
        return &m_socket_addr.sa_ipv6;
    }

    operator const struct sockaddr_storage * () const
    {
        return &m_socket_addr.sa_storage;
    }

    operator struct sockaddr_storage * ()
    {
        return &m_socket_addr.sa_storage;
    }

    
protected:
    typedef union sockaddr_tag
    {
        struct sockaddr         sa;
        struct sockaddr_in      sa_ipv4;
        struct sockaddr_in6     sa_ipv6;
        struct sockaddr_storage sa_storage;
    } sockaddr_t;

    //------------------------------------------------------------------
    // Classes that inherit from SocketAddress can see and modify these
    //------------------------------------------------------------------
    sockaddr_t m_socket_addr;
};


} // namespace lldb_private


#endif  // liblldb_SocketAddress_h_