_OSSOCK.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Net / System / Net / _OSSOCK.cs / 1 / _OSSOCK.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Net { 
    using System.Net.Sockets; 
    using System.Runtime.InteropServices;
 
    //
    // Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
    //
    [StructLayout(LayoutKind.Sequential)] 
    internal struct IPMulticastRequest {
        internal int MulticastAddress; // IP multicast address of group 
        internal int InterfaceAddress; // local IP address of interface 

        internal static readonly int Size = Marshal.SizeOf(typeof(IPMulticastRequest)); 
    }

    [StructLayout(LayoutKind.Sequential)]
    internal struct Linger { 
        internal short OnOff; // option on/off
        internal short Time; // linger time 
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal struct WSABuffer {
        internal int Length; // Length of Buffer
        internal IntPtr Pointer;// Pointer to Buffer
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal class TransmitFileBuffers { 
        internal IntPtr preBuffer;// Pointer to Buffer
        internal int preBufferLength; // Length of Buffer 
        internal IntPtr postBuffer;// Pointer to Buffer
        internal int postBufferLength; // Length of Buffer
    }
 
    [StructLayout(LayoutKind.Sequential)]
    internal struct WSAData { 
        internal short wVersion; 
        internal short wHighVersion;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=257)] 
        internal string szDescription;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=129)]
        internal string szSystemStatus;
        internal short iMaxSockets; 
        internal short iMaxUdpDg;
        internal IntPtr lpVendorInfo; 
    } 

    // data structures and types needed for getaddrinfo calls. 
    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
    internal unsafe struct AddressInfo {
        internal AddressInfoHints ai_flags;
        internal AddressFamily ai_family; 
        internal SocketType ai_socktype;
        internal ProtocolFamily ai_protocol; 
        internal int ai_addrlen; 
        internal sbyte* ai_canonname;   // Ptr to the cannonical name - check for NULL
        internal byte* ai_addr;         // Ptr to the sockaddr structure 
        internal AddressInfo* ai_next;  // Ptr to the next AddressInfo structure
    }

    [Flags] 
    internal enum AddressInfoHints {
        AI_PASSIVE     = 0x01, /* Socket address will be used in bind() call */ 
        AI_CANONNAME   = 0x02, /* Return canonical name in first ai_canonname */ 
        AI_NUMERICHOST = 0x04, /* Nodename must be a numeric address string */
    } 

    [Flags]
    internal enum NameInfoFlags {
        NI_NOFQDN      = 0x01, /* Only return nodename portion for local hosts */ 
        NI_NUMERICHOST = 0x02, /* Return numeric form of the host's address */
        NI_NAMEREQD    = 0x04, /* Error if the host's name not in DNS */ 
        NI_NUMERICSERV = 0x08, /* Return numeric form of the service (port #) */ 
        NI_DGRAM       = 0x10, /* Service is a datagram service */
    } 

    // Argument structure for IPV6_ADD_MEMBERSHIP and IPV6_DROP_MEMBERSHIP.
    [StructLayout(LayoutKind.Sequential)]
    internal struct IPv6MulticastRequest { 
        [MarshalAs(UnmanagedType.ByValArray,SizeConst=16)]
        internal byte[] MulticastAddress; // IP address of group 
        internal int    InterfaceIndex;   // local interface index 

        internal static readonly int Size = Marshal.SizeOf(typeof(IPv6MulticastRequest)); 
    }

    //
    // used as last parameter to WSASocket call 
    //
    [Flags] 
    internal enum SocketConstructorFlags { 
        WSA_FLAG_OVERLAPPED         = 0x01,
        WSA_FLAG_MULTIPOINT_C_ROOT  = 0x02, 
        WSA_FLAG_MULTIPOINT_C_LEAF  = 0x04,
        WSA_FLAG_MULTIPOINT_D_ROOT  = 0x08,
        WSA_FLAG_MULTIPOINT_D_LEAF  = 0x10,
    } 
} // namespace System.Net

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Net { 
    using System.Net.Sockets; 
    using System.Runtime.InteropServices;
 
    //
    // Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
    //
    [StructLayout(LayoutKind.Sequential)] 
    internal struct IPMulticastRequest {
        internal int MulticastAddress; // IP multicast address of group 
        internal int InterfaceAddress; // local IP address of interface 

        internal static readonly int Size = Marshal.SizeOf(typeof(IPMulticastRequest)); 
    }

    [StructLayout(LayoutKind.Sequential)]
    internal struct Linger { 
        internal short OnOff; // option on/off
        internal short Time; // linger time 
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal struct WSABuffer {
        internal int Length; // Length of Buffer
        internal IntPtr Pointer;// Pointer to Buffer
    } 

    [StructLayout(LayoutKind.Sequential)] 
    internal class TransmitFileBuffers { 
        internal IntPtr preBuffer;// Pointer to Buffer
        internal int preBufferLength; // Length of Buffer 
        internal IntPtr postBuffer;// Pointer to Buffer
        internal int postBufferLength; // Length of Buffer
    }
 
    [StructLayout(LayoutKind.Sequential)]
    internal struct WSAData { 
        internal short wVersion; 
        internal short wHighVersion;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=257)] 
        internal string szDescription;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst=129)]
        internal string szSystemStatus;
        internal short iMaxSockets; 
        internal short iMaxUdpDg;
        internal IntPtr lpVendorInfo; 
    } 

    // data structures and types needed for getaddrinfo calls. 
    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
    internal unsafe struct AddressInfo {
        internal AddressInfoHints ai_flags;
        internal AddressFamily ai_family; 
        internal SocketType ai_socktype;
        internal ProtocolFamily ai_protocol; 
        internal int ai_addrlen; 
        internal sbyte* ai_canonname;   // Ptr to the cannonical name - check for NULL
        internal byte* ai_addr;         // Ptr to the sockaddr structure 
        internal AddressInfo* ai_next;  // Ptr to the next AddressInfo structure
    }

    [Flags] 
    internal enum AddressInfoHints {
        AI_PASSIVE     = 0x01, /* Socket address will be used in bind() call */ 
        AI_CANONNAME   = 0x02, /* Return canonical name in first ai_canonname */ 
        AI_NUMERICHOST = 0x04, /* Nodename must be a numeric address string */
    } 

    [Flags]
    internal enum NameInfoFlags {
        NI_NOFQDN      = 0x01, /* Only return nodename portion for local hosts */ 
        NI_NUMERICHOST = 0x02, /* Return numeric form of the host's address */
        NI_NAMEREQD    = 0x04, /* Error if the host's name not in DNS */ 
        NI_NUMERICSERV = 0x08, /* Return numeric form of the service (port #) */ 
        NI_DGRAM       = 0x10, /* Service is a datagram service */
    } 

    // Argument structure for IPV6_ADD_MEMBERSHIP and IPV6_DROP_MEMBERSHIP.
    [StructLayout(LayoutKind.Sequential)]
    internal struct IPv6MulticastRequest { 
        [MarshalAs(UnmanagedType.ByValArray,SizeConst=16)]
        internal byte[] MulticastAddress; // IP address of group 
        internal int    InterfaceIndex;   // local interface index 

        internal static readonly int Size = Marshal.SizeOf(typeof(IPv6MulticastRequest)); 
    }

    //
    // used as last parameter to WSASocket call 
    //
    [Flags] 
    internal enum SocketConstructorFlags { 
        WSA_FLAG_OVERLAPPED         = 0x01,
        WSA_FLAG_MULTIPOINT_C_ROOT  = 0x02, 
        WSA_FLAG_MULTIPOINT_C_LEAF  = 0x04,
        WSA_FLAG_MULTIPOINT_D_ROOT  = 0x08,
        WSA_FLAG_MULTIPOINT_D_LEAF  = 0x10,
    } 
} // namespace System.Net

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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_OSSOCK.cs source code in C# .NET

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