发送的OVERLAPPED结构
00037 typedef struct _SOCK_OVERLAPPED_SEND_CONTEXT {
00038 
00039     //
00040     // Links onto the queue list.
00041     //
00042 
00043     LIST_ENTRY QueueListEntry;
00044 
00045     //
00046     // Captured WSABUF array.
00047     //
00048 
00049     LPWSABUF CapturedBufferArray;
00050     DWORD CapturedBufferCount;
00051 
00052     //
00053     // Send flags.
00054     //
00055 
00056     DWORD Flags;
00057 
00058     //
00059     // send[to] flag.
00060     //
00061 
00062     BOOL SendTo;
00063 
00064     //
00065     // Address info (for WSPSendTo() only).
00066     //
00067 
00068     LPSOCKADDR SocketAddress;
00069     INT SocketAddressLength;
00070 
00071     //
00072     // Overlapped completion info.
00073     //
00074 
00075     LPWSAOVERLAPPED Overlapped;
00076     LPWSAOVERLAPPED_COMPLETION_ROUTINE CompletionRoutine;
00077     WSATHREADID ThreadId;
00078 
00079 } SOCK_OVERLAPPED_SEND_CONTEXT, *PSOCK_OVERLAPPED_SEND_CONTEXT;
recv的overlapped数据结构
00037 typedef struct _SOCK_OVERLAPPED_RECEIVE_CONTEXT {
00038 
00039     //
00040     // Links onto the queue list.
00041     //
00042 
00043     LIST_ENTRY QueueListEntry;
00044 
00045     //
00046     // Captured WSABUF array.
00047     //
00048 
00049     LPWSABUF CapturedBufferArray;
00050     DWORD CapturedBufferCount;
00051 
00052     //
00053     // Receive flags.
00054     //
00055 
00056     DWORD Flags;
00057 
00058     //
00059     // recv[from] flag.
00060     //
00061 
00062     BOOL RecvFrom;
00063 
00064     //
00065     // Address info (for WSPRecvFrom() only).
00066     //
00067 
00068     LPSOCKADDR SocketAddress;
00069     LPINT SocketAddressLength;
00070 
00071     //
00072     // Overlapped completion info.
00073     //
00074 
00075     LPWSAOVERLAPPED Overlapped;
00076     LPWSAOVERLAPPED_COMPLETION_ROUTINE CompletionRoutine;
00077     WSATHREADID ThreadId;
00078 
00079 } SOCK_OVERLAPPED_RECEIVE_CONTEXT, *PSOCK_OVERLAPPED_RECEIVE_CONTEXT;
完成端口请求的包结构
00374 typedef enum _COMPLETION_PACKET_TYPE {
00375     IopCompletionPacketIrp,
00376     IopCompletionPacketMini,
00377     IopCompletionPacketQuota
00378 } COMPLETION_PACKET_TYPE, *PCOMPLETION_PACKET_TYPE;
00379 
00380 //
00381 // Define the type for completion packets inserted onto completion ports when
00382 // there is no full I/O request packet that was used to perform the I/O
00383 // operation.  This occurs when the fast I/O path is used, and when the user
00384 // directly inserts a completion message.
00385 //
00386 typedef struct _IOP_MINI_COMPLETION_PACKET {
00387 
00388     //
00389     // The following unnamed structure must be exactly identical
00390     // to the unnamed structure used in the IRP overlay section used
00391     // for completion queue entries.
00392     //
00393 
00394     struct {
00395 
00396         //
00397         // List entry - used to queue the packet to completion queue, among
00398         // others.
00399         //
00400 
00401         LIST_ENTRY ListEntry;
00402 
00403         union {
00404 
00405             //
00406             // Current stack location - contains a pointer to the current
00407             // IO_STACK_LOCATION structure in the IRP stack.  This field
00408             // should never be directly accessed by drivers.  They should
00409             // use the standard functions.
00410             //
00411 
00412             struct _IO_STACK_LOCATION *CurrentStackLocation;
00413 
00414             //
00415             // Minipacket type.
00416             //
00417 
00418             ULONG PacketType;
00419         };
00420     };
00421 
00422     PVOID KeyContext;
00423     PVOID ApcContext;
00424     NTSTATUS IoStatus;
00425     ULONG_PTR IoStatusInformation;
00426 } IOP_MINI_COMPLETION_PACKET, *PIOP_MINI_COMPLETION_PACKET;