Transcript Lecture 16 Networking xlanchen@06/10/2005 计算机系•信息处理实验室 Content The OSI Reference Model Networking APIs Network-Resource Name Resolution Protocol Drivers NDIS Drivers Binding Layered Network Services xlanchen@06/10/2005 Understanding the Inside of Windows2000 计算机系 2 信息处理实验室 The OSI Reference Model Open.

Lecture 16 Networking
xlanchen@06/10/2005
计算机系•信息处理实验室
Content
The OSI Reference Model
Networking APIs
Network-Resource Name Resolution
Protocol Drivers
NDIS Drivers
Binding
Layered Network Services
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Understanding the Inside of
Windows2000
计算机系 2
信息处理实验室
The OSI Reference Model
Open Systems Interconnection (OSI) reference
model
7 layers
An idealized scheme
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Understanding the Inside of
Windows2000
计算机系 3
信息处理实验室
2K Networking Components
Networking APIs
protocol-independent
Transport Driver Interface
(TDI) clients
kernel-mode device drivers
TDI transports
kernel-mode protocol drivers
NDIS library
Ndis.sys
NDIS miniport drivers
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Understanding the Inside of
Windows2000
计算机系 4
信息处理实验室
Networking APIs
Named pipes and mailslots
Windows Sockets (Winsock)
Remote procedure call (RPC)
Common Internet File System (CIFS)
NetBIOS
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Understanding the Inside of
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计算机系 5
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Named Pipes and Mailslots
Named pipes
Provide reliable bidirectional communications
Mailslots
Provide unreliable unidirectional data transmission
Support broadcast capability
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Understanding the Inside of
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计算机系 6
信息处理实验室
Named pipe communications
\\Server\Pipe\PipeName
|
|
| a unique name
|
|
| (can include subdirectories)
|
| “Pipe”
| the computer
Example:
\\MyComputer\Pipe\MyServerApp\ConnectionPipe
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Understanding the Inside of
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计算机系 7
信息处理实验室
Named Pipe Operation
CreateNamedPipe
A pope operates in byte mode or message mode
ConnectNamedPipe
synchronously or asynchronously
CreateFile or CallNamedPipe
Establish
the connection
ReadFile and WriteFile (Win32 Func)
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Understanding the Inside of
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计算机系 8
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Mailslot Operation
Name: \\Server\MailSlot\MailSlotName
Func: CreateMailSlot, ReadFile; CreateFile,
WriteFile
Message size < 425 Bytes
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Understanding the Inside of
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计算机系 9
信息处理实验室
Named Pipe and Mailslot Implementation
Symbolic link:
\\?\Pipe;
\\?\MailSlot
Npfs.sys
Msfs.sys
Name resolution: \\.\Pipe\PipeName
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Understanding the Inside of
Windows2000
计算机系 10
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EXPERIMENT
Listing the Named Pipe Namespace and Watching
Named Pipe Activity
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Understanding the Inside of
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计算机系 11
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Windows Sockets
Microsoft's implementation of BSD Sockets
2K: Winsock 2.2
features
scatter-gather and asynchronous I/O
QoS conventions
Extensibility
integrated namespaces
multipoint messages
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Winsock Operation
Support protocols
NetBEUI, TCP/IP, IPX
After initilization:
socket; bound; listen/connect/accept; recv/send
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Understanding the Inside of
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计算机系 13
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Winsock Implementation
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Understanding the Inside of
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计算机系 14
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Remote Procedure Call
Compatible with the OSF/DCE standard
procedural view VS. transport-centered view
Remote I/O request
OS : redirector
|remote system, execute and return
|local: interrupt, & return to caller
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Understanding the Inside of
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计算机系 15
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RPC Operation
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Understanding the Inside of
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RPC Implementation
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Understanding the Inside of
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计算机系 17
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Common Internet File System (CIFS)
A published Microsoft standard
An enhanced form of the Server Message Block
(SMB) protocol
allows third parties to interoperate with 2K file
servers and with 2K file sharing clients
E.g. Samba shareware
Redirector FSD
executes on a client machine & communicates with
a server FSD
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计算机系 18
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CIFS
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Distributed File Caching
To provide a consistent view of shared remote
file
2K solution: distributed cache coherency
Mechanism: oplock
Three main types of oplock
Level I oplock
Level II oplock
Batch oplock
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计算机系 20
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Oplock example
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Understanding the Inside of
Windows2000
计算机系 21
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NetBIOS
Network Basic Input/Output System
NetBIOS Names
16byte
2K: first 15 bytes of DNS name + modifier
LANA number
unique
group
WINS
NetBIOS Names  TCP/IP addresses
NetBIOS API
Listen, …
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Understanding the Inside of
Windows2000
计算机系 22
信息处理实验室
EXPERIMENT
Using Nbtstat to See NetBIOS Names
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Understanding the Inside of
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NetBIOS API Implementation
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Understanding the Inside of
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Other Networking APIs
Telephony API (TAPI)
DCOM
Message Queuing
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Understanding the Inside of
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计算机系 25
信息处理实验室
Network-Resource Name Resolution
Multiple Provider Router
Multiple UNC Provider
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Understanding the Inside of
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计算机系 26
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Multiple Provider Router
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Understanding the Inside of
Windows2000
计算机系 27
信息处理实验室
Multiple UNC Provider
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Understanding the Inside of
Windows2000
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Domain Name System
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Protocol Drivers
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NDIS Drivers
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计算机系 31
信息处理实验室
Binding
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Understanding the Inside of
Windows2000
计算机系 32
信息处理实验室
Layered Network Services
Remote access
Active Directory
Network Load Balancing
File Replication service (FRS)
Distributed File System (DFS)
TCP/IP Extensions
Network Address Translation
Internet Protocol Security
Quality of Service
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Understanding the Inside of
Windows2000
计算机系 33
信息处理实验室
Active
Directory
architecture
xlanchen@06/10/2005
Understanding
the Inside of
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计算机系 34
信息处理实验室
Network Load Balancing operation
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Understanding the Inside of
Windows2000
计算机系 35
信息处理实验室
DFS components
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Understanding the Inside of
Windows2000
计算机系 36
信息处理实验室
QoS architecture
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Understanding the Inside of
Windows2000
计算机系 37
信息处理实验室