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Sockets Programming

Sockets Programming. Network API Socket Structures Socket Functions. 3 / 1 - 11. Network Application Programming Interface (API). The services provided by the operating system that provide the interface between application and protocol software. 3 / 2 - 11. Network API.

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Sockets Programming

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  1. Sockets Programming • Network API • Socket Structures • Socket Functions 3 / 1 - 11

  2. Network Application Programming Interface (API) The services provided by the operating system that provide the interface between application and protocol software. 3 / 2 - 11

  3. Network API • Generic Programming Interface. • Support for message oriented and connection oriented communication. • Uses the existing I/O services • Operating System independence. • Support multiple communication protocol suites (families): IPv4, IPv6, XNS, UNIX. • Provide special services for Client and Server? 3 / 3 - 11

  4. TCP/IP • There are a variety of APIs for use with TCP/IP: • Sockets • TLI • Winsock • MacTCP 3 / 4 - 11

  5. Functions Socket • Specify local and remote communication endpoints • Initiate a connection • Wait for incoming connection • Send and receive data • Terminate a connection gracefully • Error handling 3 / 5 - 11

  6. Bind • The bind() system call is used to assign an address to an existing socket. • bind returns 0 if successful or -1 on error. • calling bind() assigns the address specified by the sockaddr structure to the socket descriptor. 3 / 6 - 11

  7. Fungsi Dari Bind • Server would like to bind to a well known address (port number). • Client can bind to a specific port. • Client can ask the O.S. to assign any available port number. • Clients typically don’t care what port they are assigned • When you call bind you can tell it assign you any available port • How can you find out what your IP address is so you can tell bind() ? • There is no realistic way for you to know the right IP address to give bind() - what if the computer has multiple network interfaces? 3 / 7 - 11

  8. 3 / 8 - 11

  9. Pengenalan winsock pada Visual Basic atau Visual C++ 3 / 9 - 11

  10. Pengenalan winsock pada Visual Basic atau Visual C++ 3 / 10 - 11

  11. Pengenalan winsock pada Visual Basic atau Visual C++ 3 / 11 - 11

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