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TCP/IP and Unix

TCP/IP and Unix. Chuck Davin University of Pennsylvania CSE 350 22 February 2001. Some Recent History. Some Recent History. Resources Planning Dependencies Communication Knowledge. Engineering  Success. 10 to 50 Percent “failure” rate Lots of time Lots of money

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TCP/IP and Unix

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  1. TCP/IP and Unix Chuck Davin University of Pennsylvania CSE 350 22 February 2001

  2. Some Recent History

  3. Some Recent History • Resources • Planning • Dependencies • Communication • Knowledge

  4. Engineering  Success • 10 to 50 Percent “failure” rate • Lots of time • Lots of money • Classroom  “Reality”

  5. Audience • Embedded Software  User Software • Mass-Market  Custom

  6. BSD  TCP/IP • API  Protocol • Host  Router • Host  Application Gateway • Default Router  0.0.0.0

  7. Multihoming • The bind () system call • INADDR_ANY • Defaults and Wildcards

  8. BSD  OSI • BSD Sockets  SVR4 Streams • Configure IP adaptation via ifconfig • Configure IP via routing table • Configure TCP via bind,connect • What is a BSD “Interface”? • What is a BSD “Socket”?

  9. BSD Sockets • A Triumph of Abstraction • Focus on Synchronization • read (fd, buf, n) != n

  10. Subnets and Routing • IP “Classic” was classful • IP Subnetting introduced ca. 1986-7 • Variable Length Subnet Masks? • Non-contiguous Subnet Masks? • Longest Match IP Routing • RIP, RIP2, OSPF, CLNP

  11. Broader Horizons • RFC 791 et al. • BSD  TCP/IP

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