Announcements (Continued)

Today's Agenda
- Finish up multithreading by completing the ice-cream-parlor simulation.
- Start networking!
  - Review telnet, ports, Google, RSS News Feeds, and the Facebook Graph from the command line and the browser.
  - Implement a time server two ways.
    - Introduce the notion of a socket, which is a glorified descriptor that allows two-way communcation (that means reading and writing on the same descriptor).
    - Implement a time server using raw sockets and the write system call.
    - Implement a second time server that layers a third-party C++ stream over the client socket so we can use C++'s stream semantics instead of the raw read and write system calls.
    - Implement a third time server that's similar to the second one, except that it uses multithreading. Yay!
  - Present set of high-level parallels outlining how similar normal function calls, system function calls, interprocess communication via pipes, and (finally) interhost communication via sockets are all fundamentally the same thing.
  - Time permitting, implement a few network client applications.
- Reading:
  - Read Sections 4.1 and 4.2 of the Saltzer & Kaashoek textbook. These two sections provide a wonderful discussion of the client-server model.
  - Read all of Chapter 11 of Bryant & O'Hallaron (which is the third chapter of your reader).