https://cseweb.ucsd.edu/classes/wi19/cse124-a/ Recent content in Home on cse124 Hugo -- gohugo.io en-us Thu, 07 Feb 2019 10:07:08 -0500 https://cseweb.ucsd.edu/classes/wi19/cse124-a/projects/pa2/ Thu, 07 Feb 2019 10:07:08 -0500 https://cseweb.ucsd.edu/classes/wi19/cse124-a/projects/pa2/ SurfStore In this project you are going to create a cloud-based file storage service called SurfStore. SurfStore is a networked file storage application that is based on DropBox, and lets you sync file to and from the “cloud”. You will implement the cloud service, and a client which interacts with your service via RPC. Multiple clients can concurrently connect to the SurfStore service to access a common, shared set of files. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/22/gdb-on-the-lab-machines/ Tue, 22 Jan 2019 17:24:37 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/22/gdb-on-the-lab-machines/ To use the gdb debugger on the lab computers (ieng6), you need to type the following command first: $ module unload python-3.6.2 $ gdb ... https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/21/pa-1-framing-and-parsing-tips/ Mon, 21 Jan 2019 15:25:16 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/21/pa-1-framing-and-parsing-tips/ To get started on your web server, you’re going to need to have your server read in one (or more than one) request(s). But how to do that? Consider a simplified version of this problem: you’ve got an unknown number of HTTP requests, each of which is variable size, separated by the four-byte delimiter <CR><LF><CR><LF>. Note that in C++, these bytes are specified as "\r\n\r\n". However, all you have is a recv() call which returns one or more bytes. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/19/sample-code-for-the-sockets-client/ Sat, 19 Jan 2019 17:12:30 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/19/sample-code-for-the-sockets-client/ This is some example code we used in class covering the creation of a client socket example. DieWithMessage.c #include <stdio.h> #include <stdlib.h> void DieWithUserMessage(const char *msg, const char *detail) { fputs(msg, stderr); fputs(": ", stderr); fputs(detail, stderr); fputc('\n', stderr); exit(1); } void DieWithSystemMessage(const char *msg) { perror(msg); exit(1); } DieWithMessage.c CC=g++ CFLAGS=-ggdb -std=c++11 -Wall -pedantic -Wno-sign-compare all: client client: TCPClient.c DieWithMessage.c $(CC) $(CFLAGS) -o client TCPClient.c DieWithMessage.c clean: rm -rf client client. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/15/literature-server/ Tue, 15 Jan 2019 14:44:58 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/15/literature-server/ In Jan 16’s class, we’re going to code up a simple TCP client using TCP sockets. If you want to practice on your own, I’ve setup a literature server that serves out a piece of text. You can access this server via: Host: ec2-52-16-48-1.eu-west-1.compute.amazonaws.com Port: 5000 In addition to your own C/C++ client code, you can use standard UNIX utilities to access this server as well: $ nc ec2-52-16-48-1. https://cseweb.ucsd.edu/classes/wi19/cse124-a/projects/pa1/ Sun, 13 Jan 2019 12:05:22 -0500 https://cseweb.ucsd.edu/classes/wi19/cse124-a/projects/pa1/ Overview In this project, you are going to build a simple webserver that implements a subset of the HTTP/1.1 protocol specification called TritonHTTP, defined here. Project details Basic web server functionality At a high level, a web server listens for connections on a socket (bound to a specific address and port on a host machine). Clients connect to this socket and use the TritonHTTP protocol to retrieve files from the server. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/12/tritonhttp-specification/ Sat, 12 Jan 2019 12:00:31 -0700 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/12/tritonhttp-specification/ Overview This document describes a minimal subset of the HTTP/1.1 protocol specification. For this class, please consider this spec as the definitive guide for implementing HTTP–as such, we are going to call it TritonHTTP. Please do not consult other references to actual HTTP found online. Portions of this specification are courtesy of James Marshall, used with permission from the author. Client/server protocol TritonHTTP is a client-server protocol that is layered on top of the reliable stream-oriented transport protocol TCP. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/11/practice-set-1/ Fri, 11 Jan 2019 09:33:36 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/11/practice-set-1/ Here are a few practice problems to cover week 1 of the course. The solutions will be posted at the end of week 2. This problem set is optional and will not count towards your grade. Peterson & Davie Link to a PDF of the textbook Problems: 1.3, 1.5, 1.13, 1.20, 1.22, 3.55, 3.68, 3.73 Solution A link to a sample solution https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/10/cpp-sockets-resources/ Thu, 10 Jan 2019 11:43:38 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/10/cpp-sockets-resources/ If you are new to (or rusty with) C++, you can learn the fundamentals via a set of online video courses: Online C++ video tutorial Beej’s guide to network programming: bgnet Guide to Geek’s reference geek https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/c-training/ Sun, 06 Jan 2019 16:05:17 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/c-training/ For the projects, we’re going to be using either C or C++. If you’re feeling a bit rusty (or haven’t been exposed to C or C++ thus far), you can take some online training via “PluralSight”. PluralSight is an online MOOC where you can watch some videos on how to program in C++, C++ fundamentals, and C++ language features. The online courses take a few hours to complete, and come with companion code, exercises, etc. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/q-a-and-piazza/ Sun, 06 Jan 2019 13:22:26 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/q-a-and-piazza/ Most courses at UCSD use the Piazza message board for handling Q&A. Piazza has chosen a business model in which is offers its message board to students and faculty for “free”, and makes its money by selling student data to 3rd party companies. In particular, the data Piazza sells is not anonymous or aggregate data, but personally identifiable data linked to individual students. Instead of relying on this service, we’re going to use Google’s “Q&A” message board. https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/welcome/ Sun, 06 Jan 2019 13:08:45 -0800 https://cseweb.ucsd.edu/classes/wi19/cse124-a/post/2019/01/06/welcome/ Welcome to CSE 124! https://cseweb.ucsd.edu/classes/wi19/cse124-a/schedule/ Tue, 01 Jan 2019 11:42:31 -0500 https://cseweb.ucsd.edu/classes/wi19/cse124-a/schedule/ Topic 1 Topic: Introduction, network programming, layering, framing, parsing, addressing, UDP and TCP sockets, HTTP and the web Reading: Van Steen 1 (Intro), 2.1 (Architectures), P&D 1.3 (Layering), 1.4 (sockets), 1.5 (performance), 2.3 (Framing), P&D 5.1 (UDP), 5.2 (TCP), Beej’s socket guide Mon Jan 7: Introduction and course overview slides Wed Jan 9: Networking fundamentals, IP addresses slides Fri Jan 11: Addressing, Layering, TCP slides discussion slides Sun Jan 13: Project 1 out Mon Jan 14: Client and server sockets programming slides Wed Jan 16: Sockets programming (continued) slides Fri Jan 18: HTTP and the web slides discussion slides Topic 2 Topic: Remote procedure calls and networked storage, network programming via message passing https://cseweb.ucsd.edu/classes/wi19/cse124-a/courseoverview/ Mon, 10 Dec 2018 19:47:34 -0700 https://cseweb.ucsd.edu/classes/wi19/cse124-a/courseoverview/ Logistics Teaching staff Professor: George Porter Email: gmporter@cs.ucsd.edu Office: CSE 3104 Office hours: Tuesday 2:00-3:00pm Instructor website: http://www.cs.ucsd.edu/~gmporter TA: Aashi Jain Email: a2jain@ucsd.edu Office hours: Wed 8-10am, EBU3B B215 TA: Kunal Kashilikar Email: kkashilk@eng.ucsd.edu Office hours: Thu 3:30-5:30 pm, location EBU3B Room B215 TA: Siddarth Ravichandran Email: s2ravich@eng.ucsd.edu Office hours: Tue 9am-11am, location EBU3B Room 260A Discussion sections 964136, Fri 12:00p-12:50pm, Center 212 Required texts The texts below are available for free online.