Assignment: Basic Networking - Ping - Revision history

Akoehler: /* Ethernet Driver */

2009-04-21T17:58:38Z

Ethernet Driver

Akoehler: /* Echo Reply (Ping) Server */

2009-04-21T17:56:02Z

Echo Reply (Ping) Server

Akoehler: /* Echo Request (Ping) Client */

2009-04-21T17:54:12Z

Echo Request (Ping) Client

Akoehler: /* The Xinu Shell */

2009-04-21T17:48:33Z

The Xinu Shell

Akoehler: /* Provided Network Pieces */

2009-04-21T17:47:34Z

Provided Network Pieces

Akoehler: /* Provided Network Pieces */

2009-04-21T17:46:52Z

Provided Network Pieces

Akoehler: /* Packet Demultiplexing */

2009-03-26T17:22:54Z

Packet Demultiplexing

Akoehler: /* Student Implementation */

2009-03-26T17:22:08Z

Student Implementation

Akoehler: /* Address Resolution Protocol */

2009-03-26T17:07:23Z

Address Resolution Protocol

Akoehler: /* Implementation */

2009-03-26T17:07:04Z

Implementation

@@ Line 13: / Line 13: @@
 == Ethernet Driver ==
 This project tarball equips your Xinu kernel with a block-oriented, asynchronous ethernet driver for the router's built-in BCM4713 network interface. You are not required to modify the ethernet driver (directory ''device/ether/''), but it wouldn't be a bad idea to familiarize yourself with its workings. It follows the same standard device abstraction as we have seen in the TTY and disk device drivers.
 == Student Implementation ==

@@ Line 17: / Line 17: @@
 Your task for this assignment is to implement a version ''ping'' that allows your main programs to send ''echo request'' packets to other machines and allows other machines to send ''echo requests'' packets to your allocated backend.  This project can be split into two distinct parts, the client and the server.  You should first implement a server that allows other machines to ''ping'' your backend while it is running.  The second part of this project is to implement the client side which will allow you to write a main process that can ''ping'' other machines.  In each of these parts you will deal with two types of ICMP packets, ''echo request'' and ''echo reply'' packets.  The ''request'' packets are sent from a client to a target machine that is running a ping server.  The ''reply'' packets are sent in response to a client's request back to the client.
 === Echo Reply (Ping) Server ===
-The server implementation should break down ''echo request'' packets that have been received from other machines and then send proper ''echo reply'' packets back to the client that sent the request.
+The Ping Server is a process spawned by the ''pingserver'' shell command to listen to the Ethernet device for ping requests and construct correct replies. (See [[wikipedia:Ping|Echo Reply]].)
 === Echo Request (Ping) Client ===
 The project tarball includes a starter stub for a ping command in the shell directory file ''shell/xsh_ping.c''.

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 The server implementation should break down ''echo request'' packets that have been received from other machines and then send proper ''echo reply'' packets back to the client that sent the request.
 === Echo Request (Ping) Client ===
 == Resources ==

@@ Line 9: / Line 9: @@
 You should now see the new project files in with your old files. Be certain to <code>make clean</code> before compiling for the first time.
 == The Xinu Shell ==
-With the addition of a full-featured TTY driver in the previous assignment, we can now add the command-line Xinu user interface, the Xinu Shell to the system. The new tarball includes a new subdirectory shell/ that provides the I/O processing necessary to parse user input and launch a small set of commands. Several useful commands are provided as examples. This assignment will be concerned primarily with the ping and pingserver commands.
+With the addition of a full-featured TTY driver in the previous assignment, we can now add the command-line Xinu user interface, the ''Xinu Shell'' to the system. The new tarball includes a new subdirectory ''shell/'' that provides the I/O processing necessary to parse user input and launch a small set of commands. Several useful commands are provided as examples. This assignment will be concerned primarily with the ''ping'' and ''pingserver'' commands.
 == Ethernet Driver ==
 This project tarball equips your Xinu kernel with a block-oriented, asynchronous ethernet driver for the router's built-in BCM4713 network interface. You are not required to modify the ethernet driver (directory ''device/ether/''), but it wouldn't be a bad idea to familiarize yourself with its workings. It follows the same standard device abstraction as we have seen in the TTY and disk device drivers.

@@ Line 10: / Line 10: @@
 == The Xinu Shell ==
 With the addition of a full-featured TTY driver in the previous assignment, we can now add the command-line Xinu user interface, the Xinu Shell to the system. The new tarball includes a new subdirectory shell/ that provides the I/O processing necessary to parse user input and launch a small set of commands. Several useful commands are provided as examples. This assignment will be concerned primarily with the ping and pingserver commands.
-== Provided Network Pieces ==
+== Ethernet Driver ==
-=== Ethernet Driver ===
+This project tarball equips your Xinu kernel with a block-oriented, asynchronous ethernet driver for the router's built-in BCM4713 network interface. You are not required to modify the ethernet driver (directory ''device/ether/''), but it wouldn't be a bad idea to familiarize yourself with its workings. It follows the same standard device abstraction as we have seen in the TTY and disk device drivers.
 == Student Implementation ==

@@ Line 12: / Line 12: @@
 === Address Resolution Protocol (ARP) ===
-=== Packet Demultiplexing ===
+=== Basic Packet Demultiplexing ===
 == Student Implementation ==
 Your task for this assignment is to implement a version ''ping'' that allows your main programs to send ''echo request'' packets to other machines and allows other machines to send ''echo requests'' packets to your allocated backend.  This project can be split into two distinct parts, the client and the server.  You should first implement a server that allows other machines to ''ping'' your backend while it is running.  The second part of this project is to implement the client side which will allow you to write a main process that can ''ping'' other machines.  In each of these parts you will deal with two types of ICMP packets, ''echo request'' and ''echo reply'' packets.  The ''request'' packets are sent from a client to a target machine that is running a ping server.  The ''reply'' packets are sent in response to a client's request back to the client.