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This is a wiki for Assignment #14 in CO300

Weekly Progress

Week 1 (October 1 - 8, 2017)

• Completed setting up the Github repository for the project.
• Consulted TAs to get started with understanding of DHCP.
• Successfully installed, initialized and configured git in the local machines.
• Uploaded ns-3 source code to the github repository

Week 2 (October 9 - 16, 2017)

• Read RFC 2131.
• Read IPv4 DHCP Relay from Network OS Layer 3 Routing Configuration Guide.

Week 3 (October 17 - 24, 2017)

• Read dhcp-example.cc
• Read dhcp-header.cc

Week 4 (October 25 - 31, 2017)

• Made function call sequence diagram for DhcpClient.h ,DhcpServer.h and DhcpRelay.h (which we need to develop)
• Finalized the Topology for DHCP Relay functionality

Week 5 (November 1 - 7, 2017)

• Finished reading the relevant files involving DHCPv4 :

  • src\internet-apps\examples\dhcp-example.cc
  • src\internet-apps\helper\dhcp-helper.cc
  • src\internet-apps\helper\dhcp-helper.h
  • src\internet-apps\model\dhcp-server.cc
  • src\internet-apps\model\dhcp-server.h
  • src\internet-apps\model\dhcp-client.cc
  • src\internet-apps\model\dhcp-client.h
  • src\internet-apps\model\dhcp-header.cc
  • src\internet-apps\model\dhcp-header.h

• Added the source code and header files to include a relay agent in the network.

• Started the implementation.

Week 6 (November 8 - 15, 2017)

• Modified .cc and .h files for relay and server.
• Added example file for relay.

Week 7 (November 16 - 23, 2017)

• Continued Week 6's work.

Week 8 (November 24 - December 1, 2017)

• Resolved the issue where the relay agent didn't forward "ACK" to the client.

Summary

Completed the implementation of dhcp-relay in ns3 for a topology consisting of one server (Subnet A), one relay agent and multiple clients (Subnet B).

List of files modified :

• src\internet-apps\wscript
• src\internet-apps\examples\wscript
• src\internet-apps\helper\dhcp-helper.h
• src\internet-apps\helper\dhcp-helper.cc
• src\internet-apps\model\dhcp-server.h
• src\internet-apps\model\dhcp-server.cc

List of files newly added :

• src\internet-apps\model\dhcp-relay.cc
• src\internet-apps\model\dhcp-relay.h
• src\internet-apps\examples\dhcp-example-relay.cc