We have implemented the specification of PIM-DM (RFC3973). This repository stores the implementation of this protocol. The implementation is written in Python language and is destined to Linux systems.
- Linux machine
- Python3 (we have written all code to be compatible with at least Python v3.2)
- pip (to install all dependencies)
You may need sudo permissions, in order to run this protocol. This is required because we use raw sockets to exchange control messages. For this reason, some sockets to work properly need to have super user permissions.
First clone this repository:
git clone https://github.com/pedrofran12/pim_dm.git
Then enter in the cloned repository and install the protocol:
sudo python3 setup.py install
And that's it :D
To interact with the protocol you need to execute the
pim-dm command. You may need to specify a command and corresponding arguments:
pim-dm -COMMAND ARGUMENTS
Start protocol process
In order to start the protocol you first need to explicitly start it. This will start a daemon process, which will be running in the background. The command is the following:
sudo pim-dm -start
After starting the protocol process you can enable the protocol in specific interfaces. You need to specify which interfaces will have IGMP enabled and which interfaces will have PIM-DM enabled.
To enable PIM-DM without State-Refresh, in a given interface, you need to run the following command:
sudo pim-dm -ai INTERFACE_NAME
To enable PIM-DM with State-Refresh, in a given interface, you need to run the following command:
sudo pim-dm -aisf INTERFACE_NAME
To enable IGMP in a given interface, you need to run the following command:
sudo pim-dm -aiigmp INTERFACE_NAME
If you have previously enabled PIM-DM on an interface without State-Refresh and want to enable it, you first need to disable this interface, and then run the command -aisr. The same happens when you want to disable State Refresh in a previously enabled StateRefresh interface.
To remove a previously added interface, you need run the following commands:
To remove a previously added PIM-DM interface:
sudo pim-dm -ri INTERFACE_NAME
To remove a previously added IGMP interface:
sudo pim-dm -riigmp INTERFACE_NAME
Stop protocol process
If you want to stop the protocol process, and stop the daemon process, you need to explicitly run this command:
sudo pim-dm -stop
Commands for monitoring the protocol process
We have built some list commands that can be used to check the "internals" of the implementation.
Show all router interfaces and which ones have PIM-DM and IGMP enabled. For IGMP enabled interfaces check the IGMP Querier state.
sudo pim-dm -li
Verify neighbors that have established a neighborhood relationship.
sudo pim-dm -ln
List all state machines and corresponding state of all trees that are being monitored. Also list IGMP state for each group being monitored.
sudo pim-dm -ls
Multicast Routing Table
List Linux Multicast Routing Table (equivalent to
ip mroute -show)
sudo pim-dm -mr
In order to determine which commands and corresponding arguments are available you can call the help command:
Files tree/globals.py and igmp/igmp_globals.py store all timer values and some configurations regarding IGMP and the PIM-DM. If you want to tune the implementation, you can change the values of these files. These configurations are used by all interfaces, meaning that there is no tuning per interface.
We have performed tests to our PIM-DM implementation. You can check on the corresponding branches:
- Test_PIM_Hello - Topology used to test the establishment of adjacency between routers.
- Test_PIM_BroadcastTree - Topology used to test our implementation regarding the creation and maintenance of the broadcast tree.
- Test_PIM_Assert - Topology used to test the election of the AssertWinner.
- Test_PIM_Join_Prune_Graft - Topology used to test the Pruning and Grafting of the multicast distribution tree.
- Test_PIM_StateRefresh - Topology used to test PIM-DM State Refresh.
- Test_IGMP - Topology used to test our IGMPv2 implementation.
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