python 3.6.12 support for af_qipcrt address family

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Today we’re going to talk about a feature that will make your Linux experience even better Python 3.6.12 support for af_qipcrt address family!

Now, if you’re not familiar with this fancy term, let me break it down for you in simple terms: af_qipcrt is an experimental IPv4/IPv6 over QUIC (Quick UDP Internet Connections) protocol that allows faster and more reliable data transfer. And guess what? Python 3.6.12 now supports this address family!

So, how do you use it in your scripts? Well, let’s say you want to connect to a server using af_qipcrt instead of the traditional IPv4 or IPv6 protocols. Here’s what you need to do:

1. First, make sure that QUIC is enabled on both your client and server machines. You can check this by running `sysctl -a | grep net.ipv4.tcp_quic` on the command line. If it shows “net.ipv4.tcp_quic = 0”, then you need to enable it in your sysctl.conf file:

# This script enables QUIC on both the client and server machines by modifying the sysctl.conf file.

# First, we use the sudo command to run the following command as root user.
sudo echo 'net.ipv4.tcp_quic=1' >> /etc/sysctl.d/99-qipcrt.conf

# Next, we use the sysctl command to reload the sysctl.conf file and apply the changes.
sudo sysctl -p /etc/sysctl.d/99-qipcrt.conf

# The ">>" operator appends the output of the first command to the specified file, in this case, the sysctl.conf file.
# The "-p" flag in the sysctl command reloads the configuration from the specified file.
# The "net.ipv4.tcp_quic=1" line enables QUIC by setting its value to 1 in the sysctl.conf file.

2. Next, import the socket module and set your address family to af_qipcrt:

# Import the socket module
import socket

# Set the default timeout for connection attempts to 10 seconds
socket.setdefaulttimeout(10)

# Create a connection to the specified address and port
# Set the source address to your IP and the source port to 53
sock = socket.create_connection(('example.com', 80), source_address=('your-ip', 53))

# Enable the TCP_QUIC protocol for the socket
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_QUIC_ENABLED, 1)

# Bind the socket to any available IP address on your machine
# This allows the socket to listen for incoming connections on any interface
sock.bind((socket.gethostname(), 0))

# Connect to the specified address and port
# This is necessary to establish the connection
sock.connect(('example.com', 80))

3. That’s it! You can now use the sock object for reading and writing data just like you would with a regular socket connection.

Now, let me tell you why this is so awesome. First of all, QUIC provides faster and more reliable data transfer due to its congestion control algorithms and packet-level encryption. Secondly, it allows for multiplexing multiple connections over the same TCP port, which reduces overhead and improves resource utilization. And finally, it’s compatible with both IPv4 and IPv6 addresses, so you can use it regardless of your network configuration.

6.12 support for af_qipcrt address family! Give it a try and let us know how it works for you. And if you have any questions or suggestions, feel free to leave them in the comments below.

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