Show HN: I integrated my from-scratch TCP/IP stack into the xv6-riscv OS

Summary

This project integrates a TCP/IP protocol stack into the xv6-riscv operating system, enabling network capabilities. Key Components: TCP/IP Stack : A kernel-space port of microps, a user-mode TCP/IP stack that I am also developing. Network Driver : A virtio-net driver for network device emulation in QEMU. Socket API : A standard socket interface for network applications. Network Configuration: A simple ifconfig command for basic network settings. Quick Start 1. Build and Run Clone the repository and use the make qemu command. $ git clone https://github.com/pandax381/xv6-riscv-net $ cd xv6-riscv-net $ make qemu Note This command will build the project and launch QEMU. On the first run, it will also create a TAP network device named tap0 on your host machine and assign it the IP address 192.0.2.1/24 . This enables network communication between the xv6 guest and the host. 2. Network Configuration in xv6 Once xv6 has booted, use the ifconfig command to configure the net0 network interface. We'll assign it the IP address 192.0.2.2 , as the host is using 192.0.2.1 . $ ifconfig net0 192.0.2.2 netmask 255.255.255.0 After setting the IP address, run the ifconfig command again to verify that the network settings have been applied. $ ifconfig net0: flags= 93< UP | BROADCAST | RUNNING | NEEDARP > mtu 1500 ether 52:54:00:12:34:56 inet 192.0.2.2 netmask 255.255.255.0 broadcast 192.0.2.255 The setup is now complete. You can verify the communication by pinging the xv6 guest from a terminal on your host machine. $ ping 192.0.2.2 PING 192.0.2.2 (192.0.2.2) 56(84) bytes of data. 64 bytes from 192.0.2.2: icmp_seq=1 ttl=255 time=0.444 ms ... 3. Running the Sample Programs This project includes tcpecho and udpecho as sample user-level applications to demonstrate the network stack. Here is how to test the TCP echo server. In the xv6 shell, run the tcpecho command. It will start a server listening on port 7 . $ tcpecho Starting TCP Echo Server socket: success, soc=3 bind: success, self=0.0....