microps

Tiny TCP/IP protocol stack for lectures.

If you love the Go language, see here.

Features

Supports multiple raw access methods.

• TUN/TAP
• PF_PACKET (Linux)
• BPF (macOS)

Supports multiple link protocols.

• Ethernet
• SLIP

Other features.

• Supports multiple interfaces
• Supports IP forwarding
• Automatic IP configuration by DHCP client

Build

Build sample applications and test programs

$ make

with debug output

$ CFLAGS=-DDEBUG make

Sample applications

TCP Echo server (with dynamic address)

 $ sudo apps/tcp_echo eth0 00:00:de:ad:be:ef dhcp

UDP Echo server (with static address)

 $ sudo apps/tcp_echo eth0 static 172.16.100.2 255.255.255.0 172.16.100.1

Both application listen on port 7.

Test programs

test/raw_test

$ sudo test/raw_test eth0

test/ethernet_test

$ sudo test/ethernet_test eth0

test/slip_test

$ sudo test/slip_test /dev/ttyXXX

test/arp_test

$ sudo test/arp_test eth0 00:00:de:ad:be:ef 172.16.100.2

RAW devices

You can select a Link-Level RAW device.

• raw_socket
• raw_tap
• raw_bpf

It can change in the Makefile.

License

microps is under the MIT License: See LICENSE file.