some stuff i wrote in python using scapy:

dhcp-discover-transaction.py

initiate DHCP discover, wait for offer, send request, wait for ack

dhcp-release.py

send DHCP release

ipv6-ra.py

script to send IPv6 RA packet with validlifetime and preferredlifetime set to zero

icmpdump.py

first time ever that i used threads
the tool i use to sniff defined interface, recognise ICMP echo request/response packets and print delta time between them
it also recognizes udp and arp packets
prints timestamp and VLAN tag

ministack.py

sniffs defined interface and responds to ARP who-has and ICMP echo requests
threaded

scapy-packets.txt

just some oneliners for packets i needed for testing purposes