Add Raspberry Pi MAC address cloner scripts

[Copilot]

Implements the requested workflow: connect a device to the Pi over ethernet, capture its MAC via DHCP, then reconnect to the LAN impersonating that device's MAC address.

Scripts (mac-address-cloner/)

• 01-setup-dhcp-server.sh — assigns a static IP to the ethernet interface, saves the Pi's original MAC, and starts dnsmasq as a DHCP server so the target device gets an address automatically
• 02-capture-mac.sh — extracts the device MAC from the dnsmasq lease file; falls back to ARP table; persists to /var/lib/mac-address-cloner/captured_mac
• 03-clone-and-connect.sh — tears down dnsmasq, applies the captured MAC via ip link set … address, and requests a LAN DHCP lease
• 04-restore-mac.sh — releases the cloned-MAC lease and restores the Pi's hardware MAC

Workflow

sudo ./01-setup-dhcp-server.sh   # connect target device to Pi
sudo ./02-capture-mac.sh          # disconnect device; plug Pi into LAN
sudo ./03-clone-and-connect.sh    # Pi appears on LAN as the target device
sudo ./04-restore-mac.sh          # optional: restore Pi's real MAC

State (original MAC, captured MAC, interface) is persisted under /var/lib/mac-address-cloner/ so steps can run independently at different times. Requires dnsmasq; works with either dhclient or dhcpcd.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>mac address cloner</issue_title>
<issue_description>I want to do the following:

• connect a device to my raspberry pi via ethernet
• give the device an IP dhcp and remember the mac address
• disconnect the device and connect to LAN with the mac address of the device I previously had connected

can this be done with a bunch of scripts?</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes mac address cloner #7

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.