#!/usr/bin/env bash
# list-pve-vm-macs.sh
# List MAC addresses for all QEMU VMs on this PVE node.

set -Eeuo pipefail

# Header
printf '%-5s %-25s %-5s %-17s %-10s\n' "ID" "NAME" "IF" "MAC" "BRIDGE"
printf '%s\n' "---------------------------------------------------------------------"

# Alle VMIDs holen (erste Zeile ist Header)
qm list | awk 'NR>1 {print $1}' | while read -r vmid; do
    # Name aus der VM-Config holen
    name="$(qm config "$vmid" | awk -F': ' '/^name:/ {print $2; exit}')"
    [ -z "${name:-}" ] && name="<no-name>"

    # Netzwerkkarten aus der Config parsen
    qm config "$vmid" | awk -v vmid="$vmid" -v name="$name" '
        /^net[0-9]+:/ {
            # Beispiel:
            # net0: virtio=DE:AD:BE:EF:01:02,bridge=vmbr0,firewall=1
            net = $1
            sub(":", "", net)  # "net0:" -> "net0"

            line = $0
            sub(/^net[0-9]+:[[:space:]]*/, "", line)

            mac = ""
            bridge = ""

            # In Komma-getrennte Optionen splitten
            n = split(line, parts, ",")

            for (i = 1; i <= n; i++) {
                # führende Spaces entfernen
                gsub(/^[[:space:]]+/, "", parts[i])

                if (index(parts[i], "=") == 0)
                    continue

                split(parts[i], kv, "=")
                key = kv[1]
                val = kv[2]

                # MAC erkennen: 6x 2 Hex-Zeichen mit :
                if (val ~ /^[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]$/) {
                    mac = val
                } else if (key == "bridge") {
                    bridge = val
                }
            }

            printf "%-5s %-25s %-5s %-17s %-10s\n", vmid, name, net, mac, bridge
        }
    '
done