Create Network Manager connection from command line

addNetworkManagerConnection.py

import dbus, struct, socket, uuid

def _ip(ip):
        t = socket.inet_aton(ip)
        return dbus.UInt32(struct.unpack("I", t)[0])

def _ips(ips):
        return dbus.Array([_ip(ip) for ip in ips], signature=dbus.Signature('u'))

def _ip6(ip):
        return dbus.ByteArray(ip)

def _ip6s(ips):
        return dbus.Array([_ip6(ip) for ip in ips], signature=dbus.Signature('ay'))

s_wired = dbus.Dictionary({
        'mac': dbus.ByteArray('XX:XX:XX:XX:XX:XX')
})

s_con = dbus.Dictionary({
        'type': '802-3-ethernet',
        'uuid': str(uuid.uuid4()),
        'id': 'dhcp'
})

s_ip4 = dbus.Dictionary({
        'method': 'auto',
        'dns': _ips(['127.0.0.1']),
        'dns-search': ['example.org'],
        'ignore-auto-dns': True,
        'may-fail': True
})

s_ip6 = dbus.Dictionary({
        'method': 'auto',
        'dns': _ip6s(['::1']),
        'dns-search': ['example.org'],
        'ignore-auto-dns': True,
        'may-fail': True
})

con = dbus.Dictionary({
        '802-3-ethernet': s_wired,
        'connection': s_con,
        'ipv4': s_ip4,
        'ipv6': s_ip6
})


bus = dbus.SystemBus()
proxy = bus.get_object("org.freedesktop.NetworkManager", "/org/freedesktop/NetworkManager/Settings")
settings = dbus.Interface(proxy, "org.freedesktop.NetworkManager.Settings")
settings.AddConnection(con)