ip.py 文件源码

def get_iface_from_addr(addr):
    """Work out on which interface the provided address is configured."""
    for iface in netifaces.interfaces():
        addresses = netifaces.ifaddresses(iface)
        for inet_type in addresses:
            for _addr in addresses[inet_type]:
                _addr = _addr['addr']
                # link local
                ll_key = re.compile("(.+)%.*")
                raw = re.match(ll_key, _addr)
                if raw:
                    _addr = raw.group(1)

                if _addr == addr:
                    log("Address '%s' is configured on iface '%s'" %
                        (addr, iface))
                    return iface

    msg = "Unable to infer net iface on which '%s' is configured" % (addr)
    raise Exception(msg)