diff options
Diffstat (limited to 'mpm/python')
| -rw-r--r-- | mpm/python/usrp_mpm/net.py | 72 |
1 files changed, 39 insertions, 33 deletions
diff --git a/mpm/python/usrp_mpm/net.py b/mpm/python/usrp_mpm/net.py index b91e6d278..be2d3f754 100644 --- a/mpm/python/usrp_mpm/net.py +++ b/mpm/python/usrp_mpm/net.py @@ -30,19 +30,18 @@ def get_valid_interfaces(iface_list): subset that contains actually valid entries. Interfaces are checked for if they actually exist, and if so, if they're up. """ - ipr = IPRoute() valid_ifaces = [] - for iface in iface_list: - valid_iface_idx = ipr.link_lookup(ifname=iface) - if len(valid_iface_idx) == 0: - continue - valid_iface_idx = valid_iface_idx[0] - link_info = ipr.get_links(valid_iface_idx)[0] - if link_info.get_attr('IFLA_OPERSTATE') == 'UP' \ - and len(get_iface_addrs(link_info.get_attr('IFLA_ADDRESS'))): - assert link_info.get_attr('IFLA_IFNAME') == iface - valid_ifaces.append(iface) - ipr.close() + with IPRoute() as ipr: + for iface in iface_list: + valid_iface_idx = ipr.link_lookup(ifname=iface) + if len(valid_iface_idx) == 0: + continue + valid_iface_idx = valid_iface_idx[0] + link_info = ipr.get_links(valid_iface_idx)[0] + if link_info.get_attr('IFLA_OPERSTATE') == 'UP' \ + and len(get_iface_addrs(link_info.get_attr('IFLA_ADDRESS'))): + assert link_info.get_attr('IFLA_IFNAME') == iface + valid_ifaces.append(iface) return valid_ifaces @@ -56,11 +55,16 @@ def get_iface_info(ifname): All values are stored as strings. """ - ipr = IPRoute() try: - link_info = ipr.get_links(ipr.link_lookup(ifname=ifname))[0] + with IPRoute() as ipr: + links = ipr.link_lookup(ifname=ifname) + if len(links) == 0: + raise LookupError("No interfaces known with name `{}'!" + .format(ifname)) + link_info = ipr.get_links(links)[0] except IndexError: - raise LookupError("Could not identify interface `{}'".format(ifname)) + raise LookupError("Could not get links for interface `{}'" + .format(ifname)) mac_addr = link_info.get_attr('IFLA_ADDRESS') ip_addrs = get_iface_addrs(mac_addr) return { @@ -90,17 +94,17 @@ def get_iface_addrs(mac_addr): return ipv4 addresses for a given macaddress input format: "aa:bb:cc:dd:ee:ff" """ - ip2 = IPRoute() - # returns index - [link] = ip2.link_lookup(address=mac_addr) - # Only get v4 addresses - addresses = [addr.get_attrs('IFA_ADDRESS') - for addr in ip2.get_addr(family=socket.AF_INET) - if addr.get('index', None) == link] - # flatten possibly nested list - addresses = list(itertools.chain.from_iterable(addresses)) - ip2.close() - return addresses + with IPRoute() as ip2: + # returns index + [link] = ip2.link_lookup(address=mac_addr) + # Only get v4 addresses + addresses = [addr.get_attrs('IFA_ADDRESS') + for addr in ip2.get_addr(family=socket.AF_INET) + if addr.get('index', None) == link] + # flatten possibly nested list + addresses = list(itertools.chain.from_iterable(addresses)) + + return addresses def byte_to_mac(byte_str): @@ -115,10 +119,12 @@ def get_mac_addr(remote_addr): return MAC address of a remote host already discovered or None if no host entry was found """ - ip2 = IPRoute() - addrs = ip2.get_neighbours(dst=remote_addr) - if len(addrs) > 1: - get_logger('get_mac_addr').warning("More than one device with the same IP address found. Picking entry at random") - if not addrs: - return None - return addrs[0].get_attr('NDA_LLADDR') + with IPRoute() as ip2: + addrs = ip2.get_neighbours(dst=remote_addr) + if len(addrs) > 1: + get_logger('get_mac_addr').warning("More than one device with the " + "same IP address found. " + "Picking entry at random") + if not addrs: + return None + return addrs[0].get_attr('NDA_LLADDR') |