diff options
Diffstat (limited to 'cloudinit/net/dhcp.py')
| -rw-r--r-- | cloudinit/net/dhcp.py | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/cloudinit/net/dhcp.py b/cloudinit/net/dhcp.py index 05350639..0cba7032 100644 --- a/cloudinit/net/dhcp.py +++ b/cloudinit/net/dhcp.py @@ -4,6 +4,7 @@ # # This file is part of cloud-init. See LICENSE file for license information. +import configobj import logging import os import re @@ -11,9 +12,12 @@ import re from cloudinit.net import find_fallback_nic, get_devicelist from cloudinit import temp_utils from cloudinit import util +from six import StringIO LOG = logging.getLogger(__name__) +NETWORKD_LEASES_DIR = '/run/systemd/netif/leases' + class InvalidDHCPLeaseFileError(Exception): """Raised when parsing an empty or invalid dhcp.leases file. @@ -118,4 +122,42 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir): return parse_dhcp_lease_file(lease_file) +def networkd_parse_lease(content): + """Parse a systemd lease file content as in /run/systemd/netif/leases/ + + Parse this (almost) ini style file even though it says: + # This is private data. Do not parse. + + Simply return a dictionary of key/values.""" + + return dict(configobj.ConfigObj(StringIO(content), list_values=False)) + + +def networkd_load_leases(leases_d=None): + """Return a dictionary of dictionaries representing each lease + found in lease_d.i + + The top level key will be the filename, which is typically the ifindex.""" + + if leases_d is None: + leases_d = NETWORKD_LEASES_DIR + + ret = {} + if not os.path.isdir(leases_d): + return ret + for lfile in os.listdir(leases_d): + ret[lfile] = networkd_parse_lease( + util.load_file(os.path.join(leases_d, lfile))) + return ret + + +def networkd_get_option_from_leases(keyname, leases_d=None): + if leases_d is None: + leases_d = NETWORKD_LEASES_DIR + leases = networkd_load_leases(leases_d=leases_d) + for ifindex, data in sorted(leases.items()): + if data.get(keyname): + return data[keyname] + return None + # vi: ts=4 expandtab |