netutils¶
Network-related utilities and helper functions.
- oslo_utils.netutils.escape_ipv6(address)¶
Escape an IP address in square brackets if IPv6
- Parameters
address (string) – address to optionaly escape
- Returns
string
New in version 3.29.0.
- oslo_utils.netutils.get_ipv6_addr_by_EUI64(prefix, mac)¶
Calculate IPv6 address using EUI-64 specification.
This method calculates the IPv6 address using the EUI-64 addressing scheme as explained in rfc2373.
- Parameters
prefix – IPv6 prefix.
mac – IEEE 802 48-bit MAC address.
- Returns
IPv6 address on success.
- Raises
ValueError, TypeError – For any invalid input.
New in version 1.4.
- oslo_utils.netutils.get_mac_addr_by_ipv6(ipv6, dialect=<class 'netaddr.strategy.eui48.mac_unix_expanded'>)¶
Extract MAC address from interface identifier based IPv6 address.
For example from link-local addresses (fe80::/10) generated from MAC.
- Parameters
ipv6 – An interface identifier (i.e. mostly MAC) based IPv6 address as a netaddr.IPAddress() object.
dialect – The netaddr dialect of the the object returned. Defaults to netaddr.mac_unix_expanded.
- Returns
A MAC address as a netaddr.EUI() object.
See also: * https://tools.ietf.org/html/rfc4291#appendix-A * https://tools.ietf.org/html/rfc4291#section-2.5.6
New in version 4.3.0.
- oslo_utils.netutils.get_my_ipv4()¶
Returns the actual ipv4 of the local machine.
This code figures out what source address would be used if some traffic were to be sent out to some well known address on the Internet. In this case, IP from RFC5737 is used, but the specific address does not matter much. No traffic is actually sent.
New in version 1.1.
Changed in version 1.2.1: Return
'127.0.0.1'if there is no default interface.
- oslo_utils.netutils.is_ipv6_enabled()¶
Check if IPv6 support is enabled on the platform.
This api will look into the proc entries of the platform to figure out the status of IPv6 support on the platform.
- Returns
True if the platform has IPv6 support, False otherwise.
New in version 1.4.
- oslo_utils.netutils.is_valid_cidr(address)¶
Verify that address represents a valid CIDR address.
- Parameters
address (string) – Value to verify
- Returns
bool
New in version 3.8.
- oslo_utils.netutils.is_valid_icmp_code(code)¶
Verify if ICMP code is valid.
- Parameters
code – ICMP code field can be valid integer or None
- Returns
bool
ICMP code field can be either None or valid integer having a value of 0 up to and including 255.
- oslo_utils.netutils.is_valid_icmp_type(type)¶
Verify if ICMP type is valid.
- Parameters
type – ICMP type field can only be a valid integer
- Returns
bool
ICMP type field can be valid integer having a value of 0 up to and including 255.
- oslo_utils.netutils.is_valid_ip(address)¶
Verify that address represents a valid IP address.
- Parameters
address (string) – Value to verify
- Returns
bool
New in version 1.1.
- oslo_utils.netutils.is_valid_ipv4(address, strict=None)¶
Verify that address represents a valid IPv4 address.
- Parameters
address (string) – Value to verify
strict – flag allowing users to restrict validation to IP addresses in presentation format (
a.b.c.d) as opposed to address format (a.b.c.d,a.b.c,a.b,a).
- Returns
bool
New in version 1.1.
Changed in version 4.8.0: Allow to restrict validation to IP addresses in presentation format (
a.b.c.d) as opposed to address format (a.b.c.d,a.b.c,a.b,a).
- oslo_utils.netutils.is_valid_ipv6(address)¶
Verify that address represents a valid IPv6 address.
- Parameters
address (string) – Value to verify
- Returns
bool
New in version 1.1.
- oslo_utils.netutils.is_valid_ipv6_cidr(address)¶
Verify that address represents a valid IPv6 CIDR address.
- Parameters
address (string) – address to verify
- Returns
true if address is valid, false otherwise
New in version 3.17.
- oslo_utils.netutils.is_valid_mac(address)¶
Verify the format of a MAC address.
Check if a MAC address is valid and contains six octets. Accepts colon-separated format only.
- Parameters
address – MAC address to be validated.
- Returns
True if valid. False if not.
New in version 3.17.
- oslo_utils.netutils.is_valid_port(port)¶
Verify that port represents a valid port number.
Port can be valid integer having a value of 0 up to and including 65535.
New in version 1.1.1.
- oslo_utils.netutils.parse_host_port(address, default_port=None)¶
Interpret a string as a host:port pair.
An IPv6 address MUST be escaped if accompanied by a port, because otherwise ambiguity ensues: 2001:db8:85a3::8a2e:370:7334 means both [2001:db8:85a3::8a2e:370:7334] and [2001:db8:85a3::8a2e:370]:7334.
>>> parse_host_port('server01:80') ('server01', 80) >>> parse_host_port('server01') ('server01', None) >>> parse_host_port('server01', default_port=1234) ('server01', 1234) >>> parse_host_port('[::1]:80') ('::1', 80) >>> parse_host_port('[::1]') ('::1', None) >>> parse_host_port('[::1]', default_port=1234) ('::1', 1234) >>> parse_host_port('2001:db8:85a3::8a2e:370:7334', default_port=1234) ('2001:db8:85a3::8a2e:370:7334', 1234) >>> parse_host_port(None) (None, None)
- oslo_utils.netutils.set_tcp_keepalive(sock, tcp_keepalive=True, tcp_keepidle=None, tcp_keepalive_interval=None, tcp_keepalive_count=None)¶
Set values for tcp keepalive parameters
This function configures tcp keepalive parameters if users wish to do so.
- Parameters
tcp_keepalive – Boolean, turn on or off tcp_keepalive. If users are not sure, this should be True, and default values will be used.
tcp_keepidle – time to wait before starting to send keepalive probes
tcp_keepalive_interval – time between successive probes, once the initial wait time is over
tcp_keepalive_count – number of probes to send before the connection is killed
