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dS )�EphemeralIPv4Networka� Context manager which sets up temporary static network configuration.
No operations are performed if the provided interface already has the
specified configuration.
This can be verified with the connectivity_urls_data.
If unconnected, bring up the interface with valid ip, prefix and broadcast.
If router is provided setup a default route for that interface. Upon
context exit, clean up the interface leaving no configuration behind.
N�interface_addrs_before_dhcpc
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|�| ji �| _dS )a� Setup context manager and validate call signature.
@param interface: Name of the network interface to bring up.
@param ip: IP address to assign to the interface.
@param prefix_or_mask: Either netmask of the format X.X.X.X or an int
prefix.
@param broadcast: Broadcast address for the IPv4 network.
@param router: Optionally the default gateway IP.
@param static_routes: Optionally a list of static routes from DHCP
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�z EphemeralIPv4Network.__init__c
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This context manager handles the lifecycle of the network interface,
addresses, routes, etc
z File existszAddress already assignedN) �_bringup_devicer �str�stderrr �_bringup_static_routesr �_bringup_router�__exit__)r! r# r$ r$ r% � __enter__N s( ���� �z EphemeralIPv4Network.__enter__c C s | j D ]}|� qdS )z Teardown anything we set up.N)r )r! � excp_type�
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S )af Perform the ip commands to fully set up the device.
Dhcp clients behave differently in how they leave link state and ip
address assignment.
Attempt assigning address and setting up link if needed to be done.
Set cleanup_cmds to return the interface state to how it was prior
to execution of the dhcp client.
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�0$I r c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �EphemeralIPv6Networkz�Context manager which sets up a ipv6 link local address
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sufficient for link-local communication.
c C s" |s t d�|���|| _|| _dS )z�Setup context manager and validate call signature.
@param interface: Name of the network interface to bring up.
@param ip: IP address to assign to the interface.
@param prefix: IPv6 uses prefixes, not netmasks
zCannot init network on {0}N)r r r r )r! r r r$ r$ r% r& � s
z EphemeralIPv6Network.__init__c C s* t �| jd�dkr| jj�| j� dS dS )z�linux kernel does autoconfiguration even when autoconf=0
https://www.kernel.org/doc/html/latest/networking/ipv6.html
� operstater2 N)r � read_sys_netr r r@ rB �r! r$ r$ r% r- s �z EphemeralIPv6Network.__enter__c G s dS )z%No need to set the link to down stateNr$ �r! �_argsr$ r$ r% r, s z EphemeralIPv6Network.__exit__N)rW rX rY rZ r& r- r, r$ r$ r$ r% r\ � s
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dd� ZdS )�EphemeralDHCPv4N�connectivity_urls_datac C s6 || _ d | _d | _|| _|pg | _|| _t�� | _d S �N) �iface�_ephipv4�lease�
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zEphemeralDHCPv4.__init__c C s& t | j� }rt�d|� dS | �� S )zUSetup sandboxed dhcp context, unless connectivity_url can already be
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clean_network)r! r. r/ r0 r$ r$ r% r, 7 s zEphemeralDHCPv4.__exit__c C s$ d| _ | jr| j�ddd� dS dS )z@Exit _ephipv4 context to teardown of ip configuration performed.N)rg rf r, r_ r$ r$ r% rl ; s �z EphemeralDHCPv4.clean_networkc C s� | j r| j S t| j| j| j�| _ | j st� �t�d| j d | j d | j d � ddddg d�dd�}| �|�}|d sGt �
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@return: A dict representing dhcp options on the most recent lease
obtained from the dhclient discovery if run, otherwise an error
is raised.
@raises: NoDHCPLeaseError if no leases could be obtained.
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fixed-addressz subnet-maskzbroadcast-address)z rfc3442-classless-static-routeszclassless-static-routesr z unknown-121�routers)r r r" r r r r r" r r r )rg r r re rh r
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eee f fdd�Zdd� ZdS )�EphemeralIPNetworkah Combined ephemeral context manager for IPv4 and IPv6
Either ipv4 or ipv6 ephemeral network may fail to initialize, but if either
succeeds, then this context manager will not raise exception. This allows
either ipv4 or ipv6 ephemeral network to succeed, but requires that error
handling for networks unavailable be done within the context.
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Args:
distro: The distro object
interface: The interface to bring up
ipv6: Whether to bring up an ipv6 network
ipv4: Whether to bring up an ipv4 network
connectivity_urls_data: List of url data to use for connectivity
check before attempting to bring up ephemeral networks. If
connectivity can be established to any of the urls, then the
ephemeral network setup is skipped.
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Attempt to bring up an ephemeral network for the specified IP version.
Args:
ip_version (str): The IP version to bring up ("ipv4" or "ipv6").
Returns:
Tuple: A tuple containing:
- a boolean indicating whether an ephemeral network was
successfully obtained
- an optional exception if ephemeral network setup failed
or None if successful
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Perform a connectivity check to the provided URLs to determine if the
ephemeral network setup is necessary.
This function attempts to reach one of the provided URLs and returns the
URL that was successfully reached. If none of the URLs can be reached,
it returns None.
The timeout for the request is determined by the highest timeout value
provided in the connectivity URLs data. If no timeout is provided, a
default timeout of 5 seconds is used.
Args:
connectivity_urls_data: A list of dictionaries, each containing
the following keys:
- "url" (str): The URL to check connectivity for.
- "headers" (dict, optional): Headers to include in the request.
- "timeout" (int, optional): Timeout for the request in seconds.
Returns:
Optional[str]: The URL that was successfully reached, or None if no
connectivity was established.
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Helper function to get headers for a given URL from the connectivity
URLs data provided to _check_connectivity_to_imds.
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