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o o@�d�: � @ s� d Z ddlZddlZddlmZmZmZmZ ddlm Z ddl m Z ddl m Z mZmZ e�e�ZG dd� d�ZG dd � d �ZG d d � d �ZG d d � d �ZdS )z.Module for ephemeral network context managers � N)�Any�Dict�List�Optional)�subp)� IscDhclient�NoDHCPLeaseError� maybe_perform_dhcp_discoveryc @ sZ e Zd ZdZ ddeeeef fdd�Zdd� Z dd � Z d d � Z d d � Z dd� Z 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_url_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�connectivity_url_datac C s� t ||||g�std�||||���zt�|�| _W n ty. } ztd�|��|�d}~ww || _|| _|| _|| _ || _ || _ g | _ dS )aX 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 connectivity_url_data: Optionally, a URL to verify if a usable connection already exists. @param static_routes: Optionally a list of static routes from DHCP z5Cannot init network on {0} with {1}/{2} and bcast {3}z4Cannot setup network, invalid prefix or netmask: {0}N) �all� ValueError�format�net�ipv4_mask_to_net_prefix�prefixr � interface�ip� broadcast�router� static_routes� cleanup_cmds) �selfr r �prefix_or_maskr r r r �e� r �9/usr/lib/python3/dist-packages/cloudinit/net/ephemeral.py�__init__ s0 ������ z EphemeralIPv4Network.__init__c C s� | j rt�| j �rt�d| j d � dS z| �� | jr#| �� W dS | jr-| � � W dS W dS t j yD t� d� | � ddd� � w )z>Perform ephemeral network setup if interface is not connected.z=Skip ephemeral network setup, instance has connectivity to %s�urlNzHError bringing up EphemeralIPv4Network. Datasource setup cannot continue)r r �has_url_connectivity�LOG�debug�_bringup_devicer �_bringup_static_routesr �_bringup_routerr �ProcessExecutionError�error�__exit__�r r r r � __enter__L s* ����z EphemeralIPv4Network.__enter__c C s | j D ] }tj|dd� qdS )z Teardown anything we set up.T��captureN)r r )r � excp_type� excp_value�excp_traceback�cmdr r r r' r s �z EphemeralIPv4Network.__exit__c C s d� | j| j�}t�d| j|| j� ztjddddd|d| jd | jg d d d id � W n% tjyO } zdt |j �vr;� t�d| j| j� W Y d}~dS d}~ww tjdddddd | jdgd d� | j � dddddd | jdg� | j � ddddd|d | jg� dS )z1Perform the ip comands to fully setup the device.z{0}/{1}z:Attempting setup of ephemeral network on %s with %s brd %sr z-family�inet�addr�addr �devT�LANG�C)r+ � update_envz File existsz7Skip ephemeral network setup, %s already has address %sN�link�set�upr* �down�del) r r r r r! r r r r% �str�stderrr �append)r �cidrr r r r r" w s� �� ���� � � �� ��z$EphemeralIPv4Network._bringup_devicec C st | j D ]4\}}g }|dkrd|g}tjdddd|g| d| jg dd � | j�d dddd |g| d| jg � qd S ) Nz0.0.0.0�viar �-4�router> r3 Tr* r r; )r r r r �insert)r � net_address�gateway�via_argr r r r# � s* ��� ����z+EphemeralIPv4Network._bringup_static_routesc C s� t j g d�dd�\}}d|v rt�d| j|�� � dS t j ddd d | jd | jd | jg dd� | j�d ddd d| jd | jd | jg � t j ddd d dd| jd | jg dd� | j�d ddd ddd | jg� dS )z<Perform the ip commands to fully setup the router if needed.)r rB �showz 0.0.0.0/0Tr* �defaultz<Skip ephemeral route setup. %s already has default route: %sNr rA rB r2 r3 �srcr r; r@ ) r r r! r �stripr r r rC )r �out�_r r r r$ � sd �� ���� ��z$EphemeralIPv4Network._bringup_router�NNN)�__name__� __module__� __qualname__�__doc__r r r< r r r) r' r" r# r$ r r r r r s � �-&J r c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �EphemeralIPv6Networkz�Context manager which sets up a ipv6 link local address The linux kernel assigns link local addresses on link-up, which is 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 s z EphemeralIPv6Network.__init__c C s6 t �| jd�dkrtjdddd| jdgdd� d S d S ) z�linux kernel does autoconfiguration even when autoconf=0 https://www.kernel.org/doc/html/latest/networking/ipv6.html � operstater9 r r7 r8 r3 Fr* N)r � read_sys_netr r 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' 5 s z EphemeralIPv6Network.__exit__N)rN rO rP rQ r r) r' r r r r rR s rR c @ s^ e Zd Z ddeeeef fdd�Zdd� Zdd� Z d d � Z d d � Z d d� Z dd� Z dS )�EphemeralDHCPv4Nr c C s( || _ d | _d | _|| _|| _|| _d S �N)�iface�_ephipv4�lease� dhcp_log_funcr �distro)r r] rY r r\ r r r r : s zEphemeralDHCPv4.__init__c C s, | j rt�| j �rt�d| j � dS | �� S )zUSetup sandboxed dhcp context, unless connectivity_url can already be reached.z:Skip ephemeral DHCP setup, instance has connectivity to %sN)r r r r r! � obtain_leaser( r r r r) H s �zEphemeralDHCPv4.__enter__c C s | � � dS )z Teardown sandboxed dhcp context.N)� clean_network)r r, r- r. r r r r' U s zEphemeralDHCPv4.__exit__c C s* | j rd| _ | js dS | j�ddd� dS )z@Exit _ephipv4 context to teardown of ip configuration performed.N)r[ rZ r' r( r r r r_ Y s z EphemeralDHCPv4.clean_networkc C s� | j r| j S t| j| j| j�}|st� �|d | _ t�d| j d | j d | j d � ddddddgd d �}| �|�}|d sJt � |d |d �|d < |d rWt � |d �|d< | j r_| j |d< tdi |��}|�� || _| j S )a9 Perform dhcp discovery in a sandboxed environment if possible. @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. ���z#Received dhcp lease on %s for %s/%sr z fixed-addressz subnet-maskzbroadcast-addressz rfc3442-classless-static-routeszclassless-static-routes�routers)r r r r r r r r r r r Nr )r[ r r] rY r\ r r r! � extract_dhcp_options_mappingr �mask_and_ipv4_to_bcast_addrr �parse_static_routesr r r) rZ )r �leases�nmap�kwargs�ephipv4r r r r^ a sL � ��� �� z EphemeralDHCPv4.obtain_leasec C sD i }|� � D ]\}}t|t�r| �|||� q| j�|�||< q|S rX )�items� isinstance�list�get_first_option_valuer[ �get)r rf �result�internal_reference�lease_option_namesr r r rb � s �z,EphemeralDHCPv4.extract_dhcp_options_mappingc C s( |D ]}|� |�s| j� |�||< qd S rX )rm r[ )r �internal_mappingrp rn �different_namesr r r rl � s ��z&EphemeralDHCPv4.get_first_option_valuerM )rN rO rP r r r< r r r) r' r_ r^ rb rl r r r r rW 9 s � � 2 rW c @ s8 e Zd ZdZ d dedefdd�Zdd � Zd d � Zd S )�EphemeralIPNetworkz9Marries together IPv4 and IPv6 ephemeral context managersFT�ipv6�ipv4c C s, || _ || _|| _t�� | _d| _|| _d S )N� )r ru rt � contextlib� ExitStack�stack� state_msgr] )r r] r rt ru r r r r � s zEphemeralIPNetwork.__init__c C sz z | j r| j�t| j| j�� | jr | j�t| j�� W | S W | S ty< } z| jr/d| _ n|�W Y d }~| S d }~ww )Nzusing link-local ipv6) ru ry � enter_contextrW r] r rt rR r rz )r r r r r r) � s$ �� � ���z EphemeralIPNetwork.__enter__c G s | j �� d S rX )ry �closerU r r r r' � s zEphemeralIPNetwork.__exit__N)FT)rN rO rP rQ �boolr r) r' r r r r rs � s �� � rs )rQ rw �logging�typingr r r r � cloudinit.netr � cloudinitr �cloudinit.net.dhcpr r r � getLoggerrN r r rR rW rs r r r r �<module> s "m
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