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o o@�d�E � @ sD d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlZd dlm Z d dl m Z m Z m Z d dlZd dlmZmZmZ d dlmZmZmZmZ e�e�ZdZG dd� de �Z G d d � d e �Z G d d � d e �Z G d d� de �Z dd� Z!d dd�Z"dd� Z#d dd�Z$d dd�Z%G dd� de j&�Z'G dd � d e'�Z(G d d � d �Z)dS )!� N)�StringIO)�Any�Dict�List)�subp� temp_utils�util)�find_fallback_nic�get_devicelist�get_interface_mac�is_ib_interfacez/run/systemd/netif/leasesc @ � e Zd ZdZdS )�NoDHCPLeaseErrorz'Raised when unable to get a DHCP lease.N��__name__� __module__� __qualname__�__doc__� r r �4/usr/lib/python3/dist-packages/cloudinit/net/dhcp.pyr ! � r c @ r )�InvalidDHCPLeaseFileErrorz�Raised when parsing an empty or invalid dhclient.lease file. Current uses are DataSourceAzure and DataSourceEc2 during ephemeral boot to scrape metadata. Nr r r r r r % r r c @ r )�NoDHCPLeaseInterfaceErrorz7Raised when unable to find a viable interface for DHCP.Nr r r r r r - r r c @ r )� NoDHCPLeaseMissingDhclientErrorz$Raised when unable to find dhclient.Nr r r r r r 1 r r c C sP | j D ]!}z|� }t�d|j� |W S ty$ t�d|j� Y qw t� �)z�distros set priority list, select based on this order which to use If the priority dhcp client isn't found, fall back to lower in list. zDHCP client selected: %szDHCP client not found: %s)�dhcp_client_priority�LOG�debug� client_namer �warning)�distro�client� dhcp_clientr r r �select_dhcp_client5 s �r" c C sZ |du rt � }|du rt�d� t� �n|t� vr"t�d|� t� �t| �}|�||| �S )a Perform dhcp discovery if nic valid and dhclient command exists. If the nic is invalid or undiscoverable or dhclient command is not found, skip dhcp_discovery and return an empty dict. @param nic: Name of the network interface we want to run dhclient on. @param dhcp_log_func: A callable accepting the dhclient output and error streams. @return: A list of dicts representing dhcp options for each lease obtained from the dhclient discovery if run, otherwise an empty list is returned. Nz1Skip dhcp_discovery: Unable to find fallback nic.z8Skip dhcp_discovery: nic %s not found in get_devicelist.)r r r r r r" �dhcp_discovery)r �nic� dhcp_log_funcr r r r � maybe_perform_dhcp_discoveryD s � �r& c C s t tjt| �dd��S )z�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.F)� list_values)�dict� configobj� ConfigObjr )�contentr r r �networkd_parse_lease_ s r, c C sP | du rt } i }tj�| �s|S t�| �D ]}tt�tj�| |���||< q|S )z�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.N) �NETWORKD_LEASES_DIR�os�path�isdir�listdirr, r � load_file�join)�leases_d�ret�lfiler r r �networkd_load_leasesj s �r7 c C sF |d u rt }t|d�}t|�� �D ]\}}|�| �r || S qd S )N)r4 )r- r7 �sorted�items�get)�keynamer4 �leases�_ifindex�datar r r � networkd_get_option_from_leases} s �r? c @ sL e Zd ZdZedd� �Zedd� �Zedefdd��Zedefd d ��Z d S ) � DhcpClient� c C s t j d| jgddgd� d S )N�pkillr � ��rcs)r r )�clsr r r �kill_dhcp_client� s zDhcpClient.kill_dhcp_clientc C s* | � � t�d�}|D ]}t�|� q d S )Nz/var/lib/dhcp/*)rG �globr. �remove)rF �files�filer r r � clear_leases� s �zDhcpClient.clear_leases�dhcp_interfacec C s |j d| j|ddgd� d S )N�startr rC rD ��manage_servicer �rF rM r r r r � start_service� s �zDhcpClient.start_servicec C s |j d| jddgd� d S )N�stopr rC rD rO rQ r r r � stop_service� s zDhcpClient.stop_serviceN) r r r r � classmethodrG rL �strrR rT r r r r r@ � s r@ c @ sz e Zd ZdZdd� Zededeeee f fdd��Z dd d �Z ed d � �Z ed d� �Z eddd��Zedd� �ZdS )� IscDhclient�dhclientc C s& t �d�| _| jst�d� t� �d S )NrX z7Skip dhclient configuration: No dhclient command found.)r �which� dhclient_pathr r r ��selfr r r �__init__� s ��zIscDhclient.__init__� lease_file�returnc C s� t �dt j�}g }t�| �}t|�dkrtd�| ���|�|�D ]+}g }|� d�D ]}|� � � dd�� dd�}|s:q)|� |� dd �� q)|� t |�� q |sUtd �| ���|S ) a7 Parse the given dhcp lease file returning all leases as dicts. Return a list of dicts of dhcp options. Each dict contains key value pairs a specific lease in order from oldest to newest. @raises: InvalidDHCPLeaseFileError on empty of unparseable leasefile content. zlease {(?P<lease>.*?)}\nr z&Cannot parse empty dhcp lease file {0}�;�"rA zoption � rC z1Cannot parse dhcp lease file {0}. No leases found)�re�compile�DOTALLr r2 �lenr �format�findall�split�strip�replace�appendr( )r^ � lease_regex� dhcp_leases� lease_content�lease� lease_options�liner r r �parse_dhcp_lease_file� s, ���z!IscDhclient.parse_dhcp_lease_fileNc C s* t �d|� d}d}t�t�� t�|� t�|� W d � n1 s$w Y tjdddd|d gd d � | jd d d|d||ddg }t |�rvdt |�dd� }d||f }t j d d�} tj �| |d �} t�| |� |�d� |�| � z tj|d d �\} } W n tjy� } zt �d| j| j| j� t| �d} ~ ww tj||gddd�}|r�t �d d �d d � |D ��� g S d }d!}td"d#�D ]8}t�|��� }zt |�}W n t y� Y nw t� |�}|d$kr�t �d%|� t� |t j!� d } nt"�#d� q�|�st �$d&||d'� |du�r|| | � | �%|�S )(a� Run dhclient on the interface without scripts/filesystem artifacts. @param dhclient_cmd_path: Full path to the dhclient used. @param interface: Name of the network interface on which to dhclient. @param dhcp_log_func: A callable accepting the dhclient output and error streams. @return: A list of dicts of representing the dhcp leases parsed from the dhclient.lease file or empty list. z!Performing a dhcp discovery on %sz/run/dhclient.pidz/run/dhclient.leaseN�ip�link�set�dev�upT)�capturez-1z-vz-lfz-pfz-sfz /bin/truez20:%s�$ z0interface "%s" {send dhcp-client-identifier %s;})� needs_exez-dhclient.confz-cfz3dhclient exited with code: %s stderr: %r stdout: %r� g{�G�z�?)�maxwait�naplenz+dhclient did not produce expected files: %sz, c s s � | ] }t j�|�V qd S �N)r. r/ �basename)�.0�fr r r � <genexpr>' s � z-IscDhclient.dhcp_discovery.<locals>.<genexpr>�unknownFr i� rC z killing dhclient with pid=%szCdhclient(pid=%s, parentpid=%s) failed to daemonize after %s secondsg $@)&r r � contextlib�suppress�FileNotFoundErrorr. rI r rZ r r r �get_tmp_ancestorr/ r3 r � write_filerl �ProcessExecutionError� exit_code�stderr�stdoutr �wait_for_filesr �ranger2 rj �int� ValueError� get_proc_ppid�kill�signal�SIGKILL�time�sleep�errorrs )r\ � interfacer% r �pid_filer^ �cmd�dhcp_client_identifier�interface_dhclient_content�tmp_dir� file_name�out�errr� �missing�ppid� daemonized�_� pid_content�pidr r r r# � s� �� ��� ��� �� � � zIscDhclient.dhcp_discoveryc s � � d�� dd� t�d� �D �}g }� fdd�}d}t|�D �]n\}}||k r(q t|�}|tdd �v rod }t||d � �|k rO|||t||d � �� | S d �||d |d � �} d �||d || � �} || }�n|tdd�v r�d}t||d � �|k r�|||t||d � �� | S d �||d |d � dg �} d �||d || � �} || }n�|td d�v r�d}t||d � �|k r�|||t||d � �� | S d �||d |d � ddg �} d �||d || � �} || }n�|td d �v �rBd}t||d � �|k �r |||t||d � �� | S d �||d |d � g d� �} d �||d || � �} || }n@|dk�rxd}t||d � �|k �rd|||t||d � �� | S d} d �||d || � �} || }n t� d|� | S |� d| |f | f� q |S )a parse rfc3442 format and return a list containing tuple of strings. The tuple is composed of the network_address (including net length) and gateway for a parsed static route. It can parse two formats of rfc3442, one from dhcpcd and one from dhclient (isc). @param rfc3442: string in rfc3442 format (isc or dhcpd) @returns: list of tuple(str, str) for all valid parsed routes until the first parsing error. e.g.: sr=parse_static_routes( "32,169,254,169,254,130,56,248,255,0,130,56,240,1") sr=[ ("169.254.169.254/32", "130.56.248.255"), ("0.0.0.0/0", "130.56.240.1") ] sr2 = parse_static_routes( "24.191.168.128 192.168.128.1,0 192.168.128.1") sr2 = [ ("191.168.128.0/24", "192.168.128.1"), ("0.0.0.0/0", "192.168.128.1") ] Python version of isc-dhclient's hooks: /etc/dhcp/dhclient-exit-hooks.d/rfc3442-classless-routes r` c S s g | ]}|r|�qS r r )r� �tokr r r � <listcomp>j s z3IscDhclient.parse_static_routes.<locals>.<listcomp>z[, .]c s d| ||� f }t �|� d S )Nz�RFC3442 string malformed. Current route has CIDR of %s and requires %s significant octets, but only %s remain. Verify DHCP rfc3442-classless-static-routes value: %s)r r� )�cidr�required�remain�msg��rfc3442r r � _trunc_errorm s ��z5IscDhclient.parse_static_routes.<locals>._trunc_errorr � �! � N�.rC r| � � � �0� � � � )r� r� r� z0.0.0.0zSParsed invalid net length "%s". Verify DHCP rfc3442-classless-static-routes value.z%s/%s) �rstriprc ri � enumerater� r� rf r3 r r� rl ) r� �tokens� static_routesr� � current_idx�idxr� � net_length�req_toks� net_address�gatewayr r� r �parse_static_routesH sx ! " � ��z IscDhclient.parse_static_routesc C sH g d�} | D ]}t j�|�r!tt �|��dkr!t�d|� | S qd S )N)z/var/lib/dhclientz /var/lib/dhcpz/var/lib/NetworkManagerr zUsing %s lease directory)r. r/ �existsrf r1 r r )�supported_dirs�dr r r �get_dhclient_d� s �zIscDhclient.get_dhclient_dc C s� | d u rt �� } | s d S t�| �}d}d }|D ](}|�d�r q|�d�s*|�d�s*qtj�| |�}tj�|�}||kr?|}|}q|S )N���� dhclient6z.leasez.leases) rW r� r. r1 � startswith�endswithr/ r3 �getmtime)�lease_d� lease_files� latest_mtime� latest_file�fname�abs_path�mtimer r r �get_latest_lease� s& �z IscDhclient.get_latest_leasec C sv t | d��,}|D ] }d|v r(|�d��d�}t|�dkr(|d }t�d|� |}qW d � |S 1 s4w Y |S )N�rzdhcp-server-identifierz ; rb r� zFound DHCP identifier %s)�openrj ri rf r r )r^ �fdrr �words�dhcptok�latest_addressr r r �!parse_dhcp_server_from_lease_file� s �� ��z-IscDhclient.parse_dhcp_server_from_lease_file�NNr )r r r r r] � staticmethodrV r r r rs r# r� r� r� r� r r r r rW � s $ �{ j rW c @ s e Zd ZdZdd� ZdS )�Dhcpcd�dhcpcdc C s t d��)NzDhcpcd not yet implemented)r r[ r r r r] � s zDhcpcd.__init__N)r r r r r] r r r r r� � s r� r� r )*�abcr� rH �loggingr. rc r� r� �ior �typingr r r r) � cloudinitr r r � cloudinit.netr r r r � getLoggerr r r- � Exceptionr r r r r" r& r, r7 r? �ABCr@ rW r� r r r r �<module> s: Q
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