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o �Adp. � @ s� d dl Z d dlZd dlZd dlZd dlZd dlZd dlmZ d dlZd dl m Z m Z d dl m Z mZ e�e�ZdZG dd� de�ZG dd � d e�ZG d d � d e�ZG d d � d e�Zd dd�Zdd� Zd dd�Zdd� Zd dd�Z d dd�Z dd� Z dS ) � N)�StringIO)�subp�util)�find_fallback_nic�get_devicelistz/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$Raised when unable to find dhclient.Nr r r r r r ) r r c C sn | du rt � } | du rt�d� t� �n| t� vr"t�d| � t� �t�d�}|s1t�d� t� �t|| |�S )aJ Perform dhcp discovery if nic valid and dhclient command exists. If the nic is invalid or undiscoverable or dhclient command is not found, skip dhcp_discovery and return an empty dict. @param nic: Name of the network interface we want to run dhclient on. @param dhcp_log_func: A callable accepting the dhclient output and error streams. @param tmp_dir: Tmp dir with exec permissions. @return: A list of dicts representing dhcp options for each lease obtained from the dhclient discovery if run, otherwise an empty list is returned. Nz1Skip dhcp_discovery: Unable to find fallback nic.z8Skip dhcp_discovery: nic %s not found in get_devicelist.�dhclientz7Skip dhclient configuration: No dhclient command found.) r �LOG�debugr r r �whichr �dhcp_discovery)�nic� dhcp_log_func�tmp_dir� dhclient_pathr r r � maybe_perform_dhcp_discovery- s � � r c C s� t �dt j�}g }t�| �}t|�dkrtd�| ���|�|�D ]+}g }|� d�D ]}|� � � dd�� dd�}|s:q)|� |� dd �� q)|� t |�� q |sUtd �| ���|S ) a Parse the given dhcp lease file for the most recent lease. Return a list of dicts of dhcp options. Each dict contains key value pairs a specific lease in order from oldest to newest. @raises: InvalidDHCPLeaseFileError on empty of unparseable leasefile content. zlease {(?P<lease>.*?)}\nr z&Cannot parse empty dhcp lease file {0}�;�"� zoption � � z1Cannot parse dhcp lease file {0}. No leases found)�re�compile�DOTALLr � load_file�lenr �format�findall�split�strip�replace�append�dict)� lease_file� lease_regex� dhcp_leases� lease_content�lease� lease_options�liner r r �parse_dhcp_lease_fileL s, ���r6 c C s� t �d|� d}d}t�t�� t�|� t�|� W d � n1 s$w Y tjdddd|d gd d � | d d d|d||ddg }tj|d d �\}}tj ||gddd�}|rgt � dd� dd� |D ��� g S d} d} t dd �D ]8} t� |��� } zt| �} W n ty� Y nw t�| �} | d kr�t �d | � t�| tj� d } nt�d� qp| s�t �d | | d � |dur�|||� t|�S )!a� Run dhclient on the interface without scripts or 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/true� g{�G�z�?)�maxwait�naplenz+dhclient did not produce expected files: %sz, c s s � | ] }t j�|�V qd S �N)�os�path�basename)�.0�fr r r � <genexpr>� s � z!dhcp_discovery.<locals>.<genexpr>�unknownFr i� r" z killing dhclient with pid=%szCdhclient(pid=%s, parentpid=%s) failed to daemonize after %s secondsg $@)r r � contextlib�suppress�FileNotFoundErrorrA �remover r �wait_for_files�warning�join�ranger& r+ �int� ValueError� get_proc_ppid�kill�signal�SIGKILL�time�sleep�errorr6 )�dhclient_cmd_path� interfacer �pid_filer/ �cmd�out�err�missing�ppid� daemonized�_� pid_content�pidr r r r n sn �� �� � � 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)r. � configobj� ConfigObjr )�contentr r r �networkd_parse_lease� s ri 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_DIRrA rB �isdir�listdirri r r& rN )�leases_d�ret�lfiler r r �networkd_load_leases� s �rp c C sF |d u rt }t|d�}t|�� �D ]\}}|�| �r || S qd S )N)rm )rj rp �sorted�items�get)�keynamerm �leases�_ifindex�datar r r � networkd_get_option_from_leases� s �rx c 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 )rD �tokr r r � <listcomp> s z'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 rX )�cidr�required�remain�msg��rfc3442r r � _trunc_error s ��z)parse_static_routes.<locals>._trunc_errorr � �! � N�.r" r= � � � �0� � � � )r� r� r� z0.0.0.0zSParsed invalid net length "%s". Verify DHCP rfc3442-classless-static-routes value.z%s/%s) �rstripr# r* � enumeraterP rO r' rN r rX r- ) r� �tokens� static_routesr� � current_idx�idxry � net_length�req_toks� net_address�gatewayr r r �parse_static_routes� sp " " �r� )NNNr@ ) rH �loggingrA r# rT rV �ior rf � cloudinitr r � cloudinit.netr r � getLoggerr r rj � Exceptionr r r r r r6 r ri rp rx r� r r r r �<module> s. "[
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