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Editing: dhcp.cpython-36.pyc
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3 \�me9T � @ sl 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 dlmZmZmZmZmZ eje�ZdZ dZ G dd � d e �Z G d d � d e �Z G d d � d e �Z!G dd� de �Z"G dd� de �Z#dd� Z$d$dd�Z%dd� Z&d%dd�Z'd&dd�Z(G d d � d e j)�Z*G d d � d e*�Z+G d d!� d!�Z,G d"d#� d#e*�Z-dS )'� N)�StringIO)�Any�Dict�List)�subp� temp_utils�util)�find_fallback_nic�get_devicelist�get_ib_interface_hwaddr�get_interface_mac�is_ib_interfacez/run/systemd/netif/leasesaN #!/bin/sh log() { echo "udhcpc[$PPID]" "$interface: $2" } [ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1 case $1 in bound|renew) cat <<JSON > "$LEASE_FILE" { "interface": "$interface", "fixed-address": "$ip", "subnet-mask": "$subnet", "routers": "${router%% *}", "static_routes" : "${staticroutes}" } JSON ;; deconfig) log err "Not supported" exit 1 ;; leasefail | nak) log err "configuration failed: $1: $message" exit 1 ;; *) echo "$0: Unknown udhcpc command: $1" >&2 exit 1 ;; esac c @ s e Zd ZdZdS )�NoDHCPLeaseErrorz'Raised when unable to get a DHCP lease.N)�__name__� __module__� __qualname__�__doc__� r r �/usr/lib/python3.6/dhcp.pyr A s r c @ s e Zd ZdZdS )�InvalidDHCPLeaseFileErrorz�Raised when parsing an empty or invalid dhclient.lease file. Current uses are DataSourceAzure and DataSourceEc2 during ephemeral boot to scrape metadata. N)r r r r r r r r r E s r c @ s e Zd ZdZdS )�NoDHCPLeaseInterfaceErrorz7Raised when unable to find a viable interface for DHCP.N)r r r r r r r r r M s r c @ s e Zd ZdZdS )� NoDHCPLeaseMissingDhclientErrorz$Raised when unable to find dhclient.N)r r r r r r r r r Q s r c @ s e Zd ZdZdS )� NoDHCPLeaseMissingUdhcpcErrorz)Raised when unable to find udhcpc client.N)r r r r r r r r r U s r c C sZ xN| j D ]D}y|� }tjd|j� |S ttfk rJ tjd|j� Y qX qW t� �dS )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: %sN)Zdhcp_client_priority�LOG�debug� client_namer r �warning)�distro�clientZ dhcp_clientr r r �select_dhcp_clientY s r c C sZ |dkr(t � }|dkrDtjd� t� �n |t� krDtjd|� t� �t| �}|j||| �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 Znic� dhcp_log_funcr r r r � maybe_perform_dhcp_discoveryk 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)Z list_values)�dict� configobjZ ConfigObjr )Zcontentr r r �networkd_parse_lease� s r% c C sT | dkr t } i }tjj| �s |S x.tj| �D ] }ttjtjj| |���||< q,W |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�retZlfiler r r �networkd_load_leases� s r/ c C sF |d kr t }t|d�}x*t|j� �D ]\}}|j| �r$|| S q$W d S )N)r- )r& r/ �sorted�items�get)Zkeynamer- ZleasesZ_ifindex�datar r r � networkd_get_option_from_leases� s r4 c @ sL e Zd ZdZedd� �Zedd� �Zeed�dd��Zeed�d d ��Z d S ) � DhcpClient� c C s t j d| jgddgd� d S )NZpkillr � )�rcs)r r )�clsr r r �kill_dhcp_client� s zDhcpClient.kill_dhcp_clientc C s. | j � tjd�}x|D ]}tj|� qW d S )Nz/var/lib/dhcp/*)r: �globr' �remove)r9 �files�filer r r � clear_leases� s zDhcpClient.clear_leases)�dhcp_interfacec C s |j d| j|ddgd� d S )N�startr r7 )r8 )�manage_servicer )r9 r@ r r r r � start_service� s zDhcpClient.start_servicec C s |j d| jddgd� d S )N�stopr r7 )r8 )rB r )r9 r@ r r r r � stop_service� s zDhcpClient.stop_serviceN) r r r r � classmethodr: r? �strrC rE r r r r r5 � s r5 c @ st e Zd ZdZdd� Zeeeeee f d�dd��Z ddd �Z ed d � �Z ed d � �Z eddd��Zedd� �ZdS )� IscDhclient�dhclientc C s& t jd�| _| js"tjd� t� �d S )NrI 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 jdt j�}g }tj| �}t|�dkr6tdj| ���xh|j|�D ]Z}g }xB|j d�D ]4}|j � j dd�j dd�}|sxqV|j |j dd �� qVW |j t |�� qBW |s�td j| ���|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}�;�"r6 zoption � r7 z1Cannot parse dhcp lease file {0}. No leases found)�re�compile�DOTALLr r+ �lenr �format�findall�split�strip�replace�appendr# )rN Z lease_regexZ dhcp_leasesZ lease_contentZleaseZ lease_options�liner r r �parse_dhcp_lease_file� s& z!IscDhclient.parse_dhcp_lease_fileNc ! C s t jd|� d}d}d}tjt�� tj|� tj|� W dQ R X |jj|� t |�r�dt |�dd� }d||f }t j dd �} tj j| |d �}tj||� y"tj|j| j||||��\} } W nB tjk �r } z"t jd | j| j| j� t| �W Y dd} ~ X nX tj||gd d d�} | �r@t jddjdd� | D ��� g S d}d}x�tdd�D ]v}tj |�j � }y t |�}W n t k �r� Y n6X tj |�}|dk�r�t jd|� tj!|t"j#� d}P t$j%d � �qTW |�s�t j&d||d� |dk �r�|| | � | j'|�S )a� Run dhclient on the interface without scripts/filesystem artifacts. @param dhclient_cmd_path: Full path to the dhclient used. @param interface: Name of the network interface on which to dhclient. @param dhcp_log_func: A callable accepting the dhclient output and error streams. @return: A list of dicts of representing the dhcp leases parsed from the dhclient.lease file or empty list. z!Performing a dhcp discovery on %sz/run/dhclient.pidz/run/dhclient.leaseNz20:%s�$ z0interface "%s" {send dhcp-client-identifier %s;}T)� needs_exez-dhclient.confz3dhclient exited with code: %s stderr: %r stdout: %r� g{�G�z�?)ZmaxwaitZnaplenz+dhclient did not produce expected files: %sz, c s s | ]}t jj|�V qd S )N)r' r( �basename)�.0�fr r r � <genexpr>I s z-IscDhclient.dhcp_discovery.<locals>.<genexpr>�unknownFr i� r7 z killing dhclient with pid=%szCdhclient(pid=%s, parentpid=%s) failed to daemonize after %s secondsg $@)(r r � contextlib�suppress�FileNotFoundErrorr' r< �net_ops�link_upr r r �get_tmp_ancestorr( r, r � write_filer Zbuild_dhclient_cmdrK �ProcessExecutionError� exit_code�stderr�stdoutr Zwait_for_filesr �ranger+ rZ �int� ValueErrorZ get_proc_ppid�kill�signal�SIGKILL�timeZsleep�errorr^ )rL � interfacer! r Zpid_filerN Z config_file�dhcp_client_identifierZinterface_dhclient_content�tmp_dir�out�errry ZmissingZppidZ daemonized�_Z pid_content�pidr r r r � sz zIscDhclient.dhcp_discoveryc s � j d�� dd� tjd� �D �}g }� fdd�}d}�x�t|�D �]�\}}||k rTq@t|�}|tdd �kr�d }t||d � �|k r�|||t||d � �� |S d j||d |d � �} d j||d || � �} || }�n |tdd�k�rjd}t||d � �|k �r$|||t||d � �� |S d j||d |d � dg �} d j||d || � �} || }�n�|td d�k�r�d}t||d � �|k �r�|||t||d � �� |S d j||d |d � ddg �} d j||d || � �} || }�n|td d �k�r�d}t||d � �|k �r>|||t||d � �� |S d j||d |d � dddg �} d j||d || � �} || }nx|dk�r�d}t||d � �|k �r�|||t||d � �� |S d} d j||d || � �} || }ntj d|� |S |j d| |f | f� q@W |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 rP c S s g | ] }|r|�qS r r )rc �tokr r r � <listcomp>� s z3IscDhclient.parse_static_routes.<locals>.<listcomp>z[, .]c s d| ||� f }t j|� 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 ry )ZcidrZrequiredZremain�msg)�rfc3442r r � _trunc_error� s z5IscDhclient.parse_static_routes.<locals>._trunc_errorr � �! � N�.r7 ra � � � �0� � � � z0.0.0.0zSParsed invalid net length "%s". Verify DHCP rfc3442-classless-static-routes value.z%s/%s) �rstriprS rY � enumeraters rr rV r, r ry r\ ) r� �tokens� static_routesr� Z current_idx�idxr� Z net_lengthZreq_toksZ net_addressZgatewayr )r� r �parse_static_routesj sr ! " z IscDhclient.parse_static_routesc C sJ dddg} x:| D ]2}t jj|�rtt j|��dkrtjd|� |S qW d S )Nz/var/lib/dhclientz /var/lib/dhcpz/var/lib/NetworkManagerr zUsing %s lease directory)r' r( �existsrV r* r r )Zsupported_dirs�dr r r �get_dhclient_d� s zIscDhclient.get_dhclient_dc C s~ | d krt j� } | sd S tj| �}d}d }xN|D ]F}|jd�r@q0|jd�sLq0tjj| |�}tjj|�}||kr0|}|}q0W |S )Nr7 Z dhclient6�.lease�.leases���)r� r� ) rH r� r' r* � startswith�endswithr( r, �getmtime)Zlease_dZ lease_filesZ latest_mtimeZ latest_fileZfnameZabs_path�mtimer r r �get_latest_lease� s$ z IscDhclient.get_latest_leasec C sd t | d��P}xH|D ]@}d|kr|jd�jd�}t|�dkr|d }tjd|� |}qW W d Q R X |S )N�rzdhcp-server-identifierz ; rR r� zFound DHCP identifier %s)�openrZ rY rV r r )rN �fdr] ZwordsZdhcptokZlatest_addressr r r �!parse_dhcp_server_from_lease_file s z-IscDhclient.parse_dhcp_server_from_lease_file)NN)N)r r r r rM � staticmethodrG r r r r^ r r� r� r� r� r r r r rH � s $ r k rH c @ s e Zd ZdZdd� ZdS )�DhcpcdZdhcpcdc C s t d��d S )NzDhcpcd not yet implemented)r )rL r r r rM s zDhcpcd.__init__N)r r r r rM r r r r r� s r� c @ s" e Zd ZdZdd� Zddd�ZdS )�Udhcpc�udhcpcc C s& t jd�| _| js"tjd� t� �d S )Nr� z3Skip udhcpc configuration: No udhcpc command found.)r rJ � udhcpc_pathr r r )rL r r r rM s zUdhcpc.__init__Nc C s� t jd|� tjdd�}tjj||d �}tjt �� tj |� W dQ R X |j j |� tjj|d�}t j|td� | jdd d |d |d d ddg }t|�r�t|dd�}|jdd|jdd� g� y tj|d|idd�\} } W nB tjk �r } z"t jd| j| j| j� t| �W Y dd} ~ X nX |dk �r0|| | � t jt j |��} | d j � } | �r~dd� t | ddd� | d dd� �D �| d< | gS ) as Run udhcpc on the interface without scripts or filesystem artifacts. @param interface: Name of the network interface on which to run udhcpc. @param dhcp_log_func: A callable accepting the udhcpc output and error streams. @return: A list of dicts of representing the dhcp leases parsed from the udhcpc lease file. z!Performing a dhcp discovery on %sT)r` z .lease.jsonN� udhcpc_scripti� z-OZ staticroutesz-iz-sz-nz-qz-fz-v)Zethernet_formatz-xz0x3d:%s�:r6 Z LEASE_FILE)Z update_envZcapturez1udhcpc exited with code: %s stderr: %r stdout: %rr� c S s g | ]}|�qS r r )rc �ir r r r� k s z)Udhcpc.dhcp_discovery.<locals>.<listcomp>r� r7 ) r r r rl r' r( r, rg rh ri r< rj rk r rm � UDHCPC_SCRIPTr� r r �extendr[ r rn ro rp rq r Z load_jsonr+ rY �zip)rL rz r! r r| rN r� �cmdr{ r} r~ ry Z lease_jsonr� r r r r ! sR ,zUdhcpc.dhcp_discovery)NN)r r r r rM r r r r r r� s r� )NN)N)N).�abcrg r; Zloggingr' rS rv rx �ior Ztypingr r r r$ Z cloudinitr r r Z cloudinit.netr r r r r Z getLoggerr r r& r� � Exceptionr r r r r r r" r% r/ r4 �ABCr5 rH r� r� r r r r �<module> s> L
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