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zEphemeralDHCPv4.__init__c C s* | j r"t| j �r"tjd| j � dS | j� S )zUSetup sandboxed dhcp context, unless connectivity_url can already be
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zEphemeralDHCPv4.__enter__c C s | j � dS )z Teardown sandboxed dhcp context.N)�
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� || _| 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.
N� z#Received dhcp lease on %s for %s/%s� interfacez
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z,EphemeralDHCPv4.extract_dhcp_options_mappingc C s, x&|D ] }|j |�s| jj |�||< qW d S )N)r6 r )r Zinternal_mappingr8 r7 Zdifferent_namesr r r r5 � s
z&EphemeralDHCPv4.get_first_option_value)NNN)
r r r r �strr r r r" r! r r+ r5 r r r r r + s
3 r c C s� | dkr&t � } | dkr@tjd� g S n| t� kr@tjd| � g S tjd�}|s\tjd� g S tjdddd��}t|| ||�S Q R X dS ) 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.�dhclientz7Skip dhclient configuration: No dhclient command found.Tzcloud-init-dhcp-)Zrmtree_ignore_errors�prefixZ needs_exe) r r r r
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j| ���|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 � r# z1Cannot parse dhcp lease file {0}. No leases found)�re�compile�DOTALLr � load_file�lenr
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} P tjd� q�W | �srt jd || d!� |d k �r�||| � 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 inteface on which to dhclient.
@param cleandir: The directory from which to run dhclient as well as store
dhcp leases.
@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
dhcp.leases file or empty list.
z!Performing a dhcp discovery on %sr: z dhclient.pidz dhcp.leasesr% �link�setZdevZupT)Zcapturez-1z-vz-lfz-pfz-sfz /bin/true� g{�G�z�?)ZmaxwaitZnaplenz+dhclient did not produce expected files: %sz, c s s | ]}t jj|�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 secondsNg $@)r r rS rT �joinr �copy�access�X_OKr Zwait_for_filesZwarning�rangerD rI �int�
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r< c C s t tjt| �dd��S )z�Parse a systemd lease file content as in /run/systemd/netif/leases/
Parse this (almost) ini style file even though it says:
# This is private data. Do not parse.
Simply return a dictionary of key/values.F)Z list_values)rL � configobjZ ConfigObjr )Zcontentr r r �networkd_parse_lease< s rl c C sT | dkr t } i }tjj| �s |S x.tj| �D ] }ttjtjj| |���||< q,W |S )z�Return a dictionary of dictionaries representing each lease
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The top level key will be the filename, which is typically the ifindex.N) �NETWORKD_LEASES_DIRrS rT �isdir�listdirrl r rD rZ )�leases_d�retZlfiler r r �networkd_load_leasesG s rr c C sF |d kr t }t|d�}x*t|j� �D ]\}}|j| �r$|| S q$W d S )N)rp )rm rr �sortedr2 r6 )Zkeynamerp r. Z_ifindex�datar r r � networkd_get_option_from_leasesZ s
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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
r= c S s g | ] }|r|�qS r r )rV �tokr r r �
<listcomp> s z'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 re )ZcidrZrequiredZremain�msg)�rfc3442r r � _trunc_error� s z)parse_static_routes.<locals>._trunc_errorr � �! � N�.r# rR � � � �0� � � � z0.0.0.0zSParsed invalid net length "%s". Verify DHCP rfc3442-classless-static-routes value.z%s/%s) �rstriprA rH � enumerater_ r^ rE rZ r re rK ) ry �tokensr( rz Z current_idx�idxrv Z
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