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temp_utils�util)�get_interface_mac�is_ib_interfacez/run/systemd/netif/leasesz/var/lib/dhclientz .+\.leases?$aN #!/bin/sh
log() {
echo "udhcpc[$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: $1" >&2
exit 1
;;
esac
c @ � e Zd ZdZdS )�NoDHCPLeaseErrorz'Raised when unable to get a DHCP lease.N��__name__�
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Current uses are DataSourceAzure and DataSourceEc2 during ephemeral
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Nr r r r r r E r r c @ r )�NoDHCPLeaseInterfaceErrorz7Raised when unable to find a viable interface for DHCP.Nr r r r r r M r r c @ r )� NoDHCPLeaseMissingDhclientErrorz$Raised when unable to find dhclient.Nr r r r r r Q r r �
dhcp_log_func�returnc C s2 |p| j }|du rt�d� t� �| j�||| �S )a! Perform dhcp discovery if nic valid and dhclient command exists.
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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: Callable accepting the interface and client's
stdout, stderr 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.)�fallback_interface�LOG�debugr � dhcp_client�dhcp_discovery)�distro�nicr � interfacer r r � maybe_perform_dhcp_discoveryU s
r( c C s t tjt| �dd��S )z�Parse a systemd lease file content as in /run/systemd/netif/leases/
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r �rJ r' r r r �get_newest_lease� s zDhcpClient.get_newest_lease�routesc C s g S )ap
parse classless static routes from string
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r )rb r r r �parse_static_routes� s
z DhcpClient.parse_static_routesNr c C r_ )a� Run dhcp client on the interface without scripts or filesystem
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r )rJ r' r r% r r r r$ � s zDhcpClient.dhcp_discovery�NN)r r r rG �timeoutrK � classmethodrQ rV �strr\ r^ �abc�abstractmethodr r ra � staticmethodr r
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e fdd��Zdefdd�Z� ZS )� IscDhclient�dhclientc � t � �� d| _d S )Nz/run/dhclient.lease��superrK �
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g S |�| �D ]:}g }|�d�D ]}|�� �dd��dd�}|r4|�|�dd�� qt|�}|� d�}|rGt
� |�|d< |�|� q|S ) z�parse the content of a lease file
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isc-dhclient lease
@return: a list of leases, most recent last
zlease {(?P<lease>.*?)}\n�;�"rC zoption � rM � unknown-245) �re�compile�DOTALL�findall�split�strip�replace�appendr* r< rk �get_ip_from_lease_value)rt � lease_regex� dhcp_leases�lease�
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� zIscDhclient.parse_leasesc C sx | � dd�}t|�dkr2d}|�d�D ]}t|�dkr d| }||7 }qt�dt|� dd�d��}n|�d �}t�|�S )
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z#IscDhclient.get_ip_from_lease_valuer' c C sr t t��+ t�| j�}|r | �|�}|r'|d W d � S W d � i S W d � i S 1 s2w Y i S )a� Get the most recent lease from the ephemeral phase as a dict.
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pairs from the most recent lease.
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that require a distro object
@raises: InvalidDHCPLeaseFileError on empty or unparsable leasefile
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��z IscDhclient.get_newest_leaseNr c
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� | �(|�}|�r2|S t)� �) a� Run dhclient on the interface without scripts/filesystem artifacts.
@param interface: Name of the network interface on which to send a
dhcp request
@param dhcp_log_func: Callable accepting the interface and client's
stdout, stderr streams.
@param distro: a distro object for network interface manipulation
@return: dict of lease options representing the most recent dhcp lease
parsed from the dhclient.lease file
�!Performing a dhcp discovery on %sz/run/dhclient.pidN�{�G�z�?� z20:%s�$ z0interface "%s" {send dhcp-client-identifier %s;}T�� needs_exez-dhclient.confz3dhclient exited with code: %s stderr: %r stdout: %r)�maxwait�naplenz+dhclient did not produce expected files: %sz, c s s � | ] }t j�|�V qd S rE )r0 r1 �basename)�.0�fr r r � <genexpr> s � z-IscDhclient.dhcp_discovery.<locals>.<genexpr>�unknownFrC �No PID file found at z, dhclient is still running�PID file contained [z ], dhclient is still runningrM z killing dhclient with pid=%szCdhclient(pid=%s, parentpid=%s) failed to daemonize after %s secondsg $@)*r! r" r� re r r� r0 rS rp �net_ops�link_upr r r
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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")
]
# unknown-121 option format
sr3 = parse_static_routes( "0:a:0:0:1:20:a8:3f:81:10:a:0:0:1:20:a9:fe:a9:fe:a:0:0:1")
sr3 = [
("0.0.0.0/0", "10.0.0.1"),
("168.63.129.16/32", "10.0.0.1"),
("169.254.169.254/32", "10.0.0.1"),
]
Python version of isc-dhclient's hooks:
/etc/dhcp/dhclient-exit-hooks.d/rfc3442-classless-routes
ru c S s g | ]}|r|�qS r r �r� �tokr r r �
<listcomp>� s z3IscDhclient.parse_static_routes.<locals>.<listcomp>z[, . :]r� c S s g | ] }t t|d ���qS )r� )rg r� r� r r r r� � s 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_error� s
��z5IscDhclient.parse_static_routes.<locals>._trunc_errorr � �! � N�.rM � � � r� r� � � � r� )r� r� r� z0.0.0.0zSParsed invalid net length "%s". Verify DHCP rfc3442-classless-static-routes value.z%s/%s) �rstripry r} � enumerater� r� r� r5 r! r� r� ) rb �tokens�
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��z IscDhclient.parse_static_routesc C s� d}| j | jfttffD ]C\}}|sq g }zt�|�}W n ty% Y q w d}|D ] }t�||�s3q*tj �
||�}tj � |�}||krH|}|}q*|rO| S q dS )z�Get the latest lease file from a distro-managed dhclient
Doesn't consider the ephemeral timeframe lease.
@param distro: used for distro-specific lease location and filename
@return: The most recent lease file, or None
Ng �) �dhclient_lease_directory�dhclient_lease_file_regex�DHCLIENT_FALLBACK_LEASE_DIR� DHCLIENT_FALLBACK_LEASE_REGEXr0 r3 r� ry �searchr1 r5 �getmtime) r% � latest_file� directory�regex� lease_files� latest_mtime�fname�abs_path�mtimer r r �!get_newest_lease_file_from_distro' s8 � � � ��z-IscDhclient.get_newest_lease_file_from_distro�keyc C sR | � |�}|r#t�|�}|r%t| �|��D ]}|�|�}|r"| S qdS dS dS )a8 Get a key from the latest lease from distro-managed dhclient
Doesn't consider the ephemeral timeframe lease.
@param lease_dir: distro-specific lease to check
@param lease_file_regex: distro-specific regex to match lease name
@return: The most recent lease file, or None
N)r� r r4 �reversedr� r< )rJ r% r� rp r- r� �serverr r r �get_key_from_latest_leaseS s
��z%IscDhclient.get_key_from_latest_leaserd )r r r rG rK rj rg r r r r� r� ra r r r$ r
rc r� r �
__classcell__r r rq r rk � s.
���
� w+rk c @ s� e Zd ZdZdZ ddedeeeeegdf deee f fdd�Z
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ededefdd��Zdedeee f fdd�Ze dedeeeef fdd��ZdS )�Dhcpcd�dhcpcdi, Nr' r r c
C s t �d|� d}t| j| �}g }|j�|� z�t|�r dg}| jdddddd g|�|�}tj|| jd
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� t|�d }~w tj �y } zt �d|j |j|j
� t|�d }~ww )a� Run dhcpcd on the interface without scripts/filesystem artifacts.
@param interface: Name of the network interface on which to send a
dhcp request
@param dhcp_log_func: Callable accepting the interface and client's
stdout, stderr streams.
@param distro: a distro object for network interface manipulation
@return: dict of lease options representing the most recent dhcp lease
parsed from the dhclient.lease file
r� r� z
--clientid�
--ipv4onlyz--waitipz --persistentz--noarpz--debugz--script=/bin/true)re Nz-PFrC z!killing dhcpcd with pid=%s gid=%sz9Process group id [%s] has already exited, nothing to killr� z, dhcpcd is still runningr� z], dhcpcd is still runningzNo lease foundz8dhcpcd timed out after %s seconds: stderr: %r stdout: %r�1dhcpcd exited with code: %s stderr: %r stdout: %r) r! r" r� re r� r� r rG r ra r� r~ r� r r4 �
get_proc_pgidr0 �killpgr� r� �ProcessLookupErrorr� r� r� r� r r r� r� r� )rJ r' r r% r� r� �infiniband_argument�commandr� r� r� r� r� �gidr� r� r� r� r r r r$ j s� �� �
�
�� � �
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��
�����zDhcpcd.dhcp_discoveryr@ �dhcp_option_numberc C s> d}dt dtfdd�}|| |�D ] \}}||kr | S qdS )aV get a specific option from a binary lease file
This is required until upstream dhcpcd supports unknown option 245
upstream bug: https://github.com/NetworkConfiguration/dhcpcd/issues/282
@param data: Binary lease data
@param number: Option number to return
@return: the option (bytes) or None
�� r@ �indexc s sl � t | �|d kr4| | }| d| }| d| d| | � }||fV d| | }t | �|d ks dS dS )z�options are variable length, and consist of the following format
option number: 1 byte
option length: 1 byte
option data: variable length (see length field)
r� rM N)r� )r@ r �code�length�optionr r r � iter_options� s �
�z>Dhcpcd.parse_unknown_options_from_packet.<locals>.iter_optionsN)�bytesr� )r@ r �INDEXr r r r r r �!parse_unknown_options_from_packet� s �z(Dhcpcd.parse_unknown_options_from_packet�
lease_dumpc
C s t �d|| � z$tdd� | �� �dd��d�D ��}|s*d}t �|| � t|| ��W n ty@ } z t �d| � t|�d }~ww ||d
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|�||< qWt � d|� d��}t
�|d�} | rt�| �|d< |S )a` parse the output of dhcpcd --dump
map names to the datastructure we create from dhclient
example dhcpcd output:
broadcast_address='192.168.15.255'
dhcp_lease_time='3600'
dhcp_message_type='5'
dhcp_server_identifier='192.168.0.1'
domain_name='us-east-2.compute.internal'
domain_name_servers='192.168.0.2'
host_name='ip-192-168-0-212'
interface_mtu='9001'
ip_address='192.168.0.212'
network_number='192.168.0.0'
routers='192.168.0.1'
subnet_cidr='20'
subnet_mask='255.255.240.0'
z)Parsing dhcpcd lease for interface %s: %rc S s" g | ]
}d |v r|j d dd��qS )�=rM )�maxsplit)r} )r� �ar r r r� + s
�z-Dhcpcd.parse_dhcpcd_lease.<locals>.<listcomp>�'rC �
z;No valid DHCP lease configuration found in dhcpcd lease: %rz Error parsing dhcpcd lease: %rNr' c S s i | ] \}}|� d d�|�qS )r� �-)r )r� r� �valuer r r �
<dictcomp>@ s z-Dhcpcd.parse_dhcpcd_lease.<locals>.<dictcomp>z
fixed-addressr� )z
ip-addresszclassless-static-routesz/var/lib/dhcpcd/z.lease� rx )r! r" r* r~ r r} r� r r� r; �popr �load_binary_filer r r� r� )
r r' r� r� r� �name_map�source� destination� dhcp_messager� r r r �parse_dhcpcd_lease sH ���� � �� ��
� zDhcpcd.parse_dhcpcd_leasec
C sX z| � t�| jdd|g�j|�W S tjy+ } zt�d|j|j|j� t |�d}~ww )z�Return a dict of dhcp options.
@param interface: which interface to dump the lease from
@raises: InvalidDHCPLeaseFileError on empty or unparsable leasefile
content.
z --dumpleaser r N)
r& r rG r� r� r! r" r� r� r )rJ r' r� r r r ra W s, ��� ���zDhcpcd.get_newest_leaserb c C sD | � � }|rdd� t|ddd� |ddd� �D �S t�d| � g S )a�
classless static routes as returned from dhcpcd --dumplease 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.
@param routes: string containing classless static routes
@returns: list of tuple(str, str) for all valid parsed routes until the
first parsing error.
e.g.:
sr=parse_static_routes(
"0.0.0.0/0 10.0.0.1 168.63.129.16/32 10.0.0.1"
)
sr=[
("0.0.0.0/0", "10.0.0.1"),
("169.63.129.16/32", "10.0.0.1"),
]
c S � g | ]}|�qS r r �r� �ir r r r� � � z.Dhcpcd.parse_static_routes.<locals>.<listcomp>Nr� rM z'Malformed classless static routes: [%s])r} �zipr! r� �rb r� r r r rc t s
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the udhcpc lease file.
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@param interface: an interface name - not used in this class, but
required for function signature compatibility with other classes
that require a distro object
@raises: InvalidDHCPLeaseFileError on empty or unparsable leasefile
content.
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