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d� de j e�Z G dd� de j �Z!dS )a� Networked spam-signature detection server.
The server receives the request in the form of a RFC5321 message, and
responds with another RFC5321 message. Neither of these messages has a
body - all of the data is encapsulated in the headers.
The response headers will always include a "Code" header, which is a
HTTP-style response code, and a "Diag" header, which is a human-readable
message explaining the response code (typically this will be "OK").
Both the request and response headers always include a "PV" header, which
indicates the protocol version that is being used (in a major.minor format).
Both the requestion and response headers also always include a "Thread",
which uniquely identifies the request (this is a requirement of using UDP).
Responses to requests may arrive in any order, but the "Thread" header of
a response will always match the "Thread" header of the appropriate request.
Authenticated requests must also have "User", "Time" (timestamp), and "Sig"
(signature) headers.
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r> } z|jd tjkr.� W Y dd}~X qX qW dS )z*restart a system call interrupted by EINTRr N)�OSError�args�errnoZEINTR)�funcr �e� r � /usr/lib/python3.6/server.py� _eintr_retry/ s r c @ sB e Zd ZdZdZdZddd�Zdd� Zd d
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dS )�Serverz_The pyzord server. Handles incoming UDP connections in a single
thread and single process.i � Nc C s d|d krt jt_nt jt_tjd�| _tjd�| _|| _ t
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r� } z| jjd |� W Y d d }~X nX | j � | j � t j t j | j � t j t j!| j"� d S )
N�:r Zpyzordz pyzord-usageZhandles_one_stepFzListening on %s)Zbind_and_activatez%Unable to set IPV6_V6ONLY to false %s)#�socketZAF_INET6r
Zaddress_familyZAF_INET�loggingZ getLogger�log� usage_log�database�getattr�one_step� passwd_fn� access_fn�accounts�acl� load_config� forwarder�debug� SocketServer� UDPServer�__init__�RequestHandlerZ
setsockoptZ IPPROTO_IPV6Z IPV6_V6ONLY�AttributeError�errorZ server_bindZserver_activate�signal�SIGUSR1�reload_handler�SIGTERM�shutdown_handler)�self�addressr r r r r r r r r ? s0
zServer.__init__c C s( t jj| j�| _t jj| j| j�| _dS )z>Reads the configuration files and loads the accounts and ACLs.N)�pyzor�configZload_passwd_filer r Zload_access_filer r )r& r r r r a s zServer.load_configc O s& | j jd� tj| jd�}|j� dS )zsHandler for the SIGTERM signal. This should be used to kill the
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z SIGTERM received. Shutting down.)�targetN)r �info� threading�Thread�shutdown�start)r& r �kwargs�tr r r r% f s zServer.shutdown_handlerc O s& | j jd� tj| jd�}|j� dS )zgHandler for the SIGUSR1 signal. This should be used to reload
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z*SIGUSR1 received. Reloading configuration.)r* N)r r+ r, r- r r/ )r& r r0 r1 r r r r# n s zServer.reload_handlerc C s | j jd|dd� d S )Nz'Error while processing request from: %sT)�exc_info)r r )r& �request�client_addressr r r � handle_errorv s zServer.handle_error)N) �__name__�
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PreForkServerz�The same as Server, but prefork itself when starting the self, by
forking a number of child-processes.
The parent process will then wait for all his child process to complete.
� c C s" d| _ tj| ||||� || _dS )zvThe same as Server.__init__ but requires a list of databases
instead of a single database connection.
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r �_prefork)r& r' r r r Zpreforkr r r r � s zPreForkServer.__init__� �?c C s� g }xTt | j�D ]F}t| j�}tj� }|sL|� | _tj| |d� tjd� q|j |� qW || _
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D ]}t tj |d� qhW dS )z=Fork the current process and wait for all children to finish.)�
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serve_forever�_exit�appendr< r �waitpid)r& r? r< Zdummyr �pidr r r rD � s
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f D ]}tj|tj� q W | j dkr6tj| � dS )zpIf this is the parent process send the TERM signal to all children,
else call the super method.
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zPreForkServer.load_configN)r; )r> )r6 r7 r8 r9 r rD r. r r r r r r: { s
r: c @ s e Zd ZdZdS )�ThreadingServerz�A threaded version of the pyzord server. Each connection is served
in a new thread. This may not be suitable for all database types.N)r6 r7 r8 r9 r r r r rJ � s rJ c @ s* e Zd ZdZd dd�Zdd� Zdd� ZdS )
�BoundedThreadingServerz^Same as ThreadingServer but this also accepts a limited number of
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Nc C s& t j| |||||d� tj|�| _d S )N)r )rJ r r, Z Semaphore� semaphore)r& r' r r r Z max_threads�forwarding_serverr r r r � s z BoundedThreadingServer.__init__c C s | j j� tj| ||� d S )N)rL �acquirerJ �process_request)r& r3 r4 r r r rO � s
z&BoundedThreadingServer.process_requestc C s t j| ||� | jj� d S )N)rJ �process_request_threadrL �release)r& r3 r4 r r r rP � s z-BoundedThreadingServer.process_request_thread)N)r6 r7 r8 r9 r rO rP r r r r rK � s
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ProcessServerz�A multi-processing version of the pyzord server. Each connection is
served in a new process. This may not be suitable for all database types.
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dS )r z Handle a single pyzord request.c O s$ t jj� | _tjj| f|�|� d S )N)�email�messageZMessage�responser �DatagramRequestHandlerr )r& r r0 r r r r � s zRequestHandler.__init__c C s� d| j d< d| j d< dtj | j d< y| j� W �nB tk
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tj� � W Y d d }~X nX | j j jd| j j� � | jj| j j� jd�� d S )z7Handle a pyzord operation, cleanly handling any errors.Z200�CodeZOK�Diagz%s�PVi� zNot implemented: %sNi� zVersion Not Supported: %si� zBad request: %si� z!Unauthorized: Signature Error: %si� z
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z RequestHandler._really_handlec C s6 | j jjd||� | jjdd| � | jjd|� dS )z,Create an appropriate response for an error.z%s: %srY z%drZ N)re r r rW Zreplace_header)r& �coderV r r r r5 / s zRequestHandler.handle_errorc C s6 | j jjd|d � dtj | jd< dd | jd< dS )zkHandle the 'pong' command.
This command returns maxint for report counts and 0 whitelist.
zRequest pong for %sr z%d�CountzWL-CountN)re r r �sys�maxsizerW )r& rv r r r � handle_pong5 s zRequestHandler.handle_pongc C sn |d }y| j j| }W n tk
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This command returns diagnostic data about a digest (timestamps for
when the digest was first/last seen as spam/ham, and spam/ham
counts).
r z'Request for information about digest %sc S s | sdS t j| j� �S )zoConvert a datetime object to a POSIX timestamp.
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