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a ]�h�) � @ s� d Z ddlZddlZddlZddlZddlZddlZddlZddlZddl Z ddl m Z ddl m Z zeZW n ey� ejZY n0 ddiddiddid d d �dd idd id d d �ddiddidd idd id� Ze�e jdd� i ��e jd�ZdZdZdZdZdZdZg a da dd� Z d5dd�Z d6d d �Z efd d �Z!efd d!�Z"d"efd#d$�Z#d7d%d&�Z$d8d'd(�Z%d9d)d*�Z&d:d+d,�Z'ej(dfd-d.�Z)d;d/d0�Z*d<d1d2�Z+d=d3d4�Z,dS )>a� Basic network namespace management ================================== Pyroute2 provides basic namespaces management support. Here's a quick overview of typical netns tasks and related pyroute2 tools. Move an interface to a namespace -------------------------------- Though this task is managed not via `netns` module, it should be mentioned here as well. To move an interface to a netns, one should provide IFLA_NET_NS_FD nla in a set link RTNL request. The nla is an open FD number, that refers to already created netns. The pyroute2 library provides also a possibility to specify not a FD number, but a netns name as a string. In that case the library will try to lookup the corresponding netns in the standard location. Create veth and move the peer to a netns with IPRoute:: from pyroute2 import IPRoute ipr = IPRoute() ipr.link('add', ifname='v0p0', kind='veth', peer='v0p1') idx = ipr.link_lookup(ifname='v0p1')[0] ipr.link('set', index=idx, net_ns_fd='netns_name') Create veth and move the peer to a netns with IPDB:: from pyroute2 import IPDB ipdb = IPDB() ipdb.create(ifname='v0p0', kind='veth', peer='v0p1').commit() with ipdb.interfaces.v0p1 as i: i.net_ns_fd = 'netns_name' Manage interfaces within a netns -------------------------------- This task can be done with `NetNS` objects. A `NetNS` object spawns a child and runs it within a netns, providing the same API as `IPRoute` does:: from pyroute2 import NetNS ns = NetNS('netns_name') # do some stuff within the netns ns.close() One can even start `IPDB` on the top of `NetNS`:: from pyroute2 import NetNS from pyroute2 import IPDB ns = NetNS('netns_name') ipdb = IPDB(nl=ns) # do some stuff within the netns ipdb.release() ns.close() Spawn a process within a netns ------------------------------ For that purpose one can use `NSPopen` API. It works just as normal `Popen`, but starts a process within a netns. List, set, create, attach and remove netns ------------------------------------------ These functions are described below. To use them, import `netns` module:: from pyroute2 import netns netns.listnetns() Please be aware, that in order to run system calls the library uses `ctypes` module. It can fail on platforms where SELinux is enforced. If the Python interpreter, loading this module, dumps the core, one can check the SELinux state with `getenforce` command. � N)�config)� basestring�64biti4 �32bitiZ i� i� )r r i iw i^ iS ) Zx86_�i386�i686�mipsZloonZarmvZaarcZppc6Zs390� loongarch64Zrisc� i @� i i @ i z/var/run/netnsc C s8 | }t j�| �}|s dt| f }t|d�r4|�d�}|S )Nz%s/%s�encode�ascii)�os�path�dirname� NETNS_RUN_DIR�hasattrr )�name� netnspathr � r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/pyroute2/netns/__init__.py�_get_netnspath� s r c C s. | d ur | S t d u r*tjtj�d�dd�a t S )N�cT)Z use_errno)�__libc�ctypes�CDLL�utilZ find_library��libcr r r � _get_libc� s r c C s6 | r | }nt }z t�|�W S ty0 g Y S 0 dS )z, List available network namespaces. N)r r �listdir�FileNotFoundError)�nspathZnsdirr r r � listnetns� s r# c C sp i }t | d�D ]\}tj�| |�}zt�|�}W n tyD Y qY n0 |j|vrZi ||j< |||j |j< q|S )zI Return a dict with inode as key and namespace name as value )r" )r# r r �join�statr! �st_dev�st_ino)r" �ns_by_dev_inode�ns_nameZns_path�str r r �_get_ns_by_inode� s r+ c C s� i }t | �}t�d�D ]�}|�� s$qz t�tj�d|dd��}W nD ty� } z,|jtj tj fv rnW Y d}~q� W Y d}~n d}~0 0 z||j |j }W n t y� Y qY n0 ||vr�g ||< || �t|�� q|S )zU List pids in all netns If a pid is in a unknown netns do not return it �/proc�ns�netN)r+ r r �isdigitr% r r$ �OSError�errno�EACCES�ENOENTr& r' �KeyError�append�int)r" �resultr( �pidr* �er) r r r �ns_pids� s& r: � c C s� z6t �t j�dt| �dd��}t|�}||j |j W S ty| } z.|j t j t j fv rfW Y d}~dS � W Y d}~n d}~0 t y� Y dS 0 dS )zK Return netns name which matches the given pid, None otherwise r, r- r. N) r r% r r$ �strr+ r& r' r0 r1 r2 r3 r4 )r8 r" r* r( r9 r r r � pid_to_ns� s r= c C sH t |�}t| �}tj�|�}zt�|� W n2 ty\ } z|jtjkrH� W Y d }~n d }~0 0 d}|� d|dt t B d �dkr�|r�tt � � d| ��|� ||dtt B d �dkr�tt � � d| ��d}qbt�t�|tjtjB tjB d�� |d u �rd}|�t�dk �rtt � � d | ��|� d �|��d �|dtd �dk �rDtt � � d | ��d S ) NF� s noner zshare rundir failedzmount rundir failedT�selfzunshare failedz/proc/{}/ns/netzutf-8z mount failed)r r r r r �mkdirr0 r1 �EEXIST�mount� MS_SHARED�MS_RECr � get_errno�MS_BIND�close�open�O_RDONLY�O_CREAT�O_EXCLZunshare� CLONE_NEWNET�formatr )�netnsr r8 r Znetnsdirr9 �doner r r �_create� sD ��" ��� rP c C s� t �� \}}t �� }|dkr�d}zt| |� W n2 ty` } z|}t�� |_W Y d}~n d}~0 0 t� |�}t � |t � dt |��� t � ||� t �d� nVt �dt �|d��d }t�t �||��}t �|� t �|� t �|d� |dur�|�dS )z% Create a network namespace. r N�Ir )r �pipe�forkrP � Exception� traceback� format_exc�tb�pickle�dumps�write�struct�pack�len�_exit�unpack�read�loadsrG �waitpid) rN r ZrctlZwctlr8 �errorr9 �msgZmsglenr r r �create s( re c C s t | ||� dS )zo Attach the network namespace of the process `pid` to `netns` as if it were created with `create`. N)rP )rN r8 r r r r �attach. s rf c C s* t |�}t| �}|�|t� t�|� dS )z% Remove a network namespace. N)r r Zumount2� MNT_DETACHr �unlink)rN r r r r r �remove6 s ri c C s� d}t |�}t| t�r�t| �}tj�| �ttj�| ��v rf|tj tj B @ tj tj B kr|t t j d| ��n|tj @ r|t| |d� t�|tj�}d}n,t| t�r�| �� }nt| t�r�| }ntd��|�t|t�}|r�t�|� |dkr�t t�� d| ��dS ) a Set netns for the current process. The flags semantics is the same as for the `open(2)` call: - O_CREAT -- create netns, if doesn't exist - O_CREAT | O_EXCL -- create only if doesn't exist Note that "main" netns has no name. But you can access it with:: setns('foo') # move to netns foo setns('/proc/1/ns/net') # go back to default netns See also `pushns()`/`popns()`/`dropns()` Changed in 0.5.1: the routine closes the ns fd if it's not provided via arguments. Fz netns existsr Tz&netns should be a string or an open fdr zfailed to open netnsN)r � isinstancer r r r �basenamer# r rJ rK r0 r1 rA re rH rI �file�filenor6 � RuntimeErrorZsyscall� __NR_setnsrL rG r rE )rN �flagsr Znewfdr Znsfdrc r r r �setns@ s* rq c C s, t �t�dtj�� | dur(t| |d� dS )a4 Save the current netns in order to return to it later. If newns is specified, change to it:: # --> the script in the "main" netns netns.pushns("test") # --> changed to "test", the "main" is saved netns.popns() # --> "test" is dropped, back to the "main" z/proc/self/ns/netNr )� __saved_nsr5 r rH rI rq )Znewnsr r r r �pushnsm s rs c C sF t �� }zt|| d� W n ty6 t �|� � Y n0 t�|� dS )z- Restore the previously saved netns. r N)rr �poprq rT r5 r rG �r �fdr r r �popns~ s rw c C s. t �� }zt�|� W n ty( Y n0 dS )z: Discard the last saved with `pushns()` namespace N)rr rt r rG rT ru r r r �dropns� s rx )N)N)NN)N)N)N)NN)N)N)-�__doc__r Z ctypes.utilr1 �ior �os.pathrX r[ rU Zpyroute2r Zpyroute2.commonr rl � NameError�IOBaseZ__NR�get�machine�archro rL rg rF rD rC r rr r r r r# r+ r: r= rP re rf ri rJ rq rs rw rx r r r r �<module> sd R � / -
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