Current File : //usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pyo
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    non-blocking mode since we're only receiving messages.

    :returns: netlink socket in non-blocking mode
    :raises: NetlinkCreateSocketError
    is*Exception during netlink socket create: %ssCreated netlink socket(
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NETLINK_ROUTEtbindtostgetpidtRTMGRP_LINKtsetblockingterrorRtLOGtdebug(tnetlink_sockettetmsg((sE/usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pytcreate_bound_netlink_socket=s	

cCsKtjt|t �\}}}}}tjd|�t|||||�S(sGets netlink message type and length

    :param: data read from netlink socket
    :returns: netlink message type
    :raises: AssertionError if data is None or data is not >= NLMSGHDR_SIZE
    struct nlmsghdr {
               __u32 nlmsg_len;    /* Length of message including header */
               __u16 nlmsg_type;   /* Type of message content */
               __u16 nlmsg_flags;  /* Additional flags */
               __u32 nlmsg_seq;    /* Sequence number */
               __u32 nlmsg_pid;    /* Sender port ID */
    };
    sGot netlink msg of type %d(tstructtunpacktNLMSGHDR_FMTtMSG_TYPE_OFFSETRR R(Rtmsg_lentmsg_typeRRR((sE/usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pytget_netlink_msg_headerSs	cCsptj|ggg|�\}}}||kr4dStjd�|jt�}|dkrltjd�n|S(s�Select and read from the netlink socket if ready.

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    :param: timeout: specify a timeout value (integer) to wait while reading,
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    :returns: string of data read (max length = <MAX_SIZE>) from socket,
              if no data read, returns None
    :raises: AssertionError if netlink_socket is None
    snetlink socket ready for reads,Reading from Netlink socket returned no dataN(tselecttNoneRR trecvtMAX_SIZER(R!ttimeouttread_sett_R((sE/usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pytread_netlink_socketjs$
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rgdSX||t||!}t|||�S(s(Unpack a single rta attribute.

    :param: data: string of data read from netlink socket
    :param: offset: starting offset of RTA Attribute
    :return: RTAAttr object with length, type and data. On error, return None.
    :raises: AssertionError if data is None or offset is not integer.
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$cCsd}}t}x�|t|�kr�t||�}|sJ|jdkrNPnt|jtt}||j|7}|jtkr�t|j	�}q|jt
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d�}qqW|s�|dkr�dStjd||�t||�S(s�Reads Interface name and operational state from RTA Data.

    :param: data: string of data read from netlink socket
    :returns: InterfaceOperstate object containing if_name and oper_state.
              None if data does not contain valid IFLA_OPERSTATE and
              IFLA_IFNAME messages.
    :raises: AssertionError if data is None or length of data is
             smaller than RTATTR_START_OFFSET.
    isutf-8ts!rta attrs: ifname %s operstate %dN(R-tRTATTR_START_OFFSETtlenR9Rt
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s�Block until media disconnect and connect has happened on an interface.
    Listens on netlink socket to receive netlink events and when the carrier
    changes from 0 to 1, it considers event has happened and
    return from this function

    :param: netlink_socket: netlink_socket to receive events
    :param: ifname: Interface name to lookout for netlink events
    :raises: AssertionError if netlink_socket is None or ifname is None.
    s1Wait for media disconnect and reconnect to happensread %d bytes from socketsLength of data after concat %dis#Data is smaller than netlink headers*Partial data. Smaller than netlink messageis"offset to next netlink message: %ds!Failed to read rta attributes: %ss6Ignored netlink event on interface %s. Waiting for %s.sMedia switch happened on %s.N(tOPER_UPtbytesRR tTrueR3tSELECT_TIMEOUTR-R<t
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tcarriertprevCarrierRt	recv_dataR5tdatalentnl_msgtnlheaderRDtinterface_statetisVnetSwitch((sE/usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pyt!wait_for_media_disconnect_connect�sZ
	
	





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IFINFOMSG_FMTtcalcsizeRKtIFINFOMSG_SIZER;R7R=R@R>tOPER_UNKNOWNtOPER_NOTPRESENTRNtOPER_LOWERLAYERDOWNtOPER_TESTINGtOPER_DORMANTRGRR	RtRuntimeErrorRR$R+R-R3R9RFRW(((sE/usr/lib/python2.7/site-packages/cloudinit/sources/helpers/netlink.pyt<module>s\
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