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File: //usr/lib/python3/dist-packages/cloudinit/sources/helpers/__pycache__/netlink.cpython-38.pyc
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    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 */
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d�}q0|r�|dkr�dSt�d||�t||�S)a�Reads Interface name and operational state from RTA Data.

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rIcs6t�d�d���fdd�}t|dtgttg|��S)z�Block until a single nic is attached.

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�rXcsf|dk	std���dk	s td��t��dks4td���fdd�}t�d�t|�ttgttg|�dS)	a�Block until media disconnect and connect has happened on an interface.
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    :param: operstates: Operational states to listen.
    :param: should_continue_callback: Specifies when to stop listening.
    NzNetlink socket is nonezread %d bytes from socketzLength of data after concat %drz#Data is smaller than netlink headerz*Partial data. Smaller than netlink messagerz"offset to next netlink message: %dz!Failed to read rta attributes: %sz6Ignored netlink event on interface %s. Waiting for %s.)�RuntimeError�bytesrSr9�SELECT_TIMEOUTr'r(r/r0r4rrBrrIrr)r)Z
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