Listing flow labels.

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List of currently allocated flow labels may be read from /proc/net/ip6_flowlabel.

Label S Owner Users Linger Expires Dst                              Opt
A1BE5 1 0     0     6      3       3ffe2400000000010a0020fffe71fb30 0

Label is hexadecimal flow label value.
S is sharing style.
Owner is ID of creator, it is zero, pid or uid, depending on sharing style.
Users is number of applications using the label now.
Linger is linger of this label in seconds.
Expires is time until expiration of the label in seconds. It may be negative, if the label is in use.
Dst is IPv6 destination address.
Opt is length of options, associated with the label. Option data are not accessible.