struct ifa_cacheinfo contains the address's creation time, update time, preferred lifetime remaining, and valid lifetime remaining. Link: <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/if_addr.h?h=v6.11#n60> Signed-off-by: Alex Henrie <alexhenrie24@xxxxxxxxx> --- Changes from v1: - Move link to Link line in commit message - Add the word "remaining" to clarify that the reported values will decrease over time - Say UINT32_MAX instead of -1 - Add a short paragraph to explain the constraints on the minimum and maximum lifetimes Thanks to Kuniyuki and Alejandro for your feedback. --- man/man7/rtnetlink.7 | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/man/man7/rtnetlink.7 b/man/man7/rtnetlink.7 index 86ed459bb..ed08834b0 100644 --- a/man/man7/rtnetlink.7 +++ b/man/man7/rtnetlink.7 @@ -176,7 +176,24 @@ IFA_BROADCAST:raw protocol address:broadcast address IFA_ANYCAST:raw protocol address:anycast address IFA_CACHEINFO:struct ifa_cacheinfo:Address information .TE -.\" FIXME Document struct ifa_cacheinfo +.IP +.EX +struct ifa_cacheinfo { + __u32 ifa_prefered; /* Preferred lifetime remaining, in seconds */ + __u32 ifa_valid; /* Valid lifetime remaining, in seconds */ + __u32 cstamp; /* Creation timestamp, in hundredths of seconds */ + __u32 tstamp; /* Update timestamp, in hundredths of seconds */ +}; +.EE +.IP +.I ifa_valid +cannot be zero, and +.I ifa_prefered +cannot be greater than +.IR ifa_valid . +A value of +.B UINT32_MAX +represents an infinite lifetime. .TP .B RTM_NEWROUTE .TQ -- 2.47.0
