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ss: take care of unknown min_rtt 

Kernel sets info->tcpi_min_rtt to ~0U when no RTT sample was ever
taken for the session, thus min_rtt is unknown.

Signed-off-by: Eric Dumazet <edumazet@google.com>
This commit is contained in:
Eric Dumazet 2016-04-13 15:18:38 -07:00 committed by Stephen Hemminger
parent e56a959e55
commit d9ba887e9d
1 changed files with 2 additions and 1 deletions
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3
misc/ss.c
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@ -2019,7 +2019,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
s.segs_out = info->tcpi_segs_out; s.segs_out = info->tcpi_segs_out;
s.segs_in = info->tcpi_segs_in; s.segs_in = info->tcpi_segs_in;
s.not_sent = info->tcpi_notsent_bytes; s.not_sent = info->tcpi_notsent_bytes;
s.min_rtt = (double) info->tcpi_min_rtt / 1000; if (info->tcpi_min_rtt && info->tcpi_min_rtt != ~0U)
s.min_rtt = (double) info->tcpi_min_rtt / 1000;
tcp_stats_print(&s); tcp_stats_print(&s);
free(s.dctcp); free(s.dctcp);
} }