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authorStefano Brivio <sbrivio@redhat.com>2022-01-25 19:55:54 +0100
committerStefano Brivio <sbrivio@redhat.com>2022-01-26 16:30:59 +0100
commit1776de0140fb663777d4590fbb849c1d0a0c7885 (patch)
tree397ae4d1a18f823bb253135027574fb9527a6b7b /udp.c
parentdaf8d057cebf4b304c11b10cd6e6c98e19710630 (diff)
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tcp, netlink, HAS{BYTES_ACKED,MIN_RTT,GETRANDOM} and NETLINK_GET_STRICT_CHK
tcpi_bytes_acked and tcpi_min_rtt are only available on recent kernel versions: provide fall-back paths (incurring some grade of performance penalty). Support for getrandom() was introduced in Linux 3.17 and glibc 2.25: provide an alternate mechanism for that as well, reading from /dev/random. Also check if NETLINK_GET_STRICT_CHK is defined before using it: it's not strictly needed, we'll filter out irrelevant results from netlink anyway. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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