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This makes it possible to retrieve per-connection statistical information such as the receive window size, RTT, or goodput, using a newly added TCP_STATS getsockopt(3) option, and extract them using the stats_voistat_fetch(3) API. See the net/tcprtt port for an example consumer of this API. Compared to the existing TCP_INFO system, the main differences are that this mechanism is easy to extend without breaking ABI, and provides statistical information instead of raw "snapshots" of values at a given point in time. stats(3) is more generic and can be used in both userland and the kernel. Reviewed by: thj Tested by: thj Obtained from: Netflix Relnotes: yes Sponsored by: Klara Inc, Netflix Differential Revision: https://reviews.freebsd.org/D20655
15 lines
314 B
Makefile
15 lines
314 B
Makefile
# $FreeBSD$
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LIB= stats
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SHLIBDIR?= /lib
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SHLIB_MAJOR= 0
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SRCS= subr_stats.c tcp_stats.c
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# To debug, comment WITHOUT_ASSERT_DEBUG= and uncomment CFLAGS:=
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WITHOUT_ASSERT_DEBUG=
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#CFLAGS:=${CFLAGS:C/-O[0-9]/-O0 -g3/} -DDIAGNOSTIC
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.PATH: ${.CURDIR}/../../sys/kern ${.CURDIR}/../../sys/netinet
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.include <bsd.lib.mk>
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