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| author | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2019-12-02 20:58:04 +0000 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2022-07-11 11:52:46 +0200 |
| commit | 0c4d87ca5f9aaf2b3af4f435bc7d342dc7a6705f (patch) | |
| tree | 62df7142f3604d824e95fb6eccb5671a80680af6 | |
| parent | 0c854dd6d15774e12323110b699e2d0c90b7635a (diff) | |
| download | newlib-0c4d87ca5f9aaf2b3af4f435bc7d342dc7a6705f.tar.gz newlib-0c4d87ca5f9aaf2b3af4f435bc7d342dc7a6705f.tar.bz2 newlib-0c4d87ca5f9aaf2b3af4f435bc7d342dc7a6705f.zip | |
Make use of the stats(3) framework in the TCP stack.
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
| -rw-r--r-- | newlib/libc/sys/rtems/include/netinet/tcp.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/newlib/libc/sys/rtems/include/netinet/tcp.h b/newlib/libc/sys/rtems/include/netinet/tcp.h index 125cacb28..4e06c9792 100644 --- a/newlib/libc/sys/rtems/include/netinet/tcp.h +++ b/newlib/libc/sys/rtems/include/netinet/tcp.h @@ -168,6 +168,7 @@ struct tcphdr { #define TCP_NOOPT 8 /* don't use TCP options */ #define TCP_MD5SIG 16 /* use MD5 digests (RFC2385) */ #define TCP_INFO 32 /* retrieve tcp_info structure */ +#define TCP_STATS 33 /* retrieve stats blob structure */ #define TCP_LOG 34 /* configure event logging for connection */ #define TCP_LOGBUF 35 /* retrieve event log for connection */ #define TCP_LOGID 36 /* configure log ID to correlate connections */ @@ -364,4 +365,18 @@ struct tcp_function_set { */ #define TLS_SET_RECORD_TYPE 1 +/* + * TCP specific variables of interest for tp->t_stats stats(9) accounting. + */ +#define VOI_TCP_TXPB 0 /* Transmit payload bytes */ +#define VOI_TCP_RETXPB 1 /* Retransmit payload bytes */ +#define VOI_TCP_FRWIN 2 /* Foreign receive window */ +#define VOI_TCP_LCWIN 3 /* Local congesiton window */ +#define VOI_TCP_RTT 4 /* Round trip time */ +#define VOI_TCP_CSIG 5 /* Congestion signal */ +#define VOI_TCP_GPUT 6 /* Goodput */ +#define VOI_TCP_CALCFRWINDIFF 7 /* Congestion avoidance LCWIN - FRWIN */ +#define VOI_TCP_GPUT_ND 8 /* Goodput normalised delta */ +#define VOI_TCP_ACKLEN 9 /* Average ACKed bytes per ACK */ + #endif /* !_NETINET_TCP_H_ */ |