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ss: add missing path MTU parameter 

v3:
   Rebase and use out() instead of printf().
v2:
   Print the path MTU immediately after the MSS, as it is easier to parse
   for humans (suggested by Neal Cardwell).

Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Roman Mashak 2017-12-15 09:27:42 -05:00 committed by Stephen Hemminger
parent 2c6aaad949
commit 3d791a326b
2 changed files with 8 additions and 0 deletions
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4
man/man8/ss.8
View File

@ -184,6 +184,10 @@ max segment size
congestion window size congestion window size
.P .P
.TP .TP
.B pmtu:<pmtu>
path MTU value
.P
.TP
.B ssthresh:<ssthresh> .B ssthresh:<ssthresh>
tcp congestion window slow start threshold tcp congestion window slow start threshold
.P .P

4
misc/ss.c
View File

@ -790,6 +790,7 @@ struct tcpstat {
int mss; int mss;
int rcv_mss; int rcv_mss;
int advmss; int advmss;
unsigned int pmtu;
unsigned int cwnd; unsigned int cwnd;
unsigned int lastsnd; unsigned int lastsnd;
unsigned int lastrcv; unsigned int lastrcv;
@ -2360,6 +2361,8 @@ static void tcp_stats_print(struct tcpstat *s)
if (s->mss) if (s->mss)
out(" mss:%d", s->mss); out(" mss:%d", s->mss);
if (s->pmtu)
out(" pmtu:%u", s->pmtu);
if (s->rcv_mss) if (s->rcv_mss)
out(" rcvmss:%d", s->rcv_mss); out(" rcvmss:%d", s->rcv_mss);
if (s->advmss) if (s->advmss)
@ -2707,6 +2710,7 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
s.reordering = info->tcpi_reordering; s.reordering = info->tcpi_reordering;
s.rcv_ssthresh = info->tcpi_rcv_ssthresh; s.rcv_ssthresh = info->tcpi_rcv_ssthresh;
s.cwnd = info->tcpi_snd_cwnd; s.cwnd = info->tcpi_snd_cwnd;
s.pmtu = info->tcpi_pmtu;
if (info->tcpi_snd_ssthresh < 0xFFFF) if (info->tcpi_snd_ssthresh < 0xFFFF)
s.ssthresh = info->tcpi_snd_ssthresh; s.ssthresh = info->tcpi_snd_ssthresh;