ss: add more TCP_INFO components
Allow ss -i to display more TCP informations :
unacked:N Number of un-acked packets
retrans:X/Y X: number of outstanding retransmit packets
Y: total number of retransmits for the session
lost:N Number of lost packets (tcpi_lost)
sacked:N Number of sacked packets (tcpi_sacked)
facked:N Number of facked packets (tcpi_facked)
reordering:N Reordering level (if different of 3)
Example :
$ ss -emoi dst 10.7.7.83
tcp ESTAB 0 1154056 10.7.7.84:54127 10.7.7.83:34342
timer:(on,200ms,0) ino:57003 sk:ffff88063c51d0c0 <->
skmem:(r0,rb89280,t0,tb2097152,f726504,w1436184,o0,bl0) ts sack cubic
wscale:7,6 rto:310 rtt:107.375/1 mss:1448 cwnd:568 ssthresh:108 send
61.3Mbps unacked:568 retrans:0/21 reordering:127 rcv_space:29200
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
diff --git a/misc/ss.c b/misc/ss.c
index e0d11ff..c0369f1 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -1435,6 +1435,19 @@
/ rtt));
}
+ if (info->tcpi_unacked)
+ printf(" unacked:%u", info->tcpi_unacked);
+ if (info->tcpi_retrans || info->tcpi_total_retrans)
+ printf(" retrans:%u/%u", info->tcpi_retrans,
+ info->tcpi_total_retrans);
+ if (info->tcpi_lost)
+ printf(" lost:%u", info->tcpi_lost);
+ if (info->tcpi_sacked && r->idiag_state != SS_LISTEN)
+ printf(" sacked:%u", info->tcpi_sacked);
+ if (info->tcpi_fackets)
+ printf(" fackets:%u", info->tcpi_fackets);
+ if (info->tcpi_reordering != 3)
+ printf(" reordering:%d", info->tcpi_reordering);
if (info->tcpi_rcv_rtt)
printf(" rcv_rtt:%g", (double) info->tcpi_rcv_rtt/1000);
if (info->tcpi_rcv_space)
