From 260804f422fd33aa78379270d564a495b7bb5717 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 25 Jun 2013 13:29:17 -0700 Subject: [PATCH] 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 Cc: Yuchung Cheng Cc: Neal Cardwell --- misc/ss.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/misc/ss.c b/misc/ss.c index e0d11ff0..c0369f11 100644 --- a/misc/ss.c +++ b/misc/ss.c @@ -1435,6 +1435,19 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r, / 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)