[PATCH iproute2] ss: add support for delivered and delivered_ce fields

[Eric Dumazet]

Kernel support was added in linux-4.18 in commit feb5f2ec6464
("tcp: export packets delivery info")

Tested:

ss -ti
...
ESTAB   0 2270520      [2607:f8b0:8099:e16::]:47646   
[2607:f8b0:8099:e18::]:38953
         ts sack cubic wscale:8,8 rto:7 rtt:2.824/0.278 mss:1428
     pmtu:1500 rcvmss:536 advmss:1428 cwnd:89 ssthresh:62 bytes_acked:2097871945
    segs_out:1469144 segs_in:65221 data_segs_out:1469142 send 360.0Mbps 
lastsnd:2
    lastrcv:99231 lastack:2 pacing_rate 431.9Mbps delivery_rate 246.4Mbps
(*) delivered:1469099 delivered_ce:424799
    busy:99231ms unacked:44 rcv_space:14280 rcv_ssthresh:65535
    notsent:2207688 minrtt:0.228

Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 misc/ss.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/misc/ss.c b/misc/ss.c
index 
e4d6ae489e798419fa6ce6fb0f4b8b0b3232adf6..3aa94f235085512510dca9fd597e8e37aaaf0fd3
 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -817,6 +817,8 @@ struct tcpstat {
        unsigned int        fackets;
        unsigned int        reordering;
        unsigned int        not_sent;
+       unsigned int        delivered;
+       unsigned int        delivered_ce;
        double              rcv_rtt;
        double              min_rtt;
        int                 rcv_space;
@@ -2483,6 +2485,10 @@ static void tcp_stats_print(struct tcpstat *s)
 
        if (s->delivery_rate)
                out(" delivery_rate %sbps", sprint_bw(b1, s->delivery_rate));
+       if (s->delivered)
+               out(" delivered:%u", s->delivered);
+       if (s->delivered_ce)
+               out(" delivered_ce:%u", s->delivered_ce);
        if (s->app_limited)
                out(" app_limited");
 
@@ -2829,6 +2835,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, 
struct inet_diag_msg *r,
                s.busy_time = info->tcpi_busy_time;
                s.rwnd_limited = info->tcpi_rwnd_limited;
                s.sndbuf_limited = info->tcpi_sndbuf_limited;
+               s.delivered = info->tcpi_delivered;
+               s.delivered_ce = info->tcpi_delivered_ce;
                tcp_stats_print(&s);
                free(s.dctcp);
                free(s.bbr_info);
-- 
2.20.0.rc0.387.gc7a69e6b6c-goog