ss: print tcpi_rcv_mss and tcpi_advmss

tcpi_rcv_mss and tcpi_advmss tcp info fields were not yet reported
by ss.

While adding GRO support to packetdrill, I found this was useful.

Signed-off-by: Eric Dumazet <edumazet@google.com>

diff --git a/misc/ss.c b/misc/ss.c
index 4454bd16cd60bb132b749a72a0752a6b487a21b9..7f79eeaabe82a4b20a584ad29b03ac2e1a547d6f 100644 (file)
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -707,6 +707,8 @@ struct tcpstat {
        int                 snd_wscale;
        int                 rcv_wscale;
        int                 mss;
+       int                 rcv_mss;
+       int                 advmss;
        unsigned int        cwnd;
        unsigned int        lastsnd;
        unsigned int        lastrcv;
@@ -1872,6 +1874,10 @@ static void tcp_stats_print(struct tcpstat *s)
 
        if (s->mss)
                printf(" mss:%d", s->mss);
+       if (s->rcv_mss)
+               printf(" rcvmss:%d", s->rcv_mss);
+       if (s->advmss)
+               printf(" advmss:%d", s->advmss);
        if (s->cwnd)
                printf(" cwnd:%u", s->cwnd);
        if (s->ssthresh)
@@ -2189,6 +2195,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
                s.rttvar         = (double)info->tcpi_rttvar / 1000;
                s.ato            = (double)info->tcpi_ato / 1000;
                s.mss            = info->tcpi_snd_mss;
+               s.rcv_mss        = info->tcpi_rcv_mss;
+               s.advmss         = info->tcpi_advmss;
                s.rcv_space      = info->tcpi_rcv_space;
                s.rcv_rtt        = (double)info->tcpi_rcv_rtt / 1000;
                s.lastsnd        = info->tcpi_last_data_sent;