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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>
This commit is contained in:
Eric Dumazet 2017-02-02 05:47:27 -08:00 committed by Stephen Hemminger
parent e7867c34e8
commit 38e6dbc4b3
1 changed files with 8 additions and 0 deletions
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8
misc/ss.c
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@ -707,6 +707,8 @@ struct tcpstat {
int snd_wscale; int snd_wscale;
int rcv_wscale; int rcv_wscale;
int mss; int mss;
int rcv_mss;
int advmss;
unsigned int cwnd; unsigned int cwnd;
unsigned int lastsnd; unsigned int lastsnd;
unsigned int lastrcv; unsigned int lastrcv;
@ -1872,6 +1874,10 @@ static void tcp_stats_print(struct tcpstat *s)
if (s->mss) if (s->mss)
printf(" mss:%d", 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) if (s->cwnd)
printf(" cwnd:%u", s->cwnd); printf(" cwnd:%u", s->cwnd);
if (s->ssthresh) 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.rttvar = (double)info->tcpi_rttvar / 1000;
s.ato = (double)info->tcpi_ato / 1000; s.ato = (double)info->tcpi_ato / 1000;
s.mss = info->tcpi_snd_mss; 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_space = info->tcpi_rcv_space;
s.rcv_rtt = (double)info->tcpi_rcv_rtt / 1000; s.rcv_rtt = (double)info->tcpi_rcv_rtt / 1000;
s.lastsnd = info->tcpi_last_data_sent; s.lastsnd = info->tcpi_last_data_sent;