From: Eric Dumazet <[email protected]> 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 <[email protected]> --- misc/ss.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/misc/ss.c b/misc/ss.c index 4454bd1..7f79eea 100644 --- 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;
