From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: [PATCH iproute2] ss: add fastopen support Date: Fri, 29 Mar 2013 13:51:57 -0700 Message-ID: <1364590317.5113.63.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev , Yuchung Cheng To: Stephen Hemminger Return-path: Received: from mail-pd0-f181.google.com ([209.85.192.181]:65190 "EHLO mail-pd0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756894Ab3C2UwB (ORCPT ); Fri, 29 Mar 2013 16:52:01 -0400 Received: by mail-pd0-f181.google.com with SMTP id q10so392622pdj.26 for ; Fri, 29 Mar 2013 13:52:00 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet ss -i can output "fastopen" attribute if socket used Fast Open Signed-off-by: Eric Dumazet Cc: Yuchung Cheng --- include/netinet/tcp.h | 5 +++-- misc/ss.c | 2 ++ 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/include/netinet/tcp.h b/include/netinet/tcp.h index 3f890a1..ba79c63 100644 --- a/include/netinet/tcp.h +++ b/include/netinet/tcp.h @@ -171,8 +171,9 @@ enum # define TCPI_OPT_TIMESTAMPS 1 # define TCPI_OPT_SACK 2 # define TCPI_OPT_WSCALE 4 -# define TCPI_OPT_ECN 8 -# define TCPI_OPT_ECN_SEEN 16 +# define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ +# define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ +# define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ /* Values for tcpi_state. */ enum tcp_ca_state diff --git a/misc/ss.c b/misc/ss.c index da9d32c..b7bcd80 100644 --- a/misc/ss.c +++ b/misc/ss.c @@ -1392,6 +1392,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r) printf(" ecn"); if (info->tcpi_options & TCPI_OPT_ECN_SEEN) printf(" ecnseen"); + if (info->tcpi_options & TCPI_OPT_SYN_DATA) + printf(" fastopen"); } if (tb[INET_DIAG_CONG])