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Commit 9cb1eccf authored by Eric Dumazet's avatar Eric Dumazet Committed by Stephen Hemminger
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ss: add fastopen support 

ss -i can output "fastopen" attribute if socket used Fast Open
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarStephen Hemminger <stephen@networkplumber.org>
parent 5f409678
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Showing with 226 additions and 23 deletions
include/linux/tcp.h 0 → 100644
View file @ 9cb1eccf
/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions for the TCP protocol.
*
* Version: @(#)tcp.h 1.0.2 04/28/93
*
* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _LINUX_TCP_H
#define _LINUX_TCP_H
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/socket.h>
struct tcphdr {
__be16 source;
__be16 dest;
__be32 seq;
__be32 ack_seq;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u16 res1:4,
doff:4,
fin:1,
syn:1,
rst:1,
psh:1,
ack:1,
urg:1,
ece:1,
cwr:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
__u16 doff:4,
res1:4,
cwr:1,
ece:1,
urg:1,
ack:1,
psh:1,
rst:1,
syn:1,
fin:1;
#else
#error "Adjust your <asm/byteorder.h> defines"
#endif
__be16 window;
__sum16 check;
__be16 urg_ptr;
};
/*
* The union cast uses a gcc extension to avoid aliasing problems
* (union is compatible to any of its members)
* This means this part of the code is -fstrict-aliasing safe now.
*/
union tcp_word_hdr {
struct tcphdr hdr;
__be32 words[5];
};
#define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
enum {
TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000),
TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000),
TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000),
TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000),
TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000),
TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000),
TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000),
TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000),
TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000),
TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000)
};
/*
* TCP general constants
*/
#define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */
#define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */
/* TCP socket options */
#define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */
#define TCP_MAXSEG 2 /* Limit MSS */
#define TCP_CORK 3 /* Never send partially complete segments */
#define TCP_KEEPIDLE 4 /* Start keeplives after this period */
#define TCP_KEEPINTVL 5 /* Interval between keepalives */
#define TCP_KEEPCNT 6 /* Number of keepalives before death */
#define TCP_SYNCNT 7 /* Number of SYN retransmits */
#define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */
#define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */
#define TCP_WINDOW_CLAMP 10 /* Bound advertised window */
#define TCP_INFO 11 /* Information about this connection. */
#define TCP_QUICKACK 12 /* Block/reenable quick acks */
#define TCP_CONGESTION 13 /* Congestion control algorithm */
#define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */
#define TCP_THIN_LINEAR_TIMEOUTS 16 /* Use linear timeouts for thin streams*/
#define TCP_THIN_DUPACK 17 /* Fast retrans. after 1 dupack */
#define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */
#define TCP_REPAIR 19 /* TCP sock is under repair right now */
#define TCP_REPAIR_QUEUE 20
#define TCP_QUEUE_SEQ 21
#define TCP_REPAIR_OPTIONS 22
#define TCP_FASTOPEN 23 /* Enable FastOpen on listeners */
#define TCP_TIMESTAMP 24
struct tcp_repair_opt {
__u32 opt_code;
__u32 opt_val;
};
enum {
TCP_NO_QUEUE,
TCP_RECV_QUEUE,
TCP_SEND_QUEUE,
TCP_QUEUES_NR,
};
/* for TCP_INFO socket option */
#define TCPI_OPT_TIMESTAMPS 1
#define TCPI_OPT_SACK 2
#define TCPI_OPT_WSCALE 4
#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 */
enum tcp_ca_state {
TCP_CA_Open = 0,
#define TCPF_CA_Open (1<<TCP_CA_Open)
TCP_CA_Disorder = 1,
#define TCPF_CA_Disorder (1<<TCP_CA_Disorder)
TCP_CA_CWR = 2,
#define TCPF_CA_CWR (1<<TCP_CA_CWR)
TCP_CA_Recovery = 3,
#define TCPF_CA_Recovery (1<<TCP_CA_Recovery)
TCP_CA_Loss = 4
#define TCPF_CA_Loss (1<<TCP_CA_Loss)
};
struct tcp_info {
__u8 tcpi_state;
__u8 tcpi_ca_state;
__u8 tcpi_retransmits;
__u8 tcpi_probes;
__u8 tcpi_backoff;
__u8 tcpi_options;
__u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
__u32 tcpi_rto;
__u32 tcpi_ato;
__u32 tcpi_snd_mss;
__u32 tcpi_rcv_mss;
__u32 tcpi_unacked;
__u32 tcpi_sacked;
__u32 tcpi_lost;
__u32 tcpi_retrans;
__u32 tcpi_fackets;
/* Times. */
__u32 tcpi_last_data_sent;
__u32 tcpi_last_ack_sent; /* Not remembered, sorry. */
__u32 tcpi_last_data_recv;
__u32 tcpi_last_ack_recv;
/* Metrics. */
__u32 tcpi_pmtu;
__u32 tcpi_rcv_ssthresh;
__u32 tcpi_rtt;
__u32 tcpi_rttvar;
__u32 tcpi_snd_ssthresh;
__u32 tcpi_snd_cwnd;
__u32 tcpi_advmss;
__u32 tcpi_reordering;
__u32 tcpi_rcv_rtt;
__u32 tcpi_rcv_space;
__u32 tcpi_total_retrans;
};
/* for TCP_MD5SIG socket option */
#define TCP_MD5SIG_MAXKEYLEN 80
struct tcp_md5sig {
struct __kernel_sockaddr_storage tcpm_addr; /* address associated */
__u16 __tcpm_pad1; /* zero */
__u16 tcpm_keylen; /* key length */
__u32 __tcpm_pad2; /* zero */
__u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* key (binary) */
};
#endif /* _LINUX_TCP_H */
misc/ss.c
View file @ 9cb1eccf
......@@ -32,7 +32,7 @@
#include "libnetlink.h"
#include "SNAPSHOT.h"
#include <netinet/tcp.h>
#include <linux/tcp.h>
#include <linux/sock_diag.h>
#include <linux/inet_diag.h>
#include <linux/unix_diag.h>
......@@ -399,32 +399,32 @@ static int get_slabstat(struct slabstat *s)
static const char *sstate_name[] = {
"UNKNOWN",
[TCP_ESTABLISHED] = "ESTAB",
[TCP_SYN_SENT] = "SYN-SENT",
[TCP_SYN_RECV] = "SYN-RECV",
[TCP_FIN_WAIT1] = "FIN-WAIT-1",
[TCP_FIN_WAIT2] = "FIN-WAIT-2",
[TCP_TIME_WAIT] = "TIME-WAIT",
[TCP_CLOSE] = "UNCONN",
[TCP_CLOSE_WAIT] = "CLOSE-WAIT",
[TCP_LAST_ACK] = "LAST-ACK",
[TCP_LISTEN] = "LISTEN",
[TCP_CLOSING] = "CLOSING",
[SS_ESTABLISHED] = "ESTAB",
[SS_SYN_SENT] = "SYN-SENT",
[SS_SYN_RECV] = "SYN-RECV",
[SS_FIN_WAIT1] = "FIN-WAIT-1",
[SS_FIN_WAIT2] = "FIN-WAIT-2",
[SS_TIME_WAIT] = "TIME-WAIT",
[SS_CLOSE] = "UNCONN",
[SS_CLOSE_WAIT] = "CLOSE-WAIT",
[SS_LAST_ACK] = "LAST-ACK",
[SS_LISTEN] = "LISTEN",
[SS_CLOSING] = "CLOSING",
};
static const char *sstate_namel[] = {
"UNKNOWN",
[TCP_ESTABLISHED] = "established",
[TCP_SYN_SENT] = "syn-sent",
[TCP_SYN_RECV] = "syn-recv",
[TCP_FIN_WAIT1] = "fin-wait-1",
[TCP_FIN_WAIT2] = "fin-wait-2",
[TCP_TIME_WAIT] = "time-wait",
[TCP_CLOSE] = "unconnected",
[TCP_CLOSE_WAIT] = "close-wait",
[TCP_LAST_ACK] = "last-ack",
[TCP_LISTEN] = "listening",
[TCP_CLOSING] = "closing",
[SS_ESTABLISHED] = "established",
[SS_SYN_SENT] = "syn-sent",
[SS_SYN_RECV] = "syn-recv",
[SS_FIN_WAIT1] = "fin-wait-1",
[SS_FIN_WAIT2] = "fin-wait-2",
[SS_TIME_WAIT] = "time-wait",
[SS_CLOSE] = "unconnected",
[SS_CLOSE_WAIT] = "close-wait",
[SS_LAST_ACK] = "last-ack",
[SS_LISTEN] = "listening",
[SS_CLOSING] = "closing",
};
struct tcpstat
......@@ -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])
......
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