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| Current File : //usr/src/usr.bin/systat/tcp.c |
/*-
* Copyright (c) 1980, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
/* From: */
static char sccsid[] = "@(#)mbufs.c 8.1 (Berkeley) 6/6/93";
static const char rcsid[] =
"Id: mbufs.c,v 1.5 1997/02/24 20:59:03 wollman Exp";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/usr.bin/systat/tcp.c 216370 2010-12-11 08:32:16Z joel $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include "systat.h"
#include "extern.h"
#include "mode.h"
static struct tcpstat curstat, initstat, oldstat;
/*-
--0 1 2 3 4 5 6 7
--0123456789012345678901234567890123456789012345678901234567890123456789012345
00 TCP Connections TCP Packets
01999999999999 connections initiated 999999999999 total packets sent
02999999999999 connections accepted 999999999999 - data
03999999999999 connections established 999999999999 - data (retransmit by dupack)
04999999999999 connections dropped 999999999999 - data (retransmit by sack)
05999999999999 - in embryonic state 999999999999 - ack-only
06999999999999 - on retransmit timeout 999999999999 - window probes
07999999999999 - by keepalive 999999999999 - window updates
08999999999999 - from listen queue 999999999999 - urgent data only
09 999999999999 - control
10 999999999999 - resends by PMTU discovery
11 TCP Timers 999999999999 total packets received
12999999999999 potential rtt updates 999999999999 - in sequence
13999999999999 - successful 999999999999 - completely duplicate
14999999999999 delayed acks sent 999999999999 - with some duplicate data
15999999999999 retransmit timeouts 999999999999 - out-of-order
16999999999999 persist timeouts 999999999999 - duplicate acks
17999999999999 keepalive probes 999999999999 - acks
18999999999999 - timeouts 999999999999 - window probes
19 999999999999 - window updates
20 999999999999 - bad checksum
--0123456789012345678901234567890123456789012345678901234567890123456789012345
--0 1 2 3 4 5 6 7
*/
WINDOW *
opentcp(void)
{
return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
}
void
closetcp(WINDOW *w)
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
void
labeltcp(void)
{
wmove(wnd, 0, 0); wclrtoeol(wnd);
#define L(row, str) mvwprintw(wnd, row, 13, str)
#define R(row, str) mvwprintw(wnd, row, 51, str);
L(0, "TCP Connections"); R(0, "TCP Packets");
L(1, "connections initiated"); R(1, "total packets sent");
L(2, "connections accepted"); R(2, "- data");
L(3, "connections established"); R(3, "- data (retransmit by dupack)");
L(4, "connections dropped"); R(4, "- data (retransmit by sack)");
L(5, "- in embryonic state"); R(5, "- ack-only");
L(6, "- on retransmit timeout"); R(6, "- window probes");
L(7, "- by keepalive"); R(7, "- window updates");
L(8, "- from listen queue"); R(8, "- urgent data only");
R(9, "- control");
R(10, "- resends by PMTU discovery");
L(11, "TCP Timers"); R(11, "total packets received");
L(12, "potential rtt updates"); R(12, "- in sequence");
L(13, "- successful"); R(13, "- completely duplicate");
L(14, "delayed acks sent"); R(14, "- with some duplicate data");
L(15, "retransmit timeouts"); R(15, "- out-of-order");
L(16, "persist timeouts"); R(16, "- duplicate acks");
L(17, "keepalive probes"); R(17, "- acks");
L(18, "- timeouts"); R(18, "- window probes");
R(19, "- window updates");
R(20, "- bad checksum");
#undef L
#undef R
}
static void
domode(struct tcpstat *ret)
{
const struct tcpstat *sub;
int divisor = 1;
switch(currentmode) {
case display_RATE:
sub = &oldstat;
divisor = naptime;
break;
case display_DELTA:
sub = &oldstat;
break;
case display_SINCE:
sub = &initstat;
break;
default:
*ret = curstat;
return;
}
#define DO(stat) ret->stat = (curstat.stat - sub->stat) / divisor
DO(tcps_connattempt);
DO(tcps_accepts);
DO(tcps_connects);
DO(tcps_drops);
DO(tcps_conndrops);
DO(tcps_closed);
DO(tcps_segstimed);
DO(tcps_rttupdated);
DO(tcps_delack);
DO(tcps_timeoutdrop);
DO(tcps_rexmttimeo);
DO(tcps_persisttimeo);
DO(tcps_keeptimeo);
DO(tcps_keepprobe);
DO(tcps_keepdrops);
DO(tcps_sndtotal);
DO(tcps_sndpack);
DO(tcps_sndbyte);
DO(tcps_sndrexmitpack);
DO(tcps_sack_rexmits);
DO(tcps_sndacks);
DO(tcps_sndprobe);
DO(tcps_sndurg);
DO(tcps_sndwinup);
DO(tcps_sndctrl);
DO(tcps_rcvtotal);
DO(tcps_rcvpack);
DO(tcps_rcvbyte);
DO(tcps_rcvbadsum);
DO(tcps_rcvbadoff);
DO(tcps_rcvshort);
DO(tcps_rcvduppack);
DO(tcps_rcvdupbyte);
DO(tcps_rcvpartduppack);
DO(tcps_rcvpartdupbyte);
DO(tcps_rcvoopack);
DO(tcps_rcvoobyte);
DO(tcps_rcvpackafterwin);
DO(tcps_rcvbyteafterwin);
DO(tcps_rcvafterclose);
DO(tcps_rcvwinprobe);
DO(tcps_rcvdupack);
DO(tcps_rcvacktoomuch);
DO(tcps_rcvackpack);
DO(tcps_rcvackbyte);
DO(tcps_rcvwinupd);
DO(tcps_pawsdrop);
DO(tcps_predack);
DO(tcps_preddat);
DO(tcps_pcbcachemiss);
DO(tcps_cachedrtt);
DO(tcps_cachedrttvar);
DO(tcps_cachedssthresh);
DO(tcps_usedrtt);
DO(tcps_usedrttvar);
DO(tcps_usedssthresh);
DO(tcps_persistdrop);
DO(tcps_badsyn);
DO(tcps_mturesent);
DO(tcps_listendrop);
#undef DO
}
void
showtcp(void)
{
struct tcpstat stats;
memset(&stats, 0, sizeof stats);
domode(&stats);
#define DO(stat, row, col) \
mvwprintw(wnd, row, col, "%12lu", stats.stat)
#define L(row, stat) DO(stat, row, 0)
#define R(row, stat) DO(stat, row, 38)
L(1, tcps_connattempt); R(1, tcps_sndtotal);
L(2, tcps_accepts); R(2, tcps_sndpack);
L(3, tcps_connects); R(3, tcps_sndrexmitpack);
L(4, tcps_drops); R(4, tcps_sack_rexmits);
L(5, tcps_conndrops); R(5, tcps_sndacks);
L(6, tcps_timeoutdrop); R(6, tcps_sndprobe);
L(7, tcps_keepdrops); R(7, tcps_sndwinup);
L(8, tcps_listendrop); R(8, tcps_sndurg);
R(9, tcps_sndctrl);
R(10, tcps_mturesent);
R(11, tcps_rcvtotal);
L(12, tcps_segstimed); R(12, tcps_rcvpack);
L(13, tcps_rttupdated); R(13, tcps_rcvduppack);
L(14, tcps_delack); R(14, tcps_rcvpartduppack);
L(15, tcps_rexmttimeo); R(15, tcps_rcvoopack);
L(16, tcps_persisttimeo); R(16, tcps_rcvdupack);
L(17, tcps_keepprobe); R(17, tcps_rcvackpack);
L(18, tcps_keeptimeo); R(18, tcps_rcvwinprobe);
R(19, tcps_rcvwinupd);
R(20, tcps_rcvbadsum);
#undef DO
#undef L
#undef R
}
int
inittcp(void)
{
size_t len;
int name[4];
name[0] = CTL_NET;
name[1] = PF_INET;
name[2] = IPPROTO_TCP;
name[3] = TCPCTL_STATS;
len = 0;
if (sysctl(name, 4, 0, &len, 0, 0) < 0) {
error("sysctl getting tcpstat size failed");
return 0;
}
if (len > sizeof curstat) {
error("tcpstat structure has grown--recompile systat!");
return 0;
}
if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
error("sysctl getting tcpstat failed");
return 0;
}
oldstat = initstat;
return 1;
}
void
resettcp(void)
{
size_t len;
int name[4];
name[0] = CTL_NET;
name[1] = PF_INET;
name[2] = IPPROTO_TCP;
name[3] = TCPCTL_STATS;
len = sizeof initstat;
if (sysctl(name, 4, &initstat, &len, 0, 0) < 0) {
error("sysctl getting tcpstat failed");
}
oldstat = initstat;
}
void
fetchtcp(void)
{
int name[4];
size_t len;
oldstat = curstat;
name[0] = CTL_NET;
name[1] = PF_INET;
name[2] = IPPROTO_TCP;
name[3] = TCPCTL_STATS;
len = sizeof curstat;
if (sysctl(name, 4, &curstat, &len, 0, 0) < 0)
return;
}