/*      $NetBSD: tcp.c,v 1.16 2014/06/03 22:22:41 joerg Exp $   */

/*
* Copyright (c) 1999, 2000 Andrew Doran <[email protected]>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: tcp.c,v 1.16 2014/06/03 22:22:41 joerg Exp $");
#endif /* not lint */

#include <sys/param.h>
#include <sys/sysctl.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>

#include <string.h>

#include "systat.h"
#include "extern.h"

#define LHD(row, str)           mvwprintw(wnd, row, 10, str)
#define RHD(row, str)           mvwprintw(wnd, row, 45, str)
#define SHOW(row, col, stat) \
   mvwprintw(wnd, row, col, "%9llu", (unsigned long long)curstat[stat])

enum update {
       UPDATE_TIME,
       UPDATE_BOOT,
       UPDATE_RUN,
};

static enum update update = UPDATE_TIME;
static uint64_t curstat[TCP_NSTATS];
static uint64_t newstat[TCP_NSTATS];
static uint64_t oldstat[TCP_NSTATS];

WINDOW *
opentcp(void)
{

       return (subwin(stdscr, -1, 0, 5, 0));
}

void
closetcp(WINDOW *w)
{

       if (w != NULL) {
               wclear(w);
               wrefresh(w);
               delwin(w);
       }
}

void
labeltcp(void)
{

       wmove(wnd, 0, 0); wclrtoeol(wnd);

       LHD(0,  "connections initiated");
       LHD(1,  "connections accepted");
       LHD(2,  "connections established");

       LHD(4,  "connections dropped");
       LHD(5,  "  in embryonic state");
       LHD(6,  "  on retransmit timeout");
       LHD(7,  "  by keepalive");
       LHD(8,  "  by persist");

       LHD(10, "potential rtt updates");
       LHD(11, "successful rtt updates");
       LHD(12, "delayed acks sent");
       LHD(13, "retransmit timeouts");
       LHD(14, "persist timeouts");
       LHD(15, "keepalive probes");
       LHD(16, "keepalive timeouts");

       RHD(9,  "total TCP packets received");
       RHD(10, "  in sequence");
       RHD(11, "  completely duplicate");
       RHD(12, "  with some duplicate data");
       RHD(13, "  out of order");
       RHD(14, "  duplicate acks");
       RHD(15, "  acks");
       RHD(16, "  window probes");
       RHD(17, "  window updates");

       RHD(0, "total TCP packets sent");
       RHD(1, "  data");
       RHD(2, "  data (retransmit)");
       RHD(3, "  ack-only");
       RHD(4, "  window probes");
       RHD(5, "  window updates");
       RHD(6, "  urgent data only");
       RHD(7, "  control");
}

void
showtcpsyn(void)
{

       SHOW(0, 0, TCP_STAT_SC_ADDED);
       SHOW(1, 0, TCP_STAT_SC_COMPLETED);
       SHOW(2, 0, TCP_STAT_SC_TIMED_OUT);
       SHOW(3, 0, TCP_STAT_SC_DUPESYN);
       SHOW(4, 0, TCP_STAT_SC_COLLISIONS);
       SHOW(5, 0, TCP_STAT_SC_RETRANSMITTED);
       SHOW(6, 0, TCP_STAT_SC_ABORTED);
       SHOW(7, 0, TCP_STAT_SC_OVERFLOWED);
       SHOW(8, 0, TCP_STAT_SC_RESET);
       SHOW(9, 0, TCP_STAT_SC_UNREACH);
       SHOW(10, 0, TCP_STAT_SC_BUCKETOVERFLOW);
       SHOW(11, 0, TCP_STAT_SC_DROPPED);
}

void
labeltcpsyn(void)
{

       wmove(wnd, 0, 0); wclrtoeol(wnd);
       LHD(0,  "entries added");
       LHD(1,  "connections completed");
       LHD(2,  "entries timed out");
       LHD(3,  "duplicate SYNs received");
       LHD(4,  "hash collisions");
       LHD(5,  "retransmissions");
       LHD(6,  "entries aborted (no memory)");
       LHD(7,  "dropped (overflow)");
       LHD(8,  "dropped (RST)");
       LHD(9,  "dropped (ICMP UNRCH)");
       LHD(10,  "dropped (bucket overflow)");
       LHD(11,  "dropped (unreachable/no memory)");
}

void
showtcp(void)
{

       SHOW(0, 0, TCP_STAT_CONNATTEMPT);
       SHOW(1, 0, TCP_STAT_ACCEPTS);
       SHOW(2, 0, TCP_STAT_CONNECTS);

       SHOW(4, 0, TCP_STAT_DROPS);
       SHOW(5, 0, TCP_STAT_CONNDROPS);
       SHOW(6, 0, TCP_STAT_TIMEOUTDROP);
       SHOW(7, 0, TCP_STAT_KEEPDROPS);
       SHOW(8, 0, TCP_STAT_PERSISTDROPS);

       SHOW(10, 0, TCP_STAT_SEGSTIMED);
       SHOW(11, 0, TCP_STAT_RTTUPDATED);
       SHOW(12, 0, TCP_STAT_DELACK);
       SHOW(13, 0, TCP_STAT_REXMTTIMEO);
       SHOW(14, 0, TCP_STAT_PERSISTTIMEO);
       SHOW(15, 0, TCP_STAT_KEEPPROBE);
       SHOW(16, 0, TCP_STAT_KEEPTIMEO);

       SHOW(0, 35, TCP_STAT_SNDTOTAL);
       SHOW(1, 35, TCP_STAT_SNDPACK);
       SHOW(2, 35, TCP_STAT_SNDREXMITPACK);

       SHOW(3, 35, TCP_STAT_SNDACKS);
       SHOW(4, 35, TCP_STAT_SNDPROBE);
       SHOW(5, 35, TCP_STAT_SNDWINUP);
       SHOW(6, 35, TCP_STAT_SNDURG);
       SHOW(7, 35, TCP_STAT_SNDCTRL);

       SHOW(9, 35, TCP_STAT_RCVTOTAL);
       SHOW(10, 35, TCP_STAT_RCVPACK);
       SHOW(11, 35, TCP_STAT_RCVDUPPACK);
       SHOW(12, 35, TCP_STAT_RCVPARTDUPPACK);
       SHOW(13, 35, TCP_STAT_RCVOOPACK);
       SHOW(14, 35, TCP_STAT_RCVDUPACK);
       SHOW(15, 35, TCP_STAT_RCVACKPACK);
       SHOW(16, 35, TCP_STAT_RCVWINPROBE);
       SHOW(17, 35, TCP_STAT_RCVWINUPD);
}

int
inittcp(void)
{
       return 1;
}

void
fetchtcp(void)
{
       size_t i, size = sizeof(newstat);

       if (sysctlbyname("net.inet.tcp.stats", newstat, &size, NULL, 0) == -1)
               return;

       for (i = 0; i < TCP_NSTATS; i++)
               xADJINETCTR(curstat, oldstat, newstat, i);

       if (update == UPDATE_TIME)
               memcpy(oldstat, newstat, sizeof(oldstat));
}

void
tcp_boot(char *args)
{

       memset(oldstat, 0, sizeof(oldstat));
       update = UPDATE_BOOT;
}

void
tcp_run(char *args)
{

       if (update != UPDATE_RUN) {
               memcpy(oldstat, newstat, sizeof(oldstat));
               update = UPDATE_RUN;
       }
}

void
tcp_time(char *args)
{

       if (update != UPDATE_TIME) {
               memcpy(oldstat, newstat, sizeof(oldstat));
               update = UPDATE_TIME;
       }
}

void
tcp_zero(char *args)
{

       if (update == UPDATE_RUN)
               memcpy(oldstat, newstat, sizeof(oldstat));
}

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