/*-
 * 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.
 * 3. 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.
 *
 * @(#)mbufs.c  8.1 (Berkeley) 6/6/93
 * $FreeBSD: src/usr.bin/systat/mbufs.c,v 1.10.2.1 2000/08/26 09:36:55 ps Exp $
 */

#define _KERNEL_STRUCTURES
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include "systat.h"
#include "extern.h"

static struct mbstat *mb;
static u_long *m_mbtypes;
static int nmbtypes;

static struct mtnames {
        int mt_type;
        const char *mt_name;
} mtnames[] = {
        { MT_DATA,      "data"},
        { MT_HEADER,    "headers"},
        { MT_SONAME,    "socknames"},
        { MT_CONTROL,   "control"},
        { MT_OOBDATA,   "oobdata"}
};

#define NNAMES  NELEM(mtnames)

WINDOW *
openmbufs(void)
{
        return (subwin(stdscr, LINES-5-1, 0, 5, 0));
}

void
closembufs(WINDOW *w)
{
        if (w == NULL)
                return;
        wclear(w);
        wrefresh(w);
        delwin(w);
}

void
labelmbufs(void)
{
        wmove(wnd, 0, 0); wclrtoeol(wnd);
        mvwaddstr(wnd, 0, 10,
            "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
}

void
showmbufs(void)
{
        int i, j, idx;
        u_long max;
        char buf[10];
        const char *mtname;

        if (mb == NULL)
                return;
        for (j = 0; j < wnd->_maxy; j++) {
                max = 0, idx = -1;
                for (i = 0; i < wnd->_maxy; i++) {
                        if (i == MT_FREE)
                                continue;
                        if (i >= nmbtypes)
                                break;
                        if (m_mbtypes[i] > max) {
                                max = m_mbtypes[i];
                                idx = i;
                        }
                }
                if (max == 0)
                        break;

                mtname = NULL;
                for (i = 0; i < (int)NNAMES; i++)
                        if (mtnames[i].mt_type == idx)
                                mtname = mtnames[i].mt_name;
                if (mtname == NULL)
                        mvwprintw(wnd, 1+j, 0, "%10d", idx);
                else
                        mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
                wmove(wnd, 1 + j, 10);
                if (max > 60) {
                        snprintf(buf, sizeof(buf), " %lu", max);
                        max = 60;
                        while (max--)
                                waddch(wnd, 'X');
                        waddstr(wnd, buf);
                } else
                        while (max--)
                                waddch(wnd, 'X');
                wclrtoeol(wnd);
                mb->m_mbufs -= m_mbtypes[idx];
                m_mbtypes[idx] = 0;
        }
        if (mb->m_mbufs) {
                mvwprintw(wnd, 1+j, 0, "%-10.10s", "free");
                if (mb->m_mbufs > 60) {
                        snprintf(buf, sizeof(buf), " %ld", mb->m_mbufs);
                        mb->m_mbufs = 60;
                        while (mb->m_mbufs--)
                                waddch(wnd, 'X');
                        waddstr(wnd, buf);
                } else {
                        while(mb->m_mbufs--)
                                waddch(wnd, 'X');
                }
                wclrtoeol(wnd);
                j++;
        }
        wmove(wnd, 1+j, 0); wclrtobot(wnd);
}

int
initmbufs(void)
{
        size_t len, mbtypeslen;

        if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
                error("sysctl getting mbtypes size failed");
                return 0;
        }
        if ((m_mbtypes = calloc(1, mbtypeslen)) == NULL) {
                error("calloc mbtypes failed");
                return 0;
        }
        nmbtypes = mbtypeslen / sizeof(*m_mbtypes);

        len = 0;
        if (sysctlbyname("kern.ipc.mbstat", 0, &len, 0, 0) < 0) {
                error("sysctl getting mbstat size failed");
                return 0;
        }

        if (mb == NULL)
                mb = (struct mbstat *)calloc(1, sizeof *mb);
        return 1;
}

void
fetchmbufs(void)
{
        size_t len;

        len = sizeof *mb;
        if (sysctlbyname("kern.ipc.mbstat", mb, &len, 0, 0) < 0)
                printw("sysctl: mbstat: %s", strerror(errno));

        len = nmbtypes * sizeof *m_mbtypes;
        if (sysctlbyname("kern.ipc.mbtypes", m_mbtypes, &len, 0, 0) < 0)
                printw("sysctl: mbtypes: %s", strerror(errno));
}