/*-
 * Copyright (c) 1983, 1988, 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.
 *
 * @(#)unix.c   8.1 (Berkeley) 6/6/93
 * $FreeBSD: src/usr.bin/netstat/unix.c,v 1.12.2.2 2001/08/10 09:07:09 ru Exp $
 */

/*
 * Display protocol blocks in the unix domain.
 */
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <sys/unpcb.h>

#include <netinet/in.h>

#include <errno.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <kvm.h>
#include "netstat.h"

static  void unixdomainpr (struct xunpcb *, struct xsocket *);

static  const char *const socktype[] =
    { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };

void
unixpr(void)
{
        void    *buf;
        int     type;
        size_t  i, len;
        struct  xunpcb *xunp;
        char mibvar[sizeof "net.local.seqpacket.pcblist"];

        for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) {
                sprintf(mibvar, "net.local.%s.pcblist", socktype[type]);

                len = 0;
                if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
                        if (errno != ENOENT)
                                warn("sysctl: %s", mibvar);
                        continue;
                }
                if ((buf = malloc(len)) == NULL) {
                        warn("malloc %lu bytes", (u_long)len);
                        return;
                }
                if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
                        warn("sysctl: %s", mibvar);
                        free(buf);
                        return;
                }

                xunp = (struct xunpcb *)buf;
                len /= sizeof(*xunp);
                for (i = 0; i < len; i++) {
                        if (xunp[i].xu_len != sizeof(*xunp)) {
                                warnx("sysctl: ABI mismatch");
                                free(buf);
                                return;
                        }
                        unixdomainpr(&xunp[i], &xunp[i].xu_socket);
                }
                free(buf);
        }
}

static void
unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
{
        struct unpcb *unp;
        struct sockaddr_un *sa;
        static int first = 1;

        unp = &xunp->xu_unp;
        if (unp->unp_addr)
                sa = &xunp->xu_addr;
        else
                sa = NULL;

        if (first) {
                printf("Active UNIX domain sockets\n");
                printf(
"%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n",
                    "Address", "Type", "Recv-Q", "Send-Q",
                    "Inode", "Conn", "Refs", "Nextref");
                first = 0;
        }
        printf("%8lx %-6.6s %6ld %6ld %8lx %8lx %8lx %8lx",
               (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc,
               so->so_snd.sb_cc,
               (long)unp->unp_vnode, (long)unp->unp_conn,
               (long)LIST_FIRST(&unp->unp_refs), (long)LIST_NEXT(unp, unp_reflink));
        if (sa)
                printf(" %.*s",
                    (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)),
                    sa->sun_path);
        putchar('\n');
}