usr.bin/netstat/unix.c

   1 /*-
   2  * Copyright (c) 1983, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)unix.c   8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/netstat/unix.c,v 1.12.2.2 2001/08/10 09:07:09 ru Exp $
  35  * $DragonFly: src/usr.bin/netstat/unix.c,v 1.4 2005/03/05 13:23:15 hmp Exp $
  36  */
  37
  38 /*
  39  * Display protocol blocks in the unix domain.
  40  */
  41 #include <sys/param.h>
  42 #include <sys/queue.h>
  43 #include <sys/protosw.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/un.h>
  49 #include <sys/unpcb.h>
  50
  51 #include <netinet/in.h>
  52
  53 #include <errno.h>
  54 #include <err.h>
  55 #include <stddef.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <kvm.h>
  59 #include "netstat.h"
  60
  61 static  void unixdomainpr (struct xunpcb *, struct xsocket *);
  62
  63 static  const char *const socktype[] =
  64     { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };
  65
  66 void
  67 unixpr(void)
  68 {
  69         void    *buf;
  70         int     type;
  71         size_t  i, len;
  72         struct  xunpcb *xunp;
  73         char mibvar[sizeof "net.local.seqpacket.pcblist"];
  74
  75         for (type = SOCK_STREAM; type <= SOCK_SEQPACKET; type++) {
  76                 sprintf(mibvar, "net.local.%s.pcblist", socktype[type]);
  77
  78                 len = 0;
  79                 if (sysctlbyname(mibvar, 0, &len, 0, 0) < 0) {
  80                         if (errno != ENOENT)
  81                                 warn("sysctl: %s", mibvar);
  82                         continue;
  83                 }
  84                 if ((buf = malloc(len)) == 0) {
  85                         warn("malloc %lu bytes", (u_long)len);
  86                         return;
  87                 }
  88                 if (sysctlbyname(mibvar, buf, &len, 0, 0) < 0) {
  89                         warn("sysctl: %s", mibvar);
  90                         free(buf);
  91                         return;
  92                 }
  93
  94                 xunp = (struct xunpcb *)buf;
  95                 len /= sizeof(*xunp);
  96                 for (i = 0; i < len; i++) {
  97                         if (xunp[i].xu_len != sizeof(*xunp)) {
  98                                 warnx("sysctl: ABI mismatch");
  99                                 free(buf);
 100                                 return;
 101                         }
 102                         unixdomainpr(&xunp[i], &xunp[i].xu_socket);
 103                 }
 104                 free(buf);
 105         }
 106 }
 107
 108 static void
 109 unixdomainpr(struct xunpcb *xunp, struct xsocket *so)
 110 {
 111         struct unpcb *unp;
 112         struct sockaddr_un *sa;
 113         static int first = 1;
 114
 115         unp = &xunp->xu_unp;
 116         if (unp->unp_addr)
 117                 sa = &xunp->xu_addr;
 118         else
 119                 sa = (struct sockaddr_un *)0;
 120
 121         if (first) {
 122                 printf("Active UNIX domain sockets\n");
 123                 printf(
 124 "%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n",
 125                     "Address", "Type", "Recv-Q", "Send-Q",
 126                     "Inode", "Conn", "Refs", "Nextref");
 127                 first = 0;
 128         }
 129         printf("%8lx %-6.6s %6ld %6ld %8lx %8lx %8lx %8lx",
 130                (long)so->so_pcb, socktype[so->so_type], so->so_rcv.sb_cc,
 131                so->so_snd.sb_cc,
 132                (long)unp->unp_vnode, (long)unp->unp_conn,
 133                (long)LIST_FIRST(&unp->unp_refs), (long)LIST_NEXT(unp, unp_reflink));
 134         if (sa)
 135                 printf(" %.*s",
 136                     (int)(sa->sun_len - offsetof(struct sockaddr_un, sun_path)),
 137                     sa->sun_path);
 138         putchar('\n');
 139 }