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