usr.bin/netstat/unix.c

   1 /*      $NetBSD: unix.c,v 1.34 2012/03/20 20:34:58 matt Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1983, 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "from: @(#)unix.c        8.1 (Berkeley) 6/6/93";
  36 #else
  37 __RCSID("$NetBSD: unix.c,v 1.34 2012/03/20 20:34:58 matt Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 /*
  42  * Display protocol blocks in the unix domain.
  43  */
  44 #define _KERNEL
  45 #include <sys/types.h>
  46 #undef _KERNEL
  47 #include <sys/param.h>
  48 #include <sys/protosw.h>
  49 #include <sys/socket.h>
  50 #include <sys/socketvar.h>
  51 #include <sys/mbuf.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/un.h>
  54 #include <sys/unpcb.h>
  55 #define _KERNEL
  56 #include <sys/file.h>
  57 #undef _KERNEL
  58
  59 #include <netinet/in.h>
  60
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #include <kvm.h>
  65 #include <err.h>
  66 #include "netstat.h"
  67 #include "prog_ops.h"
  68
  69 static  void unixdomainprhdr(void);
  70 static  void unixdomainpr0(u_long, u_long, u_long, u_long, u_long, u_long,
  71                            u_long, u_long, u_long, struct sockaddr_un *, int);
  72 static  void unixdomainpr(struct socket *, void *);
  73
  74 static struct   file *file, *fileNFILE;
  75 static int      ns_nfiles;
  76
  77 static void
  78 unixdomainprhdr(void)
  79 {
  80         printf("Active UNIX domain sockets\n");
  81         printf("%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n",
  82                "Address", "Type", "Recv-Q", "Send-Q", "Inode", "Conn", "Refs",
  83                "Nextref");
  84 }
  85
  86 static  const char * const socktype[] =
  87     { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };
  88
  89 static void
  90 unixdomainpr0(u_long so_pcb, u_long so_type, u_long rcvq, u_long sndq,
  91               u_long inode, u_long conn, u_long refs, u_long nextref,
  92               u_long addr, struct sockaddr_un *sun, int remote)
  93 {
  94         printf("%8lx %-6.6s %6ld %6ld %8lx %8lx %8lx %8lx",
  95                so_pcb, socktype[so_type], rcvq, sndq, inode, conn, refs,
  96                nextref);
  97         if (addr || remote)
  98                 printf((remote ? " -> %.*s" : " %.*s"),
  99                        (int)(sun->sun_len - (sizeof(*sun) - sizeof(sun->sun_path))),
 100                        sun->sun_path);
 101         putchar('\n');
 102 }
 103
 104 static void
 105 unixdomainpr(struct socket *so, void *soaddr)
 106 {
 107         struct unpcb unp, runp;
 108         struct sockaddr_un sun, rsun;
 109         static int first = 1;
 110         int remote = 0;
 111
 112         if (kread((u_long)so->so_pcb, (char *)&unp, sizeof (unp)))
 113                 return;
 114         if (unp.unp_addr)
 115                 if (kread((u_long)unp.unp_addr, (char *)&sun, sizeof (sun)))
 116                         unp.unp_addr = 0;
 117
 118         if (!unp.unp_addr) {
 119                 memset(&rsun, 0, sizeof(rsun));
 120                 if (unp.unp_conn &&
 121                     kread((u_long)unp.unp_conn, (char *)&runp, sizeof (runp)) == 0 &&
 122                     runp.unp_addr &&
 123                     kread((u_long)runp.unp_addr, (char *)&rsun, sizeof (rsun)) == 0 &&
 124                     rsun.sun_path[0] != '\0')
 125                         remote = 1;
 126         }
 127
 128         if (first) {
 129                 unixdomainprhdr();
 130                 first = 0;
 131         }
 132
 133         unixdomainpr0((u_long)so->so_pcb, so->so_type, so->so_rcv.sb_cc,
 134                       so->so_snd.sb_cc, (u_long)unp.unp_vnode,
 135                       (u_long)unp.unp_conn, (u_long)unp.unp_refs,
 136                       (u_long)unp.unp_nextref, (u_long)unp.unp_addr,
 137                       remote ? &rsun : &sun, remote);
 138 }
 139
 140 void
 141 unixpr(u_long off)
 142 {
 143         struct file *fp;
 144         struct socket sock, *so = &sock;
 145         char *filebuf;
 146         struct protosw *unixsw = (struct protosw *)off;
 147
 148         if (use_sysctl) {
 149                 struct kinfo_pcb *pcblist;
 150                 int mib[8];
 151                 size_t namelen = 0, size = 0, i;
 152                 const char *mibnames[] = {
 153                         "net.local.stream.pcblist",
 154                         "net.local.dgram.pcblist",
 155                         "net.local.seqpacket.pcblist",
 156                         NULL,
 157                 };
 158                 const char **mibname;
 159                 static int first = 1;
 160
 161                 for (mibname = mibnames; *mibname; mibname++) {
 162                         memset(mib, 0, sizeof(mib));
 163
 164                         if (sysctlnametomib(*mibname, mib,
 165                                             &namelen) == -1)
 166                                 err(1, "sysctlnametomib: %s", *mibname);
 167
 168                         if (prog_sysctl(mib, sizeof(mib) / sizeof(*mib),
 169                             NULL, &size, NULL, 0) == -1)
 170                                 err(1, "sysctl (query)");
 171
 172                         if ((pcblist = malloc(size)) == NULL)
 173                                 err(1, "malloc");
 174                         memset(pcblist, 0, size);
 175
 176                         mib[6] = sizeof(*pcblist);
 177                         mib[7] = size / sizeof(*pcblist);
 178
 179                         if (prog_sysctl(mib, sizeof(mib) / sizeof(*mib),
 180                                         pcblist, &size, NULL, 0) == -1)
 181                                 err(1, "sysctl (copy)");
 182
 183                         for (i = 0; i < size / sizeof(*pcblist); i++) {
 184                                 struct kinfo_pcb *ki = &pcblist[i];
 185                                 struct sockaddr_un *sun;
 186                                 int remote = 0;
 187
 188                                 if (first) {
 189                                         unixdomainprhdr();
 190                                         first = 0;
 191                                 }
 192
 193                                 sun = (struct sockaddr_un *)&ki->ki_dst;
 194                                 if (sun->sun_path[0] != '\0') {
 195                                         remote = 1;
 196                                 } else {
 197                                         sun = (struct sockaddr_un *)&ki->ki_src;
 198                                 }
 199
 200                                 unixdomainpr0(ki->ki_pcbaddr, ki->ki_type,
 201                                               ki->ki_rcvq, ki->ki_sndq,
 202                                               ki->ki_vnode, ki->ki_conn,
 203                                               ki->ki_refs, ki->ki_nextref,
 204                                               ki->ki_sockaddr, sun, remote);
 205                         }
 206
 207                         free(pcblist);
 208                 }
 209
 210         } else {
 211                 filebuf = (char *)kvm_getfiles(get_kvmd(), KERN_FILE,
 212                                                0, &ns_nfiles);
 213                 if (filebuf == 0) {
 214                         printf("file table read error: %s",
 215                                kvm_geterr(get_kvmd()));
 216                         return;
 217                 }
 218                 file = (struct file *)(filebuf + sizeof(fp));
 219                 fileNFILE = file + ns_nfiles;
 220                 for (fp = file; fp < fileNFILE; fp++) {
 221                         if (fp->f_count == 0 || fp->f_type != DTYPE_SOCKET)
 222                                 continue;
 223                         if (kread((u_long)fp->f_data, (char *)so, sizeof (*so)))
 224                                 continue;
 225                         /* kludge */
 226                         if (so->so_proto >= unixsw && so->so_proto <= unixsw + 2)
 227                                 if (so->so_pcb)
 228                                         unixdomainpr(so, fp->f_data);
 229                 }
 230         }
 231 }