usr.bin/netstat/unix.c

   1 /*      $NetBSD: unix.c,v 1.28 2008/02/27 16:36:54 ad 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 1.28 2008/02/27 16:36:54 ad 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 struct uio;
  57 struct proc;
  58 #include <sys/file.h>
  59
  60 #include <netinet/in.h>
  61
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <kvm.h>
  66 #include <err.h>
  67 #include "netstat.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 extern  kvm_t *kvmd;
  77
  78 static void
  79 unixdomainprhdr(void)
  80 {
  81         printf("Active UNIX domain sockets\n");
  82         printf("%-8.8s %-6.6s %-6.6s %-6.6s %8.8s %8.8s %8.8s %8.8s Addr\n",
  83                "Address", "Type", "Recv-Q", "Send-Q", "Inode", "Conn", "Refs",
  84                "Nextref");
  85 }
  86
  87 static  const char *socktype[] =
  88     { "#0", "stream", "dgram", "raw", "rdm", "seqpacket" };
  89
  90 static void
  91 unixdomainpr0(u_long so_pcb, u_long so_type, u_long rcvq, u_long sndq,
  92               u_long inode, u_long conn, u_long refs, u_long nextref,
  93               u_long addr, struct sockaddr_un *sun, int remote)
  94 {
  95         printf("%8lx %-6.6s %6ld %6ld %8lx %8lx %8lx %8lx",
  96                so_pcb, socktype[so_type], rcvq, sndq, inode, conn, refs,
  97                nextref);
  98         if (addr || remote)
  99                 printf((remote ? " -> %.*s" : " %.*s"),
 100                        (int)(sun->sun_len - (sizeof(*sun) - sizeof(sun->sun_path))),
 101                        sun->sun_path);
 102         putchar('\n');
 103 }
 104
 105 static void
 106 unixdomainpr(so, soaddr)
 107         struct socket *so;
 108         void *soaddr;
 109 {
 110         struct unpcb unp, runp;
 111         struct sockaddr_un sun, rsun;
 112         static int first = 1;
 113         int remote = 0;
 114
 115         if (kread((u_long)so->so_pcb, (char *)&unp, sizeof (unp)))
 116                 return;
 117         if (unp.unp_addr)
 118                 if (kread((u_long)unp.unp_addr, (char *)&sun, sizeof (sun)))
 119                         unp.unp_addr = 0;
 120
 121         if (!unp.unp_addr) {
 122                 memset(&rsun, 0, sizeof(rsun));
 123                 if (unp.unp_conn &&
 124                     kread((u_long)unp.unp_conn, (char *)&runp, sizeof (runp)) == 0 &&
 125                     runp.unp_addr &&
 126                     kread((u_long)runp.unp_addr, (char *)&rsun, sizeof (rsun)) == 0 &&
 127                     rsun.sun_path[0] != '\0')
 128                         remote = 1;
 129         }
 130
 131         if (first) {
 132                 unixdomainprhdr();
 133                 first = 0;
 134         }
 135
 136         unixdomainpr0((u_long)so->so_pcb, so->so_type, so->so_rcv.sb_cc,
 137                       so->so_snd.sb_cc, (u_long)unp.unp_vnode,
 138                       (u_long)unp.unp_conn, (u_long)unp.unp_refs,
 139                       (u_long)unp.unp_nextref, (u_long)unp.unp_addr,
 140                       remote ? &rsun : &sun, remote);
 141 }
 142
 143 void
 144 unixpr(off)
 145         u_long  off;
 146 {
 147         struct file *fp;
 148         struct socket sock, *so = &sock;
 149         char *filebuf;
 150         struct protosw *unixsw = (struct protosw *)off;
 151
 152         if (use_sysctl) {
 153                 struct kinfo_pcb *pcblist;
 154                 int mib[8];
 155                 size_t namelen = 0, size = 0, i;
 156                 const char *mibname = "net.local.stream.pcblist";
 157                 static int first = 1;
 158                 int done = 0;
 159
 160  again:
 161                 memset(mib, 0, sizeof(mib));
 162
 163                 if (sysctlnametomib(mibname, mib,
 164                                     &namelen) == -1)
 165                         err(1, "sysctlnametomib: %s", mibname);
 166
 167                 if (sysctl(mib, sizeof(mib) / sizeof(*mib), NULL, &size,
 168                            NULL, 0) == -1)
 169                         err(1, "sysctl (query)");
 170
 171                 if ((pcblist = malloc(size)) == NULL)
 172                         err(1, "malloc");
 173                 memset(pcblist, 0, size);
 174
 175                 mib[6] = sizeof(*pcblist);
 176                 mib[7] = size / sizeof(*pcblist);
 177
 178                 if (sysctl(mib, sizeof(mib) / sizeof(*mib), pcblist,
 179                            &size, NULL, 0) == -1)
 180                         err(1, "sysctl (copy)");
 181
 182                 for (i = 0; i < size / sizeof(*pcblist); i++) {
 183                         struct kinfo_pcb *ki = &pcblist[i];
 184                         struct sockaddr_un *sun;
 185                         int remote = 0;
 186
 187                         if (first) {
 188                                 unixdomainprhdr();
 189                                 first = 0;
 190                         }
 191
 192                         sun = (struct sockaddr_un *)&ki->ki_dst;
 193                         if (sun->sun_path[0] != '\0') {
 194                                 remote = 1;
 195                         } else {
 196                                 sun = (struct sockaddr_un *)&ki->ki_src;
 197                         }
 198
 199                         unixdomainpr0(ki->ki_pcbaddr, ki->ki_type,
 200                                       ki->ki_rcvq, ki->ki_sndq,
 201                                       ki->ki_vnode, ki->ki_conn, ki->ki_refs,
 202                                       ki->ki_nextref, ki->ki_sockaddr, sun, remote);
 203                 }
 204
 205                 free(pcblist);
 206
 207                 if (!done && mibname) {
 208                         mibname = "net.local.dgram.pcblist";
 209                         done = 1;
 210                         goto again;
 211                 }
 212         } else {
 213                 filebuf = (char *)kvm_getfiles(kvmd, KERN_FILE, 0, &ns_nfiles);
 214                 if (filebuf == 0) {
 215                         printf("file table read error: %s", kvm_geterr(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 }