usr.bin/netstat/netgraph.c

   1 /*
   2  * Copyright (c) 1996-1999 Whistle Communications, Inc.
   3  * All rights reserved.
   4  *
   5  * Subject to the following obligations and disclaimer of warranty, use and
   6  * redistribution of this software, in source or object code forms, with or
   7  * without modifications are expressly permitted by Whistle Communications;
   8  * provided, however, that:
   9  * 1. Any and all reproductions of the source or object code must include the
  10  *    copyright notice above and the following disclaimer of warranties; and
  11  * 2. No rights are granted, in any manner or form, to use Whistle
  12  *    Communications, Inc. trademarks, including the mark "WHISTLE
  13  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
  14  *    such appears in the above copyright notice or in the software.
  15  *
  16  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
  17  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
  18  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
  19  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
  21  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
  22  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
  23  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
  24  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
  25  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
  26  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  27  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
  28  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
  32  * OF SUCH DAMAGE.
  33  *
  34  * $FreeBSD: src/usr.bin/netstat/netgraph.c,v 1.3.2.2 2001/08/10 09:07:09 ru Exp $
  35  * $DragonFly: src/usr.bin/netstat/netgraph.c,v 1.6 2008/09/02 11:50:46 matthias Exp $
  36  *
  37  * $Id: atalk.c,v 1.11 1998/07/06 21:01:22 bde Exp $
  38  */
  39
  40 #define _KERNEL_STRUCTURES
  41 #include <sys/param.h>
  42 #include <sys/queue.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/protosw.h>
  46 #include <sys/linker.h>
  47
  48 #include <net/route.h>
  49
  50 #include <netgraph.h>
  51 #include <netgraph/ng_message.h>
  52 #include <netgraph/socket/ng_socket.h>
  53 #include <netgraph/socket/ng_socketvar.h>
  54
  55 #include <nlist.h>
  56 #include <errno.h>
  57 #include <stdio.h>
  58 #include <string.h>
  59 #include <unistd.h>
  60 #include <err.h>
  61 #include "netstat.h"
  62
  63 static  int first = 1;
  64 static  int csock = -1;
  65
  66 void
  67 netgraphprotopr(u_long off, const char *name, int af1 __unused)
  68 {
  69         struct ngpcb *this, *next;
  70         struct ngpcb ngpcb;
  71         struct ngsock info;
  72         struct socket sockb;
  73         int debug = 1;
  74
  75         /* If symbol not found, try looking in the KLD module */
  76         if (off == 0) {
  77                 const char *const modname = "ng_socket.ko";
  78 /* XXX We should get "mpath" from "sysctl kern.module_path" */
  79                 const char *mpath[] = { "/", "/boot/", "/boot/modules/", NULL };
  80                 struct nlist sym[] = { { .n_name = "_ngsocklist" },
  81                                        { .n_name = NULL } };
  82                 const char **pre;
  83                 struct kld_file_stat ks;
  84                 int fileid;
  85
  86                 /* See if module is loaded */
  87                 if ((fileid = kldfind(modname)) < 0) {
  88                         if (debug)
  89                                 warn("kldfind(%s)", modname);
  90                         return;
  91                 }
  92
  93                 /* Get module info */
  94                 memset(&ks, 0, sizeof(ks));
  95                 ks.version = sizeof(struct kld_file_stat);
  96                 if (kldstat(fileid, &ks) < 0) {
  97                         if (debug)
  98                                 warn("kldstat(%d)", fileid);
  99                         return;
 100                 }
 101
 102                 /* Get symbol table from module file */
 103                 for (pre = mpath; *pre; pre++) {
 104                         char path[MAXPATHLEN];
 105
 106                         snprintf(path, sizeof(path), "%s%s", *pre, modname);
 107                         if (nlist(path, sym) == 0)
 108                                 break;
 109                 }
 110
 111                 /* Did we find it? */
 112                 if (sym[0].n_value == 0) {
 113                         if (debug)
 114                                 warnx("%s not found", modname);
 115                         return;
 116                 }
 117
 118                 /* Symbol found at load address plus symbol offset */
 119                 off = (u_long) ks.address + sym[0].n_value;
 120         }
 121
 122         /* Get pointer to first socket */
 123         kread(off, (char *)&this, sizeof(this));
 124
 125         /* Get my own socket node */
 126         if (csock == -1)
 127                 NgMkSockNode(NULL, &csock, NULL);
 128
 129         for (; this != NULL; this = next) {
 130                 u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)];
 131                 struct ng_mesg *resp = (struct ng_mesg *) rbuf;
 132                 struct nodeinfo *ni = (struct nodeinfo *) resp->data;
 133                 char path[64];
 134
 135                 /* Read in ngpcb structure */
 136                 kread((u_long)this, (char *)&ngpcb, sizeof(ngpcb));
 137                 next = LIST_NEXT(&ngpcb, socks);
 138
 139                 /* Read in socket structure */
 140                 kread((u_long)ngpcb.ng_socket, (char *)&sockb, sizeof(sockb));
 141
 142                 /* Check type of socket */
 143                 if (strcmp(name, "ctrl") == 0 && ngpcb.type != NG_CONTROL)
 144                         continue;
 145                 if (strcmp(name, "data") == 0 && ngpcb.type != NG_DATA)
 146                         continue;
 147
 148                 /* Do headline */
 149                 if (first) {
 150                         printf("Netgraph sockets\n");
 151                         if (Aflag)
 152                                 printf("%-8.8s ", "PCB");
 153                         printf("%-5.5s %-6.6s %-6.6s %-14.14s %s\n",
 154                             "Type", "Recv-Q", "Send-Q",
 155                             "Node Address", "#Hooks");
 156                         first = 0;
 157                 }
 158
 159                 /* Show socket */
 160                 if (Aflag)
 161                         printf("%8lx ", (u_long) this);
 162                 printf("%-5.5s %6lu %6lu ",
 163                     name, sockb.so_rcv.ssb_cc, sockb.so_snd.ssb_cc);
 164
 165                 /* Get ngsock structure */
 166                 if (ngpcb.sockdata == 0)        /* unconnected data socket */
 167                         goto finish;
 168                 kread((u_long)ngpcb.sockdata, (char *)&info, sizeof(info));
 169
 170                 /* Get info on associated node */
 171                 if (info.node == 0 || csock == -1)
 172                         goto finish;
 173                 snprintf(path, sizeof(path), "[%lx]:", (u_long) info.node);
 174                 if (NgSendMsg(csock, path,
 175                     NGM_GENERIC_COOKIE, NGM_NODEINFO, NULL, 0) < 0)
 176                         goto finish;
 177                 if (NgRecvMsg(csock, resp, sizeof(rbuf), NULL) < 0)
 178                         goto finish;
 179
 180                 /* Display associated node info */
 181                 if (*ni->name != '\0')
 182                         snprintf(path, sizeof(path), "%s:", ni->name);
 183                 printf("%-14.14s %4d", path, ni->hooks);
 184 finish:
 185                 putchar('\n');
 186         }
 187 }
 188