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freebsd/usr.bin/netstat/netgraph.c
Gleb Smirnoff c1b90938b1 Now fix functionality of 'netstat -f netgraph' that hasn't worked
starting from netgraph import in 1999.

netstat(8) used pointer to node as node address, oops. That didn't
work, we need the node ID in brackets to successfully address a node.
We can't look into ng_node, due to inability to include netgraph/netgraph.h
in userland code. So let the node make a hint for a userland, storing
the node ID in its private data.

MFC after:	2 weeks
2010-03-12 15:04:59 +00:00

192 lines
5.7 KiB
C

/*-
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/linker.h>
#include <net/route.h>
#include <netgraph.h>
#include <netgraph/ng_message.h>
#include <netgraph/ng_socket.h>
#include <netgraph/ng_socketvar.h>
#include <nlist.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include "netstat.h"
static int first = 1;
static int csock = -1;
void
netgraphprotopr(u_long off, const char *name, int af1 __unused,
int proto __unused)
{
struct ngpcb *this, *next;
struct ngpcb ngpcb;
struct ngsock info;
struct socket sockb;
int debug = 1;
/* If symbol not found, try looking in the KLD module */
if (off == 0) {
const char *const modname = "ng_socket.ko";
/* XXX We should get "mpath" from "sysctl kern.module_path" */
const char *mpath[] = { "/", "/boot/", "/modules/", NULL };
struct nlist sym[] = { { .n_name = "_ngsocklist" },
{ .n_name = NULL } };
const char **pre;
struct kld_file_stat ks;
int fileid;
/* Can't do this for core dumps. */
if (!live)
return;
/* See if module is loaded */
if ((fileid = kldfind(modname)) < 0) {
if (debug)
warn("kldfind(%s)", modname);
return;
}
/* Get module info */
memset(&ks, 0, sizeof(ks));
ks.version = sizeof(struct kld_file_stat);
if (kldstat(fileid, &ks) < 0) {
if (debug)
warn("kldstat(%d)", fileid);
return;
}
/* Get symbol table from module file */
for (pre = mpath; *pre; pre++) {
char path[MAXPATHLEN];
snprintf(path, sizeof(path), "%s%s", *pre, modname);
if (nlist(path, sym) == 0)
break;
}
/* Did we find it? */
if (sym[0].n_value == 0) {
if (debug)
warnx("%s not found", modname);
return;
}
/* Symbol found at load address plus symbol offset */
off = (u_long) ks.address + sym[0].n_value;
}
/* Get pointer to first socket */
kread(off, (char *)&this, sizeof(this));
/* Get my own socket node */
if (csock == -1)
NgMkSockNode(NULL, &csock, NULL);
for (; this != NULL; this = next) {
u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)];
struct ng_mesg *resp = (struct ng_mesg *) rbuf;
struct nodeinfo *ni = (struct nodeinfo *) resp->data;
char path[64];
/* Read in ngpcb structure */
kread((u_long)this, (char *)&ngpcb, sizeof(ngpcb));
next = LIST_NEXT(&ngpcb, socks);
/* Read in socket structure */
kread((u_long)ngpcb.ng_socket, (char *)&sockb, sizeof(sockb));
/* Check type of socket */
if (strcmp(name, "ctrl") == 0 && ngpcb.type != NG_CONTROL)
continue;
if (strcmp(name, "data") == 0 && ngpcb.type != NG_DATA)
continue;
/* Do headline */
if (first) {
printf("Netgraph sockets\n");
if (Aflag)
printf("%-8.8s ", "PCB");
printf("%-5.5s %-6.6s %-6.6s %-14.14s %s\n",
"Type", "Recv-Q", "Send-Q",
"Node Address", "#Hooks");
first = 0;
}
/* Show socket */
if (Aflag)
printf("%8lx ", (u_long) this);
printf("%-5.5s %6u %6u ",
name, sockb.so_rcv.sb_cc, sockb.so_snd.sb_cc);
/* Get ngsock structure */
if (ngpcb.sockdata == NULL) /* unconnected data socket */
goto finish;
kread((u_long)ngpcb.sockdata, (char *)&info, sizeof(info));
/* Get info on associated node */
if (info.node_id == 0 || csock == -1)
goto finish;
snprintf(path, sizeof(path), "[%x]:", info.node_id);
if (NgSendMsg(csock, path,
NGM_GENERIC_COOKIE, NGM_NODEINFO, NULL, 0) < 0)
goto finish;
if (NgRecvMsg(csock, resp, sizeof(rbuf), NULL) < 0)
goto finish;
/* Display associated node info */
if (*ni->name != '\0')
snprintf(path, sizeof(path), "%s:", ni->name);
printf("%-14.14s %4d", path, ni->hooks);
finish:
putchar('\n');
}
}