Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
f46f81bd9a
NetBSD/usr.bin/netstat/pfkey.c
ozaki-r 1d675d5a3a netstat: strengthen against kernel changes 
netstat uses sysctlbyname to get counter data from the kernel.
sysctlbyname fails with ENOMEM if actual counter data in the kernel is
larger than a passed buffer.  netstat just skips showing counters of a
category if sysctlbyname fails, so if we added new counters of the
category to the kernel, nestat shows nothing for the category.

Fortunately sysctlbyname fills data as much as possible even if a passed
buffer is short.  So we can allow netstat to show the filled data anyway
if sysctlbyname fails with ENOMEM.

Note that this backcompat mechanism works only if new counters are
appended, and doesn't work if new counters are inserted into the middle
or counters are moved.
2020-08-28 07:23:48 +00:00

183 lines
6.9 KiB
C
Raw Blame History

/* $NetBSD: pfkey.c,v 1.3 2020/08/28 07:23:48 ozaki-r Exp $ */
/* $KAME: ipsec.c,v 1.33 2003/07/25 09:54:32 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON 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 ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON 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 ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94";
#else
#ifdef __NetBSD__
__RCSID("$NetBSD: pfkey.c,v 1.3 2020/08/28 07:23:48 ozaki-r Exp $");
#endif
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#ifdef IPSEC
#include <netipsec/keysock.h>
#endif
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
#include "prog_ops.h"
#ifdef IPSEC
static const char *pfkey_msgtypenames[] = {
"reserved", "getspi", "update", "add", "delete",
"get", "acquire", "register", "expire", "flush",
"dump", "x_promisc", "x_pchange", "x_spdupdate", "x_spdadd",
"x_spddelete", "x_spdget", "x_spdacquire", "x_spddump", "x_spdflush",
"x_spdsetidx", "x_spdexpire", "x_spddelete2"
};
static const char *pfkey_msgtype_names(int);
static const char *
pfkey_msgtype_names(int x)
{
const int max =
sizeof(pfkey_msgtypenames)/sizeof(pfkey_msgtypenames[0]);
static char buf[20];
if (x < max && pfkey_msgtypenames[x])
return pfkey_msgtypenames[x];
snprintf(buf, sizeof(buf), "#%d", x);
return buf;
}
void
pfkey_stats(u_long off, const char *name)
{
uint64_t pfkeystat[PFKEY_NSTATS];
int first, type;
if (use_sysctl) {
size_t size = sizeof(pfkeystat);
if (prog_sysctlbyname("net.key.stats", pfkeystat, &size,
NULL, 0) == -1 && errno != ENOMEM)
return;
} else {
warnx("%s stats not available via KVM.", name);
return;
}
printf ("%s:\n", name);
#define p(f, m) if (pfkeystat[f] || sflag <= 1) \
printf(m, (unsigned long long)pfkeystat[f], plural(pfkeystat[f]))
/* userland -> kernel */
p(PFKEY_STAT_OUT_TOTAL, "\t%llu request%s sent from userland\n");
p(PFKEY_STAT_OUT_BYTES, "\t%llu byte%s sent from userland\n");
for (first = 1, type = 0; type < 256; type++) {
if (pfkeystat[PFKEY_STAT_OUT_MSGTYPE + type] == 0)
continue;
if (first) {
printf("\thistogram by message type:\n");
first = 0;
}
printf("\t\t%s: %llu\n", pfkey_msgtype_names(type),
(unsigned long long)pfkeystat[PFKEY_STAT_OUT_MSGTYPE + type]);
}
p(PFKEY_STAT_OUT_INVLEN, "\t%llu message%s with invalid length field\n");
p(PFKEY_STAT_OUT_INVVER, "\t%llu message%s with invalid version field\n");
p(PFKEY_STAT_OUT_INVMSGTYPE, "\t%llu message%s with invalid message type field\n");
p(PFKEY_STAT_OUT_TOOSHORT, "\t%llu message%s too short\n");
p(PFKEY_STAT_OUT_NOMEM, "\t%llu message%s with memory allocation failure\n");
p(PFKEY_STAT_OUT_DUPEXT, "\t%llu message%s with duplicate extension\n");
p(PFKEY_STAT_OUT_INVEXTTYPE, "\t%llu message%s with invalid extension type\n");
p(PFKEY_STAT_OUT_INVSATYPE, "\t%llu message%s with invalid sa type\n");
p(PFKEY_STAT_OUT_INVADDR, "\t%llu message%s with invalid address extension\n");
/* kernel -> userland */
p(PFKEY_STAT_IN_TOTAL, "\t%llu request%s sent to userland\n");
p(PFKEY_STAT_IN_BYTES, "\t%llu byte%s sent to userland\n");
for (first = 1, type = 0; type < 256; type++) {
if (pfkeystat[PFKEY_STAT_IN_MSGTYPE + type] == 0)
continue;
if (first) {
printf("\thistogram by message type:\n");
first = 0;
}
printf("\t\t%s: %llu\n", pfkey_msgtype_names(type),
(unsigned long long)pfkeystat[PFKEY_STAT_IN_MSGTYPE + type]);
}
p(PFKEY_STAT_IN_MSGTARGET + KEY_SENDUP_ONE,
"\t%llu message%s toward single socket\n");
p(PFKEY_STAT_IN_MSGTARGET + KEY_SENDUP_ALL,
"\t%llu message%s toward all sockets\n");
p(PFKEY_STAT_IN_MSGTARGET + KEY_SENDUP_REGISTERED,
"\t%llu message%s toward registered sockets\n");
p(PFKEY_STAT_IN_NOMEM, "\t%llu message%s with memory allocation failure\n");
#undef p
}
#endif /*IPSEC*/
Reference in New Issue View Git Blame Copy Permalink