1d675d5a3a
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.
315 lines
8.3 KiB
C
315 lines
8.3 KiB
C
/* $NetBSD: atalk.c,v 1.19 2020/08/28 07:23:48 ozaki-r Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "from @(#)atalk.c 1.1 (Whistle) 6/6/96";
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#else
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__RCSID("$NetBSD: atalk.c,v 1.19 2020/08/28 07:23:48 ozaki-r Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/sysctl.h>
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#include <net/route.h>
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#include <net/if.h>
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#include <netinet/tcp_fsm.h>
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#include <netatalk/at.h>
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#include <netatalk/ddp_var.h>
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#include <err.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "netstat.h"
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#include "prog_ops.h"
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static int first = 1;
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/*
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* Print a summary of connections related to a Network Systems
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* protocol. For XXX, also give state of connection.
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* Listening processes (aflag) are suppressed unless the
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* -a (all) flag is specified.
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*/
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static const char *
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at_pr_net(const struct sockaddr_at *sat, int numeric)
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{
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static char mybuf[50];
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if (!numeric) {
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switch (sat->sat_addr.s_net) {
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case 0xffff:
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return "????";
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case ATADDR_ANYNET:
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return ("*");
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}
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}
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(void)snprintf(mybuf, sizeof(mybuf), "%hu", ntohs(sat->sat_addr.s_net));
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return (mybuf);
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}
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static const char *
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at_pr_host(const struct sockaddr_at *sat, int numeric)
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{
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static char mybuf[50];
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if (!numeric) {
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switch (sat->sat_addr.s_node) {
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case ATADDR_BCAST:
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return "bcast";
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case ATADDR_ANYNODE:
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return ("*");
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}
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}
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(void)snprintf(mybuf, sizeof(mybuf), "%d",
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(unsigned int)sat->sat_addr.s_node);
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return (mybuf);
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}
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static const char *
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at_pr_port(const struct sockaddr_at *sat)
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{
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static char mybuf[50];
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switch (sat->sat_port) {
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case ATADDR_ANYPORT:
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return ("*");
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case 0xff:
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return "????";
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default:
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(void)snprintf(mybuf, sizeof(mybuf), "%d",
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(unsigned int)sat->sat_port);
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return (mybuf);
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}
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}
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static const char *
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at_pr_range(const struct sockaddr_at *sat)
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{
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static char mybuf[50];
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if (sat->sat_range.r_netrange.nr_firstnet
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!= sat->sat_range.r_netrange.nr_lastnet) {
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(void)snprintf(mybuf, sizeof(mybuf), "%d-%d",
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ntohs(sat->sat_range.r_netrange.nr_firstnet),
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ntohs(sat->sat_range.r_netrange.nr_lastnet));
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} else {
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(void)snprintf(mybuf, sizeof(mybuf), "%d",
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ntohs(sat->sat_range.r_netrange.nr_firstnet));
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}
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return (mybuf);
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}
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/* what == 0 for addr only == 3
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* 1 for net
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* 2 for host
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* 4 for port
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* 8 for numeric only
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*/
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const char *
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atalk_print(const struct sockaddr *sa, int what)
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{
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const struct sockaddr_at *sat = (const struct sockaddr_at *) sa;
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static char mybuf[50];
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int numeric = (what & 0x08);
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mybuf[0] = 0;
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switch (what & 0x13) {
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case 0:
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mybuf[0] = 0;
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break;
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case 1:
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(void)snprintf(mybuf, sizeof(mybuf), "%s",
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at_pr_net(sat, numeric));
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break;
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case 2:
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(void)snprintf(mybuf, sizeof(mybuf), "%s",
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at_pr_host(sat, numeric));
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break;
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case 3:
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(void)snprintf(mybuf, sizeof(mybuf), "%s.%s",
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at_pr_net(sat, numeric),
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at_pr_host(sat, numeric));
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break;
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case 0x10:
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(void)snprintf(mybuf, sizeof(mybuf), "%s", at_pr_range(sat));
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}
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if (what & 4) {
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(void)snprintf(mybuf + strlen(mybuf),
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sizeof(mybuf) - strlen(mybuf), ".%s", at_pr_port(sat));
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}
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return (mybuf);
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}
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const char *
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atalk_print2(const struct sockaddr *sa, const struct sockaddr *mask, int what)
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{
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int n, l;
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static char buf[100];
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const struct sockaddr_at *sat1, *sat2;
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struct sockaddr_at thesockaddr;
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struct sockaddr *sa2;
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sat1 = (const struct sockaddr_at *) sa;
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sat2 = (const struct sockaddr_at *) mask;
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sa2 = (struct sockaddr *) & thesockaddr;
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thesockaddr.sat_addr.s_net = sat1->sat_addr.s_net &
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sat2->sat_addr.s_net;
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n = snprintf(buf, sizeof(buf), "%s", atalk_print(sa2, 1 | (what & 8)));
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if (n >= (int)sizeof(buf))
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n = sizeof(buf) - 1;
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else if (n == -1)
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n = 0; /* What else can be done ? */
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if (sat2->sat_addr.s_net != 0xFFFF) {
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thesockaddr.sat_addr.s_net = sat1->sat_addr.s_net |
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~sat2->sat_addr.s_net;
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l = snprintf(buf + n, sizeof(buf) - n,
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"-%s", atalk_print(sa2, 1 | (what & 8)));
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if (l >= (int)(sizeof(buf) - n))
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l = sizeof(buf) - n - 1;
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if (l > 0)
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n += l;
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}
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if (what & 2) {
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l = snprintf(buf + n, sizeof(buf) - n, ".%s",
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atalk_print(sa, what & (~1)));
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if (l >= (int)(sizeof(buf) - n))
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l = sizeof(buf) - n - 1;
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if (l > 0)
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n += l;
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}
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return (buf);
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}
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void
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atalkprotopr(u_long off, const char *name)
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{
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struct ddpcb ddpcb;
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struct socket sockb;
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struct ddpcb *next;
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struct ddpcb *initial;
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int width = 22;
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if (off == 0)
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return;
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if (kread(off, (char *)&initial, sizeof(struct ddpcb *)) < 0)
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return;
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for (next = initial; next != NULL;) {
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u_long ppcb = (u_long)next;
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if (kread((u_long)next, (char *)&ddpcb, sizeof(ddpcb)) < 0)
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return;
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next = ddpcb.ddp_next;
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#if 0
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if (!aflag && atalk_nullhost(ddpcb.ddp_lsat)) {
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continue;
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}
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#endif
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if (kread((u_long)ddpcb.ddp_socket,
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(char *)&sockb, sizeof(sockb)) < 0)
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return;
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if (first) {
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printf("Active ATALK connections");
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if (aflag)
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printf(" (including servers)");
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putchar('\n');
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if (Aflag) {
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width = 18;
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printf("%-8.8s ", "PCB");
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}
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printf("%-5.5s %-6.6s %-6.6s %*.*s %*.*s %s\n",
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"Proto", "Recv-Q", "Send-Q",
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-width, width, "Local Address",
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-width, width, "Foreign Address", "(state)");
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first = 0;
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}
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if (Aflag)
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printf("%8lx ", ppcb);
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printf("%-5.5s %6ld %6ld ", name, sockb.so_rcv.sb_cc,
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sockb.so_snd.sb_cc);
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printf(" %*.*s", -width, width,
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atalk_print((struct sockaddr *)&ddpcb.ddp_lsat, 7));
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printf(" %*.*s", -width, width,
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atalk_print((struct sockaddr *)&ddpcb.ddp_fsat, 7));
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putchar('\n');
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}
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}
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#define ANY(x,y,z) \
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((sflag==1 || (x)) ? printf("\t%llu %s%s%s\n",(unsigned long long)x,y,plural(x),z) : 0)
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/*
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* Dump DDP statistics structure.
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*/
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void
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ddp_stats(u_long off, const char *name)
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{
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uint64_t ddpstat[DDP_NSTATS];
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if (use_sysctl) {
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size_t size = sizeof(ddpstat);
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if (prog_sysctlbyname("net.atalk.ddp.stats", ddpstat, &size,
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NULL, 0) == -1 && errno != ENOMEM)
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return;
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} else {
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warnx("%s stats not available via KVM.", name);
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return;
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}
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printf("%s:\n", name);
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ANY(ddpstat[DDP_STAT_SHORT], "packet", " with short headers ");
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ANY(ddpstat[DDP_STAT_LONG], "packet", " with long headers ");
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ANY(ddpstat[DDP_STAT_NOSUM], "packet", " with no checksum ");
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ANY(ddpstat[DDP_STAT_TOOSHORT], "packet", " too short ");
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ANY(ddpstat[DDP_STAT_BADSUM], "packet", " with bad checksum ");
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ANY(ddpstat[DDP_STAT_TOOSMALL], "packet", " with not enough data ");
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ANY(ddpstat[DDP_STAT_FORWARD], "packet", " forwarded ");
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ANY(ddpstat[DDP_STAT_ENCAP], "packet", " encapsulated ");
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ANY(ddpstat[DDP_STAT_CANTFORWARD], "packet", " rcvd for unreachable dest ");
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ANY(ddpstat[DDP_STAT_NOSOCKSPACE], "packet", " dropped due to no socket space ");
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}
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#undef ANY
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