274 lines
8.1 KiB
C
274 lines
8.1 KiB
C
/*
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* Copyright (c) 2000-2021 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright 1996 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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* $FreeBSD: src/sys/net/if_mib.c,v 1.8.2.1 2000/08/03 00:09:34 ps Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <net/if.h>
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#include <net/if_mib.h>
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#include <net/if_var.h>
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#include <os/log.h>
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/*
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* A sysctl(3) MIB for generic interface information. This information
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* is exported in the net.link.generic branch, which has the following
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* structure:
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*
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* net.link.generic .system - system-wide control variables
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* and statistics (node)
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* .ifdata.<ifindex>.general
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* - what's in `struct ifdata'
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* plus some other info
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* .ifdata.<ifindex>.linkspecific
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* - a link-type-specific data
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* structure (as might be used
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* by an SNMP agent
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*
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* Perhaps someday we will make addresses accessible via this interface
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* as well (then there will be four such...). The reason that the
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* index comes before the last element in the name is because it
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* seems more orthogonal that way, particularly with the possibility
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* of other per-interface data living down here as well (e.g., integrated
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* services stuff).
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*/
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SYSCTL_DECL(_net_link_generic);
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SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RD | CTLFLAG_LOCKED, 0,
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"Variables global to all interfaces");
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SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD | CTLFLAG_LOCKED,
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&if_index, 0, "Number of configured interfaces");
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static int sysctl_ifdata SYSCTL_HANDLER_ARGS;
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SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RD | CTLFLAG_LOCKED,
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sysctl_ifdata, "Interface table");
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static int sysctl_ifalldata SYSCTL_HANDLER_ARGS;
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SYSCTL_NODE(_net_link_generic, IFMIB_IFALLDATA, ifalldata, CTLFLAG_RD | CTLFLAG_LOCKED,
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sysctl_ifalldata, "Interface table");
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static int make_ifmibdata(struct ifnet *, int *, struct sysctl_req *);
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int
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make_ifmibdata(struct ifnet *ifp, int *name, struct sysctl_req *req)
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{
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struct ifmibdata ifmd;
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int error = 0;
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switch (name[1]) {
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default:
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error = ENOENT;
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break;
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case IFDATA_GENERAL:
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bzero(&ifmd, sizeof(ifmd));
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/*
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* Make sure the interface is in use
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*/
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if (ifnet_is_attached(ifp, 0)) {
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snprintf(ifmd.ifmd_name, sizeof(ifmd.ifmd_name), "%s",
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if_name(ifp));
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#define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
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COPY(pcount);
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COPY(flags);
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if_data_internal_to_if_data64(ifp, &ifp->if_data, &ifmd.ifmd_data);
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#undef COPY
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ifmd.ifmd_snd_len = IFCQ_LEN(ifp->if_snd);
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ifmd.ifmd_snd_maxlen = IFCQ_MAXLEN(ifp->if_snd);
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ifmd.ifmd_snd_drops =
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(unsigned int)ifp->if_snd->ifcq_dropcnt.packets;
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}
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error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
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if (error || !req->newptr) {
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break;
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}
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#ifdef IF_MIB_WR
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error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
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if (error) {
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break;
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}
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#define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
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DONTCOPY(type);
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DONTCOPY(physical);
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DONTCOPY(addrlen);
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DONTCOPY(hdrlen);
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DONTCOPY(mtu);
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DONTCOPY(metric);
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DONTCOPY(baudrate);
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#undef DONTCOPY
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#define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
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COPY(data);
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ifp->if_snd->ifq_maxlen = ifmd.ifmd_snd_maxlen;
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ifp->if_snd->ifq_drops = ifmd.ifmd_snd_drops;
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#undef COPY
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#endif /* IF_MIB_WR */
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break;
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case IFDATA_LINKSPECIFIC:
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error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
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if (error || !req->newptr) {
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break;
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}
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#ifdef IF_MIB_WR
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error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
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if (error) {
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break;
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}
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#endif /* IF_MIB_WR */
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break;
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case IFDATA_SUPPLEMENTAL: {
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struct ifmibdata_supplemental *ifmd_supp;
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ifmd_supp = kalloc_type(struct ifmibdata_supplemental,
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Z_WAITOK | Z_ZERO | Z_NOFAIL);
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if_copy_traffic_class(ifp, &ifmd_supp->ifmd_traffic_class);
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if_copy_data_extended(ifp, &ifmd_supp->ifmd_data_extended);
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if_copy_packet_stats(ifp, &ifmd_supp->ifmd_packet_stats);
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if_copy_rxpoll_stats(ifp, &ifmd_supp->ifmd_rxpoll_stats);
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if_copy_netif_stats(ifp, &ifmd_supp->ifmd_netif_stats);
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if (req->oldptr == USER_ADDR_NULL) {
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req->oldlen = sizeof(*ifmd_supp);
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}
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error = SYSCTL_OUT(req, ifmd_supp, MIN(sizeof(*ifmd_supp),
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req->oldlen));
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#if DEVELOPMENT || DEBUG
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if (error != 0) {
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os_log(OS_LOG_DEFAULT, "%s: IFDATA_SUPPLEMENTAL SYSCTL_OUT(MIN(%lu, %lu) failed with error %d",
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__func__, sizeof(*ifmd_supp), req->oldlen, error);
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}
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#endif /* DEVELOPMENT || DEBUG */
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kfree_type(struct ifmibdata_supplemental, ifmd_supp);
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break;
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}
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}
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return error;
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}
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int
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sysctl_ifdata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */
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{
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#pragma unused(oidp)
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int *name = (int *)arg1;
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int error = 0;
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u_int namelen = arg2;
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struct ifnet *ifp;
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if (namelen != 2) {
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return EINVAL;
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}
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ifnet_head_lock_shared();
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if (name[0] <= 0 || name[0] > if_index ||
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(ifp = ifindex2ifnet[name[0]]) == NULL) {
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ifnet_head_done();
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return ENOENT;
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}
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ifnet_reference(ifp);
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ifnet_head_done();
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ifnet_lock_shared(ifp);
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error = make_ifmibdata(ifp, name, req);
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ifnet_lock_done(ifp);
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ifnet_release(ifp);
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return error;
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}
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int
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sysctl_ifalldata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */
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{
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#pragma unused(oidp)
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int *name = (int *)arg1;
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int error = 0;
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u_int namelen = arg2;
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struct ifnet *ifp;
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if (namelen != 2) {
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return EINVAL;
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}
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ifnet_head_lock_shared();
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TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
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ifnet_lock_shared(ifp);
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error = make_ifmibdata(ifp, name, req);
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ifnet_lock_done(ifp);
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if (error != 0) {
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break;
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}
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}
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ifnet_head_done();
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return error;
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}
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