1/*
2 * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright 1996 Massachusetts Institute of Technology
30 *
31 * Permission to use, copy, modify, and distribute this software and
32 * its documentation for any purpose and without fee is hereby
33 * granted, provided that both the above copyright notice and this
34 * permission notice appear in all copies, that both the above
35 * copyright notice and this permission notice appear in all
36 * supporting documentation, and that the name of M.I.T. not be used
37 * in advertising or publicity pertaining to distribution of the
38 * software without specific, written prior permission. M.I.T. makes
39 * no representations about the suitability of this software for any
40 * purpose. It is provided "as is" without express or implied
41 * warranty.
42 *
43 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
44 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
45 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
46 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
47 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
50 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
51 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
52 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
53 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 *
56 * $FreeBSD: src/sys/net/if_mib.c,v 1.8.2.1 2000/08/03 00:09:34 ps Exp $
57 */
58
59#include <sys/param.h>
60#include <sys/systm.h>
61#include <sys/kernel.h>
62#include <sys/socket.h>
63#include <sys/sysctl.h>
64#include <sys/systm.h>
65
66#include <net/if.h>
67#include <net/if_mib.h>
68#include <net/if_var.h>
69
70/*
71 * A sysctl(3) MIB for generic interface information. This information
72 * is exported in the net.link.generic branch, which has the following
73 * structure:
74 *
75 * net.link.generic .system - system-wide control variables
76 * and statistics (node)
77 * .ifdata.<ifindex>.general
78 * - what's in `struct ifdata'
79 * plus some other info
80 * .ifdata.<ifindex>.linkspecific
81 * - a link-type-specific data
82 * structure (as might be used
83 * by an SNMP agent
84 *
85 * Perhaps someday we will make addresses accessible via this interface
86 * as well (then there will be four such...). The reason that the
87 * index comes before the last element in the name is because it
88 * seems more orthogonal that way, particularly with the possibility
89 * of other per-interface data living down here as well (e.g., integrated
90 * services stuff).
91 */
92
93SYSCTL_DECL(_net_link_generic);
94
95SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RD|CTLFLAG_LOCKED, 0,
96 "Variables global to all interfaces");
97
98SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD | CTLFLAG_LOCKED,
99 &if_index, 0, "Number of configured interfaces");
100
101static int sysctl_ifdata SYSCTL_HANDLER_ARGS;
102SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RD | CTLFLAG_LOCKED,
103 sysctl_ifdata, "Interface table");
104
105static int sysctl_ifalldata SYSCTL_HANDLER_ARGS;
106SYSCTL_NODE(_net_link_generic, IFMIB_IFALLDATA, ifalldata, CTLFLAG_RD | CTLFLAG_LOCKED,
107 sysctl_ifalldata, "Interface table");
108
109static int make_ifmibdata(struct ifnet *, int *, struct sysctl_req *);
110
111int
112make_ifmibdata(struct ifnet *ifp, int *name, struct sysctl_req *req)
113{
114 struct ifmibdata ifmd;
115 int error = 0;
116
117 switch(name[1]) {
118 default:
119 error = ENOENT;
120 break;
121
122 case IFDATA_GENERAL:
123 bzero(&ifmd, sizeof(ifmd));
124 /*
125 * Make sure the interface is in use
126 */
127 if (ifnet_is_attached(ifp, 0)) {
128 snprintf(ifmd.ifmd_name, sizeof(ifmd.ifmd_name), "%s",
129 if_name(ifp));
130
131#define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
132 COPY(pcount);
133 COPY(flags);
134 if_data_internal_to_if_data64(ifp, &ifp->if_data, &ifmd.ifmd_data);
135#undef COPY
136 ifmd.ifmd_snd_len = IFCQ_LEN(&ifp->if_snd);
137 ifmd.ifmd_snd_maxlen = IFCQ_MAXLEN(&ifp->if_snd);
138 ifmd.ifmd_snd_drops = ifp->if_snd.ifcq_dropcnt.packets;
139 }
140 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
141 if (error || !req->newptr)
142 break;
143
144#ifdef IF_MIB_WR
145 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
146 if (error)
147 break;
148
149#define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
150 DONTCOPY(type);
151 DONTCOPY(physical);
152 DONTCOPY(addrlen);
153 DONTCOPY(hdrlen);
154 DONTCOPY(mtu);
155 DONTCOPY(metric);
156 DONTCOPY(baudrate);
157#undef DONTCOPY
158#define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
159 COPY(data);
160 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;
161 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;
162#undef COPY
163#endif /* IF_MIB_WR */
164 break;
165
166 case IFDATA_LINKSPECIFIC:
167 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
168 if (error || !req->newptr)
169 break;
170
171#ifdef IF_MIB_WR
172 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
173 if (error)
174 break;
175#endif /* IF_MIB_WR */
176 break;
177
178 case IFDATA_SUPPLEMENTAL: {
179 struct ifmibdata_supplemental *ifmd_supp;
180
181 if ((ifmd_supp = _MALLOC(sizeof (*ifmd_supp), M_TEMP,
182 M_NOWAIT | M_ZERO)) == NULL) {
183 error = ENOMEM;
184 break;
185 }
186
187 if_copy_traffic_class(ifp, &ifmd_supp->ifmd_traffic_class);
188 if_copy_data_extended(ifp, &ifmd_supp->ifmd_data_extended);
189 if_copy_packet_stats(ifp, &ifmd_supp->ifmd_packet_stats);
190 if_copy_rxpoll_stats(ifp, &ifmd_supp->ifmd_rxpoll_stats);
191
192 if (req->oldptr == USER_ADDR_NULL)
193 req->oldlen = sizeof (*ifmd_supp);
194
195 error = SYSCTL_OUT(req, ifmd_supp, MIN(sizeof (*ifmd_supp),
196 req->oldlen));
197
198 _FREE(ifmd_supp, M_TEMP);
199 break;
200 }
201 }
202
203 return error;
204}
205
206int
207sysctl_ifdata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */
208{
209#pragma unused(oidp)
210 int *name = (int *)arg1;
211 int error = 0;
212 u_int namelen = arg2;
213 struct ifnet *ifp;
214
215 if (namelen != 2)
216 return (EINVAL);
217
218 ifnet_head_lock_shared();
219 if (name[0] <= 0 || name[0] > if_index ||
220 (ifp = ifindex2ifnet[name[0]]) == NULL) {
221 ifnet_head_done();
222 return (ENOENT);
223 }
224 ifnet_reference(ifp);
225 ifnet_head_done();
226
227 ifnet_lock_shared(ifp);
228 error = make_ifmibdata(ifp, name, req);
229 ifnet_lock_done(ifp);
230
231 ifnet_release(ifp);
232
233 return (error);
234}
235
236int
237sysctl_ifalldata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */
238{
239#pragma unused(oidp)
240 int *name = (int *)arg1;
241 int error = 0;
242 u_int namelen = arg2;
243 struct ifnet *ifp;
244
245 if (namelen != 2)
246 return (EINVAL);
247
248 ifnet_head_lock_shared();
249 TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
250 ifnet_lock_shared(ifp);
251
252 error = make_ifmibdata(ifp, name, req);
253
254 ifnet_lock_done(ifp);
255 if (error != 0)
256 break;
257 }
258 ifnet_head_done();
259 return error;
260}
261