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1 /*

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,

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23 * Please see the License for the specific language governing rights and

24 * limitations under the License.

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26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

27 */

28 /*

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 */

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>

66 #include <net/if.h>

67 #include <net/if_mib.h>

68 #include <net/if_var.h>

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 */

93 SYSCTL_DECL(_net_link_generic);

 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RD | CTLFLAG_LOCKED, 0,

96 "Variables global to all interfaces");

 SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD | CTLFLAG_LOCKED,

     &if_index, 0, "Number of configured interfaces");

100

101 static int sysctl_ifdata SYSCTL_HANDLER_ARGS;

 SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RD | CTLFLAG_LOCKED,

103 sysctl_ifdata, "Interface table");

104

105 static int sysctl_ifalldata SYSCTL_HANDLER_ARGS;

 SYSCTL_NODE(_net_link_generic, IFMIB_IFALLDATA, ifalldata, CTLFLAG_RD | CTLFLAG_LOCKED,

107 sysctl_ifalldata, "Interface table");

108

 static int make_ifmibdata(struct ifnet *, int *, struct sysctl_req *);

110

111 int

 make_ifmibdata(struct ifnet *ifp, int *name, struct sysctl_req *req)

113 {

114 struct ifmibdata ifmd;

115 int error = 0;

116

         switch (name[1]) {

118 default:

119 error = ENOENT;

120 break;

121

122 case IFDATA_GENERAL:

                 bzero(&ifmd, sizeof(ifmd));

124 /*

125 * Make sure the interface is in use

126 */

                 if (ifnet_is_attached(ifp, 0)) {

                         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);

                         if_data_internal_to_if_data64(ifp, &ifp->if_data, &ifmd.ifmd_data);

135 #undef COPY

                         ifmd.ifmd_snd_len = IFCQ_LEN(&ifp->if_snd);

                         ifmd.ifmd_snd_maxlen = IFCQ_MAXLEN(&ifp->if_snd);

                         ifmd.ifmd_snd_drops = (unsigned int)ifp->if_snd.ifcq_dropcnt.packets;

139 }

                 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);

                 if (error || !req->newptr) {

142 break;

143 }

144

145 #ifdef IF_MIB_WR

                 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);

147 if (error) {

148 break;

149 }

150

151 #define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld

152 DONTCOPY(type);

153 DONTCOPY(physical);

154 DONTCOPY(addrlen);

155 DONTCOPY(hdrlen);

156 DONTCOPY(mtu);

157 DONTCOPY(metric);

158 DONTCOPY(baudrate);

159 #undef DONTCOPY

160 #define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld

161 COPY(data);

                 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;

                 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;

164 #undef COPY

165 #endif /* IF_MIB_WR */

166 break;

167

168 case IFDATA_LINKSPECIFIC:

                 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);

                 if (error || !req->newptr) {

171 break;

172 }

173

174 #ifdef IF_MIB_WR

                 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);

176 if (error) {

177 break;

178 }

179 #endif /* IF_MIB_WR */

180 break;

181

182 case IFDATA_SUPPLEMENTAL: {

183 struct ifmibdata_supplemental *ifmd_supp;

184

                 if ((ifmd_supp = _MALLOC(sizeof(*ifmd_supp), M_TEMP,

186 M_NOWAIT | M_ZERO)) == NULL) {

187 error = ENOMEM;

188 break;

189 }

190

                 if_copy_traffic_class(ifp, &ifmd_supp->ifmd_traffic_class);

                 if_copy_data_extended(ifp, &ifmd_supp->ifmd_data_extended);

                 if_copy_packet_stats(ifp, &ifmd_supp->ifmd_packet_stats);

                 if_copy_rxpoll_stats(ifp, &ifmd_supp->ifmd_rxpoll_stats);

                 if_copy_netif_stats(ifp, &ifmd_supp->ifmd_netif_stats);

196

                 if (req->oldptr == USER_ADDR_NULL) {

                         req->oldlen = sizeof(*ifmd_supp);

199 }

200

                 error = SYSCTL_OUT(req, ifmd_supp, MIN(sizeof(*ifmd_supp),

202 req->oldlen));

203

204 _FREE(ifmd_supp, M_TEMP);

205 break;

206 }

207 }

208

209 return error;

210 }

211

212 int

213 sysctl_ifdata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */

214 {

215 #pragma unused(oidp)

         int *name = (int *)arg1;

217 int error = 0;

218 u_int namelen = arg2;

219 struct ifnet *ifp;

220

         if (namelen != 2) {

222 return EINVAL;

223 }

224

225 ifnet_head_lock_shared();

         if (name[0] <= 0 || name[0] > if_index ||

             (ifp = ifindex2ifnet[name[0]]) == NULL) {

228 ifnet_head_done();

229 return ENOENT;

230 }

231 ifnet_reference(ifp);

232 ifnet_head_done();

233

234 ifnet_lock_shared(ifp);

         error = make_ifmibdata(ifp, name, req);

236 ifnet_lock_done(ifp);

237

238 ifnet_release(ifp);

239

240 return error;

241 }

242

243 int

244 sysctl_ifalldata SYSCTL_HANDLER_ARGS /* XXX bad syntax! */

245 {

246 #pragma unused(oidp)

         int *name = (int *)arg1;

248 int error = 0;

249 u_int namelen = arg2;

250 struct ifnet *ifp;

251

         if (namelen != 2) {

253 return EINVAL;

254 }

255

256 ifnet_head_lock_shared();

         TAILQ_FOREACH(ifp, &ifnet_head, if_link) {

258 ifnet_lock_shared(ifp);

259

                 error = make_ifmibdata(ifp, name, req);

261

262 ifnet_lock_done(ifp);

                 if (error != 0) {

264 break;

265 }

266 }

267 ifnet_head_done();

268 return error;

269 }