1 /* $NetBSD: if_media_80.c,v 1.5 2022/08/03 01:38:51 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Copyright (c) 1997
35 * Jonathan Stone and Jason R. Thorpe. All rights reserved.
36 *
37 * This software is derived from information provided by Matt Thomas.
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by Jonathan Stone
50 * and Jason R. Thorpe for the NetBSD Project.
51 * 4. The names of the authors may not be used to endorse or promote products
52 * derived from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
57 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
58 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
59 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
60 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
61 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
62 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 */
66
67 #include <sys/cdefs.h>
68 __KERNEL_RCSID(0, "$NetBSD: if_media_80.c,v 1.5 2022/08/03 01:38:51 riastradh Exp $");
69
70 #include <sys/param.h>
71 #include <sys/kernel.h>
72 #include <sys/syscallargs.h>
73 #include <sys/errno.h>
74 #include <sys/malloc.h>
75 #include <sys/proc.h>
76 #include <sys/compat_stub.h>
77
78 #include <net/if.h>
79 #include <net/if_media.h>
80
81 #include <compat/sys/sockio.h>
82 #include <compat/common/compat_mod.h>
83
84 static void
ifmword_n2o(int * oldwd,int * newwd)85 ifmword_n2o(int *oldwd, int *newwd)
86 {
87
88 if (IFM_SUBTYPE(*newwd) > IFM_OTHER)
89 *oldwd = (*newwd & ~(_IFM_ETH_XTMASK | IFM_TMASK)) | IFM_OTHER;
90 else
91 *oldwd = *newwd;
92 }
93
94 /*ARGSUSED*/
95 static int
compat_ifmediareq_pre(struct ifreq * ifr,u_long * cmd,bool * do_post)96 compat_ifmediareq_pre(struct ifreq *ifr, u_long *cmd, bool *do_post)
97 {
98 struct ifmediareq *ifmr = (struct ifmediareq *)ifr;
99
100 switch (*cmd) {
101 case SIOCSIFMEDIA_80:
102 *cmd = SIOCSIFMEDIA; /* Convert to new one */
103 if ((IFM_TYPE(ifr->ifr_media) == IFM_ETHER) &&
104 IFM_SUBTYPE(ifr->ifr_media) > IFM_OTHER) {
105 /* Clear unused bits to not to change to wrong media */
106 ifr->ifr_media &= ~_IFM_ETH_XTMASK;
107 }
108 return 0;
109 case SIOCGIFMEDIA_80:
110 *cmd = SIOCGIFMEDIA; /* Convert to new one */
111 if (ifmr->ifm_count != 0) {
112 /*
113 * Tell the upper layer to try to convert each ifmedia
114 * entry in the post process.
115 */
116 *do_post = true;
117 }
118 return 0;
119 default:
120 return 0;
121 }
122 }
123
124 /*ARGSUSED*/
125 static int
compat_ifmediareq_post(struct ifreq * ifr,u_long cmd)126 compat_ifmediareq_post(struct ifreq *ifr, u_long cmd)
127 {
128 struct ifmediareq *ifmr = (struct ifmediareq *)ifr;
129 size_t minwords;
130 size_t count;
131 int error, *kptr;
132
133 switch (cmd) {
134 case SIOCSIFMEDIA:
135 return 0;
136 case SIOCGIFMEDIA:
137 if (ifmr->ifm_count < 0)
138 return EINVAL;
139
140 /*
141 * ifmr->ifm_count was already ajusted in ifmedia_ioctl(), so
142 * there is no problem to trust ifm_count.
143 */
144 minwords = ifmr->ifm_count;
145 kptr = malloc(minwords * sizeof(*kptr), M_TEMP,
146 M_WAITOK|M_ZERO);
147 if (kptr == NULL)
148 return ENOMEM;
149
150 /*
151 * Convert ifm_current and ifm_active.
152 * It's not required to convert ifm_mask.
153 */
154 ifmword_n2o(&ifmr->ifm_current, &ifmr->ifm_current);
155 ifmword_n2o(&ifmr->ifm_active, &ifmr->ifm_active);
156
157 /* Convert ifm_ulist array */
158 for (count = 0; count < minwords; count++) {
159 int oldmwd;
160
161 error = ufetch_int(&ifmr->ifm_ulist[count], &oldmwd);
162 if (error != 0)
163 goto out;
164 ifmword_n2o(&kptr[count], &oldmwd);
165 }
166
167 /* Copy to userland in old format */
168 error = copyout(kptr, ifmr->ifm_ulist,
169 minwords * sizeof(*kptr));
170 out:
171 free(kptr, M_TEMP);
172 return error;
173 default:
174 return 0;
175 }
176 }
177
178 void
ifmedia_80_init(void)179 ifmedia_80_init(void)
180 {
181
182 MODULE_HOOK_SET(ifmedia_80_pre_hook, compat_ifmediareq_pre);
183 MODULE_HOOK_SET(ifmedia_80_post_hook, compat_ifmediareq_post);
184 }
185
186 void
ifmedia_80_fini(void)187 ifmedia_80_fini(void)
188 {
189
190 MODULE_HOOK_UNSET(ifmedia_80_post_hook);
191 MODULE_HOOK_UNSET(ifmedia_80_pre_hook);
192 }
193