| 1 | /* $NetBSD: if_43.c,v 1.13 2016/11/05 23:30:22 pgoyette Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1982, 1986, 1989, 1990, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | * |
| 31 | * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: if_43.c,v 1.13 2016/11/05 23:30:22 pgoyette Exp $" ); |
| 36 | |
| 37 | #if defined(_KERNEL_OPT) |
| 38 | #include "opt_compat_netbsd.h" |
| 39 | #endif |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/filedesc.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/proc.h> |
| 46 | #include <sys/file.h> |
| 47 | #include <sys/socket.h> |
| 48 | #include <sys/socketvar.h> |
| 49 | #include <sys/stat.h> |
| 50 | #include <sys/ioctl.h> |
| 51 | #include <sys/fcntl.h> |
| 52 | #include <sys/syslog.h> |
| 53 | #include <sys/unistd.h> |
| 54 | #include <sys/resourcevar.h> |
| 55 | #include <sys/mbuf.h> /* for MLEN */ |
| 56 | #include <sys/protosw.h> |
| 57 | |
| 58 | #include <sys/syscallargs.h> |
| 59 | |
| 60 | #include <net/if.h> |
| 61 | #include <net/bpf.h> |
| 62 | #include <net/route.h> |
| 63 | #include <netinet/in.h> |
| 64 | #include <netinet/in_systm.h> |
| 65 | #include <netinet/ip.h> |
| 66 | #include <net/if_gre.h> |
| 67 | #include <net/if_atm.h> |
| 68 | #include <net/if_tap.h> |
| 69 | #include <net80211/ieee80211_ioctl.h> |
| 70 | #include <netinet6/in6_var.h> |
| 71 | #include <netinet6/nd6.h> |
| 72 | #include <compat/sys/socket.h> |
| 73 | #include <compat/sys/sockio.h> |
| 74 | |
| 75 | #include <compat/common/compat_util.h> |
| 76 | #include <compat/common/if_43.h> |
| 77 | #include <uvm/uvm_extern.h> |
| 78 | |
| 79 | u_long |
| 80 | compat_cvtcmd(u_long cmd) |
| 81 | { |
| 82 | u_long ncmd; |
| 83 | |
| 84 | if (IOCPARM_LEN(cmd) != sizeof(struct oifreq)) |
| 85 | return cmd; |
| 86 | |
| 87 | switch (cmd) { |
| 88 | case OSIOCSIFADDR: |
| 89 | return SIOCSIFADDR; |
| 90 | case OOSIOCGIFADDR: |
| 91 | return SIOCGIFADDR; |
| 92 | case OSIOCSIFDSTADDR: |
| 93 | return SIOCSIFDSTADDR; |
| 94 | case OOSIOCGIFDSTADDR: |
| 95 | return SIOCGIFDSTADDR; |
| 96 | case OSIOCSIFFLAGS: |
| 97 | return SIOCSIFFLAGS; |
| 98 | case OSIOCGIFFLAGS: |
| 99 | return SIOCGIFFLAGS; |
| 100 | case OOSIOCGIFBRDADDR: |
| 101 | return SIOCGIFBRDADDR; |
| 102 | case OSIOCSIFBRDADDR: |
| 103 | return SIOCSIFBRDADDR; |
| 104 | case OOSIOCGIFCONF: |
| 105 | return SIOCGIFCONF; |
| 106 | case OOSIOCGIFNETMASK: |
| 107 | return SIOCGIFNETMASK; |
| 108 | case OSIOCSIFNETMASK: |
| 109 | return SIOCSIFNETMASK; |
| 110 | case OSIOCGIFCONF: |
| 111 | return SIOCGIFCONF; |
| 112 | case OSIOCADDMULTI: |
| 113 | return SIOCADDMULTI; |
| 114 | case OSIOCDELMULTI: |
| 115 | return SIOCDELMULTI; |
| 116 | case OSIOCSIFMEDIA: |
| 117 | return SIOCSIFMEDIA; |
| 118 | case OSIOCGIFMTU: |
| 119 | return SIOCGIFMTU; |
| 120 | case OSIOCGIFDATA: |
| 121 | return SIOCGIFDATA; |
| 122 | case OSIOCZIFDATA: |
| 123 | return SIOCZIFDATA; |
| 124 | case OBIOCGETIF: |
| 125 | return BIOCGETIF; |
| 126 | case OBIOCSETIF: |
| 127 | return BIOCSETIF; |
| 128 | case OTAPGIFNAME: |
| 129 | return TAPGIFNAME; |
| 130 | default: |
| 131 | /* |
| 132 | * XXX: the following code should be removed and the |
| 133 | * needing treatment ioctls should move to the switch |
| 134 | * above. |
| 135 | */ |
| 136 | ncmd = ((cmd) & ~(IOCPARM_MASK << IOCPARM_SHIFT)) | |
| 137 | (sizeof(struct ifreq) << IOCPARM_SHIFT); |
| 138 | switch (ncmd) { |
| 139 | case BIOCGETIF: |
| 140 | case BIOCSETIF: |
| 141 | case GREDSOCK: |
| 142 | case GREGADDRD: |
| 143 | case GREGADDRS: |
| 144 | case GREGPROTO: |
| 145 | case GRESADDRD: |
| 146 | case GRESADDRS: |
| 147 | case GRESPROTO: |
| 148 | case GRESSOCK: |
| 149 | #ifdef COMPAT_20 |
| 150 | case OSIOCG80211STATS: |
| 151 | case OSIOCG80211ZSTATS: |
| 152 | #endif /* COMPAT_20 */ |
| 153 | case SIOCADDMULTI: |
| 154 | case SIOCDELMULTI: |
| 155 | case SIOCDIFADDR: |
| 156 | case SIOCDIFADDR_IN6: |
| 157 | case SIOCDIFPHYADDR: |
| 158 | case SIOCGDEFIFACE_IN6: |
| 159 | case SIOCG80211NWID: |
| 160 | case SIOCG80211STATS: |
| 161 | case SIOCG80211ZSTATS: |
| 162 | case SIOCGIFADDR: |
| 163 | case SIOCGIFADDR_IN6: |
| 164 | case SIOCGIFAFLAG_IN6: |
| 165 | case SIOCGIFALIFETIME_IN6: |
| 166 | case SIOCGIFBRDADDR: |
| 167 | case SIOCGIFDLT: |
| 168 | case SIOCGIFDSTADDR: |
| 169 | case SIOCGIFDSTADDR_IN6: |
| 170 | case SIOCGIFFLAGS: |
| 171 | case SIOCGIFGENERIC: |
| 172 | case SIOCGIFMETRIC: |
| 173 | case SIOCGIFMTU: |
| 174 | case SIOCGIFNETMASK: |
| 175 | case SIOCGIFNETMASK_IN6: |
| 176 | case SIOCGIFPDSTADDR: |
| 177 | case SIOCGIFPDSTADDR_IN6: |
| 178 | case SIOCGIFPSRCADDR: |
| 179 | case SIOCGIFPSRCADDR_IN6: |
| 180 | case SIOCGIFSTAT_ICMP6: |
| 181 | case SIOCGIFSTAT_IN6: |
| 182 | case SIOCGPVCSIF: |
| 183 | case SIOCGVH: |
| 184 | case SIOCIFCREATE: |
| 185 | case SIOCIFDESTROY: |
| 186 | case SIOCS80211NWID: |
| 187 | case SIOCSDEFIFACE_IN6: |
| 188 | case SIOCSIFADDR: |
| 189 | case SIOCSIFADDR_IN6: |
| 190 | case SIOCSIFBRDADDR: |
| 191 | case SIOCSIFDSTADDR: |
| 192 | case SIOCSIFDSTADDR_IN6: |
| 193 | case SIOCSIFFLAGS: |
| 194 | case SIOCSIFGENERIC: |
| 195 | case SIOCSIFMEDIA: |
| 196 | case SIOCSIFMETRIC: |
| 197 | case SIOCSIFMTU: |
| 198 | case SIOCSIFNETMASK: |
| 199 | case SIOCSIFNETMASK_IN6: |
| 200 | case SIOCSNDFLUSH_IN6: |
| 201 | case SIOCSPFXFLUSH_IN6: |
| 202 | case SIOCSPVCSIF: |
| 203 | case SIOCSRTRFLUSH_IN6: |
| 204 | case SIOCSVH: |
| 205 | case TAPGIFNAME: |
| 206 | return ncmd; |
| 207 | default: |
| 208 | return cmd; |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | int |
| 214 | compat_ifioctl(struct socket *so, u_long ocmd, u_long cmd, void *data, |
| 215 | struct lwp *l) |
| 216 | { |
| 217 | int error; |
| 218 | struct ifreq *ifr = (struct ifreq *)data; |
| 219 | struct ifreq ifrb; |
| 220 | struct oifreq *oifr = NULL; |
| 221 | struct ifnet *ifp; |
| 222 | struct sockaddr *sa; |
| 223 | struct psref psref; |
| 224 | int bound = curlwp_bind(); |
| 225 | |
| 226 | ifp = if_get(ifr->ifr_name, &psref); |
| 227 | if (ifp == NULL) { |
| 228 | curlwp_bindx(bound); |
| 229 | return ENXIO; |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * If we have not been converted, make sure that we are. |
| 234 | * (because the upper layer handles old socket calls, but |
| 235 | * not oifreq calls. |
| 236 | */ |
| 237 | if (cmd == ocmd) { |
| 238 | cmd = compat_cvtcmd(ocmd); |
| 239 | } |
| 240 | if (cmd != ocmd) { |
| 241 | oifr = data; |
| 242 | data = ifr = &ifrb; |
| 243 | ifreqo2n(oifr, ifr); |
| 244 | } |
| 245 | |
| 246 | switch (ocmd) { |
| 247 | case OSIOCSIFADDR: |
| 248 | case OSIOCSIFDSTADDR: |
| 249 | case OSIOCSIFBRDADDR: |
| 250 | case OSIOCSIFNETMASK: |
| 251 | sa = &ifr->ifr_addr; |
| 252 | #if BYTE_ORDER != BIG_ENDIAN |
| 253 | if (sa->sa_family == 0 && sa->sa_len < 16) { |
| 254 | sa->sa_family = sa->sa_len; |
| 255 | sa->sa_len = 16; |
| 256 | } |
| 257 | #else |
| 258 | if (sa->sa_len == 0) |
| 259 | sa->sa_len = 16; |
| 260 | #endif |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, cmd, ifr, ifp); |
| 265 | if_put(ifp, &psref); |
| 266 | curlwp_bindx(bound); |
| 267 | |
| 268 | switch (ocmd) { |
| 269 | case OOSIOCGIFADDR: |
| 270 | case OOSIOCGIFDSTADDR: |
| 271 | case OOSIOCGIFBRDADDR: |
| 272 | case OOSIOCGIFNETMASK: |
| 273 | *(u_int16_t *)&ifr->ifr_addr = |
| 274 | ((struct sockaddr *)&ifr->ifr_addr)->sa_family; |
| 275 | break; |
| 276 | } |
| 277 | |
| 278 | if (cmd != ocmd) |
| 279 | ifreqn2o(oifr, ifr); |
| 280 | |
| 281 | return error; |
| 282 | } |
| 283 | |
| 284 | #if defined(COMPAT_43) |
| 285 | static u_long (*orig_compat_cvtcmd)(u_long); |
| 286 | static int (*orig_compat_ifioctl)(struct socket *, u_long, u_long, |
| 287 | void *, struct lwp *); |
| 288 | |
| 289 | void |
| 290 | if_43_init(void) |
| 291 | { |
| 292 | extern u_long (*vec_compat_cvtcmd)(u_long); |
| 293 | extern int (*vec_compat_ifioctl)(struct socket *, u_long, u_long, |
| 294 | void *, struct lwp *); |
| 295 | |
| 296 | orig_compat_cvtcmd = vec_compat_cvtcmd; |
| 297 | vec_compat_cvtcmd = compat_cvtcmd; |
| 298 | |
| 299 | orig_compat_ifioctl = vec_compat_ifioctl; |
| 300 | vec_compat_ifioctl = compat_ifioctl; |
| 301 | } |
| 302 | |
| 303 | void |
| 304 | if_43_fini(void) |
| 305 | { |
| 306 | |
| 307 | vec_compat_cvtcmd = orig_compat_cvtcmd; |
| 308 | vec_compat_ifioctl = orig_compat_ifioctl; |
| 309 | } |
| 310 | #endif /* defined(COMPAT_43) */ |
| 311 | |