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linux32_socket.c revision 1.17
      1 /*	$NetBSD: linux32_socket.c,v 1.17 2013/01/11 19:01:36 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Emmanuel Dreyfus
     17  * 4. The name of the author may not be used to endorse or promote
     18  *    products derived from this software without specific prior written
     19  *    permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
     22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 __KERNEL_RCSID(0, "$NetBSD: linux32_socket.c,v 1.17 2013/01/11 19:01:36 christos Exp $");
     37 
     38 #include <sys/types.h>
     39 #include <sys/param.h>
     40 #include <sys/fstypes.h>
     41 #include <sys/signal.h>
     42 #include <sys/dirent.h>
     43 #include <sys/kernel.h>
     44 #include <sys/fcntl.h>
     45 #include <sys/select.h>
     46 #include <sys/proc.h>
     47 #include <sys/ucred.h>
     48 #include <sys/swap.h>
     49 #include <sys/file.h>
     50 #include <sys/vnode.h>
     51 #include <sys/filedesc.h>
     52 
     53 #include <machine/types.h>
     54 
     55 #include <net/if.h>
     56 #include <net/if_dl.h>
     57 #include <net/if_types.h>
     58 #include <net/route.h>
     59 
     60 #include <netinet/in.h>
     61 #include <netinet/ip_mroute.h>
     62 
     63 #include <sys/syscallargs.h>
     64 
     65 #include <compat/netbsd32/netbsd32.h>
     66 #include <compat/netbsd32/netbsd32_ioctl.h>
     67 #include <compat/netbsd32/netbsd32_conv.h>
     68 #include <compat/netbsd32/netbsd32_syscallargs.h>
     69 
     70 #include <compat/sys/socket.h>
     71 #include <compat/sys/sockio.h>
     72 
     73 #include <compat/linux/common/linux_types.h>
     74 #include <compat/linux/common/linux_types.h>
     75 #include <compat/linux/common/linux_signal.h>
     76 #include <compat/linux/common/linux_machdep.h>
     77 #include <compat/linux/common/linux_misc.h>
     78 #include <compat/linux/common/linux_oldolduname.h>
     79 #include <compat/linux/common/linux_ioctl.h>
     80 #include <compat/linux/common/linux_sockio.h>
     81 #include <compat/linux/common/linux_ipc.h>
     82 #include <compat/linux/common/linux_sem.h>
     83 #include <compat/linux/linux_syscallargs.h>
     84 
     85 #include <compat/linux32/common/linux32_types.h>
     86 #include <compat/linux32/common/linux32_signal.h>
     87 #include <compat/linux32/common/linux32_machdep.h>
     88 #include <compat/linux32/common/linux32_sysctl.h>
     89 #include <compat/linux32/common/linux32_socketcall.h>
     90 #include <compat/linux32/common/linux32_sockio.h>
     91 #include <compat/linux32/common/linux32_ioctl.h>
     92 #include <compat/linux32/linux32_syscallargs.h>
     93 
     94 int linux32_getifname(struct lwp *, register_t *, void *);
     95 int linux32_getifconf(struct lwp *, register_t *, void *);
     96 int linux32_getifhwaddr(struct lwp *, register_t *, u_int, void *);
     97 
     98 int
     99 linux32_sys_socketpair(struct lwp *l, const struct linux32_sys_socketpair_args *uap, register_t *retval)
    100 {
    101 	/* {
    102 		syscallarg(int) domain;
    103 		syscallarg(int) type;
    104 		syscallarg(int) protocol;
    105 		syscallarg(netbsd32_intp) rsv;
    106 	} */
    107 	struct linux_sys_socketpair_args ua;
    108 
    109 	NETBSD32TO64_UAP(domain);
    110 	NETBSD32TO64_UAP(type);
    111 	NETBSD32TO64_UAP(protocol);
    112 	NETBSD32TOP_UAP(rsv, int);
    113 
    114 	return linux_sys_socketpair(l, &ua, retval);
    115 }
    116 
    117 int
    118 linux32_sys_sendto(struct lwp *l, const struct linux32_sys_sendto_args *uap, register_t *retval)
    119 {
    120 	/* {
    121 		syscallarg(int) s;
    122 		syscallarg(netbsd32_voidp) msg;
    123 		syscallarg(int) len;
    124 		syscallarg(int) flags;
    125 		syscallarg(netbsd32_osockaddrp_t) to;
    126 		syscallarg(int) tolen;
    127 	} */
    128 	struct linux_sys_sendto_args ua;
    129 
    130 	NETBSD32TO64_UAP(s);
    131 	NETBSD32TOP_UAP(msg, void);
    132 	NETBSD32TO64_UAP(len);
    133 	NETBSD32TO64_UAP(flags);
    134 	NETBSD32TOP_UAP(to, struct osockaddr);
    135 	NETBSD32TO64_UAP(tolen);
    136 
    137 	return linux_sys_sendto(l, &ua, retval);
    138 }
    139 
    140 
    141 int
    142 linux32_sys_recvfrom(struct lwp *l, const struct linux32_sys_recvfrom_args *uap, register_t *retval)
    143 {
    144 	/* {
    145 		syscallarg(int) s;
    146 		syscallarg(netbsd32_voidp) buf;
    147 		syscallarg(netbsd32_size_t) len;
    148 		syscallarg(int) flags;
    149 		syscallarg(netbsd32_osockaddrp_t) from;
    150 		syscallarg(netbsd32_intp) fromlenaddr;
    151 	} */
    152 	struct linux_sys_recvfrom_args ua;
    153 
    154 	NETBSD32TO64_UAP(s);
    155 	NETBSD32TOP_UAP(buf, void);
    156 	NETBSD32TO64_UAP(len);
    157 	NETBSD32TO64_UAP(flags);
    158 	NETBSD32TOP_UAP(from, struct osockaddr);
    159 	NETBSD32TOP_UAP(fromlenaddr, unsigned int);
    160 
    161 	return linux_sys_recvfrom(l, &ua, retval);
    162 }
    163 
    164 int
    165 linux32_sys_setsockopt(struct lwp *l, const struct linux32_sys_setsockopt_args *uap, register_t *retval)
    166 {
    167 	/* {
    168 		syscallarg(int) s;
    169 		syscallarg(int) level;
    170 		syscallarg(int) optname;
    171 		syscallarg(netbsd32_voidp) optval;
    172 		syscallarg(int) optlen;
    173 	} */
    174 	struct linux_sys_setsockopt_args ua;
    175 
    176 	NETBSD32TO64_UAP(s);
    177 	NETBSD32TO64_UAP(level);
    178 	NETBSD32TO64_UAP(optname);
    179 	NETBSD32TOP_UAP(optval, void);
    180 	NETBSD32TO64_UAP(optlen);
    181 
    182 	return linux_sys_setsockopt(l, &ua, retval);
    183 }
    184 
    185 
    186 int
    187 linux32_sys_getsockopt(struct lwp *l, const struct linux32_sys_getsockopt_args *uap, register_t *retval)
    188 {
    189 	/* {
    190 		syscallarg(int) s;
    191 		syscallarg(int) level;
    192 		syscallarg(int) optname;
    193 		syscallarg(netbsd32_voidp) optval;
    194 		syscallarg(netbsd32_intp) optlen;
    195 	} */
    196 	struct linux_sys_getsockopt_args ua;
    197 
    198 	NETBSD32TO64_UAP(s);
    199 	NETBSD32TO64_UAP(level);
    200 	NETBSD32TO64_UAP(optname);
    201 	NETBSD32TOP_UAP(optval, void);
    202 	NETBSD32TOP_UAP(optlen, int);
    203 
    204 	return linux_sys_getsockopt(l, &ua, retval);
    205 }
    206 
    207 int
    208 linux32_sys_socket(struct lwp *l, const struct linux32_sys_socket_args *uap, register_t *retval)
    209 {
    210 	/* {
    211 		syscallarg(int) domain;
    212 		syscallarg(int) type;
    213 		syscallarg(int) protocol;
    214 	} */
    215 	struct linux_sys_socket_args ua;
    216 
    217 	NETBSD32TO64_UAP(domain);
    218 	NETBSD32TO64_UAP(type);
    219 	NETBSD32TO64_UAP(protocol);
    220 
    221 	return linux_sys_socket(l, &ua, retval);
    222 }
    223 
    224 int
    225 linux32_sys_bind(struct lwp *l, const struct linux32_sys_bind_args *uap, register_t *retval)
    226 {
    227 	/* {
    228 		syscallarg(int) s;
    229 		syscallarg(netbsd32_osockaddrp_t) name;
    230 		syscallarg(int) namelen;
    231 	} */
    232 	struct linux_sys_bind_args ua;
    233 
    234 	NETBSD32TO64_UAP(s);
    235 	NETBSD32TOP_UAP(name, struct osockaddr);
    236 	NETBSD32TO64_UAP(namelen);
    237 
    238 	return linux_sys_bind(l, &ua, retval);
    239 }
    240 
    241 int
    242 linux32_sys_connect(struct lwp *l, const struct linux32_sys_connect_args *uap, register_t *retval)
    243 {
    244 	/* {
    245 		syscallarg(int) s;
    246 		syscallarg(netbsd32_osockaddrp_t) name;
    247 		syscallarg(int) namelen;
    248 	} */
    249 	struct linux_sys_connect_args ua;
    250 
    251 	NETBSD32TO64_UAP(s);
    252 	NETBSD32TOP_UAP(name, struct osockaddr);
    253 	NETBSD32TO64_UAP(namelen);
    254 
    255 #ifdef DEBUG_LINUX
    256 	printf("linux32_sys_connect: s = %d, name = %p, namelen = %d\n",
    257 		SCARG(&ua, s), SCARG(&ua, name), SCARG(&ua, namelen));
    258 #endif
    259 
    260 	return linux_sys_connect(l, &ua, retval);
    261 }
    262 
    263 int
    264 linux32_sys_accept(struct lwp *l, const struct linux32_sys_accept_args *uap, register_t *retval)
    265 {
    266 	/* {
    267 		syscallarg(int) s;
    268 		syscallarg(netbsd32_osockaddrp_t) name;
    269 		syscallarg(netbsd32_intp) anamelen;
    270 	} */
    271 	struct linux_sys_accept_args ua;
    272 
    273 	NETBSD32TO64_UAP(s);
    274 	NETBSD32TOP_UAP(name, struct osockaddr);
    275 	NETBSD32TOP_UAP(anamelen, int);
    276 
    277 	return linux_sys_accept(l, &ua, retval);
    278 }
    279 
    280 int
    281 linux32_sys_getpeername(struct lwp *l, const struct linux32_sys_getpeername_args *uap, register_t *retval)
    282 {
    283 	/* {
    284 		syscallarg(int) fdes;
    285 		syscallarg(netbsd32_sockaddrp_t) asa;
    286 		syscallarg(netbsd32_intp) alen;
    287 	} */
    288 	struct linux_sys_getpeername_args ua;
    289 
    290 	NETBSD32TO64_UAP(fdes);
    291 	NETBSD32TOP_UAP(asa, struct sockaddr);
    292 	NETBSD32TOP_UAP(alen, int);
    293 
    294 	return linux_sys_getpeername(l, &ua, retval);
    295 }
    296 
    297 int
    298 linux32_sys_getsockname(struct lwp *l, const struct linux32_sys_getsockname_args *uap, register_t *retval)
    299 {
    300 	/* {
    301 		syscallarg(int) fdec;
    302 		syscallarg(netbsd32_charp) asa;
    303 		syscallarg(netbsd32_intp) alen;
    304 	} */
    305 	struct linux_sys_getsockname_args ua;
    306 
    307 	NETBSD32TO64_UAP(fdec);
    308 	NETBSD32TOP_UAP(asa, char);
    309 	NETBSD32TOP_UAP(alen, int);
    310 
    311 	return linux_sys_getsockname(l, &ua, retval);
    312 }
    313 
    314 int
    315 linux32_sys_sendmsg(struct lwp *l, const struct linux32_sys_sendmsg_args *uap, register_t *retval)
    316 {
    317 	/* {
    318 		syscallarg(int) s;
    319 		syscallarg(netbsd32_msghdrp_t) msg;
    320 		syscallarg(int) flags;
    321 	} */
    322 	struct linux_sys_sendmsg_args ua;
    323 
    324 	NETBSD32TO64_UAP(s);
    325 	NETBSD32TOP_UAP(msg, struct msghdr);
    326 	NETBSD32TO64_UAP(flags);
    327 
    328 	return linux_sys_sendmsg(l, &ua, retval);
    329 }
    330 
    331 int
    332 linux32_sys_recvmsg(struct lwp *l, const struct linux32_sys_recvmsg_args *uap, register_t *retval)
    333 {
    334 	/* {
    335 		syscallarg(int) s;
    336 		syscallarg(netbsd32_msghdrp_t) msg;
    337 		syscallarg(int) flags;
    338 	} */
    339 	struct linux_sys_recvmsg_args ua;
    340 
    341 	NETBSD32TO64_UAP(s);
    342 	NETBSD32TOP_UAP(msg, struct msghdr);
    343 	NETBSD32TO64_UAP(flags);
    344 
    345 	return linux_sys_recvmsg(l, &ua, retval);
    346 }
    347 
    348 int
    349 linux32_sys_send(struct lwp *l, const struct linux32_sys_send_args *uap, register_t *retval)
    350 {
    351 	/* {
    352 		syscallarg(int) s;
    353 		syscallarg(netbsd32_voidp) buf;
    354 		syscallarg(int) len;
    355 		syscallarg(int) flags;
    356 	} */
    357 	struct sys_sendto_args ua;
    358 
    359 	NETBSD32TO64_UAP(s);
    360 	NETBSD32TOP_UAP(buf, void);
    361 	NETBSD32TO64_UAP(len);
    362 	NETBSD32TO64_UAP(flags);
    363 	SCARG(&ua, to) = NULL;
    364 	SCARG(&ua, tolen) = 0;
    365 
    366 	return sys_sendto(l, &ua, retval);
    367 }
    368 
    369 int
    370 linux32_sys_recv(struct lwp *l, const struct linux32_sys_recv_args *uap, register_t *retval)
    371 {
    372 	/* {
    373 		syscallarg(int) s;
    374 		syscallarg(netbsd32_voidp) buf;
    375 		syscallarg(int) len;
    376 		syscallarg(int) flags;
    377 	} */
    378 	struct sys_recvfrom_args ua;
    379 
    380 	NETBSD32TO64_UAP(s);
    381 	NETBSD32TOP_UAP(buf, void);
    382 	NETBSD32TO64_UAP(len);
    383 	NETBSD32TO64_UAP(flags);
    384 	SCARG(&ua, from) = NULL;
    385 	SCARG(&ua, fromlenaddr) = NULL;
    386 
    387 	return sys_recvfrom(l, &ua, retval);
    388 }
    389 
    390 int
    391 linux32_getifname(struct lwp *l, register_t *retval, void *data)
    392 {
    393 	struct ifnet *ifp;
    394 	struct linux32_ifreq ifr;
    395 	int error;
    396 
    397 	error = copyin(data, &ifr, sizeof(ifr));
    398 	if (error)
    399 		return error;
    400 
    401 	if (ifr.ifr_ifru.ifru_ifindex >= if_indexlim)
    402 		return ENODEV;
    403 
    404 	ifp = ifindex2ifnet[ifr.ifr_ifru.ifru_ifindex];
    405 	if (ifp == NULL)
    406 		return ENODEV;
    407 
    408 	strncpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name));
    409 
    410 	return copyout(&ifr, data, sizeof(ifr));
    411 }
    412 
    413 int
    414 linux32_getifconf(struct lwp *l, register_t *retval, void *data)
    415 {
    416 	struct linux32_ifreq ifr, *ifrp;
    417 	struct linux32_ifconf ifc;
    418 	struct ifnet *ifp;
    419 	struct ifaddr *ifa;
    420 	struct sockaddr *sa;
    421 	struct osockaddr *osa;
    422 	int space, error = 0;
    423 	const int sz = (int)sizeof(ifr);
    424 
    425 	error = copyin(data, &ifc, sizeof(ifc));
    426 	if (error)
    427 		return error;
    428 
    429 	ifrp = NETBSD32PTR64(ifc.ifc_req);
    430 	if (ifrp == NULL)
    431 		space = 0;
    432 	else
    433 		space = ifc.ifc_len;
    434 
    435 	IFNET_FOREACH(ifp) {
    436 		(void)strncpy(ifr.ifr_name, ifp->if_xname,
    437 		    sizeof(ifr.ifr_name));
    438 		if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0')
    439 			return ENAMETOOLONG;
    440 		if (IFADDR_EMPTY(ifp))
    441 			continue;
    442 		IFADDR_FOREACH(ifa, ifp) {
    443 			sa = ifa->ifa_addr;
    444 			if (sa->sa_family != AF_INET ||
    445 			    sa->sa_len > sizeof(*osa))
    446 				continue;
    447 			memcpy(&ifr.ifr_addr, sa, sa->sa_len);
    448 			osa = (struct osockaddr *)&ifr.ifr_addr;
    449 			osa->sa_family = sa->sa_family;
    450 			if (space >= sz) {
    451 				error = copyout(&ifr, ifrp, sz);
    452 				if (error != 0)
    453 					return error;
    454 				ifrp++;
    455 			}
    456 			space -= sz;
    457 		}
    458 	}
    459 
    460 	if (ifrp != NULL)
    461 		ifc.ifc_len -= space;
    462 	else
    463 		ifc.ifc_len = -space;
    464 
    465 	return copyout(&ifc, data, sizeof(ifc));
    466 }
    467 
    468 int
    469 linux32_getifhwaddr(struct lwp *l, register_t *retval, u_int fd,
    470     void *data)
    471 {
    472 	struct linux32_ifreq lreq;
    473 	file_t *fp;
    474 	struct ifaddr *ifa;
    475 	struct ifnet *ifp;
    476 	struct sockaddr_dl *sadl;
    477 	int error, found;
    478 	int index, ifnum;
    479 
    480 	/*
    481 	 * We can't emulate this ioctl by calling sys_ioctl() to run
    482 	 * SIOCGIFCONF, because the user buffer is not of the right
    483 	 * type to take those results.  We can't use kernel buffers to
    484 	 * receive the results, as the implementation of sys_ioctl()
    485 	 * and ifconf() [which implements SIOCGIFCONF] use
    486 	 * copyin()/copyout() which will fail on kernel addresses.
    487 	 *
    488 	 * So, we must duplicate code from sys_ioctl() and ifconf().  Ugh.
    489 	 */
    490 
    491 	if ((fp = fd_getfile(fd)) == NULL)
    492 		return (EBADF);
    493 
    494 	KERNEL_LOCK(1, NULL);
    495 
    496 	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
    497 		error = EBADF;
    498 		goto out;
    499 	}
    500 
    501 	error = copyin(data, &lreq, sizeof(lreq));
    502 	if (error)
    503 		goto out;
    504 	lreq.ifr_name[LINUX32_IFNAMSIZ-1] = '\0';		/* just in case */
    505 
    506 	/*
    507 	 * Try real interface name first, then fake "ethX"
    508 	 */
    509 	found = 0;
    510 	IFNET_FOREACH(ifp) {
    511 		if (found)
    512 			break;
    513 		if (strcmp(lreq.ifr_name, ifp->if_xname))
    514 			/* not this interface */
    515 			continue;
    516 		found=1;
    517 		if (IFADDR_EMPTY(ifp)) {
    518 			error = ENODEV;
    519 			goto out;
    520 		}
    521 		IFADDR_FOREACH(ifa, ifp) {
    522 			sadl = satosdl(ifa->ifa_addr);
    523 			/* only return ethernet addresses */
    524 			/* XXX what about FDDI, etc. ? */
    525 			if (sadl->sdl_family != AF_LINK ||
    526 			    sadl->sdl_type != IFT_ETHER)
    527 				continue;
    528 			memcpy(&lreq.ifr_hwaddr.sa_data, CLLADDR(sadl),
    529 			       MIN(sadl->sdl_alen,
    530 				   sizeof(lreq.ifr_hwaddr.sa_data)));
    531 			lreq.ifr_hwaddr.sa_family =
    532 				sadl->sdl_family;
    533 			error = copyout(&lreq, data, sizeof(lreq));
    534 			goto out;
    535 		}
    536 	}
    537 
    538 	if (strncmp(lreq.ifr_name, "eth", 3) == 0) {
    539 		for (ifnum = 0, index = 3;
    540 		     index < LINUX32_IFNAMSIZ && lreq.ifr_name[index] != '\0';
    541 		     index++) {
    542 			ifnum *= 10;
    543 			ifnum += lreq.ifr_name[index] - '0';
    544 		}
    545 
    546 		error = EINVAL;			/* in case we don't find one */
    547 		found = 0;
    548 		IFNET_FOREACH(ifp) {
    549 			if (found)
    550 				break;
    551 			memcpy(lreq.ifr_name, ifp->if_xname,
    552 			       MIN(LINUX32_IFNAMSIZ, IFNAMSIZ));
    553 			IFADDR_FOREACH(ifa, ifp) {
    554 				sadl = satosdl(ifa->ifa_addr);
    555 				/* only return ethernet addresses */
    556 				/* XXX what about FDDI, etc. ? */
    557 				if (sadl->sdl_family != AF_LINK ||
    558 				    sadl->sdl_type != IFT_ETHER)
    559 					continue;
    560 				if (ifnum--)
    561 					/* not the reqested iface */
    562 					continue;
    563 				memcpy(&lreq.ifr_hwaddr.sa_data,
    564 				       CLLADDR(sadl),
    565 				       MIN(sadl->sdl_alen,
    566 					   sizeof(lreq.ifr_hwaddr.sa_data)));
    567 				lreq.ifr_hwaddr.sa_family =
    568 					sadl->sdl_family;
    569 				error = copyout(&lreq, data, sizeof(lreq));
    570 				found = 1;
    571 				break;
    572 			}
    573 		}
    574 	} else {
    575 		/* unknown interface, not even an "eth*" name */
    576 		error = ENODEV;
    577 	}
    578 
    579 out:
    580 	KERNEL_UNLOCK_ONE(NULL);
    581 	fd_putfile(fd);
    582 	return error;
    583 }
    584 
    585 int
    586 linux32_ioctl_socket(struct lwp *l, const struct linux32_sys_ioctl_args *uap, register_t *retval)
    587 {
    588 	/* {
    589 		syscallarg(int) fd;
    590 		syscallarg(u_long) com;
    591 		syscallarg(void *) data;
    592 	} */
    593 	u_long com;
    594 	int error = 0, isdev = 0, dosys = 1;
    595 	struct netbsd32_ioctl_args ia;
    596 	file_t *fp;
    597 	struct vnode *vp;
    598 	int (*ioctlf)(file_t *, u_long, void *);
    599 	struct ioctl_pt pt;
    600 
    601 	if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
    602 		return (EBADF);
    603 
    604 	if (fp->f_type == DTYPE_VNODE) {
    605 		vp = (struct vnode *)fp->f_data;
    606 		isdev = vp->v_type == VCHR;
    607 	}
    608 
    609 	/*
    610 	 * Don't try to interpret socket ioctl calls that are done
    611 	 * on a device filedescriptor, just pass them through, to
    612 	 * emulate Linux behaviour. Use PTIOCLINUX so that the
    613 	 * device will only handle these if it's prepared to do
    614 	 * so, to avoid unexpected things from happening.
    615 	 */
    616 	if (isdev) {
    617 		dosys = 0;
    618 		ioctlf = fp->f_ops->fo_ioctl;
    619 		pt.com = SCARG(uap, com);
    620 		pt.data = (void *)NETBSD32PTR64(SCARG(uap, data));
    621 		error = ioctlf(fp, PTIOCLINUX, &pt);
    622 		/*
    623 		 * XXX hack: if the function returns EJUSTRETURN,
    624 		 * it has stuffed a sysctl return value in pt.data.
    625 		 */
    626 		if (error == EJUSTRETURN) {
    627 			retval[0] = (register_t)pt.data;
    628 			error = 0;
    629 		}
    630 		goto out;
    631 	}
    632 
    633 	com = SCARG(uap, com);
    634 	retval[0] = 0;
    635 
    636 	switch (com) {
    637 	case LINUX_SIOCGIFNAME:
    638 		error = linux32_getifname(l, retval, SCARG_P32(uap, data));
    639 		dosys = 0;
    640 		break;
    641 	case LINUX_SIOCGIFCONF:
    642 		error = linux32_getifconf(l, retval, SCARG_P32(uap, data));
    643 		dosys = 0;
    644 		break;
    645 	case LINUX_SIOCGIFFLAGS:
    646 		SCARG(&ia, com) = OSIOCGIFFLAGS32;
    647 		break;
    648 	case LINUX_SIOCSIFFLAGS:
    649 		SCARG(&ia, com) = OSIOCSIFFLAGS32;
    650 		break;
    651 	case LINUX_SIOCGIFADDR:
    652 		SCARG(&ia, com) = OOSIOCGIFADDR32;
    653 		break;
    654 	case LINUX_SIOCGIFDSTADDR:
    655 		SCARG(&ia, com) = OOSIOCGIFDSTADDR32;
    656 		break;
    657 	case LINUX_SIOCGIFBRDADDR:
    658 		SCARG(&ia, com) = OOSIOCGIFBRDADDR32;
    659 		break;
    660 	case LINUX_SIOCGIFNETMASK:
    661 		SCARG(&ia, com) = OOSIOCGIFNETMASK32;
    662 		break;
    663 	case LINUX_SIOCGIFMTU:
    664 		SCARG(&ia, com) = OSIOCGIFMTU32;
    665 		break;
    666 	case LINUX_SIOCADDMULTI:
    667 		SCARG(&ia, com) = OSIOCADDMULTI32;
    668 		break;
    669 	case LINUX_SIOCDELMULTI:
    670 		SCARG(&ia, com) = OSIOCDELMULTI32;
    671 		break;
    672 	case LINUX_SIOCGIFHWADDR:
    673 		error = linux32_getifhwaddr(l, retval, SCARG(uap, fd),
    674 		    SCARG_P32(uap, data));
    675 		dosys = 0;
    676 		break;
    677 	default:
    678 		error = EINVAL;
    679 	}
    680 
    681  out:
    682  	fd_putfile(SCARG(uap, fd));
    683 
    684 	if (error == 0 && dosys) {
    685 		SCARG(&ia, fd) = SCARG(uap, fd);
    686 		SCARG(&ia, data) = SCARG(uap, data);
    687 		error = netbsd32_ioctl(curlwp, &ia, retval);
    688 	}
    689 
    690 	return error;
    691 }
    692