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netbsd32_socket.c revision 1.41.2.1
      1  1.41.2.1  jdolecek /*	$NetBSD: netbsd32_socket.c,v 1.41.2.1 2017/12/03 11:36:56 jdolecek Exp $	*/
      2       1.1       mrg 
      3       1.1       mrg /*
      4       1.1       mrg  * Copyright (c) 1998, 2001 Matthew R. Green
      5       1.1       mrg  * All rights reserved.
      6       1.1       mrg  *
      7       1.1       mrg  * Redistribution and use in source and binary forms, with or without
      8       1.1       mrg  * modification, are permitted provided that the following conditions
      9       1.1       mrg  * are met:
     10       1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     11       1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     12       1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     14       1.1       mrg  *    documentation and/or other materials provided with the distribution.
     15       1.1       mrg  *
     16       1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17       1.1       mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18       1.1       mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19       1.1       mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20       1.1       mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21       1.1       mrg  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22       1.1       mrg  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23       1.1       mrg  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24       1.1       mrg  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25       1.1       mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26       1.1       mrg  * SUCH DAMAGE.
     27       1.1       mrg  */
     28       1.6     lukem 
     29       1.6     lukem #include <sys/cdefs.h>
     30  1.41.2.1  jdolecek __KERNEL_RCSID(0, "$NetBSD: netbsd32_socket.c,v 1.41.2.1 2017/12/03 11:36:56 jdolecek Exp $");
     31       1.1       mrg 
     32       1.1       mrg #include <sys/param.h>
     33       1.1       mrg #include <sys/systm.h>
     34       1.1       mrg #define msg __msg /* Don't ask me! */
     35       1.1       mrg #include <sys/mount.h>
     36       1.1       mrg #include <sys/socket.h>
     37       1.1       mrg #include <sys/sockio.h>
     38       1.1       mrg #include <sys/socketvar.h>
     39       1.1       mrg #include <sys/mbuf.h>
     40       1.1       mrg #include <sys/ktrace.h>
     41       1.1       mrg #include <sys/file.h>
     42       1.1       mrg #include <sys/filedesc.h>
     43       1.1       mrg #include <sys/syscallargs.h>
     44       1.1       mrg #include <sys/proc.h>
     45      1.15  christos #include <sys/dirent.h>
     46       1.1       mrg 
     47       1.1       mrg #include <compat/netbsd32/netbsd32.h>
     48       1.1       mrg #include <compat/netbsd32/netbsd32_syscallargs.h>
     49       1.1       mrg #include <compat/netbsd32/netbsd32_conv.h>
     50       1.1       mrg 
     51      1.37     rmind /*
     52      1.39     joerg  * XXX Assumes that struct sockaddr is compatible.
     53      1.37     rmind  */
     54      1.39     joerg 
     55      1.39     joerg #define	CMSG32_ALIGN(n)	(((n) + ALIGNBYTES32) & ~ALIGNBYTES32)
     56      1.39     joerg #define	CMSG32_DATA(cmsg) \
     57      1.39     joerg 	((u_char *)(void *)(cmsg) + CMSG32_ALIGN(sizeof(struct cmsghdr)))
     58      1.39     joerg 
     59      1.39     joerg #define	CMSG32_NXTHDR(mhdr, cmsg)	\
     60      1.39     joerg 	(((char *)(cmsg) + CMSG32_ALIGN((cmsg)->cmsg_len) + \
     61      1.39     joerg 			    CMSG32_ALIGN(sizeof(struct cmsghdr)) > \
     62      1.39     joerg 	    (((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \
     63      1.39     joerg 	    (struct cmsghdr *)0 : \
     64      1.39     joerg 	    (struct cmsghdr *)((char *)(cmsg) + \
     65      1.39     joerg 	        CMSG32_ALIGN((cmsg)->cmsg_len)))
     66      1.39     joerg #define	CMSG32_FIRSTHDR(mhdr) \
     67      1.39     joerg 	((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
     68      1.39     joerg 	 (struct cmsghdr *)(mhdr)->msg_control : \
     69      1.39     joerg 	 (struct cmsghdr *)0)
     70      1.39     joerg 
     71      1.39     joerg #define CMSG32_SPACE(l)	(CMSG32_ALIGN(sizeof(struct cmsghdr)) + CMSG32_ALIGN(l))
     72      1.39     joerg #define CMSG32_LEN(l)	(CMSG32_ALIGN(sizeof(struct cmsghdr)) + (l))
     73      1.39     joerg 
     74      1.39     joerg static int
     75      1.39     joerg copyout32_msg_control_mbuf(struct lwp *l, struct msghdr *mp, int *len, struct mbuf *m, char **q, bool *truncated)
     76      1.39     joerg {
     77      1.39     joerg 	struct cmsghdr *cmsg, cmsg32;
     78      1.39     joerg 	int i, j, error;
     79      1.39     joerg 
     80      1.39     joerg 	*truncated = false;
     81      1.39     joerg 	cmsg = mtod(m, struct cmsghdr *);
     82      1.39     joerg 	do {
     83      1.39     joerg 		if ((char *)cmsg == mtod(m, char *) + m->m_len)
     84      1.39     joerg 			break;
     85      1.39     joerg 		if ((char *)cmsg > mtod(m, char *) + m->m_len - sizeof(*cmsg))
     86      1.39     joerg 			return EINVAL;
     87      1.39     joerg 		cmsg32 = *cmsg;
     88      1.39     joerg 		j = cmsg->cmsg_len - CMSG_LEN(0);
     89      1.39     joerg 		i = cmsg32.cmsg_len = CMSG32_LEN(j);
     90      1.39     joerg 		if (i > *len) {
     91      1.39     joerg 			mp->msg_flags |= MSG_CTRUNC;
     92      1.39     joerg 			if (cmsg->cmsg_level == SOL_SOCKET
     93      1.39     joerg 			    && cmsg->cmsg_type == SCM_RIGHTS) {
     94      1.39     joerg 				*truncated = true;
     95      1.39     joerg 				return 0;
     96      1.39     joerg 			}
     97      1.39     joerg 			j -= i - *len;
     98      1.39     joerg 			i = *len;
     99      1.39     joerg 		}
    100      1.39     joerg 
    101      1.39     joerg 		ktrkuser("msgcontrol", cmsg, cmsg->cmsg_len);
    102      1.39     joerg 		error = copyout(&cmsg32, *q, MAX(i, sizeof(cmsg32)));
    103      1.39     joerg 		if (error)
    104      1.39     joerg 			return (error);
    105      1.39     joerg 		if (i > CMSG32_LEN(0)) {
    106      1.39     joerg 			error = copyout(CMSG_DATA(cmsg), *q + CMSG32_LEN(0), i - CMSG32_LEN(0));
    107      1.39     joerg 			if (error)
    108      1.39     joerg 				return (error);
    109      1.39     joerg 		}
    110      1.39     joerg 		j = CMSG32_SPACE(cmsg->cmsg_len - CMSG_LEN(0));
    111      1.39     joerg 		if (*len >= j) {
    112      1.39     joerg 			*len -= j;
    113      1.39     joerg 			*q += j;
    114      1.39     joerg 		} else {
    115      1.39     joerg 			*q += i;
    116      1.39     joerg 			*len = 0;
    117      1.39     joerg 		}
    118      1.39     joerg 		cmsg = (void *)((char *)cmsg + CMSG_ALIGN(cmsg->cmsg_len));
    119      1.39     joerg 	} while (*len > 0);
    120      1.39     joerg 
    121      1.39     joerg 	return 0;
    122      1.39     joerg }
    123      1.39     joerg 
    124      1.39     joerg static int
    125      1.39     joerg copyout32_msg_control(struct lwp *l, struct msghdr *mp, struct mbuf *control)
    126      1.39     joerg {
    127      1.39     joerg 	int len, error = 0;
    128      1.39     joerg 	struct mbuf *m;
    129      1.39     joerg 	char *q;
    130      1.39     joerg 	bool truncated;
    131      1.39     joerg 
    132      1.39     joerg 	len = mp->msg_controllen;
    133      1.39     joerg 	if (len <= 0 || control == 0) {
    134      1.39     joerg 		mp->msg_controllen = 0;
    135      1.39     joerg 		free_control_mbuf(l, control, control);
    136      1.39     joerg 		return 0;
    137      1.39     joerg 	}
    138      1.39     joerg 
    139      1.39     joerg 	q = (char *)mp->msg_control;
    140      1.39     joerg 
    141      1.40      matt 	for (m = control; len > 0 && m != NULL; m = m->m_next) {
    142      1.39     joerg 		error = copyout32_msg_control_mbuf(l, mp, &len, m, &q, &truncated);
    143      1.39     joerg 		if (truncated) {
    144      1.39     joerg 			m = control;
    145      1.39     joerg 			break;
    146      1.39     joerg 		}
    147      1.39     joerg 		if (error)
    148      1.39     joerg 			break;
    149      1.39     joerg 	}
    150      1.39     joerg 
    151      1.39     joerg 	free_control_mbuf(l, control, m);
    152      1.39     joerg 
    153      1.39     joerg 	mp->msg_controllen = q - (char *)mp->msg_control;
    154      1.39     joerg 	return error;
    155      1.39     joerg }
    156      1.39     joerg 
    157       1.1       mrg int
    158      1.30       dsl netbsd32_recvmsg(struct lwp *l, const struct netbsd32_recvmsg_args *uap, register_t *retval)
    159       1.1       mrg {
    160      1.30       dsl 	/* {
    161       1.1       mrg 		syscallarg(int) s;
    162       1.1       mrg 		syscallarg(netbsd32_msghdrp_t) msg;
    163       1.1       mrg 		syscallarg(int) flags;
    164      1.30       dsl 	} */
    165      1.38     joerg 	struct netbsd32_msghdr	msg32;
    166      1.35     njoly 	struct iovec aiov[UIO_SMALLIOV], *iov;
    167      1.38     joerg 	struct msghdr	msg;
    168      1.38     joerg 	int		error;
    169      1.38     joerg 	struct mbuf	*from, *control;
    170      1.37     rmind 	size_t iovsz;
    171       1.1       mrg 
    172      1.38     joerg 	error = copyin(SCARG_P32(uap, msg), &msg32, sizeof(msg32));
    173       1.1       mrg 	if (error)
    174       1.1       mrg 		return (error);
    175      1.38     joerg 
    176      1.38     joerg 	iovsz = msg32.msg_iovlen * sizeof(struct iovec);
    177      1.38     joerg 	if (msg32.msg_iovlen > UIO_SMALLIOV) {
    178      1.38     joerg 		if (msg32.msg_iovlen > IOV_MAX)
    179       1.1       mrg 			return (EMSGSIZE);
    180      1.37     rmind 		iov = kmem_alloc(iovsz, KM_SLEEP);
    181      1.25  christos 	} else
    182       1.1       mrg 		iov = aiov;
    183      1.38     joerg 	error = netbsd32_to_iovecin(NETBSD32PTR64(msg32.msg_iov), iov,
    184      1.38     joerg 	    msg32.msg_iovlen);
    185       1.1       mrg 	if (error)
    186       1.1       mrg 		goto done;
    187       1.1       mrg 
    188      1.38     joerg 	msg.msg_flags = SCARG(uap, flags) & MSG_USERFLAGS;
    189      1.38     joerg 	msg.msg_name = NETBSD32PTR64(msg32.msg_name);
    190      1.38     joerg 	msg.msg_namelen = msg32.msg_namelen;
    191      1.38     joerg 	msg.msg_control = NETBSD32PTR64(msg32.msg_control);
    192      1.38     joerg 	msg.msg_controllen = msg32.msg_controllen;
    193      1.38     joerg 	msg.msg_iov = iov;
    194      1.38     joerg 	msg.msg_iovlen = msg32.msg_iovlen;
    195      1.13     perry 
    196  1.41.2.1  jdolecek 	error = do_sys_recvmsg(l, SCARG(uap, s), &msg, &msg32, sizeof(msg32),
    197  1.41.2.1  jdolecek 	    &from, msg.msg_control != NULL ? &control : NULL, retval);
    198      1.38     joerg 	if (error != 0)
    199      1.38     joerg 		goto done;
    200       1.1       mrg 
    201      1.38     joerg 	if (msg.msg_control != NULL)
    202      1.39     joerg 		error = copyout32_msg_control(l, &msg, control);
    203      1.27        ad 
    204      1.38     joerg 	if (error == 0)
    205      1.38     joerg 		error = copyout_sockname(msg.msg_name, &msg.msg_namelen, 0,
    206      1.38     joerg 			from);
    207      1.38     joerg 	if (from != NULL)
    208      1.38     joerg 		m_free(from);
    209      1.38     joerg 	if (error == 0) {
    210      1.38     joerg 		msg32.msg_namelen = msg.msg_namelen;
    211      1.38     joerg 		msg32.msg_controllen = msg.msg_controllen;
    212      1.38     joerg 		msg32.msg_flags = msg.msg_flags;
    213  1.41.2.1  jdolecek 		ktrkuser("msghdr", &msg32, sizeof msg32);
    214      1.38     joerg 		error = copyout(&msg32, SCARG_P32(uap, msg), sizeof(msg32));
    215       1.1       mrg 	}
    216      1.27        ad 
    217      1.38     joerg  done:
    218      1.38     joerg 	if (iov != aiov)
    219      1.38     joerg 		kmem_free(iov, iovsz);
    220       1.1       mrg 	return (error);
    221       1.1       mrg }
    222       1.1       mrg 
    223      1.39     joerg static int
    224      1.39     joerg copyin32_msg_control(struct lwp *l, struct msghdr *mp)
    225      1.39     joerg {
    226      1.39     joerg 	/*
    227      1.39     joerg 	 * Handle cmsg if there is any.
    228      1.39     joerg 	 */
    229      1.39     joerg 	struct cmsghdr *cmsg, cmsg32, *cc;
    230      1.39     joerg 	struct mbuf *ctl_mbuf;
    231      1.39     joerg 	ssize_t resid = mp->msg_controllen;
    232      1.39     joerg 	size_t clen, cidx = 0, cspace;
    233      1.39     joerg 	u_int8_t *control;
    234      1.39     joerg 	int error;
    235      1.39     joerg 
    236      1.39     joerg 	ctl_mbuf = m_get(M_WAIT, MT_CONTROL);
    237      1.39     joerg 	clen = MLEN;
    238      1.39     joerg 	control = mtod(ctl_mbuf, void *);
    239      1.39     joerg 	memset(control, 0, clen);
    240      1.39     joerg 
    241      1.39     joerg 	cc = CMSG32_FIRSTHDR(mp);
    242      1.39     joerg 	do {
    243      1.39     joerg 		error = copyin(cc, &cmsg32, sizeof(cmsg32));
    244      1.39     joerg 		if (error)
    245      1.39     joerg 			goto failure;
    246      1.39     joerg 
    247      1.39     joerg 		/*
    248      1.39     joerg 		 * Sanity check the control message length.
    249      1.39     joerg 		 */
    250      1.39     joerg 		if (cmsg32.cmsg_len > resid ||
    251      1.39     joerg 		    cmsg32.cmsg_len < sizeof(cmsg32)) {
    252      1.39     joerg 			error = EINVAL;
    253      1.39     joerg 			goto failure;
    254      1.39     joerg 		}
    255      1.39     joerg 
    256      1.39     joerg 		cspace = CMSG_SPACE(cmsg32.cmsg_len - CMSG32_LEN(0));
    257      1.39     joerg 
    258      1.39     joerg 		/* Check the buffer is big enough */
    259      1.39     joerg 		if (__predict_false(cidx + cspace > clen)) {
    260      1.39     joerg 			u_int8_t *nc;
    261      1.39     joerg 			size_t nclen;
    262      1.39     joerg 
    263      1.39     joerg 			nclen = cidx + cspace;
    264      1.39     joerg 			if (nclen >= PAGE_SIZE) {
    265      1.39     joerg 				error = EINVAL;
    266      1.39     joerg 				goto failure;
    267      1.39     joerg 			}
    268      1.39     joerg 			nc = realloc(clen <= MLEN ? NULL : control,
    269      1.39     joerg 				     nclen, M_TEMP, M_WAITOK);
    270      1.39     joerg 			if (!nc) {
    271      1.39     joerg 				error = ENOMEM;
    272      1.39     joerg 				goto failure;
    273      1.39     joerg 			}
    274      1.39     joerg 			if (cidx <= MLEN) {
    275      1.39     joerg 				/* Old buffer was in mbuf... */
    276      1.39     joerg 				memcpy(nc, control, cidx);
    277      1.39     joerg 				memset(nc + cidx, 0, nclen - cidx);
    278      1.39     joerg 			} else {
    279      1.39     joerg 				memset(nc + nclen, 0, nclen - clen);
    280      1.39     joerg 			}
    281      1.39     joerg 			control = nc;
    282      1.39     joerg 			clen = nclen;
    283      1.39     joerg 		}
    284      1.39     joerg 
    285      1.39     joerg 		/* Copy header */
    286      1.39     joerg 		cmsg = (void *)&control[cidx];
    287      1.39     joerg 		cmsg->cmsg_len = CMSG_LEN(cmsg32.cmsg_len - CMSG32_LEN(0));
    288      1.39     joerg 		cmsg->cmsg_level = cmsg32.cmsg_level;
    289      1.39     joerg 		cmsg->cmsg_type = cmsg32.cmsg_type;
    290      1.39     joerg 
    291      1.39     joerg 		/* Copyin the data */
    292      1.39     joerg 		error = copyin(CMSG32_DATA(cc), CMSG_DATA(cmsg),
    293      1.39     joerg 		    cmsg32.cmsg_len - CMSG32_LEN(0));
    294      1.39     joerg 		if (error)
    295      1.39     joerg 			goto failure;
    296      1.39     joerg 
    297      1.39     joerg 		resid -= CMSG32_ALIGN(cmsg32.cmsg_len);
    298      1.39     joerg 		cidx += cmsg->cmsg_len;
    299      1.41    martin 	} while (resid > 0 && (cc = CMSG32_NXTHDR(mp, &cmsg32)));
    300      1.39     joerg 
    301      1.39     joerg 	/* If we allocated a buffer, attach to mbuf */
    302      1.39     joerg 	if (cidx > MLEN) {
    303      1.39     joerg 		MEXTADD(ctl_mbuf, control, clen, M_MBUF, NULL, NULL);
    304      1.39     joerg 		ctl_mbuf->m_flags |= M_EXT_RW;
    305      1.39     joerg 	}
    306      1.39     joerg 	control = NULL;
    307      1.39     joerg 	mp->msg_controllen = ctl_mbuf->m_len = CMSG_ALIGN(cidx);
    308      1.39     joerg 
    309      1.39     joerg 	mp->msg_control = ctl_mbuf;
    310      1.39     joerg 	mp->msg_flags |= MSG_CONTROLMBUF;
    311      1.39     joerg 
    312      1.39     joerg 	ktrkuser("msgcontrol", mtod(ctl_mbuf, void *),
    313      1.39     joerg 	    mp->msg_controllen);
    314      1.39     joerg 
    315      1.39     joerg 	return 0;
    316      1.39     joerg 
    317      1.39     joerg failure:
    318      1.39     joerg 	if (control != mtod(ctl_mbuf, void *))
    319      1.39     joerg 		free(control, M_MBUF);
    320      1.39     joerg 	m_free(ctl_mbuf);
    321      1.39     joerg 	return error;
    322      1.39     joerg }
    323      1.39     joerg 
    324       1.1       mrg int
    325      1.30       dsl netbsd32_sendmsg(struct lwp *l, const struct netbsd32_sendmsg_args *uap, register_t *retval)
    326       1.1       mrg {
    327      1.30       dsl 	/* {
    328       1.1       mrg 		syscallarg(int) s;
    329       1.1       mrg 		syscallarg(const netbsd32_msghdrp_t) msg;
    330       1.1       mrg 		syscallarg(int) flags;
    331      1.30       dsl 	} */
    332       1.1       mrg 	struct msghdr msg;
    333       1.1       mrg 	struct netbsd32_msghdr msg32;
    334  1.41.2.1  jdolecek 	struct iovec aiov[UIO_SMALLIOV], *iov = aiov;
    335      1.35     njoly 	struct netbsd32_iovec *iov32;
    336      1.37     rmind 	size_t iovsz;
    337       1.1       mrg 	int error;
    338       1.1       mrg 
    339      1.24       dsl 	error = copyin(SCARG_P32(uap, msg), &msg32, sizeof(msg32));
    340       1.1       mrg 	if (error)
    341       1.1       mrg 		return (error);
    342       1.1       mrg 	netbsd32_to_msghdr(&msg32, &msg);
    343      1.39     joerg 	msg.msg_flags = 0;
    344      1.39     joerg 
    345      1.39     joerg 	if (CMSG32_FIRSTHDR(&msg)) {
    346      1.39     joerg 		error = copyin32_msg_control(l, &msg);
    347      1.39     joerg 		if (error)
    348      1.39     joerg 			return (error);
    349  1.41.2.1  jdolecek 		/* From here on, msg.msg_control is allocated */
    350      1.39     joerg 	} else {
    351      1.39     joerg 		msg.msg_control = NULL;
    352      1.39     joerg 		msg.msg_controllen = 0;
    353      1.39     joerg 	}
    354      1.26       dsl 
    355      1.37     rmind 	iovsz = msg.msg_iovlen * sizeof(struct iovec);
    356       1.1       mrg 	if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) {
    357  1.41.2.1  jdolecek 		if ((u_int)msg.msg_iovlen > IOV_MAX) {
    358  1.41.2.1  jdolecek 			error = EMSGSIZE;
    359  1.41.2.1  jdolecek 			goto out;
    360  1.41.2.1  jdolecek 		}
    361      1.37     rmind 		iov = kmem_alloc(iovsz, KM_SLEEP);
    362  1.41.2.1  jdolecek 	}
    363      1.26       dsl 
    364      1.35     njoly 	iov32 = NETBSD32PTR64(msg32.msg_iov);
    365      1.35     njoly 	error = netbsd32_to_iovecin(iov32, iov, msg.msg_iovlen);
    366       1.1       mrg 	if (error)
    367  1.41.2.1  jdolecek 		goto out;
    368       1.1       mrg 	msg.msg_iov = iov;
    369      1.26       dsl 
    370  1.41.2.1  jdolecek 	error = do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags),
    371  1.41.2.1  jdolecek 	    &msg32, sizeof(msg32), retval);
    372  1.41.2.1  jdolecek 	/* msg.msg_control freed by do_sys_sendmsg() */
    373  1.41.2.1  jdolecek 
    374       1.1       mrg 	if (iov != aiov)
    375      1.37     rmind 		kmem_free(iov, iovsz);
    376       1.1       mrg 	return (error);
    377  1.41.2.1  jdolecek 
    378  1.41.2.1  jdolecek out:
    379  1.41.2.1  jdolecek 	if (iov != aiov)
    380  1.41.2.1  jdolecek 		kmem_free(iov, iovsz);
    381  1.41.2.1  jdolecek 	if (msg.msg_control)
    382  1.41.2.1  jdolecek 		m_free(msg.msg_control);
    383  1.41.2.1  jdolecek 	return error;
    384       1.1       mrg }
    385       1.1       mrg 
    386       1.1       mrg int
    387      1.30       dsl netbsd32_recvfrom(struct lwp *l, const struct netbsd32_recvfrom_args *uap, register_t *retval)
    388       1.1       mrg {
    389      1.30       dsl 	/* {
    390       1.1       mrg 		syscallarg(int) s;
    391       1.1       mrg 		syscallarg(netbsd32_voidp) buf;
    392       1.1       mrg 		syscallarg(netbsd32_size_t) len;
    393       1.1       mrg 		syscallarg(int) flags;
    394       1.1       mrg 		syscallarg(netbsd32_sockaddrp_t) from;
    395       1.1       mrg 		syscallarg(netbsd32_intp) fromlenaddr;
    396      1.30       dsl 	} */
    397      1.38     joerg 	struct msghdr	msg;
    398      1.38     joerg 	struct iovec	aiov;
    399      1.38     joerg 	int		error;
    400      1.38     joerg 	struct mbuf	*from;
    401       1.1       mrg 
    402      1.38     joerg 	msg.msg_name = NULL;
    403      1.38     joerg 	msg.msg_iov = &aiov;
    404       1.1       mrg 	msg.msg_iovlen = 1;
    405      1.24       dsl 	aiov.iov_base = SCARG_P32(uap, buf);
    406      1.38     joerg 	aiov.iov_len = SCARG(uap, len);
    407      1.38     joerg 	msg.msg_control = NULL;
    408      1.38     joerg 	msg.msg_flags = SCARG(uap, flags) & MSG_USERFLAGS;
    409      1.38     joerg 
    410  1.41.2.1  jdolecek 	error = do_sys_recvmsg(l, SCARG(uap, s), &msg, NULL, ~0U,
    411  1.41.2.1  jdolecek 	    &from, NULL, retval);
    412      1.38     joerg 	if (error != 0)
    413      1.38     joerg 		return error;
    414      1.38     joerg 
    415      1.38     joerg 	error = copyout_sockname(SCARG_P32(uap, from), SCARG_P32(uap, fromlenaddr),
    416      1.38     joerg 	    MSG_LENUSRSPACE, from);
    417      1.38     joerg 	if (from != NULL)
    418      1.38     joerg 		m_free(from);
    419      1.38     joerg 	return error;
    420       1.1       mrg }
    421       1.1       mrg 
    422       1.1       mrg int
    423      1.30       dsl netbsd32_sendto(struct lwp *l, const struct netbsd32_sendto_args *uap, register_t *retval)
    424       1.1       mrg {
    425      1.30       dsl 	/* {
    426       1.1       mrg 		syscallarg(int) s;
    427       1.1       mrg 		syscallarg(const netbsd32_voidp) buf;
    428       1.1       mrg 		syscallarg(netbsd32_size_t) len;
    429       1.1       mrg 		syscallarg(int) flags;
    430       1.1       mrg 		syscallarg(const netbsd32_sockaddrp_t) to;
    431       1.1       mrg 		syscallarg(int) tolen;
    432      1.30       dsl 	} */
    433       1.1       mrg 	struct msghdr msg;
    434       1.1       mrg 	struct iovec aiov;
    435       1.1       mrg 
    436      1.24       dsl 	msg.msg_name = SCARG_P32(uap, to); /* XXX kills const */
    437       1.1       mrg 	msg.msg_namelen = SCARG(uap, tolen);
    438       1.1       mrg 	msg.msg_iov = &aiov;
    439       1.1       mrg 	msg.msg_iovlen = 1;
    440       1.1       mrg 	msg.msg_control = 0;
    441      1.24       dsl 	aiov.iov_base = SCARG_P32(uap, buf);	/* XXX kills const */
    442       1.1       mrg 	aiov.iov_len = SCARG(uap, len);
    443      1.26       dsl 	msg.msg_flags = 0;
    444  1.41.2.1  jdolecek 	return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags),
    445  1.41.2.1  jdolecek 	    NULL, ~0U, retval);
    446       1.1       mrg }
    447