347 lines
9.3 KiB
C
347 lines
9.3 KiB
C
/* $NetBSD: netbsd32_socket.c,v 1.12 2003/10/21 01:38:42 fvdl Exp $ */
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/*
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* Copyright (c) 1998, 2001 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: netbsd32_socket.c,v 1.12 2003/10/21 01:38:42 fvdl Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_ktrace.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#define msg __msg /* Don't ask me! */
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/socketvar.h>
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#include <sys/mbuf.h>
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#include <sys/ktrace.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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#include <sys/proc.h>
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#include <compat/netbsd32/netbsd32.h>
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#include <compat/netbsd32/netbsd32_syscallargs.h>
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#include <compat/netbsd32/netbsd32_conv.h>
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/* note that the netbsd32_msghdr's iov really points to a struct iovec, not a netbsd32_iovec. */
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static int recvit32 __P((struct proc *, int, struct netbsd32_msghdr *, struct iovec *, caddr_t,
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register_t *));
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int
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netbsd32_recvmsg(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct netbsd32_recvmsg_args /* {
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syscallarg(int) s;
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syscallarg(netbsd32_msghdrp_t) msg;
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syscallarg(int) flags;
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} */ *uap = v;
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struct netbsd32_msghdr msg;
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struct iovec aiov[UIO_SMALLIOV], *uiov, *iov;
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int error;
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error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, msg)), (caddr_t)&msg,
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sizeof(msg));
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/* netbsd32_msghdr needs the iov pre-allocated */
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if (error)
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return (error);
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if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) {
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if ((u_int)msg.msg_iovlen > IOV_MAX)
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return (EMSGSIZE);
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MALLOC(iov, struct iovec *,
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sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
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M_WAITOK);
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} else if ((u_int)msg.msg_iovlen > 0)
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iov = aiov;
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else
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return (EMSGSIZE);
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msg.msg_flags = SCARG(uap, flags);
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uiov = (struct iovec *)NETBSD32PTR64(msg.msg_iov);
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error = netbsd32_to_iovecin((struct netbsd32_iovec *)uiov,
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iov, msg.msg_iovlen);
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if (error)
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goto done;
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if ((error = recvit32(l->l_proc, SCARG(uap, s), &msg, iov, (caddr_t)0,
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retval)) == 0) {
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error = copyout((caddr_t)&msg,
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(caddr_t)NETBSD32PTR64(SCARG(uap, msg)), sizeof(msg));
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}
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done:
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if (iov != aiov)
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FREE(iov, M_IOV);
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return (error);
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}
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int
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recvit32(p, s, mp, iov, namelenp, retsize)
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struct proc *p;
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int s;
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struct netbsd32_msghdr *mp;
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struct iovec *iov;
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caddr_t namelenp;
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register_t *retsize;
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{
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struct file *fp;
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struct uio auio;
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int i;
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int len, error;
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struct mbuf *from = 0, *control = 0;
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struct socket *so;
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#ifdef KTRACE
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struct iovec *ktriov = NULL;
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#endif
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/* getsock() will use the descriptor for us */
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if ((error = getsock(p->p_fd, s, &fp)) != 0)
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return (error);
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auio.uio_iov = iov;
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auio.uio_iovcnt = mp->msg_iovlen;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_rw = UIO_READ;
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auio.uio_procp = p;
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auio.uio_offset = 0; /* XXX */
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auio.uio_resid = 0;
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for (i = 0; i < mp->msg_iovlen; i++, iov++) {
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#if 0
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/* cannot happen iov_len is unsigned */
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if (iov->iov_len < 0) {
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error = EINVAL;
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goto out1;
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}
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#endif
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/*
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* Reads return ssize_t because -1 is returned on error.
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* Therefore we must restrict the length to SSIZE_MAX to
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* avoid garbage return values.
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*/
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auio.uio_resid += iov->iov_len;
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if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
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error = EINVAL;
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goto out1;
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}
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}
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#ifdef KTRACE
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if (KTRPOINT(p, KTR_GENIO)) {
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int iovlen = auio.uio_iovcnt * sizeof(struct iovec);
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MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
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memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, iovlen);
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}
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#endif
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len = auio.uio_resid;
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so = (struct socket *)fp->f_data;
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error = (*so->so_receive)(so, &from, &auio, NULL,
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mp->msg_control ? &control : NULL, &mp->msg_flags);
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if (error) {
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if (auio.uio_resid != len && (error == ERESTART ||
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error == EINTR || error == EWOULDBLOCK))
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error = 0;
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}
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#ifdef KTRACE
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if (ktriov != NULL) {
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if (error == 0)
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ktrgenio(p, s, UIO_READ, ktriov,
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len - auio.uio_resid, error);
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FREE(ktriov, M_TEMP);
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}
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#endif
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if (error)
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goto out;
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*retsize = len - auio.uio_resid;
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if (mp->msg_name) {
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len = mp->msg_namelen;
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if (len <= 0 || from == 0)
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len = 0;
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else {
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if (len > from->m_len)
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len = from->m_len;
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/* else if len < from->m_len ??? */
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error = copyout(mtod(from, caddr_t),
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(caddr_t)NETBSD32PTR64(mp->msg_name),
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(unsigned)len);
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if (error)
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goto out;
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}
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mp->msg_namelen = len;
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if (namelenp &&
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(error = copyout((caddr_t)&len, namelenp, sizeof(int))))
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goto out;
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}
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if (mp->msg_control) {
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len = mp->msg_controllen;
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if (len <= 0 || control == 0)
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len = 0;
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else {
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struct mbuf *m = control;
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caddr_t p = (caddr_t)NETBSD32PTR64(mp->msg_control);
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do {
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i = m->m_len;
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if (len < i) {
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mp->msg_flags |= MSG_CTRUNC;
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i = len;
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}
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error = copyout(mtod(m, caddr_t), p,
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(unsigned)i);
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if (m->m_next)
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i = ALIGN(i);
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p += i;
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len -= i;
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if (error != 0 || len <= 0)
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break;
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} while ((m = m->m_next) != NULL);
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len = p - (caddr_t)NETBSD32PTR64(mp->msg_control);
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}
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mp->msg_controllen = len;
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}
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out:
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if (from)
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m_freem(from);
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if (control)
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m_freem(control);
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out1:
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FILE_UNUSE(fp, p);
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return (error);
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}
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int
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netbsd32_sendmsg(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct netbsd32_sendmsg_args /* {
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syscallarg(int) s;
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syscallarg(const netbsd32_msghdrp_t) msg;
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syscallarg(int) flags;
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} */ *uap = v;
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struct msghdr msg;
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struct netbsd32_msghdr msg32;
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struct iovec aiov[UIO_SMALLIOV], *iov;
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int error;
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error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, msg)), (caddr_t)&msg32,
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sizeof(msg32));
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if (error)
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return (error);
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netbsd32_to_msghdr(&msg32, &msg);
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if ((u_int)msg.msg_iovlen > UIO_SMALLIOV) {
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if ((u_int)msg.msg_iovlen > IOV_MAX)
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return (EMSGSIZE);
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MALLOC(iov, struct iovec *,
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sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
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M_WAITOK);
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} else if ((u_int)msg.msg_iovlen > 0)
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iov = aiov;
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else
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return (EMSGSIZE);
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error = netbsd32_to_iovecin((struct netbsd32_iovec *)msg.msg_iov,
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iov, msg.msg_iovlen);
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if (error)
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goto done;
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msg.msg_iov = iov;
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/* Luckily we can use this directly */
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error = sendit(l->l_proc, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
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done:
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if (iov != aiov)
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FREE(iov, M_IOV);
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return (error);
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}
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int
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netbsd32_recvfrom(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct netbsd32_recvfrom_args /* {
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syscallarg(int) s;
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syscallarg(netbsd32_voidp) buf;
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syscallarg(netbsd32_size_t) len;
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syscallarg(int) flags;
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syscallarg(netbsd32_sockaddrp_t) from;
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syscallarg(netbsd32_intp) fromlenaddr;
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} */ *uap = v;
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struct netbsd32_msghdr msg;
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struct iovec aiov;
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int error;
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if (SCARG(uap, fromlenaddr)) {
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error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)),
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(caddr_t)&msg.msg_namelen, sizeof(msg.msg_namelen));
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if (error)
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return (error);
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} else
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msg.msg_namelen = 0;
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msg.msg_name = SCARG(uap, from);
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msg.msg_iov = 0; /* ignored in recvit32(), uses iov */
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msg.msg_iovlen = 1;
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aiov.iov_base = (caddr_t)NETBSD32PTR64(SCARG(uap, buf));
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aiov.iov_len = (u_long)SCARG(uap, len);
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msg.msg_control = 0;
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msg.msg_flags = SCARG(uap, flags);
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return (recvit32(l->l_proc, SCARG(uap, s), &msg, &aiov,
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(caddr_t)NETBSD32PTR64(SCARG(uap, fromlenaddr)), retval));
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}
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int
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netbsd32_sendto(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct netbsd32_sendto_args /* {
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syscallarg(int) s;
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syscallarg(const netbsd32_voidp) buf;
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syscallarg(netbsd32_size_t) len;
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syscallarg(int) flags;
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syscallarg(const netbsd32_sockaddrp_t) to;
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syscallarg(int) tolen;
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} */ *uap = v;
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struct msghdr msg;
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struct iovec aiov;
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msg.msg_name = (caddr_t)NETBSD32PTR64(SCARG(uap, to)); /* XXX kills const */
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msg.msg_namelen = SCARG(uap, tolen);
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msg.msg_iov = &aiov;
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msg.msg_iovlen = 1;
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msg.msg_control = 0;
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aiov.iov_base = (char *)NETBSD32PTR64(SCARG(uap, buf)); /* XXX kills const */
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aiov.iov_len = SCARG(uap, len);
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return (sendit(l->l_proc, SCARG(uap, s), &msg, SCARG(uap, flags), retval));
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}
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