311 lines
8.5 KiB
C
311 lines
8.5 KiB
C
/* $NetBSD: netbsd32_socket.c,v 1.37 2010/04/23 15:19:20 rmind 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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*
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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 1.37 2010/04/23 15:19:20 rmind Exp $");
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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/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/syscallargs.h>
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#include <sys/proc.h>
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#include <sys/dirent.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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/*
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* Note that the netbsd32_msghdr's iov really points to a struct iovec,
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* not a netbsd32_iovec.
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*/
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static int recvit32(struct lwp *, int, struct netbsd32_msghdr *,
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struct iovec *, void *, register_t *);
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int
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netbsd32_recvmsg(struct lwp *l, const struct netbsd32_recvmsg_args *uap, register_t *retval)
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{
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/* {
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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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} */
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struct netbsd32_msghdr msg;
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struct iovec aiov[UIO_SMALLIOV], *iov;
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struct netbsd32_iovec *iov32;
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size_t iovsz;
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int error;
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error = copyin(SCARG_P32(uap, msg), &msg, 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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iovsz = msg.msg_iovlen * sizeof(struct iovec);
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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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iov = kmem_alloc(iovsz, KM_SLEEP);
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} else
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iov = aiov;
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msg.msg_flags = SCARG(uap, flags);
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iov32 = NETBSD32PTR64(msg.msg_iov);
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error = netbsd32_to_iovecin(iov32, iov, msg.msg_iovlen);
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if (error)
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goto done;
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if ((error = recvit32(l, SCARG(uap, s), &msg, iov, (void *)0,
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retval)) == 0) {
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error = copyout(&msg, SCARG_P32(uap, msg), sizeof(msg));
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}
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done:
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if (iov != aiov)
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kmem_free(iov, iovsz);
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return (error);
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}
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int
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recvit32(struct lwp *l, int s, struct netbsd32_msghdr *mp, struct iovec *iov, void *namelenp, register_t *retsize)
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{
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struct uio auio;
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struct mbuf *from = 0, *control = 0;
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struct socket *so;
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struct iovec *ktriov = NULL;
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size_t len, iovsz;
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int i, error;
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/* fd_getsock() will use the descriptor for us */
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if ((error = fd_getsock(s, &so)) != 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_rw = UIO_READ;
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auio.uio_vmspace = l->l_proc->p_vmspace;
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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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/*
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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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iovsz = mp->msg_iovlen * sizeof(struct iovec);
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if (ktrpoint(KTR_GENIO)) {
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ktriov = kmem_alloc(iovsz, KM_SLEEP);
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memcpy(ktriov, auio.uio_iov, iovsz);
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}
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len = auio.uio_resid;
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error = (*so->so_receive)(so, &from, &auio, NULL,
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NETBSD32PTR64(mp->msg_control) ? &control : NULL,
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&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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if (ktriov != NULL) {
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ktrgeniov(s, UIO_READ, ktriov, len - auio.uio_resid, error);
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kmem_free(ktriov, iovsz);
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}
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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 (NETBSD32PTR64(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, void *),
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(void *)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((void *)&len, namelenp, sizeof(int))))
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goto out;
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}
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if (NETBSD32PTR64(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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void *cp = (void *)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, void *), cp,
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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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cp = (char *)cp + 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 = (char *)cp - (char *)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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fd_putfile(s);
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return (error);
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}
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int
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netbsd32_sendmsg(struct lwp *l, const struct netbsd32_sendmsg_args *uap, register_t *retval)
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{
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/* {
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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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} */
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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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struct netbsd32_iovec *iov32;
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size_t iovsz;
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int error;
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error = copyin(SCARG_P32(uap, msg), &msg32, 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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iovsz = msg.msg_iovlen * sizeof(struct iovec);
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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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iov = kmem_alloc(iovsz, KM_SLEEP);
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} else
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iov = aiov;
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iov32 = NETBSD32PTR64(msg32.msg_iov);
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error = netbsd32_to_iovecin(iov32, 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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msg.msg_flags = 0;
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/* Luckily we can use this directly */
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/* XXX: dsl (June'07) The cmsg alignment rules differ ! */
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error = do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
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done:
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if (iov != aiov)
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kmem_free(iov, iovsz);
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return (error);
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}
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int
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netbsd32_recvfrom(struct lwp *l, const struct netbsd32_recvfrom_args *uap, register_t *retval)
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{
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/* {
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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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} */
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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_P32(uap, fromlenaddr)) {
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error = copyin(SCARG_P32(uap, fromlenaddr),
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&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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NETBSD32PTR32(msg.msg_iov, 0); /* ignored in recvit32(), uses iov */
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msg.msg_iovlen = 1;
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aiov.iov_base = SCARG_P32(uap, buf);
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aiov.iov_len = (u_long)SCARG(uap, len);
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NETBSD32PTR32(msg.msg_control, 0);
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msg.msg_flags = SCARG(uap, flags);
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return (recvit32(l, SCARG(uap, s), &msg, &aiov,
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SCARG_P32(uap, fromlenaddr), retval));
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}
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int
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netbsd32_sendto(struct lwp *l, const struct netbsd32_sendto_args *uap, register_t *retval)
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{
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/* {
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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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} */
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struct msghdr msg;
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struct iovec aiov;
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msg.msg_name = SCARG_P32(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 = SCARG_P32(uap, buf); /* XXX kills const */
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aiov.iov_len = SCARG(uap, len);
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msg.msg_flags = 0;
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return do_sys_sendmsg(l, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
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}
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