/**
* @file
*
* @brief Sock Mbuf
* @ingroup libfs
*/
/*
* NOTE:
* This is derived from libnetworking/rtems/rtems_syscall.c
*
* RTEMS/libnetworking LICENSING restrictions may apply
*
* Author (modifications only):
* Copyright: 2002, Stanford University and
* Till Straumann, <strauman@slac.stanford.edu>
* Licensing: 'LICENSE.NET' file in the RTEMS top source directory
* for more information.
*
* The RTEMS TCP/IP stack is a port of the FreeBSD TCP/IP stack. The following
* copyright and licensing information applies to this code.
*
* This code is found under the c/src/libnetworking directory but does not
* constitute the entire contents of that subdirectory.
*
*
* Copyright (c) 1980, 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define _KERNEL
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/error.h>
#include <rtems/rtems_bsdnet.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <net/if.h>
#include <net/route.h>
#include "nfsclient-private.h"
struct socket *rtems_bsdnet_fdToSocket(int fd);
/*
* Package system call argument into mbuf.
*
* (unfortunately, the original is not public)
*/
static int
sockaddrtombuf (struct mbuf **mp, const struct sockaddr *buf, int buflen)
{
struct mbuf *m;
struct sockaddr *sa;
if ((u_int)buflen > MLEN)
return (EINVAL);
rtems_bsdnet_semaphore_obtain();
m = m_get(M_WAIT, MT_SONAME);
rtems_bsdnet_semaphore_release();
if (m == NULL)
return (ENOBUFS);
m->m_len = buflen;
memcpy (mtod(m, caddr_t), buf, buflen);
*mp = m;
sa = mtod(m, struct sockaddr *);
sa->sa_len = buflen;
return 0;
}
static void
dummyproc(caddr_t ext_buf, u_int ext_size)
{
}
/*
* send data by simply allocating an MBUF packet
* header and pointing it to our data region.
*
* Optionally, the caller may supply 'reference'
* and 'free' procs. (The latter may call the
* user back once the networking stack has
* released the buffer).
*
* The callbacks are provided with the 'closure'
* pointer and the 'buflen' argument.
*/
ssize_t
sendto_nocpy (
int s,
const void *buf, size_t buflen,
int flags,
const struct sockaddr *toaddr, int tolen,
void *closure,
void (*freeproc)(caddr_t, u_int),
void (*refproc)(caddr_t, u_int)
)
{
int error;
struct socket *so;
struct mbuf *to, *m;
int ret = -1;
rtems_bsdnet_semaphore_obtain ();
if ((so = rtems_bsdnet_fdToSocket (s)) == NULL) {
rtems_bsdnet_semaphore_release ();
return -1;
}
error = sockaddrtombuf (&to, toaddr, tolen);
if (error) {
errno = error;
rtems_bsdnet_semaphore_release ();
return -1;
}
MGETHDR(m, M_WAIT, MT_DATA);
m->m_pkthdr.len = 0;
m->m_pkthdr.rcvif = (struct ifnet *) 0;
m->m_flags |= M_EXT;
m->m_ext.ext_buf = closure ? closure : (void*)buf;
m->m_ext.ext_size = buflen;
/* we _must_ supply non-null procs; otherwise,
* the kernel code assumes it's a mbuf cluster
*/
m->m_ext.ext_free = freeproc ? freeproc : dummyproc;
m->m_ext.ext_ref = refproc ? refproc : dummyproc;
m->m_pkthdr.len += buflen;
m->m_len = buflen;
m->m_data = (void*)buf;
error = sosend (so, to, NULL, m, NULL, flags);
if (error) {
if (/*auio.uio_resid != len &&*/ (error == EINTR || error == EWOULDBLOCK))
error = 0;
}
if (error)
errno = error;
else
ret = buflen;
if (to)
m_freem(to);
rtems_bsdnet_semaphore_release ();
return (ret);
}
/*
* receive data in an 'mbuf chain'.
* The chain must be released once the
* data has been extracted:
*
* rtems_bsdnet_semaphore_obtain();
* m_freem(chain);
* rtems_bsdnet_semaphore_release();
*/
ssize_t
recv_mbuf_from(int s, struct mbuf **ppm, long len, struct sockaddr *fromaddr, int *fromlen)
{
int ret = -1;
int error;
struct uio auio;
struct socket *so;
struct mbuf *from = NULL;
memset(&auio, 0, sizeof(auio));
*ppm = 0;
rtems_bsdnet_semaphore_obtain ();
if ((so = rtems_bsdnet_fdToSocket (s)) == NULL) {
rtems_bsdnet_semaphore_release ();
return -1;
}
/* auio.uio_iov = mp->msg_iov;
auio.uio_iovcnt = mp->msg_iovlen;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_rw = UIO_READ;
auio.uio_offset = 0;
*/
auio.uio_resid = len;
error = soreceive (so, &from, &auio, (struct mbuf **) ppm,
(struct mbuf **)NULL,
NULL);
if (error) {
if (auio.uio_resid != len && (error == EINTR || error == EWOULDBLOCK))
error = 0;
}
if (error) {
errno = error;
}
else {
ret = len - auio.uio_resid;
if (fromaddr) {
len = *fromlen;
if ((len <= 0) || (from == NULL)) {
len = 0;
}
else {
if (len > from->m_len)
len = from->m_len;
memcpy (fromaddr, mtod(from, caddr_t), len);
}
*fromlen = len;
}
}
if (from)
m_freem (from);
if (error && *ppm) {
m_freem(*ppm);
*ppm = 0;
}
rtems_bsdnet_semaphore_release ();
return (ret);
}
