diff options
Diffstat (limited to 'cpukit/libfs/src/nfsclient/src/sock_mbuf.c')
| -rw-r--r-- | cpukit/libfs/src/nfsclient/src/sock_mbuf.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/cpukit/libfs/src/nfsclient/src/sock_mbuf.c b/cpukit/libfs/src/nfsclient/src/sock_mbuf.c new file mode 100644 index 0000000000..3c589d9e81 --- /dev/null +++ b/cpukit/libfs/src/nfsclient/src/sock_mbuf.c @@ -0,0 +1,283 @@ +/* + * $Id$ + * + * 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. + +============================================================================= +*/ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <string.h> +#include <stdarg.h> +#include <stdio.h> + +#include <rtems.h> +#include <rtems/libio.h> +#include <rtems/error.h> + +#define _KERNEL +#define __BSD_VISIBLE 1 +#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> + +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); +} |