803 lines
23 KiB
C
803 lines
23 KiB
C
/****************************************************************************
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* fs/nfs/rpc_clnt.c
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*
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* Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
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* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
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* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
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* Gregory Nutt <gnutt@nuttx.org>
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*
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* Leveraged from OpenBSD:
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*
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* Copyright (c) 2004 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Copyright (c) 2004 Weston Andros Adamson <muzzle@umich.edu>.
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* Copyright (c) 2004 Marius Aamodt Eriksen <marius@umich.edu>.
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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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*
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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. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (c) 1989, 1991, 1993, 1995 The Regents of the University of
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* California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by Rick Macklem at
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* The University of Guelph.
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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 are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution. 3. All advertising
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* materials mentioning features or use of this software must display the
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* following acknowledgement: This product includes software developed by the
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* University of California, Berkeley and its contributors. 4. Neither the
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* name of the University nor the names of its contributors may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <queue.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include "xdr_subs.h"
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#include "nfs_proto.h"
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#include "rpc.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Increment RPC statistics */
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#ifdef CONFIG_NFS_STATISTICS
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# define rpc_statistics(n) do { rpcstats.n++; } while (0)
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#else
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# define rpc_statistics(n)
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Static data, mostly RPC constants in XDR form */
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static uint32_t rpc_reply;
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static uint32_t rpc_call;
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static uint32_t rpc_vers;
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static uint32_t rpc_msgdenied;
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static uint32_t rpc_mismatch;
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static uint32_t rpc_auth_unix;
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static uint32_t rpc_msgaccepted;
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static uint32_t rpc_autherr;
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static uint32_t rpc_auth_null;
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/* Global statics for all client instances. Cleared by NuttX on boot-up. */
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#ifdef CONFIG_NFS_STATISTICS
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static struct rpcstats rpcstats;
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#endif
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int rpcclnt_send(FAR struct rpcclnt *rpc, int procid, int prog,
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FAR void *call, int reqlen);
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static int rpcclnt_receive(FAR struct rpcclnt *rpc, struct sockaddr *aname,
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int proc, int program, void *reply, size_t resplen);
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static int rpcclnt_reply(FAR struct rpcclnt *rpc, int procid, int prog,
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void *reply, size_t resplen);
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static uint32_t rpcclnt_newxid(void);
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static void rpcclnt_fmtheader(FAR struct rpc_call_header *ch,
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uint32_t xid, int procid, int prog, int vers);
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rpcclnt_send
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*
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* Description:
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* This is the nfs send routine.
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*
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* Returned Value:
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* Returns zero on success or a (positive) errno value on failure.
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*
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****************************************************************************/
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static int rpcclnt_send(FAR struct rpcclnt *rpc, int procid, int prog,
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FAR void *call, int reqlen)
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{
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ssize_t nbytes;
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int error = OK;
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/* Send the call message
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*
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* On success, psock_sendto returns the number of bytes sent;
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* On failure, it returns -1 with the specific error in errno.
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*/
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nbytes = psock_sendto(rpc->rc_so, call, reqlen, 0,
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rpc->rc_name, sizeof(struct sockaddr));
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if (nbytes < 0)
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{
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/* psock_sendto failed */
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error = get_errno();
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fdbg("ERROR: psock_sendto failed: %d\n", error);
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}
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return error;
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}
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/****************************************************************************
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* Name: rpcclnt_receive
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*
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* Description:
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* Receive a Sun RPC Request/Reply. For SOCK_DGRAM, the work is all done
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* by psock_recvfrom().
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*
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****************************************************************************/
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static int rpcclnt_receive(FAR struct rpcclnt *rpc, FAR struct sockaddr *aname,
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int proc, int program, FAR void *reply,
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size_t resplen)
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{
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ssize_t nbytes;
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int error = 0;
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socklen_t fromlen = sizeof(struct sockaddr);
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nbytes = psock_recvfrom(rpc->rc_so, reply, resplen, 0, aname, &fromlen);
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if (nbytes < 0)
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{
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error = get_errno();
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fdbg("ERROR: psock_recvfrom failed: %d\n", error);
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}
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return error;
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}
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/****************************************************************************
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* Name: rpcclnt_reply
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*
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* Description:
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* Received the RPC reply on the socket.
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*
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****************************************************************************/
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static int rpcclnt_reply(FAR struct rpcclnt *rpc, int procid, int prog,
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FAR void *reply, size_t resplen)
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{
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int error;
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/* Get the next RPC reply from the socket */
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error = rpcclnt_receive(rpc, rpc->rc_name, procid, prog, reply, resplen);
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if (error != 0)
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{
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fdbg("ERROR: rpcclnt_receive returned: %d\n", error);
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/* If we failed because of a timeout, then try sending the CALL
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* message again.
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*/
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if (error == EAGAIN || error == ETIMEDOUT)
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{
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rpc->rc_timeout = true;
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}
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}
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/* Get the xid and check that it is an RPC replysvr */
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else
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{
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FAR struct rpc_reply_header *replyheader =
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(FAR struct rpc_reply_header *)reply;
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if (replyheader->rp_direction != rpc_reply)
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{
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fdbg("ERROR: Different RPC REPLY returned\n");
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rpc_statistics(rpcinvalid);
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error = EPROTO;
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}
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}
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return error;
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}
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/****************************************************************************
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* Name: rpcclnt_newxid
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*
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* Description:
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* Get a new (non-zero) xid
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*
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****************************************************************************/
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static uint32_t rpcclnt_newxid(void)
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{
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static uint32_t rpcclnt_xid = 0;
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static uint32_t rpcclnt_xid_touched = 0;
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srand(time(NULL));
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if ((rpcclnt_xid == 0) && (rpcclnt_xid_touched == 0))
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{
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rpcclnt_xid = rand();
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rpcclnt_xid_touched = 1;
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}
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else
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{
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int xidp = 0;
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do
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{
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xidp = rand();
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}
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while ((xidp % 256) == 0);
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rpcclnt_xid += xidp;
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}
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return rpcclnt_xid;
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}
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/****************************************************************************
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* Name: rpcclnt_fmtheader
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*
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* Description:
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* Format the common part of the call header
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*
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****************************************************************************/
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static void rpcclnt_fmtheader(FAR struct rpc_call_header *ch,
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uint32_t xid, int prog, int vers, int procid)
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{
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/* Format the call header */
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ch->rp_xid = txdr_unsigned(xid);
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ch->rp_direction = rpc_call;
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ch->rp_rpcvers = rpc_vers;
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ch->rp_prog = txdr_unsigned(prog);
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ch->rp_vers = txdr_unsigned(vers);
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ch->rp_proc = txdr_unsigned(procid);
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/* rpc_auth part (auth_null) */
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ch->rpc_auth.authtype = rpc_auth_null;
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ch->rpc_auth.authlen = 0;
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/* rpc_verf part (auth_null) */
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ch->rpc_verf.authtype = rpc_auth_null;
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ch->rpc_verf.authlen = 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rpcclnt_init
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*
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* Description:
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* Initialize the RPC client
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*
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****************************************************************************/
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void rpcclnt_init(void)
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{
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/* RPC constants how about actually using more than one of these! */
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rpc_reply = txdr_unsigned(RPC_REPLY);
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rpc_vers = txdr_unsigned(RPC_VER2);
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rpc_call = txdr_unsigned(RPC_CALL);
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rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
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rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
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rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
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rpc_autherr = txdr_unsigned(RPC_AUTHERR);
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rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
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rpc_auth_null = txdr_unsigned(RPCAUTH_NULL);
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fvdbg("RPC initialized\n");
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}
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/****************************************************************************
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* Name: rpcclnt_connect
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*
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* Description:
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* Initialize sockets for a new RPC connection. We do not free the
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* sockaddr if an error occurs.
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*
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****************************************************************************/
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int rpcclnt_connect(struct rpcclnt *rpc)
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{
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struct socket *so;
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int error;
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struct sockaddr *saddr;
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struct sockaddr_in sin;
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struct sockaddr_in *sa;
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union
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{
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struct rpc_call_pmap sdata;
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struct rpc_call_mount mountd;
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} request;
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union
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{
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struct rpc_reply_pmap rdata;
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struct rpc_reply_mount mdata;
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} response;
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struct timeval tv;
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uint16_t tport;
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int errval;
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fvdbg("Connecting\n");
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/* Create the socket */
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saddr = rpc->rc_name;
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/* Create an instance of the socket state structure */
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so = (struct socket *)kmm_zalloc(sizeof(struct socket));
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if (!so)
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{
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fdbg("ERROR: Failed to allocate socket structure\n");
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return ENOMEM;
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}
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error = psock_socket(saddr->sa_family, rpc->rc_sotype, IPPROTO_UDP, so);
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if (error < 0)
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{
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errval = get_errno();
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fdbg("ERROR: psock_socket failed: %d", errval);
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return error;
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}
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so->s_crefs = 1;
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rpc->rc_so = so;
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/* Always set receive timeout to detect server crash and reconnect.
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* Otherwise, we can get stuck in psock_receive forever.
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*/
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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error = psock_setsockopt(rpc->rc_so, SOL_SOCKET, SO_RCVTIMEO,
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(const void *)&tv, sizeof(tv));
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if (error < 0)
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{
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errval = get_errno();
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fdbg("ERROR: psock_setsockopt failed: %d\n", errval);
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goto bad;
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}
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/* Some servers require that the client port be a reserved port
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* number. We always allocate a reserved port, as this prevents
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* filehandle disclosure through UDP port capture.
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*/
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = INADDR_ANY;
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tport = 1024;
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errval = 0;
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do
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{
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tport--;
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sin.sin_port = htons(tport);
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error = psock_bind(rpc->rc_so, (struct sockaddr *)&sin, sizeof(sin));
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if (error < 0)
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{
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errval = get_errno();
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fdbg("ERROR: psock_bind failed: %d\n", errval);
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}
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}
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while (errval == EADDRINUSE && tport > 1024 / 2);
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if (error)
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{
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fdbg("ERROR: psock_bind failed: %d\n", errval);
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goto bad;
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}
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/* Protocols that do not require connections may be optionally left
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* unconnected for servers that reply from a port other than
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* NFS_PORT.
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*/
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error = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
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if (error < 0)
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{
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errval = get_errno();
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fdbg("ERROR: psock_connect to PMAP port failed: %d", errval);
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goto bad;
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}
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/* Do the RPC to get a dynamic bounding with the server using ppmap.
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* Get port number for MOUNTD.
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*/
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request.sdata.pmap.prog = txdr_unsigned(RPCPROG_MNT);
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request.sdata.pmap.vers = txdr_unsigned(RPCMNT_VER1);
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request.sdata.pmap.proc = txdr_unsigned(IPPROTO_UDP);
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request.sdata.pmap.port = 0;
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error = rpcclnt_request(rpc, PMAPPROC_GETPORT, PMAPPROG, PMAPVERS,
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(FAR void *)&request.sdata, sizeof(struct call_args_pmap),
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(FAR void *)&response.rdata, sizeof(struct rpc_reply_pmap));
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if (error != 0)
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{
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fdbg("ERROR: rpcclnt_request failed: %d\n", error);
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goto bad;
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}
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sa = (FAR struct sockaddr_in *)saddr;
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sa->sin_port = htons(fxdr_unsigned(uint32_t, response.rdata.pmap.port));
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error = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
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if (error < 0)
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{
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errval = get_errno();
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fdbg("ERROR: psock_connect MOUNTD port failed: %d\n", errval);
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goto bad;
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}
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/* Do RPC to mountd. */
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strncpy(request.mountd.mount.rpath, rpc->rc_path, 90);
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request.mountd.mount.len = txdr_unsigned(sizeof(request.mountd.mount.rpath));
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error = rpcclnt_request(rpc, RPCMNT_MOUNT, RPCPROG_MNT, RPCMNT_VER1,
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(FAR void *)&request.mountd, sizeof(struct call_args_mount),
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(FAR void *)&response.mdata, sizeof(struct rpc_reply_mount));
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if (error != 0)
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{
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fdbg("ERROR: rpcclnt_request failed: %d\n", error);
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goto bad;
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}
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error = fxdr_unsigned(uint32_t, response.mdata.mount.status);
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if (error != 0)
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{
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fdbg("ERROR: Bad mount status: %d\n", error);
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goto bad;
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}
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memcpy(&rpc->rc_fh, &response.mdata.mount.fhandle, sizeof(nfsfh_t));
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/* Do the RPC to get a dynamic bounding with the server using PMAP.
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* NFS port in the socket.
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*/
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sa->sin_port = htons(PMAPPORT);
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error = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
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if (error < 0)
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{
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errval = get_errno();
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|
fdbg("ERROR: psock_connect PMAP port failed: %d\n", errval);
|
|
goto bad;
|
|
}
|
|
|
|
request.sdata.pmap.prog = txdr_unsigned(NFS_PROG);
|
|
request.sdata.pmap.vers = txdr_unsigned(NFS_VER3);
|
|
request.sdata.pmap.proc = txdr_unsigned(IPPROTO_UDP);
|
|
request.sdata.pmap.port = 0;
|
|
|
|
error = rpcclnt_request(rpc, PMAPPROC_GETPORT, PMAPPROG, PMAPVERS,
|
|
(FAR void *)&request.sdata, sizeof(struct call_args_pmap),
|
|
(FAR void *)&response.rdata, sizeof(struct rpc_reply_pmap));
|
|
if (error != 0)
|
|
{
|
|
fdbg("ERROR: rpcclnt_request failed: %d\n", error);
|
|
goto bad;
|
|
}
|
|
|
|
sa->sin_port = htons(fxdr_unsigned(uint32_t, response.rdata.pmap.port));
|
|
|
|
error = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
|
|
if (error)
|
|
{
|
|
fdbg("psock_connect NFS port returns %d\n", error);
|
|
goto bad;
|
|
}
|
|
|
|
return OK;
|
|
|
|
bad:
|
|
rpcclnt_disconnect(rpc);
|
|
return error;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: rpcclnt_disconnect
|
|
*
|
|
* Description:
|
|
* Disconnect from the NFS server.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void rpcclnt_disconnect(struct rpcclnt *rpc)
|
|
{
|
|
if (rpc->rc_so != NULL)
|
|
{
|
|
(void)psock_close(rpc->rc_so);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: rpcclnt_umount
|
|
*
|
|
* Description:
|
|
* Un-mount the NFS file system.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int rpcclnt_umount(struct rpcclnt *rpc)
|
|
{
|
|
struct sockaddr *saddr;
|
|
struct sockaddr_in *sa;
|
|
|
|
union
|
|
{
|
|
struct rpc_call_pmap sdata;
|
|
struct rpc_call_umount mountd;
|
|
} request;
|
|
|
|
union
|
|
{
|
|
struct rpc_reply_pmap rdata;
|
|
struct rpc_reply_umount mdata;
|
|
} response;
|
|
|
|
int error;
|
|
int ret;
|
|
|
|
saddr = rpc->rc_name;
|
|
sa = (FAR struct sockaddr_in *)saddr;
|
|
|
|
/* Do the RPC to get a dynamic bounding with the server using ppmap.
|
|
* Get port number for MOUNTD.
|
|
*/
|
|
|
|
sa->sin_port = htons(PMAPPORT);
|
|
|
|
ret = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
|
|
if (ret < 0)
|
|
{
|
|
error = get_errno();
|
|
fdbg("ERROR: psock_connect failed [port=%d]: %d\n",
|
|
ntohs(sa->sin_port), error);
|
|
goto bad;
|
|
}
|
|
|
|
request.sdata.pmap.prog = txdr_unsigned(RPCPROG_MNT);
|
|
request.sdata.pmap.vers = txdr_unsigned(RPCMNT_VER1);
|
|
request.sdata.pmap.proc = txdr_unsigned(IPPROTO_UDP);
|
|
request.sdata.pmap.port = 0;
|
|
|
|
error = rpcclnt_request(rpc, PMAPPROC_GETPORT, PMAPPROG, PMAPVERS,
|
|
(FAR void *)&request.sdata, sizeof(struct call_args_pmap),
|
|
(FAR void *)&response.rdata, sizeof(struct rpc_reply_pmap));
|
|
if (error != 0)
|
|
{
|
|
fdbg("ERROR: rpcclnt_request failed: %d\n", error);
|
|
goto bad;
|
|
}
|
|
|
|
sa->sin_port = htons(fxdr_unsigned(uint32_t, response.rdata.pmap.port));
|
|
|
|
ret = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
|
|
if (ret < 0)
|
|
{
|
|
error = get_errno();
|
|
fdbg("ERROR: psock_connect failed [port=%d]: %d\n",
|
|
ntohs(sa->sin_port), error);
|
|
goto bad;
|
|
}
|
|
|
|
/* Do RPC to umountd. */
|
|
|
|
strncpy(request.mountd.umount.rpath, rpc->rc_path, 92);
|
|
request.mountd.umount.len = txdr_unsigned(sizeof(request.mountd.umount.rpath));
|
|
|
|
error = rpcclnt_request(rpc, RPCMNT_UMOUNT, RPCPROG_MNT, RPCMNT_VER1,
|
|
(FAR void *)&request.mountd, sizeof(struct call_args_umount),
|
|
(FAR void *)&response.mdata, sizeof(struct rpc_reply_umount));
|
|
if (error != 0)
|
|
{
|
|
fdbg("ERROR: rpcclnt_request failed: %d\n", error);
|
|
goto bad;
|
|
}
|
|
|
|
return OK;
|
|
|
|
bad:
|
|
rpcclnt_disconnect(rpc);
|
|
return error;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: rpcclnt_request
|
|
*
|
|
* Description:
|
|
* Perform the RPC request. Logic formats the RPC CALL message and calls
|
|
* rpcclnt_send to send the RPC CALL message. It then calls rpcclnt_reply()
|
|
* to get the response. It may attempt to re-send the CALL message on
|
|
* certain errors.
|
|
*
|
|
* On successful receipt, it verifies the RPC level of the returned values.
|
|
* (There may still be be NFS layer errors that will be deted by calling
|
|
* logic).
|
|
*
|
|
****************************************************************************/
|
|
|
|
int rpcclnt_request(FAR struct rpcclnt *rpc, int procnum, int prog,
|
|
int version, FAR void *request, size_t reqlen,
|
|
FAR void *response, size_t resplen)
|
|
{
|
|
struct rpc_reply_header *replymsg;
|
|
uint32_t tmp;
|
|
uint32_t xid;
|
|
int retries;
|
|
int error = 0;
|
|
|
|
/* Get a new (non-zero) xid */
|
|
|
|
xid = rpcclnt_newxid();
|
|
|
|
/* Initialize the RPC header fields */
|
|
|
|
rpcclnt_fmtheader((FAR struct rpc_call_header *)request,
|
|
xid, prog, version, procnum);
|
|
|
|
/* Get the full size of the message (the size of variable data plus the size of
|
|
* the messages header).
|
|
*/
|
|
|
|
reqlen += sizeof(struct rpc_call_header);
|
|
|
|
/* Send the RPC call messsages and receive the RPC response. A limited
|
|
* number of re-tries will be attempted, but only for the case of response
|
|
* timeouts.
|
|
*/
|
|
|
|
retries = 0;
|
|
do
|
|
{
|
|
/* Do the client side RPC. */
|
|
|
|
rpc_statistics(rpcrequests);
|
|
rpc->rc_timeout = false;
|
|
|
|
/* Send the RPC CALL message */
|
|
|
|
error = rpcclnt_send(rpc, procnum, prog, request, reqlen);
|
|
if (error != OK)
|
|
{
|
|
fvdbg("ERROR rpcclnt_send failed: %d\n", error);
|
|
}
|
|
|
|
/* Wait for the reply from our send */
|
|
|
|
else
|
|
{
|
|
error = rpcclnt_reply(rpc, procnum, prog, response, resplen);
|
|
if (error != OK)
|
|
{
|
|
fvdbg("ERROR rpcclnt_reply failed: %d\n", error);
|
|
}
|
|
}
|
|
|
|
retries++;
|
|
}
|
|
while (rpc->rc_timeout && retries <= rpc->rc_retry);
|
|
|
|
if (error != OK)
|
|
{
|
|
fdbg("ERROR: RPC failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
/* Break down the RPC header and check if it is OK */
|
|
|
|
replymsg = (FAR struct rpc_reply_header *)response;
|
|
|
|
tmp = fxdr_unsigned(uint32_t, replymsg->type);
|
|
if (tmp == RPC_MSGDENIED)
|
|
{
|
|
tmp = fxdr_unsigned(uint32_t, replymsg->status);
|
|
switch (tmp)
|
|
{
|
|
case RPC_MISMATCH:
|
|
fdbg("RPC_MSGDENIED: RPC_MISMATCH error\n");
|
|
return EOPNOTSUPP;
|
|
|
|
case RPC_AUTHERR:
|
|
fdbg("RPC_MSGDENIED: RPC_AUTHERR error\n");
|
|
return EACCES;
|
|
|
|
default:
|
|
return EOPNOTSUPP;
|
|
}
|
|
}
|
|
else if (tmp != RPC_MSGACCEPTED)
|
|
{
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
tmp = fxdr_unsigned(uint32_t, replymsg->status);
|
|
if (tmp == RPC_SUCCESS)
|
|
{
|
|
fvdbg("RPC_SUCCESS\n");
|
|
}
|
|
else if (tmp == RPC_PROGMISMATCH)
|
|
{
|
|
fdbg("RPC_MSGACCEPTED: RPC_PROGMISMATCH error\n");
|
|
return EOPNOTSUPP;
|
|
}
|
|
else if (tmp > 5)
|
|
{
|
|
fdbg("ERROR: Other RPC type: %d\n", tmp);
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
return OK;
|
|
}
|