6a4495e3b7
In file included from local/local_fifo.c:25: In function ‘local_format_name’, inlined from ‘local_hd_name’ at local/local_fifo.c:132:3, inlined from ‘local_open_receiver’ at local/local_fifo.c:661:3: local/local_fifo.c:77:16: warning: ‘%s’ directive output may be truncated writing up to 107 bytes into a region of size 100 [-Wformat-truncation=] 77 | CONFIG_NET_LOCAL_VFS_PATH "/%s%s", inpath, suffix); | ^~~~~~~~~~~~~~~~~~~~~~~~~ local/local_fifo.c: In function ‘local_open_receiver’: local/local_fifo.c:82:44: note: format string is defined here 82 | CONFIG_NET_LOCAL_VFS_PATH "/%s%s%" PRIx32, | ^~ In function ‘local_format_name’, inlined from ‘local_hd_name’ at local/local_fifo.c:132:3, inlined from ‘local_open_receiver’ at local/local_fifo.c:661:3: local/local_fifo.c:76:7: note: ‘snprintf’ output between 12 and 119 bytes into a destination of size 109 76 | snprintf(outpath, LOCAL_FULLPATH_LEN - 1, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 77 | CONFIG_NET_LOCAL_VFS_PATH "/%s%s", inpath, suffix); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: chao an <anchao@xiaomi.com>
734 lines
20 KiB
C
734 lines
20 KiB
C
/****************************************************************************
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* net/local/local_fifo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <nuttx/config.h>
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#if defined(CONFIG_NET) && defined(CONFIG_NET_LOCAL)
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include "local/local.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define LOCAL_CS_SUFFIX "CS" /* Name of the client-to-server FIFO */
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#define LOCAL_SC_SUFFIX "SC" /* Name of the server-to-client FIFO */
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#define LOCAL_HD_SUFFIX "HD" /* Name of the half duplex datagram FIFO */
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#define LOCAL_SUFFIX_LEN 2
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#define LOCAL_FULLPATH_LEN (strlen(CONFIG_NET_LOCAL_VFS_PATH) + \
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UNIX_PATH_MAX + LOCAL_SUFFIX_LEN + 2)
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: local_format_name
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*
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* Description:
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* Format the name of the half duplex FIFO.
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*
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****************************************************************************/
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static void local_format_name(FAR const char *inpath, FAR char *outpath,
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FAR const char *suffix, int32_t id)
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{
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if (strncmp(inpath, CONFIG_NET_LOCAL_VFS_PATH,
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strlen(CONFIG_NET_LOCAL_VFS_PATH)) == 0)
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{
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inpath += strlen(CONFIG_NET_LOCAL_VFS_PATH);
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}
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if (id < 0)
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{
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snprintf(outpath, LOCAL_FULLPATH_LEN - 1,
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CONFIG_NET_LOCAL_VFS_PATH "/%s%s", inpath, suffix);
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}
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else
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{
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snprintf(outpath, LOCAL_FULLPATH_LEN - 1,
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CONFIG_NET_LOCAL_VFS_PATH "/%s%s%" PRIx32,
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inpath, suffix, id);
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}
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outpath[LOCAL_FULLPATH_LEN - 1] = '\0';
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}
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/****************************************************************************
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* Name: local_cs_name
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*
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* Description:
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* Create the name of the client-to-server FIFO.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_STREAM
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static void local_cs_name(FAR struct local_conn_s *conn, FAR char *path)
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{
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local_format_name(conn->lc_path, path,
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LOCAL_CS_SUFFIX, conn->lc_instance_id);
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}
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#endif /* CONFIG_NET_LOCAL_STREAM */
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/****************************************************************************
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* Name: local_sc_name
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*
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* Description:
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* Create the name of the server-to-client FIFO.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_STREAM
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static void local_sc_name(FAR struct local_conn_s *conn, FAR char *path)
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{
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local_format_name(conn->lc_path, path,
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LOCAL_SC_SUFFIX, conn->lc_instance_id);
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}
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#endif /* CONFIG_NET_LOCAL_STREAM */
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/****************************************************************************
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* Name: local_hd_name
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*
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* Description:
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* Create the name of the half duplex, datagram FIFO.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_DGRAM
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static void local_hd_name(FAR const char *inpath, FAR char *outpath)
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{
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local_format_name(inpath, outpath, LOCAL_HD_SUFFIX, -1);
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}
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#endif /* CONFIG_NET_LOCAL_DGRAM */
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/****************************************************************************
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* Name: local_fifo_exists
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*
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* Description:
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* Check if a FIFO exists.
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*
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****************************************************************************/
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static bool local_fifo_exists(FAR const char *path)
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{
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struct stat buf;
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int ret;
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/* Create the client-to-server FIFO */
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ret = nx_stat(path, &buf, 1);
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if (ret < 0)
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{
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return false;
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}
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/* FIFOs are character devices in NuttX. Return true if what we found
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* is a FIFO. What if it is something else? In that case, we will
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* return false and mkfifo() will fail.
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*/
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return (bool)S_ISCHR(buf.st_mode);
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}
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/****************************************************************************
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* Name: local_create_fifo
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*
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* Description:
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* Create the one FIFO.
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*
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****************************************************************************/
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static int local_create_fifo(FAR const char *path)
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{
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int ret;
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/* Create the client-to-server FIFO if it does not already exist. */
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if (!local_fifo_exists(path))
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{
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ret = nx_mkfifo(path, 0644, CONFIG_DEV_FIFO_SIZE);
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if (ret < 0)
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{
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nerr("ERROR: Failed to create FIFO %s: %d\n", path, ret);
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return ret;
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}
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}
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/* The FIFO (or some character driver) exists at PATH or we successfully
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* created the FIFO at that location.
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*/
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return OK;
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}
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/****************************************************************************
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* Name: local_release_fifo
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*
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* Description:
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* Release a reference from one of the FIFOs used in a connection.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_STREAM /* Currently not used by datagram code */
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static int local_release_fifo(FAR const char *path)
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{
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int ret;
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/* Unlink the client-to-server FIFO if it exists. */
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if (local_fifo_exists(path))
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{
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/* Un-linking the FIFO removes the FIFO from the namespace. It will
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* also mark the FIFO device "unlinked". When all of the open
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* references to the FIFO device are closed, the resources consumed
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* by the device instance will also be freed.
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*/
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ret = nx_unlink(path);
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if (ret < 0)
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{
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nerr("ERROR: Failed to unlink FIFO %s: %d\n", path, ret);
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return ret;
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}
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}
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/* The FIFO does not exist or we successfully unlinked it. */
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return OK;
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}
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#endif
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/****************************************************************************
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* Name: local_rx_open
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*
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* Description:
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* Open a FIFO for read-only access.
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*
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****************************************************************************/
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static int local_rx_open(FAR struct local_conn_s *conn, FAR const char *path,
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bool nonblock)
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{
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int oflags = nonblock ? O_RDONLY | O_NONBLOCK : O_RDONLY;
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int ret;
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ret = file_open(&conn->lc_infile, path, oflags);
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if (ret < 0)
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{
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nerr("ERROR: Failed on open %s for reading: %d\n",
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path, ret);
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/* Map the error code to something consistent with the return
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* error codes from connect():
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*
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* If error is ENOENT, meaning that the FIFO does exist,
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* return EFAULT meaning that the socket structure address is
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* outside the user's address space.
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*/
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return ret == -ENOENT ? -EFAULT : ret;
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}
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return OK;
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}
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/****************************************************************************
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* Name: local_tx_open
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*
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* Description:
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* Open a FIFO for write-only access.
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*
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****************************************************************************/
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static int local_tx_open(FAR struct local_conn_s *conn, FAR const char *path,
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bool nonblock)
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{
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int ret;
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ret = file_open(&conn->lc_outfile, path, O_WRONLY | O_NONBLOCK);
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if (ret < 0)
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{
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nerr("ERROR: Failed on open %s for writing: %d\n",
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path, ret);
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/* Map the error code to something consistent with the return
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* error codes from connect():
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*
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* If error is ENOENT, meaning that the FIFO does exist,
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* return EFAULT meaning that the socket structure address is
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* outside the user's address space.
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*/
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return ret == -ENOENT ? -EFAULT : ret;
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}
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/* Clear O_NONBLOCK if it's meant to be blocking */
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if (nonblock == false)
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{
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ret = file_fcntl(&conn->lc_outfile, F_SETFL, O_WRONLY);
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if (ret < 0)
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{
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return ret;
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}
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}
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return OK;
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}
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/****************************************************************************
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* Name: local_set_policy
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*
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* Description:
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* Set the FIFO buffer policy:
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*
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* 0=Free FIFO resources when the last reference is closed
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* 1=Free FIFO resources when the buffer is empty.
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*
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****************************************************************************/
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static int local_set_policy(FAR struct file *filep, unsigned long policy)
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{
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int ret;
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/* Set the buffer policy */
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ret = file_ioctl(filep, PIPEIOC_POLICY, policy);
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if (ret < 0)
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{
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nerr("ERROR: Failed to set FIFO buffer policy: %d\n", ret);
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}
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return ret;
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}
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/****************************************************************************
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* Name: local_set_pollinthreshold
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*
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* Description:
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* Set the local pollin threshold:
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_DGRAM
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static int local_set_pollinthreshold(FAR struct file *filep,
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unsigned long threshold)
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{
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int ret;
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/* Set the buffer poll threshold */
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ret = file_ioctl(filep, PIPEIOC_POLLINTHRD, threshold);
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if (ret < 0)
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{
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nerr("ERROR: Failed to set FIFO pollin threshold: %lu\n",
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threshold);
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}
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return ret;
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}
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#endif /* CONFIG_NET_LOCAL_DGRAM */
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/****************************************************************************
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* Name: local_set_polloutthreshold
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*
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* Description:
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* Set the local pollout threshold:
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_DGRAM
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static int local_set_polloutthreshold(FAR struct file *filep,
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unsigned long threshold)
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{
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int ret;
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/* Set the buffer poll threshold */
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ret = file_ioctl(filep, PIPEIOC_POLLOUTTHRD, threshold);
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if (ret < 0)
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{
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nerr("ERROR: Failed to set FIFO pollout threshold: %lu\n",
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threshold);
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}
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return ret;
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}
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#endif /* CONFIG_NET_LOCAL_DGRAM */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: local_create_fifos
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*
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* Description:
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* Create the FIFO pair needed for a SOCK_STREAM connection.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_STREAM
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int local_create_fifos(FAR struct local_conn_s *conn)
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{
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char path[LOCAL_FULLPATH_LEN];
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int ret;
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/* Create the client-to-server FIFO if it does not already exist. */
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local_cs_name(conn, path);
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ret = local_create_fifo(path);
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if (ret >= 0)
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{
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/* Create the server-to-client FIFO if it does not already exist. */
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local_sc_name(conn, path);
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ret = local_create_fifo(path);
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}
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return ret;
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}
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#endif /* CONFIG_NET_LOCAL_STREAM */
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|
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/****************************************************************************
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* Name: local_create_halfduplex
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*
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* Description:
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* Create the half-duplex FIFO needed for SOCK_DGRAM communication.
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*
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****************************************************************************/
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#ifdef CONFIG_NET_LOCAL_DGRAM
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int local_create_halfduplex(FAR struct local_conn_s *conn,
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FAR const char *path)
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{
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char fullpath[LOCAL_FULLPATH_LEN];
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|
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/* Create the half duplex FIFO if it does not already exist. */
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local_hd_name(path, fullpath);
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return local_create_fifo(fullpath);
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}
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#endif /* CONFIG_NET_LOCAL_DGRAM */
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|
|
/****************************************************************************
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* Name: local_release_fifos
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*
|
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* Description:
|
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* Release references to the FIFO pair used for a SOCK_STREAM connection.
|
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*
|
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****************************************************************************/
|
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|
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#ifdef CONFIG_NET_LOCAL_STREAM
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int local_release_fifos(FAR struct local_conn_s *conn)
|
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{
|
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char path[LOCAL_FULLPATH_LEN];
|
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int ret1;
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int ret2;
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|
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/* Destroy the client-to-server FIFO if it exists. */
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|
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local_sc_name(conn, path);
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ret1 = local_release_fifo(path);
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|
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/* Destroy the server-to-client FIFO if it exists. */
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|
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local_cs_name(conn, path);
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ret2 = local_release_fifo(path);
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|
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/* Return a failure if one occurred. */
|
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|
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return ret1 < 0 ? ret1 : ret2;
|
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}
|
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#endif /* CONFIG_NET_LOCAL_STREAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_release_halfduplex
|
|
*
|
|
* Description:
|
|
* Release a reference to the FIFO used for SOCK_DGRAM communication
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_DGRAM
|
|
int local_release_halfduplex(FAR struct local_conn_s *conn)
|
|
{
|
|
#if 1
|
|
/* REVISIT: We need to think about this carefully. Unlike the connection-
|
|
* oriented Unix domain socket, we don't really know the best time to
|
|
* release the FIFO resource. It would be extremely inefficient to create
|
|
* and destroy the FIFO on each packet. But, on the other hand, failing
|
|
* to destroy the FIFO will leave the FIFO resources in place after the
|
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* communications have completed.
|
|
*
|
|
* I am thinking that there should be something like a timer. The timer
|
|
* would be started at the completion of each transfer and cancelled at
|
|
* the beginning of each transfer. If the timer expires, then the FIFO
|
|
* would be destroyed.
|
|
*/
|
|
|
|
/* #warning Missing logic */
|
|
|
|
return OK;
|
|
|
|
#else
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
|
|
/* Destroy the half duplex FIFO if it exists. */
|
|
|
|
local_hd_name(conn->lc_path, path);
|
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return local_release_fifo(path);
|
|
#endif
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_DGRAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_client_rx
|
|
*
|
|
* Description:
|
|
* Open the client-side of the server-to-client FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_STREAM
|
|
int local_open_client_rx(FAR struct local_conn_s *client, bool nonblock)
|
|
{
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the server-to-client path name */
|
|
|
|
local_sc_name(client, path);
|
|
|
|
/* Then open the file for read-only access */
|
|
|
|
ret = local_rx_open(client, path, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the last reference is closed */
|
|
|
|
ret = local_set_policy(&client->lc_infile, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_STREAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_client_tx
|
|
*
|
|
* Description:
|
|
* Open the client-side of the client-to-server FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_STREAM
|
|
int local_open_client_tx(FAR struct local_conn_s *client, bool nonblock)
|
|
{
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the client-to-server path name */
|
|
|
|
local_cs_name(client, path);
|
|
|
|
/* Then open the file for write-only access */
|
|
|
|
ret = local_tx_open(client, path, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the last reference is closed */
|
|
|
|
ret = local_set_policy(&client->lc_outfile, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_STREAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_server_rx
|
|
*
|
|
* Description:
|
|
* Open the server-side of the client-to-server FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_STREAM
|
|
int local_open_server_rx(FAR struct local_conn_s *server, bool nonblock)
|
|
{
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the client-to-server path name */
|
|
|
|
local_cs_name(server, path);
|
|
|
|
/* Then open the file for write-only access */
|
|
|
|
ret = local_rx_open(server, path, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the last reference is closed */
|
|
|
|
ret = local_set_policy(&server->lc_infile, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_STREAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_server_tx
|
|
*
|
|
* Description:
|
|
* Only the server-side of the server-to-client FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_STREAM
|
|
int local_open_server_tx(FAR struct local_conn_s *server, bool nonblock)
|
|
{
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the server-to-client path name */
|
|
|
|
local_sc_name(server, path);
|
|
|
|
/* Then open the file for read-only access */
|
|
|
|
ret = local_tx_open(server, path, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the last reference is closed */
|
|
|
|
ret = local_set_policy(&server->lc_outfile, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_STREAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_receiver
|
|
*
|
|
* Description:
|
|
* Only the receiving side of the half duplex FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_DGRAM
|
|
int local_open_receiver(FAR struct local_conn_s *conn, bool nonblock)
|
|
{
|
|
char path[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the server-to-client path name */
|
|
|
|
local_hd_name(conn->lc_path, path);
|
|
|
|
/* Then open the file for read-only access */
|
|
|
|
ret = local_rx_open(conn, path, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the buffer is empty. */
|
|
|
|
ret = local_set_policy(&conn->lc_infile, 1);
|
|
|
|
if (ret == 0)
|
|
{
|
|
/* Set POLLOUT threshold bigger than preamble len.
|
|
* This is to avoid non-blocking read failed with -EAGAIN when
|
|
* only preamble len is sent and read by reader.
|
|
*/
|
|
|
|
ret = local_set_polloutthreshold(&conn->lc_infile,
|
|
sizeof(uint16_t));
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_DGRAM */
|
|
|
|
/****************************************************************************
|
|
* Name: local_open_sender
|
|
*
|
|
* Description:
|
|
* Only the sending side of the half duplex FIFO.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_LOCAL_DGRAM
|
|
int local_open_sender(FAR struct local_conn_s *conn, FAR const char *path,
|
|
bool nonblock)
|
|
{
|
|
char fullpath[LOCAL_FULLPATH_LEN];
|
|
int ret;
|
|
|
|
/* Get the server-to-client path name */
|
|
|
|
local_hd_name(path, fullpath);
|
|
|
|
/* Then open the file for read-only access */
|
|
|
|
ret = local_tx_open(conn, fullpath, nonblock);
|
|
if (ret == OK)
|
|
{
|
|
/* Policy: Free FIFO resources when the buffer is empty. */
|
|
|
|
ret = local_set_policy(&conn->lc_outfile, 1);
|
|
if (ret == 0)
|
|
{
|
|
/* Set POLLIN threshold bigger than preamble len.
|
|
* This is to avoid non-blocking read failed with -EAGAIN when
|
|
* only preamble len is sent and read by reader.
|
|
*/
|
|
|
|
ret = local_set_pollinthreshold(&conn->lc_outfile,
|
|
sizeof(uint16_t));
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_LOCAL_DGRAM */
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_LOCAL */
|