133 lines
4.7 KiB
C
133 lines
4.7 KiB
C
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/*
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* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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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 modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. 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.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __FS_H__
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#define __FS_H__
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#include "lwip/opt.h"
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#include "lwip/err.h"
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/** Set this to 1 and provide the functions:
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* - "int fs_open_custom(struct fs_file *file, const char *name)"
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* Called first for every opened file to allow opening files
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* that are not included in fsdata(_custom).c
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* - "void fs_close_custom(struct fs_file *file)"
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* Called to free resources allocated by fs_open_custom().
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*/
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#ifndef LWIP_HTTPD_CUSTOM_FILES
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#define LWIP_HTTPD_CUSTOM_FILES 0
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#endif
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/** Set this to 1 to support fs_read() to dynamically read file data.
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* Without this (default=off), only one-block files are supported,
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* and the contents must be ready after fs_open().
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*/
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#ifndef LWIP_HTTPD_DYNAMIC_FILE_READ
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#define LWIP_HTTPD_DYNAMIC_FILE_READ 0
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#endif
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/** Set this to 1 to include an application state argument per file
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* that is opened. This allows to keep a state per connection/file.
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*/
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#ifndef LWIP_HTTPD_FILE_STATE
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#define LWIP_HTTPD_FILE_STATE 0
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#endif
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/** HTTPD_PRECALCULATED_CHECKSUM==1: include precompiled checksums for
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* predefined (MSS-sized) chunks of the files to prevent having to calculate
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* the checksums at runtime. */
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#ifndef HTTPD_PRECALCULATED_CHECKSUM
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#define HTTPD_PRECALCULATED_CHECKSUM 0
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#endif
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/** LWIP_HTTPD_FS_ASYNC_READ==1: support asynchronous read operations
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* (fs_read_async returns FS_READ_DELAYED and calls a callback when finished).
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*/
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#ifndef LWIP_HTTPD_FS_ASYNC_READ
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#define LWIP_HTTPD_FS_ASYNC_READ 0
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#endif
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#define FS_READ_EOF -1
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#define FS_READ_DELAYED -2
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#if HTTPD_PRECALCULATED_CHECKSUM
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struct fsdata_chksum {
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u32_t offset;
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u16_t chksum;
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u16_t len;
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};
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#endif /* HTTPD_PRECALCULATED_CHECKSUM */
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struct fs_file {
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const char *data;
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int len;
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int index;
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void *pextension;
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#if HTTPD_PRECALCULATED_CHECKSUM
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const struct fsdata_chksum *chksum;
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u16_t chksum_count;
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#endif /* HTTPD_PRECALCULATED_CHECKSUM */
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u8_t http_header_included;
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#if LWIP_HTTPD_CUSTOM_FILES
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u8_t is_custom_file;
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#endif /* LWIP_HTTPD_CUSTOM_FILES */
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#if LWIP_HTTPD_FILE_STATE
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void *state;
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#endif /* LWIP_HTTPD_FILE_STATE */
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};
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#if LWIP_HTTPD_FS_ASYNC_READ
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typedef void (*fs_wait_cb)(void *arg);
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#endif /* LWIP_HTTPD_FS_ASYNC_READ */
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err_t fs_open(struct fs_file *file, const char *name);
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void fs_close(struct fs_file *file);
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#if LWIP_HTTPD_DYNAMIC_FILE_READ
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#if LWIP_HTTPD_FS_ASYNC_READ
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int fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
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#else /* LWIP_HTTPD_FS_ASYNC_READ */
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int fs_read(struct fs_file *file, char *buffer, int count);
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#endif /* LWIP_HTTPD_FS_ASYNC_READ */
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#endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
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#if LWIP_HTTPD_FS_ASYNC_READ
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int fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
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#endif /* LWIP_HTTPD_FS_ASYNC_READ */
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int fs_bytes_left(struct fs_file *file);
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#if LWIP_HTTPD_FILE_STATE
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/** This user-defined function is called when a file is opened. */
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void *fs_state_init(struct fs_file *file, const char *name);
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/** This user-defined function is called when a file is closed. */
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void fs_state_free(struct fs_file *file, void *state);
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#endif /* #if LWIP_HTTPD_FILE_STATE */
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#endif /* __FS_H__ */
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