BadVPN – Blame information for rev 1

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1 office 1 /*
2 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32  
33 #include "lwip/apps/httpd_opts.h"
34 #include "lwip/def.h"
35 #include "lwip/apps/fs.h"
36 #include <string.h>
37  
38  
39 #include HTTPD_FSDATA_FILE
40  
41 /*-----------------------------------------------------------------------------------*/
42  
43 #if LWIP_HTTPD_CUSTOM_FILES
44 int fs_open_custom(struct fs_file *file, const char *name);
45 void fs_close_custom(struct fs_file *file);
46 #if LWIP_HTTPD_FS_ASYNC_READ
47 u8_t fs_canread_custom(struct fs_file *file);
48 u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
49 int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
50 #else /* LWIP_HTTPD_FS_ASYNC_READ */
51 int fs_read_custom(struct fs_file *file, char *buffer, int count);
52 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
53 #endif /* LWIP_HTTPD_CUSTOM_FILES */
54  
55 /*-----------------------------------------------------------------------------------*/
56 err_t
57 fs_open(struct fs_file *file, const char *name)
58 {
59 const struct fsdata_file *f;
60  
61 if ((file == NULL) || (name == NULL)) {
62 return ERR_ARG;
63 }
64  
65 #if LWIP_HTTPD_CUSTOM_FILES
66 if (fs_open_custom(file, name)) {
67 file->is_custom_file = 1;
68 return ERR_OK;
69 }
70 file->is_custom_file = 0;
71 #endif /* LWIP_HTTPD_CUSTOM_FILES */
72  
73 for (f = FS_ROOT; f != NULL; f = f->next) {
74 if (!strcmp(name, (const char *)f->name)) {
75 file->data = (const char *)f->data;
76 file->len = f->len;
77 file->index = f->len;
78 file->pextension = NULL;
79 file->flags = f->flags;
80 #if HTTPD_PRECALCULATED_CHECKSUM
81 file->chksum_count = f->chksum_count;
82 file->chksum = f->chksum;
83 #endif /* HTTPD_PRECALCULATED_CHECKSUM */
84 #if LWIP_HTTPD_FILE_STATE
85 file->state = fs_state_init(file, name);
86 #endif /* #if LWIP_HTTPD_FILE_STATE */
87 return ERR_OK;
88 }
89 }
90 /* file not found */
91 return ERR_VAL;
92 }
93  
94 /*-----------------------------------------------------------------------------------*/
95 void
96 fs_close(struct fs_file *file)
97 {
98 #if LWIP_HTTPD_CUSTOM_FILES
99 if (file->is_custom_file) {
100 fs_close_custom(file);
101 }
102 #endif /* LWIP_HTTPD_CUSTOM_FILES */
103 #if LWIP_HTTPD_FILE_STATE
104 fs_state_free(file, file->state);
105 #endif /* #if LWIP_HTTPD_FILE_STATE */
106 LWIP_UNUSED_ARG(file);
107 }
108 /*-----------------------------------------------------------------------------------*/
109 #if LWIP_HTTPD_DYNAMIC_FILE_READ
110 #if LWIP_HTTPD_FS_ASYNC_READ
111 int
112 fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg)
113 #else /* LWIP_HTTPD_FS_ASYNC_READ */
114 int
115 fs_read(struct fs_file *file, char *buffer, int count)
116 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
117 {
118 int read;
119 if (file->index == file->len) {
120 return FS_READ_EOF;
121 }
122 #if LWIP_HTTPD_FS_ASYNC_READ
123 LWIP_UNUSED_ARG(callback_fn);
124 LWIP_UNUSED_ARG(callback_arg);
125 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
126 #if LWIP_HTTPD_CUSTOM_FILES
127 if (file->is_custom_file) {
128 #if LWIP_HTTPD_FS_ASYNC_READ
129 return fs_read_async_custom(file, buffer, count, callback_fn, callback_arg);
130 #else /* LWIP_HTTPD_FS_ASYNC_READ */
131 return fs_read_custom(file, buffer, count);
132 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
133 }
134 #endif /* LWIP_HTTPD_CUSTOM_FILES */
135  
136 read = file->len - file->index;
137 if (read > count) {
138 read = count;
139 }
140  
141 MEMCPY(buffer, (file->data + file->index), read);
142 file->index += read;
143  
144 return (read);
145 }
146 #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
147 /*-----------------------------------------------------------------------------------*/
148 #if LWIP_HTTPD_FS_ASYNC_READ
149 int
150 fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg)
151 {
152 if (file != NULL) {
153 #if LWIP_HTTPD_FS_ASYNC_READ
154 #if LWIP_HTTPD_CUSTOM_FILES
155 if (!fs_canread_custom(file)) {
156 if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
157 return 0;
158 }
159 }
160 #else /* LWIP_HTTPD_CUSTOM_FILES */
161 LWIP_UNUSED_ARG(callback_fn);
162 LWIP_UNUSED_ARG(callback_arg);
163 #endif /* LWIP_HTTPD_CUSTOM_FILES */
164 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
165 }
166 return 1;
167 }
168 #endif /* LWIP_HTTPD_FS_ASYNC_READ */
169 /*-----------------------------------------------------------------------------------*/
170 int
171 fs_bytes_left(struct fs_file *file)
172 {
173 return file->len - file->index;
174 }