1/*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
26#define _WINSOCK_DEPRECATED_NO_WARNINGS
27#endif
28#include "private-lib-core.h"
29
30int lws_plat_apply_FD_CLOEXEC(int n)
31{
32	return 0;
33}
34
35lws_fop_fd_t
36_lws_plat_file_open(const struct lws_plat_file_ops *fops, const char *filename,
37		    const char *vpath, lws_fop_flags_t *flags)
38{
39	HANDLE ret;
40	WCHAR buf[MAX_PATH];
41	lws_fop_fd_t fop_fd;
42	LARGE_INTEGER llFileSize = {0};
43
44	MultiByteToWideChar(CP_UTF8, 0, filename, -1, buf, LWS_ARRAY_SIZE(buf));
45	if (((*flags) & 7) == _O_RDONLY)
46		ret = CreateFileW(buf, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
47				  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
48	else
49		ret = CreateFileW(buf, GENERIC_WRITE, 0, NULL,
50				  CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
51
52	if (ret == NULL)
53		goto bail;
54
55	fop_fd = malloc(sizeof(*fop_fd));
56	if (!fop_fd)
57		goto bail;
58
59	fop_fd->fops = fops;
60#if defined(__MINGW32__)
61	/* we use filesystem_priv */
62	fop_fd->fd = (int)(intptr_t)ret;
63#else
64	fop_fd->fd = ret;
65#endif
66	fop_fd->filesystem_priv = ret;
67	fop_fd->flags = *flags;
68	fop_fd->len = GetFileSize(ret, NULL);
69	if(GetFileSizeEx(ret, &llFileSize))
70		fop_fd->len = llFileSize.QuadPart;
71
72	fop_fd->pos = 0;
73
74	return fop_fd;
75
76bail:
77	return NULL;
78}
79
80int
81_lws_plat_file_close(lws_fop_fd_t *fop_fd)
82{
83	HANDLE fd = (*fop_fd)->filesystem_priv;
84
85	free(*fop_fd);
86	*fop_fd = NULL;
87
88	CloseHandle((HANDLE)fd);
89
90	return 0;
91}
92
93lws_fileofs_t
94_lws_plat_file_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
95{
96	LARGE_INTEGER l;
97
98	l.QuadPart = offset;
99	if (!SetFilePointerEx((HANDLE)fop_fd->filesystem_priv, l, NULL, FILE_CURRENT))
100	{
101		lwsl_err("error seeking from cur %ld, offset %ld\n", (long)fop_fd->pos, (long)offset);
102		return -1;
103	}
104
105	LARGE_INTEGER zero;
106	zero.QuadPart = 0;
107	LARGE_INTEGER newPos;
108	if (!SetFilePointerEx((HANDLE)fop_fd->filesystem_priv, zero, &newPos, FILE_CURRENT))
109	{
110		lwsl_err("error seeking from cur %ld, offset %ld\n", (long)fop_fd->pos, (long)offset);
111		return -1;
112	}
113	fop_fd->pos = newPos.QuadPart;
114
115	return newPos.QuadPart;
116}
117
118int
119_lws_plat_file_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
120		    uint8_t *buf, lws_filepos_t len)
121{
122	DWORD _amount;
123
124	if (!ReadFile((HANDLE)fop_fd->filesystem_priv, buf, (DWORD)len, &_amount, NULL)) {
125		*amount = 0;
126
127		return 1;
128	}
129
130	fop_fd->pos += _amount;
131	*amount = (unsigned long)_amount;
132
133	return 0;
134}
135
136int
137_lws_plat_file_write(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
138			 uint8_t* buf, lws_filepos_t len)
139{
140	DWORD _amount;
141
142	if (!WriteFile((HANDLE)fop_fd->filesystem_priv, buf, (DWORD)len, &_amount, NULL)) {
143		*amount = 0;
144
145		return 1;
146	}
147
148	fop_fd->pos += _amount;
149	*amount = (unsigned long)_amount;
150
151	return 0;
152}
153
154
155int
156lws_plat_write_cert(struct lws_vhost *vhost, int is_key, int fd, void *buf,
157			size_t len)
158{
159	int n;
160
161	n = (int)write(fd, buf, (unsigned int)len);
162
163	lseek(fd, 0, SEEK_SET);
164
165	return (size_t)n != len;
166}
167
168int
169lws_plat_write_file(const char *filename, void *buf, size_t len)
170{
171	int m, fd;
172
173	fd = lws_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
174
175	if (fd == -1)
176		return -1;
177
178	m = (int)write(fd, buf, (unsigned int)len);
179	close(fd);
180
181	return (size_t)m != len;
182}
183
184int
185lws_plat_read_file(const char *filename, void *buf, size_t len)
186{
187	int n, fd = lws_open(filename, O_RDONLY);
188	if (fd == -1)
189		return -1;
190
191	n = (int)read(fd, buf, (unsigned int)len);
192	close(fd);
193
194	return n;
195}
196
197