crypto: expose encryption sector size in APIs
[qemu/kevin.git] / chardev / char-win.c
blob05518e095822c2a7ec97192e0ea6802d31eb8fbf
1 /*
2 * QEMU System Emulator
4 * Copyright (c) 2003-2008 Fabrice Bellard
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 deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
24 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "qapi/error.h"
27 #include "chardev/char-win.h"
29 static void win_chr_read(Chardev *chr, DWORD len)
31 WinChardev *s = WIN_CHARDEV(chr);
32 int max_size = qemu_chr_be_can_write(chr);
33 int ret, err;
34 uint8_t buf[CHR_READ_BUF_LEN];
35 DWORD size;
37 if (len > max_size) {
38 len = max_size;
40 if (len == 0) {
41 return;
44 ZeroMemory(&s->orecv, sizeof(s->orecv));
45 s->orecv.hEvent = s->hrecv;
46 ret = ReadFile(s->file, buf, len, &size, &s->orecv);
47 if (!ret) {
48 err = GetLastError();
49 if (err == ERROR_IO_PENDING) {
50 ret = GetOverlappedResult(s->file, &s->orecv, &size, TRUE);
54 if (size > 0) {
55 qemu_chr_be_write(chr, buf, size);
59 static int win_chr_serial_poll(void *opaque)
61 Chardev *chr = CHARDEV(opaque);
62 WinChardev *s = WIN_CHARDEV(opaque);
63 COMSTAT status;
64 DWORD comerr;
66 ClearCommError(s->file, &comerr, &status);
67 if (status.cbInQue > 0) {
68 win_chr_read(chr, status.cbInQue);
69 return 1;
71 return 0;
74 int win_chr_serial_init(Chardev *chr, const char *filename, Error **errp)
76 WinChardev *s = WIN_CHARDEV(chr);
77 COMMCONFIG comcfg;
78 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
79 COMSTAT comstat;
80 DWORD size;
81 DWORD err;
83 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
84 if (!s->hsend) {
85 error_setg(errp, "Failed CreateEvent");
86 goto fail;
88 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
89 if (!s->hrecv) {
90 error_setg(errp, "Failed CreateEvent");
91 goto fail;
94 s->file = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
95 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
96 if (s->file == INVALID_HANDLE_VALUE) {
97 error_setg(errp, "Failed CreateFile (%lu)", GetLastError());
98 s->file = NULL;
99 goto fail;
102 if (!SetupComm(s->file, NRECVBUF, NSENDBUF)) {
103 error_setg(errp, "Failed SetupComm");
104 goto fail;
107 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
108 size = sizeof(COMMCONFIG);
109 GetDefaultCommConfig(filename, &comcfg, &size);
110 comcfg.dcb.DCBlength = sizeof(DCB);
111 CommConfigDialog(filename, NULL, &comcfg);
113 if (!SetCommState(s->file, &comcfg.dcb)) {
114 error_setg(errp, "Failed SetCommState");
115 goto fail;
118 if (!SetCommMask(s->file, EV_ERR)) {
119 error_setg(errp, "Failed SetCommMask");
120 goto fail;
123 cto.ReadIntervalTimeout = MAXDWORD;
124 if (!SetCommTimeouts(s->file, &cto)) {
125 error_setg(errp, "Failed SetCommTimeouts");
126 goto fail;
129 if (!ClearCommError(s->file, &err, &comstat)) {
130 error_setg(errp, "Failed ClearCommError");
131 goto fail;
133 qemu_add_polling_cb(win_chr_serial_poll, chr);
134 return 0;
136 fail:
137 return -1;
140 int win_chr_pipe_poll(void *opaque)
142 Chardev *chr = CHARDEV(opaque);
143 WinChardev *s = WIN_CHARDEV(opaque);
144 DWORD size;
146 PeekNamedPipe(s->file, NULL, 0, NULL, &size, NULL);
147 if (size > 0) {
148 win_chr_read(chr, size);
149 return 1;
151 return 0;
154 /* Called with chr_write_lock held. */
155 static int win_chr_write(Chardev *chr, const uint8_t *buf, int len1)
157 WinChardev *s = WIN_CHARDEV(chr);
158 DWORD len, ret, size, err;
160 len = len1;
161 ZeroMemory(&s->osend, sizeof(s->osend));
162 s->osend.hEvent = s->hsend;
163 while (len > 0) {
164 if (s->hsend) {
165 ret = WriteFile(s->file, buf, len, &size, &s->osend);
166 } else {
167 ret = WriteFile(s->file, buf, len, &size, NULL);
169 if (!ret) {
170 err = GetLastError();
171 if (err == ERROR_IO_PENDING) {
172 ret = GetOverlappedResult(s->file, &s->osend, &size, TRUE);
173 if (ret) {
174 buf += size;
175 len -= size;
176 } else {
177 break;
179 } else {
180 break;
182 } else {
183 buf += size;
184 len -= size;
187 return len1 - len;
190 static void char_win_finalize(Object *obj)
192 Chardev *chr = CHARDEV(obj);
193 WinChardev *s = WIN_CHARDEV(chr);
195 if (s->hsend) {
196 CloseHandle(s->hsend);
198 if (s->hrecv) {
199 CloseHandle(s->hrecv);
201 if (!s->keep_open && s->file) {
202 CloseHandle(s->file);
204 if (s->fpipe) {
205 qemu_del_polling_cb(win_chr_pipe_poll, chr);
206 } else {
207 qemu_del_polling_cb(win_chr_serial_poll, chr);
210 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
213 void win_chr_set_file(Chardev *chr, HANDLE file, bool keep_open)
215 WinChardev *s = WIN_CHARDEV(chr);
217 s->keep_open = keep_open;
218 s->file = file;
221 static void char_win_class_init(ObjectClass *oc, void *data)
223 ChardevClass *cc = CHARDEV_CLASS(oc);
225 cc->chr_write = win_chr_write;
228 static const TypeInfo char_win_type_info = {
229 .name = TYPE_CHARDEV_WIN,
230 .parent = TYPE_CHARDEV,
231 .instance_size = sizeof(WinChardev),
232 .instance_finalize = char_win_finalize,
233 .class_init = char_win_class_init,
234 .abstract = true,
237 static void register_types(void)
239 type_register_static(&char_win_type_info);
242 type_init(register_types);