| 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 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 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: |
| 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 |
| 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. |
| 23 | */ |
| 24 | |
| 25 | #include "qemu/osdep.h" |
| 26 | #include "qemu/main-loop.h" |
| 27 | #include "qemu/module.h" |
| 28 | #include "qapi/error.h" |
| 29 | #include "chardev/char-win.h" |
| 30 | |
| 31 | static int win_chr_read(Chardev *chr, DWORD len) |
| 32 | { |
| 33 | WinChardev *s = WIN_CHARDEV(chr); |
| 34 | int max_size = qemu_chr_be_can_write(chr); |
| 35 | int ret, err; |
| 36 | uint8_t buf[CHR_READ_BUF_LEN]; |
| 37 | DWORD size; |
| 38 | |
| 39 | if (len > max_size) { |
| 40 | len = max_size; |
| 41 | } |
| 42 | if (len == 0) { |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | ZeroMemory(&s->orecv, sizeof(s->orecv)); |
| 47 | s->orecv.hEvent = s->hrecv; |
| 48 | ret = ReadFile(s->file, buf, len, &size, &s->orecv); |
| 49 | if (!ret) { |
| 50 | err = GetLastError(); |
| 51 | if (err == ERROR_IO_PENDING) { |
| 52 | ret = GetOverlappedResult(s->file, &s->orecv, &size, TRUE); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | if (size > 0) { |
| 57 | qemu_chr_be_write(chr, buf, size); |
| 58 | } |
| 59 | |
| 60 | return size > 0 ? 1 : 0; |
| 61 | } |
| 62 | |
| 63 | static int win_chr_serial_poll(void *opaque) |
| 64 | { |
| 65 | Chardev *chr = CHARDEV(opaque); |
| 66 | WinChardev *s = WIN_CHARDEV(opaque); |
| 67 | COMSTAT status; |
| 68 | DWORD comerr; |
| 69 | |
| 70 | ClearCommError(s->file, &comerr, &status); |
| 71 | if (status.cbInQue > 0) { |
| 72 | if (win_chr_read(chr, status.cbInQue)) { |
| 73 | return 1; |
| 74 | } |
| 75 | } |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | int win_chr_serial_init(Chardev *chr, const char *filename, Error **errp) |
| 80 | { |
| 81 | WinChardev *s = WIN_CHARDEV(chr); |
| 82 | COMMCONFIG comcfg; |
| 83 | COMMTIMEOUTS cto = { 0, 0, 0, 0, 0}; |
| 84 | COMSTAT comstat; |
| 85 | DWORD size; |
| 86 | DWORD err; |
| 87 | |
| 88 | s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); |
| 89 | if (!s->hsend) { |
| 90 | error_setg(errp, "Failed CreateEvent"); |
| 91 | goto fail; |
| 92 | } |
| 93 | s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); |
| 94 | if (!s->hrecv) { |
| 95 | error_setg(errp, "Failed CreateEvent"); |
| 96 | goto fail; |
| 97 | } |
| 98 | |
| 99 | s->file = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, |
| 100 | OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0); |
| 101 | if (s->file == INVALID_HANDLE_VALUE) { |
| 102 | error_setg_win32(errp, GetLastError(), "Failed CreateFile"); |
| 103 | s->file = NULL; |
| 104 | goto fail; |
| 105 | } |
| 106 | |
| 107 | if (!SetupComm(s->file, NRECVBUF, NSENDBUF)) { |
| 108 | error_setg(errp, "Failed SetupComm"); |
| 109 | goto fail; |
| 110 | } |
| 111 | |
| 112 | ZeroMemory(&comcfg, sizeof(COMMCONFIG)); |
| 113 | size = sizeof(COMMCONFIG); |
| 114 | GetDefaultCommConfig(filename, &comcfg, &size); |
| 115 | comcfg.dcb.DCBlength = sizeof(DCB); |
| 116 | CommConfigDialog(filename, NULL, &comcfg); |
| 117 | |
| 118 | if (!SetCommState(s->file, &comcfg.dcb)) { |
| 119 | error_setg(errp, "Failed SetCommState"); |
| 120 | goto fail; |
| 121 | } |
| 122 | |
| 123 | if (!SetCommMask(s->file, EV_ERR)) { |
| 124 | error_setg(errp, "Failed SetCommMask"); |
| 125 | goto fail; |
| 126 | } |
| 127 | |
| 128 | cto.ReadIntervalTimeout = MAXDWORD; |
| 129 | if (!SetCommTimeouts(s->file, &cto)) { |
| 130 | error_setg(errp, "Failed SetCommTimeouts"); |
| 131 | goto fail; |
| 132 | } |
| 133 | |
| 134 | if (!ClearCommError(s->file, &err, &comstat)) { |
| 135 | error_setg(errp, "Failed ClearCommError"); |
| 136 | goto fail; |
| 137 | } |
| 138 | qemu_add_polling_cb(win_chr_serial_poll, chr); |
| 139 | return 0; |
| 140 | |
| 141 | fail: |
| 142 | return -1; |
| 143 | } |
| 144 | |
| 145 | int win_chr_pipe_poll(void *opaque) |
| 146 | { |
| 147 | Chardev *chr = CHARDEV(opaque); |
| 148 | WinChardev *s = WIN_CHARDEV(opaque); |
| 149 | DWORD size; |
| 150 | |
| 151 | PeekNamedPipe(s->file, NULL, 0, NULL, &size, NULL); |
| 152 | if (size > 0) { |
| 153 | if (win_chr_read(chr, size)) { |
| 154 | return 1; |
| 155 | } |
| 156 | } |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | /* Called with chr_write_lock held. */ |
| 161 | static int win_chr_write(Chardev *chr, const uint8_t *buf, int len1) |
| 162 | { |
| 163 | WinChardev *s = WIN_CHARDEV(chr); |
| 164 | DWORD len, ret, size, err; |
| 165 | |
| 166 | len = len1; |
| 167 | ZeroMemory(&s->osend, sizeof(s->osend)); |
| 168 | s->osend.hEvent = s->hsend; |
| 169 | while (len > 0) { |
| 170 | if (s->hsend) { |
| 171 | ret = WriteFile(s->file, buf, len, &size, &s->osend); |
| 172 | } else { |
| 173 | ret = WriteFile(s->file, buf, len, &size, NULL); |
| 174 | } |
| 175 | if (!ret) { |
| 176 | err = GetLastError(); |
| 177 | if (err == ERROR_IO_PENDING) { |
| 178 | ret = GetOverlappedResult(s->file, &s->osend, &size, TRUE); |
| 179 | if (ret) { |
| 180 | buf += size; |
| 181 | len -= size; |
| 182 | } else { |
| 183 | break; |
| 184 | } |
| 185 | } else { |
| 186 | break; |
| 187 | } |
| 188 | } else { |
| 189 | buf += size; |
| 190 | len -= size; |
| 191 | } |
| 192 | } |
| 193 | return len1 - len; |
| 194 | } |
| 195 | |
| 196 | static void char_win_finalize(Object *obj) |
| 197 | { |
| 198 | Chardev *chr = CHARDEV(obj); |
| 199 | WinChardev *s = WIN_CHARDEV(chr); |
| 200 | |
| 201 | if (s->hsend) { |
| 202 | CloseHandle(s->hsend); |
| 203 | } |
| 204 | if (s->hrecv) { |
| 205 | CloseHandle(s->hrecv); |
| 206 | } |
| 207 | if (!s->keep_open && s->file) { |
| 208 | CloseHandle(s->file); |
| 209 | } |
| 210 | if (s->fpipe) { |
| 211 | qemu_del_polling_cb(win_chr_pipe_poll, chr); |
| 212 | } else { |
| 213 | qemu_del_polling_cb(win_chr_serial_poll, chr); |
| 214 | } |
| 215 | |
| 216 | qemu_chr_be_event(chr, CHR_EVENT_CLOSED); |
| 217 | } |
| 218 | |
| 219 | void win_chr_set_file(Chardev *chr, HANDLE file, bool keep_open) |
| 220 | { |
| 221 | WinChardev *s = WIN_CHARDEV(chr); |
| 222 | |
| 223 | s->keep_open = keep_open; |
| 224 | s->file = file; |
| 225 | } |
| 226 | |
| 227 | static void char_win_class_init(ObjectClass *oc, const void *data) |
| 228 | { |
| 229 | ChardevClass *cc = CHARDEV_CLASS(oc); |
| 230 | |
| 231 | cc->chr_write = win_chr_write; |
| 232 | } |
| 233 | |
| 234 | static const TypeInfo char_win_type_info = { |
| 235 | .name = TYPE_CHARDEV_WIN, |
| 236 | .parent = TYPE_CHARDEV, |
| 237 | .instance_size = sizeof(WinChardev), |
| 238 | .instance_finalize = char_win_finalize, |
| 239 | .class_init = char_win_class_init, |
| 240 | .abstract = true, |
| 241 | }; |
| 242 | |
| 243 | static void register_types(void) |
| 244 | { |
| 245 | type_register_static(&char_win_type_info); |
| 246 | } |
| 247 | |
| 248 | type_init(register_types); |