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-common.h" |
27 | #include "qapi/error.h" |
28 | #include "qemu/main-loop.h" |
29 | #include "qemu/module.h" |
30 | #include "qemu/option.h" |
31 | #include "chardev/char.h" |
32 | |
33 | #ifdef _WIN32 |
34 | #include "chardev/char-win.h" |
35 | #else |
36 | #include "chardev/char-fd.h" |
37 | #endif |
38 | |
39 | #ifdef _WIN32 |
40 | #define MAXCONNECT 1 |
41 | #define NTIMEOUT 5000 |
42 | |
43 | static int win_chr_pipe_init(Chardev *chr, const char *filename, |
44 | Error **errp) |
45 | { |
46 | WinChardev *s = WIN_CHARDEV(chr); |
47 | OVERLAPPED ov; |
48 | int ret; |
49 | DWORD size; |
50 | char *openname; |
51 | |
52 | s->fpipe = TRUE; |
53 | |
54 | s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL); |
55 | if (!s->hsend) { |
56 | error_setg(errp, "Failed CreateEvent" ); |
57 | goto fail; |
58 | } |
59 | s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL); |
60 | if (!s->hrecv) { |
61 | error_setg(errp, "Failed CreateEvent" ); |
62 | goto fail; |
63 | } |
64 | |
65 | openname = g_strdup_printf("\\\\.\\pipe\\%s" , filename); |
66 | s->file = CreateNamedPipe(openname, |
67 | PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, |
68 | PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | |
69 | PIPE_WAIT, |
70 | MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL); |
71 | g_free(openname); |
72 | if (s->file == INVALID_HANDLE_VALUE) { |
73 | error_setg(errp, "Failed CreateNamedPipe (%lu)" , GetLastError()); |
74 | s->file = NULL; |
75 | goto fail; |
76 | } |
77 | |
78 | ZeroMemory(&ov, sizeof(ov)); |
79 | ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
80 | ret = ConnectNamedPipe(s->file, &ov); |
81 | if (ret) { |
82 | error_setg(errp, "Failed ConnectNamedPipe" ); |
83 | goto fail; |
84 | } |
85 | |
86 | ret = GetOverlappedResult(s->file, &ov, &size, TRUE); |
87 | if (!ret) { |
88 | error_setg(errp, "Failed GetOverlappedResult" ); |
89 | if (ov.hEvent) { |
90 | CloseHandle(ov.hEvent); |
91 | ov.hEvent = NULL; |
92 | } |
93 | goto fail; |
94 | } |
95 | |
96 | if (ov.hEvent) { |
97 | CloseHandle(ov.hEvent); |
98 | ov.hEvent = NULL; |
99 | } |
100 | qemu_add_polling_cb(win_chr_pipe_poll, chr); |
101 | return 0; |
102 | |
103 | fail: |
104 | return -1; |
105 | } |
106 | |
107 | static void qemu_chr_open_pipe(Chardev *chr, |
108 | ChardevBackend *backend, |
109 | bool *be_opened, |
110 | Error **errp) |
111 | { |
112 | ChardevHostdev *opts = backend->u.pipe.data; |
113 | const char *filename = opts->device; |
114 | |
115 | if (win_chr_pipe_init(chr, filename, errp) < 0) { |
116 | return; |
117 | } |
118 | } |
119 | |
120 | #else |
121 | |
122 | static void qemu_chr_open_pipe(Chardev *chr, |
123 | ChardevBackend *backend, |
124 | bool *be_opened, |
125 | Error **errp) |
126 | { |
127 | ChardevHostdev *opts = backend->u.pipe.data; |
128 | int fd_in, fd_out; |
129 | char *filename_in; |
130 | char *filename_out; |
131 | const char *filename = opts->device; |
132 | |
133 | filename_in = g_strdup_printf("%s.in" , filename); |
134 | filename_out = g_strdup_printf("%s.out" , filename); |
135 | TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY)); |
136 | TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY)); |
137 | g_free(filename_in); |
138 | g_free(filename_out); |
139 | if (fd_in < 0 || fd_out < 0) { |
140 | if (fd_in >= 0) { |
141 | close(fd_in); |
142 | } |
143 | if (fd_out >= 0) { |
144 | close(fd_out); |
145 | } |
146 | TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); |
147 | if (fd_in < 0) { |
148 | error_setg_file_open(errp, errno, filename); |
149 | return; |
150 | } |
151 | } |
152 | qemu_chr_open_fd(chr, fd_in, fd_out); |
153 | } |
154 | |
155 | #endif /* !_WIN32 */ |
156 | |
157 | static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend, |
158 | Error **errp) |
159 | { |
160 | const char *device = qemu_opt_get(opts, "path" ); |
161 | ChardevHostdev *dev; |
162 | |
163 | if (device == NULL) { |
164 | error_setg(errp, "chardev: pipe: no device path given" ); |
165 | return; |
166 | } |
167 | backend->type = CHARDEV_BACKEND_KIND_PIPE; |
168 | dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1); |
169 | qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev)); |
170 | dev->device = g_strdup(device); |
171 | } |
172 | |
173 | static void char_pipe_class_init(ObjectClass *oc, void *data) |
174 | { |
175 | ChardevClass *cc = CHARDEV_CLASS(oc); |
176 | |
177 | cc->parse = qemu_chr_parse_pipe; |
178 | cc->open = qemu_chr_open_pipe; |
179 | } |
180 | |
181 | static const TypeInfo char_pipe_type_info = { |
182 | .name = TYPE_CHARDEV_PIPE, |
183 | #ifdef _WIN32 |
184 | .parent = TYPE_CHARDEV_WIN, |
185 | #else |
186 | .parent = TYPE_CHARDEV_FD, |
187 | #endif |
188 | .class_init = char_pipe_class_init, |
189 | }; |
190 | |
191 | static void register_types(void) |
192 | { |
193 | type_register_static(&char_pipe_type_info); |
194 | } |
195 | |
196 | type_init(register_types); |
197 | |