1#ifndef QEMU_CHAR_H
2#define QEMU_CHAR_H
3
4#include "qapi/qapi-types-char.h"
5#include "qemu/bitmap.h"
6#include "qemu/thread.h"
7#include "qom/object.h"
8
9#define IAC_EOR 239
10#define IAC_SE 240
11#define IAC_NOP 241
12#define IAC_BREAK 243
13#define IAC_IP 244
14#define IAC_SB 250
15#define IAC 255
16
17
18typedef struct CharBackend CharBackend;
19
20typedef enum {
21 CHR_EVENT_BREAK,
22 CHR_EVENT_OPENED,
23 CHR_EVENT_MUX_IN,
24 CHR_EVENT_MUX_OUT,
25 CHR_EVENT_CLOSED
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33
34
35} QEMUChrEvent;
36
37#define CHR_READ_BUF_LEN 4096
38
39typedef enum {
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42
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44 QEMU_CHAR_FEATURE_RECONNECTABLE,
45
46
47 QEMU_CHAR_FEATURE_FD_PASS,
48
49 QEMU_CHAR_FEATURE_REPLAY,
50
51
52 QEMU_CHAR_FEATURE_GCONTEXT,
53
54 QEMU_CHAR_FEATURE_LAST,
55} ChardevFeature;
56
57#define qemu_chr_replay(chr) qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_REPLAY)
58
59struct Chardev {
60 Object parent_obj;
61
62 QemuMutex chr_write_lock;
63 CharBackend *be;
64 char *label;
65 char *filename;
66 int logfd;
67 int be_open;
68
69 bool handover_yank_instance;
70 GSource *gsource;
71 GMainContext *gcontext;
72 DECLARE_BITMAP(features, QEMU_CHAR_FEATURE_LAST);
73};
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85
86Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
87 GMainContext *context,
88 Error **errp);
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97void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
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106ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts,
107 Error **errp);
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120Chardev *qemu_chr_new(const char *label, const char *filename,
121 GMainContext *context);
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134Chardev *qemu_chr_new_mux_mon(const char *label, const char *filename,
135 GMainContext *context);
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143void qemu_chr_change(QemuOpts *opts, Error **errp);
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150void qemu_chr_cleanup(void);
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165Chardev *qemu_chr_new_noreplay(const char *label, const char *filename,
166 bool permit_mux_mon, GMainContext *context);
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178int qemu_chr_be_can_write(Chardev *s);
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189void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len);
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198void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len);
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206void qemu_chr_be_update_read_handlers(Chardev *s,
207 GMainContext *context);
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215void qemu_chr_be_event(Chardev *s, QEMUChrEvent event);
216
217int qemu_chr_add_client(Chardev *s, int fd);
218Chardev *qemu_chr_find(const char *name);
219
220bool qemu_chr_has_feature(Chardev *chr,
221 ChardevFeature feature);
222void qemu_chr_set_feature(Chardev *chr,
223 ChardevFeature feature);
224QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename,
225 bool permit_mux_mon);
226int qemu_chr_write(Chardev *s, const uint8_t *buf, int len, bool write_all);
227#define qemu_chr_write_all(s, buf, len) qemu_chr_write(s, buf, len, true)
228int qemu_chr_wait_connected(Chardev *chr, Error **errp);
229
230#define TYPE_CHARDEV "chardev"
231OBJECT_DECLARE_TYPE(Chardev, ChardevClass, CHARDEV)
232
233#define TYPE_CHARDEV_NULL "chardev-null"
234#define TYPE_CHARDEV_MUX "chardev-mux"
235#define TYPE_CHARDEV_RINGBUF "chardev-ringbuf"
236#define TYPE_CHARDEV_PTY "chardev-pty"
237#define TYPE_CHARDEV_CONSOLE "chardev-console"
238#define TYPE_CHARDEV_STDIO "chardev-stdio"
239#define TYPE_CHARDEV_PIPE "chardev-pipe"
240#define TYPE_CHARDEV_MEMORY "chardev-memory"
241#define TYPE_CHARDEV_PARALLEL "chardev-parallel"
242#define TYPE_CHARDEV_FILE "chardev-file"
243#define TYPE_CHARDEV_SERIAL "chardev-serial"
244#define TYPE_CHARDEV_SOCKET "chardev-socket"
245#define TYPE_CHARDEV_UDP "chardev-udp"
246
247#define CHARDEV_IS_RINGBUF(chr) \
248 object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF)
249#define CHARDEV_IS_PTY(chr) \
250 object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_PTY)
251
252struct ChardevClass {
253 ObjectClass parent_class;
254
255 bool internal;
256 bool supports_yank;
257 void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
258
259 void (*open)(Chardev *chr, ChardevBackend *backend,
260 bool *be_opened, Error **errp);
261
262 int (*chr_write)(Chardev *s, const uint8_t *buf, int len);
263 int (*chr_sync_read)(Chardev *s, const uint8_t *buf, int len);
264 GSource *(*chr_add_watch)(Chardev *s, GIOCondition cond);
265 void (*chr_update_read_handler)(Chardev *s);
266 int (*chr_ioctl)(Chardev *s, int cmd, void *arg);
267 int (*get_msgfds)(Chardev *s, int* fds, int num);
268 int (*set_msgfds)(Chardev *s, int *fds, int num);
269 int (*chr_add_client)(Chardev *chr, int fd);
270 int (*chr_wait_connected)(Chardev *chr, Error **errp);
271 void (*chr_disconnect)(Chardev *chr);
272 void (*chr_accept_input)(Chardev *chr);
273 void (*chr_set_echo)(Chardev *chr, bool echo);
274 void (*chr_set_fe_open)(Chardev *chr, int fe_open);
275 void (*chr_be_event)(Chardev *s, QEMUChrEvent event);
276 void (*chr_options_parsed)(Chardev *chr);
277};
278
279Chardev *qemu_chardev_new(const char *id, const char *typename,
280 ChardevBackend *backend, GMainContext *context,
281 Error **errp);
282
283extern int term_escape_char;
284
285GSource *qemu_chr_timeout_add_ms(Chardev *chr, guint ms,
286 GSourceFunc func, void *private);
287
288void suspend_mux_open(void);
289void resume_mux_open(void);
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292void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp);
293
294#endif
295