blob: 9be57716b2caa149645513cea51638f8861a90e7 [file] [log] [blame]
#ifndef QEMU_CHAR_H
#define QEMU_CHAR_H
#include "qemu-common.h"
#include "qemu/queue.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "block/aio.h"
#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qstring.h"
#include "qemu/main-loop.h"
/* character device */
#define CHR_EVENT_BREAK 0 /* serial break char */
#define CHR_EVENT_FOCUS 1 /* focus to this terminal (modal input needed) */
#define CHR_EVENT_OPENED 2 /* new connection established */
#define CHR_EVENT_MUX_IN 3 /* mux-focus was set to this terminal */
#define CHR_EVENT_MUX_OUT 4 /* mux-focus will move on */
#define CHR_EVENT_CLOSED 5 /* connection closed */
#define CHR_IOCTL_SERIAL_SET_PARAMS 1
typedef struct {
int speed;
int parity;
int data_bits;
int stop_bits;
} QEMUSerialSetParams;
#define CHR_IOCTL_SERIAL_SET_BREAK 2
#define CHR_IOCTL_PP_READ_DATA 3
#define CHR_IOCTL_PP_WRITE_DATA 4
#define CHR_IOCTL_PP_READ_CONTROL 5
#define CHR_IOCTL_PP_WRITE_CONTROL 6
#define CHR_IOCTL_PP_READ_STATUS 7
#define CHR_IOCTL_PP_EPP_READ_ADDR 8
#define CHR_IOCTL_PP_EPP_READ 9
#define CHR_IOCTL_PP_EPP_WRITE_ADDR 10
#define CHR_IOCTL_PP_EPP_WRITE 11
#define CHR_IOCTL_PP_DATA_DIR 12
#define CHR_IOCTL_SERIAL_SET_TIOCM 13
#define CHR_IOCTL_SERIAL_GET_TIOCM 14
#define CHR_TIOCM_CTS 0x020
#define CHR_TIOCM_CAR 0x040
#define CHR_TIOCM_DSR 0x100
#define CHR_TIOCM_RI 0x080
#define CHR_TIOCM_DTR 0x002
#define CHR_TIOCM_RTS 0x004
typedef void IOEventHandler(void *opaque, int event);
struct CharDriverState {
void (*init)(struct CharDriverState *s);
int (*chr_write)(struct CharDriverState *s, const uint8_t *buf, int len);
GSource *(*chr_add_watch)(struct CharDriverState *s, GIOCondition cond);
void (*chr_update_read_handler)(struct CharDriverState *s);
int (*chr_ioctl)(struct CharDriverState *s, int cmd, void *arg);
int (*get_msgfd)(struct CharDriverState *s);
int (*chr_add_client)(struct CharDriverState *chr, int fd);
int (*chr_del_client)(struct CharDriverState *chr);
IOEventHandler *chr_event;
IOCanReadHandler *chr_can_read;
IOReadHandler *chr_read;
void *handler_opaque;
void (*chr_close)(struct CharDriverState *chr);
void (*chr_accept_input)(struct CharDriverState *chr);
void (*chr_set_echo)(struct CharDriverState *chr, bool echo);
void (*chr_set_fe_open)(struct CharDriverState *chr, int fe_open);
void (*chr_fe_event)(struct CharDriverState *chr, int event);
void *opaque;
char *label;
char *filename;
int be_open;
int fe_open;
int explicit_fe_open;
int explicit_be_open;
int avail_connections;
int is_mux;
guint fd_in_tag;
QemuOpts *opts;
QTAILQ_ENTRY(CharDriverState) next;
};
/**
* @qemu_chr_new_from_opts:
*
* Create a new character backend from a QemuOpts list.
*
* @opts see qemu-config.c for a list of valid options
* @init not sure..
*
* Returns: a new character backend
*/
CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s),
Error **errp);
/**
* @qemu_chr_new:
*
* Create a new character backend from a URI.
*
* @label the name of the backend
* @filename the URI
* @init not sure..
*
* Returns: a new character backend
*/
CharDriverState *qemu_chr_new(const char *label, const char *filename,
void (*init)(struct CharDriverState *s));
/**
* @qemu_chr_delete:
*
* Destroy a character backend.
*/
void qemu_chr_delete(CharDriverState *chr);
/**
* @qemu_chr_fe_set_echo:
*
* Ask the backend to override its normal echo setting. This only really
* applies to the stdio backend and is used by the QMP server such that you
* can see what you type if you try to type QMP commands.
*
* @echo true to enable echo, false to disable echo
*/
void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo);
/**
* @qemu_chr_fe_set_open:
*
* Set character frontend open status. This is an indication that the
* front end is ready (or not) to begin doing I/O.
*/
void qemu_chr_fe_set_open(struct CharDriverState *chr, int fe_open);
/**
* @qemu_chr_fe_event:
*
* Send an event from the front end to the back end.
*
* @event the event to send
*/
void qemu_chr_fe_event(CharDriverState *s, int event);
/**
* @qemu_chr_fe_printf:
*
* Write to a character backend using a printf style interface.
*
* @fmt see #printf
*/
void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data);
/**
* @qemu_chr_fe_write:
*
* Write data to a character backend from the front end. This function will
* send data from the front end to the back end.
*
* @buf the data
* @len the number of bytes to send
*
* Returns: the number of bytes consumed
*/
int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len);
/**
* @qemu_chr_fe_write_all:
*
* Write data to a character backend from the front end. This function will
* send data from the front end to the back end. Unlike @qemu_chr_fe_write,
* this function will block if the back end cannot consume all of the data
* attempted to be written.
*
* @buf the data
* @len the number of bytes to send
*
* Returns: the number of bytes consumed
*/
int qemu_chr_fe_write_all(CharDriverState *s, const uint8_t *buf, int len);
/**
* @qemu_chr_fe_ioctl:
*
* Issue a device specific ioctl to a backend.
*
* @cmd see CHR_IOCTL_*
* @arg the data associated with @cmd
*
* Returns: if @cmd is not supported by the backend, -ENOTSUP, otherwise the
* return value depends on the semantics of @cmd
*/
int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg);
/**
* @qemu_chr_fe_get_msgfd:
*
* For backends capable of fd passing, return the latest file descriptor passed
* by a client.
*
* Returns: -1 if fd passing isn't supported or there is no pending file
* descriptor. If a file descriptor is returned, subsequent calls to
* this function will return -1 until a client sends a new file
* descriptor.
*/
int qemu_chr_fe_get_msgfd(CharDriverState *s);
/**
* @qemu_chr_fe_claim:
*
* Claim a backend before using it, should be called before calling
* qemu_chr_add_handlers().
*
* Returns: -1 if the backend is already in use by another frontend, 0 on
* success.
*/
int qemu_chr_fe_claim(CharDriverState *s);
/**
* @qemu_chr_fe_claim_no_fail:
*
* Like qemu_chr_fe_claim, but will exit qemu with an error when the
* backend is already in use.
*/
void qemu_chr_fe_claim_no_fail(CharDriverState *s);
/**
* @qemu_chr_fe_claim:
*
* Release a backend for use by another frontend.
*
* Returns: -1 if the backend is already in use by another frontend, 0 on
* success.
*/
void qemu_chr_fe_release(CharDriverState *s);
/**
* @qemu_chr_be_can_write:
*
* Determine how much data the front end can currently accept. This function
* returns the number of bytes the front end can accept. If it returns 0, the
* front end cannot receive data at the moment. The function must be polled
* to determine when data can be received.
*
* Returns: the number of bytes the front end can receive via @qemu_chr_be_write
*/
int qemu_chr_be_can_write(CharDriverState *s);
/**
* @qemu_chr_be_write:
*
* Write data from the back end to the front end. Before issuing this call,
* the caller should call @qemu_chr_be_can_write to determine how much data
* the front end can currently accept.
*
* @buf a buffer to receive data from the front end
* @len the number of bytes to receive from the front end
*/
void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len);
/**
* @qemu_chr_be_event:
*
* Send an event from the back end to the front end.
*
* @event the event to send
*/
void qemu_chr_be_event(CharDriverState *s, int event);
void qemu_chr_add_handlers(CharDriverState *s,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,
IOEventHandler *fd_event,
void *opaque);
void qemu_chr_be_generic_open(CharDriverState *s);
void qemu_chr_accept_input(CharDriverState *s);
int qemu_chr_add_client(CharDriverState *s, int fd);
/**
* @qemu_chr_del_client:
*
* Delete (disconnect) the current client from the char backend,
* as if the remote end had closed itself. This is most useful for TCP
* listening sockets, where it means that we will close the connection to
* the current client but remain listening for new ones.
*/
int qemu_chr_del_client(CharDriverState *s);
void qemu_chr_info_print(Monitor *mon, const QObject *ret_data);
void qemu_chr_info(Monitor *mon, QObject **ret_data);
CharDriverState *qemu_chr_find(const char *name);
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
void register_char_driver(const char *name, CharDriverState *(*open)(QemuOpts *));
void register_char_driver_qapi(const char *name, ChardevBackendKind kind,
void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp));
/* add an eventfd to the qemu devices that are polled */
CharDriverState *qemu_chr_open_eventfd(int eventfd);
extern int term_escape_char;
CharDriverState *qemu_char_get_next_serial(void);
/* msmouse */
CharDriverState *qemu_chr_open_msmouse(void);
/* baum.c */
CharDriverState *chr_baum_init(void);
#endif