1 files changed, 254 insertions, 0 deletions
diff --git a/include/char/char.h b/include/char/char.h
new file mode 100644
index 0000000000..baa5d035fd
--- /dev/null
+++ b/include/char/char.h
@@ -0,0 +1,254 @@
+#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);
+    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);
+    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_guest_open)(struct CharDriverState *chr);
+    void (*chr_guest_close)(struct CharDriverState *chr);
+    void *opaque;
+    QEMUTimer *open_timer;
+    char *label;
+    char *filename;
+    int opened;
+    int avail_connections;
+    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));
+
+/**
+ * @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_open:
+ *
+ * Open a character backend.  This function call is an indication that the
+ * front end is ready to begin doing I/O.
+ */
+void qemu_chr_fe_open(struct CharDriverState *chr);
+
+/**
+ * @qemu_chr_fe_close:
+ *
+ * Close a character backend.  This function call indicates that the front end
+ * no longer is able to process I/O.  To process I/O again, the front end will
+ * call @qemu_chr_fe_open.
+ */
+void qemu_chr_fe_close(struct CharDriverState *chr);
+
+/**
+ * @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);
+
+/**
+ * @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_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_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_generic_open(CharDriverState *s);
+void qemu_chr_accept_input(CharDriverState *s);
+int qemu_chr_add_client(CharDriverState *s, int fd);
+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);
+
+/* add an eventfd to the qemu devices that are polled */
+CharDriverState *qemu_chr_open_eventfd(int eventfd);
+
+extern int term_escape_char;
+
+/* memory chardev */
+void qemu_chr_init_mem(CharDriverState *chr);
+void qemu_chr_close_mem(CharDriverState *chr);
+QString *qemu_chr_mem_to_qs(CharDriverState *chr);
+size_t qemu_chr_mem_osize(const CharDriverState *chr);
+
+CharDriverState *qemu_char_get_next_serial(void);
+
+#endif