37aff7daa7
Thread was not really needed there, while previous ng_tty implementation that used thread pointer had locking issues (using sx while holding mutex).
148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_TTYHOOK_H_
|
|
#define _SYS_TTYHOOK_H_
|
|
|
|
#ifndef _SYS_TTY_H_
|
|
#error "can only be included through <sys/tty.h>"
|
|
#endif /* !_SYS_TTY_H_ */
|
|
|
|
struct tty;
|
|
|
|
/*
|
|
* Hooks interface, which allows to capture and inject traffic into the
|
|
* input and output paths of a TTY.
|
|
*/
|
|
|
|
typedef int th_rint_t(struct tty *tp, char c, int flags);
|
|
typedef size_t th_rint_bypass_t(struct tty *tp, const void *buf, size_t len);
|
|
typedef void th_rint_done_t(struct tty *tp);
|
|
typedef size_t th_rint_poll_t(struct tty *tp);
|
|
|
|
typedef size_t th_getc_inject_t(struct tty *tp, void *buf, size_t len);
|
|
typedef void th_getc_capture_t(struct tty *tp, const void *buf, size_t len);
|
|
typedef size_t th_getc_poll_t(struct tty *tp);
|
|
|
|
typedef void th_close_t(struct tty *tp);
|
|
|
|
struct ttyhook {
|
|
/* Character input. */
|
|
th_rint_t *th_rint;
|
|
th_rint_bypass_t *th_rint_bypass;
|
|
th_rint_done_t *th_rint_done;
|
|
th_rint_poll_t *th_rint_poll;
|
|
|
|
/* Character output. */
|
|
th_getc_inject_t *th_getc_inject;
|
|
th_getc_capture_t *th_getc_capture;
|
|
th_getc_poll_t *th_getc_poll;
|
|
|
|
th_close_t *th_close;
|
|
};
|
|
|
|
int ttyhook_register(struct tty **, struct proc *, int,
|
|
struct ttyhook *, void *);
|
|
void ttyhook_unregister(struct tty *);
|
|
#define ttyhook_softc(tp) ((tp)->t_hooksoftc)
|
|
#define ttyhook_hashook(tp,hook) ((tp)->t_hook != NULL && \
|
|
(tp)->t_hook->th_ ## hook != NULL)
|
|
|
|
static __inline int
|
|
ttyhook_rint(struct tty *tp, char c, int flags)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
return tp->t_hook->th_rint(tp, c, flags);
|
|
}
|
|
|
|
static __inline size_t
|
|
ttyhook_rint_bypass(struct tty *tp, const void *buf, size_t len)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
return tp->t_hook->th_rint_bypass(tp, buf, len);
|
|
}
|
|
|
|
static __inline void
|
|
ttyhook_rint_done(struct tty *tp)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
tp->t_hook->th_rint_done(tp);
|
|
}
|
|
|
|
static __inline size_t
|
|
ttyhook_rint_poll(struct tty *tp)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
return tp->t_hook->th_rint_poll(tp);
|
|
}
|
|
|
|
static __inline size_t
|
|
ttyhook_getc_inject(struct tty *tp, void *buf, size_t len)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
return tp->t_hook->th_getc_inject(tp, buf, len);
|
|
}
|
|
|
|
static __inline void
|
|
ttyhook_getc_capture(struct tty *tp, const void *buf, size_t len)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
tp->t_hook->th_getc_capture(tp, buf, len);
|
|
}
|
|
|
|
static __inline size_t
|
|
ttyhook_getc_poll(struct tty *tp)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
MPASS(!tty_gone(tp));
|
|
|
|
return tp->t_hook->th_getc_poll(tp);
|
|
}
|
|
|
|
static __inline void
|
|
ttyhook_close(struct tty *tp)
|
|
{
|
|
tty_lock_assert(tp, MA_OWNED);
|
|
|
|
tp->t_hook->th_close(tp);
|
|
}
|
|
|
|
#endif /* !_SYS_TTYHOOK_H_ */
|