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/* $OpenBSD: sock.h,v 1.5 2018/06/26 07:13:54 ratchov Exp $ */
/*
* Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef SOCK_H
#define SOCK_H
#include "amsg.h"
struct file;
struct slot;
struct midi;
struct sock {
struct sock *next;
int fd;
struct file *file;
struct amsg rmsg, wmsg; /* messages being sent/received */
unsigned int wmax; /* max bytes we're allowed to write */
unsigned int rmax; /* max bytes we're allowed to read */
unsigned int rsize; /* input bytes to read (DATA msg) */
unsigned int wsize; /* output bytes to write (DATA msg) */
unsigned int rtodo; /* input bytes not read yet */
unsigned int wtodo; /* output bytes not written yet */
#define SOCK_RIDLE 0 /* not expecting messages */
#define SOCK_RMSG 1 /* expecting a message */
#define SOCK_RDATA 2 /* data chunk being read */
#define SOCK_RRET 3 /* reply being returned */
unsigned int rstate; /* state of the read-end FSM */
#define SOCK_WIDLE 0 /* nothing to do */
#define SOCK_WMSG 1 /* amsg being written */
#define SOCK_WDATA 2 /* data chunk being written */
unsigned int wstate; /* state of the write-end FSM */
#define SOCK_AUTH 0 /* waiting for AUTH message */
#define SOCK_HELLO 1 /* waiting for HELLO message */
#define SOCK_INIT 2 /* parameter negotiation */
#define SOCK_START 3 /* filling play buffers */
#define SOCK_STOP 4 /* draining rec buffers */
unsigned int pstate; /* one of the above */
int tickpending; /* tick waiting to be transmitted */
int fillpending; /* flowctl waiting to be transmitted */
int stoppending; /* last STOP ack to be sent */
unsigned int walign; /* align written data to this */
unsigned int ralign; /* read data is aligned to this */
int lastvol; /* last volume */
struct slot *slot; /* audio device slot number */
struct midi *midi; /* midi endpoint */
struct port *port; /* midi port */
};
struct sock *sock_new(int fd);
void sock_close(struct sock *);
extern struct sock *sock_list;
#endif /* !defined(SOCK_H) */
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