1 /* $OpenBSD: sock.h,v 1.4 2015/11/25 18:46:21 ratchov Exp $ */ 2 /* 3 * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 #ifndef SOCK_H 18 #define SOCK_H 19 20 #include "amsg.h" 21 22 struct opt; 23 struct file; 24 struct slot; 25 struct midi; 26 27 struct sock { 28 struct sock *next; 29 int fd; 30 struct file *file; 31 struct amsg rmsg, wmsg; /* messages being sent/received */ 32 unsigned int wmax; /* max bytes we're allowed to write */ 33 unsigned int rmax; /* max bytes we're allowed to read */ 34 unsigned int rsize; /* input bytes to read (DATA msg) */ 35 unsigned int wsize; /* output bytes to write (DATA msg) */ 36 unsigned int rtodo; /* input bytes not read yet */ 37 unsigned int wtodo; /* output bytes not written yet */ 38 #define SOCK_RIDLE 0 /* not expecting messages */ 39 #define SOCK_RMSG 1 /* expecting a message */ 40 #define SOCK_RDATA 2 /* data chunk being read */ 41 #define SOCK_RRET 3 /* reply being returned */ 42 unsigned int rstate; /* state of the read-end FSM */ 43 #define SOCK_WIDLE 0 /* nothing to do */ 44 #define SOCK_WMSG 1 /* amsg being written */ 45 #define SOCK_WDATA 2 /* data chunk being written */ 46 unsigned int wstate; /* state of the write-end FSM */ 47 #define SOCK_AUTH 0 /* waiting for AUTH message */ 48 #define SOCK_HELLO 1 /* waiting for HELLO message */ 49 #define SOCK_INIT 2 /* parameter negotiation */ 50 #define SOCK_START 3 /* filling play buffers */ 51 #define SOCK_STOP 4 /* draining rec buffers */ 52 unsigned int pstate; /* one of the above */ 53 int tickpending; /* tick waiting to be transmitted */ 54 int fillpending; /* flowctl waiting to be transmitted */ 55 int stoppending; /* last STOP ack to be sent */ 56 unsigned int walign; /* align written data to this */ 57 unsigned int ralign; /* read data is aligned to this */ 58 int lastvol; /* last volume */ 59 struct opt *opt; /* "subdevice" definition */ 60 struct slot *slot; /* audio device slot number */ 61 struct midi *midi; /* midi endpoint */ 62 struct port *port; /* midi port */ 63 }; 64 65 struct sock *sock_new(int fd); 66 void sock_close(struct sock *); 67 extern struct sock *sock_list; 68 69 #endif /* !defined(SOCK_H) */ 70