/usr/include/spandsp/private/v42.h is in libspandsp-dev 0.0.6~pre20-3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /*
* SpanDSP - a series of DSP components for telephony
*
* private/v42.h
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2003 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if !defined(_SPANDSP_PRIVATE_V42_H_)
#define _SPANDSP_PRIVATE_V42_H_
/*!
LAP-M descriptor. This defines the working state for a single instance of LAP-M.
*/
struct lapm_state_s
{
int handle;
hdlc_rx_state_t hdlc_rx;
hdlc_tx_state_t hdlc_tx;
v42_frame_handler_t iframe_receive;
void *iframe_receive_user_data;
v42_status_func_t status_callback;
void *status_callback_user_data;
int state;
int tx_waiting;
int debug;
/*! TRUE if originator. FALSE if answerer */
int we_are_originator;
/*! Remote network type (unknown, answerer. originator) */
int peer_is_originator;
/*! Next N(S) for transmission */
int next_tx_frame;
/*! The last of our frames which the peer acknowledged */
int last_frame_peer_acknowledged;
/*! Next N(R) for reception */
int next_expected_frame;
/*! The last of the peer's frames which we acknowledged */
int last_frame_we_acknowledged;
/*! TRUE if we sent an I or S frame with the F-bit set */
int solicit_f_bit;
/*! Retransmission count */
int retransmissions;
/*! TRUE if peer is busy */
int busy;
/*! Acknowledgement timer */
int t401_timer;
/*! Reply delay timer - optional */
int t402_timer;
/*! Inactivity timer - optional */
int t403_timer;
/*! Maximum number of octets in an information field */
int n401;
/*! Window size */
int window_size_k;
lapm_frame_queue_t *txqueue;
lapm_frame_queue_t *tx_next;
lapm_frame_queue_t *tx_last;
queue_state_t *tx_queue;
span_sched_state_t sched;
/*! \brief Error and flow logging control */
logging_state_t logging;
};
/*!
V.42 descriptor. This defines the working state for a single instance of V.42.
*/
struct v42_state_s
{
/*! TRUE if we are the calling party, otherwise FALSE */
int calling_party;
/*! TRUE if we should detect whether the far end is V.42 capable. FALSE if we go
directly to protocol establishment */
int detect;
/*! Stage in negotiating V.42 support */
int rx_negotiation_step;
int rxbits;
int rxstream;
int rxoks;
int odp_seen;
int txbits;
int txstream;
int txadps;
/*! The LAP.M context */
lapm_state_t lapm;
/*! V.42 support detection timer */
int t400_timer;
/*! \brief Error and flow logging control */
logging_state_t logging;
};
#endif
/*- End of file ------------------------------------------------------------*/
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