5171d409a5
This now provides slightly more functionality than the FreeBSD layer1-newbus interface. It was meant to be a simple change to one header and a few c files, but the change rippled all through various stuff. To prevent a change to the kernel<->userland interface right now the kernel is now lying about card types to userland (but who cares). This will be fixed when the userland interface changes, after layer 3 <-> layer 4 has been fixed. Functional changes: Provide a clean interface for hardware drivers to attach to the upper layers. This will need another small change in the B-channel handling when a similar change to the layer 3 <-> layer 4 interface happens. Avoid passing indices into global arrays of pointers around, instead pass the pointers itself. Don't code hardware driver types by predefined magic numbers (think LKM). Prepare for detachable drivers (think pcmcia). While there remove some sets of function pointers always pointing to the same function (meant to be the configurable set of D channel protocol handlers). It is unlikely another supported D-channel protocol will fit into that (maximal layer interface) abstraction. When we get support for another protocol, we will need to come up with a workable interface. Besides, the old implementation was, uhm, strange.
76 lines
3.4 KiB
C
76 lines
3.4 KiB
C
/*
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* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_l3.h - layer 3 header file
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* ------------------------------
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*
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* $Id: i4b_l3.h,v 1.2 2001/03/24 12:40:32 martin Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Thu Apr 27 11:07:01 2000]
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*
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*---------------------------------------------------------------------------*/
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#ifndef _I4B_L3_H_
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#define _I4B_L3_H_
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extern int utoc_tab[];
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extern unsigned char cause_tab_q931[];
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extern int i4b_aoc ( unsigned char *, call_desc_t *cd );
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extern void i4b_decode_q931 ( int unit, int msg_len, u_char *msg_ptr );
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extern int i4b_decode_q931_cs0_ie ( int unit, call_desc_t *cd, int msg_len, u_char *msg_ptr );
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extern void i4b_decode_q931_message ( int unit, call_desc_t *cd, u_char message_type );
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extern void i4b_l3_stop_all_timers ( call_desc_t *cd );
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extern void i4b_l3_tx_alert ( call_desc_t *cd );
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extern void i4b_l3_tx_connect ( call_desc_t *cd );
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extern void i4b_l3_tx_connect_ack ( call_desc_t *cd );
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extern void i4b_l3_tx_disconnect ( call_desc_t *cd );
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extern void i4b_l3_tx_release ( call_desc_t *cd, int send_cause_flag );
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extern void i4b_l3_tx_release_complete ( call_desc_t *cd, int send_cause_flag );
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extern void i4b_l3_tx_setup ( call_desc_t *cd );
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extern void i4b_l3_tx_status ( call_desc_t *cd, u_char q850cause );
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extern int i4b_get_dl_stat( call_desc_t *cd );
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extern void i4b_print_frame ( int len, u_char *buf );
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extern void next_l3state ( call_desc_t *cd, int event );
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extern char *print_l3state ( call_desc_t *cd );
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extern unsigned char setup_cr ( call_desc_t *cd, unsigned char cr );
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extern void T303_start ( call_desc_t *cd );
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extern void T303_stop ( call_desc_t *cd );
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extern void T305_start ( call_desc_t *cd );
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extern void T305_stop ( call_desc_t *cd );
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extern void T308_start ( call_desc_t *cd );
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extern void T308_stop ( call_desc_t *cd );
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extern void T309_start ( call_desc_t *cd );
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extern void T309_stop ( call_desc_t *cd );
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extern void T310_start ( call_desc_t *cd );
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extern void T310_stop ( call_desc_t *cd );
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extern void T313_start ( call_desc_t *cd );
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extern void T313_stop ( call_desc_t *cd );
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#endif /* _I4B_L3_H_ */
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