0bc69b6498
and move them in their proper places. Move the BRI registry from layer 2 (duh!) to layer 4, so active cards (which don't have layer 3 or layer 2 in their driver). Remove all remaining hard coded controller and driver types. Remove any arbitrary hard coded limits, at least those that show up in the internal API. This fixes PR 15950.
456 lines
13 KiB
C
456 lines
13 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_l4mgmt.c - layer 4 calldescriptor management utilites
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* -----------------------------------------------------------
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*
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* $Id: i4b_l4mgmt.c,v 1.6 2002/03/24 20:36:02 martin Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Fri Jan 5 11:33:47 2001]
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*
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*---------------------------------------------------------------------------*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: i4b_l4mgmt.c,v 1.6 2002/03/24 20:36:02 martin Exp $");
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#include "isdn.h"
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#if NISDN > 0
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
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#include <sys/callout.h>
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#endif
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#if defined(__FreeBSD__)
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#if defined (__FreeBSD_version) && __FreeBSD_version <= 400000
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#include <machine/random.h>
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#else
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#include <sys/random.h>
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#endif
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#endif
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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#else
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#include <netisdn/i4b_debug.h>
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#include <netisdn/i4b_ioctl.h>
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#endif
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#include <netisdn/i4b_l3l4.h>
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#include <netisdn/i4b_mbuf.h>
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#include <netisdn/i4b_isdnq931.h>
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#include <netisdn/i4b_global.h>
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#include <netisdn/i4b_l2.h>
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#include <netisdn/i4b_l1l2.h>
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#include <netisdn/i4b_l4.h>
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static unsigned int get_cdid(void);
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#if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
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void i4b_init_callout(call_desc_t *);
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#endif
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#define N_CALL_DESC 40 /* XXX - make this sizeable */
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call_desc_t call_desc[N_CALL_DESC]; /* call descriptor array */
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int num_call_desc = 0;
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/*---------------------------------------------------------------------------*
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* return a new unique call descriptor id
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* --------------------------------------
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* returns a new calldescriptor id which is used to uniquely identyfy
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* a single call in the communication between kernel and userland.
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* this cdid is then used to associate a calldescriptor with an id.
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*---------------------------------------------------------------------------*/
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static unsigned int
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get_cdid(void)
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{
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static unsigned int cdid_count = 0;
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int i;
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int x;
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x = splnet();
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/* get next id */
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cdid_count++;
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again:
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if(cdid_count == CDID_UNUSED) /* zero is invalid */
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cdid_count++;
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else if(cdid_count > CDID_MAX) /* wraparound ? */
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cdid_count = 1;
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/* check if id already in use */
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for(i=0; i < num_call_desc; i++)
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{
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if(call_desc[i].cdid == cdid_count)
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{
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cdid_count++;
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goto again;
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}
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}
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splx(x);
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return(cdid_count);
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}
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/*---------------------------------------------------------------------------*
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* reserve a calldescriptor for later usage
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* ----------------------------------------
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* searches the calldescriptor array until an unused
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* descriptor is found, gets a new calldescriptor id
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* and reserves it by putting the id into the cdid field.
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* returns pointer to the calldescriptor.
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*---------------------------------------------------------------------------*/
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call_desc_t *
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reserve_cd(void)
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{
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call_desc_t *cd;
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int x;
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int i;
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x = splnet();
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cd = NULL;
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for(i=0; i < num_call_desc; i++)
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{
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if(call_desc[i].cdid == CDID_UNUSED)
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{
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cd = &(call_desc[i]); /* get pointer to descriptor */
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NDBGL4(L4_MSG, "found free cd - index=%d cdid=%u",
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i, call_desc[i].cdid);
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break;
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}
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}
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if (cd == NULL && num_call_desc < N_CALL_DESC) {
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i = num_call_desc++;
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cd = &(call_desc[i]); /* get pointer to descriptor */
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NDBGL4(L4_MSG, "found free cd - index=%d cdid=%u",
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i, call_desc[i].cdid);
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}
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if (cd != NULL) {
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memset(cd, 0, sizeof(call_desc_t)); /* clear it */
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cd->cdid = get_cdid(); /* fill in new cdid */
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}
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splx(x);
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if(cd == NULL)
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panic("reserve_cd: no free call descriptor available!");
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#if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
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i4b_init_callout(cd);
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#endif
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return(cd);
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}
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/*---------------------------------------------------------------------------*
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* free a calldescriptor
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* ---------------------
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* free a unused calldescriptor by giving address of calldescriptor
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* and writing a 0 into the cdid field marking it as unused.
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*---------------------------------------------------------------------------*/
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void
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freecd_by_cd(call_desc_t *cd)
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{
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int i;
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int x = splnet();
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for(i=0; i < num_call_desc; i++)
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{
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if( (call_desc[i].cdid != CDID_UNUSED) &&
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(&(call_desc[i]) == cd) )
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{
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NDBGL4(L4_MSG, "releasing cd - index=%d cdid=%u cr=%d",
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i, call_desc[i].cdid, cd->cr);
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call_desc[i].cdid = CDID_UNUSED;
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break;
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}
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}
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if(i == N_CALL_DESC)
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panic("freecd_by_cd: ERROR, cd not found, cr = %d\n", cd->cr);
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splx(x);
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}
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/*---------------------------------------------------------------------------*
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* return pointer to calldescriptor by giving the calldescriptor id
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* ----------------------------------------------------------------
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* lookup a calldescriptor in the calldescriptor array by looking
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* at the cdid field. return pointer to calldescriptor if found,
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* else return NULL if not found.
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*---------------------------------------------------------------------------*/
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call_desc_t *
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cd_by_cdid(unsigned int cdid)
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{
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int i;
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for(i=0; i < num_call_desc; i++)
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{
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if(call_desc[i].cdid == cdid)
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{
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NDBGL4(L4_MSG, "found cdid - index=%d cdid=%u cr=%d",
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i, call_desc[i].cdid, call_desc[i].cr);
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#if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
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i4b_init_callout(&call_desc[i]);
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#endif
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return(&(call_desc[i]));
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}
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}
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return(NULL);
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}
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/*---------------------------------------------------------------------------*
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* search calldescriptor
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* ---------------------
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* This routine searches for the calldescriptor for a passive controller
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* given by unit number, callreference and callreference flag.
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* It returns a pointer to the calldescriptor if found, else a NULL.
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*---------------------------------------------------------------------------*/
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call_desc_t *
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cd_by_bricr(int bri, int cr, int crf)
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{
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int i;
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for(i=0; i < num_call_desc; i++)
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{
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if (call_desc[i].cdid != CDID_UNUSED && call_desc[i].bri == bri &&
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call_desc[i].cr == cr && call_desc[i].crflag == crf)
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{
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NDBGL4(L4_MSG, "found cd, index=%d cdid=%u cr=%d",
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i, call_desc[i].cdid, call_desc[i].cr);
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#if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
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i4b_init_callout(&call_desc[i]);
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#endif
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return(&(call_desc[i]));
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}
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}
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return(NULL);
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}
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/*---------------------------------------------------------------------------*
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* generate 7 bit "random" number used for outgoing Call Reference
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*---------------------------------------------------------------------------*/
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unsigned char
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get_rand_cr(int unit)
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{
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register int i, j;
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static u_char val, retval;
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static int called = 42;
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val += ++called;
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for(i=0; i < 50 ; i++, val++)
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{
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int found = 1;
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#if defined(__FreeBSD__)
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#ifdef RANDOMDEV
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read_random((char *)&val, sizeof(val));
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#else
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val = (u_char)random();
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#endif /* RANDOMDEV */
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#else
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val |= unit+i;
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val <<= i;
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val ^= (time.tv_sec >> 8) ^ time.tv_usec;
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val <<= i;
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val ^= time.tv_sec ^ (time.tv_usec >> 8);
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#endif
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retval = val & 0x7f;
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if(retval == 0 || retval == 0x7f)
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continue;
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for(j=0; j < num_call_desc; j++)
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{
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if( (call_desc[j].cdid != CDID_UNUSED) &&
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(call_desc[j].cr == retval) )
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{
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found = 0;
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break;
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}
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}
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if(found)
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return(retval);
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}
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return(0); /* XXX */
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}
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/*---------------------------------------------------------------------------*
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* initialize the callout handles for FreeBSD
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*---------------------------------------------------------------------------*/
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#if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
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void
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i4b_init_callout(call_desc_t *cd)
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{
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if(cd->callouts_inited == 0)
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{
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#ifdef __FreeBSD__
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callout_handle_init(&cd->idle_timeout_handle);
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callout_handle_init(&cd->T303_callout);
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callout_handle_init(&cd->T305_callout);
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callout_handle_init(&cd->T308_callout);
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callout_handle_init(&cd->T309_callout);
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callout_handle_init(&cd->T310_callout);
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callout_handle_init(&cd->T313_callout);
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callout_handle_init(&cd->T400_callout);
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#else
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callout_init(&cd->idle_timeout_handle);
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callout_init(&cd->T303_callout);
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callout_init(&cd->T305_callout);
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callout_init(&cd->T308_callout);
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callout_init(&cd->T309_callout);
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callout_init(&cd->T310_callout);
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callout_init(&cd->T313_callout);
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callout_init(&cd->T400_callout);
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#endif
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cd->callouts_inited = 1;
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}
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}
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#endif
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#ifdef I4B_CD_DEBUG_PRINT
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extern char *print_l3state(call_desc_t *cd);
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void i4b_print_cdp(call_desc_t *cdp);
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void i4b_print_cdx(int index);
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void i4b_print_cda(void);
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void i4b_print_cdaa(void);
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/*---------------------------------------------------------------------------*
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* print a call descriptor by cd-pointer
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*---------------------------------------------------------------------------*/
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void
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i4b_print_cdp(call_desc_t *cdp)
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{
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if((cdp > &(call_desc[num_call_desc])) || (cdp < &(call_desc[0])))
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{
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printf("i4b_print_cd: cdp out of range!\n");
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return;
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}
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printf("i4b_print_cd: printing call descriptor %d at 0x%lx:\n", cdp - (&(call_desc[0])), (unsigned long)cdp);
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printf(" cdid = %d\n", cdp->cdid);
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printf(" controller = %d (u=%d, dl=%d, b1=%d, b2=%d)\n",
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cdp->controller,
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ctrl_desc[cdp->controller].unit,
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ctrl_desc[cdp->controller].dl_est,
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ctrl_desc[cdp->controller].bch_state[CHAN_B1],
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ctrl_desc[cdp->controller].bch_state[CHAN_B2]);
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printf(" cr = 0x%02x\n", cdp->cr);
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printf(" crflag = %d\n", cdp->crflag);
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printf(" channelid = %d\n", cdp->channelid);
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printf(" bprot = %d\n", cdp->bprot);
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printf(" driver = %d\n", cdp->driver);
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printf(" driver_unit = %d\n", cdp->driver_unit);
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printf(" call_state = %d\n", cdp->call_state);
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printf(" Q931state = %s\n", print_l3state(cdp));
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printf(" event = %d\n", cdp->event);
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printf(" response = %d\n", cdp->response);
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printf(" T303 = %d\n", cdp->T303);
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printf("T303_first_to = %d\n", cdp->T303_first_to);
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printf(" T305 = %d\n", cdp->T305);
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printf(" T308 = %d\n", cdp->T308);
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printf("T308_first_to = %d\n", cdp->T308_first_to);
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printf(" T309 = %d\n", cdp->T309);
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printf(" T310 = %d\n", cdp->T310);
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printf(" T313 = %d\n", cdp->T313);
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printf(" T400 = %d\n", cdp->T400);
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printf(" dir = %s\n", cdp->dir == DIR_OUTGOING ? "out" : "in");
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}
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/*---------------------------------------------------------------------------*
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* print a call descriptor by index
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*---------------------------------------------------------------------------*/
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void
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i4b_print_cdx(int index)
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{
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if(index >= num_call_desc)
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{
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printf("i4b_print_cdx: index %d >= N_CALL_DESC %d\n", index, N_CALL_DESC);
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return;
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}
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i4b_print_cdp(&(call_desc[index]));
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}
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/*---------------------------------------------------------------------------*
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* print all call descriptors
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*---------------------------------------------------------------------------*/
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void
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i4b_print_cda(void)
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{
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int i;
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for(i=0; i < num_call_desc; i++)
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{
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i4b_print_cdp(&(call_desc[i]));
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}
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}
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/*---------------------------------------------------------------------------*
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* print all active call descriptors
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*---------------------------------------------------------------------------*/
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void
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i4b_print_cdaa(void)
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{
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int i;
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for(i=0; i < num_call_desc; i++)
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{
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if(call_desc[i].cdid != CDID_UNUSED)
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{
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i4b_print_cdp(&(call_desc[i]));
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}
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}
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}
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#endif /* I4B_CD_DEBUG_PRINT */
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#endif /* NISDN > 0 */
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