Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
032762e1e9
NetBSD/sys/netisdn/i4b_tei.c
martin 0bc69b6498 Now that we have all the pieces of the puzzle available start to unriddle 
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.
2002-03-24 20:35:43 +00:00

336 lines
9.2 KiB
C
Raw Blame History

/*
* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------
*
* i4b_tei.c - tei handling procedures
* -----------------------------------
*
* $Id: i4b_tei.c,v 1.4 2002/03/24 20:36:03 martin Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:47 2001]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_tei.c,v 1.4 2002/03/24 20:36:03 martin Exp $");
#ifdef __FreeBSD__
#include "i4bq921.h"
#else
#define NI4BQ921 1
#endif
#if NI4BQ921 > 0
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
#include <sys/callout.h>
#endif
#if defined(__FreeBSD__)
#if defined (__FreeBSD_version) && __FreeBSD_version <= 400000
#include <machine/random.h>
#else
#include <sys/random.h>
#endif
#endif
#ifdef __FreeBSD__
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#else
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_ioctl.h>
#endif
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_l2.h>
#include <netisdn/i4b_l1l2.h>
#include <netisdn/i4b_isdnq931.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_l2.h>
#include <netisdn/i4b_l2fsm.h>
/*---------------------------------------------------------------------------*
* handle a received TEI management frame
*---------------------------------------------------------------------------*/
void
i4b_tei_rxframe(l2_softc_t *l2sc, struct mbuf *m)
{
u_char *ptr = m->m_data;
switch(*(ptr + OFF_MT))
{
case MT_ID_ASSIGN:
if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
(*(ptr + OFF_RIH) == l2sc->last_rih))
{
l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
l2sc->tei_valid = TEI_VALID;
if(l2sc->T202 == TIMER_ACTIVE)
i4b_T202_stop(l2sc);
i4b_mdl_status_ind(l2sc->bri, STI_TEIASG, l2sc->tei);
log(LOG_INFO, "i4b: bri %d, assigned TEI = %d = 0x%02x\n", l2sc->bri, l2sc->tei, l2sc->tei);
NDBGL2(L2_TEI_MSG, "TEI ID Assign - TEI = %d", l2sc->tei);
i4b_next_l2state(l2sc, EV_MDASGRQ);
}
break;
case MT_ID_DENY:
if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
(*(ptr + OFF_RIH) == l2sc->last_rih))
{
l2sc->tei_valid = TEI_INVALID;
l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
if(l2sc->tei == GROUP_TEI)
{
log(LOG_WARNING, "i4b: bri %d, denied TEI, no TEI values available from exchange!\n", l2sc->bri);
NDBGL2(L2_TEI_ERR, "TEI ID Denied, No TEI values available from exchange!");
}
else
{
log(LOG_WARNING, "i4b: bri %d, denied TEI = %d = 0x%02x\n", l2sc->bri, l2sc->tei, l2sc->tei);
NDBGL2(L2_TEI_ERR, "TEI ID Denied - TEI = %d", l2sc->tei);
}
i4b_mdl_status_ind(l2sc->bri, STI_TEIASG, -1);
i4b_next_l2state(l2sc, EV_MDERRRS);
}
break;
case MT_ID_CHK_REQ:
if( (l2sc->tei_valid == TEI_VALID) &&
( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
(GROUP_TEI == GET_TEIFROMAI(*(ptr+OFF_AI))) ))
{
static int lasttei = -1;
if(l2sc->tei != lasttei)
{
NDBGL2(L2_TEI_MSG, "TEI ID Check Req - TEI = %d", l2sc->tei);
lasttei = l2sc->tei;
}
if(l2sc->T202 == TIMER_ACTIVE)
i4b_T202_stop(l2sc);
i4b_tei_chkresp(l2sc);
}
break;
case MT_ID_REMOVE:
if( (l2sc->tei_valid == TEI_VALID) &&
( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
(l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI)))))
{
l2sc->tei_valid = TEI_INVALID;
l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
log(LOG_INFO, "i4b: bri %d, removed TEI = %d = 0x%02x\n", l2sc->bri, l2sc->tei, l2sc->tei);
NDBGL2(L2_TEI_MSG, "TEI ID Remove - TEI = %d", l2sc->tei);
i4b_mdl_status_ind(l2sc->bri, STI_TEIASG, -1);
i4b_next_l2state(l2sc, EV_MDREMRQ);
}
break;
default:
NDBGL2(L2_TEI_ERR, "UNKNOWN TEI MGMT Frame, type = 0x%x", *(ptr + OFF_MT));
i4b_print_frame(m->m_len, m->m_data);
break;
}
i4b_Dfreembuf(m);
}
/*---------------------------------------------------------------------------*
* allocate and fill up a TEI management frame for sending
*---------------------------------------------------------------------------*/
static struct mbuf *
build_tei_mgmt_frame(l2_softc_t *l2sc, unsigned char type)
{
struct mbuf *m;
if((m = i4b_Dgetmbuf(TEI_MGMT_FRM_LEN)) == NULL)
return(NULL);
m->m_data[TEIM_SAPIO] = 0xfc; /* SAPI = 63, CR = 0, EA = 0 */
m->m_data[TEIM_TEIO] = 0xff; /* TEI = 127, EA = 1 */
m->m_data[TEIM_UIO] = UI; /* UI */
m->m_data[TEIM_MEIO] = MEI; /* MEI */
m->m_data[TEIM_MTO] = type; /* message type */
switch(type)
{
case MT_ID_REQEST:
i4b_make_rand_ri(l2sc);
m->m_data[TEIM_RILO] = l2sc->last_ril;
m->m_data[TEIM_RIHO] = l2sc->last_rih;
m->m_data[TEIM_AIO] = (GROUP_TEI << 1) | 0x01;
break;
case MT_ID_CHK_RSP:
i4b_make_rand_ri(l2sc);
m->m_data[TEIM_RILO] = l2sc->last_ril;
m->m_data[TEIM_RIHO] = l2sc->last_rih;
m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
break;
case MT_ID_VERIFY:
m->m_data[TEIM_RILO] = 0;
m->m_data[TEIM_RIHO] = 0;
m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
break;
default:
i4b_Dfreembuf(m);
panic("build_tei_mgmt_frame: invalid type");
break;
}
l2sc->stat.tx_tei++;
return(m);
}
/*---------------------------------------------------------------------------*
* i4b_tei_assign - TEI assignment procedure (Q.921, 5.3.2, pp 24)
* T202func and N202 _MUST_ be set prior to calling this function !
*---------------------------------------------------------------------------*/
void
i4b_tei_assign(l2_softc_t *l2sc)
{
struct mbuf *m;
NDBGL2(L2_TEI_MSG, "tx TEI ID_Request");
m = build_tei_mgmt_frame(l2sc, MT_ID_REQEST);
if(m == NULL)
panic("i4b_tei_assign: no mbuf");
i4b_T202_start(l2sc);
l2sc->driver->ph_data_req(l2sc->l1_token, m, MBUF_FREE);
}
/*---------------------------------------------------------------------------*
* i4b_tei_assign - TEI verify procedure (Q.921, 5.3.5, pp 29)
* T202func and N202 _MUST_ be set prior to calling this function !
*---------------------------------------------------------------------------*/
void
i4b_tei_verify(l2_softc_t *l2sc)
{
struct mbuf *m;
NDBGL2(L2_TEI_MSG, "tx TEI ID_Verify");
m = build_tei_mgmt_frame(l2sc, MT_ID_VERIFY);
if(m == NULL)
panic("i4b_tei_verify: no mbuf");
i4b_T202_start(l2sc);
l2sc->driver->ph_data_req(l2sc->l1_token, m, MBUF_FREE);
}
/*---------------------------------------------------------------------------*
* i4b_tei_chkresp - TEI check response procedure (Q.921, 5.3.5, pp 29)
*---------------------------------------------------------------------------*/
void
i4b_tei_chkresp(l2_softc_t *l2sc)
{
struct mbuf *m;
static int lasttei = 0;
if(l2sc->tei != lasttei)
{
lasttei = l2sc->tei;
NDBGL2(L2_TEI_MSG, "tx TEI ID_Check_Response");
}
m = build_tei_mgmt_frame(l2sc, MT_ID_CHK_RSP);
if(m == NULL)
panic("i4b_tei_chkresp: no mbuf");
l2sc->driver->ph_data_req(l2sc->l1_token, m, MBUF_FREE);
}
/*---------------------------------------------------------------------------*
* generate some 16 bit "random" number used for TEI mgmt Ri field
*---------------------------------------------------------------------------*/
void
i4b_make_rand_ri(l2_softc_t *l2sc)
{
#if defined(__FreeBSD__)
u_short val;
#ifdef RANDOMDEV
read_random((char *)&val, sizeof(val));
#else
val = (u_short)random();
#endif /* RANDOMDEV */
#else
register u_short val;
register int i;
static int called = 42;
val = (l2sc->last_rih << 8) | l2sc->last_ril;
val += ++called;
for(i=0; i < 50 ; i++, val++)
{
val |= l2sc->bri+i;
val <<= i;
val ^= (time.tv_sec >> 16) ^ time.tv_usec;
val <<= i;
val ^= time.tv_sec ^ (time.tv_usec >> 16);
if(val != 0 && val != 0xffff)
break;
}
#endif
l2sc->last_rih = (val >> 8) & 0x00ff;
l2sc->last_ril = val & 0x00ff;
}
#endif /* NI4BQ921 > 0 */
Reference in New Issue View Git Blame Copy Permalink