FreeBSD-5.3/sys/i4b/layer3/i4b_l2if.c
/*
* Copyright (c) 1997, 2002 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_l2if.c - Layer 3 interface to Layer 2
* -------------------------------------------
* last edit-date: [Sun Aug 11 12:48:41 2002]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i4b/layer3/i4b_l2if.c,v 1.15 2003/06/10 23:59:33 obrien Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#include <i4b/include/i4b_isdnq931.h>
#include <i4b/include/i4b_l2l3.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/layer3/i4b_l3.h>
#include <i4b/layer3/i4b_l3fsm.h>
#include <i4b/layer3/i4b_q931.h>
static unsigned char make_q931_cause(cause_t cause);
/*---------------------------------------------------------------------------*
* this converts our internal state (number) to the number specified
* in Q.931 and is used for reporting our state in STATUS messages.
*---------------------------------------------------------------------------*/
int i4b_status_tab[] = {
0, /* ST_U0, */
1, /* ST_U1, */
3, /* ST_U3, */
4, /* ST_U4, */
6, /* ST_U6, */
7, /* ST_U7, */
8, /* ST_U8, */
9, /* ST_U9, */
10, /* ST_U10, */
11, /* ST_U11, */
12, /* ST_U12, */
19, /* ST_U19, */
6, /* ST_IWA, */
6, /* ST_IWR, */
1, /* ST_OW, */
6, /* ST_IWL, */
};
/*---------------------------------------------------------------------------*
* return a valid q.931/q.850 cause from any of the internal causes
*---------------------------------------------------------------------------*/
static unsigned char
make_q931_cause(cause_t cause)
{
register unsigned char ret;
switch(GET_CAUSE_TYPE(cause))
{
case CAUSET_Q850:
ret = GET_CAUSE_VAL(cause);
break;
case CAUSET_I4B:
ret = cause_tab_q931[GET_CAUSE_VAL(cause)];
break;
default:
panic("make_q931_cause: unknown cause type!");
break;
}
ret |= EXT_LAST;
return(ret);
}
/*---------------------------------------------------------------------------*
* return status of data link
*---------------------------------------------------------------------------*/
int
i4b_get_dl_stat(call_desc_t *cd)
{
return(ctrl_desc[cd->controller].dl_est);
}
/*---------------------------------------------------------------------------*
* DL ESTABLISH INDICATION from Layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_establish_ind(int unit)
{
int i;
int found = 0;
NDBGL2(L2_PRIM, "DL-ESTABLISH-IND unit %d",unit);
/* first set DL up in controller descriptor */
for(i=0; i < nctrl; i++)
{
if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[i].unit == unit))
{
NDBGL3(L3_MSG, "unit=%d DL established!",unit);
ctrl_desc[i].dl_est = DL_UP;
found = 1;
}
}
if(found == 0)
{
NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
return(-1);
}
found = 0;
/* second, inform all (!) active call of the event */
for(i=0; i < N_CALL_DESC; i++)
{
if( (call_desc[i].cdid != 0) &&
(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[call_desc[i].controller].unit == unit))
{
NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
unit, i, call_desc[i].cdid, call_desc[i].cr);
next_l3state(&call_desc[i], EV_DLESTIN);
found++;
}
}
if(found == 0)
{
NDBGL3(L3_ERR, "ERROR, no cdid for unit %d found!", unit);
return(-1);
}
else
{
return(0);
}
}
/*---------------------------------------------------------------------------*
* DL ESTABLISH CONFIRM from Layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_establish_cnf(int unit)
{
int i;
int found = 0;
NDBGL2(L2_PRIM, "DL-ESTABLISH-CONF unit %d",unit);
for(i=0; i < N_CALL_DESC; i++)
{
if( (call_desc[i].cdid != 0) &&
(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[call_desc[i].controller].unit == unit))
{
ctrl_desc[call_desc[i].controller].dl_est = DL_UP;
NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
unit, i, call_desc[i].cdid, call_desc[i].cr);
next_l3state(&call_desc[i], EV_DLESTCF);
found++;
}
}
if(found == 0)
{
NDBGL3(L3_ERR, "ERROR, no cdid for unit %d found!", unit);
return(-1);
}
else
{
return(0);
}
}
/*---------------------------------------------------------------------------*
* DL RELEASE INDICATION from Layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_release_ind(int unit)
{
int i;
int found = 0;
NDBGL2(L2_PRIM, "DL-RELEASE-IND unit %d",unit);
/* first set controller to down */
for(i=0; i < nctrl; i++)
{
if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[i].unit == unit))
{
NDBGL3(L3_MSG, "unit=%d DL released!",unit);
ctrl_desc[i].dl_est = DL_DOWN;
found = 1;
}
}
if(found == 0)
{
NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
return(-1);
}
found = 0;
/* second, inform all (!) active calls of the event */
for(i=0; i < N_CALL_DESC; i++)
{
if( (call_desc[i].cdid != 0) &&
(ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[call_desc[i].controller].unit == unit))
{
NDBGL3(L3_MSG, "unit=%d, index=%d cdid=%u cr=%d",
unit, i, call_desc[i].cdid, call_desc[i].cr);
next_l3state(&call_desc[i], EV_DLRELIN);
found++;
}
}
if(found == 0)
{
/* this is not an error since it might be a normal call end */
NDBGL3(L3_MSG, "no cdid for unit %d found", unit);
}
return(0);
}
/*---------------------------------------------------------------------------*
* DL RELEASE CONFIRM from Layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_release_cnf(int unit)
{
int i;
NDBGL2(L2_PRIM, "DL-RELEASE-CONF unit %d",unit);
for(i=0; i < nctrl; i++)
{
if((ctrl_desc[i].ctrl_type == CTRL_PASSIVE) &&
(ctrl_desc[i].unit == unit))
{
NDBGL3(L3_MSG, "unit=%d DL released!",unit);
ctrl_desc[i].dl_est = DL_DOWN;
return(0);
}
}
NDBGL3(L3_ERR, "ERROR, controller not found for unit=%d!",unit);
return(-1);
}
/*---------------------------------------------------------------------------*
* i4b_dl_data_ind - process a rx'd I-frame got from layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_data_ind(int unit, struct mbuf *m)
{
#ifdef NOTDEF
NDBGL2(L2_PRIM, "DL-DATA-IND unit %d",unit);
#endif
i4b_decode_q931(unit, m->m_len, m->m_data);
i4b_Dfreembuf(m);
return(0);
}
/*---------------------------------------------------------------------------*
* dl_unit_data_ind - process a rx'd U-frame got from layer 2
*---------------------------------------------------------------------------*/
int
i4b_dl_unit_data_ind(int unit, struct mbuf *m)
{
#ifdef NOTDEF
NDBGL2(L2_PRIM, "DL-UNIT-DATA-IND unit %d",unit);
#endif
i4b_decode_q931(unit, m->m_len, m->m_data);
i4b_Dfreembuf(m);
return(0);
}
/*---------------------------------------------------------------------------*
* send CONNECT message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_connect(call_desc_t *cd)
{
struct mbuf *m;
u_char *ptr;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_LEN)) == NULL)
panic("i4b_l3_tx_connect: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = CONNECT; /* message type = connect */
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send RELEASE COMPLETE message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_release_complete(call_desc_t *cd, int send_cause_flag)
{
struct mbuf *m;
u_char *ptr;
int len = I_FRAME_HDRLEN + MSG_RELEASE_COMPLETE_LEN;
if(send_cause_flag == 0)
{
len -= 4;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x",
ctrl_desc[cd->controller].unit, cd->cr);
}
else
{
NDBGL3(L3_PRIM, "unit=%d, cr=0x%02x, cause=0x%x",
ctrl_desc[cd->controller].unit, cd->cr, cd->cause_out);
}
if((m = i4b_Dgetmbuf(len)) == NULL)
panic("i4b_l3_tx_release_complete: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = RELEASE_COMPLETE; /* message type = release complete */
if(send_cause_flag)
{
*ptr++ = IEI_CAUSE; /* cause ie */
*ptr++ = CAUSE_LEN;
*ptr++ = CAUSE_STD_LOC_OUT;
*ptr++ = make_q931_cause(cd->cause_out);
}
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send DISCONNECT message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_disconnect(call_desc_t *cd)
{
struct mbuf *m;
u_char *ptr;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_DISCONNECT_LEN)) == NULL)
panic("i4b_l3_tx_disconnect: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call ref length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = DISCONNECT; /* message type = disconnect */
*ptr++ = IEI_CAUSE; /* cause ie */
*ptr++ = CAUSE_LEN;
*ptr++ = CAUSE_STD_LOC_OUT;
*ptr++ = make_q931_cause(cd->cause_out);
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send SETUP message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_setup(call_desc_t *cd)
{
struct mbuf *m;
u_char *ptr;
int len;
int slen = strlen(cd->src_telno);
int sslen = strlen(cd->src_subaddr);
int dlen = strlen(cd->dst_telno);
int dslen = strlen(cd->dst_subaddr);
int klen = strlen(cd->keypad);
/*
* there is one additional octet if cd->bprot == BPROT_NONE
* NOTE: the selection of a bearer capability by a B L1
* protocol is highly questionable and a better
* mechanism should be used in future. (-hm)
*/
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
len = I_FRAME_HDRLEN +
MSG_SETUP_LEN +
(slen ? (3+slen) : 0) +
(sslen ? (3+sslen) : 0) +
(dlen ? (3+dlen) : 0) +
(dslen ? (3+dslen) : 0) +
(klen ? (2+klen) : 0) +
(cd->bprot == BPROT_NONE ? 1 : 0);
if((m = i4b_Dgetmbuf(len)) == NULL)
{
panic("i4b_l3_tx_setup: can't allocate mbuf\n");
}
cd->crflag = CRF_ORIG; /* we are the originating side */
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call ref length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = SETUP; /* message type = setup */
*ptr++ = IEI_SENDCOMPL; /* sending complete */
*ptr++ = IEI_BEARERCAP; /* bearer capability */
/* XXX
* currently i have no idea if this should be switched by
* the choosen B channel protocol or if there should be a
* separate configuration item for the bearer capability.
* For now, it is switched by the choosen b protocol (-hm)
*/
switch(cd->bprot)
{
case BPROT_NONE: /* telephony */
*ptr++ = IEI_BEARERCAP_LEN+1;
*ptr++ = IT_CAP_SPEECH;
*ptr++ = IT_RATE_64K;
*ptr++ = IT_UL1_G711A;
break;
case BPROT_RHDLC: /* raw HDLC */
if (cd->bcap == BCAP_DOV) /* Data over Voice */
{
*ptr++ = IEI_BEARERCAP_LEN+1;
*ptr++ = IT_CAP_SPEECH;
*ptr++ = IT_RATE_64K;
*ptr++ = IT_UL1_G711A;
}
else
{
*ptr++ = IEI_BEARERCAP_LEN;
*ptr++ = IT_CAP_UNR_DIG_INFO;
*ptr++ = IT_RATE_64K;
}
break;
default:
*ptr++ = IEI_BEARERCAP_LEN;
*ptr++ = IT_CAP_UNR_DIG_INFO;
*ptr++ = IT_RATE_64K;
break;
}
*ptr++ = IEI_CHANNELID; /* channel id */
*ptr++ = IEI_CHANNELID_LEN; /* channel id length */
switch(cd->channelid)
{
case CHAN_B1:
*ptr++ = CHANNELID_B1;
break;
case CHAN_B2:
*ptr++ = CHANNELID_B2;
break;
default:
*ptr++ = CHANNELID_ANY;
break;
}
if(klen)
{
*ptr++ = IEI_KEYPAD; /* keypad facility */
*ptr++ = klen; /* keypad facility length */
strncpy(ptr, cd->keypad, klen);
ptr += klen;
}
if(slen)
{
*ptr++ = IEI_CALLINGPN; /* calling party no */
*ptr++ = IEI_CALLINGPN_LEN+slen;/* calling party no length */
*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
strncpy(ptr, cd->src_telno, slen);
ptr += slen;
}
if(sslen)
{
*ptr++ = IEI_CALLINGPS; /* calling subaddr */
*ptr++ = IEI_CALLINGPS_LEN+sslen; /* calling subaddr len */
*ptr++ = SUBADDR_TYPE_NSAP; /* type = NSAP */
strncpy(ptr, cd->src_subaddr, sslen);
ptr += sslen;
}
if(dlen)
{
*ptr++ = IEI_CALLEDPN; /* called party no */
*ptr++ = IEI_CALLEDPN_LEN+dlen; /* called party no length */
*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
strncpy(ptr, cd->dst_telno, dlen);
ptr += dlen;
}
if(dslen)
{
*ptr++ = IEI_CALLEDPS; /* calling party subaddr */
*ptr++ = IEI_CALLEDPS_LEN+dslen;/* calling party subaddr len */
*ptr++ = SUBADDR_TYPE_NSAP; /* type = NSAP */
strncpy(ptr, cd->dst_subaddr, dslen);
ptr += dslen;
}
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send CONNECT ACKNOWLEDGE message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_connect_ack(call_desc_t *cd)
{
struct mbuf *m;
u_char *ptr;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_ACK_LEN)) == NULL)
panic("i4b_l3_tx_connect_ack: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = CONNECT_ACKNOWLEDGE; /* message type = connect ack */
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send STATUS message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_status(call_desc_t *cd, u_char q850cause)
{
struct mbuf *m;
u_char *ptr;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_STATUS_LEN)) == NULL)
panic("i4b_l3_tx_status: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = STATUS; /* message type = connect ack */
*ptr++ = IEI_CAUSE; /* cause ie */
*ptr++ = CAUSE_LEN;
*ptr++ = CAUSE_STD_LOC_OUT;
*ptr++ = q850cause | EXT_LAST;
*ptr++ = IEI_CALLSTATE; /* call state ie */
*ptr++ = CALLSTATE_LEN;
*ptr++ = i4b_status_tab[cd->Q931state];
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send RELEASE message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_release(call_desc_t *cd, int send_cause_flag)
{
struct mbuf *m;
u_char *ptr;
int len = I_FRAME_HDRLEN + MSG_RELEASE_LEN;
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
if(send_cause_flag == 0)
len -= 4;
if((m = i4b_Dgetmbuf(len)) == NULL)
panic("i4b_l3_tx_release: can't allocate mbuf\n");
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = RELEASE; /* message type = release complete */
if(send_cause_flag)
{
*ptr++ = IEI_CAUSE; /* cause ie */
*ptr++ = CAUSE_LEN;
*ptr++ = CAUSE_STD_LOC_OUT;
*ptr++ = make_q931_cause(cd->cause_out);
}
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}
/*---------------------------------------------------------------------------*
* send ALERTING message
*---------------------------------------------------------------------------*/
void
i4b_l3_tx_alert(call_desc_t *cd)
{
struct mbuf *m;
u_char *ptr;
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_ALERT_LEN)) == NULL)
panic("i4b_l3_tx_alert: can't allocate mbuf\n");
NDBGL3(L3_PRIM, "unit %d, cr = 0x%02x", ctrl_desc[cd->controller].unit, cd->cr);
ptr = m->m_data + I_FRAME_HDRLEN;
*ptr++ = PD_Q931; /* protocol discriminator */
*ptr++ = 0x01; /* call reference length */
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
*ptr++ = ALERT; /* message type = alert */
DL_Data_Req(ctrl_desc[cd->controller].unit, m);
}