mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
299 lines
8.5 KiB
C
299 lines
8.5 KiB
C
/*
|
|
* Copyright (c) 1997, 1999 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_uframe.c - routines for handling U-frames
|
|
* -----------------------------------------------
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* last edit-date: [Fri May 28 16:14:32 1999]
|
|
*
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#ifdef __FreeBSD__
|
|
#include "i4bq921.h"
|
|
#else
|
|
#define NI4BQ921 1
|
|
#endif
|
|
#if NI4BQ921 > 0
|
|
|
|
#include <sys/param.h>
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
|
#include <sys/ioccom.h>
|
|
#else
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
|
|
#ifdef __FreeBSD__
|
|
#include <machine/i4b_debug.h>
|
|
#include <machine/i4b_ioctl.h>
|
|
#else
|
|
#include <i4b/i4b_debug.h>
|
|
#include <i4b/i4b_ioctl.h>
|
|
#endif
|
|
|
|
#include <i4b/include/i4b_l1l2.h>
|
|
#include <i4b/include/i4b_l2l3.h>
|
|
#include <i4b/include/i4b_isdnq931.h>
|
|
#include <i4b/include/i4b_mbuf.h>
|
|
|
|
#include <i4b/layer2/i4b_l2.h>
|
|
#include <i4b/layer2/i4b_l2fsm.h>
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* process a received U-frame
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_rxd_u_frame(int unit, struct mbuf *m)
|
|
{
|
|
l2_softc_t *l2sc = &l2_softc[unit];
|
|
u_char *ptr = m->m_data;
|
|
|
|
int sapi = GETSAPI(*(ptr + OFF_SAPI));
|
|
int tei = GETTEI(*(ptr + OFF_TEI));
|
|
int pfbit = GETUPF(*(ptr + OFF_CNTL));
|
|
|
|
switch(*(ptr + OFF_CNTL) & ~UPFBIT)
|
|
{
|
|
/* commands */
|
|
|
|
case SABME:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_sabme++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("SABME, sapi = %d, tei = %d\n", sapi, tei));
|
|
l2sc->rxd_PF = pfbit;
|
|
i4b_next_l2state(l2sc, EV_RXSABME);
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
case UI:
|
|
if(sapi == SAPI_L2M &&
|
|
tei == GROUP_TEI &&
|
|
*(ptr + OFF_MEI) == MEI)
|
|
{
|
|
/* layer 2 management (SAPI = 63) */
|
|
l2sc->stat.rx_tei++;
|
|
i4b_tei_rxframe(unit, m);
|
|
}
|
|
else if(sapi == SAPI_CCP && tei == GROUP_TEI)
|
|
{
|
|
/* call control (SAPI = 0) */
|
|
l2sc->stat.rx_ui++;
|
|
/* strip ui header */
|
|
m_adj(m, UI_HDR_LEN);
|
|
/* to upper layer */
|
|
DL_Unit_Data_Ind(unit, m);
|
|
}
|
|
else
|
|
{
|
|
l2sc->stat.err_rx_badui++;
|
|
DBGL2(L2_U_ERR, "i4b_rxd_u_frame", ("unknown UI frame!\n"));
|
|
i4b_Dfreembuf(m);
|
|
}
|
|
break;
|
|
|
|
case DISC:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_disc++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("DISC, sapi = %d, tei = %d\n", sapi, tei));
|
|
l2sc->rxd_PF = pfbit;
|
|
i4b_next_l2state(l2sc, EV_RXDISC);
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
case XID:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_xid++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("XID, sapi = %d, tei = %d\n", sapi, tei));
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
/* responses */
|
|
|
|
case DM:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_dm++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("DM, sapi = %d, tei = %d\n", sapi, tei));
|
|
i4b_print_frame(m->m_len, m->m_data);
|
|
l2sc->rxd_PF = pfbit;
|
|
i4b_next_l2state(l2sc, EV_RXDM);
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
case UA:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_ua++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("UA, sapi = %d, tei = %d\n", sapi, tei));
|
|
l2sc->rxd_PF = pfbit;
|
|
i4b_next_l2state(l2sc, EV_RXUA);
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
case FRMR:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
l2sc->stat.rx_frmr++;
|
|
DBGL2(L2_U_MSG, "i4b_rxd_u_frame", ("FRMR, sapi = %d, tei = %d\n", sapi, tei));
|
|
l2sc->rxd_PF = pfbit;
|
|
i4b_next_l2state(l2sc, EV_RXFRMR);
|
|
}
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
|
|
default:
|
|
if((l2sc->tei_valid == TEI_VALID) &&
|
|
(l2sc->tei == GETTEI(*(ptr+OFF_TEI))))
|
|
{
|
|
DBGL2(L2_U_ERR, "i4b_rxd_u_frame", ("UNKNOWN TYPE ERROR, sapi = %d, tei = %d, frame = ", sapi, tei));
|
|
i4b_print_frame(m->m_len, m->m_data);
|
|
}
|
|
else
|
|
{
|
|
DBGL2(L2_U_ERR, "i4b_rxd_u_frame", ("not mine - UNKNOWN TYPE ERROR, sapi = %d, tei = %d, frame = ", sapi, tei));
|
|
i4b_print_frame(m->m_len, m->m_data);
|
|
}
|
|
l2sc->stat.err_rx_badui++;
|
|
i4b_Dfreembuf(m);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* build U-frame for sending
|
|
*---------------------------------------------------------------------------*/
|
|
struct mbuf *
|
|
i4b_build_u_frame(l2_softc_t *l2sc, crbit_to_nt_t crbit, pbit_t pbit, u_char type)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
if((m = i4b_Dgetmbuf(U_FRAME_LEN)) == NULL)
|
|
return(NULL);
|
|
|
|
PUTSAPI(SAPI_CCP, crbit, m->m_data[OFF_SAPI]);
|
|
|
|
PUTTEI(l2sc->tei, m->m_data[OFF_TEI]);
|
|
|
|
if(pbit)
|
|
m->m_data[OFF_CNTL] = type | UPBITSET;
|
|
else
|
|
m->m_data[OFF_CNTL] = type & ~UPBITSET;
|
|
|
|
return(m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* transmit SABME command
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_tx_sabme(l2_softc_t *l2sc, pbit_t pbit)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
l2sc->stat.tx_sabme++;
|
|
DBGL2(L2_U_MSG, "i4b_tx_sabme", ("tx SABME, tei = %d\n", l2sc->tei));
|
|
m = i4b_build_u_frame(l2sc, CR_CMD_TO_NT, pbit, SABME);
|
|
PH_Data_Req(l2sc->unit, m, MBUF_FREE);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* transmit DM response
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_tx_dm(l2_softc_t *l2sc, fbit_t fbit)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
l2sc->stat.tx_dm++;
|
|
DBGL2(L2_U_MSG, "i4b_tx_dm", ("tx DM, tei = %d\n", l2sc->tei));
|
|
m = i4b_build_u_frame(l2sc, CR_RSP_TO_NT, fbit, DM);
|
|
PH_Data_Req(l2sc->unit, m, MBUF_FREE);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* transmit DISC command
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_tx_disc(l2_softc_t *l2sc, pbit_t pbit)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
l2sc->stat.tx_disc++;
|
|
DBGL2(L2_U_MSG, "i4b_tx_disc", ("tx DISC, tei = %d\n", l2sc->tei));
|
|
m = i4b_build_u_frame(l2sc, CR_CMD_TO_NT, pbit, DISC);
|
|
PH_Data_Req(l2sc->unit, m, MBUF_FREE);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* transmit UA response
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_tx_ua(l2_softc_t *l2sc, fbit_t fbit)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
l2sc->stat.tx_ua++;
|
|
DBGL2(L2_U_MSG, "i4b_tx_ua", ("tx UA, tei = %d\n", l2sc->tei));
|
|
m = i4b_build_u_frame(l2sc, CR_RSP_TO_NT, fbit, UA);
|
|
PH_Data_Req(l2sc->unit, m, MBUF_FREE);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* transmit FRMR response
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_tx_frmr(l2_softc_t *l2sc, fbit_t fbit)
|
|
{
|
|
struct mbuf *m;
|
|
|
|
l2sc->stat.tx_frmr++;
|
|
DBGL2(L2_U_MSG, "i4b_tx_frmr", ("tx FRMR, tei = %d\n", l2sc->tei));
|
|
m = i4b_build_u_frame(l2sc, CR_RSP_TO_NT, fbit, FRMR);
|
|
PH_Data_Req(l2sc->unit, m, MBUF_FREE);
|
|
}
|
|
|
|
#endif /* NI4BQ921 > 0 */
|