19c749625f
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis, who has done a tremendous amount of work to bring us this far. There are still some outstanding issues and files to bring into the tree, and for now it will be needed to pick up all the extra docs from the isdn4bsd release. It is probably also a very good idea to subscribe to the isdn@freebsd.org mailing list before you try this out. These files correspond to release "beta Version 0.70.00 / December 1998" from Hellmuth.
216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
/*
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* Copyright (c) 1997, 1998 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_sframe.c - s frame handling routines
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* ----------------------------------------
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*
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* $Id: i4b_sframe.c,v 1.8 1998/12/05 18:05:21 hm Exp $
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*
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* last edit-date: [Sat Dec 5 18:30:02 1998]
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*
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*---------------------------------------------------------------------------*/
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#ifdef __FreeBSD__
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#include "i4bq921.h"
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#else
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#define NI4BQ921 1
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#endif
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#if NI4BQ921 > 0
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#include <sys/param.h>
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <sys/ioccom.h>
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#else
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#include <sys/ioctl.h>
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#endif
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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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#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 <i4b/i4b_debug.h>
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#include <i4b/i4b_ioctl.h>
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#endif
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#include <i4b/include/i4b_l1l2.h>
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#include <i4b/include/i4b_l2l3.h>
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#include <i4b/include/i4b_isdnq931.h>
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#include <i4b/include/i4b_mbuf.h>
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#include <i4b/layer2/i4b_l2.h>
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#include <i4b/layer2/i4b_l2fsm.h>
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/*---------------------------------------------------------------------------*
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* process s frame
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*---------------------------------------------------------------------------*/
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void
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i4b_rxd_s_frame(int unit, struct mbuf *m)
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{
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l2_softc_t *l2sc = &l2_softc[unit];
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u_char *ptr = m->m_data;
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if(!((l2sc->tei_valid == TEI_VALID) &&
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(l2sc->tei == GETTEI(*(ptr+OFF_TEI)))))
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{
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i4b_Dfreembuf(m);
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return;
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}
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l2sc->rxd_CR = GETCR(*(ptr + OFF_SAPI));
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l2sc->rxd_PF = GETSPF(*(ptr + OFF_SNR));
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l2sc->rxd_NR = GETSNR(*(ptr + OFF_SNR));
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i4b_rxd_ack(l2sc, l2sc->rxd_NR);
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switch(*(ptr + OFF_SRCR))
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{
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case RR:
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DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd RR, N(R) = %d\n", l2sc->rxd_NR));
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i4b_next_l2state(l2sc, EV_RXRR);
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break;
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case RNR:
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DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd RNR, N(R) = %d\n", l2sc->rxd_NR));
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i4b_next_l2state(l2sc, EV_RXRNR);
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break;
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case REJ:
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DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd REJ, N(R) = %d\n", l2sc->rxd_NR));
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i4b_next_l2state(l2sc, EV_RXREJ);
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break;
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default:
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DBGL2(L2_S_ERR, "i4b_rxd_s_frame", ("ERROR, unknown code, frame = \n"));
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i4b_print_frame(m->m_len, m->m_data);
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break;
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}
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i4b_Dfreembuf(m);
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}
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/*---------------------------------------------------------------------------*
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* transmit RR command
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*---------------------------------------------------------------------------*/
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void
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i4b_tx_rr_command(l2_softc_t *l2sc, pbit_t pbit)
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{
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struct mbuf *m;
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DBGL2(L2_S_MSG, "i4b_tx_rr_command", ("tx RR, unit = %d\n", l2sc->unit));
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m = i4b_build_s_frame(l2sc, CR_CMD_TO_NT, pbit, RR);
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PH_Data_Req(l2sc->unit, m, MBUF_FREE);
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}
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/*---------------------------------------------------------------------------*
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* transmit RR response
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*---------------------------------------------------------------------------*/
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void
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i4b_tx_rr_response(l2_softc_t *l2sc, fbit_t fbit)
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{
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struct mbuf *m;
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DBGL2(L2_S_MSG, "i4b_tx_rr_response", ("tx RR, unit = %d\n", l2sc->unit));
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m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, RR);
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PH_Data_Req(l2sc->unit, m, MBUF_FREE);
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}
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/*---------------------------------------------------------------------------*
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* transmit RNR command
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*---------------------------------------------------------------------------*/
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void
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i4b_tx_rnr_command(l2_softc_t *l2sc, pbit_t pbit)
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{
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struct mbuf *m;
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DBGL2(L2_S_MSG, "i4b_tx_rnr_command", ("tx RNR, unit = %d\n", l2sc->unit));
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m = i4b_build_s_frame(l2sc, CR_CMD_TO_NT, pbit, RNR);
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PH_Data_Req(l2sc->unit, m, MBUF_FREE);
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}
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/*---------------------------------------------------------------------------*
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* transmit RNR response
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*---------------------------------------------------------------------------*/
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void
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i4b_tx_rnr_response(l2_softc_t *l2sc, fbit_t fbit)
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{
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struct mbuf *m;
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DBGL2(L2_S_MSG, "i4b_tx_rnr_response", ("tx RNR, unit = %d\n", l2sc->unit));
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m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, RNR);
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PH_Data_Req(l2sc->unit, m, MBUF_FREE);
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}
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/*---------------------------------------------------------------------------*
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* transmit REJ response
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*---------------------------------------------------------------------------*/
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void
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i4b_tx_rej_response(l2_softc_t *l2sc, fbit_t fbit)
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{
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struct mbuf *m;
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DBGL2(L2_S_MSG, "i4b_tx_rej_response", ("tx REJ, unit = %d\n", l2sc->unit));
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m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, REJ);
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PH_Data_Req(l2sc->unit, m, MBUF_FREE);
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}
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/*---------------------------------------------------------------------------*
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* build S-frame for sending
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*---------------------------------------------------------------------------*/
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struct mbuf *
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i4b_build_s_frame(l2_softc_t *l2sc, crbit_to_nt_t crbit, pbit_t pbit, u_char type)
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{
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struct mbuf *m;
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if((m = i4b_Dgetmbuf(S_FRAME_LEN)) == NULL)
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return(NULL);
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PUTSAPI(SAPI_CCP, crbit, m->m_data[OFF_SAPI]);
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PUTTEI(l2sc->tei, m->m_data[OFF_TEI]);
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m->m_data[OFF_SRCR] = type;
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m->m_data[OFF_SNR] = (l2sc->vr << 1) | (pbit & 0x01);
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return(m);
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}
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#endif /* NI4BQ921 > 0 */
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