diff options
Diffstat (limited to 'sys/i4b/layer2/i4b_sframe.c')
| -rw-r--r-- | sys/i4b/layer2/i4b_sframe.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/sys/i4b/layer2/i4b_sframe.c b/sys/i4b/layer2/i4b_sframe.c new file mode 100644 index 0000000..f8d14ba --- /dev/null +++ b/sys/i4b/layer2/i4b_sframe.c @@ -0,0 +1,215 @@ +/* + * Copyright (c) 1997, 1998 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_sframe.c - s frame handling routines + * ---------------------------------------- + * + * $Id: i4b_sframe.c,v 1.8 1998/12/05 18:05:21 hm Exp $ + * + * last edit-date: [Sat Dec 5 18:30:02 1998] + * + *---------------------------------------------------------------------------*/ + +#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 s frame + *---------------------------------------------------------------------------*/ +void +i4b_rxd_s_frame(int unit, struct mbuf *m) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + u_char *ptr = m->m_data; + + if(!((l2sc->tei_valid == TEI_VALID) && + (l2sc->tei == GETTEI(*(ptr+OFF_TEI))))) + { + i4b_Dfreembuf(m); + return; + } + + l2sc->rxd_CR = GETCR(*(ptr + OFF_SAPI)); + l2sc->rxd_PF = GETSPF(*(ptr + OFF_SNR)); + l2sc->rxd_NR = GETSNR(*(ptr + OFF_SNR)); + + i4b_rxd_ack(l2sc, l2sc->rxd_NR); + + switch(*(ptr + OFF_SRCR)) + { + case RR: + DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd RR, N(R) = %d\n", l2sc->rxd_NR)); + i4b_next_l2state(l2sc, EV_RXRR); + break; + + case RNR: + DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd RNR, N(R) = %d\n", l2sc->rxd_NR)); + i4b_next_l2state(l2sc, EV_RXRNR); + break; + + case REJ: + DBGL2(L2_S_MSG, "i4b_rxd_s_frame", ("rx'd REJ, N(R) = %d\n", l2sc->rxd_NR)); + i4b_next_l2state(l2sc, EV_RXREJ); + break; + + default: + DBGL2(L2_S_ERR, "i4b_rxd_s_frame", ("ERROR, unknown code, frame = \n")); + i4b_print_frame(m->m_len, m->m_data); + break; + } + i4b_Dfreembuf(m); +} + +/*---------------------------------------------------------------------------* + * transmit RR command + *---------------------------------------------------------------------------*/ +void +i4b_tx_rr_command(l2_softc_t *l2sc, pbit_t pbit) +{ + struct mbuf *m; + + DBGL2(L2_S_MSG, "i4b_tx_rr_command", ("tx RR, unit = %d\n", l2sc->unit)); + + m = i4b_build_s_frame(l2sc, CR_CMD_TO_NT, pbit, RR); + + PH_Data_Req(l2sc->unit, m, MBUF_FREE); +} + +/*---------------------------------------------------------------------------* + * transmit RR response + *---------------------------------------------------------------------------*/ +void +i4b_tx_rr_response(l2_softc_t *l2sc, fbit_t fbit) +{ + struct mbuf *m; + + DBGL2(L2_S_MSG, "i4b_tx_rr_response", ("tx RR, unit = %d\n", l2sc->unit)); + + m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, RR); + + PH_Data_Req(l2sc->unit, m, MBUF_FREE); +} + +/*---------------------------------------------------------------------------* + * transmit RNR command + *---------------------------------------------------------------------------*/ +void +i4b_tx_rnr_command(l2_softc_t *l2sc, pbit_t pbit) +{ + struct mbuf *m; + + DBGL2(L2_S_MSG, "i4b_tx_rnr_command", ("tx RNR, unit = %d\n", l2sc->unit)); + + m = i4b_build_s_frame(l2sc, CR_CMD_TO_NT, pbit, RNR); + + PH_Data_Req(l2sc->unit, m, MBUF_FREE); +} + +/*---------------------------------------------------------------------------* + * transmit RNR response + *---------------------------------------------------------------------------*/ +void +i4b_tx_rnr_response(l2_softc_t *l2sc, fbit_t fbit) +{ + struct mbuf *m; + + DBGL2(L2_S_MSG, "i4b_tx_rnr_response", ("tx RNR, unit = %d\n", l2sc->unit)); + + m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, RNR); + + PH_Data_Req(l2sc->unit, m, MBUF_FREE); +} + +/*---------------------------------------------------------------------------* + * transmit REJ response + *---------------------------------------------------------------------------*/ +void +i4b_tx_rej_response(l2_softc_t *l2sc, fbit_t fbit) +{ + struct mbuf *m; + + DBGL2(L2_S_MSG, "i4b_tx_rej_response", ("tx REJ, unit = %d\n", l2sc->unit)); + + m = i4b_build_s_frame(l2sc, CR_RSP_TO_NT, fbit, REJ); + + PH_Data_Req(l2sc->unit, m, MBUF_FREE); +} + +/*---------------------------------------------------------------------------* + * build S-frame for sending + *---------------------------------------------------------------------------*/ +struct mbuf * +i4b_build_s_frame(l2_softc_t *l2sc, crbit_to_nt_t crbit, pbit_t pbit, u_char type) +{ + struct mbuf *m; + + if((m = i4b_Dgetmbuf(S_FRAME_LEN)) == NULL) + return(NULL); + + PUTSAPI(SAPI_CCP, crbit, m->m_data[OFF_SAPI]); + + PUTTEI(l2sc->tei, m->m_data[OFF_TEI]); + + m->m_data[OFF_SRCR] = type; + + m->m_data[OFF_SNR] = (l2sc->vr << 1) | (pbit & 0x01); + + return(m); +} + +#endif /* NI4BQ921 > 0 */ |
