/* * 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 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 #include #else #include #endif #include #include #include #include #include #ifdef __FreeBSD__ #include #include #else #include #include #endif #include #include #include #include #include #include /*---------------------------------------------------------------------------* * 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 */