diff options
Diffstat (limited to 'sys/i4b/layer2/i4b_util.c')
| -rw-r--r-- | sys/i4b/layer2/i4b_util.c | 312 |
1 files changed, 0 insertions, 312 deletions
diff --git a/sys/i4b/layer2/i4b_util.c b/sys/i4b/layer2/i4b_util.c deleted file mode 100644 index 9f8fe196c56cc..0000000000000 --- a/sys/i4b/layer2/i4b_util.c +++ /dev/null @@ -1,312 +0,0 @@ -/* - * 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_util.c - layer 2 utility routines - * ------------------------------------- - * - * $Id: i4b_util.c,v 1.15 1998/12/05 18:05:26 hm Exp $ - * - * last edit-date: [Sat Dec 5 18:31:10 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_global.h> -#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> - -/*---------------------------------------------------------------------------* - * routine ESTABLISH DATA LINK (Q.921 03/93 page 83) - *---------------------------------------------------------------------------*/ -void -i4b_establish_data_link(l2_softc_t *l2sc) -{ - i4b_l1_activate(l2sc); - - i4b_clear_exception_conditions(l2sc); - - l2sc->RC = 0; - - i4b_tx_sabme(l2sc, P1); - - i4b_T200_restart(l2sc); - - i4b_T203_stop(l2sc); -} - -/*---------------------------------------------------------------------------* - * routine CLEAR EXCEPTION CONDITIONS (Q.921 03/93 page 83) - *---------------------------------------------------------------------------*/ -void -i4b_clear_exception_conditions(l2_softc_t *l2sc) -{ - -/*XXX -------------------------------------------------------------- */ -/*XXX is this really appropriate here or should it moved elsewhere ? */ - - i4b_Dcleanifq(&l2sc->i_queue); - - if(l2sc->ua_num != UA_EMPTY) - { - i4b_Dfreembuf(l2sc->ua_frame); - l2sc->ua_num = UA_EMPTY; - } -/*XXX -------------------------------------------------------------- */ - - l2sc->peer_busy = 0; - - l2sc->rej_excpt = 0; - - l2sc->own_busy = 0; - - l2sc->ack_pend = 0; -} - -/*---------------------------------------------------------------------------* - * routine TRANSMIT ENQUIRE (Q.921 03/93 page 83) - *---------------------------------------------------------------------------*/ -void -i4b_transmit_enquire(l2_softc_t *l2sc) -{ - if(l2sc->own_busy) - i4b_tx_rnr_command(l2sc, P1); - else - i4b_tx_rr_command(l2sc, P1); - - l2sc->ack_pend = 0; - - i4b_T200_start(l2sc); -} - -/*---------------------------------------------------------------------------* - * routine NR ERROR RECOVERY (Q.921 03/93 page 83) - *---------------------------------------------------------------------------*/ -void -i4b_nr_error_recovery(l2_softc_t *l2sc) -{ - i4b_mdl_error_ind(l2sc, "i4b_nr_error_recovery", MDL_ERR_J); - - i4b_establish_data_link(l2sc); - - l2sc->l3initiated = 0; -} - -/*---------------------------------------------------------------------------* - * routine ENQUIRY RESPONSE (Q.921 03/93 page 84) - *---------------------------------------------------------------------------*/ -void -i4b_enquiry_response(l2_softc_t *l2sc) -{ - if(l2sc->own_busy) - i4b_tx_rnr_response(l2sc, F1); - else - i4b_tx_rr_response(l2sc, F1); - - l2sc->ack_pend = 0; -} - -/*---------------------------------------------------------------------------* - * routine INVOKE RETRANSMISSION (Q.921 03/93 page 84) - *---------------------------------------------------------------------------*/ -void -i4b_invoke_retransmission(l2_softc_t *l2sc, int nr) -{ - DBGL2(L2_ERROR, "i4b_invoke_retransmission", ("nr = %d\n", nr )); - - while(l2sc->vs != nr) - { - DBGL2(L2_ERROR, "i4b_invoke_retransmission", ("nr != vs, nr = %d, vs = %d\n", nr, l2sc->vs)); - - M128DEC(l2sc->vs); - -/* XXXXXXXXXXXXXXXXX */ - - if((l2sc->ua_num != UA_EMPTY) && (l2sc->vs == l2sc->ua_num)) - { - IF_ENQUEUE(&l2sc->i_queue, l2sc->ua_frame); - l2sc->ua_num = UA_EMPTY; - } - else - { - DBGL2(L2_ERROR, "i4b_invoke_retransmission", ("ERROR, l2sc->vs = %d, l2sc->ua_num = %d \n",l2sc->vs, l2sc->ua_num)); - } - -/* XXXXXXXXXXXXXXXXX */ - - i4b_i_frame_queued_up(l2sc); - } -} - -/*---------------------------------------------------------------------------* - * routine ACKNOWLEDGE PENDING (Q.921 03/93 p 70) - *---------------------------------------------------------------------------*/ -void -i4b_acknowledge_pending(l2_softc_t *l2sc) -{ - if(l2sc->ack_pend) - { - l2sc->ack_pend = 0; - i4b_tx_rr_response(l2sc, F0); - } -} - -/*---------------------------------------------------------------------------* - * i4b_print_frame - just print the hex contents of a frame - *---------------------------------------------------------------------------*/ -void -i4b_print_frame(int len, u_char *buf) -{ -#ifdef DO_I4B_DEBUG - int i; - - if (!(i4b_l2_debug & L2_ERROR)) /* XXXXXXXXXXXXXXXXXXXXX */ - return; - - for(i = 0; i < len; i++) - printf(" 0x%x", buf[i]); - printf("\n"); -#endif -} - -/*---------------------------------------------------------------------------* - * i4b_print_l2var - print some l2softc vars - *---------------------------------------------------------------------------*/ -void -i4b_print_l2var(l2_softc_t *l2sc) -{ - DBGL2(L2_ERROR, "i4b_print_l2var", ("unit%d V(R)=%d, V(S)=%d, V(A)=%d,ACKP=%d,PBSY=%d,OBSY=%d\n", - l2sc->unit, - l2sc->vr, - l2sc->vs, - l2sc->va, - l2sc->ack_pend, - l2sc->peer_busy, - l2sc->own_busy)); -} - -/*---------------------------------------------------------------------------* - * got s or i frame, check if valid ack for last sent frame - *---------------------------------------------------------------------------*/ -void -i4b_rxd_ack(l2_softc_t *l2sc, int nr) -{ - -#ifdef NOTDEF - DBGL2(L2_ERROR, "i4b_rxd_ack", ("N(R)=%d, UA=%d, V(R)=%d, V(S)=%d, V(A)=%d\n", - nr, - l2sc->ua_num, - l2sc->vr, - l2sc->vs, - l2sc->va)); -#endif - - if(l2sc->ua_num != UA_EMPTY) - { - int s; - - M128DEC(nr); - - if(l2sc->ua_num != nr) - DBGL2(L2_ERROR, "i4b_rxd_ack", ("((N(R)-1)=%d) != (UA=%d) !!!\n", nr, l2sc->ua_num)); - - s = SPLI4B(); - - i4b_Dfreembuf(l2sc->ua_frame); - l2sc->ua_num = UA_EMPTY; - - splx(s); - } -} - -/*---------------------------------------------------------------------------* - * if not already active, activate layer 1 - *---------------------------------------------------------------------------*/ -void -i4b_l1_activate(l2_softc_t *l2sc) -{ - if(l2sc->ph_active == PH_INACTIVE) - { - l2sc->ph_active = PH_ACTIVEPEND; - PH_Act_Req(l2sc->unit); - } -}; - -/*---------------------------------------------------------------------------* - * check for v(a) <= n(r) <= v(s) - * nr = receive sequence frame counter, va = acknowledge sequence frame - * counter and vs = transmit sequence frame counter - *---------------------------------------------------------------------------*/ -int -i4b_l2_nr_ok(int nr, int va, int vs) -{ - if((va > nr) && ((nr != 0) || (va != 127))) - { - DBGL2(L2_ERROR, "i4b_l2_nr_ok", ("ERROR, va = %d, nr = %d, vs = %d [1]\n", va, nr, vs)); - return 0; /* fail */ - } - - if((nr > vs) && ((vs != 0) || (nr != 127))) - { - DBGL2(L2_ERROR, "i4b_l2_nr_ok", ("ERROR, va = %d, nr = %d, vs = %d [2]\n", va, nr, vs)); - return 0; /* fail */ - } - - return 1; /* good */ -} - -#endif /* NI4BQ921 > 0 */ - |