diff options
Diffstat (limited to 'sys/i4b/layer2/i4b_iframe.c')
| -rw-r--r-- | sys/i4b/layer2/i4b_iframe.c | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/sys/i4b/layer2/i4b_iframe.c b/sys/i4b/layer2/i4b_iframe.c deleted file mode 100644 index c5e38d80f8ece..0000000000000 --- a/sys/i4b/layer2/i4b_iframe.c +++ /dev/null @@ -1,275 +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_iframe.c - i frame handling routines - * ------------------------------------------ - * - * $Id: i4b_iframe.c,v 1.15 1998/12/05 18:05:06 hm Exp $ - * - * last edit-date: [Sat Dec 5 18:26:16 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> -#include <machine/i4b_trace.h> -#else -#include <i4b/i4b_debug.h> -#include <i4b/i4b_ioctl.h> -#include <i4b/i4b_trace.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> - -/*---------------------------------------------------------------------------* - * process i frame - * implements the routine "I COMMAND" Q.921 03/93 pp 77 - *---------------------------------------------------------------------------*/ -void -i4b_rxd_i_frame(int unit, struct mbuf *m) -{ - l2_softc_t *l2sc = &l2_softc[unit]; - u_char *ptr = m->m_data; - int nr; - int ns; - int p; - int x; - - if(!((l2sc->tei_valid == TEI_VALID) && - (l2sc->tei == GETTEI(*(ptr+OFF_TEI))))) - { - i4b_Dfreembuf(m); - return; - } - - if((l2sc->Q921_state != ST_MULTIFR) && (l2sc->Q921_state != ST_TIMREC)) - { - i4b_Dfreembuf(m); - DBGL2(L2_I_ERR, "i4b_rxd_i_frame", ("ERROR, state != (MF || TR)!\n")); - return; - } - - x = SPLI4B(); - - nr = GETINR(*(ptr + OFF_INR)); - ns = GETINS(*(ptr + OFF_INS)); - p = GETIP(*(ptr + OFF_INR)); - - i4b_rxd_ack(l2sc, nr); /* last packet ack */ - - if(l2sc->own_busy) /* own receiver busy ? */ - { - i4b_Dfreembuf(m); /* yes, discard information */ - - if(p == 1) /* P bit == 1 ? */ - { - i4b_tx_rnr_response(l2sc, p); /* yes, tx RNR */ - l2sc->ack_pend = 0; /* clear ACK pending */ - } - } - else /* own receiver ready */ - { - if(ns == l2sc->vr) /* expected sequence number ? */ - { - M128INC(l2sc->vr); /* yes, update */ - - l2sc->rej_excpt = 0; /* clr reject exception */ - - m_adj(m, I_HDR_LEN); /* strip i frame header */ - - l2sc->iframe_sent = 0; /* reset i acked already */ - - DL_Data_Ind(l2sc->unit, m); /* pass data up */ - - if(!l2sc->iframe_sent) - { - i4b_tx_rr_response(l2sc, p); /* yes, tx RR */ - l2sc->ack_pend = 0; /* clr ACK pending */ - } - } - else /* ERROR, sequence number NOT expected */ - { - i4b_Dfreembuf(m); /* discard information */ - - if(l2sc->rej_excpt == 1) /* already exception ? */ - { - if(p == 1) /* immediate response ? */ - { - i4b_tx_rr_response(l2sc, p); /* yes, tx RR */ - l2sc->ack_pend = 0; /* clr ack pend */ - } - } - else /* not in exception cond */ - { - l2sc->rej_excpt = 1; /* set exception */ - i4b_tx_rej_response(l2sc, p); /* tx REJ */ - l2sc->ack_pend = 0; /* clr ack pending */ - } - } - } - - /* sequence number ranges as expected ? */ - - if(i4b_l2_nr_ok(nr, l2sc->va, l2sc->vs)) - { - if(l2sc->Q921_state == ST_TIMREC) - { - l2sc->va = nr; - splx(x); - return; - } - - if(l2sc->peer_busy) /* yes, other side busy ? */ - { - l2sc->va = nr; /* yes, update ack count */ - } - else /* other side ready */ - { - if(nr == l2sc->vs) /* count expected ? */ - { - l2sc->va = nr; /* update ack */ - i4b_T200_stop(l2sc); - i4b_T203_restart(l2sc); - } - else - { - if(nr != l2sc->va) - { - l2sc->va = nr; - i4b_T200_restart(l2sc); - } - } - } - } - else - { - i4b_nr_error_recovery(l2sc); /* sequence error */ - l2sc->Q921_state = ST_AW_EST; - } - splx(x); -} - -/*---------------------------------------------------------------------------* - * internal I FRAME QUEUED UP routine (Q.921 03/93 p 61) - *---------------------------------------------------------------------------*/ -void -i4b_i_frame_queued_up(l2_softc_t *l2sc) -{ - int x; - struct mbuf *m; - u_char *ptr; - - x = SPLI4B(); - - if(l2sc->peer_busy) - { - DBGL2(L2_I_MSG, "i4b_i_frame_queued_up", ("peer busy!\n")); - i4b_print_l2var(l2sc); - splx(x); - return; - } - - if(l2sc->vs == ((l2sc->va + MAX_K_VALUE) & 127)) - { - DBGL2(L2_I_ERR, "i4b_i_frame_queued_up", ("V(S) == ((V(A) + k) & 127)!\n")); - DBGL2(L2_I_ERR, "i4b_i_frame_queued_up", ("state = %s\n", i4b_print_l2state(l2sc))); - i4b_print_l2var(l2sc); - splx(x); - return; - } - - IF_DEQUEUE(&l2sc->i_queue, m); /* fetch next frame to tx */ - - if(!m) - { - DBGL2(L2_I_ERR, "i4b_i_frame_queued_up", ("ERROR, mbuf NULL after IF_DEQUEUE\n")); - splx(x); - return; - } - - ptr = m->m_data; - - PUTSAPI(SAPI_CCP, CR_CMD_TO_NT, *(ptr + OFF_SAPI)); - PUTTEI(l2sc->tei, *(ptr + OFF_TEI)); - - *(ptr + OFF_INS) = (l2sc->vs << 1) & 0xfe; /* bit 0 = 0 */ - *(ptr + OFF_INR) = (l2sc->vr << 1) & 0xfe; /* P bit = 0 */ - - PH_Data_Req(l2sc->unit, m, MBUF_DONTFREE); /* free'd when ack'd ! */ - - l2sc->iframe_sent = 1; /* in case we ack an I frame with another I frame */ - - if(l2sc->ua_num != UA_EMPTY) /* failsafe */ - { - DBGL2(L2_I_ERR, "i4b_i_frame_queued_up", ("ERROR, l2sc->ua_num: %d != UA_EMPTY\n", l2sc->ua_num)); - i4b_print_l2var(l2sc); - i4b_Dfreembuf(l2sc->ua_frame); - } - - l2sc->ua_frame = m; /* save unacked frame */ - l2sc->ua_num = l2sc->vs; /* save frame number */ - - M128INC(l2sc->vs); - - l2sc->ack_pend = 0; - - splx(x); - - if(l2sc->T200 == TIMER_IDLE) - { - i4b_T203_stop(l2sc); - i4b_T200_start(l2sc); - } -} - -#endif /* NI4BQ921 > 0 */ |