diff options
Diffstat (limited to 'sys/i4b/layer2/i4b_l2.c')
| -rw-r--r-- | sys/i4b/layer2/i4b_l2.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/sys/i4b/layer2/i4b_l2.c b/sys/i4b/layer2/i4b_l2.c new file mode 100644 index 0000000..5cdc1c7 --- /dev/null +++ b/sys/i4b/layer2/i4b_l2.c @@ -0,0 +1,390 @@ +/* + * 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_l2.c - ISDN layer 2 (Q.921) + * ------------------------------- + * + * $Id: i4b_l2.c,v 1.23 1998/12/05 18:05:08 hm Exp $ + * + * last edit-date: [Sat Dec 5 18:27:00 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/include/i4b_global.h> + +#include <i4b/layer2/i4b_l2.h> +#include <i4b/layer2/i4b_l2fsm.h> + +int i4b_dl_establish_ind(int); +int i4b_dl_establish_cnf(int); +int i4b_dl_release_ind(int); +int i4b_dl_release_cnf(int); +int i4b_dl_data_ind(int, struct mbuf *); +int i4b_dl_unit_data_ind(int, struct mbuf *); + +static int i4b_mdl_command_req(int, int, int); + +/* from layer 2 */ + +extern int i4b_mdl_attach_ind(int, int); +extern int i4b_mdl_status_ind(int, int, int); + +/* this layers debug level */ + +unsigned int i4b_l2_debug = L2_DEBUG_DEFAULT; + +struct i4b_l2l3_func i4b_l2l3_func = { + + /* Layer 2 --> Layer 3 */ + + (int (*)(int)) i4b_dl_establish_ind, + (int (*)(int)) i4b_dl_establish_cnf, + (int (*)(int)) i4b_dl_release_ind, + (int (*)(int)) i4b_dl_release_cnf, + (int (*)(int, struct mbuf *)) i4b_dl_data_ind, + (int (*)(int, struct mbuf *)) i4b_dl_unit_data_ind, + + /* Layer 3 --> Layer 2 */ + + (int (*)(int)) i4b_dl_establish_req, + (int (*)(int)) i4b_dl_release_req, + (int (*)(int, struct mbuf *)) i4b_dl_data_req, + (int (*)(int, struct mbuf *)) i4b_dl_unit_data_req, + + /* Layer 2 --> Layer 3 management */ + + (int (*)(int, int, int)) i4b_mdl_status_ind, + + /* Layer 3 --> Layer 2 management */ + + (int (*)(int, int, int)) i4b_mdl_command_req +}; + +/*---------------------------------------------------------------------------* + * DL_ESTABLISH_REQ from layer 3 + *---------------------------------------------------------------------------*/ +int i4b_dl_establish_req(int unit) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + + DBGL2(L2_PRIM, "DL-ESTABLISH-REQ", ("unit %d\n",unit)); + i4b_l1_activate(l2sc); + i4b_next_l2state(l2sc, EV_DLESTRQ); + return(0); +} + +/*---------------------------------------------------------------------------* + * DL_RELEASE_REQ from layer 3 + *---------------------------------------------------------------------------*/ +int i4b_dl_release_req(int unit) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + + DBGL2(L2_PRIM, "DL-RELEASE-REQ", ("unit %d\n",unit)); + i4b_next_l2state(l2sc, EV_DLRELRQ); + return(0); +} + +/*---------------------------------------------------------------------------* + * DL UNIT DATA REQUEST from Layer 3 + *---------------------------------------------------------------------------*/ +int i4b_dl_unit_data_req(int unit, struct mbuf *m) +{ +#ifdef NOTDEF + DBGL2(L2_PRIM, "DL-UNIT-DATA-REQ", ("unit %d\n",unit)); +#endif + return(0); +} + +/*---------------------------------------------------------------------------* + * DL DATA REQUEST from Layer 3 + *---------------------------------------------------------------------------*/ +int i4b_dl_data_req(int unit, struct mbuf *m) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + int x; +#ifdef NOTDEF + DBGL2(L2_PRIM, "DL-DATA-REQ", ("unit %d\n",unit)); +#endif + switch(l2sc->Q921_state) + { + case ST_AW_EST: + case ST_MULTIFR: + case ST_TIMREC: + + if(IF_QFULL(&l2sc->i_queue)) + { + DBGL2(L2_ERROR, "i4b_dl_data_req", ("i_queue full!!\n")); + i4b_Dfreembuf(m); + } + else + { + x = splimp(); + IF_ENQUEUE(&l2sc->i_queue, m); + splx(x); + i4b_i_frame_queued_up(l2sc); + } + break; + + default: + DBGL2(L2_ERROR, "i4b_dl_data_req", ("unit %d ERROR in state [%s], freeing mbuf\n", unit, i4b_print_l2state(l2sc))); + i4b_Dfreembuf(m); + break; + } + return(0); +} + +/*---------------------------------------------------------------------------* + * i4b_ph_activate_ind - link activation indication from layer 1 + *---------------------------------------------------------------------------*/ +int +i4b_ph_activate_ind(int unit) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + + DBGL1(L1_PRIM, "PH-ACTIVATE-IND", ("unit %d\n",unit)); + l2sc->ph_active = PH_ACTIVE; + return(0); +} + +/*---------------------------------------------------------------------------* + * i4b_ph_deactivate_ind - link deactivation indication from layer 1 + *---------------------------------------------------------------------------*/ +int +i4b_ph_deactivate_ind(int unit) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + + DBGL1(L1_PRIM, "PH-DEACTIVATE-IND", ("unit %d\n",unit)); + l2sc->ph_active = PH_INACTIVE; + return(0); +} + + +/*---------------------------------------------------------------------------* + * i4b_l2_unit_init - place layer 2 unit into known state + *---------------------------------------------------------------------------*/ +static void +i4b_l2_unit_init(int unit) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + + l2sc->Q921_state = ST_TEI_UNAS; + l2sc->tei_valid = TEI_INVALID; + l2sc->vr = 0; + l2sc->vs = 0; + l2sc->va = 0; + l2sc->ack_pend = 0; + l2sc->rej_excpt = 0; + l2sc->peer_busy = 0; + l2sc->own_busy = 0; + l2sc->l3initiated = 0; + + l2sc->rxd_CR = 0; + l2sc->rxd_PF = 0; + l2sc->rxd_NR = 0; + l2sc->RC = 0; + l2sc->iframe_sent = 0; + + l2sc->postfsmfunc = NULL; + + if(l2sc->ua_num != UA_EMPTY) + { + i4b_Dfreembuf(l2sc->ua_frame); + l2sc->ua_num = UA_EMPTY; + l2sc->ua_frame = NULL; + } + + i4b_T200_stop(l2sc); + i4b_T202_stop(l2sc); + i4b_T203_stop(l2sc); +} + +/*---------------------------------------------------------------------------* + * i4b_mph_status_ind - status indication upward + *---------------------------------------------------------------------------*/ +int +i4b_mph_status_ind(int unit, int status, int parm) +{ + l2_softc_t *l2sc = &l2_softc[unit]; + int sendup = 1; + + int x = SPLI4B(); + + DBGL1(L1_PRIM, "MPH-STATUS-IND", ("unit %d, status=%d, parm=%d\n", unit, status, parm)); + + switch(status) + { + case STI_ATTACH: + l2sc->unit = unit; + l2sc->i_queue.ifq_maxlen = IQUEUE_MAXLEN; + l2sc->ua_frame = NULL; + i4b_l2_unit_init(unit); + +#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001 + /* initialize the callout handles for timeout routines */ + callout_handle_init(&l2sc->T200_callout); + callout_handle_init(&l2sc->T202_callout); + callout_handle_init(&l2sc->T203_callout); +#endif + break; + + case STI_L1STAT: /* state of layer 1 */ + break; + + case STI_PDEACT: /* Timer 4 expired */ + if((l2sc->Q921_state >= ST_AW_EST) && + (l2sc->Q921_state <= ST_TIMREC)) + { + DBGL2(L2_ERROR, "i4b_mph_status_ind", ("unit %d, persistent deactivation!\n", unit)); + i4b_l2_unit_init(unit); + } + else + { + sendup = 0; + } + break; + + case STI_NOL1ACC: + i4b_l2_unit_init(unit); + DBGL2(L2_ERROR, "i4b_mph_status_ind", ("unit %d, cannot access S0 bus!\n", unit)); + break; + + default: + DBGL2(L2_ERROR, "i4b_mph_status_ind", ("ERROR, unit %d, unknown status message!\n", unit)); + break; + } + + if(sendup) + MDL_Status_Ind(unit, status, parm); /* send up to layer 3 */ + + splx(x); + + return(0); +} + +/*---------------------------------------------------------------------------* + * MDL_COMMAND_REQ from layer 3 + *---------------------------------------------------------------------------*/ +int i4b_mdl_command_req(int unit, int command, int parm) +{ + DBGL2(L2_PRIM, "MDL-COMMAND-REQ", ("unit %d, command=%d, parm=%d\n", unit, command, parm)); + + switch(command) + { + case CMR_DOPEN: + i4b_l2_unit_init(unit); + break; + } + + MPH_Command_Req(unit, command, parm); + + return(0); +} + +/*---------------------------------------------------------------------------* + * i4b_ph_data_ind - process a rx'd frame got from layer 1 + *---------------------------------------------------------------------------*/ +int +i4b_ph_data_ind(int unit, struct mbuf *m) +{ +#ifdef NOTDEF + DBGL1(L1_PRIM, "PH-DATA-IND", ("unit %d\n", unit)); +#endif + u_char *ptr = m->m_data; + + if ( (*(ptr + OFF_CNTL) & 0x01) == 0 ) + { + if(m->m_len < 4) /* 6 oct - 2 chksum oct */ + { + DBGL2(L2_ERROR, "i4b_ph_data_ind", ("ERROR, I-frame < 6 octetts!\n")); + i4b_Dfreembuf(m); + return(0); + } + i4b_rxd_i_frame(unit, m); + } + else if ( (*(ptr + OFF_CNTL) & 0x03) == 0x01 ) + { + if(m->m_len < 4) /* 6 oct - 2 chksum oct */ + { + DBGL2(L2_ERROR, "i4b_ph_data_ind", ("ERROR, S-frame < 6 octetts!\n")); + i4b_Dfreembuf(m); + return(0); + } + i4b_rxd_s_frame(unit, m); + } + else if ( (*(ptr + OFF_CNTL) & 0x03) == 0x03 ) + { + if(m->m_len < 3) /* 5 oct - 2 chksum oct */ + { + DBGL2(L2_ERROR, "i4b_ph_data_ind", ("ERROR, U-frame < 5 octetts!\n")); + i4b_Dfreembuf(m); + return(0); + } + i4b_rxd_u_frame(unit, m); + } + else + { + DBGL2(L2_ERROR, "i4b_ph_data_ind", ("ERROR, bad frame rx'd - ")); + i4b_print_frame(m->m_len, m->m_data); + i4b_Dfreembuf(m); + } + return(0); +} + +#endif /* NI4BQ921 > 0 */ + |
