430 строки
10 KiB
C
430 строки
10 KiB
C
/******************************************************************************
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*
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* (C)Copyright 1998,1999 SysKonnect,
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* a business unit of Schneider & Koch & Co. Datensysteme GmbH.
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*
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* See the file "skfddi.c" for further information.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The information in this file is provided "AS IS" without warranty.
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*
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******************************************************************************/
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/*
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SMT 7.2 Status Response Frame Implementation
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SRF state machine and frame generation
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*/
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#include "h/types.h"
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#include "h/fddi.h"
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#include "h/smc.h"
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#include "h/smt_p.h"
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#define KERNEL
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#include "h/smtstate.h"
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#ifndef SLIM_SMT
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#ifndef BOOT
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#ifndef lint
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static const char ID_sccs[] = "@(#)srf.c 1.18 97/08/04 (C) SK " ;
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#endif
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/*
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* function declarations
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*/
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static void clear_all_rep(struct s_smc *smc);
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static void clear_reported(struct s_smc *smc);
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static void smt_send_srf(struct s_smc *smc);
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static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index);
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#define MAX_EVCS ARRAY_SIZE(smc->evcs)
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struct evc_init {
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u_char code ;
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u_char index ;
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u_char n ;
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u_short para ;
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} ;
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static const struct evc_init evc_inits[] = {
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{ SMT_COND_SMT_PEER_WRAP, 0,1,SMT_P1048 } ,
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{ SMT_COND_MAC_DUP_ADDR, INDEX_MAC, NUMMACS,SMT_P208C } ,
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{ SMT_COND_MAC_FRAME_ERROR, INDEX_MAC, NUMMACS,SMT_P208D } ,
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{ SMT_COND_MAC_NOT_COPIED, INDEX_MAC, NUMMACS,SMT_P208E } ,
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{ SMT_EVENT_MAC_NEIGHBOR_CHANGE, INDEX_MAC, NUMMACS,SMT_P208F } ,
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{ SMT_EVENT_MAC_PATH_CHANGE, INDEX_MAC, NUMMACS,SMT_P2090 } ,
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{ SMT_COND_PORT_LER, INDEX_PORT,NUMPHYS,SMT_P4050 } ,
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{ SMT_COND_PORT_EB_ERROR, INDEX_PORT,NUMPHYS,SMT_P4052 } ,
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{ SMT_EVENT_PORT_CONNECTION, INDEX_PORT,NUMPHYS,SMT_P4051 } ,
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{ SMT_EVENT_PORT_PATH_CHANGE, INDEX_PORT,NUMPHYS,SMT_P4053 } ,
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} ;
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#define MAX_INIT_EVC ARRAY_SIZE(evc_inits)
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void smt_init_evc(struct s_smc *smc)
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{
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struct s_srf_evc *evc ;
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const struct evc_init *init ;
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int i ;
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int index ;
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int offset ;
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static u_char fail_safe = FALSE ;
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memset((char *)smc->evcs,0,sizeof(smc->evcs)) ;
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evc = smc->evcs ;
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init = evc_inits ;
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for (i = 0 ; (unsigned) i < MAX_INIT_EVC ; i++) {
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for (index = 0 ; index < init->n ; index++) {
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evc->evc_code = init->code ;
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evc->evc_para = init->para ;
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evc->evc_index = init->index + index ;
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#ifndef DEBUG
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evc->evc_multiple = &fail_safe ;
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evc->evc_cond_state = &fail_safe ;
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#endif
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evc++ ;
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}
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init++ ;
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}
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if ((unsigned) (evc - smc->evcs) > MAX_EVCS) {
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SMT_PANIC(smc,SMT_E0127, SMT_E0127_MSG) ;
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}
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/*
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* conditions
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*/
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smc->evcs[0].evc_cond_state = &smc->mib.fddiSMTPeerWrapFlag ;
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smc->evcs[1].evc_cond_state =
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&smc->mib.m[MAC0].fddiMACDuplicateAddressCond ;
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smc->evcs[2].evc_cond_state =
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&smc->mib.m[MAC0].fddiMACFrameErrorFlag ;
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smc->evcs[3].evc_cond_state =
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&smc->mib.m[MAC0].fddiMACNotCopiedFlag ;
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/*
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* events
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*/
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smc->evcs[4].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_N ;
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smc->evcs[5].evc_multiple = &smc->mib.m[MAC0].fddiMACMultiple_P ;
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offset = 6 ;
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for (i = 0 ; i < NUMPHYS ; i++) {
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/*
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* conditions
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*/
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smc->evcs[offset + 0*NUMPHYS].evc_cond_state =
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&smc->mib.p[i].fddiPORTLerFlag ;
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smc->evcs[offset + 1*NUMPHYS].evc_cond_state =
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&smc->mib.p[i].fddiPORTEB_Condition ;
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/*
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* events
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*/
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smc->evcs[offset + 2*NUMPHYS].evc_multiple =
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&smc->mib.p[i].fddiPORTMultiple_U ;
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smc->evcs[offset + 3*NUMPHYS].evc_multiple =
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&smc->mib.p[i].fddiPORTMultiple_P ;
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offset++ ;
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}
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#ifdef DEBUG
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for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
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if (SMT_IS_CONDITION(evc->evc_code)) {
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if (!evc->evc_cond_state) {
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SMT_PANIC(smc,SMT_E0128, SMT_E0128_MSG) ;
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}
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evc->evc_multiple = &fail_safe ;
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}
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else {
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if (!evc->evc_multiple) {
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SMT_PANIC(smc,SMT_E0129, SMT_E0129_MSG) ;
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}
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evc->evc_cond_state = &fail_safe ;
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}
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}
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#endif
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smc->srf.TSR = smt_get_time() ;
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smc->srf.sr_state = SR0_WAIT ;
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}
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static struct s_srf_evc *smt_get_evc(struct s_smc *smc, int code, int index)
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{
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int i ;
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struct s_srf_evc *evc ;
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for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
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if (evc->evc_code == code && evc->evc_index == index)
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return evc;
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}
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return NULL;
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}
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#define THRESHOLD_2 (2*TICKS_PER_SECOND)
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#define THRESHOLD_32 (32*TICKS_PER_SECOND)
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#ifdef DEBUG
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static const char * const srf_names[] = {
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"None","MACPathChangeEvent", "MACNeighborChangeEvent",
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"PORTPathChangeEvent", "PORTUndesiredConnectionAttemptEvent",
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"SMTPeerWrapCondition", "SMTHoldCondition",
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"MACFrameErrorCondition", "MACDuplicateAddressCondition",
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"MACNotCopiedCondition", "PORTEBErrorCondition",
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"PORTLerCondition"
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} ;
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#endif
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void smt_srf_event(struct s_smc *smc, int code, int index, int cond)
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{
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struct s_srf_evc *evc ;
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int cond_asserted = 0 ;
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int cond_deasserted = 0 ;
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int event_occurred = 0 ;
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int tsr ;
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int T_Limit = 2*TICKS_PER_SECOND ;
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if (code == SMT_COND_MAC_DUP_ADDR && cond) {
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RS_SET(smc,RS_DUPADDR) ;
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}
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if (code) {
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DB_SMT("SRF: %s index %d\n",srf_names[code],index) ;
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if (!(evc = smt_get_evc(smc,code,index))) {
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DB_SMT("SRF : smt_get_evc() failed\n",0,0) ;
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return ;
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}
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/*
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* ignore condition if no change
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*/
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if (SMT_IS_CONDITION(code)) {
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if (*evc->evc_cond_state == cond)
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return ;
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}
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/*
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* set transition time stamp
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*/
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smt_set_timestamp(smc,smc->mib.fddiSMTTransitionTimeStamp) ;
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if (SMT_IS_CONDITION(code)) {
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DB_SMT("SRF: condition is %s\n",cond ? "ON":"OFF",0) ;
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if (cond) {
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*evc->evc_cond_state = TRUE ;
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evc->evc_rep_required = TRUE ;
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smc->srf.any_report = TRUE ;
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cond_asserted = TRUE ;
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}
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else {
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*evc->evc_cond_state = FALSE ;
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cond_deasserted = TRUE ;
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}
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}
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else {
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if (evc->evc_rep_required) {
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*evc->evc_multiple = TRUE ;
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}
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else {
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evc->evc_rep_required = TRUE ;
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*evc->evc_multiple = FALSE ;
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}
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smc->srf.any_report = TRUE ;
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event_occurred = TRUE ;
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}
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#ifdef FDDI_MIB
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snmp_srf_event(smc,evc) ;
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#endif /* FDDI_MIB */
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}
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tsr = smt_get_time() - smc->srf.TSR ;
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switch (smc->srf.sr_state) {
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case SR0_WAIT :
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/* SR01a */
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if (cond_asserted && tsr < T_Limit) {
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smc->srf.SRThreshold = THRESHOLD_2 ;
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smc->srf.sr_state = SR1_HOLDOFF ;
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break ;
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}
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/* SR01b */
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if (cond_deasserted && tsr < T_Limit) {
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smc->srf.sr_state = SR1_HOLDOFF ;
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break ;
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}
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/* SR01c */
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if (event_occurred && tsr < T_Limit) {
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smc->srf.sr_state = SR1_HOLDOFF ;
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break ;
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}
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/* SR00b */
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if (cond_asserted && tsr >= T_Limit) {
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smc->srf.SRThreshold = THRESHOLD_2 ;
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smc->srf.TSR = smt_get_time() ;
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smt_send_srf(smc) ;
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break ;
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}
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/* SR00c */
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if (cond_deasserted && tsr >= T_Limit) {
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smc->srf.TSR = smt_get_time() ;
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smt_send_srf(smc) ;
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break ;
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}
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/* SR00d */
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if (event_occurred && tsr >= T_Limit) {
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smc->srf.TSR = smt_get_time() ;
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smt_send_srf(smc) ;
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break ;
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}
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/* SR00e */
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if (smc->srf.any_report && (u_long) tsr >=
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smc->srf.SRThreshold) {
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smc->srf.SRThreshold *= 2 ;
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if (smc->srf.SRThreshold > THRESHOLD_32)
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smc->srf.SRThreshold = THRESHOLD_32 ;
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smc->srf.TSR = smt_get_time() ;
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smt_send_srf(smc) ;
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break ;
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}
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/* SR02 */
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if (!smc->mib.fddiSMTStatRptPolicy) {
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smc->srf.sr_state = SR2_DISABLED ;
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break ;
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}
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break ;
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case SR1_HOLDOFF :
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/* SR10b */
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if (tsr >= T_Limit) {
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smc->srf.sr_state = SR0_WAIT ;
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smc->srf.TSR = smt_get_time() ;
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smt_send_srf(smc) ;
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break ;
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}
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/* SR11a */
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if (cond_asserted) {
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smc->srf.SRThreshold = THRESHOLD_2 ;
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}
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/* SR11b */
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/* SR11c */
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/* handled above */
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/* SR12 */
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if (!smc->mib.fddiSMTStatRptPolicy) {
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smc->srf.sr_state = SR2_DISABLED ;
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break ;
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}
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break ;
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case SR2_DISABLED :
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if (smc->mib.fddiSMTStatRptPolicy) {
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smc->srf.sr_state = SR0_WAIT ;
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smc->srf.TSR = smt_get_time() ;
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smc->srf.SRThreshold = THRESHOLD_2 ;
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clear_all_rep(smc) ;
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break ;
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}
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break ;
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}
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}
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static void clear_all_rep(struct s_smc *smc)
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{
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struct s_srf_evc *evc ;
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int i ;
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for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
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evc->evc_rep_required = FALSE ;
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if (SMT_IS_CONDITION(evc->evc_code))
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*evc->evc_cond_state = FALSE ;
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}
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smc->srf.any_report = FALSE ;
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}
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static void clear_reported(struct s_smc *smc)
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{
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struct s_srf_evc *evc ;
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int i ;
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smc->srf.any_report = FALSE ;
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for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
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if (SMT_IS_CONDITION(evc->evc_code)) {
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if (*evc->evc_cond_state == FALSE)
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evc->evc_rep_required = FALSE ;
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else
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smc->srf.any_report = TRUE ;
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}
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else {
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evc->evc_rep_required = FALSE ;
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*evc->evc_multiple = FALSE ;
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}
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}
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}
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/*
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* build and send SMT SRF frame
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*/
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static void smt_send_srf(struct s_smc *smc)
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{
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struct smt_header *smt ;
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struct s_srf_evc *evc ;
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SK_LOC_DECL(struct s_pcon,pcon) ;
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SMbuf *mb ;
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int i ;
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static const struct fddi_addr SMT_SRF_DA = {
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{ 0x80, 0x01, 0x43, 0x00, 0x80, 0x08 }
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} ;
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/*
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* build SMT header
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*/
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if (!smc->r.sm_ma_avail)
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return ;
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if (!(mb = smt_build_frame(smc,SMT_SRF,SMT_ANNOUNCE,0)))
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return ;
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RS_SET(smc,RS_SOFTERROR) ;
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smt = smtod(mb, struct smt_header *) ;
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smt->smt_dest = SMT_SRF_DA ; /* DA == SRF multicast */
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/*
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* setup parameter status
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*/
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pcon.pc_len = SMT_MAX_INFO_LEN ; /* max para length */
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pcon.pc_err = 0 ; /* no error */
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pcon.pc_badset = 0 ; /* no bad set count */
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pcon.pc_p = (void *) (smt + 1) ; /* paras start here */
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smt_add_para(smc,&pcon,(u_short) SMT_P1033,0,0) ;
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smt_add_para(smc,&pcon,(u_short) SMT_P1034,0,0) ;
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for (i = 0, evc = smc->evcs ; (unsigned) i < MAX_EVCS ; i++, evc++) {
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if (evc->evc_rep_required) {
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smt_add_para(smc,&pcon,evc->evc_para,
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(int)evc->evc_index,0) ;
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}
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}
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smt->smt_len = SMT_MAX_INFO_LEN - pcon.pc_len ;
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mb->sm_len = smt->smt_len + sizeof(struct smt_header) ;
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DB_SMT("SRF: sending SRF at %x, len %d\n",smt,mb->sm_len) ;
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DB_SMT("SRF: state SR%d Threshold %d\n",
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smc->srf.sr_state,smc->srf.SRThreshold/TICKS_PER_SECOND) ;
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#ifdef DEBUG
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dump_smt(smc,smt,"SRF Send") ;
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#endif
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smt_send_frame(smc,mb,FC_SMT_INFO,0) ;
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clear_reported(smc) ;
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}
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#endif /* no BOOT */
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#endif /* no SLIM_SMT */
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