478 lines
9.0 KiB
C
478 lines
9.0 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* SPANS Signalling Manager
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* ---------------------------
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*
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* SPANS-related utility routines.
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*
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*/
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#include <netatm/kern_include.h>
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#include "spans_xdr.h"
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#include <netatm/spans/spans_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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#ifdef NOTDEF
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/* XXX -- Remove all SAP checks? */
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#define MAX_SAP_ENT 1
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static struct {
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spans_sap spans_sap;
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Sap_t local_sap;
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} sap_table[MAX_SAP_ENT] = {
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{SPANS_SAP_IP, SAP_IP},
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};
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/*
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* Translate an internal SAP to a SPANS SAP
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*
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* Search the SAP table for the given SAP. Put the corresponding SPANS
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* SAP into the indicated variable.
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*
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* Arguments:
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* lsap the value of the internal SAP
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* ssap a pointer to the variable to receive the SPANS SAP value
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*
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* Returns:
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* TRUE the SAP was found; *ssap is valid
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* FALSE the SAP was not found; *ssap is not valid
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*
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*/
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int
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spans_get_spans_sap(lsap, ssap)
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Sap_t lsap;
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spans_sap *ssap;
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{
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int i;
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/*
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* Search the SAP table for the given local SAP
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*/
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for (i=0; i< MAX_SAP_ENT; i++) {
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if (sap_table[i].local_sap == lsap) {
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*ssap = sap_table[i].spans_sap;
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return(TRUE);
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}
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}
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return(FALSE);
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}
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/*
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* Translate a SPANS SAP to internal format
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*
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* Search the SAP table for the given SAP. Put the corresponding
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* internal SAP into the indicated variable.
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*
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* Arguments:
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* ssap the value of the SPANS SAP
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* lsap a pointer to the variable to receive the internal
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* SAP value
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*
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* Returns:
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* TRUE the SAP was found; *lsap is valid
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* FALSE the SAP was not found; *lsap is not valid
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*
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*/
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int
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spans_get_local_sap(ssap, lsap)
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spans_sap ssap;
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Sap_t *lsap;
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{
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int i;
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/*
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* Search the SAP table for the given SPANS SAP
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*/
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for (i=0; i< MAX_SAP_ENT; i++) {
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if (sap_table[i].spans_sap == ssap) {
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*lsap = sap_table[i].local_sap;
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return(TRUE);
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}
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}
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return(FALSE);
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}
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#endif
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/*
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* Allocate an ephemeral SPANS SAP
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*
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* Arguments:
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* spp pointer to SPANS protocol instance
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*
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* Returns:
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* a SPANS ephemeral SAP number
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*
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*/
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int
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spans_ephemeral_sap(spp)
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struct spans *spp;
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{
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return(SPANS_SAP_EPHEMERAL);
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}
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/*
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* Translate an internal AAL designator to a SPANS AAL type
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*
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* Arguments:
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* laal internal AAL designation
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* saal a pointer to the variable to receive the SPANS AAL type
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*
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* Returns:
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* TRUE the AAL was found; *saal is valid
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* FALSE the AAL was not found; *saal is not valid
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*
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*/
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int
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spans_get_spans_aal(laal, saal)
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Aal_t laal;
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spans_aal *saal;
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{
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/*
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*
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*/
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switch (laal) {
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case ATM_AAL0:
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*saal = SPANS_AAL0;
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return(TRUE);
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case ATM_AAL1:
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*saal = SPANS_AAL1;
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return(TRUE);
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case ATM_AAL2:
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*saal = SPANS_AAL2;
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return(TRUE);
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case ATM_AAL3_4:
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*saal = SPANS_AAL4;
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return(TRUE);
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case ATM_AAL5:
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*saal = SPANS_AAL5;
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return(TRUE);
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default:
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return(FALSE);
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}
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}
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/*
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* Translate a SPANS AAL type to an internal AAL designator
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*
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* Arguments:
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* saal the SPANS AAL type
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* laal a pointer to the variable to receive the internal
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* AAL designation
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*
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* Returns:
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* TRUE the AAL was found; *laal is valid
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* FALSE the AAL was not found; *laal is not valid
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*
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*/
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int
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spans_get_local_aal(saal, laal)
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spans_aal saal;
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Aal_t *laal;
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{
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/*
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*
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*/
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switch (saal) {
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case SPANS_AAL0:
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*laal = ATM_AAL0;
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return(TRUE);
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case SPANS_AAL1:
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*laal = ATM_AAL1;
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return(TRUE);
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case SPANS_AAL2:
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*laal = ATM_AAL2;
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return(TRUE);
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case SPANS_AAL3:
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case SPANS_AAL4:
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*laal = ATM_AAL3_4;
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return(TRUE);
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case SPANS_AAL5:
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*laal = ATM_AAL5;
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return(TRUE);
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default:
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return(FALSE);
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}
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}
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/*
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* Verify a VCCB
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*
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* Search SPANS's VCCB queue to verify that a VCCB belongs to SPANS.
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*
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* Arguments:
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* spp pointer to SPANS protocol instance
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* svp pointer to a VCCB
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*
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* Returns:
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* TRUE the VCCB belongs to SPANS
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* FALSE the VCCB doesn't belong to SPANS
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*
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*/
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int
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spans_verify_vccb(spp, svp)
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struct spans *spp;
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struct spans_vccb *svp;
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{
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struct spans_vccb *vcp, *vcnext;
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for (vcp = Q_HEAD(spp->sp_vccq, struct spans_vccb);
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vcp; vcp = vcnext){
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vcnext = Q_NEXT(vcp, struct spans_vccb, sv_sigelem);
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if (svp == vcp) {
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return(TRUE);
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}
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}
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return(FALSE);
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}
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/*
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* Find a VCCB
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*
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* Find a VCCB given the VPI and VCI.
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*
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* Arguments:
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* spp pointer to SPANS protocol instance
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* vpi the VPI to search for
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* vci the VCI to search for
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* dir the direction of the VCC (VCC_IN, VCC_OUT, or both).
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* If dir is set to zero, return the address of any VCCB
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* with the given VPI/VCI, regardless of direction.
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*
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* Returns:
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* 0 there is no such VCCB
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* address the address of the VCCB
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*
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*/
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struct spans_vccb *
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spans_find_vpvc(spp, vpi, vci, dir)
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struct spans *spp;
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int vpi, vci;
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u_char dir;
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{
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struct spans_vccb *svp, *svnext;
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for (svp = Q_HEAD(spp->sp_vccq, struct spans_vccb); svp;
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svp = svnext){
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svnext = Q_NEXT(svp, struct spans_vccb, sv_sigelem);
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if (svp->sv_vpi == vpi &&
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svp->sv_vci == vci &&
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(svp->sv_type & dir) == dir)
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break;
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}
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return(svp);
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}
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/*
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* Find a connection
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*
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* Find a VCCB given the connection structure.
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*
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* Arguments:
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* spp pointer to SPANS protocol instance
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* p pointer to an spans_atm_conn structure
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*
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* Returns:
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* 0 there is no such VCCB
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* address the address of the VCCB
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*
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*/
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struct spans_vccb *
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spans_find_conn(spp, p)
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struct spans *spp;
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struct spans_atm_conn *p;
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{
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struct spans_vccb *svp, *svnext;
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for (svp = Q_HEAD(spp->sp_vccq, struct spans_vccb); svp; svp = svnext){
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svnext = Q_NEXT(svp, struct spans_vccb, sv_sigelem);
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if (!bcmp(p, &svp->sv_conn, sizeof (spans_atm_conn)))
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break;
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}
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return(svp);
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}
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/*
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* Allocate a VPI/VCI pair
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*
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* When we get an open request or indication from the network, we have
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* allocate a VPI and VCI for the conection. This routine will allocate
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* a VPI/VCI based on the next available VCI in the SPANS protocol block.
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* The VPI/VCI chose must be within the range allowed by the interface and
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* must not already be in use.
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*
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* Currently the Fore ATM interface only supports VPI 0, so this code only
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* allocates a VCI.
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*
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* There's probably a more elegant way to do this.
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*
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* Arguments:
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* spp pointer to connection's SPANS protocol instance
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*
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* Returns:
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* 0 no VPI/VCI available
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* vpvc the VPI/VCI for the connection
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*
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*/
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spans_vpvc
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spans_alloc_vpvc(spp)
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struct spans *spp;
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{
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int vpi, vci;
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/*
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* Loop through the allowable VCIs, starting with the curent one,
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* to find one that's not in use.
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*/
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while (spp->sp_alloc_vci <= spp->sp_max_vci) {
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vpi = spp->sp_alloc_vpi;
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vci = spp->sp_alloc_vci++;
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if (!spans_find_vpvc(spp, vpi, vci, 0)) {
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return(SPANS_PACK_VPIVCI(vpi, vci));
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}
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}
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/*
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* Reset the VCI to the minimum
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*/
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spp->sp_alloc_vci = spp->sp_min_vci;
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/*
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* Try looping through again
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*/
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while (spp->sp_alloc_vci <= spp->sp_max_vci) {
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vpi = spp->sp_alloc_vpi;
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vci = spp->sp_alloc_vci++;
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if (!spans_find_vpvc(spp, vpi, vci, 0)) {
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return(SPANS_PACK_VPIVCI(vpi, vci));
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}
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}
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/*
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* All allowable VCIs are in use
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*/
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return(0);
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}
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/*
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* Print a SPANS address
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*
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* Convert a SPANS address into an ASCII string suitable for printing.
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*
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* Arguments:
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* p pointer to a struct spans_addr
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*
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* Returns:
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* the address of a string with the ASCII representation of the
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* address.
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*
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*/
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char *
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spans_addr_print(p)
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struct spans_addr *p;
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{
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static char strbuff[80];
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union {
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int w;
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char c[4];
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} u1, u2;
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/*
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* Clear the returned string
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*/
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KM_ZERO(strbuff, sizeof(strbuff));
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/*
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* Get address into integers
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*/
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u1.c[0] =p->addr[0];
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u1.c[1] =p->addr[1];
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u1.c[2] =p->addr[2];
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u1.c[3] =p->addr[3];
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u2.c[0] =p->addr[4];
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u2.c[1] =p->addr[5];
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u2.c[2] =p->addr[6];
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u2.c[3] =p->addr[7];
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/*
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* Print and return the string
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*/
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sprintf(strbuff, "%lx.%lx", (u_long)ntohl(u1.w), (u_long)ntohl(u2.w));
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return(strbuff);
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}
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/*
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* Print a buffer chain
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*
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* Arguments:
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* m pointer to a buffer chain
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*
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* Returns:
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* none
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*
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*/
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void
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spans_dump_buffer(m)
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KBuffer *m;
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{
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int i;
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caddr_t cp;
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printf("spans_dump_buffer:\n");
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while (m) {
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KB_DATASTART(m, cp, caddr_t);
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for (i = 0; i < KB_LEN(m); i++) {
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if (i == 0)
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printf(" bfr=%p: ", m);
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printf("%x ", (u_char)*cp++);
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}
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printf("<end_bfr>\n");
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m = KB_NEXT(m);
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}
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}
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