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/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $FreeBSD$
*
*/
/*
* PVC-only Signalling Manager
* ---------------------------
*
* Subroutines
*
*/
#include <netatm/kern_include.h>
#include <netatm/sigpvc/sigpvc_var.h>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
extern struct sp_info sigpvc_vcpool;
/*
* Create a SigPVC Permanent Virtual Channel
*
* This function will construct a vccb for a "sigpvc-controlled" PVC
* and create the service stack requested by the user.
*
* Must be called at splnet.
*
* Arguments:
* pvp pointer to sigpvc protocol instance
* cvp pointer to CM's connection VCC
* errp location to store an error code if CALL_FAILED is returned
*
* Returns:
* CALL_FAILED - pvc creation failed
* CALL_CONNECTED - pvc has been successfully created
*
*/
int
sigpvc_create_pvc(pvp, cvp, errp)
struct sigpvc *pvp;
Atm_connvc *cvp;
int *errp;
{
Atm_addr_pvc *pp;
struct vccb *vcp;
u_int vpi, vci;
pp = (Atm_addr_pvc *)cvp->cvc_attr.called.addr.address;
vpi = ATM_PVC_GET_VPI(pp);
vci = ATM_PVC_GET_VCI(pp);
/*
* Verify requested VPI,VCI
*/
if ((vpi > pvp->pv_pif->pif_maxvpi) ||
(vci == 0) || (vci > pvp->pv_pif->pif_maxvci)) {
*errp = ERANGE;
return (CALL_FAILED);
}
for (vcp = Q_HEAD(pvp->pv_vccq, struct vccb); vcp;
vcp = Q_NEXT(vcp, struct vccb, vc_sigelem)) {
if ((vcp->vc_vpi == vpi) &&
(vcp->vc_vci == vci)) {
*errp = EADDRINUSE;
return (CALL_FAILED);
}
}
/*
* Verify network interface
*/
if (cvp->cvc_attr.nif) {
if (cvp->cvc_attr.nif->nif_pif != pvp->pv_pif) {
*errp = EINVAL;
return (CALL_FAILED);
}
}
/*
* Allocate control block for PVC
*/
vcp = (struct vccb *)atm_allocate(&sigpvc_vcpool);
if (vcp == NULL) {
*errp = ENOMEM;
return (CALL_FAILED);
}
/*
* Fill in VCCB
*/
vcp->vc_type = VCC_PVC | VCC_IN | VCC_OUT;
vcp->vc_proto = ATM_SIG_PVC;
vcp->vc_sstate = VCCS_ACTIVE;
vcp->vc_ustate = VCCU_OPEN;
vcp->vc_pif = pvp->pv_pif;
vcp->vc_nif = cvp->cvc_attr.nif;
vcp->vc_vpi = vpi;
vcp->vc_vci = vci;
vcp->vc_connvc = cvp;
/*
* Put VCCB on sigpvc queue
*/
ENQUEUE(vcp, struct vccb, vc_sigelem, pvp->pv_vccq);
/*
* Pass back VCCB to connection manager
*/
cvp->cvc_vcc = vcp;
/*
* PVC is ready to go!
*/
return (CALL_CONNECTED);
}
/*
* Close a SigPVC VCC
*
* Clean up vccb, note that it's closing and wait for its freeing.
*
* Arguments:
* vcp pointer to connection's VCC control block
*
* Returns:
* none
*
*/
void
sigpvc_close_vcc(vcp)
struct vccb *vcp;
{
/*
* Sanity check (actually design-flaw check)
*/
if (vcp->vc_connvc->cvc_upcnt || vcp->vc_connvc->cvc_downcnt)
panic("sigpvc_close_vcc: stack call");
/*
* Set state variables
*/
vcp->vc_ustate = VCCU_CLOSED;
vcp->vc_sstate = VCCS_FREE;
/*
* Wait for user to free resources
*/
}
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