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894 lines
18 KiB
C
894 lines
18 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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* PVC-only Signalling Manager
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* ---------------------------
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*
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* External interfaces to SigPVC manager. Includes support for
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* running as a loadable kernel module.
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*
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*/
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#ifndef ATM_SIGPVC_MODULE
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#include "opt_atm.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/syslog.h>
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#include <net/if.h>
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#include <netatm/port.h>
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#include <netatm/queue.h>
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#include <netatm/atm.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_sap.h>
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#include <netatm/atm_cm.h>
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#include <netatm/atm_if.h>
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#include <netatm/atm_vc.h>
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#include <netatm/atm_ioctl.h>
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#include <netatm/atm_sigmgr.h>
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#include <netatm/atm_stack.h>
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#include <netatm/atm_pcb.h>
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#include <netatm/atm_var.h>
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#include <netatm/sigpvc/sigpvc_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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/*
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* Global variables
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*/
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struct sp_info sigpvc_vcpool = {
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"sigpvc vcc pool", /* si_name */
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sizeof(struct sigpvc_vccb), /* si_blksiz */
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10, /* si_blkcnt */
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50 /* si_maxallow */
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};
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/*
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* Local functions
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*/
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static int sigpvc_start __P((void));
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static int sigpvc_stop __P((void));
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static int sigpvc_attach __P((struct sigmgr *, struct atm_pif *));
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static int sigpvc_detach __P((struct atm_pif *));
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static int sigpvc_setup __P((Atm_connvc *, int *));
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static int sigpvc_release __P((struct vccb *, int *));
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static int sigpvc_free __P((struct vccb *));
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static int sigpvc_ioctl __P((int, caddr_t, caddr_t));
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/*
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* Local variables
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*/
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static int sigpvc_registered = 0;
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static struct sigmgr sigpvc_mgr = {
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NULL,
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ATM_SIG_PVC,
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NULL,
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sigpvc_attach,
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sigpvc_detach,
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sigpvc_setup,
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NULL,
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NULL,
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sigpvc_release,
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sigpvc_free,
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sigpvc_ioctl
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};
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static struct attr_cause sigpvc_cause = {
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T_ATM_PRESENT,
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{
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T_ATM_ITU_CODING,
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T_ATM_LOC_USER,
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T_ATM_CAUSE_UNSPECIFIED_NORMAL,
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{0, 0, 0, 0}
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}
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};
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/*
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* Initialize sigpvc processing
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*
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* This will be called during module loading. We'll just register
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* the sigpvc protocol descriptor and wait for a SigPVC ATM interface
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* to come online.
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*
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* Arguments:
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* none
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*
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* Returns:
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* 0 startup was successful
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* errno startup failed - reason indicated
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*
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*/
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static int
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sigpvc_start()
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{
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int err = 0;
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/*
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* Verify software version
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*/
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if (atm_version != ATM_VERSION) {
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log(LOG_ERR, "version mismatch: sigpvc=%d.%d kernel=%d.%d\n",
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ATM_VERS_MAJ(ATM_VERSION), ATM_VERS_MIN(ATM_VERSION),
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ATM_VERS_MAJ(atm_version), ATM_VERS_MIN(atm_version));
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return (EINVAL);
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}
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/*
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* Register ourselves with system
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*/
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err = atm_sigmgr_register(&sigpvc_mgr);
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if (err == 0)
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sigpvc_registered = 1;
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return (err);
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}
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/*
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* Halt sigpvc processing
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*
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* This should be called just prior to unloading the module from
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* memory. All sigpvc interfaces must be deregistered before the
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* protocol can be shutdown.
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*
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* Arguments:
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* none
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*
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* Returns:
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* 0 shutdown was successful
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* errno shutdown failed - reason indicated
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*
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*/
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static int
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sigpvc_stop()
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{
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int err = 0;
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int s = splnet();
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/*
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* Is protocol even setup?
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*/
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if (sigpvc_registered) {
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/*
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* Any protocol instances still registered??
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*/
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if (sigpvc_mgr.sm_prinst) {
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/* Yes, can't stop now */
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err = EBUSY;
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goto done;
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}
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/*
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* De-register from system
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*/
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err = atm_sigmgr_deregister(&sigpvc_mgr);
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sigpvc_registered = 0;
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/*
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* Free up our vccb storage pool
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*/
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atm_release_pool(&sigpvc_vcpool);
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} else
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err = ENXIO;
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done:
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(void) splx(s);
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return (err);
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}
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/*
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* Attach a SigPVC-controlled interface
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*
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* Each ATM physical interface must be attached with the signalling manager for
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* the interface's signalling protocol (via the atm_sigmgr_attach function).
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* This function will handle the attachment for SigPVC-controlled interfaces.
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* A new sigpvc protocol instance will be created and then we'll just sit
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* around waiting for connection requests.
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*
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* Function must be called at splnet.
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*
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* Arguments:
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* smp pointer to sigpvc signalling manager control block
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* pip pointer to atm physical interface control block
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*
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* Returns:
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* 0 attach successful
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* errno attach failed - reason indicated
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*
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*/
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static int
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sigpvc_attach(smp, pip)
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struct sigmgr *smp;
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struct atm_pif *pip;
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{
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int err = 0;
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struct sigpvc *pvp = NULL;
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/*
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* Allocate sigpvc protocol instance control block
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*/
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pvp = (struct sigpvc *)
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KM_ALLOC(sizeof(struct sigpvc), M_DEVBUF, M_NOWAIT);
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if (pvp == NULL) {
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err = ENOMEM;
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goto done;
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}
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KM_ZERO(pvp, sizeof(struct sigpvc));
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/*
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* Link instance into manager's chain
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*/
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LINK2TAIL((struct siginst *)pvp, struct siginst,
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smp->sm_prinst, si_next);
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/*
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* Finally, set state and link in interface
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*/
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pvp->pv_pif = pip;
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pvp->pv_state = SIGPVC_ACTIVE;
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pip->pif_sigmgr = smp;
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pip->pif_siginst = (struct siginst *)pvp;
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done:
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/*
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* Reset our work if attach fails
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*/
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if (err) {
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pip->pif_sigmgr = NULL;
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pip->pif_siginst = NULL;
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if (pvp) {
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UNLINK((struct siginst *)pvp, struct siginst,
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smp->sm_prinst, si_next);
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KM_FREE(pvp, sizeof(struct sigpvc), M_DEVBUF);
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}
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}
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return (err);
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}
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/*
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* Detach a SigPVC-controlled interface
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*
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* Each ATM physical interface may be detached from its signalling manager
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* (via the atm_sigmgr_detach function). This function will handle the
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* detachment for all SigPVC-controlled interfaces. All circuits will be
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* immediately terminated.
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*
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* Function must be called at splnet.
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*
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* Arguments:
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* pip pointer to atm physical interface control block
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*
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* Returns:
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* 0 detach successful
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* errno detach failed - reason indicated
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*
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*/
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static int
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sigpvc_detach(pip)
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struct atm_pif *pip;
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{
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struct sigpvc *pvp;
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struct vccb *vcp, *vnext;
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/*
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* Get SigPVC protocol instance
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*/
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pvp = (struct sigpvc *)pip->pif_siginst;
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/*
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* Terminate all of our VCCs
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*/
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for (vcp = Q_HEAD(pvp->pv_vccq, struct vccb); vcp; vcp = vnext){
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u_char oustate;
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vnext = Q_NEXT(vcp, struct vccb, vc_sigelem);
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/*
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* Close VCC and notify owner
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*/
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oustate = vcp->vc_ustate;
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sigpvc_close_vcc(vcp);
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if (oustate == VCCU_OPEN) {
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vcp->vc_connvc->cvc_attr.cause = sigpvc_cause;
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atm_cm_cleared(vcp->vc_connvc);
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}
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}
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/*
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* If there are no vcc's queued, then get rid of the protocol
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* instance.
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*/
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if (Q_HEAD(pvp->pv_vccq, struct vccb) == NULL) {
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struct sigmgr *smp = pip->pif_sigmgr;
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pip->pif_sigmgr = NULL;
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pip->pif_siginst = NULL;
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UNLINK((struct siginst *)pvp, struct siginst, smp->sm_prinst,
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si_next);
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KM_FREE(pvp, sizeof(struct sigpvc), M_DEVBUF);
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} else {
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/*
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* Otherwise, set new state indicating detach in progress.
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* The protocol instance will be freed during sigpvc_free
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* processing for the last queued vcc.
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*/
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pvp->pv_state = SIGPVC_DETACH;
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}
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return (0);
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}
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/*
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* Open a SigPVC ATM Connection
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*
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* All service user requests to open a VC connection (via atm_open_connection)
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* over an ATM interface attached to the SigPVC signalling manager are handled
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* here. Only PVC requests are allowed.
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*
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* Function will be called at splnet.
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*
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* Arguments:
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* cvp pointer to CM's connection VCC
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* errp location to store an error code if CALL_FAILED is returned
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*
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* Returns:
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* CALL_PROCEEDING - connection establishment is in progress
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* CALL_FAILED - connection establishment failed
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* CALL_CONNECTED - connection has been successfully established
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*
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*/
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static int
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sigpvc_setup(cvp, errp)
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Atm_connvc *cvp;
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int *errp;
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{
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struct sigpvc *pvp =
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(struct sigpvc *)cvp->cvc_attr.nif->nif_pif->pif_siginst;
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int ret;
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/*
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* See what signalling has to say
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*/
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switch (pvp->pv_state) {
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case SIGPVC_ACTIVE:
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break;
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default:
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*errp = ENXIO;
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ret = CALL_FAILED;
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goto done;
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}
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/*
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* Open requested type of connection
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*/
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switch (cvp->cvc_attr.called.addr.address_format) {
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case T_ATM_PVC_ADDR:
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/*
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* Create a PVC
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*/
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ret = sigpvc_create_pvc(pvp, cvp, errp);
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break;
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default:
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*errp = EPROTONOSUPPORT;
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ret = CALL_FAILED;
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}
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done:
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return (ret);
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}
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/*
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* Close a SigPVC ATM Connection
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*
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* All service user requests to terminate a previously open VC connection
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* (via the atm_close_connection function), which is running over an interface
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* attached to the SigPVC signalling manager, are handled here.
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*
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* Function will be called at splnet.
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*
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* Arguments:
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* vcp pointer to connection's VC control block
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* errp location to store an error code if CALL_FAILED is returned
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*
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* Returns:
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* CALL_PROCEEDING - connection termination is in progress
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* CALL_FAILED - connection termination failed
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* CALL_CLEARED - connection has been successfully terminated
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*
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*/
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static int
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sigpvc_release(vcp, errp)
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struct vccb *vcp;
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int *errp;
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{
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/*
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* Make sure VCC is open
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*/
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if ((vcp->vc_sstate == VCCS_NULL) || (vcp->vc_sstate == VCCS_FREE) ||
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(vcp->vc_ustate == VCCU_NULL) || (vcp->vc_ustate == VCCU_CLOSED)) {
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*errp = EALREADY;
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return (CALL_FAILED);
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}
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/*
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* Not much else to do except close the vccb
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*/
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sigpvc_close_vcc(vcp);
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return (CALL_CLEARED);
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}
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/*
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* Free SigPVC ATM Connection Resources
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*
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* All service user requests to free the resources of a closed VCC connection
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* (via the atm_free_connection function), which is running over an interface
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* attached to the SigPVC signalling manager, are handled here.
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*
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* Function will be called at splnet.
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*
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* Arguments:
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* vcp pointer to connection's VCC control block
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*
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* Returns:
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* 0 connection free was successful
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* errno connection free failed - reason indicated
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*
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*/
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static int
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sigpvc_free(vcp)
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struct vccb *vcp;
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{
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struct atm_pif *pip = vcp->vc_pif;
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struct sigpvc *pvp = (struct sigpvc *)pip->pif_siginst;
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/*
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* Make sure VCC has been closed
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*/
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if ((vcp->vc_ustate != VCCU_CLOSED) || (vcp->vc_sstate != VCCS_FREE))
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return (EEXIST);
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/*
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* Remove vccb from protocol queue
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*/
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DEQUEUE(vcp, struct vccb, vc_sigelem, pvp->pv_vccq);
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/*
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* Free vccb storage
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*/
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vcp->vc_ustate = VCCU_NULL;
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vcp->vc_sstate = VCCS_NULL;
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atm_free((caddr_t)vcp);
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/*
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* If we're detaching and this was the last vcc queued,
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* get rid of the protocol instance
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*/
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if ((pvp->pv_state == SIGPVC_DETACH) &&
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(Q_HEAD(pvp->pv_vccq, struct vccb) == NULL)) {
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struct sigmgr *smp = pip->pif_sigmgr;
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pip->pif_sigmgr = NULL;
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pip->pif_siginst = NULL;
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UNLINK((struct siginst *)pvp, struct siginst, smp->sm_prinst,
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si_next);
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KM_FREE(pvp, sizeof(struct sigpvc), M_DEVBUF);
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}
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return (0);
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}
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/*
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* Process Signalling Manager PF_ATM ioctls
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*
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* Function will be called at splnet.
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*
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* Arguments:
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* code PF_ATM sub-operation code
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* data pointer to code specific parameter data area
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* arg1 pointer to code specific argument
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*
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* Returns:
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* 0 request procesed
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* errno error processing request - reason indicated
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*
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*/
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static int
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sigpvc_ioctl(code, data, arg1)
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int code;
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caddr_t data;
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caddr_t arg1;
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{
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struct atmdelreq *adp;
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struct atminfreq *aip;
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struct air_vcc_rsp avr;
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struct sigpvc *pvp;
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struct vccb *vcp;
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Atm_connection *cop;
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caddr_t cp;
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u_int vpi, vci;
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int i, space, err = 0;
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switch (code) {
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case AIOCS_DEL_PVC:
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/*
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* Delete a PVC
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*/
|
|
adp = (struct atmdelreq *)data;
|
|
pvp = (struct sigpvc *)arg1;
|
|
|
|
/*
|
|
* Find requested VCC
|
|
*/
|
|
vpi = adp->adr_pvc_vpi;
|
|
vci = adp->adr_pvc_vci;
|
|
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))
|
|
break;
|
|
}
|
|
if (vcp == NULL)
|
|
return (ENOENT);
|
|
|
|
/*
|
|
* Schedule VCC termination
|
|
*/
|
|
err = atm_cm_abort(vcp->vc_connvc, &sigpvc_cause.v);
|
|
break;
|
|
|
|
case AIOCS_DEL_SVC:
|
|
/*
|
|
* Delete a SVC
|
|
*/
|
|
err = ENOENT;
|
|
break;
|
|
|
|
case AIOCS_INF_VCC:
|
|
/*
|
|
* Get VCC information
|
|
*/
|
|
aip = (struct atminfreq *)data;
|
|
pvp = (struct sigpvc *)arg1;
|
|
|
|
cp = aip->air_buf_addr;
|
|
space = aip->air_buf_len;
|
|
|
|
/*
|
|
* Get info for all VCCs on interface
|
|
*/
|
|
for (vcp = Q_HEAD(pvp->pv_vccq, struct vccb); vcp;
|
|
vcp = Q_NEXT(vcp, struct vccb, vc_sigelem)) {
|
|
/*
|
|
* Make sure there's room in user buffer
|
|
*/
|
|
if (space < sizeof(avr)) {
|
|
err = ENOSPC;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Fill in info to be returned
|
|
*/
|
|
(void) snprintf(avr.avp_intf, sizeof(avr.avp_intf),
|
|
"%s%d",
|
|
pvp->pv_pif->pif_name, pvp->pv_pif->pif_unit);
|
|
avr.avp_vpi = vcp->vc_vpi;
|
|
avr.avp_vci = vcp->vc_vci;
|
|
avr.avp_type = vcp->vc_type;
|
|
avr.avp_sig_proto = ATM_SIG_PVC;
|
|
avr.avp_aal = vcp->vc_connvc->cvc_attr.aal.type;
|
|
cop = vcp->vc_connvc->cvc_conn;
|
|
if (cop)
|
|
avr.avp_encaps = cop->co_mpx;
|
|
else
|
|
avr.avp_encaps = 0;
|
|
KM_ZERO(avr.avp_owners, sizeof(avr.avp_owners));
|
|
for (i = 0; cop && i < sizeof(avr.avp_owners);
|
|
cop = cop->co_next,
|
|
i += T_ATM_APP_NAME_LEN+1) {
|
|
strncpy(&avr.avp_owners[i],
|
|
cop->co_endpt->ep_getname(cop->co_toku),
|
|
T_ATM_APP_NAME_LEN);
|
|
}
|
|
avr.avp_state = vcp->vc_sstate;
|
|
avr.avp_daddr.address_format = T_ATM_ABSENT;
|
|
avr.avp_dsubaddr.address_format = T_ATM_ABSENT;
|
|
avr.avp_ipdus = vcp->vc_ipdus;
|
|
avr.avp_opdus = vcp->vc_opdus;
|
|
avr.avp_ibytes = vcp->vc_ibytes;
|
|
avr.avp_obytes = vcp->vc_obytes;
|
|
avr.avp_ierrors = vcp->vc_ierrors;
|
|
avr.avp_oerrors = vcp->vc_oerrors;
|
|
avr.avp_tstamp = vcp->vc_tstamp;
|
|
|
|
/*
|
|
* Copy data to user buffer and update buffer info
|
|
*/
|
|
if ((err = copyout((caddr_t)&avr, cp, sizeof(avr))) != 0)
|
|
break;
|
|
cp += sizeof(avr);
|
|
space -= sizeof(avr);
|
|
}
|
|
|
|
/*
|
|
* Update buffer pointer/count
|
|
*/
|
|
aip->air_buf_addr = cp;
|
|
aip->air_buf_len = space;
|
|
break;
|
|
|
|
case AIOCS_INF_ARP:
|
|
case AIOCS_INF_ASV:
|
|
/*
|
|
* Get ARP table/server information
|
|
*/
|
|
/* We don't maintain any ARP information */
|
|
break;
|
|
|
|
default:
|
|
err = EOPNOTSUPP;
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
#ifdef ATM_SIGPVC_MODULE
|
|
/*
|
|
*******************************************************************
|
|
*
|
|
* Loadable Module Support
|
|
*
|
|
*******************************************************************
|
|
*/
|
|
static int sigpvc_doload __P((void));
|
|
static int sigpvc_dounload __P((void));
|
|
|
|
/*
|
|
* Generic module load processing
|
|
*
|
|
* This function is called by an OS-specific function when this
|
|
* module is being loaded.
|
|
*
|
|
* Arguments:
|
|
* none
|
|
*
|
|
* Returns:
|
|
* 0 load was successful
|
|
* errno load failed - reason indicated
|
|
*
|
|
*/
|
|
static int
|
|
sigpvc_doload()
|
|
{
|
|
int err = 0;
|
|
|
|
/*
|
|
* Start us up
|
|
*/
|
|
err = sigpvc_start();
|
|
if (err)
|
|
/* Problems, clean up */
|
|
(void)sigpvc_stop();
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Generic module unload processing
|
|
*
|
|
* This function is called by an OS-specific function when this
|
|
* module is being unloaded.
|
|
*
|
|
* Arguments:
|
|
* none
|
|
*
|
|
* Returns:
|
|
* 0 unload was successful
|
|
* errno unload failed - reason indicated
|
|
*
|
|
*/
|
|
static int
|
|
sigpvc_dounload()
|
|
{
|
|
int err = 0;
|
|
|
|
/*
|
|
* OK, try to clean up our mess
|
|
*/
|
|
err = sigpvc_stop();
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
|
|
|
|
#include <sys/exec.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/lkm.h>
|
|
|
|
/*
|
|
* Loadable miscellaneous module description
|
|
*/
|
|
MOD_MISC(sigpvc);
|
|
|
|
|
|
/*
|
|
* Loadable module support "load" entry point
|
|
*
|
|
* This is the routine called by the lkm driver whenever the
|
|
* modload(1) command is issued for this module.
|
|
*
|
|
* Arguments:
|
|
* lkmtp pointer to lkm drivers's structure
|
|
* cmd lkm command code
|
|
*
|
|
* Returns:
|
|
* 0 command was successful
|
|
* errno command failed - reason indicated
|
|
*
|
|
*/
|
|
static int
|
|
sigpvc_load(lkmtp, cmd)
|
|
struct lkm_table *lkmtp;
|
|
int cmd;
|
|
{
|
|
return(sigpvc_doload());
|
|
}
|
|
|
|
|
|
/*
|
|
* Loadable module support "unload" entry point
|
|
*
|
|
* This is the routine called by the lkm driver whenever the
|
|
* modunload(1) command is issued for this module.
|
|
*
|
|
* Arguments:
|
|
* lkmtp pointer to lkm drivers's structure
|
|
* cmd lkm command code
|
|
*
|
|
* Returns:
|
|
* 0 command was successful
|
|
* errno command failed - reason indicated
|
|
*
|
|
*/
|
|
static int
|
|
sigpvc_unload(lkmtp, cmd)
|
|
struct lkm_table *lkmtp;
|
|
int cmd;
|
|
{
|
|
return(sigpvc_dounload());
|
|
}
|
|
|
|
|
|
/*
|
|
* Loadable module support entry point
|
|
*
|
|
* This is the routine called by the lkm driver for all loadable module
|
|
* functions for this driver. This routine name must be specified
|
|
* on the modload(1) command. This routine will be called whenever the
|
|
* modload(1), modunload(1) or modstat(1) commands are issued for this
|
|
* module.
|
|
*
|
|
* Arguments:
|
|
* lkmtp pointer to lkm drivers's structure
|
|
* cmd lkm command code
|
|
* ver lkm version
|
|
*
|
|
* Returns:
|
|
* 0 command was successful
|
|
* errno command failed - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
sigpvc_mod(lkmtp, cmd, ver)
|
|
struct lkm_table *lkmtp;
|
|
int cmd;
|
|
int ver;
|
|
{
|
|
MOD_DISPATCH(sigpvc, lkmtp, cmd, ver,
|
|
sigpvc_load, sigpvc_unload, lkm_nullcmd);
|
|
}
|
|
|
|
#else /* !ATM_SIGPVC_MODULE */
|
|
|
|
/*
|
|
*******************************************************************
|
|
*
|
|
* Kernel Compiled Module Support
|
|
*
|
|
*******************************************************************
|
|
*/
|
|
static void sigpvc_doload __P((void *));
|
|
|
|
SYSINIT(atmsigpvc, SI_SUB_PROTO_END, SI_ORDER_ANY, sigpvc_doload, NULL)
|
|
|
|
/*
|
|
* Kernel initialization
|
|
*
|
|
* Arguments:
|
|
* arg Not used
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
static void
|
|
sigpvc_doload(void *arg)
|
|
{
|
|
int err = 0;
|
|
|
|
/*
|
|
* Start us up
|
|
*/
|
|
err = sigpvc_start();
|
|
if (err) {
|
|
/* Problems, clean up */
|
|
(void)sigpvc_stop();
|
|
|
|
log(LOG_ERR, "ATM SIGPVC unable to initialize (%d)!!\n", err);
|
|
}
|
|
return;
|
|
}
|
|
#endif /* ATM_SIGPVC_MODULE */
|
|
|