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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.
*
* @(#) $Id: atmarp_timer.c,v 1.1 1998/09/15 08:23:15 phk Exp $
*
*/
/*
* Server Cache Synchronization Protocol (SCSP) Support
* ----------------------------------------------------
*
* SCSP-ATMARP server interface: timer routines
*
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_ioctl.h>
#include <errno.h>
#include <libatm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "../scspd/scsp_msg.h"
#include "../scspd/scsp_if.h"
#include "../scspd/scsp_var.h"
#include "atmarp_var.h"
#ifndef lint
__RCSID("@(#) $Id: atmarp_timer.c,v 1.1 1998/09/15 08:23:15 phk Exp $");
#endif
/*
* Cache update timeout processing
*
* When the cache update timer fires, we read the cache from the
* kernel, update the internal cache, and restart the timer.
*
* Arguments:
* tp pointer to a HARP timer block
*
* Returns:
* None
*
*/
void
atmarp_cache_timeout(tp)
Harp_timer *tp;
{
Atmarp_intf *aip;
/*
* Verify the status of all configured interfaces
*/
for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
if (atmarp_if_ready(aip)) {
/*
* The interface is up but we don't have
* a connection to SCSP--make a connection
*/
if (aip->ai_state == AI_STATE_NULL)
(void)atmarp_scsp_connect(aip);
} else {
/*
* The interface is down--disconnect from SCSP
*/
if (aip->ai_state != AI_STATE_NULL)
(void)atmarp_scsp_disconnect(aip);
}
}
/*
* Read the cache from the kernel
*/
atmarp_get_updated_cache();
/*
* Restart the cache update timer
*/
HARP_TIMER(tp, ATMARP_CACHE_INTERVAL, atmarp_cache_timeout);
}
/*
* Permanent cache entry timer processing
*
* Permanent cache entries (entries that are administratively added
* and the entry for the server itself) don't ever get refreshed, so
* we broadcast updates for them every 10 minutes so they won't get
* deleted from the remote servers' caches
*
* Arguments:
* tp pointer to a HARP timer block
*
* Returns:
* None
*
*/
void
atmarp_perm_timeout(tp)
Harp_timer *tp;
{
int i, rc;
Atmarp_intf *aip;
Atmarp *aap;
/*
* Loop through all interfaces
*/
for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
/*
* Loop through the interface's cache
*/
for (i = 0; i < ATMARP_HASHSIZ; i++) {
for (aap = aip->ai_arptbl[i]; aap;
aap = aap->aa_next) {
/*
* Find and update permanent entries
*/
if ((aap->aa_flags & (AAF_PERM |
AAF_SERVER)) != 0) {
aap->aa_seq++;
rc = atmarp_scsp_update(aap,
SCSP_ASTATE_UPD);
}
}
}
}
/*
* Restart the permanent cache entry timer
*/
HARP_TIMER(tp, ATMARP_PERM_INTERVAL, atmarp_perm_timeout);
}
/*
* Keepalive timeout processing
*
* When the keepalive timer fires, we send a NOP to SCSP. This
* will help us detect a broken connection.
*
* Arguments:
* tp pointer to a HARP timer block
*
* Returns:
* None
*
*/
void
atmarp_keepalive_timeout(tp)
Harp_timer *tp;
{
Atmarp_intf *aip;
Scsp_if_msg *msg;
/*
* Back off to start of DCS entry
*/
aip = (Atmarp_intf *) ((caddr_t)tp -
(int)(&((Atmarp_intf *)0)->ai_keepalive_t));
/*
* Get a message buffer
*/
msg = (Scsp_if_msg *)UM_ALLOC(sizeof(Scsp_if_msg));
if (!msg) {
}
UM_ZERO(msg, sizeof(Scsp_if_msg));
/*
* Build a NOP message
*/
msg->si_type = SCSP_NOP_REQ;
msg->si_proto = SCSP_PROTO_ATMARP;
msg->si_len = sizeof(Scsp_if_msg_hdr);
/*
* Send the message to SCSP
*/
(void)atmarp_scsp_out(aip, (char *)msg, msg->si_len);
UM_FREE(msg);
/*
* Restart the keepalive timer
*/
HARP_TIMER(&aip->ai_keepalive_t, ATMARP_KEEPALIVE_INTERVAL,
atmarp_keepalive_timeout);
}
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