3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
8 * This Host ATM Research Platform ("HARP") file (the "Software") is
9 * made available by Network Computing Services, Inc. ("NetworkCS")
10 * "AS IS". NetworkCS does not provide maintenance, improvements or
11 * support of any kind.
13 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
14 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
15 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
16 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
17 * In no event shall NetworkCS be responsible for any damages, including
18 * but not limited to consequential damages, arising from or relating to
19 * any use of the Software or related support.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/usr.sbin/atm/atmarpd/atmarp_timer.c,v 1.3 1999/08/28 01:15:30 peter Exp $
27 * @(#) $DragonFly: src/usr.sbin/atm/atmarpd/atmarp_timer.c,v 1.3 2003/11/15 20:33:42 eirikn Exp $
31 * Server Cache Synchronization Protocol (SCSP) Support
32 * ----------------------------------------------------
34 * SCSP-ATMARP server interface: timer routines
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <netatm/port.h>
44 #include <netatm/queue.h>
45 #include <netatm/atm.h>
46 #include <netatm/atm_if.h>
47 #include <netatm/atm_sap.h>
48 #include <netatm/atm_sys.h>
49 #include <netatm/atm_ioctl.h>
58 #include "../scspd/scsp_msg.h"
59 #include "../scspd/scsp_if.h"
60 #include "../scspd/scsp_var.h"
61 #include "atmarp_var.h"
64 * Cache update timeout processing
66 * When the cache update timer fires, we read the cache from the
67 * kernel, update the internal cache, and restart the timer.
70 * tp pointer to a HARP timer block
77 atmarp_cache_timeout(Harp_timer *tp)
82 * Verify the status of all configured interfaces
84 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
85 if (atmarp_if_ready(aip)) {
87 * The interface is up but we don't have
88 * a connection to SCSP--make a connection
90 if (aip->ai_state == AI_STATE_NULL)
91 (void)atmarp_scsp_connect(aip);
94 * The interface is down--disconnect from SCSP
96 if (aip->ai_state != AI_STATE_NULL)
97 (void)atmarp_scsp_disconnect(aip);
102 * Read the cache from the kernel
104 atmarp_get_updated_cache();
107 * Restart the cache update timer
109 HARP_TIMER(tp, ATMARP_CACHE_INTERVAL, atmarp_cache_timeout);
114 * Permanent cache entry timer processing
116 * Permanent cache entries (entries that are administratively added
117 * and the entry for the server itself) don't ever get refreshed, so
118 * we broadcast updates for them every 10 minutes so they won't get
119 * deleted from the remote servers' caches
122 * tp pointer to a HARP timer block
129 atmarp_perm_timeout(Harp_timer *tp)
136 * Loop through all interfaces
138 for (aip = atmarp_intf_head; aip; aip = aip->ai_next) {
140 * Loop through the interface's cache
142 for (i = 0; i < ATMARP_HASHSIZ; i++) {
143 for (aap = aip->ai_arptbl[i]; aap;
144 aap = aap->aa_next) {
146 * Find and update permanent entries
148 if ((aap->aa_flags & (AAF_PERM |
151 rc = atmarp_scsp_update(aap,
159 * Restart the permanent cache entry timer
161 HARP_TIMER(tp, ATMARP_PERM_INTERVAL, atmarp_perm_timeout);
166 * Keepalive timeout processing
168 * When the keepalive timer fires, we send a NOP to SCSP. This
169 * will help us detect a broken connection.
172 * tp pointer to a HARP timer block
179 atmarp_keepalive_timeout(Harp_timer *tp)
185 * Back off to start of DCS entry
187 aip = (Atmarp_intf *) ((caddr_t)tp -
188 (int)(&((Atmarp_intf *)0)->ai_keepalive_t));
191 * Get a message buffer
193 msg = (Scsp_if_msg *)UM_ALLOC(sizeof(Scsp_if_msg));
196 UM_ZERO(msg, sizeof(Scsp_if_msg));
199 * Build a NOP message
201 msg->si_type = SCSP_NOP_REQ;
202 msg->si_proto = SCSP_PROTO_ATMARP;
203 msg->si_len = sizeof(Scsp_if_msg_hdr);
206 * Send the message to SCSP
208 (void)atmarp_scsp_out(aip, (char *)msg, msg->si_len);
212 * Restart the keepalive timer
214 HARP_TIMER(&aip->ai_keepalive_t, ATMARP_KEEPALIVE_INTERVAL,
215 atmarp_keepalive_timeout);