1 // L2TPNS Clustering Stuff
3 char const *cvs_id_cluster
= "$Id: cluster.c,v 1.38 2005/05/24 07:45:13 bodea Exp $";
12 #include <sys/socket.h>
13 #include <netinet/in.h>
14 #include <arpa/inet.h>
15 #include <sys/ioctl.h>
31 * All cluster packets have the same format.
33 * One or more instances of
35 * a 32 bit 'extra' data dependant on the 'type'.
36 * zero or more bytes of structure data, dependant on the type.
41 int cluster_sockfd
= 0; // The filedescriptor for the cluster communications port.
43 in_addr_t my_address
= 0; // The network address of my ethernet port.
44 static int walk_session_number
= 0; // The next session to send when doing the slow table walk.
45 static int walk_tunnel_number
= 0; // The next tunnel to send when doing the slow table walk.
46 int forked
= 0; // Sanity check: CLI must not diddle with heartbeat table
48 #define MAX_HEART_SIZE (8192) // Maximum size of heartbeat packet. Must be less than max IP packet size :)
49 #define MAX_CHANGES (MAX_HEART_SIZE/(sizeof(sessiont) + sizeof(int) ) - 2) // Assumes a session is the biggest type!
54 } cluster_changes
[MAX_CHANGES
]; // Queue of changed structures that need to go out when next heartbeat.
59 char data
[MAX_HEART_SIZE
];
60 } past_hearts
[HB_HISTORY_SIZE
]; // Ring buffer of heartbeats that we've recently sent out. Needed so
61 // we can re-transmit if needed.
68 } peers
[CLUSTER_MAX_SIZE
]; // List of all the peers we've heard from.
69 static int num_peers
; // Number of peers in list.
71 static int rle_decompress(uint8_t **src_p
, int ssize
, uint8_t *dst
, int dsize
);
72 static int rle_compress(uint8_t **src_p
, int ssize
, uint8_t *dst
, int dsize
);
75 // Create a listening socket
77 // This joins the cluster multi-cast group.
81 struct sockaddr_in addr
;
82 struct sockaddr_in interface_addr
;
87 config
->cluster_undefined_sessions
= MAXSESSION
-1;
88 config
->cluster_undefined_tunnels
= MAXTUNNEL
-1;
90 if (!config
->cluster_address
)
92 if (!*config
->cluster_interface
)
95 cluster_sockfd
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
97 memset(&addr
, 0, sizeof(addr
));
98 addr
.sin_family
= AF_INET
;
99 addr
.sin_port
= htons(CLUSTERPORT
);
100 addr
.sin_addr
.s_addr
= INADDR_ANY
;
101 setsockopt(cluster_sockfd
, SOL_SOCKET
, SO_REUSEADDR
, &addr
, sizeof(addr
));
103 opt
= fcntl(cluster_sockfd
, F_GETFL
, 0);
104 fcntl(cluster_sockfd
, F_SETFL
, opt
| O_NONBLOCK
);
106 if (bind(cluster_sockfd
, (void *) &addr
, sizeof(addr
)) < 0)
108 LOG(0, 0, 0, "Failed to bind cluster socket: %s\n", strerror(errno
));
112 strcpy(ifr
.ifr_name
, config
->cluster_interface
);
113 if (ioctl(cluster_sockfd
, SIOCGIFADDR
, &ifr
) < 0)
115 LOG(0, 0, 0, "Failed to get interface address for (%s): %s\n", config
->cluster_interface
, strerror(errno
));
119 memcpy(&interface_addr
, &ifr
.ifr_addr
, sizeof(interface_addr
));
120 my_address
= interface_addr
.sin_addr
.s_addr
;
122 // Join multicast group.
123 mreq
.imr_multiaddr
.s_addr
= config
->cluster_address
;
124 mreq
.imr_interface
= interface_addr
.sin_addr
;
127 opt
= 0; // Turn off multicast loopback.
128 setsockopt(cluster_sockfd
, IPPROTO_IP
, IP_MULTICAST_LOOP
, &opt
, sizeof(opt
));
130 if (setsockopt(cluster_sockfd
, IPPROTO_IP
, IP_ADD_MEMBERSHIP
, &mreq
, sizeof(mreq
)) < 0)
132 LOG(0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno
));
136 if (setsockopt(cluster_sockfd
, IPPROTO_IP
, IP_MULTICAST_IF
, &interface_addr
, sizeof(interface_addr
)) < 0)
138 LOG(0, 0, 0, "Failed to setsockopt (set mcast interface): %s\n", strerror(errno
));
142 config
->cluster_last_hb
= TIME
;
143 config
->cluster_seq_number
= -1;
145 return cluster_sockfd
;
150 // Send a chunk of data to the entire cluster (usually via the multicast
154 static int cluster_send_data(void *data
, int datalen
)
156 struct sockaddr_in addr
= {0};
158 if (!cluster_sockfd
) return -1;
159 if (!config
->cluster_address
) return 0;
161 addr
.sin_addr
.s_addr
= config
->cluster_address
;
162 addr
.sin_port
= htons(CLUSTERPORT
);
163 addr
.sin_family
= AF_INET
;
165 LOG(5, 0, 0, "Cluster send data: %d bytes\n", datalen
);
167 if (sendto(cluster_sockfd
, data
, datalen
, MSG_NOSIGNAL
, (void *) &addr
, sizeof(addr
)) < 0)
169 LOG(0, 0, 0, "sendto: %s\n", strerror(errno
));
177 // Add a chunk of data to a heartbeat packet.
178 // Maintains the format. Assumes that the caller
179 // has passed in a big enough buffer!
181 static void add_type(char **p
, int type
, int more
, char *data
, int size
)
183 *((uint32_t *) (*p
)) = type
;
184 *p
+= sizeof(uint32_t);
186 *((uint32_t *)(*p
)) = more
;
187 *p
+= sizeof(uint32_t);
189 if (data
&& size
> 0) {
190 memcpy(*p
, data
, size
);
195 // advertise our presence via BGP or gratuitous ARP
196 static void advertise(void)
200 bgp_enable_routing(1);
203 if (config
->send_garp
)
204 send_garp(config
->bind_address
); // Start taking traffic.
207 static void cluster_uptodate(void)
209 if (config
->cluster_iam_uptodate
)
212 if (config
->cluster_undefined_sessions
|| config
->cluster_undefined_tunnels
)
215 config
->cluster_iam_uptodate
= 1;
217 LOG(0, 0, 0, "Now uptodate with master.\n");
222 // Send a unicast UDP packet to a peer with 'data' as the
225 static int peer_send_data(in_addr_t peer
, char *data
, int size
)
227 struct sockaddr_in addr
= {0};
229 if (!cluster_sockfd
) return -1;
230 if (!config
->cluster_address
) return 0;
235 addr
.sin_addr
.s_addr
= peer
;
236 addr
.sin_port
= htons(CLUSTERPORT
);
237 addr
.sin_family
= AF_INET
;
239 LOG_HEX(5, "Peer send", data
, size
);
241 if (sendto(cluster_sockfd
, data
, size
, MSG_NOSIGNAL
, (void *) &addr
, sizeof(addr
)) < 0)
243 LOG(0, 0, 0, "sendto: %s\n", strerror(errno
));
251 // Send a structured message to a peer with a single element of type 'type'.
253 static int peer_send_message(in_addr_t peer
, int type
, int more
, char *data
, int size
)
255 char buf
[65536]; // Vast overkill.
258 LOG(4, 0, 0, "Sending message to peer (type %d, more %d, size %d)\n", type
, more
, size
);
259 add_type(&p
, type
, more
, data
, size
);
261 return peer_send_data(peer
, buf
, (p
-buf
) );
265 // Forward a state changing packet to the master.
267 // The master just processes the payload as if it had
268 // received it off the tun device.
270 int master_forward_packet(char *data
, int size
, in_addr_t addr
, int port
)
272 char buf
[65536]; // Vast overkill.
275 if (!config
->cluster_master_address
) // No election has been held yet. Just skip it.
278 LOG(4, 0, 0, "Forwarding packet from %s to master (size %d)\n", fmtaddr(addr
, 0), size
);
281 add_type(&p
, C_FORWARD
, addr
, (char *) &port
, sizeof(port
));
282 memcpy(p
, data
, size
);
285 return peer_send_data(config
->cluster_master_address
, buf
, (p
- buf
));
289 // Forward a throttled packet to the master for handling.
291 // The master just drops the packet into the appropriate
292 // token bucket queue, and lets normal processing take care
295 int master_throttle_packet(int tbfid
, char *data
, int size
)
297 char buf
[65536]; // Vast overkill.
300 if (!config
->cluster_master_address
) // No election has been held yet. Just skip it.
303 LOG(4, 0, 0, "Throttling packet master (size %d, tbfid %d)\n", size
, tbfid
);
305 add_type(&p
, C_THROTTLE
, tbfid
, data
, size
);
307 return peer_send_data(config
->cluster_master_address
, buf
, (p
-buf
) );
312 // Forward a walled garden packet to the master for handling.
314 // The master just writes the packet straight to the tun
315 // device (where is will normally loop through the
316 // firewall rules, and come back in on the tun device)
318 // (Note that this must be called with the tun header
319 // as the start of the data).
320 int master_garden_packet(sessionidt s
, char *data
, int size
)
322 char buf
[65536]; // Vast overkill.
325 if (!config
->cluster_master_address
) // No election has been held yet. Just skip it.
328 LOG(4, 0, 0, "Walled garden packet to master (size %d)\n", size
);
330 add_type(&p
, C_GARDEN
, s
, data
, size
);
332 return peer_send_data(config
->cluster_master_address
, buf
, (p
-buf
));
337 // Send a chunk of data as a heartbeat..
338 // We save it in the history buffer as we do so.
340 static void send_heartbeat(int seq
, char *data
, int size
)
344 if (size
> sizeof(past_hearts
[0].data
))
346 LOG(0, 0, 0, "Tried to heartbeat something larger than the maximum packet!\n");
350 i
= seq
% HB_HISTORY_SIZE
;
351 past_hearts
[i
].seq
= seq
;
352 past_hearts
[i
].size
= size
;
353 memcpy(&past_hearts
[i
].data
, data
, size
); // Save it.
354 cluster_send_data(data
, size
);
358 // Send an 'i am alive' message to every machine in the cluster.
360 void cluster_send_ping(time_t basetime
)
362 char buff
[100 + sizeof(pingt
)];
366 if (config
->cluster_iam_master
&& basetime
) // We're heartbeating so no need to ping.
369 LOG(5, 0, 0, "Sending cluster ping...\n");
372 x
.addr
= config
->bind_address
;
373 x
.undef
= config
->cluster_undefined_sessions
+ config
->cluster_undefined_tunnels
;
374 x
.basetime
= basetime
;
376 add_type(&p
, C_PING
, basetime
, (char *) &x
, sizeof(x
));
377 cluster_send_data(buff
, (p
-buff
) );
381 // Walk the session counters looking for non-zero ones to send
382 // to the master. We send up to 600 of them at one time.
383 // We examine a maximum of 3000 sessions.
384 // (50k max session should mean that we normally
385 // examine the entire session table every 25 seconds).
387 #define MAX_B_RECS (600)
388 void master_update_counts(void)
391 bytest b
[MAX_B_RECS
+1];
393 if (config
->cluster_iam_master
) // Only happens on the slaves.
396 if (!config
->cluster_master_address
) // If we don't have a master, skip it for a while.
399 i
= MAX_B_RECS
* 5; // Examine max 2000 sessions;
400 if (config
->cluster_highest_sessionid
> i
)
401 i
= config
->cluster_highest_sessionid
;
403 for ( c
= 0; i
> 0 ; --i
) {
404 // Next session to look at.
405 walk_session_number
++;
406 if ( walk_session_number
> config
->cluster_highest_sessionid
)
407 walk_session_number
= 1;
409 if (!sess_local
[walk_session_number
].cin
&& !sess_local
[walk_session_number
].cout
)
410 continue; // Unused. Skip it.
412 b
[c
].sid
= walk_session_number
;
413 b
[c
].in
= sess_local
[walk_session_number
].cin
;
414 b
[c
].out
= sess_local
[walk_session_number
].cout
;
416 if (++c
> MAX_B_RECS
) // Send a max of 400 elements in a packet.
420 sess_local
[walk_session_number
].cin
= sess_local
[walk_session_number
].cout
= 0;
423 if (!c
) // Didn't find any that changes. Get out of here!
427 // Forward the data to the master.
428 LOG(4, 0, 0, "Sending byte counters to master (%d elements)\n", c
);
429 peer_send_message(config
->cluster_master_address
, C_BYTES
, c
, (char *) &b
, sizeof(b
[0]) * c
);
434 // On the master, check how our slaves are going. If
435 // one of them's not up-to-date we'll heartbeat faster.
436 // If we don't have any of them, then we need to turn
437 // on our own packet handling!
439 void cluster_check_slaves(void)
442 static int have_peers
= 0;
443 int had_peers
= have_peers
;
446 if (!config
->cluster_iam_master
)
447 return; // Only runs on the master...
449 config
->cluster_iam_uptodate
= 1; // cleared in loop below
451 for (i
= have_peers
= 0; i
< num_peers
; i
++)
453 if ((peers
[i
].timestamp
+ config
->cluster_hb_timeout
) < t
)
454 continue; // Stale peer! Skip them.
456 if (!peers
[i
].basetime
)
457 continue; // Shutdown peer! Skip them.
459 if (peers
[i
].uptodate
)
462 if (!peers
[i
].uptodate
)
463 config
->cluster_iam_uptodate
= 0; // Start fast heartbeats
467 // in a cluster, withdraw/add routes when we get a peer/lose all peers
468 if (bgp_configured
&& have_peers
!= had_peers
)
469 bgp_enable_routing(!have_peers
);
474 // Check that we have a master. If it's been too
475 // long since we heard from a master then hold an election.
477 void cluster_check_master(void)
479 int i
, count
, tcount
, high_unique_id
= 0;
482 static int probed
= 0;
484 if (config
->cluster_iam_master
)
485 return; // Only runs on the slaves...
487 // If the master is late (missed 2 hearbeats by a second and a
488 // hair) it may be that the switch has dropped us from the
489 // multicast group, try unicasting one probe to the master
490 // which will hopefully respond with a unicast heartbeat that
491 // will allow us to limp along until the querier next runs.
492 if (TIME
> (config
->cluster_last_hb
+ 2 * config
->cluster_hb_interval
+ 11))
494 if (!probed
&& config
->cluster_master_address
)
497 LOG(1, 0, 0, "Heartbeat from master %.1fs late, probing...\n",
498 0.1 * (TIME
- (config
->cluster_last_hb
+ config
->cluster_hb_interval
)));
500 peer_send_message(config
->cluster_master_address
,
501 C_LASTSEEN
, config
->cluster_seq_number
, NULL
, 0);
503 } else { // We got a recent heartbeat; reset the probe flag.
507 if (TIME
< (config
->cluster_last_hb
+ config
->cluster_hb_timeout
))
508 return; // Everything's ok!
510 config
->cluster_last_hb
= TIME
+ 1; // Just the one election thanks.
512 LOG(0, 0, 0, "Master timed out! Holding election...\n");
514 for (i
= 0; i
< num_peers
; i
++)
516 if ((peers
[i
].timestamp
+ config
->cluster_hb_timeout
) < t
)
517 continue; // Stale peer! Skip them.
519 if (!peers
[i
].basetime
)
520 continue; // Shutdown peer! Skip them.
522 if (peers
[i
].basetime
< basetime
) {
523 LOG(1, 0, 0, "Expecting %s to become master\n", fmtaddr(peers
[i
].peer
, 0));
524 return; // They'll win the election. Get out of here.
527 if (peers
[i
].basetime
== basetime
&&
528 peers
[i
].peer
> my_address
) {
529 LOG(1, 0, 0, "Expecting %s to become master\n", fmtaddr(peers
[i
].peer
, 0));
530 return; // They'll win the election. Wait for them to come up.
534 // Wow. it's been ages since I last heard a heartbeat
535 // and I'm better than an of my peers so it's time
536 // to become a master!!!
538 config
->cluster_iam_master
= 1;
539 config
->cluster_master_address
= 0;
541 LOG(0, 0, 0, "I am declaring myself the master!\n");
543 if (config
->cluster_seq_number
== -1)
544 config
->cluster_seq_number
= 0;
547 // Go through and mark all the tunnels as defined.
548 // Count the highest used tunnel number as well.
550 config
->cluster_highest_tunnelid
= 0;
551 for (i
= 0, tcount
= 0; i
< MAXTUNNEL
; ++i
) {
552 if (tunnel
[i
].state
== TUNNELUNDEF
)
553 tunnel
[i
].state
= TUNNELFREE
;
555 if (tunnel
[i
].state
!= TUNNELFREE
&& i
> config
->cluster_highest_tunnelid
)
556 config
->cluster_highest_tunnelid
= i
;
560 // Go through and mark all the sessions as being defined.
561 // reset the idle timeouts.
562 // add temporary byte counters to permanent ones.
563 // Re-string the free list.
564 // Find the ID of the highest session.
567 config
->cluster_highest_sessionid
= 0;
568 for (i
= 0, count
= 0; i
< MAXSESSION
; ++i
) {
569 if (session
[i
].tunnel
== T_UNDEF
) {
570 session
[i
].tunnel
= T_FREE
;
574 if (!session
[i
].opened
) { // Unused session. Add to free list.
575 memset(&session
[i
], 0, sizeof(session
[i
]));
576 session
[i
].tunnel
= T_FREE
;
577 session
[last_free
].next
= i
;
583 // Reset idle timeouts..
584 session
[i
].last_packet
= time_now
;
586 // Reset die relative to our uptime rather than the old master's
587 if (session
[i
].die
) session
[i
].die
= TIME
;
589 // Accumulate un-sent byte counters.
590 session
[i
].cin
+= sess_local
[i
].cin
;
591 session
[i
].cout
+= sess_local
[i
].cout
;
592 session
[i
].total_cin
+= sess_local
[i
].cin
;
593 session
[i
].total_cout
+= sess_local
[i
].cout
;
595 sess_local
[i
].cin
= sess_local
[i
].cout
= 0;
597 sess_local
[i
].radius
= 0; // Reset authentication as the radius blocks aren't up to date.
599 if (session
[i
].unique_id
>= high_unique_id
) // This is different to the index into the session table!!!
600 high_unique_id
= session
[i
].unique_id
+1;
602 session
[i
].tbf_in
= session
[i
].tbf_out
= 0; // Remove stale pointers from old master.
603 throttle_session(i
, session
[i
].throttle_in
, session
[i
].throttle_out
);
605 config
->cluster_highest_sessionid
= i
;
608 session
[last_free
].next
= 0; // End of chain.
609 last_id
= high_unique_id
; // Keep track of the highest used session ID.
613 rebuild_address_pool();
615 // If we're not the very first master, this is a big issue!
617 LOG(0, 0, 0, "Warning: Fixed %d uninitialized sessions in becoming master!\n", count
);
619 config
->cluster_undefined_sessions
= 0;
620 config
->cluster_undefined_tunnels
= 0;
621 config
->cluster_iam_uptodate
= 1; // assume all peers are up-to-date
623 if (!num_peers
) // lone master
626 // FIXME. We need to fix up the tunnel control message
627 // queue here! There's a number of other variables we
628 // should also update.
633 // Check that our session table is validly matching what the
634 // master has in mind.
636 // In particular, if we have too many sessions marked 'undefined'
637 // we fix it up here, and we ensure that the 'first free session'
640 static void cluster_check_sessions(int highsession
, int freesession_ptr
, int hightunnel
)
644 sessionfree
= freesession_ptr
; // Keep the freesession ptr valid.
646 if (config
->cluster_iam_uptodate
)
649 if (highsession
> config
->cluster_undefined_sessions
&& hightunnel
> config
->cluster_undefined_tunnels
)
652 // Clear out defined sessions, counting the number of
654 config
->cluster_undefined_sessions
= 0;
655 for (i
= 1 ; i
< MAXSESSION
; ++i
) {
656 if (i
> highsession
) {
657 if (session
[i
].tunnel
== T_UNDEF
) session
[i
].tunnel
= T_FREE
; // Defined.
661 if (session
[i
].tunnel
== T_UNDEF
)
662 ++config
->cluster_undefined_sessions
;
665 // Clear out defined tunnels, counting the number of
667 config
->cluster_undefined_tunnels
= 0;
668 for (i
= 1 ; i
< MAXTUNNEL
; ++i
) {
669 if (i
> hightunnel
) {
670 if (tunnel
[i
].state
== TUNNELUNDEF
) tunnel
[i
].state
= TUNNELFREE
; // Defined.
674 if (tunnel
[i
].state
== TUNNELUNDEF
)
675 ++config
->cluster_undefined_tunnels
;
679 if (config
->cluster_undefined_sessions
|| config
->cluster_undefined_tunnels
) {
680 LOG(2, 0, 0, "Cleared undefined sessions/tunnels. %d sess (high %d), %d tunn (high %d)\n",
681 config
->cluster_undefined_sessions
, highsession
, config
->cluster_undefined_tunnels
, hightunnel
);
685 // Are we up to date?
687 if (!config
->cluster_iam_uptodate
)
691 static int hb_add_type(char **p
, int type
, int id
)
694 case C_CSESSION
: { // Compressed C_SESSION.
695 uint8_t c
[sizeof(sessiont
) * 2]; // Bigger than worst case.
696 uint8_t *d
= (uint8_t *) &session
[id
];
700 size
= rle_compress( &d
, sizeof(sessiont
), c
, sizeof(c
) );
702 // Did we compress the full structure, and is the size actually
704 if ( (d
- orig
) == sizeof(sessiont
) && size
< sizeof(sessiont
) ) {
705 add_type(p
, C_CSESSION
, id
, (char *) c
, size
);
708 // Failed to compress : Fall through.
710 case C_SESSION
: add_type(p
, C_SESSION
, id
,
711 (char *) &session
[id
], sizeof(sessiont
));
714 case C_CTUNNEL
: { // Compressed C_TUNNEL
715 uint8_t c
[sizeof(tunnelt
) * 2]; // Bigger than worst case.
716 uint8_t *d
= (uint8_t *) &tunnel
[id
];
720 size
= rle_compress( &d
, sizeof(tunnelt
), c
, sizeof(c
) );
722 // Did we compress the full structure, and is the size actually
724 if ( (d
- orig
) == sizeof(tunnelt
) && size
< sizeof(tunnelt
) ) {
725 add_type(p
, C_CTUNNEL
, id
, c
, size
);
728 // Failed to compress : Fall through.
730 case C_TUNNEL
: add_type(p
, C_TUNNEL
, id
,
731 (char *) &tunnel
[id
], sizeof(tunnelt
));
734 LOG(0, 0, 0, "Found an invalid type in heart queue! (%d)\n", type
);
742 // Send a heartbeat, incidently sending out any queued changes..
744 void cluster_heartbeat()
746 int i
, count
= 0, tcount
= 0;
747 char buff
[MAX_HEART_SIZE
+ sizeof(heartt
) + sizeof(int) ];
751 if (!config
->cluster_iam_master
) // Only the master does this.
754 config
->cluster_table_version
+= config
->cluster_num_changes
;
756 // Fill out the heartbeat header.
757 memset(&h
, 0, sizeof(h
));
759 h
.version
= HB_VERSION
;
760 h
.seq
= config
->cluster_seq_number
;
761 h
.basetime
= basetime
;
762 h
.clusterid
= config
->bind_address
; // Will this do??
763 h
.basetime
= basetime
;
764 h
.highsession
= config
->cluster_highest_sessionid
;
765 h
.freesession
= sessionfree
;
766 h
.hightunnel
= config
->cluster_highest_tunnelid
;
767 h
.size_sess
= sizeof(sessiont
); // Just in case.
768 h
.size_tunn
= sizeof(tunnelt
);
769 h
.interval
= config
->cluster_hb_interval
;
770 h
.timeout
= config
->cluster_hb_timeout
;
771 h
.table_version
= config
->cluster_table_version
;
773 add_type(&p
, C_HEARTBEAT
, HB_VERSION
, (char *) &h
, sizeof(h
));
775 for (i
= 0; i
< config
->cluster_num_changes
; ++i
) {
776 hb_add_type(&p
, cluster_changes
[i
].type
, cluster_changes
[i
].id
);
779 if (p
> (buff
+ sizeof(buff
))) { // Did we somehow manage to overun the buffer?
780 LOG(0, 0, 0, "FATAL: Overran the heartbeat buffer! This is fatal. Exiting. (size %d)\n", (int) (p
- buff
));
786 // Fill out the packet with sessions from the session table...
787 // (not forgetting to leave space so we can get some tunnels in too )
788 while ( (p
+ sizeof(uint32_t) * 2 + sizeof(sessiont
) * 2 ) < (buff
+ MAX_HEART_SIZE
) ) {
790 if (!walk_session_number
) // session #0 isn't valid.
791 ++walk_session_number
;
793 if (count
>= config
->cluster_highest_sessionid
) // If we're a small cluster, don't go wild.
796 hb_add_type(&p
, C_CSESSION
, walk_session_number
);
797 walk_session_number
= (1+walk_session_number
)%(config
->cluster_highest_sessionid
+1); // +1 avoids divide by zero.
799 ++count
; // Count the number of extra sessions we're sending.
803 // Fill out the packet with tunnels from the tunnel table...
804 // This effectively means we walk the tunnel table more quickly
805 // than the session table. This is good because stuffing up a
806 // tunnel is a much bigger deal than stuffing up a session.
808 while ( (p
+ sizeof(uint32_t) * 2 + sizeof(tunnelt
) ) < (buff
+ MAX_HEART_SIZE
) ) {
810 if (!walk_tunnel_number
) // tunnel #0 isn't valid.
811 ++walk_tunnel_number
;
813 if (tcount
>= config
->cluster_highest_tunnelid
)
816 hb_add_type(&p
, C_CTUNNEL
, walk_tunnel_number
);
817 walk_tunnel_number
= (1+walk_tunnel_number
)%(config
->cluster_highest_tunnelid
+1); // +1 avoids divide by zero.
823 // Did we do something wrong?
824 if (p
> (buff
+ sizeof(buff
))) { // Did we somehow manage to overun the buffer?
825 LOG(0, 0, 0, "Overran the heartbeat buffer now! This is fatal. Exiting. (size %d)\n", (int) (p
- buff
));
830 LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64
" with %d changes "
831 "(%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n",
832 HB_VERSION
, h
.seq
, h
.table_version
, config
->cluster_num_changes
,
833 count
, tcount
, config
->cluster_highest_sessionid
,
834 config
->cluster_highest_tunnelid
, (int) (p
- buff
));
836 config
->cluster_num_changes
= 0;
838 send_heartbeat(h
.seq
, buff
, (p
-buff
) ); // Send out the heartbeat to the cluster, keeping a copy of it.
840 config
->cluster_seq_number
= (config
->cluster_seq_number
+1)%HB_MAX_SEQ
; // Next seq number to use.
844 // A structure of type 'type' has changed; Add it to the queue to send.
846 static int type_changed(int type
, int id
)
850 for (i
= 0 ; i
< config
->cluster_num_changes
; ++i
)
851 if ( cluster_changes
[i
].id
== id
&&
852 cluster_changes
[i
].type
== type
)
853 return 0; // Already marked for change.
855 cluster_changes
[i
].type
= type
;
856 cluster_changes
[i
].id
= id
;
857 ++config
->cluster_num_changes
;
859 if (config
->cluster_num_changes
> MAX_CHANGES
)
860 cluster_heartbeat(); // flush now
866 // A particular session has been changed!
867 int cluster_send_session(int sid
)
869 if (!config
->cluster_iam_master
) {
870 LOG(0, sid
, 0, "I'm not a master, but I just tried to change a session!\n");
875 LOG(0, sid
, 0, "cluster_send_session called from child process!\n");
879 return type_changed(C_CSESSION
, sid
);
882 // A particular tunnel has been changed!
883 int cluster_send_tunnel(int tid
)
885 if (!config
->cluster_iam_master
) {
886 LOG(0, 0, tid
, "I'm not a master, but I just tried to change a tunnel!\n");
890 return type_changed(C_CTUNNEL
, tid
);
895 // We're a master, and a slave has just told us that it's
896 // missed a packet. We'll resend it every packet since
897 // the last one it's seen.
899 static int cluster_catchup_slave(int seq
, in_addr_t slave
)
904 LOG(1, 0, 0, "Slave %s sent LASTSEEN with seq %d\n", fmtaddr(slave
, 0), seq
);
906 diff
= config
->cluster_seq_number
- seq
; // How many packet do we need to send?
910 if (diff
>= HB_HISTORY_SIZE
) { // Ouch. We don't have the packet to send it!
911 LOG(0, 0, 0, "A slave asked for message %d when our seq number is %d. Killing it.\n",
912 seq
, config
->cluster_seq_number
);
913 return peer_send_message(slave
, C_KILL
, seq
, NULL
, 0);// Kill the slave. Nothing else to do.
916 // Now resend every packet that it missed, in order.
917 while (seq
!= config
->cluster_seq_number
) {
918 s
= seq
%HB_HISTORY_SIZE
;
919 if (seq
!= past_hearts
[s
].seq
) {
920 LOG(0, 0, 0, "Tried to re-send heartbeat for %s but %d doesn't match %d! (%d,%d)\n",
921 fmtaddr(slave
, 0), seq
, past_hearts
[s
].seq
, s
, config
->cluster_seq_number
);
922 return -1; // What to do here!?
924 peer_send_data(slave
, past_hearts
[s
].data
, past_hearts
[s
].size
);
925 seq
= (seq
+1)%HB_MAX_SEQ
; // Increment to next seq number.
927 return 0; // All good!
931 // We've heard from another peer! Add it to the list
932 // that we select from at election time.
934 static int cluster_add_peer(in_addr_t peer
, time_t basetime
, pingt
*pp
, int size
)
940 // Allow for backward compatability.
941 // Just the ping packet into a new structure to allow
942 // for the possibility that we might have received
943 // more or fewer elements than we were expecting.
944 if (size
> sizeof(p
))
947 memset( (void *) &p
, 0, sizeof(p
) );
948 memcpy( (void *) &p
, (void *) pp
, size
);
951 if (clusterid
!= config
->bind_address
)
954 LOG(4, 0, 0, "Skipping ping from %s (different cluster)\n", fmtaddr(peer
, 0));
958 for (i
= 0; i
< num_peers
; ++i
)
960 if (peers
[i
].peer
!= peer
)
963 // This peer already exists. Just update the timestamp.
964 peers
[i
].basetime
= basetime
;
965 peers
[i
].timestamp
= TIME
;
966 peers
[i
].uptodate
= !p
.undef
;
970 // Is this the master shutting down??
971 if (peer
== config
->cluster_master_address
&& !basetime
) {
972 LOG(3, 0, 0, "Master %s shutting down...\n", fmtaddr(config
->cluster_master_address
, 0));
973 config
->cluster_master_address
= 0;
974 config
->cluster_last_hb
= 0; // Force an election.
975 cluster_check_master();
981 LOG(4, 0, 0, "Adding %s as a peer\n", fmtaddr(peer
, 0));
983 // Not found. Is there a stale slot to re-use?
984 for (i
= 0; i
< num_peers
; ++i
)
986 if (!peers
[i
].basetime
) // Shutdown
989 if ((peers
[i
].timestamp
+ config
->cluster_hb_timeout
* 10) < TIME
) // Stale.
993 if (i
>= CLUSTER_MAX_SIZE
)
996 LOG(0, 0, 0, "Tried to add %s as a peer, but I already have %d of them!\n", fmtaddr(peer
, 0), i
);
1000 peers
[i
].peer
= peer
;
1001 peers
[i
].basetime
= basetime
;
1002 peers
[i
].timestamp
= TIME
;
1003 peers
[i
].uptodate
= !p
.undef
;
1007 LOG(1, 0, 0, "Added %s as a new peer. Now %d peers\n", fmtaddr(peer
, 0), num_peers
);
1013 /* Handle the slave updating the byte counters for the master. */
1015 // Note that we don't mark the session as dirty; We rely on
1016 // the slow table walk to propogate this back out to the slaves.
1018 static int cluster_handle_bytes(char *data
, int size
)
1022 b
= (bytest
*) data
;
1024 LOG(3, 0, 0, "Got byte counter update (size %d)\n", size
);
1026 /* Loop around, adding the byte
1027 counts to each of the sessions. */
1029 while (size
>= sizeof(*b
) ) {
1030 if (b
->sid
> MAXSESSION
) {
1031 LOG(0, 0, 0, "Got C_BYTES with session #%d!\n", b
->sid
);
1032 return -1; /* Abort processing */
1035 session
[b
->sid
].total_cin
+= b
->in
;
1036 session
[b
->sid
].total_cout
+= b
->out
;
1038 session
[b
->sid
].cin
+= b
->in
;
1039 session
[b
->sid
].cout
+= b
->out
;
1042 session
[b
->sid
].last_packet
= time_now
; // Reset idle timer!
1049 LOG(0, 0, 0, "Got C_BYTES with %d bytes of trailing junk!\n", size
);
1055 // Handle receiving a session structure in a heartbeat packet.
1057 static int cluster_recv_session(int more
, uint8_t *p
)
1059 if (more
>= MAXSESSION
) {
1060 LOG(0, 0, 0, "DANGER: Received a heartbeat session id > MAXSESSION!\n");
1064 if (session
[more
].tunnel
== T_UNDEF
) {
1065 if (config
->cluster_iam_uptodate
) { // Sanity.
1066 LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined session!\n");
1068 --config
->cluster_undefined_sessions
;
1072 load_session(more
, (sessiont
*) p
); // Copy session into session table..
1074 LOG(5, more
, 0, "Received session update (%d undef)\n", config
->cluster_undefined_sessions
);
1076 if (!config
->cluster_iam_uptodate
)
1077 cluster_uptodate(); // Check to see if we're up to date.
1082 static int cluster_recv_tunnel(int more
, uint8_t *p
)
1084 if (more
>= MAXTUNNEL
) {
1085 LOG(0, 0, 0, "DANGER: Received a tunnel session id > MAXTUNNEL!\n");
1089 if (tunnel
[more
].state
== TUNNELUNDEF
) {
1090 if (config
->cluster_iam_uptodate
) { // Sanity.
1091 LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined tunnel!\n");
1093 --config
->cluster_undefined_tunnels
;
1097 memcpy(&tunnel
[more
], p
, sizeof(tunnel
[more
]) );
1100 // Clear tunnel control messages. These are dynamically allocated.
1101 // If we get unlucky, this may cause the tunnel to drop!
1103 tunnel
[more
].controls
= tunnel
[more
].controle
= NULL
;
1104 tunnel
[more
].controlc
= 0;
1106 LOG(5, 0, more
, "Received tunnel update\n");
1108 if (!config
->cluster_iam_uptodate
)
1109 cluster_uptodate(); // Check to see if we're up to date.
1115 // pre v5 heartbeat session structure
1122 unsigned long unique_id
;
1129 uint32_t total_cout
;
1131 uint16_t throttle_in
;
1132 uint16_t throttle_out
;
1136 in_addr_t dns1
, dns2
;
1137 routet route
[MAXROUTE
];
1143 uint8_t reserved_old_snoop
;
1144 uint8_t walled_garden
;
1146 char random_vector
[MAXTEL
];
1147 int random_vector_length
;
1149 char called
[MAXTEL
];
1150 char calling
[MAXTEL
];
1151 uint32_t tx_connect_speed
;
1152 uint32_t rx_connect_speed
;
1155 uint16_t snoop_port
;
1162 static uint8_t *convert_session(struct oldsession
*old
)
1164 static sessiont
new;
1167 memset(&new, 0, sizeof(new));
1169 new.next
= old
->next
;
1171 new.tunnel
= old
->tunnel
;
1172 new.l2tp_flags
= old
->l2tp_flags
;
1173 new.flags
= old
->flags
;
1175 new.ip_pool_index
= old
->ip_pool_index
;
1176 new.unique_id
= old
->unique_id
;
1179 new.magic
= old
->magic
;
1181 new.cout
= old
->cout
;
1183 new.pout
= old
->pout
;
1184 new.total_cin
= old
->total_cin
;
1185 new.total_cout
= old
->total_cout
;
1186 new.throttle_in
= old
->throttle_in
;
1187 new.throttle_out
= old
->throttle_out
;
1188 new.filter_in
= old
->filter_in
;
1189 new.filter_out
= old
->filter_out
;
1191 new.opened
= old
->opened
;
1193 new.last_packet
= old
->last_packet
;
1194 new.dns1
= old
->dns1
;
1195 new.dns2
= old
->dns2
;
1196 new.tbf_in
= old
->tbf_in
;
1197 new.tbf_out
= old
->tbf_out
;
1198 new.random_vector_length
= old
->random_vector_length
;
1199 new.tx_connect_speed
= old
->tx_connect_speed
;
1200 new.rx_connect_speed
= old
->rx_connect_speed
;
1201 new.snoop_ip
= old
->snoop_ip
;
1202 new.snoop_port
= old
->snoop_port
;
1203 new.walled_garden
= old
->walled_garden
;
1205 memcpy(new.random_vector
, old
->random_vector
, sizeof(new.random_vector
));
1206 memcpy(new.user
, old
->user
, sizeof(new.user
));
1207 memcpy(new.called
, old
->called
, sizeof(new.called
));
1208 memcpy(new.calling
, old
->calling
, sizeof(new.calling
));
1210 for (i
= 0; i
< MAXROUTE
; i
++)
1211 memcpy(&new.route
[i
], &old
->route
[i
], sizeof(new.route
[i
]));
1213 return (uint8_t *) &new;
1217 // Process a heartbeat..
1219 // v3: added interval, timeout
1220 // v4: added table_version
1221 // v5: added ipv6, re-ordered session structure
1222 static int cluster_process_heartbeat(uint8_t *data
, int size
, int more
, uint8_t *p
, in_addr_t addr
)
1225 int s
= size
- (p
-data
);
1230 # error "need to update cluster_process_heartbeat()"
1233 // we handle versions 3 through 5
1234 if (hb_ver
< 3 || hb_ver
> HB_VERSION
) {
1235 LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", hb_ver
);
1236 return -1; // Ignore it??
1239 // Ok. It's a heartbeat packet from a cluster master!
1247 if (h
->clusterid
!= config
->bind_address
)
1248 return -1; // It's not part of our cluster.
1250 if (config
->cluster_iam_master
) { // Sanity...
1251 // Note that this MUST match the election process above!
1253 LOG(0, 0, 0, "I just got a heartbeat from master %s, but _I_ am the master!\n", fmtaddr(addr
, 0));
1255 LOG(0, 0, 0, "Heartbeat with zero basetime! Ignoring\n");
1256 return -1; // Skip it.
1260 if (h
->table_version
> config
->cluster_table_version
) {
1261 LOG(0, 0, 0, "They've seen more state changes (%" PRIu64
" vs my %" PRIu64
") so I'm gone!\n",
1262 h
->table_version
, config
->cluster_table_version
);
1267 if (h
->table_version
< config
->cluster_table_version
)
1271 if (basetime
> h
->basetime
) {
1272 LOG(0, 0, 0, "They're an older master than me so I'm gone!\n");
1277 if (basetime
< h
->basetime
)
1280 if (my_address
< addr
) { // Tie breaker.
1281 LOG(0, 0, 0, "They're a higher IP address than me, so I'm gone!\n");
1286 return -1; // Skip it.
1289 if (config
->cluster_seq_number
== -1) // Don't have one. Just align to the master...
1290 config
->cluster_seq_number
= h
->seq
;
1292 config
->cluster_last_hb
= TIME
; // Reset to ensure that we don't become master!!
1294 if (config
->cluster_seq_number
!= h
->seq
) { // Out of sequence heartbeat!
1295 static int lastseen_seq
= 0;
1296 static time_t lastseen_time
= 0;
1298 // limit to once per second for a particular seq#
1299 int ask
= (config
->cluster_seq_number
!= lastseen_seq
|| time_now
!= lastseen_time
);
1301 LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. %s.\n",
1302 h
->seq
, config
->cluster_seq_number
,
1303 ask
? "Asking for resend" : "Ignoring");
1307 lastseen_seq
= config
->cluster_seq_number
;
1308 lastseen_time
= time_now
;
1309 peer_send_message(addr
, C_LASTSEEN
, config
->cluster_seq_number
, NULL
, 0);
1312 config
->cluster_last_hb
= TIME
; // Reset to ensure that we don't become master!!
1314 // Just drop the packet. The master will resend it as part of the catchup.
1318 // Save the packet in our buffer.
1319 // This is needed in case we become the master.
1320 config
->cluster_seq_number
= (h
->seq
+1)%HB_MAX_SEQ
;
1321 i
= h
->seq
% HB_HISTORY_SIZE
;
1322 past_hearts
[i
].seq
= h
->seq
;
1323 past_hearts
[i
].size
= size
;
1324 memcpy(&past_hearts
[i
].data
, data
, size
); // Save it.
1327 // Check that we don't have too many undefined sessions, and
1328 // that the free session pointer is correct.
1329 cluster_check_sessions(h
->highsession
, h
->freesession
, h
->hightunnel
);
1331 if (h
->interval
!= config
->cluster_hb_interval
)
1333 LOG(2, 0, 0, "Master set ping/heartbeat interval to %u (was %u)\n",
1334 h
->interval
, config
->cluster_hb_interval
);
1336 config
->cluster_hb_interval
= h
->interval
;
1339 if (h
->timeout
!= config
->cluster_hb_timeout
)
1341 LOG(2, 0, 0, "Master set heartbeat timeout to %u (was %u)\n",
1342 h
->timeout
, config
->cluster_hb_timeout
);
1344 config
->cluster_hb_timeout
= h
->timeout
;
1347 // Ok. process the packet...
1350 type
= *((uint32_t *) p
);
1351 p
+= sizeof(uint32_t);
1352 s
-= sizeof(uint32_t);
1354 more
= *((uint32_t *) p
);
1355 p
+= sizeof(uint32_t);
1356 s
-= sizeof(uint32_t);
1359 case C_CSESSION
: { // Compressed session structure.
1360 uint8_t c
[ sizeof(sessiont
) + 2];
1362 uint8_t *orig_p
= p
;
1364 size
= rle_decompress((uint8_t **) &p
, s
, c
, sizeof(c
) );
1367 // session struct changed with v5
1370 if (size
!= sizeof(struct oldsession
)) {
1371 LOG(0, 0, 0, "DANGER: Received a v%d CSESSION that didn't decompress correctly!\n", hb_ver
);
1372 // Now what? Should exit! No-longer up to date!
1375 cluster_recv_session(more
, convert_session((struct oldsession
*) c
));
1379 if (size
!= sizeof(sessiont
) ) { // Ouch! Very very bad!
1380 LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
1381 // Now what? Should exit! No-longer up to date!
1385 cluster_recv_session(more
, c
);
1391 if (s
< sizeof(struct oldsession
))
1394 cluster_recv_session(more
, convert_session((struct oldsession
*) p
));
1396 p
+= sizeof(struct oldsession
);
1397 s
-= sizeof(struct oldsession
);
1401 if ( s
< sizeof(session
[more
]))
1404 cluster_recv_session(more
, p
);
1406 p
+= sizeof(session
[more
]);
1407 s
-= sizeof(session
[more
]);
1410 case C_CTUNNEL
: { // Compressed tunnel structure.
1411 uint8_t c
[ sizeof(tunnelt
) + 2];
1413 uint8_t *orig_p
= p
;
1415 size
= rle_decompress((uint8_t **) &p
, s
, c
, sizeof(c
));
1418 if (size
!= sizeof(tunnelt
) ) { // Ouch! Very very bad!
1419 LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
1420 // Now what? Should exit! No-longer up to date!
1424 cluster_recv_tunnel(more
, c
);
1429 if ( s
< sizeof(tunnel
[more
]))
1432 cluster_recv_tunnel(more
, p
);
1434 p
+= sizeof(tunnel
[more
]);
1435 s
-= sizeof(tunnel
[more
]);
1438 LOG(0, 0, 0, "DANGER: I received a heartbeat element where I didn't understand the type! (%d)\n", type
);
1439 return -1; // can't process any more of the packet!!
1443 if (config
->cluster_master_address
!= addr
)
1445 LOG(0, 0, 0, "My master just changed from %s to %s!\n",
1446 fmtaddr(config
->cluster_master_address
, 0), fmtaddr(addr
, 1));
1448 config
->cluster_master_address
= addr
;
1451 config
->cluster_last_hb
= TIME
; // Successfully received a heartbeat!
1452 config
->cluster_table_version
= h
->table_version
;
1456 LOG(0, 0, 0, "I got an incomplete heartbeat packet! This means I'm probably out of sync!!\n");
1461 // We got a packet on the cluster port!
1462 // Handle pings, lastseens, and heartbeats!
1464 int processcluster(char *data
, int size
, in_addr_t addr
)
1470 if (addr
== my_address
)
1471 return -1; // Ignore it. Something looped back the multicast!
1473 LOG(5, 0, 0, "Process cluster: %d bytes from %s\n", size
, fmtaddr(addr
, 0));
1475 if (s
<= 0) // Any data there??
1481 type
= *((uint32_t *) p
);
1482 p
+= sizeof(uint32_t);
1483 s
-= sizeof(uint32_t);
1485 more
= *((uint32_t *) p
);
1486 p
+= sizeof(uint32_t);
1487 s
-= sizeof(uint32_t);
1490 case C_PING
: // Update the peers table.
1491 return cluster_add_peer(addr
, more
, (pingt
*) p
, s
);
1493 case C_LASTSEEN
: // Catch up a slave (slave missed a packet).
1494 return cluster_catchup_slave(more
, addr
);
1496 case C_FORWARD
: { // Forwarded control packet. pass off to processudp.
1497 struct sockaddr_in a
;
1498 a
.sin_addr
.s_addr
= more
;
1500 a
.sin_port
= *(int *) p
;
1504 if (!config
->cluster_iam_master
) { // huh?
1505 LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD from %s?\n", fmtaddr(addr
, 0));
1509 LOG(4, 0, 0, "Got a forwarded packet... (%s:%d)\n", fmtaddr(more
, 0), a
.sin_port
);
1511 processudp(p
, s
, &a
);
1514 case C_THROTTLE
: { // Receive a forwarded packet from a slave.
1515 if (!config
->cluster_iam_master
) {
1516 LOG(0, 0, 0, "I'm not the master, but I got a C_THROTTLE from %s?\n", fmtaddr(addr
, 0));
1520 tbf_queue_packet(more
, p
, s
); // The TBF id tells wether it goes in or out.
1524 // Receive a walled garden packet from a slave.
1525 if (!config
->cluster_iam_master
) {
1526 LOG(0, 0, 0, "I'm not the master, but I got a C_GARDEN from %s?\n", fmtaddr(addr
, 0));
1534 return cluster_handle_bytes(p
, s
);
1536 case C_KILL
: // The master asked us to die!? (usually because we're too out of date).
1537 if (config
->cluster_iam_master
) {
1538 LOG(0, 0, 0, "_I_ am master, but I received a C_KILL from %s! (Seq# %d)\n", fmtaddr(addr
, 0), more
);
1541 if (more
!= config
->cluster_seq_number
) {
1542 LOG(0, 0, 0, "The master asked us to die but the seq number didn't match!?\n");
1546 if (addr
!= config
->cluster_master_address
) {
1547 LOG(0, 0, 0, "Received a C_KILL from %s which doesn't match config->cluster_master_address (%s)\n",
1548 fmtaddr(addr
, 0), fmtaddr(config
->cluster_master_address
, 1));
1549 // We can only warn about it. The master might really have switched!
1552 LOG(0, 0, 0, "Received a valid C_KILL: I'm going to die now.\n");
1554 exit(0); // Lets be paranoid;
1555 return -1; // Just signalling the compiler.
1558 LOG(4, 0, 0, "Got a heartbeat from %s\n", fmtaddr(addr
, 0));
1559 return cluster_process_heartbeat(data
, size
, more
, p
, addr
);
1562 LOG(0, 0, 0, "Strange type packet received on cluster socket (%d)\n", type
);
1568 LOG(0, 0, 0, "I got a _short_ cluster heartbeat packet! This means I'm probably out of sync!!\n");
1572 //====================================================================================================
1574 int cmd_show_cluster(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
1578 if (CLI_HELP_REQUESTED
)
1579 return CLI_HELP_NO_ARGS
;
1581 cli_print(cli
, "Cluster status : %s", config
->cluster_iam_master
? "Master" : "Slave" );
1582 cli_print(cli
, "My address : %s", fmtaddr(my_address
, 0));
1583 cli_print(cli
, "VIP address : %s", fmtaddr(config
->bind_address
, 0));
1584 cli_print(cli
, "Multicast address: %s", fmtaddr(config
->cluster_address
, 0));
1585 cli_print(cli
, "Multicast i'face : %s", config
->cluster_interface
);
1587 if (!config
->cluster_iam_master
) {
1588 cli_print(cli
, "My master : %s (last heartbeat %.1f seconds old)",
1589 config
->cluster_master_address
1590 ? fmtaddr(config
->cluster_master_address
, 0)
1592 0.1 * (TIME
- config
->cluster_last_hb
));
1593 cli_print(cli
, "Uptodate : %s", config
->cluster_iam_uptodate
? "Yes" : "No");
1594 cli_print(cli
, "Table version # : %" PRIu64
, config
->cluster_table_version
);
1595 cli_print(cli
, "Next sequence number expected: %d", config
->cluster_seq_number
);
1596 cli_print(cli
, "%d sessions undefined of %d", config
->cluster_undefined_sessions
, config
->cluster_highest_sessionid
);
1597 cli_print(cli
, "%d tunnels undefined of %d", config
->cluster_undefined_tunnels
, config
->cluster_highest_tunnelid
);
1599 cli_print(cli
, "Table version # : %" PRIu64
, config
->cluster_table_version
);
1600 cli_print(cli
, "Next heartbeat # : %d", config
->cluster_seq_number
);
1601 cli_print(cli
, "Highest session : %d", config
->cluster_highest_sessionid
);
1602 cli_print(cli
, "Highest tunnel : %d", config
->cluster_highest_tunnelid
);
1603 cli_print(cli
, "%d changes queued for sending", config
->cluster_num_changes
);
1605 cli_print(cli
, "%d peers.", num_peers
);
1608 cli_print(cli
, "%20s %10s %8s", "Address", "Basetime", "Age");
1609 for (i
= 0; i
< num_peers
; ++i
) {
1610 cli_print(cli
, "%20s %10u %8d", fmtaddr(peers
[i
].peer
, 0),
1611 peers
[i
].basetime
, TIME
- peers
[i
].timestamp
);
1617 // Simple run-length-encoding compression.
1619 // 1 byte < 128 = count of non-zero bytes following. // Not legal to be zero.
1620 // n non-zero bytes;
1622 // 1 byte > 128 = (count - 128) run of zero bytes. //
1624 // count == 0 indicates end of compressed stream.
1626 // Compress from 'src' into 'dst'. return number of bytes
1628 // Updates *src_p to indicate 1 past last bytes used.
1630 // We could get an extra byte in the zero runs by storing (count-1)
1631 // but I'm playing it safe.
1633 // Worst case is a 50% expansion in space required (trying to
1634 // compress { 0x00, 0x01 } * N )
1635 static int rle_compress(uint8_t **src_p
, int ssize
, uint8_t *dst
, int dsize
)
1638 int orig_dsize
= dsize
;
1642 while (ssize
> 0 && dsize
> 2) {
1644 x
= dst
++; --dsize
; // Reserve space for count byte..
1646 if (*src
) { // Copy a run of non-zero bytes.
1647 while (*src
&& count
< 127 && ssize
> 0 && dsize
> 1) { // Count number of non-zero bytes.
1652 *x
= count
; // Store number of non-zero bytes. Guarenteed to be non-zero!
1654 } else { // Compress a run of zero bytes.
1655 while (*src
== 0 && count
< 127 && ssize
> 0) {
1664 *dst
++ = 0x0; // Add Stop byte.
1668 return (orig_dsize
- dsize
);
1672 // Decompress the buffer into **p.
1673 // 'psize' is the size of the decompression buffer available.
1675 // Returns the number of bytes decompressed.
1677 // Decompresses from '*src_p' into 'dst'.
1678 // Return the number of dst bytes used.
1679 // Updates the 'src_p' pointer to point to the
1680 // first un-used byte.
1681 static int rle_decompress(uint8_t **src_p
, int ssize
, uint8_t *dst
, int dsize
)
1684 int orig_dsize
= dsize
;
1687 while (ssize
>0 && dsize
> 0) { // While there's more to decompress, and there's room in the decompress buffer...
1688 count
= *src
++; --ssize
; // get the count byte from the source.
1689 if (count
== 0x0) // End marker reached? If so, finish.
1692 if (count
& 0x80) { // Decompress a run of zeros
1693 for (count
&= 0x7f ; count
> 0 && dsize
> 0; --count
) {
1697 } else { // Copy run of non-zero bytes.
1698 for ( ; count
> 0 && ssize
&& dsize
; --count
) { // Copy non-zero bytes across.
1705 return (orig_dsize
- dsize
);