// L2TPNS Clustering Stuff
-char const *cvs_id_cluster = "$Id: cluster.c,v 1.40 2005/06/02 11:32:30 bodea Exp $";
+char const *cvs_id_cluster = "$Id: cluster.c,v 1.49 2005/12/05 14:10:42 bodea Exp $";
#include <stdio.h>
#include <stdlib.h>
*/
// Module variables.
-int cluster_sockfd = 0; // The filedescriptor for the cluster communications port.
+extern int cluster_sockfd; // The filedescriptor for the cluster communications port.
in_addr_t my_address = 0; // The network address of my ethernet port.
static int walk_session_number = 0; // The next session to send when doing the slow table walk.
static struct {
int seq;
int size;
- char data[MAX_HEART_SIZE];
+ uint8_t data[MAX_HEART_SIZE];
} past_hearts[HB_HISTORY_SIZE]; // Ring buffer of heartbeats that we've recently sent out. Needed so
// we can re-transmit if needed.
opt = 0; // Turn off multicast loopback.
setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &opt, sizeof(opt));
+ if (config->cluster_mcast_ttl != 1)
+ {
+ uint8_t ttl = 0;
+ if (config->cluster_mcast_ttl > 0)
+ ttl = config->cluster_mcast_ttl < 256 ? config->cluster_mcast_ttl : 255;
+
+ setsockopt(cluster_sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));
+ }
+
if (setsockopt(cluster_sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)
{
LOG(0, 0, 0, "Failed to setsockopt (join mcast group): %s\n", strerror(errno));
// Maintains the format. Assumes that the caller
// has passed in a big enough buffer!
//
-static void add_type(char **p, int type, int more, char *data, int size)
+static void add_type(uint8_t **p, int type, int more, uint8_t *data, int size)
{
*((uint32_t *) (*p)) = type;
*p += sizeof(uint32_t);
// Send a unicast UDP packet to a peer with 'data' as the
// contents.
//
-static int peer_send_data(in_addr_t peer, char *data, int size)
+static int peer_send_data(in_addr_t peer, uint8_t *data, int size)
{
struct sockaddr_in addr = {0};
//
// Send a structured message to a peer with a single element of type 'type'.
//
-static int peer_send_message(in_addr_t peer, int type, int more, char *data, int size)
+static int peer_send_message(in_addr_t peer, int type, int more, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
LOG(4, 0, 0, "Sending message to peer (type %d, more %d, size %d)\n", type, more, size);
add_type(&p, type, more, data, size);
return peer_send_data(peer, buf, (p-buf) );
}
-//
-// Forward a state changing packet to the master.
-//
-// The master just processes the payload as if it had
-// received it off the tun device.
-//
-int master_forward_packet(char *data, int size, in_addr_t addr, int port)
+// send a packet to the master
+static int _forward_packet(uint8_t *data, int size, in_addr_t addr, int port, int type)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
LOG(4, 0, 0, "Forwarding packet from %s to master (size %d)\n", fmtaddr(addr, 0), size);
STAT(c_forwarded);
- add_type(&p, C_FORWARD, addr, (char *) &port, sizeof(port)); // ick. should be uint16_t
+ add_type(&p, type, addr, (uint8_t *) &port, sizeof(port)); // ick. should be uint16_t
memcpy(p, data, size);
p += size;
return peer_send_data(config->cluster_master_address, buf, (p - buf));
}
+//
+// Forward a state changing packet to the master.
+//
+// The master just processes the payload as if it had
+// received it off the tun device.
+//
+int master_forward_packet(uint8_t *data, int size, in_addr_t addr, int port)
+{
+ return _forward_packet(data, size, addr, port, C_FORWARD);
+}
+
+// Forward a DAE RADIUS packet to the master.
+int master_forward_dae_packet(uint8_t *data, int size, in_addr_t addr, int port)
+{
+ return _forward_packet(data, size, addr, port, C_FORWARD_DAE);
+}
+
//
// Forward a throttled packet to the master for handling.
//
// token bucket queue, and lets normal processing take care
// of it.
//
-int master_throttle_packet(int tbfid, char *data, int size)
+int master_throttle_packet(int tbfid, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
//
// (Note that this must be called with the tun header
// as the start of the data).
-int master_garden_packet(sessionidt s, char *data, int size)
+int master_garden_packet(sessionidt s, uint8_t *data, int size)
{
- char buf[65536]; // Vast overkill.
- char *p = buf;
+ uint8_t buf[65536]; // Vast overkill.
+ uint8_t *p = buf;
if (!config->cluster_master_address) // No election has been held yet. Just skip it.
return -1;
// Send a chunk of data as a heartbeat..
// We save it in the history buffer as we do so.
//
-static void send_heartbeat(int seq, char *data, int size)
+static void send_heartbeat(int seq, uint8_t *data, int size)
{
int i;
//
void cluster_send_ping(time_t basetime)
{
- char buff[100 + sizeof(pingt)];
- char *p = buff;
+ uint8_t buff[100 + sizeof(pingt)];
+ uint8_t *p = buff;
pingt x;
if (config->cluster_iam_master && basetime) // We're heartbeating so no need to ping.
x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels;
x.basetime = basetime;
- add_type(&p, C_PING, basetime, (char *) &x, sizeof(x));
+ add_type(&p, C_PING, basetime, (uint8_t *) &x, sizeof(x));
cluster_send_data(buff, (p-buff) );
}
// Forward the data to the master.
LOG(4, 0, 0, "Sending byte counters to master (%d elements)\n", c);
- peer_send_message(config->cluster_master_address, C_BYTES, c, (char *) &b, sizeof(b[0]) * c);
+ peer_send_message(config->cluster_master_address, C_BYTES, c, (uint8_t *) &b, sizeof(b[0]) * c);
return;
}
return; // Everything's ok!
config->cluster_last_hb = TIME + 1; // Just the one election thanks.
+ config->cluster_master_address = 0;
LOG(0, 0, 0, "Master timed out! Holding election...\n");
// to become a master!!!
config->cluster_iam_master = 1;
- config->cluster_master_address = 0;
LOG(0, 0, 0, "I am declaring myself the master!\n");
cluster_uptodate();
}
-static int hb_add_type(char **p, int type, int id)
+static int hb_add_type(uint8_t **p, int type, int id)
{
switch (type) {
case C_CSESSION: { // Compressed C_SESSION.
// Did we compress the full structure, and is the size actually
// reduced??
if ( (d - orig) == sizeof(sessiont) && size < sizeof(sessiont) ) {
- add_type(p, C_CSESSION, id, (char *) c, size);
+ add_type(p, C_CSESSION, id, c, size);
break;
}
// Failed to compress : Fall through.
}
- case C_SESSION: add_type(p, C_SESSION, id,
- (char *) &session[id], sizeof(sessiont));
+ case C_SESSION:
+ add_type(p, C_SESSION, id, (uint8_t *) &session[id], sizeof(sessiont));
break;
case C_CTUNNEL: { // Compressed C_TUNNEL
}
// Failed to compress : Fall through.
}
- case C_TUNNEL: add_type(p, C_TUNNEL, id,
- (char *) &tunnel[id], sizeof(tunnelt));
+ case C_TUNNEL:
+ add_type(p, C_TUNNEL, id, (uint8_t *) &tunnel[id], sizeof(tunnelt));
break;
default:
LOG(0, 0, 0, "Found an invalid type in heart queue! (%d)\n", type);
void cluster_heartbeat()
{
int i, count = 0, tcount = 0;
- char buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ];
+ uint8_t buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ];
heartt h;
- char *p = buff;
+ uint8_t *p = buff;
if (!config->cluster_iam_master) // Only the master does this.
return;
h.timeout = config->cluster_hb_timeout;
h.table_version = config->cluster_table_version;
- add_type(&p, C_HEARTBEAT, HB_VERSION, (char *) &h, sizeof(h));
+ add_type(&p, C_HEARTBEAT, HB_VERSION, (uint8_t *) &h, sizeof(h));
for (i = 0; i < config->cluster_num_changes; ++i) {
hb_add_type(&p, cluster_changes[i].type, cluster_changes[i].id);
config->cluster_master_address = 0;
config->cluster_last_hb = 0; // Force an election.
cluster_check_master();
- return 0;
}
if (i >= num_peers)
fmtaddr(master, 1));
config->cluster_master_address = master;
+ if (master)
+ {
+ // catchup with new master
+ peer_send_message(master, C_LASTSEEN, config->cluster_seq_number, NULL, 0);
+
+ // delay next election
+ config->cluster_last_hb = TIME;
+ }
+
+ // run election (or reset "probed" if master was set)
cluster_check_master();
return 0;
}
// Note that we don't mark the session as dirty; We rely on
// the slow table walk to propogate this back out to the slaves.
//
-static int cluster_handle_bytes(char *data, int size)
+static int cluster_handle_bytes(uint8_t *data, int size)
{
bytest *b;
uint32_t tx_connect_speed;
uint32_t rx_connect_speed;
uint32_t flags;
+#define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack?
+#define SF_LCP_ACKED 2 // LCP negotiated
+#define SF_CCP_ACKED 4 // CCP negotiated
in_addr_t snoop_ip;
uint16_t snoop_port;
uint16_t sid;
new.next = old->next;
new.far = old->far;
new.tunnel = old->tunnel;
- new.l2tp_flags = old->l2tp_flags;
- new.flags = old->flags;
+ new.flags = old->l2tp_flags;
new.ip = old->ip;
new.ip_pool_index = old->ip_pool_index;
new.unique_id = old->unique_id;
- new.nr = old->nr;
- new.ns = old->ns;
new.magic = old->magic;
new.pin = old->pin;
new.pout = old->pout;
for (i = 0; i < MAXROUTE; i++)
memcpy(&new.route[i], &old->route[i], sizeof(new.route[i]));
+ if (new.opened)
+ {
+ new.ppp.phase = Establish;
+ if (old->flags & (SF_IPCP_ACKED|SF_LCP_ACKED))
+ {
+ new.ppp.phase = Network;
+ new.ppp.lcp = Opened;
+ new.ppp.ipcp = (old->flags & SF_IPCP_ACKED) ? Opened : Starting;
+ new.ppp.ccp = (old->flags & SF_CCP_ACKED) ? Opened : Stopped;
+ }
+
+ // no PPPv6 in old session
+ new.ppp.ipv6cp = Stopped;
+ }
+
return (uint8_t *) &new;
}
// Note that after a clean failover, the cluster_master_address
// is cleared, so this doesn't run.
//
- if (config->cluster_master_address && addr != config->cluster_master_address
- && (config->cluster_last_hb + config->cluster_hb_timeout - 11) > TIME) {
+ if (config->cluster_master_address && addr != config->cluster_master_address) {
LOG(0, 0, 0, "Ignoring stray heartbeat from %s, current master %s has not yet timed out (last heartbeat %.1f seconds ago).\n",
fmtaddr(addr, 0), fmtaddr(config->cluster_master_address, 1),
0.1 * (TIME - config->cluster_last_hb));
s -= (p - orig_p);
if (size != sizeof(tunnelt) ) { // Ouch! Very very bad!
- LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n");
+ LOG(0, 0, 0, "DANGER: Received a CTUNNEL that didn't decompress correctly!\n");
// Now what? Should exit! No-longer up to date!
break;
}
// We got a packet on the cluster port!
// Handle pings, lastseens, and heartbeats!
//
-int processcluster(char *data, int size, in_addr_t addr)
+int processcluster(uint8_t *data, int size, in_addr_t addr)
{
int type, more;
- char *p = data;
+ uint8_t *p = data;
int s = size;
if (addr == my_address)
p += sizeof(uint32_t);
s -= sizeof(uint32_t);
- switch (type) {
+ switch (type)
+ {
case C_PING: // Update the peers table.
return cluster_add_peer(addr, more, (pingt *) p, s);
case C_LASTSEEN: // Catch up a slave (slave missed a packet).
return cluster_catchup_slave(more, addr);
- case C_FORWARD: { // Forwarded control packet. pass off to processudp.
- struct sockaddr_in a;
- a.sin_addr.s_addr = more;
-
- a.sin_port = *(int *) p;
- s -= sizeof(int);
- p += sizeof(int);
+ case C_FORWARD: // Forwarded control packet. pass off to processudp.
+ case C_FORWARD_DAE: // Forwarded DAE packet. pass off to processdae.
+ if (!config->cluster_iam_master)
+ {
+ LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD_%s from %s?\n",
+ type == C_FORWARD_DAE ? "_DAE" : "", fmtaddr(addr, 0));
- if (!config->cluster_iam_master) { // huh?
- LOG(0, 0, 0, "I'm not the master, but I got a C_FORWARD from %s?\n", fmtaddr(addr, 0));
return -1;
}
+ else
+ {
+ struct sockaddr_in a;
+ a.sin_addr.s_addr = more;
+
+ a.sin_port = *(int *) p;
+ s -= sizeof(int);
+ p += sizeof(int);
+
+ LOG(4, 0, 0, "Got a forwarded %spacket... (%s:%d)\n",
+ type == C_FORWARD_DAE ? "DAE " : "", fmtaddr(more, 0), a.sin_port);
+
+ STAT(recv_forward);
+ if (type == C_FORWARD_DAE)
+ processdae(p, s, &a, sizeof(a));
+ else
+ processudp(p, s, &a);
+
+ return 0;
+ }
- LOG(4, 0, 0, "Got a forwarded packet... (%s:%d)\n", fmtaddr(more, 0), a.sin_port);
- STAT(recv_forward);
- processudp(p, s, &a);
- return 0;
- }
case C_THROTTLE: { // Receive a forwarded packet from a slave.
if (!config->cluster_iam_master) {
LOG(0, 0, 0, "I'm not the master, but I got a C_THROTTLE from %s?\n", fmtaddr(addr, 0));
{
int count;
int orig_dsize = dsize;
- char *src = *src_p;
+ uint8_t *src = *src_p;
while (ssize >0 && dsize > 0) { // While there's more to decompress, and there's room in the decompress buffer...
count = *src++; --ssize; // get the count byte from the source.
projects / l2tpns.git / blobdiff