X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/4d7d7850b5d242bf9b77ac07e7c06ef523c627e6..426335628c7676e41986c690f0a3307aa4ac8030:/cluster.c?ds=sidebyside diff --git a/cluster.c b/cluster.c index 808ab84..015268a 100644 --- a/cluster.c +++ b/cluster.c @@ -1,6 +1,6 @@ // L2TPNS Clustering Stuff -char const *cvs_id_cluster = "$Id: cluster.c,v 1.26 2004/12/16 23:40:31 bodea Exp $"; +char const *cvs_id_cluster = "$Id: cluster.c,v 1.54 2006/12/04 20:50:02 bodea Exp $"; #include #include @@ -38,11 +38,13 @@ char const *cvs_id_cluster = "$Id: cluster.c,v 1.26 2004/12/16 23:40:31 bodea Ex */ // 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 int walk_bundle_number = 0; // The next bundle to send when doing the slow table walk. static int walk_tunnel_number = 0; // The next tunnel to send when doing the slow table walk. +int forked = 0; // Sanity check: CLI must not diddle with heartbeat table #define MAX_HEART_SIZE (8192) // Maximum size of heartbeat packet. Must be less than max IP packet size :) #define MAX_CHANGES (MAX_HEART_SIZE/(sizeof(sessiont) + sizeof(int) ) - 2) // Assumes a session is the biggest type! @@ -55,7 +57,7 @@ static struct { 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. @@ -84,6 +86,7 @@ int cluster_init() int opt; config->cluster_undefined_sessions = MAXSESSION-1; + config->cluster_undefined_bundles = MAXBUNDLE-1; config->cluster_undefined_tunnels = MAXTUNNEL-1; if (!config->cluster_address) @@ -126,6 +129,15 @@ int cluster_init() 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)); @@ -177,7 +189,7 @@ static int cluster_send_data(void *data, int datalen) // 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); @@ -192,7 +204,7 @@ static void add_type(char **p, int type, int more, char *data, int size) } // advertise our presence via BGP or gratuitous ARP -static void advertise(void) +static void advertise_routes(void) { #ifdef BGP if (bgp_configured) @@ -203,25 +215,34 @@ static void advertise(void) send_garp(config->bind_address); // Start taking traffic. } +// withdraw our routes (BGP only) +static void withdraw_routes(void) +{ +#ifdef BGP + if (bgp_configured) + bgp_enable_routing(0); +#endif /* BGP */ +} + static void cluster_uptodate(void) { if (config->cluster_iam_uptodate) return; - if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels) + if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles) return; config->cluster_iam_uptodate = 1; LOG(0, 0, 0, "Now uptodate with master.\n"); - advertise(); + advertise_routes(); } // // 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}; @@ -249,10 +270,10 @@ static int peer_send_data(in_addr_t peer, char *data, int size) // // 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); @@ -260,16 +281,11 @@ static int peer_send_message(in_addr_t peer, int type, int more, char *data, int 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; @@ -277,13 +293,30 @@ int master_forward_packet(char *data, int size, in_addr_t addr, int port) 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)); + 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. // @@ -291,10 +324,10 @@ int master_forward_packet(char *data, int size, in_addr_t addr, int port) // 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; @@ -316,10 +349,10 @@ int master_throttle_packet(int tbfid, char *data, int size) // // (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; @@ -336,7 +369,7 @@ int master_garden_packet(sessionidt s, char *data, int size) // 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; @@ -358,8 +391,8 @@ static void send_heartbeat(int seq, char *data, int size) // 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. @@ -372,7 +405,7 @@ void cluster_send_ping(time_t basetime) 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) ); } @@ -392,10 +425,16 @@ void master_update_counts(void) if (config->cluster_iam_master) // Only happens on the slaves. return; - if (!config->cluster_master_address) // If we don't have a master, skip it for a while. + if (!config->cluster_master_address) // If we don't have a master, skip it for a while. + return; + + // C_BYTES format changed in 2.1.0 (cluster version 5) + // during upgrade from previous versions, hang onto our counters + // for a bit until the new master comes up + if (config->cluster_last_hb_ver < 5) return; - i = MAX_B_RECS * 5; // Examine max 2000 sessions; + i = MAX_B_RECS * 5; // Examine max 3000 sessions; if (config->cluster_highest_sessionid > i) i = config->cluster_highest_sessionid; @@ -405,18 +444,21 @@ void master_update_counts(void) if ( walk_session_number > config->cluster_highest_sessionid) walk_session_number = 1; - if (!sess_count[walk_session_number].cin && !sess_count[walk_session_number].cout) - continue; // Unused. Skip it. + if (!sess_local[walk_session_number].cin && !sess_local[walk_session_number].cout) + continue; // Unchanged. Skip it. b[c].sid = walk_session_number; - b[c].in = sess_count[walk_session_number].cin; - b[c].out = sess_count[walk_session_number].cout; - - if (++c > MAX_B_RECS) // Send a max of 400 elements in a packet. - break; + b[c].pin = sess_local[walk_session_number].pin; + b[c].pout = sess_local[walk_session_number].pout; + b[c].cin = sess_local[walk_session_number].cin; + b[c].cout = sess_local[walk_session_number].cout; // Reset counters. - sess_count[walk_session_number].cin = sess_count[walk_session_number].cout = 0; + sess_local[walk_session_number].pin = sess_local[walk_session_number].pout = 0; + sess_local[walk_session_number].cin = sess_local[walk_session_number].cout = 0; + + if (++c > MAX_B_RECS) // Send a max of 600 elements in a packet. + break; } if (!c) // Didn't find any that changes. Get out of here! @@ -425,7 +467,7 @@ void master_update_counts(void) // 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; } @@ -456,17 +498,22 @@ void cluster_check_slaves(void) continue; // Shutdown peer! Skip them. if (peers[i].uptodate) - have_peers = 1; - - if (!peers[i].uptodate) + have_peers++; + else config->cluster_iam_uptodate = 0; // Start fast heartbeats } -#ifdef BGP - // in a cluster, withdraw/add routes when we get a peer/lose all peers - if (bgp_configured && have_peers != had_peers) - bgp_enable_routing(!have_peers); -#endif /* BGP */ + // in a cluster, withdraw/add routes when we get a peer/lose peers + if (have_peers != had_peers) + { + if (had_peers < config->cluster_master_min_adv && + have_peers >= config->cluster_master_min_adv) + withdraw_routes(); + + else if (had_peers >= config->cluster_master_min_adv && + have_peers < config->cluster_master_min_adv) + advertise_routes(); + } } // @@ -475,24 +522,26 @@ void cluster_check_slaves(void) // void cluster_check_master(void) { - int i, count, tcount, high_unique_id = 0; + int i, count, tcount, bcount, high_unique_id = 0; int last_free = 0; clockt t = TIME; static int probed = 0; + int have_peers; if (config->cluster_iam_master) return; // Only runs on the slaves... // If the master is late (missed 2 hearbeats by a second and a // hair) it may be that the switch has dropped us from the - // multicast group, try unicasting one probe to the master + // multicast group, try unicasting probes to the master // which will hopefully respond with a unicast heartbeat that // will allow us to limp along until the querier next runs. - if (TIME > (config->cluster_last_hb + 2 * config->cluster_hb_interval + 11)) + if (config->cluster_master_address + && TIME > (config->cluster_last_hb + 2 * config->cluster_hb_interval + 11)) { - if (!probed && config->cluster_master_address) + if (!probed || (TIME > (probed + 2 * config->cluster_hb_interval))) { - probed = 1; + probed = TIME; LOG(1, 0, 0, "Heartbeat from master %.1fs late, probing...\n", 0.1 * (TIME - (config->cluster_last_hb + config->cluster_hb_interval))); @@ -507,10 +556,15 @@ void cluster_check_master(void) 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"); - for (i = 0; i < num_peers; i++) + // In the process of shutting down, can't be master + if (main_quit) + return; + + for (i = have_peers = 0; i < num_peers; i++) { if ((peers[i].timestamp + config->cluster_hb_timeout) < t) continue; // Stale peer! Skip them. @@ -528,6 +582,9 @@ void cluster_check_master(void) LOG(1, 0, 0, "Expecting %s to become master\n", fmtaddr(peers[i].peer, 0)); return; // They'll win the election. Wait for them to come up. } + + if (peers[i].uptodate) + have_peers++; } // Wow. it's been ages since I last heard a heartbeat @@ -535,10 +592,14 @@ void cluster_check_master(void) // 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"); + if (have_peers < config->cluster_master_min_adv) + advertise_routes(); + else + withdraw_routes(); + if (config->cluster_seq_number == -1) config->cluster_seq_number = 0; @@ -555,6 +616,19 @@ void cluster_check_master(void) config->cluster_highest_tunnelid = i; } + // + // Go through and mark all the bundles as defined. + // Count the highest used bundle number as well. + // + config->cluster_highest_bundleid = 0; + for (i = 0, bcount = 0; i < MAXBUNDLE; ++i) { + if (bundle[i].state == BUNDLEUNDEF) + bundle[i].state = BUNDLEFREE; + + if (bundle[i].state != BUNDLEFREE && i > config->cluster_highest_bundleid) + config->cluster_highest_bundleid = i; + } + // // Go through and mark all the sessions as being defined. // reset the idle timeouts. @@ -570,54 +644,60 @@ void cluster_check_master(void) ++count; } - if (session[i].tunnel == T_FREE) { // Unused session. Add to free list. + if (!session[i].opened) { // Unused session. Add to free list. + memset(&session[i], 0, sizeof(session[i])); + session[i].tunnel = T_FREE; session[last_free].next = i; session[i].next = 0; last_free = i; + continue; } - // Reset all the idle timeouts.. - session[i].last_packet = time_now; + // Reset idle timeouts.. + session[i].last_packet = session[i].last_data = time_now; - // Accumulate un-sent byte counters. - session[i].cin += sess_count[i].cin; - session[i].cout += sess_count[i].cout; - session[i].total_cin += sess_count[i].cin; - session[i].total_cout += sess_count[i].cout; + // Reset die relative to our uptime rather than the old master's + if (session[i].die) session[i].die = TIME; - sess_count[i].cin = sess_count[i].cout = 0; + // Accumulate un-sent byte/packet counters. + increment_counter(&session[i].cin, &session[i].cin_wrap, sess_local[i].cin); + increment_counter(&session[i].cout, &session[i].cout_wrap, sess_local[i].cout); + session[i].cin_delta += sess_local[i].cin; + session[i].cout_delta += sess_local[i].cout; - session[i].radius = 0; // Reset authentication as the radius blocks aren't up to date. + session[i].pin += sess_local[i].pin; + session[i].pout += sess_local[i].pout; + + sess_local[i].cin = sess_local[i].cout = 0; + sess_local[i].pin = sess_local[i].pout = 0; + + sess_local[i].radius = 0; // Reset authentication as the radius blocks aren't up to date. if (session[i].unique_id >= high_unique_id) // This is different to the index into the session table!!! high_unique_id = session[i].unique_id+1; - session[i].tbf_in = session[i].tbf_out = 0; // Remove stale pointers from old master. throttle_session(i, session[i].throttle_in, session[i].throttle_out); - if (session[i].tunnel != T_FREE && i > config->cluster_highest_sessionid) - config->cluster_highest_sessionid = i; + config->cluster_highest_sessionid = i; } session[last_free].next = 0; // End of chain. - last_id = high_unique_id; // Keep track of the highest used session ID. + last_id = high_unique_id; // Keep track of the highest used session ID. become_master(); rebuild_address_pool(); // If we're not the very first master, this is a big issue! - if(count>0) + if (count > 0) LOG(0, 0, 0, "Warning: Fixed %d uninitialized sessions in becoming master!\n", count); config->cluster_undefined_sessions = 0; + config->cluster_undefined_bundles = 0; config->cluster_undefined_tunnels = 0; config->cluster_iam_uptodate = 1; // assume all peers are up-to-date - if (!num_peers) // lone master - advertise(); - // FIXME. We need to fix up the tunnel control message // queue here! There's a number of other variables we // should also update. @@ -632,7 +712,7 @@ void cluster_check_master(void) // we fix it up here, and we ensure that the 'first free session' // pointer is valid. // -static void cluster_check_sessions(int highsession, int freesession_ptr, int hightunnel) +static void cluster_check_sessions(int highsession, int freesession_ptr, int highbundle, int hightunnel) { int i; @@ -641,7 +721,7 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig if (config->cluster_iam_uptodate) return; - if (highsession > config->cluster_undefined_sessions && hightunnel > config->cluster_undefined_tunnels) + if (highsession > config->cluster_undefined_sessions && highbundle > config->cluster_undefined_bundles && hightunnel > config->cluster_undefined_tunnels) return; // Clear out defined sessions, counting the number of @@ -649,12 +729,25 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig config->cluster_undefined_sessions = 0; for (i = 1 ; i < MAXSESSION; ++i) { if (i > highsession) { - session[i].tunnel = 0; // Defined. + if (session[i].tunnel == T_UNDEF) session[i].tunnel = T_FREE; // Defined. continue; } - if (session[i].tunnel != T_UNDEF) + + if (session[i].tunnel == T_UNDEF) + ++config->cluster_undefined_sessions; + } + + // Clear out defined bundles, counting the number of + // undefs remaining. + config->cluster_undefined_bundles = 0; + for (i = 1 ; i < MAXBUNDLE; ++i) { + if (i > highbundle) { + if (bundle[i].state == BUNDLEUNDEF) bundle[i].state = BUNDLEFREE; // Defined. continue; - ++config->cluster_undefined_sessions; + } + + if (bundle[i].state == BUNDLEUNDEF) + ++config->cluster_undefined_bundles; } // Clear out defined tunnels, counting the number of @@ -662,18 +755,18 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig config->cluster_undefined_tunnels = 0; for (i = 1 ; i < MAXTUNNEL; ++i) { if (i > hightunnel) { - tunnel[i].state = TUNNELFREE; // Defined. + if (tunnel[i].state == TUNNELUNDEF) tunnel[i].state = TUNNELFREE; // Defined. continue; } - if (tunnel[i].state != TUNNELUNDEF) - continue; - ++config->cluster_undefined_tunnels; + + if (tunnel[i].state == TUNNELUNDEF) + ++config->cluster_undefined_tunnels; } - if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels) { - LOG(2, 0, 0, "Cleared undefined sessions/tunnels. %d sess (high %d), %d tunn (high %d)\n", - config->cluster_undefined_sessions, highsession, config->cluster_undefined_tunnels, hightunnel); + if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles) { + LOG(2, 0, 0, "Cleared undefined sessions/bundles/tunnels. %d sess (high %d), %d bund (high %d), %d tunn (high %d)\n", + config->cluster_undefined_sessions, highsession, config->cluster_undefined_bundles, highbundle, config->cluster_undefined_tunnels, hightunnel); return; } @@ -683,7 +776,7 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig 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. @@ -697,13 +790,34 @@ static int hb_add_type(char **p, int type, int id) // 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_CBUNDLE: { // Compressed C_BUNDLE + uint8_t c[sizeof(bundlet) * 2]; // Bigger than worst case. + uint8_t *d = (uint8_t *) &bundle[id]; + uint8_t *orig = d; + int size; + + size = rle_compress( &d, sizeof(bundlet), c, sizeof(c) ); + + // Did we compress the full structure, and is the size actually + // reduced?? + if ( (d - orig) == sizeof(bundlet) && size < sizeof(bundlet) ) { + add_type(p, C_CBUNDLE, id, c, size); + break; + } + // Failed to compress : Fall through. + } + + case C_BUNDLE: + add_type(p, C_BUNDLE, id, (uint8_t *) &bundle[id], sizeof(bundlet)); break; case C_CTUNNEL: { // Compressed C_TUNNEL @@ -722,8 +836,8 @@ static int hb_add_type(char **p, int type, int id) } // 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); @@ -738,10 +852,10 @@ static int hb_add_type(char **p, int type, int id) // void cluster_heartbeat() { - int i, count = 0, tcount = 0; - char buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ]; + int i, count = 0, tcount = 0, bcount = 0; + 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; @@ -759,13 +873,15 @@ void cluster_heartbeat() h.highsession = config->cluster_highest_sessionid; h.freesession = sessionfree; h.hightunnel = config->cluster_highest_tunnelid; + h.highbundle = config->cluster_highest_bundleid; h.size_sess = sizeof(sessiont); // Just in case. + h.size_bund = sizeof(bundlet); h.size_tunn = sizeof(tunnelt); h.interval = config->cluster_hb_interval; 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); @@ -814,6 +930,22 @@ void cluster_heartbeat() ++tcount; } + // + // Fill out the packet with bundles from the bundle table... + while ( (p + sizeof(uint32_t) * 2 + sizeof(bundlet) ) < (buff + MAX_HEART_SIZE) ) { + + if (!walk_bundle_number) // bundle #0 isn't valid. + ++walk_bundle_number; + + if (bcount >= config->cluster_highest_bundleid) + break; + + hb_add_type(&p, C_CTUNNEL, walk_bundle_number); + walk_tunnel_number = (1+walk_bundle_number)%(config->cluster_highest_bundleid+1); // +1 avoids divide by zero. + + ++bcount; + } + // // Did we do something wrong? if (p > (buff + sizeof(buff))) { // Did we somehow manage to overun the buffer? @@ -823,9 +955,9 @@ void cluster_heartbeat() } LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes " - "(%d x-sess, %d x-tunnels, %d highsess, %d hightun, size %d)\n", + "(%d x-sess, %d x-bundles, %d x-tunnels, %d highsess, %d highbund, %d hightun, size %d)\n", HB_VERSION, h.seq, h.table_version, config->cluster_num_changes, - count, tcount, config->cluster_highest_sessionid, + count, bcount, tcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid, config->cluster_highest_tunnelid, (int) (p - buff)); config->cluster_num_changes = 0; @@ -866,9 +998,25 @@ int cluster_send_session(int sid) return -1; } + if (forked) { + LOG(0, sid, 0, "cluster_send_session called from child process!\n"); + return -1; + } + return type_changed(C_CSESSION, sid); } +// A particular bundle has been changed! +int cluster_send_bundle(int bid) +{ + if (!config->cluster_iam_master) { + LOG(0, 0, bid, "I'm not a master, but I just tried to change a bundle!\n"); + return -1; + } + + return type_changed(C_CBUNDLE, bid); +} + // A particular tunnel has been changed! int cluster_send_tunnel(int tid) { @@ -892,6 +1040,13 @@ static int cluster_catchup_slave(int seq, in_addr_t slave) int diff; LOG(1, 0, 0, "Slave %s sent LASTSEEN with seq %d\n", fmtaddr(slave, 0), seq); + if (!config->cluster_iam_master) { + LOG(1, 0, 0, "Got LASTSEEN but I'm not a master! Redirecting it to %s.\n", + fmtaddr(config->cluster_master_address, 0)); + + peer_send_message(slave, C_MASTER, config->cluster_master_address, NULL, 0); + return 0; + } diff = config->cluster_seq_number - seq; // How many packet do we need to send? if (diff < 0) @@ -903,9 +1058,11 @@ static int cluster_catchup_slave(int seq, in_addr_t slave) return peer_send_message(slave, C_KILL, seq, NULL, 0);// Kill the slave. Nothing else to do. } + LOG(1, 0, 0, "Sending %d catchup packets to slave %s\n", diff, fmtaddr(slave, 0) ); + // Now resend every packet that it missed, in order. while (seq != config->cluster_seq_number) { - s = seq%HB_HISTORY_SIZE; + s = seq % HB_HISTORY_SIZE; if (seq != past_hearts[s].seq) { LOG(0, 0, 0, "Tried to re-send heartbeat for %s but %d doesn't match %d! (%d,%d)\n", fmtaddr(slave, 0), seq, past_hearts[s].seq, s, config->cluster_seq_number); @@ -958,12 +1115,13 @@ static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size } // Is this the master shutting down?? - if (peer == config->cluster_master_address && !basetime) { - LOG(3, 0, 0, "Master %s shutting down...\n", fmtaddr(config->cluster_master_address, 0)); + if (peer == config->cluster_master_address) { + LOG(3, 0, 0, "Master %s %s\n", fmtaddr(config->cluster_master_address, 0), + basetime ? "has restarted!" : "shutting down..."); + config->cluster_master_address = 0; config->cluster_last_hb = 0; // Force an election. cluster_check_master(); - return 0; } if (i >= num_peers) @@ -1000,12 +1158,36 @@ static int cluster_add_peer(in_addr_t peer, time_t basetime, pingt *pp, int size return 1; } +// A slave responds with C_MASTER when it gets a message which should have gone to a master. +static int cluster_set_master(in_addr_t peer, in_addr_t master) +{ + if (config->cluster_iam_master) // Sanity... + return 0; + + LOG(3, 0, 0, "Peer %s set the master to %s...\n", fmtaddr(peer, 0), + 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; +} + /* Handle the slave updating the byte counters for the master. */ // // 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; @@ -1022,12 +1204,19 @@ static int cluster_handle_bytes(char *data, int size) return -1; /* Abort processing */ } - session[b->sid].total_cin += b->in; - session[b->sid].total_cout += b->out; + session[b->sid].pin += b->pin; + session[b->sid].pout += b->pout; + + increment_counter(&session[b->sid].cin, &session[b->sid].cin_wrap, b->cin); + increment_counter(&session[b->sid].cout, &session[b->sid].cout_wrap, b->cout); + + session[b->sid].cin_delta += b->cin; + session[b->sid].cout_delta += b->cout; - session[b->sid].cin += b->in; - session[b->sid].cout += b->out; - session[b->sid].last_packet = time_now; // Reset idle timer! + if (b->cin) + session[b->sid].last_packet = session[b->sid].last_data = time_now; + else if (b->cout) + session[b->sid].last_data = time_now; size -= sizeof(*b); ++b; @@ -1067,6 +1256,31 @@ static int cluster_recv_session(int more, uint8_t *p) return 0; } +static int cluster_recv_bundle(int more, uint8_t *p) +{ + if (more >= MAXBUNDLE) { + LOG(0, 0, 0, "DANGER: Received a bundle id > MAXBUNDLE!\n"); + return -1; + } + + if (bundle[more].state == BUNDLEUNDEF) { + if (config->cluster_iam_uptodate) { // Sanity. + LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined bundle!\n"); + } else { + --config->cluster_undefined_bundles; + } + } + + memcpy(&bundle[more], p, sizeof(bundle[more]) ); + + LOG(5, 0, more, "Received bundle update\n"); + + if (!config->cluster_iam_uptodate) + cluster_uptodate(); // Check to see if we're up to date. + + return 0; +} + static int cluster_recv_tunnel(int more, uint8_t *p) { if (more >= MAXTUNNEL) { @@ -1100,28 +1314,150 @@ static int cluster_recv_tunnel(int more, uint8_t *p) } +// pre v5 heartbeat session structure +struct oldsession { + sessionidt next; + sessionidt far; + tunnelidt tunnel; + in_addr_t ip; + int ip_pool_index; + unsigned long unique_id; + uint16_t nr; + uint16_t ns; + uint32_t magic; + uint32_t cin, cout; + uint32_t pin, pout; + uint32_t total_cin; + uint32_t total_cout; + uint32_t id; + uint16_t throttle_in; + uint16_t throttle_out; + clockt opened; + clockt die; + time_t last_packet; + in_addr_t dns1, dns2; + routet route[MAXROUTE]; + uint16_t radius; + uint16_t mru; + uint16_t tbf_in; + uint16_t tbf_out; + uint8_t l2tp_flags; + uint8_t reserved_old_snoop; + uint8_t walled_garden; + uint8_t flags1; + char random_vector[MAXTEL]; + int random_vector_length; + char user[129]; + char called[MAXTEL]; + char calling[MAXTEL]; + 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; + uint8_t filter_in; + uint8_t filter_out; + char reserved[18]; +}; + +static uint8_t *convert_session(struct oldsession *old) +{ + static sessiont new; + int i; + + memset(&new, 0, sizeof(new)); + + new.next = old->next; + new.far = old->far; + new.tunnel = old->tunnel; + new.flags = old->l2tp_flags; + new.ip = old->ip; + new.ip_pool_index = old->ip_pool_index; + new.unique_id = old->unique_id; + new.magic = old->magic; + new.pin = old->pin; + new.pout = old->pout; + new.cin = old->total_cin; + new.cout = old->total_cout; + new.cin_delta = old->cin; + new.cout_delta = old->cout; + new.throttle_in = old->throttle_in; + new.throttle_out = old->throttle_out; + new.filter_in = old->filter_in; + new.filter_out = old->filter_out; + new.mru = old->mru; + new.opened = old->opened; + new.die = old->die; + new.last_packet = old->last_packet; + new.dns1 = old->dns1; + new.dns2 = old->dns2; + new.tbf_in = old->tbf_in; + new.tbf_out = old->tbf_out; + new.random_vector_length = old->random_vector_length; + new.tx_connect_speed = old->tx_connect_speed; + new.rx_connect_speed = old->rx_connect_speed; + new.snoop_ip = old->snoop_ip; + new.snoop_port = old->snoop_port; + new.walled_garden = old->walled_garden; + + memcpy(new.random_vector, old->random_vector, sizeof(new.random_vector)); + memcpy(new.user, old->user, sizeof(new.user)); + memcpy(new.called, old->called, sizeof(new.called)); + memcpy(new.calling, old->calling, sizeof(new.calling)); + + 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; +} + // // Process a heartbeat.. // // v3: added interval, timeout // v4: added table_version +// v5: added ipv6, re-ordered session structure static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t *p, in_addr_t addr) { heartt *h; int s = size - (p-data); int i, type; + int hb_ver = more; -#if HB_VERSION != 4 +#if HB_VERSION != 5 # error "need to update cluster_process_heartbeat()" #endif - // we handle versions 3 through 4 - if (more < 3 || more > HB_VERSION) { - LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", more); + // we handle versions 3 through 5 + if (hb_ver < 3 || hb_ver > HB_VERSION) { + LOG(0, 0, 0, "Received a heartbeat version that I don't support (%d)!\n", hb_ver); return -1; // Ignore it?? } - // Ok. It's a heartbeat packet from a cluster master! + if (size > sizeof(past_hearts[0].data)) { + LOG(0, 0, 0, "Received an oversize heartbeat from %s (%d)!\n", fmtaddr(addr, 0), size); + return -1; + } + if (s < sizeof(*h)) goto shortpacket; @@ -1141,7 +1477,7 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t return -1; // Skip it. } - if (more >= 4) { + if (hb_ver >= 4) { if (h->table_version > config->cluster_table_version) { LOG(0, 0, 0, "They've seen more state changes (%" PRIu64 " vs my %" PRIu64 ") so I'm gone!\n", h->table_version, config->cluster_table_version); @@ -1168,18 +1504,55 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t exit(1); } + // + // Send it a unicast heartbeat to see give it a chance to die. + // NOTE: It's actually safe to do seq-number - 1 without checking + // for wrap around. + // + cluster_catchup_slave(config->cluster_seq_number - 1, addr); + return -1; // Skip it. } + // + // Try and guard against a stray master appearing. + // + // Ignore heartbeats received from another master before the + // timeout (less a smidgen) for the old master has elapsed. + // + // 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) { + 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)); + return -1; // ignore + } + if (config->cluster_seq_number == -1) // Don't have one. Just align to the master... config->cluster_seq_number = h->seq; config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!! + config->cluster_last_hb_ver = hb_ver; // remember what cluster version the master is using if (config->cluster_seq_number != h->seq) { // Out of sequence heartbeat! - LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. asking for resend.\n", h->seq, config->cluster_seq_number); + static int lastseen_seq = 0; + static time_t lastseen_time = 0; + + // limit to once per second for a particular seq# + int ask = (config->cluster_seq_number != lastseen_seq || time_now != lastseen_time); - peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0); + LOG(1, 0, 0, "HB: Got seq# %d but was expecting %d. %s.\n", + h->seq, config->cluster_seq_number, + ask ? "Asking for resend" : "Ignoring"); + + if (ask) + { + lastseen_seq = config->cluster_seq_number; + lastseen_time = time_now; + peer_send_message(addr, C_LASTSEEN, config->cluster_seq_number, NULL, 0); + } config->cluster_last_hb = TIME; // Reset to ensure that we don't become master!! @@ -1198,7 +1571,7 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t // Check that we don't have too many undefined sessions, and // that the free session pointer is correct. - cluster_check_sessions(h->highsession, h->freesession, h->hightunnel); + cluster_check_sessions(h->highsession, h->freesession, h->highbundle, h->hightunnel); if (h->interval != config->cluster_hb_interval) { @@ -1236,6 +1609,18 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t size = rle_decompress((uint8_t **) &p, s, c, sizeof(c) ); s -= (p - orig_p); + // session struct changed with v5 + if (hb_ver < 5) + { + if (size != sizeof(struct oldsession)) { + LOG(0, 0, 0, "DANGER: Received a v%d CSESSION that didn't decompress correctly!\n", hb_ver); + // Now what? Should exit! No-longer up to date! + break; + } + cluster_recv_session(more, convert_session((struct oldsession *) c)); + break; + } + if (size != sizeof(sessiont) ) { // Ouch! Very very bad! LOG(0, 0, 0, "DANGER: Received a CSESSION that didn't decompress correctly!\n"); // Now what? Should exit! No-longer up to date! @@ -1246,6 +1631,18 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t break; } case C_SESSION: + if (hb_ver < 5) + { + if (s < sizeof(struct oldsession)) + goto shortpacket; + + cluster_recv_session(more, convert_session((struct oldsession *) p)); + + p += sizeof(struct oldsession); + s -= sizeof(struct oldsession); + break; + } + if ( s < sizeof(session[more])) goto shortpacket; @@ -1264,7 +1661,7 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t 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; } @@ -1282,6 +1679,34 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t p += sizeof(tunnel[more]); s -= sizeof(tunnel[more]); break; + + case C_CBUNDLE: { // Compressed bundle structure. + uint8_t c[ sizeof(bundlet) + 2]; + int size; + uint8_t *orig_p = p; + + size = rle_decompress((uint8_t **) &p, s, c, sizeof(c)); + s -= (p - orig_p); + + if (size != sizeof(bundlet) ) { // Ouch! Very very bad! + LOG(0, 0, 0, "DANGER: Received a CBUNDLE that didn't decompress correctly!\n"); + // Now what? Should exit! No-longer up to date! + break; + } + + cluster_recv_bundle(more, c); + break; + + } + case C_BUNDLE: + if ( s < sizeof(bundle[more])) + goto shortpacket; + + cluster_recv_bundle(more, p); + + p += sizeof(bundle[more]); + s -= sizeof(bundle[more]); + break; default: LOG(0, 0, 0, "DANGER: I received a heartbeat element where I didn't understand the type! (%d)\n", type); return -1; // can't process any more of the packet!! @@ -1309,10 +1734,10 @@ shortpacket: // 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) @@ -1334,31 +1759,51 @@ int processcluster(char *data, int size, in_addr_t addr) p += sizeof(uint32_t); s -= sizeof(uint32_t); - switch (type) { - case C_PING: // Update the peers table. + 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_MASTER: // Our master is wrong + return cluster_set_master(addr, more); - case C_FORWARD: { // Forwarded control packet. pass off to processudp. - struct sockaddr_in a; - a.sin_addr.s_addr = more; + case C_LASTSEEN: // Catch up a slave (slave missed a packet). + return cluster_catchup_slave(more, addr); - 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) + { + struct in_addr local; + local.s_addr = config->bind_address ? config->bind_address : my_address; + processdae(p, s, &a, sizeof(a), &local); + } + 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)); @@ -1379,6 +1824,11 @@ int processcluster(char *data, int size, in_addr_t addr) return 0; case C_BYTES: + if (!config->cluster_iam_master) { + LOG(0, 0, 0, "I'm not the master, but I got a C_BYTES from %s?\n", fmtaddr(addr, 0)); + return -1; + } + return cluster_handle_bytes(p, s); case C_KILL: // The master asked us to die!? (usually because we're too out of date). @@ -1442,11 +1892,13 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc) cli_print(cli, "Table version # : %" PRIu64, config->cluster_table_version); cli_print(cli, "Next sequence number expected: %d", config->cluster_seq_number); cli_print(cli, "%d sessions undefined of %d", config->cluster_undefined_sessions, config->cluster_highest_sessionid); + cli_print(cli, "%d bundles undefined of %d", config->cluster_undefined_bundles, config->cluster_highest_bundleid); cli_print(cli, "%d tunnels undefined of %d", config->cluster_undefined_tunnels, config->cluster_highest_tunnelid); } else { cli_print(cli, "Table version # : %" PRIu64, config->cluster_table_version); cli_print(cli, "Next heartbeat # : %d", config->cluster_seq_number); cli_print(cli, "Highest session : %d", config->cluster_highest_sessionid); + cli_print(cli, "Highest bundle : %d", config->cluster_highest_bundleid); cli_print(cli, "Highest tunnel : %d", config->cluster_highest_tunnelid); cli_print(cli, "%d changes queued for sending", config->cluster_num_changes); } @@ -1530,7 +1982,7 @@ static int rle_decompress(uint8_t **src_p, int ssize, uint8_t *dst, int dsize) { 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.