X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/f402c659e1ee988a4b559afa1b54d85f3b9996b7..5e631c6978946b8333bcd49b79ae5d009ba93413:/cluster.c diff --git a/cluster.c b/cluster.c index ca0b748..abe2a63 100644 --- a/cluster.c +++ b/cluster.c @@ -1,6 +1,6 @@ // L2TPNS Clustering Stuff -char const *cvs_id_cluster = "$Id: cluster.c,v 1.48 2005/12/05 12:47:12 bodea Exp $"; +char const *cvs_id_cluster = "$Id: cluster.c,v 1.51 2006/04/27 09:53:49 bodea Exp $"; #include #include @@ -42,6 +42,7 @@ extern int cluster_sockfd; // The filedescriptor for the cluster communications 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 @@ -85,6 +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) @@ -227,7 +229,7 @@ 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; @@ -520,7 +522,7 @@ 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; @@ -614,6 +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. @@ -675,10 +690,11 @@ void cluster_check_master(void) 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 @@ -696,7 +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; @@ -705,7 +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 @@ -721,6 +737,19 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig ++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; + } + + if (bundle[i].state == BUNDLEUNDEF) + ++config->cluster_undefined_bundles; + } + // Clear out defined tunnels, counting the number of // undefs remaining. config->cluster_undefined_tunnels = 0; @@ -735,9 +764,9 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig } - 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; } @@ -770,6 +799,27 @@ static int hb_add_type(uint8_t **p, int type, int id) 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 uint8_t c[sizeof(tunnelt) * 2]; // Bigger than worst case. uint8_t *d = (uint8_t *) &tunnel[id]; @@ -802,7 +852,7 @@ static int hb_add_type(uint8_t **p, int type, int id) // void cluster_heartbeat() { - int i, count = 0, tcount = 0; + int i, count = 0, tcount = 0, bcount = 0; uint8_t buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ]; heartt h; uint8_t *p = buff; @@ -823,7 +873,9 @@ 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; @@ -878,6 +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? @@ -887,9 +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; @@ -938,6 +1006,17 @@ int cluster_send_session(int sid) 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) { @@ -1175,6 +1254,31 @@ 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) { @@ -1272,8 +1376,6 @@ static uint8_t *convert_session(struct oldsession *old) 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; @@ -1463,7 +1565,7 @@ 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) { @@ -1571,6 +1673,34 @@ 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!! @@ -1657,7 +1787,11 @@ int processcluster(uint8_t *data, int size, in_addr_t addr) STAT(recv_forward); if (type == C_FORWARD_DAE) - processdae(p, s, &a, sizeof(a)); + { + 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); @@ -1752,11 +1886,13 @@ 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); }