X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/152b5b67a437a2c7b4eb16277dbdcedfaaa43996..9da560ae8ef7f5a1c98884183440e36eb7fb0c15:/cluster.c diff --git a/cluster.c b/cluster.c index 7b6b33e..fc4d58a 100644 --- a/cluster.c +++ b/cluster.c @@ -16,11 +16,13 @@ #include #include #include +#include #include "l2tpns.h" #include "cluster.h" #include "util.h" #include "tbf.h" +#include "pppoe.h" #ifdef BGP #include "bgp.h" @@ -42,6 +44,7 @@ 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. +static int walk_groupe_number = 0; // The next groupe 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 :) @@ -86,6 +89,7 @@ int cluster_init() config->cluster_undefined_sessions = MAXSESSION-1; config->cluster_undefined_bundles = MAXBUNDLE-1; config->cluster_undefined_tunnels = MAXTUNNEL-1; + config->cluster_undefined_groupes = MAXGROUPE-1; if (!config->cluster_address) return 0; @@ -227,7 +231,8 @@ static void cluster_uptodate(void) if (config->cluster_iam_uptodate) return; - if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles) + if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || + config->cluster_undefined_bundles || config->cluster_undefined_groupes) return; config->cluster_iam_uptodate = 1; @@ -303,10 +308,40 @@ static int _forward_packet(uint8_t *data, int size, in_addr_t addr, int port, in // // 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) +//(note: THIS ROUTINE WRITES TO pack[-6]). +int master_forward_packet(uint8_t *data, int size, in_addr_t addr, uint16_t port, uint16_t indexudp) { - return _forward_packet(data, size, addr, port, C_FORWARD); + uint8_t *p = data - (3 * sizeof(uint32_t)); + uint8_t *psave = p; + uint32_t indexandport = port | ((indexudp << 16) & 0xFFFF0000); + + 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, (uint8_t *) &indexandport, sizeof(indexandport)); + + return peer_send_data(config->cluster_master_address, psave, size + (3 * sizeof(uint32_t))); +} + +// Forward PPPOE packet to the master. +//(note: THIS ROUTINE WRITES TO pack[-4]). +int master_forward_pppoe_packet(uint8_t *data, int size, uint8_t codepad) +{ + uint8_t *p = data - (2 * sizeof(uint32_t)); + uint8_t *psave = p; + + if (!config->cluster_master_address) // No election has been held yet. Just skip it. + return -1; + + LOG(4, 0, 0, "Forward PPPOE packet to master, code %s (size %d)\n", get_string_codepad(codepad), size); + + STAT(c_forwarded); + add_type(&p, C_PPPOE_FORWARD, codepad, NULL, 0); + + return peer_send_data(config->cluster_master_address, psave, size + (2 * sizeof(uint32_t))); } // Forward a DAE RADIUS packet to the master. @@ -363,6 +398,28 @@ int master_garden_packet(sessionidt s, uint8_t *data, int size) } +// +// Forward a MPPP packet to the master for handling. +// +// (Note that this must be called with the tun header +// as the start of the data). +// (i.e. this routine writes to data[-8]). +int master_forward_mppp_packet(sessionidt s, uint8_t *data, int size) +{ + uint8_t *p = data - (2 * sizeof(uint32_t)); + uint8_t *psave = p; + + if (!config->cluster_master_address) // No election has been held yet. Just skip it. + return -1; + + LOG(4, 0, 0, "Forward MPPP packet to master (size %d)\n", size); + + add_type(&p, C_MPPP_FORWARD, s, NULL, 0); + + return peer_send_data(config->cluster_master_address, psave, size + (2 * sizeof(uint32_t))); + +} + // // Send a chunk of data as a heartbeat.. // We save it in the history buffer as we do so. @@ -400,7 +457,8 @@ void cluster_send_ping(time_t basetime) x.ver = 1; x.addr = config->bind_address; - x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels + config->cluster_undefined_bundles; + x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels + + config->cluster_undefined_groupes + config->cluster_undefined_bundles; x.basetime = basetime; add_type(&p, C_PING, basetime, (uint8_t *) &x, sizeof(x)); @@ -584,6 +642,7 @@ void cluster_check_master(void) // to become a master!!! config->cluster_iam_master = 1; + pppoe_send_garp(); // gratuitous arp of the pppoe interface LOG(0, 0, 0, "I am declaring myself the master!\n"); @@ -621,6 +680,20 @@ void cluster_check_master(void) config->cluster_highest_bundleid = i; } + // + // Go through and mark all the groupes as defined. + // Count the highest used groupe number as well. + // + config->cluster_highest_groupeid = 0; + for (i = 0; i < MAXGROUPE; ++i) + { + if (grpsession[i].state == GROUPEUNDEF) + grpsession[i].state = GROUPEFREE; + + if (grpsession[i].state != GROUPEFREE && i > config->cluster_highest_groupeid) + config->cluster_highest_groupeid = i; + } + // // Go through and mark all the sessions as being defined. // reset the idle timeouts. @@ -688,6 +761,7 @@ void cluster_check_master(void) config->cluster_undefined_sessions = 0; config->cluster_undefined_bundles = 0; config->cluster_undefined_tunnels = 0; + config->cluster_undefined_groupes = 0; config->cluster_iam_uptodate = 1; // assume all peers are up-to-date // FIXME. We need to fix up the tunnel control message @@ -704,7 +778,7 @@ 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 highbundle, int hightunnel) +static void cluster_check_sessions(int highsession, int freesession_ptr, int highbundle, int hightunnel, int highgroupe) { int i; @@ -713,7 +787,8 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig if (config->cluster_iam_uptodate) return; - if (highsession > config->cluster_undefined_sessions && highbundle > config->cluster_undefined_bundles && hightunnel > config->cluster_undefined_tunnels) + if (highsession > config->cluster_undefined_sessions && highbundle > config->cluster_undefined_bundles && + highgroupe > config->cluster_undefined_groupes && hightunnel > config->cluster_undefined_tunnels) return; // Clear out defined sessions, counting the number of @@ -755,10 +830,23 @@ static void cluster_check_sessions(int highsession, int freesession_ptr, int hig ++config->cluster_undefined_tunnels; } + // Clear out defined groupe, counting the number of + // undefs remaining. + config->cluster_undefined_groupes = 0; + for (i = 1 ; i < MAXGROUPE; ++i) { + if (i > highgroupe) { + if (grpsession[i].state == GROUPEUNDEF) grpsession[i].state = GROUPEFREE; // Defined. + continue; + } - 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); + if (grpsession[i].state == GROUPEUNDEF) + ++config->cluster_undefined_groupes; + } + + if (config->cluster_undefined_sessions || config->cluster_undefined_tunnels || config->cluster_undefined_bundles || config->cluster_undefined_groupes) { + LOG(2, 0, 0, "Cleared undefined sessions/bundles/tunnels. %d sess (high %d), %d bund (high %d), %d grp (high %d), %d tunn (high %d)\n", + config->cluster_undefined_sessions, highsession, config->cluster_undefined_bundles, highbundle, + config->cluster_undefined_groupes, highgroupe, config->cluster_undefined_tunnels, hightunnel); return; } @@ -812,6 +900,27 @@ static int hb_add_type(uint8_t **p, int type, int id) add_type(p, C_BUNDLE, id, (uint8_t *) &bundle[id], sizeof(bundlet)); break; + case C_CGROUPE: { // Compressed C_GROUPE + uint8_t c[sizeof(groupsesst) * 2]; // Bigger than worst case. + uint8_t *d = (uint8_t *) &grpsession[id]; + uint8_t *orig = d; + int size; + + size = rle_compress( &d, sizeof(groupsesst), c, sizeof(c) ); + + // Did we compress the full structure, and is the size actually + // reduced?? + if ( (d - orig) == sizeof(groupsesst) && size < sizeof(groupsesst) ) + { + add_type(p, C_CGROUPE, id, c, size); + break; + } + // Failed to compress : Fall through. + } + case C_GROUPE: + add_type(p, C_GROUPE, id, (uint8_t *) &grpsession[id], sizeof(groupsesst)); + break; + case C_CTUNNEL: { // Compressed C_TUNNEL uint8_t c[sizeof(tunnelt) * 2]; // Bigger than worst case. uint8_t *d = (uint8_t *) &tunnel[id]; @@ -844,7 +953,7 @@ static int hb_add_type(uint8_t **p, int type, int id) // void cluster_heartbeat() { - int i, count = 0, tcount = 0, bcount = 0; + int i, count = 0, tcount = 0, bcount = 0, gcount = 0; uint8_t buff[MAX_HEART_SIZE + sizeof(heartt) + sizeof(int) ]; heartt h; uint8_t *p = buff; @@ -866,9 +975,11 @@ void cluster_heartbeat() h.freesession = sessionfree; h.hightunnel = config->cluster_highest_tunnelid; h.highbundle = config->cluster_highest_bundleid; + h.highgroupe = config->cluster_highest_groupeid; h.size_sess = sizeof(sessiont); // Just in case. h.size_bund = sizeof(bundlet); h.size_tunn = sizeof(tunnelt); + h.nextgrpid = gnextgrpid; h.interval = config->cluster_hb_interval; h.timeout = config->cluster_hb_timeout; h.table_version = config->cluster_table_version; @@ -887,7 +998,7 @@ void cluster_heartbeat() // // Fill out the packet with sessions from the session table... - // (not forgetting to leave space so we can get some tunnels in too ) + // (not forgetting to leave space so we can get some tunnels,bundle,groupe in too ) while ( (p + sizeof(uint32_t) * 2 + sizeof(sessiont) * 2 ) < (buff + MAX_HEART_SIZE) ) { if (!walk_session_number) // session #0 isn't valid. @@ -902,40 +1013,59 @@ void cluster_heartbeat() ++count; // Count the number of extra sessions we're sending. } - // - // Fill out the packet with tunnels from the tunnel table... - // This effectively means we walk the tunnel table more quickly - // than the session table. This is good because stuffing up a - // tunnel is a much bigger deal than stuffing up a session. - // - while ( (p + sizeof(uint32_t) * 2 + sizeof(tunnelt) ) < (buff + MAX_HEART_SIZE) ) { + // + // Fill out the packet with tunnels from the tunnel table... + // This effectively means we walk the tunnel table more quickly + // than the session table. This is good because stuffing up a + // tunnel is a much bigger deal than stuffing up a session. + // + int maxsize = (sizeof(tunnelt) < sizeof(bundlet)) ? sizeof(bundlet):sizeof(tunnelt); + maxsize = (sizeof(groupsesst) < maxsize) ? maxsize:sizeof(groupsesst); + maxsize += (sizeof(uint32_t) * 2); + + // Fill out the packet with tunnels,bundlets, groupes from the tables... + while ( (p + maxsize) < (buff + MAX_HEART_SIZE) ) + { + if ((tcount >= config->cluster_highest_tunnelid) && + (bcount >= config->cluster_highest_bundleid) && + (gcount >= config->cluster_highest_groupeid)) + break; - if (!walk_tunnel_number) // tunnel #0 isn't valid. - ++walk_tunnel_number; + if ( ((p + sizeof(uint32_t) * 2 + sizeof(tunnelt) ) < (buff + MAX_HEART_SIZE)) && + (tcount < config->cluster_highest_tunnelid)) + { + if (!walk_tunnel_number) // tunnel #0 isn't valid. + ++walk_tunnel_number; - if (tcount >= config->cluster_highest_tunnelid) - break; + hb_add_type(&p, C_CTUNNEL, walk_tunnel_number); + walk_tunnel_number = (1+walk_tunnel_number)%(config->cluster_highest_tunnelid+1); // +1 avoids divide by zero. - hb_add_type(&p, C_CTUNNEL, walk_tunnel_number); - walk_tunnel_number = (1+walk_tunnel_number)%(config->cluster_highest_tunnelid+1); // +1 avoids divide by zero. + ++tcount; + } - ++tcount; - } + if ( ((p + sizeof(uint32_t) * 2 + sizeof(bundlet) ) < (buff + MAX_HEART_SIZE)) && + (bcount < config->cluster_highest_bundleid)) + { + if (!walk_bundle_number) // bundle #0 isn't valid. + ++walk_bundle_number; - // - // Fill out the packet with bundles from the bundle table... - while ( (p + sizeof(uint32_t) * 2 + sizeof(bundlet) ) < (buff + MAX_HEART_SIZE) ) { + hb_add_type(&p, C_CBUNDLE, walk_bundle_number); + walk_bundle_number = (1+walk_bundle_number)%(config->cluster_highest_bundleid+1); // +1 avoids divide by zero. - if (!walk_bundle_number) // bundle #0 isn't valid. - ++walk_bundle_number; + ++bcount; + } - if (bcount >= config->cluster_highest_bundleid) - break; + if ( ((p + sizeof(uint32_t) * 2 + sizeof(groupsesst) ) < (buff + MAX_HEART_SIZE)) && + (gcount < config->cluster_highest_groupeid)) + { + if (!walk_groupe_number) // groupe #0 isn't valid. + ++walk_groupe_number; - hb_add_type(&p, C_CBUNDLE, walk_bundle_number); - walk_bundle_number = (1+walk_bundle_number)%(config->cluster_highest_bundleid+1); // +1 avoids divide by zero. - ++bcount; - } + hb_add_type(&p, C_CGROUPE, walk_groupe_number); + walk_groupe_number = (1+walk_groupe_number)%(config->cluster_highest_groupeid+1); // +1 avoids divide by zero. + ++gcount; + } + } // // Did we do something wrong? @@ -945,11 +1075,11 @@ void cluster_heartbeat() exit(1); } - LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes " - "(%d x-sess, %d x-bundles, %d x-tunnels, %d highsess, %d highbund, %d hightun, size %d)\n", + LOG(4, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes " + "(%d x-sess, %d x-bundles, %d x-tunnels, %d x-groupes, %d highsess, %d highbund, %d hightun, %d highgrp, size %d)\n", HB_VERSION, h.seq, h.table_version, config->cluster_num_changes, - count, bcount, tcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid, - config->cluster_highest_tunnelid, (int) (p - buff)); + count, bcount, tcount, gcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid, + config->cluster_highest_tunnelid, config->cluster_highest_groupeid, (int) (p - buff)); config->cluster_num_changes = 0; @@ -966,12 +1096,20 @@ static int type_changed(int type, int id) int i; for (i = 0 ; i < config->cluster_num_changes ; ++i) - if ( cluster_changes[i].id == id && - cluster_changes[i].type == type) - return 0; // Already marked for change. + { + if ( cluster_changes[i].id == id && cluster_changes[i].type == type) + { + // Already marked for change, remove it + --config->cluster_num_changes; + memmove(&cluster_changes[i], + &cluster_changes[i+1], + (config->cluster_num_changes - i) * sizeof(cluster_changes[i])); + break; + } + } - cluster_changes[i].type = type; - cluster_changes[i].id = id; + cluster_changes[config->cluster_num_changes].type = type; + cluster_changes[config->cluster_num_changes].id = id; ++config->cluster_num_changes; if (config->cluster_num_changes > MAX_CHANGES) @@ -980,7 +1118,6 @@ static int type_changed(int type, int id) return 1; } - // A particular session has been changed! int cluster_send_session(int sid) { @@ -1008,6 +1145,18 @@ int cluster_send_bundle(int bid) return type_changed(C_CBUNDLE, bid); } +// A particular groupe has been changed! +int cluster_send_groupe(int gid) +{ + if (!config->cluster_iam_master) + { + LOG(0, 0, gid, "I'm not a master, but I just tried to change a groupe!\n"); + return -1; + } + + return type_changed(C_CGROUPE, gid); +} + // A particular tunnel has been changed! int cluster_send_tunnel(int tid) { @@ -1272,6 +1421,31 @@ static int cluster_recv_bundle(int more, uint8_t *p) return 0; } +static int cluster_recv_groupe(int more, uint8_t *p) +{ + if (more >= MAXGROUPE) { + LOG(0, 0, 0, "DANGER: Received a group id > MAXGROUPE!\n"); + return -1; + } + + if (grpsession[more].state == GROUPEUNDEF) { + if (config->cluster_iam_uptodate) { // Sanity. + LOG(0, 0, 0, "I thought I was uptodate but I just found an undefined group!\n"); + } else { + --config->cluster_undefined_groupes; + } + } + + grp_cluster_load_groupe(more, (groupsesst *) p); // Copy groupe into groupe table.. + + LOG(5, 0, more, "Received group update (%d undef)\n", config->cluster_undefined_groupes); + + 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) { @@ -1435,6 +1609,7 @@ static uint8_t *convert_session(struct oldsession *old) // Process a heartbeat.. // // v6: added RADIUS class attribute, re-ordered session structure +// v7: added tunnelt attribute at the end of struct (tunnelt size change) static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t *p, in_addr_t addr) { heartt *h; @@ -1442,11 +1617,11 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t int i, type; int hb_ver = more; -#if HB_VERSION != 6 +#if HB_VERSION != 7 # error "need to update cluster_process_heartbeat()" #endif - // we handle versions 5 through 6 + // we handle versions 5 through 7 if (hb_ver < 5 || 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?? @@ -1567,9 +1742,10 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t memcpy(&past_hearts[i].data, data, size); // Save it. - // 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->highbundle, h->hightunnel); + // Check that we don't have too many undefined sessions, and + // that the free session pointer is correct. + gnextgrpid = h->nextgrpid; + cluster_check_sessions(h->highsession, h->freesession, h->highbundle, h->hightunnel, h->highgroupe); if (h->interval != config->cluster_hb_interval) { @@ -1658,7 +1834,9 @@ 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); - if (size != sizeof(tunnelt) ) { // Ouch! Very very bad! + if ( ((hb_ver >= HB_VERSION) && (size != sizeof(tunnelt))) || + ((hb_ver < HB_VERSION) && (size > sizeof(tunnelt))) ) + { // Ouch! Very very bad! LOG(0, 0, 0, "DANGER: Received a CTUNNEL that didn't decompress correctly!\n"); // Now what? Should exit! No-longer up to date! break; @@ -1705,6 +1883,36 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t p += sizeof(bundle[more]); s -= sizeof(bundle[more]); break; + + case C_CGROUPE: + { // Compressed Groupe structure. + uint8_t c[ sizeof(groupsesst) + 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(groupsesst) ) + { // Ouch! Very very bad! + LOG(0, 0, 0, "DANGER: Received a C_CGROUPE that didn't decompress correctly!\n"); + // Now what? Should exit! No-longer up to date! + break; + } + + cluster_recv_groupe(more, c); + break; + } + case C_GROUPE: + if ( s < sizeof(grpsession[more])) + goto shortpacket; + + cluster_recv_groupe(more, p); + + p += sizeof(grpsession[more]); + s -= sizeof(grpsession[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!! @@ -1780,9 +1988,11 @@ int processcluster(uint8_t *data, int size, in_addr_t addr) else { struct sockaddr_in a; + uint16_t indexudp; a.sin_addr.s_addr = more; - a.sin_port = *(int *) p; + a.sin_port = (*(int *) p) & 0xFFFF; + indexudp = ((*(int *) p) >> 16) & 0xFFFF; s -= sizeof(int); p += sizeof(int); @@ -1797,10 +2007,31 @@ int processcluster(uint8_t *data, int size, in_addr_t addr) processdae(p, s, &a, sizeof(a), &local); } else - processudp(p, s, &a); + processudp(p, s, &a, indexudp); return 0; } + case C_PPPOE_FORWARD: + if (!config->cluster_iam_master) + { + LOG(0, 0, 0, "I'm not the master, but I got a C_PPPOE_FORWARD from %s?\n", fmtaddr(addr, 0)); + return -1; + } + else + { + pppoe_process_forward(p, s, addr); + return 0; + } + + case C_MPPP_FORWARD: + // Receive a MPPP packet from a slave. + if (!config->cluster_iam_master) { + LOG(0, 0, 0, "I'm not the master, but I got a C_MPPP_FORWARD from %s?\n", fmtaddr(addr, 0)); + return -1; + } + + processipout(p, s); + return 0; case C_THROTTLE: { // Receive a forwarded packet from a slave. if (!config->cluster_iam_master) { @@ -1891,12 +2122,14 @@ int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc) 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 groupes undefined of %d", config->cluster_undefined_groupes, config->cluster_highest_groupeid); 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 groupe : %d", config->cluster_highest_groupeid); cli_print(cli, "Highest tunnel : %d", config->cluster_highest_tunnelid); cli_print(cli, "%d changes queued for sending", config->cluster_num_changes); }