X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/e6bb332ba271c0cbedffa131333710e0d95ca06d..20ca0ebdd35c564524faabf0bfea67d662ac5289:/cluster.c diff --git a/cluster.c b/cluster.c index d8a2e68..94d0cd0 100644 --- a/cluster.c +++ b/cluster.c @@ -1,7 +1,5 @@ // L2TPNS Clustering Stuff -char const *cvs_id_cluster = "$Id: cluster.c,v 1.52 2006/06/11 12:46:18 bodea Exp $"; - #include #include #include @@ -23,6 +21,7 @@ char const *cvs_id_cluster = "$Id: cluster.c,v 1.52 2006/06/11 12:46:18 bodea Ex #include "cluster.h" #include "util.h" #include "tbf.h" +#include "pppoe.h" #ifdef BGP #include "bgp.h" @@ -305,10 +304,40 @@ 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. @@ -365,6 +394,28 @@ 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. @@ -402,7 +453,7 @@ 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; + x.undef = config->cluster_undefined_sessions + config->cluster_undefined_tunnels + config->cluster_undefined_bundles; x.basetime = basetime; add_type(&p, C_PING, basetime, (uint8_t *) &x, sizeof(x)); @@ -428,12 +479,6 @@ void master_update_counts(void) 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 3000 sessions; if (config->cluster_highest_sessionid > i) i = config->cluster_highest_sessionid; @@ -522,7 +567,7 @@ void cluster_check_slaves(void) // void cluster_check_master(void) { - int i, count, tcount, bcount, high_unique_id = 0; + int i, count, high_unique_id = 0; int last_free = 0; clockt t = TIME; static int probed = 0; @@ -592,6 +637,7 @@ 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"); @@ -608,7 +654,7 @@ void cluster_check_master(void) // Count the highest used tunnel number as well. // config->cluster_highest_tunnelid = 0; - for (i = 0, tcount = 0; i < MAXTUNNEL; ++i) { + for (i = 0; i < MAXTUNNEL; ++i) { if (tunnel[i].state == TUNNELUNDEF) tunnel[i].state = TUNNELFREE; @@ -621,7 +667,7 @@ void cluster_check_master(void) // Count the highest used bundle number as well. // config->cluster_highest_bundleid = 0; - for (i = 0, bcount = 0; i < MAXBUNDLE; ++i) { + for (i = 0; i < MAXBUNDLE; ++i) { if (bundle[i].state == BUNDLEUNDEF) bundle[i].state = BUNDLEFREE; @@ -940,9 +986,8 @@ void cluster_heartbeat() 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. - + 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; } @@ -954,7 +999,7 @@ void cluster_heartbeat() exit(1); } - LOG(3, 0, 0, "Sending v%d heartbeat #%d, change #%" PRIu64 " with %d changes " + LOG(4, 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", HB_VERSION, h.seq, h.table_version, config->cluster_num_changes, count, bcount, tcount, config->cluster_highest_sessionid, config->cluster_highest_bundleid, @@ -975,12 +1020,20 @@ 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) @@ -989,7 +1042,6 @@ static int type_changed(int type, int id) return 1; } - // A particular session has been changed! int cluster_send_session(int sid) { @@ -1314,54 +1366,62 @@ static int cluster_recv_tunnel(int more, uint8_t *p) } -// pre v5 heartbeat session structure +// pre v6 heartbeat session structure struct oldsession { sessionidt next; sessionidt far; tunnelidt tunnel; + uint8_t flags; + struct { + uint8_t phase; + uint8_t lcp:4; + uint8_t ipcp:4; + uint8_t ipv6cp:4; + uint8_t ccp:4; + } ppp; + char reserved_1[2]; in_addr_t ip; int ip_pool_index; - unsigned long unique_id; - uint16_t nr; - uint16_t ns; + uint32_t unique_id; + char reserved_2[4]; uint32_t magic; - uint32_t cin, cout; uint32_t pin, pout; - uint32_t total_cin; - uint32_t total_cout; - uint32_t id; + uint32_t cin, cout; + uint32_t cin_wrap, cout_wrap; + uint32_t cin_delta, cout_delta; uint16_t throttle_in; uint16_t throttle_out; + uint8_t filter_in; + uint8_t filter_out; + uint16_t mru; clockt opened; clockt die; + uint32_t session_timeout; + uint32_t idle_timeout; time_t last_packet; + time_t last_data; 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]; + uint8_t random_vector[MAXTEL]; + char user[MAXUSER]; 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 + clockt timeout; + uint32_t mrru; + uint8_t mssf; + epdist epdis; + bundleidt bundle; in_addr_t snoop_ip; uint16_t snoop_port; - uint16_t sid; - uint8_t filter_in; - uint8_t filter_out; - char reserved[18]; + uint8_t walled_garden; + uint8_t ipv6prefixlen; + struct in6_addr ipv6route; + char reserved_3[11]; }; static uint8_t *convert_session(struct oldsession *old) @@ -1374,17 +1434,24 @@ static uint8_t *convert_session(struct oldsession *old) new.next = old->next; new.far = old->far; new.tunnel = old->tunnel; - new.flags = old->l2tp_flags; + new.flags = old->flags; + new.ppp.phase = old->ppp.phase; + new.ppp.lcp = old->ppp.lcp; + new.ppp.ipcp = old->ppp.ipcp; + new.ppp.ipv6cp = old->ppp.ipv6cp; + new.ppp.ccp = old->ppp.ccp; 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.cin = old->cin; + new.cout = old->cout; + new.cin_wrap = old->cin_wrap; + new.cout_wrap = old->cout_wrap; + new.cin_delta = old->cin_delta; + new.cout_delta = old->cout_delta; new.throttle_in = old->throttle_in; new.throttle_out = old->throttle_out; new.filter_in = old->filter_in; @@ -1392,7 +1459,10 @@ static uint8_t *convert_session(struct oldsession *old) new.mru = old->mru; new.opened = old->opened; new.die = old->die; + new.session_timeout = old->session_timeout; + new.idle_timeout = old->idle_timeout; new.last_packet = old->last_packet; + new.last_data = old->last_data; new.dns1 = old->dns1; new.dns2 = old->dns2; new.tbf_in = old->tbf_in; @@ -1400,9 +1470,16 @@ static uint8_t *convert_session(struct oldsession *old) 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.timeout = old->timeout; + new.mrru = old->mrru; + new.mssf = old->mssf; + new.epdis = old->epdis; + new.bundle = old->bundle; new.snoop_ip = old->snoop_ip; new.snoop_port = old->snoop_port; new.walled_garden = old->walled_garden; + new.ipv6prefixlen = old->ipv6prefixlen; + new.ipv6route = old->ipv6route; memcpy(new.random_vector, old->random_vector, sizeof(new.random_vector)); memcpy(new.user, old->user, sizeof(new.user)); @@ -1412,30 +1489,14 @@ static uint8_t *convert_session(struct oldsession *old) 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 +// 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; @@ -1443,17 +1504,21 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t int i, type; int hb_ver = more; -#if HB_VERSION != 5 +#if HB_VERSION != 7 # error "need to update cluster_process_heartbeat()" #endif - // we handle versions 3 through 5 - if (hb_ver < 3 || hb_ver > HB_VERSION) { + // 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?? } - // 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; @@ -1473,18 +1538,17 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t return -1; // Skip it. } - 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", + 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); - kill(0, SIGTERM); - exit(1); - } - if (h->table_version < config->cluster_table_version) - return -1; + kill(0, SIGTERM); + exit(1); } + if (h->table_version < config->cluster_table_version) + return -1; + if (basetime > h->basetime) { LOG(0, 0, 0, "They're an older master than me so I'm gone!\n"); kill(0, SIGTERM); @@ -1606,7 +1670,7 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t s -= (p - orig_p); // session struct changed with v5 - if (hb_ver < 5) + if (hb_ver < 6) { if (size != sizeof(struct oldsession)) { LOG(0, 0, 0, "DANGER: Received a v%d CSESSION that didn't decompress correctly!\n", hb_ver); @@ -1627,7 +1691,7 @@ static int cluster_process_heartbeat(uint8_t *data, int size, int more, uint8_t break; } case C_SESSION: - if (hb_ver < 5) + if (hb_ver < 6) { if (s < sizeof(struct oldsession)) goto shortpacket; @@ -1656,7 +1720,9 @@ 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; @@ -1770,7 +1836,7 @@ int processcluster(uint8_t *data, int size, in_addr_t addr) 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", + 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)); return -1; @@ -1778,9 +1844,11 @@ 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); @@ -1795,10 +1863,31 @@ 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) { @@ -1865,7 +1954,7 @@ shortpacket: //==================================================================================================== -int cmd_show_cluster(struct cli_def *cli, char *command, char **argv, int argc) +int cmd_show_cluster(struct cli_def *cli, const char *command, char **argv, int argc) { int i;