/* * BIRD -- Simple Network Management Protocol (SNMP) * BGP4-MIB bgpPeerTable * * (c) 2022 Vojtech Vilimek * (c) 2022 CZ.NIC z.s.p.o * * Can be freely distributed and used under the terms of the GNU GPL. */ /* BGP_MIB states see enum BGP_INTERNAL_STATES */ #include "snmp.h" #include "snmp_utils.h" #include "subagent.h" #include "bgp_mib.h" static const char * const debug_bgp_states[] UNUSED = { [BGP_INTERNAL_INVALID] = "BGP_INTERNAL_INVALID", [BGP_INTERNAL_BGP] = "BGP_INTERNAL_BGP", [BGP_INTERNAL_VERSION] = "BGP_INTERNAL_VERSION", [BGP_INTERNAL_LOCAL_AS] = "BGP_INTERNAL_LOCAL_AS", [BGP_INTERNAL_PEER_TABLE] = "BGP_INTERNAL_PEER_TABLE", [BGP_INTERNAL_PEER_ENTRY] = "BGP_INTERNAL_PEER_ENTRY", [BGP_INTERNAL_IDENTIFIER] = "BGP_INTERNAL_IDENTIFIER", [BGP_INTERNAL_STATE] = "BGP_INTERNAL_STATE", [BGP_INTERNAL_ADMIN_STATUS] = "BGP_INTERNAL_ADMIN_STATUS", [BGP_INTERNAL_NEGOTIATED_VERSION] = "BGP_INTERNAL_NEGOTIATED_VERSION", [BGP_INTERNAL_LOCAL_ADDR] = "BGP_INTERNAL_LOCAL_ADDR", [BGP_INTERNAL_LOCAL_PORT] = "BGP_INTERNAL_LOCAL_PORT", [BGP_INTERNAL_REMOTE_ADDR] = "BGP_INTERNAL_REMOTE_ADDR", [BGP_INTERNAL_REMOTE_PORT] = "BGP_INTERNAL_REMOTE_PORT", [BGP_INTERNAL_REMOTE_AS] = "BGP_INTERNAL_REMOTE_AS", [BGP_INTERNAL_RX_UPDATES] = "BGP_INTERNAL_RX_UPDATES", [BGP_INTERNAL_TX_UPDATES] = "BGP_INTERNAL_TX_UPDATES", [BGP_INTERNAL_RX_MESSAGES] = "BGP_INTERNAL_RX_MESSAGES", [BGP_INTERNAL_TX_MESSAGES] = "BGP_INTERNAL_TX_MESSAGES", [BGP_INTERNAL_LAST_ERROR] = "BGP_INTERNAL_LAST_ERROR", [BGP_INTERNAL_FSM_TRANSITIONS] = "BGP_INTERNAL_FSM_TRANSITIONS", [BGP_INTERNAL_FSM_ESTABLISHED_TIME] = "BGP_INTERNAL_FSM_ESTABLISHED_TIME", [BGP_INTERNAL_RETRY_INTERVAL] = "BGP_INTERNAL_RETRY_INTERVAL", [BGP_INTERNAL_HOLD_TIME] = "BGP_INTERNAL_HOLD_TIME", [BGP_INTERNAL_KEEPALIVE] = "BGP_INTERNAL_KEEPALIVE", [BGP_INTERNAL_HOLD_TIME_CONFIGURED] = "BGP_INTERNAL_HOLD_TIME_CONFIGURED", [BGP_INTERNAL_KEEPALIVE_CONFIGURED] = "BGP_INTERNAL_KEEPALIVE_CONFIGURED", [BGP_INTERNAL_ORIGINATION_INTERVAL] = "BGP_INTERNAL_ORIGINATION_INTERVAL", [BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT] = "BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT", [BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME] = "BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME", [BGP_INTERNAL_END] = "BGP_INTERNAL_END", [BGP_INTERNAL_NO_VALUE] = "BGP_INTERNAL_NO_VALUE", }; void snmp_bgp_register(struct snmp_proto *p) { snmp_log("snmp_bgp_register()"); u32 bgp_mib_prefix[] = {1, 15, 1}; { /* registering whole BGP4-MIB subtree */ //snmp_log("snmp_proto %p (%p)", p, p->p.pool); struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB); struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(2)); put_u8(&oid->n_subid, 2); put_u8(&oid->prefix, 2); memcpy(oid->ids, bgp_mib_prefix, 2 * sizeof(u32)); registering->oid = oid; add_tail(&p->register_queue, ®istering->n); p->register_to_ack++; snmp_register(p, oid, 0, 1); } /* // TODO squash bgpVersion and bgpLocalAs to one PDU { / * registering BGP4-MIB::bgpVersion * / //snmp_log("snmp_proto %p (%p)", p, p->p.pool); struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB); struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3)); put_u8(&oid->n_subid, 3); put_u8(&oid->prefix, 2); memcpy(oid->ids, bgp_mib_prefix, 3 * sizeof(u32)); registering->oid = oid; add_tail(&p->register_queue, ®istering->n); p->register_to_ack++; snmp_register(p, oid, 0, 1); } { / * registering BGP4-MIB::bgpLocalAs * / struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB); struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3)); put_u8(&oid->n_subid, 3); put_u8(&oid->prefix, 2); memcpy(oid->ids, bgp_mib_prefix, 2 * sizeof(u32)); STORE(oid->ids[2], 2); registering->oid = oid; add_tail(&p->register_queue, ®istering->n); p->register_to_ack++; snmp_register(p, oid, 0, 1); } { / * registering BGP4-MIB::bgpPeerTable * / struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB); struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(3)); put_u8(&oid->n_subid, 3); put_u8(&oid->prefix, 2); memcpy(oid->ids, bgp_mib_prefix, 2 * sizeof(u32)); STORE(oid->ids[2], 3); registering->oid = oid; add_tail(&p->register_queue, ®istering->n); p->register_to_ack++; snmp_register(p, oid, 0, 1); } / * register dynamic BGP4-MIB::bgpPeerEntry.* * / u32 bgp_peer_entry[] = { 1, 15, 3, 1, 1}; snmp_log("before hash walk - registering dynamic parts"); HASH_WALK(p->bgp_hash, next, peer) { struct snmp_register *registering = snmp_register_create(p, SNMP_BGP4_MIB); struct oid *oid = mb_alloc(p->p.pool, snmp_oid_sizeof(10)); put_u8(&oid->n_subid, 9); put_u8(&oid->prefix, 2); memcpy(oid->ids, bgp_peer_entry, 5 * sizeof(u32)); snmp_oid_ip4_index(oid, 5, ipa_to_ip4(peer->peer_ip)); registering->oid = oid; add_tail(&p->register_queue, ®istering->n); snmp_register(p, oid, 0, 1); } HASH_WALK_END; snmp_log("after hash walk"); */ } static int snmp_bgp_valid_ip4(struct oid *o) { return snmp_valid_ip4_index(o, 5); } static u8 bgp_get_candidate(u32 field) { const u8 translation_table[] = { [SNMP_BGP_IDENTIFIER] = BGP_INTERNAL_IDENTIFIER, [SNMP_BGP_STATE] = BGP_INTERNAL_STATE, [SNMP_BGP_ADMIN_STATUS] = BGP_INTERNAL_ADMIN_STATUS, [SNMP_BGP_NEGOTIATED_VERSION] = BGP_INTERNAL_NEGOTIATED_VERSION, [SNMP_BGP_LOCAL_ADDR] = BGP_INTERNAL_LOCAL_ADDR, [SNMP_BGP_LOCAL_PORT] = BGP_INTERNAL_LOCAL_PORT, [SNMP_BGP_REMOTE_ADDR] = BGP_INTERNAL_REMOTE_ADDR, [SNMP_BGP_REMOTE_PORT] = BGP_INTERNAL_REMOTE_PORT, [SNMP_BGP_REMOTE_AS] = BGP_INTERNAL_REMOTE_AS, [SNMP_BGP_RX_UPDATES] = BGP_INTERNAL_RX_UPDATES, [SNMP_BGP_TX_UPDATES] = BGP_INTERNAL_TX_UPDATES, [SNMP_BGP_RX_MESSAGES] = BGP_INTERNAL_RX_MESSAGES, [SNMP_BGP_TX_MESSAGES] = BGP_INTERNAL_TX_MESSAGES, [SNMP_BGP_LAST_ERROR] = BGP_INTERNAL_LAST_ERROR, [SNMP_BGP_FSM_TRANSITIONS] = BGP_INTERNAL_FSM_TRANSITIONS, [SNMP_BGP_FSM_ESTABLISHED_TIME] = BGP_INTERNAL_FSM_ESTABLISHED_TIME, [SNMP_BGP_RETRY_INTERVAL] = BGP_INTERNAL_RETRY_INTERVAL, [SNMP_BGP_HOLD_TIME] = BGP_INTERNAL_HOLD_TIME, [SNMP_BGP_KEEPALIVE] = BGP_INTERNAL_KEEPALIVE, [SNMP_BGP_HOLD_TIME_CONFIGURED] = BGP_INTERNAL_HOLD_TIME_CONFIGURED, [SNMP_BGP_KEEPALIVE_CONFIGURED] = BGP_INTERNAL_KEEPALIVE_CONFIGURED, [SNMP_BGP_ORIGINATION_INTERVAL] = BGP_INTERNAL_ORIGINATION_INTERVAL, [SNMP_BGP_MIN_ROUTE_ADVERTISEMENT] = BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT, [SNMP_BGP_IN_UPDATE_ELAPSED_TIME] = BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME, }; /* first value is in secord cell of array translation_table (as the * SNMP_BPG_IDENTIFIER == 1 */ if (field > 0 && field < sizeof(translation_table) / sizeof(translation_table[0])) return translation_table[field]; else return BGP_INTERNAL_NO_VALUE; } static inline struct ip4_addr ip4_from_oid(const struct oid *o) { return (o->n_subid == 9) ? ip4_build(o->ids[5], o->ids[6], o->ids[7], o->ids[8]) : ip4_from_u32(0xFFFFFFFF); } static void print_bgp_record(struct bgp_config *config) { struct proto_config *cf = (struct proto_config *) config; // struct proto *P = cf->proto; struct bgp_proto *bgp_proto = (struct bgp_proto *) cf->proto; struct bgp_conn *conn = bgp_proto->conn; snmp_log(" name: %s", cf->name); snmp_log(""); snmp_log(" rem. identifier: %u", bgp_proto->remote_id); snmp_log(" local ip: %I", config->local_ip); snmp_log(" remote ip: %I", config->remote_ip); snmp_log(" local port: %u", config->local_port); snmp_log(" remote port: %u", config->remote_port); // crashes ? if (conn) { snmp_log(" state: %u", conn->state); snmp_log(" remote as: %u", conn->remote_caps->as4_number); } snmp_log(" in updates: %u", bgp_proto->stats.rx_updates); snmp_log(" out updates: %u", bgp_proto->stats.tx_updates); snmp_log(" in total: %u", bgp_proto->stats.rx_messages); snmp_log(" out total: %u", bgp_proto->stats.tx_messages); snmp_log(" fsm transitions: %u", bgp_proto->stats.fsm_established_transitions); // not supported yet snmp_log(" fsm total time: --"); snmp_log(" retry interval: %u", config->connect_retry_time); snmp_log(" hold configurated: %u", config->hold_time ); snmp_log(" keep alive config: %u", config->keepalive_time ); // unknown snmp_log(" min AS origin. int.: --"); snmp_log(" min route advertisement: %u", 0 ); snmp_log(" in update elapsed time: %u", 0 ); if (!conn) snmp_log(" no connection established"); snmp_log(" outgoinin_conn state %u", bgp_proto->outgoing_conn.state + 1); snmp_log(" incoming_conn state: %u", bgp_proto->incoming_conn.state + 1); } static void print_bgp_record_all(struct snmp_proto *p) { snmp_log("dumping watched bgp status"); HASH_WALK(p->bgp_hash, next, peer) { print_bgp_record(peer->config); } HASH_WALK_END; snmp_log("dumping watched end"); } /** * snmp_bgp_state - linearize oid from BGP4-MIB * @oid: prefixed object identifier from BGP4-MIB::bgp subtree * * Returns linearized state for Get-PDU, GetNext-PDU and GetBulk-PDU packets. */ u8 snmp_bgp_state(struct oid *oid) { /* already checked: xxxxxxxx p * (*oid): .1.3.6.1.2.1.15 * -> BGP4-MIB::bgp (root) */ u8 state = BGP_INTERNAL_NO_VALUE; u8 candidate; switch (oid->n_subid) { default: if (oid->n_subid < 2) { state = BGP_INTERNAL_INVALID; break; } /* else oid->n_subid >= 2 */ /* fall through */ /* between ids[5] and ids[8] (n_subid == 9) should be IP address * validity is checked later in execution because * this field also could mean a query boundry (upper or lower) */ case 9: case 8: case 7: case 6: case 5: state = bgp_get_candidate(oid->ids[4]); /* fall through */ case 4: if (oid->ids[3] == BGP4_PEER_ENTRY) state = (state == BGP_INTERNAL_NO_VALUE) ? BGP_INTERNAL_PEER_ENTRY : state; else state = BGP_INTERNAL_NO_VALUE; /* fall through */ case 3: /* u8 candidate; */ switch (oid->ids[2]) { case SNMP_BGP_VERSION: state = BGP_INTERNAL_VERSION; break; case SNMP_BGP_LOCAL_AS: state = BGP_INTERNAL_LOCAL_AS; break; case SNMP_BGP_PEER_TABLE: /* candidate avoid overriding more specific state */ candidate = BGP_INTERNAL_PEER_TABLE; break; default: /* test fails */ /* invalidate the state forcefully */ if (oid->ids[2] < SNMP_BGP_VERSION) { state = BGP_INTERNAL_NO_VALUE; candidate = BGP_INTERNAL_NO_VALUE; } else /* oid->ids[2] > SNMP_BGP_PEER_TABLE */ state = BGP_INTERNAL_END; } state = (state == BGP_INTERNAL_NO_VALUE) ? candidate : state; /* fall through */ case 2: /* bare BGP4-MIB::bgp */ if (state == BGP_INTERNAL_NO_VALUE || state == BGP_INTERNAL_INVALID) state = BGP_INTERNAL_BGP; } return state; } static inline int is_dynamic(u8 state) { return (state >= BGP_INTERNAL_IDENTIFIER && state <= BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME); } static inline int snmp_bgp_has_value(u8 state) { if (state <= BGP_INTERNAL_BGP || state == BGP_INTERNAL_PEER_TABLE || state == BGP_INTERNAL_PEER_ENTRY || /* unsupported fields */ state == BGP_INTERNAL_FSM_ESTABLISHED_TIME || state == BGP_INTERNAL_ORIGINATION_INTERVAL || state == BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT || state == BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME) return 0; /* hasn't value */ else return 1; /* has value */ } /** * snmp_bgp_get_valid - only states with valid value * @state: BGP linearized state * * Returns @state if has value in BGP4-MIB, zero otherwise. Used for Get-PDU * ackets. */ u8 snmp_bgp_get_valid(u8 state) { /* invalid * SNMP_BGP SNMP_BGP_PEER_TABLE SNMP_BGP_PEER_ENTRY * SNMP_BGP_FSM_ESTABLISHED_TIME SNMP_BGP_IN_UPDATE_ELAPSED_TIME */ if (state == 1 || state == 4 || state == 5 || state == 21 || state == 29) return 0; else return state; } /** * snmp_bgp_next_state - next state that has value * @state: BGP linearized state * * Returns successor state of @state with valid value in BG4-MIB. Used for * GetNext-PDU and GetBulk-PDU packets. */ u8 snmp_bgp_next_state(u8 state) { switch (state) { case BGP_INTERNAL_LOCAL_AS: case BGP_INTERNAL_PEER_TABLE: case BGP_INTERNAL_PEER_ENTRY: return BGP_INTERNAL_IDENTIFIER; case BGP_INTERNAL_FSM_TRANSITIONS: case BGP_INTERNAL_FSM_ESTABLISHED_TIME: return BGP_INTERNAL_RETRY_INTERVAL; case BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME: case BGP_INTERNAL_END: return BGP_INTERNAL_END; default: return state + 1; } } int snmp_bgp_is_supported(struct oid *o) { /* most likely not functioning */ if (o->prefix == 2 && o->n_subid > 0 && o->ids[0] == 1) { if (o->n_subid == 2 && o->ids[1] == BGP4_MIB_VERSION || o->ids[1] == BGP4_MIB_LOCAL_AS) return 1; else if (o->n_subid > 2 && o->ids[1] == BGP4_PEER_TABLE && o->ids[2] == BGP4_PEER_ENTRY) { if (o->n_subid == 3) return 1; if (o->n_subid == 8 && o->ids[3] > 0 && /* do not include bgpPeerInUpdatesElapsedTime and bgpPeerFsmEstablishedTime */ o->ids[3] < SNMP_BGP_IN_UPDATE_ELAPSED_TIME && o->ids[3] != SNMP_BGP_FSM_ESTABLISHED_TIME) return 1; } else return 0; } return 0; } static struct oid * update_bgp_oid(struct oid *oid, u8 state) { ASSERT (state != BGP_INTERNAL_INVALID); ASSERT (state != BGP_INTERNAL_NO_VALUE); ASSERT (state != BGP_INTERNAL_END); /* if same state, no need to realloc anything */ if (snmp_bgp_state(oid) == state) return oid; switch (state) { case BGP_INTERNAL_BGP: /* could destroy same old data */ oid = mb_realloc(oid, snmp_oid_sizeof(2)); oid->n_subid = 2; oid->ids[0] = 1; oid->ids[1] = SNMP_BGP4_MIB; break; case BGP_INTERNAL_VERSION: oid = mb_realloc(oid, snmp_oid_sizeof(3)); oid->n_subid = 3; oid->ids[2] = SNMP_BGP_VERSION; break; case BGP_INTERNAL_LOCAL_AS: oid->ids[2] = 2; break; case BGP_INTERNAL_IDENTIFIER: oid = mb_realloc(oid, snmp_oid_sizeof(9)); oid->n_subid = 9; oid->ids[2] = SNMP_BGP_PEER_TABLE; oid->ids[3] = SNMP_BGP_PEER_ENTRY; oid->ids[4] = SNMP_BGP_IDENTIFIER; /* zero the ip */ oid->ids[5] = oid->ids[6] = oid->ids[7] = oid->ids[8] = 0; break; #define SNMP_UPDATE_CASE(num, update) \ case num: \ oid->ids[4] = update; \ break; SNMP_UPDATE_CASE(BGP_INTERNAL_STATE, SNMP_BGP_STATE) SNMP_UPDATE_CASE(BGP_INTERNAL_ADMIN_STATUS, SNMP_BGP_ADMIN_STATUS) SNMP_UPDATE_CASE(BGP_INTERNAL_NEGOTIATED_VERSION, SNMP_BGP_NEGOTIATED_VERSION) SNMP_UPDATE_CASE(BGP_INTERNAL_LOCAL_ADDR, SNMP_BGP_LOCAL_ADDR) SNMP_UPDATE_CASE(BGP_INTERNAL_LOCAL_PORT, SNMP_BGP_LOCAL_PORT) SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_ADDR, SNMP_BGP_REMOTE_ADDR) SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_PORT, SNMP_BGP_REMOTE_PORT) SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_AS, SNMP_BGP_REMOTE_AS) SNMP_UPDATE_CASE(BGP_INTERNAL_RX_UPDATES, SNMP_BGP_RX_UPDATES) SNMP_UPDATE_CASE(BGP_INTERNAL_TX_UPDATES, SNMP_BGP_TX_UPDATES) SNMP_UPDATE_CASE(BGP_INTERNAL_RX_MESSAGES, SNMP_BGP_RX_MESSAGES) SNMP_UPDATE_CASE(BGP_INTERNAL_TX_MESSAGES, SNMP_BGP_TX_MESSAGES) SNMP_UPDATE_CASE(BGP_INTERNAL_LAST_ERROR, SNMP_BGP_LAST_ERROR) SNMP_UPDATE_CASE(BGP_INTERNAL_FSM_TRANSITIONS, SNMP_BGP_FSM_TRANSITIONS) SNMP_UPDATE_CASE(BGP_INTERNAL_FSM_ESTABLISHED_TIME, SNMP_BGP_FSM_ESTABLISHED_TIME) SNMP_UPDATE_CASE(BGP_INTERNAL_RETRY_INTERVAL, SNMP_BGP_RETRY_INTERVAL) SNMP_UPDATE_CASE(BGP_INTERNAL_HOLD_TIME, SNMP_BGP_HOLD_TIME) SNMP_UPDATE_CASE(BGP_INTERNAL_KEEPALIVE, SNMP_BGP_KEEPALIVE) SNMP_UPDATE_CASE(BGP_INTERNAL_HOLD_TIME_CONFIGURED, SNMP_BGP_HOLD_TIME_CONFIGURED) SNMP_UPDATE_CASE(BGP_INTERNAL_KEEPALIVE_CONFIGURED, SNMP_BGP_KEEPALIVE_CONFIGURED) SNMP_UPDATE_CASE(BGP_INTERNAL_ORIGINATION_INTERVAL, SNMP_BGP_ORIGINATION_INTERVAL) SNMP_UPDATE_CASE(BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT, SNMP_BGP_MIN_ROUTE_ADVERTISEMENT) SNMP_UPDATE_CASE(BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME, SNMP_BGP_IN_UPDATE_ELAPSED_TIME) } return oid; #undef SNMP_UPDATE_CASE } // TODO test bgp_find_dynamic_oid static struct oid * bgp_find_dynamic_oid(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, u8 state UNUSED) { snmp_log("bgp_find_dynamic_oid()"); ip4_addr ip4 = ip4_from_oid(o_start); /* dest is 255.255.255.255 if o_end is empty */ ip4_addr dest = ip4_from_oid(o_end); snmp_log("ip addresses build (ip4) %I (dest) %I", ipa_from_ip4(ip4), ipa_from_ip4(dest)); // why am I allocated dynamically ?! net_addr *net = mb_allocz(p->p.pool, sizeof(struct net_addr)); net_fill_ip4(net, ip4, IP4_MAX_PREFIX_LENGTH); snmp_log("dynamic part of BGP mib"); // why am I allocated dynamically ?! struct f_trie_walk_state *ws = mb_allocz(p->p.pool, sizeof(struct f_trie_walk_state)); trie_walk_init(ws, p->bgp_trie, NULL); snmp_log("walk init"); if (trie_walk_next(ws, net)) // && ip4_less(net4_prefix(net), dest)) { snmp_log("trie_walk_next() returned true"); /* * if the o_end is empty then there are no conditions on the ip4 addr */ int cmp = ip4_compare(net4_prefix(net), dest); if (cmp < 0 || (cmp == 0 && snmp_is_oid_empty(o_end))) { snmp_log("ip4_less() returned true"); struct oid *o = mb_allocz(p->p.pool, snmp_oid_sizeof(9)); o->n_subid = 9; memcpy(o, o_start, snmp_oid_size(o_start)); snmp_oid_ip4_index(o, 5, net4_prefix(net)); mb_free(net); mb_free(ws); return o; } // delete me else { snmp_log("ip4_less() returned false for %I >= %I", net4_prefix(net), dest); mb_free(net); mb_free(ws); } // delete me end } else { snmp_log("trie_walk_next() returned false, cleaning"); mb_free(net); mb_free(ws); } return NULL; } static struct oid * search_bgp_dynamic(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, uint contid UNUSED, u8 current_state) { snmp_log("search_bgp_dynamic() dynamic part Yaaay!"); /* TODO can be remove after implementing all BGP4-MIB::bgpPeerTable columns */ u8 next_state = current_state; struct oid *o_copy = o_start; do { snmp_log("do-while state %u", next_state); snmp_oid_dump(o_start); o_start = o_copy = update_bgp_oid(o_copy, next_state); o_start = bgp_find_dynamic_oid(p, o_start, o_end, next_state); snmp_log("found"); snmp_oid_dump(o_start); next_state = snmp_bgp_next_state(next_state); snmp_log("looping"); } while (o_start == NULL && next_state < BGP_INTERNAL_END); return o_start; } /* o_start could be o_curr, but has basically same meaning for searching */ struct oid * search_bgp_mib(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, uint contid UNUSED) { u8 start_state = snmp_bgp_state(o_start); //u8 state_curr = snmp_bgp_state(o_start); //u8 state_end = (o_end) ? snmp_bgp_state(o_end) : 0; // print debugging information print_bgp_record_all(p); if (o_start->include && snmp_bgp_has_value(start_state) && !is_dynamic(start_state) && o_start->n_subid == 3) { snmp_log("search_bgp_mib() first search element (due to include field) returned"); o_start->include = 0; /* disable including for next time */ return o_start; } else if (o_start->include && snmp_bgp_has_value(start_state) && is_dynamic(start_state)) { snmp_log("search_bgp_mib() first search element matched dynamic entry!"); return search_bgp_dynamic(p, o_start, o_end, contid, start_state); } /* o_start is not inclusive */ u8 next_state = snmp_bgp_next_state(start_state); // TODO more checks ?!? if (!is_dynamic(next_state)) { o_start = update_bgp_oid(o_start, next_state); snmp_log("next state is also not dynamic"); //snmp_oid_dump(o_start); return o_start; } /* is_dynamic(next_state) == 1 */ return search_bgp_dynamic(p, o_start, o_end, 0, next_state); // // TODO readable rewrite // /* if state is_dynamic() then has more value and need find the right one */ // else if (!is_dynamic(start_state)) // { // snmp_log("seach_bgp_mib() static part"); // u8 next_state = snmp_bgp_next_state(start_state); // snmp_log(" bgp states old %u new %u", start_state, next_state); // snmp_oid_dump(o_start); // o_start = update_bgp_oid(o_start, next_state); // snmp_oid_dump(o_start); // // snmp_log("search_bgp_mib() is NOT next_state dynamic %s", // !is_dynamic(next_state) ? "true" : "false"); // // if (!is_dynamic(next_state)) // return o_start; // // else // /* no need to check that retval < o_end -- done by bgp_find_dynamic_oid() */ // return search_bgp_dynamic(p, o_start, o_end, 0, next_state); // } // // /* no need to check that retval < o_end -- done by bgp_find_dynamic_oid() */ // return search_bgp_dynamic(p, o_start, o_end, 0, start_state); } static byte * bgp_fill_dynamic(struct snmp_proto *p, struct agentx_varbind *vb, byte *pkt, uint size UNUSED, uint contid UNUSED, int byte_ord UNUSED, u8 state) { //snmp_log("bgp_fill_dynamic() valid ip %s", snmp_bgp_valid_ip4(oid) ? "true" : "false"); struct oid *oid = &vb->name; ip_addr addr; if (snmp_bgp_valid_ip4(oid)) addr = ipa_from_ip4(ip4_from_oid(oid)); else { vb->type = AGENTX_NO_SUCH_OBJECT; return pkt; } snmp_log(" -> ip addr %I", addr); // TODO XXX deal with possible change of (remote) ip struct snmp_bgp_peer *pe = HASH_FIND(p->bgp_hash, SNMP_HASH, addr); struct bgp_proto *bgp_proto = NULL; struct proto *proto = NULL; if (pe) { proto = ((struct proto_config *) pe->config)->proto; if (proto->proto == &proto_bgp && ipa_equal(addr, ((struct bgp_proto *) proto)->remote_ip)) { bgp_proto = (struct bgp_proto *) proto; snmp_log("bgp_dynamic_fill() using bgp_proto %p", bgp_proto); } /* binded bgp protocol not found */ else { die("Binded bgp protocol not found!"); vb->type = AGENTX_NO_SUCH_OBJECT; return pkt; } } else { vb->type = AGENTX_NO_SUCH_OBJECT; return pkt; } struct bgp_conn *bgp_conn = bgp_proto->conn; struct bgp_conn *bgp_in = &bgp_proto->incoming_conn; struct bgp_conn *bgp_out = &bgp_proto->outgoing_conn; struct bgp_stats *bgp_stats = &bgp_proto->stats; const struct bgp_config *bgp_conf = bgp_proto->cf; uint bgp_state; if (bgp_conn) bgp_state = bgp_conn->state; else if (MAX(bgp_in->state, bgp_out->state) == BS_CLOSE && MIN(bgp_in->state, bgp_out->state) != BS_CLOSE) bgp_state = MIN(bgp_in->state, bgp_out->state); else if (MIN(bgp_in->state, bgp_out->state) == BS_CLOSE) bgp_state = BS_IDLE; else bgp_state = MAX(bgp_in->state, bgp_out->state); btime now; switch (state) { case BGP_INTERNAL_IDENTIFIER: if (bgp_state == BS_OPENCONFIRM || bgp_state == BS_ESTABLISHED) { snmp_put_ip4(pkt, bgp_proto->remote_ip); pkt += 4; /* the inserted ip has size 8 bytes, the BGP_DATA will increment by 4B */ BGP_DATA(vb, AGENTX_IP_ADDRESS, pkt); } else { snmp_put_blank(pkt); /* stores 4B of zeroes */ BGP_DATA(vb, AGENTX_IP_ADDRESS, pkt); } break; case BGP_INTERNAL_STATE: STORE_PTR(pkt, bgp_state); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_ADMIN_STATUS: /* struct proto ~ (struct proto *) bgp_proto */ if (proto->disabled) STORE_PTR(pkt, AGENTX_ADMIN_STOP); else STORE_PTR(pkt, AGENTX_ADMIN_START); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_NEGOTIATED_VERSION: if (bgp_state == BS_OPENCONFIRM || bgp_state == BS_ESTABLISHED) STORE_PTR(pkt, 4); // TODO replace with MACRO else STORE_PTR(pkt, 0); /* zero dictated by rfc */ BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_LOCAL_ADDR: // TODO XXX bgp_proto->link_addr & zero local_ip snmp_put_ip4(pkt, bgp_proto->local_ip); pkt += 4; /* the inserted ip has size 8 bytes, the BGP_DATA will increment by 4B */ BGP_DATA(vb, AGENTX_IP_ADDRESS, pkt); break; case BGP_INTERNAL_LOCAL_PORT: STORE_PTR(pkt, bgp_conf->local_port); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_REMOTE_ADDR: snmp_put_ip4(pkt, bgp_proto->remote_ip); pkt += 4; /* the inserted ip has size 8 bytes, the BGP_DATA will increment by 4B */ BGP_DATA(vb, AGENTX_IP_ADDRESS, pkt); break; case BGP_INTERNAL_REMOTE_PORT: STORE_PTR(pkt, bgp_conf->remote_port); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_REMOTE_AS: STORE_PTR(pkt, bgp_proto->remote_as); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; /* IN UPDATES */ case BGP_INTERNAL_RX_UPDATES: STORE_PTR(pkt, bgp_stats->rx_updates); BGP_DATA(vb, AGENTX_COUNTER_32, pkt); break; /* OUT UPDATES */ case BGP_INTERNAL_TX_UPDATES: STORE_PTR(pkt, bgp_stats->tx_updates); BGP_DATA(vb, AGENTX_COUNTER_32, pkt); break; /* IN MESSAGES */ case BGP_INTERNAL_RX_MESSAGES: STORE_PTR(pkt, bgp_stats->rx_messages); BGP_DATA(vb, AGENTX_COUNTER_32, pkt); break; /* OUT MESSAGES */ case BGP_INTERNAL_TX_MESSAGES: STORE_PTR(pkt, bgp_stats->tx_messages); BGP_DATA(vb, AGENTX_COUNTER_32, pkt); break; case BGP_INTERNAL_LAST_ERROR: STORE_PTR(pkt, 2); pkt += 4; if (bgp_proto->last_error_code) { /* force network order */ put_u32(pkt, bgp_proto->last_error_code & 0x00FF0000 << 8 | bgp_proto->last_error_code & 0x000000FF << 24); } else snmp_put_blank(pkt); BGP_DATA(vb, AGENTX_OCTET_STRING, pkt); break; // TODO finish me here case BGP_INTERNAL_FSM_TRANSITIONS: STORE_PTR(pkt, bgp_stats->fsm_established_transitions); BGP_DATA(vb, AGENTX_COUNTER_32, pkt); break; case BGP_INTERNAL_FSM_ESTABLISHED_TIME: break; case BGP_INTERNAL_RETRY_INTERVAL: // retry interval != 0 STORE_PTR(pkt, bgp_conf->connect_retry_time); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_HOLD_TIME: // (0, 3..65535) STORE_PTR(pkt, bgp_conn->hold_time); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_KEEPALIVE: STORE_PTR(pkt, bgp_conn->keepalive_time); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_HOLD_TIME_CONFIGURED: STORE_PTR(pkt, bgp_conf->hold_time); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_KEEPALIVE_CONFIGURED: STORE_PTR(pkt, bgp_conf->keepalive_time); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; // finish me here case BGP_INTERNAL_ORIGINATION_INTERVAL: break; case BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT: break; case BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME: now = current_time(); STORE_PTR(pkt, (now - bgp_proto->last_rx_update) TO_S ); BGP_DATA(vb, AGENTX_GAUGE_32, pkt); break; case BGP_INTERNAL_END: break; case BGP_INTERNAL_INVALID: break; case BGP_INTERNAL_BGP: break; case BGP_INTERNAL_PEER_TABLE: break; case BGP_INTERNAL_PEER_ENTRY: break; case BGP_INTERNAL_NO_VALUE: break; } return pkt; } static byte * bgp_fill_static(struct snmp_proto *p, struct agentx_varbind *vb, byte *pkt, uint size UNUSED, uint contid UNUSED, int byte_ord UNUSED, u8 state) { snmp_log("snmp bgp_fill_static ()\n"); byte *temp = pkt; struct oid *oid = &vb->name; /* snmp_bgp_state() check only prefix. To be sure on oid equivalence we need to * compare the oid->n_subid length. All BGP static fields have same n_subid. */ if (oid->n_subid != 3) { vb->type = AGENTX_NO_SUCH_OBJECT; return pkt; } switch (state) { case BGP_INTERNAL_VERSION: STORE_PTR(pkt, 1); /* store string len */ pkt += 4; STORE_PTR(pkt, BGP4_VERSIONS); /* real size is 8 but we already shifted the pkt by 4 */ BGP_DATA(vb, AGENTX_OCTET_STRING, pkt); break; case BGP_INTERNAL_LOCAL_AS: // XXX local as to use STORE_PTR(pkt, p->local_as); BGP_DATA(vb, AGENTX_INTEGER, pkt); break; case BGP_INTERNAL_BGP: vb->type = AGENTX_NO_SUCH_OBJECT; } snmp_log("snmp ended with non empty pkt %u starting from %p to %p\n", pkt - temp, temp, pkt); return pkt; } byte * snmp_bgp_fill(struct snmp_proto *p, struct agentx_varbind *vb, byte *buf UNUSED, uint size UNUSED, uint contid UNUSED, int byte_ord UNUSED) { u8 state = snmp_bgp_state(&vb->name); //snmp_log("snmp_bgp_fill() state %u is dynamic %s has value %s", state, is_dynamic(state) ? "true" : "false", snmp_bgp_has_value(state) ? "true" : "false"); if (!is_dynamic(state)) return bgp_fill_static(p, vb, buf, size, contid, byte_ord, state); if (is_dynamic(state) && snmp_bgp_has_value(state)) return bgp_fill_dynamic(p, vb, buf, size, contid, byte_ord, state); else { return buf; } /* { snmp_log("has no value"); struct agentx_varbind *vb = snmp_create_varbind(buf, oid); buf += snmp_varbind_size(vb); vb->type = AGENTX_NO_SUCH_OBJECT; return buf; } */ }