mirror of
https://gitlab.nic.cz/labs/bird.git
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780 lines
21 KiB
C
780 lines
21 KiB
C
/*
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* BIRD -- Simple Network Management Protocol (SNMP)
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* BGP4-MIB bgpPeerTable
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*
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* (c) 2022 Vojtech Vilimek <vojtech.vilimek@nic.cz>
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* (c) 2022 CZ.NIC z.s.p.o
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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/* BGP_MIB states see enum BGP_INTERNAL_STATES */
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#include "snmp.h"
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#include "snmp_utils.h"
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#include "subagent.h"
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#include "bgp_mib.h"
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static const char * const debug_bgp_states[] = {
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[BGP_INTERNAL_INVALID] = "BGP_INTERNAL_INVALID",
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[BGP_INTERNAL_BGP] = "BGP_INTERNAL_BGP",
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[BGP_INTERNAL_VERSION] = "BGP_INTERNAL_VERSION",
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[BGP_INTERNAL_LOCAL_AS] = "BGP_INTERNAL_LOCAL_AS",
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[BGP_INTERNAL_PEER_TABLE] = "BGP_INTERNAL_PEER_TABLE",
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[BGP_INTERNAL_PEER_ENTRY] = "BGP_INTERNAL_PEER_ENTRY",
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[BGP_INTERNAL_IDENTIFIER] = "BGP_INTERNAL_IDENTIFIER",
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[BGP_INTERNAL_STATE] = "BGP_INTERNAL_STATE",
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[BGP_INTERNAL_ADMIN_STATUS] = "BGP_INTERNAL_ADMIN_STATUS",
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[BGP_INTERNAL_NEGOTIATED_VERSION] = "BGP_INTERNAL_NEGOTIATED_VERSION",
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[BGP_INTERNAL_LOCAL_ADDR] = "BGP_INTERNAL_LOCAL_ADDR",
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[BGP_INTERNAL_LOCAL_PORT] = "BGP_INTERNAL_LOCAL_PORT",
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[BGP_INTERNAL_REMOTE_ADDR] = "BGP_INTERNAL_REMOTE_ADDR",
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[BGP_INTERNAL_REMOTE_PORT] = "BGP_INTERNAL_REMOTE_PORT",
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[BGP_INTERNAL_REMOTE_AS] = "BGP_INTERNAL_REMOTE_AS",
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[BGP_INTERNAL_RX_UPDATES] = "BGP_INTERNAL_RX_UPDATES",
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[BGP_INTERNAL_TX_UPDATES] = "BGP_INTERNAL_TX_UPDATES",
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[BGP_INTERNAL_RX_MESSAGES] = "BGP_INTERNAL_RX_MESSAGES",
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[BGP_INTERNAL_TX_MESSAGES] = "BGP_INTERNAL_TX_MESSAGES",
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[BGP_INTERNAL_LAST_ERROR] = "BGP_INTERNAL_LAST_ERROR",
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[BGP_INTERNAL_FSM_TRANSITIONS] = "BGP_INTERNAL_FSM_TRANSITIONS",
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[BGP_INTERNAL_FSM_ESTABLISHED_TIME] = "BGP_INTERNAL_FSM_ESTABLISHED_TIME",
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[BGP_INTERNAL_RETRY_INTERVAL] = "BGP_INTERNAL_RETRY_INTERVAL",
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[BGP_INTERNAL_HOLD_TIME] = "BGP_INTERNAL_HOLD_TIME",
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[BGP_INTERNAL_KEEPALIVE] = "BGP_INTERNAL_KEEPALIVE",
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[BGP_INTERNAL_HOLD_TIME_CONFIGURED] = "BGP_INTERNAL_HOLD_TIME_CONFIGURED",
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[BGP_INTERNAL_KEEPALIVE_CONFIGURED] = "BGP_INTERNAL_KEEPALIVE_CONFIGURED",
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[BGP_INTERNAL_ORIGINATION_INTERVAL] = "BGP_INTERNAL_ORIGINATION_INTERVAL",
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[BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT] = "BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT",
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[BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME] = "BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME",
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[BGP_INTERNAL_END] = "BGP_INTERNAL_END",
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[BGP_INTERNAL_NO_VALUE] = "BGP_INTERNAL_NO_VALUE",
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};
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void
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snmp_bgp_register()
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{}
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int
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snmp_bgp_valid_ip4(struct oid *o)
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{
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return snmp_valid_ip4_index(o, 5);
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}
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static u8
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bgp_get_candidate(u32 field)
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{
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const u8 translation_table[] = {
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[SNMP_BGP_IDENTIFIER] = BGP_INTERNAL_IDENTIFIER,
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[SNMP_BGP_STATE] = BGP_INTERNAL_STATE,
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[SNMP_BGP_ADMIN_STATUS] = BGP_INTERNAL_ADMIN_STATUS,
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[SNMP_BGP_NEGOTIATED_VERSION] = BGP_INTERNAL_NEGOTIATED_VERSION,
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[SNMP_BGP_LOCAL_ADDR] = BGP_INTERNAL_LOCAL_ADDR,
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[SNMP_BGP_LOCAL_PORT] = BGP_INTERNAL_LOCAL_PORT,
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[SNMP_BGP_REMOTE_ADDR] = BGP_INTERNAL_REMOTE_ADDR,
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[SNMP_BGP_REMOTE_PORT] = BGP_INTERNAL_REMOTE_PORT,
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[SNMP_BGP_REMOTE_AS] = BGP_INTERNAL_REMOTE_AS,
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[SNMP_BGP_RX_UPDATES] = BGP_INTERNAL_RX_UPDATES,
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[SNMP_BGP_TX_UPDATES] = BGP_INTERNAL_TX_UPDATES,
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[SNMP_BGP_RX_MESSAGES] = BGP_INTERNAL_RX_MESSAGES,
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[SNMP_BGP_TX_MESSAGES] = BGP_INTERNAL_TX_MESSAGES,
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[SNMP_BGP_LAST_ERROR] = BGP_INTERNAL_LAST_ERROR,
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[SNMP_BGP_FSM_TRANSITIONS] = BGP_INTERNAL_FSM_TRANSITIONS,
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[SNMP_BGP_FSM_ESTABLISHED_TIME] = BGP_INTERNAL_FSM_ESTABLISHED_TIME,
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[SNMP_BGP_RETRY_INTERVAL] = BGP_INTERNAL_RETRY_INTERVAL,
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[SNMP_BGP_HOLD_TIME] = BGP_INTERNAL_HOLD_TIME,
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[SNMP_BGP_KEEPALIVE] = BGP_INTERNAL_KEEPALIVE,
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[SNMP_BGP_HOLD_TIME_CONFIGURED] = BGP_INTERNAL_HOLD_TIME_CONFIGURED,
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[SNMP_BGP_KEEPALIVE_CONFIGURED] = BGP_INTERNAL_KEEPALIVE_CONFIGURED,
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[SNMP_BGP_ORIGINATION_INTERVAL] = BGP_INTERNAL_ORIGINATION_INTERVAL,
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[SNMP_BGP_MIN_ROUTE_ADVERTISEMENT] = BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT,
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[SNMP_BGP_IN_UPDATE_ELAPSED_TIME] = BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME,
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};
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/* first value is in secord cell of array translation_table (as the
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* SNMP_BPG_IDENTIFIER == 1
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*/
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if (field > 0 && field < sizeof(translation_table) / sizeof(translation_table[0]))
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return translation_table[field];
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else
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return BGP_INTERNAL_NO_VALUE;
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}
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static inline struct ip4_addr
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ip4_from_oid(const struct oid *o)
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{
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return (o->n_subid == 9) ? ip4_build(o->ids[5], o->ids[6], o->ids[7],
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o->ids[8]) : IP4_NONE;
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}
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/**
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* snmp_bgp_state - linearize oid from BGP4-MIB
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* @oid: prefixed object identifier from BGP4-MIB::bgp subtree
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*
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* Returns linearized state for Get-PDU, GetNext-PDU and GetBulk-PDU packets.
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*/
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u8
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snmp_bgp_state(struct oid *oid)
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{
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/* already checked:
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xxxxxxxx p
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* (*oid): .1.3.6.1.2.1.15
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* -> BGP4-MIB::bgp (root)
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*/
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u8 state = BGP_INTERNAL_NO_VALUE;
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u8 candidate;
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switch (oid->n_subid)
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{
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default:
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if (oid->n_subid < 2)
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{
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state = BGP_INTERNAL_INVALID;
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break;
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}
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/* else oid->n_subid >= 2 */
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/* fall through */
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/* between ids[5] and ids[8] (n_subid == 9) should be IP address
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* validity is checked later in execution because
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* this field also could mean a query boundry (upper or lower)
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*/
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case 9:
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case 8:
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case 7:
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case 6:
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case 5:
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state = bgp_get_candidate(oid->ids[4]);
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/* fall through */
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case 4:
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if (oid->ids[3] == BGP4_PEER_ENTRY)
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state = (state == BGP_INTERNAL_NO_VALUE) ?
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BGP_INTERNAL_PEER_ENTRY : state;
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else
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state = BGP_INTERNAL_NO_VALUE;
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/* fall through */
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case 3:
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/* u8 candidate; */
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switch (oid->ids[2])
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{
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case SNMP_BGP_VERSION:
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state = BGP_INTERNAL_VERSION;
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break;
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case SNMP_BGP_LOCAL_AS:
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state = BGP_INTERNAL_LOCAL_AS;
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break;
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case SNMP_BGP_PEER_TABLE:
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/* candidate avoid overriding more specific state */
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candidate = BGP_INTERNAL_PEER_TABLE;
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break;
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default: /* test fails */
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/* invalidate the state forcefully */
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if (oid->ids[2] < SNMP_BGP_VERSION)
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{
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state = BGP_INTERNAL_NO_VALUE;
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candidate = BGP_INTERNAL_NO_VALUE;
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}
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else /* oid->ids[2] > SNMP_BGP_PEER_TABLE */
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state = BGP_INTERNAL_END;
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}
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state = (state == BGP_INTERNAL_NO_VALUE) ?
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candidate : state;
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/* fall through */
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case 2: /* bare BGP4-MIB::bgp */
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if (state == BGP_INTERNAL_NO_VALUE ||
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state == BGP_INTERNAL_INVALID)
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state = BGP_INTERNAL_BGP;
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}
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return state;
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}
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static inline int
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is_dynamic(u8 state)
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{
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return (state >= BGP_INTERNAL_IDENTIFIER &&
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state <= BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME);
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}
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static inline int
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snmp_bgp_has_value(u8 state)
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{
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if (state <= BGP_INTERNAL_BGP ||
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state == BGP_INTERNAL_PEER_TABLE ||
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state == BGP_INTERNAL_PEER_ENTRY ||
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/* unsupported fields */
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state == BGP_INTERNAL_FSM_ESTABLISHED_TIME ||
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state == BGP_INTERNAL_ORIGINATION_INTERVAL ||
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state == BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT ||
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state == BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME)
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return 0; /* hasn't value */
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else
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return 1; /* has value */
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}
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/**
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* snmp_bgp_get_valid - only states with valid value
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* @state: BGP linearized state
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*
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* Returns @state if has value in BGP4-MIB, zero otherwise. Used for Get-PDU
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* packets.
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*/
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u8
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snmp_bgp_get_valid(u8 state)
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{
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/* invalid
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* SNMP_BGP SNMP_BGP_PEER_TABLE SNMP_BGP_PEER_ENTRY
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* SNMP_BGP_FSM_ESTABLISHED_TIME SNMP_BGP_IN_UPDATE_ELAPSED_TIME
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*/
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if (state == 1 || state == 4 || state == 5 ||
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state == 21 || state == 29)
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return 0;
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else
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return state;
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}
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/**
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* snmp_bgp_next_state - next state that has value
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* @state: BGP linearized state
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*
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* Returns successor state of @state with valid value in BG4-MIB. Used for
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* GetNext-PDU and GetBulk-PDU packets.
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*/
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u8
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snmp_bgp_next_state(u8 state)
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{
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switch (state)
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{
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case BGP_INTERNAL_LOCAL_AS:
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case BGP_INTERNAL_PEER_TABLE:
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case BGP_INTERNAL_PEER_ENTRY:
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return BGP_INTERNAL_IDENTIFIER;
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case BGP_INTERNAL_FSM_TRANSITIONS:
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case BGP_INTERNAL_FSM_ESTABLISHED_TIME:
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return BGP_INTERNAL_RETRY_INTERVAL;
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case BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME:
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case BGP_INTERNAL_END:
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return BGP_INTERNAL_END;
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default:
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return state + 1;
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}
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}
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int
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snmp_bgp_is_supported(struct oid *o)
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{
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/* most likely not functioning */
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if (o->prefix == 2 && o->n_subid > 0 && o->ids[0] == 1)
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{
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if (o->n_subid == 2 && o->ids[1] == BGP4_MIB_VERSION ||
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o->ids[1] == BGP4_MIB_LOCAL_AS)
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return 1;
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else if (o->n_subid > 2 && o->ids[1] == BGP4_PEER_TABLE &&
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o->ids[2] == BGP4_PEER_ENTRY)
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{
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if (o->n_subid == 3)
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return 1;
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if (o->n_subid == 8 &&
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o->ids[3] > 0 &&
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/* do not include bgpPeerInUpdatesElapsedTime
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and bgpPeerFsmEstablishedTime */
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o->ids[3] < SNMP_BGP_IN_UPDATE_ELAPSED_TIME &&
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o->ids[3] != SNMP_BGP_FSM_ESTABLISHED_TIME)
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return 1;
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}
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else
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return 0;
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}
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return 0;
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}
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static struct oid *
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update_bgp_oid(struct oid *oid, u8 state)
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{
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ASSERT (state != BGP_INTERNAL_INVALID);
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ASSERT (state != BGP_INTERNAL_NO_VALUE);
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ASSERT (state != BGP_INTERNAL_END);
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/* if same state, no need to realloc anything */
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if (snmp_bgp_state(oid) == state)
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return oid;
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switch (state)
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{
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case BGP_INTERNAL_BGP:
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/* could destroy same old data */
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oid = mb_realloc(oid, sizeof(struct oid) + 2 * sizeof(u32));
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oid->n_subid = 2;
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oid->ids[0] = 1;
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oid->ids[1] = SNMP_BGP4_MIB;
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break;
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case BGP_INTERNAL_VERSION:
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oid = mb_realloc(oid, sizeof(struct oid) + 3 * sizeof(u32));
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oid->n_subid = 3;
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oid->ids[2] = SNMP_BGP_VERSION;
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break;
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case BGP_INTERNAL_LOCAL_AS:
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oid->ids[2] = 2;
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break;
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case BGP_INTERNAL_IDENTIFIER:
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oid = mb_realloc(oid, sizeof(struct oid) + 9 * sizeof(u32));
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oid->n_subid = 9;
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oid->ids[2] = SNMP_BGP_PEER_TABLE;
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oid->ids[3] = SNMP_BGP_PEER_ENTRY;
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oid->ids[4] = SNMP_BGP_IDENTIFIER;
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/* zero the ip */
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oid->ids[5] = oid->ids[6] = oid->ids[7] = oid->ids[8] = 0;
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break;
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#define SNMP_UPDATE_CASE(num, update) \
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case num: \
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oid->ids[4] = update; \
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break;
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SNMP_UPDATE_CASE(BGP_INTERNAL_STATE, SNMP_BGP_STATE)
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SNMP_UPDATE_CASE(BGP_INTERNAL_ADMIN_STATUS, SNMP_BGP_ADMIN_STATUS)
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SNMP_UPDATE_CASE(BGP_INTERNAL_NEGOTIATED_VERSION, SNMP_BGP_NEGOTIATED_VERSION)
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SNMP_UPDATE_CASE(BGP_INTERNAL_LOCAL_ADDR, SNMP_BGP_LOCAL_ADDR)
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SNMP_UPDATE_CASE(BGP_INTERNAL_LOCAL_PORT, SNMP_BGP_LOCAL_PORT)
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SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_ADDR, SNMP_BGP_REMOTE_ADDR)
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SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_PORT, SNMP_BGP_REMOTE_PORT)
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SNMP_UPDATE_CASE(BGP_INTERNAL_REMOTE_AS, SNMP_BGP_REMOTE_AS)
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SNMP_UPDATE_CASE(BGP_INTERNAL_RX_UPDATES, SNMP_BGP_RX_UPDATES)
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SNMP_UPDATE_CASE(BGP_INTERNAL_TX_UPDATES, SNMP_BGP_TX_UPDATES)
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SNMP_UPDATE_CASE(BGP_INTERNAL_RX_MESSAGES, SNMP_BGP_RX_MESSAGES)
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SNMP_UPDATE_CASE(BGP_INTERNAL_TX_MESSAGES, SNMP_BGP_TX_MESSAGES)
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SNMP_UPDATE_CASE(BGP_INTERNAL_LAST_ERROR, SNMP_BGP_LAST_ERROR)
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SNMP_UPDATE_CASE(BGP_INTERNAL_FSM_TRANSITIONS, SNMP_BGP_FSM_TRANSITIONS)
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SNMP_UPDATE_CASE(BGP_INTERNAL_FSM_ESTABLISHED_TIME, SNMP_BGP_FSM_ESTABLISHED_TIME)
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SNMP_UPDATE_CASE(BGP_INTERNAL_RETRY_INTERVAL, SNMP_BGP_RETRY_INTERVAL)
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SNMP_UPDATE_CASE(BGP_INTERNAL_HOLD_TIME, SNMP_BGP_HOLD_TIME)
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SNMP_UPDATE_CASE(BGP_INTERNAL_KEEPALIVE, SNMP_BGP_KEEPALIVE)
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SNMP_UPDATE_CASE(BGP_INTERNAL_HOLD_TIME_CONFIGURED, SNMP_BGP_HOLD_TIME_CONFIGURED)
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SNMP_UPDATE_CASE(BGP_INTERNAL_KEEPALIVE_CONFIGURED, SNMP_BGP_KEEPALIVE_CONFIGURED)
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SNMP_UPDATE_CASE(BGP_INTERNAL_ORIGINATION_INTERVAL, SNMP_BGP_ORIGINATION_INTERVAL)
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SNMP_UPDATE_CASE(BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT, SNMP_BGP_MIN_ROUTE_ADVERTISEMENT)
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SNMP_UPDATE_CASE(BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME, SNMP_BGP_IN_UPDATE_ELAPSED_TIME)
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}
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return oid;
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#undef SNMP_UPDATE_CASE
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}
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// TODO test bgp_find_dynamic_oid
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static struct oid *
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bgp_find_dynamic_oid(struct snmp_proto *p, struct oid *o_start, struct oid *o_end, u8 state UNUSED)
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{
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log(L_INFO "bgp_find_dynamic_oid()");
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ip4_addr ip4 = ip4_from_oid(o_start);
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ip4_addr dest = ip4_from_oid(o_end);
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log(L_INFO "ip addresses build");
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net_addr *net = mb_allocz(p->p.pool, sizeof(struct net_addr));
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net_fill_ip4(net, ip4, IP4_MAX_PREFIX_LENGTH);
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log(L_INFO "dynamic part of BGP mib");
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struct f_trie_walk_state *ws = mb_allocz(p->p.pool,
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sizeof(struct f_trie_walk_state));
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trie_walk_init(ws, p->bgp_trie, NULL);
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if (trie_walk_next(ws, net) && ip4_less(net4_prefix(net), dest))
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{
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struct oid *o = mb_allocz(p->p.pool, sizeof(struct oid) + 9 * sizeof(u32));
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o->n_subid = 9;
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memcpy(o, o_start, snmp_oid_size(o_start));
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snmp_oid_ip4_index(o, 5, net4_prefix(net));
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mb_free(net);
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mb_free(ws);
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return o;
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}
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|
|
else
|
|
{
|
|
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 next_state)
|
|
{
|
|
/* TODO can be remove after implementing all BGP4-MIB::bgpPeerTable columns */
|
|
struct oid *copy = o_start;
|
|
do {
|
|
o_start = copy = update_bgp_oid(copy, next_state);
|
|
|
|
o_start = bgp_find_dynamic_oid(p, o_start, o_end, next_state);
|
|
|
|
next_state = snmp_bgp_next_state(next_state);
|
|
|
|
} 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;
|
|
|
|
if (o_start->include && snmp_bgp_has_value(start_state) &&
|
|
!is_dynamic(start_state) && o_start->n_subid == 3)
|
|
{
|
|
o_start->include = 0; /* disable including for next time */
|
|
return o_start;
|
|
}
|
|
|
|
/* if state is_dynamic() then has more value and need find the right one */
|
|
else if (!is_dynamic(start_state))
|
|
{
|
|
u8 next_state = snmp_bgp_next_state(start_state);
|
|
o_start = update_bgp_oid(o_start, next_state);
|
|
|
|
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)
|
|
{
|
|
//log(L_INFO "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;
|
|
}
|
|
|
|
log(L_INFO " -> 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;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
switch (state)
|
|
{
|
|
|
|
case BGP_INTERNAL_IDENTIFIER:
|
|
if (bgp_state == BS_OPENCONFIRM || bgp_state == BS_ESTABLISHED)
|
|
{
|
|
STORE_PTR(pkt, ipa_to_u32(bgp_proto->remote_ip));
|
|
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
|
|
STORE_PTR(pkt, ipa_to_u32(bgp_proto->local_ip));
|
|
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:
|
|
STORE_PTR(pkt, ipa_to_u32(bgp_proto->remote_ip));
|
|
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;
|
|
|
|
case BGP_INTERNAL_FSM_TRANSITIONS:
|
|
break;
|
|
case BGP_INTERNAL_FSM_ESTABLISHED_TIME:
|
|
break;
|
|
case BGP_INTERNAL_RETRY_INTERVAL:
|
|
break;
|
|
case BGP_INTERNAL_HOLD_TIME:
|
|
break;
|
|
case BGP_INTERNAL_KEEPALIVE:
|
|
break;
|
|
case BGP_INTERNAL_HOLD_TIME_CONFIGURED:
|
|
break;
|
|
case BGP_INTERNAL_KEEPALIVE_CONFIGURED:
|
|
break;
|
|
case BGP_INTERNAL_ORIGINATION_INTERVAL:
|
|
break;
|
|
case BGP_INTERNAL_MIN_ROUTE_ADVERTISEMENT:
|
|
break;
|
|
case BGP_INTERNAL_IN_UPDATE_ELAPSED_TIME:
|
|
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)
|
|
{
|
|
log(L_INFO "snmp bgp_fill_static ()\n");
|
|
|
|
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;
|
|
}
|
|
|
|
log(L_INFO "snmp ended with non empty pkt\n");
|
|
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);
|
|
//log(L_INFO "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;
|
|
}
|
|
/*
|
|
{
|
|
log(L_INFO "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;
|
|
}
|
|
*/
|
|
}
|