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af9a2d4cd7
bird/proto/snmp/bgp4_mib.c
Vojtech Vilimek af9a2d4cd7 SNMP: Slow integraion of MIB tree in SNMP code
2024-05-24 15:20:30 +02:00

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/*
* BIRD -- Simple Network Management Protocol (SNMP)
* BGP4-MIB bgpPeerTable
*
* (c) 2022 Vojtech Vilimek <vojtech.vilimek@nic.cz>
* (c) 2022 CZ.NIC z.s.p.o
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
/* need to be first header file included */
#include "bgp4_mib.h"
#include "snmp.h"
#include "snmp_utils.h"
#include "subagent.h"
/* hash table macros */
#define SNMP_HASH_KEY(n) n->peer_ip
#define SNMP_HASH_NEXT(n) n->next
#define SNMP_HASH_EQ(ip1, ip2) ip4_equal(ip1, ip2)
#define SNMP_HASH_FN(ip) ip4_hash(ip)
#define SNMP_HASH_LESS4(ip1, ip2) ip4_less(ip1, ip2)
#define SNMP_HASH_LESS6(ip1, ip2) ip6_less(ip1, ip2)
/* hash table only store ip4 addresses */
#define SNMP_HASH_LESS(ip1, ip2) SNMP_HASH_LESS4(ip1,ip2)
// TODO delete me
#define SNMP_MANAGE_TBUF(...) (void)0
#define DECLARE_BGP4(addr, proto, conn, stats, config) \
ip4_addr addr; \
const struct bgp_proto *proto; \
const struct bgp_conn *conn; \
const struct bgp_stats *stats; \
const struct bgp_config *config
#define POPULATE_BGP4(addr, proto, conn, stats, config) populate_bgp4(p, c, &(addr), &(proto), &(conn), &(stats), &(config))
static inline void ip4_to_oid(struct oid *oid, ip4_addr addr);
static inline void
snmp_hash_add_peer(struct snmp_proto *p, struct snmp_bgp_peer *peer)
{
HASH_INSERT(p->bgp_hash, SNMP_HASH, peer);
}
static inline struct snmp_bgp_peer *
snmp_hash_find(struct snmp_proto *p, ip4_addr key)
{
return HASH_FIND(p->bgp_hash, SNMP_HASH, key);
}
static inline void
snmp_bgp_last_error(const struct bgp_proto *bgp, char err[2])
{
err[0] = bgp->last_error_code & 0x00FF0000 >> 16;
err[1] = bgp->last_error_code & 0x000000FF;
}
static u8
bgp_get_candidate(u32 field)
{
const u8 translation_table[] = {
[BGP4_MIB_PEER_IDENTIFIER] = BGP4_MIB_S_PEER_IDENTIFIER,
[BGP4_MIB_STATE] = BGP4_MIB_S_STATE,
[BGP4_MIB_ADMIN_STATUS] = BGP4_MIB_S_ADMIN_STATUS,
[BGP4_MIB_NEGOTIATED_VERSION] = BGP4_MIB_S_NEGOTIATED_VERSION,
[BGP4_MIB_LOCAL_ADDR] = BGP4_MIB_S_LOCAL_ADDR,
[BGP4_MIB_LOCAL_PORT] = BGP4_MIB_S_LOCAL_PORT,
[BGP4_MIB_REMOTE_ADDR] = BGP4_MIB_S_REMOTE_ADDR,
[BGP4_MIB_REMOTE_PORT] = BGP4_MIB_S_REMOTE_PORT,
[BGP4_MIB_REMOTE_AS] = BGP4_MIB_S_REMOTE_AS,
[BGP4_MIB_RX_UPDATES] = BGP4_MIB_S_RX_UPDATES,
[BGP4_MIB_TX_UPDATES] = BGP4_MIB_S_TX_UPDATES,
[BGP4_MIB_RX_MESSAGES] = BGP4_MIB_S_RX_MESSAGES,
[BGP4_MIB_TX_MESSAGES] = BGP4_MIB_S_TX_MESSAGES,
[BGP4_MIB_LAST_ERROR] = BGP4_MIB_S_LAST_ERROR,
[BGP4_MIB_FSM_TRANSITIONS] = BGP4_MIB_S_FSM_TRANSITIONS,
[BGP4_MIB_FSM_ESTABLISHED_TIME] = BGP4_MIB_S_FSM_ESTABLISHED_TIME,
[BGP4_MIB_RETRY_INTERVAL] = BGP4_MIB_S_RETRY_INTERVAL,
[BGP4_MIB_HOLD_TIME] = BGP4_MIB_S_HOLD_TIME,
[BGP4_MIB_KEEPALIVE] = BGP4_MIB_S_KEEPALIVE,
[BGP4_MIB_HOLD_TIME_CONFIGURED] = BGP4_MIB_S_HOLD_TIME_CONFIGURED,
[BGP4_MIB_KEEPALIVE_CONFIGURED] = BGP4_MIB_S_KEEPALIVE_CONFIGURED,
[BGP4_MIB_ORIGINATION_INTERVAL] = BGP4_MIB_S_ORIGINATION_INTERVAL,
[BGP4_MIB_MIN_ROUTE_ADVERTISEMENT] = BGP4_MIB_S_MIN_ROUTE_ADVERTISEMENT,
[BGP4_MIB_IN_UPDATE_ELAPSED_TIME] = BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME,
};
/*
* First value is in secord cell of array translation_table, as the
* SNMP_BGP_IDENTIFIER == 1
*/
if (field > 0 && field <= ARRAY_SIZE(translation_table)- 1)
return translation_table[field];
else if (field == 0)
return BGP4_MIB_S_PEER_ENTRY;
else
return BGP4_MIB_S_PEER_TABLE_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.
*/
static u8
snmp_bgp_state(const struct oid *oid)
{
/*
* Ids of Object Identifier that are already checked:
* internet oid.prefix
* v...... v
* (*oid): .1.3.6.1.2.1.15
* -> BGP4-MIB::bgp (root)
*/
if (snmp_is_oid_empty(oid))
return BGP4_MIB_S_END;
u8 state = BGP4_MIB_S_NO_VALUE;
u8 candidate;
switch (oid->n_subid)
{
default:
if (oid->n_subid < 2)
{
state = BGP4_MIB_S_INVALID;
break;
}
/* 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_MIB_PEER_ENTRY)
state = (state == BGP4_MIB_S_NO_VALUE) ?
BGP4_MIB_S_PEER_ENTRY : state;
else
state = BGP4_MIB_S_NO_VALUE;
/* fall through */
case 3:
/* u8 candidate; */
switch (oid->ids[2])
{
case BGP4_MIB_VERSION:
state = BGP4_MIB_S_VERSION;
break;
case BGP4_MIB_LOCAL_AS:
state = BGP4_MIB_S_LOCAL_AS;
break;
case BGP4_MIB_PEER_TABLE:
/* We use candidate to avoid overriding more specific state */
candidate = BGP4_MIB_S_PEER_TABLE;
break;
case BGP4_MIB_IDENTIFIER:
state = BGP4_MIB_S_IDENTIFIER;
break;
default: /* test fails */
/* We force state invalidation */
if (oid->ids[2] < BGP4_MIB_VERSION)
{
state = BGP4_MIB_S_NO_VALUE;
candidate = BGP4_MIB_S_NO_VALUE;
}
else /* oid->ids[2] > BGP4_MIB_PEER_TABLE */
state = BGP4_MIB_S_END;
}
state = (state == BGP4_MIB_S_NO_VALUE) ?
candidate : state;
/* fall through */
case 2: /* We found bare BGP4-MIB::bgp ObjectId */
if (state == BGP4_MIB_S_NO_VALUE ||
state == BGP4_MIB_S_INVALID)
state = BGP4_MIB_S_BGP;
}
return state;
}
static void
snmp_bgp_reg_ok(struct snmp_proto *p, const struct agentx_response *res, struct snmp_registration *reg)
{
const struct oid * const oid = reg->oid;
(void)oid;
(void)p;
(void) res;
}
static void
snmp_bgp_reg_failed(struct snmp_proto *p, const struct agentx_response *res, struct snmp_registration *reg)
{
const struct oid * const oid = reg->oid;
(void) res;
(void)oid;
(void)p;
}
/*
* snmp_bgp_notify_common - common functionaly for BGP4-MIB notifications
* @p: SNMP protocol instance
* @type: type of notification send - either established or backward transition
* @ip4: IPv4 remote addr
* @last_error: 2 bytes of BGP last error
* @state_val: BGP peer state as defined in MIB
*/
static void
snmp_bgp_notify_common(struct snmp_proto *p, uint type, ip4_addr ip4, char last_error[], uint state_val)
{
uint sz = (uint) (snmp_varbind_size_from_len(9, AGENTX_IP_ADDRESS, 0)
+ snmp_varbind_size_from_len(9, AGENTX_OCTET_STRING, 2)
+ snmp_varbind_size_from_len(9, AGENTX_INTEGER, 0));
u32 trap_ids[] = { 1, 0, type };
STATIC_ASSERT(ARRAY_SIZE(trap_ids) == 3);
/* additional size for trap identification, here either
* bgpEstablishedNotification or bgpBackwardTransNotification (see below) */
void *data = tmp_alloc(snmp_oid_size_from_len(ARRAY_SIZE(trap_ids)) + sz);
struct oid *head = data;
{ /* trap id BGP4-MIB::bgpEstablishedNotification (.1.3.6.1.2.15.0.1)
* or BGP4-MIB::bgpBackwardTransNotification (.1.3.6.1.2.15.0.2) */
head->n_subid = ARRAY_SIZE(trap_ids);
head->prefix = SNMP_MGMT;
head->include = head->reserved = 0;
for (uint i = 0; i < head->n_subid; i++)
head->ids[i] = trap_ids[i];
}
data += sz;
struct agentx_varbind *addr_vb = data;
struct agentx_varbind *error_vb = \
data + snmp_varbind_size_from_len(9, AGENTX_IP_ADDRESS, 0);
struct agentx_varbind *state_vb = \
(void *) error_vb + snmp_varbind_size_from_len(9, AGENTX_OCTET_STRING, 2);
u32 oid_ids[] = {
SNMP_MIB_2, BGP4_MIB, BGP4_MIB_PEER_TABLE, BGP4_MIB_PEER_ENTRY
};
/*
* The n_subid is 9 in all cases because all are rows entries of
* BGP4-MIB::bgpPeerTable
* BGP4-MIB::bgpPeerRemoteAddr = .1.3.6.1.[2].1.15.3.1.7.a.b.c.d
* where .1.3.6.1 is internet prefix, .[2] is SNMP_MGMT,
* .1.15.3.1.7.a.b.c.d has 9 elements (a.b.c.d are IP addr bytes)
* Here subidentifier 7 is entry type bgpPeerRemoteAddr.
*/
#define PEER_TABLE_ENTRY 9
#define ENTRY_TYPE 4
{ /* BGP4-MIB::bgpPeerRemoteAddr */
struct oid *addr = &addr_vb->name;
*addr = (struct oid) {
.n_subid = PEER_TABLE_ENTRY, .prefix = SNMP_MGMT, .include = 0,
.reserved = 0,
};
for (uint i = 0; i < ARRAY_SIZE(oid_ids); i++)
addr->ids[i] = oid_ids[i];
addr->ids[ENTRY_TYPE] = BGP4_MIB_REMOTE_ADDR;
ip4_to_oid(addr, ip4);
}
/* We have enough space inside the TX-buffer prepared */
struct snmp_pdu dummy = { 0 };
dummy.sr_vb_start = addr_vb;
snmp_varbind_ip4(&dummy, ip4);
{ /* BGP4-MIB::bgpPeerLastError */
struct oid *error = &error_vb->name;
*error = (struct oid) {
.n_subid = PEER_TABLE_ENTRY, .prefix = SNMP_MGMT, .include = 0,
.reserved = 0,
};
for (uint i = 0; i < ARRAY_SIZE(oid_ids); i++)
error->ids[i] = oid_ids[i];
error->ids[ENTRY_TYPE] = BGP4_MIB_LAST_ERROR;
ip4_to_oid(error, ip4);
}
dummy.sr_vb_start = error_vb;
snmp_varbind_nstr(&dummy, last_error, 2);
{ /* BGP4-MIB::bgpPeerState */
struct oid *state = &state_vb->name;
*state = (struct oid) {
.n_subid = PEER_TABLE_ENTRY, .prefix = SNMP_MGMT, .include = 0,
.reserved = 0,
};
for (uint i = 0; i < ARRAY_SIZE(oid_ids); i++)
state->ids[i] = oid_ids[i];
state->ids[ENTRY_TYPE] = BGP4_MIB_STATE;
ip4_to_oid(state, ip4);
}
dummy.sr_vb_start = state_vb;
snmp_varbind_int(&dummy, state_val);
/* We do not send the systemUpTime.0 */
snmp_notify_pdu(p, head, data, sz, 0);
#undef OID_N_SUBID
}
/*
* snmp_bgp_fsm_state - extract BGP FSM state for SNMP BGP4-MIB
* @bgp_proto: BGP instance
*
* Return FSM state in BGP4-MIB encoding
*/
static inline uint
snmp_bgp_fsm_state(const struct bgp_proto *bgp_proto)
{
const struct bgp_conn *bgp_conn = bgp_proto->conn;
const struct bgp_conn *bgp_in = &bgp_proto->incoming_conn;
const struct bgp_conn *bgp_out = &bgp_proto->outgoing_conn;
if (bgp_conn)
return bgp_conn->state + 1;
if (MAX(bgp_in->state, bgp_out->state) == BS_CLOSE &&
MIN(bgp_in->state, bgp_out->state) != BS_CLOSE)
return MIN(bgp_in->state, bgp_out->state) + 1;
if (MIN(bgp_in->state, bgp_out->state) == BS_CLOSE)
return BS_IDLE;
return MAX(bgp_in->state, bgp_out->state) + 1;
}
static void
snmp_bgp_notify_wrapper(struct snmp_proto *p, struct bgp_proto *bgp, uint type)
{
/* possibly incorrect cast */
ip4_addr ip4 = ipa_to_ip4(bgp->remote_ip);
char last_error[2];
snmp_bgp_last_error(bgp, last_error);
uint state_val = snmp_bgp_fsm_state(bgp);
snmp_bgp_notify_common(p, type, ip4, last_error, state_val);
}
void
snmp_bgp_notify_established(struct snmp_proto *p, struct bgp_proto *bgp)
{
snmp_bgp_notify_wrapper(p, bgp, BGP4_MIB_ESTABLISHED_NOTIFICATION);
}
void
snmp_bgp_notify_backward_trans(struct snmp_proto *p, struct bgp_proto *bgp)
{
snmp_bgp_notify_wrapper(p, bgp, BGP4_MIB_BACKWARD_TRANS_NOTIFICATION);
}
void
snmp_bgp4_register(struct snmp_proto *p)
{
u32 bgp_mib_prefix[] = { 1, 15 };
// TODO
{
/* Register the whole BGP4-MIB::bgp root tree node */
struct snmp_registration *reg;
reg = snmp_registration_create(p, BGP4_MIB);
struct oid *oid = mb_allocz(p->pool,
snmp_oid_size_from_len(ARRAY_SIZE(bgp_mib_prefix)));
STORE_U8(oid->n_subid, ARRAY_SIZE(bgp_mib_prefix));
STORE_U8(oid->prefix, SNMP_MGMT);
memcpy(oid->ids, bgp_mib_prefix, sizeof(bgp_mib_prefix));
reg->oid = oid;
reg->reg_hook_ok = snmp_bgp_reg_ok;
reg->reg_hook_fail = snmp_bgp_reg_failed;
/*
* We set both upper bound and index to zero, therefore only single OID
* is being registered.
*/
snmp_register(p, oid, 0, 0, SNMP_REGISTER_TREE, SNMP_DEFAULT_CONTEXT);
}
}
static int
snmp_bgp_valid_ip4(const struct oid *o)
{
return snmp_valid_ip4_index(o, 5);
}
static inline ip4_addr
ip4_from_oid(const struct oid *o)
{
return ip4_build(
o->n_subid > 5 ? (o->ids[5] & 0xff) : 0,
o->n_subid > 6 ? (o->ids[6] & 0xff) : 0,
o->n_subid > 7 ? (o->ids[7] & 0xff) : 0,
o->n_subid > 8 ? (o->ids[8] & 0xff) : 0
);
}
static inline void
ip4_to_oid(struct oid *o, ip4_addr addr)
{
u32 tmp = ip4_to_u32(addr);
ASSUME(o->n_subid >= 9);
STORE_U32(o->ids[5], (tmp & 0xFF000000) >> 24);
STORE_U32(o->ids[6], (tmp & 0x00FF0000) >> 16);
STORE_U32(o->ids[7], (tmp & 0x0000FF00) >> 8);
STORE_U32(o->ids[8], (tmp & 0x000000FF) >> 0);
}
static void
print_bgp_record(const struct bgp_proto *bgp_proto)
{
//struct proto_config *cf = bgp_proto->p.cf;
struct bgp_conn *conn = bgp_proto->conn;
DBG(" name: %s", cf->name);
DBG(".");
DBG(" rem. identifier: %u", bgp_proto->remote_id);
DBG(" local ip: %I", config->local_ip);
DBG(" remote ip: %I", config->remote_ip);
DBG(" local port: %u", config->local_port);
DBG(" remote port: %u", config->remote_port);
if (conn) {
DBG(" state: %u", conn->state);
DBG(" remote as: %u", conn->remote_caps->as4_number);
}
DBG(" in updates: %u", bgp_proto->stats.rx_updates);
DBG(" out updates: %u", bgp_proto->stats.tx_updates);
DBG(" in total: %u", bgp_proto->stats.rx_messages);
DBG(" out total: %u", bgp_proto->stats.tx_messages);
DBG(" fsm transitions: %u",
bgp_proto->stats.fsm_established_transitions);
DBG(" fsm total time: -- (0)"); // not supported by bird
DBG(" retry interval: %u", config->connect_retry_time);
DBG(" hold configurated: %u", config->hold_time );
DBG(" keep alive config: %u", config->keepalive_time );
DBG(" min AS origin. int.: -- (0)"); // not supported by bird
DBG(" min route advertisement: %u", 0 );
DBG(" in update elapsed time: %u", 0 );
if (!conn)
DBG(" no connection established");
DBG(" outgoinin_conn state %u", bgp_proto->outgoing_conn.state + 1);
DBG(" incoming_conn state: %u", bgp_proto->incoming_conn.state + 1);
}
static void UNUSED
print_bgp_record_all(struct snmp_proto *p)
{
DBG("dumping watched bgp status");
HASH_WALK(p->bgp_hash, next, peer)
{
print_bgp_record(peer->bgp_proto);
}
HASH_WALK_END;
DBG("dumping watched end");
}
/*
* is_dynamic - is state dependent on runtime BGP peer state
* @state: tested bgp4_mib state
*
* Used to distinguish states that depend on runtime BGP peer states.
*
* Return nonzero for states with value that may change at runtime.
*/
static inline int
is_dynamic(u8 state)
{
return (state >= BGP4_MIB_S_PEER_IDENTIFIER &&
state <= BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME);
}
/*
* is_static - logical inverse of is_dynamic() for states with value
* @state: tested bgp4_mib state
*
* Return nonzero for states with value that do not change at runtime.
*/
static inline int
is_static(u8 state)
{
return (state == BGP4_MIB_S_VERSION ||
state == BGP4_MIB_S_LOCAL_AS ||
state == BGP4_MIB_S_IDENTIFIER);
}
static inline int
snmp_bgp_has_value(u8 state)
{
if (state <= BGP4_MIB_S_BGP ||
state == BGP4_MIB_S_PEER_TABLE ||
state == BGP4_MIB_S_PEER_ENTRY ||
state == BGP4_MIB_S_PEER_TABLE_END ||
state >= BGP4_MIB_S_END)
return 0;
else
return 1;
}
/**
* 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
* packets.
*/
u8
snmp_bgp_get_valid(u8 state)
{
if (state == BGP4_MIB_S_INVALID ||
state == BGP4_MIB_S_BGP ||
state == BGP4_MIB_S_PEER_TABLE ||
state == BGP4_MIB_S_PEER_ENTRY ||
state == BGP4_MIB_S_PEER_TABLE_END ||
state >= BGP4_MIB_S_END)
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 BGP4_MIB_S_LOCAL_AS:
case BGP4_MIB_S_PEER_TABLE:
case BGP4_MIB_S_PEER_ENTRY:
return BGP4_MIB_S_PEER_IDENTIFIER;
case BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME:
case BGP4_MIB_S_PEER_TABLE_END:
return BGP4_MIB_S_IDENTIFIER;
case BGP4_MIB_S_IDENTIFIER:
case BGP4_MIB_S_END:
return BGP4_MIB_S_END;
default:
return state + 1;
}
}
static int
oid_state_compare(const struct oid *oid, u8 state)
{
ASSUME(oid != NULL);
if (state >= BGP4_MIB_S_PEER_IDENTIFIER &&
state <= BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME)
return (oid->n_subid > 9) - (oid->n_subid < 9);
if ((state >= BGP4_MIB_S_VERSION && state <= BGP4_MIB_S_PEER_TABLE) ||
(state == BGP4_MIB_S_IDENTIFIER))
return (oid->n_subid > 3) - (oid->n_subid < 3);
if (state == BGP4_MIB_S_PEER_ENTRY)
return (oid->n_subid > 4) - (oid->n_subid < 4);
if (state == BGP4_MIB_S_BGP)
return (oid->n_subid > 2) - (oid->n_subid < 2);
return -1;
}
static inline enum snmp_search_res
populate_bgp4(struct snmp_proto *p, struct snmp_pdu *c, ip4_addr *addr, const struct bgp_proto **proto, const struct bgp_conn
**conn, const struct bgp_stats **stats, const struct bgp_config **config)
{
const struct oid * const oid = &c->sr_vb_start->name;
if (snmp_bgp_valid_ip4(oid))
*addr = ip4_from_oid(oid);
else
return SNMP_SEARCH_NO_INSTANCE;
struct snmp_bgp_peer *pe = snmp_hash_find(p, *addr);
if (!pe)
return SNMP_SEARCH_NO_INSTANCE;
const struct bgp_proto *bgp_proto;
*proto = bgp_proto = pe->bgp_proto;
if (ipa_is_ip4(bgp_proto->remote_ip))
{
log(L_ERR, "%s: Found BGP protocol instance with IPv6 address", bgp_proto->p.name);
c->error = AGENTX_RES_GEN_ERROR;
return SNMP_SEARCH_NO_INSTANCE;
}
ip4_addr proto_ip = ipa_to_ip4(bgp_proto->remote_ip);
if (!ip4_equal(proto_ip, pe->peer_ip))
{
/* Here, we could be in problem as the bgp_proto IP address could be changed */
log(L_ERR, "%s: Stored hash key IP address and peer remote address differ.",
bgp_proto->p.name);
c->error = AGENTX_RES_GEN_ERROR;
return SNMP_SEARCH_NO_INSTANCE;
}
*conn = bgp_proto->conn;
*stats = &bgp_proto->stats;
*config = bgp_proto->cf;
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_bgp_version(struct snmp_proto *p, struct snmp_pdu *c)
{
if (c->sr_vb_start->name.n_subid != 4)
{
snmp_set_varbind_type(c->sr_vb_start, AGENTX_NO_SUCH_INSTANCE);
return SNMP_SEARCH_NO_INSTANCE;
}
uint sz = snmp_str_size_from_len(1);
if (c->size < sz)
snmp_manage_tbuf(p, c);
c->size -= sz;
snmp_varbind_nstr(c, BGP4_VERSIONS, 1);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_local_as(struct snmp_proto *p, struct snmp_pdu *c)
{
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, p->bgp_local_as);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_peer_id(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
uint fsm_state = snmp_bgp_fsm_state(bgp_proto);
if (c->size < AGENTX_TYPE_IP4_SIZE)
snmp_manage_tbuf(p, c);
if (fsm_state == BGP4_MIB_OPENCONFIRM || fsm_state == BGP4_MIB_ESTABLISHED)
// TODO last
snmp_varbind_ip4(c, ip4_from_u32(bgp_proto->remote_id));
else
snmp_varbind_ip4(c, IP4_NONE);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_peer_state(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
uint fsm_state = snmp_bgp_fsm_state(bgp_proto);
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, fsm_state);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_admin_status(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
if (bgp_proto->p.disabled)
snmp_varbind_int(c, AGENTX_ADMIN_STOP);
else
snmp_varbind_int(c, AGENTX_ADMIN_START);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_neg_version(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
uint fsm_state = snmp_bgp_fsm_state(bgp_proto);
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
if (fsm_state == BGP4_MIB_ESTABLISHED || fsm_state == BGP4_MIB_ESTABLISHED)
snmp_varbind_int(c, BGP4_MIB_NEGOTIATED_VER_VALUE);
else
snmp_varbind_int(c, BGP4_MIB_NEGOTIATED_VER_NO_VALUE);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_local_addr(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_IP4_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_ip4(c, ipa_to_ip4(bgp_proto->local_ip));
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_local_port(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, bgp_conf->local_port);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_remove_addr(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_IP4_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_ip4(c, ipa_to_ip4(bgp_proto->remote_ip));
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_remote_port(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, bgp_conf->remote_port);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_remote_as(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, bgp_proto->remote_as);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_in_updates(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_counter32(c, bgp_stats->rx_updates);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_out_update(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_counter32(c, bgp_stats->tx_updates);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_in_total_msg(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_counter32(c, bgp_stats->rx_messages);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_out_total_msg(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_counter32(c, bgp_stats->tx_messages);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_last_err(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < snmp_str_size_from_len(2))
snmp_manage_tbuf(p, c);
char last_error[2];
snmp_bgp_last_error(bgp_proto, last_error);
snmp_varbind_nstr(c, last_error, 2);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_established_trans(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_counter32(c,
bgp_stats->fsm_established_transitions);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_established_time(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_gauge32(c,
(current_time() - bgp_proto->last_established) TO_S);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_retry_interval(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, bgp_conf->connect_retry_time);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_hold_time(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, (bgp_conn) ? bgp_conn->hold_time : 0);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_keep_alive(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
if (!bgp_conf->hold_time)
snmp_varbind_int(c, 0);
else
snmp_varbind_int(c,
(bgp_conn) ? bgp_conn->keepalive_time : 0);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_hold_time_conf(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, bgp_conf->hold_time);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_keep_alive_conf(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
if (!bgp_conf->keepalive_time)
snmp_varbind_int(c, 0);
else
snmp_varbind_int(c,
(bgp_conn) ? bgp_conn->keepalive_time : 0);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_min_as_org_interval(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
/* value should be in 1..65535 but is not supported by bird */
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, 0);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_route_adv_interval(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
/* value should be in 1..65535 but is not supported by bird */
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_int(c, 0);
return SNMP_SEARCH_OK;
}
static enum snmp_search_res
fill_in_update_elapsed_time(struct snmp_proto *p, struct snmp_pdu *c)
{
enum snmp_search_res res;
DECLARE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
res = POPULATE_BGP4(addr, bgp_proto, bgp_conn, bgp_stats, bgp_conf);
if (res != SNMP_SEARCH_OK)
{
(void) snmp_set_varbind_type(c->sr_vb_start, res);
return res;
}
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
snmp_varbind_gauge32(c,
(current_time() - bgp_proto->last_rx_update) TO_S
);
return SNMP_SEARCH_OK;
}
static struct oid *
update_bgp_vb(struct snmp_proto *p, struct agentx_varbind **vb, u8 state, struct snmp_pdu *c)
{
struct oid *oid = &(*vb)->name;
if (state == BGP4_MIB_S_END || state == BGP4_MIB_S_INVALID ||
state == BGP4_MIB_S_NO_VALUE)
return &(*vb)->name;
/* No need to reallocate anything if the OID has same lin. state */
if (snmp_bgp_state(oid) == state)
{
if (state >= BGP4_MIB_S_PEER_IDENTIFIER &&
state <= BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME &&
oid->n_subid == 9)
return oid;
if (state >= BGP4_MIB_S_VERSION &&
state <= BGP4_MIB_S_PEER_TABLE && oid->n_subid == 3)
return oid;
if (state == BGP4_MIB_S_PEER_ENTRY && oid->n_subid == 4)
return oid;
if (state == BGP4_MIB_S_BGP && oid->n_subid == 2)
return oid;
}
switch (state)
{
case BGP4_MIB_S_BGP:
/* This could potentially destroy same old data */
if (oid->n_subid != 2)
oid = snmp_varbind_set_name_len(p, vb, 2, c);
oid->ids[0] = SNMP_MIB_2;
oid->ids[1] = BGP4_MIB;
break;
case BGP4_MIB_S_VERSION:
if (oid->n_subid != 3)
oid = snmp_varbind_set_name_len(p, vb, 3, c);
oid->ids[2] = BGP4_MIB_VERSION;
break;
case BGP4_MIB_S_LOCAL_AS:
if (oid->n_subid != 3)
oid =snmp_varbind_set_name_len(p, vb, 3, c);
oid->ids[2] = BGP4_MIB_LOCAL_AS;
break;
case BGP4_MIB_S_PEER_IDENTIFIER:
if (oid->n_subid != 9)
{
u8 n_subid = LOAD_U8(oid->n_subid);
oid = snmp_varbind_set_name_len(p, vb, 9, c);
if (n_subid < 6)
oid->ids[5] = 0;
if (n_subid < 7)
oid->ids[6] = 0;
if (n_subid < 8)
oid->ids[7] = 0;
if (n_subid < 9)
oid->ids[8] = 0;
}
oid->ids[2] = BGP4_MIB_PEER_TABLE;
oid->ids[3] = BGP4_MIB_PEER_ENTRY;
oid->ids[4] = BGP4_MIB_PEER_IDENTIFIER;
break;
#define SNMP_UPDATE_CASE(num, update) \
case num: \
if (oid->n_subid != 9) \
{ \
u8 n_subid = LOAD_U8(oid->n_subid); \
oid = snmp_varbind_set_name_len(p, vb, 9, c); \
\
if (n_subid < 6) \
oid->ids[5] = 0; \
if (n_subid < 7) \
oid->ids[6] = 0; \
if (n_subid < 8) \
oid->ids[7] = 0; \
if (n_subid < 9) \
oid->ids[8] = 0; \
} \
\
oid->n_subid = 9; \
oid->ids[4] = update; \
break;
SNMP_UPDATE_CASE(BGP4_MIB_S_STATE, BGP4_MIB_STATE)
SNMP_UPDATE_CASE(BGP4_MIB_S_ADMIN_STATUS, BGP4_MIB_ADMIN_STATUS)
SNMP_UPDATE_CASE(BGP4_MIB_S_NEGOTIATED_VERSION, BGP4_MIB_NEGOTIATED_VERSION)
SNMP_UPDATE_CASE(BGP4_MIB_S_LOCAL_ADDR, BGP4_MIB_LOCAL_ADDR)
SNMP_UPDATE_CASE(BGP4_MIB_S_LOCAL_PORT, BGP4_MIB_LOCAL_PORT)
SNMP_UPDATE_CASE(BGP4_MIB_S_REMOTE_ADDR, BGP4_MIB_REMOTE_ADDR)
SNMP_UPDATE_CASE(BGP4_MIB_S_REMOTE_PORT, BGP4_MIB_REMOTE_PORT)
SNMP_UPDATE_CASE(BGP4_MIB_S_REMOTE_AS, BGP4_MIB_REMOTE_AS)
SNMP_UPDATE_CASE(BGP4_MIB_S_RX_UPDATES, BGP4_MIB_RX_UPDATES)
SNMP_UPDATE_CASE(BGP4_MIB_S_TX_UPDATES, BGP4_MIB_TX_UPDATES)
SNMP_UPDATE_CASE(BGP4_MIB_S_RX_MESSAGES, BGP4_MIB_RX_MESSAGES)
SNMP_UPDATE_CASE(BGP4_MIB_S_TX_MESSAGES, BGP4_MIB_TX_MESSAGES)
SNMP_UPDATE_CASE(BGP4_MIB_S_LAST_ERROR, BGP4_MIB_LAST_ERROR)
SNMP_UPDATE_CASE(BGP4_MIB_S_FSM_TRANSITIONS, BGP4_MIB_FSM_TRANSITIONS)
SNMP_UPDATE_CASE(BGP4_MIB_S_FSM_ESTABLISHED_TIME, BGP4_MIB_FSM_ESTABLISHED_TIME)
SNMP_UPDATE_CASE(BGP4_MIB_S_RETRY_INTERVAL, BGP4_MIB_RETRY_INTERVAL)
SNMP_UPDATE_CASE(BGP4_MIB_S_HOLD_TIME, BGP4_MIB_HOLD_TIME)
SNMP_UPDATE_CASE(BGP4_MIB_S_KEEPALIVE, BGP4_MIB_KEEPALIVE)
SNMP_UPDATE_CASE(BGP4_MIB_S_HOLD_TIME_CONFIGURED, BGP4_MIB_HOLD_TIME_CONFIGURED)
SNMP_UPDATE_CASE(BGP4_MIB_S_KEEPALIVE_CONFIGURED, BGP4_MIB_KEEPALIVE_CONFIGURED)
SNMP_UPDATE_CASE(BGP4_MIB_S_ORIGINATION_INTERVAL, BGP4_MIB_ORIGINATION_INTERVAL)
SNMP_UPDATE_CASE(BGP4_MIB_S_MIN_ROUTE_ADVERTISEMENT, BGP4_MIB_MIN_ROUTE_ADVERTISEMENT)
SNMP_UPDATE_CASE(BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME, BGP4_MIB_IN_UPDATE_ELAPSED_TIME)
case BGP4_MIB_S_IDENTIFIER:
if (oid->n_subid != 3)
oid = snmp_varbind_set_name_len(p, vb, 3, c);
oid->n_subid = 3;
oid->ids[2] = 4;
break;
default:
/* intentionally left blank */
break;
}
return oid;
#undef SNMP_UPDATE_CASE
}
/**
* snmp_bgp_find_next_oid - walk bgp peer addresses and update @o_start oid
*
* @p:
* @oid:
* @contid:
*/
static int
snmp_bgp_find_next_oid(struct snmp_proto *p, struct oid *oid, uint UNUSED contid)
{
ip4_addr ip4 = ip4_from_oid(oid);
net_addr net;
net_fill_ip4(&net, ip4, IP4_MAX_PREFIX_LENGTH);
struct f_trie_walk_state ws;
int match = trie_walk_init(&ws, p->bgp_trie, &net, 1);
if (match && oid->include)
{
oid->include = 0;
return 1;
}
/* We skip the first match as we should not include ip address in oid */
if (match)
{
trie_walk_next(&ws, &net);
}
if (trie_walk_next(&ws, &net))
{
ASSUME(oid->n_subid == 9);
ip4_addr res = ipa_to_ip4(net_prefix(&net));
ip4_to_oid(oid, res);
return 1;
}
return 0;
}
static enum snmp_search_res UNUSED
snmp_bgp_search_dynamic(struct snmp_proto *p, struct oid **searched, const struct oid *o_end, uint UNUSED contid, u8 next_state, struct snmp_pdu *c)
{
struct oid *oid = *searched;
u8 end_state = MIN(snmp_bgp_state(o_end), BGP4_MIB_S_PEER_TABLE_END);
ASSUME(end_state <= BGP4_MIB_S_END);
ASSUME(oid != NULL);
// TODO TODO remove me
struct agentx_varbind data = { 0 };
struct agentx_varbind *vb = &data;
oid = update_bgp_vb(p, &vb, next_state, c);
//oid = update_bgp_oid(oid, next_state);
int found;
while (!(found = snmp_bgp_find_next_oid(p, oid, contid)) && next_state <= end_state)
{
next_state = snmp_bgp_next_state(next_state);
if (next_state == BGP4_MIB_S_IDENTIFIER)
break;
//oid = update_bgp_oid(oid, next_state);
oid = update_bgp_vb(p, &vb, next_state, c);
/* In case of search for next bgp state, we want to start from beginning. */
oid->ids[5] = oid->ids[6] = oid->ids[7] = oid->ids[8] = 0;
}
if (next_state < BGP4_MIB_S_PEER_TABLE_END && next_state <= end_state)
{
*searched = oid;
return SNMP_SEARCH_OK;
}
return SNMP_SEARCH_END_OF_VIEW;
}
enum snmp_search_res
snmp_bgp_search(struct snmp_proto *p, struct agentx_varbind **vb_search, const struct oid *o_end, struct snmp_pdu *c)
{
(void)p;
(void)vb_search;
(void)o_end;
(void)c;
return SNMP_SEARCH_END_OF_VIEW;
#if 0
enum snmp_search_res r = SNMP_SEARCH_END_OF_VIEW;
u8 bgp_state = snmp_bgp_state(*searched);
u8 state;
if (bgp_state == BGP4_MIB_S_END)
{
return SNMP_SEARCH_NO_OBJECT;
}
if (is_static(bgp_state) && (*searched)->include)
{
return SNMP_SEARCH_OK;
}
state = snmp_bgp_next_state(bgp_state);
if (is_static(state) && !is_dynamic(bgp_state))
{
*searched = update_bgp_oid(*searched, state);
return SNMP_SEARCH_OK;
}
if (is_dynamic(state) && !is_dynamic(bgp_state))
{
for (uint i = 5; i < MIN(9, (*searched)->n_subid); i++)
(*searched)->ids[i] = 0;
r = snmp_bgp_search_dynamic(p, searched, o_end, contid, state);
if (r != SNMP_SEARCH_END_OF_VIEW)
return r;
}
if (is_dynamic(bgp_state))
{
r = snmp_bgp_search_dynamic(p, searched, o_end, contid, bgp_state);
if (r != SNMP_SEARCH_END_OF_VIEW)
return r;
}
state = snmp_bgp_next_state(bgp_state);
if (state <= BGP4_MIB_S_IDENTIFIER)
{
*searched = update_bgp_oid(*searched, state);
return SNMP_SEARCH_OK;
}
// TODO add route table
/* end not found */
return SNMP_SEARCH_END_OF_VIEW;
#endif
}
static void
bgp_fill_dynamic(struct snmp_proto *p, struct agentx_varbind **vb, struct snmp_pdu *c, u8 state)
{
struct oid *oid = &(*vb)->name;
//byte *pkt;
ip4_addr addr;
if (oid_state_compare(oid, state) == 0 && snmp_bgp_valid_ip4(oid))
addr = ip4_from_oid(oid);
else
{
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
return;
}
struct snmp_bgp_peer *pe = snmp_hash_find(p, addr);
if (!pe)
{
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
return;
}
const struct bgp_proto *bgp_proto = pe->bgp_proto;
if (!ipa_is_ip4(bgp_proto->remote_ip))
{
log(L_ERR, "%s: Found BGP protocol instance with IPv6 address", bgp_proto->p.name);
c->error = AGENTX_RES_GEN_ERROR;
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
return;
}
ip4_addr proto_ip = ipa_to_ip4(bgp_proto->remote_ip);
if (!ip4_equal(proto_ip, pe->peer_ip))
{
/* Here, we could be in problem as the bgp_proto IP address could be changed */
log(L_ERR, "%s: Stored hash key IP address and peer remote address differ.",
bgp_proto->p.name);
c->error = AGENTX_RES_GEN_ERROR;
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
return;
}
const struct bgp_conn *bgp_conn = bgp_proto->conn;
const struct bgp_stats *bgp_stats = &bgp_proto->stats;
const struct bgp_config *bgp_conf = bgp_proto->cf;
uint fsm_state = snmp_bgp_fsm_state(bgp_proto);
char last_error[2];
snmp_bgp_last_error(bgp_proto, last_error);
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
switch (state)
{
case BGP4_MIB_S_PEER_IDENTIFIER:
if (c->size < AGENTX_TYPE_IP4_SIZE)
snmp_manage_tbuf(p, c);
if (fsm_state == BGP4_MIB_OPENCONFIRM || fsm_state == BGP4_MIB_ESTABLISHED)
// TODO last
; //snmp_varbind_ip4(*vb, c, ip4_from_u32(bgp_proto->remote_id));
else
; //snmp_varbind_ip4(*vb, c, IP4_NONE);
break;
case BGP4_MIB_S_STATE:
if (c->size < AGENTX_TYPE_INT_SIZE)
snmp_manage_tbuf(p, c);
//snmp_varbind_int(*vb, c, fsm_state);
break;
case BGP4_MIB_S_ADMIN_STATUS:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
if (bgp_proto->p.disabled)
; //snmp_varbind_int(*vb, c, AGENTX_ADMIN_STOP);
else
; //snmp_varbind_int(*vb, c, AGENTX_ADMIN_START);
break;
case BGP4_MIB_S_NEGOTIATED_VERSION:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
uint fsm_state = snmp_bgp_fsm_state(bgp_proto);
if (fsm_state == BGP4_MIB_ESTABLISHED || fsm_state == BGP4_MIB_ESTABLISHED)
; //snmp_varbind_int(*vb, c, BGP4_MIB_NEGOTIATED_VER_VALUE);
else
; //snmp_varbind_int(*vb, c, BGP4_MIB_NEGOTIATED_VER_NO_VALUE);
break;
case BGP4_MIB_S_LOCAL_ADDR:
if (c->size < AGENTX_TYPE_IP4_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_ip4(*vb, c, ipa_to_ip4(bgp_proto->local_ip));
break;
case BGP4_MIB_S_LOCAL_PORT:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_int(*vb, c, bgp_conf->local_port);
break;
case BGP4_MIB_S_REMOTE_ADDR:
if (c->size < AGENTX_TYPE_IP4_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_ip4(*vb, c, ipa_to_ip4(bgp_proto->remote_ip));
break;
case BGP4_MIB_S_REMOTE_PORT:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_int(*vb, c, bgp_conf->remote_port);
break;
case BGP4_MIB_S_REMOTE_AS:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_int(*vb, c, bgp_proto->remote_as);
break;
case BGP4_MIB_S_RX_UPDATES: /* bgpPeerInUpdates */
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_counter32(*vb, c, bgp_stats->rx_updates);
break;
case BGP4_MIB_S_TX_UPDATES: /* bgpPeerOutUpdate */
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_counter32(*vb, c, bgp_stats->tx_updates);
break;
case BGP4_MIB_S_RX_MESSAGES: /* bgpPeerInTotalMessages */
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_counter32(*vb, c, bgp_stats->rx_messages);
break;
case BGP4_MIB_S_TX_MESSAGES: /* bgpPeerOutTotalMessages */
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_counter32(*vb, c, bgp_stats->tx_messages);
break;
case BGP4_MIB_S_LAST_ERROR:
if (c->size < snmp_str_size_from_len(2))
SNMP_MANAGE_TBUF(p, vb, c);
; //snmp_varbind_nstr(*vb, c, last_error, 2);
break;
case BGP4_MIB_S_FSM_TRANSITIONS:
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_counter32(*vb, c,
// bgp_stats->fsm_established_transitions);
break;
case BGP4_MIB_S_FSM_ESTABLISHED_TIME:
if (c->size < AGENTX_TYPE_COUNTER32_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_gauge32(*vb, c,
// (current_time() - bgp_proto->last_established) TO_S);
break;
case BGP4_MIB_S_RETRY_INTERVAL: /* retry inverval value should be != 0 */
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, bgp_conf->connect_retry_time);
break;
case BGP4_MIB_S_HOLD_TIME: /* hold time should be == 0 or in 3..65535 */
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, (bgp_conn) ? bgp_conn->hold_time : 0);
break;
case BGP4_MIB_S_KEEPALIVE:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
if (!bgp_conf->hold_time)
; //snmp_varbind_int(*vb, c, 0);
else
; //snmp_varbind_int(*vb, c,
// (bgp_conn) ? bgp_conn->keepalive_time : 0);
break;
case BGP4_MIB_S_HOLD_TIME_CONFIGURED:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, bgp_conf->hold_time);
break;
case BGP4_MIB_S_KEEPALIVE_CONFIGURED:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
if (!bgp_conf->keepalive_time)
; //snmp_varbind_int(*vb, c, 0);
else
; //snmp_varbind_int(*vb, c,
// (bgp_conn) ? bgp_conn->keepalive_time : 0);
break;
case BGP4_MIB_S_ORIGINATION_INTERVAL:
/* value should be in 1..65535 but is not supported by bird */
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, 0);
break;
case BGP4_MIB_S_MIN_ROUTE_ADVERTISEMENT:
/* value should be in 1..65535 but is not supported by bird */
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, 0);
break;
case BGP4_MIB_S_IN_UPDATE_ELAPSED_TIME:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_gauge32(*vb, c,
//(current_time() - bgp_proto->last_rx_update) TO_S
//);
break;
case BGP4_MIB_S_END:
break;
case BGP4_MIB_S_INVALID:
break;
case BGP4_MIB_S_BGP:
break;
case BGP4_MIB_S_PEER_TABLE:
break;
case BGP4_MIB_S_PEER_ENTRY:
break;
case BGP4_MIB_S_NO_VALUE:
break;
}
}
void
bgp_fill_static(struct snmp_proto *p, struct agentx_varbind **vb, struct snmp_pdu *c, u8 state)
{
ASSUME(c->buffer == snmp_varbind_data(*vb));
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_state_compare(oid, state) < 0 || state == BGP4_MIB_S_END)
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_OBJECT);
else if (oid_state_compare(oid, state) > 0)
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_INSTANCE);
switch (state)
{
case BGP4_MIB_S_VERSION:;
uint sz = snmp_str_size_from_len(1);
if (c->size < sz)
SNMP_MANAGE_TBUF(p, vb, c);
c->size -= sz;
//snmp_varbind_nstr(*vb, c, BGP4_VERSIONS, 1);
break;
case BGP4_MIB_S_LOCAL_AS:
if (c->size < AGENTX_TYPE_INT_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_int(*vb, c, p->bgp_local_as);
break;
case BGP4_MIB_S_IDENTIFIER:
if (c->size < AGENTX_TYPE_IP4_SIZE)
SNMP_MANAGE_TBUF(p, vb, c);
//snmp_varbind_ip4(*vb, c, p->bgp_local_id);
break;
default:
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_OBJECT);
break;
}
}
void
snmp_bgp_fill(struct snmp_proto *p, struct agentx_varbind **vb, struct snmp_pdu *c)
{
ASSERT(vb != NULL);
u8 state = snmp_bgp_state(&((*vb)->name));
if (is_static(state))
{
bgp_fill_static(p, vb, c, state);
return;
}
if (is_dynamic(state))
{
bgp_fill_dynamic(p, vb, c, state);
return;
}
snmp_set_varbind_type(*vb, AGENTX_NO_SUCH_OBJECT);
}
/*
* snmp_bgp_start - prepare BGP4-MIB
* @p - SNMP protocol instance holding memory pool
*
* This function create all runtime bindings to BGP procotol structures.
* It is gruaranteed that the BGP protocols exist.
*/
void
snmp_bgp_start(struct snmp_proto *p)
{
struct snmp_config *cf = SKIP_BACK(struct snmp_config, cf, p->p.cf);
/* Create binding to BGP protocols */
struct snmp_bond *b;
WALK_LIST(b, cf->bgp_entries)
{
const struct bgp_config *bgp_config = (struct bgp_config *) b->config;
const struct bgp_proto *bgp = SKIP_BACK(struct bgp_proto, p,
bgp_config->c.proto);
struct snmp_bgp_peer *peer = \
mb_alloc(p->pool, sizeof(struct snmp_bgp_peer));
peer->bgp_proto = bgp;
peer->peer_ip = ipa_to_ip4(bgp->remote_ip);
struct net_addr net;
net_fill_ip4(&net, ipa_to_ip4(bgp->remote_ip), IP4_MAX_PREFIX_LENGTH);
trie_add_prefix(p->bgp_trie, &net, IP4_MAX_PREFIX_LENGTH,
IP4_MAX_PREFIX_LENGTH);
snmp_hash_add_peer(p, peer);
}
}
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