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Merge pull request #12311 from opensourcerouting/feature/bgp_snmp_bgp4v2-mib

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bgpd: Implement SNMP BGP4V2-MIB (bgp4V2PeerEntry)
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Russ White 2022-11-22 14:58:22 -05:00 committed by GitHub
commit 2387dca4dc
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 1505 additions and 856 deletions
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bgpd/bgp_snmp.c
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@ -40,864 +40,16 @@
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_snmp.h"
#include "bgpd/bgp_snmp_bgp4.h"
#include "bgpd/bgp_snmp_bgp4v2.h"
#include "bgpd/bgp_mplsvpn_snmp.h"
/* BGP4-MIB described in RFC1657. */
#define BGP4MIB 1,3,6,1,2,1,15
/* BGP TRAP. */
#define BGPESTABLISHED 1
#define BGPBACKWARDTRANSITION 2
/* BGP MIB bgpVersion. */
#define BGPVERSION 0
/* BGP MIB bgpLocalAs. */
#define BGPLOCALAS 0
/* BGP MIB bgpPeerTable. */
#define BGPPEERIDENTIFIER 1
#define BGPPEERSTATE 2
#define BGPPEERADMINSTATUS 3
#define BGPPEERNEGOTIATEDVERSION 4
#define BGPPEERLOCALADDR 5
#define BGPPEERLOCALPORT 6
#define BGPPEERREMOTEADDR 7
#define BGPPEERREMOTEPORT 8
#define BGPPEERREMOTEAS 9
#define BGPPEERINUPDATES 10
#define BGPPEEROUTUPDATES 11
#define BGPPEERINTOTALMESSAGES 12
#define BGPPEEROUTTOTALMESSAGES 13
#define BGPPEERLASTERROR 14
#define BGPPEERFSMESTABLISHEDTRANSITIONS 15
#define BGPPEERFSMESTABLISHEDTIME 16
#define BGPPEERCONNECTRETRYINTERVAL 17
#define BGPPEERHOLDTIME 18
#define BGPPEERKEEPALIVE 19
#define BGPPEERHOLDTIMECONFIGURED 20
#define BGPPEERKEEPALIVECONFIGURED 21
#define BGPPEERMINROUTEADVERTISEMENTINTERVAL 22
#define BGPPEERINUPDATEELAPSEDTIME 23
/* BGP MIB bgpIdentifier. */
#define BGPIDENTIFIER 0
/* BGP MIB bgpRcvdPathAttrTable */
#define BGPPATHATTRPEER 1
#define BGPPATHATTRDESTNETWORK 2
#define BGPPATHATTRORIGIN 3
#define BGPPATHATTRASPATH 4
#define BGPPATHATTRNEXTHOP 5
#define BGPPATHATTRINTERASMETRIC 6
/* BGP MIB bgp4PathAttrTable. */
#define BGP4PATHATTRPEER 1
#define BGP4PATHATTRIPADDRPREFIXLEN 2
#define BGP4PATHATTRIPADDRPREFIX 3
#define BGP4PATHATTRORIGIN 4
#define BGP4PATHATTRASPATHSEGMENT 5
#define BGP4PATHATTRNEXTHOP 6
#define BGP4PATHATTRMULTIEXITDISC 7
#define BGP4PATHATTRLOCALPREF 8
#define BGP4PATHATTRATOMICAGGREGATE 9
#define BGP4PATHATTRAGGREGATORAS 10
#define BGP4PATHATTRAGGREGATORADDR 11
#define BGP4PATHATTRCALCLOCALPREF 12
#define BGP4PATHATTRBEST 13
#define BGP4PATHATTRUNKNOWN 14
/* SNMP value hack. */
#define INTEGER ASN_INTEGER
#define INTEGER32 ASN_INTEGER
#define COUNTER32 ASN_COUNTER
#define OCTET_STRING ASN_OCTET_STR
#define IPADDRESS ASN_IPADDRESS
#define GAUGE32 ASN_UNSIGNED
/* Declare static local variables for convenience. */
SNMP_LOCAL_VARIABLES
/* BGP-MIB instances. */
static oid bgp_oid[] = {BGP4MIB};
static oid bgp_trap_oid[] = {BGP4MIB, 0};
/* IP address 0.0.0.0. */
static struct in_addr bgp_empty_addr = {.s_addr = 0};
/* Hook functions. */
static uint8_t *bgpVersion(struct variable *, oid[], size_t *, int, size_t *,
WriteMethod **);
static uint8_t *bgpLocalAs(struct variable *, oid[], size_t *, int, size_t *,
WriteMethod **);
static uint8_t *bgpPeerTable(struct variable *, oid[], size_t *, int, size_t *,
WriteMethod **);
static uint8_t *bgpRcvdPathAttrTable(struct variable *, oid[], size_t *, int,
size_t *, WriteMethod **);
static uint8_t *bgpIdentifier(struct variable *, oid[], size_t *, int, size_t *,
WriteMethod **);
static uint8_t *bgp4PathAttrTable(struct variable *, oid[], size_t *, int,
size_t *, WriteMethod **);
/* static uint8_t *bgpTraps (); */
static struct variable bgp_variables[] = {
/* BGP version. */
{BGPVERSION, OCTET_STRING, RONLY, bgpVersion, 1, {1}},
/* BGP local AS. */
{BGPLOCALAS, INTEGER, RONLY, bgpLocalAs, 1, {2}},
/* BGP peer table. */
{BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 1}},
{BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 2}},
{BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable, 3, {3, 1, 3}},
{BGPPEERNEGOTIATEDVERSION,
INTEGER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 4}},
{BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 5}},
{BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 6}},
{BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 7}},
{BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 8}},
{BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 9}},
{BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 10}},
{BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 11}},
{BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 12}},
{BGPPEEROUTTOTALMESSAGES,
COUNTER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 13}},
{BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable, 3, {3, 1, 14}},
{BGPPEERFSMESTABLISHEDTRANSITIONS,
COUNTER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 15}},
{BGPPEERFSMESTABLISHEDTIME,
GAUGE32,
RONLY,
bgpPeerTable,
3,
{3, 1, 16}},
{BGPPEERCONNECTRETRYINTERVAL,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 17}},
{BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 18}},
{BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 19}},
{BGPPEERHOLDTIMECONFIGURED,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 20}},
{BGPPEERKEEPALIVECONFIGURED,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 21}},
{BGPPEERMINROUTEADVERTISEMENTINTERVAL,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 23}},
{BGPPEERINUPDATEELAPSEDTIME,
GAUGE32,
RONLY,
bgpPeerTable,
3,
{3, 1, 24}},
/* BGP identifier. */
{BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier, 1, {4}},
/* BGP received path attribute table. */
{BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 1}},
{BGPPATHATTRDESTNETWORK,
IPADDRESS,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 2}},
{BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 3}},
{BGPPATHATTRASPATH,
OCTET_STRING,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 4}},
{BGPPATHATTRNEXTHOP,
IPADDRESS,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 5}},
{BGPPATHATTRINTERASMETRIC,
INTEGER32,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 6}},
/* BGP-4 received path attribute table. */
{BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable, 3, {6, 1, 1}},
{BGP4PATHATTRIPADDRPREFIXLEN,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 2}},
{BGP4PATHATTRIPADDRPREFIX,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 3}},
{BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 4}},
{BGP4PATHATTRASPATHSEGMENT,
OCTET_STRING,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 5}},
{BGP4PATHATTRNEXTHOP,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 6}},
{BGP4PATHATTRMULTIEXITDISC,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 7}},
{BGP4PATHATTRLOCALPREF,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 8}},
{BGP4PATHATTRATOMICAGGREGATE,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 9}},
{BGP4PATHATTRAGGREGATORAS,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 10}},
{BGP4PATHATTRAGGREGATORADDR,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 11}},
{BGP4PATHATTRCALCLOCALPREF,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 12}},
{BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 13}},
{BGP4PATHATTRUNKNOWN,
OCTET_STRING,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 14}},
};
static uint8_t *bgpVersion(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
static uint8_t version;
if (smux_header_generic(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
/* Return BGP version. Zebra bgpd only support version 4. */
version = (0x80 >> (BGP_VERSION_4 - 1));
/* Return octet string length 1. */
*var_len = 1;
return &version;
}
static uint8_t *bgpLocalAs(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
if (smux_header_generic(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
/* Get BGP structure. */
bgp = bgp_get_default();
if (!bgp)
return NULL;
return SNMP_INTEGER(bgp->as);
}
static struct peer *peer_lookup_addr_ipv4(struct in_addr *src)
{
struct bgp *bgp;
struct peer *peer;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (sockunion_family(&peer->su) != AF_INET)
continue;
if (sockunion2ip(&peer->su) == src->s_addr)
return peer;
}
}
return NULL;
}
static struct peer *bgp_peer_lookup_next(struct in_addr *src)
{
struct bgp *bgp;
struct peer *peer;
struct peer *next_peer = NULL;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (sockunion_family(&peer->su) != AF_INET)
continue;
if (ntohl(sockunion2ip(&peer->su)) <= ntohl(src->s_addr))
continue;
if (!next_peer
|| ntohl(sockunion2ip(&next_peer->su))
> ntohl(sockunion2ip(&peer->su))) {
next_peer = peer;
}
}
}
if (next_peer) {
src->s_addr = sockunion2ip(&next_peer->su);
return next_peer;
}
return NULL;
}
/* 1.3.6.1.2.1.15.3.1.x = 10 */
#define PEERTAB_NAMELEN 10
static struct peer *bgpPeerTable_lookup(struct variable *v, oid name[],
size_t *length, struct in_addr *addr,
int exact)
{
struct peer *peer = NULL;
size_t namelen = v ? v->namelen : PEERTAB_NAMELEN;
int len;
if (exact) {
/* Check the length. */
if (*length - namelen != sizeof(struct in_addr))
return NULL;
oid2in_addr(name + namelen, IN_ADDR_SIZE, addr);
peer = peer_lookup_addr_ipv4(addr);
return peer;
} else {
len = *length - namelen;
if (len > 4)
len = 4;
oid2in_addr(name + namelen, len, addr);
peer = bgp_peer_lookup_next(addr);
if (peer == NULL)
return NULL;
oid_copy_in_addr(name + namelen, addr);
*length = sizeof(struct in_addr) + namelen;
return peer;
}
return NULL;
}
/* BGP write methods. */
static int write_bgpPeerTable(int action, uint8_t *var_val,
uint8_t var_val_type, size_t var_val_len,
uint8_t *statP, oid *name, size_t length)
{
struct in_addr addr;
struct peer *peer;
long intval;
if (var_val_type != ASN_INTEGER) {
return SNMP_ERR_WRONGTYPE;
}
if (var_val_len != sizeof(long)) {
return SNMP_ERR_WRONGLENGTH;
}
intval = *(long *)var_val;
memset(&addr, 0, sizeof(addr));
peer = bgpPeerTable_lookup(NULL, name, &length, &addr, 1);
if (!peer)
return SNMP_ERR_NOSUCHNAME;
if (action != SNMP_MSG_INTERNAL_SET_COMMIT)
return SNMP_ERR_NOERROR;
zlog_info("%s: SNMP write .%ld = %ld", peer->host,
(long)name[PEERTAB_NAMELEN - 1], intval);
switch (name[PEERTAB_NAMELEN - 1]) {
case BGPPEERADMINSTATUS:
#define BGP_PeerAdmin_stop 1
#define BGP_PeerAdmin_start 2
/* When the peer is established, */
if (intval == BGP_PeerAdmin_stop)
BGP_EVENT_ADD(peer, BGP_Stop);
else if (intval == BGP_PeerAdmin_start)
; /* Do nothing. */
else
return SNMP_ERR_NOSUCHNAME;
break;
case BGPPEERCONNECTRETRYINTERVAL:
peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
peer->connect = intval;
peer->v_connect = intval;
break;
case BGPPEERHOLDTIMECONFIGURED:
peer_flag_set(peer, PEER_FLAG_TIMER);
peer->holdtime = intval;
peer->v_holdtime = intval;
break;
case BGPPEERKEEPALIVECONFIGURED:
peer_flag_set(peer, PEER_FLAG_TIMER);
peer->keepalive = intval;
peer->v_keepalive = intval;
break;
case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
peer->v_routeadv = intval;
break;
}
return SNMP_ERR_NOERROR;
}
static uint8_t *bgpPeerTable(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
static struct in_addr addr;
struct peer *peer;
uint32_t ui, uo;
if (smux_header_table(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
memset(&addr, 0, sizeof(addr));
peer = bgpPeerTable_lookup(v, name, length, &addr, exact);
if (!peer)
return NULL;
switch (v->magic) {
case BGPPEERIDENTIFIER:
return SNMP_IPADDRESS(peer->remote_id);
case BGPPEERSTATE:
return SNMP_INTEGER(peer->status);
case BGPPEERADMINSTATUS:
*write_method = write_bgpPeerTable;
#define BGP_PeerAdmin_stop 1
#define BGP_PeerAdmin_start 2
if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN))
return SNMP_INTEGER(BGP_PeerAdmin_stop);
else
return SNMP_INTEGER(BGP_PeerAdmin_start);
case BGPPEERNEGOTIATEDVERSION:
return SNMP_INTEGER(BGP_VERSION_4);
case BGPPEERLOCALADDR:
if (peer->su_local)
return SNMP_IPADDRESS(peer->su_local->sin.sin_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGPPEERLOCALPORT:
if (peer->su_local)
return SNMP_INTEGER(
ntohs(peer->su_local->sin.sin_port));
else
return SNMP_INTEGER(0);
case BGPPEERREMOTEADDR:
if (peer->su_remote)
return SNMP_IPADDRESS(peer->su_remote->sin.sin_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGPPEERREMOTEPORT:
if (peer->su_remote)
return SNMP_INTEGER(
ntohs(peer->su_remote->sin.sin_port));
else
return SNMP_INTEGER(0);
case BGPPEERREMOTEAS:
return SNMP_INTEGER(peer->as);
case BGPPEERINUPDATES:
ui = atomic_load_explicit(&peer->update_in,
memory_order_relaxed);
return SNMP_INTEGER(ui);
case BGPPEEROUTUPDATES:
uo = atomic_load_explicit(&peer->update_out,
memory_order_relaxed);
return SNMP_INTEGER(uo);
case BGPPEERINTOTALMESSAGES:
return SNMP_INTEGER(PEER_TOTAL_RX(peer));
case BGPPEEROUTTOTALMESSAGES:
return SNMP_INTEGER(PEER_TOTAL_TX(peer));
case BGPPEERLASTERROR: {
static uint8_t lasterror[2];
lasterror[0] = peer->notify.code;
lasterror[1] = peer->notify.subcode;
*var_len = 2;
return (uint8_t *)&lasterror;
}
case BGPPEERFSMESTABLISHEDTRANSITIONS:
return SNMP_INTEGER(peer->established);
case BGPPEERFSMESTABLISHEDTIME:
if (peer->uptime == 0)
return SNMP_INTEGER(0);
else
return SNMP_INTEGER(monotime(NULL) - peer->uptime);
case BGPPEERCONNECTRETRYINTERVAL:
*write_method = write_bgpPeerTable;
return SNMP_INTEGER(peer->v_connect);
case BGPPEERHOLDTIME:
return SNMP_INTEGER(peer->v_holdtime);
case BGPPEERKEEPALIVE:
return SNMP_INTEGER(peer->v_keepalive);
case BGPPEERHOLDTIMECONFIGURED:
*write_method = write_bgpPeerTable;
if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
return SNMP_INTEGER(peer->holdtime);
else
return SNMP_INTEGER(peer->v_holdtime);
case BGPPEERKEEPALIVECONFIGURED:
*write_method = write_bgpPeerTable;
if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
return SNMP_INTEGER(peer->keepalive);
else
return SNMP_INTEGER(peer->v_keepalive);
case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
*write_method = write_bgpPeerTable;
return SNMP_INTEGER(peer->v_routeadv);
case BGPPEERINUPDATEELAPSEDTIME:
if (peer->update_time == 0)
return SNMP_INTEGER(0);
else
return SNMP_INTEGER(monotime(NULL) - peer->update_time);
default:
return NULL;
}
return NULL;
}
static uint8_t *bgpIdentifier(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
if (smux_header_generic(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
bgp = bgp_get_default();
if (!bgp)
return NULL;
return SNMP_IPADDRESS(bgp->router_id);
}
static uint8_t *bgpRcvdPathAttrTable(struct variable *v, oid name[],
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
/* Received Path Attribute Table. This table contains, one entry
per path to a network, path attributes received from all peers
running BGP version 3 or less. This table is obsolete, having
been replaced in functionality with the bgp4PathAttrTable. */
return NULL;
}
static struct bgp_path_info *bgp4PathAttrLookup(struct variable *v, oid name[],
size_t *length, struct bgp *bgp,
struct prefix_ipv4 *addr,
int exact)
{
oid *offset;
int offsetlen;
struct bgp_path_info *path;
struct bgp_path_info *min;
struct bgp_dest *dest;
union sockunion su;
unsigned int len;
struct in_addr paddr;
sockunion_init(&su);
#define BGP_PATHATTR_ENTRY_OFFSET (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE)
if (exact) {
if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET)
return NULL;
/* Set OID offset for prefix. */
offset = name + v->namelen;
oid2in_addr(offset, IN_ADDR_SIZE, &addr->prefix);
offset += IN_ADDR_SIZE;
/* Prefix length. */
addr->prefixlen = *offset;
offset++;
/* Peer address. */
su.sin.sin_family = AF_INET;
oid2in_addr(offset, IN_ADDR_SIZE, &su.sin.sin_addr);
/* Lookup node. */
dest = bgp_node_lookup(bgp->rib[AFI_IP][SAFI_UNICAST],
(struct prefix *)addr);
if (dest) {
for (path = bgp_dest_get_bgp_path_info(dest); path;
path = path->next)
if (sockunion_same(&path->peer->su, &su))
return path;
bgp_dest_unlock_node(dest);
}
} else {
offset = name + v->namelen;
offsetlen = *length - v->namelen;
len = offsetlen;
if (offsetlen == 0)
dest = bgp_table_top(bgp->rib[AFI_IP][SAFI_UNICAST]);
else {
if (len > IN_ADDR_SIZE)
len = IN_ADDR_SIZE;
oid2in_addr(offset, len, &addr->prefix);
offset += IN_ADDR_SIZE;
offsetlen -= IN_ADDR_SIZE;
if (offsetlen > 0)
addr->prefixlen = *offset;
else
addr->prefixlen = len * 8;
dest = bgp_node_get(bgp->rib[AFI_IP][SAFI_UNICAST],
(struct prefix *)addr);
offset++;
offsetlen--;
}
if (offsetlen > 0) {
len = offsetlen;
if (len > IN_ADDR_SIZE)
len = IN_ADDR_SIZE;
oid2in_addr(offset, len, &paddr);
} else
paddr.s_addr = INADDR_ANY;
if (!dest)
return NULL;
do {
min = NULL;
for (path = bgp_dest_get_bgp_path_info(dest); path;
path = path->next) {
if (path->peer->su.sin.sin_family == AF_INET
&& ntohl(paddr.s_addr)
< ntohl(path->peer->su.sin
.sin_addr
.s_addr)) {
if (min) {
if (ntohl(path->peer->su.sin
.sin_addr
.s_addr)
< ntohl(min->peer->su.sin
.sin_addr
.s_addr))
min = path;
} else
min = path;
}
}
if (min) {
const struct prefix *rn_p =
bgp_dest_get_prefix(dest);
*length =
v->namelen + BGP_PATHATTR_ENTRY_OFFSET;
offset = name + v->namelen;
oid_copy_in_addr(offset, &rn_p->u.prefix4);
offset += IN_ADDR_SIZE;
*offset = rn_p->prefixlen;
offset++;
oid_copy_in_addr(offset,
&min->peer->su.sin.sin_addr);
addr->prefix = rn_p->u.prefix4;
addr->prefixlen = rn_p->prefixlen;
bgp_dest_unlock_node(dest);
return min;
}
paddr.s_addr = INADDR_ANY;
} while ((dest = bgp_route_next(dest)) != NULL);
}
return NULL;
}
static uint8_t *bgp4PathAttrTable(struct variable *v, oid name[],
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
struct bgp_path_info *path;
struct prefix_ipv4 addr;
bgp = bgp_get_default();
if (!bgp)
return NULL;
if (smux_header_table(v, name, length, exact, var_len, write_method)
== MATCH_FAILED)
return NULL;
memset(&addr, 0, sizeof(addr));
path = bgp4PathAttrLookup(v, name, length, bgp, &addr, exact);
if (!path)
return NULL;
switch (v->magic) {
case BGP4PATHATTRPEER: /* 1 */
return SNMP_IPADDRESS(path->peer->su.sin.sin_addr);
case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */
return SNMP_INTEGER(addr.prefixlen);
case BGP4PATHATTRIPADDRPREFIX: /* 3 */
return SNMP_IPADDRESS(addr.prefix);
case BGP4PATHATTRORIGIN: /* 4 */
return SNMP_INTEGER(path->attr->origin);
case BGP4PATHATTRASPATHSEGMENT: /* 5 */
return aspath_snmp_pathseg(path->attr->aspath, var_len);
case BGP4PATHATTRNEXTHOP: /* 6 */
return SNMP_IPADDRESS(path->attr->nexthop);
case BGP4PATHATTRMULTIEXITDISC: /* 7 */
return SNMP_INTEGER(path->attr->med);
case BGP4PATHATTRLOCALPREF: /* 8 */
return SNMP_INTEGER(path->attr->local_pref);
case BGP4PATHATTRATOMICAGGREGATE: /* 9 */
return SNMP_INTEGER(1);
case BGP4PATHATTRAGGREGATORAS: /* 10 */
return SNMP_INTEGER(path->attr->aggregator_as);
case BGP4PATHATTRAGGREGATORADDR: /* 11 */
return SNMP_IPADDRESS(path->attr->aggregator_addr);
case BGP4PATHATTRCALCLOCALPREF: /* 12 */
return SNMP_INTEGER(-1);
case BGP4PATHATTRBEST: /* 13 */
#define BGP4_PathAttrBest_false 1
#define BGP4_PathAttrBest_true 2
if (CHECK_FLAG(path->flags, BGP_PATH_SELECTED))
return SNMP_INTEGER(BGP4_PathAttrBest_true);
else
return SNMP_INTEGER(BGP4_PathAttrBest_false);
case BGP4PATHATTRUNKNOWN: /* 14 */
*var_len = 0;
return NULL;
}
return NULL;
}
/* BGP Traps. */
static struct trap_object bgpTrapList[] = {{3, {3, 1, BGPPEERREMOTEADDR} },
{3, {3, 1, BGPPEERLASTERROR} },
{3, {3, 1, BGPPEERSTATE} } };
static int bgpTrapEstablished(struct peer *peer)
{
int ret;
struct in_addr addr;
oid index[sizeof(oid) * IN_ADDR_SIZE];
/* Check if this peer just went to Established */
if ((peer->ostatus != OpenConfirm) || !(peer_established(peer)))
return 0;
ret = inet_aton(peer->host, &addr);
if (ret == 0)
return 0;
oid_copy_in_addr(index, &addr);
smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
array_size(bgp_trap_oid), bgp_oid,
sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
bgpTrapList, array_size(bgpTrapList), BGPESTABLISHED);
return 0;
}
static int bgpTrapBackwardTransition(struct peer *peer)
{
int ret;
struct in_addr addr;
oid index[sizeof(oid) * IN_ADDR_SIZE];
ret = inet_aton(peer->host, &addr);
if (ret == 0)
return 0;
oid_copy_in_addr(index, &addr);
smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
array_size(bgp_trap_oid), bgp_oid,
sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
bgpTrapList, array_size(bgpTrapList), BGPBACKWARDTRANSITION);
return 0;
}
static int bgp_snmp_init(struct thread_master *tm)
{
smux_init(tm);
REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid);
bgp_snmp_bgp4_init(tm);
bgp_snmp_bgp4v2_init(tm);
bgp_mpls_l3vpn_module_init();
return 0;
}

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/* Common header file for BGP SNMP implementation.
*
* Copyright (C) 2022 Donatas Abraitis <donatas@opensourcerouting.org>
*
* This file is part of FRRouting (FRR).
*
* FRR is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* FRR is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _FRR_BGP_SNMP_H_
#define _FRR_BGP_SNMP_H_
/* SNMP value hack. */
#define INTEGER ASN_INTEGER
#define INTEGER32 ASN_INTEGER
#define COUNTER32 ASN_COUNTER
#define OCTET_STRING ASN_OCTET_STR
#define IPADDRESS ASN_IPADDRESS
#define GAUGE32 ASN_UNSIGNED
#endif /* _FRR_BGP_SNMP_H_ */

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/* BGP4 SNMP support
* Copyright (C) 1999, 2000 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include "if.h"
#include "log.h"
#include "prefix.h"
#include "command.h"
#include "thread.h"
#include "smux.h"
#include "filter.h"
#include "hook.h"
#include "libfrr.h"
#include "lib/version.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_snmp.h"
#include "bgpd/bgp_snmp_bgp4.h"
#include "bgpd/bgp_mplsvpn_snmp.h"
/* Declare static local variables for convenience. */
SNMP_LOCAL_VARIABLES
/* BGP-MIB instances. */
static oid bgp_oid[] = {BGP4MIB};
static oid bgp_trap_oid[] = {BGP4MIB, 0};
/* IP address 0.0.0.0. */
static struct in_addr bgp_empty_addr = {.s_addr = 0};
static uint8_t *bgpVersion(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
static uint8_t version;
if (smux_header_generic(v, name, length, exact, var_len,
write_method) == MATCH_FAILED)
return NULL;
/* Return BGP version. Zebra bgpd only support version 4. */
version = (0x80 >> (BGP_VERSION_4 - 1));
/* Return octet string length 1. */
*var_len = 1;
return &version;
}
static uint8_t *bgpLocalAs(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
if (smux_header_generic(v, name, length, exact, var_len,
write_method) == MATCH_FAILED)
return NULL;
/* Get BGP structure. */
bgp = bgp_get_default();
if (!bgp)
return NULL;
return SNMP_INTEGER(bgp->as);
}
static struct peer *peer_lookup_addr_ipv4(struct in_addr *src)
{
struct bgp *bgp;
struct peer *peer;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (sockunion_family(&peer->su) != AF_INET)
continue;
if (sockunion2ip(&peer->su) == src->s_addr)
return peer;
}
}
return NULL;
}
static struct peer *bgp_peer_lookup_next(struct in_addr *src)
{
struct bgp *bgp;
struct peer *peer;
struct peer *next_peer = NULL;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (sockunion_family(&peer->su) != AF_INET)
continue;
if (ntohl(sockunion2ip(&peer->su)) <=
ntohl(src->s_addr))
continue;
if (!next_peer ||
ntohl(sockunion2ip(&next_peer->su)) >
ntohl(sockunion2ip(&peer->su))) {
next_peer = peer;
}
}
}
if (next_peer) {
src->s_addr = sockunion2ip(&next_peer->su);
return next_peer;
}
return NULL;
}
/* 1.3.6.1.2.1.15.3.1.x = 10 */
#define PEERTAB_NAMELEN 10
static struct peer *bgpPeerTable_lookup(struct variable *v, oid name[],
size_t *length, struct in_addr *addr,
int exact)
{
struct peer *peer = NULL;
size_t namelen = v ? v->namelen : PEERTAB_NAMELEN;
int len;
if (exact) {
/* Check the length. */
if (*length - namelen != sizeof(struct in_addr))
return NULL;
oid2in_addr(name + namelen, IN_ADDR_SIZE, addr);
peer = peer_lookup_addr_ipv4(addr);
return peer;
} else {
len = *length - namelen;
if (len > 4)
len = 4;
oid2in_addr(name + namelen, len, addr);
peer = bgp_peer_lookup_next(addr);
if (peer == NULL)
return NULL;
oid_copy_in_addr(name + namelen, addr);
*length = sizeof(struct in_addr) + namelen;
return peer;
}
return NULL;
}
/* BGP write methods. */
static int write_bgpPeerTable(int action, uint8_t *var_val,
uint8_t var_val_type, size_t var_val_len,
uint8_t *statP, oid *name, size_t length)
{
struct in_addr addr;
struct peer *peer;
long intval;
if (var_val_type != ASN_INTEGER) {
return SNMP_ERR_WRONGTYPE;
}
if (var_val_len != sizeof(long)) {
return SNMP_ERR_WRONGLENGTH;
}
intval = *(long *)var_val;
memset(&addr, 0, sizeof(addr));
peer = bgpPeerTable_lookup(NULL, name, &length, &addr, 1);
if (!peer)
return SNMP_ERR_NOSUCHNAME;
if (action != SNMP_MSG_INTERNAL_SET_COMMIT)
return SNMP_ERR_NOERROR;
zlog_info("%s: SNMP write .%ld = %ld", peer->host,
(long)name[PEERTAB_NAMELEN - 1], intval);
switch (name[PEERTAB_NAMELEN - 1]) {
case BGPPEERADMINSTATUS:
#define BGP_PeerAdmin_stop 1
#define BGP_PeerAdmin_start 2
/* When the peer is established, */
if (intval == BGP_PeerAdmin_stop)
BGP_EVENT_ADD(peer, BGP_Stop);
else if (intval == BGP_PeerAdmin_start)
; /* Do nothing. */
else
return SNMP_ERR_NOSUCHNAME;
break;
case BGPPEERCONNECTRETRYINTERVAL:
peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
peer->connect = intval;
peer->v_connect = intval;
break;
case BGPPEERHOLDTIMECONFIGURED:
peer_flag_set(peer, PEER_FLAG_TIMER);
peer->holdtime = intval;
peer->v_holdtime = intval;
break;
case BGPPEERKEEPALIVECONFIGURED:
peer_flag_set(peer, PEER_FLAG_TIMER);
peer->keepalive = intval;
peer->v_keepalive = intval;
break;
case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
peer->v_routeadv = intval;
break;
}
return SNMP_ERR_NOERROR;
}
static uint8_t *bgpPeerTable(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
static struct in_addr addr;
struct peer *peer;
uint32_t ui, uo;
if (smux_header_table(v, name, length, exact, var_len, write_method) ==
MATCH_FAILED)
return NULL;
memset(&addr, 0, sizeof(addr));
peer = bgpPeerTable_lookup(v, name, length, &addr, exact);
if (!peer)
return NULL;
switch (v->magic) {
case BGPPEERIDENTIFIER:
return SNMP_IPADDRESS(peer->remote_id);
case BGPPEERSTATE:
return SNMP_INTEGER(peer->status);
case BGPPEERADMINSTATUS:
*write_method = write_bgpPeerTable;
#define BGP_PeerAdmin_stop 1
#define BGP_PeerAdmin_start 2
if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN))
return SNMP_INTEGER(BGP_PeerAdmin_stop);
else
return SNMP_INTEGER(BGP_PeerAdmin_start);
case BGPPEERNEGOTIATEDVERSION:
return SNMP_INTEGER(BGP_VERSION_4);
case BGPPEERLOCALADDR:
if (peer->su_local)
return SNMP_IPADDRESS(peer->su_local->sin.sin_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGPPEERLOCALPORT:
if (peer->su_local)
return SNMP_INTEGER(
ntohs(peer->su_local->sin.sin_port));
else
return SNMP_INTEGER(0);
case BGPPEERREMOTEADDR:
if (peer->su_remote)
return SNMP_IPADDRESS(peer->su_remote->sin.sin_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGPPEERREMOTEPORT:
if (peer->su_remote)
return SNMP_INTEGER(
ntohs(peer->su_remote->sin.sin_port));
else
return SNMP_INTEGER(0);
case BGPPEERREMOTEAS:
return SNMP_INTEGER(peer->as);
case BGPPEERINUPDATES:
ui = atomic_load_explicit(&peer->update_in,
memory_order_relaxed);
return SNMP_INTEGER(ui);
case BGPPEEROUTUPDATES:
uo = atomic_load_explicit(&peer->update_out,
memory_order_relaxed);
return SNMP_INTEGER(uo);
case BGPPEERINTOTALMESSAGES:
return SNMP_INTEGER(PEER_TOTAL_RX(peer));
case BGPPEEROUTTOTALMESSAGES:
return SNMP_INTEGER(PEER_TOTAL_TX(peer));
case BGPPEERLASTERROR: {
static uint8_t lasterror[2];
lasterror[0] = peer->notify.code;
lasterror[1] = peer->notify.subcode;
*var_len = 2;
return (uint8_t *)&lasterror;
}
case BGPPEERFSMESTABLISHEDTRANSITIONS:
return SNMP_INTEGER(peer->established);
case BGPPEERFSMESTABLISHEDTIME:
if (peer->uptime == 0)
return SNMP_INTEGER(0);
else
return SNMP_INTEGER(monotime(NULL) - peer->uptime);
case BGPPEERCONNECTRETRYINTERVAL:
*write_method = write_bgpPeerTable;
return SNMP_INTEGER(peer->v_connect);
case BGPPEERHOLDTIME:
return SNMP_INTEGER(peer->v_holdtime);
case BGPPEERKEEPALIVE:
return SNMP_INTEGER(peer->v_keepalive);
case BGPPEERHOLDTIMECONFIGURED:
*write_method = write_bgpPeerTable;
if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
return SNMP_INTEGER(peer->holdtime);
else
return SNMP_INTEGER(peer->v_holdtime);
case BGPPEERKEEPALIVECONFIGURED:
*write_method = write_bgpPeerTable;
if (CHECK_FLAG(peer->flags, PEER_FLAG_TIMER))
return SNMP_INTEGER(peer->keepalive);
else
return SNMP_INTEGER(peer->v_keepalive);
case BGPPEERMINROUTEADVERTISEMENTINTERVAL:
*write_method = write_bgpPeerTable;
return SNMP_INTEGER(peer->v_routeadv);
case BGPPEERINUPDATEELAPSEDTIME:
if (peer->update_time == 0)
return SNMP_INTEGER(0);
else
return SNMP_INTEGER(monotime(NULL) - peer->update_time);
default:
return NULL;
}
return NULL;
}
static uint8_t *bgpIdentifier(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
if (smux_header_generic(v, name, length, exact, var_len,
write_method) == MATCH_FAILED)
return NULL;
bgp = bgp_get_default();
if (!bgp)
return NULL;
return SNMP_IPADDRESS(bgp->router_id);
}
static uint8_t *bgpRcvdPathAttrTable(struct variable *v, oid name[],
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
/* Received Path Attribute Table. This table contains, one entry
per path to a network, path attributes received from all peers
running BGP version 3 or less. This table is obsolete, having
been replaced in functionality with the bgp4PathAttrTable. */
return NULL;
}
static struct bgp_path_info *bgp4PathAttrLookup(struct variable *v, oid name[],
size_t *length, struct bgp *bgp,
struct prefix_ipv4 *addr,
int exact)
{
oid *offset;
int offsetlen;
struct bgp_path_info *path;
struct bgp_path_info *min;
struct bgp_dest *dest;
union sockunion su;
unsigned int len;
struct in_addr paddr;
sockunion_init(&su);
#define BGP_PATHATTR_ENTRY_OFFSET (IN_ADDR_SIZE + 1 + IN_ADDR_SIZE)
if (exact) {
if (*length - v->namelen != BGP_PATHATTR_ENTRY_OFFSET)
return NULL;
/* Set OID offset for prefix. */
offset = name + v->namelen;
oid2in_addr(offset, IN_ADDR_SIZE, &addr->prefix);
offset += IN_ADDR_SIZE;
/* Prefix length. */
addr->prefixlen = *offset;
offset++;
/* Peer address. */
su.sin.sin_family = AF_INET;
oid2in_addr(offset, IN_ADDR_SIZE, &su.sin.sin_addr);
/* Lookup node. */
dest = bgp_node_lookup(bgp->rib[AFI_IP][SAFI_UNICAST],
(struct prefix *)addr);
if (dest) {
for (path = bgp_dest_get_bgp_path_info(dest); path;
path = path->next)
if (sockunion_same(&path->peer->su, &su))
return path;
bgp_dest_unlock_node(dest);
}
} else {
offset = name + v->namelen;
offsetlen = *length - v->namelen;
len = offsetlen;
if (offsetlen == 0)
dest = bgp_table_top(bgp->rib[AFI_IP][SAFI_UNICAST]);
else {
if (len > IN_ADDR_SIZE)
len = IN_ADDR_SIZE;
oid2in_addr(offset, len, &addr->prefix);
offset += IN_ADDR_SIZE;
offsetlen -= IN_ADDR_SIZE;
if (offsetlen > 0)
addr->prefixlen = *offset;
else
addr->prefixlen = len * 8;
dest = bgp_node_get(bgp->rib[AFI_IP][SAFI_UNICAST],
(struct prefix *)addr);
offset++;
offsetlen--;
}
if (offsetlen > 0) {
len = offsetlen;
if (len > IN_ADDR_SIZE)
len = IN_ADDR_SIZE;
oid2in_addr(offset, len, &paddr);
} else
paddr.s_addr = INADDR_ANY;
if (!dest)
return NULL;
do {
min = NULL;
for (path = bgp_dest_get_bgp_path_info(dest); path;
path = path->next) {
if (path->peer->su.sin.sin_family == AF_INET &&
ntohl(paddr.s_addr) <
ntohl(path->peer->su.sin.sin_addr
.s_addr)) {
if (min) {
if (ntohl(path->peer->su.sin
.sin_addr
.s_addr) <
ntohl(min->peer->su.sin
.sin_addr
.s_addr))
min = path;
} else
min = path;
}
}
if (min) {
const struct prefix *rn_p =
bgp_dest_get_prefix(dest);
*length =
v->namelen + BGP_PATHATTR_ENTRY_OFFSET;
offset = name + v->namelen;
oid_copy_in_addr(offset, &rn_p->u.prefix4);
offset += IN_ADDR_SIZE;
*offset = rn_p->prefixlen;
offset++;
oid_copy_in_addr(offset,
&min->peer->su.sin.sin_addr);
addr->prefix = rn_p->u.prefix4;
addr->prefixlen = rn_p->prefixlen;
bgp_dest_unlock_node(dest);
return min;
}
paddr.s_addr = INADDR_ANY;
} while ((dest = bgp_route_next(dest)) != NULL);
}
return NULL;
}
static uint8_t *bgp4PathAttrTable(struct variable *v, oid name[],
size_t *length, int exact, size_t *var_len,
WriteMethod **write_method)
{
struct bgp *bgp;
struct bgp_path_info *path;
struct prefix_ipv4 addr;
bgp = bgp_get_default();
if (!bgp)
return NULL;
if (smux_header_table(v, name, length, exact, var_len, write_method) ==
MATCH_FAILED)
return NULL;
memset(&addr, 0, sizeof(addr));
path = bgp4PathAttrLookup(v, name, length, bgp, &addr, exact);
if (!path)
return NULL;
switch (v->magic) {
case BGP4PATHATTRPEER: /* 1 */
return SNMP_IPADDRESS(path->peer->su.sin.sin_addr);
case BGP4PATHATTRIPADDRPREFIXLEN: /* 2 */
return SNMP_INTEGER(addr.prefixlen);
case BGP4PATHATTRIPADDRPREFIX: /* 3 */
return SNMP_IPADDRESS(addr.prefix);
case BGP4PATHATTRORIGIN: /* 4 */
return SNMP_INTEGER(path->attr->origin);
case BGP4PATHATTRASPATHSEGMENT: /* 5 */
return aspath_snmp_pathseg(path->attr->aspath, var_len);
case BGP4PATHATTRNEXTHOP: /* 6 */
return SNMP_IPADDRESS(path->attr->nexthop);
case BGP4PATHATTRMULTIEXITDISC: /* 7 */
return SNMP_INTEGER(path->attr->med);
case BGP4PATHATTRLOCALPREF: /* 8 */
return SNMP_INTEGER(path->attr->local_pref);
case BGP4PATHATTRATOMICAGGREGATE: /* 9 */
return SNMP_INTEGER(1);
case BGP4PATHATTRAGGREGATORAS: /* 10 */
return SNMP_INTEGER(path->attr->aggregator_as);
case BGP4PATHATTRAGGREGATORADDR: /* 11 */
return SNMP_IPADDRESS(path->attr->aggregator_addr);
case BGP4PATHATTRCALCLOCALPREF: /* 12 */
return SNMP_INTEGER(-1);
case BGP4PATHATTRBEST: /* 13 */
#define BGP4_PathAttrBest_false 1
#define BGP4_PathAttrBest_true 2
if (CHECK_FLAG(path->flags, BGP_PATH_SELECTED))
return SNMP_INTEGER(BGP4_PathAttrBest_true);
else
return SNMP_INTEGER(BGP4_PathAttrBest_false);
case BGP4PATHATTRUNKNOWN: /* 14 */
*var_len = 0;
return NULL;
}
return NULL;
}
/* BGP Traps. */
static struct trap_object bgpTrapList[] = {{3, {3, 1, BGPPEERREMOTEADDR}},
{3, {3, 1, BGPPEERLASTERROR}},
{3, {3, 1, BGPPEERSTATE}}};
static struct variable bgp_variables[] = {
/* BGP version. */
{BGPVERSION, OCTET_STRING, RONLY, bgpVersion, 1, {1}},
/* BGP local AS. */
{BGPLOCALAS, INTEGER, RONLY, bgpLocalAs, 1, {2}},
/* BGP peer table. */
{BGPPEERIDENTIFIER, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 1}},
{BGPPEERSTATE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 2}},
{BGPPEERADMINSTATUS, INTEGER, RWRITE, bgpPeerTable, 3, {3, 1, 3}},
{BGPPEERNEGOTIATEDVERSION,
INTEGER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 4}},
{BGPPEERLOCALADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 5}},
{BGPPEERLOCALPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 6}},
{BGPPEERREMOTEADDR, IPADDRESS, RONLY, bgpPeerTable, 3, {3, 1, 7}},
{BGPPEERREMOTEPORT, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 8}},
{BGPPEERREMOTEAS, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 9}},
{BGPPEERINUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 10}},
{BGPPEEROUTUPDATES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 11}},
{BGPPEERINTOTALMESSAGES, COUNTER32, RONLY, bgpPeerTable, 3, {3, 1, 12}},
{BGPPEEROUTTOTALMESSAGES,
COUNTER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 13}},
{BGPPEERLASTERROR, OCTET_STRING, RONLY, bgpPeerTable, 3, {3, 1, 14}},
{BGPPEERFSMESTABLISHEDTRANSITIONS,
COUNTER32,
RONLY,
bgpPeerTable,
3,
{3, 1, 15}},
{BGPPEERFSMESTABLISHEDTIME,
GAUGE32,
RONLY,
bgpPeerTable,
3,
{3, 1, 16}},
{BGPPEERCONNECTRETRYINTERVAL,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 17}},
{BGPPEERHOLDTIME, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 18}},
{BGPPEERKEEPALIVE, INTEGER, RONLY, bgpPeerTable, 3, {3, 1, 19}},
{BGPPEERHOLDTIMECONFIGURED,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 20}},
{BGPPEERKEEPALIVECONFIGURED,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 21}},
{BGPPEERMINROUTEADVERTISEMENTINTERVAL,
INTEGER,
RWRITE,
bgpPeerTable,
3,
{3, 1, 23}},
{BGPPEERINUPDATEELAPSEDTIME,
GAUGE32,
RONLY,
bgpPeerTable,
3,
{3, 1, 24}},
/* BGP identifier. */
{BGPIDENTIFIER, IPADDRESS, RONLY, bgpIdentifier, 1, {4}},
/* BGP received path attribute table. */
{BGPPATHATTRPEER, IPADDRESS, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 1}},
{BGPPATHATTRDESTNETWORK,
IPADDRESS,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 2}},
{BGPPATHATTRORIGIN, INTEGER, RONLY, bgpRcvdPathAttrTable, 3, {5, 1, 3}},
{BGPPATHATTRASPATH,
OCTET_STRING,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 4}},
{BGPPATHATTRNEXTHOP,
IPADDRESS,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 5}},
{BGPPATHATTRINTERASMETRIC,
INTEGER32,
RONLY,
bgpRcvdPathAttrTable,
3,
{5, 1, 6}},
/* BGP-4 received path attribute table. */
{BGP4PATHATTRPEER, IPADDRESS, RONLY, bgp4PathAttrTable, 3, {6, 1, 1}},
{BGP4PATHATTRIPADDRPREFIXLEN,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 2}},
{BGP4PATHATTRIPADDRPREFIX,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 3}},
{BGP4PATHATTRORIGIN, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 4}},
{BGP4PATHATTRASPATHSEGMENT,
OCTET_STRING,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 5}},
{BGP4PATHATTRNEXTHOP,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 6}},
{BGP4PATHATTRMULTIEXITDISC,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 7}},
{BGP4PATHATTRLOCALPREF,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 8}},
{BGP4PATHATTRATOMICAGGREGATE,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 9}},
{BGP4PATHATTRAGGREGATORAS,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 10}},
{BGP4PATHATTRAGGREGATORADDR,
IPADDRESS,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 11}},
{BGP4PATHATTRCALCLOCALPREF,
INTEGER,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 12}},
{BGP4PATHATTRBEST, INTEGER, RONLY, bgp4PathAttrTable, 3, {6, 1, 13}},
{BGP4PATHATTRUNKNOWN,
OCTET_STRING,
RONLY,
bgp4PathAttrTable,
3,
{6, 1, 14}},
};
int bgpTrapEstablished(struct peer *peer)
{
int ret;
struct in_addr addr;
oid index[sizeof(oid) * IN_ADDR_SIZE];
/* Check if this peer just went to Established */
if ((peer->ostatus != OpenConfirm) || !(peer_established(peer)))
return 0;
ret = inet_aton(peer->host, &addr);
if (ret == 0)
return 0;
oid_copy_in_addr(index, &addr);
smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
array_size(bgp_trap_oid), bgp_oid,
sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
bgpTrapList, array_size(bgpTrapList), BGPESTABLISHED);
return 0;
}
int bgpTrapBackwardTransition(struct peer *peer)
{
int ret;
struct in_addr addr;
oid index[sizeof(oid) * IN_ADDR_SIZE];
ret = inet_aton(peer->host, &addr);
if (ret == 0)
return 0;
oid_copy_in_addr(index, &addr);
smux_trap(bgp_variables, array_size(bgp_variables), bgp_trap_oid,
array_size(bgp_trap_oid), bgp_oid,
sizeof(bgp_oid) / sizeof(oid), index, IN_ADDR_SIZE,
bgpTrapList, array_size(bgpTrapList), BGPBACKWARDTRANSITION);
return 0;
}
int bgp_snmp_bgp4_init(struct thread_master *tm)
{
REGISTER_MIB("mibII/bgp", bgp_variables, variable, bgp_oid);
return 0;
}

90
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/* BGP4-MIB SNMP support
*
* Using: http://www.circitor.fr/Mibs/Html/B/BGP4-MIB.php
*
* Copyright (C) 2022 Donatas Abraitis <donatas@opensourcerouting.org>
*
* This file is part of FRRouting (FRR).
*
* FRR is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* FRR is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _FRR_BGP_SNMP_BGP4_H_
#define _FRR_BGP_SNMP_BGP4_H_
#define BGPVERSION 0
#define BGPLOCALAS 0
#define BGPIDENTIFIER 0
/* bgp */
#define BGP4MIB 1, 3, 6, 1, 2, 1, 15
/* bgpTraps */
#define BGPESTABLISHED 1
#define BGPBACKWARDTRANSITION 2
/* bgpPeerTable */
#define BGPPEERIDENTIFIER 1
#define BGPPEERSTATE 2
#define BGPPEERADMINSTATUS 3
#define BGPPEERNEGOTIATEDVERSION 4
#define BGPPEERLOCALADDR 5
#define BGPPEERLOCALPORT 6
#define BGPPEERREMOTEADDR 7
#define BGPPEERREMOTEPORT 8
#define BGPPEERREMOTEAS 9
#define BGPPEERINUPDATES 10
#define BGPPEEROUTUPDATES 11
#define BGPPEERINTOTALMESSAGES 12
#define BGPPEEROUTTOTALMESSAGES 13
#define BGPPEERLASTERROR 14
#define BGPPEERFSMESTABLISHEDTRANSITIONS 15
#define BGPPEERFSMESTABLISHEDTIME 16
#define BGPPEERCONNECTRETRYINTERVAL 17
#define BGPPEERHOLDTIME 18
#define BGPPEERKEEPALIVE 19
#define BGPPEERHOLDTIMECONFIGURED 20
#define BGPPEERKEEPALIVECONFIGURED 21
#define BGPPEERMINROUTEADVERTISEMENTINTERVAL 22
#define BGPPEERINUPDATEELAPSEDTIME 23
/* bgpPathAttrEntry */
#define BGPPATHATTRPEER 1
#define BGPPATHATTRDESTNETWORK 2
#define BGPPATHATTRORIGIN 3
#define BGPPATHATTRASPATH 4
#define BGPPATHATTRNEXTHOP 5
#define BGPPATHATTRINTERASMETRIC 6
/* bgp4PathAttrEntry */
#define BGP4PATHATTRPEER 1
#define BGP4PATHATTRIPADDRPREFIXLEN 2
#define BGP4PATHATTRIPADDRPREFIX 3
#define BGP4PATHATTRORIGIN 4
#define BGP4PATHATTRASPATHSEGMENT 5
#define BGP4PATHATTRNEXTHOP 6
#define BGP4PATHATTRMULTIEXITDISC 7
#define BGP4PATHATTRLOCALPREF 8
#define BGP4PATHATTRATOMICAGGREGATE 9
#define BGP4PATHATTRAGGREGATORAS 10
#define BGP4PATHATTRAGGREGATORADDR 11
#define BGP4PATHATTRCALCLOCALPREF 12
#define BGP4PATHATTRBEST 13
#define BGP4PATHATTRUNKNOWN 14
extern int bgpTrapEstablished(struct peer *peer);
extern int bgpTrapBackwardTransition(struct peer *peer);
extern int bgp_snmp_bgp4_init(struct thread_master *tm);
#endif /* _FRR_BGP_SNMP_BGP4_H_ */

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/* BGP4V2-MIB SNMP support
*
* Copyright (C) 2022 Donatas Abraitis <donatas@opensourcerouting.org>
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include "if.h"
#include "log.h"
#include "prefix.h"
#include "command.h"
#include "thread.h"
#include "smux.h"
#include "filter.h"
#include "hook.h"
#include "libfrr.h"
#include "lib/version.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_snmp.h"
#include "bgpd/bgp_snmp_bgp4v2.h"
SNMP_LOCAL_VARIABLES
static oid bgpv2_oid[] = {BGP4V2MIB};
static struct in_addr bgp_empty_addr = {};
static struct peer *peer_lookup_all_vrf(struct ipaddr *addr)
{
struct bgp *bgp;
struct peer *peer;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
switch (sockunion_family(&peer->su)) {
case AF_INET:
if (IPV4_ADDR_SAME(&peer->su.sin.sin_addr,
&addr->ip._v4_addr))
return peer;
break;
case AF_INET6:
if (IPV6_ADDR_SAME(&peer->su.sin6.sin6_addr,
&addr->ip._v6_addr))
return peer;
break;
default:
break;
}
}
}
return NULL;
}
static struct peer *peer_lookup_all_vrf_next(struct ipaddr *addr, oid *offset,
sa_family_t family)
{
struct bgp *bgp;
struct peer *peer;
struct peer *next_peer = NULL;
struct listnode *node;
struct listnode *bgpnode;
for (ALL_LIST_ELEMENTS_RO(bm->bgp, bgpnode, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
sa_family_t peer_family = sockunion_family(&peer->su);
if (peer_family != family)
continue;
switch (sockunion_family(&peer->su)) {
case AF_INET:
oid2in_addr(offset, IN_ADDR_SIZE,
&addr->ip._v4_addr);
if (IPV4_ADDR_CMP(&peer->su.sin.sin_addr,
&addr->ip._v4_addr) < 0 ||
IPV4_ADDR_SAME(&peer->su.sin.sin_addr,
&addr->ip._v4_addr))
continue;
if (!next_peer ||
IPV4_ADDR_CMP(&next_peer->su.sin.sin_addr,
&peer->su.sin.sin_addr) > 0)
next_peer = peer;
break;
case AF_INET6:
oid2in6_addr(offset, &addr->ip._v6_addr);
if (IPV6_ADDR_CMP(&peer->su.sin6.sin6_addr,
&addr->ip._v6_addr) < 0 ||
IPV6_ADDR_SAME(&peer->su.sin6.sin6_addr,
&addr->ip._v6_addr))
continue;
if (!next_peer ||
IPV6_ADDR_CMP(&next_peer->su.sin6.sin6_addr,
&peer->su.sin6.sin6_addr) > 0)
next_peer = peer;
break;
default:
break;
}
}
}
if (next_peer)
return next_peer;
return NULL;
}
static struct peer *bgpv2PeerTable_lookup(struct variable *v, oid name[],
size_t *length, int exact,
struct ipaddr *addr)
{
struct peer *peer = NULL;
size_t namelen = v ? v->namelen : BGP4V2_PEER_ENTRY_OFFSET;
oid *offset = name + namelen;
sa_family_t family = name[namelen - 1] == 4 ? AF_INET : AF_INET6;
if (exact) {
if (family == AF_INET) {
oid2in_addr(offset, IN_ADDR_SIZE, &addr->ip._v4_addr);
peer = peer_lookup_all_vrf(addr);
return peer;
} else if (family == AF_INET6) {
oid2in6_addr(offset, &addr->ip._v6_addr);
return peer_lookup_all_vrf(addr);
}
} else {
peer = peer_lookup_all_vrf_next(addr, offset, family);
if (peer == NULL)
return NULL;
switch (sockunion_family(&peer->su)) {
case AF_INET:
oid_copy_in_addr(offset, &peer->su.sin.sin_addr);
*length = IN_ADDR_SIZE + namelen;
return peer;
case AF_INET6:
oid_copy_in6_addr(offset, &peer->su.sin6.sin6_addr);
*length = IN6_ADDR_SIZE + namelen;
return peer;
default:
break;
}
}
return NULL;
}
static uint8_t *bgpv2PeerTable(struct variable *v, oid name[], size_t *length,
int exact, size_t *var_len,
WriteMethod **write_method)
{
struct peer *peer;
struct ipaddr addr = {};
if (smux_header_table(v, name, length, exact, var_len, write_method) ==
MATCH_FAILED)
return NULL;
peer = bgpv2PeerTable_lookup(v, name, length, exact, &addr);
if (!peer)
return NULL;
switch (v->magic) {
case BGP4V2_PEER_INSTANCE:
return SNMP_INTEGER(peer->bgp->vrf_id);
case BGP4V2_PEER_LOCAL_ADDR_TYPE:
if (peer->su_local)
return SNMP_INTEGER(peer->su_local->sa.sa_family ==
AF_INET
? AFI_IP
: AFI_IP6);
else
return SNMP_INTEGER(0);
case BGP4V2_PEER_LOCAL_ADDR:
if (peer->su_local)
if (peer->su_local->sa.sa_family == AF_INET)
return SNMP_IPADDRESS(
peer->su_local->sin.sin_addr);
else
return SNMP_IP6ADDRESS(
peer->su_local->sin6.sin6_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGP4V2_PEER_REMOTE_ADDR_TYPE:
if (peer->su_remote)
return SNMP_INTEGER(peer->su_remote->sa.sa_family ==
AF_INET
? AFI_IP
: AFI_IP6);
else
return SNMP_INTEGER(0);
case BGP4V2_PEER_REMOTE_ADDR:
if (peer->su_remote)
if (peer->su_remote->sa.sa_family == AF_INET)
return SNMP_IPADDRESS(
peer->su_remote->sin.sin_addr);
else
return SNMP_IP6ADDRESS(
peer->su_remote->sin6.sin6_addr);
else
return SNMP_IPADDRESS(bgp_empty_addr);
case BGP4V2_PEER_LOCAL_PORT:
if (peer->su_local)
if (peer->su_local->sa.sa_family == AF_INET)
return SNMP_INTEGER(
ntohs(peer->su_local->sin.sin_port));
else
return SNMP_INTEGER(
ntohs(peer->su_local->sin6.sin6_port));
else
return SNMP_INTEGER(0);
case BGP4V2_PEER_LOCAL_AS:
return SNMP_INTEGER(peer->local_as);
case BGP4V2_PEER_LOCAL_IDENTIFIER:
return SNMP_IPADDRESS(peer->local_id);
case BGP4V2_PEER_REMOTE_PORT:
if (peer->su_remote)
if (peer->su_remote->sa.sa_family == AF_INET)
return SNMP_INTEGER(
ntohs(peer->su_remote->sin.sin_port));
else
return SNMP_INTEGER(
ntohs(peer->su_remote->sin6.sin6_port));
else
return SNMP_INTEGER(0);
case BGP4V2_PEER_REMOTE_AS:
return SNMP_INTEGER(peer->as);
case BGP4V2_PEER_REMOTE_IDENTIFIER:
return SNMP_IPADDRESS(peer->remote_id);
case BGP4V2_PEER_ADMIN_STATUS:
#define BGP_PEER_ADMIN_STATUS_HALTED 1
#define BGP_PEER_ADMIN_STATUS_RUNNING 2
if (BGP_PEER_START_SUPPRESSED(peer))
return SNMP_INTEGER(BGP_PEER_ADMIN_STATUS_HALTED);
else
return SNMP_INTEGER(BGP_PEER_ADMIN_STATUS_RUNNING);
case BGP4V2_PEER_STATE:
return SNMP_INTEGER(peer->status);
case BGP4V2_PEER_DESCRIPTION:
if (peer->desc)
return SNMP_STRING(peer->desc);
default:
break;
}
return NULL;
}
static struct variable bgpv2_variables[] = {
{BGP4V2_PEER_INSTANCE,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_INSTANCE, 1, 4}},
{BGP4V2_PEER_INSTANCE,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_INSTANCE, 2, 16}},
{BGP4V2_PEER_LOCAL_ADDR_TYPE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_ADDR_TYPE, 1, 4}},
{BGP4V2_PEER_LOCAL_ADDR_TYPE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_ADDR_TYPE, 2, 16}},
{BGP4V2_PEER_LOCAL_ADDR,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_ADDR, 1, 4}},
{BGP4V2_PEER_LOCAL_ADDR,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_ADDR, 2, 16}},
{BGP4V2_PEER_REMOTE_ADDR_TYPE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_ADDR_TYPE, 1, 4}},
{BGP4V2_PEER_REMOTE_ADDR_TYPE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_ADDR_TYPE, 2, 16}},
{BGP4V2_PEER_REMOTE_ADDR,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_ADDR, 1, 4}},
{BGP4V2_PEER_REMOTE_ADDR,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_ADDR, 2, 16}},
{BGP4V2_PEER_LOCAL_PORT,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_PORT, 1, 4}},
{BGP4V2_PEER_LOCAL_PORT,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_PORT, 2, 16}},
{BGP4V2_PEER_LOCAL_AS,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_AS, 1, 4}},
{BGP4V2_PEER_LOCAL_AS,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_AS, 2, 16}},
{BGP4V2_PEER_LOCAL_IDENTIFIER,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_IDENTIFIER, 1, 4}},
{BGP4V2_PEER_LOCAL_IDENTIFIER,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_LOCAL_IDENTIFIER, 2, 16}},
{BGP4V2_PEER_REMOTE_PORT,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_PORT, 1, 4}},
{BGP4V2_PEER_REMOTE_PORT,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_PORT, 2, 16}},
{BGP4V2_PEER_REMOTE_AS,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_AS, 1, 4}},
{BGP4V2_PEER_REMOTE_AS,
ASN_UNSIGNED,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_AS, 2, 16}},
{BGP4V2_PEER_REMOTE_IDENTIFIER,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_IDENTIFIER, 1, 4}},
{BGP4V2_PEER_REMOTE_IDENTIFIER,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_REMOTE_IDENTIFIER, 2, 16}},
{BGP4V2_PEER_ADMIN_STATUS,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_ADMIN_STATUS, 1, 4}},
{BGP4V2_PEER_ADMIN_STATUS,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_ADMIN_STATUS, 2, 16}},
{BGP4V2_PEER_STATE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_STATE, 1, 4}},
{BGP4V2_PEER_STATE,
ASN_INTEGER,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_STATE, 2, 16}},
{BGP4V2_PEER_DESCRIPTION,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_DESCRIPTION, 1, 4}},
{BGP4V2_PEER_DESCRIPTION,
ASN_OCTET_STR,
RONLY,
bgpv2PeerTable,
6,
{1, 2, 1, BGP4V2_PEER_DESCRIPTION, 2, 16}},
};
int bgp_snmp_bgp4v2_init(struct thread_master *tm)
{
REGISTER_MIB("mibII/bgpv2", bgpv2_variables, variable, bgpv2_oid);
return 0;
}

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/* BGP4V2-MIB SNMP support
*
* Using: http://www.circitor.fr/Mibs/Html/B/BGP4V2-MIB.php
*
* Copyright (C) 2022 Donatas Abraitis <donatas@opensourcerouting.org>
*
* This file is part of FRRouting (FRR).
*
* FRR is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later version.
*
* FRR is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _FRR_BGP_SNMP_BGP4V2_H_
#define _FRR_BGP_SNMP_BGP4V2_H_
/* bgp4V2 */
#define BGP4V2MIB 1, 3, 6, 1, 3, 5, 1
/* bgp4V2PeerEntry:
* offset 1.3.6.1.3.5.1.1.2.1.x.(1|2).(4|16) = 13
*/
#define BGP4V2_PEER_ENTRY_OFFSET 13
#define BGP4V2_PEER_INSTANCE 1
#define BGP4V2_PEER_LOCAL_ADDR_TYPE 2
#define BGP4V2_PEER_LOCAL_ADDR 3
#define BGP4V2_PEER_REMOTE_ADDR_TYPE 4
#define BGP4V2_PEER_REMOTE_ADDR 5
#define BGP4V2_PEER_LOCAL_PORT 6
#define BGP4V2_PEER_LOCAL_AS 7
#define BGP4V2_PEER_LOCAL_IDENTIFIER 8
#define BGP4V2_PEER_REMOTE_PORT 9
#define BGP4V2_PEER_REMOTE_AS 10
#define BGP4V2_PEER_REMOTE_IDENTIFIER 11
#define BGP4V2_PEER_ADMIN_STATUS 12
#define BGP4V2_PEER_STATE 13
#define BGP4V2_PEER_DESCRIPTION 14
/* bgp4V2PeerErrorsEntry */
#define BGP4V2_PEER_LAST_ERROR_CODE_RECEIVED 1
#define BGP4V2_PEER_LAST_ERROR_SUBCODE_RECEIVED 2
#define BGP4V2_PEER_LAST_ERROR_RECEIVED_TIME 3
#define BGP4V2_PEER_LAST_ERROR_RECEIVED_TEXT 4
#define BGP4V2_PEER_LAST_ERROR_RECEIVED_DATA 5
#define BGP4V2_PEER_LAST_ERROR_CODE_SENT 6
#define BGP4V2_PEER_LAST_ERROR_SUBCODE_SENT 7
#define BGP4V2_PEER_LAST_ERROR_SENT_TIME 8
#define BGP4V2_PEER_LAST_ERROR_SENT_TEXT 9
#define BGP4V2_PEER_LAST_ERROR_SENT_DATA 10
/* bgp4V2PeerEventTimesEntry */
#define BGP4V2_PEER_FSM_ESTABLISHED_TIME 1
#define BGP4V2_PEER_PEER_IN_UPDATES_ELAPSED_TIME 2
/* bgp4V2NlriEntry */
#define BGP4V2_NLRI_INDEX 1
#define BGP4V2_NLRI_AFI 2
#define BGP4V2_NLRI_SAFI 3
#define BGP4V2_NLRI_PREFIX_TYPE 4
#define BGP4V2_NLRI_PREFIX 5
#define BGP4V2_NLRI_PREFIX_LEN 6
#define BGP4V2_NLRI_BEST 7
#define BGP4V2_NLRI_CALC_LOCAL_PREF 8
#define BGP4V2_NLRI_ORIGIN 9
#define BGP4V2_NLRI_NEXT_HOP_ADDR_TYPE 10
#define BGP4V2_NLRI_NEXT_HOP_ADDR 11
#define BGP4V2_NLRI_LINK_LOCAL_NEXT_HOP_ADDR_TYPE 12
#define BGP4V2_NLRI_LINK_LOCAL_NEXT_HOP_ADDR 13
#define BGP4V2_NLRI_LOCAL_PREF_PRESENT 14
#define BGP4V2_NLRI_LOCAL_PREF 15
#define BGP4V2_NLRI_MED_PRESENT 16
#define BGP4V2_NLRI_MED 17
#define BGP4V2_NLRI_ATOMIC_AGGREGATE 18
#define BGP4V2_NLRI_AGGREGATOR_PRESENT 19
#define BGP4V2_NLRI_AGGREGATOR_AS 20
#define BGP4V2_NLRI_AGGREGATOR_ADDR 21
#define BGP4V2_NLRI_AS_PATH_CALC_LENGTH 22
#define BGP4V2_NLRI_AS_PATH_STRING 23
#define BGP4V2_NLRI_AS_PATH 24
#define BGP4V2_NLRI_PATH_ATTR_UNKNOWN 25
/* bgp4V2Notifications */
#define BGP4V2_ESTABLISHED_NOTIFICATION 1
#define BGP4V2_BACKWARD_TRANSITION_NOTIFICATION 2
extern int bgp_snmp_bgp4v2_init(struct thread_master *tm);
#endif /* _FRR_BGP_SNMP_BGP4V2_H_ */

5
bgpd/subdir.am
View File

@ -151,6 +151,9 @@ noinst_HEADERS += \
bgpd/bgp_route.h \
bgpd/bgp_routemap_nb.h \
bgpd/bgp_script.h \
bgpd/bgp_snmp.h \
bgpd/bgp_snmp_bgp4.h \
bgpd/bgp_snmp_bgp4v2.h \
bgpd/bgp_table.h \
bgpd/bgp_updgrp.h \
bgpd/bgp_vpn.h \
@ -189,7 +192,7 @@ bgpd_bgp_btoa_SOURCES = bgpd/bgp_btoa.c
bgpd_bgpd_LDADD = bgpd/libbgp.a $(RFPLDADD) lib/libfrr.la $(LIBYANG_LIBS) $(LIBCAP) $(LIBM) $(UST_LIBS)
bgpd_bgp_btoa_LDADD = bgpd/libbgp.a $(RFPLDADD) lib/libfrr.la $(LIBYANG_LIBS) $(LIBCAP) $(LIBM) $(UST_LIBS)
bgpd_bgpd_snmp_la_SOURCES = bgpd/bgp_snmp.c bgpd/bgp_mplsvpn_snmp.c
bgpd_bgpd_snmp_la_SOURCES = bgpd/bgp_snmp_bgp4.c bgpd/bgp_snmp_bgp4v2.c bgpd/bgp_snmp.c bgpd/bgp_mplsvpn_snmp.c
bgpd_bgpd_snmp_la_CFLAGS = $(AM_CFLAGS) $(SNMP_CFLAGS) -std=gnu11
bgpd_bgpd_snmp_la_LDFLAGS = $(MODULE_LDFLAGS)
bgpd_bgpd_snmp_la_LIBADD = lib/libfrrsnmp.la

10
lib/smux.h
View File

@ -44,6 +44,7 @@ extern "C" {
#define SNMP_INVALID 2
#define IN_ADDR_SIZE sizeof(struct in_addr)
#define IN6_ADDR_SIZE sizeof(struct in6_addr)
/* IANAipRouteProtocol */
#define IANAIPROUTEPROTOCOLOTHER 1
@ -87,8 +88,9 @@ struct index_oid {
/* Declare SMUX return value. */
#define SNMP_LOCAL_VARIABLES \
static long snmp_int_val __attribute__((unused)); \
static struct in_addr snmp_in_addr_val __attribute__((unused));
static uint8_t snmp_octet_val __attribute__((unused));
static struct in_addr snmp_in_addr_val __attribute__((unused)); \
static uint8_t snmp_octet_val __attribute__((unused)); \
static char snmp_string_val[255] __attribute__((unused));
#define SNMP_INTEGER(V) \
(*var_len = sizeof(snmp_int_val), snmp_int_val = V, \
(uint8_t *)&snmp_int_val)
@ -97,6 +99,10 @@ struct index_oid {
(*var_len = sizeof(snmp_octet_val), snmp_octet_val = V, \
(uint8_t *)&snmp_octet_val)
#define SNMP_STRING(V) \
(*var_len = MIN(sizeof(snmp_string_val), strlen(V) + 1), \
strlcpy(snmp_string_val, V, *var_len), (uint8_t *)&snmp_string_val)
#define SNMP_IPADDRESS(V) \
(*var_len = sizeof(struct in_addr), snmp_in_addr_val = V, \
(uint8_t *)&snmp_in_addr_val)