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bgp: add mplsl3vpn notifications

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Add support for mplsL3VpnVrfUp and mplsL3VpnVrfDown notifications
from [RFC4382]

Signed-off-by: Pat Ruddy <pat@voltanet.io>
This commit is contained in:
Pat Ruddy 2020-10-21 18:28:41 +01:00
parent 4eb8c74f6c
commit 8db8e86a91
1 changed files with 45 additions and 6 deletions
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51
bgpd/bgp_mplsvpn_snmp.c
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@ -108,6 +108,10 @@
#define MPLSL3VPNVRFRTEINETCIDRXCPOINTER 17
#define MPLSL3VPNVRFRTEINETCIDRSTATUS 18
/* BGP Trap */
#define MPLSL3VPNVRFUP 1
#define MPLSL3VPNDOWN 2
/* SNMP value hack. */
#define INTEGER ASN_INTEGER
#define INTEGER32 ASN_INTEGER
@ -125,8 +129,10 @@ SNMP_LOCAL_VARIABLES
/* BGP-MPLS-MIB instances */
static oid mpls_l3vpn_oid[] = {MPLSL3VPNMIB};
static oid mpls_l3vpn_trap_oid[] = {MPLSL3VPNMIB, 0};
static char rd_buf[RD_ADDRSTRLEN];
static uint8_t bgp_mplsvpn_notif_enable = SNMP_FALSE;
/* Notifications enabled by default */
static uint8_t bgp_mplsvpn_notif_enable = SNMP_TRUE;
static oid mpls_l3vpn_policy_oid[2] = {0, 0};
static const char *empty_nhop = "";
char rt_description[VRF_NAMSIZ + RT_PREAMBLE_SIZE];
@ -581,17 +587,52 @@ static bool is_bgp_vrf_active(struct bgp *bgp)
return false;
}
/* BGP Traps. */
static struct trap_object l3vpn_trap_list[] = {{5, {1, 2, 1, 1, 5} },
{5, {1, 2, 2, 1, 6} } };
static int bgp_vrf_check_update_active(struct bgp *bgp, struct interface *ifp)
{
bool new_active = false;
oid trap;
struct index_oid trap_index[2];
if (!is_bgp_vrf_mplsvpn(bgp) || bgp->snmp_stats == NULL)
if (!is_bgp_vrf_mplsvpn(bgp) || bgp->snmp_stats == NULL
|| !bgp_mplsvpn_notif_enable)
return 0;
new_active = is_bgp_vrf_active(bgp);
if (bgp->snmp_stats->active != new_active) {
/* add trap in here */
bgp->snmp_stats->active = new_active;
/* send relevent trap */
if (bgp->snmp_stats->active)
trap = MPLSL3VPNVRFUP;
else
trap = MPLSL3VPNDOWN;
/*
* first index vrf_name + ifindex
* second index vrf_name
*/
trap_index[1].indexlen = strnlen(bgp->name, VRF_NAMSIZ);
oid_copy_str(trap_index[0].indexname, bgp->name,
trap_index[1].indexlen);
oid_copy_str(trap_index[1].indexname, bgp->name,
trap_index[1].indexlen);
trap_index[0].indexlen =
trap_index[1].indexlen + sizeof(ifindex_t);
oid_copy_int(trap_index[0].indexname + trap_index[1].indexlen,
(int *)&(ifp->ifindex));
smux_trap_multi_index(
mpls_l3vpn_variables, array_size(mpls_l3vpn_variables),
mpls_l3vpn_trap_oid, array_size(mpls_l3vpn_trap_oid),
mpls_l3vpn_oid, sizeof(mpls_l3vpn_oid) / sizeof(oid),
trap_index, array_size(trap_index), l3vpn_trap_list,
array_size(l3vpn_trap_list), trap);
}
bgp_mpls_l3vpn_update_last_changed(bgp);
return 0;
}
@ -668,13 +709,11 @@ static int write_mplsL3vpnNotificationEnable(int action, uint8_t *var_val,
{
uint32_t intval;
if (var_val_type != ASN_INTEGER) {
if (var_val_type != ASN_INTEGER)
return SNMP_ERR_WRONGTYPE;
}
if (var_val_len != sizeof(long)) {
if (var_val_len != sizeof(long))
return SNMP_ERR_WRONGLENGTH;
}
intval = *(long *)var_val;
bgp_mplsvpn_notif_enable = intval;