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bgpd: modify bmp_get_peer_distinguisher to support AFI_UNSPEC

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If a given L3VRF instance requests a peer distinguisher
for a peer up/down message, the AFI_UNSPEC afi parameter
will be used; no RD is chosen for this AFI.

Fix this by priorizing the AFI_IP value before the AFI_IP6
value. For instance, a router with both RD set for each
address-family, peer up/down messages will be sent with the
RD set to the one for AFI_IP.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2024-10-30 22:20:30 +01:00
parent d55a5864dd
commit b7059a8fd9
1 changed files with 11 additions and 4 deletions
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15
bgpd/bgp_bmp.c
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@ -279,6 +279,8 @@ static inline int bmp_get_peer_distinguisher(struct bmp *bmp, afi_t afi,
uint8_t peer_type,
uint64_t *result_ref)
{
/* use RD if set in VRF config */
struct prefix_rd *prd;
/* remove this check when the other peer types get correct peer dist.
*(RFC7854) impl.
@ -294,11 +296,16 @@ static inline int bmp_get_peer_distinguisher(struct bmp *bmp, afi_t afi,
if (bgp->inst_type == VRF_DEFAULT)
return (*result_ref = 0);
/* use RD if set in VRF config for this AFI */
struct prefix_rd *prd = &bgp->vpn_policy[afi].tovpn_rd;
prd = &bgp->vpn_policy[AFI_IP].tovpn_rd;
if ((afi == AFI_IP || afi == AFI_UNSPEC) &&
CHECK_FLAG(bgp->vpn_policy[AFI_IP].flags, BGP_VPN_POLICY_TOVPN_RD_SET)) {
memcpy(result_ref, prd->val, sizeof(prd->val));
return 0;
}
if (CHECK_FLAG(bgp->vpn_policy[afi].flags,
BGP_VPN_POLICY_TOVPN_RD_SET)) {
prd = &bgp->vpn_policy[AFI_IP6].tovpn_rd;
if ((afi == AFI_IP6 || afi == AFI_UNSPEC) &&
CHECK_FLAG(bgp->vpn_policy[AFI_IP6].flags, BGP_VPN_POLICY_TOVPN_RD_SET)) {
memcpy(result_ref, prd->val, sizeof(prd->val));
return 0;
}