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ldpd: defer register for info until configured

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Instead of registering to receive default-VRF information and routes
when first connected to zebra, defer the registration until some ldp
configuration is entered.

This avoids redistributing IPv4/IPv6 routes to ldpd when not needed.

Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Signed-off-by: Emanuele Di Pascale <emanuele@voltanet.io>
This commit is contained in:
Fredi Raspall 2021-02-18 23:45:08 +01:00 committed by Emanuele Di Pascale
parent 22a8c40f2a
commit ce510d2e0e
3 changed files with 39 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ldpd/ldp_vty_conf.c
View File

@ -429,6 +429,9 @@ ldp_vty_mpls_ldp(struct vty *vty, const char *negate)
vty_conf->flags |= F_LDPD_ENABLED;
}
/* register / de-register to recv info from zebra */
ldp_zebra_regdereg_zebra_info(!negate);
ldp_config_apply(vty, vty_conf);
return (CMD_SUCCESS);

39
ldpd/ldp_zebra.c
View File

@ -54,6 +54,7 @@ static int ldp_zebra_opaque_msg_handler(ZAPI_CALLBACK_ARGS);
static void ldp_sync_zebra_init(void);
static struct zclient *zclient;
static bool zebra_registered = false;
static void
ifp2kif(struct interface *ifp, struct kif *kif)
@ -629,14 +630,42 @@ ldp_zebra_read_pw_status_update(ZAPI_CALLBACK_ARGS)
return (0);
}
void ldp_zebra_regdereg_zebra_info(bool want_register)
{
if (zebra_registered == want_register)
return;
log_debug("%s to receive default VRF information",
want_register ? "Register" : "De-register");
if (want_register) {
zclient_send_reg_requests(zclient, VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient,
AFI_IP6, ZEBRA_ROUTE_ALL, 0,
VRF_DEFAULT);
} else {
zclient_send_dereg_requests(zclient, VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
AFI_IP, ZEBRA_ROUTE_ALL, 0,
VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
AFI_IP6, ZEBRA_ROUTE_ALL, 0,
VRF_DEFAULT);
}
zebra_registered = want_register;
}
static void
ldp_zebra_connected(struct zclient *zclient)
{
zclient_send_reg_requests(zclient, VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP,
ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT);
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP6,
ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT);
zebra_registered = false;
/* if MPLS was already enabled and we are re-connecting, register again
*/
if (vty_conf->flags & F_LDPD_ENABLED)
ldp_zebra_regdereg_zebra_info(true);
ldp_zebra_opaque_register();

2
ldpd/ldpd.h
View File

@ -906,6 +906,8 @@ int ldp_sync_zebra_send_state_update(struct ldp_igp_sync_if_state *);
int ldp_zebra_send_rlfa_labels(struct zapi_rlfa_response *
rlfa_labels);
void ldp_zebra_regdereg_zebra_info(bool want_register);
/* compatibility */
#ifndef __OpenBSD__
#define __IPV6_ADDR_MC_SCOPE(a) ((a)->s6_addr[1] & 0x0f)