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ospfd: clean up default route logic

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What a mess...

Signed-off-by: David Lamparter <equinox@diac24.net>
This commit is contained in:
David Lamparter 2019-07-29 14:46:05 +02:00
parent f1cf5af6da
commit d5eac1e0ca
4 changed files with 55 additions and 127 deletions
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36
ospfd/ospf_lsa.c
View File

@ -2202,28 +2202,20 @@ void ospf_external_lsa_refresh_default(struct ospf *ospf)
ei = ospf_default_external_info(ospf);
lsa = ospf_external_info_find_lsa(ospf, &p);
if (ei) {
if (lsa) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p",
(void *)lsa);
ospf_external_lsa_refresh(ospf, lsa, ei,
LSA_REFRESH_FORCE);
} else {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"LSA[Type5:0.0.0.0]: Originate AS-external-LSA");
ospf_external_lsa_originate(ospf, ei);
}
} else {
if (lsa) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"LSA[Type5:0.0.0.0]: Flush AS-external-LSA");
ospf_refresher_unregister_lsa(ospf, lsa);
ospf_lsa_flush_as(ospf, lsa);
}
if (ei && lsa) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p",
(void *)lsa);
ospf_external_lsa_refresh(ospf, lsa, ei, LSA_REFRESH_FORCE);
} else if (ei && !lsa) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"LSA[Type5:0.0.0.0]: Originate AS-external-LSA");
ospf_external_lsa_originate(ospf, ei);
} else if (lsa) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("LSA[Type5:0.0.0.0]: Flush AS-external-LSA");
ospf_external_lsa_flush(ospf, DEFAULT_ROUTE, &p, 0);
}
}

17
ospfd/ospf_vty.c
View File

@ -8487,22 +8487,8 @@ DEFUN (no_ospf_default_information_originate,
"Pointer to route-map entries\n")
{
VTY_DECLVAR_INSTANCE_CONTEXT(ospf, ospf);
struct prefix_ipv4 p;
struct ospf_external *ext;
struct ospf_redist *red;
p.family = AF_INET;
p.prefix.s_addr = 0;
p.prefixlen = 0;
ospf_external_lsa_flush(ospf, DEFAULT_ROUTE, &p, 0);
ext = ospf_external_lookup(ospf, DEFAULT_ROUTE, 0);
if (ext && EXTERNAL_INFO(ext)) {
ospf_external_info_delete(ospf, DEFAULT_ROUTE, 0, p);
ospf_external_del(ospf, DEFAULT_ROUTE, 0);
}
red = ospf_redist_lookup(ospf, DEFAULT_ROUTE, 0);
if (!red)
return CMD_SUCCESS;
@ -8510,7 +8496,8 @@ DEFUN (no_ospf_default_information_originate,
ospf_routemap_unset(red);
ospf_redist_del(ospf, DEFAULT_ROUTE, 0);
return ospf_redistribute_default_unset(ospf);
return ospf_redistribute_default_set(ospf, DEFAULT_ORIGINATE_NONE,
0, 0);
}
DEFUN (ospf_default_metric,

127
ospfd/ospf_zebra.c
View File

@ -744,10 +744,10 @@ int ospf_redistribute_unset(struct ospf *ospf, int type,
int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
int mvalue)
{
struct ospf_external *ext;
struct prefix_ipv4 p;
struct in_addr nexthop;
int cur_originate = ospf->default_originate;
const char *type_str = NULL;
nexthop.s_addr = 0;
p.family = AF_INET;
@ -756,39 +756,7 @@ int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
ospf->default_originate = originate;
ospf_external_add(ospf, DEFAULT_ROUTE, 0);
if (cur_originate == DEFAULT_ORIGINATE_NONE) {
/* First time configuration */
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[DEFAULT]: Start Type[%d], Metric[%d]",
metric_type(ospf, DEFAULT_ROUTE, 0),
metric_value(ospf, DEFAULT_ROUTE, 0));
if ((originate == DEFAULT_ORIGINATE_ALWAYS)
&& (ospf->router_id.s_addr)) {
/* always , so originate lsa even it doesn't
* exist in RIB.
*/
ospf_external_info_add(ospf, DEFAULT_ROUTE, 0,
p, 0, nexthop, 0);
ospf_external_lsa_refresh_default(ospf);
} else if (originate == DEFAULT_ORIGINATE_ZEBRA) {
/* Send msg to Zebra to validate default route
* existance.
*/
zclient_redistribute_default(
ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient, AFI_IP,
ospf->vrf_id);
}
ospf_asbr_status_update(ospf, ++ospf->redistribute);
return CMD_SUCCESS;
} else if (originate == cur_originate) {
if (cur_originate == originate) {
/* Refresh the lsa since metric might different */
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug(
@ -798,70 +766,51 @@ int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
metric_value(ospf, DEFAULT_ROUTE, 0));
ospf_external_lsa_refresh_default(ospf);
} else {
/* "default-info originate always" configured now,
* where "default-info originate" configured previoulsly.
*/
if (originate == DEFAULT_ORIGINATE_ALWAYS) {
zclient_redistribute_default(
ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,
zclient, AFI_IP, ospf->vrf_id);
/* here , ex-info should be added since ex-info might
* have not updated earlier if def route is not exist.
* If ex-iinfo ex-info already exist , it will return
* smoothly.
*/
ospf_external_info_add(ospf, DEFAULT_ROUTE, 0,
p, 0, nexthop, 0);
ospf_external_lsa_refresh_default(ospf);
} else {
/* "default-info originate" configured now,where
* "default-info originate always" configured
* previoulsy.
*/
ospf_external_lsa_flush(ospf, DEFAULT_ROUTE, &p, 0);
ext = ospf_external_lookup(ospf, DEFAULT_ROUTE, 0);
if (ext && EXTERNAL_INFO(ext))
ospf_external_info_delete(ospf,
DEFAULT_ROUTE, 0, p);
zclient_redistribute_default(
ZEBRA_REDISTRIBUTE_DEFAULT_ADD,
zclient, AFI_IP, ospf->vrf_id);
}
return CMD_SUCCESS;
}
return CMD_SUCCESS;
}
int ospf_redistribute_default_unset(struct ospf *ospf)
{
if (ospf->default_originate == DEFAULT_ORIGINATE_ZEBRA) {
if (!ospf_is_type_redistributed(ospf, DEFAULT_ROUTE, 0))
return CMD_SUCCESS;
switch (cur_originate) {
case DEFAULT_ORIGINATE_NONE:
break;
case DEFAULT_ORIGINATE_ZEBRA:
zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,
zclient, AFI_IP, ospf->vrf_id);
} else if (ospf->default_originate == DEFAULT_ORIGINATE_ALWAYS) {
struct prefix_ipv4 p;
p.family = AF_INET;
p.prefix.s_addr = 0;
p.prefixlen = 0;
ospf_external_info_delete(ospf, DEFAULT_ROUTE, 0, &p);
ospf->redistribute--;
break;
case DEFAULT_ORIGINATE_ALWAYS:
ospf_external_info_delete(ospf, DEFAULT_ROUTE, 0, p);
ospf_external_del(ospf, DEFAULT_ROUTE, 0);
ospf->redistribute--;
break;
}
ospf->default_originate = DEFAULT_ORIGINATE_NONE;
switch (originate) {
case DEFAULT_ORIGINATE_NONE:
type_str = "none";
break;
case DEFAULT_ORIGINATE_ZEBRA:
type_str = "normal";
ospf->redistribute++;
zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD,
zclient, AFI_IP, ospf->vrf_id);
break;
case DEFAULT_ORIGINATE_ALWAYS:
type_str = "always";
ospf->redistribute++;
ospf_external_add(ospf, DEFAULT_ROUTE, 0);
ospf_external_info_add(ospf, DEFAULT_ROUTE, 0, p, 0, nexthop,
0);
break;
}
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[DEFAULT]: Stop");
ospf_asbr_status_update(ospf, --ospf->redistribute);
zlog_debug("Redistribute[DEFAULT]: %s Type[%d], Metric[%d]",
type_str,
metric_type(ospf, DEFAULT_ROUTE, 0),
metric_value(ospf, DEFAULT_ROUTE, 0));
ospf_external_lsa_refresh_default(ospf);
ospf_asbr_status_update(ospf, ospf->redistribute);
return CMD_SUCCESS;
}

2
ospfd/ospfd.c
View File

@ -608,7 +608,7 @@ static void ospf_finish_final(struct ospf *ospf)
ospf_redist_del(ospf, i, red->instance);
}
}
ospf_redistribute_default_unset(ospf);
ospf_redistribute_default_set(ospf, DEFAULT_ORIGINATE_NONE, 0, 0);
for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area))
ospf_remove_vls_through_area(ospf, area);