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pimd: update pim upstream structure when RP gets deleted

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When a RP gets deleted, find all the (*, G) upstream whose
group belongs to the deleted RP.

case 1: if the group belongs to any other rp, then call
pim_upstream_update() to update the upstream addr and rpf
information.

case 2: If no RP found for the group, then clear the pim
upstream address and rpf information.

Signed-off-by: Sarita Patra <saritap@vmware.com>
This commit is contained in:
Sarita Patra 2019-02-22 10:08:59 -08:00
parent 28309df051
commit 8cfd72682e
1 changed files with 49 additions and 0 deletions
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49
pimd/pim_rp.c
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@ -689,6 +689,9 @@ int pim_rp_del(struct pim_instance *pim, const char *rp,
struct prefix nht_p;
struct route_node *rn;
bool was_plist = false;
struct rp_info *trp_info;
struct pim_upstream *up;
struct listnode *upnode;
if (group_range == NULL)
result = str2prefix("224.0.0.0/4", &group);
@ -733,6 +736,23 @@ int pim_rp_del(struct pim_instance *pim, const char *rp,
rp_all = pim_rp_find_match_group(pim, &g_all);
if (rp_all == rp_info) {
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
/* Find the upstream (*, G) whose upstream address is
* same as the deleted RP
*/
if ((up->upstream_addr.s_addr == rp_addr.s_addr) &&
(up->sg.src.s_addr == INADDR_ANY)) {
struct prefix grp;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
if (trp_info == rp_all) {
pim_upstream_rpf_clear(pim, up);
up->upstream_addr.s_addr = INADDR_ANY;
}
}
}
rp_all->rp.rpf_addr.family = AF_INET;
rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE;
rp_all->i_am_rp = 0;
@ -767,6 +787,34 @@ int pim_rp_del(struct pim_instance *pim, const char *rp,
pim_rp_refresh_group_to_rp_mapping(pim);
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
/* Find the upstream (*, G) whose upstream address is same as
* the deleted RP
*/
if ((up->upstream_addr.s_addr == rp_addr.s_addr) &&
(up->sg.src.s_addr == INADDR_ANY)) {
struct prefix grp;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
/* RP not found for the group grp */
if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) {
pim_upstream_rpf_clear(pim, up);
pim_rp_set_upstream_addr(pim,
&up->upstream_addr,
up->sg.src, up->sg.grp);
}
/* RP found for the group grp */
else
pim_upstream_update(pim, up);
}
}
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_SUCCESS;
}
@ -793,6 +841,7 @@ void pim_rp_setup(struct pim_instance *pim)
else {
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
zlog_debug(
"%s: NHT Local Nexthop not found for RP %s ",