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pimd: Refactor pim_rpf_update to take a 'struct pim_rpf'

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Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2017-02-14 10:41:28 -05:00
parent d270b2163e
commit 42a0111b64
3 changed files with 19 additions and 19 deletions
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27
pimd/pim_rpf.c
View File

@ -184,14 +184,13 @@ static int nexthop_mismatch(const struct pim_nexthop *nh1,
(nh1->mrib_route_metric != nh2->mrib_route_metric);
}
enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct in_addr *old_rpf_addr)
enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct pim_rpf *old)
{
struct prefix save_rpf_addr;
struct pim_nexthop save_nexthop;
struct pim_rpf *rpf = &up->rpf;
struct pim_rpf saved;
save_nexthop = rpf->source_nexthop; /* detect change in pim_nexthop */
save_rpf_addr = rpf->rpf_addr; /* detect change in RPF'(S,G) */
saved.source_nexthop = rpf->source_nexthop;
saved.rpf_addr = rpf->rpf_addr;
if (pim_nexthop_lookup(&rpf->source_nexthop,
up->upstream_addr,
@ -211,7 +210,7 @@ enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct in_addr *old_
}
/* detect change in pim_nexthop */
if (nexthop_mismatch(&rpf->source_nexthop, &save_nexthop)) {
if (nexthop_mismatch(&rpf->source_nexthop, &saved.source_nexthop)) {
if (PIM_DEBUG_ZEBRA) {
char nhaddr_str[PREFIX_STRLEN];
@ -231,27 +230,29 @@ enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct in_addr *old_
}
/* detect change in RPF_interface(S) */
if (save_nexthop.interface != rpf->source_nexthop.interface) {
if (saved.source_nexthop.interface != rpf->source_nexthop.interface) {
if (PIM_DEBUG_ZEBRA) {
zlog_debug("%s %s: (S,G)=%s RPF_interface(S) changed from %s to %s",
__FILE__, __PRETTY_FUNCTION__,
up->sg_str,
save_nexthop.interface ? save_nexthop.interface->name : "<oldif?>",
saved.source_nexthop.interface ? saved.source_nexthop.interface->name : "<oldif?>",
rpf->source_nexthop.interface ? rpf->source_nexthop.interface->name : "<newif?>");
/* warning only */
}
pim_upstream_rpf_interface_changed(up, save_nexthop.interface);
pim_upstream_rpf_interface_changed(up, saved.source_nexthop.interface);
}
/* detect change in RPF'(S,G) */
if (save_rpf_addr.u.prefix4.s_addr != rpf->rpf_addr.u.prefix4.s_addr) {
if (saved.rpf_addr.u.prefix4.s_addr != rpf->rpf_addr.u.prefix4.s_addr) {
/* return old rpf to caller ? */
if (old_rpf_addr)
*old_rpf_addr = save_rpf_addr.u.prefix4;
if (old)
{
old->source_nexthop = saved.source_nexthop;
old->rpf_addr = saved.rpf_addr;
}
return PIM_RPF_CHANGED;
}

2
pimd/pim_rpf.h
View File

@ -63,7 +63,7 @@ struct pim_upstream;
extern long long nexthop_lookups_avoided;
int pim_nexthop_lookup(struct pim_nexthop *nexthop, struct in_addr addr, int neighbor_needed);
enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct in_addr *old_rpf_addr);
enum pim_rpf_result pim_rpf_update(struct pim_upstream *up, struct pim_rpf *old);
int pim_rpf_addr_is_inaddr_none (struct pim_rpf *rpf);
int pim_rpf_addr_is_inaddr_any (struct pim_rpf *rpf);

9
pimd/pim_zebra.c
View File

@ -366,12 +366,11 @@ static void scan_upstream_rpf_cache()
struct pim_upstream *up;
for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) {
struct in_addr old_rpf_addr;
struct interface *old_interface;
enum pim_rpf_result rpf_result;
struct pim_rpf old;
old_interface = up->rpf.source_nexthop.interface;
rpf_result = pim_rpf_update(up, &old_rpf_addr);
old.source_nexthop.interface = up->rpf.source_nexthop.interface;
rpf_result = pim_rpf_update(up, &old);
if (rpf_result == PIM_RPF_FAILURE)
continue;
@ -412,7 +411,7 @@ static void scan_upstream_rpf_cache()
/* send Prune(S,G) to the old upstream neighbor */
pim_joinprune_send(old_interface, old_rpf_addr,
pim_joinprune_send(old.source_nexthop.interface, old.rpf_addr.u.prefix4,
up, 0 /* prune */);
/* send Join(S,G) to the current upstream neighbor */