pimd: move BSM clear into BSM code

... where it actually belongs.  And make a bunch of stuff static, since
it's no longer used across files now.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 121 insertions, 5 deletions

diff --git a/pimd/pim_bsm.c b/pimd/pim_bsm.c
index b7207aa212..2078a859e5 100644
--- a/pimd/pim_bsm.c
+++ b/pimd/pim_bsm.c
@@ -70,7 +70,7 @@ static void pim_bsm_rpinfo_free(struct bsm_rpinfo *bsrp_info)
 	XFREE(MTYPE_PIM_BSRP_INFO, bsrp_info);
 }
 
-void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head)
+static void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head)
 {
 	struct bsm_rpinfo *bsrp_info;
 
@@ -78,14 +78,14 @@ void pim_bsm_rpinfos_free(struct bsm_rpinfos_head *head)
 		pim_bsm_rpinfo_free(bsrp_info);
 }
 
-void pim_free_bsgrp_data(struct bsgrp_node *bsgrp_node)
+static void pim_free_bsgrp_data(struct bsgrp_node *bsgrp_node)
 {
 	pim_bsm_rpinfos_free(bsgrp_node->bsrp_list);
 	pim_bsm_rpinfos_free(bsgrp_node->partial_bsrp_list);
 	XFREE(MTYPE_PIM_BSGRP_NODE, bsgrp_node);
 }
 
-void pim_free_bsgrp_node(struct route_table *rt, struct prefix *grp)
+static void pim_free_bsgrp_node(struct route_table *rt, struct prefix *grp)
 {
 	struct route_node *rn;
 
@@ -102,7 +102,7 @@ static void pim_bsm_frag_free(struct bsm_frag *bsfrag)
 	XFREE(MTYPE_PIM_BSM_FRAG, bsfrag);
 }
 
-void pim_bsm_frags_free(struct bsm_scope *scope)
+static void pim_bsm_frags_free(struct bsm_scope *scope)
 {
 	struct bsm_frag *bsfrag;
 
@@ -202,7 +202,7 @@ static int pim_on_bs_timer(struct thread *t)
 	return 0;
 }
 
-void pim_bs_timer_stop(struct bsm_scope *scope)
+static void pim_bs_timer_stop(struct bsm_scope *scope)
 {
 	if (PIM_DEBUG_BSM)
 		zlog_debug("%s : BS timer being stopped of sz: %d", __func__,
@@ -569,6 +569,122 @@ static void pim_bsm_update(struct pim_instance *pim, struct in_addr bsr,
 	pim->global_scope.current_bsr_last_ts = pim_time_monotonic_sec();
 }
 
+void pim_bsm_clear(struct pim_instance *pim)
+{
+	struct route_node *rn;
+	struct route_node *rpnode;
+	struct bsgrp_node *bsgrp;
+	struct prefix nht_p;
+	struct prefix g_all;
+	struct rp_info *rp_all;
+	struct pim_upstream *up;
+	struct rp_info *rp_info;
+
+	if (pim->global_scope.current_bsr.s_addr)
+		pim_nht_bsr_del(pim, pim->global_scope.current_bsr);
+
+	/* Reset scope zone data */
+	pim->global_scope.accept_nofwd_bsm = false;
+	pim->global_scope.state = ACCEPT_ANY;
+	pim->global_scope.current_bsr.s_addr = INADDR_ANY;
+	pim->global_scope.current_bsr_prio = 0;
+	pim->global_scope.current_bsr_first_ts = 0;
+	pim->global_scope.current_bsr_last_ts = 0;
+	pim->global_scope.bsm_frag_tag = 0;
+	pim_bsm_frags_free(&pim->global_scope);
+
+	pim_bs_timer_stop(&pim->global_scope);
+
+	for (rn = route_top(pim->global_scope.bsrp_table); rn;
+	     rn = route_next(rn)) {
+		bsgrp = rn->info;
+		if (!bsgrp)
+			continue;
+
+		rpnode = route_node_lookup(pim->rp_table, &bsgrp->group);
+
+		if (!rpnode) {
+			pim_free_bsgrp_node(bsgrp->scope->bsrp_table,
+					    &bsgrp->group);
+			pim_free_bsgrp_data(bsgrp);
+			continue;
+		}
+
+		rp_info = (struct rp_info *)rpnode->info;
+
+		if ((!rp_info) || (rp_info->rp_src != RP_SRC_BSR)) {
+			pim_free_bsgrp_node(bsgrp->scope->bsrp_table,
+					    &bsgrp->group);
+			pim_free_bsgrp_data(bsgrp);
+			continue;
+		}
+
+		/* Deregister addr with Zebra NHT */
+		nht_p.family = AF_INET;
+		nht_p.prefixlen = IPV4_MAX_BITLEN;
+		nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4;
+
+		if (PIM_DEBUG_PIM_NHT_RP) {
+			zlog_debug("%s: Deregister RP addr %pFX with Zebra ",
+				   __func__, &nht_p);
+		}
+
+		pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info);
+
+		if (!str2prefix("224.0.0.0/4", &g_all))
+			return;
+
+		rp_all = pim_rp_find_match_group(pim, &g_all);
+
+		if (rp_all == rp_info) {
+			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;
+		} else {
+			/* Delete the rp_info from rp-list */
+			listnode_delete(pim->rp_list, rp_info);
+
+			/* Delete the rp node from rp_table */
+			rpnode->info = NULL;
+			route_unlock_node(rpnode);
+			route_unlock_node(rpnode);
+			XFREE(MTYPE_PIM_RP, rp_info);
+		}
+
+		pim_free_bsgrp_node(bsgrp->scope->bsrp_table, &bsgrp->group);
+		pim_free_bsgrp_data(bsgrp);
+	}
+	pim_rp_refresh_group_to_rp_mapping(pim);
+
+
+	frr_each (rb_pim_upstream, &pim->upstream_head, up) {
+		/* Find the upstream (*, G) whose upstream address is same as
+		 * the RP
+		 */
+		if (up->sg.src.s_addr != INADDR_ANY)
+			continue;
+
+		struct prefix grp;
+		struct rp_info *trp_info;
+
+		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);
+		} else {
+			/* RP found for the group grp */
+			pim_upstream_update(pim, up);
+		}
+	}
+}
+
 static bool pim_bsm_send_intf(uint8_t *buf, int len, struct interface *ifp,
 			      struct in_addr dst_addr)
 {