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-rw-r--r--pimd/pim_nht.h73
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diff --git a/pimd/pim_nht.h b/pimd/pim_nht.h
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+++ b/pimd/pim_nht.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PIM for Quagga
+ * Copyright (C) 2017 Cumulus Networks, Inc.
+ * Chirag Shah
+ */
+#ifndef PIM_NHT_H
+#define PIM_NHT_H
+
+#include "prefix.h"
+#include <zebra.h>
+#include "zclient.h"
+#include "vrf.h"
+
+#include "pimd.h"
+#include "pim_rp.h"
+#include "pim_rpf.h"
+
+/* PIM nexthop cache value structure. */
+struct pim_nexthop_cache {
+ struct pim_rpf rpf;
+ /* IGP route's metric. */
+ uint32_t metric;
+ uint32_t distance;
+ /* Nexthop number and nexthop linked list. */
+ uint8_t nexthop_num;
+ struct nexthop *nexthop;
+ int64_t last_update;
+ uint16_t flags;
+#define PIM_NEXTHOP_VALID (1 << 0)
+#define PIM_NEXTHOP_ANSWER_RECEIVED (1 << 1)
+
+ struct list *rp_list;
+ struct hash *upstream_hash;
+
+ /* bsr_count won't currently go above 1 as we only have global_scope,
+ * but if anyone adds scope support multiple scopes may NHT-track the
+ * same BSR
+ */
+ uint32_t bsr_count;
+};
+
+struct pnc_hash_walk_data {
+ struct pim_instance *pim;
+ struct interface *ifp;
+};
+
+int pim_parse_nexthop_update(ZAPI_CALLBACK_ARGS);
+int pim_find_or_track_nexthop(struct pim_instance *pim, pim_addr addr,
+ struct pim_upstream *up, struct rp_info *rp,
+ struct pim_nexthop_cache *out_pnc);
+void pim_delete_tracked_nexthop(struct pim_instance *pim, pim_addr addr,
+ struct pim_upstream *up, struct rp_info *rp);
+struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim,
+ struct pim_rpf *rpf);
+uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp);
+int pim_ecmp_nexthop_lookup(struct pim_instance *pim,
+ struct pim_nexthop *nexthop, pim_addr src,
+ struct prefix *grp, int neighbor_needed);
+void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient,
+ struct pim_nexthop_cache *pnc, int command);
+int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim, pim_addr src,
+ struct prefix *grp);
+void pim_rp_nexthop_del(struct rp_info *rp_info);
+
+/* for RPF check on BSM message receipt */
+void pim_nht_bsr_add(struct pim_instance *pim, pim_addr bsr_addr);
+void pim_nht_bsr_del(struct pim_instance *pim, pim_addr bsr_addr);
+/* RPF(bsr_addr) == src_ip%src_ifp? */
+bool pim_nht_bsr_rpf_check(struct pim_instance *pim, pim_addr bsr_addr,
+ struct interface *src_ifp, pim_addr src_ip);
+void pim_upstream_nh_if_update(struct pim_instance *pim, struct interface *ifp);
+#endif