Adding upstream version 8.4.4.upstream/8.4.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 872 insertions, 0 deletions

diff --git a/bgpd/bgp_route.h b/bgpd/bgp_route.h
new file mode 100644
index 0000000..e776ae4
--- /dev/null
+++ b/bgpd/bgp_route.h
@@ -0,0 +1,872 @@
+/* BGP routing information base
+ * Copyright (C) 1996, 97, 98, 2000 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _QUAGGA_BGP_ROUTE_H
+#define _QUAGGA_BGP_ROUTE_H
+
+#include <stdbool.h>
+
+#include "hook.h"
+#include "queue.h"
+#include "nexthop.h"
+#include "bgp_table.h"
+#include "bgp_addpath_types.h"
+#include "bgp_rpki.h"
+
+struct bgp_nexthop_cache;
+struct bgp_route_evpn;
+
+enum bgp_show_type {
+	bgp_show_type_normal,
+	bgp_show_type_regexp,
+	bgp_show_type_prefix_list,
+	bgp_show_type_access_list,
+	bgp_show_type_filter_list,
+	bgp_show_type_route_map,
+	bgp_show_type_neighbor,
+	bgp_show_type_cidr_only,
+	bgp_show_type_prefix_longer,
+	bgp_show_type_community_alias,
+	bgp_show_type_community_all,
+	bgp_show_type_community,
+	bgp_show_type_community_exact,
+	bgp_show_type_community_list,
+	bgp_show_type_community_list_exact,
+	bgp_show_type_lcommunity_all,
+	bgp_show_type_lcommunity,
+	bgp_show_type_lcommunity_exact,
+	bgp_show_type_lcommunity_list,
+	bgp_show_type_lcommunity_list_exact,
+	bgp_show_type_flap_statistics,
+	bgp_show_type_flap_neighbor,
+	bgp_show_type_dampend_paths,
+	bgp_show_type_damp_neighbor,
+	bgp_show_type_detail,
+	bgp_show_type_rpki,
+	bgp_show_type_prefix_version,
+};
+
+enum bgp_show_adj_route_type {
+	bgp_show_adj_route_advertised,
+	bgp_show_adj_route_received,
+	bgp_show_adj_route_filtered,
+	bgp_show_adj_route_bestpath,
+};
+
+
+#define BGP_SHOW_SCODE_HEADER                                                  \
+	"Status codes:  s suppressed, d damped, "                              \
+	"h history, * valid, > best, = multipath,\n"                           \
+	"               i internal, r RIB-failure, S Stale, R Removed\n"
+#define BGP_SHOW_OCODE_HEADER                                                  \
+	"Origin codes:  i - IGP, e - EGP, ? - incomplete\n"
+#define BGP_SHOW_NCODE_HEADER "Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self\n"
+#define BGP_SHOW_RPKI_HEADER                                                   \
+	"RPKI validation codes: V valid, I invalid, N Not found\n\n"
+#define BGP_SHOW_HEADER "   Network          Next Hop            Metric LocPrf Weight Path\n"
+#define BGP_SHOW_HEADER_WIDE "   Network                                      Next Hop                                  Metric LocPrf Weight Path\n"
+
+/* Maximum number of labels we can process or send with a prefix. We
+ * really do only 1 for MPLS (BGP-LU) but we can do 2 for EVPN-VxLAN.
+ */
+#define BGP_MAX_LABELS 2
+
+/* Maximum number of sids we can process or send with a prefix. */
+#define BGP_MAX_SIDS 6
+
+/* Maximum buffer length for storing BGP best path selection reason */
+#define BGP_MAX_SELECTION_REASON_STR_BUF 32
+
+/* Error codes for handling NLRI */
+#define BGP_NLRI_PARSE_OK 0
+#define BGP_NLRI_PARSE_ERROR_PREFIX_OVERFLOW -1
+#define BGP_NLRI_PARSE_ERROR_PACKET_OVERFLOW -2
+#define BGP_NLRI_PARSE_ERROR_PREFIX_LENGTH -3
+#define BGP_NLRI_PARSE_ERROR_PACKET_LENGTH -4
+#define BGP_NLRI_PARSE_ERROR_LABEL_LENGTH -5
+#define BGP_NLRI_PARSE_ERROR_EVPN_MISSING_TYPE -6
+#define BGP_NLRI_PARSE_ERROR_EVPN_TYPE2_SIZE -7
+#define BGP_NLRI_PARSE_ERROR_EVPN_TYPE3_SIZE -8
+#define BGP_NLRI_PARSE_ERROR_EVPN_TYPE4_SIZE -9
+#define BGP_NLRI_PARSE_ERROR_EVPN_TYPE5_SIZE -10
+#define BGP_NLRI_PARSE_ERROR_FLOWSPEC_IPV6_NOT_SUPPORTED -11
+#define BGP_NLRI_PARSE_ERROR_FLOWSPEC_NLRI_SIZELIMIT -12
+#define BGP_NLRI_PARSE_ERROR_FLOWSPEC_BAD_FORMAT -13
+#define BGP_NLRI_PARSE_ERROR_ADDRESS_FAMILY -14
+#define BGP_NLRI_PARSE_ERROR_EVPN_TYPE1_SIZE -15
+#define BGP_NLRI_PARSE_ERROR -32
+
+/* 1. local MAC-IP/type-2 paths in the VNI routing table are linked to the
+ * destination ES
+ * 2. remote MAC-IP paths in the global routing table are linked to the
+ * destination ES
+ */
+struct bgp_path_es_info {
+	/* back pointer to the route */
+	struct bgp_path_info *pi;
+	vni_t vni;
+	/* destination ES */
+	struct bgp_evpn_es *es;
+	/* memory used for linking the path to the destination ES */
+	struct listnode es_listnode;
+	uint8_t flags;
+/* Path is linked to the VNI list */
+#define BGP_EVPN_PATH_ES_INFO_VNI_LIST (1 << 0)
+/* Path is linked to the global list */
+#define BGP_EVPN_PATH_ES_INFO_GLOBAL_LIST (1 << 1)
+};
+
+/* IP paths imported into the VRF from an EVPN route source
+ * are linked to the nexthop/VTEP IP
+ */
+struct bgp_path_evpn_nh_info {
+	/* back pointer to the route */
+	struct bgp_path_info *pi;
+	struct bgp_evpn_nh *nh;
+	/* memory used for linking the path to the nexthop */
+	struct listnode nh_listnode;
+};
+
+struct bgp_path_mh_info {
+	struct bgp_path_es_info *es_info;
+	struct bgp_path_evpn_nh_info *nh_info;
+};
+
+struct bgp_sid_info {
+	struct in6_addr sid;
+	uint8_t loc_block_len;
+	uint8_t loc_node_len;
+	uint8_t func_len;
+	uint8_t arg_len;
+	uint8_t transposition_len;
+	uint8_t transposition_offset;
+};
+
+/* Ancillary information to struct bgp_path_info,
+ * used for uncommonly used data (aggregation, MPLS, etc.)
+ * and lazily allocated to save memory.
+ */
+struct bgp_path_info_extra {
+	/* Pointer to dampening structure.  */
+	struct bgp_damp_info *damp_info;
+
+	/** List of aggregations that suppress this path. */
+	struct list *aggr_suppressors;
+
+	/* Nexthop reachability check.  */
+	uint32_t igpmetric;
+
+	/* MPLS label(s) - VNI(s) for EVPN-VxLAN  */
+	mpls_label_t label[BGP_MAX_LABELS];
+	uint32_t num_labels;
+
+	/* af specific flags */
+	uint16_t af_flags;
+#define BGP_EVPN_MACIP_TYPE_SVI_IP (1 << 0)
+
+	/* SRv6 SID(s) for SRv6-VPN */
+	struct bgp_sid_info sid[BGP_MAX_SIDS];
+	uint32_t num_sids;
+
+#ifdef ENABLE_BGP_VNC
+	union {
+
+		struct {
+			void *rfapi_handle; /* export: NVE advertising this
+					       route */
+			struct list *local_nexthops; /* optional, for static
+							routes */
+		} export;
+
+		struct {
+			struct thread *timer;
+			void *hme; /* encap monitor, if this is a VPN route */
+			struct prefix_rd
+				rd; /* import: route's route-distinguisher */
+			uint8_t un_family; /* family of cached un address, 0 if
+					     unset */
+			union {
+				struct in_addr addr4;
+				struct in6_addr addr6;
+			} un; /* cached un address */
+			time_t create_time;
+			struct prefix aux_prefix; /* AFI_L2VPN: the IP addr,
+						     if family set */
+		} import;
+
+	} vnc;
+#endif
+
+	/* For imported routes into a VNI (or VRF), this points to the parent.
+	 */
+	void *parent;
+
+	/*
+	 * Some tunnelish parameters follow. Maybe consolidate into an
+	 * internal tunnel structure?
+	 */
+
+	/*
+	 * Original bgp instance for imported routes. Needed for:
+	 * 1. Find all routes from a specific vrf for deletion
+	 * 2. vrf context of original nexthop
+	 *
+	 * Store pointer to bgp instance rather than bgp->vrf_id because
+	 * bgp->vrf_id is not always valid (or may change?).
+	 *
+	 * Set to NULL if route is not imported from another bgp instance.
+	 */
+	struct bgp *bgp_orig;
+
+	/*
+	 * Original bgp session to know if the session is a
+	 * connected EBGP session or not
+	 */
+	struct peer *peer_orig;
+
+	/*
+	 * Nexthop in context of original bgp instance. Needed
+	 * for label resolution of core mpls routes exported to a vrf.
+	 * Set nexthop_orig.family to 0 if not valid.
+	 */
+	struct prefix nexthop_orig;
+	/* presence of FS pbr firewall based entry */
+	struct list *bgp_fs_pbr;
+	/* presence of FS pbr iprule based entry */
+	struct list *bgp_fs_iprule;
+	/* Destination Ethernet Segment links for EVPN MH */
+	struct bgp_path_mh_info *mh_info;
+};
+
+struct bgp_path_info {
+	/* For linked list. */
+	struct bgp_path_info *next;
+	struct bgp_path_info *prev;
+
+	/* For nexthop linked list */
+	LIST_ENTRY(bgp_path_info) nh_thread;
+
+	/* Back pointer to the prefix node */
+	struct bgp_dest *net;
+
+	/* Back pointer to the nexthop structure */
+	struct bgp_nexthop_cache *nexthop;
+
+	/* Peer structure.  */
+	struct peer *peer;
+
+	/* Attribute structure.  */
+	struct attr *attr;
+
+	/* Extra information */
+	struct bgp_path_info_extra *extra;
+
+
+	/* Multipath information */
+	struct bgp_path_info_mpath *mpath;
+
+	/* Uptime.  */
+	time_t uptime;
+
+	/* reference count */
+	int lock;
+
+	/* BGP information status.  */
+	uint16_t flags;
+#define BGP_PATH_IGP_CHANGED (1 << 0)
+#define BGP_PATH_DAMPED (1 << 1)
+#define BGP_PATH_HISTORY (1 << 2)
+#define BGP_PATH_SELECTED (1 << 3)
+#define BGP_PATH_VALID (1 << 4)
+#define BGP_PATH_ATTR_CHANGED (1 << 5)
+#define BGP_PATH_DMED_CHECK (1 << 6)
+#define BGP_PATH_DMED_SELECTED (1 << 7)
+#define BGP_PATH_STALE (1 << 8)
+#define BGP_PATH_REMOVED (1 << 9)
+#define BGP_PATH_COUNTED (1 << 10)
+#define BGP_PATH_MULTIPATH (1 << 11)
+#define BGP_PATH_MULTIPATH_CHG (1 << 12)
+#define BGP_PATH_RIB_ATTR_CHG (1 << 13)
+#define BGP_PATH_ANNC_NH_SELF (1 << 14)
+#define BGP_PATH_LINK_BW_CHG (1 << 15)
+
+	/* BGP route type.  This can be static, RIP, OSPF, BGP etc.  */
+	uint8_t type;
+
+	/* When above type is BGP.  This sub type specify BGP sub type
+	   information.  */
+	uint8_t sub_type;
+#define BGP_ROUTE_NORMAL       0
+#define BGP_ROUTE_STATIC       1
+#define BGP_ROUTE_AGGREGATE    2
+#define BGP_ROUTE_REDISTRIBUTE 3
+#ifdef ENABLE_BGP_VNC
+# define BGP_ROUTE_RFP          4
+#endif
+#define BGP_ROUTE_IMPORTED     5        /* from another bgp instance/safi */
+
+	unsigned short instance;
+
+	/* Addpath identifiers */
+	uint32_t addpath_rx_id;
+	struct bgp_addpath_info_data tx_addpath;
+};
+
+/* Structure used in BGP path selection */
+struct bgp_path_info_pair {
+	struct bgp_path_info *old;
+	struct bgp_path_info *new;
+};
+
+/* BGP static route configuration. */
+struct bgp_static {
+	/* Backdoor configuration.  */
+	int backdoor;
+
+	/* Label index configuration; applies to LU prefixes. */
+	uint32_t label_index;
+#define BGP_INVALID_LABEL_INDEX   0xFFFFFFFF
+
+	/* Import check status.  */
+	uint8_t valid;
+
+	/* IGP metric. */
+	uint32_t igpmetric;
+
+	/* IGP nexthop. */
+	struct in_addr igpnexthop;
+
+	/* Atomic set reference count (ie cause of pathlimit) */
+	uint32_t atomic;
+
+	/* BGP redistribute route-map.  */
+	struct {
+		char *name;
+		struct route_map *map;
+	} rmap;
+
+	/* Route Distinguisher */
+	struct prefix_rd prd;
+
+	/* MPLS label.  */
+	mpls_label_t label;
+
+	/* EVPN */
+	esi_t *eth_s_id;
+	struct ethaddr *router_mac;
+	uint16_t encap_tunneltype;
+	struct prefix gatewayIp;
+};
+
+/* Aggreagete address:
+ *
+ *  advertise-map  Set condition to advertise attribute
+ *  as-set         Generate AS set path information
+ *  attribute-map  Set attributes of aggregate
+ *  route-map      Set parameters of aggregate
+ *  summary-only   Filter more specific routes from updates
+ *  suppress-map   Conditionally filter more specific routes from updates
+ *  <cr>
+ */
+struct bgp_aggregate {
+	/* Summary-only flag. */
+	uint8_t summary_only;
+
+	/* AS set generation. */
+	uint8_t as_set;
+
+	/* Route-map for aggregated route. */
+	struct {
+		char *name;
+		struct route_map *map;
+	} rmap;
+
+	/* Suppress-count. */
+	unsigned long count;
+
+	/* Count of routes of origin type incomplete under this aggregate. */
+	unsigned long incomplete_origin_count;
+
+	/* Count of routes of origin type egp under this aggregate. */
+	unsigned long egp_origin_count;
+
+	/* Optional modify flag to override ORIGIN */
+	uint8_t origin;
+
+	/* Hash containing the communities of all the
+	 * routes under this aggregate.
+	 */
+	struct hash *community_hash;
+
+	/* Hash containing the extended communities of all the
+	 * routes under this aggregate.
+	 */
+	struct hash *ecommunity_hash;
+
+	/* Hash containing the large communities of all the
+	 * routes under this aggregate.
+	 */
+	struct hash *lcommunity_hash;
+
+	/* Hash containing the AS-Path of all the
+	 * routes under this aggregate.
+	 */
+	struct hash *aspath_hash;
+
+	/* Aggregate route's community. */
+	struct community *community;
+
+	/* Aggregate route's extended community. */
+	struct ecommunity *ecommunity;
+
+	/* Aggregate route's large community. */
+	struct lcommunity *lcommunity;
+
+	/* Aggregate route's as-path. */
+	struct aspath *aspath;
+
+	/* SAFI configuration. */
+	safi_t safi;
+
+	/** Match only equal MED. */
+	bool match_med;
+	/* MED matching state. */
+	/** Did we get the first MED value? */
+	bool med_initialized;
+	/** Are there MED mismatches? */
+	bool med_mismatched;
+	/** MED value found in current group. */
+	uint32_t med_matched_value;
+
+	/**
+	 * Test if aggregated address MED of all route match, otherwise
+	 * returns `false`. This macro will also return `true` if MED
+	 * matching is disabled.
+	 */
+#define AGGREGATE_MED_VALID(aggregate)                                         \
+	(((aggregate)->match_med && !(aggregate)->med_mismatched)              \
+	 || !(aggregate)->match_med)
+
+	/** Suppress map route map name (`NULL` when disabled). */
+	char *suppress_map_name;
+	/** Suppress map route map pointer. */
+	struct route_map *suppress_map;
+};
+
+#define BGP_NEXTHOP_AFI_FROM_NHLEN(nhlen)                                      \
+	((nhlen) < IPV4_MAX_BYTELEN                                            \
+		 ? 0                                                           \
+		 : ((nhlen) < IPV6_MAX_BYTELEN ? AFI_IP : AFI_IP6))
+
+#define BGP_ATTR_MP_NEXTHOP_LEN_IP6(attr)                                      \
+	((attr)->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL ||               \
+	 (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL ||        \
+	 (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV6_GLOBAL ||              \
+	 (attr)->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL)
+
+#define BGP_ATTR_NEXTHOP_AFI_IP6(attr)                                         \
+	(!CHECK_FLAG(attr->flag, ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) &&          \
+	 BGP_ATTR_MP_NEXTHOP_LEN_IP6(attr))
+
+#define BGP_PATH_COUNTABLE(BI)                                                 \
+	(!CHECK_FLAG((BI)->flags, BGP_PATH_HISTORY)                            \
+	 && !CHECK_FLAG((BI)->flags, BGP_PATH_REMOVED))
+
+/* Flags which indicate a route is unuseable in some form */
+#define BGP_PATH_UNUSEABLE                                                     \
+	(BGP_PATH_HISTORY | BGP_PATH_DAMPED | BGP_PATH_REMOVED)
+/* Macro to check BGP information is alive or not.  Sadly,
+ * not equivalent to just checking previous, because of the
+ * sense of the additional VALID flag.
+ */
+#define BGP_PATH_HOLDDOWN(BI)                                                  \
+	(!CHECK_FLAG((BI)->flags, BGP_PATH_VALID)                              \
+	 || CHECK_FLAG((BI)->flags, BGP_PATH_UNUSEABLE))
+
+#define DISTRIBUTE_IN_NAME(F)   ((F)->dlist[FILTER_IN].name)
+#define DISTRIBUTE_IN(F)        ((F)->dlist[FILTER_IN].alist)
+#define DISTRIBUTE_OUT_NAME(F)  ((F)->dlist[FILTER_OUT].name)
+#define DISTRIBUTE_OUT(F)       ((F)->dlist[FILTER_OUT].alist)
+
+#define PREFIX_LIST_IN_NAME(F)  ((F)->plist[FILTER_IN].name)
+#define PREFIX_LIST_IN(F)       ((F)->plist[FILTER_IN].plist)
+#define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
+#define PREFIX_LIST_OUT(F)      ((F)->plist[FILTER_OUT].plist)
+
+#define FILTER_LIST_IN_NAME(F)  ((F)->aslist[FILTER_IN].name)
+#define FILTER_LIST_IN(F)       ((F)->aslist[FILTER_IN].aslist)
+#define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
+#define FILTER_LIST_OUT(F)      ((F)->aslist[FILTER_OUT].aslist)
+
+#define ROUTE_MAP_IN_NAME(F)    ((F)->map[RMAP_IN].name)
+#define ROUTE_MAP_IN(F)         ((F)->map[RMAP_IN].map)
+#define ROUTE_MAP_OUT_NAME(F)   ((F)->map[RMAP_OUT].name)
+#define ROUTE_MAP_OUT(F)        ((F)->map[RMAP_OUT].map)
+
+#define UNSUPPRESS_MAP_NAME(F)  ((F)->usmap.name)
+#define UNSUPPRESS_MAP(F)       ((F)->usmap.map)
+
+#define ADVERTISE_MAP_NAME(F)	((F)->advmap.aname)
+#define ADVERTISE_MAP(F)	((F)->advmap.amap)
+
+#define ADVERTISE_CONDITION(F)	((F)->advmap.condition)
+
+#define CONDITION_MAP_NAME(F)	((F)->advmap.cname)
+#define CONDITION_MAP(F)	((F)->advmap.cmap)
+
+/* path PREFIX (addpath rxid NUMBER) */
+#define PATH_ADDPATH_STR_BUFFER PREFIX2STR_BUFFER + 32
+
+enum bgp_path_type {
+	BGP_PATH_SHOW_ALL,
+	BGP_PATH_SHOW_BESTPATH,
+	BGP_PATH_SHOW_MULTIPATH
+};
+
+static inline void bgp_bump_version(struct bgp_dest *dest)
+{
+	dest->version = bgp_table_next_version(bgp_dest_table(dest));
+}
+
+static inline int bgp_fibupd_safi(safi_t safi)
+{
+	if (safi == SAFI_UNICAST || safi == SAFI_MULTICAST
+	    || safi == SAFI_LABELED_UNICAST
+	    || safi == SAFI_FLOWSPEC)
+		return 1;
+	return 0;
+}
+
+/* Flag if the route path's family matches params. */
+static inline bool is_pi_family_matching(struct bgp_path_info *pi,
+					 afi_t afi, safi_t safi)
+{
+	struct bgp_table *table;
+	struct bgp_dest *dest;
+
+	dest = pi->net;
+	if (!dest)
+		return false;
+	table = bgp_dest_table(dest);
+	if (table &&
+	    table->afi == afi &&
+	    table->safi == safi)
+		return true;
+	return false;
+}
+
+static inline void prep_for_rmap_apply(struct bgp_path_info *dst_pi,
+				       struct bgp_path_info_extra *dst_pie,
+				       struct bgp_dest *dest,
+				       struct bgp_path_info *src_pi,
+				       struct peer *peer, struct attr *attr)
+{
+	memset(dst_pi, 0, sizeof(struct bgp_path_info));
+	dst_pi->peer = peer;
+	dst_pi->attr = attr;
+	dst_pi->net = dest;
+	dst_pi->flags = src_pi->flags;
+	dst_pi->type = src_pi->type;
+	dst_pi->sub_type = src_pi->sub_type;
+	dst_pi->mpath = src_pi->mpath;
+	if (src_pi->extra) {
+		memcpy(dst_pie, src_pi->extra,
+		       sizeof(struct bgp_path_info_extra));
+		dst_pi->extra = dst_pie;
+	}
+}
+
+static inline bool bgp_check_advertise(struct bgp *bgp, struct bgp_dest *dest)
+{
+	return (!(BGP_SUPPRESS_FIB_ENABLED(bgp) &&
+		  CHECK_FLAG(dest->flags, BGP_NODE_FIB_INSTALL_PENDING) &&
+		 (!bgp_option_check(BGP_OPT_NO_FIB))));
+}
+
+/*
+ * If we have a fib result and it failed to install( or was withdrawn due
+ * to better admin distance we need to send down the wire a withdrawal.
+ * This function assumes that bgp_check_advertise was already returned
+ * as good to go.
+ */
+static inline bool bgp_check_withdrawal(struct bgp *bgp, struct bgp_dest *dest)
+{
+	struct bgp_path_info *pi, *selected = NULL;
+
+	if (!BGP_SUPPRESS_FIB_ENABLED(bgp))
+		return false;
+
+	for (pi = bgp_dest_get_bgp_path_info(dest); pi; pi = pi->next) {
+		if (CHECK_FLAG(pi->flags, BGP_PATH_SELECTED)) {
+			selected = pi;
+			continue;
+		}
+
+		if (pi->sub_type != BGP_ROUTE_NORMAL)
+			return true;
+	}
+
+	/*
+	 * pi is selected and bgp is dealing with a static route
+	 * ( ie a network statement of some sort ).  FIB installed
+	 * is irrelevant
+	 *
+	 * I am not sure what the above for loop is wanted in this
+	 * manner at this point.  But I do know that if I have
+	 * a static route that is selected and it's the one
+	 * being checked for should I withdrawal we do not
+	 * want to withdraw the route on installation :)
+	 */
+	if (selected && selected->sub_type == BGP_ROUTE_STATIC)
+		return false;
+
+	if (CHECK_FLAG(dest->flags, BGP_NODE_FIB_INSTALLED))
+		return false;
+
+	return true;
+}
+
+/* called before bgp_process() */
+DECLARE_HOOK(bgp_process,
+	     (struct bgp * bgp, afi_t afi, safi_t safi, struct bgp_dest *bn,
+	      struct peer *peer, bool withdraw),
+	     (bgp, afi, safi, bn, peer, withdraw));
+
+/* BGP show options */
+#define BGP_SHOW_OPT_JSON (1 << 0)
+#define BGP_SHOW_OPT_WIDE (1 << 1)
+#define BGP_SHOW_OPT_AFI_ALL (1 << 2)
+#define BGP_SHOW_OPT_AFI_IP (1 << 3)
+#define BGP_SHOW_OPT_AFI_IP6 (1 << 4)
+#define BGP_SHOW_OPT_ESTABLISHED (1 << 5)
+#define BGP_SHOW_OPT_FAILED (1 << 6)
+#define BGP_SHOW_OPT_DETAIL (1 << 7)
+#define BGP_SHOW_OPT_TERSE (1 << 8)
+
+/* Prototypes. */
+extern void bgp_rib_remove(struct bgp_dest *dest, struct bgp_path_info *pi,
+			   struct peer *peer, afi_t afi, safi_t safi);
+extern void bgp_process_queue_init(struct bgp *bgp);
+extern void bgp_route_init(void);
+extern void bgp_route_finish(void);
+extern void bgp_cleanup_routes(struct bgp *);
+extern void bgp_free_aggregate_info(struct bgp_aggregate *aggregate);
+extern void bgp_announce_route(struct peer *peer, afi_t afi, safi_t safi,
+			       bool force);
+extern void bgp_stop_announce_route_timer(struct peer_af *paf);
+extern void bgp_announce_route_all(struct peer *);
+extern void bgp_default_originate(struct peer *, afi_t, safi_t, int);
+extern void bgp_soft_reconfig_table_task_cancel(const struct bgp *bgp,
+						const struct bgp_table *table,
+						const struct peer *peer);
+extern void bgp_soft_reconfig_in(struct peer *, afi_t, safi_t);
+extern void bgp_clear_route(struct peer *, afi_t, safi_t);
+extern void bgp_clear_route_all(struct peer *);
+extern void bgp_clear_adj_in(struct peer *, afi_t, safi_t);
+extern void bgp_clear_stale_route(struct peer *, afi_t, safi_t);
+extern void bgp_set_stale_route(struct peer *peer, afi_t afi, safi_t safi);
+extern bool bgp_outbound_policy_exists(struct peer *, struct bgp_filter *);
+extern bool bgp_inbound_policy_exists(struct peer *, struct bgp_filter *);
+
+extern struct bgp_dest *bgp_afi_node_get(struct bgp_table *table, afi_t afi,
+					 safi_t safi, const struct prefix *p,
+					 struct prefix_rd *prd);
+extern struct bgp_path_info *bgp_path_info_lock(struct bgp_path_info *path);
+extern struct bgp_path_info *bgp_path_info_unlock(struct bgp_path_info *path);
+extern struct bgp_path_info *
+bgp_get_imported_bpi_ultimate(struct bgp_path_info *info);
+extern void bgp_path_info_add(struct bgp_dest *dest, struct bgp_path_info *pi);
+extern void bgp_path_info_extra_free(struct bgp_path_info_extra **extra);
+extern void bgp_path_info_reap(struct bgp_dest *dest, struct bgp_path_info *pi);
+extern void bgp_path_info_delete(struct bgp_dest *dest,
+				 struct bgp_path_info *pi);
+extern struct bgp_path_info_extra *
+bgp_path_info_extra_get(struct bgp_path_info *path);
+extern void bgp_path_info_set_flag(struct bgp_dest *dest,
+				   struct bgp_path_info *path, uint32_t flag);
+extern void bgp_path_info_unset_flag(struct bgp_dest *dest,
+				     struct bgp_path_info *path, uint32_t flag);
+extern void bgp_path_info_path_with_addpath_rx_str(struct bgp_path_info *pi,
+						   char *buf, size_t buf_len);
+
+extern int bgp_nlri_parse_ip(struct peer *, struct attr *, struct bgp_nlri *);
+
+extern bool bgp_maximum_prefix_overflow(struct peer *, afi_t, safi_t, int);
+
+extern void bgp_redistribute_add(struct bgp *bgp, struct prefix *p,
+				 const union g_addr *nexthop, ifindex_t ifindex,
+				 enum nexthop_types_t nhtype, uint8_t distance,
+				 enum blackhole_type bhtype, uint32_t metric,
+				 uint8_t type, unsigned short instance,
+				 route_tag_t tag);
+extern void bgp_redistribute_delete(struct bgp *, struct prefix *, uint8_t,
+				    unsigned short);
+extern void bgp_redistribute_withdraw(struct bgp *, afi_t, int, unsigned short);
+
+extern void bgp_static_add(struct bgp *);
+extern void bgp_static_delete(struct bgp *);
+extern void bgp_static_redo_import_check(struct bgp *);
+extern void bgp_purge_static_redist_routes(struct bgp *bgp);
+extern void bgp_static_update(struct bgp *bgp, const struct prefix *p,
+			      struct bgp_static *s, afi_t afi, safi_t safi);
+extern void bgp_static_withdraw(struct bgp *bgp, const struct prefix *p,
+				afi_t afi, safi_t safi);
+
+extern int bgp_static_set_safi(afi_t afi, safi_t safi, struct vty *vty,
+			       const char *, const char *, const char *,
+			       const char *, int, const char *, const char *,
+			       const char *, const char *);
+
+extern int bgp_static_unset_safi(afi_t afi, safi_t safi, struct vty *,
+				 const char *, const char *, const char *, int,
+				 const char *, const char *, const char *);
+
+/* this is primarily for MPLS-VPN */
+extern int bgp_update(struct peer *peer, const struct prefix *p,
+		      uint32_t addpath_id, struct attr *attr,
+		      afi_t afi, safi_t safi, int type, int sub_type,
+		      struct prefix_rd *prd, mpls_label_t *label,
+		      uint32_t num_labels, int soft_reconfig,
+		      struct bgp_route_evpn *evpn);
+extern int bgp_withdraw(struct peer *peer, const struct prefix *p,
+			uint32_t addpath_id, struct attr *attr, afi_t afi,
+			safi_t safi, int type, int sub_type,
+			struct prefix_rd *prd, mpls_label_t *label,
+			uint32_t num_labels, struct bgp_route_evpn *evpn);
+
+/* for bgp_nexthop and bgp_damp */
+extern void bgp_process(struct bgp *, struct bgp_dest *, afi_t, safi_t);
+
+/*
+ * Add an end-of-initial-update marker to the process queue. This is just a
+ * queue element with NULL bgp node.
+ */
+extern void bgp_add_eoiu_mark(struct bgp *);
+extern void bgp_config_write_table_map(struct vty *, struct bgp *, afi_t,
+				       safi_t);
+extern void bgp_config_write_network(struct vty *, struct bgp *, afi_t, safi_t);
+extern void bgp_config_write_distance(struct vty *, struct bgp *, afi_t,
+				      safi_t);
+
+extern void bgp_aggregate_delete(struct bgp *bgp, const struct prefix *p,
+				 afi_t afi, safi_t safi,
+				 struct bgp_aggregate *aggregate);
+extern void bgp_aggregate_route(struct bgp *bgp, const struct prefix *p,
+				afi_t afi, safi_t safi,
+				struct bgp_aggregate *aggregate);
+extern void bgp_aggregate_increment(struct bgp *bgp, const struct prefix *p,
+				    struct bgp_path_info *path, afi_t afi,
+				    safi_t safi);
+extern void bgp_aggregate_decrement(struct bgp *bgp, const struct prefix *p,
+				    struct bgp_path_info *path, afi_t afi,
+				    safi_t safi);
+
+extern uint8_t bgp_distance_apply(const struct prefix *p,
+				  struct bgp_path_info *path, afi_t afi,
+				  safi_t safi, struct bgp *bgp);
+
+extern afi_t bgp_node_afi(struct vty *);
+extern safi_t bgp_node_safi(struct vty *);
+
+extern struct bgp_path_info *info_make(int type, int sub_type,
+				       unsigned short instance,
+				       struct peer *peer, struct attr *attr,
+				       struct bgp_dest *dest);
+
+extern void route_vty_out(struct vty *vty, const struct prefix *p,
+			  struct bgp_path_info *path, int display, safi_t safi,
+			  json_object *json_paths, bool wide);
+extern void route_vty_out_tag(struct vty *vty, const struct prefix *p,
+			      struct bgp_path_info *path, int display,
+			      safi_t safi, json_object *json);
+extern void route_vty_out_tmp(struct vty *vty, struct bgp_dest *dest,
+			      const struct prefix *p, struct attr *attr,
+			      safi_t safi, bool use_json, json_object *json_ar,
+			      bool wide);
+extern void route_vty_out_overlay(struct vty *vty, const struct prefix *p,
+				  struct bgp_path_info *path, int display,
+				  json_object *json);
+
+extern void bgp_notify_conditional_adv_scanner(struct update_subgroup *subgrp);
+
+extern void subgroup_process_announce_selected(struct update_subgroup *subgrp,
+					       struct bgp_path_info *selected,
+					       struct bgp_dest *dest,
+					       uint32_t addpath_tx_id);
+
+extern bool subgroup_announce_check(struct bgp_dest *dest,
+				    struct bgp_path_info *pi,
+				    struct update_subgroup *subgrp,
+				    const struct prefix *p, struct attr *attr,
+				    struct attr *post_attr);
+
+extern void bgp_peer_clear_node_queue_drain_immediate(struct peer *peer);
+extern void bgp_process_queues_drain_immediate(void);
+
+/* for encap/vpn */
+extern struct bgp_dest *bgp_afi_node_lookup(struct bgp_table *table, afi_t afi,
+					    safi_t safi, const struct prefix *p,
+					    struct prefix_rd *prd);
+extern void bgp_path_info_restore(struct bgp_dest *dest,
+				  struct bgp_path_info *path);
+
+extern int bgp_path_info_cmp_compatible(struct bgp *bgp,
+					struct bgp_path_info *new,
+					struct bgp_path_info *exist,
+					char *pfx_buf, afi_t afi, safi_t safi,
+					enum bgp_path_selection_reason *reason);
+extern void bgp_attr_add_llgr_community(struct attr *attr);
+extern void bgp_attr_add_gshut_community(struct attr *attr);
+
+extern void bgp_best_selection(struct bgp *bgp, struct bgp_dest *dest,
+			       struct bgp_maxpaths_cfg *mpath_cfg,
+			       struct bgp_path_info_pair *result, afi_t afi,
+			       safi_t safi);
+extern void bgp_zebra_clear_route_change_flags(struct bgp_dest *dest);
+extern bool bgp_zebra_has_route_changed(struct bgp_path_info *selected);
+
+extern void route_vty_out_detail_header(struct vty *vty, struct bgp *bgp,
+					struct bgp_dest *dest,
+					const struct prefix_rd *prd, afi_t afi,
+					safi_t safi, json_object *json);
+extern void route_vty_out_detail(struct vty *vty, struct bgp *bgp,
+				 struct bgp_dest *bn,
+				 struct bgp_path_info *path, afi_t afi,
+				 safi_t safi, enum rpki_states,
+				 json_object *json_paths);
+extern int bgp_show_table_rd(struct vty *vty, struct bgp *bgp, safi_t safi,
+			     struct bgp_table *table, struct prefix_rd *prd,
+			     enum bgp_show_type type, void *output_arg,
+			     bool use_json);
+extern void bgp_best_path_select_defer(struct bgp *bgp, afi_t afi, safi_t safi);
+extern bool bgp_update_martian_nexthop(struct bgp *bgp, afi_t afi, safi_t safi,
+				       uint8_t type, uint8_t stype,
+				       struct attr *attr, struct bgp_dest *dest);
+extern int bgp_evpn_path_info_cmp(struct bgp *bgp, struct bgp_path_info *new,
+			     struct bgp_path_info *exist, int *paths_eq);
+extern void bgp_aggregate_toggle_suppressed(struct bgp_aggregate *aggregate,
+					    struct bgp *bgp,
+					    const struct prefix *p, afi_t afi,
+					    safi_t safi, bool suppress);
+extern void subgroup_announce_reset_nhop(uint8_t family, struct attr *attr);
+const char *
+bgp_path_selection_reason2str(enum bgp_path_selection_reason reason);
+extern bool bgp_addpath_encode_rx(struct peer *peer, afi_t afi, safi_t safi);
+#endif /* _QUAGGA_BGP_ROUTE_H */