Adding upstream version 9.1.upstream/9.1

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

1 files changed, 123 insertions, 0 deletions

diff --git a/bgpd/bgp_community.h b/bgpd/bgp_community.h
new file mode 100644
index 0000000..7c7e7af
--- /dev/null
+++ b/bgpd/bgp_community.h
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Community attribute related functions.
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ */
+
+#ifndef _QUAGGA_BGP_COMMUNITY_H
+#define _QUAGGA_BGP_COMMUNITY_H
+
+#include "lib/json.h"
+#include "bgpd/bgp_route.h"
+#include "bgpd/bgp_attr.h"
+
+/* Communities attribute.  */
+struct community {
+	/* Reference count of communities value.  */
+	unsigned long refcnt;
+
+	/* Communities value size.  */
+	int size;
+
+	/* Communities value.  */
+	uint32_t *val;
+
+	/* Communities as a json object */
+	json_object *json;
+
+	/* String of community attribute.  This sring is used by vty output
+	   and expanded community-list for regular expression match.  */
+	char *str;
+};
+
+/* Well-known communities value.  */
+#define COMMUNITY_GSHUT                         0xFFFF0000
+#define COMMUNITY_ACCEPT_OWN                    0xFFFF0001
+#define COMMUNITY_ROUTE_FILTER_TRANSLATED_v4    0xFFFF0002
+#define COMMUNITY_ROUTE_FILTER_v4               0xFFFF0003
+#define COMMUNITY_ROUTE_FILTER_TRANSLATED_v6    0xFFFF0004
+#define COMMUNITY_ROUTE_FILTER_v6               0xFFFF0005
+#define COMMUNITY_LLGR_STALE                    0xFFFF0006
+#define COMMUNITY_NO_LLGR                       0xFFFF0007
+#define COMMUNITY_ACCEPT_OWN_NEXTHOP            0xFFFF0008
+#define COMMUNITY_BLACKHOLE                     0xFFFF029A
+#define COMMUNITY_NO_EXPORT                     0xFFFFFF01
+#define COMMUNITY_NO_ADVERTISE                  0xFFFFFF02
+#define COMMUNITY_NO_EXPORT_SUBCONFED           0xFFFFFF03
+#define COMMUNITY_LOCAL_AS                      0xFFFFFF03
+#define COMMUNITY_NO_PEER                       0xFFFFFF04
+
+#define COMMUNITY_SIZE 4
+
+/* Macros of community attribute.  */
+#define com_length(X)    ((X)->size * COMMUNITY_SIZE)
+#define com_lastval(X)   ((X)->val + (X)->size - 1)
+#define com_nthval(X,n)  ((X)->val + (n))
+
+/* Prototypes of communities attribute functions.  */
+extern void community_init(void);
+extern void community_finish(void);
+extern void community_free(struct community **comm);
+extern struct community *community_uniq_sort(struct community *com);
+extern struct community *community_parse(uint32_t *pnt, unsigned short length);
+extern struct community *community_intern(struct community *com);
+extern void community_unintern(struct community **com);
+extern char *community_str(struct community *com, bool make_json,
+			   bool translate_alias);
+extern unsigned int community_hash_make(const struct community *com);
+extern struct community *community_str2com(const char *str);
+extern bool community_match(const struct community *com1,
+			    const struct community *com2);
+extern bool community_cmp(const struct community *c1,
+			  const struct community *c2);
+extern struct community *community_merge(struct community *com1,
+					 struct community *com2);
+extern struct community *community_delete(struct community *com1,
+					  struct community *com2);
+extern struct community *community_dup(struct community *com);
+extern bool community_include(struct community *com, uint32_t val);
+extern void community_add_val(struct community *com, uint32_t val);
+extern void community_del_val(struct community *com, uint32_t *val);
+extern unsigned long community_count(void);
+extern struct hash *community_hash(void);
+extern uint32_t community_val_get(struct community *com, int i);
+extern void bgp_compute_aggregate_community(struct bgp_aggregate *aggregate,
+					    struct community *community);
+
+extern void bgp_compute_aggregate_community_val(
+					       struct bgp_aggregate *aggregate);
+extern void bgp_compute_aggregate_community_hash(
+						struct bgp_aggregate *aggregate,
+						struct community *community);
+extern void bgp_remove_community_from_aggregate(struct bgp_aggregate *aggregate,
+						struct community *community);
+extern void bgp_remove_comm_from_aggregate_hash(struct bgp_aggregate *aggregate,
+						struct community *community);
+extern void bgp_aggr_community_remove(void *arg);
+
+/* This implies that when propagating routes into a VRF, the ACCEPT_OWN
+ * community SHOULD NOT be propagated.
+ */
+static inline void community_strip_accept_own(struct attr *attr)
+{
+	struct community *old_com = bgp_attr_get_community(attr);
+	struct community *new_com = NULL;
+	uint32_t val = COMMUNITY_ACCEPT_OWN;
+
+	if (old_com && community_include(old_com, val)) {
+		new_com = community_dup(old_com);
+		val = htonl(val);
+		community_del_val(new_com, &val);
+
+		if (!old_com->refcnt)
+			community_free(&old_com);
+
+		if (!new_com->size) {
+			community_free(&new_com);
+			bgp_attr_set_community(attr, NULL);
+		} else {
+			bgp_attr_set_community(attr, new_com);
+		}
+	}
+}
+
+#endif /* _QUAGGA_BGP_COMMUNITY_H */