#ifndef _BIRD_ATTRS_H_
#define _BIRD_ATTRS_H_
+#include <stdint.h>
+#include "lib/unaligned.h"
+#include "nest/route.h"
+
+
/* a-path.c */
#define AS_PATH_SET 1 /* Types of path segments */
#define AS_PATH_SEQUENCE 2
+#define AS_PATH_CONFED_SEQUENCE 3
+#define AS_PATH_CONFED_SET 4
#define AS_PATH_MAXLEN 10000
* to 16bit slot (like in 16bit AS_PATH). See RFC 4893 for details
*/
-struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, u32 as);
-int as_path_convert_to_old(struct adata *path, byte *dst, int *new_used);
-int as_path_convert_to_new(struct adata *path, byte *dst, int req_as);
-void as_path_format(struct adata *path, byte *buf, unsigned int size);
-int as_path_getlen(struct adata *path);
-int as_path_get_first(struct adata *path, u32 *orig_as);
-int as_path_get_last(struct adata *path, u32 *last_as);
-int as_path_is_member(struct adata *path, u32 as);
+struct f_val;
+struct f_tree;
+
+int as_path_valid(byte *data, uint len, int bs, int sets, int confed, char *err, uint elen);
+int as_path_16to32(byte *dst, const byte *src, uint len);
+int as_path_32to16(byte *dst, const byte *src, uint len);
+int as_path_contains_as4(const struct adata *path);
+int as_path_contains_confed(const struct adata *path);
+struct adata *as_path_strip_confed(struct linpool *pool, const struct adata *op);
+struct adata *as_path_prepend2(struct linpool *pool, const struct adata *op, int seq, u32 as);
+struct adata *as_path_to_old(struct linpool *pool, const struct adata *path);
+struct adata *as_path_cut(struct linpool *pool, const struct adata *path, uint num);
+const struct adata *as_path_merge(struct linpool *pool, const struct adata *p1, const struct adata *p2);
+void as_path_format(const struct adata *path, byte *buf, uint size);
+int as_path_getlen(const struct adata *path);
+int as_path_getlen_int(const struct adata *path, int bs);
+int as_path_get_first(const struct adata *path, u32 *orig_as);
+int as_path_get_first_regular(const struct adata *path, u32 *last_as);
+int as_path_get_last(const struct adata *path, u32 *last_as);
+u32 as_path_get_last_nonaggregated(const struct adata *path);
+int as_path_contains(const struct adata *path, u32 as, int min);
+int as_path_match_set(const struct adata *path, const struct f_tree *set);
+const struct adata *as_path_filter(struct linpool *pool, const struct adata *path, const struct f_val *set, int pos);
+
+static inline struct adata *as_path_prepend(struct linpool *pool, const struct adata *path, u32 as)
+{ return as_path_prepend2(pool, path, AS_PATH_SEQUENCE, as); }
+
+#define PM_ASN 0
+#define PM_QUESTION 1
+#define PM_ASTERISK 2
+#define PM_ASN_EXPR 3
+#define PM_ASN_RANGE 4
+#define PM_ASN_SET 5
+#define PM_LOOP 6
+
+struct f_path_mask_item {
+ union {
+ u32 asn; /* PM_ASN */
+ const struct f_line *expr; /* PM_ASN_EXPR */
+ const struct f_tree *set; /* PM_ASN_SET */
+ struct { /* PM_ASN_RANGE */
+ u32 from;
+ u32 to;
+ };
+ };
+ int kind;
+};
struct f_path_mask {
- struct f_path_mask *next;
- u32 val;
- int any;
+ uint len;
+ struct f_path_mask_item item[0];
};
-// #define PM_ANY -1
+int as_path_match(const struct adata *path, const struct f_path_mask *mask);
+
+
+/* Counterparts to appropriate as_path_* functions */
+
+static inline int
+aggregator_16to32(byte *dst, const byte *src)
+{
+ put_u32(dst, get_u16(src));
+ memcpy(dst+4, src+2, 4);
+ return 8;
+}
+
+static inline int
+aggregator_32to16(byte *dst, const byte *src)
+{
+ put_u16(dst, get_u32(src));
+ memcpy(dst+2, src+4, 4);
+ return 6;
+}
+
+static inline int
+aggregator_contains_as4(const struct adata *a)
+{
+ return get_u32(a->data) > 0xFFFF;
+}
+
+static inline struct adata *
+aggregator_to_old(struct linpool *pool, const struct adata *a)
+{
+ struct adata *d = lp_alloc_adata(pool, 8);
+ put_u32(d->data, AS_TRANS);
+ memcpy(d->data + 4, a->data + 4, 4);
+ return d;
+}
-int as_path_match(struct adata *path, struct f_path_mask *mask);
/* a-set.c */
-void int_set_format(struct adata *set, byte *buf, unsigned int size);
-struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
-int int_set_contains(struct adata *list, u32 val);
-struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
-static inline int int_set_get_size(struct adata *list)
+/* Extended Community subtypes (kinds) */
+enum ec_subtype {
+ EC_RT = 0x0002,
+ EC_RO = 0x0003,
+ EC_GENERIC = 0xFFFF,
+};
+
+static inline const char *ec_subtype_str(const enum ec_subtype ecs) {
+ switch (ecs) {
+ case EC_RT: return "rt";
+ case EC_RO: return "ro";
+ default: return NULL;
+ }
+}
+
+/* Transitive bit (for first u32 half of EC) */
+#define EC_TBIT 0x40000000
+
+#define ECOMM_LENGTH 8
+
+static inline int int_set_get_size(const struct adata *list)
{ return list->length / 4; }
+static inline int ec_set_get_size(const struct adata *list)
+{ return list->length / 8; }
+
+static inline int lc_set_get_size(const struct adata *list)
+{ return list->length / 12; }
+
+static inline u32 *int_set_get_data(const struct adata *list)
+{ return (u32 *) list->data; }
+
+static inline u32 ec_hi(u64 ec) { return ec >> 32; }
+static inline u32 ec_lo(u64 ec) { return ec; }
+static inline u64 ec_get(const u32 *l, int i)
+{ return (((u64) l[i]) << 32) | l[i+1]; }
+
+/* RFC 4360 3.1. Two-Octet AS Specific Extended Community */
+static inline u64 ec_as2(enum ec_subtype kind, u64 key, u64 val)
+{ return (((u64) kind | 0x0000) << 48) | (key << 32) | val; }
+
+/* RFC 5668 4-Octet AS Specific BGP Extended Community */
+static inline u64 ec_as4(enum ec_subtype kind, u64 key, u64 val)
+{ return (((u64) kind | 0x0200) << 48) | (key << 16) | val; }
+
+/* RFC 4360 3.2. IPv4 Address Specific Extended Community */
+static inline u64 ec_ip4(enum ec_subtype kind, u64 key, u64 val)
+{ return (((u64) kind | 0x0100) << 48) | (key << 16) | val; }
+
+static inline u64 ec_generic(u64 key, u64 val)
+{ return (key << 32) | val; }
+
+/* Large community value */
+typedef struct lcomm {
+ u32 asn;
+ u32 ldp1;
+ u32 ldp2;
+} lcomm;
+
+#define LCOMM_LENGTH 12
+
+static inline lcomm lc_get(const u32 *l, int i)
+{ return (lcomm) { l[i], l[i+1], l[i+2] }; }
+
+static inline void lc_put(u32 *l, lcomm v)
+{ l[0] = v.asn; l[1] = v.ldp1; l[2] = v.ldp2; }
+
+static inline int lc_match(const u32 *l, int i, lcomm v)
+{ return (l[i] == v.asn && l[i+1] == v.ldp1 && l[i+2] == v.ldp2); }
+
+static inline u32 *lc_copy(u32 *dst, const u32 *src)
+{ memcpy(dst, src, LCOMM_LENGTH); return dst + 3; }
+
+
+int int_set_format(const struct adata *set, int way, int from, byte *buf, uint size);
+int ec_format(byte *buf, u64 ec);
+int ec_set_format(const struct adata *set, int from, byte *buf, uint size);
+int lc_format(byte *buf, lcomm lc);
+int lc_set_format(const struct adata *set, int from, byte *buf, uint size);
+int int_set_contains(const struct adata *list, u32 val);
+int ec_set_contains(const struct adata *list, u64 val);
+int lc_set_contains(const struct adata *list, lcomm val);
+const struct adata *int_set_prepend(struct linpool *pool, const struct adata *list, u32 val);
+const struct adata *int_set_add(struct linpool *pool, const struct adata *list, u32 val);
+const struct adata *ec_set_add(struct linpool *pool, const struct adata *list, u64 val);
+const struct adata *lc_set_add(struct linpool *pool, const struct adata *list, lcomm val);
+const struct adata *int_set_del(struct linpool *pool, const struct adata *list, u32 val);
+const struct adata *ec_set_del(struct linpool *pool, const struct adata *list, u64 val);
+const struct adata *lc_set_del(struct linpool *pool, const struct adata *list, lcomm val);
+const struct adata *int_set_union(struct linpool *pool, const struct adata *l1, const struct adata *l2);
+const struct adata *ec_set_union(struct linpool *pool, const struct adata *l1, const struct adata *l2);
+const struct adata *lc_set_union(struct linpool *pool, const struct adata *l1, const struct adata *l2);
+
+struct adata *ec_set_del_nontrans(struct linpool *pool, const struct adata *set);
+struct adata *int_set_sort(struct linpool *pool, const struct adata *src);
+struct adata *ec_set_sort(struct linpool *pool, const struct adata *src);
+struct adata *lc_set_sort(struct linpool *pool, const struct adata *src);
+int int_set_min(const struct adata *list, u32 *val);
+int ec_set_min(const struct adata *list, u64 *val);
+int lc_set_min(const struct adata *list, lcomm *val);
+int int_set_max(const struct adata *list, u32 *val);
+int ec_set_max(const struct adata *list, u64 *val);
+int lc_set_max(const struct adata *list, lcomm *val);
+
+void ec_set_sort_x(struct adata *set); /* Sort in place */
+
#endif
projects / thirdparty / bird.git / blobdiff