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iof-bird-daemon / nest / attrs.h @ e04555c0

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/*
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 *        BIRD Internet Routing Daemon -- Attribute Operations
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 *
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 *        (c) 2000 Martin Mares <mj@ucw.cz>
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 *
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 *        Can be freely distributed and used under the terms of the GNU GPL.
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 */
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#ifndef _BIRD_ATTRS_H_
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#define _BIRD_ATTRS_H_
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#include <stdint.h>
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/* a-path.c */
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#define AS_PATH_SET                1        /* Types of path segments */
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#define AS_PATH_SEQUENCE        2
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#define AS_PATH_CONFED_SEQUENCE        3
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#define AS_PATH_CONFED_SET        4
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#define AS_PATH_MAXLEN                10000
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#define AS_TRANS                23456
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/* AS_TRANS is used when we need to store 32bit ASN larger than 0xFFFF
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 * to 16bit slot (like in 16bit AS_PATH). See RFC 4893 for details
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 */
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struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, u32 as);
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int as_path_convert_to_old(struct adata *path, byte *dst, int *new_used);
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int as_path_convert_to_new(struct adata *path, byte *dst, int req_as);
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void as_path_format(struct adata *path, byte *buf, unsigned int size);
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int as_path_getlen(struct adata *path);
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int as_path_getlen_int(struct adata *path, int bs);
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int as_path_get_first(struct adata *path, u32 *orig_as);
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int as_path_get_last(struct adata *path, u32 *last_as);
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int as_path_is_member(struct adata *path, u32 as);
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#define PM_ASN                0
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#define PM_QUESTION        1
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#define PM_ASTERISK        2
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#define PM_ASN_EXPR        3
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struct f_path_mask {
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  struct f_path_mask *next;
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  int kind;
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  uintptr_t val;
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};
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int as_path_match(struct adata *path, struct f_path_mask *mask);
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/* a-set.c */
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void int_set_format(struct adata *set, int way, byte *buf, unsigned int size);
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struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
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int int_set_contains(struct adata *list, u32 val);
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struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
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static inline int int_set_get_size(struct adata *list)
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{ return list->length / 4; }
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#endif