nest/attrs.h

   1 /*
   2  *      BIRD Internet Routing Daemon -- Attribute Operations
   3  *
   4  *      (c) 2000 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #ifndef _BIRD_ATTRS_H_
  10 #define _BIRD_ATTRS_H_
  11
  12 /* a-path.c */
  13
  14 #define AS_PATH_SET             1       /* Types of path segments */
  15 #define AS_PATH_SEQUENCE        2
  16 #define AS_PATH_CONFED_SEQUENCE 3
  17 #define AS_PATH_CONFED_SET      4
  18
  19 #define AS_PATH_MAXLEN          10000
  20
  21 #define AS_TRANS                23456
  22 /* AS_TRANS is used when we need to store 32bit ASN larger than 0xFFFF
  23  * to 16bit slot (like in 16bit AS_PATH). See RFC 4893 for details
  24  */
  25
  26 struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, u32 as);
  27 int as_path_convert_to_old(struct adata *path, byte *dst, int *new_used);
  28 int as_path_convert_to_new(struct adata *path, byte *dst, int req_as);
  29 void as_path_format(struct adata *path, byte *buf, unsigned int size);
  30 int as_path_getlen(struct adata *path);
  31 int as_path_get_first(struct adata *path, u32 *orig_as);
  32 int as_path_get_last(struct adata *path, u32 *last_as);
  33 int as_path_is_member(struct adata *path, u32 as);
  34
  35 #define PM_ASN          0
  36 #define PM_QUESTION     1
  37 #define PM_ASTERISK     2
  38 #define PM_ASN_EXPR     3
  39
  40 struct f_path_mask {
  41   struct f_path_mask *next;
  42   int kind;
  43   uintptr_t val;
  44 };
  45
  46 int as_path_match(struct adata *path, struct f_path_mask *mask);
  47
  48 /* a-set.c */
  49
  50 void int_set_format(struct adata *set, int way, byte *buf, unsigned int size);
  51 struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
  52 int int_set_contains(struct adata *list, u32 val);
  53 struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
  54
  55 static inline int int_set_get_size(struct adata *list)
  56 { return list->length / 4; }
  57
  58 #endif