Annotation of embedaddon/bird/nest/attrs.h, revision 1.1.1.1
1.1 misho 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: #include <stdint.h>
13:
14: /* a-path.c */
15:
16: #define AS_PATH_SET 1 /* Types of path segments */
17: #define AS_PATH_SEQUENCE 2
18: #define AS_PATH_CONFED_SEQUENCE 3
19: #define AS_PATH_CONFED_SET 4
20:
21: #define AS_PATH_MAXLEN 10000
22:
23: #define AS_TRANS 23456
24: /* AS_TRANS is used when we need to store 32bit ASN larger than 0xFFFF
25: * to 16bit slot (like in 16bit AS_PATH). See RFC 4893 for details
26: */
27:
28: struct f_tree;
29:
30: struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, u32 as);
31: int as_path_convert_to_old(struct adata *path, byte *dst, int *new_used);
32: int as_path_convert_to_new(struct adata *path, byte *dst, int req_as);
33: void as_path_format(struct adata *path, byte *buf, uint size);
34: int as_path_getlen(struct adata *path);
35: int as_path_getlen_int(struct adata *path, int bs);
36: int as_path_get_first(struct adata *path, u32 *orig_as);
37: int as_path_get_last(struct adata *path, u32 *last_as);
38: u32 as_path_get_last_nonaggregated(struct adata *path);
39: int as_path_contains(struct adata *path, u32 as, int min);
40: int as_path_match_set(struct adata *path, struct f_tree *set);
41: struct adata *as_path_filter(struct linpool *pool, struct adata *path, struct f_tree *set, u32 key, int pos);
42:
43:
44: #define PM_ASN 0
45: #define PM_QUESTION 1
46: #define PM_ASTERISK 2
47: #define PM_ASN_EXPR 3
48: #define PM_ASN_RANGE 4
49:
50: struct f_path_mask {
51: struct f_path_mask *next;
52: int kind;
53: uintptr_t val;
54: uintptr_t val2;
55: };
56:
57: int as_path_match(struct adata *path, struct f_path_mask *mask);
58:
59: /* a-set.c */
60:
61:
62: /* Extended Community subtypes (kinds) */
63: #define EC_RT 0x0002
64: #define EC_RO 0x0003
65:
66: #define EC_GENERIC 0xFFFF
67:
68: /* Transitive bit (for first u32 half of EC) */
69: #define EC_TBIT 0x40000000
70:
71: #define ECOMM_LENGTH 8
72:
73: static inline int int_set_get_size(struct adata *list)
74: { return list->length / 4; }
75:
76: static inline int ec_set_get_size(struct adata *list)
77: { return list->length / 8; }
78:
79: static inline int lc_set_get_size(struct adata *list)
80: { return list->length / 12; }
81:
82: static inline u32 *int_set_get_data(struct adata *list)
83: { return (u32 *) list->data; }
84:
85: static inline u32 ec_hi(u64 ec) { return ec >> 32; }
86: static inline u32 ec_lo(u64 ec) { return ec; }
87: static inline u64 ec_get(const u32 *l, int i)
88: { return (((u64) l[i]) << 32) | l[i+1]; }
89:
90: /* RFC 4360 3.1. Two-Octet AS Specific Extended Community */
91: static inline u64 ec_as2(u64 kind, u64 key, u64 val)
92: { return ((kind | 0x0000) << 48) | (key << 32) | val; }
93:
94: /* RFC 5668 4-Octet AS Specific BGP Extended Community */
95: static inline u64 ec_as4(u64 kind, u64 key, u64 val)
96: { return ((kind | 0x0200) << 48) | (key << 16) | val; }
97:
98: /* RFC 4360 3.2. IPv4 Address Specific Extended Community */
99: static inline u64 ec_ip4(u64 kind, u64 key, u64 val)
100: { return ((kind | 0x0100) << 48) | (key << 16) | val; }
101:
102: static inline u64 ec_generic(u64 key, u64 val)
103: { return (key << 32) | val; }
104:
105: /* Large community value */
106: typedef struct lcomm {
107: u32 asn;
108: u32 ldp1;
109: u32 ldp2;
110: } lcomm;
111:
112: #define LCOMM_LENGTH 12
113:
114: static inline lcomm lc_get(const u32 *l, int i)
115: { return (lcomm) { l[i], l[i+1], l[i+2] }; }
116:
117: static inline void lc_put(u32 *l, lcomm v)
118: { l[0] = v.asn; l[1] = v.ldp1; l[2] = v.ldp2; }
119:
120: static inline int lc_match(const u32 *l, int i, lcomm v)
121: { return (l[i] == v.asn && l[i+1] == v.ldp1 && l[i+2] == v.ldp2); }
122:
123: static inline u32 *lc_copy(u32 *dst, const u32 *src)
124: { memcpy(dst, src, LCOMM_LENGTH); return dst + 3; }
125:
126:
127: int int_set_format(struct adata *set, int way, int from, byte *buf, uint size);
128: int ec_format(byte *buf, u64 ec);
129: int ec_set_format(struct adata *set, int from, byte *buf, uint size);
130: int lc_format(byte *buf, lcomm lc);
131: int lc_set_format(struct adata *set, int from, byte *buf, uint size);
132: int int_set_contains(struct adata *list, u32 val);
133: int ec_set_contains(struct adata *list, u64 val);
134: int lc_set_contains(struct adata *list, lcomm val);
135: struct adata *int_set_prepend(struct linpool *pool, struct adata *list, u32 val);
136: struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
137: struct adata *ec_set_add(struct linpool *pool, struct adata *list, u64 val);
138: struct adata *lc_set_add(struct linpool *pool, struct adata *list, lcomm val);
139: struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
140: struct adata *ec_set_del(struct linpool *pool, struct adata *list, u64 val);
141: struct adata *lc_set_del(struct linpool *pool, struct adata *list, lcomm val);
142: struct adata *int_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
143: struct adata *ec_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
144: struct adata *lc_set_union(struct linpool *pool, struct adata *l1, struct adata *l2);
145:
146:
147: #endif
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