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1d309c4ce6
Implicit paddings have undefined values in C. We want the eattr blocks to be comparable by memcmp and eattrs settable directly by structrure literals. This check ensures that all paddings in eattr and bval are explicit and therefore zeroed in all literals.
111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
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* BIRD Internet Routing Daemon -- Internal Data Types
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*
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* (c) 2022 Maria Matejka <mq@jmq.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_TYPE_H_
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#define _BIRD_TYPE_H_
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#include "lib/birdlib.h"
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#include "lib/attrs.h"
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union bval {
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#define BVAL_ITEMS \
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struct { \
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u32 data; /* Integer type inherited from eattrs */ \
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PADDING(data, 0, 4); /* Must be padded on 64-bits */ \
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}; \
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struct { \
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u32 i; /* Integer type inherited from filters */ \
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PADDING(i, 0, 4); /* Must be padded on 64-bits */ \
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}; \
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const struct adata *ptr; /* Generic attribute data inherited from eattrs */ \
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const struct adata *ad; /* Generic attribute data inherited from filters */ \
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BVAL_ITEMS;
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};
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union bval_long {
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union bval bval; /* For direct assignments */
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BVAL_ITEMS; /* For item-wise access */
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u64 ec;
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lcomm lc;
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ip_addr ip;
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const net_addr *net;
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const char *s;
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const struct f_tree *t;
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const struct f_trie *ti;
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const struct f_path_mask *path_mask;
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struct f_path_mask_item pmi;
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};
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/* Internal types */
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enum btype {
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/* Nothing. Simply nothing. */
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T_VOID = 0,
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/* Something but inaccessible. */
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T_OPAQUE = 0x02, /* Opaque byte string (not filterable) */
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T_IFACE = 0x0c, /* Pointer to an interface (inside adata) */
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/* Types shared with eattrs */
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T_INT = 0x01, /* 32-bit unsigned integer number */
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T_IP = 0x04, /* IP address */
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T_QUAD = 0x05, /* Router ID (IPv4 address) */
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T_PATH = 0x06, /* BGP AS path (encoding per RFC 1771:4.3) */
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T_CLIST = 0x0a, /* Set of u32's (e.g., a community list) */
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T_ECLIST = 0x0e, /* Set of pairs of u32's - ext. community list */
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T_LCLIST = 0x08, /* Set of triplets of u32's - large community list */
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T_ENUM_BGP_ORIGIN = 0x11, /* BGP Origin enum */
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T_ENUM_RA_PREFERENCE = 0x13, /* RA Preference enum */
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#define EAF_TYPE__MAX 0x1f
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#define EAF_EMBEDDED 0x01 /* Data stored in eattr.u.data (part of type spec) */
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/* Otherwise, attribute data is adata */
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/* Other user visible types which fit in int */
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T_BOOL = 0xa0,
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T_PAIR = 0xa4, /* Notice that pair is stored as integer: first << 16 | second */
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/* Put enumerational types in 0x20..0x3f range */
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T_ENUM_LO = 0x10,
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T_ENUM_HI = 0x3f,
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T_ENUM_RTS = 0x31,
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T_ENUM_SCOPE = 0x33,
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T_ENUM_RTC = 0x35,
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T_ENUM_RTD = 0x37,
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T_ENUM_ROA = 0x39,
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T_ENUM_NETTYPE = 0x3b,
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T_ENUM_AF = 0x3d,
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/* new enums go here */
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#define T_ENUM T_ENUM_LO ... T_ENUM_HI
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/* Bigger ones */
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T_NET = 0xb0,
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T_STRING = 0xb4,
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T_PATH_MASK = 0xb8, /* mask for BGP path */
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T_EC = 0xbc, /* Extended community value, u64 */
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T_LC = 0xc0, /* Large community value, lcomm */
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T_RD = 0xc4, /* Route distinguisher for VPN addresses */
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T_PATH_MASK_ITEM = 0xc8, /* Path mask item for path mask constructors */
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T_SET = 0x80,
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T_PREFIX_SET = 0x84,
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} PACKED;
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typedef enum btype btype;
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STATIC_ASSERT(sizeof(btype) == sizeof(byte));
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#endif
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