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Nest: Make f_val and eattr binary compatible.

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This will help merging them in future commits.
This commit is contained in:
Jan Maria Matejka 2018-07-03 15:31:41 +02:00
parent 8b0a793042
commit ef9e384852
4 changed files with 45 additions and 28 deletions
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9
filter/filter.h
View File

@ -170,7 +170,7 @@ struct f_prefix {
struct f_val {
enum f_type type; /* T_* */
union {
uint i;
u32 i;
u64 ec;
lcomm lc;
ip_addr ip;
@ -183,6 +183,13 @@ struct f_val {
} val;
};
/* To allow direct copying between eattrs and f_val. */
union f_val_eattr {
struct f_val f;
struct eattr e;
};
struct f_dynamic_attr {
int type;
enum f_type f_type;

2
nest/Makefile
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@ -1,4 +1,4 @@
src := a-path.c a-set.c cli.c cmds.c iface.c locks.c neighbor.c password.c proto.c rt-attr.c rt-dev.c rt-fib.c rt-show.c rt-table.c
src := assert.c a-path.c a-set.c cli.c cmds.c iface.c locks.c neighbor.c password.c proto.c rt-attr.c rt-dev.c rt-fib.c rt-show.c rt-table.c
obj := $(src-o-files)
$(all-daemon)
$(cf-local)

8
nest/assert.c Normal file
View File

@ -0,0 +1,8 @@
#include "nest/bird.h"
#include "filter/filter.h"
#include "nest/route.h"
_Static_assert(sizeof(struct f_val) >= sizeof(struct eattr), "Structures f_val and eattr not binary compatible!");
_Static_assert(OFFSETOF(struct f_val, val) == OFFSETOF(struct eattr, u), "Structures f_val and eattr not binary compatible!");
_Static_assert(sizeof(enum ea_type) == sizeof(enum f_type), "Structures f_val and eattr not binary compatible!");

54
nest/route.h
View File

@ -456,16 +456,6 @@ static inline int rte_is_reachable(rte *r)
* Extended Route Attributes
*/
typedef struct eattr {
word id; /* EA_CODE(PROTOCOL_..., protocol-dependent ID) */
byte flags; /* Protocol-dependent flags */
byte type; /* Attribute type and several flags (EAF_...) */
union {
u32 data;
struct adata *ptr; /* Attribute data elsewhere */
} u;
} eattr;
#define EA_CODE(proto,id) (((proto) << 8) | (id))
#define EA_PROTO(ea) ((ea) >> 8)
#define EA_ID(ea) ((ea) & 0xff)
@ -476,22 +466,34 @@ typedef struct eattr {
#define EA_ALLOW_UNDEF 0x10000 /* ea_find: allow EAF_TYPE_UNDEF */
#define EA_BIT(n) ((n) << 24) /* Used in bitfield accessors */
#define EAF_TYPE_MASK 0x1f /* Mask with this to get type */
#define EAF_TYPE_INT 0x01 /* 32-bit unsigned integer number */
#define EAF_TYPE_OPAQUE 0x02 /* Opaque byte string (not filterable) */
#define EAF_TYPE_IP_ADDRESS 0x04 /* IP address */
#define EAF_TYPE_ROUTER_ID 0x05 /* Router ID (IPv4 address) */
#define EAF_TYPE_AS_PATH 0x06 /* BGP AS path (encoding per RFC 1771:4.3) */
#define EAF_TYPE_BITFIELD 0x09 /* 32-bit embedded bitfield */
#define EAF_TYPE_INT_SET 0x0a /* Set of u32's (e.g., a community list) */
#define EAF_TYPE_EC_SET 0x0e /* Set of pairs of u32's - ext. community list */
#define EAF_TYPE_LC_SET 0x12 /* Set of triplets of u32's - large community list */
#define EAF_TYPE_UNDEF 0x1f /* `force undefined' entry */
#define EAF_EMBEDDED 0x01 /* Data stored in eattr.u.data (part of type spec) */
#define EAF_VAR_LENGTH 0x02 /* Attribute length is variable (part of type spec) */
#define EAF_ORIGINATED 0x20 /* The attribute has originated locally */
#define EAF_FRESH 0x40 /* An uncached attribute (e.g. modified in export filter) */
#define EAF_TEMP 0x80 /* A temporary attribute (the one stored in the tmp attr list) */
enum ea_type {
EAF_TYPE_MASK = 0x1f, /* Mask with this to get type */
EAF_TYPE_INT = 0x01, /* 32-bit unsigned integer number */
EAF_TYPE_OPAQUE = 0x02, /* Opaque byte string (not filterable) */
EAF_TYPE_IP_ADDRESS = 0x04, /* IP address */
EAF_TYPE_ROUTER_ID = 0x05, /* Router ID (IPv4 address) */
EAF_TYPE_AS_PATH = 0x06, /* BGP AS path (encoding per RFC 1771:4.3) */
EAF_TYPE_BITFIELD = 0x09, /* 32-bit embedded bitfield */
EAF_TYPE_INT_SET = 0x0a, /* Set of u32's (e.g., a community list) */
EAF_TYPE_EC_SET = 0x0e, /* Set of pairs of u32's - ext. community list */
EAF_TYPE_LC_SET = 0x12, /* Set of triplets of u32's - large community list */
EAF_TYPE_UNDEF = 0x1f, /* `force undefined' entry */
EAF_EMBEDDED = 0x01, /* Data stored in eattr.u.data (part of type spec) */
EAF_VAR_LENGTH = 0x02, /* Attribute length is variable (part of type spec) */
EAF_ORIGINATED = 0x20, /* The attribute has originated locally */
EAF_FRESH = 0x40, /* An uncached attribute (e.g. modified in export filter) */
EAF_TEMP = 0x80, /* A temporary attribute (the one stored in the tmp attr list) */
};
typedef struct eattr {
enum ea_type type; /* Attribute type and several flags (EAF_...) */
word id; /* EA_CODE(PROTOCOL_..., protocol-dependent ID) */
byte flags; /* Protocol-dependent flags */
union {
u32 data;
struct adata *ptr; /* Attribute data elsewhere */
} u;
} eattr;
typedef struct adata {
uint length; /* Length of data */