112 lines
2.1 KiB
C
112 lines
2.1 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- Filters
|
|
*
|
|
* (c) 1999 Pavel Machek <pavel@ucw.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_FILT_H_
|
|
#define _BIRD_FILT_H_
|
|
|
|
#include "lib/resource.h"
|
|
#include "lib/ip.h"
|
|
|
|
struct f_inst { /* Instruction */
|
|
struct f_inst *next; /* Structure is 16 bytes, anyway */
|
|
int code;
|
|
union {
|
|
int i;
|
|
void *p;
|
|
} a1;
|
|
union {
|
|
int i;
|
|
void *p;
|
|
} a2;
|
|
};
|
|
|
|
#define arg1 a1.p
|
|
#define arg2 a2.p
|
|
|
|
struct prefix {
|
|
ip_addr ip;
|
|
int len;
|
|
#define LEN_MASK 0xff
|
|
#define LEN_PLUS 0x10000
|
|
#define LEN_MINUS 0x20000
|
|
#define LEN_RANGE 0x40000
|
|
/* If range then prefix must be in range (len >> 8 & 0xff, len & 0xff) */
|
|
};
|
|
|
|
struct f_val {
|
|
int type;
|
|
union {
|
|
int i;
|
|
ip_addr ip;
|
|
struct prefix px;
|
|
char *s;
|
|
struct f_tree *t;
|
|
} val;
|
|
};
|
|
|
|
struct filter {
|
|
char *name;
|
|
struct f_inst *root;
|
|
};
|
|
|
|
void filters_postconfig(void);
|
|
struct f_inst *f_new_inst(void);
|
|
struct f_tree *f_new_tree(void);
|
|
|
|
struct f_tree *build_tree(struct f_tree *);
|
|
struct f_tree *find_tree(struct f_tree *t, struct f_val val);
|
|
|
|
struct ea_list;
|
|
struct rte;
|
|
|
|
int f_run(struct filter *filter, struct rte **rte, struct ea_list **tmp_attrs, struct linpool *tmp_pool);
|
|
char *filter_name(struct filter *filter);
|
|
|
|
int val_compare(struct f_val v1, struct f_val v2);
|
|
void val_print(struct f_val v);
|
|
|
|
#define F_NOP 0
|
|
#define F_NONL 1
|
|
#define F_ACCEPT 2 /* Need to preserve ordering: accepts < rejects! */
|
|
#define F_MODIFY 3 /* FIXME: Introduce modification flags instead? */
|
|
#define F_REJECT 4
|
|
#define F_ERROR 5
|
|
#define F_QUITBIRD 6
|
|
|
|
#define FILTER_ACCEPT NULL
|
|
#define FILTER_REJECT ((void *) 1)
|
|
|
|
/* Type numbers must be in 0..0xff range */
|
|
#define T_MASK 0xff
|
|
|
|
/* Internal types */
|
|
#define T_VOID 0
|
|
#define T_RETURN 1
|
|
|
|
/* User visible types, which fit in int */
|
|
#define T_INT 0x10
|
|
#define T_BOOL 0x11
|
|
#define T_PAIR 0x12
|
|
#define T_ENUM 0x13
|
|
|
|
/* Bigger ones */
|
|
#define T_IP 0x20
|
|
#define T_PREFIX 0x21
|
|
#define T_STRING 0x22
|
|
|
|
#define T_SET 0x80
|
|
|
|
struct f_tree {
|
|
struct f_tree *left, *right;
|
|
struct f_val from, to;
|
|
void *data;
|
|
};
|
|
|
|
#define NEW_F_VAL struct f_val * val; val = cfg_alloc(sizeof(struct f_val));
|
|
|
|
#endif
|