1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
#ifndef FILTER_H_
#define FILTER_H_
#include <linux/filter.h>
#include <linux/audit.h>
#include <linux/seccomp.h>
#define JGE(nr, right, left) \
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, (nr), (right), (left))
#define JUMPA(jump) BPF_JUMP(BPF_JMP | BPF_JA, (jump), 0, 0)
#define EQ(nr, a1, a2) BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, (nr), (a1), (a2))
#define MAX_FILTER 1024
#define MAX_JUMPS 128
#define EMPTY -1
struct bpf_call {
char *name;
int args[6];
bool check_arg[6];
};
struct syscall_entry {
unsigned int count;
long nr;
const struct bpf_call *entry;
};
void create_lookup_nodes(int jumps[], unsigned int n);
unsigned int left_child(unsigned int parent_index);
unsigned int right_child(unsigned int parent_index);
unsigned int create_bfp_program(struct syscall_entry table[],
struct sock_filter filter[],
unsigned int n_syscall);
int convert_bpf(char *file, struct bpf_call *entries, int n);
#endif
|