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
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_endian.h>
int cork_byte;
int push_start;
int push_end;
int apply_bytes;
struct {
__uint(type, BPF_MAP_TYPE_SOCKMAP);
__uint(max_entries, 20);
__type(key, int);
__type(value, int);
} sock_map SEC(".maps");
SEC("sk_msg")
int prog_sk_policy(struct sk_msg_md *msg)
{
if (cork_byte > 0)
bpf_msg_cork_bytes(msg, cork_byte);
if (push_start > 0 && push_end > 0)
bpf_msg_push_data(msg, push_start, push_end, 0);
return SK_PASS;
}
SEC("sk_msg")
int prog_sk_policy_redir(struct sk_msg_md *msg)
{
int two = 2;
bpf_msg_apply_bytes(msg, apply_bytes);
return bpf_msg_redirect_map(msg, &sock_map, two, 0);
}
|
