1#include <linux/bpf.h>
 2#include <bpf/bpf_helpers.h>
 3#include <bpf/bpf_endian.h>
 4
 
 
 5struct {
 6	__uint(type, BPF_MAP_TYPE_SOCKMAP);
 7	__uint(max_entries, 20);
 8	__type(key, int);
 9	__type(value, int);
10} sock_map_rx SEC(".maps");
11
12struct {
13	__uint(type, BPF_MAP_TYPE_SOCKMAP);
14	__uint(max_entries, 20);
15	__type(key, int);
16	__type(value, int);
17} sock_map_tx SEC(".maps");
18
19struct {
20	__uint(type, BPF_MAP_TYPE_SOCKMAP);
21	__uint(max_entries, 20);
22	__type(key, int);
23	__type(value, int);
24} sock_map_msg SEC(".maps");
25
26struct {
27	__uint(type, BPF_MAP_TYPE_ARRAY);
28	__uint(max_entries, 20);
29	__type(key, int);
30	__type(value, int);
31} sock_map_break SEC(".maps");
32
33SEC("sk_skb2")
34int bpf_prog2(struct __sk_buff *skb)
35{
36	void *data_end = (void *)(long) skb->data_end;
37	void *data = (void *)(long) skb->data;
38	__u32 lport = skb->local_port;
39	__u32 rport = skb->remote_port;
40	__u8 *d = data;
41	__u8 sk, map;
42
43	if (data + 8 > data_end)
44		return SK_DROP;
45
46	map = d[0];
47	sk = d[1];
48
49	d[0] = 0xd;
50	d[1] = 0xe;
51	d[2] = 0xa;
52	d[3] = 0xd;
53	d[4] = 0xb;
54	d[5] = 0xe;
55	d[6] = 0xe;
56	d[7] = 0xf;
57
58	if (!map)
59		return bpf_sk_redirect_map(skb, &sock_map_rx, sk, 0);
60	return bpf_sk_redirect_map(skb, &sock_map_tx, sk, 0);
61}
62
63char _license[] SEC("license") = "GPL";

 1#include <linux/bpf.h>
 2#include <bpf/bpf_helpers.h>
 3#include <bpf/bpf_endian.h>
 4
 5int _version SEC("version") = 1;
 6
 7struct {
 8	__uint(type, BPF_MAP_TYPE_SOCKMAP);
 9	__uint(max_entries, 20);
10	__uint(key_size, sizeof(int));
11	__uint(value_size, sizeof(int));
12} sock_map_rx SEC(".maps");
13
14struct {
15	__uint(type, BPF_MAP_TYPE_SOCKMAP);
16	__uint(max_entries, 20);
17	__uint(key_size, sizeof(int));
18	__uint(value_size, sizeof(int));
19} sock_map_tx SEC(".maps");
20
21struct {
22	__uint(type, BPF_MAP_TYPE_SOCKMAP);
23	__uint(max_entries, 20);
24	__uint(key_size, sizeof(int));
25	__uint(value_size, sizeof(int));
26} sock_map_msg SEC(".maps");
27
28struct {
29	__uint(type, BPF_MAP_TYPE_ARRAY);
30	__uint(max_entries, 20);
31	__type(key, int);
32	__type(value, int);
33} sock_map_break SEC(".maps");
34
35SEC("sk_skb2")
36int bpf_prog2(struct __sk_buff *skb)
37{
38	void *data_end = (void *)(long) skb->data_end;
39	void *data = (void *)(long) skb->data;
40	__u32 lport = skb->local_port;
41	__u32 rport = skb->remote_port;
42	__u8 *d = data;
43	__u8 sk, map;
44
45	if (data + 8 > data_end)
46		return SK_DROP;
47
48	map = d[0];
49	sk = d[1];
50
51	d[0] = 0xd;
52	d[1] = 0xe;
53	d[2] = 0xa;
54	d[3] = 0xd;
55	d[4] = 0xb;
56	d[5] = 0xe;
57	d[6] = 0xe;
58	d[7] = 0xf;
59
60	if (!map)
61		return bpf_sk_redirect_map(skb, &sock_map_rx, sk, 0);
62	return bpf_sk_redirect_map(skb, &sock_map_tx, sk, 0);
63}
64
65char _license[] SEC("license") = "GPL";