2 #include "bpf_helpers.h"
4 #include "bpf_endian.h"
6 int _version SEC("version") = 1;
8 #define bpf_printk(fmt, ...) \
10 char ____fmt[] = fmt; \
11 bpf_trace_printk(____fmt, sizeof(____fmt), \
15 struct bpf_map_def SEC("maps") sock_map_rx = {
16 .type = BPF_MAP_TYPE_SOCKMAP,
17 .key_size = sizeof(int),
18 .value_size = sizeof(int),
22 struct bpf_map_def SEC("maps") sock_map_tx = {
23 .type = BPF_MAP_TYPE_SOCKMAP,
24 .key_size = sizeof(int),
25 .value_size = sizeof(int),
29 struct bpf_map_def SEC("maps") sock_map_msg = {
30 .type = BPF_MAP_TYPE_SOCKMAP,
31 .key_size = sizeof(int),
32 .value_size = sizeof(int),
36 struct bpf_map_def SEC("maps") sock_map_break = {
37 .type = BPF_MAP_TYPE_ARRAY,
38 .key_size = sizeof(int),
39 .value_size = sizeof(int),
44 int bpf_prog2(struct __sk_buff *skb)
46 void *data_end = (void *)(long) skb->data_end;
47 void *data = (void *)(long) skb->data;
48 __u32 lport = skb->local_port;
49 __u32 rport = skb->remote_port;
53 if (data + 8 > data_end)
69 return bpf_sk_redirect_map(skb, &sock_map_rx, sk, 0);
70 return bpf_sk_redirect_map(skb, &sock_map_tx, sk, 0);
73 char _license[] SEC("license") = "GPL";