1bd4aed0eSJiong Wang #include <linux/bpf.h>
23e689141SToke Høiland-Jørgensen #include <bpf/bpf_helpers.h>
33e689141SToke Høiland-Jørgensen #include <bpf/bpf_endian.h>
4*c8ed6685SAndrii Nakryiko #include "bpf_misc.h"
5bd4aed0eSJiong Wang
61639b17cSAndrii Nakryiko struct {
71639b17cSAndrii Nakryiko __uint(type, BPF_MAP_TYPE_SOCKMAP);
81639b17cSAndrii Nakryiko __uint(max_entries, 20);
9bd368cb5SHengqi Chen __type(key, int);
10bd368cb5SHengqi Chen __type(value, int);
111639b17cSAndrii Nakryiko } sock_map_rx SEC(".maps");
12bd4aed0eSJiong Wang
131639b17cSAndrii Nakryiko struct {
141639b17cSAndrii Nakryiko __uint(type, BPF_MAP_TYPE_SOCKMAP);
151639b17cSAndrii Nakryiko __uint(max_entries, 20);
16bd368cb5SHengqi Chen __type(key, int);
17bd368cb5SHengqi Chen __type(value, int);
181639b17cSAndrii Nakryiko } sock_map_tx SEC(".maps");
19bd4aed0eSJiong Wang
201639b17cSAndrii Nakryiko struct {
211639b17cSAndrii Nakryiko __uint(type, BPF_MAP_TYPE_SOCKMAP);
221639b17cSAndrii Nakryiko __uint(max_entries, 20);
23bd368cb5SHengqi Chen __type(key, int);
24bd368cb5SHengqi Chen __type(value, int);
251639b17cSAndrii Nakryiko } sock_map_msg SEC(".maps");
26bd4aed0eSJiong Wang
271639b17cSAndrii Nakryiko struct {
281639b17cSAndrii Nakryiko __uint(type, BPF_MAP_TYPE_ARRAY);
291639b17cSAndrii Nakryiko __uint(max_entries, 20);
301639b17cSAndrii Nakryiko __type(key, int);
311639b17cSAndrii Nakryiko __type(value, int);
321639b17cSAndrii Nakryiko } sock_map_break SEC(".maps");
33bd4aed0eSJiong Wang
34bd4aed0eSJiong Wang SEC("sk_skb2")
bpf_prog2(struct __sk_buff * skb)35bd4aed0eSJiong Wang int bpf_prog2(struct __sk_buff *skb)
36bd4aed0eSJiong Wang {
37bd4aed0eSJiong Wang void *data_end = (void *)(long) skb->data_end;
38bd4aed0eSJiong Wang void *data = (void *)(long) skb->data;
39bd4aed0eSJiong Wang __u32 lport = skb->local_port;
40bd4aed0eSJiong Wang __u32 rport = skb->remote_port;
41bd4aed0eSJiong Wang __u8 *d = data;
42bd4aed0eSJiong Wang __u8 sk, map;
43bd4aed0eSJiong Wang
44*c8ed6685SAndrii Nakryiko __sink(lport);
45*c8ed6685SAndrii Nakryiko __sink(rport);
46*c8ed6685SAndrii Nakryiko
47bd4aed0eSJiong Wang if (data + 8 > data_end)
48bd4aed0eSJiong Wang return SK_DROP;
49bd4aed0eSJiong Wang
50bd4aed0eSJiong Wang map = d[0];
51bd4aed0eSJiong Wang sk = d[1];
52bd4aed0eSJiong Wang
53bd4aed0eSJiong Wang d[0] = 0xd;
54bd4aed0eSJiong Wang d[1] = 0xe;
55bd4aed0eSJiong Wang d[2] = 0xa;
56bd4aed0eSJiong Wang d[3] = 0xd;
57bd4aed0eSJiong Wang d[4] = 0xb;
58bd4aed0eSJiong Wang d[5] = 0xe;
59bd4aed0eSJiong Wang d[6] = 0xe;
60bd4aed0eSJiong Wang d[7] = 0xf;
61bd4aed0eSJiong Wang
62bd4aed0eSJiong Wang if (!map)
63bd4aed0eSJiong Wang return bpf_sk_redirect_map(skb, &sock_map_rx, sk, 0);
64bd4aed0eSJiong Wang return bpf_sk_redirect_map(skb, &sock_map_tx, sk, 0);
65bd4aed0eSJiong Wang }
66bd4aed0eSJiong Wang
67bd4aed0eSJiong Wang char _license[] SEC("license") = "GPL";
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